* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <linux/module.h>
+#include <linux/ctype.h>
#include <linux/init.h>
-#include <linux/smp_lock.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/mm.h>
+#include <linux/module.h>
#include <linux/workqueue.h>
-#include <asm/scatterlist.h>
-#include <asm/io.h>
+#include <linux/blkdev.h>
+#include <asm/semaphore.h>
#include <scsi/scsi.h>
#include "scsi_priv.h"
#include <scsi/scsi_device.h>
#define SPI_PRINTK(x, l, f, a...) dev_printk(l, &(x)->dev, f , ##a)
-#define SPI_NUM_ATTRS 10 /* increase this if you add attributes */
+#define SPI_NUM_ATTRS 13 /* increase this if you add attributes */
#define SPI_OTHER_ATTRS 1 /* Increase this if you add "always
* on" attributes */
#define SPI_HOST_ATTRS 1
#define SPI_MAX_ECHO_BUFFER_SIZE 4096
+#define DV_LOOPS 3
+#define DV_TIMEOUT (10*HZ)
+#define DV_RETRIES 3 /* should only need at most
+ * two cc/ua clears */
+
/* Private data accessors (keep these out of the header file) */
#define spi_dv_pending(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_pending)
#define spi_dv_sem(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_sem)
#define to_spi_internal(tmpl) container_of(tmpl, struct spi_internal, t)
-static const char *const ppr_to_ns[] = {
+static const int ppr_to_ps[] = {
/* The PPR values 0-6 are reserved, fill them in when
* the committee defines them */
- NULL, /* 0x00 */
- NULL, /* 0x01 */
- NULL, /* 0x02 */
- NULL, /* 0x03 */
- NULL, /* 0x04 */
- NULL, /* 0x05 */
- NULL, /* 0x06 */
- "3.125", /* 0x07 */
- "6.25", /* 0x08 */
- "12.5", /* 0x09 */
- "25", /* 0x0a */
- "30.3", /* 0x0b */
- "50", /* 0x0c */
+ -1, /* 0x00 */
+ -1, /* 0x01 */
+ -1, /* 0x02 */
+ -1, /* 0x03 */
+ -1, /* 0x04 */
+ -1, /* 0x05 */
+ -1, /* 0x06 */
+ 3125, /* 0x07 */
+ 6250, /* 0x08 */
+ 12500, /* 0x09 */
+ 25000, /* 0x0a */
+ 30300, /* 0x0b */
+ 50000, /* 0x0c */
};
/* The PPR values at which you calculate the period in ns by multiplying
* by 4 */
#define SPI_STATIC_PPR 0x0c
+static int sprint_frac(char *dest, int value, int denom)
+{
+ int frac = value % denom;
+ int result = sprintf(dest, "%d", value / denom);
+
+ if (frac == 0)
+ return result;
+ dest[result++] = '.';
+
+ do {
+ denom /= 10;
+ sprintf(dest + result, "%d", frac / denom);
+ result++;
+ frac %= denom;
+ } while (frac);
+
+ dest[result++] = '\0';
+ return result;
+}
+
+/* Modification of scsi_wait_req that will clear UNIT ATTENTION conditions
+ * resulting from (likely) bus and device resets */
+static void spi_wait_req(struct scsi_request *sreq, const void *cmd,
+ void *buffer, unsigned bufflen)
+{
+ int i;
+
+ for(i = 0; i < DV_RETRIES; i++) {
+ sreq->sr_request->flags |= REQ_FAILFAST;
+
+ scsi_wait_req(sreq, cmd, buffer, bufflen,
+ DV_TIMEOUT, /* retries */ 1);
+ if (sreq->sr_result & DRIVER_SENSE) {
+ struct scsi_sense_hdr sshdr;
+
+ if (scsi_request_normalize_sense(sreq, &sshdr)
+ && sshdr.sense_key == UNIT_ATTENTION)
+ continue;
+ }
+ break;
+ }
+}
+
static struct {
enum spi_signal_type value;
char *name;
return 0;
shost = dev_to_shost(dev);
- if (!shost->transportt || shost->transportt->host_attrs.class
+ if (!shost->transportt || shost->transportt->host_attrs.ac.class
!= &spi_host_class.class)
return 0;
i = to_spi_internal(shost->transportt);
- return &i->t.host_attrs == cont;
+ return &i->t.host_attrs.ac == cont;
}
static int spi_device_configure(struct device *dev)
struct scsi_target *starget = to_scsi_target(dev);
spi_period(starget) = -1; /* illegal value */
+ spi_min_period(starget) = 0;
spi_offset(starget) = 0; /* async */
+ spi_max_offset(starget) = 255;
spi_width(starget) = 0; /* narrow */
+ spi_max_width(starget) = 1;
spi_iu(starget) = 0; /* no IU */
spi_dt(starget) = 0; /* ST */
spi_qas(starget) = 0;
return 0;
}
+#define spi_transport_show_simple(field, format_string) \
+ \
+static ssize_t \
+show_spi_transport_##field(struct class_device *cdev, char *buf) \
+{ \
+ struct scsi_target *starget = transport_class_to_starget(cdev); \
+ struct spi_transport_attrs *tp; \
+ \
+ tp = (struct spi_transport_attrs *)&starget->starget_data; \
+ return snprintf(buf, 20, format_string, tp->field); \
+}
+
+#define spi_transport_store_simple(field, format_string) \
+ \
+static ssize_t \
+store_spi_transport_##field(struct class_device *cdev, const char *buf, \
+ size_t count) \
+{ \
+ int val; \
+ struct scsi_target *starget = transport_class_to_starget(cdev); \
+ struct spi_transport_attrs *tp; \
+ \
+ tp = (struct spi_transport_attrs *)&starget->starget_data; \
+ val = simple_strtoul(buf, NULL, 0); \
+ tp->field = val; \
+ return count; \
+}
+
#define spi_transport_show_function(field, format_string) \
\
static ssize_t \
struct spi_internal *i = to_spi_internal(shost->transportt); \
\
val = simple_strtoul(buf, NULL, 0); \
+ i->f->set_##field(starget, val); \
+ return count; \
+}
+
+#define spi_transport_store_max(field, format_string) \
+static ssize_t \
+store_spi_transport_##field(struct class_device *cdev, const char *buf, \
+ size_t count) \
+{ \
+ int val; \
+ struct scsi_target *starget = transport_class_to_starget(cdev); \
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
+ struct spi_internal *i = to_spi_internal(shost->transportt); \
+ struct spi_transport_attrs *tp \
+ = (struct spi_transport_attrs *)&starget->starget_data; \
+ \
+ val = simple_strtoul(buf, NULL, 0); \
+ if (val > tp->max_##field) \
+ val = tp->max_##field; \
i->f->set_##field(starget, val); \
return count; \
}
show_spi_transport_##field, \
store_spi_transport_##field);
+#define spi_transport_simple_attr(field, format_string) \
+ spi_transport_show_simple(field, format_string) \
+ spi_transport_store_simple(field, format_string) \
+static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \
+ show_spi_transport_##field, \
+ store_spi_transport_##field);
+
+#define spi_transport_max_attr(field, format_string) \
+ spi_transport_show_function(field, format_string) \
+ spi_transport_store_max(field, format_string) \
+ spi_transport_simple_attr(max_##field, format_string) \
+static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \
+ show_spi_transport_##field, \
+ store_spi_transport_##field);
+
/* The Parallel SCSI Tranport Attributes: */
-spi_transport_rd_attr(offset, "%d\n");
-spi_transport_rd_attr(width, "%d\n");
+spi_transport_max_attr(offset, "%d\n");
+spi_transport_max_attr(width, "%d\n");
spi_transport_rd_attr(iu, "%d\n");
spi_transport_rd_attr(dt, "%d\n");
spi_transport_rd_attr(qas, "%d\n");
/* Translate the period into ns according to the current spec
* for SDTR/PPR messages */
-static ssize_t show_spi_transport_period(struct class_device *cdev, char *buf)
-
+static ssize_t
+show_spi_transport_period_helper(struct class_device *cdev, char *buf,
+ int period)
{
- struct scsi_target *starget = transport_class_to_starget(cdev);
- struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
- struct spi_transport_attrs *tp;
- const char *str;
- struct spi_internal *i = to_spi_internal(shost->transportt);
+ int len, picosec;
+
+ if (period < 0 || period > 0xff) {
+ picosec = -1;
+ } else if (period <= SPI_STATIC_PPR) {
+ picosec = ppr_to_ps[period];
+ } else {
+ picosec = period * 4000;
+ }
- tp = (struct spi_transport_attrs *)&starget->starget_data;
+ if (picosec == -1) {
+ len = sprintf(buf, "reserved");
+ } else {
+ len = sprint_frac(buf, picosec, 1000);
+ }
- if (i->f->get_period)
- i->f->get_period(starget);
+ buf[len++] = '\n';
+ buf[len] = '\0';
+ return len;
+}
- switch(tp->period) {
+static ssize_t
+store_spi_transport_period_helper(struct class_device *cdev, const char *buf,
+ size_t count, int *periodp)
+{
+ int j, picosec, period = -1;
+ char *endp;
+
+ picosec = simple_strtoul(buf, &endp, 10) * 1000;
+ if (*endp == '.') {
+ int mult = 100;
+ do {
+ endp++;
+ if (!isdigit(*endp))
+ break;
+ picosec += (*endp - '0') * mult;
+ mult /= 10;
+ } while (mult > 0);
+ }
- case 0x07 ... SPI_STATIC_PPR:
- str = ppr_to_ns[tp->period];
- if(!str)
- str = "reserved";
+ for (j = 0; j <= SPI_STATIC_PPR; j++) {
+ if (ppr_to_ps[j] < picosec)
+ continue;
+ period = j;
break;
+ }
+ if (period == -1)
+ period = picosec / 4000;
- case (SPI_STATIC_PPR+1) ... 0xff:
- return sprintf(buf, "%d\n", tp->period * 4);
+ if (period > 0xff)
+ period = 0xff;
- default:
- str = "unknown";
- }
- return sprintf(buf, "%s\n", str);
+ *periodp = period;
+
+ return count;
+}
+
+static ssize_t
+show_spi_transport_period(struct class_device *cdev, char *buf)
+{
+ struct scsi_target *starget = transport_class_to_starget(cdev);
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct spi_internal *i = to_spi_internal(shost->transportt);
+ struct spi_transport_attrs *tp =
+ (struct spi_transport_attrs *)&starget->starget_data;
+
+ if (i->f->get_period)
+ i->f->get_period(starget);
+
+ return show_spi_transport_period_helper(cdev, buf, tp->period);
}
static ssize_t
struct scsi_target *starget = transport_class_to_starget(cdev);
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct spi_internal *i = to_spi_internal(shost->transportt);
- int j, period = -1;
+ struct spi_transport_attrs *tp =
+ (struct spi_transport_attrs *)&starget->starget_data;
+ int period, retval;
- for (j = 0; j < SPI_STATIC_PPR; j++) {
- int len;
+ retval = store_spi_transport_period_helper(cdev, buf, count, &period);
- if(ppr_to_ns[j] == NULL)
- continue;
+ if (period < tp->min_period)
+ period = tp->min_period;
- len = strlen(ppr_to_ns[j]);
+ i->f->set_period(starget, period);
- if(strncmp(ppr_to_ns[j], buf, len) != 0)
- continue;
+ return retval;
+}
- if(buf[len] != '\n')
- continue;
-
- period = j;
- break;
- }
+static CLASS_DEVICE_ATTR(period, S_IRUGO | S_IWUSR,
+ show_spi_transport_period,
+ store_spi_transport_period);
- if (period == -1) {
- int val = simple_strtoul(buf, NULL, 0);
+static ssize_t
+show_spi_transport_min_period(struct class_device *cdev, char *buf)
+{
+ struct scsi_target *starget = transport_class_to_starget(cdev);
+ struct spi_transport_attrs *tp =
+ (struct spi_transport_attrs *)&starget->starget_data;
+ return show_spi_transport_period_helper(cdev, buf, tp->min_period);
+}
- /* Should probably check limits here, but this
- * gets reasonably close to OK for most things */
- period = val/4;
- }
+static ssize_t
+store_spi_transport_min_period(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ struct scsi_target *starget = transport_class_to_starget(cdev);
+ struct spi_transport_attrs *tp =
+ (struct spi_transport_attrs *)&starget->starget_data;
- if (period > 0xff)
- period = 0xff;
+ return store_spi_transport_period_helper(cdev, buf, count,
+ &tp->min_period);
+}
- i->f->set_period(starget, period);
- return count;
-}
-
-static CLASS_DEVICE_ATTR(period, S_IRUGO | S_IWUSR,
- show_spi_transport_period,
- store_spi_transport_period);
+static CLASS_DEVICE_ATTR(min_period, S_IRUGO | S_IWUSR,
+ show_spi_transport_min_period,
+ store_spi_transport_min_period);
+
static ssize_t show_spi_host_signalling(struct class_device *cdev, char *buf)
{
if(i->f->set_##x) \
i->f->set_##x(sdev->sdev_target, y)
-#define DV_LOOPS 3
-#define DV_TIMEOUT (10*HZ)
-#define DV_RETRIES 3 /* should only need at most
- * two cc/ua clears */
-
enum spi_compare_returns {
SPI_COMPARE_SUCCESS,
SPI_COMPARE_FAILURE,
for (r = 0; r < retries; r++) {
sreq->sr_cmd_len = 0; /* wait_req to fill in */
sreq->sr_data_direction = DMA_TO_DEVICE;
- scsi_wait_req(sreq, spi_write_buffer, buffer, len,
- DV_TIMEOUT, DV_RETRIES);
+ spi_wait_req(sreq, spi_write_buffer, buffer, len);
if(sreq->sr_result || !scsi_device_online(sdev)) {
struct scsi_sense_hdr sshdr;
memset(ptr, 0, len);
sreq->sr_cmd_len = 0; /* wait_req to fill in */
sreq->sr_data_direction = DMA_FROM_DEVICE;
- scsi_wait_req(sreq, spi_read_buffer, ptr, len,
- DV_TIMEOUT, DV_RETRIES);
+ spi_wait_req(sreq, spi_read_buffer, ptr, len);
scsi_device_set_state(sdev, SDEV_QUIESCE);
if (memcmp(buffer, ptr, len) != 0)
memset(ptr, 0, len);
- scsi_wait_req(sreq, spi_inquiry, ptr, len,
- DV_TIMEOUT, DV_RETRIES);
+ spi_wait_req(sreq, spi_inquiry, ptr, len);
if(sreq->sr_result || !scsi_device_online(sdev)) {
scsi_device_set_state(sdev, SDEV_QUIESCE);
* (reservation conflict, device not ready, etc) just
* skip the write tests */
for (l = 0; ; l++) {
- scsi_wait_req(sreq, spi_test_unit_ready, NULL, 0,
- DV_TIMEOUT, DV_RETRIES);
+ spi_wait_req(sreq, spi_test_unit_ready, NULL, 0);
if(sreq->sr_result) {
if(l >= 3)
sreq->sr_cmd_len = 0;
sreq->sr_data_direction = DMA_FROM_DEVICE;
- scsi_wait_req(sreq, spi_read_buffer_descriptor, buffer, 4,
- DV_TIMEOUT, DV_RETRIES);
+ spi_wait_req(sreq, spi_read_buffer_descriptor, buffer, 4);
if (sreq->sr_result)
/* Device has no echo buffer */
{
struct spi_internal *i = to_spi_internal(sreq->sr_host->transportt);
struct scsi_device *sdev = sreq->sr_device;
+ struct scsi_target *starget = sdev->sdev_target;
int len = sdev->inquiry_len;
/* first set us up for narrow async */
DV_SET(offset, 0);
}
/* test width */
- if (i->f->set_width && sdev->wdtr) {
+ if (i->f->set_width && spi_max_width(starget) && sdev->wdtr) {
i->f->set_width(sdev->sdev_target, 1);
+ printk("WIDTH IS %d\n", spi_max_width(starget));
+
if (spi_dv_device_compare_inquiry(sreq, buffer,
buffer + len,
DV_LOOPS)
retry:
/* now set up to the maximum */
- DV_SET(offset, 255);
- DV_SET(period, 1);
+ DV_SET(offset, spi_max_offset(starget));
+ DV_SET(period, spi_min_period(starget));
if (len == 0) {
SPI_PRINTK(sdev->sdev_target, KERN_INFO, "Domain Validation skipping write tests\n");
}
EXPORT_SYMBOL(spi_schedule_dv_device);
+/**
+ * spi_display_xfer_agreement - Print the current target transfer agreement
+ * @starget: The target for which to display the agreement
+ *
+ * Each SPI port is required to maintain a transfer agreement for each
+ * other port on the bus. This function prints a one-line summary of
+ * the current agreement; more detailed information is available in sysfs.
+ */
+void spi_display_xfer_agreement(struct scsi_target *starget)
+{
+ struct spi_transport_attrs *tp;
+ tp = (struct spi_transport_attrs *)&starget->starget_data;
+
+ if (tp->offset > 0 && tp->period > 0) {
+ unsigned int picosec, kb100;
+ char *scsi = "FAST-?";
+ char tmp[8];
+
+ if (tp->period <= SPI_STATIC_PPR) {
+ picosec = ppr_to_ps[tp->period];
+ switch (tp->period) {
+ case 7: scsi = "FAST-320"; break;
+ case 8: scsi = "FAST-160"; break;
+ case 9: scsi = "FAST-80"; break;
+ case 10:
+ case 11: scsi = "FAST-40"; break;
+ case 12: scsi = "FAST-20"; break;
+ }
+ } else {
+ picosec = tp->period * 4000;
+ if (tp->period < 25)
+ scsi = "FAST-20";
+ else if (tp->period < 50)
+ scsi = "FAST-10";
+ else
+ scsi = "FAST-5";
+ }
+
+ kb100 = (10000000 + picosec / 2) / picosec;
+ if (tp->width)
+ kb100 *= 2;
+ sprint_frac(tmp, picosec, 1000);
+
+ dev_info(&starget->dev,
+ "%s %sSCSI %d.%d MB/s %s%s%s (%s ns, offset %d)\n",
+ scsi, tp->width ? "WIDE " : "", kb100/10, kb100 % 10,
+ tp->dt ? "DT" : "ST", tp->iu ? " IU" : "",
+ tp->qas ? " QAS" : "", tmp, tp->offset);
+ } else {
+ dev_info(&starget->dev, "%sasynchronous.\n",
+ tp->width ? "wide " : "");
+ }
+}
+EXPORT_SYMBOL(spi_display_xfer_agreement);
+
#define SETUP_ATTRIBUTE(field) \
i->private_attrs[count] = class_device_attr_##field; \
if (!i->f->set_##field) { \
if (i->f->show_##field) \
count++
+#define SETUP_RELATED_ATTRIBUTE(field, rel_field) \
+ i->private_attrs[count] = class_device_attr_##field; \
+ if (!i->f->set_##rel_field) { \
+ i->private_attrs[count].attr.mode = S_IRUGO; \
+ i->private_attrs[count].store = NULL; \
+ } \
+ i->attrs[count] = &i->private_attrs[count]; \
+ if (i->f->show_##rel_field) \
+ count++
+
#define SETUP_HOST_ATTRIBUTE(field) \
i->private_host_attrs[count] = class_device_attr_##field; \
if (!i->f->set_##field) { \
sdev = to_scsi_device(dev);
shost = sdev->host;
- if (!shost->transportt || shost->transportt->host_attrs.class
+ if (!shost->transportt || shost->transportt->host_attrs.ac.class
!= &spi_host_class.class)
return 0;
/* Note: this class has no device attributes, so it has
return 0;
shost = dev_to_shost(dev->parent);
- if (!shost->transportt || shost->transportt->host_attrs.class
+ if (!shost->transportt || shost->transportt->host_attrs.ac.class
!= &spi_host_class.class)
return 0;
i = to_spi_internal(shost->transportt);
- return &i->t.target_attrs == cont;
+ return &i->t.target_attrs.ac == cont;
}
static DECLARE_TRANSPORT_CLASS(spi_transport_class,
memset(i, 0, sizeof(struct spi_internal));
- i->t.target_attrs.class = &spi_transport_class.class;
- i->t.target_attrs.attrs = &i->attrs[0];
- i->t.target_attrs.match = spi_target_match;
- attribute_container_register(&i->t.target_attrs);
+ i->t.target_attrs.ac.class = &spi_transport_class.class;
+ i->t.target_attrs.ac.attrs = &i->attrs[0];
+ i->t.target_attrs.ac.match = spi_target_match;
+ transport_container_register(&i->t.target_attrs);
i->t.target_size = sizeof(struct spi_transport_attrs);
- i->t.host_attrs.class = &spi_host_class.class;
- i->t.host_attrs.attrs = &i->host_attrs[0];
- i->t.host_attrs.match = spi_host_match;
- attribute_container_register(&i->t.host_attrs);
+ i->t.host_attrs.ac.class = &spi_host_class.class;
+ i->t.host_attrs.ac.attrs = &i->host_attrs[0];
+ i->t.host_attrs.ac.match = spi_host_match;
+ transport_container_register(&i->t.host_attrs);
i->t.host_size = sizeof(struct spi_host_attrs);
i->f = ft;
SETUP_ATTRIBUTE(period);
+ SETUP_RELATED_ATTRIBUTE(min_period, period);
SETUP_ATTRIBUTE(offset);
+ SETUP_RELATED_ATTRIBUTE(max_offset, offset);
SETUP_ATTRIBUTE(width);
+ SETUP_RELATED_ATTRIBUTE(max_width, width);
SETUP_ATTRIBUTE(iu);
SETUP_ATTRIBUTE(dt);
SETUP_ATTRIBUTE(qas);
{
struct spi_internal *i = to_spi_internal(t);
- attribute_container_unregister(&i->t.target_attrs);
- attribute_container_unregister(&i->t.host_attrs);
+ transport_container_unregister(&i->t.target_attrs);
+ transport_container_unregister(&i->t.host_attrs);
kfree(i);
}
git://git.onelab.eu / linux-2.6.git / blobdiff