mirror of https://gitee.com/openkylin/linux.git
[SCSI] convert SPI transport class to scsi_execute
This one's slightly more difficult. The transport class uses REQ_FAILFAST, so another interface (scsi_execute) had to be invented to take the extra flag. Also, the sense functions are shifted around to allow spi_execute to place data directly into a struct scsi_sense_hdr. With this change, there's probably a lot of unnecessary sense buffer allocation going on which we can fix later. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Bottomley
parent
1cf72699c1
commit
33aa687db9
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@ -1847,12 +1847,16 @@ EXPORT_SYMBOL(scsi_reset_provider);
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int scsi_normalize_sense(const u8 *sense_buffer, int sb_len,
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struct scsi_sense_hdr *sshdr)
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{
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if (!sense_buffer || !sb_len || (sense_buffer[0] & 0x70) != 0x70)
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if (!sense_buffer || !sb_len)
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return 0;
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memset(sshdr, 0, sizeof(struct scsi_sense_hdr));
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sshdr->response_code = (sense_buffer[0] & 0x7f);
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if (!scsi_sense_valid(sshdr))
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return 0;
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if (sshdr->response_code >= 0x72) {
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/*
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* descriptor format
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@ -282,7 +282,7 @@ void scsi_wait_req(struct scsi_request *sreq, const void *cmnd, void *buffer,
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EXPORT_SYMBOL(scsi_wait_req);
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/**
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* scsi_execute_req - insert request and wait for the result
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* scsi_execute - insert request and wait for the result
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* @sdev: scsi device
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* @cmd: scsi command
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* @data_direction: data direction
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@ -291,13 +291,14 @@ EXPORT_SYMBOL(scsi_wait_req);
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* @sense: optional sense buffer
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* @timeout: request timeout in seconds
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* @retries: number of times to retry request
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* @flags: or into request flags;
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*
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* scsi_execute_req returns the req->errors value which is the
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* the scsi_cmnd result field.
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**/
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int scsi_execute_req(struct scsi_device *sdev, unsigned char *cmd,
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int data_direction, void *buffer, unsigned bufflen,
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unsigned char *sense, int timeout, int retries)
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int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
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int data_direction, void *buffer, unsigned bufflen,
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unsigned char *sense, int timeout, int retries, int flags)
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{
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struct request *req;
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int write = (data_direction == DMA_TO_DEVICE);
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@ -314,7 +315,7 @@ int scsi_execute_req(struct scsi_device *sdev, unsigned char *cmd,
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req->sense = sense;
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req->sense_len = 0;
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req->timeout = timeout;
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req->flags |= REQ_BLOCK_PC | REQ_SPECIAL;
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req->flags |= flags | REQ_BLOCK_PC | REQ_SPECIAL;
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/*
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* head injection *required* here otherwise quiesce won't work
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@ -328,7 +329,7 @@ int scsi_execute_req(struct scsi_device *sdev, unsigned char *cmd,
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return ret;
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}
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EXPORT_SYMBOL(scsi_execute_req);
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EXPORT_SYMBOL(scsi_execute);
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/*
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* Function: scsi_init_cmd_errh()
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@ -28,7 +28,7 @@
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#include "scsi_priv.h"
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_request.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_spi.h>
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@ -108,25 +108,33 @@ static int sprint_frac(char *dest, int value, int denom)
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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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static int spi_execute(struct scsi_device *sdev, const void *cmd,
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enum dma_data_direction dir,
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void *buffer, unsigned bufflen,
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struct scsi_sense_hdr *sshdr)
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{
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int i;
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int i, result;
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unsigned char sense[SCSI_SENSE_BUFFERSIZE];
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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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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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/* FIXME: need to set REQ_FAILFAST */
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result = scsi_execute(sdev, cmd, dir, buffer, bufflen,
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sense, DV_TIMEOUT, /* retries */ 1,
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REQ_FAILFAST);
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if (result & DRIVER_SENSE) {
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struct scsi_sense_hdr sshdr_tmp;
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if (!sshdr)
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sshdr = &sshdr_tmp;
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if (scsi_request_normalize_sense(sreq, &sshdr)
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&& sshdr.sense_key == UNIT_ATTENTION)
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if (scsi_normalize_sense(sense, sizeof(*sense),
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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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return result;
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}
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static struct {
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@ -546,13 +554,13 @@ enum spi_compare_returns {
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/* This is for read/write Domain Validation: If the device supports
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* an echo buffer, we do read/write tests to it */
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static enum spi_compare_returns
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spi_dv_device_echo_buffer(struct scsi_request *sreq, u8 *buffer,
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spi_dv_device_echo_buffer(struct scsi_device *sdev, u8 *buffer,
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u8 *ptr, const int retries)
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{
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struct scsi_device *sdev = sreq->sr_device;
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int len = ptr - buffer;
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int j, k, r;
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int j, k, r, result;
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unsigned int pattern = 0x0000ffff;
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struct scsi_sense_hdr sshdr;
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const char spi_write_buffer[] = {
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WRITE_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0
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@ -597,14 +605,12 @@ spi_dv_device_echo_buffer(struct scsi_request *sreq, u8 *buffer,
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}
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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_data_direction = DMA_TO_DEVICE;
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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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struct scsi_sense_hdr sshdr;
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result = spi_execute(sdev, spi_write_buffer, DMA_TO_DEVICE,
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buffer, len, &sshdr);
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if(result || !scsi_device_online(sdev)) {
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scsi_device_set_state(sdev, SDEV_QUIESCE);
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if (scsi_request_normalize_sense(sreq, &sshdr)
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if (scsi_sense_valid(&sshdr)
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&& sshdr.sense_key == ILLEGAL_REQUEST
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/* INVALID FIELD IN CDB */
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&& sshdr.asc == 0x24 && sshdr.ascq == 0x00)
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@ -616,14 +622,13 @@ spi_dv_device_echo_buffer(struct scsi_request *sreq, u8 *buffer,
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return SPI_COMPARE_SKIP_TEST;
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SPI_PRINTK(sdev->sdev_target, KERN_ERR, "Write Buffer failure %x\n", sreq->sr_result);
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SPI_PRINTK(sdev->sdev_target, KERN_ERR, "Write Buffer failure %x\n", result);
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return SPI_COMPARE_FAILURE;
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}
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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_data_direction = DMA_FROM_DEVICE;
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spi_wait_req(sreq, spi_read_buffer, ptr, len);
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spi_execute(sdev, spi_read_buffer, DMA_FROM_DEVICE,
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ptr, len, NULL);
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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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@ -635,25 +640,22 @@ spi_dv_device_echo_buffer(struct scsi_request *sreq, u8 *buffer,
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/* This is for the simplest form of Domain Validation: a read test
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* on the inquiry data from the device */
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static enum spi_compare_returns
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spi_dv_device_compare_inquiry(struct scsi_request *sreq, u8 *buffer,
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spi_dv_device_compare_inquiry(struct scsi_device *sdev, u8 *buffer,
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u8 *ptr, const int retries)
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{
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int r;
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const int len = sreq->sr_device->inquiry_len;
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struct scsi_device *sdev = sreq->sr_device;
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int r, result;
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const int len = sdev->inquiry_len;
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const char spi_inquiry[] = {
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INQUIRY, 0, 0, 0, len, 0
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};
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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_data_direction = DMA_FROM_DEVICE;
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memset(ptr, 0, len);
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spi_wait_req(sreq, spi_inquiry, ptr, len);
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result = spi_execute(sdev, spi_inquiry, DMA_FROM_DEVICE,
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ptr, len, NULL);
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if(sreq->sr_result || !scsi_device_online(sdev)) {
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if(result || !scsi_device_online(sdev)) {
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scsi_device_set_state(sdev, SDEV_QUIESCE);
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return SPI_COMPARE_FAILURE;
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}
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@ -674,12 +676,11 @@ spi_dv_device_compare_inquiry(struct scsi_request *sreq, u8 *buffer,
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}
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static enum spi_compare_returns
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spi_dv_retrain(struct scsi_request *sreq, u8 *buffer, u8 *ptr,
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spi_dv_retrain(struct scsi_device *sdev, u8 *buffer, u8 *ptr,
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enum spi_compare_returns
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(*compare_fn)(struct scsi_request *, u8 *, u8 *, int))
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(*compare_fn)(struct scsi_device *, u8 *, u8 *, int))
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{
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struct spi_internal *i = to_spi_internal(sreq->sr_host->transportt);
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struct scsi_device *sdev = sreq->sr_device;
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struct spi_internal *i = to_spi_internal(sdev->host->transportt);
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struct scsi_target *starget = sdev->sdev_target;
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int period = 0, prevperiod = 0;
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enum spi_compare_returns retval;
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@ -687,7 +688,7 @@ spi_dv_retrain(struct scsi_request *sreq, u8 *buffer, u8 *ptr,
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for (;;) {
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int newperiod;
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retval = compare_fn(sreq, buffer, ptr, DV_LOOPS);
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retval = compare_fn(sdev, buffer, ptr, DV_LOOPS);
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if (retval == SPI_COMPARE_SUCCESS
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|| retval == SPI_COMPARE_SKIP_TEST)
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@ -733,9 +734,9 @@ spi_dv_retrain(struct scsi_request *sreq, u8 *buffer, u8 *ptr,
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}
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static int
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spi_dv_device_get_echo_buffer(struct scsi_request *sreq, u8 *buffer)
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spi_dv_device_get_echo_buffer(struct scsi_device *sdev, u8 *buffer)
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{
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int l;
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int l, result;
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/* first off do a test unit ready. This can error out
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* because of reservations or some other reason. If it
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@ -751,18 +752,16 @@ spi_dv_device_get_echo_buffer(struct scsi_request *sreq, u8 *buffer)
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};
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sreq->sr_cmd_len = 0;
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sreq->sr_data_direction = DMA_NONE;
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/* We send a set of three TURs to clear any outstanding
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* unit attention conditions if they exist (Otherwise the
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* buffer tests won't be happy). If the TUR still fails
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* (reservation conflict, device not ready, etc) just
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* skip the write tests */
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for (l = 0; ; l++) {
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spi_wait_req(sreq, spi_test_unit_ready, NULL, 0);
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result = spi_execute(sdev, spi_test_unit_ready, DMA_NONE,
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NULL, 0, NULL);
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if(sreq->sr_result) {
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if(result) {
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if(l >= 3)
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return 0;
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} else {
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@ -771,12 +770,10 @@ spi_dv_device_get_echo_buffer(struct scsi_request *sreq, u8 *buffer)
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}
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}
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sreq->sr_cmd_len = 0;
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sreq->sr_data_direction = DMA_FROM_DEVICE;
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result = spi_execute(sdev, spi_read_buffer_descriptor,
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DMA_FROM_DEVICE, buffer, 4, NULL);
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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 (result)
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/* Device has no echo buffer */
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return 0;
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@ -784,17 +781,16 @@ spi_dv_device_get_echo_buffer(struct scsi_request *sreq, u8 *buffer)
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}
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static void
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spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer)
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spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer)
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{
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struct spi_internal *i = to_spi_internal(sreq->sr_host->transportt);
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struct scsi_device *sdev = sreq->sr_device;
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struct spi_internal *i = to_spi_internal(sdev->host->transportt);
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struct scsi_target *starget = sdev->sdev_target;
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int len = sdev->inquiry_len;
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/* first set us up for narrow async */
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DV_SET(offset, 0);
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DV_SET(width, 0);
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if (spi_dv_device_compare_inquiry(sreq, buffer, buffer, DV_LOOPS)
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if (spi_dv_device_compare_inquiry(sdev, buffer, buffer, DV_LOOPS)
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!= SPI_COMPARE_SUCCESS) {
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SPI_PRINTK(starget, KERN_ERR, "Domain Validation Initial Inquiry Failed\n");
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/* FIXME: should probably offline the device here? */
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@ -806,7 +802,7 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer)
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scsi_device_wide(sdev)) {
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i->f->set_width(starget, 1);
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if (spi_dv_device_compare_inquiry(sreq, buffer,
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if (spi_dv_device_compare_inquiry(sdev, buffer,
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buffer + len,
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DV_LOOPS)
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!= SPI_COMPARE_SUCCESS) {
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@ -827,7 +823,7 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer)
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len = 0;
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if (scsi_device_dt(sdev))
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len = spi_dv_device_get_echo_buffer(sreq, buffer);
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len = spi_dv_device_get_echo_buffer(sdev, buffer);
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retry:
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@ -853,7 +849,7 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer)
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if (len == 0) {
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SPI_PRINTK(starget, KERN_INFO, "Domain Validation skipping write tests\n");
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spi_dv_retrain(sreq, buffer, buffer + len,
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spi_dv_retrain(sdev, buffer, buffer + len,
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spi_dv_device_compare_inquiry);
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return;
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}
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@ -863,7 +859,7 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer)
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len = SPI_MAX_ECHO_BUFFER_SIZE;
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}
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if (spi_dv_retrain(sreq, buffer, buffer + len,
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if (spi_dv_retrain(sdev, buffer, buffer + len,
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spi_dv_device_echo_buffer)
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== SPI_COMPARE_SKIP_TEST) {
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/* OK, the stupid drive can't do a write echo buffer
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@ -886,16 +882,12 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer)
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void
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spi_dv_device(struct scsi_device *sdev)
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{
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struct scsi_request *sreq = scsi_allocate_request(sdev, GFP_KERNEL);
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struct scsi_target *starget = sdev->sdev_target;
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u8 *buffer;
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const int len = SPI_MAX_ECHO_BUFFER_SIZE*2;
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if (unlikely(!sreq))
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return;
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if (unlikely(scsi_device_get(sdev)))
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goto out_free_req;
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return;
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buffer = kmalloc(len, GFP_KERNEL);
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@ -916,7 +908,7 @@ spi_dv_device(struct scsi_device *sdev)
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SPI_PRINTK(starget, KERN_INFO, "Beginning Domain Validation\n");
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spi_dv_device_internal(sreq, buffer);
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spi_dv_device_internal(sdev, buffer);
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SPI_PRINTK(starget, KERN_INFO, "Ending Domain Validation\n");
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@ -931,8 +923,6 @@ spi_dv_device(struct scsi_device *sdev)
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kfree(buffer);
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out_put:
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scsi_device_put(sdev);
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out_free_req:
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scsi_release_request(sreq);
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}
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EXPORT_SYMBOL(spi_dv_device);
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@ -256,6 +256,19 @@ extern void int_to_scsilun(unsigned int, struct scsi_lun *);
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extern const char *scsi_device_state_name(enum scsi_device_state);
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extern int scsi_is_sdev_device(const struct device *);
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extern int scsi_is_target_device(const struct device *);
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extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
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int data_direction, void *buffer, unsigned bufflen,
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unsigned char *sense, int timeout, int retries,
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int flag);
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static inline int
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scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
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int data_direction, void *buffer, unsigned bufflen,
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unsigned char *sense, int timeout, int retries)
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{
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return scsi_execute(sdev, cmd, data_direction, buffer, bufflen, sense,
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timeout, retries, 0);
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}
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static inline int scsi_device_online(struct scsi_device *sdev)
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{
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return sdev->sdev_state != SDEV_OFFLINE;
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@ -26,6 +26,14 @@ struct scsi_sense_hdr { /* See SPC-3 section 4.5 */
|
|||
u8 additional_length; /* always 0 for fixed sense format */
|
||||
};
|
||||
|
||||
static inline int scsi_sense_valid(struct scsi_sense_hdr *sshdr)
|
||||
{
|
||||
if (!sshdr)
|
||||
return 0;
|
||||
|
||||
return (sshdr->response_code & 0x70) == 0x70;
|
||||
}
|
||||
|
||||
|
||||
extern void scsi_add_timer(struct scsi_cmnd *, int,
|
||||
void (*)(struct scsi_cmnd *));
|
||||
|
|
|
|||
|
|
@ -54,8 +54,4 @@ extern void scsi_do_req(struct scsi_request *, const void *cmnd,
|
|||
void *buffer, unsigned bufflen,
|
||||
void (*done) (struct scsi_cmnd *),
|
||||
int timeout, int retries);
|
||||
extern int scsi_execute_req(struct scsi_device *sdev, unsigned char *cmd,
|
||||
int data_direction, void *buffer, unsigned bufflen,
|
||||
unsigned char *sense, int timeout, int retries);
|
||||
|
||||
#endif /* _SCSI_SCSI_REQUEST_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue