[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_cmds.c b/drivers/scsi/be2iscsi/be_cmds.c
index 9cc1f55..7c75373 100644
--- a/drivers/scsi/be2iscsi/be_cmds.c
+++ b/drivers/scsi/be2iscsi/be_cmds.c
@@ -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;