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scsi: fdomain: Move the SCSI pointer to private command data
Set .cmd_size in the SCSI host template instead of using the SCSI pointer from struct scsi_cmnd. This patch prepares for removal of the SCSI pointer from struct scsi_cmnd. Link: https://lore.kernel.org/r/20220218195117.25689-21-bvanassche@acm.org Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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@ -115,6 +115,11 @@ struct fdomain {
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struct work_struct work;
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};
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static struct scsi_pointer *fdomain_scsi_pointer(struct scsi_cmnd *cmd)
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{
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return scsi_cmd_priv(cmd);
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}
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static inline void fdomain_make_bus_idle(struct fdomain *fd)
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{
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outb(0, fd->base + REG_BCTL);
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@ -263,20 +268,21 @@ static void fdomain_work(struct work_struct *work)
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struct Scsi_Host *sh = container_of((void *)fd, struct Scsi_Host,
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hostdata);
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struct scsi_cmnd *cmd = fd->cur_cmd;
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struct scsi_pointer *scsi_pointer = fdomain_scsi_pointer(cmd);
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unsigned long flags;
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int status;
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int done = 0;
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spin_lock_irqsave(sh->host_lock, flags);
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if (cmd->SCp.phase & in_arbitration) {
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if (scsi_pointer->phase & in_arbitration) {
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status = inb(fd->base + REG_ASTAT);
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if (!(status & ASTAT_ARB)) {
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set_host_byte(cmd, DID_BUS_BUSY);
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fdomain_finish_cmd(fd);
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goto out;
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}
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cmd->SCp.phase = in_selection;
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scsi_pointer->phase = in_selection;
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outb(ICTL_SEL | FIFO_COUNT, fd->base + REG_ICTL);
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outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL);
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@ -285,7 +291,7 @@ static void fdomain_work(struct work_struct *work)
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/* Stop arbitration and enable parity */
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outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
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goto out;
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} else if (cmd->SCp.phase & in_selection) {
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} else if (scsi_pointer->phase & in_selection) {
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status = inb(fd->base + REG_BSTAT);
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if (!(status & BSTAT_BSY)) {
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/* Try again, for slow devices */
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@ -297,75 +303,75 @@ static void fdomain_work(struct work_struct *work)
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/* Stop arbitration and enable parity */
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outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
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}
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cmd->SCp.phase = in_other;
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scsi_pointer->phase = in_other;
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outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT, fd->base + REG_ICTL);
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outb(BCTL_BUSEN, fd->base + REG_BCTL);
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goto out;
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}
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/* cur_cmd->SCp.phase == in_other: this is the body of the routine */
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/* fdomain_scsi_pointer(cur_cmd)->phase == in_other: this is the body of the routine */
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status = inb(fd->base + REG_BSTAT);
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if (status & BSTAT_REQ) {
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switch (status & (BSTAT_MSG | BSTAT_CMD | BSTAT_IO)) {
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case BSTAT_CMD: /* COMMAND OUT */
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outb(cmd->cmnd[cmd->SCp.sent_command++],
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outb(cmd->cmnd[scsi_pointer->sent_command++],
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fd->base + REG_SCSI_DATA);
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break;
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case 0: /* DATA OUT -- tmc18c50/tmc18c30 only */
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if (fd->chip != tmc1800 && !cmd->SCp.have_data_in) {
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cmd->SCp.have_data_in = -1;
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if (fd->chip != tmc1800 && !scsi_pointer->have_data_in) {
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scsi_pointer->have_data_in = -1;
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outb(ACTL_IRQEN | ACTL_FIFOWR | ACTL_FIFOEN |
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PARITY_MASK, fd->base + REG_ACTL);
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}
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break;
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case BSTAT_IO: /* DATA IN -- tmc18c50/tmc18c30 only */
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if (fd->chip != tmc1800 && !cmd->SCp.have_data_in) {
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cmd->SCp.have_data_in = 1;
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if (fd->chip != tmc1800 && !scsi_pointer->have_data_in) {
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scsi_pointer->have_data_in = 1;
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outb(ACTL_IRQEN | ACTL_FIFOEN | PARITY_MASK,
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fd->base + REG_ACTL);
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}
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break;
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case BSTAT_CMD | BSTAT_IO: /* STATUS IN */
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cmd->SCp.Status = inb(fd->base + REG_SCSI_DATA);
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scsi_pointer->Status = inb(fd->base + REG_SCSI_DATA);
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break;
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case BSTAT_MSG | BSTAT_CMD: /* MESSAGE OUT */
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outb(MESSAGE_REJECT, fd->base + REG_SCSI_DATA);
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break;
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case BSTAT_MSG | BSTAT_CMD | BSTAT_IO: /* MESSAGE IN */
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cmd->SCp.Message = inb(fd->base + REG_SCSI_DATA);
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if (cmd->SCp.Message == COMMAND_COMPLETE)
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scsi_pointer->Message = inb(fd->base + REG_SCSI_DATA);
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if (scsi_pointer->Message == COMMAND_COMPLETE)
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++done;
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break;
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}
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}
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if (fd->chip == tmc1800 && !cmd->SCp.have_data_in &&
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cmd->SCp.sent_command >= cmd->cmd_len) {
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if (fd->chip == tmc1800 && !scsi_pointer->have_data_in &&
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scsi_pointer->sent_command >= cmd->cmd_len) {
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if (cmd->sc_data_direction == DMA_TO_DEVICE) {
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cmd->SCp.have_data_in = -1;
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scsi_pointer->have_data_in = -1;
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outb(ACTL_IRQEN | ACTL_FIFOWR | ACTL_FIFOEN |
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PARITY_MASK, fd->base + REG_ACTL);
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} else {
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cmd->SCp.have_data_in = 1;
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scsi_pointer->have_data_in = 1;
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outb(ACTL_IRQEN | ACTL_FIFOEN | PARITY_MASK,
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fd->base + REG_ACTL);
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}
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}
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if (cmd->SCp.have_data_in == -1) /* DATA OUT */
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if (scsi_pointer->have_data_in == -1) /* DATA OUT */
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fdomain_write_data(cmd);
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if (cmd->SCp.have_data_in == 1) /* DATA IN */
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if (scsi_pointer->have_data_in == 1) /* DATA IN */
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fdomain_read_data(cmd);
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if (done) {
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set_status_byte(cmd, cmd->SCp.Status);
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set_status_byte(cmd, scsi_pointer->Status);
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set_host_byte(cmd, DID_OK);
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scsi_msg_to_host_byte(cmd, cmd->SCp.Message);
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scsi_msg_to_host_byte(cmd, scsi_pointer->Message);
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fdomain_finish_cmd(fd);
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} else {
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if (cmd->SCp.phase & disconnect) {
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if (scsi_pointer->phase & disconnect) {
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outb(ICTL_FIFO | ICTL_SEL | ICTL_REQ | FIFO_COUNT,
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fd->base + REG_ICTL);
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outb(0, fd->base + REG_BCTL);
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@ -398,14 +404,15 @@ static irqreturn_t fdomain_irq(int irq, void *dev_id)
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static int fdomain_queue(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
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{
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struct scsi_pointer *scsi_pointer = fdomain_scsi_pointer(cmd);
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struct fdomain *fd = shost_priv(cmd->device->host);
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unsigned long flags;
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cmd->SCp.Status = 0;
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cmd->SCp.Message = 0;
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cmd->SCp.have_data_in = 0;
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cmd->SCp.sent_command = 0;
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cmd->SCp.phase = in_arbitration;
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scsi_pointer->Status = 0;
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scsi_pointer->Message = 0;
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scsi_pointer->have_data_in = 0;
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scsi_pointer->sent_command = 0;
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scsi_pointer->phase = in_arbitration;
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scsi_set_resid(cmd, scsi_bufflen(cmd));
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spin_lock_irqsave(sh->host_lock, flags);
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@ -440,7 +447,7 @@ static int fdomain_abort(struct scsi_cmnd *cmd)
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spin_lock_irqsave(sh->host_lock, flags);
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fdomain_make_bus_idle(fd);
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fd->cur_cmd->SCp.phase |= aborted;
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fdomain_scsi_pointer(fd->cur_cmd)->phase |= aborted;
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/* Aborts are not done well. . . */
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set_host_byte(fd->cur_cmd, DID_ABORT);
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@ -501,6 +508,7 @@ static struct scsi_host_template fdomain_template = {
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.this_id = 7,
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.sg_tablesize = 64,
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.dma_boundary = PAGE_SIZE - 1,
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.cmd_size = sizeof(struct scsi_pointer),
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};
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struct Scsi_Host *fdomain_create(int base, int irq, int this_id,
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