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[SCSI] stex: small code fixes and changes
These are some small code fixes and changes, including: - use 64 bit when possible - remove some unnecessary code (in interrupt, queuecommand routine etc.) - code change for reset handler Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Ed Lin
James Bottomley
parent
97c8389d54
commit
f149816162
@ -160,26 +160,22 @@ struct st_sgitem {
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u8 ctrl; /* SG_CF_xxx */
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u8 reserved[3];
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__le32 count;
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__le32 addr;
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__le32 addr_hi;
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__le64 addr;
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};
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struct st_sgtable {
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__le16 sg_count;
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__le16 max_sg_count;
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__le32 sz_in_byte;
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struct st_sgitem table[ST_MAX_SG];
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};
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struct handshake_frame {
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__le32 rb_phy; /* request payload queue physical address */
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__le32 rb_phy_hi;
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__le64 rb_phy; /* request payload queue physical address */
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__le16 req_sz; /* size of each request payload */
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__le16 req_cnt; /* count of reqs the buffer can hold */
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__le16 status_sz; /* size of each status payload */
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__le16 status_cnt; /* count of status the buffer can hold */
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__le32 hosttime; /* seconds from Jan 1, 1970 (GMT) */
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__le32 hosttime_hi;
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__le64 hosttime; /* seconds from Jan 1, 1970 (GMT) */
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u8 partner_type; /* who sends this frame */
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u8 reserved0[7];
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__le32 partner_ver_major;
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@ -273,6 +269,7 @@ struct st_ccb {
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u32 req_type;
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u8 srb_status;
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u8 scsi_status;
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u8 reserved[2];
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};
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struct st_hba {
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@ -293,7 +290,6 @@ struct st_hba {
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void *copy_buffer; /* temp buffer for driver-handled commands */
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struct st_ccb ccb[MU_MAX_REQUEST];
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struct st_ccb *wait_ccb;
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wait_queue_head_t waitq;
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unsigned int mu_status;
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int out_req_cnt;
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@ -318,19 +314,17 @@ MODULE_DESCRIPTION("Promise Technology SuperTrak EX Controllers");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(ST_DRIVER_VERSION);
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static void stex_gettime(__le32 *time)
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static void stex_gettime(__le64 *time)
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{
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struct timeval tv;
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do_gettimeofday(&tv);
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*time = cpu_to_le32(tv.tv_sec & 0xffffffff);
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*(time + 1) = cpu_to_le32((tv.tv_sec >> 16) >> 16);
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*time = cpu_to_le64(tv.tv_sec);
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}
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static struct status_msg *stex_get_status(struct st_hba *hba)
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{
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struct status_msg *status =
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hba->status_buffer + hba->status_tail;
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struct status_msg *status = hba->status_buffer + hba->status_tail;
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++hba->status_tail;
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hba->status_tail %= MU_STATUS_COUNT;
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@ -366,32 +360,30 @@ static int stex_map_sg(struct st_hba *hba,
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struct scsi_cmnd *cmd;
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struct scatterlist *sg;
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struct st_sgtable *dst;
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struct st_sgitem *table;
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int i, nseg;
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cmd = ccb->cmd;
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dst = (struct st_sgtable *)req->variable;
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dst->max_sg_count = cpu_to_le16(ST_MAX_SG);
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dst->sz_in_byte = cpu_to_le32(scsi_bufflen(cmd));
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nseg = scsi_dma_map(cmd);
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if (nseg < 0)
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return -EIO;
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BUG_ON(nseg < 0);
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if (nseg) {
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dst = (struct st_sgtable *)req->variable;
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ccb->sg_count = nseg;
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dst->sg_count = cpu_to_le16((u16)nseg);
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dst->max_sg_count = cpu_to_le16(hba->host->sg_tablesize);
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dst->sz_in_byte = cpu_to_le32(scsi_bufflen(cmd));
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table = (struct st_sgitem *)(dst + 1);
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scsi_for_each_sg(cmd, sg, nseg, i) {
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dst->table[i].count = cpu_to_le32((u32)sg_dma_len(sg));
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dst->table[i].addr =
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cpu_to_le32(sg_dma_address(sg) & 0xffffffff);
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dst->table[i].addr_hi =
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cpu_to_le32((sg_dma_address(sg) >> 16) >> 16);
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dst->table[i].ctrl = SG_CF_64B | SG_CF_HOST;
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table[i].count = cpu_to_le32((u32)sg_dma_len(sg));
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table[i].addr = cpu_to_le64(sg_dma_address(sg));
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table[i].ctrl = SG_CF_64B | SG_CF_HOST;
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}
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dst->table[--i].ctrl |= SG_CF_EOT;
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table[--i].ctrl |= SG_CF_EOT;
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}
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return 0;
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return nseg;
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}
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static void stex_controller_info(struct st_hba *hba, struct st_ccb *ccb)
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@ -400,7 +392,7 @@ static void stex_controller_info(struct st_hba *hba, struct st_ccb *ccb)
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size_t count = sizeof(struct st_frame);
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p = hba->copy_buffer;
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count = scsi_sg_copy_to_buffer(ccb->cmd, p, count);
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scsi_sg_copy_to_buffer(ccb->cmd, p, count);
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memset(p->base, 0, sizeof(u32)*6);
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*(unsigned long *)(p->base) = pci_resource_start(hba->pdev, 0);
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p->rom_addr = 0;
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@ -418,15 +410,13 @@ static void stex_controller_info(struct st_hba *hba, struct st_ccb *ccb)
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p->subid =
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hba->pdev->subsystem_vendor << 16 | hba->pdev->subsystem_device;
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count = scsi_sg_copy_from_buffer(ccb->cmd, p, count);
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scsi_sg_copy_from_buffer(ccb->cmd, p, count);
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}
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static void
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stex_send_cmd(struct st_hba *hba, struct req_msg *req, u16 tag)
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{
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req->tag = cpu_to_le16(tag);
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req->task_attr = TASK_ATTRIBUTE_SIMPLE;
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req->task_manage = 0; /* not supported yet */
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hba->ccb[tag].req = req;
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hba->out_req_cnt++;
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@ -442,7 +432,7 @@ stex_slave_alloc(struct scsi_device *sdev)
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/* Cheat: usually extracted from Inquiry data */
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sdev->tagged_supported = 1;
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scsi_activate_tcq(sdev, ST_CMD_PER_LUN);
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scsi_activate_tcq(sdev, sdev->host->can_queue);
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return 0;
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}
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@ -469,7 +459,7 @@ stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
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{
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struct st_hba *hba;
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struct Scsi_Host *host;
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unsigned int id,lun;
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unsigned int id, lun;
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struct req_msg *req;
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u16 tag;
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@ -572,7 +562,6 @@ stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
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hba->ccb[tag].cmd = cmd;
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hba->ccb[tag].sense_bufflen = SCSI_SENSE_BUFFERSIZE;
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hba->ccb[tag].sense_buffer = cmd->sense_buffer;
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hba->ccb[tag].req_type = 0;
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if (cmd->sc_data_direction != DMA_NONE)
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stex_map_sg(hba, req, &hba->ccb[tag]);
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@ -586,7 +575,7 @@ static void stex_scsi_done(struct st_ccb *ccb)
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struct scsi_cmnd *cmd = ccb->cmd;
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int result;
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if (ccb->srb_status == SRB_STATUS_SUCCESS || ccb->srb_status == 0) {
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if (ccb->srb_status == SRB_STATUS_SUCCESS || ccb->srb_status == 0) {
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result = ccb->scsi_status;
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switch (ccb->scsi_status) {
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case SAM_STAT_GOOD:
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@ -626,8 +615,6 @@ static void stex_scsi_done(struct st_ccb *ccb)
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static void stex_copy_data(struct st_ccb *ccb,
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struct status_msg *resp, unsigned int variable)
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{
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size_t count = variable;
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if (resp->scsi_status != SAM_STAT_GOOD) {
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if (ccb->sense_buffer != NULL)
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memcpy(ccb->sense_buffer, resp->variable,
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@ -637,17 +624,16 @@ static void stex_copy_data(struct st_ccb *ccb,
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if (ccb->cmd == NULL)
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return;
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count = scsi_sg_copy_from_buffer(ccb->cmd, resp->variable, count);
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scsi_sg_copy_from_buffer(ccb->cmd, resp->variable, variable);
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}
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static void stex_ys_commands(struct st_hba *hba,
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static void stex_check_cmd(struct st_hba *hba,
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struct st_ccb *ccb, struct status_msg *resp)
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{
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if (ccb->cmd->cmnd[0] == MGT_CMD &&
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resp->scsi_status != SAM_STAT_CHECK_CONDITION) {
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resp->scsi_status != SAM_STAT_CHECK_CONDITION)
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scsi_set_resid(ccb->cmd, scsi_bufflen(ccb->cmd) -
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le32_to_cpu(*(__le32 *)&resp->variable[0]));
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}
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}
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static void stex_mu_intr(struct st_hba *hba, u32 doorbell)
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@ -658,7 +644,7 @@ static void stex_mu_intr(struct st_hba *hba, u32 doorbell)
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unsigned int size;
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u16 tag;
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if (!(doorbell & MU_OUTBOUND_DOORBELL_STATUSHEADCHANGED))
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if (unlikely(!(doorbell & MU_OUTBOUND_DOORBELL_STATUSHEADCHANGED)))
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return;
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/* status payloads */
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@ -693,13 +679,13 @@ static void stex_mu_intr(struct st_hba *hba, u32 doorbell)
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continue;
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}
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hba->out_req_cnt--;
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ccb = &hba->ccb[tag];
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if (hba->wait_ccb == ccb)
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if (unlikely(hba->wait_ccb == ccb))
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hba->wait_ccb = NULL;
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if (unlikely(ccb->req == NULL)) {
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printk(KERN_WARNING DRV_NAME
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"(%s): lagging req\n", pci_name(hba->pdev));
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hba->out_req_cnt--;
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continue;
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}
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@ -720,7 +706,7 @@ static void stex_mu_intr(struct st_hba *hba, u32 doorbell)
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if (likely(ccb->cmd != NULL)) {
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if (hba->cardtype == st_yosemite)
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stex_ys_commands(hba, ccb, resp);
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stex_check_cmd(hba, ccb, resp);
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if (unlikely(ccb->cmd->cmnd[0] == PASSTHRU_CMD &&
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ccb->cmd->cmnd[1] == PASSTHRU_GET_ADAPTER))
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@ -728,17 +714,8 @@ static void stex_mu_intr(struct st_hba *hba, u32 doorbell)
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scsi_dma_unmap(ccb->cmd);
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stex_scsi_done(ccb);
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hba->out_req_cnt--;
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} else if (ccb->req_type & PASSTHRU_REQ_TYPE) {
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hba->out_req_cnt--;
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if (ccb->req_type & PASSTHRU_REQ_NO_WAKEUP) {
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ccb->req_type = 0;
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continue;
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}
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} else
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ccb->req_type = 0;
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if (waitqueue_active(&hba->waitq))
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wake_up(&hba->waitq);
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}
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}
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update_status:
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@ -800,13 +777,14 @@ static int stex_handshake(struct st_hba *hba)
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data = readl(base + OMR1);
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if ((data & 0xffff0000) == MU_HANDSHAKE_SIGNATURE_HALF) {
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data &= 0x0000ffff;
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if (hba->host->can_queue > data)
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if (hba->host->can_queue > data) {
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hba->host->can_queue = data;
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hba->host->cmd_per_lun = data;
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}
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}
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h = (struct handshake_frame *)(hba->dma_mem + MU_REQ_BUFFER_SIZE);
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h->rb_phy = cpu_to_le32(hba->dma_handle);
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h->rb_phy_hi = cpu_to_le32((hba->dma_handle >> 16) >> 16);
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h = (struct handshake_frame *)hba->status_buffer;
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h->rb_phy = cpu_to_le64(hba->dma_handle);
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h->req_sz = cpu_to_le16(sizeof(struct req_msg));
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h->req_cnt = cpu_to_le16(MU_REQ_COUNT);
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h->status_sz = cpu_to_le16(sizeof(struct status_msg));
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@ -950,8 +928,8 @@ static void stex_hard_reset(struct st_hba *hba)
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static int stex_reset(struct scsi_cmnd *cmd)
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{
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struct st_hba *hba;
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unsigned long flags;
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unsigned long before;
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void __iomem *base;
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unsigned long flags, before;
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hba = (struct st_hba *) &cmd->device->host->hostdata[0];
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@ -994,7 +972,23 @@ static int stex_reset(struct scsi_cmnd *cmd)
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msleep(1);
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}
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base = hba->mmio_base;
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writel(0, base + IMR0);
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readl(base + IMR0);
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writel(0, base + OMR0);
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readl(base + OMR0);
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writel(0, base + IMR1);
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readl(base + IMR1);
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writel(0, base + OMR1);
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readl(base + OMR1); /* flush */
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spin_lock_irqsave(hba->host->host_lock, flags);
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hba->req_head = 0;
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hba->req_tail = 0;
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hba->status_head = 0;
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hba->status_tail = 0;
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hba->out_req_cnt = 0;
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hba->mu_status = MU_STATE_STARTED;
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spin_unlock_irqrestore(hba->host->host_lock, flags);
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return SUCCESS;
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}
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@ -1130,7 +1124,6 @@ stex_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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hba->host = host;
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hba->pdev = pdev;
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init_waitqueue_head(&hba->waitq);
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err = request_irq(pdev->irq, stex_intr, IRQF_SHARED, DRV_NAME, hba);
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if (err) {
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@ -1206,16 +1199,18 @@ static void stex_hba_stop(struct st_hba *hba)
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hba->ccb[tag].sg_count = 0;
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hba->ccb[tag].sense_bufflen = 0;
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hba->ccb[tag].sense_buffer = NULL;
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hba->ccb[tag].req_type |= PASSTHRU_REQ_TYPE;
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hba->ccb[tag].req_type = PASSTHRU_REQ_TYPE;
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stex_send_cmd(hba, req, tag);
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spin_unlock_irqrestore(hba->host->host_lock, flags);
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before = jiffies;
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while (hba->ccb[tag].req_type & PASSTHRU_REQ_TYPE) {
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if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ))
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if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ)) {
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hba->ccb[tag].req_type = 0;
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return;
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msleep(10);
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}
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msleep(1);
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}
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}
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