1 files changed, 21 insertions, 7 deletions

diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c
index 0fd115c04e59..bfd7983045b7 100644
--- a/drivers/scsi/stex.c
+++ b/drivers/scsi/stex.c
@@ -121,7 +121,8 @@ enum {
 
         st_shasta                               = 0,
         st_vsc                                  = 1,
-        st_yosemite                             = 2,
+        st_vsc1                                 = 2,
+        st_yosemite                             = 3,
 
         PASSTHRU_REQ_TYPE                       = 0x00000001,
         PASSTHRU_REQ_NO_WAKEUP                  = 0x00000100,
@@ -151,6 +152,8 @@ enum {
         MGT_CMD_SIGNATURE                       = 0xba,
 
         INQUIRY_EVPD                            = 0x01,
+
+        ST_ADDITIONAL_MEM                       = 0x200000,
 };
 
 /* SCSI inquiry data */
@@ -212,7 +215,9 @@ struct handshake_frame {
         __le32 partner_ver_minor;
         __le32 partner_ver_oem;
         __le32 partner_ver_build;
-        u32 reserved1[4];
+        __le32 extra_offset;    /* NEW */
+        __le32 extra_size;      /* NEW */
+        u32 reserved1[2];
 };
 
 struct req_msg {
@@ -303,6 +308,7 @@ struct st_hba {
         void __iomem *mmio_base;        /* iomapped PCI memory space */
         void *dma_mem;
         dma_addr_t dma_handle;
+        size_t dma_size;
 
         struct Scsi_Host *host;
         struct pci_dev *pdev;
@@ -941,6 +947,11 @@ static int stex_handshake(struct st_hba *hba)
         h->status_cnt = cpu_to_le16(MU_STATUS_COUNT);
         stex_gettime(&h->hosttime);
         h->partner_type = HMU_PARTNER_TYPE;
+        if (hba->dma_size > STEX_BUFFER_SIZE) {
+                h->extra_offset = cpu_to_le32(STEX_BUFFER_SIZE);
+                h->extra_size = cpu_to_le32(ST_ADDITIONAL_MEM);
+        } else
+                h->extra_offset = h->extra_size = 0;
 
         status_phys = hba->dma_handle + MU_REQ_BUFFER_SIZE;
         writel(status_phys, base + IMR0);
@@ -1203,8 +1214,13 @@ stex_probe(struct pci_dev *pdev, const struct pci_device_id *id)
                 goto out_iounmap;
         }
 
+        hba->cardtype = (unsigned int) id->driver_data;
+        if (hba->cardtype == st_vsc && (pdev->subsystem_device & 0xf) == 0x1)
+                hba->cardtype = st_vsc1;
+        hba->dma_size = (hba->cardtype == st_vsc1) ?
+                (STEX_BUFFER_SIZE + ST_ADDITIONAL_MEM) : (STEX_BUFFER_SIZE);
         hba->dma_mem = dma_alloc_coherent(&pdev->dev,
-                STEX_BUFFER_SIZE, &hba->dma_handle, GFP_KERNEL);
+                hba->dma_size, &hba->dma_handle, GFP_KERNEL);
         if (!hba->dma_mem) {
                 err = -ENOMEM;
                 printk(KERN_ERR DRV_NAME "(%s): dma mem alloc failed\n",
@@ -1217,8 +1233,6 @@ stex_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         hba->copy_buffer = hba->dma_mem + MU_BUFFER_SIZE;
         hba->mu_status = MU_STATE_STARTING;
 
-        hba->cardtype = (unsigned int) id->driver_data;
-
         /* firmware uses id/lun pair for a logical drive, but lun would be
            always 0 if CONFIG_SCSI_MULTI_LUN not configured, so we use
            channel to map lun here */
@@ -1266,7 +1280,7 @@ stex_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 out_free_irq:
         free_irq(pdev->irq, hba);
 out_pci_free:
-        dma_free_coherent(&pdev->dev, STEX_BUFFER_SIZE,
+        dma_free_coherent(&pdev->dev, hba->dma_size,
                           hba->dma_mem, hba->dma_handle);
 out_iounmap:
         iounmap(hba->mmio_base);
@@ -1327,7 +1341,7 @@ static void stex_hba_free(struct st_hba *hba)
 
         pci_release_regions(hba->pdev);
 
-        dma_free_coherent(&hba->pdev->dev, STEX_BUFFER_SIZE,
+        dma_free_coherent(&hba->pdev->dev, hba->dma_size,
                           hba->dma_mem, hba->dma_handle);
 }