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linux/drivers/scsi/lpfc/lpfc_sli.c
Frederik Schwarzer 025dfdafe7 trivial: fix then -> than typos in comments and documentation 
- (better, more, bigger ...) then -> (...) than

Signed-off-by: Frederik Schwarzer <schwarzerf@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-01-06 11:28:06 +01:00

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/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
* Copyright (C) 2004-2008 Emulex. All rights reserved. *
* EMULEX and SLI are trademarks of Emulex. *
* www.emulex.com *
* Portions Copyright (C) 2004-2005 Christoph Hellwig *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of version 2 of the GNU General *
* Public License as published by the Free Software Foundation. *
* This program is distributed in the hope that it will be useful. *
* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
* TO BE LEGALLY INVALID. See the GNU General Public License for *
* more details, a copy of which can be found in the file COPYING *
* included with this package. *
*******************************************************************/
#include <linux/blkdev.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_fc.h>
#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_crtn.h"
#include "lpfc_logmsg.h"
#include "lpfc_compat.h"
#include "lpfc_debugfs.h"
/*
* Define macro to log: Mailbox command x%x cannot issue Data
* This allows multiple uses of lpfc_msgBlk0311
* w/o perturbing log msg utility.
*/
#define LOG_MBOX_CANNOT_ISSUE_DATA(phba, pmbox, psli, flag) \
lpfc_printf_log(phba, \
KERN_INFO, \
LOG_MBOX | LOG_SLI, \
"(%d):0311 Mailbox command x%x cannot " \
"issue Data: x%x x%x x%x\n", \
pmbox->vport ? pmbox->vport->vpi : 0, \
pmbox->mb.mbxCommand, \
phba->pport->port_state, \
psli->sli_flag, \
flag)
/* There are only four IOCB completion types. */
typedef enum _lpfc_iocb_type {
LPFC_UNKNOWN_IOCB,
LPFC_UNSOL_IOCB,
LPFC_SOL_IOCB,
LPFC_ABORT_IOCB
} lpfc_iocb_type;
/**
* lpfc_cmd_iocb: Get next command iocb entry in the ring.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
*
* This function returns pointer to next command iocb entry
* in the command ring. The caller must hold hbalock to prevent
* other threads consume the next command iocb.
* SLI-2/SLI-3 provide different sized iocbs.
**/
static inline IOCB_t *
lpfc_cmd_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
return (IOCB_t *) (((char *) pring->cmdringaddr) +
pring->cmdidx * phba->iocb_cmd_size);
}
/**
* lpfc_resp_iocb: Get next response iocb entry in the ring.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
*
* This function returns pointer to next response iocb entry
* in the response ring. The caller must hold hbalock to make sure
* that no other thread consume the next response iocb.
* SLI-2/SLI-3 provide different sized iocbs.
**/
static inline IOCB_t *
lpfc_resp_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
return (IOCB_t *) (((char *) pring->rspringaddr) +
pring->rspidx * phba->iocb_rsp_size);
}
/**
* __lpfc_sli_get_iocbq: Allocates an iocb object from iocb pool.
* @phba: Pointer to HBA context object.
*
* This function is called with hbalock held. This function
* allocates a new driver iocb object from the iocb pool. If the
* allocation is successful, it returns pointer to the newly
* allocated iocb object else it returns NULL.
**/
static struct lpfc_iocbq *
__lpfc_sli_get_iocbq(struct lpfc_hba *phba)
{
struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
struct lpfc_iocbq * iocbq = NULL;
list_remove_head(lpfc_iocb_list, iocbq, struct lpfc_iocbq, list);
return iocbq;
}
/**
* lpfc_sli_get_iocbq: Allocates an iocb object from iocb pool.
* @phba: Pointer to HBA context object.
*
* This function is called with no lock held. This function
* allocates a new driver iocb object from the iocb pool. If the
* allocation is successful, it returns pointer to the newly
* allocated iocb object else it returns NULL.
**/
struct lpfc_iocbq *
lpfc_sli_get_iocbq(struct lpfc_hba *phba)
{
struct lpfc_iocbq * iocbq = NULL;
unsigned long iflags;
spin_lock_irqsave(&phba->hbalock, iflags);
iocbq = __lpfc_sli_get_iocbq(phba);
spin_unlock_irqrestore(&phba->hbalock, iflags);
return iocbq;
}
/**
* __lpfc_sli_release_iocbq: Release iocb to the iocb pool.
* @phba: Pointer to HBA context object.
* @iocbq: Pointer to driver iocb object.
*
* This function is called with hbalock held to release driver
* iocb object to the iocb pool. The iotag in the iocb object
* does not change for each use of the iocb object. This function
* clears all other fields of the iocb object when it is freed.
**/
static void
__lpfc_sli_release_iocbq(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq)
{
size_t start_clean = offsetof(struct lpfc_iocbq, iocb);
/*
* Clean all volatile data fields, preserve iotag and node struct.
*/
memset((char*)iocbq + start_clean, 0, sizeof(*iocbq) - start_clean);
list_add_tail(&iocbq->list, &phba->lpfc_iocb_list);
}
/**
* lpfc_sli_release_iocbq: Release iocb to the iocb pool.
* @phba: Pointer to HBA context object.
* @iocbq: Pointer to driver iocb object.
*
* This function is called with no lock held to release the iocb to
* iocb pool.
**/
void
lpfc_sli_release_iocbq(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq)
{
unsigned long iflags;
/*
* Clean all volatile data fields, preserve iotag and node struct.
*/
spin_lock_irqsave(&phba->hbalock, iflags);
__lpfc_sli_release_iocbq(phba, iocbq);
spin_unlock_irqrestore(&phba->hbalock, iflags);
}
/**
* lpfc_sli_iocb_cmd_type: Get the iocb type.
* @iocb_cmnd : iocb command code.
*
* This function is called by ring event handler function to get the iocb type.
* This function translates the iocb command to an iocb command type used to
* decide the final disposition of each completed IOCB.
* The function returns
* LPFC_UNKNOWN_IOCB if it is an unsupported iocb
* LPFC_SOL_IOCB if it is a solicited iocb completion
* LPFC_ABORT_IOCB if it is an abort iocb
* LPFC_UNSOL_IOCB if it is an unsolicited iocb
*
* The caller is not required to hold any lock.
**/
static lpfc_iocb_type
lpfc_sli_iocb_cmd_type(uint8_t iocb_cmnd)
{
lpfc_iocb_type type = LPFC_UNKNOWN_IOCB;
if (iocb_cmnd > CMD_MAX_IOCB_CMD)
return 0;
switch (iocb_cmnd) {
case CMD_XMIT_SEQUENCE_CR:
case CMD_XMIT_SEQUENCE_CX:
case CMD_XMIT_BCAST_CN:
case CMD_XMIT_BCAST_CX:
case CMD_ELS_REQUEST_CR:
case CMD_ELS_REQUEST_CX:
case CMD_CREATE_XRI_CR:
case CMD_CREATE_XRI_CX:
case CMD_GET_RPI_CN:
case CMD_XMIT_ELS_RSP_CX:
case CMD_GET_RPI_CR:
case CMD_FCP_IWRITE_CR:
case CMD_FCP_IWRITE_CX:
case CMD_FCP_IREAD_CR:
case CMD_FCP_IREAD_CX:
case CMD_FCP_ICMND_CR:
case CMD_FCP_ICMND_CX:
case CMD_FCP_TSEND_CX:
case CMD_FCP_TRSP_CX:
case CMD_FCP_TRECEIVE_CX:
case CMD_FCP_AUTO_TRSP_CX:
case CMD_ADAPTER_MSG:
case CMD_ADAPTER_DUMP:
case CMD_XMIT_SEQUENCE64_CR:
case CMD_XMIT_SEQUENCE64_CX:
case CMD_XMIT_BCAST64_CN:
case CMD_XMIT_BCAST64_CX:
case CMD_ELS_REQUEST64_CR:
case CMD_ELS_REQUEST64_CX:
case CMD_FCP_IWRITE64_CR:
case CMD_FCP_IWRITE64_CX:
case CMD_FCP_IREAD64_CR:
case CMD_FCP_IREAD64_CX:
case CMD_FCP_ICMND64_CR:
case CMD_FCP_ICMND64_CX:
case CMD_FCP_TSEND64_CX:
case CMD_FCP_TRSP64_CX:
case CMD_FCP_TRECEIVE64_CX:
case CMD_GEN_REQUEST64_CR:
case CMD_GEN_REQUEST64_CX:
case CMD_XMIT_ELS_RSP64_CX:
type = LPFC_SOL_IOCB;
break;
case CMD_ABORT_XRI_CN:
case CMD_ABORT_XRI_CX:
case CMD_CLOSE_XRI_CN:
case CMD_CLOSE_XRI_CX:
case CMD_XRI_ABORTED_CX:
case CMD_ABORT_MXRI64_CN:
type = LPFC_ABORT_IOCB;
break;
case CMD_RCV_SEQUENCE_CX:
case CMD_RCV_ELS_REQ_CX:
case CMD_RCV_SEQUENCE64_CX:
case CMD_RCV_ELS_REQ64_CX:
case CMD_ASYNC_STATUS:
case CMD_IOCB_RCV_SEQ64_CX:
case CMD_IOCB_RCV_ELS64_CX:
case CMD_IOCB_RCV_CONT64_CX:
case CMD_IOCB_RET_XRI64_CX:
type = LPFC_UNSOL_IOCB;
break;
case CMD_IOCB_XMIT_MSEQ64_CR:
case CMD_IOCB_XMIT_MSEQ64_CX:
case CMD_IOCB_RCV_SEQ_LIST64_CX:
case CMD_IOCB_RCV_ELS_LIST64_CX:
case CMD_IOCB_CLOSE_EXTENDED_CN:
case CMD_IOCB_ABORT_EXTENDED_CN:
case CMD_IOCB_RET_HBQE64_CN:
case CMD_IOCB_FCP_IBIDIR64_CR:
case CMD_IOCB_FCP_IBIDIR64_CX:
case CMD_IOCB_FCP_ITASKMGT64_CX:
case CMD_IOCB_LOGENTRY_CN:
case CMD_IOCB_LOGENTRY_ASYNC_CN:
printk("%s - Unhandled SLI-3 Command x%x\n",
__func__, iocb_cmnd);
type = LPFC_UNKNOWN_IOCB;
break;
default:
type = LPFC_UNKNOWN_IOCB;
break;
}
return type;
}
/**
* lpfc_sli_ring_map: Issue config_ring mbox for all rings.
* @phba: Pointer to HBA context object.
*
* This function is called from SLI initialization code
* to configure every ring of the HBA's SLI interface. The
* caller is not required to hold any lock. This function issues
* a config_ring mailbox command for each ring.
* This function returns zero if successful else returns a negative
* error code.
**/
static int
lpfc_sli_ring_map(struct lpfc_hba *phba)
{
struct lpfc_sli *psli = &phba->sli;
LPFC_MBOXQ_t *pmb;
MAILBOX_t *pmbox;
int i, rc, ret = 0;
pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!pmb)
return -ENOMEM;
pmbox = &pmb->mb;
phba->link_state = LPFC_INIT_MBX_CMDS;
for (i = 0; i < psli->num_rings; i++) {
lpfc_config_ring(phba, i, pmb);
rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);
if (rc != MBX_SUCCESS) {
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"0446 Adapter failed to init (%d), "
"mbxCmd x%x CFG_RING, mbxStatus x%x, "
"ring %d\n",
rc, pmbox->mbxCommand,
pmbox->mbxStatus, i);
phba->link_state = LPFC_HBA_ERROR;
ret = -ENXIO;
break;
}
}
mempool_free(pmb, phba->mbox_mem_pool);
return ret;
}
/**
* lpfc_sli_ringtxcmpl_put: Adds new iocb to the txcmplq.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @piocb: Pointer to the driver iocb object.
*
* This function is called with hbalock held. The function adds the
* new iocb to txcmplq of the given ring. This function always returns
* 0. If this function is called for ELS ring, this function checks if
* there is a vport associated with the ELS command. This function also
* starts els_tmofunc timer if this is an ELS command.
**/
static int
lpfc_sli_ringtxcmpl_put(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
struct lpfc_iocbq *piocb)
{
list_add_tail(&piocb->list, &pring->txcmplq);
pring->txcmplq_cnt++;
if ((unlikely(pring->ringno == LPFC_ELS_RING)) &&
(piocb->iocb.ulpCommand != CMD_ABORT_XRI_CN) &&
(piocb->iocb.ulpCommand != CMD_CLOSE_XRI_CN)) {
if (!piocb->vport)
BUG();
else
mod_timer(&piocb->vport->els_tmofunc,
jiffies + HZ * (phba->fc_ratov << 1));
}
return 0;
}
/**
* lpfc_sli_ringtx_get: Get first element of the txq.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
*
* This function is called with hbalock held to get next
* iocb in txq of the given ring. If there is any iocb in
* the txq, the function returns first iocb in the list after
* removing the iocb from the list, else it returns NULL.
**/
static struct lpfc_iocbq *
lpfc_sli_ringtx_get(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
struct lpfc_iocbq *cmd_iocb;
list_remove_head((&pring->txq), cmd_iocb, struct lpfc_iocbq, list);
if (cmd_iocb != NULL)
pring->txq_cnt--;
return cmd_iocb;
}
/**
* lpfc_sli_next_iocb_slot: Get next iocb slot in the ring.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
*
* This function is called with hbalock held and the caller must post the
* iocb without releasing the lock. If the caller releases the lock,
* iocb slot returned by the function is not guaranteed to be available.
* The function returns pointer to the next available iocb slot if there
* is available slot in the ring, else it returns NULL.
* If the get index of the ring is ahead of the put index, the function
* will post an error attention event to the worker thread to take the
* HBA to offline state.
**/
static IOCB_t *
lpfc_sli_next_iocb_slot (struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
struct lpfc_pgp *pgp = &phba->port_gp[pring->ringno];
uint32_t max_cmd_idx = pring->numCiocb;
if ((pring->next_cmdidx == pring->cmdidx) &&
(++pring->next_cmdidx >= max_cmd_idx))
pring->next_cmdidx = 0;
if (unlikely(pring->local_getidx == pring->next_cmdidx)) {
pring->local_getidx = le32_to_cpu(pgp->cmdGetInx);
if (unlikely(pring->local_getidx >= max_cmd_idx)) {
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"0315 Ring %d issue: portCmdGet %d "
"is bigger than cmd ring %d\n",
pring->ringno,
pring->local_getidx, max_cmd_idx);
phba->link_state = LPFC_HBA_ERROR;
/*
* All error attention handlers are posted to
* worker thread
*/
phba->work_ha |= HA_ERATT;
phba->work_hs = HS_FFER3;
lpfc_worker_wake_up(phba);
return NULL;
}
if (pring->local_getidx == pring->next_cmdidx)
return NULL;
}
return lpfc_cmd_iocb(phba, pring);
}
/**
* lpfc_sli_next_iotag: Get an iotag for the iocb.
* @phba: Pointer to HBA context object.
* @iocbq: Pointer to driver iocb object.
*
* This function gets an iotag for the iocb. If there is no unused iotag and
* the iocbq_lookup_len < 0xffff, this function allocates a bigger iotag_lookup
* array and assigns a new iotag.
* The function returns the allocated iotag if successful, else returns zero.
* Zero is not a valid iotag.
* The caller is not required to hold any lock.
**/
uint16_t
lpfc_sli_next_iotag(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq)
{
struct lpfc_iocbq **new_arr;
struct lpfc_iocbq **old_arr;
size_t new_len;
struct lpfc_sli *psli = &phba->sli;
uint16_t iotag;
spin_lock_irq(&phba->hbalock);
iotag = psli->last_iotag;
if(++iotag < psli->iocbq_lookup_len) {
psli->last_iotag = iotag;
psli->iocbq_lookup[iotag] = iocbq;
spin_unlock_irq(&phba->hbalock);
iocbq->iotag = iotag;
return iotag;
} else if (psli->iocbq_lookup_len < (0xffff
- LPFC_IOCBQ_LOOKUP_INCREMENT)) {
new_len = psli->iocbq_lookup_len + LPFC_IOCBQ_LOOKUP_INCREMENT;
spin_unlock_irq(&phba->hbalock);
new_arr = kzalloc(new_len * sizeof (struct lpfc_iocbq *),
GFP_KERNEL);
if (new_arr) {
spin_lock_irq(&phba->hbalock);
old_arr = psli->iocbq_lookup;
if (new_len <= psli->iocbq_lookup_len) {
/* highly unprobable case */
kfree(new_arr);
iotag = psli->last_iotag;
if(++iotag < psli->iocbq_lookup_len) {
psli->last_iotag = iotag;
psli->iocbq_lookup[iotag] = iocbq;
spin_unlock_irq(&phba->hbalock);
iocbq->iotag = iotag;
return iotag;
}
spin_unlock_irq(&phba->hbalock);
return 0;
}
if (psli->iocbq_lookup)
memcpy(new_arr, old_arr,
((psli->last_iotag + 1) *
sizeof (struct lpfc_iocbq *)));
psli->iocbq_lookup = new_arr;
psli->iocbq_lookup_len = new_len;
psli->last_iotag = iotag;
psli->iocbq_lookup[iotag] = iocbq;
spin_unlock_irq(&phba->hbalock);
iocbq->iotag = iotag;
kfree(old_arr);
return iotag;
}
} else
spin_unlock_irq(&phba->hbalock);
lpfc_printf_log(phba, KERN_ERR,LOG_SLI,
"0318 Failed to allocate IOTAG.last IOTAG is %d\n",
psli->last_iotag);
return 0;
}
/**
* lpfc_sli_submit_iocb: Submit an iocb to the firmware.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @iocb: Pointer to iocb slot in the ring.
* @nextiocb: Pointer to driver iocb object which need to be
* posted to firmware.
*
* This function is called with hbalock held to post a new iocb to
* the firmware. This function copies the new iocb to ring iocb slot and
* updates the ring pointers. It adds the new iocb to txcmplq if there is
* a completion call back for this iocb else the function will free the
* iocb object.
**/
static void
lpfc_sli_submit_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
IOCB_t *iocb, struct lpfc_iocbq *nextiocb)
{
/*
* Set up an iotag
*/
nextiocb->iocb.ulpIoTag = (nextiocb->iocb_cmpl) ? nextiocb->iotag : 0;
if (pring->ringno == LPFC_ELS_RING) {
lpfc_debugfs_slow_ring_trc(phba,
"IOCB cmd ring: wd4:x%08x wd6:x%08x wd7:x%08x",
*(((uint32_t *) &nextiocb->iocb) + 4),
*(((uint32_t *) &nextiocb->iocb) + 6),
*(((uint32_t *) &nextiocb->iocb) + 7));
}
/*
* Issue iocb command to adapter
*/
lpfc_sli_pcimem_bcopy(&nextiocb->iocb, iocb, phba->iocb_cmd_size);
wmb();
pring->stats.iocb_cmd++;
/*
* If there is no completion routine to call, we can release the
* IOCB buffer back right now. For IOCBs, like QUE_RING_BUF,
* that have no rsp ring completion, iocb_cmpl MUST be NULL.
*/
if (nextiocb->iocb_cmpl)
lpfc_sli_ringtxcmpl_put(phba, pring, nextiocb);
else
__lpfc_sli_release_iocbq(phba, nextiocb);
/*
* Let the HBA know what IOCB slot will be the next one the
* driver will put a command into.
*/
pring->cmdidx = pring->next_cmdidx;
writel(pring->cmdidx, &phba->host_gp[pring->ringno].cmdPutInx);
}
/**
* lpfc_sli_update_full_ring: Update the chip attention register.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
*
* The caller is not required to hold any lock for calling this function.
* This function updates the chip attention bits for the ring to inform firmware
* that there are pending work to be done for this ring and requests an
* interrupt when there is space available in the ring. This function is
* called when the driver is unable to post more iocbs to the ring due
* to unavailability of space in the ring.
**/
static void
lpfc_sli_update_full_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
int ringno = pring->ringno;
pring->flag |= LPFC_CALL_RING_AVAILABLE;
wmb();
/*
* Set ring 'ringno' to SET R0CE_REQ in Chip Att register.
* The HBA will tell us when an IOCB entry is available.
*/
writel((CA_R0ATT|CA_R0CE_REQ) << (ringno*4), phba->CAregaddr);
readl(phba->CAregaddr); /* flush */
pring->stats.iocb_cmd_full++;
}
/**
* lpfc_sli_update_ring: Update chip attention register.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
*
* This function updates the chip attention register bit for the
* given ring to inform HBA that there is more work to be done
* in this ring. The caller is not required to hold any lock.
**/
static void
lpfc_sli_update_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
int ringno = pring->ringno;
/*
* Tell the HBA that there is work to do in this ring.
*/
if (!(phba->sli3_options & LPFC_SLI3_CRP_ENABLED)) {
wmb();
writel(CA_R0ATT << (ringno * 4), phba->CAregaddr);
readl(phba->CAregaddr); /* flush */
}
}
/**
* lpfc_sli_resume_iocb: Process iocbs in the txq.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
*
* This function is called with hbalock held to post pending iocbs
* in the txq to the firmware. This function is called when driver
* detects space available in the ring.
**/
static void
lpfc_sli_resume_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
IOCB_t *iocb;
struct lpfc_iocbq *nextiocb;
/*
* Check to see if:
* (a) there is anything on the txq to send
* (b) link is up
* (c) link attention events can be processed (fcp ring only)
* (d) IOCB processing is not blocked by the outstanding mbox command.
*/
if (pring->txq_cnt &&
lpfc_is_link_up(phba) &&
(pring->ringno != phba->sli.fcp_ring ||
phba->sli.sli_flag & LPFC_PROCESS_LA)) {
while ((iocb = lpfc_sli_next_iocb_slot(phba, pring)) &&
(nextiocb = lpfc_sli_ringtx_get(phba, pring)))
lpfc_sli_submit_iocb(phba, pring, iocb, nextiocb);
if (iocb)
lpfc_sli_update_ring(phba, pring);
else
lpfc_sli_update_full_ring(phba, pring);
}
return;
}
/**
* lpfc_sli_next_hbq_slot: Get next hbq entry for the HBQ.
* @phba: Pointer to HBA context object.
* @hbqno: HBQ number.
*
* This function is called with hbalock held to get the next
* available slot for the given HBQ. If there is free slot
* available for the HBQ it will return pointer to the next available
* HBQ entry else it will return NULL.
**/
static struct lpfc_hbq_entry *
lpfc_sli_next_hbq_slot(struct lpfc_hba *phba, uint32_t hbqno)
{
struct hbq_s *hbqp = &phba->hbqs[hbqno];
if (hbqp->next_hbqPutIdx == hbqp->hbqPutIdx &&
++hbqp->next_hbqPutIdx >= hbqp->entry_count)
hbqp->next_hbqPutIdx = 0;
if (unlikely(hbqp->local_hbqGetIdx == hbqp->next_hbqPutIdx)) {
uint32_t raw_index = phba->hbq_get[hbqno];
uint32_t getidx = le32_to_cpu(raw_index);
hbqp->local_hbqGetIdx = getidx;
if (unlikely(hbqp->local_hbqGetIdx >= hbqp->entry_count)) {
lpfc_printf_log(phba, KERN_ERR,
LOG_SLI | LOG_VPORT,
"1802 HBQ %d: local_hbqGetIdx "
"%u is > than hbqp->entry_count %u\n",
hbqno, hbqp->local_hbqGetIdx,
hbqp->entry_count);
phba->link_state = LPFC_HBA_ERROR;
return NULL;
}
if (hbqp->local_hbqGetIdx == hbqp->next_hbqPutIdx)
return NULL;
}
return (struct lpfc_hbq_entry *) phba->hbqs[hbqno].hbq_virt +
hbqp->hbqPutIdx;
}
/**
* lpfc_sli_hbqbuf_free_all: Free all the hbq buffers.
* @phba: Pointer to HBA context object.
*
* This function is called with no lock held to free all the
* hbq buffers while uninitializing the SLI interface. It also
* frees the HBQ buffers returned by the firmware but not yet
* processed by the upper layers.
**/
void
lpfc_sli_hbqbuf_free_all(struct lpfc_hba *phba)
{
struct lpfc_dmabuf *dmabuf, *next_dmabuf;
struct hbq_dmabuf *hbq_buf;
unsigned long flags;
int i, hbq_count;
uint32_t hbqno;
hbq_count = lpfc_sli_hbq_count();
/* Return all memory used by all HBQs */
spin_lock_irqsave(&phba->hbalock, flags);
for (i = 0; i < hbq_count; ++i) {
list_for_each_entry_safe(dmabuf, next_dmabuf,
&phba->hbqs[i].hbq_buffer_list, list) {
hbq_buf = container_of(dmabuf, struct hbq_dmabuf, dbuf);
list_del(&hbq_buf->dbuf.list);
(phba->hbqs[i].hbq_free_buffer)(phba, hbq_buf);
}
phba->hbqs[i].buffer_count = 0;
}
/* Return all HBQ buffer that are in-fly */
list_for_each_entry_safe(dmabuf, next_dmabuf,
&phba->hbqbuf_in_list, list) {
hbq_buf = container_of(dmabuf, struct hbq_dmabuf, dbuf);
list_del(&hbq_buf->dbuf.list);
if (hbq_buf->tag == -1) {
(phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
(phba, hbq_buf);
} else {
hbqno = hbq_buf->tag >> 16;
if (hbqno >= LPFC_MAX_HBQS)
(phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
(phba, hbq_buf);
else
(phba->hbqs[hbqno].hbq_free_buffer)(phba,
hbq_buf);
}
}
/* Mark the HBQs not in use */
phba->hbq_in_use = 0;
spin_unlock_irqrestore(&phba->hbalock, flags);
}
/**
* lpfc_sli_hbq_to_firmware: Post the hbq buffer to firmware.
* @phba: Pointer to HBA context object.
* @hbqno: HBQ number.
* @hbq_buf: Pointer to HBQ buffer.
*
* This function is called with the hbalock held to post a
* hbq buffer to the firmware. If the function finds an empty
* slot in the HBQ, it will post the buffer. The function will return
* pointer to the hbq entry if it successfully post the buffer
* else it will return NULL.
**/
static struct lpfc_hbq_entry *
lpfc_sli_hbq_to_firmware(struct lpfc_hba *phba, uint32_t hbqno,
struct hbq_dmabuf *hbq_buf)
{
struct lpfc_hbq_entry *hbqe;
dma_addr_t physaddr = hbq_buf->dbuf.phys;
/* Get next HBQ entry slot to use */
hbqe = lpfc_sli_next_hbq_slot(phba, hbqno);
if (hbqe) {
struct hbq_s *hbqp = &phba->hbqs[hbqno];
hbqe->bde.addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
hbqe->bde.addrLow = le32_to_cpu(putPaddrLow(physaddr));
hbqe->bde.tus.f.bdeSize = hbq_buf->size;
hbqe->bde.tus.f.bdeFlags = 0;
hbqe->bde.tus.w = le32_to_cpu(hbqe->bde.tus.w);
hbqe->buffer_tag = le32_to_cpu(hbq_buf->tag);
/* Sync SLIM */
hbqp->hbqPutIdx = hbqp->next_hbqPutIdx;
writel(hbqp->hbqPutIdx, phba->hbq_put + hbqno);
/* flush */
readl(phba->hbq_put + hbqno);
list_add_tail(&hbq_buf->dbuf.list, &hbqp->hbq_buffer_list);
}
return hbqe;
}
/* HBQ for ELS and CT traffic. */
static struct lpfc_hbq_init lpfc_els_hbq = {
.rn = 1,
.entry_count = 200,
.mask_count = 0,
.profile = 0,
.ring_mask = (1 << LPFC_ELS_RING),
.buffer_count = 0,
.init_count = 20,
.add_count = 5,
};
/* HBQ for the extra ring if needed */
static struct lpfc_hbq_init lpfc_extra_hbq = {
.rn = 1,
.entry_count = 200,
.mask_count = 0,
.profile = 0,
.ring_mask = (1 << LPFC_EXTRA_RING),
.buffer_count = 0,
.init_count = 0,
.add_count = 5,
};
/* Array of HBQs */
struct lpfc_hbq_init *lpfc_hbq_defs[] = {
&lpfc_els_hbq,
&lpfc_extra_hbq,
};
/**
* lpfc_sli_hbqbuf_fill_hbqs: Post more hbq buffers to HBQ.
* @phba: Pointer to HBA context object.
* @hbqno: HBQ number.
* @count: Number of HBQ buffers to be posted.
*
* This function is called with no lock held to post more hbq buffers to the
* given HBQ. The function returns the number of HBQ buffers successfully
* posted.
**/
static int
lpfc_sli_hbqbuf_fill_hbqs(struct lpfc_hba *phba, uint32_t hbqno, uint32_t count)
{
uint32_t i, posted = 0;
unsigned long flags;
struct hbq_dmabuf *hbq_buffer;
LIST_HEAD(hbq_buf_list);
if (!phba->hbqs[hbqno].hbq_alloc_buffer)
return 0;
if ((phba->hbqs[hbqno].buffer_count + count) >
lpfc_hbq_defs[hbqno]->entry_count)
count = lpfc_hbq_defs[hbqno]->entry_count -
phba->hbqs[hbqno].buffer_count;
if (!count)
return 0;
/* Allocate HBQ entries */
for (i = 0; i < count; i++) {
hbq_buffer = (phba->hbqs[hbqno].hbq_alloc_buffer)(phba);
if (!hbq_buffer)
break;
list_add_tail(&hbq_buffer->dbuf.list, &hbq_buf_list);
}
/* Check whether HBQ is still in use */
spin_lock_irqsave(&phba->hbalock, flags);
if (!phba->hbq_in_use)
goto err;
while (!list_empty(&hbq_buf_list)) {
list_remove_head(&hbq_buf_list, hbq_buffer, struct hbq_dmabuf,
dbuf.list);
hbq_buffer->tag = (phba->hbqs[hbqno].buffer_count |
(hbqno << 16));
if (lpfc_sli_hbq_to_firmware(phba, hbqno, hbq_buffer)) {
phba->hbqs[hbqno].buffer_count++;
posted++;
} else
(phba->hbqs[hbqno].hbq_free_buffer)(phba, hbq_buffer);
}
spin_unlock_irqrestore(&phba->hbalock, flags);
return posted;
err:
spin_unlock_irqrestore(&phba->hbalock, flags);
while (!list_empty(&hbq_buf_list)) {
list_remove_head(&hbq_buf_list, hbq_buffer, struct hbq_dmabuf,
dbuf.list);
(phba->hbqs[hbqno].hbq_free_buffer)(phba, hbq_buffer);
}
return 0;
}
/**
* lpfc_sli_hbqbuf_add_hbqs: Post more HBQ buffers to firmware.
* @phba: Pointer to HBA context object.
* @qno: HBQ number.
*
* This function posts more buffers to the HBQ. This function
* is called with no lock held. The function returns the number of HBQ entries
* successfully allocated.
**/
int
lpfc_sli_hbqbuf_add_hbqs(struct lpfc_hba *phba, uint32_t qno)
{
return(lpfc_sli_hbqbuf_fill_hbqs(phba, qno,
lpfc_hbq_defs[qno]->add_count));
}
/**
* lpfc_sli_hbqbuf_init_hbqs: Post initial buffers to the HBQ.
* @phba: Pointer to HBA context object.
* @qno: HBQ queue number.
*
* This function is called from SLI initialization code path with
* no lock held to post initial HBQ buffers to firmware. The
* function returns the number of HBQ entries successfully allocated.
**/
static int
lpfc_sli_hbqbuf_init_hbqs(struct lpfc_hba *phba, uint32_t qno)
{
return(lpfc_sli_hbqbuf_fill_hbqs(phba, qno,
lpfc_hbq_defs[qno]->init_count));
}
/**
* lpfc_sli_hbqbuf_find: Find the hbq buffer associated with a tag.
* @phba: Pointer to HBA context object.
* @tag: Tag of the hbq buffer.
*
* This function is called with hbalock held. This function searches
* for the hbq buffer associated with the given tag in the hbq buffer
* list. If it finds the hbq buffer, it returns the hbq_buffer other wise
* it returns NULL.
**/
static struct hbq_dmabuf *
lpfc_sli_hbqbuf_find(struct lpfc_hba *phba, uint32_t tag)
{
struct lpfc_dmabuf *d_buf;
struct hbq_dmabuf *hbq_buf;
uint32_t hbqno;
hbqno = tag >> 16;
if (hbqno >= LPFC_MAX_HBQS)
return NULL;
list_for_each_entry(d_buf, &phba->hbqs[hbqno].hbq_buffer_list, list) {
hbq_buf = container_of(d_buf, struct hbq_dmabuf, dbuf);
if (hbq_buf->tag == tag) {
return hbq_buf;
}
}
lpfc_printf_log(phba, KERN_ERR, LOG_SLI | LOG_VPORT,
"1803 Bad hbq tag. Data: x%x x%x\n",
tag, phba->hbqs[tag >> 16].buffer_count);
return NULL;
}
/**
* lpfc_sli_free_hbq: Give back the hbq buffer to firmware.
* @phba: Pointer to HBA context object.
* @hbq_buffer: Pointer to HBQ buffer.
*
* This function is called with hbalock. This function gives back
* the hbq buffer to firmware. If the HBQ does not have space to
* post the buffer, it will free the buffer.
**/
void
lpfc_sli_free_hbq(struct lpfc_hba *phba, struct hbq_dmabuf *hbq_buffer)
{
uint32_t hbqno;
if (hbq_buffer) {
hbqno = hbq_buffer->tag >> 16;
if (!lpfc_sli_hbq_to_firmware(phba, hbqno, hbq_buffer)) {
(phba->hbqs[hbqno].hbq_free_buffer)(phba, hbq_buffer);
}
}
}
/**
* lpfc_sli_chk_mbx_command: Check if the mailbox is a legitimate mailbox.
* @mbxCommand: mailbox command code.
*
* This function is called by the mailbox event handler function to verify
* that the completed mailbox command is a legitimate mailbox command. If the
* completed mailbox is not known to the function, it will return MBX_SHUTDOWN
* and the mailbox event handler will take the HBA offline.
**/
static int
lpfc_sli_chk_mbx_command(uint8_t mbxCommand)
{
uint8_t ret;
switch (mbxCommand) {
case MBX_LOAD_SM:
case MBX_READ_NV:
case MBX_WRITE_NV:
case MBX_WRITE_VPARMS:
case MBX_RUN_BIU_DIAG:
case MBX_INIT_LINK:
case MBX_DOWN_LINK:
case MBX_CONFIG_LINK:
case MBX_CONFIG_RING:
case MBX_RESET_RING:
case MBX_READ_CONFIG:
case MBX_READ_RCONFIG:
case MBX_READ_SPARM:
case MBX_READ_STATUS:
case MBX_READ_RPI:
case MBX_READ_XRI:
case MBX_READ_REV:
case MBX_READ_LNK_STAT:
case MBX_REG_LOGIN:
case MBX_UNREG_LOGIN:
case MBX_READ_LA:
case MBX_CLEAR_LA:
case MBX_DUMP_MEMORY:
case MBX_DUMP_CONTEXT:
case MBX_RUN_DIAGS:
case MBX_RESTART:
case MBX_UPDATE_CFG:
case MBX_DOWN_LOAD:
case MBX_DEL_LD_ENTRY:
case MBX_RUN_PROGRAM:
case MBX_SET_MASK:
case MBX_SET_VARIABLE:
case MBX_UNREG_D_ID:
case MBX_KILL_BOARD:
case MBX_CONFIG_FARP:
case MBX_BEACON:
case MBX_LOAD_AREA:
case MBX_RUN_BIU_DIAG64:
case MBX_CONFIG_PORT:
case MBX_READ_SPARM64:
case MBX_READ_RPI64:
case MBX_REG_LOGIN64:
case MBX_READ_LA64:
case MBX_WRITE_WWN:
case MBX_SET_DEBUG:
case MBX_LOAD_EXP_ROM:
case MBX_ASYNCEVT_ENABLE:
case MBX_REG_VPI:
case MBX_UNREG_VPI:
case MBX_HEARTBEAT:
case MBX_PORT_CAPABILITIES:
case MBX_PORT_IOV_CONTROL:
ret = mbxCommand;
break;
default:
ret = MBX_SHUTDOWN;
break;
}
return ret;
}
/**
* lpfc_sli_wake_mbox_wait: Completion handler for mbox issued from
* lpfc_sli_issue_mbox_wait.
* @phba: Pointer to HBA context object.
* @pmboxq: Pointer to mailbox command.
*
* This is completion handler function for mailbox commands issued from
* lpfc_sli_issue_mbox_wait function. This function is called by the
* mailbox event handler function with no lock held. This function
* will wake up thread waiting on the wait queue pointed by context1
* of the mailbox.
**/
static void
lpfc_sli_wake_mbox_wait(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq)
{
wait_queue_head_t *pdone_q;
unsigned long drvr_flag;
/*
* If pdone_q is empty, the driver thread gave up waiting and
* continued running.
*/
pmboxq->mbox_flag |= LPFC_MBX_WAKE;
spin_lock_irqsave(&phba->hbalock, drvr_flag);
pdone_q = (wait_queue_head_t *) pmboxq->context1;
if (pdone_q)
wake_up_interruptible(pdone_q);
spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
return;
}
/**
* lpfc_sli_def_mbox_cmpl: Default mailbox completion handler.
* @phba: Pointer to HBA context object.
* @pmb: Pointer to mailbox object.
*
* This function is the default mailbox completion handler. It
* frees the memory resources associated with the completed mailbox
* command. If the completed command is a REG_LOGIN mailbox command,
* this function will issue a UREG_LOGIN to re-claim the RPI.
**/
void
lpfc_sli_def_mbox_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
struct lpfc_dmabuf *mp;
uint16_t rpi;
int rc;
mp = (struct lpfc_dmabuf *) (pmb->context1);
if (mp) {
lpfc_mbuf_free(phba, mp->virt, mp->phys);
kfree(mp);
}
/*
* If a REG_LOGIN succeeded after node is destroyed or node
* is in re-discovery driver need to cleanup the RPI.
*/
if (!(phba->pport->load_flag & FC_UNLOADING) &&
pmb->mb.mbxCommand == MBX_REG_LOGIN64 &&
!pmb->mb.mbxStatus) {
rpi = pmb->mb.un.varWords[0];
lpfc_unreg_login(phba, pmb->mb.un.varRegLogin.vpi, rpi, pmb);
pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
if (rc != MBX_NOT_FINISHED)
return;
}
mempool_free(pmb, phba->mbox_mem_pool);
return;
}
/**
* lpfc_sli_handle_mb_event: Handle mailbox completions from firmware.
* @phba: Pointer to HBA context object.
*
* This function is called with no lock held. This function processes all
* the completed mailbox commands and gives it to upper layers. The interrupt
* service routine processes mailbox completion interrupt and adds completed
* mailbox commands to the mboxq_cmpl queue and signals the worker thread.
* Worker thread call lpfc_sli_handle_mb_event, which will return the
* completed mailbox commands in mboxq_cmpl queue to the upper layers. This
* function returns the mailbox commands to the upper layer by calling the
* completion handler function of each mailbox.
**/
int
lpfc_sli_handle_mb_event(struct lpfc_hba *phba)
{
MAILBOX_t *pmbox;
LPFC_MBOXQ_t *pmb;
int rc;
LIST_HEAD(cmplq);
phba->sli.slistat.mbox_event++;
/* Get all completed mailboxe buffers into the cmplq */
spin_lock_irq(&phba->hbalock);
list_splice_init(&phba->sli.mboxq_cmpl, &cmplq);
spin_unlock_irq(&phba->hbalock);
/* Get a Mailbox buffer to setup mailbox commands for callback */
do {
list_remove_head(&cmplq, pmb, LPFC_MBOXQ_t, list);
if (pmb == NULL)
break;
pmbox = &pmb->mb;
if (pmbox->mbxCommand != MBX_HEARTBEAT) {
if (pmb->vport) {
lpfc_debugfs_disc_trc(pmb->vport,
LPFC_DISC_TRC_MBOX_VPORT,
"MBOX cmpl vport: cmd:x%x mb:x%x x%x",
(uint32_t)pmbox->mbxCommand,
pmbox->un.varWords[0],
pmbox->un.varWords[1]);
}
else {
lpfc_debugfs_disc_trc(phba->pport,
LPFC_DISC_TRC_MBOX,
"MBOX cmpl: cmd:x%x mb:x%x x%x",
(uint32_t)pmbox->mbxCommand,
pmbox->un.varWords[0],
pmbox->un.varWords[1]);
}
}
/*
* It is a fatal error if unknown mbox command completion.
*/
if (lpfc_sli_chk_mbx_command(pmbox->mbxCommand) ==
MBX_SHUTDOWN) {
/* Unknow mailbox command compl */
lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
"(%d):0323 Unknown Mailbox command "
"%x Cmpl\n",
pmb->vport ? pmb->vport->vpi : 0,
pmbox->mbxCommand);
phba->link_state = LPFC_HBA_ERROR;
phba->work_hs = HS_FFER3;
lpfc_handle_eratt(phba);
continue;
}
if (pmbox->mbxStatus) {
phba->sli.slistat.mbox_stat_err++;
if (pmbox->mbxStatus == MBXERR_NO_RESOURCES) {
/* Mbox cmd cmpl error - RETRYing */
lpfc_printf_log(phba, KERN_INFO,
LOG_MBOX | LOG_SLI,
"(%d):0305 Mbox cmd cmpl "
"error - RETRYing Data: x%x "
"x%x x%x x%x\n",
pmb->vport ? pmb->vport->vpi :0,
pmbox->mbxCommand,
pmbox->mbxStatus,
pmbox->un.varWords[0],
pmb->vport->port_state);
pmbox->mbxStatus = 0;
pmbox->mbxOwner = OWN_HOST;
spin_lock_irq(&phba->hbalock);
phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
spin_unlock_irq(&phba->hbalock);
rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
if (rc == MBX_SUCCESS)
continue;
}
}
/* Mailbox cmd <cmd> Cmpl <cmpl> */
lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI,
"(%d):0307 Mailbox cmd x%x Cmpl x%p "
"Data: x%x x%x x%x x%x x%x x%x x%x x%x x%x\n",
pmb->vport ? pmb->vport->vpi : 0,
pmbox->mbxCommand,
pmb->mbox_cmpl,
*((uint32_t *) pmbox),
pmbox->un.varWords[0],
pmbox->un.varWords[1],
pmbox->un.varWords[2],
pmbox->un.varWords[3],
pmbox->un.varWords[4],
pmbox->un.varWords[5],
pmbox->un.varWords[6],
pmbox->un.varWords[7]);
if (pmb->mbox_cmpl)
pmb->mbox_cmpl(phba,pmb);
} while (1);
return 0;
}
/**
* lpfc_sli_get_buff: Get the buffer associated with the buffer tag.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @tag: buffer tag.
*
* This function is called with no lock held. When QUE_BUFTAG_BIT bit
* is set in the tag the buffer is posted for a particular exchange,
* the function will return the buffer without replacing the buffer.
* If the buffer is for unsolicited ELS or CT traffic, this function
* returns the buffer and also posts another buffer to the firmware.
**/
static struct lpfc_dmabuf *
lpfc_sli_get_buff(struct lpfc_hba *phba,
struct lpfc_sli_ring *pring,
uint32_t tag)
{
struct hbq_dmabuf *hbq_entry;
if (tag & QUE_BUFTAG_BIT)
return lpfc_sli_ring_taggedbuf_get(phba, pring, tag);
hbq_entry = lpfc_sli_hbqbuf_find(phba, tag);
if (!hbq_entry)
return NULL;
return &hbq_entry->dbuf;
}
/**
* lpfc_sli_process_unsol_iocb: Unsolicited iocb handler.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @saveq: Pointer to the unsolicited iocb.
*
* This function is called with no lock held by the ring event handler
* when there is an unsolicited iocb posted to the response ring by the
* firmware. This function gets the buffer associated with the iocbs
* and calls the event handler for the ring. This function handles both
* qring buffers and hbq buffers.
* When the function returns 1 the caller can free the iocb object otherwise
* upper layer functions will free the iocb objects.
**/
static int
lpfc_sli_process_unsol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
struct lpfc_iocbq *saveq)
{
IOCB_t * irsp;
WORD5 * w5p;
uint32_t Rctl, Type;
uint32_t match, i;
struct lpfc_iocbq *iocbq;
struct lpfc_dmabuf *dmzbuf;
match = 0;
irsp = &(saveq->iocb);
if (irsp->ulpCommand == CMD_ASYNC_STATUS) {
if (pring->lpfc_sli_rcv_async_status)
pring->lpfc_sli_rcv_async_status(phba, pring, saveq);
else
lpfc_printf_log(phba,
KERN_WARNING,
LOG_SLI,
"0316 Ring %d handler: unexpected "
"ASYNC_STATUS iocb received evt_code "
"0x%x\n",
pring->ringno,
irsp->un.asyncstat.evt_code);
return 1;
}
if ((irsp->ulpCommand == CMD_IOCB_RET_XRI64_CX) &&
(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED)) {
if (irsp->ulpBdeCount > 0) {
dmzbuf = lpfc_sli_get_buff(phba, pring,
irsp->un.ulpWord[3]);
lpfc_in_buf_free(phba, dmzbuf);
}
if (irsp->ulpBdeCount > 1) {
dmzbuf = lpfc_sli_get_buff(phba, pring,
irsp->unsli3.sli3Words[3]);
lpfc_in_buf_free(phba, dmzbuf);
}
if (irsp->ulpBdeCount > 2) {
dmzbuf = lpfc_sli_get_buff(phba, pring,
irsp->unsli3.sli3Words[7]);
lpfc_in_buf_free(phba, dmzbuf);
}
return 1;
}
if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
if (irsp->ulpBdeCount != 0) {
saveq->context2 = lpfc_sli_get_buff(phba, pring,
irsp->un.ulpWord[3]);
if (!saveq->context2)
lpfc_printf_log(phba,
KERN_ERR,
LOG_SLI,
"0341 Ring %d Cannot find buffer for "
"an unsolicited iocb. tag 0x%x\n",
pring->ringno,
irsp->un.ulpWord[3]);
}
if (irsp->ulpBdeCount == 2) {
saveq->context3 = lpfc_sli_get_buff(phba, pring,
irsp->unsli3.sli3Words[7]);
if (!saveq->context3)
lpfc_printf_log(phba,
KERN_ERR,
LOG_SLI,
"0342 Ring %d Cannot find buffer for an"
" unsolicited iocb. tag 0x%x\n",
pring->ringno,
irsp->unsli3.sli3Words[7]);
}
list_for_each_entry(iocbq, &saveq->list, list) {
irsp = &(iocbq->iocb);
if (irsp->ulpBdeCount != 0) {
iocbq->context2 = lpfc_sli_get_buff(phba, pring,
irsp->un.ulpWord[3]);
if (!iocbq->context2)
lpfc_printf_log(phba,
KERN_ERR,
LOG_SLI,
"0343 Ring %d Cannot find "
"buffer for an unsolicited iocb"
". tag 0x%x\n", pring->ringno,
irsp->un.ulpWord[3]);
}
if (irsp->ulpBdeCount == 2) {
iocbq->context3 = lpfc_sli_get_buff(phba, pring,
irsp->unsli3.sli3Words[7]);
if (!iocbq->context3)
lpfc_printf_log(phba,
KERN_ERR,
LOG_SLI,
"0344 Ring %d Cannot find "
"buffer for an unsolicited "
"iocb. tag 0x%x\n",
pring->ringno,
irsp->unsli3.sli3Words[7]);
}
}
}
if (irsp->ulpBdeCount != 0 &&
(irsp->ulpCommand == CMD_IOCB_RCV_CONT64_CX ||
irsp->ulpStatus == IOSTAT_INTERMED_RSP)) {
int found = 0;
/* search continue save q for same XRI */
list_for_each_entry(iocbq, &pring->iocb_continue_saveq, clist) {
if (iocbq->iocb.ulpContext == saveq->iocb.ulpContext) {
list_add_tail(&saveq->list, &iocbq->list);
found = 1;
break;
}
}
if (!found)
list_add_tail(&saveq->clist,
&pring->iocb_continue_saveq);
if (saveq->iocb.ulpStatus != IOSTAT_INTERMED_RSP) {
list_del_init(&iocbq->clist);
saveq = iocbq;
irsp = &(saveq->iocb);
} else
return 0;
}
if ((irsp->ulpCommand == CMD_RCV_ELS_REQ64_CX) ||
(irsp->ulpCommand == CMD_RCV_ELS_REQ_CX) ||
(irsp->ulpCommand == CMD_IOCB_RCV_ELS64_CX)) {
Rctl = FC_ELS_REQ;
Type = FC_ELS_DATA;
} else {
w5p = (WORD5 *)&(saveq->iocb.un.ulpWord[5]);
Rctl = w5p->hcsw.Rctl;
Type = w5p->hcsw.Type;
/* Firmware Workaround */
if ((Rctl == 0) && (pring->ringno == LPFC_ELS_RING) &&
(irsp->ulpCommand == CMD_RCV_SEQUENCE64_CX ||
irsp->ulpCommand == CMD_IOCB_RCV_SEQ64_CX)) {
Rctl = FC_ELS_REQ;
Type = FC_ELS_DATA;
w5p->hcsw.Rctl = Rctl;
w5p->hcsw.Type = Type;
}
}
/* unSolicited Responses */
if (pring->prt[0].profile) {
if (pring->prt[0].lpfc_sli_rcv_unsol_event)
(pring->prt[0].lpfc_sli_rcv_unsol_event) (phba, pring,
saveq);
match = 1;
} else {
/* We must search, based on rctl / type
for the right routine */
for (i = 0; i < pring->num_mask; i++) {
if ((pring->prt[i].rctl == Rctl)
&& (pring->prt[i].type == Type)) {
if (pring->prt[i].lpfc_sli_rcv_unsol_event)
(pring->prt[i].lpfc_sli_rcv_unsol_event)
(phba, pring, saveq);
match = 1;
break;
}
}
}
if (match == 0) {
/* Unexpected Rctl / Type received */
/* Ring <ringno> handler: unexpected
Rctl <Rctl> Type <Type> received */
lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
"0313 Ring %d handler: unexpected Rctl x%x "
"Type x%x received\n",
pring->ringno, Rctl, Type);
}
return 1;
}
/**
* lpfc_sli_iocbq_lookup: Find command iocb for the given response iocb.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @prspiocb: Pointer to response iocb object.
*
* This function looks up the iocb_lookup table to get the command iocb
* corresponding to the given response iocb using the iotag of the
* response iocb. This function is called with the hbalock held.
* This function returns the command iocb object if it finds the command
* iocb else returns NULL.
**/
static struct lpfc_iocbq *
lpfc_sli_iocbq_lookup(struct lpfc_hba *phba,
struct lpfc_sli_ring *pring,
struct lpfc_iocbq *prspiocb)
{
struct lpfc_iocbq *cmd_iocb = NULL;
uint16_t iotag;
iotag = prspiocb->iocb.ulpIoTag;
if (iotag != 0 && iotag <= phba->sli.last_iotag) {
cmd_iocb = phba->sli.iocbq_lookup[iotag];
list_del_init(&cmd_iocb->list);
pring->txcmplq_cnt--;
return cmd_iocb;
}
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"0317 iotag x%x is out off "
"range: max iotag x%x wd0 x%x\n",
iotag, phba->sli.last_iotag,
*(((uint32_t *) &prspiocb->iocb) + 7));
return NULL;
}
/**
* lpfc_sli_process_sol_iocb: process solicited iocb completion.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @saveq: Pointer to the response iocb to be processed.
*
* This function is called by the ring event handler for non-fcp
* rings when there is a new response iocb in the response ring.
* The caller is not required to hold any locks. This function
* gets the command iocb associated with the response iocb and
* calls the completion handler for the command iocb. If there
* is no completion handler, the function will free the resources
* associated with command iocb. If the response iocb is for
* an already aborted command iocb, the status of the completion
* is changed to IOSTAT_LOCAL_REJECT/IOERR_SLI_ABORTED.
* This function always returns 1.
**/
static int
lpfc_sli_process_sol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
struct lpfc_iocbq *saveq)
{
struct lpfc_iocbq *cmdiocbp;
int rc = 1;
unsigned long iflag;
/* Based on the iotag field, get the cmd IOCB from the txcmplq */
spin_lock_irqsave(&phba->hbalock, iflag);
cmdiocbp = lpfc_sli_iocbq_lookup(phba, pring, saveq);
spin_unlock_irqrestore(&phba->hbalock, iflag);
if (cmdiocbp) {
if (cmdiocbp->iocb_cmpl) {
/*
* If an ELS command failed send an event to mgmt
* application.
*/
if (saveq->iocb.ulpStatus &&
(pring->ringno == LPFC_ELS_RING) &&
(cmdiocbp->iocb.ulpCommand ==
CMD_ELS_REQUEST64_CR))
lpfc_send_els_failure_event(phba,
cmdiocbp, saveq);
/*
* Post all ELS completions to the worker thread.
* All other are passed to the completion callback.
*/
if (pring->ringno == LPFC_ELS_RING) {
if (cmdiocbp->iocb_flag & LPFC_DRIVER_ABORTED) {
cmdiocbp->iocb_flag &=
~LPFC_DRIVER_ABORTED;
saveq->iocb.ulpStatus =
IOSTAT_LOCAL_REJECT;
saveq->iocb.un.ulpWord[4] =
IOERR_SLI_ABORTED;
/* Firmware could still be in progress
* of DMAing payload, so don't free data
* buffer till after a hbeat.
*/
saveq->iocb_flag |= LPFC_DELAY_MEM_FREE;
}
}
(cmdiocbp->iocb_cmpl) (phba, cmdiocbp, saveq);
} else
lpfc_sli_release_iocbq(phba, cmdiocbp);
} else {
/*
* Unknown initiating command based on the response iotag.
* This could be the case on the ELS ring because of
* lpfc_els_abort().
*/
if (pring->ringno != LPFC_ELS_RING) {
/*
* Ring <ringno> handler: unexpected completion IoTag
* <IoTag>
*/
lpfc_printf_vlog(cmdiocbp->vport, KERN_WARNING, LOG_SLI,
"0322 Ring %d handler: "
"unexpected completion IoTag x%x "
"Data: x%x x%x x%x x%x\n",
pring->ringno,
saveq->iocb.ulpIoTag,
saveq->iocb.ulpStatus,
saveq->iocb.un.ulpWord[4],
saveq->iocb.ulpCommand,
saveq->iocb.ulpContext);
}
}
return rc;
}
/**
* lpfc_sli_rsp_pointers_error: Response ring pointer error handler.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
*
* This function is called from the iocb ring event handlers when
* put pointer is ahead of the get pointer for a ring. This function signal
* an error attention condition to the worker thread and the worker
* thread will transition the HBA to offline state.
**/
static void
lpfc_sli_rsp_pointers_error(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
struct lpfc_pgp *pgp = &phba->port_gp[pring->ringno];
/*
* Ring <ringno> handler: portRspPut <portRspPut> is bigger than
* rsp ring <portRspMax>
*/
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"0312 Ring %d handler: portRspPut %d "
"is bigger than rsp ring %d\n",
pring->ringno, le32_to_cpu(pgp->rspPutInx),
pring->numRiocb);
phba->link_state = LPFC_HBA_ERROR;
/*
* All error attention handlers are posted to
* worker thread
*/
phba->work_ha |= HA_ERATT;
phba->work_hs = HS_FFER3;
lpfc_worker_wake_up(phba);
return;
}
/**
* lpfc_poll_eratt: Error attention polling timer timeout handler.
* @ptr: Pointer to address of HBA context object.
*
* This function is invoked by the Error Attention polling timer when the
* timer times out. It will check the SLI Error Attention register for
* possible attention events. If so, it will post an Error Attention event
* and wake up worker thread to process it. Otherwise, it will set up the
* Error Attention polling timer for the next poll.
**/
void lpfc_poll_eratt(unsigned long ptr)
{
struct lpfc_hba *phba;
uint32_t eratt = 0;
phba = (struct lpfc_hba *)ptr;
/* Check chip HA register for error event */
eratt = lpfc_sli_check_eratt(phba);
if (eratt)
/* Tell the worker thread there is work to do */
lpfc_worker_wake_up(phba);
else
/* Restart the timer for next eratt poll */
mod_timer(&phba->eratt_poll, jiffies +
HZ * LPFC_ERATT_POLL_INTERVAL);
return;
}
/**
* lpfc_sli_poll_fcp_ring: Handle FCP ring completion in polling mode.
* @phba: Pointer to HBA context object.
*
* This function is called from lpfc_queuecommand, lpfc_poll_timeout,
* lpfc_abort_handler and lpfc_slave_configure when FCP_RING_POLLING
* is enabled.
*
* The caller does not hold any lock.
* The function processes each response iocb in the response ring until it
* finds an iocb with LE bit set and chains all the iocbs upto the iocb with
* LE bit set. The function will call the completion handler of the command iocb
* if the response iocb indicates a completion for a command iocb or it is
* an abort completion.
**/
void lpfc_sli_poll_fcp_ring(struct lpfc_hba *phba)
{
struct lpfc_sli *psli = &phba->sli;
struct lpfc_sli_ring *pring = &psli->ring[LPFC_FCP_RING];
IOCB_t *irsp = NULL;
IOCB_t *entry = NULL;
struct lpfc_iocbq *cmdiocbq = NULL;
struct lpfc_iocbq rspiocbq;
struct lpfc_pgp *pgp = &phba->port_gp[pring->ringno];
uint32_t status;
uint32_t portRspPut, portRspMax;
int type;
uint32_t rsp_cmpl = 0;
uint32_t ha_copy;
unsigned long iflags;
pring->stats.iocb_event++;
/*
* The next available response entry should never exceed the maximum
* entries. If it does, treat it as an adapter hardware error.
*/
portRspMax = pring->numRiocb;
portRspPut = le32_to_cpu(pgp->rspPutInx);
if (unlikely(portRspPut >= portRspMax)) {
lpfc_sli_rsp_pointers_error(phba, pring);
return;
}
rmb();
while (pring->rspidx != portRspPut) {
entry = lpfc_resp_iocb(phba, pring);
if (++pring->rspidx >= portRspMax)
pring->rspidx = 0;
lpfc_sli_pcimem_bcopy((uint32_t *) entry,
(uint32_t *) &rspiocbq.iocb,
phba->iocb_rsp_size);
irsp = &rspiocbq.iocb;
type = lpfc_sli_iocb_cmd_type(irsp->ulpCommand & CMD_IOCB_MASK);
pring->stats.iocb_rsp++;
rsp_cmpl++;
if (unlikely(irsp->ulpStatus)) {
/* Rsp ring <ringno> error: IOCB */
lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
"0326 Rsp Ring %d error: IOCB Data: "
"x%x x%x x%x x%x x%x x%x x%x x%x\n",
pring->ringno,
irsp->un.ulpWord[0],
irsp->un.ulpWord[1],
irsp->un.ulpWord[2],
irsp->un.ulpWord[3],
irsp->un.ulpWord[4],
irsp->un.ulpWord[5],
*(uint32_t *)&irsp->un1,
*((uint32_t *)&irsp->un1 + 1));
}
switch (type) {
case LPFC_ABORT_IOCB:
case LPFC_SOL_IOCB:
/*
* Idle exchange closed via ABTS from port. No iocb
* resources need to be recovered.
*/
if (unlikely(irsp->ulpCommand == CMD_XRI_ABORTED_CX)) {
lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
"0314 IOCB cmd 0x%x "
"processed. Skipping "
"completion",
irsp->ulpCommand);
break;
}
spin_lock_irqsave(&phba->hbalock, iflags);
cmdiocbq = lpfc_sli_iocbq_lookup(phba, pring,
&rspiocbq);
spin_unlock_irqrestore(&phba->hbalock, iflags);
if ((cmdiocbq) && (cmdiocbq->iocb_cmpl)) {
(cmdiocbq->iocb_cmpl)(phba, cmdiocbq,
&rspiocbq);
}
break;
default:
if (irsp->ulpCommand == CMD_ADAPTER_MSG) {
char adaptermsg[LPFC_MAX_ADPTMSG];
memset(adaptermsg, 0, LPFC_MAX_ADPTMSG);
memcpy(&adaptermsg[0], (uint8_t *) irsp,
MAX_MSG_DATA);
dev_warn(&((phba->pcidev)->dev),
"lpfc%d: %s\n",
phba->brd_no, adaptermsg);
} else {
/* Unknown IOCB command */
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"0321 Unknown IOCB command "
"Data: x%x, x%x x%x x%x x%x\n",
type, irsp->ulpCommand,
irsp->ulpStatus,
irsp->ulpIoTag,
irsp->ulpContext);
}
break;
}
/*
* The response IOCB has been processed. Update the ring
* pointer in SLIM. If the port response put pointer has not
* been updated, sync the pgp->rspPutInx and fetch the new port
* response put pointer.
*/
writel(pring->rspidx, &phba->host_gp[pring->ringno].rspGetInx);
if (pring->rspidx == portRspPut)
portRspPut = le32_to_cpu(pgp->rspPutInx);
}
ha_copy = readl(phba->HAregaddr);
ha_copy >>= (LPFC_FCP_RING * 4);
if ((rsp_cmpl > 0) && (ha_copy & HA_R0RE_REQ)) {
spin_lock_irqsave(&phba->hbalock, iflags);
pring->stats.iocb_rsp_full++;
status = ((CA_R0ATT | CA_R0RE_RSP) << (LPFC_FCP_RING * 4));
writel(status, phba->CAregaddr);
readl(phba->CAregaddr);
spin_unlock_irqrestore(&phba->hbalock, iflags);
}
if ((ha_copy & HA_R0CE_RSP) &&
(pring->flag & LPFC_CALL_RING_AVAILABLE)) {
spin_lock_irqsave(&phba->hbalock, iflags);
pring->flag &= ~LPFC_CALL_RING_AVAILABLE;
pring->stats.iocb_cmd_empty++;
/* Force update of the local copy of cmdGetInx */
pring->local_getidx = le32_to_cpu(pgp->cmdGetInx);
lpfc_sli_resume_iocb(phba, pring);
if ((pring->lpfc_sli_cmd_available))
(pring->lpfc_sli_cmd_available) (phba, pring);
spin_unlock_irqrestore(&phba->hbalock, iflags);
}
return;
}
/**
* lpfc_sli_handle_fast_ring_event: Handle ring events on FCP ring.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @mask: Host attention register mask for this ring.
*
* This function is called from the interrupt context when there is a ring
* event for the fcp ring. The caller does not hold any lock.
* The function processes each response iocb in the response ring until it
* finds an iocb with LE bit set and chains all the iocbs upto the iocb with
* LE bit set. The function will call the completion handler of the command iocb
* if the response iocb indicates a completion for a command iocb or it is
* an abort completion. The function will call lpfc_sli_process_unsol_iocb
* function if this is an unsolicited iocb.
* This routine presumes LPFC_FCP_RING handling and doesn't bother
* to check it explicitly. This function always returns 1.
**/
static int
lpfc_sli_handle_fast_ring_event(struct lpfc_hba *phba,
struct lpfc_sli_ring *pring, uint32_t mask)
{
struct lpfc_pgp *pgp = &phba->port_gp[pring->ringno];
IOCB_t *irsp = NULL;
IOCB_t *entry = NULL;
struct lpfc_iocbq *cmdiocbq = NULL;
struct lpfc_iocbq rspiocbq;
uint32_t status;
uint32_t portRspPut, portRspMax;
int rc = 1;
lpfc_iocb_type type;
unsigned long iflag;
uint32_t rsp_cmpl = 0;
spin_lock_irqsave(&phba->hbalock, iflag);
pring->stats.iocb_event++;
/*
* The next available response entry should never exceed the maximum
* entries. If it does, treat it as an adapter hardware error.
*/
portRspMax = pring->numRiocb;
portRspPut = le32_to_cpu(pgp->rspPutInx);
if (unlikely(portRspPut >= portRspMax)) {
lpfc_sli_rsp_pointers_error(phba, pring);
spin_unlock_irqrestore(&phba->hbalock, iflag);
return 1;
}
rmb();
while (pring->rspidx != portRspPut) {
/*
* Fetch an entry off the ring and copy it into a local data
* structure. The copy involves a byte-swap since the
* network byte order and pci byte orders are different.
*/
entry = lpfc_resp_iocb(phba, pring);
phba->last_completion_time = jiffies;
if (++pring->rspidx >= portRspMax)
pring->rspidx = 0;
lpfc_sli_pcimem_bcopy((uint32_t *) entry,
(uint32_t *) &rspiocbq.iocb,
phba->iocb_rsp_size);
INIT_LIST_HEAD(&(rspiocbq.list));
irsp = &rspiocbq.iocb;
type = lpfc_sli_iocb_cmd_type(irsp->ulpCommand & CMD_IOCB_MASK);
pring->stats.iocb_rsp++;
rsp_cmpl++;
if (unlikely(irsp->ulpStatus)) {
/*
* If resource errors reported from HBA, reduce
* queuedepths of the SCSI device.
*/
if ((irsp->ulpStatus == IOSTAT_LOCAL_REJECT) &&
(irsp->un.ulpWord[4] == IOERR_NO_RESOURCES)) {
spin_unlock_irqrestore(&phba->hbalock, iflag);
lpfc_rampdown_queue_depth(phba);
spin_lock_irqsave(&phba->hbalock, iflag);
}
/* Rsp ring <ringno> error: IOCB */
lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
"0336 Rsp Ring %d error: IOCB Data: "
"x%x x%x x%x x%x x%x x%x x%x x%x\n",
pring->ringno,
irsp->un.ulpWord[0],
irsp->un.ulpWord[1],
irsp->un.ulpWord[2],
irsp->un.ulpWord[3],
irsp->un.ulpWord[4],
irsp->un.ulpWord[5],
*(uint32_t *)&irsp->un1,
*((uint32_t *)&irsp->un1 + 1));
}
switch (type) {
case LPFC_ABORT_IOCB:
case LPFC_SOL_IOCB:
/*
* Idle exchange closed via ABTS from port. No iocb
* resources need to be recovered.
*/
if (unlikely(irsp->ulpCommand == CMD_XRI_ABORTED_CX)) {
lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
"0333 IOCB cmd 0x%x"
" processed. Skipping"
" completion\n",
irsp->ulpCommand);
break;
}
cmdiocbq = lpfc_sli_iocbq_lookup(phba, pring,
&rspiocbq);
if ((cmdiocbq) && (cmdiocbq->iocb_cmpl)) {
if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
(cmdiocbq->iocb_cmpl)(phba, cmdiocbq,
&rspiocbq);
} else {
spin_unlock_irqrestore(&phba->hbalock,
iflag);
(cmdiocbq->iocb_cmpl)(phba, cmdiocbq,
&rspiocbq);
spin_lock_irqsave(&phba->hbalock,
iflag);
}
}
break;
case LPFC_UNSOL_IOCB:
spin_unlock_irqrestore(&phba->hbalock, iflag);
lpfc_sli_process_unsol_iocb(phba, pring, &rspiocbq);
spin_lock_irqsave(&phba->hbalock, iflag);
break;
default:
if (irsp->ulpCommand == CMD_ADAPTER_MSG) {
char adaptermsg[LPFC_MAX_ADPTMSG];
memset(adaptermsg, 0, LPFC_MAX_ADPTMSG);
memcpy(&adaptermsg[0], (uint8_t *) irsp,
MAX_MSG_DATA);
dev_warn(&((phba->pcidev)->dev),
"lpfc%d: %s\n",
phba->brd_no, adaptermsg);
} else {
/* Unknown IOCB command */
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"0334 Unknown IOCB command "
"Data: x%x, x%x x%x x%x x%x\n",
type, irsp->ulpCommand,
irsp->ulpStatus,
irsp->ulpIoTag,
irsp->ulpContext);
}
break;
}
/*
* The response IOCB has been processed. Update the ring
* pointer in SLIM. If the port response put pointer has not
* been updated, sync the pgp->rspPutInx and fetch the new port
* response put pointer.
*/
writel(pring->rspidx, &phba->host_gp[pring->ringno].rspGetInx);
if (pring->rspidx == portRspPut)
portRspPut = le32_to_cpu(pgp->rspPutInx);
}
if ((rsp_cmpl > 0) && (mask & HA_R0RE_REQ)) {
pring->stats.iocb_rsp_full++;
status = ((CA_R0ATT | CA_R0RE_RSP) << (pring->ringno * 4));
writel(status, phba->CAregaddr);
readl(phba->CAregaddr);
}
if ((mask & HA_R0CE_RSP) && (pring->flag & LPFC_CALL_RING_AVAILABLE)) {
pring->flag &= ~LPFC_CALL_RING_AVAILABLE;
pring->stats.iocb_cmd_empty++;
/* Force update of the local copy of cmdGetInx */
pring->local_getidx = le32_to_cpu(pgp->cmdGetInx);
lpfc_sli_resume_iocb(phba, pring);
if ((pring->lpfc_sli_cmd_available))
(pring->lpfc_sli_cmd_available) (phba, pring);
}
spin_unlock_irqrestore(&phba->hbalock, iflag);
return rc;
}
/**
* lpfc_sli_handle_slow_ring_event: Handle ring events for non-FCP rings.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @mask: Host attention register mask for this ring.
*
* This function is called from the worker thread when there is a ring
* event for non-fcp rings. The caller does not hold any lock .
* The function processes each response iocb in the response ring until it
* finds an iocb with LE bit set and chains all the iocbs upto the iocb with
* LE bit set. The function will call lpfc_sli_process_sol_iocb function if the
* response iocb indicates a completion of a command iocb. The function
* will call lpfc_sli_process_unsol_iocb function if this is an unsolicited
* iocb. The function frees the resources or calls the completion handler if
* this iocb is an abort completion. The function returns 0 when the allocated
* iocbs are not freed, otherwise returns 1.
**/
int
lpfc_sli_handle_slow_ring_event(struct lpfc_hba *phba,
struct lpfc_sli_ring *pring, uint32_t mask)
{
struct lpfc_pgp *pgp;
IOCB_t *entry;
IOCB_t *irsp = NULL;
struct lpfc_iocbq *rspiocbp = NULL;
struct lpfc_iocbq *next_iocb;
struct lpfc_iocbq *cmdiocbp;
struct lpfc_iocbq *saveq;
uint8_t iocb_cmd_type;
lpfc_iocb_type type;
uint32_t status, free_saveq;
uint32_t portRspPut, portRspMax;
int rc = 1;
unsigned long iflag;
pgp = &phba->port_gp[pring->ringno];
spin_lock_irqsave(&phba->hbalock, iflag);
pring->stats.iocb_event++;
/*
* The next available response entry should never exceed the maximum
* entries. If it does, treat it as an adapter hardware error.
*/
portRspMax = pring->numRiocb;
portRspPut = le32_to_cpu(pgp->rspPutInx);
if (portRspPut >= portRspMax) {
/*
* Ring <ringno> handler: portRspPut <portRspPut> is bigger than
* rsp ring <portRspMax>
*/
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"0303 Ring %d handler: portRspPut %d "
"is bigger than rsp ring %d\n",
pring->ringno, portRspPut, portRspMax);
phba->link_state = LPFC_HBA_ERROR;
spin_unlock_irqrestore(&phba->hbalock, iflag);
phba->work_hs = HS_FFER3;
lpfc_handle_eratt(phba);
return 1;
}
rmb();
while (pring->rspidx != portRspPut) {
/*
* Build a completion list and call the appropriate handler.
* The process is to get the next available response iocb, get
* a free iocb from the list, copy the response data into the
* free iocb, insert to the continuation list, and update the
* next response index to slim. This process makes response
* iocb's in the ring available to DMA as fast as possible but
* pays a penalty for a copy operation. Since the iocb is
* only 32 bytes, this penalty is considered small relative to
* the PCI reads for register values and a slim write. When
* the ulpLe field is set, the entire Command has been
* received.
*/
entry = lpfc_resp_iocb(phba, pring);
phba->last_completion_time = jiffies;
rspiocbp = __lpfc_sli_get_iocbq(phba);
if (rspiocbp == NULL) {
printk(KERN_ERR "%s: out of buffers! Failing "
"completion.\n", __func__);
break;
}
lpfc_sli_pcimem_bcopy(entry, &rspiocbp->iocb,
phba->iocb_rsp_size);
irsp = &rspiocbp->iocb;
if (++pring->rspidx >= portRspMax)
pring->rspidx = 0;
if (pring->ringno == LPFC_ELS_RING) {
lpfc_debugfs_slow_ring_trc(phba,
"IOCB rsp ring: wd4:x%08x wd6:x%08x wd7:x%08x",
*(((uint32_t *) irsp) + 4),
*(((uint32_t *) irsp) + 6),
*(((uint32_t *) irsp) + 7));
}
writel(pring->rspidx, &phba->host_gp[pring->ringno].rspGetInx);
list_add_tail(&rspiocbp->list, &(pring->iocb_continueq));
pring->iocb_continueq_cnt++;
if (irsp->ulpLe) {
/*
* By default, the driver expects to free all resources
* associated with this iocb completion.
*/
free_saveq = 1;
saveq = list_get_first(&pring->iocb_continueq,
struct lpfc_iocbq, list);
irsp = &(saveq->iocb);
list_del_init(&pring->iocb_continueq);
pring->iocb_continueq_cnt = 0;
pring->stats.iocb_rsp++;
/*
* If resource errors reported from HBA, reduce
* queuedepths of the SCSI device.
*/
if ((irsp->ulpStatus == IOSTAT_LOCAL_REJECT) &&
(irsp->un.ulpWord[4] == IOERR_NO_RESOURCES)) {
spin_unlock_irqrestore(&phba->hbalock, iflag);
lpfc_rampdown_queue_depth(phba);
spin_lock_irqsave(&phba->hbalock, iflag);
}
if (irsp->ulpStatus) {
/* Rsp ring <ringno> error: IOCB */
lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
"0328 Rsp Ring %d error: "
"IOCB Data: "
"x%x x%x x%x x%x "
"x%x x%x x%x x%x "
"x%x x%x x%x x%x "
"x%x x%x x%x x%x\n",
pring->ringno,
irsp->un.ulpWord[0],
irsp->un.ulpWord[1],
irsp->un.ulpWord[2],
irsp->un.ulpWord[3],
irsp->un.ulpWord[4],
irsp->un.ulpWord[5],
*(((uint32_t *) irsp) + 6),
*(((uint32_t *) irsp) + 7),
*(((uint32_t *) irsp) + 8),
*(((uint32_t *) irsp) + 9),
*(((uint32_t *) irsp) + 10),
*(((uint32_t *) irsp) + 11),
*(((uint32_t *) irsp) + 12),
*(((uint32_t *) irsp) + 13),
*(((uint32_t *) irsp) + 14),
*(((uint32_t *) irsp) + 15));
}
/*
* Fetch the IOCB command type and call the correct
* completion routine. Solicited and Unsolicited
* IOCBs on the ELS ring get freed back to the
* lpfc_iocb_list by the discovery kernel thread.
*/
iocb_cmd_type = irsp->ulpCommand & CMD_IOCB_MASK;
type = lpfc_sli_iocb_cmd_type(iocb_cmd_type);
if (type == LPFC_SOL_IOCB) {
spin_unlock_irqrestore(&phba->hbalock, iflag);
rc = lpfc_sli_process_sol_iocb(phba, pring,
saveq);
spin_lock_irqsave(&phba->hbalock, iflag);
} else if (type == LPFC_UNSOL_IOCB) {
spin_unlock_irqrestore(&phba->hbalock, iflag);
rc = lpfc_sli_process_unsol_iocb(phba, pring,
saveq);
spin_lock_irqsave(&phba->hbalock, iflag);
if (!rc)
free_saveq = 0;
} else if (type == LPFC_ABORT_IOCB) {
if ((irsp->ulpCommand != CMD_XRI_ABORTED_CX) &&
((cmdiocbp =
lpfc_sli_iocbq_lookup(phba, pring,
saveq)))) {
/* Call the specified completion
routine */
if (cmdiocbp->iocb_cmpl) {
spin_unlock_irqrestore(
&phba->hbalock,
iflag);
(cmdiocbp->iocb_cmpl) (phba,
cmdiocbp, saveq);
spin_lock_irqsave(
&phba->hbalock,
iflag);
} else
__lpfc_sli_release_iocbq(phba,
cmdiocbp);
}
} else if (type == LPFC_UNKNOWN_IOCB) {
if (irsp->ulpCommand == CMD_ADAPTER_MSG) {
char adaptermsg[LPFC_MAX_ADPTMSG];
memset(adaptermsg, 0,
LPFC_MAX_ADPTMSG);
memcpy(&adaptermsg[0], (uint8_t *) irsp,
MAX_MSG_DATA);
dev_warn(&((phba->pcidev)->dev),
"lpfc%d: %s\n",
phba->brd_no, adaptermsg);
} else {
/* Unknown IOCB command */
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"0335 Unknown IOCB "
"command Data: x%x "
"x%x x%x x%x\n",
irsp->ulpCommand,
irsp->ulpStatus,
irsp->ulpIoTag,
irsp->ulpContext);
}
}
if (free_saveq) {
list_for_each_entry_safe(rspiocbp, next_iocb,
&saveq->list, list) {
list_del(&rspiocbp->list);
__lpfc_sli_release_iocbq(phba,
rspiocbp);
}
__lpfc_sli_release_iocbq(phba, saveq);
}
rspiocbp = NULL;
}
/*
* If the port response put pointer has not been updated, sync
* the pgp->rspPutInx in the MAILBOX_tand fetch the new port
* response put pointer.
*/
if (pring->rspidx == portRspPut) {
portRspPut = le32_to_cpu(pgp->rspPutInx);
}
} /* while (pring->rspidx != portRspPut) */
if ((rspiocbp != NULL) && (mask & HA_R0RE_REQ)) {
/* At least one response entry has been freed */
pring->stats.iocb_rsp_full++;
/* SET RxRE_RSP in Chip Att register */
status = ((CA_R0ATT | CA_R0RE_RSP) << (pring->ringno * 4));
writel(status, phba->CAregaddr);
readl(phba->CAregaddr); /* flush */
}
if ((mask & HA_R0CE_RSP) && (pring->flag & LPFC_CALL_RING_AVAILABLE)) {
pring->flag &= ~LPFC_CALL_RING_AVAILABLE;
pring->stats.iocb_cmd_empty++;
/* Force update of the local copy of cmdGetInx */
pring->local_getidx = le32_to_cpu(pgp->cmdGetInx);
lpfc_sli_resume_iocb(phba, pring);
if ((pring->lpfc_sli_cmd_available))
(pring->lpfc_sli_cmd_available) (phba, pring);
}
spin_unlock_irqrestore(&phba->hbalock, iflag);
return rc;
}
/**
* lpfc_sli_abort_iocb_ring: Abort all iocbs in the ring.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
*
* This function aborts all iocbs in the given ring and frees all the iocb
* objects in txq. This function issues an abort iocb for all the iocb commands
* in txcmplq. The iocbs in the txcmplq is not guaranteed to complete before
* the return of this function. The caller is not required to hold any locks.
**/
void
lpfc_sli_abort_iocb_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
LIST_HEAD(completions);
struct lpfc_iocbq *iocb, *next_iocb;
IOCB_t *cmd = NULL;
if (pring->ringno == LPFC_ELS_RING) {
lpfc_fabric_abort_hba(phba);
}
/* Error everything on txq and txcmplq
* First do the txq.
*/
spin_lock_irq(&phba->hbalock);
list_splice_init(&pring->txq, &completions);
pring->txq_cnt = 0;
/* Next issue ABTS for everything on the txcmplq */
list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list)
lpfc_sli_issue_abort_iotag(phba, pring, iocb);
spin_unlock_irq(&phba->hbalock);
while (!list_empty(&completions)) {
iocb = list_get_first(&completions, struct lpfc_iocbq, list);
cmd = &iocb->iocb;
list_del_init(&iocb->list);
if (!iocb->iocb_cmpl)
lpfc_sli_release_iocbq(phba, iocb);
else {
cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
(iocb->iocb_cmpl) (phba, iocb, iocb);
}
}
}
/**
* lpfc_sli_flush_fcp_rings: flush all iocbs in the fcp ring.
* @phba: Pointer to HBA context object.
*
* This function flushes all iocbs in the fcp ring and frees all the iocb
* objects in txq and txcmplq. This function will not issue abort iocbs
* for all the iocb commands in txcmplq, they will just be returned with
* IOERR_SLI_DOWN. This function is invoked with EEH when device's PCI
* slot has been permanently disabled.
**/
void
lpfc_sli_flush_fcp_rings(struct lpfc_hba *phba)
{
LIST_HEAD(txq);
LIST_HEAD(txcmplq);
struct lpfc_iocbq *iocb;
IOCB_t *cmd = NULL;
struct lpfc_sli *psli = &phba->sli;
struct lpfc_sli_ring *pring;
/* Currently, only one fcp ring */
pring = &psli->ring[psli->fcp_ring];
spin_lock_irq(&phba->hbalock);
/* Retrieve everything on txq */
list_splice_init(&pring->txq, &txq);
pring->txq_cnt = 0;
/* Retrieve everything on the txcmplq */
list_splice_init(&pring->txcmplq, &txcmplq);
pring->txcmplq_cnt = 0;
spin_unlock_irq(&phba->hbalock);
/* Flush the txq */
while (!list_empty(&txq)) {
iocb = list_get_first(&txq, struct lpfc_iocbq, list);
cmd = &iocb->iocb;
list_del_init(&iocb->list);
if (!iocb->iocb_cmpl)
lpfc_sli_release_iocbq(phba, iocb);
else {
cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
cmd->un.ulpWord[4] = IOERR_SLI_DOWN;
(iocb->iocb_cmpl) (phba, iocb, iocb);
}
}
/* Flush the txcmpq */
while (!list_empty(&txcmplq)) {
iocb = list_get_first(&txcmplq, struct lpfc_iocbq, list);
cmd = &iocb->iocb;
list_del_init(&iocb->list);
if (!iocb->iocb_cmpl)
lpfc_sli_release_iocbq(phba, iocb);
else {
cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
cmd->un.ulpWord[4] = IOERR_SLI_DOWN;
(iocb->iocb_cmpl) (phba, iocb, iocb);
}
}
}
/**
* lpfc_sli_brdready: Check for host status bits.
* @phba: Pointer to HBA context object.
* @mask: Bit mask to be checked.
*
* This function reads the host status register and compares
* with the provided bit mask to check if HBA completed
* the restart. This function will wait in a loop for the
* HBA to complete restart. If the HBA does not restart within
* 15 iterations, the function will reset the HBA again. The
* function returns 1 when HBA fail to restart otherwise returns
* zero.
**/
int
lpfc_sli_brdready(struct lpfc_hba *phba, uint32_t mask)
{
uint32_t status;
int i = 0;
int retval = 0;
/* Read the HBA Host Status Register */
status = readl(phba->HSregaddr);
/*
* Check status register every 100ms for 5 retries, then every
* 500ms for 5, then every 2.5 sec for 5, then reset board and
* every 2.5 sec for 4.
* Break our of the loop if errors occurred during init.
*/
while (((status & mask) != mask) &&
!(status & HS_FFERM) &&
i++ < 20) {
if (i <= 5)
msleep(10);
else if (i <= 10)
msleep(500);
else
msleep(2500);
if (i == 15) {
/* Do post */
phba->pport->port_state = LPFC_VPORT_UNKNOWN;
lpfc_sli_brdrestart(phba);
}
/* Read the HBA Host Status Register */
status = readl(phba->HSregaddr);
}
/* Check to see if any errors occurred during init */
if ((status & HS_FFERM) || (i >= 20)) {
phba->link_state = LPFC_HBA_ERROR;
retval = 1;
}
return retval;
}
#define BARRIER_TEST_PATTERN (0xdeadbeef)
/**
* lpfc_reset_barrier: Make HBA ready for HBA reset.
* @phba: Pointer to HBA context object.
*
* This function is called before resetting an HBA. This
* function requests HBA to quiesce DMAs before a reset.
**/
void lpfc_reset_barrier(struct lpfc_hba *phba)
{
uint32_t __iomem *resp_buf;
uint32_t __iomem *mbox_buf;
volatile uint32_t mbox;
uint32_t hc_copy;
int i;
uint8_t hdrtype;
pci_read_config_byte(phba->pcidev, PCI_HEADER_TYPE, &hdrtype);
if (hdrtype != 0x80 ||
(FC_JEDEC_ID(phba->vpd.rev.biuRev) != HELIOS_JEDEC_ID &&
FC_JEDEC_ID(phba->vpd.rev.biuRev) != THOR_JEDEC_ID))
return;
/*
* Tell the other part of the chip to suspend temporarily all
* its DMA activity.
*/
resp_buf = phba->MBslimaddr;
/* Disable the error attention */
hc_copy = readl(phba->HCregaddr);
writel((hc_copy & ~HC_ERINT_ENA), phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
phba->link_flag |= LS_IGNORE_ERATT;
if (readl(phba->HAregaddr) & HA_ERATT) {
/* Clear Chip error bit */
writel(HA_ERATT, phba->HAregaddr);
phba->pport->stopped = 1;
}
mbox = 0;
((MAILBOX_t *)&mbox)->mbxCommand = MBX_KILL_BOARD;
((MAILBOX_t *)&mbox)->mbxOwner = OWN_CHIP;
writel(BARRIER_TEST_PATTERN, (resp_buf + 1));
mbox_buf = phba->MBslimaddr;
writel(mbox, mbox_buf);
for (i = 0;
readl(resp_buf + 1) != ~(BARRIER_TEST_PATTERN) && i < 50; i++)
mdelay(1);
if (readl(resp_buf + 1) != ~(BARRIER_TEST_PATTERN)) {
if (phba->sli.sli_flag & LPFC_SLI2_ACTIVE ||
phba->pport->stopped)
goto restore_hc;
else
goto clear_errat;
}
((MAILBOX_t *)&mbox)->mbxOwner = OWN_HOST;
for (i = 0; readl(resp_buf) != mbox && i < 500; i++)
mdelay(1);
clear_errat:
while (!(readl(phba->HAregaddr) & HA_ERATT) && ++i < 500)
mdelay(1);
if (readl(phba->HAregaddr) & HA_ERATT) {
writel(HA_ERATT, phba->HAregaddr);
phba->pport->stopped = 1;
}
restore_hc:
phba->link_flag &= ~LS_IGNORE_ERATT;
writel(hc_copy, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
}
/**
* lpfc_sli_brdkill: Issue a kill_board mailbox command.
* @phba: Pointer to HBA context object.
*
* This function issues a kill_board mailbox command and waits for
* the error attention interrupt. This function is called for stopping
* the firmware processing. The caller is not required to hold any
* locks. This function calls lpfc_hba_down_post function to free
* any pending commands after the kill. The function will return 1 when it
* fails to kill the board else will return 0.
**/
int
lpfc_sli_brdkill(struct lpfc_hba *phba)
{
struct lpfc_sli *psli;
LPFC_MBOXQ_t *pmb;
uint32_t status;
uint32_t ha_copy;
int retval;
int i = 0;
psli = &phba->sli;
/* Kill HBA */
lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
"0329 Kill HBA Data: x%x x%x\n",
phba->pport->port_state, psli->sli_flag);
pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!pmb)
return 1;
/* Disable the error attention */
spin_lock_irq(&phba->hbalock);
status = readl(phba->HCregaddr);
status &= ~HC_ERINT_ENA;
writel(status, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
phba->link_flag |= LS_IGNORE_ERATT;
spin_unlock_irq(&phba->hbalock);
lpfc_kill_board(phba, pmb);
pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
retval = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
if (retval != MBX_SUCCESS) {
if (retval != MBX_BUSY)
mempool_free(pmb, phba->mbox_mem_pool);
spin_lock_irq(&phba->hbalock);
phba->link_flag &= ~LS_IGNORE_ERATT;
spin_unlock_irq(&phba->hbalock);
return 1;
}
psli->sli_flag &= ~LPFC_SLI2_ACTIVE;
mempool_free(pmb, phba->mbox_mem_pool);
/* There is no completion for a KILL_BOARD mbox cmd. Check for an error
* attention every 100ms for 3 seconds. If we don't get ERATT after
* 3 seconds we still set HBA_ERROR state because the status of the
* board is now undefined.
*/
ha_copy = readl(phba->HAregaddr);
while ((i++ < 30) && !(ha_copy & HA_ERATT)) {
mdelay(100);
ha_copy = readl(phba->HAregaddr);
}
del_timer_sync(&psli->mbox_tmo);
if (ha_copy & HA_ERATT) {
writel(HA_ERATT, phba->HAregaddr);
phba->pport->stopped = 1;
}
spin_lock_irq(&phba->hbalock);
psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
phba->link_flag &= ~LS_IGNORE_ERATT;
spin_unlock_irq(&phba->hbalock);
psli->mbox_active = NULL;
lpfc_hba_down_post(phba);
phba->link_state = LPFC_HBA_ERROR;
return ha_copy & HA_ERATT ? 0 : 1;
}
/**
* lpfc_sli_brdreset: Reset the HBA.
* @phba: Pointer to HBA context object.
*
* This function resets the HBA by writing HC_INITFF to the control
* register. After the HBA resets, this function resets all the iocb ring
* indices. This function disables PCI layer parity checking during
* the reset.
* This function returns 0 always.
* The caller is not required to hold any locks.
**/
int
lpfc_sli_brdreset(struct lpfc_hba *phba)
{
struct lpfc_sli *psli;
struct lpfc_sli_ring *pring;
uint16_t cfg_value;
int i;
psli = &phba->sli;
/* Reset HBA */
lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
"0325 Reset HBA Data: x%x x%x\n",
phba->pport->port_state, psli->sli_flag);
/* perform board reset */
phba->fc_eventTag = 0;
phba->pport->fc_myDID = 0;
phba->pport->fc_prevDID = 0;
/* Turn off parity checking and serr during the physical reset */
pci_read_config_word(phba->pcidev, PCI_COMMAND, &cfg_value);
pci_write_config_word(phba->pcidev, PCI_COMMAND,
(cfg_value &
~(PCI_COMMAND_PARITY | PCI_COMMAND_SERR)));
psli->sli_flag &= ~(LPFC_SLI2_ACTIVE | LPFC_PROCESS_LA);
/* Now toggle INITFF bit in the Host Control Register */
writel(HC_INITFF, phba->HCregaddr);
mdelay(1);
readl(phba->HCregaddr); /* flush */
writel(0, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
/* Restore PCI cmd register */
pci_write_config_word(phba->pcidev, PCI_COMMAND, cfg_value);
/* Initialize relevant SLI info */
for (i = 0; i < psli->num_rings; i++) {
pring = &psli->ring[i];
pring->flag = 0;
pring->rspidx = 0;
pring->next_cmdidx = 0;
pring->local_getidx = 0;
pring->cmdidx = 0;
pring->missbufcnt = 0;
}
phba->link_state = LPFC_WARM_START;
return 0;
}
/**
* lpfc_sli_brdrestart: Restart the HBA.
* @phba: Pointer to HBA context object.
*
* This function is called in the SLI initialization code path to
* restart the HBA. The caller is not required to hold any lock.
* This function writes MBX_RESTART mailbox command to the SLIM and
* resets the HBA. At the end of the function, it calls lpfc_hba_down_post
* function to free any pending commands. The function enables
* POST only during the first initialization. The function returns zero.
* The function does not guarantee completion of MBX_RESTART mailbox
* command before the return of this function.
**/
int
lpfc_sli_brdrestart(struct lpfc_hba *phba)
{
MAILBOX_t *mb;
struct lpfc_sli *psli;
volatile uint32_t word0;
void __iomem *to_slim;
spin_lock_irq(&phba->hbalock);
psli = &phba->sli;
/* Restart HBA */
lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
"0337 Restart HBA Data: x%x x%x\n",
phba->pport->port_state, psli->sli_flag);
word0 = 0;
mb = (MAILBOX_t *) &word0;
mb->mbxCommand = MBX_RESTART;
mb->mbxHc = 1;
lpfc_reset_barrier(phba);
to_slim = phba->MBslimaddr;
writel(*(uint32_t *) mb, to_slim);
readl(to_slim); /* flush */
/* Only skip post after fc_ffinit is completed */
if (phba->pport->port_state)
word0 = 1; /* This is really setting up word1 */
else
word0 = 0; /* This is really setting up word1 */
to_slim = phba->MBslimaddr + sizeof (uint32_t);
writel(*(uint32_t *) mb, to_slim);
readl(to_slim); /* flush */
lpfc_sli_brdreset(phba);
phba->pport->stopped = 0;
phba->link_state = LPFC_INIT_START;
spin_unlock_irq(&phba->hbalock);
memset(&psli->lnk_stat_offsets, 0, sizeof(psli->lnk_stat_offsets));
psli->stats_start = get_seconds();
/* Give the INITFF and Post time to settle. */
mdelay(100);
lpfc_hba_down_post(phba);
return 0;
}
/**
* lpfc_sli_chipset_init: Wait for the restart of the HBA after a restart.
* @phba: Pointer to HBA context object.
*
* This function is called after a HBA restart to wait for successful
* restart of the HBA. Successful restart of the HBA is indicated by
* HS_FFRDY and HS_MBRDY bits. If the HBA fails to restart even after 15
* iteration, the function will restart the HBA again. The function returns
* zero if HBA successfully restarted else returns negative error code.
**/
static int
lpfc_sli_chipset_init(struct lpfc_hba *phba)
{
uint32_t status, i = 0;
/* Read the HBA Host Status Register */
status = readl(phba->HSregaddr);
/* Check status register to see what current state is */
i = 0;
while ((status & (HS_FFRDY | HS_MBRDY)) != (HS_FFRDY | HS_MBRDY)) {
/* Check every 100ms for 5 retries, then every 500ms for 5, then
* every 2.5 sec for 5, then reset board and every 2.5 sec for
* 4.
*/
if (i++ >= 20) {
/* Adapter failed to init, timeout, status reg
<status> */
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"0436 Adapter failed to init, "
"timeout, status reg x%x, "
"FW Data: A8 x%x AC x%x\n", status,
readl(phba->MBslimaddr + 0xa8),
readl(phba->MBslimaddr + 0xac));
phba->link_state = LPFC_HBA_ERROR;
return -ETIMEDOUT;
}
/* Check to see if any errors occurred during init */
if (status & HS_FFERM) {
/* ERROR: During chipset initialization */
/* Adapter failed to init, chipset, status reg
<status> */
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"0437 Adapter failed to init, "
"chipset, status reg x%x, "
"FW Data: A8 x%x AC x%x\n", status,
readl(phba->MBslimaddr + 0xa8),
readl(phba->MBslimaddr + 0xac));
phba->link_state = LPFC_HBA_ERROR;
return -EIO;
}
if (i <= 5) {
msleep(10);
} else if (i <= 10) {
msleep(500);
} else {
msleep(2500);
}
if (i == 15) {
/* Do post */
phba->pport->port_state = LPFC_VPORT_UNKNOWN;
lpfc_sli_brdrestart(phba);
}
/* Read the HBA Host Status Register */
status = readl(phba->HSregaddr);
}
/* Check to see if any errors occurred during init */
if (status & HS_FFERM) {
/* ERROR: During chipset initialization */
/* Adapter failed to init, chipset, status reg <status> */
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"0438 Adapter failed to init, chipset, "
"status reg x%x, "
"FW Data: A8 x%x AC x%x\n", status,
readl(phba->MBslimaddr + 0xa8),
readl(phba->MBslimaddr + 0xac));
phba->link_state = LPFC_HBA_ERROR;
return -EIO;
}
/* Clear all interrupt enable conditions */
writel(0, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
/* setup host attn register */
writel(0xffffffff, phba->HAregaddr);
readl(phba->HAregaddr); /* flush */
return 0;
}
/**
* lpfc_sli_hbq_count: Get the number of HBQs to be configured.
*
* This function calculates and returns the number of HBQs required to be
* configured.
**/
int
lpfc_sli_hbq_count(void)
{
return ARRAY_SIZE(lpfc_hbq_defs);
}
/**
* lpfc_sli_hbq_entry_count: Calculate total number of hbq entries.
*
* This function adds the number of hbq entries in every HBQ to get
* the total number of hbq entries required for the HBA and returns
* the total count.
**/
static int
lpfc_sli_hbq_entry_count(void)
{
int hbq_count = lpfc_sli_hbq_count();
int count = 0;
int i;
for (i = 0; i < hbq_count; ++i)
count += lpfc_hbq_defs[i]->entry_count;
return count;
}
/**
* lpfc_sli_hbq_size: Calculate memory required for all hbq entries.
*
* This function calculates amount of memory required for all hbq entries
* to be configured and returns the total memory required.
**/
int
lpfc_sli_hbq_size(void)
{
return lpfc_sli_hbq_entry_count() * sizeof(struct lpfc_hbq_entry);
}
/**
* lpfc_sli_hbq_setup: configure and initialize HBQs.
* @phba: Pointer to HBA context object.
*
* This function is called during the SLI initialization to configure
* all the HBQs and post buffers to the HBQ. The caller is not
* required to hold any locks. This function will return zero if successful
* else it will return negative error code.
**/
static int
lpfc_sli_hbq_setup(struct lpfc_hba *phba)
{
int hbq_count = lpfc_sli_hbq_count();
LPFC_MBOXQ_t *pmb;
MAILBOX_t *pmbox;
uint32_t hbqno;
uint32_t hbq_entry_index;
/* Get a Mailbox buffer to setup mailbox
* commands for HBA initialization
*/
pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!pmb)
return -ENOMEM;
pmbox = &pmb->mb;
/* Initialize the struct lpfc_sli_hbq structure for each hbq */
phba->link_state = LPFC_INIT_MBX_CMDS;
phba->hbq_in_use = 1;
hbq_entry_index = 0;
for (hbqno = 0; hbqno < hbq_count; ++hbqno) {
phba->hbqs[hbqno].next_hbqPutIdx = 0;
phba->hbqs[hbqno].hbqPutIdx = 0;
phba->hbqs[hbqno].local_hbqGetIdx = 0;
phba->hbqs[hbqno].entry_count =
lpfc_hbq_defs[hbqno]->entry_count;
lpfc_config_hbq(phba, hbqno, lpfc_hbq_defs[hbqno],
hbq_entry_index, pmb);
hbq_entry_index += phba->hbqs[hbqno].entry_count;
if (lpfc_sli_issue_mbox(phba, pmb, MBX_POLL) != MBX_SUCCESS) {
/* Adapter failed to init, mbxCmd <cmd> CFG_RING,
mbxStatus <status>, ring <num> */
lpfc_printf_log(phba, KERN_ERR,
LOG_SLI | LOG_VPORT,
"1805 Adapter failed to init. "
"Data: x%x x%x x%x\n",
pmbox->mbxCommand,
pmbox->mbxStatus, hbqno);
phba->link_state = LPFC_HBA_ERROR;
mempool_free(pmb, phba->mbox_mem_pool);
return ENXIO;
}
}
phba->hbq_count = hbq_count;
mempool_free(pmb, phba->mbox_mem_pool);
/* Initially populate or replenish the HBQs */
for (hbqno = 0; hbqno < hbq_count; ++hbqno)
lpfc_sli_hbqbuf_init_hbqs(phba, hbqno);
return 0;
}
/**
* lpfc_sli_config_port: Issue config port mailbox command.
* @phba: Pointer to HBA context object.
* @sli_mode: sli mode - 2/3
*
* This function is called by the sli intialization code path
* to issue config_port mailbox command. This function restarts the
* HBA firmware and issues a config_port mailbox command to configure
* the SLI interface in the sli mode specified by sli_mode
* variable. The caller is not required to hold any locks.
* The function returns 0 if successful, else returns negative error
* code.
**/
int
lpfc_sli_config_port(struct lpfc_hba *phba, int sli_mode)
{
LPFC_MBOXQ_t *pmb;
uint32_t resetcount = 0, rc = 0, done = 0;
pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!pmb) {
phba->link_state = LPFC_HBA_ERROR;
return -ENOMEM;
}
phba->sli_rev = sli_mode;
while (resetcount < 2 && !done) {
spin_lock_irq(&phba->hbalock);
phba->sli.sli_flag |= LPFC_SLI_MBOX_ACTIVE;
spin_unlock_irq(&phba->hbalock);
phba->pport->port_state = LPFC_VPORT_UNKNOWN;
lpfc_sli_brdrestart(phba);
rc = lpfc_sli_chipset_init(phba);
if (rc)
break;
spin_lock_irq(&phba->hbalock);
phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
spin_unlock_irq(&phba->hbalock);
resetcount++;
/* Call pre CONFIG_PORT mailbox command initialization. A
* value of 0 means the call was successful. Any other
* nonzero value is a failure, but if ERESTART is returned,
* the driver may reset the HBA and try again.
*/
rc = lpfc_config_port_prep(phba);
if (rc == -ERESTART) {
phba->link_state = LPFC_LINK_UNKNOWN;
continue;
} else if (rc)
break;
phba->link_state = LPFC_INIT_MBX_CMDS;
lpfc_config_port(phba, pmb);
rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);
phba->sli3_options &= ~(LPFC_SLI3_NPIV_ENABLED |
LPFC_SLI3_HBQ_ENABLED |
LPFC_SLI3_CRP_ENABLED |
LPFC_SLI3_INB_ENABLED |
LPFC_SLI3_BG_ENABLED);
if (rc != MBX_SUCCESS) {
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"0442 Adapter failed to init, mbxCmd x%x "
"CONFIG_PORT, mbxStatus x%x Data: x%x\n",
pmb->mb.mbxCommand, pmb->mb.mbxStatus, 0);
spin_lock_irq(&phba->hbalock);
phba->sli.sli_flag &= ~LPFC_SLI2_ACTIVE;
spin_unlock_irq(&phba->hbalock);
rc = -ENXIO;
} else
done = 1;
}
if (!done) {
rc = -EINVAL;
goto do_prep_failed;
}
if (pmb->mb.un.varCfgPort.sli_mode == 3) {
if (!pmb->mb.un.varCfgPort.cMA) {
rc = -ENXIO;
goto do_prep_failed;
}
if (phba->max_vpi && pmb->mb.un.varCfgPort.gmv) {
phba->sli3_options |= LPFC_SLI3_NPIV_ENABLED;
phba->max_vpi = pmb->mb.un.varCfgPort.max_vpi;
} else
phba->max_vpi = 0;
if (pmb->mb.un.varCfgPort.gerbm)
phba->sli3_options |= LPFC_SLI3_HBQ_ENABLED;
if (pmb->mb.un.varCfgPort.gcrp)
phba->sli3_options |= LPFC_SLI3_CRP_ENABLED;
if (pmb->mb.un.varCfgPort.ginb) {
phba->sli3_options |= LPFC_SLI3_INB_ENABLED;
phba->hbq_get = phba->mbox->us.s3_inb_pgp.hbq_get;
phba->port_gp = phba->mbox->us.s3_inb_pgp.port;
phba->inb_ha_copy = &phba->mbox->us.s3_inb_pgp.ha_copy;
phba->inb_counter = &phba->mbox->us.s3_inb_pgp.counter;
phba->inb_last_counter =
phba->mbox->us.s3_inb_pgp.counter;
} else {
phba->hbq_get = phba->mbox->us.s3_pgp.hbq_get;
phba->port_gp = phba->mbox->us.s3_pgp.port;
phba->inb_ha_copy = NULL;
phba->inb_counter = NULL;
}
if (phba->cfg_enable_bg) {
if (pmb->mb.un.varCfgPort.gbg)
phba->sli3_options |= LPFC_SLI3_BG_ENABLED;
else
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"0443 Adapter did not grant "
"BlockGuard\n");
}
} else {
phba->hbq_get = NULL;
phba->port_gp = phba->mbox->us.s2.port;
phba->inb_ha_copy = NULL;
phba->inb_counter = NULL;
phba->max_vpi = 0;
}
do_prep_failed:
mempool_free(pmb, phba->mbox_mem_pool);
return rc;
}
/**
* lpfc_sli_hba_setup: SLI intialization function.
* @phba: Pointer to HBA context object.
*
* This function is the main SLI intialization function. This function
* is called by the HBA intialization code, HBA reset code and HBA
* error attention handler code. Caller is not required to hold any
* locks. This function issues config_port mailbox command to configure
* the SLI, setup iocb rings and HBQ rings. In the end the function
* calls the config_port_post function to issue init_link mailbox
* command and to start the discovery. The function will return zero
* if successful, else it will return negative error code.
**/
int
lpfc_sli_hba_setup(struct lpfc_hba *phba)
{
uint32_t rc;
int mode = 3;
switch (lpfc_sli_mode) {
case 2:
if (phba->cfg_enable_npiv) {
lpfc_printf_log(phba, KERN_ERR, LOG_INIT | LOG_VPORT,
"1824 NPIV enabled: Override lpfc_sli_mode "
"parameter (%d) to auto (0).\n",
lpfc_sli_mode);
break;
}
mode = 2;
break;
case 0:
case 3:
break;
default:
lpfc_printf_log(phba, KERN_ERR, LOG_INIT | LOG_VPORT,
"1819 Unrecognized lpfc_sli_mode "
"parameter: %d.\n", lpfc_sli_mode);
break;
}
rc = lpfc_sli_config_port(phba, mode);
if (rc && lpfc_sli_mode == 3)
lpfc_printf_log(phba, KERN_ERR, LOG_INIT | LOG_VPORT,
"1820 Unable to select SLI-3. "
"Not supported by adapter.\n");
if (rc && mode != 2)
rc = lpfc_sli_config_port(phba, 2);
if (rc)
goto lpfc_sli_hba_setup_error;
if (phba->sli_rev == 3) {
phba->iocb_cmd_size = SLI3_IOCB_CMD_SIZE;
phba->iocb_rsp_size = SLI3_IOCB_RSP_SIZE;
} else {
phba->iocb_cmd_size = SLI2_IOCB_CMD_SIZE;
phba->iocb_rsp_size = SLI2_IOCB_RSP_SIZE;
phba->sli3_options = 0;
}
lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
"0444 Firmware in SLI %x mode. Max_vpi %d\n",
phba->sli_rev, phba->max_vpi);
rc = lpfc_sli_ring_map(phba);
if (rc)
goto lpfc_sli_hba_setup_error;
/* Init HBQs */
if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
rc = lpfc_sli_hbq_setup(phba);
if (rc)
goto lpfc_sli_hba_setup_error;
}
phba->sli.sli_flag |= LPFC_PROCESS_LA;
rc = lpfc_config_port_post(phba);
if (rc)
goto lpfc_sli_hba_setup_error;
return rc;
lpfc_sli_hba_setup_error:
phba->link_state = LPFC_HBA_ERROR;
lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
"0445 Firmware initialization failed\n");
return rc;
}
/**
* lpfc_mbox_timeout: Timeout call back function for mbox timer.
* @ptr: context object - pointer to hba structure.
*
* This is the callback function for mailbox timer. The mailbox
* timer is armed when a new mailbox command is issued and the timer
* is deleted when the mailbox complete. The function is called by
* the kernel timer code when a mailbox does not complete within
* expected time. This function wakes up the worker thread to
* process the mailbox timeout and returns. All the processing is
* done by the worker thread function lpfc_mbox_timeout_handler.
**/
void
lpfc_mbox_timeout(unsigned long ptr)
{
struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
unsigned long iflag;
uint32_t tmo_posted;
spin_lock_irqsave(&phba->pport->work_port_lock, iflag);
tmo_posted = phba->pport->work_port_events & WORKER_MBOX_TMO;
if (!tmo_posted)
phba->pport->work_port_events |= WORKER_MBOX_TMO;
spin_unlock_irqrestore(&phba->pport->work_port_lock, iflag);
if (!tmo_posted)
lpfc_worker_wake_up(phba);
return;
}
/**
* lpfc_mbox_timeout_handler: Worker thread function to handle mailbox timeout.
* @phba: Pointer to HBA context object.
*
* This function is called from worker thread when a mailbox command times out.
* The caller is not required to hold any locks. This function will reset the
* HBA and recover all the pending commands.
**/
void
lpfc_mbox_timeout_handler(struct lpfc_hba *phba)
{
LPFC_MBOXQ_t *pmbox = phba->sli.mbox_active;
MAILBOX_t *mb = &pmbox->mb;
struct lpfc_sli *psli = &phba->sli;
struct lpfc_sli_ring *pring;
/* Mbox cmd <mbxCommand> timeout */
lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
"0310 Mailbox command x%x timeout Data: x%x x%x x%p\n",
mb->mbxCommand,
phba->pport->port_state,
phba->sli.sli_flag,
phba->sli.mbox_active);
/* Setting state unknown so lpfc_sli_abort_iocb_ring
* would get IOCB_ERROR from lpfc_sli_issue_iocb, allowing
* it to fail all oustanding SCSI IO.
*/
spin_lock_irq(&phba->pport->work_port_lock);
phba->pport->work_port_events &= ~WORKER_MBOX_TMO;
spin_unlock_irq(&phba->pport->work_port_lock);
spin_lock_irq(&phba->hbalock);
phba->link_state = LPFC_LINK_UNKNOWN;
psli->sli_flag &= ~LPFC_SLI2_ACTIVE;
spin_unlock_irq(&phba->hbalock);
pring = &psli->ring[psli->fcp_ring];
lpfc_sli_abort_iocb_ring(phba, pring);
lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
"0345 Resetting board due to mailbox timeout\n");
/*
* lpfc_offline calls lpfc_sli_hba_down which will clean up
* on oustanding mailbox commands.
*/
/* If resets are disabled then set error state and return. */
if (!phba->cfg_enable_hba_reset) {
phba->link_state = LPFC_HBA_ERROR;
return;
}
lpfc_offline_prep(phba);
lpfc_offline(phba);
lpfc_sli_brdrestart(phba);
lpfc_online(phba);
lpfc_unblock_mgmt_io(phba);
return;
}
/**
* lpfc_sli_issue_mbox: Issue a mailbox command to firmware.
* @phba: Pointer to HBA context object.
* @pmbox: Pointer to mailbox object.
* @flag: Flag indicating how the mailbox need to be processed.
*
* This function is called by discovery code and HBA management code
* to submit a mailbox command to firmware. This function gets the
* hbalock to protect the data structures.
* The mailbox command can be submitted in polling mode, in which case
* this function will wait in a polling loop for the completion of the
* mailbox.
* If the mailbox is submitted in no_wait mode (not polling) the
* function will submit the command and returns immediately without waiting
* for the mailbox completion. The no_wait is supported only when HBA
* is in SLI2/SLI3 mode - interrupts are enabled.
* The SLI interface allows only one mailbox pending at a time. If the
* mailbox is issued in polling mode and there is already a mailbox
* pending, then the function will return an error. If the mailbox is issued
* in NO_WAIT mode and there is a mailbox pending already, the function
* will return MBX_BUSY after queuing the mailbox into mailbox queue.
* The sli layer owns the mailbox object until the completion of mailbox
* command if this function return MBX_BUSY or MBX_SUCCESS. For all other
* return codes the caller owns the mailbox command after the return of
* the function.
**/
int
lpfc_sli_issue_mbox(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmbox, uint32_t flag)
{
MAILBOX_t *mb;
struct lpfc_sli *psli = &phba->sli;
uint32_t status, evtctr;
uint32_t ha_copy;
int i;
unsigned long timeout;
unsigned long drvr_flag = 0;
uint32_t word0, ldata;
void __iomem *to_slim;
int processing_queue = 0;
spin_lock_irqsave(&phba->hbalock, drvr_flag);
if (!pmbox) {
/* processing mbox queue from intr_handler */
processing_queue = 1;
phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
pmbox = lpfc_mbox_get(phba);
if (!pmbox) {
spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
return MBX_SUCCESS;
}
}
if (pmbox->mbox_cmpl && pmbox->mbox_cmpl != lpfc_sli_def_mbox_cmpl &&
pmbox->mbox_cmpl != lpfc_sli_wake_mbox_wait) {
if(!pmbox->vport) {
spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
lpfc_printf_log(phba, KERN_ERR,
LOG_MBOX | LOG_VPORT,
"1806 Mbox x%x failed. No vport\n",
pmbox->mb.mbxCommand);
dump_stack();
goto out_not_finished;
}
}
/* If the PCI channel is in offline state, do not post mbox. */
if (unlikely(pci_channel_offline(phba->pcidev))) {
spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
goto out_not_finished;
}
psli = &phba->sli;
mb = &pmbox->mb;
status = MBX_SUCCESS;
if (phba->link_state == LPFC_HBA_ERROR) {
spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
/* Mbox command <mbxCommand> cannot issue */
LOG_MBOX_CANNOT_ISSUE_DATA(phba, pmbox, psli, flag);
goto out_not_finished;
}
if (mb->mbxCommand != MBX_KILL_BOARD && flag & MBX_NOWAIT &&
!(readl(phba->HCregaddr) & HC_MBINT_ENA)) {
spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
LOG_MBOX_CANNOT_ISSUE_DATA(phba, pmbox, psli, flag);
goto out_not_finished;
}
if (psli->sli_flag & LPFC_SLI_MBOX_ACTIVE) {
/* Polling for a mbox command when another one is already active
* is not allowed in SLI. Also, the driver must have established
* SLI2 mode to queue and process multiple mbox commands.
*/
if (flag & MBX_POLL) {
spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
/* Mbox command <mbxCommand> cannot issue */
LOG_MBOX_CANNOT_ISSUE_DATA(phba, pmbox, psli, flag);
goto out_not_finished;
}
if (!(psli->sli_flag & LPFC_SLI2_ACTIVE)) {
spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
/* Mbox command <mbxCommand> cannot issue */
LOG_MBOX_CANNOT_ISSUE_DATA(phba, pmbox, psli, flag);
goto out_not_finished;
}
/* Another mailbox command is still being processed, queue this
* command to be processed later.
*/
lpfc_mbox_put(phba, pmbox);
/* Mbox cmd issue - BUSY */
lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI,
"(%d):0308 Mbox cmd issue - BUSY Data: "
"x%x x%x x%x x%x\n",
pmbox->vport ? pmbox->vport->vpi : 0xffffff,
mb->mbxCommand, phba->pport->port_state,
psli->sli_flag, flag);
psli->slistat.mbox_busy++;
spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
if (pmbox->vport) {
lpfc_debugfs_disc_trc(pmbox->vport,
LPFC_DISC_TRC_MBOX_VPORT,
"MBOX Bsy vport: cmd:x%x mb:x%x x%x",
(uint32_t)mb->mbxCommand,
mb->un.varWords[0], mb->un.varWords[1]);
}
else {
lpfc_debugfs_disc_trc(phba->pport,
LPFC_DISC_TRC_MBOX,
"MBOX Bsy: cmd:x%x mb:x%x x%x",
(uint32_t)mb->mbxCommand,
mb->un.varWords[0], mb->un.varWords[1]);
}
return MBX_BUSY;
}
psli->sli_flag |= LPFC_SLI_MBOX_ACTIVE;
/* If we are not polling, we MUST be in SLI2 mode */
if (flag != MBX_POLL) {
if (!(psli->sli_flag & LPFC_SLI2_ACTIVE) &&
(mb->mbxCommand != MBX_KILL_BOARD)) {
psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
/* Mbox command <mbxCommand> cannot issue */
LOG_MBOX_CANNOT_ISSUE_DATA(phba, pmbox, psli, flag);
goto out_not_finished;
}
/* timeout active mbox command */
mod_timer(&psli->mbox_tmo, (jiffies +
(HZ * lpfc_mbox_tmo_val(phba, mb->mbxCommand))));
}
/* Mailbox cmd <cmd> issue */
lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI,
"(%d):0309 Mailbox cmd x%x issue Data: x%x x%x "
"x%x\n",
pmbox->vport ? pmbox->vport->vpi : 0,
mb->mbxCommand, phba->pport->port_state,
psli->sli_flag, flag);
if (mb->mbxCommand != MBX_HEARTBEAT) {
if (pmbox->vport) {
lpfc_debugfs_disc_trc(pmbox->vport,
LPFC_DISC_TRC_MBOX_VPORT,
"MBOX Send vport: cmd:x%x mb:x%x x%x",
(uint32_t)mb->mbxCommand,
mb->un.varWords[0], mb->un.varWords[1]);
}
else {
lpfc_debugfs_disc_trc(phba->pport,
LPFC_DISC_TRC_MBOX,
"MBOX Send: cmd:x%x mb:x%x x%x",
(uint32_t)mb->mbxCommand,
mb->un.varWords[0], mb->un.varWords[1]);
}
}
psli->slistat.mbox_cmd++;
evtctr = psli->slistat.mbox_event;
/* next set own bit for the adapter and copy over command word */
mb->mbxOwner = OWN_CHIP;
if (psli->sli_flag & LPFC_SLI2_ACTIVE) {
/* First copy command data to host SLIM area */
lpfc_sli_pcimem_bcopy(mb, phba->mbox, MAILBOX_CMD_SIZE);
} else {
if (mb->mbxCommand == MBX_CONFIG_PORT) {
/* copy command data into host mbox for cmpl */
lpfc_sli_pcimem_bcopy(mb, phba->mbox, MAILBOX_CMD_SIZE);
}
/* First copy mbox command data to HBA SLIM, skip past first
word */
to_slim = phba->MBslimaddr + sizeof (uint32_t);
lpfc_memcpy_to_slim(to_slim, &mb->un.varWords[0],
MAILBOX_CMD_SIZE - sizeof (uint32_t));
/* Next copy over first word, with mbxOwner set */
ldata = *((uint32_t *)mb);
to_slim = phba->MBslimaddr;
writel(ldata, to_slim);
readl(to_slim); /* flush */
if (mb->mbxCommand == MBX_CONFIG_PORT) {
/* switch over to host mailbox */
psli->sli_flag |= LPFC_SLI2_ACTIVE;
}
}
wmb();
switch (flag) {
case MBX_NOWAIT:
/* Set up reference to mailbox command */
psli->mbox_active = pmbox;
/* Interrupt board to do it */
writel(CA_MBATT, phba->CAregaddr);
readl(phba->CAregaddr); /* flush */
/* Don't wait for it to finish, just return */
break;
case MBX_POLL:
/* Set up null reference to mailbox command */
psli->mbox_active = NULL;
/* Interrupt board to do it */
writel(CA_MBATT, phba->CAregaddr);
readl(phba->CAregaddr); /* flush */
if (psli->sli_flag & LPFC_SLI2_ACTIVE) {
/* First read mbox status word */
word0 = *((uint32_t *)phba->mbox);
word0 = le32_to_cpu(word0);
} else {
/* First read mbox status word */
word0 = readl(phba->MBslimaddr);
}
/* Read the HBA Host Attention Register */
ha_copy = readl(phba->HAregaddr);
timeout = msecs_to_jiffies(lpfc_mbox_tmo_val(phba,
mb->mbxCommand) *
1000) + jiffies;
i = 0;
/* Wait for command to complete */
while (((word0 & OWN_CHIP) == OWN_CHIP) ||
(!(ha_copy & HA_MBATT) &&
(phba->link_state > LPFC_WARM_START))) {
if (time_after(jiffies, timeout)) {
psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
spin_unlock_irqrestore(&phba->hbalock,
drvr_flag);
goto out_not_finished;
}
/* Check if we took a mbox interrupt while we were
polling */
if (((word0 & OWN_CHIP) != OWN_CHIP)
&& (evtctr != psli->slistat.mbox_event))
break;
if (i++ > 10) {
spin_unlock_irqrestore(&phba->hbalock,
drvr_flag);
msleep(1);
spin_lock_irqsave(&phba->hbalock, drvr_flag);
}
if (psli->sli_flag & LPFC_SLI2_ACTIVE) {
/* First copy command data */
word0 = *((uint32_t *)phba->mbox);
word0 = le32_to_cpu(word0);
if (mb->mbxCommand == MBX_CONFIG_PORT) {
MAILBOX_t *slimmb;
uint32_t slimword0;
/* Check real SLIM for any errors */
slimword0 = readl(phba->MBslimaddr);
slimmb = (MAILBOX_t *) & slimword0;
if (((slimword0 & OWN_CHIP) != OWN_CHIP)
&& slimmb->mbxStatus) {
psli->sli_flag &=
~LPFC_SLI2_ACTIVE;
word0 = slimword0;
}
}
} else {
/* First copy command data */
word0 = readl(phba->MBslimaddr);
}
/* Read the HBA Host Attention Register */
ha_copy = readl(phba->HAregaddr);
}
if (psli->sli_flag & LPFC_SLI2_ACTIVE) {
/* copy results back to user */
lpfc_sli_pcimem_bcopy(phba->mbox, mb, MAILBOX_CMD_SIZE);
} else {
/* First copy command data */
lpfc_memcpy_from_slim(mb, phba->MBslimaddr,
MAILBOX_CMD_SIZE);
if ((mb->mbxCommand == MBX_DUMP_MEMORY) &&
pmbox->context2) {
lpfc_memcpy_from_slim((void *)pmbox->context2,
phba->MBslimaddr + DMP_RSP_OFFSET,
mb->un.varDmp.word_cnt);
}
}
writel(HA_MBATT, phba->HAregaddr);
readl(phba->HAregaddr); /* flush */
psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
status = mb->mbxStatus;
}
spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
return status;
out_not_finished:
if (processing_queue) {
pmbox->mb.mbxStatus = MBX_NOT_FINISHED;
lpfc_mbox_cmpl_put(phba, pmbox);
}
return MBX_NOT_FINISHED;
}
/**
* __lpfc_sli_ringtx_put: Add an iocb to the txq.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @piocb: Pointer to address of newly added command iocb.
*
* This function is called with hbalock held to add a command
* iocb to the txq when SLI layer cannot submit the command iocb
* to the ring.
**/
static void
__lpfc_sli_ringtx_put(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
struct lpfc_iocbq *piocb)
{
/* Insert the caller's iocb in the txq tail for later processing. */
list_add_tail(&piocb->list, &pring->txq);
pring->txq_cnt++;
}
/**
* lpfc_sli_next_iocb: Get the next iocb in the txq.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @piocb: Pointer to address of newly added command iocb.
*
* This function is called with hbalock held before a new
* iocb is submitted to the firmware. This function checks
* txq to flush the iocbs in txq to Firmware before
* submitting new iocbs to the Firmware.
* If there are iocbs in the txq which need to be submitted
* to firmware, lpfc_sli_next_iocb returns the first element
* of the txq after dequeuing it from txq.
* If there is no iocb in the txq then the function will return
* *piocb and *piocb is set to NULL. Caller needs to check
* *piocb to find if there are more commands in the txq.
**/
static struct lpfc_iocbq *
lpfc_sli_next_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
struct lpfc_iocbq **piocb)
{
struct lpfc_iocbq * nextiocb;
nextiocb = lpfc_sli_ringtx_get(phba, pring);
if (!nextiocb) {
nextiocb = *piocb;
*piocb = NULL;
}
return nextiocb;
}
/**
* __lpfc_sli_issue_iocb: Lockless version of lpfc_sli_issue_iocb.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @piocb: Pointer to command iocb.
* @flag: Flag indicating if this command can be put into txq.
*
* __lpfc_sli_issue_iocb is used by other functions in the driver
* to issue an iocb command to the HBA. If the PCI slot is recovering
* from error state or if HBA is resetting or if LPFC_STOP_IOCB_EVENT
* flag is turned on, the function returns IOCB_ERROR.
* When the link is down, this function allows only iocbs for
* posting buffers.
* This function finds next available slot in the command ring and
* posts the command to the available slot and writes the port
* attention register to request HBA start processing new iocb.
* If there is no slot available in the ring and
* flag & SLI_IOCB_RET_IOCB is set, the new iocb is added to the
* txq, otherwise the function returns IOCB_BUSY.
*
* This function is called with hbalock held.
* The function will return success after it successfully submit the
* iocb to firmware or after adding to the txq.
**/
static int
__lpfc_sli_issue_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
struct lpfc_iocbq *piocb, uint32_t flag)
{
struct lpfc_iocbq *nextiocb;
IOCB_t *iocb;
if (piocb->iocb_cmpl && (!piocb->vport) &&
(piocb->iocb.ulpCommand != CMD_ABORT_XRI_CN) &&
(piocb->iocb.ulpCommand != CMD_CLOSE_XRI_CN)) {
lpfc_printf_log(phba, KERN_ERR,
LOG_SLI | LOG_VPORT,
"1807 IOCB x%x failed. No vport\n",
piocb->iocb.ulpCommand);
dump_stack();
return IOCB_ERROR;
}
/* If the PCI channel is in offline state, do not post iocbs. */
if (unlikely(pci_channel_offline(phba->pcidev)))
return IOCB_ERROR;
/*
* We should never get an IOCB if we are in a < LINK_DOWN state
*/
if (unlikely(phba->link_state < LPFC_LINK_DOWN))
return IOCB_ERROR;
/*
* Check to see if we are blocking IOCB processing because of a
* outstanding event.
*/
if (unlikely(pring->flag & LPFC_STOP_IOCB_EVENT))
goto iocb_busy;
if (unlikely(phba->link_state == LPFC_LINK_DOWN)) {
/*
* Only CREATE_XRI, CLOSE_XRI, and QUE_RING_BUF
* can be issued if the link is not up.
*/
switch (piocb->iocb.ulpCommand) {
case CMD_GEN_REQUEST64_CR:
case CMD_GEN_REQUEST64_CX:
if (!(phba->sli.sli_flag & LPFC_MENLO_MAINT) ||
(piocb->iocb.un.genreq64.w5.hcsw.Rctl !=
FC_FCP_CMND) ||
(piocb->iocb.un.genreq64.w5.hcsw.Type !=
MENLO_TRANSPORT_TYPE))
goto iocb_busy;
break;
case CMD_QUE_RING_BUF_CN:
case CMD_QUE_RING_BUF64_CN:
/*
* For IOCBs, like QUE_RING_BUF, that have no rsp ring
* completion, iocb_cmpl MUST be 0.
*/
if (piocb->iocb_cmpl)
piocb->iocb_cmpl = NULL;
/*FALLTHROUGH*/
case CMD_CREATE_XRI_CR:
case CMD_CLOSE_XRI_CN:
case CMD_CLOSE_XRI_CX:
break;
default:
goto iocb_busy;
}
/*
* For FCP commands, we must be in a state where we can process link
* attention events.
*/
} else if (unlikely(pring->ringno == phba->sli.fcp_ring &&
!(phba->sli.sli_flag & LPFC_PROCESS_LA))) {
goto iocb_busy;
}
while ((iocb = lpfc_sli_next_iocb_slot(phba, pring)) &&
(nextiocb = lpfc_sli_next_iocb(phba, pring, &piocb)))
lpfc_sli_submit_iocb(phba, pring, iocb, nextiocb);
if (iocb)
lpfc_sli_update_ring(phba, pring);
else
lpfc_sli_update_full_ring(phba, pring);
if (!piocb)
return IOCB_SUCCESS;
goto out_busy;
iocb_busy:
pring->stats.iocb_cmd_delay++;
out_busy:
if (!(flag & SLI_IOCB_RET_IOCB)) {
__lpfc_sli_ringtx_put(phba, pring, piocb);
return IOCB_SUCCESS;
}
return IOCB_BUSY;
}
/**
* lpfc_sli_issue_iocb: Wrapper function for __lpfc_sli_issue_iocb.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @piocb: Pointer to command iocb.
* @flag: Flag indicating if this command can be put into txq.
*
* lpfc_sli_issue_iocb is a wrapper around __lpfc_sli_issue_iocb
* function. This function gets the hbalock and calls
* __lpfc_sli_issue_iocb function and will return the error returned
* by __lpfc_sli_issue_iocb function. This wrapper is used by
* functions which do not hold hbalock.
**/
int
lpfc_sli_issue_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
struct lpfc_iocbq *piocb, uint32_t flag)
{
unsigned long iflags;
int rc;
spin_lock_irqsave(&phba->hbalock, iflags);
rc = __lpfc_sli_issue_iocb(phba, pring, piocb, flag);
spin_unlock_irqrestore(&phba->hbalock, iflags);
return rc;
}
/**
* lpfc_extra_ring_setup: Extra ring setup function.
* @phba: Pointer to HBA context object.
*
* This function is called while driver attaches with the
* HBA to setup the extra ring. The extra ring is used
* only when driver needs to support target mode functionality
* or IP over FC functionalities.
*
* This function is called with no lock held.
**/
static int
lpfc_extra_ring_setup( struct lpfc_hba *phba)
{
struct lpfc_sli *psli;
struct lpfc_sli_ring *pring;
psli = &phba->sli;
/* Adjust cmd/rsp ring iocb entries more evenly */
/* Take some away from the FCP ring */
pring = &psli->ring[psli->fcp_ring];
pring->numCiocb -= SLI2_IOCB_CMD_R1XTRA_ENTRIES;
pring->numRiocb -= SLI2_IOCB_RSP_R1XTRA_ENTRIES;
pring->numCiocb -= SLI2_IOCB_CMD_R3XTRA_ENTRIES;
pring->numRiocb -= SLI2_IOCB_RSP_R3XTRA_ENTRIES;
/* and give them to the extra ring */
pring = &psli->ring[psli->extra_ring];
pring->numCiocb += SLI2_IOCB_CMD_R1XTRA_ENTRIES;
pring->numRiocb += SLI2_IOCB_RSP_R1XTRA_ENTRIES;
pring->numCiocb += SLI2_IOCB_CMD_R3XTRA_ENTRIES;
pring->numRiocb += SLI2_IOCB_RSP_R3XTRA_ENTRIES;
/* Setup default profile for this ring */
pring->iotag_max = 4096;
pring->num_mask = 1;
pring->prt[0].profile = 0; /* Mask 0 */
pring->prt[0].rctl = phba->cfg_multi_ring_rctl;
pring->prt[0].type = phba->cfg_multi_ring_type;
pring->prt[0].lpfc_sli_rcv_unsol_event = NULL;
return 0;
}
/**
* lpfc_sli_async_event_handler: ASYNC iocb handler function.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @iocbq: Pointer to iocb object.
*
* This function is called by the slow ring event handler
* function when there is an ASYNC event iocb in the ring.
* This function is called with no lock held.
* Currently this function handles only temperature related
* ASYNC events. The function decodes the temperature sensor
* event message and posts events for the management applications.
**/
static void
lpfc_sli_async_event_handler(struct lpfc_hba * phba,
struct lpfc_sli_ring * pring, struct lpfc_iocbq * iocbq)
{
IOCB_t *icmd;
uint16_t evt_code;
uint16_t temp;
struct temp_event temp_event_data;
struct Scsi_Host *shost;
icmd = &iocbq->iocb;
evt_code = icmd->un.asyncstat.evt_code;
temp = icmd->ulpContext;
if ((evt_code != ASYNC_TEMP_WARN) &&
(evt_code != ASYNC_TEMP_SAFE)) {
lpfc_printf_log(phba,
KERN_ERR,
LOG_SLI,
"0346 Ring %d handler: unexpected ASYNC_STATUS"
" evt_code 0x%x\n",
pring->ringno,
icmd->un.asyncstat.evt_code);
return;
}
temp_event_data.data = (uint32_t)temp;
temp_event_data.event_type = FC_REG_TEMPERATURE_EVENT;
if (evt_code == ASYNC_TEMP_WARN) {
temp_event_data.event_code = LPFC_THRESHOLD_TEMP;
lpfc_printf_log(phba,
KERN_ERR,
LOG_TEMP,
"0347 Adapter is very hot, please take "
"corrective action. temperature : %d Celsius\n",
temp);
}
if (evt_code == ASYNC_TEMP_SAFE) {
temp_event_data.event_code = LPFC_NORMAL_TEMP;
lpfc_printf_log(phba,
KERN_ERR,
LOG_TEMP,
"0340 Adapter temperature is OK now. "
"temperature : %d Celsius\n",
temp);
}
/* Send temperature change event to applications */
shost = lpfc_shost_from_vport(phba->pport);
fc_host_post_vendor_event(shost, fc_get_event_number(),
sizeof(temp_event_data), (char *) &temp_event_data,
LPFC_NL_VENDOR_ID);
}
/**
* lpfc_sli_setup: SLI ring setup function.
* @phba: Pointer to HBA context object.
*
* lpfc_sli_setup sets up rings of the SLI interface with
* number of iocbs per ring and iotags. This function is
* called while driver attach to the HBA and before the
* interrupts are enabled. So there is no need for locking.
*
* This function always returns 0.
**/
int
lpfc_sli_setup(struct lpfc_hba *phba)
{
int i, totiocbsize = 0;
struct lpfc_sli *psli = &phba->sli;
struct lpfc_sli_ring *pring;
psli->num_rings = MAX_CONFIGURED_RINGS;
psli->sli_flag = 0;
psli->fcp_ring = LPFC_FCP_RING;
psli->next_ring = LPFC_FCP_NEXT_RING;
psli->extra_ring = LPFC_EXTRA_RING;
psli->iocbq_lookup = NULL;
psli->iocbq_lookup_len = 0;
psli->last_iotag = 0;
for (i = 0; i < psli->num_rings; i++) {
pring = &psli->ring[i];
switch (i) {
case LPFC_FCP_RING: /* ring 0 - FCP */
/* numCiocb and numRiocb are used in config_port */
pring->numCiocb = SLI2_IOCB_CMD_R0_ENTRIES;
pring->numRiocb = SLI2_IOCB_RSP_R0_ENTRIES;
pring->numCiocb += SLI2_IOCB_CMD_R1XTRA_ENTRIES;
pring->numRiocb += SLI2_IOCB_RSP_R1XTRA_ENTRIES;
pring->numCiocb += SLI2_IOCB_CMD_R3XTRA_ENTRIES;
pring->numRiocb += SLI2_IOCB_RSP_R3XTRA_ENTRIES;
pring->sizeCiocb = (phba->sli_rev == 3) ?
SLI3_IOCB_CMD_SIZE :
SLI2_IOCB_CMD_SIZE;
pring->sizeRiocb = (phba->sli_rev == 3) ?
SLI3_IOCB_RSP_SIZE :
SLI2_IOCB_RSP_SIZE;
pring->iotag_ctr = 0;
pring->iotag_max =
(phba->cfg_hba_queue_depth * 2);
pring->fast_iotag = pring->iotag_max;
pring->num_mask = 0;
break;
case LPFC_EXTRA_RING: /* ring 1 - EXTRA */
/* numCiocb and numRiocb are used in config_port */
pring->numCiocb = SLI2_IOCB_CMD_R1_ENTRIES;
pring->numRiocb = SLI2_IOCB_RSP_R1_ENTRIES;
pring->sizeCiocb = (phba->sli_rev == 3) ?
SLI3_IOCB_CMD_SIZE :
SLI2_IOCB_CMD_SIZE;
pring->sizeRiocb = (phba->sli_rev == 3) ?
SLI3_IOCB_RSP_SIZE :
SLI2_IOCB_RSP_SIZE;
pring->iotag_max = phba->cfg_hba_queue_depth;
pring->num_mask = 0;
break;
case LPFC_ELS_RING: /* ring 2 - ELS / CT */
/* numCiocb and numRiocb are used in config_port */
pring->numCiocb = SLI2_IOCB_CMD_R2_ENTRIES;
pring->numRiocb = SLI2_IOCB_RSP_R2_ENTRIES;
pring->sizeCiocb = (phba->sli_rev == 3) ?
SLI3_IOCB_CMD_SIZE :
SLI2_IOCB_CMD_SIZE;
pring->sizeRiocb = (phba->sli_rev == 3) ?
SLI3_IOCB_RSP_SIZE :
SLI2_IOCB_RSP_SIZE;
pring->fast_iotag = 0;
pring->iotag_ctr = 0;
pring->iotag_max = 4096;
pring->lpfc_sli_rcv_async_status =
lpfc_sli_async_event_handler;
pring->num_mask = 4;
pring->prt[0].profile = 0; /* Mask 0 */
pring->prt[0].rctl = FC_ELS_REQ;
pring->prt[0].type = FC_ELS_DATA;
pring->prt[0].lpfc_sli_rcv_unsol_event =
lpfc_els_unsol_event;
pring->prt[1].profile = 0; /* Mask 1 */
pring->prt[1].rctl = FC_ELS_RSP;
pring->prt[1].type = FC_ELS_DATA;
pring->prt[1].lpfc_sli_rcv_unsol_event =
lpfc_els_unsol_event;
pring->prt[2].profile = 0; /* Mask 2 */
/* NameServer Inquiry */
pring->prt[2].rctl = FC_UNSOL_CTL;
/* NameServer */
pring->prt[2].type = FC_COMMON_TRANSPORT_ULP;
pring->prt[2].lpfc_sli_rcv_unsol_event =
lpfc_ct_unsol_event;
pring->prt[3].profile = 0; /* Mask 3 */
/* NameServer response */
pring->prt[3].rctl = FC_SOL_CTL;
/* NameServer */
pring->prt[3].type = FC_COMMON_TRANSPORT_ULP;
pring->prt[3].lpfc_sli_rcv_unsol_event =
lpfc_ct_unsol_event;
break;
}
totiocbsize += (pring->numCiocb * pring->sizeCiocb) +
(pring->numRiocb * pring->sizeRiocb);
}
if (totiocbsize > MAX_SLIM_IOCB_SIZE) {
/* Too many cmd / rsp ring entries in SLI2 SLIM */
printk(KERN_ERR "%d:0462 Too many cmd / rsp ring entries in "
"SLI2 SLIM Data: x%x x%lx\n",
phba->brd_no, totiocbsize,
(unsigned long) MAX_SLIM_IOCB_SIZE);
}
if (phba->cfg_multi_ring_support == 2)
lpfc_extra_ring_setup(phba);
return 0;
}
/**
* lpfc_sli_queue_setup: Queue initialization function.
* @phba: Pointer to HBA context object.
*
* lpfc_sli_queue_setup sets up mailbox queues and iocb queues for each
* ring. This function also initializes ring indices of each ring.
* This function is called during the initialization of the SLI
* interface of an HBA.
* This function is called with no lock held and always returns
* 1.
**/
int
lpfc_sli_queue_setup(struct lpfc_hba *phba)
{
struct lpfc_sli *psli;
struct lpfc_sli_ring *pring;
int i;
psli = &phba->sli;
spin_lock_irq(&phba->hbalock);
INIT_LIST_HEAD(&psli->mboxq);
INIT_LIST_HEAD(&psli->mboxq_cmpl);
/* Initialize list headers for txq and txcmplq as double linked lists */
for (i = 0; i < psli->num_rings; i++) {
pring = &psli->ring[i];
pring->ringno = i;
pring->next_cmdidx = 0;
pring->local_getidx = 0;
pring->cmdidx = 0;
INIT_LIST_HEAD(&pring->txq);
INIT_LIST_HEAD(&pring->txcmplq);
INIT_LIST_HEAD(&pring->iocb_continueq);
INIT_LIST_HEAD(&pring->iocb_continue_saveq);
INIT_LIST_HEAD(&pring->postbufq);
}
spin_unlock_irq(&phba->hbalock);
return 1;
}
/**
* lpfc_sli_host_down: Vport cleanup function.
* @vport: Pointer to virtual port object.
*
* lpfc_sli_host_down is called to clean up the resources
* associated with a vport before destroying virtual
* port data structures.
* This function does following operations:
* - Free discovery resources associated with this virtual
* port.
* - Free iocbs associated with this virtual port in
* the txq.
* - Send abort for all iocb commands associated with this
* vport in txcmplq.
*
* This function is called with no lock held and always returns 1.
**/
int
lpfc_sli_host_down(struct lpfc_vport *vport)
{
LIST_HEAD(completions);
struct lpfc_hba *phba = vport->phba;
struct lpfc_sli *psli = &phba->sli;
struct lpfc_sli_ring *pring;
struct lpfc_iocbq *iocb, *next_iocb;
int i;
unsigned long flags = 0;
uint16_t prev_pring_flag;
lpfc_cleanup_discovery_resources(vport);
spin_lock_irqsave(&phba->hbalock, flags);
for (i = 0; i < psli->num_rings; i++) {
pring = &psli->ring[i];
prev_pring_flag = pring->flag;
/* Only slow rings */
if (pring->ringno == LPFC_ELS_RING) {
pring->flag |= LPFC_DEFERRED_RING_EVENT;
/* Set the lpfc data pending flag */
set_bit(LPFC_DATA_READY, &phba->data_flags);
}
/*
* Error everything on the txq since these iocbs have not been
* given to the FW yet.
*/
list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
if (iocb->vport != vport)
continue;
list_move_tail(&iocb->list, &completions);
pring->txq_cnt--;
}
/* Next issue ABTS for everything on the txcmplq */
list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq,
list) {
if (iocb->vport != vport)
continue;
lpfc_sli_issue_abort_iotag(phba, pring, iocb);
}
pring->flag = prev_pring_flag;
}
spin_unlock_irqrestore(&phba->hbalock, flags);
while (!list_empty(&completions)) {
list_remove_head(&completions, iocb, struct lpfc_iocbq, list);
if (!iocb->iocb_cmpl)
lpfc_sli_release_iocbq(phba, iocb);
else {
iocb->iocb.ulpStatus = IOSTAT_LOCAL_REJECT;
iocb->iocb.un.ulpWord[4] = IOERR_SLI_DOWN;
(iocb->iocb_cmpl) (phba, iocb, iocb);
}
}
return 1;
}
/**
* lpfc_sli_hba_down: Resource cleanup function for the HBA.
* @phba: Pointer to HBA context object.
*
* This function cleans up all iocb, buffers, mailbox commands
* while shutting down the HBA. This function is called with no
* lock held and always returns 1.
* This function does the following to cleanup driver resources:
* - Free discovery resources for each virtual port
* - Cleanup any pending fabric iocbs
* - Iterate through the iocb txq and free each entry
* in the list.
* - Free up any buffer posted to the HBA
* - Free mailbox commands in the mailbox queue.
**/
int
lpfc_sli_hba_down(struct lpfc_hba *phba)
{
LIST_HEAD(completions);
struct lpfc_sli *psli = &phba->sli;
struct lpfc_sli_ring *pring;
struct lpfc_dmabuf *buf_ptr;
LPFC_MBOXQ_t *pmb;
struct lpfc_iocbq *iocb;
IOCB_t *cmd = NULL;
int i;
unsigned long flags = 0;
lpfc_hba_down_prep(phba);
lpfc_fabric_abort_hba(phba);
spin_lock_irqsave(&phba->hbalock, flags);
for (i = 0; i < psli->num_rings; i++) {
pring = &psli->ring[i];
/* Only slow rings */
if (pring->ringno == LPFC_ELS_RING) {
pring->flag |= LPFC_DEFERRED_RING_EVENT;
/* Set the lpfc data pending flag */
set_bit(LPFC_DATA_READY, &phba->data_flags);
}
/*
* Error everything on the txq since these iocbs have not been
* given to the FW yet.
*/
list_splice_init(&pring->txq, &completions);
pring->txq_cnt = 0;
}
spin_unlock_irqrestore(&phba->hbalock, flags);
while (!list_empty(&completions)) {
list_remove_head(&completions, iocb, struct lpfc_iocbq, list);
cmd = &iocb->iocb;
if (!iocb->iocb_cmpl)
lpfc_sli_release_iocbq(phba, iocb);
else {
cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
cmd->un.ulpWord[4] = IOERR_SLI_DOWN;
(iocb->iocb_cmpl) (phba, iocb, iocb);
}
}
spin_lock_irqsave(&phba->hbalock, flags);
list_splice_init(&phba->elsbuf, &completions);
phba->elsbuf_cnt = 0;
phba->elsbuf_prev_cnt = 0;
spin_unlock_irqrestore(&phba->hbalock, flags);
while (!list_empty(&completions)) {
list_remove_head(&completions, buf_ptr,
struct lpfc_dmabuf, list);
lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
kfree(buf_ptr);
}
/* Return any active mbox cmds */
del_timer_sync(&psli->mbox_tmo);
spin_lock_irqsave(&phba->hbalock, flags);
spin_lock(&phba->pport->work_port_lock);
phba->pport->work_port_events &= ~WORKER_MBOX_TMO;
spin_unlock(&phba->pport->work_port_lock);
/* Return any pending or completed mbox cmds */
list_splice_init(&phba->sli.mboxq, &completions);
if (psli->mbox_active) {
list_add_tail(&psli->mbox_active->list, &completions);
psli->mbox_active = NULL;
psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
}
list_splice_init(&phba->sli.mboxq_cmpl, &completions);
spin_unlock_irqrestore(&phba->hbalock, flags);
while (!list_empty(&completions)) {
list_remove_head(&completions, pmb, LPFC_MBOXQ_t, list);
pmb->mb.mbxStatus = MBX_NOT_FINISHED;
if (pmb->mbox_cmpl)
pmb->mbox_cmpl(phba,pmb);
}
return 1;
}
/**
* lpfc_sli_pcimem_bcopy: SLI memory copy function.
* @srcp: Source memory pointer.
* @destp: Destination memory pointer.
* @cnt: Number of words required to be copied.
*
* This function is used for copying data between driver memory
* and the SLI memory. This function also changes the endianness
* of each word if native endianness is different from SLI
* endianness. This function can be called with or without
* lock.
**/
void
lpfc_sli_pcimem_bcopy(void *srcp, void *destp, uint32_t cnt)
{
uint32_t *src = srcp;
uint32_t *dest = destp;
uint32_t ldata;
int i;
for (i = 0; i < (int)cnt; i += sizeof (uint32_t)) {
ldata = *src;
ldata = le32_to_cpu(ldata);
*dest = ldata;
src++;
dest++;
}
}
/**
* lpfc_sli_ringpostbuf_put: Function to add a buffer to postbufq.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @mp: Pointer to driver buffer object.
*
* This function is called with no lock held.
* It always return zero after adding the buffer to the postbufq
* buffer list.
**/
int
lpfc_sli_ringpostbuf_put(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
struct lpfc_dmabuf *mp)
{
/* Stick struct lpfc_dmabuf at end of postbufq so driver can look it up
later */
spin_lock_irq(&phba->hbalock);
list_add_tail(&mp->list, &pring->postbufq);
pring->postbufq_cnt++;
spin_unlock_irq(&phba->hbalock);
return 0;
}
/**
* lpfc_sli_get_buffer_tag: Tag allocation function for a buffer posted
* using CMD_QUE_XRI64_CX iocb.
* @phba: Pointer to HBA context object.
*
* When HBQ is enabled, buffers are searched based on tags. This function
* allocates a tag for buffer posted using CMD_QUE_XRI64_CX iocb. The
* tag is bit wise or-ed with QUE_BUFTAG_BIT to make sure that the tag
* does not conflict with tags of buffer posted for unsolicited events.
* The function returns the allocated tag. The function is called with
* no locks held.
**/
uint32_t
lpfc_sli_get_buffer_tag(struct lpfc_hba *phba)
{
spin_lock_irq(&phba->hbalock);
phba->buffer_tag_count++;
/*
* Always set the QUE_BUFTAG_BIT to distiguish between
* a tag assigned by HBQ.
*/
phba->buffer_tag_count |= QUE_BUFTAG_BIT;
spin_unlock_irq(&phba->hbalock);
return phba->buffer_tag_count;
}
/**
* lpfc_sli_ring_taggedbuf_get: Search HBQ buffer associated with
* posted using CMD_QUE_XRI64_CX iocb.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @tag: Buffer tag.
*
* Buffers posted using CMD_QUE_XRI64_CX iocb are in pring->postbufq
* list. After HBA DMA data to these buffers, CMD_IOCB_RET_XRI64_CX
* iocb is posted to the response ring with the tag of the buffer.
* This function searches the pring->postbufq list using the tag
* to find buffer associated with CMD_IOCB_RET_XRI64_CX
* iocb. If the buffer is found then lpfc_dmabuf object of the
* buffer is returned to the caller else NULL is returned.
* This function is called with no lock held.
**/
struct lpfc_dmabuf *
lpfc_sli_ring_taggedbuf_get(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
uint32_t tag)
{
struct lpfc_dmabuf *mp, *next_mp;
struct list_head *slp = &pring->postbufq;
/* Search postbufq, from the begining, looking for a match on tag */
spin_lock_irq(&phba->hbalock);
list_for_each_entry_safe(mp, next_mp, &pring->postbufq, list) {
if (mp->buffer_tag == tag) {
list_del_init(&mp->list);
pring->postbufq_cnt--;
spin_unlock_irq(&phba->hbalock);
return mp;
}
}
spin_unlock_irq(&phba->hbalock);
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"0402 Cannot find virtual addr for buffer tag on "
"ring %d Data x%lx x%p x%p x%x\n",
pring->ringno, (unsigned long) tag,
slp->next, slp->prev, pring->postbufq_cnt);
return NULL;
}
/**
* lpfc_sli_ringpostbuf_get: SLI2 buffer search function for
* unsolicited ct and els events.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @phys: DMA address of the buffer.
*
* This function searches the buffer list using the dma_address
* of unsolicited event to find the driver's lpfc_dmabuf object
* corresponding to the dma_address. The function returns the
* lpfc_dmabuf object if a buffer is found else it returns NULL.
* This function is called by the ct and els unsolicited event
* handlers to get the buffer associated with the unsolicited
* event.
*
* This function is called with no lock held.
**/
struct lpfc_dmabuf *
lpfc_sli_ringpostbuf_get(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
dma_addr_t phys)
{
struct lpfc_dmabuf *mp, *next_mp;
struct list_head *slp = &pring->postbufq;
/* Search postbufq, from the begining, looking for a match on phys */
spin_lock_irq(&phba->hbalock);
list_for_each_entry_safe(mp, next_mp, &pring->postbufq, list) {
if (mp->phys == phys) {
list_del_init(&mp->list);
pring->postbufq_cnt--;
spin_unlock_irq(&phba->hbalock);
return mp;
}
}
spin_unlock_irq(&phba->hbalock);
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"0410 Cannot find virtual addr for mapped buf on "
"ring %d Data x%llx x%p x%p x%x\n",
pring->ringno, (unsigned long long)phys,
slp->next, slp->prev, pring->postbufq_cnt);
return NULL;
}
/**
* lpfc_sli_abort_els_cmpl: Completion handler for the els abort iocbs.
* @phba: Pointer to HBA context object.
* @cmdiocb: Pointer to driver command iocb object.
* @rspiocb: Pointer to driver response iocb object.
*
* This function is the completion handler for the abort iocbs for
* ELS commands. This function is called from the ELS ring event
* handler with no lock held. This function frees memory resources
* associated with the abort iocb.
**/
static void
lpfc_sli_abort_els_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
struct lpfc_iocbq *rspiocb)
{
IOCB_t *irsp = &rspiocb->iocb;
uint16_t abort_iotag, abort_context;
struct lpfc_iocbq *abort_iocb;
struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
abort_iocb = NULL;
if (irsp->ulpStatus) {
abort_context = cmdiocb->iocb.un.acxri.abortContextTag;
abort_iotag = cmdiocb->iocb.un.acxri.abortIoTag;
spin_lock_irq(&phba->hbalock);
if (abort_iotag != 0 && abort_iotag <= phba->sli.last_iotag)
abort_iocb = phba->sli.iocbq_lookup[abort_iotag];
lpfc_printf_log(phba, KERN_INFO, LOG_ELS | LOG_SLI,
"0327 Cannot abort els iocb %p "
"with tag %x context %x, abort status %x, "
"abort code %x\n",
abort_iocb, abort_iotag, abort_context,
irsp->ulpStatus, irsp->un.ulpWord[4]);
/*
* If the iocb is not found in Firmware queue the iocb
* might have completed already. Do not free it again.
*/
if (irsp->ulpStatus == IOSTAT_LOCAL_REJECT) {
spin_unlock_irq(&phba->hbalock);
lpfc_sli_release_iocbq(phba, cmdiocb);
return;
}
/*
* make sure we have the right iocbq before taking it
* off the txcmplq and try to call completion routine.
*/
if (!abort_iocb ||
abort_iocb->iocb.ulpContext != abort_context ||
(abort_iocb->iocb_flag & LPFC_DRIVER_ABORTED) == 0)
spin_unlock_irq(&phba->hbalock);
else {
list_del_init(&abort_iocb->list);
pring->txcmplq_cnt--;
spin_unlock_irq(&phba->hbalock);
/* Firmware could still be in progress of DMAing
* payload, so don't free data buffer till after
* a hbeat.
*/
abort_iocb->iocb_flag |= LPFC_DELAY_MEM_FREE;
abort_iocb->iocb_flag &= ~LPFC_DRIVER_ABORTED;
abort_iocb->iocb.ulpStatus = IOSTAT_LOCAL_REJECT;
abort_iocb->iocb.un.ulpWord[4] = IOERR_SLI_ABORTED;
(abort_iocb->iocb_cmpl)(phba, abort_iocb, abort_iocb);
}
}
lpfc_sli_release_iocbq(phba, cmdiocb);
return;
}
/**
* lpfc_ignore_els_cmpl: Completion handler for aborted ELS command.
* @phba: Pointer to HBA context object.
* @cmdiocb: Pointer to driver command iocb object.
* @rspiocb: Pointer to driver response iocb object.
*
* The function is called from SLI ring event handler with no
* lock held. This function is the completion handler for ELS commands
* which are aborted. The function frees memory resources used for
* the aborted ELS commands.
**/
static void
lpfc_ignore_els_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
struct lpfc_iocbq *rspiocb)
{
IOCB_t *irsp = &rspiocb->iocb;
/* ELS cmd tag <ulpIoTag> completes */
lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
"0139 Ignoring ELS cmd tag x%x completion Data: "
"x%x x%x x%x\n",
irsp->ulpIoTag, irsp->ulpStatus,
irsp->un.ulpWord[4], irsp->ulpTimeout);
if (cmdiocb->iocb.ulpCommand == CMD_GEN_REQUEST64_CR)
lpfc_ct_free_iocb(phba, cmdiocb);
else
lpfc_els_free_iocb(phba, cmdiocb);
return;
}
/**
* lpfc_sli_issue_abort_iotag: Abort function for a command iocb.
* @phba: Pointer to HBA context object.
* @pring: Pointer to driver SLI ring object.
* @cmdiocb: Pointer to driver command iocb object.
*
* This function issues an abort iocb for the provided command
* iocb. This function is called with hbalock held.
* The function returns 0 when it fails due to memory allocation
* failure or when the command iocb is an abort request.
**/
int
lpfc_sli_issue_abort_iotag(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
struct lpfc_iocbq *cmdiocb)
{
struct lpfc_vport *vport = cmdiocb->vport;
struct lpfc_iocbq *abtsiocbp;
IOCB_t *icmd = NULL;
IOCB_t *iabt = NULL;
int retval = IOCB_ERROR;
/*
* There are certain command types we don't want to abort. And we
* don't want to abort commands that are already in the process of
* being aborted.
*/
icmd = &cmdiocb->iocb;
if (icmd->ulpCommand == CMD_ABORT_XRI_CN ||
icmd->ulpCommand == CMD_CLOSE_XRI_CN ||
(cmdiocb->iocb_flag & LPFC_DRIVER_ABORTED) != 0)
return 0;
/* If we're unloading, don't abort iocb on the ELS ring, but change the
* callback so that nothing happens when it finishes.
*/
if ((vport->load_flag & FC_UNLOADING) &&
(pring->ringno == LPFC_ELS_RING)) {
if (cmdiocb->iocb_flag & LPFC_IO_FABRIC)
cmdiocb->fabric_iocb_cmpl = lpfc_ignore_els_cmpl;
else
cmdiocb->iocb_cmpl = lpfc_ignore_els_cmpl;
goto abort_iotag_exit;
}
/* issue ABTS for this IOCB based on iotag */
abtsiocbp = __lpfc_sli_get_iocbq(phba);
if (abtsiocbp == NULL)
return 0;
/* This signals the response to set the correct status
* before calling the completion handler.
*/
cmdiocb->iocb_flag |= LPFC_DRIVER_ABORTED;
iabt = &abtsiocbp->iocb;
iabt->un.acxri.abortType = ABORT_TYPE_ABTS;
iabt->un.acxri.abortContextTag = icmd->ulpContext;
iabt->un.acxri.abortIoTag = icmd->ulpIoTag;
iabt->ulpLe = 1;
iabt->ulpClass = icmd->ulpClass;
if (phba->link_state >= LPFC_LINK_UP)
iabt->ulpCommand = CMD_ABORT_XRI_CN;
else
iabt->ulpCommand = CMD_CLOSE_XRI_CN;
abtsiocbp->iocb_cmpl = lpfc_sli_abort_els_cmpl;
lpfc_printf_vlog(vport, KERN_INFO, LOG_SLI,
"0339 Abort xri x%x, original iotag x%x, "
"abort cmd iotag x%x\n",
iabt->un.acxri.abortContextTag,
iabt->un.acxri.abortIoTag, abtsiocbp->iotag);
retval = __lpfc_sli_issue_iocb(phba, pring, abtsiocbp, 0);
if (retval)
__lpfc_sli_release_iocbq(phba, abtsiocbp);
abort_iotag_exit:
/*
* Caller to this routine should check for IOCB_ERROR
* and handle it properly. This routine no longer removes
* iocb off txcmplq and call compl in case of IOCB_ERROR.
*/
return retval;
}
/**
* lpfc_sli_validate_fcp_iocb: Filtering function, used to find commands
* associated with a vport/SCSI target/lun.
* @iocbq: Pointer to driver iocb object.
* @vport: Pointer to driver virtual port object.
* @tgt_id: SCSI ID of the target.
* @lun_id: LUN ID of the scsi device.
* @ctx_cmd: LPFC_CTX_LUN/LPFC_CTX_TGT/LPFC_CTX_HOST
*
* This function acts as iocb filter for functions which abort or count
* all FCP iocbs pending on a lun/SCSI target/SCSI host. It will return
* 0 if the filtering criteria is met for the given iocb and will return
* 1 if the filtering criteria is not met.
* If ctx_cmd == LPFC_CTX_LUN, the function returns 0 only if the
* given iocb is for the SCSI device specified by vport, tgt_id and
* lun_id parameter.
* If ctx_cmd == LPFC_CTX_TGT, the function returns 0 only if the
* given iocb is for the SCSI target specified by vport and tgt_id
* parameters.
* If ctx_cmd == LPFC_CTX_HOST, the function returns 0 only if the
* given iocb is for the SCSI host associated with the given vport.
* This function is called with no locks held.
**/
static int
lpfc_sli_validate_fcp_iocb(struct lpfc_iocbq *iocbq, struct lpfc_vport *vport,
uint16_t tgt_id, uint64_t lun_id,
lpfc_ctx_cmd ctx_cmd)
{
struct lpfc_scsi_buf *lpfc_cmd;
int rc = 1;
if (!(iocbq->iocb_flag & LPFC_IO_FCP))
return rc;
if (iocbq->vport != vport)
return rc;
lpfc_cmd = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
if (lpfc_cmd->pCmd == NULL)
return rc;
switch (ctx_cmd) {
case LPFC_CTX_LUN:
if ((lpfc_cmd->rdata->pnode) &&
(lpfc_cmd->rdata->pnode->nlp_sid == tgt_id) &&
(scsilun_to_int(&lpfc_cmd->fcp_cmnd->fcp_lun) == lun_id))
rc = 0;
break;
case LPFC_CTX_TGT:
if ((lpfc_cmd->rdata->pnode) &&
(lpfc_cmd->rdata->pnode->nlp_sid == tgt_id))
rc = 0;
break;
case LPFC_CTX_HOST:
rc = 0;
break;
default:
printk(KERN_ERR "%s: Unknown context cmd type, value %d\n",
__func__, ctx_cmd);
break;
}
return rc;
}
/**
* lpfc_sli_sum_iocb: Function to count the number of FCP iocbs pending.
* @vport: Pointer to virtual port.
* @tgt_id: SCSI ID of the target.
* @lun_id: LUN ID of the scsi device.
* @ctx_cmd: LPFC_CTX_LUN/LPFC_CTX_TGT/LPFC_CTX_HOST.
*
* This function returns number of FCP commands pending for the vport.
* When ctx_cmd == LPFC_CTX_LUN, the function returns number of FCP
* commands pending on the vport associated with SCSI device specified
* by tgt_id and lun_id parameters.
* When ctx_cmd == LPFC_CTX_TGT, the function returns number of FCP
* commands pending on the vport associated with SCSI target specified
* by tgt_id parameter.
* When ctx_cmd == LPFC_CTX_HOST, the function returns number of FCP
* commands pending on the vport.
* This function returns the number of iocbs which satisfy the filter.
* This function is called without any lock held.
**/
int
lpfc_sli_sum_iocb(struct lpfc_vport *vport, uint16_t tgt_id, uint64_t lun_id,
lpfc_ctx_cmd ctx_cmd)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_iocbq *iocbq;
int sum, i;
for (i = 1, sum = 0; i <= phba->sli.last_iotag; i++) {
iocbq = phba->sli.iocbq_lookup[i];
if (lpfc_sli_validate_fcp_iocb (iocbq, vport, tgt_id, lun_id,
ctx_cmd) == 0)
sum++;
}
return sum;
}
/**
* lpfc_sli_abort_fcp_cmpl: Completion handler function for an aborted
* FCP iocb.
* @phba: Pointer to HBA context object
* @cmdiocb: Pointer to command iocb object.
* @rspiocb: Pointer to response iocb object.
*
* This function is called when an aborted FCP iocb completes. This
* function is called by the ring event handler with no lock held.
* This function frees the iocb.
**/
void
lpfc_sli_abort_fcp_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
struct lpfc_iocbq *rspiocb)
{
lpfc_sli_release_iocbq(phba, cmdiocb);
return;
}
/**
* lpfc_sli_abort_iocb: This function issue abort for all SCSI commands
* pending on a SCSI host(vport)/target/lun.
* @vport: Pointer to virtual port.
* @pring: Pointer to driver SLI ring object.
* @tgt_id: SCSI ID of the target.
* @lun_id: LUN ID of the scsi device.
* @abort_cmd: LPFC_CTX_LUN/LPFC_CTX_TGT/LPFC_CTX_HOST.
*
* This function sends an abort command for every SCSI command
* associated with the given virtual port pending on the ring
* filtered by lpfc_sli_validate_fcp_iocb function.
* When abort_cmd == LPFC_CTX_LUN, the function sends abort only to the
* FCP iocbs associated with lun specified by tgt_id and lun_id
* parameters
* When abort_cmd == LPFC_CTX_TGT, the function sends abort only to the
* FCP iocbs associated with SCSI target specified by tgt_id parameter.
* When abort_cmd == LPFC_CTX_HOST, the function sends abort to all
* FCP iocbs associated with virtual port.
* This function returns number of iocbs it failed to abort.
* This function is called with no locks held.
**/
int
lpfc_sli_abort_iocb(struct lpfc_vport *vport, struct lpfc_sli_ring *pring,
uint16_t tgt_id, uint64_t lun_id, lpfc_ctx_cmd abort_cmd)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_iocbq *iocbq;
struct lpfc_iocbq *abtsiocb;
IOCB_t *cmd = NULL;
int errcnt = 0, ret_val = 0;
int i;
for (i = 1; i <= phba->sli.last_iotag; i++) {
iocbq = phba->sli.iocbq_lookup[i];
if (lpfc_sli_validate_fcp_iocb(iocbq, vport, tgt_id, lun_id,
abort_cmd) != 0)
continue;
/* issue ABTS for this IOCB based on iotag */
abtsiocb = lpfc_sli_get_iocbq(phba);
if (abtsiocb == NULL) {
errcnt++;
continue;
}
cmd = &iocbq->iocb;
abtsiocb->iocb.un.acxri.abortType = ABORT_TYPE_ABTS;
abtsiocb->iocb.un.acxri.abortContextTag = cmd->ulpContext;
abtsiocb->iocb.un.acxri.abortIoTag = cmd->ulpIoTag;
abtsiocb->iocb.ulpLe = 1;
abtsiocb->iocb.ulpClass = cmd->ulpClass;
abtsiocb->vport = phba->pport;
if (lpfc_is_link_up(phba))
abtsiocb->iocb.ulpCommand = CMD_ABORT_XRI_CN;
else
abtsiocb->iocb.ulpCommand = CMD_CLOSE_XRI_CN;
/* Setup callback routine and issue the command. */
abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
ret_val = lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0);
if (ret_val == IOCB_ERROR) {
lpfc_sli_release_iocbq(phba, abtsiocb);
errcnt++;
continue;
}
}
return errcnt;
}
/**
* lpfc_sli_wake_iocb_wait: iocb completion handler for iocb issued using
* lpfc_sli_issue_iocb_wait.
* @phba: Pointer to HBA context object.
* @cmdiocbq: Pointer to command iocb.
* @rspiocbq: Pointer to response iocb.
*
* This function is the completion handler for iocbs issued using
* lpfc_sli_issue_iocb_wait function. This function is called by the
* ring event handler function without any lock held. This function
* can be called from both worker thread context and interrupt
* context. This function also can be called from other thread which
* cleans up the SLI layer objects.
* This function copy the contents of the response iocb to the
* response iocb memory object provided by the caller of
* lpfc_sli_issue_iocb_wait and then wakes up the thread which
* sleeps for the iocb completion.
**/
static void
lpfc_sli_wake_iocb_wait(struct lpfc_hba *phba,
struct lpfc_iocbq *cmdiocbq,
struct lpfc_iocbq *rspiocbq)
{
wait_queue_head_t *pdone_q;
unsigned long iflags;
spin_lock_irqsave(&phba->hbalock, iflags);
cmdiocbq->iocb_flag |= LPFC_IO_WAKE;
if (cmdiocbq->context2 && rspiocbq)
memcpy(&((struct lpfc_iocbq *)cmdiocbq->context2)->iocb,
&rspiocbq->iocb, sizeof(IOCB_t));
pdone_q = cmdiocbq->context_un.wait_queue;
if (pdone_q)
wake_up(pdone_q);
spin_unlock_irqrestore(&phba->hbalock, iflags);
return;
}
/**
* lpfc_sli_issue_iocb_wait: Synchronous function to issue iocb commands.
* @phba: Pointer to HBA context object..
* @pring: Pointer to sli ring.
* @piocb: Pointer to command iocb.
* @prspiocbq: Pointer to response iocb.
* @timeout: Timeout in number of seconds.
*
* This function issues the iocb to firmware and waits for the
* iocb to complete. If the iocb command is not
* completed within timeout seconds, it returns IOCB_TIMEDOUT.
* Caller should not free the iocb resources if this function
* returns IOCB_TIMEDOUT.
* The function waits for the iocb completion using an
* non-interruptible wait.
* This function will sleep while waiting for iocb completion.
* So, this function should not be called from any context which
* does not allow sleeping. Due to the same reason, this function
* cannot be called with interrupt disabled.
* This function assumes that the iocb completions occur while
* this function sleep. So, this function cannot be called from
* the thread which process iocb completion for this ring.
* This function clears the iocb_flag of the iocb object before
* issuing the iocb and the iocb completion handler sets this
* flag and wakes this thread when the iocb completes.
* The contents of the response iocb will be copied to prspiocbq
* by the completion handler when the command completes.
* This function returns IOCB_SUCCESS when success.
* This function is called with no lock held.
**/
int
lpfc_sli_issue_iocb_wait(struct lpfc_hba *phba,
struct lpfc_sli_ring *pring,
struct lpfc_iocbq *piocb,
struct lpfc_iocbq *prspiocbq,
uint32_t timeout)
{
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_q);
long timeleft, timeout_req = 0;
int retval = IOCB_SUCCESS;
uint32_t creg_val;
/*
* If the caller has provided a response iocbq buffer, then context2
* is NULL or its an error.
*/
if (prspiocbq) {
if (piocb->context2)
return IOCB_ERROR;
piocb->context2 = prspiocbq;
}
piocb->iocb_cmpl = lpfc_sli_wake_iocb_wait;
piocb->context_un.wait_queue = &done_q;
piocb->iocb_flag &= ~LPFC_IO_WAKE;
if (phba->cfg_poll & DISABLE_FCP_RING_INT) {
creg_val = readl(phba->HCregaddr);
creg_val |= (HC_R0INT_ENA << LPFC_FCP_RING);
writel(creg_val, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
}
retval = lpfc_sli_issue_iocb(phba, pring, piocb, 0);
if (retval == IOCB_SUCCESS) {
timeout_req = timeout * HZ;
timeleft = wait_event_timeout(done_q,
piocb->iocb_flag & LPFC_IO_WAKE,
timeout_req);
if (piocb->iocb_flag & LPFC_IO_WAKE) {
lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
"0331 IOCB wake signaled\n");
} else if (timeleft == 0) {
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"0338 IOCB wait timeout error - no "
"wake response Data x%x\n", timeout);
retval = IOCB_TIMEDOUT;
} else {
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"0330 IOCB wake NOT set, "
"Data x%x x%lx\n",
timeout, (timeleft / jiffies));
retval = IOCB_TIMEDOUT;
}
} else {
lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
"0332 IOCB wait issue failed, Data x%x\n",
retval);
retval = IOCB_ERROR;
}
if (phba->cfg_poll & DISABLE_FCP_RING_INT) {
creg_val = readl(phba->HCregaddr);
creg_val &= ~(HC_R0INT_ENA << LPFC_FCP_RING);
writel(creg_val, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
}
if (prspiocbq)
piocb->context2 = NULL;
piocb->context_un.wait_queue = NULL;
piocb->iocb_cmpl = NULL;
return retval;
}
/**
* lpfc_sli_issue_mbox_wait: Synchronous function to issue mailbox.
* @phba: Pointer to HBA context object.
* @pmboxq: Pointer to driver mailbox object.
* @timeout: Timeout in number of seconds.
*
* This function issues the mailbox to firmware and waits for the
* mailbox command to complete. If the mailbox command is not
* completed within timeout seconds, it returns MBX_TIMEOUT.
* The function waits for the mailbox completion using an
* interruptible wait. If the thread is woken up due to a
* signal, MBX_TIMEOUT error is returned to the caller. Caller
* should not free the mailbox resources, if this function returns
* MBX_TIMEOUT.
* This function will sleep while waiting for mailbox completion.
* So, this function should not be called from any context which
* does not allow sleeping. Due to the same reason, this function
* cannot be called with interrupt disabled.
* This function assumes that the mailbox completion occurs while
* this function sleep. So, this function cannot be called from
* the worker thread which processes mailbox completion.
* This function is called in the context of HBA management
* applications.
* This function returns MBX_SUCCESS when successful.
* This function is called with no lock held.
**/
int
lpfc_sli_issue_mbox_wait(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq,
uint32_t timeout)
{
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_q);
int retval;
unsigned long flag;
/* The caller must leave context1 empty. */
if (pmboxq->context1)
return MBX_NOT_FINISHED;
pmboxq->mbox_flag &= ~LPFC_MBX_WAKE;
/* setup wake call as IOCB callback */
pmboxq->mbox_cmpl = lpfc_sli_wake_mbox_wait;
/* setup context field to pass wait_queue pointer to wake function */
pmboxq->context1 = &done_q;
/* now issue the command */
retval = lpfc_sli_issue_mbox(phba, pmboxq, MBX_NOWAIT);
if (retval == MBX_BUSY || retval == MBX_SUCCESS) {
wait_event_interruptible_timeout(done_q,
pmboxq->mbox_flag & LPFC_MBX_WAKE,
timeout * HZ);
spin_lock_irqsave(&phba->hbalock, flag);
pmboxq->context1 = NULL;
/*
* if LPFC_MBX_WAKE flag is set the mailbox is completed
* else do not free the resources.
*/
if (pmboxq->mbox_flag & LPFC_MBX_WAKE)
retval = MBX_SUCCESS;
else {
retval = MBX_TIMEOUT;
pmboxq->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
}
spin_unlock_irqrestore(&phba->hbalock, flag);
}
return retval;
}
/**
* lpfc_sli_flush_mbox_queue: mailbox queue cleanup function.
* @phba: Pointer to HBA context.
*
* This function is called to cleanup any pending mailbox
* objects in the driver queue before bringing the HBA offline.
* This function is called while resetting the HBA.
* The function is called without any lock held. The function
* takes hbalock to update SLI data structure.
* This function returns 1 when there is an active mailbox
* command pending else returns 0.
**/
int
lpfc_sli_flush_mbox_queue(struct lpfc_hba * phba)
{
struct lpfc_vport *vport = phba->pport;
int i = 0;
uint32_t ha_copy;
while (phba->sli.sli_flag & LPFC_SLI_MBOX_ACTIVE && !vport->stopped) {
if (i++ > LPFC_MBOX_TMO * 1000)
return 1;
/*
* Call lpfc_sli_handle_mb_event only if a mailbox cmd
* did finish. This way we won't get the misleading
* "Stray Mailbox Interrupt" message.
*/
spin_lock_irq(&phba->hbalock);
ha_copy = phba->work_ha;
phba->work_ha &= ~HA_MBATT;
spin_unlock_irq(&phba->hbalock);
if (ha_copy & HA_MBATT)
if (lpfc_sli_handle_mb_event(phba) == 0)
i = 0;
msleep(1);
}
return (phba->sli.sli_flag & LPFC_SLI_MBOX_ACTIVE) ? 1 : 0;
}
/**
* lpfc_sli_check_eratt: check error attention events
* @phba: Pointer to HBA context.
*
* This function is called form timer soft interrupt context to check HBA's
* error attention register bit for error attention events.
*
* This fucntion returns 1 when there is Error Attention in the Host Attention
* Register and returns 0 otherwise.
**/
int
lpfc_sli_check_eratt(struct lpfc_hba *phba)
{
uint32_t ha_copy;
/* If PCI channel is offline, don't process it */
if (unlikely(pci_channel_offline(phba->pcidev)))
return 0;
/* If somebody is waiting to handle an eratt, don't process it
* here. The brdkill function will do this.
*/
if (phba->link_flag & LS_IGNORE_ERATT)
return 0;
/* Check if interrupt handler handles this ERATT */
spin_lock_irq(&phba->hbalock);
if (phba->hba_flag & HBA_ERATT_HANDLED) {
/* Interrupt handler has handled ERATT */
spin_unlock_irq(&phba->hbalock);
return 0;
}
/* Read chip Host Attention (HA) register */
ha_copy = readl(phba->HAregaddr);
if (ha_copy & HA_ERATT) {
/* Read host status register to retrieve error event */
lpfc_sli_read_hs(phba);
/* Set the driver HA work bitmap */
phba->work_ha |= HA_ERATT;
/* Indicate polling handles this ERATT */
phba->hba_flag |= HBA_ERATT_HANDLED;
spin_unlock_irq(&phba->hbalock);
return 1;
}
spin_unlock_irq(&phba->hbalock);
return 0;
}
/**
* lpfc_sp_intr_handler: The slow-path interrupt handler of lpfc driver.
* @irq: Interrupt number.
* @dev_id: The device context pointer.
*
* This function is directly called from the PCI layer as an interrupt
* service routine when the device is enabled with MSI-X multi-message
* interrupt mode and there are slow-path events in the HBA. However,
* when the device is enabled with either MSI or Pin-IRQ interrupt mode,
* this function is called as part of the device-level interrupt handler.
* When the PCI slot is in error recovery or the HBA is undergoing
* initialization, the interrupt handler will not process the interrupt.
* The link attention and ELS ring attention events are handled by the
* worker thread. The interrupt handler signals the worker thread and
* and returns for these events. This function is called without any
* lock held. It gets the hbalock to access and update SLI data
* structures.
*
* This function returns IRQ_HANDLED when interrupt is handled else it
* returns IRQ_NONE.
**/
irqreturn_t
lpfc_sp_intr_handler(int irq, void *dev_id)
{
struct lpfc_hba *phba;
uint32_t ha_copy;
uint32_t work_ha_copy;
unsigned long status;
unsigned long iflag;
uint32_t control;
MAILBOX_t *mbox, *pmbox;
struct lpfc_vport *vport;
struct lpfc_nodelist *ndlp;
struct lpfc_dmabuf *mp;
LPFC_MBOXQ_t *pmb;
int rc;
/*
* Get the driver's phba structure from the dev_id and
* assume the HBA is not interrupting.
*/
phba = (struct lpfc_hba *)dev_id;
if (unlikely(!phba))
return IRQ_NONE;
/*
* Stuff needs to be attented to when this function is invoked as an
* individual interrupt handler in MSI-X multi-message interrupt mode
*/
if (phba->intr_type == MSIX) {
/* If the pci channel is offline, ignore all the interrupts */
if (unlikely(pci_channel_offline(phba->pcidev)))
return IRQ_NONE;
/* Update device-level interrupt statistics */
phba->sli.slistat.sli_intr++;
/* Ignore all interrupts during initialization. */
if (unlikely(phba->link_state < LPFC_LINK_DOWN))
return IRQ_NONE;
/* Need to read HA REG for slow-path events */
spin_lock_irqsave(&phba->hbalock, iflag);
ha_copy = readl(phba->HAregaddr);
/* If somebody is waiting to handle an eratt don't process it
* here. The brdkill function will do this.
*/
if (phba->link_flag & LS_IGNORE_ERATT)
ha_copy &= ~HA_ERATT;
/* Check the need for handling ERATT in interrupt handler */
if (ha_copy & HA_ERATT) {
if (phba->hba_flag & HBA_ERATT_HANDLED)
/* ERATT polling has handled ERATT */
ha_copy &= ~HA_ERATT;
else
/* Indicate interrupt handler handles ERATT */
phba->hba_flag |= HBA_ERATT_HANDLED;
}
/* Clear up only attention source related to slow-path */
writel((ha_copy & (HA_MBATT | HA_R2_CLR_MSK)),
phba->HAregaddr);
readl(phba->HAregaddr); /* flush */
spin_unlock_irqrestore(&phba->hbalock, iflag);
} else
ha_copy = phba->ha_copy;
work_ha_copy = ha_copy & phba->work_ha_mask;
if (work_ha_copy) {
if (work_ha_copy & HA_LATT) {
if (phba->sli.sli_flag & LPFC_PROCESS_LA) {
/*
* Turn off Link Attention interrupts
* until CLEAR_LA done
*/
spin_lock_irqsave(&phba->hbalock, iflag);
phba->sli.sli_flag &= ~LPFC_PROCESS_LA;
control = readl(phba->HCregaddr);
control &= ~HC_LAINT_ENA;
writel(control, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
spin_unlock_irqrestore(&phba->hbalock, iflag);
}
else
work_ha_copy &= ~HA_LATT;
}
if (work_ha_copy & ~(HA_ERATT | HA_MBATT | HA_LATT)) {
/*
* Turn off Slow Rings interrupts, LPFC_ELS_RING is
* the only slow ring.
*/
status = (work_ha_copy &
(HA_RXMASK << (4*LPFC_ELS_RING)));
status >>= (4*LPFC_ELS_RING);
if (status & HA_RXMASK) {
spin_lock_irqsave(&phba->hbalock, iflag);
control = readl(phba->HCregaddr);
lpfc_debugfs_slow_ring_trc(phba,
"ISR slow ring: ctl:x%x stat:x%x isrcnt:x%x",
control, status,
(uint32_t)phba->sli.slistat.sli_intr);
if (control & (HC_R0INT_ENA << LPFC_ELS_RING)) {
lpfc_debugfs_slow_ring_trc(phba,
"ISR Disable ring:"
"pwork:x%x hawork:x%x wait:x%x",
phba->work_ha, work_ha_copy,
(uint32_t)((unsigned long)
&phba->work_waitq));
control &=
~(HC_R0INT_ENA << LPFC_ELS_RING);
writel(control, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
}
else {
lpfc_debugfs_slow_ring_trc(phba,
"ISR slow ring: pwork:"
"x%x hawork:x%x wait:x%x",
phba->work_ha, work_ha_copy,
(uint32_t)((unsigned long)
&phba->work_waitq));
}
spin_unlock_irqrestore(&phba->hbalock, iflag);
}
}
spin_lock_irqsave(&phba->hbalock, iflag);
if (work_ha_copy & HA_ERATT)
lpfc_sli_read_hs(phba);
if ((work_ha_copy & HA_MBATT) && (phba->sli.mbox_active)) {
pmb = phba->sli.mbox_active;
pmbox = &pmb->mb;
mbox = phba->mbox;
vport = pmb->vport;
/* First check out the status word */
lpfc_sli_pcimem_bcopy(mbox, pmbox, sizeof(uint32_t));
if (pmbox->mbxOwner != OWN_HOST) {
spin_unlock_irqrestore(&phba->hbalock, iflag);
/*
* Stray Mailbox Interrupt, mbxCommand <cmd>
* mbxStatus <status>
*/
lpfc_printf_log(phba, KERN_ERR, LOG_MBOX |
LOG_SLI,
"(%d):0304 Stray Mailbox "
"Interrupt mbxCommand x%x "
"mbxStatus x%x\n",
(vport ? vport->vpi : 0),
pmbox->mbxCommand,
pmbox->mbxStatus);
/* clear mailbox attention bit */
work_ha_copy &= ~HA_MBATT;
} else {
phba->sli.mbox_active = NULL;
spin_unlock_irqrestore(&phba->hbalock, iflag);
phba->last_completion_time = jiffies;
del_timer(&phba->sli.mbox_tmo);
if (pmb->mbox_cmpl) {
lpfc_sli_pcimem_bcopy(mbox, pmbox,
MAILBOX_CMD_SIZE);
}
if (pmb->mbox_flag & LPFC_MBX_IMED_UNREG) {
pmb->mbox_flag &= ~LPFC_MBX_IMED_UNREG;
lpfc_debugfs_disc_trc(vport,
LPFC_DISC_TRC_MBOX_VPORT,
"MBOX dflt rpi: : "
"status:x%x rpi:x%x",
(uint32_t)pmbox->mbxStatus,
pmbox->un.varWords[0], 0);
if (!pmbox->mbxStatus) {
mp = (struct lpfc_dmabuf *)
(pmb->context1);
ndlp = (struct lpfc_nodelist *)
pmb->context2;
/* Reg_LOGIN of dflt RPI was
* successful. new lets get
* rid of the RPI using the
* same mbox buffer.
*/
lpfc_unreg_login(phba,
vport->vpi,
pmbox->un.varWords[0],
pmb);
pmb->mbox_cmpl =
lpfc_mbx_cmpl_dflt_rpi;
pmb->context1 = mp;
pmb->context2 = ndlp;
pmb->vport = vport;
rc = lpfc_sli_issue_mbox(phba,
pmb,
MBX_NOWAIT);
if (rc != MBX_BUSY)
lpfc_printf_log(phba,
KERN_ERR,
LOG_MBOX | LOG_SLI,
"0350 rc should have"
"been MBX_BUSY");
goto send_current_mbox;
}
}
spin_lock_irqsave(
&phba->pport->work_port_lock,
iflag);
phba->pport->work_port_events &=
~WORKER_MBOX_TMO;
spin_unlock_irqrestore(
&phba->pport->work_port_lock,
iflag);
lpfc_mbox_cmpl_put(phba, pmb);
}
} else
spin_unlock_irqrestore(&phba->hbalock, iflag);
if ((work_ha_copy & HA_MBATT) &&
(phba->sli.mbox_active == NULL)) {
send_current_mbox:
/* Process next mailbox command if there is one */
do {
rc = lpfc_sli_issue_mbox(phba, NULL,
MBX_NOWAIT);
} while (rc == MBX_NOT_FINISHED);
if (rc != MBX_SUCCESS)
lpfc_printf_log(phba, KERN_ERR, LOG_MBOX |
LOG_SLI, "0349 rc should be "
"MBX_SUCCESS");
}
spin_lock_irqsave(&phba->hbalock, iflag);
phba->work_ha |= work_ha_copy;
spin_unlock_irqrestore(&phba->hbalock, iflag);
lpfc_worker_wake_up(phba);
}
return IRQ_HANDLED;
} /* lpfc_sp_intr_handler */
/**
* lpfc_fp_intr_handler: The fast-path interrupt handler of lpfc driver.
* @irq: Interrupt number.
* @dev_id: The device context pointer.
*
* This function is directly called from the PCI layer as an interrupt
* service routine when the device is enabled with MSI-X multi-message
* interrupt mode and there is a fast-path FCP IOCB ring event in the
* HBA. However, when the device is enabled with either MSI or Pin-IRQ
* interrupt mode, this function is called as part of the device-level
* interrupt handler. When the PCI slot is in error recovery or the HBA
* is undergoing initialization, the interrupt handler will not process
* the interrupt. The SCSI FCP fast-path ring event are handled in the
* intrrupt context. This function is called without any lock held. It
* gets the hbalock to access and update SLI data structures.
*
* This function returns IRQ_HANDLED when interrupt is handled else it
* returns IRQ_NONE.
**/
irqreturn_t
lpfc_fp_intr_handler(int irq, void *dev_id)
{
struct lpfc_hba *phba;
uint32_t ha_copy;
unsigned long status;
unsigned long iflag;
/* Get the driver's phba structure from the dev_id and
* assume the HBA is not interrupting.
*/
phba = (struct lpfc_hba *) dev_id;
if (unlikely(!phba))
return IRQ_NONE;
/*
* Stuff needs to be attented to when this function is invoked as an
* individual interrupt handler in MSI-X multi-message interrupt mode
*/
if (phba->intr_type == MSIX) {
/* If pci channel is offline, ignore all the interrupts */
if (unlikely(pci_channel_offline(phba->pcidev)))
return IRQ_NONE;
/* Update device-level interrupt statistics */
phba->sli.slistat.sli_intr++;
/* Ignore all interrupts during initialization. */
if (unlikely(phba->link_state < LPFC_LINK_DOWN))
return IRQ_NONE;
/* Need to read HA REG for FCP ring and other ring events */
ha_copy = readl(phba->HAregaddr);
/* Clear up only attention source related to fast-path */
spin_lock_irqsave(&phba->hbalock, iflag);
writel((ha_copy & (HA_R0_CLR_MSK | HA_R1_CLR_MSK)),
phba->HAregaddr);
readl(phba->HAregaddr); /* flush */
spin_unlock_irqrestore(&phba->hbalock, iflag);
} else
ha_copy = phba->ha_copy;
/*
* Process all events on FCP ring. Take the optimized path for FCP IO.
*/
ha_copy &= ~(phba->work_ha_mask);
status = (ha_copy & (HA_RXMASK << (4*LPFC_FCP_RING)));
status >>= (4*LPFC_FCP_RING);
if (status & HA_RXMASK)
lpfc_sli_handle_fast_ring_event(phba,
&phba->sli.ring[LPFC_FCP_RING],
status);
if (phba->cfg_multi_ring_support == 2) {
/*
* Process all events on extra ring. Take the optimized path
* for extra ring IO.
*/
status = (ha_copy & (HA_RXMASK << (4*LPFC_EXTRA_RING)));
status >>= (4*LPFC_EXTRA_RING);
if (status & HA_RXMASK) {
lpfc_sli_handle_fast_ring_event(phba,
&phba->sli.ring[LPFC_EXTRA_RING],
status);
}
}
return IRQ_HANDLED;
} /* lpfc_fp_intr_handler */
/**
* lpfc_intr_handler: The device-level interrupt handler of lpfc driver.
* @irq: Interrupt number.
* @dev_id: The device context pointer.
*
* This function is the device-level interrupt handler called from the PCI
* layer when either MSI or Pin-IRQ interrupt mode is enabled and there is
* an event in the HBA which requires driver attention. This function
* invokes the slow-path interrupt attention handling function and fast-path
* interrupt attention handling function in turn to process the relevant
* HBA attention events. This function is called without any lock held. It
* gets the hbalock to access and update SLI data structures.
*
* This function returns IRQ_HANDLED when interrupt is handled, else it
* returns IRQ_NONE.
**/
irqreturn_t
lpfc_intr_handler(int irq, void *dev_id)
{
struct lpfc_hba *phba;
irqreturn_t sp_irq_rc, fp_irq_rc;
unsigned long status1, status2;
/*
* Get the driver's phba structure from the dev_id and
* assume the HBA is not interrupting.
*/
phba = (struct lpfc_hba *) dev_id;
if (unlikely(!phba))
return IRQ_NONE;
/* If the pci channel is offline, ignore all the interrupts. */
if (unlikely(pci_channel_offline(phba->pcidev)))
return IRQ_NONE;
/* Update device level interrupt statistics */
phba->sli.slistat.sli_intr++;
/* Ignore all interrupts during initialization. */
if (unlikely(phba->link_state < LPFC_LINK_DOWN))
return IRQ_NONE;
spin_lock(&phba->hbalock);
phba->ha_copy = readl(phba->HAregaddr);
if (unlikely(!phba->ha_copy)) {
spin_unlock(&phba->hbalock);
return IRQ_NONE;
} else if (phba->ha_copy & HA_ERATT) {
if (phba->hba_flag & HBA_ERATT_HANDLED)
/* ERATT polling has handled ERATT */
phba->ha_copy &= ~HA_ERATT;
else
/* Indicate interrupt handler handles ERATT */
phba->hba_flag |= HBA_ERATT_HANDLED;
}
/* Clear attention sources except link and error attentions */
writel((phba->ha_copy & ~(HA_LATT | HA_ERATT)), phba->HAregaddr);
readl(phba->HAregaddr); /* flush */
spin_unlock(&phba->hbalock);
/*
* Invokes slow-path host attention interrupt handling as appropriate.
*/
/* status of events with mailbox and link attention */
status1 = phba->ha_copy & (HA_MBATT | HA_LATT | HA_ERATT);
/* status of events with ELS ring */
status2 = (phba->ha_copy & (HA_RXMASK << (4*LPFC_ELS_RING)));
status2 >>= (4*LPFC_ELS_RING);
if (status1 || (status2 & HA_RXMASK))
sp_irq_rc = lpfc_sp_intr_handler(irq, dev_id);
else
sp_irq_rc = IRQ_NONE;
/*
* Invoke fast-path host attention interrupt handling as appropriate.
*/
/* status of events with FCP ring */
status1 = (phba->ha_copy & (HA_RXMASK << (4*LPFC_FCP_RING)));
status1 >>= (4*LPFC_FCP_RING);
/* status of events with extra ring */
if (phba->cfg_multi_ring_support == 2) {
status2 = (phba->ha_copy & (HA_RXMASK << (4*LPFC_EXTRA_RING)));
status2 >>= (4*LPFC_EXTRA_RING);
} else
status2 = 0;
if ((status1 & HA_RXMASK) || (status2 & HA_RXMASK))
fp_irq_rc = lpfc_fp_intr_handler(irq, dev_id);
else
fp_irq_rc = IRQ_NONE;
/* Return device-level interrupt handling status */
return (sp_irq_rc == IRQ_HANDLED) ? sp_irq_rc : fp_irq_rc;
} /* lpfc_intr_handler */
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