[SCSI] be2iscsi: Adding crashdump support
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>
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index 67a7e3f..1a22125 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -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 @@
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 @@
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 @@
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 @@
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 @@
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,