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[SCSI] be2iscsi: Adding crashdump support

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These changes allow the driver to support crashdump. We need to reset the
chip incase of a crashdump

Signed-off-by: Jayamohan Kallickal <jayamohank@serverengines.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Jayamohan Kallickal 2010-07-22 04:24:53 +05:30 committed by James Bottomley
parent 5db3f33d68
commit e9b9119350
4 changed files with 141 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

80
drivers/scsi/be2iscsi/be_cmds.c
View File

@ -19,6 +19,86 @@
#include "be_mgmt.h"
#include "be_main.h"
int beiscsi_pci_soft_reset(struct beiscsi_hba *phba)
{
u32 sreset;
u8 *pci_reset_offset = 0;
u8 *pci_online0_offset = 0;
u8 *pci_online1_offset = 0;
u32 pconline0 = 0;
u32 pconline1 = 0;
u32 i;
pci_reset_offset = (u8 *)phba->pci_va + BE2_SOFT_RESET;
pci_online0_offset = (u8 *)phba->pci_va + BE2_PCI_ONLINE0;
pci_online1_offset = (u8 *)phba->pci_va + BE2_PCI_ONLINE1;
sreset = readl((void *)pci_reset_offset);
sreset |= BE2_SET_RESET;
writel(sreset, (void *)pci_reset_offset);
i = 0;
while (sreset & BE2_SET_RESET) {
if (i > 64)
break;
msleep(100);
sreset = readl((void *)pci_reset_offset);
i++;
}
if (sreset & BE2_SET_RESET) {
printk(KERN_ERR "Soft Reset did not deassert\n");
return -EIO;
}
pconline1 = BE2_MPU_IRAM_ONLINE;
writel(pconline0, (void *)pci_online0_offset);
writel(pconline1, (void *)pci_online1_offset);
sreset = BE2_SET_RESET;
writel(sreset, (void *)pci_reset_offset);
i = 0;
while (sreset & BE2_SET_RESET) {
if (i > 64)
break;
msleep(1);
sreset = readl((void *)pci_reset_offset);
i++;
}
if (sreset & BE2_SET_RESET) {
printk(KERN_ERR "MPU Online Soft Reset did not deassert\n");
return -EIO;
}
return 0;
}
int be_chk_reset_complete(struct beiscsi_hba *phba)
{
unsigned int num_loop;
u8 *mpu_sem = 0;
u32 status;
num_loop = 1000;
mpu_sem = (u8 *)phba->csr_va + MPU_EP_SEMAPHORE;
msleep(5000);
while (num_loop) {
status = readl((void *)mpu_sem);
if ((status & 0x80000000) || (status & 0x0000FFFF) == 0xC000)
break;
msleep(60);
num_loop--;
}
if ((status & 0x80000000) || (!num_loop)) {
printk(KERN_ERR "Failed in be_chk_reset_complete"
"status = 0x%x\n", status);
return -EIO;
}
return 0;
}
void be_mcc_notify(struct beiscsi_hba *phba)
{
struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;

3
drivers/scsi/be2iscsi/be_cmds.h
View File

@ -901,6 +901,9 @@ struct be_fw_cfg {
* the cxn
*/
int beiscsi_pci_soft_reset(struct beiscsi_hba *phba);
int be_chk_reset_complete(struct beiscsi_hba *phba);
void be_wrb_hdr_prepare(struct be_mcc_wrb *wrb, int payload_len,
bool embedded, u8 sge_cnt);

50
drivers/scsi/be2iscsi/be_main.c
View File

@ -41,6 +41,8 @@
static unsigned int be_iopoll_budget = 10;
static unsigned int be_max_phys_size = 64;
static unsigned int enable_msix = 1;
static unsigned int gcrashmode = 0;
static unsigned int num_hba = 0;
MODULE_DEVICE_TABLE(pci, beiscsi_pci_id_table);
MODULE_DESCRIPTION(DRV_DESC " " BUILD_STR);
@ -3731,6 +3733,8 @@ static void beiscsi_remove(struct pci_dev *pcidev)
struct hwi_context_memory *phwi_context;
struct be_eq_obj *pbe_eq;
unsigned int i, msix_vec;
u8 *real_offset = 0;
u32 value = 0;
phba = (struct beiscsi_hba *)pci_get_drvdata(pcidev);
if (!phba) {
@ -3759,6 +3763,14 @@ static void beiscsi_remove(struct pci_dev *pcidev)
beiscsi_clean_port(phba);
beiscsi_free_mem(phba);
real_offset = (u8 *)phba->csr_va + MPU_EP_SEMAPHORE;
value = readl((void *)real_offset);
if (value & 0x00010000) {
value &= 0xfffeffff;
writel(value, (void *)real_offset);
}
beiscsi_unmap_pci_function(phba);
pci_free_consistent(phba->pcidev,
phba->ctrl.mbox_mem_alloced.size,
@ -3792,6 +3804,8 @@ static int __devinit beiscsi_dev_probe(struct pci_dev *pcidev,
struct hwi_context_memory *phwi_context;
struct be_eq_obj *pbe_eq;
int ret, num_cpus, i;
u8 *real_offset = 0;
u32 value = 0;
ret = beiscsi_enable_pci(pcidev);
if (ret < 0) {
@ -3837,6 +3851,33 @@ static int __devinit beiscsi_dev_probe(struct pci_dev *pcidev,
goto hba_free;
}
if (!num_hba) {
real_offset = (u8 *)phba->csr_va + MPU_EP_SEMAPHORE;
value = readl((void *)real_offset);
if (value & 0x00010000) {
gcrashmode++;
shost_printk(KERN_ERR, phba->shost,
"Loading Driver in crashdump mode\n");
ret = beiscsi_pci_soft_reset(phba);
if (ret) {
shost_printk(KERN_ERR, phba->shost,
"Reset Failed. Aborting Crashdump\n");
goto hba_free;
}
ret = be_chk_reset_complete(phba);
if (ret) {
shost_printk(KERN_ERR, phba->shost,
"Failed to get out of reset."
"Aborting Crashdump\n");
goto hba_free;
}
} else {
value |= 0x00010000;
writel(value, (void *)real_offset);
num_hba++;
}
}
spin_lock_init(&phba->io_sgl_lock);
spin_lock_init(&phba->mgmt_sgl_lock);
spin_lock_init(&phba->isr_lock);
@ -3907,6 +3948,15 @@ free_twq:
beiscsi_clean_port(phba);
beiscsi_free_mem(phba);
free_port:
real_offset = (u8 *)phba->csr_va + MPU_EP_SEMAPHORE;
value = readl((void *)real_offset);
if (value & 0x00010000) {
value &= 0xfffeffff;
writel(value, (void *)real_offset);
}
pci_free_consistent(phba->pcidev,
phba->ctrl.mbox_mem_alloced.size,
phba->ctrl.mbox_mem_alloced.va,

9
drivers/scsi/be2iscsi/be_main.h
View File

@ -69,7 +69,14 @@
#define BEISCSI_NUM_DEVICES_SUPPORTED 0x01
#define BEISCSI_MAX_FRAGS_INIT 192
#define BE_NUM_MSIX_ENTRIES 1
#define MPU_EP_SEMAPHORE 0xac
#define MPU_EP_CONTROL 0
#define MPU_EP_SEMAPHORE 0xac
#define BE2_SOFT_RESET 0x5c
#define BE2_PCI_ONLINE0 0xb0
#define BE2_PCI_ONLINE1 0xb4
#define BE2_SET_RESET 0x80
#define BE2_MPU_IRAM_ONLINE 0x00000080
#define BE_SENSE_INFO_SIZE 258
#define BE_ISCSI_PDU_HEADER_SIZE 64