[PATCH v4 40/50] scsi: sym53c500_cs: Move the SCSI pointer to private command data

Bart Van Assche
2022-02-16T21:04:51Z

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.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
drivers/scsi/pcmcia/sym53c500_cs.c | 47 ++++++++++++++++++------------
1 file changed, 29 insertions(+), 18 deletions(-)

diff --git a/drivers/scsi/pcmcia/sym53c500_cs.c b/drivers/scsi/pcmcia/sym53c500_cs.c
index fc93d2a57e1e..c4a838635893 100644
--- a/drivers/scsi/pcmcia/sym53c500_cs.c
+++ b/drivers/scsi/pcmcia/sym53c500_cs.c
@@ -192,6 +192,11 @@ struct sym53c500_data {
int fast_pio;
};

+static struct scsi_pointer *sym53c500_scsi_pointer(struct scsi_cmnd *cmd)
+{
+ return scsi_cmd_priv(cmd);
+}
+
enum Phase {
idle,
data_out,
@@ -351,6 +356,7 @@ SYM53C500_intr(int irq, void *dev_id)
struct sym53c500_data *data =
(struct sym53c500_data *)dev->hostdata;
struct scsi_cmnd *curSC = data->current_SC;
+ struct scsi_pointer *scsi_pointer = sym53c500_scsi_pointer(curSC);
int fast_pio = data->fast_pio;

spin_lock_irqsave(dev->host_lock, flags);
@@ -397,11 +403,12 @@ SYM53C500_intr(int irq, void *dev_id)

if (int_reg & 0x20) { /* Disconnect */
DEB(printk("SYM53C500: disconnect intr received\n"));
- if (curSC->SCp.phase != message_in) { /* Unexpected disconnect */
+ if (scsi_pointer->phase != message_in) { /* Unexpected disconnect */
curSC->result = DID_NO_CONNECT << 16;
} else { /* Command complete, return status and message */
- curSC->result = (curSC->SCp.Status & 0xff)
- | ((curSC->SCp.Message & 0xff) << 8) | (DID_OK << 16);
+ curSC->result = (scsi_pointer->Status & 0xff) |
+ ((scsi_pointer->Message & 0xff) << 8) |
+ (DID_OK << 16);
}
goto idle_out;
}
@@ -412,7 +419,7 @@ SYM53C500_intr(int irq, void *dev_id)
struct scatterlist *sg;
int i;

- curSC->SCp.phase = data_out;
+ scsi_pointer->phase = data_out;
VDEB(printk("SYM53C500: Data-Out phase\n"));
outb(FLUSH_FIFO, port_base + CMD_REG);
LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
@@ -431,7 +438,7 @@ SYM53C500_intr(int irq, void *dev_id)
struct scatterlist *sg;
int i;

- curSC->SCp.phase = data_in;
+ scsi_pointer->phase = data_in;
VDEB(printk("SYM53C500: Data-In phase\n"));
outb(FLUSH_FIFO, port_base + CMD_REG);
LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
@@ -446,12 +453,12 @@ SYM53C500_intr(int irq, void *dev_id)
break;

case 0x02: /* COMMAND */
- curSC->SCp.phase = command_ph;
+ scsi_pointer->phase = command_ph;
printk("SYM53C500: Warning: Unknown interrupt occurred in command phase!\n");
break;

case 0x03: /* STATUS */
- curSC->SCp.phase = status_ph;
+ scsi_pointer->phase = status_ph;
VDEB(printk("SYM53C500: Status phase\n"));
outb(FLUSH_FIFO, port_base + CMD_REG);
outb(INIT_CMD_COMPLETE, port_base + CMD_REG);
@@ -464,22 +471,24 @@ SYM53C500_intr(int irq, void *dev_id)

case 0x06: /* MESSAGE-OUT */
DEB(printk("SYM53C500: Message-Out phase\n"));
- curSC->SCp.phase = message_out;
+ scsi_pointer->phase = message_out;
outb(SET_ATN, port_base + CMD_REG); /* Reject the message */
outb(MSG_ACCEPT, port_base + CMD_REG);
break;

case 0x07: /* MESSAGE-IN */
VDEB(printk("SYM53C500: Message-In phase\n"));
- curSC->SCp.phase = message_in;
+ scsi_pointer->phase = message_in;

- curSC->SCp.Status = inb(port_base + SCSI_FIFO);
- curSC->SCp.Message = inb(port_base + SCSI_FIFO);
+ scsi_pointer->Status = inb(port_base + SCSI_FIFO);
+ scsi_pointer->Message = inb(port_base + SCSI_FIFO);

VDEB(printk("SCSI FIFO size=%d\n", inb(port_base + FIFO_FLAGS) & 0x1f));
- DEB(printk("Status = %02x Message = %02x\n", curSC->SCp.Status, curSC->SCp.Message));
+ DEB(printk("Status = %02x Message = %02x\n",
+ scsi_pointer->Status, scsi_pointer->Message));

- if (curSC->SCp.Message == SAVE_POINTERS || curSC->SCp.Message == DISCONNECT) {
+ if (scsi_pointer->Message == SAVE_POINTERS ||
+ scsi_pointer->Message == DISCONNECT) {
outb(SET_ATN, port_base + CMD_REG); /* Reject message */
DEB(printk("Discarding SAVE_POINTERS message\n"));
}
@@ -491,7 +500,7 @@ SYM53C500_intr(int irq, void *dev_id)
return IRQ_HANDLED;

idle_out:
- curSC->SCp.phase = idle;
+ scsi_pointer->phase = idle;
scsi_done(curSC);
goto out;
}
@@ -539,6 +548,7 @@ SYM53C500_info(struct Scsi_Host *SChost)

static int SYM53C500_queue_lck(struct scsi_cmnd *SCpnt)
{
+ struct scsi_pointer *scsi_pointer = sym53c500_scsi_pointer(SCpnt);
int i;
int port_base = SCpnt->device->host->io_port;
struct sym53c500_data *data =
@@ -555,9 +565,9 @@ static int SYM53C500_queue_lck(struct scsi_cmnd *SCpnt)
VDEB(printk("\n"));

data->current_SC = SCpnt;
- data->current_SC->SCp.phase = command_ph;
- data->current_SC->SCp.Status = 0;
- data->current_SC->SCp.Message = 0;
+ scsi_pointer->phase = command_ph;
+ scsi_pointer->Status = 0;
+ scsi_pointer->Message = 0;

/* We are locked here already by the mid layer */
REG0(port_base);
@@ -671,7 +681,8 @@ static struct scsi_host_template sym53c500_driver_template = {
.can_queue = 1,
.this_id = 7,
.sg_tablesize = 32,
- .shost_groups = SYM53C500_shost_groups
+ .shost_groups = SYM53C500_shost_groups,
+ .cmd_size = sizeof(struct scsi_pointer),
};

static int SYM53C500_config_check(struct pcmcia_device *p_dev, void *priv_data)