[PATCH 4/10] scsi: megaraid_sas - Add New SAS 2 (iMR) controller support to the driver

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Add the new MegaRAID SAS controller (0x73) support to the driver.

Signed-off-by Bo Yang<bo.yang@xxxxxxx>

---
drivers/scsi/megaraid/megaraid_sas.c |  139 +++++++++++++++++++++++++++++++++--
 drivers/scsi/megaraid/megaraid_sas.h |    4 +
 2 files changed, 138 insertions(+), 5 deletions(-)

diff -rupN linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.c linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.c
--- linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.c      2009-05-04 20:17:46.000000000 -0400
+++ linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.c       2009-05-04 20:19:05.000000000 -0400
@@ -76,6 +76,10 @@ static struct pci_device_id megasas_pci_
        /* gen2*/
        {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0079GEN2)},
        /* gen2*/
+       {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0073SKINNY)},
+       /* skinny*/
+       {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0071SKINNY)},
+       /* skinny*/
        {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
        /* xscale IOP, vega */
        {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
@@ -334,6 +338,99 @@ static struct megasas_instance_template
 };

 /**
+ * megasas_enable_intr_skinny -        Enables interrupts
+ * @regs:                      MFI register set
+ */
+static inline void
+megasas_enable_intr_skinny(struct megasas_register_set __iomem *regs)
+{
+       writel(0xFFFFFFFF, &(regs)->outbound_intr_mask);
+
+       writel(~MFI_SKINNY_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
+
+       /* Dummy readl to force pci flush */
+       readl(&regs->outbound_intr_mask);
+}
+
+/**
+ * megasas_disable_intr_skinny -       Disables interrupt
+ * @regs:                      MFI register set
+ */
+static inline void
+megasas_disable_intr_skinny(struct megasas_register_set __iomem *regs)
+{
+       u32 mask = 0xFFFFFFFF;
+       writel(mask, &regs->outbound_intr_mask);
+       /* Dummy readl to force pci flush */
+       readl(&regs->outbound_intr_mask);
+}
+
+/**
+ * megasas_read_fw_status_reg_skinny - returns the current FW status value
+ * @regs:                      MFI register set
+ */
+static u32
+megasas_read_fw_status_reg_skinny(struct megasas_register_set __iomem *regs)
+{
+       return readl(&(regs)->outbound_scratch_pad);
+}
+
+/**
+ * megasas_clear_interrupt_skinny -    Check & clear interrupt
+ * @regs:                              MFI register set
+ */
+static int
+megasas_clear_intr_skinny(struct megasas_register_set __iomem *regs)
+{
+       u32 status;
+       /*
+        * Check if it is our interrupt
+        */
+       status = readl(&regs->outbound_intr_status);
+
+       if (!(status & MFI_SKINNY_ENABLE_INTERRUPT_MASK)) {
+               return 1;
+       }
+
+       /*
+        * Clear the interrupt by writing back the same value
+        */
+       writel(status, &regs->outbound_intr_status);
+
+       /*
+       * dummy read to flush PCI
+       */
+       readl(&regs->outbound_intr_status);
+
+       return 0;
+}
+
+/**
+ * megasas_fire_cmd_skinny -   Sends command to the FW
+ * @frame_phys_addr :          Physical address of cmd
+ * @frame_count :              Number of frames for the command
+ * @regs :                     MFI register set
+ */
+static inline void
+megasas_fire_cmd_skinny(dma_addr_t frame_phys_addr, u32 frame_count,
+                       struct megasas_register_set __iomem *regs)
+{
+       writel(0, &(regs)->inbound_high_queue_port);
+       writel((frame_phys_addr | (frame_count<<1))|1,
+                       &(regs)->inbound_low_queue_port);
+       /*msleep(5);*/
+}
+
+static struct megasas_instance_template megasas_instance_template_skinny = {
+
+       .fire_cmd = megasas_fire_cmd_skinny,
+       .enable_intr = megasas_enable_intr_skinny,
+       .disable_intr = megasas_disable_intr_skinny,
+       .clear_intr = megasas_clear_intr_skinny,
+       .read_fw_status_reg = megasas_read_fw_status_reg_skinny,
+};
+
+/**
 *      The following functions are defined for gen2 (deviceid : 0x78 0x79)
 *      controllers
 */
@@ -1582,16 +1679,34 @@ megasas_transition_to_ready(struct megas
                        /*
                         * Set the CLR bit in inbound doorbell
                         */
-                       writel(MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
-                               &instance->reg_set->inbound_doorbell);
+                       if ((instance->pdev->device == \
+                               PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
+                               (instance->pdev->device ==
+                               PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
+
+                               writel(
+                                 MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
+                                 &instance->reg_set->reserved_0[0]);
+                       } else {
+                               writel(
+                                   MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
+                                       &instance->reg_set->inbound_doorbell);
+                       }

                        max_wait = 2;
                        cur_state = MFI_STATE_WAIT_HANDSHAKE;
                        break;

                case MFI_STATE_BOOT_MESSAGE_PENDING:
-                       writel(MFI_INIT_HOTPLUG,
-                               &instance->reg_set->inbound_doorbell);
+                       if ((instance->pdev->device ==
+                               PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
+                       (instance->pdev->device ==
+                               PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
+                               writel(MFI_INIT_HOTPLUG,
+                               &instance->reg_set->reserved_0[0]);
+                       } else
+                               writel(MFI_INIT_HOTPLUG,
+                                       &instance->reg_set->inbound_doorbell);

                        max_wait = 10;
                        cur_state = MFI_STATE_BOOT_MESSAGE_PENDING;
@@ -1602,7 +1717,15 @@ megasas_transition_to_ready(struct megas
                         * Bring it to READY state; assuming max wait 10 secs
                         */
                        instance->instancet->disable_intr(instance->reg_set);
-                       writel(MFI_RESET_FLAGS, &instance->reg_set->inbound_doorbell);
+                       if ((instance->pdev->device ==
+                               PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
+                               (instance->pdev->device ==
+                               PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
+                               writel(MFI_RESET_FLAGS,
+                               &instance->reg_set->reserved_0[0]);
+                       } else
+                               writel(MFI_RESET_FLAGS,
+                               &instance->reg_set->inbound_doorbell);

                        max_wait = 60;
                        cur_state = MFI_STATE_OPERATIONAL;
@@ -2107,6 +2230,8 @@ static int megasas_init_mfi(struct megas
         * Map the message registers
         */
        if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1078GEN2) ||
+               (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
+               (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
                (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0079GEN2)) {
                instance->base_addr = pci_resource_start(instance->pdev, 1);
        } else {
@@ -2137,6 +2262,10 @@ static int megasas_init_mfi(struct megas
                case PCI_DEVICE_ID_LSI_SAS0079GEN2:
                        instance->instancet = &megasas_instance_template_gen2;
                        break;
+               case PCI_DEVICE_ID_LSI_SAS0073SKINNY:
+               case PCI_DEVICE_ID_LSI_SAS0071SKINNY:
+                       instance->instancet = &megasas_instance_template_skinny;
+                       break;
                case PCI_DEVICE_ID_LSI_SAS1064R:
                case PCI_DEVICE_ID_DELL_PERC5:
                default:
diff -rupN linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.h linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.h
--- linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.h      2009-05-04 20:17:47.000000000 -0400
+++ linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.h       2009-05-04 20:00:32.000000000 -0400
@@ -30,6 +30,8 @@
 #define        PCI_DEVICE_ID_LSI_VERDE_ZCR             0x0413
 #define        PCI_DEVICE_ID_LSI_SAS1078GEN2           0x0078
 #define        PCI_DEVICE_ID_LSI_SAS0079GEN2           0x0079
+#define        PCI_DEVICE_ID_LSI_SAS0073SKINNY         0x0073
+#define        PCI_DEVICE_ID_LSI_SAS0071SKINNY         0x0071

 /*
  * =====================================
@@ -595,6 +597,8 @@ struct megasas_ctrl_info {
 #define MFI_REPLY_1078_MESSAGE_INTERRUPT       0x80000000
 #define MFI_REPLY_GEN2_MESSAGE_INTERRUPT       0x00000001
 #define MFI_GEN2_ENABLE_INTERRUPT_MASK         (0x00000001 | 0x00000004)
+#define MFI_REPLY_SKINNY_MESSAGE_INTERRUPT     0x40000000
+#define MFI_SKINNY_ENABLE_INTERRUPT_MASK       (0x00000001)

 /*
 * register set for both 1068 and 1078 controllers
--
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