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@@ -22,6 +22,7 @@
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#include <linux/init.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/module.h>
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#include <linux/workqueue.h>
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#include <linux/workqueue.h>
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+#include <linux/blkdev.h>
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#include <asm/semaphore.h>
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#include <asm/semaphore.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi.h>
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#include "scsi_priv.h"
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#include "scsi_priv.h"
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@@ -41,6 +42,11 @@
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#define SPI_MAX_ECHO_BUFFER_SIZE 4096
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#define SPI_MAX_ECHO_BUFFER_SIZE 4096
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+#define DV_LOOPS 3
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+#define DV_TIMEOUT (10*HZ)
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+#define DV_RETRIES 3 /* should only need at most
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+ * two cc/ua clears */
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+
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/* Private data accessors (keep these out of the header file) */
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/* Private data accessors (keep these out of the header file) */
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#define spi_dv_pending(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_pending)
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#define spi_dv_pending(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_pending)
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#define spi_dv_sem(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_sem)
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#define spi_dv_sem(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_sem)
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@@ -100,6 +106,29 @@ static int sprint_frac(char *dest, int value, int denom)
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return result;
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return result;
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}
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}
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+/* Modification of scsi_wait_req that will clear UNIT ATTENTION conditions
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+ * resulting from (likely) bus and device resets */
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+static void spi_wait_req(struct scsi_request *sreq, const void *cmd,
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+ void *buffer, unsigned bufflen)
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+{
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+ int i;
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+
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+ for(i = 0; i < DV_RETRIES; i++) {
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+ sreq->sr_request->flags |= REQ_FAILFAST;
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+
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+ scsi_wait_req(sreq, cmd, buffer, bufflen,
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+ DV_TIMEOUT, /* retries */ 1);
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+ if (sreq->sr_result & DRIVER_SENSE) {
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+ struct scsi_sense_hdr sshdr;
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+
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+ if (scsi_request_normalize_sense(sreq, &sshdr)
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+ && sshdr.sense_key == UNIT_ATTENTION)
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+ continue;
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+ }
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+ break;
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+ }
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+}
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+
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static struct {
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static struct {
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enum spi_signal_type value;
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enum spi_signal_type value;
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char *name;
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char *name;
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@@ -378,11 +407,6 @@ static CLASS_DEVICE_ATTR(signalling, S_IRUGO | S_IWUSR,
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if(i->f->set_##x) \
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if(i->f->set_##x) \
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i->f->set_##x(sdev->sdev_target, y)
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i->f->set_##x(sdev->sdev_target, y)
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-#define DV_LOOPS 3
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-#define DV_TIMEOUT (10*HZ)
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-#define DV_RETRIES 3 /* should only need at most
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- * two cc/ua clears */
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-
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enum spi_compare_returns {
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enum spi_compare_returns {
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SPI_COMPARE_SUCCESS,
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SPI_COMPARE_SUCCESS,
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SPI_COMPARE_FAILURE,
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SPI_COMPARE_FAILURE,
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@@ -446,8 +470,7 @@ spi_dv_device_echo_buffer(struct scsi_request *sreq, u8 *buffer,
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for (r = 0; r < retries; r++) {
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for (r = 0; r < retries; r++) {
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sreq->sr_cmd_len = 0; /* wait_req to fill in */
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sreq->sr_cmd_len = 0; /* wait_req to fill in */
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sreq->sr_data_direction = DMA_TO_DEVICE;
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sreq->sr_data_direction = DMA_TO_DEVICE;
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- scsi_wait_req(sreq, spi_write_buffer, buffer, len,
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- DV_TIMEOUT, DV_RETRIES);
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+ spi_wait_req(sreq, spi_write_buffer, buffer, len);
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if(sreq->sr_result || !scsi_device_online(sdev)) {
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if(sreq->sr_result || !scsi_device_online(sdev)) {
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struct scsi_sense_hdr sshdr;
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struct scsi_sense_hdr sshdr;
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@@ -471,8 +494,7 @@ spi_dv_device_echo_buffer(struct scsi_request *sreq, u8 *buffer,
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memset(ptr, 0, len);
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memset(ptr, 0, len);
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sreq->sr_cmd_len = 0; /* wait_req to fill in */
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sreq->sr_cmd_len = 0; /* wait_req to fill in */
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sreq->sr_data_direction = DMA_FROM_DEVICE;
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sreq->sr_data_direction = DMA_FROM_DEVICE;
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- scsi_wait_req(sreq, spi_read_buffer, ptr, len,
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- DV_TIMEOUT, DV_RETRIES);
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+ spi_wait_req(sreq, spi_read_buffer, ptr, len);
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scsi_device_set_state(sdev, SDEV_QUIESCE);
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scsi_device_set_state(sdev, SDEV_QUIESCE);
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if (memcmp(buffer, ptr, len) != 0)
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if (memcmp(buffer, ptr, len) != 0)
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@@ -500,8 +522,7 @@ spi_dv_device_compare_inquiry(struct scsi_request *sreq, u8 *buffer,
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memset(ptr, 0, len);
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memset(ptr, 0, len);
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- scsi_wait_req(sreq, spi_inquiry, ptr, len,
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- DV_TIMEOUT, DV_RETRIES);
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+ spi_wait_req(sreq, spi_inquiry, ptr, len);
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if(sreq->sr_result || !scsi_device_online(sdev)) {
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if(sreq->sr_result || !scsi_device_online(sdev)) {
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scsi_device_set_state(sdev, SDEV_QUIESCE);
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scsi_device_set_state(sdev, SDEV_QUIESCE);
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@@ -593,8 +614,7 @@ spi_dv_device_get_echo_buffer(struct scsi_request *sreq, u8 *buffer)
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* (reservation conflict, device not ready, etc) just
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* (reservation conflict, device not ready, etc) just
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* skip the write tests */
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* skip the write tests */
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for (l = 0; ; l++) {
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for (l = 0; ; l++) {
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- scsi_wait_req(sreq, spi_test_unit_ready, NULL, 0,
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- DV_TIMEOUT, DV_RETRIES);
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+ spi_wait_req(sreq, spi_test_unit_ready, NULL, 0);
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if(sreq->sr_result) {
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if(sreq->sr_result) {
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if(l >= 3)
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if(l >= 3)
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@@ -608,8 +628,7 @@ spi_dv_device_get_echo_buffer(struct scsi_request *sreq, u8 *buffer)
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sreq->sr_cmd_len = 0;
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sreq->sr_cmd_len = 0;
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sreq->sr_data_direction = DMA_FROM_DEVICE;
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sreq->sr_data_direction = DMA_FROM_DEVICE;
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- scsi_wait_req(sreq, spi_read_buffer_descriptor, buffer, 4,
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- DV_TIMEOUT, DV_RETRIES);
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+ spi_wait_req(sreq, spi_read_buffer_descriptor, buffer, 4);
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if (sreq->sr_result)
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if (sreq->sr_result)
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/* Device has no echo buffer */
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/* Device has no echo buffer */
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