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freebsd-src/sys/contrib/rdma/krping/krping.c
Justin Hibbits cfaab41c95 irdma: Convert to IfAPI 
Mostly mechanical changes, with some reworking in irdma_cm for iterating
over interfaces and addresses.  Further rework by Bartosz Sobczak.

Reviewed by:	bartosz.sobczak_intel.com
Tested by:	mateusz.moga_intel.com
Sponsored by:	Juniper Networks, Inc.
Differential Revision: https://reviews.freebsd.org/D38960
2023-04-25 14:25:31 -04:00

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/*
* Copyright (c) 2005 Ammasso, Inc. All rights reserved.
* Copyright (c) 2006-2009 Open Grid Computing, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/string.h>
#include <linux/list.h>
#include <linux/in.h>
#include <linux/device.h>
#include <linux/pci.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <asm/atomic.h>
#include <rdma/ib_verbs.h>
#include <rdma/rdma_cm.h>
#include "krping.h"
#include "getopt.h"
#define PFX "krping: "
extern int krping_debug;
#define DEBUG_LOG(...) do { if (krping_debug) log(LOG_INFO, __VA_ARGS__); } while (0)
#define BIND_INFO 1
MODULE_AUTHOR("Steve Wise");
MODULE_DESCRIPTION("RDMA ping server");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(krping, 1);
MODULE_DEPEND(krping, linuxkpi, 1, 1, 1);
static __inline uint64_t
get_cycles(void)
{
return (get_cyclecount());
}
typedef uint64_t cycles_t;
enum mem_type {
DMA = 1,
REG = 2,
};
static const struct krping_option krping_opts[] = {
{"count", OPT_INT, 'C'},
{"size", OPT_INT, 'S'},
{"addr", OPT_STRING, 'a'},
{"addr6", OPT_STRING, 'A'},
{"port", OPT_INT, 'p'},
{"verbose", OPT_NOPARAM, 'v'},
{"validate", OPT_NOPARAM, 'V'},
{"server", OPT_NOPARAM, 's'},
{"client", OPT_NOPARAM, 'c'},
{"server_inv", OPT_NOPARAM, 'I'},
{"wlat", OPT_NOPARAM, 'l'},
{"rlat", OPT_NOPARAM, 'L'},
{"bw", OPT_NOPARAM, 'B'},
{"duplex", OPT_NOPARAM, 'd'},
{"tos", OPT_INT, 't'},
{"txdepth", OPT_INT, 'T'},
{"poll", OPT_NOPARAM, 'P'},
{"local_dma_lkey", OPT_NOPARAM, 'Z'},
{"read_inv", OPT_NOPARAM, 'R'},
{"fr", OPT_NOPARAM, 'f'},
{NULL, 0, 0}
};
#define htonll(x) cpu_to_be64((x))
#define ntohll(x) cpu_to_be64((x))
static DEFINE_MUTEX(krping_mutex);
/*
* List of running krping threads.
*/
static LIST_HEAD(krping_cbs);
/*
* Invoke like this, one on each side, using the server's address on
* the RDMA device (iw%d):
*
* /bin/echo server,port=9999,addr=192.168.69.142,validate > /proc/krping
* /bin/echo client,port=9999,addr=192.168.69.142,validate > /proc/krping
* /bin/echo client,port=9999,addr6=2001:db8:0:f101::1,validate > /proc/krping
*
* krping "ping/pong" loop:
* client sends source rkey/addr/len
* server receives source rkey/add/len
* server rdma reads "ping" data from source
* server sends "go ahead" on rdma read completion
* client sends sink rkey/addr/len
* server receives sink rkey/addr/len
* server rdma writes "pong" data to sink
* server sends "go ahead" on rdma write completion
* <repeat loop>
*/
/*
* These states are used to signal events between the completion handler
* and the main client or server thread.
*
* Once CONNECTED, they cycle through RDMA_READ_ADV, RDMA_WRITE_ADV,
* and RDMA_WRITE_COMPLETE for each ping.
*/
enum test_state {
IDLE = 1,
CONNECT_REQUEST,
ADDR_RESOLVED,
ROUTE_RESOLVED,
CONNECTED,
RDMA_READ_ADV,
RDMA_READ_COMPLETE,
RDMA_WRITE_ADV,
RDMA_WRITE_COMPLETE,
ERROR
};
struct krping_rdma_info {
uint64_t buf;
uint32_t rkey;
uint32_t size;
};
/*
* Default max buffer size for IO...
*/
#define RPING_BUFSIZE 128*1024
#define RPING_SQ_DEPTH 64
/*
* Control block struct.
*/
struct krping_cb {
int server; /* 0 iff client */
struct ib_cq *cq;
struct ib_pd *pd;
struct ib_qp *qp;
struct ib_mr *dma_mr;
struct ib_fast_reg_page_list *page_list;
int page_list_len;
struct ib_reg_wr reg_mr_wr;
struct ib_send_wr invalidate_wr;
struct ib_mr *reg_mr;
int server_invalidate;
int read_inv;
u8 key;
struct ib_recv_wr rq_wr; /* recv work request record */
struct ib_sge recv_sgl; /* recv single SGE */
struct krping_rdma_info recv_buf __aligned(16); /* malloc'd buffer */
u64 recv_dma_addr;
DECLARE_PCI_UNMAP_ADDR(recv_mapping)
struct ib_send_wr sq_wr; /* send work requrest record */
struct ib_sge send_sgl;
struct krping_rdma_info send_buf __aligned(16); /* single send buf */
u64 send_dma_addr;
DECLARE_PCI_UNMAP_ADDR(send_mapping)
struct ib_rdma_wr rdma_sq_wr; /* rdma work request record */
struct ib_sge rdma_sgl; /* rdma single SGE */
char *rdma_buf; /* used as rdma sink */
u64 rdma_dma_addr;
DECLARE_PCI_UNMAP_ADDR(rdma_mapping)
struct ib_mr *rdma_mr;
uint32_t remote_rkey; /* remote guys RKEY */
uint64_t remote_addr; /* remote guys TO */
uint32_t remote_len; /* remote guys LEN */
char *start_buf; /* rdma read src */
u64 start_dma_addr;
DECLARE_PCI_UNMAP_ADDR(start_mapping)
struct ib_mr *start_mr;
enum test_state state; /* used for cond/signalling */
wait_queue_head_t sem;
struct krping_stats stats;
uint16_t port; /* dst port in NBO */
u8 addr[16] __aligned(8); /* dst addr in NBO */
char *addr_str; /* dst addr string */
uint8_t addr_type; /* ADDR_FAMILY - IPv4/V6 */
int verbose; /* verbose logging */
int count; /* ping count */
int size; /* ping data size */
int validate; /* validate ping data */
int wlat; /* run wlat test */
int rlat; /* run rlat test */
int bw; /* run bw test */
int duplex; /* run bw full duplex test */
int poll; /* poll or block for rlat test */
int txdepth; /* SQ depth */
int local_dma_lkey; /* use 0 for lkey */
int frtest; /* reg test */
int tos; /* type of service */
/* CM stuff */
struct rdma_cm_id *cm_id; /* connection on client side,*/
/* listener on server side. */
struct rdma_cm_id *child_cm_id; /* connection on server side */
struct list_head list;
};
static int krping_cma_event_handler(struct rdma_cm_id *cma_id,
struct rdma_cm_event *event)
{
int ret;
struct krping_cb *cb = cma_id->context;
DEBUG_LOG("cma_event type %d cma_id %p (%s)\n", event->event, cma_id,
(cma_id == cb->cm_id) ? "parent" : "child");
switch (event->event) {
case RDMA_CM_EVENT_ADDR_RESOLVED:
cb->state = ADDR_RESOLVED;
ret = rdma_resolve_route(cma_id, 2000);
if (ret) {
printk(KERN_ERR PFX "rdma_resolve_route error %d\n",
ret);
wake_up_interruptible(&cb->sem);
}
break;
case RDMA_CM_EVENT_ROUTE_RESOLVED:
cb->state = ROUTE_RESOLVED;
wake_up_interruptible(&cb->sem);
break;
case RDMA_CM_EVENT_CONNECT_REQUEST:
cb->state = CONNECT_REQUEST;
cb->child_cm_id = cma_id;
DEBUG_LOG("child cma %p\n", cb->child_cm_id);
wake_up_interruptible(&cb->sem);
break;
case RDMA_CM_EVENT_ESTABLISHED:
DEBUG_LOG("ESTABLISHED\n");
if (!cb->server) {
cb->state = CONNECTED;
}
wake_up_interruptible(&cb->sem);
break;
case RDMA_CM_EVENT_ADDR_ERROR:
case RDMA_CM_EVENT_ROUTE_ERROR:
case RDMA_CM_EVENT_CONNECT_ERROR:
case RDMA_CM_EVENT_UNREACHABLE:
case RDMA_CM_EVENT_REJECTED:
printk(KERN_ERR PFX "cma event %d, error %d\n", event->event,
event->status);
cb->state = ERROR;
wake_up_interruptible(&cb->sem);
break;
case RDMA_CM_EVENT_DISCONNECTED:
printk(KERN_ERR PFX "DISCONNECT EVENT...\n");
cb->state = ERROR;
wake_up_interruptible(&cb->sem);
break;
case RDMA_CM_EVENT_DEVICE_REMOVAL:
printk(KERN_ERR PFX "cma detected device removal!!!!\n");
cb->state = ERROR;
wake_up_interruptible(&cb->sem);
break;
default:
printk(KERN_ERR PFX "oof bad type!\n");
wake_up_interruptible(&cb->sem);
break;
}
return 0;
}
static int server_recv(struct krping_cb *cb, struct ib_wc *wc)
{
if (wc->byte_len != sizeof(cb->recv_buf)) {
printk(KERN_ERR PFX "Received bogus data, size %d\n",
wc->byte_len);
return -1;
}
cb->remote_rkey = ntohl(cb->recv_buf.rkey);
cb->remote_addr = ntohll(cb->recv_buf.buf);
cb->remote_len = ntohl(cb->recv_buf.size);
DEBUG_LOG("Received rkey %x addr %llx len %d from peer\n",
cb->remote_rkey, (unsigned long long)cb->remote_addr,
cb->remote_len);
if (cb->state <= CONNECTED || cb->state == RDMA_WRITE_COMPLETE)
cb->state = RDMA_READ_ADV;
else
cb->state = RDMA_WRITE_ADV;
return 0;
}
static int client_recv(struct krping_cb *cb, struct ib_wc *wc)
{
if (wc->byte_len != sizeof(cb->recv_buf)) {
printk(KERN_ERR PFX "Received bogus data, size %d\n",
wc->byte_len);
return -1;
}
if (cb->state == RDMA_READ_ADV)
cb->state = RDMA_WRITE_ADV;
else
cb->state = RDMA_WRITE_COMPLETE;
return 0;
}
static void krping_cq_event_handler(struct ib_cq *cq, void *ctx)
{
struct krping_cb *cb = ctx;
struct ib_wc wc;
const struct ib_recv_wr *bad_wr;
int ret;
BUG_ON(cb->cq != cq);
if (cb->frtest) {
printk(KERN_ERR PFX "cq completion event in frtest!\n");
return;
}
if (!cb->wlat && !cb->rlat && !cb->bw)
ib_req_notify_cq(cb->cq, IB_CQ_NEXT_COMP);
while ((ret = ib_poll_cq(cb->cq, 1, &wc)) == 1) {
if (wc.status) {
if (wc.status == IB_WC_WR_FLUSH_ERR) {
DEBUG_LOG("cq flushed\n");
continue;
} else {
printk(KERN_ERR PFX "cq completion failed with "
"wr_id %jx status %d opcode %d vender_err %x\n",
(uintmax_t)wc.wr_id, wc.status, wc.opcode, wc.vendor_err);
goto error;
}
}
if (cb->state == ERROR) {
printk(KERN_ERR PFX "cq completion in ERROR state\n");
return;
}
switch (wc.opcode) {
case IB_WC_SEND:
DEBUG_LOG("send completion\n");
cb->stats.send_bytes += cb->send_sgl.length;
cb->stats.send_msgs++;
break;
case IB_WC_RDMA_WRITE:
DEBUG_LOG("rdma write completion\n");
cb->stats.write_bytes += cb->rdma_sq_wr.wr.sg_list->length;
cb->stats.write_msgs++;
cb->state = RDMA_WRITE_COMPLETE;
wake_up_interruptible(&cb->sem);
break;
case IB_WC_RDMA_READ:
DEBUG_LOG("rdma read completion\n");
cb->stats.read_bytes += cb->rdma_sq_wr.wr.sg_list->length;
cb->stats.read_msgs++;
cb->state = RDMA_READ_COMPLETE;
wake_up_interruptible(&cb->sem);
break;
case IB_WC_RECV:
DEBUG_LOG("recv completion\n");
cb->stats.recv_bytes += sizeof(cb->recv_buf);
cb->stats.recv_msgs++;
if (cb->wlat || cb->rlat || cb->bw)
ret = server_recv(cb, &wc);
else
ret = cb->server ? server_recv(cb, &wc) :
client_recv(cb, &wc);
if (ret) {
printk(KERN_ERR PFX "recv wc error: %d\n", ret);
goto error;
}
ret = ib_post_recv(cb->qp, &cb->rq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post recv error: %d\n",
ret);
goto error;
}
wake_up_interruptible(&cb->sem);
break;
default:
printk(KERN_ERR PFX
"%s:%d Unexpected opcode %d, Shutting down\n",
__func__, __LINE__, wc.opcode);
goto error;
}
}
if (ret) {
printk(KERN_ERR PFX "poll error %d\n", ret);
goto error;
}
return;
error:
cb->state = ERROR;
wake_up_interruptible(&cb->sem);
}
static int krping_accept(struct krping_cb *cb)
{
struct rdma_conn_param conn_param;
int ret;
DEBUG_LOG("accepting client connection request\n");
memset(&conn_param, 0, sizeof conn_param);
conn_param.responder_resources = 1;
conn_param.initiator_depth = 1;
ret = rdma_accept(cb->child_cm_id, &conn_param);
if (ret) {
printk(KERN_ERR PFX "rdma_accept error: %d\n", ret);
return ret;
}
if (!cb->wlat && !cb->rlat && !cb->bw) {
wait_event_interruptible(cb->sem, cb->state >= CONNECTED);
if (cb->state == ERROR) {
printk(KERN_ERR PFX "wait for CONNECTED state %d\n",
cb->state);
return -1;
}
}
return 0;
}
static void krping_setup_wr(struct krping_cb *cb)
{
cb->recv_sgl.addr = cb->recv_dma_addr;
cb->recv_sgl.length = sizeof cb->recv_buf;
cb->recv_sgl.lkey = cb->pd->local_dma_lkey;
cb->rq_wr.sg_list = &cb->recv_sgl;
cb->rq_wr.num_sge = 1;
cb->send_sgl.addr = cb->send_dma_addr;
cb->send_sgl.length = sizeof cb->send_buf;
cb->send_sgl.lkey = cb->pd->local_dma_lkey;
cb->sq_wr.opcode = IB_WR_SEND;
cb->sq_wr.send_flags = IB_SEND_SIGNALED;
cb->sq_wr.sg_list = &cb->send_sgl;
cb->sq_wr.num_sge = 1;
if (cb->server || cb->wlat || cb->rlat || cb->bw) {
cb->rdma_sgl.addr = cb->rdma_dma_addr;
cb->rdma_sq_wr.wr.send_flags = IB_SEND_SIGNALED;
cb->rdma_sq_wr.wr.sg_list = &cb->rdma_sgl;
cb->rdma_sq_wr.wr.num_sge = 1;
}
/*
* A chain of 2 WRs, INVALDATE_MR + REG_MR.
* both unsignaled. The client uses them to reregister
* the rdma buffers with a new key each iteration.
*/
cb->reg_mr_wr.wr.opcode = IB_WR_REG_MR;
cb->reg_mr_wr.mr = cb->reg_mr;
cb->invalidate_wr.next = &cb->reg_mr_wr.wr;
cb->invalidate_wr.opcode = IB_WR_LOCAL_INV;
}
static int krping_setup_buffers(struct krping_cb *cb)
{
int ret;
DEBUG_LOG(PFX "krping_setup_buffers called on cb %p\n", cb);
cb->recv_dma_addr = ib_dma_map_single(cb->pd->device,
&cb->recv_buf,
sizeof(cb->recv_buf), DMA_BIDIRECTIONAL);
pci_unmap_addr_set(cb, recv_mapping, cb->recv_dma_addr);
cb->send_dma_addr = ib_dma_map_single(cb->pd->device,
&cb->send_buf, sizeof(cb->send_buf),
DMA_BIDIRECTIONAL);
pci_unmap_addr_set(cb, send_mapping, cb->send_dma_addr);
cb->rdma_buf = ib_dma_alloc_coherent(cb->pd->device, cb->size,
&cb->rdma_dma_addr,
GFP_KERNEL);
if (!cb->rdma_buf) {
DEBUG_LOG(PFX "rdma_buf allocation failed\n");
ret = -ENOMEM;
goto bail;
}
pci_unmap_addr_set(cb, rdma_mapping, cb->rdma_dma_addr);
cb->page_list_len = (((cb->size - 1) & PAGE_MASK) + PAGE_SIZE)
>> PAGE_SHIFT;
cb->reg_mr = ib_alloc_mr(cb->pd, IB_MR_TYPE_MEM_REG,
cb->page_list_len);
if (IS_ERR(cb->reg_mr)) {
ret = PTR_ERR(cb->reg_mr);
DEBUG_LOG(PFX "recv_buf reg_mr failed %d\n", ret);
goto bail;
}
DEBUG_LOG(PFX "reg rkey 0x%x page_list_len %u\n",
cb->reg_mr->rkey, cb->page_list_len);
if (!cb->server || cb->wlat || cb->rlat || cb->bw) {
cb->start_buf = ib_dma_alloc_coherent(cb->pd->device, cb->size,
&cb->start_dma_addr,
GFP_KERNEL);
if (!cb->start_buf) {
DEBUG_LOG(PFX "start_buf malloc failed\n");
ret = -ENOMEM;
goto bail;
}
pci_unmap_addr_set(cb, start_mapping, cb->start_dma_addr);
}
krping_setup_wr(cb);
DEBUG_LOG(PFX "allocated & registered buffers...\n");
return 0;
bail:
if (cb->reg_mr && !IS_ERR(cb->reg_mr))
ib_dereg_mr(cb->reg_mr);
if (cb->rdma_mr && !IS_ERR(cb->rdma_mr))
ib_dereg_mr(cb->rdma_mr);
if (cb->dma_mr && !IS_ERR(cb->dma_mr))
ib_dereg_mr(cb->dma_mr);
if (cb->rdma_buf) {
ib_dma_free_coherent(cb->pd->device, cb->size, cb->rdma_buf,
cb->rdma_dma_addr);
}
if (cb->start_buf) {
ib_dma_free_coherent(cb->pd->device, cb->size, cb->start_buf,
cb->start_dma_addr);
}
return ret;
}
static void krping_free_buffers(struct krping_cb *cb)
{
DEBUG_LOG("krping_free_buffers called on cb %p\n", cb);
if (cb->dma_mr)
ib_dereg_mr(cb->dma_mr);
if (cb->rdma_mr)
ib_dereg_mr(cb->rdma_mr);
if (cb->start_mr)
ib_dereg_mr(cb->start_mr);
if (cb->reg_mr)
ib_dereg_mr(cb->reg_mr);
dma_unmap_single(cb->pd->device->dma_device,
pci_unmap_addr(cb, recv_mapping),
sizeof(cb->recv_buf), DMA_BIDIRECTIONAL);
dma_unmap_single(cb->pd->device->dma_device,
pci_unmap_addr(cb, send_mapping),
sizeof(cb->send_buf), DMA_BIDIRECTIONAL);
ib_dma_free_coherent(cb->pd->device, cb->size, cb->rdma_buf,
cb->rdma_dma_addr);
if (cb->start_buf) {
ib_dma_free_coherent(cb->pd->device, cb->size, cb->start_buf,
cb->start_dma_addr);
}
}
static int krping_create_qp(struct krping_cb *cb)
{
struct ib_qp_init_attr init_attr;
int ret;
memset(&init_attr, 0, sizeof(init_attr));
init_attr.cap.max_send_wr = cb->txdepth;
init_attr.cap.max_recv_wr = 2;
/* For flush_qp() */
init_attr.cap.max_send_wr++;
init_attr.cap.max_recv_wr++;
init_attr.cap.max_recv_sge = 1;
init_attr.cap.max_send_sge = 1;
init_attr.qp_type = IB_QPT_RC;
init_attr.send_cq = cb->cq;
init_attr.recv_cq = cb->cq;
init_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
if (cb->server) {
ret = rdma_create_qp(cb->child_cm_id, cb->pd, &init_attr);
if (!ret)
cb->qp = cb->child_cm_id->qp;
} else {
ret = rdma_create_qp(cb->cm_id, cb->pd, &init_attr);
if (!ret)
cb->qp = cb->cm_id->qp;
}
return ret;
}
static void krping_free_qp(struct krping_cb *cb)
{
ib_destroy_qp(cb->qp);
ib_destroy_cq(cb->cq);
ib_dealloc_pd(cb->pd);
}
static int krping_setup_qp(struct krping_cb *cb, struct rdma_cm_id *cm_id)
{
int ret;
struct ib_cq_init_attr attr = {0};
cb->pd = ib_alloc_pd(cm_id->device, 0);
if (IS_ERR(cb->pd)) {
printk(KERN_ERR PFX "ib_alloc_pd failed\n");
return PTR_ERR(cb->pd);
}
DEBUG_LOG("created pd %p\n", cb->pd);
strlcpy(cb->stats.name, cb->pd->device->name, sizeof(cb->stats.name));
attr.cqe = cb->txdepth * 2;
attr.comp_vector = 0;
cb->cq = ib_create_cq(cm_id->device, krping_cq_event_handler, NULL,
cb, &attr);
if (IS_ERR(cb->cq)) {
printk(KERN_ERR PFX "ib_create_cq failed\n");
ret = PTR_ERR(cb->cq);
goto err1;
}
DEBUG_LOG("created cq %p\n", cb->cq);
if (!cb->wlat && !cb->rlat && !cb->bw && !cb->frtest) {
ret = ib_req_notify_cq(cb->cq, IB_CQ_NEXT_COMP);
if (ret) {
printk(KERN_ERR PFX "ib_create_cq failed\n");
goto err2;
}
}
ret = krping_create_qp(cb);
if (ret) {
printk(KERN_ERR PFX "krping_create_qp failed: %d\n", ret);
goto err2;
}
DEBUG_LOG("created qp %p\n", cb->qp);
return 0;
err2:
ib_destroy_cq(cb->cq);
err1:
ib_dealloc_pd(cb->pd);
return ret;
}
/*
* return the (possibly rebound) rkey for the rdma buffer.
* REG mode: invalidate and rebind via reg wr.
* other modes: just return the mr rkey.
*/
static u32 krping_rdma_rkey(struct krping_cb *cb, u64 buf, int post_inv)
{
u32 rkey;
const struct ib_send_wr *bad_wr;
int ret;
struct scatterlist sg = {0};
cb->invalidate_wr.ex.invalidate_rkey = cb->reg_mr->rkey;
/*
* Update the reg key.
*/
ib_update_fast_reg_key(cb->reg_mr, ++cb->key);
cb->reg_mr_wr.key = cb->reg_mr->rkey;
/*
* Update the reg WR with new buf info.
*/
if (buf == (u64)cb->start_dma_addr)
cb->reg_mr_wr.access = IB_ACCESS_REMOTE_READ;
else
cb->reg_mr_wr.access = IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE;
sg_dma_address(&sg) = buf;
sg_dma_len(&sg) = cb->size;
ret = ib_map_mr_sg(cb->reg_mr, &sg, 1, NULL, PAGE_SIZE);
BUG_ON(ret <= 0 || ret > cb->page_list_len);
DEBUG_LOG(PFX "post_inv = %d, reg_mr new rkey 0x%x pgsz %u len %u"
" iova_start %llx\n",
post_inv,
cb->reg_mr_wr.key,
cb->reg_mr->page_size,
(unsigned)cb->reg_mr->length,
(unsigned long long)cb->reg_mr->iova);
if (post_inv)
ret = ib_post_send(cb->qp, &cb->invalidate_wr, &bad_wr);
else
ret = ib_post_send(cb->qp, &cb->reg_mr_wr.wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
cb->state = ERROR;
}
rkey = cb->reg_mr->rkey;
return rkey;
}
static void krping_format_send(struct krping_cb *cb, u64 buf)
{
struct krping_rdma_info *info = &cb->send_buf;
u32 rkey;
/*
* Client side will do reg or mw bind before
* advertising the rdma buffer. Server side
* sends have no data.
*/
if (!cb->server || cb->wlat || cb->rlat || cb->bw) {
rkey = krping_rdma_rkey(cb, buf, !cb->server_invalidate);
info->buf = htonll(buf);
info->rkey = htonl(rkey);
info->size = htonl(cb->size);
DEBUG_LOG("RDMA addr %llx rkey %x len %d\n",
(unsigned long long)buf, rkey, cb->size);
}
}
static void krping_test_server(struct krping_cb *cb)
{
const struct ib_send_wr *bad_wr;
struct ib_send_wr inv;
int ret;
while (1) {
/* Wait for client's Start STAG/TO/Len */
wait_event_interruptible(cb->sem, cb->state >= RDMA_READ_ADV);
if (cb->state != RDMA_READ_ADV) {
printk(KERN_ERR PFX "wait for RDMA_READ_ADV state %d\n",
cb->state);
break;
}
DEBUG_LOG("server received sink adv\n");
cb->rdma_sq_wr.rkey = cb->remote_rkey;
cb->rdma_sq_wr.remote_addr = cb->remote_addr;
cb->rdma_sq_wr.wr.sg_list->length = cb->remote_len;
cb->rdma_sgl.lkey = krping_rdma_rkey(cb, cb->rdma_dma_addr, !cb->read_inv);
cb->rdma_sq_wr.wr.next = NULL;
/* Issue RDMA Read. */
if (cb->read_inv)
cb->rdma_sq_wr.wr.opcode = IB_WR_RDMA_READ_WITH_INV;
else {
cb->rdma_sq_wr.wr.opcode = IB_WR_RDMA_READ;
/*
* Immediately follow the read with a
* fenced LOCAL_INV.
*/
cb->rdma_sq_wr.wr.next = &inv;
memset(&inv, 0, sizeof inv);
inv.opcode = IB_WR_LOCAL_INV;
inv.ex.invalidate_rkey = cb->reg_mr->rkey;
inv.send_flags = IB_SEND_FENCE;
}
ret = ib_post_send(cb->qp, &cb->rdma_sq_wr.wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
break;
}
cb->rdma_sq_wr.wr.next = NULL;
DEBUG_LOG("server posted rdma read req \n");
/* Wait for read completion */
wait_event_interruptible(cb->sem,
cb->state >= RDMA_READ_COMPLETE);
if (cb->state != RDMA_READ_COMPLETE) {
printk(KERN_ERR PFX
"wait for RDMA_READ_COMPLETE state %d\n",
cb->state);
break;
}
DEBUG_LOG("server received read complete\n");
/* Display data in recv buf */
if (cb->verbose)
printk(KERN_INFO PFX "server ping data: %s\n",
cb->rdma_buf);
/* Tell client to continue */
if (cb->server && cb->server_invalidate) {
cb->sq_wr.ex.invalidate_rkey = cb->remote_rkey;
cb->sq_wr.opcode = IB_WR_SEND_WITH_INV;
DEBUG_LOG("send-w-inv rkey 0x%x\n", cb->remote_rkey);
}
ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
break;
}
DEBUG_LOG("server posted go ahead\n");
/* Wait for client's RDMA STAG/TO/Len */
wait_event_interruptible(cb->sem, cb->state >= RDMA_WRITE_ADV);
if (cb->state != RDMA_WRITE_ADV) {
printk(KERN_ERR PFX
"wait for RDMA_WRITE_ADV state %d\n",
cb->state);
break;
}
DEBUG_LOG("server received sink adv\n");
/* RDMA Write echo data */
cb->rdma_sq_wr.wr.opcode = IB_WR_RDMA_WRITE;
cb->rdma_sq_wr.rkey = cb->remote_rkey;
cb->rdma_sq_wr.remote_addr = cb->remote_addr;
cb->rdma_sq_wr.wr.sg_list->length = strlen(cb->rdma_buf) + 1;
if (cb->local_dma_lkey)
cb->rdma_sgl.lkey = cb->pd->local_dma_lkey;
else
cb->rdma_sgl.lkey = krping_rdma_rkey(cb, cb->rdma_dma_addr, 0);
DEBUG_LOG("rdma write from lkey %x laddr %llx len %d\n",
cb->rdma_sq_wr.wr.sg_list->lkey,
(unsigned long long)cb->rdma_sq_wr.wr.sg_list->addr,
cb->rdma_sq_wr.wr.sg_list->length);
ret = ib_post_send(cb->qp, &cb->rdma_sq_wr.wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
break;
}
/* Wait for completion */
ret = wait_event_interruptible(cb->sem, cb->state >=
RDMA_WRITE_COMPLETE);
if (cb->state != RDMA_WRITE_COMPLETE) {
printk(KERN_ERR PFX
"wait for RDMA_WRITE_COMPLETE state %d\n",
cb->state);
break;
}
DEBUG_LOG("server rdma write complete \n");
cb->state = CONNECTED;
/* Tell client to begin again */
if (cb->server && cb->server_invalidate) {
cb->sq_wr.ex.invalidate_rkey = cb->remote_rkey;
cb->sq_wr.opcode = IB_WR_SEND_WITH_INV;
DEBUG_LOG("send-w-inv rkey 0x%x\n", cb->remote_rkey);
}
ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
break;
}
DEBUG_LOG("server posted go ahead\n");
}
}
static void rlat_test(struct krping_cb *cb)
{
int scnt;
int iters = cb->count;
struct timeval start_tv, stop_tv;
int ret;
struct ib_wc wc;
const struct ib_send_wr *bad_wr;
int ne;
scnt = 0;
cb->rdma_sq_wr.wr.opcode = IB_WR_RDMA_READ;
cb->rdma_sq_wr.rkey = cb->remote_rkey;
cb->rdma_sq_wr.remote_addr = cb->remote_addr;
cb->rdma_sq_wr.wr.sg_list->length = cb->size;
microtime(&start_tv);
if (!cb->poll) {
cb->state = RDMA_READ_ADV;
ib_req_notify_cq(cb->cq, IB_CQ_NEXT_COMP);
}
while (scnt < iters) {
cb->state = RDMA_READ_ADV;
ret = ib_post_send(cb->qp, &cb->rdma_sq_wr.wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX
"Couldn't post send: ret=%d scnt %d\n",
ret, scnt);
return;
}
do {
if (!cb->poll) {
wait_event_interruptible(cb->sem,
cb->state != RDMA_READ_ADV);
if (cb->state == RDMA_READ_COMPLETE) {
ne = 1;
ib_req_notify_cq(cb->cq,
IB_CQ_NEXT_COMP);
} else {
ne = -1;
}
} else
ne = ib_poll_cq(cb->cq, 1, &wc);
if (cb->state == ERROR) {
printk(KERN_ERR PFX
"state == ERROR...bailing scnt %d\n",
scnt);
return;
}
} while (ne == 0);
if (ne < 0) {
printk(KERN_ERR PFX "poll CQ failed %d\n", ne);
return;
}
if (cb->poll && wc.status != IB_WC_SUCCESS) {
printk(KERN_ERR PFX "Completion wth error at %s:\n",
cb->server ? "server" : "client");
printk(KERN_ERR PFX "Failed status %d: wr_id %d\n",
wc.status, (int) wc.wr_id);
return;
}
++scnt;
}
microtime(&stop_tv);
if (stop_tv.tv_usec < start_tv.tv_usec) {
stop_tv.tv_usec += 1000000;
stop_tv.tv_sec -= 1;
}
printk(KERN_ERR PFX "delta sec %lu delta usec %lu iter %d size %d\n",
(unsigned long)(stop_tv.tv_sec - start_tv.tv_sec),
(unsigned long)(stop_tv.tv_usec - start_tv.tv_usec),
scnt, cb->size);
}
static void wlat_test(struct krping_cb *cb)
{
int ccnt, scnt, rcnt;
int iters=cb->count;
volatile char *poll_buf = (char *) cb->start_buf;
char *buf = (char *)cb->rdma_buf;
struct timeval start_tv, stop_tv;
cycles_t *post_cycles_start = NULL;
cycles_t *post_cycles_stop = NULL;
cycles_t *poll_cycles_start = NULL;
cycles_t *poll_cycles_stop = NULL;
cycles_t *last_poll_cycles_start = NULL;
cycles_t sum_poll = 0, sum_post = 0, sum_last_poll = 0;
int i;
int cycle_iters = 1000;
ccnt = 0;
scnt = 0;
rcnt = 0;
post_cycles_start = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL);
if (!post_cycles_start) {
printk(KERN_ERR PFX "%s kmalloc failed\n", __FUNCTION__);
goto done;
}
post_cycles_stop = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL);
if (!post_cycles_stop) {
printk(KERN_ERR PFX "%s kmalloc failed\n", __FUNCTION__);
goto done;
}
poll_cycles_start = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL);
if (!poll_cycles_start) {
printk(KERN_ERR PFX "%s kmalloc failed\n", __FUNCTION__);
goto done;
}
poll_cycles_stop = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL);
if (!poll_cycles_stop) {
printk(KERN_ERR PFX "%s kmalloc failed\n", __FUNCTION__);
goto done;
}
last_poll_cycles_start = kmalloc(cycle_iters * sizeof(cycles_t),
GFP_KERNEL);
if (!last_poll_cycles_start) {
printk(KERN_ERR PFX "%s kmalloc failed\n", __FUNCTION__);
goto done;
}
cb->rdma_sq_wr.wr.opcode = IB_WR_RDMA_WRITE;
cb->rdma_sq_wr.rkey = cb->remote_rkey;
cb->rdma_sq_wr.remote_addr = cb->remote_addr;
cb->rdma_sq_wr.wr.sg_list->length = cb->size;
if (cycle_iters > iters)
cycle_iters = iters;
microtime(&start_tv);
while (scnt < iters || ccnt < iters || rcnt < iters) {
/* Wait till buffer changes. */
if (rcnt < iters && !(scnt < 1 && !cb->server)) {
++rcnt;
while (*poll_buf != (char)rcnt) {
if (cb->state == ERROR) {
printk(KERN_ERR PFX
"state = ERROR, bailing\n");
goto done;
}
}
}
if (scnt < iters) {
const struct ib_send_wr *bad_wr;
*buf = (char)scnt+1;
if (scnt < cycle_iters)
post_cycles_start[scnt] = get_cycles();
if (ib_post_send(cb->qp, &cb->rdma_sq_wr.wr, &bad_wr)) {
printk(KERN_ERR PFX
"Couldn't post send: scnt=%d\n",
scnt);
goto done;
}
if (scnt < cycle_iters)
post_cycles_stop[scnt] = get_cycles();
scnt++;
}
if (ccnt < iters) {
struct ib_wc wc;
int ne;
if (ccnt < cycle_iters)
poll_cycles_start[ccnt] = get_cycles();
do {
if (ccnt < cycle_iters)
last_poll_cycles_start[ccnt] =
get_cycles();
ne = ib_poll_cq(cb->cq, 1, &wc);
} while (ne == 0);
if (ccnt < cycle_iters)
poll_cycles_stop[ccnt] = get_cycles();
++ccnt;
if (ne < 0) {
printk(KERN_ERR PFX "poll CQ failed %d\n", ne);
goto done;
}
if (wc.status != IB_WC_SUCCESS) {
printk(KERN_ERR PFX
"Completion wth error at %s:\n",
cb->server ? "server" : "client");
printk(KERN_ERR PFX
"Failed status %d: wr_id %d\n",
wc.status, (int) wc.wr_id);
printk(KERN_ERR PFX
"scnt=%d, rcnt=%d, ccnt=%d\n",
scnt, rcnt, ccnt);
goto done;
}
}
}
microtime(&stop_tv);
if (stop_tv.tv_usec < start_tv.tv_usec) {
stop_tv.tv_usec += 1000000;
stop_tv.tv_sec -= 1;
}
for (i=0; i < cycle_iters; i++) {
sum_post += post_cycles_stop[i] - post_cycles_start[i];
sum_poll += poll_cycles_stop[i] - poll_cycles_start[i];
sum_last_poll += poll_cycles_stop[i]-last_poll_cycles_start[i];
}
printk(KERN_ERR PFX
"delta sec %lu delta usec %lu iter %d size %d cycle_iters %d"
" sum_post %llu sum_poll %llu sum_last_poll %llu\n",
(unsigned long)(stop_tv.tv_sec - start_tv.tv_sec),
(unsigned long)(stop_tv.tv_usec - start_tv.tv_usec),
scnt, cb->size, cycle_iters,
(unsigned long long)sum_post, (unsigned long long)sum_poll,
(unsigned long long)sum_last_poll);
done:
kfree(post_cycles_start);
kfree(post_cycles_stop);
kfree(poll_cycles_start);
kfree(poll_cycles_stop);
kfree(last_poll_cycles_start);
}
static void bw_test(struct krping_cb *cb)
{
int ccnt, scnt;
int iters=cb->count;
struct timeval start_tv, stop_tv;
cycles_t *post_cycles_start = NULL;
cycles_t *post_cycles_stop = NULL;
cycles_t *poll_cycles_start = NULL;
cycles_t *poll_cycles_stop = NULL;
cycles_t *last_poll_cycles_start = NULL;
cycles_t sum_poll = 0, sum_post = 0, sum_last_poll = 0;
int i;
int cycle_iters = 1000;
ccnt = 0;
scnt = 0;
post_cycles_start = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL);
if (!post_cycles_start) {
printk(KERN_ERR PFX "%s kmalloc failed\n", __FUNCTION__);
goto done;
}
post_cycles_stop = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL);
if (!post_cycles_stop) {
printk(KERN_ERR PFX "%s kmalloc failed\n", __FUNCTION__);
goto done;
}
poll_cycles_start = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL);
if (!poll_cycles_start) {
printk(KERN_ERR PFX "%s kmalloc failed\n", __FUNCTION__);
goto done;
}
poll_cycles_stop = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL);
if (!poll_cycles_stop) {
printk(KERN_ERR PFX "%s kmalloc failed\n", __FUNCTION__);
goto done;
}
last_poll_cycles_start = kmalloc(cycle_iters * sizeof(cycles_t),
GFP_KERNEL);
if (!last_poll_cycles_start) {
printk(KERN_ERR PFX "%s kmalloc failed\n", __FUNCTION__);
goto done;
}
cb->rdma_sq_wr.wr.opcode = IB_WR_RDMA_WRITE;
cb->rdma_sq_wr.rkey = cb->remote_rkey;
cb->rdma_sq_wr.remote_addr = cb->remote_addr;
cb->rdma_sq_wr.wr.sg_list->length = cb->size;
if (cycle_iters > iters)
cycle_iters = iters;
microtime(&start_tv);
while (scnt < iters || ccnt < iters) {
while (scnt < iters && scnt - ccnt < cb->txdepth) {
const struct ib_send_wr *bad_wr;
if (scnt < cycle_iters)
post_cycles_start[scnt] = get_cycles();
if (ib_post_send(cb->qp, &cb->rdma_sq_wr.wr, &bad_wr)) {
printk(KERN_ERR PFX
"Couldn't post send: scnt=%d\n",
scnt);
goto done;
}
if (scnt < cycle_iters)
post_cycles_stop[scnt] = get_cycles();
++scnt;
}
if (ccnt < iters) {
int ne;
struct ib_wc wc;
if (ccnt < cycle_iters)
poll_cycles_start[ccnt] = get_cycles();
do {
if (ccnt < cycle_iters)
last_poll_cycles_start[ccnt] =
get_cycles();
ne = ib_poll_cq(cb->cq, 1, &wc);
} while (ne == 0);
if (ccnt < cycle_iters)
poll_cycles_stop[ccnt] = get_cycles();
ccnt += 1;
if (ne < 0) {
printk(KERN_ERR PFX "poll CQ failed %d\n", ne);
goto done;
}
if (wc.status != IB_WC_SUCCESS) {
printk(KERN_ERR PFX
"Completion wth error at %s:\n",
cb->server ? "server" : "client");
printk(KERN_ERR PFX
"Failed status %d: wr_id %d\n",
wc.status, (int) wc.wr_id);
goto done;
}
}
}
microtime(&stop_tv);
if (stop_tv.tv_usec < start_tv.tv_usec) {
stop_tv.tv_usec += 1000000;
stop_tv.tv_sec -= 1;
}
for (i=0; i < cycle_iters; i++) {
sum_post += post_cycles_stop[i] - post_cycles_start[i];
sum_poll += poll_cycles_stop[i] - poll_cycles_start[i];
sum_last_poll += poll_cycles_stop[i]-last_poll_cycles_start[i];
}
printk(KERN_ERR PFX
"delta sec %lu delta usec %lu iter %d size %d cycle_iters %d"
" sum_post %llu sum_poll %llu sum_last_poll %llu\n",
(unsigned long)(stop_tv.tv_sec - start_tv.tv_sec),
(unsigned long)(stop_tv.tv_usec - start_tv.tv_usec),
scnt, cb->size, cycle_iters,
(unsigned long long)sum_post, (unsigned long long)sum_poll,
(unsigned long long)sum_last_poll);
done:
kfree(post_cycles_start);
kfree(post_cycles_stop);
kfree(poll_cycles_start);
kfree(poll_cycles_stop);
kfree(last_poll_cycles_start);
}
static void krping_rlat_test_server(struct krping_cb *cb)
{
const struct ib_send_wr *bad_wr;
struct ib_wc wc;
int ret;
/* Spin waiting for client's Start STAG/TO/Len */
while (cb->state < RDMA_READ_ADV) {
krping_cq_event_handler(cb->cq, cb);
}
/* Send STAG/TO/Len to client */
krping_format_send(cb, cb->start_dma_addr);
ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
return;
}
/* Spin waiting for send completion */
while ((ret = ib_poll_cq(cb->cq, 1, &wc) == 0));
if (ret < 0) {
printk(KERN_ERR PFX "poll error %d\n", ret);
return;
}
if (wc.status) {
printk(KERN_ERR PFX "send completiong error %d\n", wc.status);
return;
}
wait_event_interruptible(cb->sem, cb->state == ERROR);
}
static void krping_wlat_test_server(struct krping_cb *cb)
{
const struct ib_send_wr *bad_wr;
struct ib_wc wc;
int ret;
/* Spin waiting for client's Start STAG/TO/Len */
while (cb->state < RDMA_READ_ADV) {
krping_cq_event_handler(cb->cq, cb);
}
/* Send STAG/TO/Len to client */
krping_format_send(cb, cb->start_dma_addr);
ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
return;
}
/* Spin waiting for send completion */
while ((ret = ib_poll_cq(cb->cq, 1, &wc) == 0));
if (ret < 0) {
printk(KERN_ERR PFX "poll error %d\n", ret);
return;
}
if (wc.status) {
printk(KERN_ERR PFX "send completiong error %d\n", wc.status);
return;
}
wlat_test(cb);
wait_event_interruptible(cb->sem, cb->state == ERROR);
}
static void krping_bw_test_server(struct krping_cb *cb)
{
const struct ib_send_wr *bad_wr;
struct ib_wc wc;
int ret;
/* Spin waiting for client's Start STAG/TO/Len */
while (cb->state < RDMA_READ_ADV) {
krping_cq_event_handler(cb->cq, cb);
}
/* Send STAG/TO/Len to client */
krping_format_send(cb, cb->start_dma_addr);
ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
return;
}
/* Spin waiting for send completion */
while ((ret = ib_poll_cq(cb->cq, 1, &wc) == 0));
if (ret < 0) {
printk(KERN_ERR PFX "poll error %d\n", ret);
return;
}
if (wc.status) {
printk(KERN_ERR PFX "send completiong error %d\n", wc.status);
return;
}
if (cb->duplex)
bw_test(cb);
wait_event_interruptible(cb->sem, cb->state == ERROR);
}
static int reg_supported(struct ib_device *dev)
{
u64 needed_flags = IB_DEVICE_MEM_MGT_EXTENSIONS;
if ((dev->attrs.device_cap_flags & needed_flags) != needed_flags) {
printk(KERN_ERR PFX
"Fastreg not supported - device_cap_flags 0x%llx\n",
(unsigned long long)dev->attrs.device_cap_flags);
return 0;
}
DEBUG_LOG("Fastreg supported - device_cap_flags 0x%llx\n",
(unsigned long long)dev->attrs.device_cap_flags);
return 1;
}
static void fill_sockaddr(struct sockaddr_storage *sin, struct krping_cb *cb)
{
memset(sin, 0, sizeof(*sin));
if (cb->addr_type == AF_INET) {
struct sockaddr_in *sin4 = (struct sockaddr_in *)sin;
sin4->sin_len = sizeof(*sin4);
sin4->sin_family = AF_INET;
memcpy((void *)&sin4->sin_addr.s_addr, cb->addr, 4);
sin4->sin_port = cb->port;
} else if (cb->addr_type == AF_INET6) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sin;
sin6->sin6_len = sizeof(*sin6);
sin6->sin6_family = AF_INET6;
memcpy((void *)&sin6->sin6_addr, cb->addr, 16);
sin6->sin6_port = cb->port;
}
}
static int krping_bind_server(struct krping_cb *cb)
{
struct sockaddr_storage sin;
int ret;
fill_sockaddr(&sin, cb);
ret = rdma_bind_addr(cb->cm_id, (struct sockaddr *)&sin);
if (ret) {
printk(KERN_ERR PFX "rdma_bind_addr error %d\n", ret);
return ret;
}
DEBUG_LOG("rdma_bind_addr successful\n");
DEBUG_LOG("rdma_listen\n");
ret = rdma_listen(cb->cm_id, 3);
if (ret) {
printk(KERN_ERR PFX "rdma_listen failed: %d\n", ret);
return ret;
}
wait_event_interruptible(cb->sem, cb->state >= CONNECT_REQUEST);
if (cb->state != CONNECT_REQUEST) {
printk(KERN_ERR PFX "wait for CONNECT_REQUEST state %d\n",
cb->state);
return -1;
}
if (!reg_supported(cb->child_cm_id->device))
return -EINVAL;
return 0;
}
static void krping_run_server(struct krping_cb *cb)
{
const struct ib_recv_wr *bad_wr;
int ret;
ret = krping_bind_server(cb);
if (ret)
return;
ret = krping_setup_qp(cb, cb->child_cm_id);
if (ret) {
printk(KERN_ERR PFX "setup_qp failed: %d\n", ret);
goto err0;
}
ret = krping_setup_buffers(cb);
if (ret) {
printk(KERN_ERR PFX "krping_setup_buffers failed: %d\n", ret);
goto err1;
}
ret = ib_post_recv(cb->qp, &cb->rq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret);
goto err2;
}
ret = krping_accept(cb);
if (ret) {
printk(KERN_ERR PFX "connect error %d\n", ret);
goto err2;
}
if (cb->wlat)
krping_wlat_test_server(cb);
else if (cb->rlat)
krping_rlat_test_server(cb);
else if (cb->bw)
krping_bw_test_server(cb);
else
krping_test_server(cb);
rdma_disconnect(cb->child_cm_id);
err2:
krping_free_buffers(cb);
err1:
krping_free_qp(cb);
err0:
rdma_destroy_id(cb->child_cm_id);
}
static void krping_test_client(struct krping_cb *cb)
{
int ping, start, cc, i, ret;
const struct ib_send_wr *bad_wr;
unsigned char c;
start = 65;
for (ping = 0; !cb->count || ping < cb->count; ping++) {
cb->state = RDMA_READ_ADV;
/* Put some ascii text in the buffer. */
cc = sprintf(cb->start_buf, "rdma-ping-%d: ", ping);
for (i = cc, c = start; i < cb->size; i++) {
cb->start_buf[i] = c;
c++;
if (c > 122)
c = 65;
}
start++;
if (start > 122)
start = 65;
cb->start_buf[cb->size - 1] = 0;
krping_format_send(cb, cb->start_dma_addr);
if (cb->state == ERROR) {
printk(KERN_ERR PFX "krping_format_send failed\n");
break;
}
ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
break;
}
/* Wait for server to ACK */
wait_event_interruptible(cb->sem, cb->state >= RDMA_WRITE_ADV);
if (cb->state != RDMA_WRITE_ADV) {
printk(KERN_ERR PFX
"wait for RDMA_WRITE_ADV state %d\n",
cb->state);
break;
}
krping_format_send(cb, cb->rdma_dma_addr);
ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
break;
}
/* Wait for the server to say the RDMA Write is complete. */
wait_event_interruptible(cb->sem,
cb->state >= RDMA_WRITE_COMPLETE);
if (cb->state != RDMA_WRITE_COMPLETE) {
printk(KERN_ERR PFX
"wait for RDMA_WRITE_COMPLETE state %d\n",
cb->state);
break;
}
if (cb->validate)
if (memcmp(cb->start_buf, cb->rdma_buf, cb->size)) {
printk(KERN_ERR PFX "data mismatch!\n");
break;
}
if (cb->verbose)
printk(KERN_INFO PFX "ping data: %s\n", cb->rdma_buf);
#ifdef SLOW_KRPING
wait_event_interruptible_timeout(cb->sem, cb->state == ERROR, HZ);
#endif
}
}
static void krping_rlat_test_client(struct krping_cb *cb)
{
const struct ib_send_wr *bad_wr;
struct ib_wc wc;
int ret;
cb->state = RDMA_READ_ADV;
/* Send STAG/TO/Len to client */
krping_format_send(cb, cb->start_dma_addr);
if (cb->state == ERROR) {
printk(KERN_ERR PFX "krping_format_send failed\n");
return;
}
ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
return;
}
/* Spin waiting for send completion */
while ((ret = ib_poll_cq(cb->cq, 1, &wc) == 0));
if (ret < 0) {
printk(KERN_ERR PFX "poll error %d\n", ret);
return;
}
if (wc.status) {
printk(KERN_ERR PFX "send completion error %d\n", wc.status);
return;
}
/* Spin waiting for server's Start STAG/TO/Len */
while (cb->state < RDMA_WRITE_ADV) {
krping_cq_event_handler(cb->cq, cb);
}
#if 0
{
int i;
struct timeval start, stop;
time_t sec;
suseconds_t usec;
unsigned long long elapsed;
struct ib_wc wc;
const struct ib_send_wr *bad_wr;
int ne;
cb->rdma_sq_wr.wr.opcode = IB_WR_RDMA_WRITE;
cb->rdma_sq_wr.rkey = cb->remote_rkey;
cb->rdma_sq_wr.remote_addr = cb->remote_addr;
cb->rdma_sq_wr.wr.sg_list->length = 0;
cb->rdma_sq_wr.wr.num_sge = 0;
microtime(&start);
for (i=0; i < 100000; i++) {
if (ib_post_send(cb->qp, &cb->rdma_sq_wr.wr, &bad_wr)) {
printk(KERN_ERR PFX "Couldn't post send\n");
return;
}
do {
ne = ib_poll_cq(cb->cq, 1, &wc);
} while (ne == 0);
if (ne < 0) {
printk(KERN_ERR PFX "poll CQ failed %d\n", ne);
return;
}
if (wc.status != IB_WC_SUCCESS) {
printk(KERN_ERR PFX "Completion wth error at %s:\n",
cb->server ? "server" : "client");
printk(KERN_ERR PFX "Failed status %d: wr_id %d\n",
wc.status, (int) wc.wr_id);
return;
}
}
microtime(&stop);
if (stop.tv_usec < start.tv_usec) {
stop.tv_usec += 1000000;
stop.tv_sec -= 1;
}
sec = stop.tv_sec - start.tv_sec;
usec = stop.tv_usec - start.tv_usec;
elapsed = sec * 1000000 + usec;
printk(KERN_ERR PFX "0B-write-lat iters 100000 usec %llu\n", elapsed);
}
#endif
rlat_test(cb);
}
static void krping_wlat_test_client(struct krping_cb *cb)
{
const struct ib_send_wr *bad_wr;
struct ib_wc wc;
int ret;
cb->state = RDMA_READ_ADV;
/* Send STAG/TO/Len to client */
krping_format_send(cb, cb->start_dma_addr);
if (cb->state == ERROR) {
printk(KERN_ERR PFX "krping_format_send failed\n");
return;
}
ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
return;
}
/* Spin waiting for send completion */
while ((ret = ib_poll_cq(cb->cq, 1, &wc) == 0));
if (ret < 0) {
printk(KERN_ERR PFX "poll error %d\n", ret);
return;
}
if (wc.status) {
printk(KERN_ERR PFX "send completion error %d\n", wc.status);
return;
}
/* Spin waiting for server's Start STAG/TO/Len */
while (cb->state < RDMA_WRITE_ADV) {
krping_cq_event_handler(cb->cq, cb);
}
wlat_test(cb);
}
static void krping_bw_test_client(struct krping_cb *cb)
{
const struct ib_send_wr *bad_wr;
struct ib_wc wc;
int ret;
cb->state = RDMA_READ_ADV;
/* Send STAG/TO/Len to client */
krping_format_send(cb, cb->start_dma_addr);
if (cb->state == ERROR) {
printk(KERN_ERR PFX "krping_format_send failed\n");
return;
}
ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "post send error %d\n", ret);
return;
}
/* Spin waiting for send completion */
while ((ret = ib_poll_cq(cb->cq, 1, &wc) == 0));
if (ret < 0) {
printk(KERN_ERR PFX "poll error %d\n", ret);
return;
}
if (wc.status) {
printk(KERN_ERR PFX "send completion error %d\n", wc.status);
return;
}
/* Spin waiting for server's Start STAG/TO/Len */
while (cb->state < RDMA_WRITE_ADV) {
krping_cq_event_handler(cb->cq, cb);
}
bw_test(cb);
}
/*
* Manual qp flush test
*/
static void flush_qp(struct krping_cb *cb)
{
struct ib_send_wr wr = { 0 };
const struct ib_send_wr *bad;
struct ib_recv_wr recv_wr = { 0 };
const struct ib_recv_wr *recv_bad;
struct ib_wc wc;
int ret;
int flushed = 0;
int ccnt = 0;
rdma_disconnect(cb->cm_id);
DEBUG_LOG("disconnected!\n");
wr.opcode = IB_WR_SEND;
wr.wr_id = 0xdeadbeefcafebabe;
ret = ib_post_send(cb->qp, &wr, &bad);
if (ret) {
printk(KERN_ERR PFX "%s post_send failed ret %d\n", __func__, ret);
return;
}
recv_wr.wr_id = 0xcafebabedeadbeef;
ret = ib_post_recv(cb->qp, &recv_wr, &recv_bad);
if (ret) {
printk(KERN_ERR PFX "%s post_recv failed ret %d\n", __func__, ret);
return;
}
/* poll until the flush WRs complete */
do {
ret = ib_poll_cq(cb->cq, 1, &wc);
if (ret < 0) {
printk(KERN_ERR PFX "ib_poll_cq failed %d\n", ret);
return;
}
if (ret == 0)
continue;
ccnt++;
if (wc.wr_id == 0xdeadbeefcafebabe ||
wc.wr_id == 0xcafebabedeadbeef)
flushed++;
} while (flushed != 2);
DEBUG_LOG("qp_flushed! ccnt %u\n", ccnt);
}
static void krping_fr_test(struct krping_cb *cb)
{
struct ib_send_wr inv;
const struct ib_send_wr *bad;
struct ib_reg_wr fr;
struct ib_wc wc;
u8 key = 0;
struct ib_mr *mr;
int ret;
int size = cb->size;
int plen = (((size - 1) & PAGE_MASK) + PAGE_SIZE) >> PAGE_SHIFT;
unsigned long start;
int count = 0;
int scnt = 0;
struct scatterlist sg = {0};
mr = ib_alloc_mr(cb->pd, IB_MR_TYPE_MEM_REG, plen);
if (IS_ERR(mr)) {
printk(KERN_ERR PFX "ib_alloc_mr failed %ld\n", PTR_ERR(mr));
return;
}
sg_dma_address(&sg) = (dma_addr_t)0xcafebabe0000ULL;
sg_dma_len(&sg) = size;
ret = ib_map_mr_sg(mr, &sg, 1, NULL, PAGE_SIZE);
if (ret <= 0) {
printk(KERN_ERR PFX "ib_map_mr_sge err %d\n", ret);
goto err2;
}
memset(&fr, 0, sizeof fr);
fr.wr.opcode = IB_WR_REG_MR;
fr.access = IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE;
fr.mr = mr;
fr.wr.next = &inv;
memset(&inv, 0, sizeof inv);
inv.opcode = IB_WR_LOCAL_INV;
inv.send_flags = IB_SEND_SIGNALED;
DEBUG_LOG("fr_test: stag index 0x%x plen %u size %u depth %u\n", mr->rkey >> 8, plen, cb->size, cb->txdepth);
start = time_uptime;
while (!cb->count || count <= cb->count) {
if (SIGPENDING(curthread)) {
printk(KERN_ERR PFX "signal!\n");
break;
}
if ((time_uptime - start) >= 9) {
DEBUG_LOG("fr_test: pausing 1 second! count %u latest size %u plen %u\n", count, size, plen);
wait_event_interruptible_timeout(cb->sem, cb->state == ERROR, HZ);
if (cb->state == ERROR)
break;
start = time_uptime;
}
while (scnt < (cb->txdepth>>1)) {
ib_update_fast_reg_key(mr, ++key);
fr.key = mr->rkey;
inv.ex.invalidate_rkey = mr->rkey;
size = arc4random() % cb->size;
if (size == 0)
size = cb->size;
sg_dma_len(&sg) = size;
ret = ib_map_mr_sg(mr, &sg, 1, NULL, PAGE_SIZE);
if (ret <= 0) {
printk(KERN_ERR PFX "ib_map_mr_sge err %d\n", ret);
goto err2;
}
ret = ib_post_send(cb->qp, &fr.wr, &bad);
if (ret) {
printk(KERN_ERR PFX "ib_post_send failed %d\n", ret);
goto err2;
}
scnt++;
}
ret = ib_poll_cq(cb->cq, 1, &wc);
if (ret < 0) {
printk(KERN_ERR PFX "ib_poll_cq failed %d\n", ret);
goto err2;
}
if (ret == 1) {
if (wc.status) {
printk(KERN_ERR PFX "completion error %u\n", wc.status);
goto err2;
}
count++;
scnt--;
}
}
err2:
flush_qp(cb);
DEBUG_LOG("fr_test: done!\n");
ib_dereg_mr(mr);
}
static int krping_connect_client(struct krping_cb *cb)
{
struct rdma_conn_param conn_param;
int ret;
memset(&conn_param, 0, sizeof conn_param);
conn_param.responder_resources = 1;
conn_param.initiator_depth = 1;
conn_param.retry_count = 10;
ret = rdma_connect(cb->cm_id, &conn_param);
if (ret) {
printk(KERN_ERR PFX "rdma_connect error %d\n", ret);
return ret;
}
wait_event_interruptible(cb->sem, cb->state >= CONNECTED);
if (cb->state == ERROR) {
printk(KERN_ERR PFX "wait for CONNECTED state %d\n", cb->state);
return -1;
}
DEBUG_LOG("rdma_connect successful\n");
return 0;
}
static int krping_bind_client(struct krping_cb *cb)
{
struct sockaddr_storage sin;
int ret;
fill_sockaddr(&sin, cb);
ret = rdma_resolve_addr(cb->cm_id, NULL, (struct sockaddr *)&sin, 2000);
if (ret) {
printk(KERN_ERR PFX "rdma_resolve_addr error %d\n", ret);
return ret;
}
wait_event_interruptible(cb->sem, cb->state >= ROUTE_RESOLVED);
if (cb->state != ROUTE_RESOLVED) {
printk(KERN_ERR PFX
"addr/route resolution did not resolve: state %d\n",
cb->state);
return -EINTR;
}
if (!reg_supported(cb->cm_id->device))
return -EINVAL;
DEBUG_LOG("rdma_resolve_addr - rdma_resolve_route successful\n");
return 0;
}
static void krping_run_client(struct krping_cb *cb)
{
const struct ib_recv_wr *bad_wr;
int ret;
/* set type of service, if any */
if (cb->tos != 0)
rdma_set_service_type(cb->cm_id, cb->tos);
ret = krping_bind_client(cb);
if (ret)
return;
ret = krping_setup_qp(cb, cb->cm_id);
if (ret) {
printk(KERN_ERR PFX "setup_qp failed: %d\n", ret);
return;
}
ret = krping_setup_buffers(cb);
if (ret) {
printk(KERN_ERR PFX "krping_setup_buffers failed: %d\n", ret);
goto err1;
}
ret = ib_post_recv(cb->qp, &cb->rq_wr, &bad_wr);
if (ret) {
printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret);
goto err2;
}
ret = krping_connect_client(cb);
if (ret) {
printk(KERN_ERR PFX "connect error %d\n", ret);
goto err2;
}
if (cb->wlat)
krping_wlat_test_client(cb);
else if (cb->rlat)
krping_rlat_test_client(cb);
else if (cb->bw)
krping_bw_test_client(cb);
else if (cb->frtest)
krping_fr_test(cb);
else
krping_test_client(cb);
rdma_disconnect(cb->cm_id);
err2:
krping_free_buffers(cb);
err1:
krping_free_qp(cb);
}
static uint16_t
krping_get_ipv6_scope_id(char *name)
{
struct ifnet *ifp;
uint16_t retval;
if (name == NULL)
return (0);
CURVNET_SET_QUIET(TD_TO_VNET(curthread));
ifp = ifunit_ref(name);
CURVNET_RESTORE();
if (ifp == NULL)
return (0);
retval = if_getindex(ifp);
if_rele(ifp);
return (retval);
}
int krping_doit(char *cmd)
{
struct krping_cb *cb;
int op;
int ret = 0;
char *optarg;
char *scope;
unsigned long optint;
cb = kzalloc(sizeof(*cb), GFP_KERNEL);
if (!cb)
return -ENOMEM;
mutex_lock(&krping_mutex);
list_add_tail(&cb->list, &krping_cbs);
mutex_unlock(&krping_mutex);
cb->server = -1;
cb->state = IDLE;
cb->size = 64;
cb->txdepth = RPING_SQ_DEPTH;
init_waitqueue_head(&cb->sem);
while ((op = krping_getopt("krping", &cmd, krping_opts, NULL, &optarg,
&optint)) != 0) {
switch (op) {
case 'a':
cb->addr_str = optarg;
cb->addr_type = AF_INET;
DEBUG_LOG("ipaddr (%s)\n", optarg);
if (inet_pton(AF_INET, optarg, cb->addr) != 1) {
printk(KERN_ERR PFX "bad addr string %s\n",
optarg);
ret = EINVAL;
}
break;
case 'A':
cb->addr_str = optarg;
cb->addr_type = AF_INET6;
DEBUG_LOG("ipv6addr (%s)\n", optarg);
scope = strstr(optarg, "%");
/* extract scope ID, if any */
if (scope != NULL)
*scope++ = 0;
/* extract IPv6 network address */
if (inet_pton(AF_INET6, optarg, cb->addr) != 1) {
printk(KERN_ERR PFX "bad addr string %s\n",
optarg);
ret = EINVAL;
} else if (IN6_IS_SCOPE_LINKLOCAL((struct in6_addr *)cb->addr) ||
IN6_IS_ADDR_MC_INTFACELOCAL((struct in6_addr *)cb->addr)) {
uint16_t scope_id = krping_get_ipv6_scope_id(scope);
DEBUG_LOG("ipv6 scope ID = %d\n", scope_id);
cb->addr[2] = scope_id >> 8;
cb->addr[3] = scope_id & 0xFF;
}
break;
case 'p':
cb->port = htons(optint);
DEBUG_LOG("port %d\n", (int)optint);
break;
case 'P':
cb->poll = 1;
DEBUG_LOG("server\n");
break;
case 's':
cb->server = 1;
DEBUG_LOG("server\n");
break;
case 'c':
cb->server = 0;
DEBUG_LOG("client\n");
break;
case 'S':
cb->size = optint;
if ((cb->size < 1) ||
(cb->size > RPING_BUFSIZE)) {
printk(KERN_ERR PFX "Invalid size %d "
"(valid range is 1 to %d)\n",
cb->size, RPING_BUFSIZE);
ret = EINVAL;
} else
DEBUG_LOG("size %d\n", (int)optint);
break;
case 'C':
cb->count = optint;
if (cb->count < 0) {
printk(KERN_ERR PFX "Invalid count %d\n",
cb->count);
ret = EINVAL;
} else
DEBUG_LOG("count %d\n", (int) cb->count);
break;
case 'v':
cb->verbose++;
DEBUG_LOG("verbose\n");
break;
case 'V':
cb->validate++;
DEBUG_LOG("validate data\n");
break;
case 'l':
cb->wlat++;
break;
case 'L':
cb->rlat++;
break;
case 'B':
cb->bw++;
break;
case 'd':
cb->duplex++;
break;
case 'I':
cb->server_invalidate = 1;
break;
case 't':
cb->tos = optint;
DEBUG_LOG("type of service, tos=%d\n", (int) cb->tos);
break;
case 'T':
cb->txdepth = optint;
DEBUG_LOG("txdepth %d\n", (int) cb->txdepth);
break;
case 'Z':
cb->local_dma_lkey = 1;
DEBUG_LOG("using local dma lkey\n");
break;
case 'R':
cb->read_inv = 1;
DEBUG_LOG("using read-with-inv\n");
break;
case 'f':
cb->frtest = 1;
DEBUG_LOG("fast-reg test!\n");
break;
default:
printk(KERN_ERR PFX "unknown opt %s\n", optarg);
ret = -EINVAL;
break;
}
}
if (ret)
goto out;
if (cb->server == -1) {
printk(KERN_ERR PFX "must be either client or server\n");
ret = -EINVAL;
goto out;
}
if (cb->server && cb->frtest) {
printk(KERN_ERR PFX "must be client to run frtest\n");
ret = -EINVAL;
goto out;
}
if ((cb->frtest + cb->bw + cb->rlat + cb->wlat) > 1) {
printk(KERN_ERR PFX "Pick only one test: fr, bw, rlat, wlat\n");
ret = -EINVAL;
goto out;
}
if (cb->wlat || cb->rlat || cb->bw) {
printk(KERN_ERR PFX "wlat, rlat, and bw tests only support mem_mode MR - which is no longer supported\n");
ret = -EINVAL;
goto out;
}
cb->cm_id = rdma_create_id(TD_TO_VNET(curthread), krping_cma_event_handler, cb, RDMA_PS_TCP, IB_QPT_RC);
if (IS_ERR(cb->cm_id)) {
ret = PTR_ERR(cb->cm_id);
printk(KERN_ERR PFX "rdma_create_id error %d\n", ret);
goto out;
}
DEBUG_LOG("created cm_id %p\n", cb->cm_id);
if (cb->server)
krping_run_server(cb);
else
krping_run_client(cb);
DEBUG_LOG("destroy cm_id %p\n", cb->cm_id);
rdma_destroy_id(cb->cm_id);
out:
mutex_lock(&krping_mutex);
list_del(&cb->list);
mutex_unlock(&krping_mutex);
kfree(cb);
return ret;
}
void
krping_walk_cb_list(void (*f)(struct krping_stats *, void *), void *arg)
{
struct krping_cb *cb;
mutex_lock(&krping_mutex);
list_for_each_entry(cb, &krping_cbs, list)
(*f)(cb->pd ? &cb->stats : NULL, arg);
mutex_unlock(&krping_mutex);
}
void
krping_cancel_all(void)
{
struct krping_cb *cb;
mutex_lock(&krping_mutex);
list_for_each_entry(cb, &krping_cbs, list) {
cb->state = ERROR;
wake_up_interruptible(&cb->sem);
}
mutex_unlock(&krping_mutex);
}
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