[SCSI] 3ware 9000: Add support for 9550SX controllers

Signed-off-by: Adam Radford <linuxraid@amcc.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 47 insertions, 8 deletions

diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
index a6ac61611f35..a748fbfb6692 100644
--- a/drivers/scsi/3w-9xxx.c
+++ b/drivers/scsi/3w-9xxx.c
@@ -60,6 +60,7 @@
                  Remove un-needed eh_abort handler.
                  Add support for embedded firmware error strings.
    2.26.02.003 - Correctly handle single sgl's with use_sg=1.
+   2.26.02.004 - Add support for 9550SX controllers.
 */
 
 #include <linux/module.h>
@@ -82,7 +83,7 @@
 #include "3w-9xxx.h"
 
 /* Globals */
-#define TW_DRIVER_VERSION "2.26.02.003"
+#define TW_DRIVER_VERSION "2.26.02.004"
 static TW_Device_Extension *twa_device_extension_list[TW_MAX_SLOT];
 static unsigned int twa_device_extension_count;
 static int twa_major = -1;
@@ -892,11 +893,6 @@ static int twa_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value)
                 writel(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
         }
 
-        if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) {
-                TW_PRINTK(tw_dev->host, TW_DRIVER, 0xf, "SBUF Write Error: clearing");
-                writel(TW_CONTROL_CLEAR_SBUF_WRITE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
-        }
-
         if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
                 if (tw_dev->reset_print == 0) {
                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Microcontroller Error: clearing");
@@ -930,6 +926,36 @@ out:
         return retval;
 } /* End twa_empty_response_queue() */
 
+/* This function will clear the pchip/response queue on 9550SX */
+static int twa_empty_response_queue_large(TW_Device_Extension *tw_dev)
+{
+        u32 status_reg_value, response_que_value;
+        int count = 0, retval = 1;
+
+        if (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9550SX) {
+                status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
+
+                while (((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) && (count < TW_MAX_RESPONSE_DRAIN)) {
+                        response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR_LARGE(tw_dev));
+                        if ((response_que_value & TW_9550SX_DRAIN_COMPLETED) == TW_9550SX_DRAIN_COMPLETED) {
+                                /* P-chip settle time */
+                                msleep(500);
+                                retval = 0;
+                                goto out;
+                        }
+                        status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
+                        count++;
+                }
+                if (count == TW_MAX_RESPONSE_DRAIN)
+                        goto out;
+                
+                retval = 0;
+        } else
+                retval = 0;
+out:
+        return retval;
+} /* End twa_empty_response_queue_large() */
+
 /* This function passes sense keys from firmware to scsi layer */
 static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host)
 {
@@ -1613,8 +1639,16 @@ static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset)
         int tries = 0, retval = 1, flashed = 0, do_soft_reset = soft_reset;
 
         while (tries < TW_MAX_RESET_TRIES) {
-                if (do_soft_reset)
+                if (do_soft_reset) {
                         TW_SOFT_RESET(tw_dev);
+                        /* Clear pchip/response queue on 9550SX */
+                        if (twa_empty_response_queue_large(tw_dev)) {
+                                TW_PRINTK(tw_dev->host, TW_DRIVER, 0x36, "Response queue (large) empty failed during reset sequence");
+                                do_soft_reset = 1;
+                                tries++;
+                                continue;
+                        }
+                }
 
                 /* Make sure controller is in a good state */
                 if (twa_poll_status(tw_dev, TW_STATUS_MICROCONTROLLER_READY | (do_soft_reset == 1 ? TW_STATUS_ATTENTION_INTERRUPT : 0), 60)) {
@@ -2034,7 +2068,10 @@ static int __devinit twa_probe(struct pci_dev *pdev, const struct pci_device_id
                 goto out_free_device_extension;
         }
 
-        mem_addr = pci_resource_start(pdev, 1);
+        if (pdev->device == PCI_DEVICE_ID_3WARE_9000)
+                mem_addr = pci_resource_start(pdev, 1);
+        else
+                mem_addr = pci_resource_start(pdev, 2);
 
         /* Save base address */
         tw_dev->base_addr = ioremap(mem_addr, PAGE_SIZE);
@@ -2148,6 +2185,8 @@ static void twa_remove(struct pci_dev *pdev)
 static struct pci_device_id twa_pci_tbl[] __devinitdata = {
         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9000,
           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+        { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9550SX,
+          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
         { }
 };
 MODULE_DEVICE_TABLE(pci, twa_pci_tbl);