linux/arch/s390/pci/pci_event.c
Sebastian Ott 1d57896638 s390/pci: split lpf
List pci functions is used to query and iterate over pci functions.
This function currently has 2 users - initial device discovery and
rescan after a machine check. Instead of having a multipurpose
function pass a callback which gets called for each pci function.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-30 08:57:17 +02:00

96 lines
2.2 KiB
C

/*
* Copyright IBM Corp. 2012
*
* Author(s):
* Jan Glauber <jang@linux.vnet.ibm.com>
*/
#define COMPONENT "zPCI"
#define pr_fmt(fmt) COMPONENT ": " fmt
#include <linux/kernel.h>
#include <linux/pci.h>
/* Content Code Description for PCI Function Error */
struct zpci_ccdf_err {
u32 reserved1;
u32 fh; /* function handle */
u32 fid; /* function id */
u32 ett : 4; /* expected table type */
u32 mvn : 12; /* MSI vector number */
u32 dmaas : 8; /* DMA address space */
u32 : 6;
u32 q : 1; /* event qualifier */
u32 rw : 1; /* read/write */
u64 faddr; /* failing address */
u32 reserved3;
u16 reserved4;
u16 pec; /* PCI event code */
} __packed;
/* Content Code Description for PCI Function Availability */
struct zpci_ccdf_avail {
u32 reserved1;
u32 fh; /* function handle */
u32 fid; /* function id */
u32 reserved2;
u32 reserved3;
u32 reserved4;
u32 reserved5;
u16 reserved6;
u16 pec; /* PCI event code */
} __packed;
static void zpci_event_log_err(struct zpci_ccdf_err *ccdf)
{
struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
zpci_err("SEI error CCD:\n");
zpci_err_hex(ccdf, sizeof(*ccdf));
dev_err(&zdev->pdev->dev, "event code: 0x%x\n", ccdf->pec);
}
static void zpci_event_log_avail(struct zpci_ccdf_avail *ccdf)
{
struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
pr_err("%s%s: availability event: fh: 0x%x fid: 0x%x event code: 0x%x reason:",
(zdev) ? dev_driver_string(&zdev->pdev->dev) : "?",
(zdev) ? dev_name(&zdev->pdev->dev) : "?",
ccdf->fh, ccdf->fid, ccdf->pec);
print_hex_dump(KERN_CONT, "ccdf", DUMP_PREFIX_OFFSET,
16, 1, ccdf, sizeof(*ccdf), false);
switch (ccdf->pec) {
case 0x0301:
zpci_enable_device(zdev);
break;
case 0x0302:
clp_add_pci_device(ccdf->fid, ccdf->fh, 0);
break;
case 0x0306:
clp_rescan_pci_devices();
break;
default:
break;
}
}
void zpci_event_error(void *data)
{
struct zpci_ccdf_err *ccdf = data;
struct zpci_dev *zdev;
zpci_event_log_err(ccdf);
zdev = get_zdev_by_fid(ccdf->fid);
if (!zdev) {
pr_err("Error event for unknown fid: %x", ccdf->fid);
return;
}
}
void zpci_event_availability(void *data)
{
zpci_event_log_avail(data);
}