* 5. Test linked command handling code after Eric is ready with
* the high level code.
*/
+#include <scsi/scsi_dbg.h>
+#include <scsi/scsi_transport_spi.h>
+
+#ifndef NDEBUG
+#define NDEBUG 0
+#endif
+#ifndef NDEBUG_ABORT
+#define NDEBUG_ABORT 0
+#endif
#if (NDEBUG & NDEBUG_LISTS)
#define LIST(x,y) {printk("LINE:%d Adding %p to %p\n", __LINE__, (void*)(x), (void*)(y)); if ((x)==(y)) udelay(5); }
/*
* Design
- * Issues :
- *
- * The other Linux SCSI drivers were written when Linux was Intel PC-only,
- * and specifically for each board rather than each chip. This makes their
- * adaptation to platforms like the Mac (Some of which use NCR5380's)
- * more difficult than it has to be.
- *
- * Also, many of the SCSI drivers were written before the command queuing
- * routines were implemented, meaning their implementations of queued
- * commands were hacked on rather than designed in from the start.
- *
- * When I designed the Linux SCSI drivers I figured that
- * while having two different SCSI boards in a system might be useful
- * for debugging things, two of the same type wouldn't be used.
- * Well, I was wrong and a number of users have mailed me about running
- * multiple high-performance SCSI boards in a server.
*
- * Finally, when I get questions from users, I have no idea what
- * revision of my driver they are running.
- *
- * This driver attempts to address these problems :
* This is a generic 5380 driver. To use it on a different platform,
* one simply writes appropriate system specific macros (ie, data
* transfer - some PC's will use the I/O bus, 68K's must use
* memory mapped) and drops this file in their 'C' wrapper.
*
+ * (Note from hch: unfortunately it was not enough for the different
+ * m68k folks and instead of improving this driver they copied it
+ * and hacked it up for their needs. As a consequence they lost
+ * most updates to this driver. Maybe someone will fix all these
+ * drivers to use a common core one day..)
+ *
* As far as command queueing, two queues are maintained for
* each 5380 in the system - commands that haven't been issued yet,
* and commands that are currently executing. This means that an
* allowing multiple commands to propagate all the way to a SCSI-II device
* while a command is already executing.
*
- * To solve the multiple-boards-in-the-same-system problem,
- * there is a separate instance structure for each instance
- * of a 5380 in the system. So, multiple NCR5380 drivers will
- * be able to coexist with appropriate changes to the high level
- * SCSI code.
- *
- * A NCR5380_PUBLIC_REVISION macro is provided, with the release
- * number (updated for each public release) printed by the
- * NCR5380_print_options command, which should be called from the
- * wrapper detect function, so that I know what release of the driver
- * users are using.
*
* Issues specific to the NCR5380 :
*
* Architecture :
*
* At the heart of the design is a coroutine, NCR5380_main,
- * which is started when not running by the interrupt handler,
- * timer, and queue command function. It attempts to establish
- * I_T_L or I_T_L_Q nexuses by removing the commands from the
- * issue queue and calling NCR5380_select() if a nexus
- * is not established.
+ * which is started from a workqueue for each NCR5380 host in the
+ * system. It attempts to establish I_T_L or I_T_L_Q nexuses by
+ * removing the commands from the issue queue and calling
+ * NCR5380_select() if a nexus is not established.
*
* Once a nexus is established, the NCR5380_information_transfer()
* phase goes through the various phases as instructed by the target.
* NCR5380_pwrite(instance, src, count)
* NCR5380_pread(instance, dst, count);
*
- * If nothing specific to this implementation needs doing (ie, with external
- * hardware), you must also define
- *
- * NCR5380_queue_command
- * NCR5380_reset
- * NCR5380_abort
- * NCR5380_proc_info
- *
- * to be the global entry points into the specific driver, ie
- * #define NCR5380_queue_command t128_queue_command.
- *
- * If this is not done, the routines will be defined as static functions
- * with the NCR5380* names and the user must provide a globally
- * accessible wrapper function.
- *
* The generic driver is initialized by calling NCR5380_init(instance),
* after setting the appropriate host specific fields and ID. If the
* driver wishes to autoprobe for an IRQ line, the NCR5380_probe_irq(instance,
- * possible) function may be used. Before the specific driver initialization
- * code finishes, NCR5380_print_options should be called.
+ * possible) function may be used.
*/
+
static int do_abort(struct Scsi_Host *host);
static void do_reset(struct Scsi_Host *host);
*/
if (cmd->use_sg) {
- cmd->SCp.buffer = (struct scatterlist *) cmd->buffer;
+ cmd->SCp.buffer = (struct scatterlist *) cmd->request_buffer;
cmd->SCp.buffers_residual = cmd->use_sg - 1;
cmd->SCp.ptr = page_address(cmd->SCp.buffer->page)+
cmd->SCp.buffer->offset;
{PHASE_UNKNOWN, "UNKNOWN"}
};
-#ifdef NDEBUG
+#if NDEBUG
static struct {
unsigned char mask;
const char *name;
/*
* Function : int should_disconnect (unsigned char cmd)
*
- * Purpose : decide weather a command would normally disconnect or
+ * Purpose : decide whether a command would normally disconnect or
* not, since if it won't disconnect we should go to sleep.
*
* Input : cmd - opcode of SCSI command
static void NCR5380_set_timer(struct NCR5380_hostdata *hostdata, unsigned long timeout)
{
hostdata->time_expires = jiffies + timeout;
- schedule_delayed_work(&hostdata->coroutine, hostdata->time_expires);
+ schedule_delayed_work(&hostdata->coroutine, timeout);
}
* used by the IRQ probe code.
*/
-static irqreturn_t __init probe_intr(int irq, void *dev_id,
- struct pt_regs *regs)
+static irqreturn_t __init probe_intr(int irq, void *dev_id)
{
probe_irq = irq;
return IRQ_HANDLED;
NCR5380_setup(instance);
for (trying_irqs = i = 0, mask = 1; i < 16; ++i, mask <<= 1)
- if ((mask & possible) && (request_irq(i, &probe_intr, SA_INTERRUPT, "NCR-probe", NULL) == 0))
+ if ((mask & possible) && (request_irq(i, &probe_intr, IRQF_DISABLED, "NCR-probe", NULL) == 0))
trying_irqs |= mask;
timeout = jiffies + (250 * HZ / 1000);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_SEL);
while (probe_irq == SCSI_IRQ_NONE && time_before(jiffies, timeout))
- {
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(1);
- }
+ schedule_timeout_uninterruptible(1);
NCR5380_write(SELECT_ENABLE_REG, 0);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
static void NCR5380_print_status(struct Scsi_Host *instance)
{
- static char pr_bfr[512];
- char *start;
- int len;
-
NCR5380_dprint(NDEBUG_ANY, instance);
NCR5380_dprint_phase(NDEBUG_ANY, instance);
-
- len = NCR5380_proc_info(instance, pr_bfr, &start, 0, sizeof(pr_bfr), 0);
- pr_bfr[len] = 0;
- printk("\n%s\n", pr_bfr);
}
/******************************************/
hostdata->issue_queue = NULL;
hostdata->disconnected_queue = NULL;
- INIT_WORK(&hostdata->coroutine, NCR5380_main, hostdata);
+ INIT_DELAYED_WORK(&hostdata->coroutine, NCR5380_main);
#ifdef NCR5380_STATS
for (i = 0; i < 8; ++i) {
/* Run the coroutine if it isn't already running. */
/* Kick off command processing */
- schedule_work(&hostdata->coroutine);
+ schedule_delayed_work(&hostdata->coroutine, 0);
return 0;
}
* host lock and called routines may take the isa dma lock.
*/
-static void NCR5380_main(void *p)
+static void NCR5380_main(struct work_struct *work)
{
- struct NCR5380_hostdata *hostdata = p;
+ struct NCR5380_hostdata *hostdata =
+ container_of(work, struct NCR5380_hostdata, coroutine.work);
struct Scsi_Host *instance = hostdata->host;
Scsi_Cmnd *tmp, *prev;
int done;
* NCR5380_intr - generic NCR5380 irq handler
* @irq: interrupt number
* @dev_id: device info
- * @regs: registers (unused)
*
* Handle interrupts, reestablishing I_T_L or I_T_L_Q nexuses
* from the disconnected queue, and restarting NCR5380_main()
* Locks: takes the needed instance locks
*/
-static irqreturn_t NCR5380_intr(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t NCR5380_intr(int irq, void *dev_id)
{
NCR5380_local_declare();
struct Scsi_Host *instance = (struct Scsi_Host *)dev_id;
} /* if BASR_IRQ */
spin_unlock_irqrestore(instance->host_lock, flags);
if(!done)
- schedule_work(&hostdata->coroutine);
+ schedule_delayed_work(&hostdata->coroutine, 0);
} while (!done);
return IRQ_HANDLED;
}
case WRITE:
case WRITE_6:
case WRITE_10:
- hostdata->time_write[cmd->device->id] += (jiffies - hostdata->timebase);
+ hostdata->time_write[scmd_id(cmd)] += (jiffies - hostdata->timebase);
hostdata->pendingw--;
break;
case READ:
case READ_6:
case READ_10:
- hostdata->time_read[cmd->device->id] += (jiffies - hostdata->timebase);
+ hostdata->time_read[scmd_id(cmd)] += (jiffies - hostdata->timebase);
hostdata->pendingr--;
break;
}
* the host and target ID's on the SCSI bus.
*/
- NCR5380_write(OUTPUT_DATA_REG, (hostdata->id_mask | (1 << cmd->device->id)));
+ NCR5380_write(OUTPUT_DATA_REG, (hostdata->id_mask | (1 << scmd_id(cmd))));
/*
* Raise ATN while SEL is true before BSY goes false from arbitration,
udelay(1);
- dprintk(NDEBUG_SELECTION, ("scsi%d : selecting target %d\n", instance->host_no, cmd->device->id));
+ dprintk(NDEBUG_SELECTION, ("scsi%d : selecting target %d\n", instance->host_no, scmd_id(cmd)));
/*
* The SCSI specification calls for a 250 ms timeout for the actual
if (!(NCR5380_read(STATUS_REG) & SR_BSY)) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- if (hostdata->targets_present & (1 << cmd->device->id)) {
+ if (hostdata->targets_present & (1 << scmd_id(cmd))) {
printk(KERN_DEBUG "scsi%d : weirdness\n", instance->host_no);
if (hostdata->restart_select)
printk(KERN_DEBUG "\trestart select\n");
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return 0;
}
- hostdata->targets_present |= (1 << cmd->device->id);
+ hostdata->targets_present |= (1 << scmd_id(cmd));
/*
* Since we followed the SCSI spec, and raised ATN while SEL
* If the watchdog timer fires, all future accesses to this
* device will use the polled-IO.
*/
- printk("scsi%d : switching target %d lun %d to slow handshake\n", instance->host_no, cmd->device->id, cmd->device->lun);
+ scmd_printk(KERN_INFO, cmd,
+ "switching to slow handshake\n");
cmd->device->borken = 1;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
sink = 1;
* 3..length+1 arguments
*
* Start the extended message buffer with the EXTENDED_MESSAGE
- * byte, since print_msg() wants the whole thing.
+ * byte, since spi_print_msg() wants the whole thing.
*/
extended_msg[0] = EXTENDED_MESSAGE;
/* Accept first byte by clearing ACK */
default:
if (!tmp) {
printk("scsi%d: rejecting message ", instance->host_no);
- print_msg(extended_msg);
+ spi_print_msg(extended_msg);
printk("\n");
} else if (tmp != EXTENDED_MESSAGE)
- printk("scsi%d: rejecting unknown message %02x from target %d, lun %d\n", instance->host_no, tmp, cmd->device->id, cmd->device->lun);
+ scmd_printk(KERN_INFO, cmd,
+ "rejecting unknown message %02x\n",tmp);
else
- printk("scsi%d: rejecting unknown extended message code %02x, length %d from target %d, lun %d\n", instance->host_no, extended_msg[1], extended_msg[0], cmd->device->id, cmd->device->lun);
+ scmd_printk(KERN_INFO, cmd,
+ "rejecting unknown extended message code %02x, length %d\n", extended_msg[1], extended_msg[0]);
msgout = MESSAGE_REJECT;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
if (!(msg[0] & 0x80)) {
printk(KERN_ERR "scsi%d : expecting IDENTIFY message, got ", instance->host_no);
- print_msg(msg);
+ spi_print_msg(msg);
abort = 1;
} else {
/* Accept message by clearing ACK */
Scsi_Cmnd *tmp, **prev;
printk(KERN_WARNING "scsi%d : aborting command\n", instance->host_no);
- print_Scsi_Cmnd(cmd);
-
- NCR5380_print_status(instance);
-
- printk(KERN_WARNING "scsi%d : aborting command\n", instance->host_no);
- print_Scsi_Cmnd(cmd);
+ scsi_print_command(cmd);
NCR5380_print_status(instance);
* Locks: host lock taken by caller
*/
-static int NCR5380_bus_reset(Scsi_Cmnd * cmd) {
- NCR5380_local_declare();
- NCR5380_setup(cmd->device->host);
-
- NCR5380_print_status(cmd->device->host);
- do_reset(cmd->device->host);
- return SUCCESS;
-}
-
-/*
- * Function : int NCR5380_device_reset (Scsi_Cmnd *cmd)
- *
- * Purpose : reset a SCSI device
- *
- * Returns : FAILED
- *
- * Locks: io_request_lock held by caller
- */
+static int NCR5380_bus_reset(Scsi_Cmnd * cmd)
+{
+ struct Scsi_Host *instance = cmd->device->host;
-static int NCR5380_device_reset(Scsi_Cmnd * cmd) {
- return FAILED;
-}
+ NCR5380_local_declare();
+ NCR5380_setup(instance);
+ NCR5380_print_status(instance);
-/*
- * Function : int NCR5380_host_reset (Scsi_Cmnd *cmd)
- *
- * Purpose : reset a SCSI device
- *
- * Returns : FAILED
- *
- * Locks: io_request_lock held by caller
- */
+ spin_lock_irq(instance->host_lock);
+ do_reset(instance);
+ spin_unlock_irq(instance->host_lock);
-static int NCR5380_host_reset(Scsi_Cmnd * cmd) {
- return FAILED;
+ return SUCCESS;
}
git://git.onelab.eu / linux-2.6.git / blobdiff