[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>

1 files changed, 80 insertions, 0 deletions

diff --git a/drivers/scsi/be2iscsi/be_cmds.c b/drivers/scsi/be2iscsi/be_cmds.c
index 9cc1f5573150..7c7537335c88 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;