[SCSI] 2.6 aacraid: Variable FIB size (updated patch)

New code from the Adaptec driver.  Performance enhancement for newer
adapters.  I hope that this isn't too big for a single patch.  I believe
that other than the few small cleanups mentioned, that the changes are
all related.

- Added Variable FIB size negotiation for new adapters.
- Added support to maximize scatter gather tables and thus permit
  requests larger than 64KB/each.
- Limit Scatter Gather to 34 elements for ROMB platforms.
- aac_printf is only enabled with AAC_QUIRK_34SG
- Large FIB ioctl support
- some minor cleanup

Passes sparse check.
I have tested it on x86 and ppc64 machines.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 24 insertions, 7 deletions

diff --git a/drivers/scsi/aacraid/sa.c b/drivers/scsi/aacraid/sa.c
index 100c5a0866b4..0680249ab861 100644
--- a/drivers/scsi/aacraid/sa.c
+++ b/drivers/scsi/aacraid/sa.c
@@ -106,7 +106,10 @@ static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
                 sa_writew(dev, DoorbellReg_s,DOORBELL_3);
                 break;
         case HostShutdown:
-                //sa_sync_cmd(dev, HOST_CRASHING, 0, &ret);
+                /*
+                sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
+                NULL, NULL, NULL, NULL, NULL);
+                */
                 break;
         case FastIo:
                 sa_writew(dev, DoorbellReg_s,DOORBELL_6);
@@ -132,7 +135,9 @@ static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
  *      for its completion.
  */
 
-static int sa_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *ret)
+static int sa_sync_cmd(struct aac_dev *dev, u32 command, 
+                u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
+                u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
 {
         unsigned long start;
         int ok;
@@ -144,9 +149,10 @@ static int sa_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *ret)
          *      Write the parameters into Mailboxes 1 - 4
          */
         sa_writel(dev, Mailbox1, p1);
-        sa_writel(dev, Mailbox2, 0);
-        sa_writel(dev, Mailbox3, 0);
-        sa_writel(dev, Mailbox4, 0);
+        sa_writel(dev, Mailbox2, p2);
+        sa_writel(dev, Mailbox3, p3);
+        sa_writel(dev, Mailbox4, p4);
+
         /*
          *      Clear the synch command doorbell to start on a clean slate.
          */
@@ -188,6 +194,14 @@ static int sa_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *ret)
          */
         if (ret)
                 *ret = sa_readl(dev, Mailbox0);
+        if (r1)
+                *r1 = sa_readl(dev, Mailbox1);
+        if (r2)
+                *r2 = sa_readl(dev, Mailbox2);
+        if (r3)
+                *r3 = sa_readl(dev, Mailbox3);
+        if (r4)
+                *r4 = sa_readl(dev, Mailbox4);
         return 0;
 }
 
@@ -201,7 +215,8 @@ static int sa_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *ret)
 static void aac_sa_interrupt_adapter (struct aac_dev *dev)
 {
         u32 ret;
-        sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
+        sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
+                        &ret, NULL, NULL, NULL, NULL);
 }
 
 /**
@@ -233,7 +248,9 @@ static void aac_sa_start_adapter(struct aac_dev *dev)
         sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
         sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
         /* We can only use a 32 bit address here */
-        sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &ret);
+        sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, 
+                        (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
+                        &ret, NULL, NULL, NULL, NULL);
 }
 
 /**