[PATCH 3/4] scsi: megaraid_sas - Add the new controllers support

From: Yang, Bo
Date: Fri Aug 01 2008 - 17:27:16 EST

Add the new controllers (0x78 0x79) support to the driver. Those controllers are LSI's next generation (gen2) SAS controllers.

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

---
drivers/scsi/megaraid/megaraid_sas.c | 111 ++++++++++++++++++++++++++++++++++-
drivers/scsi/megaraid/megaraid_sas.h | 4 +
2 files changed, 113 insertions(+), 2 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 2008-07-31 12:56:07.000000000 -0400
+++ linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.c 2008-07-31 13:32:02.000000000 -0400
@@ -10,7 +10,7 @@
* 2 of the License, or (at your option) any later version.
*
* FILE : megaraid_sas.c
- * Version : v00.00.03.20-rc1
+ * Version : v00.00.04.01-rc1
*
* Authors:
* (email-id : megaraidlinux@xxxxxxx)
@@ -71,6 +71,10 @@ static struct pci_device_id megasas_pci_
/* ppc IOP */
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078DE)},
/* ppc IOP */
+ {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078GEN2)},
+ /* 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_VERDE_ZCR)},
/* xscale IOP, vega */
{PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
@@ -324,6 +328,100 @@ static struct megasas_instance_template
};

/**
+* The following functions are defined for gen2 (deviceid : 0x78 0x79)
+* controllers
+*/
+
+/**
+ * megasas_enable_intr_gen2 - Enables interrupts
+ * @regs: MFI register set
+ */
+static inline void
+megasas_enable_intr_gen2(struct megasas_register_set __iomem *regs)
+{
+ writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
+
+ /* write ~0x00000005 (4 & 1) to the intr mask*/
+ writel(~MFI_GEN2_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
+
+ /* Dummy readl to force pci flush */
+ readl(&regs->outbound_intr_mask);
+}
+
+/**
+ * megasas_disable_intr_gen2 - Disables interrupt
+ * @regs: MFI register set
+ */
+static inline void
+megasas_disable_intr_gen2(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_gen2 - returns the current FW status value
+ * @regs: MFI register set
+ */
+static u32
+megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs)
+{
+ return readl(&(regs)->outbound_scratch_pad);
+}
+
+/**
+ * megasas_clear_interrupt_gen2 - Check & clear interrupt
+ * @regs: MFI register set
+ */
+static int
+megasas_clear_intr_gen2(struct megasas_register_set __iomem *regs)
+{
+ u32 status;
+ /*
+ * Check if it is our interrupt
+ */
+ status = readl(&regs->outbound_intr_status);
+
+ if (!(status & MFI_GEN2_ENABLE_INTERRUPT_MASK)) {
+ return 1;
+ }
+
+ /*
+ * Clear the interrupt by writing back the same value
+ */
+ writel(status, &regs->outbound_doorbell_clear);
+
+ /* Dummy readl to force pci flush */
+ readl(&regs->outbound_intr_status);
+
+ return 0;
+}
+/**
+ * megasas_fire_cmd_gen2 - 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_gen2(dma_addr_t frame_phys_addr, u32 frame_count,
+ struct megasas_register_set __iomem *regs)
+{
+ writel((frame_phys_addr | (frame_count<<1))|1,
+ &(regs)->inbound_queue_port);
+}
+
+static struct megasas_instance_template megasas_instance_template_gen2 = {
+
+ .fire_cmd = megasas_fire_cmd_gen2,
+ .enable_intr = megasas_enable_intr_gen2,
+ .disable_intr = megasas_disable_intr_gen2,
+ .clear_intr = megasas_clear_intr_gen2,
+ .read_fw_status_reg = megasas_read_fw_status_reg_gen2,
+};
+
+/**
* This is the end of set of functions & definitions
* specific to ppc (deviceid : 0x60) controllers
*/
@@ -1982,7 +2080,12 @@ static int megasas_init_mfi(struct megas
/*
* Map the message registers
*/
- instance->base_addr = pci_resource_start(instance->pdev, 0);
+ if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1078GEN2) ||
+ (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0079GEN2)) {
+ instance->base_addr = pci_resource_start(instance->pdev, 1);
+ } else {
+ instance->base_addr = pci_resource_start(instance->pdev, 0);
+ }

if (pci_request_regions(instance->pdev, "megasas: LSI")) {
printk(KERN_DEBUG "megasas: IO memory region busy!\n");
@@ -2004,6 +2107,10 @@ static int megasas_init_mfi(struct megas
case PCI_DEVICE_ID_LSI_SAS1078DE:
instance->instancet = &megasas_instance_template_ppc;
break;
+ case PCI_DEVICE_ID_LSI_SAS1078GEN2:
+ case PCI_DEVICE_ID_LSI_SAS0079GEN2:
+ instance->instancet = &megasas_instance_template_gen2;
+ 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 2008-07-31 12:50:41.000000000 -0400
+++ linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.h 2008-07-31 12:50:41.000000000 -0400
@@ -28,6 +28,8 @@
#define PCI_DEVICE_ID_LSI_SAS1078R 0x0060
#define PCI_DEVICE_ID_LSI_SAS1078DE 0x007C
#define PCI_DEVICE_ID_LSI_VERDE_ZCR 0x0413
+#define PCI_DEVICE_ID_LSI_SAS1078GEN2 0x0078
+#define PCI_DEVICE_ID_LSI_SAS0079GEN2 0x0079

/*
* =====================================
@@ -580,6 +582,8 @@ struct megasas_ctrl_info {
#define MEGASAS_COMPLETION_TIMER_INTERVAL (HZ/10)

#define MFI_REPLY_1078_MESSAGE_INTERRUPT 0x80000000
+#define MFI_REPLY_GEN2_MESSAGE_INTERRUPT 0x00000001
+#define MFI_GEN2_ENABLE_INTERRUPT_MASK 0x00000001 | 0x00000004

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