[SCSI] aacraid: Newer adapter communication iterface support

Received from Mark Salyzyn.

This patch adds the 'new comm' interface, which modern AAC based
adapters that are less than a year old support in the name of much
improved performance. These modern adapters support both the legacy and
the 'new comm' interfaces.

Signed-off-by: Mark Haverkamp <markh@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c
index 59a341b2aedc..82821d331c07 100644
--- a/drivers/scsi/aacraid/comminit.c
+++ b/drivers/scsi/aacraid/comminit.c
@@ -116,6 +116,10 @@ static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long co
         }
 
         init->InitFlags = 0;
+        if (dev->new_comm_interface) {
+                init->InitFlags = cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
+                dprintk((KERN_WARNING"aacraid: New Comm Interface enabled\n"));
+        }
         init->MaxIoCommands = cpu_to_le32(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
         init->MaxIoSize = cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
         init->MaxFibSize = cpu_to_le32(dev->max_fib_size);
@@ -315,12 +319,33 @@ struct aac_dev *aac_init_adapter(struct aac_dev *dev)
                 - sizeof(struct aac_fibhdr)
                 - sizeof(struct aac_write) + sizeof(struct sgentry))
                         / sizeof(struct sgentry);
+        dev->new_comm_interface = 0;
         dev->raw_io_64 = 0;
         if ((!aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES,
                 0, 0, 0, 0, 0, 0, status+0, status+1, status+2, NULL, NULL)) &&
                         (status[0] == 0x00000001)) {
                 if (status[1] & AAC_OPT_NEW_COMM_64)
                         dev->raw_io_64 = 1;
+                if (status[1] & AAC_OPT_NEW_COMM)
+                        dev->new_comm_interface = dev->a_ops.adapter_send != 0;
+                if (dev->new_comm_interface && (status[2] > dev->base_size)) {
+                        iounmap(dev->regs.sa);
+                        dev->base_size = status[2];
+                        dprintk((KERN_DEBUG "ioremap(%lx,%d)\n",
+                          host->base, status[2]));
+                        dev->regs.sa = ioremap(host->base, status[2]);
+                        if (dev->regs.sa == NULL) {
+                                /* remap failed, go back ... */
+                                dev->new_comm_interface = 0;
+                                dev->regs.sa = ioremap(host->base, 
+                                                AAC_MIN_FOOTPRINT_SIZE);
+                                if (dev->regs.sa == NULL) {     
+                                        printk(KERN_WARNING
+                                          "aacraid: unable to map adapter.\n");
+                                        return NULL;
+                                }
+                        }
+                }
         }
         if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
           0, 0, 0, 0, 0, 0,