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https://github.com/followmsi/android_kernel_google_msm.git
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[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 <willy@linux.intel.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Matthew Wilcox
James Bottomley
parent
50865c1d38
commit
9ec76fbf7d
2 changed files with 26 additions and 146 deletions
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@ -310,8 +310,6 @@ static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
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}
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qpti->dev_param[i].device_enable = 1;
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}
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/* this is very important to set! */
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qpti->sbits = 1 << qpti->scsi_id;
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}
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static int qlogicpti_reset_hardware(struct Scsi_Host *host)
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@ -951,153 +949,35 @@ static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int
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host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
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}
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static unsigned int scsi_rbuf_get(struct scsi_cmnd *cmd, unsigned char **buf_out)
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static int qlogicpti_slave_configure(struct scsi_device *sdev)
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{
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unsigned char *buf;
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unsigned int buflen;
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struct qlogicpti *qpti = shost_priv(sdev->host);
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int tgt = sdev->id;
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u_short param[6];
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if (cmd->use_sg) {
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struct scatterlist *sg;
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sg = (struct scatterlist *) cmd->request_buffer;
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buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
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buflen = sg->length;
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/* tags handled in midlayer */
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/* enable sync mode? */
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if (sdev->sdtr) {
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qpti->dev_param[tgt].device_flags |= 0x10;
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} else {
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buf = cmd->request_buffer;
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buflen = cmd->request_bufflen;
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qpti->dev_param[tgt].synchronous_offset = 0;
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qpti->dev_param[tgt].synchronous_period = 0;
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}
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/* are we wide capable? */
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if (sdev->wdtr)
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qpti->dev_param[tgt].device_flags |= 0x20;
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*buf_out = buf;
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return buflen;
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}
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static void scsi_rbuf_put(struct scsi_cmnd *cmd, unsigned char *buf)
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{
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if (cmd->use_sg) {
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struct scatterlist *sg;
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sg = (struct scatterlist *) cmd->request_buffer;
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kunmap_atomic(buf - sg->offset, KM_IRQ0);
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param[0] = MBOX_SET_TARGET_PARAMS;
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param[1] = (tgt << 8);
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param[2] = (qpti->dev_param[tgt].device_flags << 8);
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if (qpti->dev_param[tgt].device_flags & 0x10) {
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param[3] = (qpti->dev_param[tgt].synchronous_offset << 8) |
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qpti->dev_param[tgt].synchronous_period;
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} else {
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param[3] = 0;
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}
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}
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/*
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* Until we scan the entire bus with inquiries, go throught this fella...
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*/
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static void ourdone(struct scsi_cmnd *Cmnd)
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{
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struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
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int tgt = Cmnd->device->id;
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void (*done) (struct scsi_cmnd *);
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/* This grot added by DaveM, blame him for ugliness.
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* The issue is that in the 2.3.x driver we use the
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* host_scribble portion of the scsi command as a
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* completion linked list at interrupt service time,
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* so we have to store the done function pointer elsewhere.
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*/
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done = (void (*)(struct scsi_cmnd *))
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(((unsigned long) Cmnd->SCp.Message)
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#ifdef __sparc_v9__
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| ((unsigned long) Cmnd->SCp.Status << 32UL)
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#endif
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);
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if ((qpti->sbits & (1 << tgt)) == 0) {
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int ok = host_byte(Cmnd->result) == DID_OK;
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if (Cmnd->cmnd[0] == 0x12 && ok) {
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unsigned char *iqd;
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unsigned int iqd_len;
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iqd_len = scsi_rbuf_get(Cmnd, &iqd);
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/* tags handled in midlayer */
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/* enable sync mode? */
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if (iqd[7] & 0x10) {
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qpti->dev_param[tgt].device_flags |= 0x10;
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} else {
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qpti->dev_param[tgt].synchronous_offset = 0;
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qpti->dev_param[tgt].synchronous_period = 0;
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}
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/* are we wide capable? */
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if (iqd[7] & 0x20) {
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qpti->dev_param[tgt].device_flags |= 0x20;
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}
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scsi_rbuf_put(Cmnd, iqd);
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qpti->sbits |= (1 << tgt);
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} else if (!ok) {
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qpti->sbits |= (1 << tgt);
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}
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}
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done(Cmnd);
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}
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static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *));
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static int qlogicpti_queuecommand_slow(struct scsi_cmnd *Cmnd,
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void (*done)(struct scsi_cmnd *))
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{
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struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
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/*
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* done checking this host adapter?
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* If not, then rewrite the command
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* to finish through ourdone so we
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* can peek at Inquiry data results.
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*/
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if (qpti->sbits && qpti->sbits != 0xffff) {
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/* See above about in ourdone this ugliness... */
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Cmnd->SCp.Message = ((unsigned long)done) & 0xffffffff;
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#ifdef CONFIG_SPARC64
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Cmnd->SCp.Status = ((unsigned long)done >> 32UL) & 0xffffffff;
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#endif
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return qlogicpti_queuecommand(Cmnd, ourdone);
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}
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/*
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* We've peeked at all targets for this bus- time
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* to set parameters for devices for real now.
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*/
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if (qpti->sbits == 0xffff) {
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int i;
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for(i = 0; i < MAX_TARGETS; i++) {
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u_short param[6];
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param[0] = MBOX_SET_TARGET_PARAMS;
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param[1] = (i << 8);
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param[2] = (qpti->dev_param[i].device_flags << 8);
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if (qpti->dev_param[i].device_flags & 0x10) {
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param[3] = (qpti->dev_param[i].synchronous_offset << 8) |
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qpti->dev_param[i].synchronous_period;
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} else {
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param[3] = 0;
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}
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(void) qlogicpti_mbox_command(qpti, param, 0);
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}
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/*
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* set to zero so any traverse through ourdone
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* doesn't start the whole process again,
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*/
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qpti->sbits = 0;
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}
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/* check to see if we're done with all adapters... */
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for (qpti = qptichain; qpti != NULL; qpti = qpti->next) {
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if (qpti->sbits) {
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break;
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}
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}
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/*
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* if we hit the end of the chain w/o finding adapters still
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* capability-configuring, then we're done with all adapters
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* and can rock on..
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*/
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if (qpti == NULL)
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Cmnd->device->host->hostt->queuecommand = qlogicpti_queuecommand;
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return qlogicpti_queuecommand(Cmnd, done);
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qlogicpti_mbox_command(qpti, param, 0);
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return 0;
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}
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/*
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@ -1390,7 +1270,8 @@ static struct scsi_host_template qpti_template = {
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.module = THIS_MODULE,
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.name = "qlogicpti",
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.info = qlogicpti_info,
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.queuecommand = qlogicpti_queuecommand_slow,
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.queuecommand = qlogicpti_queuecommand,
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.slave_configure = qlogicpti_slave_configure,
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.eh_abort_handler = qlogicpti_abort,
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.eh_bus_reset_handler = qlogicpti_reset,
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.can_queue = QLOGICPTI_REQ_QUEUE_LEN,
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@ -380,8 +380,7 @@ struct qlogicpti {
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unsigned char swsreg;
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unsigned int
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gotirq : 1, /* this instance got an irq */
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is_pti : 1, /* Non-zero if this is a PTI board. */
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sbits : 16; /* syncmode known bits */
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is_pti : 1; /* Non-zero if this is a PTI board. */
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};
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/* How to twiddle them bits... */
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