Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
drivers/scsi/NCR5380.c | 652 +++++++++++++++++++++++++------------------------
1 file changed, 333 insertions(+), 319 deletions(-)
diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c
index 45da3c8..c8aa935 100644
--- a/drivers/scsi/NCR5380.c
+++ b/drivers/scsi/NCR5380.c
@@ -1,4 +1,4 @@
-/*
+/*
* NCR 5380 generic driver routines. These should make it *trivial*
* to implement 5380 SCSI drivers under Linux with a non-trantor
* architecture.
@@ -6,14 +6,14 @@
* Note that these routines also work with NR53c400 family chips.
*
* Copyright 1993, Drew Eckhardt
- * Visionary Computing
+ * Visionary Computing
* (Unix and Linux consulting and custom programming)
* drew@xxxxxxxxxxxx
* +1 (303) 666-5836
*
- * DISTRIBUTION RELEASE 6.
+ * DISTRIBUTION RELEASE 6.
*
- * For more information, please consult
+ * For more information, please consult
*
* NCR 5380 Family
* SCSI Protocol Controller
@@ -29,10 +29,10 @@
/*
* Revision 1.10 1998/9/2 Alan Cox
* (alan@xxxxxxxxxxxxxxxxxxx)
- * Fixed up the timer lockups reported so far. Things still suck. Looking
+ * Fixed up the timer lockups reported so far. Things still suck. Looking
* forward to 2.3 and per device request queues. Then it'll be possible to
* SMP thread this beast and improve life no end.
-
+
* Revision 1.9 1997/7/27 Ronald van Cuijlenborg
* (ronald.van.cuijlenborg@xxxxxx or nutty@xxxxxx)
* (hopefully) fixed and enhanced USLEEP
@@ -69,27 +69,35 @@
*/
/*
- * Further development / testing that should be done :
+ * Further development / testing that should be done :
* 1. Cleanup the NCR5380_transfer_dma function and DMA operation complete
- * code so that everything does the same thing that's done at the
+ * code so that everything does the same thing that's done at the
* end of a pseudo-DMA read operation.
*
* 2. Fix REAL_DMA (interrupt driven, polled works fine) -
- * basically, transfer size needs to be reduced by one
+ * basically, transfer size needs to be reduced by one
* and the last byte read as is done with PSEUDO_DMA.
- *
- * 4. Test SCSI-II tagged queueing (I have no devices which support
+ *
+ * 4. Test SCSI-II tagged queueing (I have no devices which support
* tagged queueing)
*
- * 5. Test linked command handling code after Eric is ready with
+ * 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>
#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); }
-#define REMOVE(w,x,y,z) {printk("LINE:%d Removing: %p->%p %p->%p \n", __LINE__, (void*)(w), (void*)(x), (void*)(y), (void*)(z)); if ((x)==(y)) udelay(5); }
+#define LIST(x,y) { \
+ printk("LINE:%d Adding %p to %p\n", __LINE__, \
+ (void*)(x), (void*)(y)); \
+ if ((x)==(y)) udelay(5); \
+ }
+#define REMOVE(w,x,y,z) { \
+ printk("LINE:%d Removing: %p->%p %p->%p \n", __LINE__, \
+ (void*)(w), (void*)(x), (void*)(y), (void*)(z)); \
+ if ((x)==(y)) udelay(5); \
+}
#else
#define LIST(x,y)
#define REMOVE(w,x,y,z)
@@ -114,9 +122,9 @@
/*
* Design
*
- * This is a generic 5380 driver. To use it on a different platform,
+ * 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
+ * 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
@@ -125,33 +133,33 @@
* 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
+ * 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
- * unlimited number of commands may be queued, letting
- * more commands propagate from the higher driver levels giving higher
- * throughput. Note that both I_T_L and I_T_L_Q nexuses are supported,
- * allowing multiple commands to propagate all the way to a SCSI-II device
+ * and commands that are currently executing. This means that an
+ * unlimited number of commands may be queued, letting
+ * more commands propagate from the higher driver levels giving higher
+ * throughput. Note that both I_T_L and I_T_L_Q nexuses are supported,
+ * allowing multiple commands to propagate all the way to a SCSI-II device
* while a command is already executing.
*
*
- * Issues specific to the NCR5380 :
+ * Issues specific to the NCR5380 :
*
- * When used in a PIO or pseudo-dma mode, the NCR5380 is a braindead
- * piece of hardware that requires you to sit in a loop polling for
- * the REQ signal as long as you are connected. Some devices are
- * brain dead (ie, many TEXEL CD ROM drives) and won't disconnect
+ * When used in a PIO or pseudo-dma mode, the NCR5380 is a braindead
+ * piece of hardware that requires you to sit in a loop polling for
+ * the REQ signal as long as you are connected. Some devices are
+ * brain dead (ie, many TEXEL CD ROM drives) and won't disconnect
* while doing long seek operations.
- *
+ *
* The workaround for this is to keep track of devices that have
* disconnected. If the device hasn't disconnected, for commands that
- * should disconnect, we do something like
+ * should disconnect, we do something like
*
* while (!REQ is asserted) { sleep for N usecs; poll for M usecs }
- *
- * Some tweaking of N and M needs to be done. An algorithm based
+ *
+ * Some tweaking of N and M needs to be done. An algorithm based
* on "time to data" would give the best results as long as short time
- * to datas (ie, on the same track) were considered, however these
+ * to datas (ie, on the same track) were considered, however these
* broken devices are the exception rather than the rule and I'd rather
* spend my time optimizing for the normal case.
*
@@ -161,23 +169,23 @@
* 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.
+ * 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.
* if the target goes into MSG IN and sends a DISCONNECT message,
* the command structure is placed into the per instance disconnected
- * queue, and NCR5380_main tries to find more work. If the target is
+ * queue, and NCR5380_main tries to find more work. If the target is
* idle for too long, the system will try to sleep.
*
* If a command has disconnected, eventually an interrupt will trigger,
* calling NCR5380_intr() which will in turn call NCR5380_reselect
* to reestablish a nexus. This will run main if necessary.
*
- * On command termination, the done function will be called as
+ * On command termination, the done function will be called as
* appropriate.
*
- * SCSI pointers are maintained in the SCp field of SCSI command
+ * SCSI pointers are maintained in the SCp field of SCSI command
* structures, being initialized after the command is connected
* in NCR5380_select, and set as appropriate in NCR5380_information_transfer.
* Note that in violation of the standard, an implicit SAVE POINTERS operation
@@ -187,18 +195,18 @@
/*
* Using this file :
* This file a skeleton Linux SCSI driver for the NCR 5380 series
- * of chips. To use it, you write an architecture specific functions
+ * of chips. To use it, you write an architecture specific functions
* and macros and include this file in your driver.
*
- * These macros control options :
- * AUTOPROBE_IRQ - if defined, the NCR5380_probe_irq() function will be
+ * These macros control options :
+ * AUTOPROBE_IRQ - if defined, the NCR5380_probe_irq() function will be
* defined.
- *
+ *
* AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
- * for commands that return with a CHECK CONDITION status.
+ * for commands that return with a CHECK CONDITION status.
*
* DIFFERENTIAL - if defined, NCR53c81 chips will use external differential
- * transceivers.
+ * transceivers.
*
* DONT_USE_INTR - if defined, never use interrupts, even if we probe or
* override-configure an IRQ.
@@ -215,7 +223,7 @@
* REAL_DMA - if defined, REAL DMA is used during the data transfer phases.
*
* REAL_DMA_POLL - if defined, REAL DMA is used but the driver doesn't
- * rely on phase mismatch and EOP interrupts to determine end
+ * rely on phase mismatch and EOP interrupts to determine end
* of phase.
*
* UNSAFE - leave interrupts enabled during pseudo-DMA transfers. You
@@ -224,9 +232,9 @@
* then, you're going to be better off twiddling with transfersize
* in the high level code.
*
- * Defaults for these will be provided although the user may want to adjust
+ * Defaults for these will be provided although the user may want to adjust
* these to allocate CPU resources to the SCSI driver or "real" code.
- *
+ *
* USLEEP_SLEEP - amount of time, in jiffies, to sleep
*
* USLEEP_POLL - amount of time, in jiffies, to poll
@@ -237,21 +245,21 @@
*
* NCR5380_setup(instance) - initialize any local variables needed from a given
* instance of the host adapter for NCR5380_{read,write,pread,pwrite}
- *
+ *
* NCR5380_read(register) - read from the specified register
*
- * NCR5380_write(register, value) - write to the specific register
+ * NCR5380_write(register, value) - write to the specific register
*
- * NCR5380_implementation_fields - additional fields needed for this
+ * NCR5380_implementation_fields - additional fields needed for this
* specific implementation of the NCR5380
*
* Either real DMA *or* pseudo DMA may be implemented
- * REAL functions :
+ * REAL functions :
* NCR5380_REAL_DMA should be defined if real DMA is to be used.
- * Note that the DMA setup functions should return the number of bytes
+ * Note that the DMA setup functions should return the number of bytes
* that they were able to program the controller for.
*
- * Also note that generic i386/PC versions of these macros are
+ * Also note that generic i386/PC versions of these macros are
* available as NCR5380_i386_dma_write_setup,
* NCR5380_i386_dma_read_setup, and NCR5380_i386_dma_residual.
*
@@ -264,7 +272,7 @@
* NCR5380_pread(instance, dst, count);
*
* The generic driver is initialized by calling NCR5380_init(instance),
- * after setting the appropriate host specific fields and ID. If the
+ * 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.
*/
@@ -281,8 +289,8 @@ static void do_reset(struct Scsi_Host *host);
static __inline__ void initialize_SCp(Scsi_Cmnd * cmd)
{
- /*
- * Initialize the Scsi Pointer field so that all of the commands in the
+ /*
+ * Initialize the Scsi Pointer field so that all of the commands in the
* various queues are valid.
*/
@@ -312,14 +320,15 @@ static __inline__ void initialize_SCp(Scsi_Cmnd * cmd)
*
* Returns the value of the register or a negative error code.
*/
-
-static int NCR5380_poll_politely(struct Scsi_Host *instance, int reg, int bit, int val, int t)
+
+static int NCR5380_poll_politely(struct Scsi_Host *instance,
+ int reg, int bit, int val, int t)
{
NCR5380_local_declare();
int n = 500; /* At about 8uS a cycle for the cpu access */
unsigned long end = jiffies + t;
int r;
-
+
NCR5380_setup(instance);
while( n-- > 0)
@@ -329,7 +338,7 @@ static int NCR5380_poll_politely(struct Scsi_Host *instance, int reg, int bit, i
return 0;
cpu_relax();
}
-
+
/* t time yet ? */
while(time_before(jiffies, end))
{
@@ -348,12 +357,12 @@ static struct {
unsigned char value;
const char *name;
} phases[] __maybe_unused = {
- {PHASE_DATAOUT, "DATAOUT"},
- {PHASE_DATAIN, "DATAIN"},
- {PHASE_CMDOUT, "CMDOUT"},
- {PHASE_STATIN, "STATIN"},
- {PHASE_MSGOUT, "MSGOUT"},
- {PHASE_MSGIN, "MSGIN"},
+ {PHASE_DATAOUT, "DATAOUT"},
+ {PHASE_DATAIN, "DATAIN"},
+ {PHASE_CMDOUT, "CMDOUT"},
+ {PHASE_STATIN, "STATIN"},
+ {PHASE_MSGOUT, "MSGOUT"},
+ {PHASE_MSGIN, "MSGIN"},
{PHASE_UNKNOWN, "UNKNOWN"}
};
@@ -361,39 +370,39 @@ static struct {
static struct {
unsigned char mask;
const char *name;
-} signals[] = {
- {SR_DBP, "PARITY"},
- {SR_RST, "RST"},
- {SR_BSY, "BSY"},
- {SR_REQ, "REQ"},
- {SR_MSG, "MSG"},
- {SR_CD, "CD"},
- {SR_IO, "IO"},
- {SR_SEL, "SEL"},
+} signals[] = {
+ {SR_DBP, "PARITY"},
+ {SR_RST, "RST"},
+ {SR_BSY, "BSY"},
+ {SR_REQ, "REQ"},
+ {SR_MSG, "MSG"},
+ {SR_CD, "CD"},
+ {SR_IO, "IO"},
+ {SR_SEL, "SEL"},
{0, NULL}
-},
+},
basrs[] = {
- {BASR_ATN, "ATN"},
- {BASR_ACK, "ACK"},
+ {BASR_ATN, "ATN"},
+ {BASR_ACK, "ACK"},
{0, NULL}
-},
-icrs[] = {
- {ICR_ASSERT_RST, "ASSERT RST"},
- {ICR_ASSERT_ACK, "ASSERT ACK"},
- {ICR_ASSERT_BSY, "ASSERT BSY"},
- {ICR_ASSERT_SEL, "ASSERT SEL"},
- {ICR_ASSERT_ATN, "ASSERT ATN"},
- {ICR_ASSERT_DATA, "ASSERT DATA"},
+},
+icrs[] = {
+ {ICR_ASSERT_RST, "ASSERT RST"},
+ {ICR_ASSERT_ACK, "ASSERT ACK"},
+ {ICR_ASSERT_BSY, "ASSERT BSY"},
+ {ICR_ASSERT_SEL, "ASSERT SEL"},
+ {ICR_ASSERT_ATN, "ASSERT ATN"},
+ {ICR_ASSERT_DATA, "ASSERT DATA"},
{0, NULL}
-},
-mrs[] = {
- {MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"},
- {MR_TARGET, "MODE TARGET"},
- {MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"},
- {MR_ENABLE_PAR_INTR, "MODE PARITY INTR"},
- {MR_MONITOR_BSY, "MODE MONITOR BSY"},
- {MR_DMA_MODE, "MODE DMA"},
- {MR_ARBITRATE, "MODE ARBITRATION"},
+},
+mrs[] = {
+ {MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"},
+ {MR_TARGET, "MODE TARGET"},
+ {MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"},
+ {MR_ENABLE_PAR_INTR, "MODE PARITY INTR"},
+ {MR_MONITOR_BSY, "MODE MONITOR BSY"},
+ {MR_DMA_MODE, "MODE DMA"},
+ {MR_ARBITRATE, "MODE ARBITRATION"},
{0, NULL}
};
@@ -438,11 +447,11 @@ static void NCR5380_print(struct Scsi_Host *instance)
}
-/*
+/*
* NCR5380_print_phase - show SCSI phase
* @instance: adapter to dump
*
- * Print the current SCSI phase for debugging purposes
+ * Print the current SCSI phase for debugging purposes
*
* Locks: none
*/
@@ -456,16 +465,19 @@ static void NCR5380_print_phase(struct Scsi_Host *instance)
status = NCR5380_read(STATUS_REG);
if (!(status & SR_REQ))
- printk("scsi%d : REQ not asserted, phase unknown.\n", instance->host_no);
+ printk("scsi%d : REQ not asserted, phase unknown.\n",
+ instance->host_no);
else {
- for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i);
- printk("scsi%d : phase %s\n", instance->host_no, phases[i].name);
+ for (i = 0; (phases[i].value != PHASE_UNKNOWN) &&
+ (phases[i].value != (status & PHASE_MASK)); ++i);
+ printk("scsi%d : phase %s\n", instance->host_no,
+ phases[i].name);
}
}
#endif
/*
- * These need tweaking, and would probably work best as per-device
+ * These need tweaking, and would probably work best as per-device
* flags initialized differently for disk, tape, cd, etc devices.
* People with broken devices are free to experiment as to what gives
* the best results for them.
@@ -487,26 +499,26 @@ static void NCR5380_print_phase(struct Scsi_Host *instance)
#define USLEEP_WAITLONG USLEEP_SLEEP
#endif
-/*
+/*
* Function : int should_disconnect (unsigned char cmd)
*
- * Purpose : decide whether 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
*
- * Returns : DISCONNECT_LONG if we should disconnect for a really long
- * time (ie always, sleep, look for REQ active, sleep),
+ * Returns : DISCONNECT_LONG if we should disconnect for a really long
+ * time (ie always, sleep, look for REQ active, sleep),
* DISCONNECT_TIME_TO_DATA if we would only disconnect for a normal
* time-to-data delay, DISCONNECT_NONE if this command would return
* immediately.
*
- * Future sleep algorithms based on time to data can exploit
- * something like this so they can differentiate between "normal"
+ * Future sleep algorithms based on time to data can exploit
+ * something like this so they can differentiate between "normal"
* (ie, read, write, seek) and unusual commands (ie, * format).
*
* Note : We don't deal with commands that handle an immediate disconnect,
- *
+ *
*/
static int should_disconnect(unsigned char cmd)
@@ -529,7 +541,8 @@ static int should_disconnect(unsigned char cmd)
}
}
-static void NCR5380_set_timer(struct NCR5380_hostdata *hostdata, unsigned long timeout)
+static void NCR5380_set_timer(struct NCR5380_hostdata *hostdata,
+ unsigned long timeout)
{
hostdata->time_expires = jiffies + timeout;
schedule_delayed_work(&hostdata->coroutine, timeout);
@@ -547,7 +560,7 @@ static int probe_irq __initdata = 0;
* Set a flag to indicate the IRQ in question was received. This is
* used by the IRQ probe code.
*/
-
+
static irqreturn_t __init probe_intr(int irq, void *dev_id)
{
probe_irq = irq;
@@ -575,7 +588,8 @@ static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance,
NCR5380_setup(instance);
for (trying_irqs = i = 0, mask = 1; i < 16; ++i, mask <<= 1)
- if ((mask & possible) && (request_irq(i, &probe_intr, 0, "NCR-probe", NULL) == 0))
+ if ((mask & possible) && (request_irq(i, &probe_intr, 0,
+ "NCR-probe", NULL) == 0))
trying_irqs |= mask;
timeout = jiffies + (250 * HZ / 1000);
@@ -583,7 +597,7 @@ static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance,
/*
* A interrupt is triggered whenever BSY = false, SEL = true
- * and a bit set in the SELECT_ENABLE_REG is asserted on the
+ * and a bit set in the SELECT_ENABLE_REG is asserted on the
* SCSI bus.
*
* Note that the bus is only driven when the phase control signals
@@ -594,11 +608,12 @@ static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance,
NCR5380_write(TARGET_COMMAND_REG, 0);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask);
- NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_SEL);
+ NCR5380_write(INITIATOR_COMMAND_REG,
+ ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_SEL);
while (probe_irq == SCSI_IRQ_NONE && time_before(jiffies, timeout))
schedule_timeout_uninterruptible(1);
-
+
NCR5380_write(SELECT_ENABLE_REG, 0);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
@@ -613,7 +628,7 @@ static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance,
* NCR58380_print_options - show options
* @instance: unused for now
*
- * Called by probe code indicating the NCR5380 driver options that
+ * Called by probe code indicating the NCR5380 driver options that
* were selected. At some point this will switch to runtime options
* read from the adapter in question
*
@@ -649,7 +664,8 @@ NCR5380_print_options(struct Scsi_Host *instance)
" UNSAFE "
#endif
);
- printk(" USLEEP, USLEEP_POLL=%d USLEEP_SLEEP=%d", USLEEP_POLL, USLEEP_SLEEP);
+ printk(" USLEEP, USLEEP_POLL=%d USLEEP_SLEEP=%d",
+ USLEEP_POLL, USLEEP_SLEEP);
printk(" generic release=%d", NCR5380_PUBLIC_RELEASE);
if (((struct NCR5380_hostdata *) instance->hostdata)->flags & FLAG_NCR53C400) {
printk(" ncr53c400 release=%d", NCR53C400_PUBLIC_RELEASE);
@@ -657,10 +673,10 @@ NCR5380_print_options(struct Scsi_Host *instance)
}
/**
- * NCR5380_print_status - dump controller info
+ * NCR5380_print_status - dump controller info
* @instance: controller to dump
*
- * Print commands in the various queues, called from NCR5380_abort
+ * Print commands in the various queues, called from NCR5380_abort
* and NCR5380_debug to aid debugging.
*
* Locks: called functions disable irqs
@@ -791,11 +807,11 @@ static void lprint_opcode(int opcode, struct seq_file *m)
* with flags OR'd into the initial flags value.
*
* Notes : I assume that the host, hostno, and id bits have been
- * set correctly. I don't care about the irq and other fields.
+ * set correctly. I don't care about the irq and other fields.
*
* Returns 0 for success
*
- * Locks: interrupts must be enabled when we are called
+ * Locks: interrupts must be enabled when we are called
*/
static int NCR5380_init(struct Scsi_Host *instance, int flags)
@@ -807,8 +823,8 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags)
if(in_interrupt())
printk(KERN_ERR "NCR5380_init called with interrupts off!\n");
- /*
- * On NCR53C400 boards, NCR5380 registers are mapped 8 past
+ /*
+ * On NCR53C400 boards, NCR5380 registers are mapped 8 past
* the base address.
*/
@@ -833,9 +849,9 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags)
hostdata->connected = NULL;
hostdata->issue_queue = NULL;
hostdata->disconnected_queue = NULL;
-
+
INIT_DELAYED_WORK(&hostdata->coroutine, NCR5380_main);
-
+
#ifdef NCR5380_STATS
for (i = 0; i < 8; ++i) {
hostdata->time_read[i] = 0;
@@ -860,7 +876,7 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags)
#ifndef AUTOSENSE
if ((instance->cmd_per_lun > 1) || instance->can_queue > 1)
printk(KERN_WARNING "scsi%d : WARNING : support for multiple outstanding commands enabled\n" " without AUTOSENSE option, contingent allegiance conditions may\n"
- " be incorrectly cleared.\n", instance->host_no);
+ " be incorrectly cleared.\n", instance->host_no);
#endif /* def AUTOSENSE */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
@@ -874,16 +890,16 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags)
}
#endif
- /*
+ /*
* Detect and correct bus wedge problems.
*
- * If the system crashed, it may have crashed in a state
- * where a SCSI command was still executing, and the
+ * If the system crashed, it may have crashed in a state
+ * where a SCSI command was still executing, and the
* SCSI bus is not in a BUS FREE STATE.
*
* If this is the case, we'll try to abort the currently
* established nexus which we know nothing about, and that
- * failing, do a hard reset of the SCSI bus
+ * failing, do a hard reset of the SCSI bus
*/
for (pass = 1; (NCR5380_read(STATUS_REG) & SR_BSY) && pass <= 6; ++pass) {
@@ -924,12 +940,12 @@ static void NCR5380_exit(struct Scsi_Host *instance)
}
/**
- * NCR5380_queue_command - queue a command
+ * NCR5380_queue_command - queue a command
* @cmd: SCSI command
* @done: completion handler
*
- * cmd is added to the per instance issue_queue, with minor
- * twiddling done to the host specific fields of cmd. If the
+ * cmd is added to the per instance issue_queue, with minor
+ * twiddling done to the host specific fields of cmd. If the
* main coroutine is not running, it is restarted.
*
* Locks: host lock taken by caller
@@ -971,19 +987,19 @@ static int NCR5380_queue_command_lck(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *)
}
#endif
- /*
- * We use the host_scribble field as a pointer to the next command
- * in a queue
+ /*
+ * We use the host_scribble field as a pointer to the next command
+ * in a queue
*/
cmd->host_scribble = NULL;
cmd->scsi_done = done;
cmd->result = 0;
- /*
- * Insert the cmd into the issue queue. Note that REQUEST SENSE
+ /*
+ * Insert the cmd into the issue queue. Note that REQUEST SENSE
* commands are added to the head of the queue since any command will
- * clear the contingent allegiance condition that exists and the
+ * clear the contingent allegiance condition that exists and the
* sense data is only guaranteed to be valid while the condition exists.
*/
@@ -1009,11 +1025,11 @@ static DEF_SCSI_QCMD(NCR5380_queue_command)
/**
* NCR5380_main - NCR state machines
*
- * NCR5380_main is a coroutine that runs as long as more work can
- * be done on the NCR5380 host adapters in a system. Both
- * NCR5380_queue_command() and NCR5380_intr() will try to start it
+ * NCR5380_main is a coroutine that runs as long as more work can
+ * be done on the NCR5380 host adapters in a system. Both
+ * NCR5380_queue_command() and NCR5380_intr() will try to start it
* in case it is not running.
- *
+ *
* Locks: called as its own thread with no locks held. Takes the
* host lock and called routines may take the isa dma lock.
*/
@@ -1025,7 +1041,7 @@ static void NCR5380_main(struct work_struct *work)
struct Scsi_Host *instance = hostdata->host;
Scsi_Cmnd *tmp, *prev;
int done;
-
+
spin_lock_irq(instance->host_lock);
do {
/* Lock held here */
@@ -1036,7 +1052,7 @@ static void NCR5380_main(struct work_struct *work)
* Search through the issue_queue for a command destined
* for a target that's not busy.
*/
- for (tmp = (Scsi_Cmnd *) hostdata->issue_queue, prev = NULL; tmp; prev = tmp, tmp = (Scsi_Cmnd *) tmp->host_scribble)
+ for (tmp = (Scsi_Cmnd *) hostdata->issue_queue, prev = NULL; tmp; prev = tmp, tmp = (Scsi_Cmnd *) tmp->host_scribble)
{
if (prev != tmp)
dprintk(NDEBUG_LISTS, "MAIN tmp=%p target=%d busy=%d lun=%llu\n", tmp, tmp->device->id, hostdata->busy[tmp->device->id], tmp->device->lun);
@@ -1052,17 +1068,17 @@ static void NCR5380_main(struct work_struct *work)
}
tmp->host_scribble = NULL;
- /*
- * Attempt to establish an I_T_L nexus here.
+ /*
+ * Attempt to establish an I_T_L nexus here.
* On success, instance->hostdata->connected is set.
* On failure, we must add the command back to the
- * issue queue so we can keep trying.
+ * issue queue so we can keep trying.
*/
dprintk(NDEBUG_MAIN|NDEBUG_QUEUES, "scsi%d : main() : command for target %d lun %llu removed from issue_queue\n", instance->host_no, tmp->device->id, tmp->device->lun);
-
+
/*
- * A successful selection is defined as one that
- * leaves us with the command connected and
+ * A successful selection is defined as one that
+ * leaves us with the command connected and
* in hostdata->connected, OR has terminated the
* command.
*
@@ -1074,10 +1090,10 @@ static void NCR5380_main(struct work_struct *work)
/* RvC: have to preset this to indicate a new command is being performed */
if (!NCR5380_select(instance, tmp,
- /*
+ /*
* REQUEST SENSE commands are issued without tagged
- * queueing, even on SCSI-II devices because the
- * contingent allegiance condition exists for the
+ * queueing, even on SCSI-II devices because the
+ * contingent allegiance condition exists for the
* entire unit.
*/
(tmp->cmnd[0] == REQUEST_SENSE) ? TAG_NONE : TAG_NEXT)) {
@@ -1124,19 +1140,19 @@ static void NCR5380_main(struct work_struct *work)
} else
break;
} while (!done);
-
+
spin_unlock_irq(instance->host_lock);
}
#ifndef DONT_USE_INTR
/**
- * NCR5380_intr - generic NCR5380 irq handler
+ * NCR5380_intr - generic NCR5380 irq handler
* @irq: interrupt number
* @dev_id: device info
*
* Handle interrupts, reestablishing I_T_L or I_T_L_Q nexuses
- * from the disconnected queue, and restarting NCR5380_main()
+ * from the disconnected queue, and restarting NCR5380_main()
* as required.
*
* Locks: takes the needed instance locks
@@ -1194,7 +1210,7 @@ static irqreturn_t NCR5380_intr(int dummy, void *dev_id)
hostdata->dmalen = 0;
(void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
-
+
/* FIXME: we need to poll briefly then defer a workqueue task ! */
NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, BASR_ACK, 0, 2*HZ);
@@ -1214,17 +1230,16 @@ static irqreturn_t NCR5380_intr(int dummy, void *dev_id)
return IRQ_HANDLED;
}
-#endif
+#endif
/**
* collect_stats - collect stats on a scsi command
- * @hostdata: adapter
+ * @hostdata: adapter
* @cmd: command being issued
*
* Update the statistical data by parsing the command in question
*/
-
-static void collect_stats(struct NCR5380_hostdata *hostdata, Scsi_Cmnd * cmd)
+static void collect_stats(struct NCR5380_hostdata *hostdata, Scsi_Cmnd * cmd)
{
#ifdef NCR5380_STATS
switch (cmd->cmnd[0]) {
@@ -1245,40 +1260,39 @@ static void collect_stats(struct NCR5380_hostdata *hostdata, Scsi_Cmnd * cmd)
}
-/*
- * Function : int NCR5380_select (struct Scsi_Host *instance, Scsi_Cmnd *cmd,
+/*
+ * Function : int NCR5380_select (struct Scsi_Host *instance, Scsi_Cmnd *cmd,
* int tag);
*
* Purpose : establishes I_T_L or I_T_L_Q nexus for new or existing command,
- * including ARBITRATION, SELECTION, and initial message out for
- * IDENTIFY and queue messages.
+ * including ARBITRATION, SELECTION, and initial message out for
+ * IDENTIFY and queue messages.
*
- * Inputs : instance - instantiation of the 5380 driver on which this
- * target lives, cmd - SCSI command to execute, tag - set to TAG_NEXT for
- * new tag, TAG_NONE for untagged queueing, otherwise set to the tag for
+ * Inputs : instance - instantiation of the 5380 driver on which this
+ * target lives, cmd - SCSI command to execute, tag - set to TAG_NEXT for
+ * new tag, TAG_NONE for untagged queueing, otherwise set to the tag for
* the command that is presently connected.
- *
+ *
* Returns : -1 if selection could not execute for some reason,
- * 0 if selection succeeded or failed because the target
+ * 0 if selection succeeded or failed because the target
* did not respond.
*
- * Side effects :
- * If bus busy, arbitration failed, etc, NCR5380_select() will exit
+ * Side effects :
+ * If bus busy, arbitration failed, etc, NCR5380_select() will exit
* with registers as they should have been on entry - ie
* SELECT_ENABLE will be set appropriately, the NCR5380
* will cease to drive any SCSI bus signals.
*
- * If successful : I_T_L or I_T_L_Q nexus will be established,
- * instance->connected will be set to cmd.
+ * If successful : I_T_L or I_T_L_Q nexus will be established,
+ * instance->connected will be set to cmd.
* SELECT interrupt will be disabled.
*
- * If failed (no target) : cmd->scsi_done() will be called, and the
+ * If failed (no target) : cmd->scsi_done() will be called, and the
* cmd->result host byte set to DID_BAD_TARGET.
*
* Locks: caller holds hostdata lock in IRQ mode
*/
-
-static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag)
+static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag)
{
NCR5380_local_declare();
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
@@ -1298,14 +1312,14 @@ static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag)
NCR5380_dprint(NDEBUG_ARBITRATION, instance);
dprintk(NDEBUG_ARBITRATION, "scsi%d : starting arbitration, id = %d\n", instance->host_no, instance->this_id);
- /*
- * Set the phase bits to 0, otherwise the NCR5380 won't drive the
+ /*
+ * Set the phase bits to 0, otherwise the NCR5380 won't drive the
* data bus during SELECTION.
*/
NCR5380_write(TARGET_COMMAND_REG, 0);
- /*
+ /*
* Start arbitration.
*/
@@ -1327,8 +1341,8 @@ static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag)
dprintk(NDEBUG_ARBITRATION, "scsi%d : arbitration complete\n", instance->host_no);
- /*
- * The arbitration delay is 2.2us, but this is a minimum and there is
+ /*
+ * The arbitration delay is 2.2us, but this is a minimum and there is
* no maximum so we can safely sleep for ceil(2.2) usecs to accommodate
* the integral nature of udelay().
*
@@ -1355,8 +1369,8 @@ static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag)
dprintk(NDEBUG_ARBITRATION, "scsi%d : lost arbitration, deasserting ICR_ASSERT_SEL\n", instance->host_no);
goto failed;
}
- /*
- * Again, bus clear + bus settle time is 1.2us, however, this is
+ /*
+ * Again, bus clear + bus settle time is 1.2us, however, this is
* a minimum so we'll udelay ceil(1.2)
*/
@@ -1364,14 +1378,14 @@ static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag)
dprintk(NDEBUG_ARBITRATION, "scsi%d : won arbitration\n", instance->host_no);
- /*
- * Now that we have won arbitration, start Selection process, asserting
+ /*
+ * Now that we have won arbitration, start Selection process, asserting
* the host and target ID's on the SCSI bus.
*/
NCR5380_write(OUTPUT_DATA_REG, (hostdata->id_mask | (1 << scmd_id(cmd))));
- /*
+ /*
* Raise ATN while SEL is true before BSY goes false from arbitration,
* since this is the only way to guarantee that we'll get a MESSAGE OUT
* phase immediately after selection.
@@ -1380,14 +1394,14 @@ static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag)
NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_BSY | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL));
NCR5380_write(MODE_REG, MR_BASE);
- /*
+ /*
* Reselect interrupts must be turned off prior to the dropping of BSY,
* otherwise we will trigger an interrupt.
*/
NCR5380_write(SELECT_ENABLE_REG, 0);
/*
- * The initiator shall then wait at least two deskew delays and release
+ * The initiator shall then wait at least two deskew delays and release
* the BSY signal.
*/
udelay(1); /* wingel -- wait two bus deskew delay >2*45ns */
@@ -1395,17 +1409,17 @@ static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag)
/* Reset BSY */
NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL));
- /*
+ /*
* Something weird happens when we cease to drive BSY - looks
- * like the board/chip is letting us do another read before the
+ * like the board/chip is letting us do another read before the
* appropriate propagation delay has expired, and we're confusing
* a BSY signal from ourselves as the target's response to SELECTION.
*
* A small delay (the 'C++' frontend breaks the pipeline with an
* unnecessary jump, making it work on my 386-33/Trantor T128, the
- * tighter 'C' code breaks and requires this) solves the problem -
- * the 1 us delay is arbitrary, and only used because this delay will
- * be the same on other platforms and since it works here, it should
+ * tighter 'C' code breaks and requires this) solves the problem -
+ * the 1 us delay is arbitrary, and only used because this delay will
+ * be the same on other platforms and since it works here, it should
* work there.
*
* wingel suggests that this could be due to failing to wait
@@ -1416,15 +1430,15 @@ static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag)
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
+ /*
+ * The SCSI specification calls for a 250 ms timeout for the actual
* selection.
*/
timeout = jiffies + (250 * HZ / 1000);
- /*
- * XXX very interesting - we're seeing a bounce where the BSY we
+ /*
+ * XXX very interesting - we're seeing a bounce where the BSY we
* asserted is being reflected / still asserted (propagation delay?)
* and it's detecting as true. Sigh.
*/
@@ -1455,9 +1469,9 @@ part2:
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return -1;
}
- /*
- * No less than two deskew delays after the initiator detects the
- * BSY signal is true, it shall release the SEL signal and may
+ /*
+ * No less than two deskew delays after the initiator detects the
+ * BSY signal is true, it shall release the SEL signal and may
* change the DATA BUS. -wingel
*/
@@ -1486,11 +1500,11 @@ part2:
hostdata->targets_present |= (1 << scmd_id(cmd));
/*
- * Since we followed the SCSI spec, and raised ATN while SEL
+ * Since we followed the SCSI spec, and raised ATN while SEL
* was true but before BSY was false during selection, the information
* transfer phase should be a MESSAGE OUT phase so that we can send the
* IDENTIFY message.
- *
+ *
* If SCSI-II tagged queuing is enabled, we also send a SIMPLE_QUEUE_TAG
* message (2 bytes) with a tag ID that we increment with every command
* until it wraps back to 0.
@@ -1505,7 +1519,7 @@ part2:
spin_unlock_irq(instance->host_lock);
err = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
spin_lock_irq(instance->host_lock);
-
+
if(err) {
printk(KERN_ERR "scsi%d: timeout at NCR5380.c:%d\n", instance->host_no, __LINE__);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
@@ -1537,16 +1551,16 @@ failed:
}
-/*
- * Function : int NCR5380_transfer_pio (struct Scsi_Host *instance,
+/*
+ * Function : int NCR5380_transfer_pio (struct Scsi_Host *instance,
* unsigned char *phase, int *count, unsigned char **data)
*
* Purpose : transfers data in given phase using polled I/O
*
- * Inputs : instance - instance of driver, *phase - pointer to
- * what phase is expected, *count - pointer to number of
+ * Inputs : instance - instance of driver, *phase - pointer to
+ * what phase is expected, *count - pointer to number of
* bytes to transfer, **data - pointer to data pointer.
- *
+ *
* Returns : -1 when different phase is entered without transferring
* maximum number of bytes, 0 if all bytes or transferred or exit
* is in same phase.
@@ -1557,7 +1571,7 @@ failed:
*/
/*
- * Note : this code is not as quick as it could be, however it
+ * Note : this code is not as quick as it could be, however it
* IS 100% reliable, and for the actual data transfer where speed
* counts, we will always do a pseudo DMA or DMA transfer.
*/
@@ -1579,8 +1593,8 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
else
dprintk(NDEBUG_PIO, "scsi%d : pio read %d bytes\n", instance->host_no, c);
- /*
- * The NCR5380 chip will only drive the SCSI bus when the
+ /*
+ * The NCR5380 chip will only drive the SCSI bus when the
* phase specified in the appropriate bits of the TARGET COMMAND
* REGISTER match the STATUS REGISTER
*/
@@ -1594,9 +1608,9 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
break_allowed = 1;
}
do {
- /*
- * Wait for assertion of REQ, after which the phase bits will be
- * valid
+ /*
+ * Wait for assertion of REQ, after which the phase bits will be
+ * valid
*/
/* RvC: we simply poll once, after that we stop temporarily
@@ -1628,7 +1642,7 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
++d;
- /*
+ /*
* The SCSI standard suggests that in MSGOUT phase, the initiator
* should drop ATN on the last byte of the message phase
* after REQ has been asserted for the handshake but before
@@ -1655,11 +1669,11 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
dprintk(NDEBUG_HANDSHAKE, "scsi%d : req false, handshake complete\n", instance->host_no);
/*
- * We have several special cases to consider during REQ/ACK handshaking :
- * 1. We were in MSGOUT phase, and we are on the last byte of the
+ * We have several special cases to consider during REQ/ACK handshaking :
+ * 1. We were in MSGOUT phase, and we are on the last byte of the
* message. ATN must be dropped as ACK is dropped.
*
- * 2. We are in a MSGIN phase, and we are on the last byte of the
+ * 2. We are in a MSGIN phase, and we are on the last byte of the
* message. We must exit with ACK asserted, so that the calling
* code may raise ATN before dropping ACK to reject the message.
*
@@ -1698,7 +1712,7 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
*
* Locks: caller holds queue lock
*/
-
+
static void do_reset(struct Scsi_Host *host) {
NCR5380_local_declare();
NCR5380_setup(host);
@@ -1711,10 +1725,10 @@ static void do_reset(struct Scsi_Host *host) {
/*
* Function : do_abort (Scsi_Host *host)
- *
- * Purpose : abort the currently established nexus. Should only be
- * called from a routine which can drop into a
- *
+ *
+ * Purpose : abort the currently established nexus. Should only be
+ * called from a routine which can drop into a
+ *
* Returns : 0 on success, -1 on failure.
*
* Locks: queue lock held by caller
@@ -1732,23 +1746,23 @@ static int do_abort(struct Scsi_Host *host) {
/* Request message out phase */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
- /*
- * Wait for the target to indicate a valid phase by asserting
- * REQ. Once this happens, we'll have either a MSGOUT phase
- * and can immediately send the ABORT message, or we'll have some
+ /*
+ * Wait for the target to indicate a valid phase by asserting
+ * REQ. Once this happens, we'll have either a MSGOUT phase
+ * and can immediately send the ABORT message, or we'll have some
* other phase and will have to source/sink data.
- *
+ *
* We really don't care what value was on the bus or what value
* the target sees, so we just handshake.
*/
rc = NCR5380_poll_politely(host, STATUS_REG, SR_REQ, SR_REQ, 60 * HZ);
-
+
if(rc < 0)
return -1;
tmp = (unsigned char)rc;
-
+
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));
if ((tmp & PHASE_MASK) != PHASE_MSGOUT) {
@@ -1773,17 +1787,17 @@ static int do_abort(struct Scsi_Host *host) {
}
#if defined(REAL_DMA) || defined(PSEUDO_DMA) || defined (REAL_DMA_POLL)
-/*
- * Function : int NCR5380_transfer_dma (struct Scsi_Host *instance,
+/*
+ * Function : int NCR5380_transfer_dma (struct Scsi_Host *instance,
* unsigned char *phase, int *count, unsigned char **data)
*
* Purpose : transfers data in given phase using either real
* or pseudo DMA.
*
- * Inputs : instance - instance of driver, *phase - pointer to
- * what phase is expected, *count - pointer to number of
+ * Inputs : instance - instance of driver, *phase - pointer to
+ * what phase is expected, *count - pointer to number of
* bytes to transfer, **data - pointer to data pointer.
- *
+ *
* Returns : -1 when different phase is entered without transferring
* maximum number of bytes, 0 if all bytes or transferred or exit
* is in same phase.
@@ -1833,7 +1847,7 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
#else
/*
* Note : on my sample board, watch-dog timeouts occurred when interrupts
- * were not disabled for the duration of a single DMA transfer, from
+ * were not disabled for the duration of a single DMA transfer, from
* before the setting of DMA mode to after transfer of the last byte.
*/
@@ -1851,7 +1865,7 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
dprintk(NDEBUG_DMA, "scsi%d : mode reg = 0x%X\n", instance->host_no, NCR5380_read(MODE_REG));
- /*
+ /*
* On the PAS16 at least I/O recovery delays are not needed here.
* Everyone else seems to want them.
*/
@@ -1971,24 +1985,24 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
}
if (!(foo = NCR5380_pread(instance, d, c - diff))) {
/*
- * We can't disable DMA mode after successfully transferring
+ * We can't disable DMA mode after successfully transferring
* what we plan to be the last byte, since that would open up
- * a race condition where if the target asserted REQ before
+ * a race condition where if the target asserted REQ before
* we got the DMA mode reset, the NCR5380 would have latched
* an additional byte into the INPUT DATA register and we'd
* have dropped it.
- *
- * The workaround was to transfer one fewer bytes than we
- * intended to with the pseudo-DMA read function, wait for
+ *
+ * The workaround was to transfer one fewer bytes than we
+ * intended to with the pseudo-DMA read function, wait for
* the chip to latch the last byte, read it, and then disable
* pseudo-DMA mode.
- *
+ *
* After REQ is asserted, the NCR5380 asserts DRQ and ACK.
* REQ is deasserted when ACK is asserted, and not reasserted
* until ACK goes false. Since the NCR5380 won't lower ACK
* until DACK is asserted, which won't happen unless we twiddle
- * the DMA port or we take the NCR5380 out of DMA mode, we
- * can guarantee that we won't handshake another extra
+ * the DMA port or we take the NCR5380 out of DMA mode, we
+ * can guarantee that we won't handshake another extra
* byte.
*/
@@ -2008,8 +2022,8 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
dprintk(NDEBUG_C400_PWRITE, "About to pwrite %d bytes\n", c);
if (!(foo = NCR5380_pwrite(instance, d, c))) {
/*
- * Wait for the last byte to be sent. If REQ is being asserted for
- * the byte we're interested, we'll ACK it and it will go false.
+ * Wait for the last byte to be sent. If REQ is being asserted for
+ * the byte we're interested, we'll ACK it and it will go false.
*/
if (!(hostdata->flags & FLAG_HAS_LAST_BYTE_SENT)) {
timeout = 20000;
@@ -2059,17 +2073,17 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
/*
* Function : NCR5380_information_transfer (struct Scsi_Host *instance)
*
- * Purpose : run through the various SCSI phases and do as the target
- * directs us to. Operates on the currently connected command,
+ * Purpose : run through the various SCSI phases and do as the target
+ * directs us to. Operates on the currently connected command,
* instance->connected.
*
* Inputs : instance, instance for which we are doing commands
*
- * Side effects : SCSI things happen, the disconnected queue will be
+ * Side effects : SCSI things happen, the disconnected queue will be
* modified if a command disconnects, *instance->connected will
* change.
*
- * XXX Note : we need to watch for bus free or a reset condition here
+ * XXX Note : we need to watch for bus free or a reset condition here
* to recover from an unexpected bus free condition.
*
* Locks: io_request_lock held by caller in IRQ mode
@@ -2121,7 +2135,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
cmd->scsi_done(cmd);
return;
#endif
- /*
+ /*
* If there is no room left in the current buffer in the
* scatter-gather list, move onto the next one.
*/
@@ -2134,7 +2148,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
dprintk(NDEBUG_INFORMATION, "scsi%d : %d bytes and %d buffers left\n", instance->host_no, cmd->SCp.this_residual, cmd->SCp.buffers_residual);
}
/*
- * The preferred transfer method is going to be
+ * The preferred transfer method is going to be
* PSEUDO-DMA for systems that are strictly PIO,
* since we can let the hardware do the handshaking.
*
@@ -2197,13 +2211,13 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
switch (tmp) {
/*
- * Linking lets us reduce the time required to get the
+ * Linking lets us reduce the time required to get the
* next command out to the device, hopefully this will
* mean we don't waste another revolution due to the delays
* required by ARBITRATION and another SELECTION.
*
* In the current implementation proposal, low level drivers
- * merely have to start the next command, pointed to by
+ * merely have to start the next command, pointed to by
* next_link, done() is called as with unlinked commands.
*/
#ifdef LINKED
@@ -2212,7 +2226,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
dprintk(NDEBUG_LINKED, "scsi%d : target %d lun %llu linked command complete.\n", instance->host_no, cmd->device->id, cmd->device->lun);
- /*
+ /*
* Sanity check : A linked command should only terminate with
* one of these messages if there are more linked commands
* available.
@@ -2242,20 +2256,20 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
dprintk(NDEBUG_QUEUES, "scsi%d : command for target %d, lun %llu completed\n", instance->host_no, cmd->device->id, cmd->device->lun);
hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xFF));
- /*
- * I'm not sure what the correct thing to do here is :
- *
- * If the command that just executed is NOT a request
+ /*
+ * I'm not sure what the correct thing to do here is :
+ *
+ * If the command that just executed is NOT a request
* sense, the obvious thing to do is to set the result
* code to the values of the stored parameters.
- *
- * If it was a REQUEST SENSE command, we need some way
+ *
+ * If it was a REQUEST SENSE command, we need some way
* to differentiate between the failure code of the original
* and the failure code of the REQUEST sense - the obvious
* case is success, where we fall through and leave the result
* code unchanged.
- *
- * The non-obvious place is where the REQUEST SENSE failed
+ *
+ * The non-obvious place is where the REQUEST SENSE failed
*/
if (cmd->cmnd[0] != REQUEST_SENSE)
@@ -2288,8 +2302,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
}
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
- /*
- * Restore phase bits to 0 so an interrupted selection,
+ /*
+ * Restore phase bits to 0 so an interrupted selection,
* arbitration can resume.
*/
NCR5380_write(TARGET_COMMAND_REG, 0);
@@ -2320,8 +2334,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
hostdata->connected = NULL;
hostdata->disconnected_queue = cmd;
dprintk(NDEBUG_QUEUES, "scsi%d : command for target %d lun %llu was moved from connected to" " the disconnected_queue\n", instance->host_no, cmd->device->id, cmd->device->lun);
- /*
- * Restore phase bits to 0 so an interrupted selection,
+ /*
+ * Restore phase bits to 0 so an interrupted selection,
* arbitration can resume.
*/
NCR5380_write(TARGET_COMMAND_REG, 0);
@@ -2334,14 +2348,14 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
barrier();
return;
}
- /*
+ /*
* The SCSI data pointer is *IMPLICITLY* saved on a disconnect
- * operation, in violation of the SCSI spec so we can safely
+ * operation, in violation of the SCSI spec so we can safely
* ignore SAVE/RESTORE pointers calls.
*
- * Unfortunately, some disks violate the SCSI spec and
+ * Unfortunately, some disks violate the SCSI spec and
* don't issue the required SAVE_POINTERS message before
- * disconnecting, and we have to break spec to remain
+ * disconnecting, and we have to break spec to remain
* compatible.
*/
case SAVE_POINTERS:
@@ -2350,17 +2364,17 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
break;
case EXTENDED_MESSAGE:
-/*
+/*
* Extended messages are sent in the following format :
- * Byte
+ * Byte
* 0 EXTENDED_MESSAGE == 1
- * 1 length (includes one byte for code, doesn't
+ * 1 length (includes one byte for code, doesn't
* include first two bytes)
* 2 code
* 3..length+1 arguments
*
* Start the extended message buffer with the EXTENDED_MESSAGE
- * byte, since spi_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 */
@@ -2400,8 +2414,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
}
/* Fall through to reject message */
- /*
- * If we get something weird that we aren't expecting,
+ /*
+ * If we get something weird that we aren't expecting,
* reject it.
*/
default:
@@ -2440,10 +2454,10 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
case PHASE_CMDOUT:
len = cmd->cmd_len;
data = cmd->cmnd;
- /*
- * XXX for performance reasons, on machines with a
- * PSEUDO-DMA architecture we should probably
- * use the dma transfer function.
+ /*
+ * XXX for performance reasons, on machines with a
+ * PSEUDO-DMA architecture we should probably
+ * use the dma transfer function.
*/
NCR5380_transfer_pio(instance, &phase, &len, &data);
if (!cmd->device->disconnect && should_disconnect(cmd->cmnd[0])) {
@@ -2478,10 +2492,10 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
/*
* Function : void NCR5380_reselect (struct Scsi_Host *instance)
*
- * Purpose : does reselection, initializing the instance->connected
- * field to point to the Scsi_Cmnd for which the I_T_L or I_T_L_Q
+ * Purpose : does reselection, initializing the instance->connected
+ * field to point to the Scsi_Cmnd for which the I_T_L or I_T_L_Q
* nexus has been reestablished,
- *
+ *
* Inputs : instance - this instance of the NCR5380.
*
* Locks: io_request_lock held by caller if IRQ driven
@@ -2511,7 +2525,7 @@ static void NCR5380_reselect(struct Scsi_Host *instance) {
target_mask = NCR5380_read(CURRENT_SCSI_DATA_REG) & ~(hostdata->id_mask);
dprintk(NDEBUG_SELECTION, "scsi%d : reselect\n", instance->host_no);
- /*
+ /*
* At this point, we have detected that our SCSI ID is on the bus,
* SEL is true and BSY was false for at least one bus settle delay
* (400 ns).
@@ -2522,10 +2536,10 @@ static void NCR5380_reselect(struct Scsi_Host *instance) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_BSY);
- /* FIXME: timeout too long, must fail to workqueue */
+ /* FIXME: timeout too long, must fail to workqueue */
if(NCR5380_poll_politely(instance, STATUS_REG, SR_SEL, 0, 2*HZ)<0)
abort = 1;
-
+
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
/*
@@ -2550,14 +2564,14 @@ static void NCR5380_reselect(struct Scsi_Host *instance) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
lun = (msg[0] & 0x07);
- /*
+ /*
* We need to add code for SCSI-II to track which devices have
* I_T_L_Q nexuses established, and which have simple I_T_L
* nexuses so we can chose to do additional data transfer.
*/
- /*
- * Find the command corresponding to the I_T_L or I_T_L_Q nexus we
+ /*
+ * Find the command corresponding to the I_T_L or I_T_L_Q nexus we
* just reestablished, and remove it from the disconnected queue.
*/
@@ -2577,9 +2591,9 @@ static void NCR5380_reselect(struct Scsi_Host *instance) {
}
if (!tmp) {
printk(KERN_ERR "scsi%d : warning : target bitmask %02x lun %d not in disconnect_queue.\n", instance->host_no, target_mask, lun);
- /*
+ /*
* Since we have an established nexus that we can't do anything with,
- * we must abort it.
+ * we must abort it.
*/
abort = 1;
}
@@ -2597,7 +2611,7 @@ static void NCR5380_reselect(struct Scsi_Host *instance) {
* Function : void NCR5380_dma_complete (struct Scsi_Host *instance)
*
* Purpose : called by interrupt handler when DMA finishes or a phase
- * mismatch occurs (which would finish the DMA transfer).
+ * mismatch occurs (which would finish the DMA transfer).
*
* Inputs : instance - this instance of the NCR5380.
*
@@ -2617,7 +2631,7 @@ static void NCR5380_dma_complete(NCR5380_instance * instance) {
*
* Wait for final byte to transfer, ie wait for ACK to go false.
*
- * We should use the Last Byte Sent bit, unfortunately this is
+ * We should use the Last Byte Sent bit, unfortunately this is
* not available on the 5380/5381 (only the various CMOS chips)
*
* FIXME: timeout, and need to handle long timeout/irq case
@@ -2647,14 +2661,14 @@ static void NCR5380_dma_complete(NCR5380_instance * instance) {
*
* Purpose : abort a command
*
- * Inputs : cmd - the Scsi_Cmnd to abort, code - code to set the
- * host byte of the result field to, if zero DID_ABORTED is
+ * Inputs : cmd - the Scsi_Cmnd to abort, code - code to set the
+ * host byte of the result field to, if zero DID_ABORTED is
* used.
*
* Returns : 0 - success, -1 on failure.
*
- * XXX - there is no way to abort the command that is currently
- * connected, you have to wait for it to complete. If this is
+ * XXX - there is no way to abort the command that is currently
+ * connected, you have to wait for it to complete. If this is
* a problem, we could implement longjmp() / setjmp(), setjmp()
* called where the loop started in NCR5380_main().
*
@@ -2666,7 +2680,7 @@ static int NCR5380_abort(Scsi_Cmnd * cmd) {
struct Scsi_Host *instance = cmd->device->host;
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
Scsi_Cmnd *tmp, **prev;
-
+
printk(KERN_WARNING "scsi%d : aborting command\n", instance->host_no);
scsi_print_command(cmd);
@@ -2679,8 +2693,8 @@ static int NCR5380_abort(Scsi_Cmnd * cmd) {
#if 0
/*
- * Case 1 : If the command is the currently executing command,
- * we'll set the aborted flag and return control so that
+ * Case 1 : If the command is the currently executing command,
+ * we'll set the aborted flag and return control so that
* information transfer routine can exit cleanly.
*/
@@ -2693,13 +2707,13 @@ static int NCR5380_abort(Scsi_Cmnd * cmd) {
*/
NCR5380_write(INITIATOR_COMMAND_REG, ICR_ASSERT_ATN);
-/*
- * Since we can't change phases until we've completed the current
+/*
+ * Since we can't change phases until we've completed the current
* handshake, we have to source or sink a byte of data if the current
* phase is not MSGOUT.
*/
-/*
+/*
* Return control to the executing NCR drive so we can clear the
* aborted flag and get back into our main loop.
*/
@@ -2708,11 +2722,11 @@ static int NCR5380_abort(Scsi_Cmnd * cmd) {
}
#endif
-/*
- * Case 2 : If the command hasn't been issued yet, we simply remove it
+/*
+ * Case 2 : If the command hasn't been issued yet, we simply remove it
* from the issue queue.
*/
-
+
dprintk(NDEBUG_ABORT, "scsi%d : abort going into loop.\n", instance->host_no);
for (prev = (Scsi_Cmnd **) & (hostdata->issue_queue), tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp; prev = (Scsi_Cmnd **) & (tmp->host_scribble), tmp = (Scsi_Cmnd *) tmp->host_scribble)
if (cmd == tmp) {
@@ -2730,9 +2744,9 @@ static int NCR5380_abort(Scsi_Cmnd * cmd) {
printk(KERN_ERR "scsi%d : LOOP\n", instance->host_no);
#endif
-/*
+/*
* Case 3 : If any commands are connected, we're going to fail the abort
- * and let the high level SCSI driver retry at a later time or
+ * and let the high level SCSI driver retry at a later time or
* issue a reset.
*
* Timeouts, and therefore aborted commands, will be highly unlikely
@@ -2746,22 +2760,22 @@ static int NCR5380_abort(Scsi_Cmnd * cmd) {
return FAILED;
}
/*
- * Case 4: If the command is currently disconnected from the bus, and
- * there are no connected commands, we reconnect the I_T_L or
- * I_T_L_Q nexus associated with it, go into message out, and send
+ * Case 4: If the command is currently disconnected from the bus, and
+ * there are no connected commands, we reconnect the I_T_L or
+ * I_T_L_Q nexus associated with it, go into message out, and send
* an abort message.
*
* This case is especially ugly. In order to reestablish the nexus, we
- * need to call NCR5380_select(). The easiest way to implement this
+ * need to call NCR5380_select(). The easiest way to implement this
* function was to abort if the bus was busy, and let the interrupt
* handler triggered on the SEL for reselect take care of lost arbitrations
* where necessary, meaning interrupts need to be enabled.
*
- * When interrupts are enabled, the queues may change - so we
+ * When interrupts are enabled, the queues may change - so we
* can't remove it from the disconnected queue before selecting it
- * because that could cause a failure in hashing the nexus if that
+ * because that could cause a failure in hashing the nexus if that
* device reselected.
- *
+ *
* Since the queues may change, we can't use the pointers from when we
* first locate it.
*
@@ -2791,7 +2805,7 @@ static int NCR5380_abort(Scsi_Cmnd * cmd) {
}
}
/*
- * Case 5 : If we reached this point, the command was not found in any of
+ * Case 5 : If we reached this point, the command was not found in any of
* the queues.
*
* We probably reached this point because of an unlikely race condition
@@ -2805,9 +2819,9 @@ static int NCR5380_abort(Scsi_Cmnd * cmd) {
}
-/*
+/*
* Function : int NCR5380_bus_reset (Scsi_Cmnd *cmd)
- *
+ *
* Purpose : reset the SCSI bus.
*
* Returns : SUCCESS
--
1.8.5.2
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