Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9ec76fbf7d6da3e98070a7059699d0ca019b0c9b
Commit:     9ec76fbf7d6da3e98070a7059699d0ca019b0c9b
Parent:     50865c1d38e3fbe17a1843582a8e10f2dbbeb6d3
Author:     Matthew Wilcox <[EMAIL PROTECTED]>
AuthorDate: Mon Oct 1 08:07:52 2007 -0600
Committer:  James Bottomley <[EMAIL PROTECTED]>
CommitDate: Fri Oct 12 14:52:38 2007 -0400

    [SCSI] qlogicpti: Add a slave_configure method
    
    By configuring targets in slave_configure, we can eliminate a shadow
    queuecommand, a shadow scsi_done, a write to the host template, abuse of
    SCp->Message and SCp->Status, a use of kmap_atomic() and sniffing the
    results of INQUIRY.
    
    Signed-off-by: Matthew Wilcox <[EMAIL PROTECTED]>
    Acked-by: David S. Miller <[EMAIL PROTECTED]>
    Signed-off-by: James Bottomley <[EMAIL PROTECTED]>
---
 drivers/scsi/qlogicpti.c |  171 +++++++---------------------------------------
 drivers/scsi/qlogicpti.h |    3 +-
 2 files changed, 27 insertions(+), 147 deletions(-)

diff --git a/drivers/scsi/qlogicpti.c b/drivers/scsi/qlogicpti.c
index 5948872..e93f803 100644
--- a/drivers/scsi/qlogicpti.c
+++ b/drivers/scsi/qlogicpti.c
@@ -310,8 +310,6 @@ static inline void qlogicpti_set_hostdev_defaults(struct 
qlogicpti *qpti)
                }
                qpti->dev_param[i].device_enable = 1;
        }
-       /* this is very important to set! */
-       qpti->sbits = 1 << qpti->scsi_id;
 }
 
 static int qlogicpti_reset_hardware(struct Scsi_Host *host)
@@ -951,153 +949,35 @@ static inline void update_can_queue(struct Scsi_Host 
*host, u_int in_ptr, u_int
        host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
 }
 
-static unsigned int scsi_rbuf_get(struct scsi_cmnd *cmd, unsigned char 
**buf_out)
+static int qlogicpti_slave_configure(struct scsi_device *sdev)
 {
-       unsigned char *buf;
-       unsigned int buflen;
-
-       if (cmd->use_sg) {
-               struct scatterlist *sg;
+       struct qlogicpti *qpti = shost_priv(sdev->host);
+       int tgt = sdev->id;
+       u_short param[6];
 
-               sg = (struct scatterlist *) cmd->request_buffer;
-               buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
-               buflen = sg->length;
+       /* tags handled in midlayer */
+       /* enable sync mode? */
+       if (sdev->sdtr) {
+               qpti->dev_param[tgt].device_flags |= 0x10;
        } else {
-               buf = cmd->request_buffer;
-               buflen = cmd->request_bufflen;
+               qpti->dev_param[tgt].synchronous_offset = 0;
+               qpti->dev_param[tgt].synchronous_period = 0;
        }
-
-       *buf_out = buf;
-       return buflen;
-}
-
-static void scsi_rbuf_put(struct scsi_cmnd *cmd, unsigned char *buf)
-{
-       if (cmd->use_sg) {
-               struct scatterlist *sg;
-
-               sg = (struct scatterlist *) cmd->request_buffer;
-               kunmap_atomic(buf - sg->offset, KM_IRQ0);
-       }
-}
-
-/*
- * Until we scan the entire bus with inquiries, go throught this fella...
- */
-static void ourdone(struct scsi_cmnd *Cmnd)
-{
-       struct qlogicpti *qpti = (struct qlogicpti *) 
Cmnd->device->host->hostdata;
-       int tgt = Cmnd->device->id;
-       void (*done) (struct scsi_cmnd *);
-
-       /* This grot added by DaveM, blame him for ugliness.
-        * The issue is that in the 2.3.x driver we use the
-        * host_scribble portion of the scsi command as a
-        * completion linked list at interrupt service time,
-        * so we have to store the done function pointer elsewhere.
-        */
-       done = (void (*)(struct scsi_cmnd *))
-               (((unsigned long) Cmnd->SCp.Message)
-#ifdef __sparc_v9__
-                | ((unsigned long) Cmnd->SCp.Status << 32UL)
-#endif
-                );
-
-       if ((qpti->sbits & (1 << tgt)) == 0) {
-               int ok = host_byte(Cmnd->result) == DID_OK;
-               if (Cmnd->cmnd[0] == 0x12 && ok) {
-                       unsigned char *iqd;
-                       unsigned int iqd_len;
-
-                       iqd_len = scsi_rbuf_get(Cmnd, &iqd);
-
-                       /* tags handled in midlayer */
-                       /* enable sync mode? */
-                       if (iqd[7] & 0x10) {
-                               qpti->dev_param[tgt].device_flags |= 0x10;
-                       } else {
-                               qpti->dev_param[tgt].synchronous_offset = 0;
-                               qpti->dev_param[tgt].synchronous_period = 0;
-                       }
-                       /* are we wide capable? */
-                       if (iqd[7] & 0x20) {
-                               qpti->dev_param[tgt].device_flags |= 0x20;
-                       }
-
-                       scsi_rbuf_put(Cmnd, iqd);
-
-                       qpti->sbits |= (1 << tgt);
-               } else if (!ok) {
-                       qpti->sbits |= (1 << tgt);
-               }
-       }
-       done(Cmnd);
-}
-
-static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct 
scsi_cmnd *));
-
-static int qlogicpti_queuecommand_slow(struct scsi_cmnd *Cmnd,
-                                      void (*done)(struct scsi_cmnd *))
-{
-       struct qlogicpti *qpti = (struct qlogicpti *) 
Cmnd->device->host->hostdata;
-
-       /*
-        * done checking this host adapter?
-        * If not, then rewrite the command
-        * to finish through ourdone so we
-        * can peek at Inquiry data results.
-        */
-       if (qpti->sbits && qpti->sbits != 0xffff) {
-               /* See above about in ourdone this ugliness... */
-               Cmnd->SCp.Message = ((unsigned long)done) & 0xffffffff;
-#ifdef CONFIG_SPARC64
-               Cmnd->SCp.Status = ((unsigned long)done >> 32UL) & 0xffffffff;
-#endif
-               return qlogicpti_queuecommand(Cmnd, ourdone);
-       }
-
-       /*
-        * We've peeked at all targets for this bus- time
-        * to set parameters for devices for real now.
-        */
-       if (qpti->sbits == 0xffff) {
-               int i;
-               for(i = 0; i < MAX_TARGETS; i++) {
-                       u_short param[6];
-                       param[0] = MBOX_SET_TARGET_PARAMS;
-                       param[1] = (i << 8);
-                       param[2] = (qpti->dev_param[i].device_flags << 8);
-                       if (qpti->dev_param[i].device_flags & 0x10) {
-                               param[3] = 
(qpti->dev_param[i].synchronous_offset << 8) |
-                                       qpti->dev_param[i].synchronous_period;
-                       } else {
-                               param[3] = 0;
-                       }
-                       (void) qlogicpti_mbox_command(qpti, param, 0);
-               }
-               /*
-                * set to zero so any traverse through ourdone
-                * doesn't start the whole process again,
-                */
-               qpti->sbits = 0;
-       }
-
-       /* check to see if we're done with all adapters... */
-       for (qpti = qptichain; qpti != NULL; qpti = qpti->next) {
-               if (qpti->sbits) {
-                       break;
-               }
+       /* are we wide capable? */
+       if (sdev->wdtr)
+               qpti->dev_param[tgt].device_flags |= 0x20;
+
+       param[0] = MBOX_SET_TARGET_PARAMS;
+       param[1] = (tgt << 8);
+       param[2] = (qpti->dev_param[tgt].device_flags << 8);
+       if (qpti->dev_param[tgt].device_flags & 0x10) {
+               param[3] = (qpti->dev_param[tgt].synchronous_offset << 8) |
+                       qpti->dev_param[tgt].synchronous_period;
+       } else {
+               param[3] = 0;
        }
-
-       /*
-        * if we hit the end of the chain w/o finding adapters still
-        * capability-configuring, then we're done with all adapters
-        * and can rock on..
-        */
-       if (qpti == NULL)
-               Cmnd->device->host->hostt->queuecommand = 
qlogicpti_queuecommand;
-
-       return qlogicpti_queuecommand(Cmnd, done);
+       qlogicpti_mbox_command(qpti, param, 0);
+       return 0;
 }
 
 /*
@@ -1390,7 +1270,8 @@ static struct scsi_host_template qpti_template = {
        .module                 = THIS_MODULE,
        .name                   = "qlogicpti",
        .info                   = qlogicpti_info,
-       .queuecommand           = qlogicpti_queuecommand_slow,
+       .queuecommand           = qlogicpti_queuecommand,
+       .slave_configure        = qlogicpti_slave_configure,
        .eh_abort_handler       = qlogicpti_abort,
        .eh_bus_reset_handler   = qlogicpti_reset,
        .can_queue              = QLOGICPTI_REQ_QUEUE_LEN,
diff --git a/drivers/scsi/qlogicpti.h b/drivers/scsi/qlogicpti.h
index 6cd1c07..ef6da2d 100644
--- a/drivers/scsi/qlogicpti.h
+++ b/drivers/scsi/qlogicpti.h
@@ -380,8 +380,7 @@ struct qlogicpti {
        unsigned char             swsreg;
        unsigned int    
                gotirq  :       1,      /* this instance got an irq */
-               is_pti  :       1,      /* Non-zero if this is a PTI board. */
-               sbits   :       16;     /* syncmode known bits */
+               is_pti  :       1;      /* Non-zero if this is a PTI board. */
 };
 
 /* How to twiddle them bits... */
-
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