| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/sched.h> |
| #include <linux/errno.h> |
| #include <linux/slab.h> |
| |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_eh.h> |
| #include <scsi/scsi_device.h> |
| |
| #include "usb.h" |
| #include "scsiglue.h" |
| #include "transport.h" |
| |
| /*********************************************************************** |
| * Data transfer routines |
| ***********************************************************************/ |
| /* |
| * usb_stor_blocking_completion() |
| */ |
| static void usb_stor_blocking_completion(struct urb *urb) |
| { |
| struct completion *urb_done_ptr = urb->context; |
| |
| /* pr_info("transport --- usb_stor_blocking_completion\n"); */ |
| complete(urb_done_ptr); |
| } |
| |
| /* |
| * usb_stor_msg_common() |
| */ |
| static int usb_stor_msg_common(struct us_data *us, int timeout) |
| { |
| struct completion urb_done; |
| long timeleft; |
| int status; |
| |
| /* pr_info("transport --- usb_stor_msg_common\n"); */ |
| if (test_bit(US_FLIDX_ABORTING, &us->dflags)) |
| return -EIO; |
| |
| init_completion(&urb_done); |
| |
| us->current_urb->context = &urb_done; |
| us->current_urb->actual_length = 0; |
| us->current_urb->error_count = 0; |
| us->current_urb->status = 0; |
| |
| us->current_urb->transfer_flags = 0; |
| if (us->current_urb->transfer_buffer == us->iobuf) |
| us->current_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| us->current_urb->transfer_dma = us->iobuf_dma; |
| us->current_urb->setup_dma = us->cr_dma; |
| |
| status = usb_submit_urb(us->current_urb, GFP_NOIO); |
| if (status) |
| return status; |
| |
| set_bit(US_FLIDX_URB_ACTIVE, &us->dflags); |
| |
| if (test_bit(US_FLIDX_ABORTING, &us->dflags)) { |
| if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags)) { |
| /* pr_info("-- cancelling URB\n"); */ |
| usb_unlink_urb(us->current_urb); |
| } |
| } |
| |
| timeleft = wait_for_completion_interruptible_timeout(&urb_done, |
| timeout ? : MAX_SCHEDULE_TIMEOUT); |
| clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags); |
| |
| if (timeleft <= 0) { |
| /* pr_info("%s -- cancelling URB\n", |
| timeleft == 0 ? "Timeout" : "Signal"); */ |
| usb_kill_urb(us->current_urb); |
| } |
| |
| return us->current_urb->status; |
| } |
| |
| /* |
| * usb_stor_control_msg() |
| */ |
| int usb_stor_control_msg(struct us_data *us, unsigned int pipe, |
| u8 request, u8 requesttype, u16 value, u16 index, |
| void *data, u16 size, int timeout) |
| { |
| int status; |
| |
| /* pr_info("transport --- usb_stor_control_msg\n"); */ |
| |
| /* fill in the devrequest structure */ |
| us->cr->bRequestType = requesttype; |
| us->cr->bRequest = request; |
| us->cr->wValue = cpu_to_le16(value); |
| us->cr->wIndex = cpu_to_le16(index); |
| us->cr->wLength = cpu_to_le16(size); |
| |
| /* fill and submit the URB */ |
| usb_fill_control_urb(us->current_urb, us->pusb_dev, pipe, |
| (unsigned char *) us->cr, data, size, |
| usb_stor_blocking_completion, NULL); |
| status = usb_stor_msg_common(us, timeout); |
| |
| /* return the actual length of the data transferred if no error */ |
| if (status == 0) |
| status = us->current_urb->actual_length; |
| return status; |
| } |
| |
| /* |
| * usb_stor_clear_halt() |
| */ |
| int usb_stor_clear_halt(struct us_data *us, unsigned int pipe) |
| { |
| int result; |
| int endp = usb_pipeendpoint(pipe); |
| |
| /* pr_info("transport --- usb_stor_clear_halt\n"); */ |
| if (usb_pipein(pipe)) |
| endp |= USB_DIR_IN; |
| |
| result = usb_stor_control_msg(us, us->send_ctrl_pipe, |
| USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, |
| USB_ENDPOINT_HALT, endp, |
| NULL, 0, 3*HZ); |
| |
| /* reset the endpoint toggle */ |
| if (result >= 0) |
| /* usb_settoggle(us->pusb_dev, usb_pipeendpoint(pipe), |
| usb_pipeout(pipe), 0); */ |
| usb_reset_endpoint(us->pusb_dev, endp); |
| |
| return result; |
| } |
| |
| /* |
| * interpret_urb_result() |
| */ |
| static int interpret_urb_result(struct us_data *us, unsigned int pipe, |
| unsigned int length, int result, unsigned int partial) |
| { |
| /* pr_info("transport --- interpret_urb_result\n"); */ |
| switch (result) { |
| /* no error code; did we send all the data? */ |
| case 0: |
| if (partial != length) { |
| /* pr_info("-- short transfer\n"); */ |
| return USB_STOR_XFER_SHORT; |
| } |
| /* pr_info("-- transfer complete\n"); */ |
| return USB_STOR_XFER_GOOD; |
| case -EPIPE: |
| if (usb_pipecontrol(pipe)) { |
| /* pr_info("-- stall on control pipe\n"); */ |
| return USB_STOR_XFER_STALLED; |
| } |
| /* pr_info("clearing endpoint halt for pipe 0x%x\n", pipe); */ |
| if (usb_stor_clear_halt(us, pipe) < 0) |
| return USB_STOR_XFER_ERROR; |
| return USB_STOR_XFER_STALLED; |
| case -EOVERFLOW: |
| /* pr_info("-- babble\n"); */ |
| return USB_STOR_XFER_LONG; |
| case -ECONNRESET: |
| /* pr_info("-- transfer cancelled\n"); */ |
| return USB_STOR_XFER_ERROR; |
| case -EREMOTEIO: |
| /* pr_info("-- short read transfer\n"); */ |
| return USB_STOR_XFER_SHORT; |
| case -EIO: |
| /* pr_info("-- abort or disconnect in progress\n"); */ |
| return USB_STOR_XFER_ERROR; |
| default: |
| /* pr_info("-- unknown error\n"); */ |
| return USB_STOR_XFER_ERROR; |
| } |
| } |
| |
| /* |
| * usb_stor_bulk_transfer_buf() |
| */ |
| int usb_stor_bulk_transfer_buf(struct us_data *us, unsigned int pipe, |
| void *buf, unsigned int length, unsigned int *act_len) |
| { |
| int result; |
| |
| /* pr_info("transport --- usb_stor_bulk_transfer_buf\n"); */ |
| |
| /* fill and submit the URB */ |
| usb_fill_bulk_urb(us->current_urb, us->pusb_dev, pipe, buf, |
| length, usb_stor_blocking_completion, NULL); |
| result = usb_stor_msg_common(us, 0); |
| |
| /* store the actual length of the data transferred */ |
| if (act_len) |
| *act_len = us->current_urb->actual_length; |
| |
| return interpret_urb_result(us, pipe, length, result, |
| us->current_urb->actual_length); |
| } |
| |
| /* |
| * usb_stor_bulk_transfer_sglist() |
| */ |
| static int usb_stor_bulk_transfer_sglist(struct us_data *us, unsigned int pipe, |
| struct scatterlist *sg, int num_sg, unsigned int length, |
| unsigned int *act_len) |
| { |
| int result; |
| |
| /* pr_info("transport --- usb_stor_bulk_transfer_sglist\n"); */ |
| if (test_bit(US_FLIDX_ABORTING, &us->dflags)) |
| return USB_STOR_XFER_ERROR; |
| |
| /* initialize the scatter-gather request block */ |
| result = usb_sg_init(&us->current_sg, us->pusb_dev, pipe, 0, |
| sg, num_sg, length, GFP_NOIO); |
| if (result) { |
| /* pr_info("usb_sg_init returned %d\n", result); */ |
| return USB_STOR_XFER_ERROR; |
| } |
| |
| /* since the block has been initialized successfully, |
| it's now okay to cancel it */ |
| set_bit(US_FLIDX_SG_ACTIVE, &us->dflags); |
| |
| /* did an abort/disconnect occur during the submission? */ |
| if (test_bit(US_FLIDX_ABORTING, &us->dflags)) { |
| /* cancel the request, if it hasn't been cancelled already */ |
| if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags)) { |
| /* pr_info("-- cancelling sg request\n"); */ |
| usb_sg_cancel(&us->current_sg); |
| } |
| } |
| |
| /* wait for the completion of the transfer */ |
| usb_sg_wait(&us->current_sg); |
| clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags); |
| |
| result = us->current_sg.status; |
| if (act_len) |
| *act_len = us->current_sg.bytes; |
| |
| return interpret_urb_result(us, pipe, length, |
| result, us->current_sg.bytes); |
| } |
| |
| /* |
| * usb_stor_bulk_srb() |
| */ |
| int usb_stor_bulk_srb(struct us_data *us, unsigned int pipe, |
| struct scsi_cmnd *srb) |
| { |
| unsigned int partial; |
| int result = usb_stor_bulk_transfer_sglist(us, pipe, scsi_sglist(srb), |
| scsi_sg_count(srb), scsi_bufflen(srb), |
| &partial); |
| |
| scsi_set_resid(srb, scsi_bufflen(srb) - partial); |
| return result; |
| } |
| |
| /* |
| * usb_stor_bulk_transfer_sg() |
| */ |
| int usb_stor_bulk_transfer_sg(struct us_data *us, unsigned int pipe, |
| void *buf, unsigned int length_left, int use_sg, int *residual) |
| { |
| int result; |
| unsigned int partial; |
| |
| /* pr_info("transport --- usb_stor_bulk_transfer_sg\n"); */ |
| /* are we scatter-gathering? */ |
| if (use_sg) { |
| /* use the usb core scatter-gather primitives */ |
| result = usb_stor_bulk_transfer_sglist(us, pipe, |
| (struct scatterlist *) buf, use_sg, |
| length_left, &partial); |
| length_left -= partial; |
| } else { |
| /* no scatter-gather, just make the request */ |
| result = usb_stor_bulk_transfer_buf(us, pipe, buf, |
| length_left, &partial); |
| length_left -= partial; |
| } |
| |
| /* store the residual and return the error code */ |
| if (residual) |
| *residual = length_left; |
| return result; |
| } |
| |
| /*********************************************************************** |
| * Transport routines |
| ***********************************************************************/ |
| /* |
| * usb_stor_invoke_transport() |
| */ |
| void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us) |
| { |
| int need_auto_sense; |
| int result; |
| |
| /* pr_info("transport --- usb_stor_invoke_transport\n"); */ |
| usb_stor_print_cmd(us, srb); |
| /* send the command to the transport layer */ |
| scsi_set_resid(srb, 0); |
| result = us->transport(srb, us); /* usb_stor_Bulk_transport; */ |
| |
| /* if the command gets aborted by the higher layers, |
| we need to short-circuit all other processing */ |
| if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
| /* pr_info("-- command was aborted\n"); */ |
| srb->result = DID_ABORT << 16; |
| goto Handle_Errors; |
| } |
| |
| /* if there is a transport error, reset and don't auto-sense */ |
| if (result == USB_STOR_TRANSPORT_ERROR) { |
| /* pr_info("-- transport indicates error, resetting\n"); */ |
| srb->result = DID_ERROR << 16; |
| goto Handle_Errors; |
| } |
| |
| /* if the transport provided its own sense data, don't auto-sense */ |
| if (result == USB_STOR_TRANSPORT_NO_SENSE) { |
| srb->result = SAM_STAT_CHECK_CONDITION; |
| return; |
| } |
| |
| srb->result = SAM_STAT_GOOD; |
| |
| /* Determine if we need to auto-sense */ |
| need_auto_sense = 0; |
| |
| if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_DPCM_USB) && |
| srb->sc_data_direction != DMA_FROM_DEVICE) { |
| /* pr_info("-- CB transport device requiring auto-sense\n"); */ |
| need_auto_sense = 1; |
| } |
| |
| if (result == USB_STOR_TRANSPORT_FAILED) { |
| /* pr_info("-- transport indicates command failure\n"); */ |
| need_auto_sense = 1; |
| } |
| |
| /* Now, if we need to do the auto-sense, let's do it */ |
| if (need_auto_sense) { |
| int temp_result; |
| struct scsi_eh_save ses; |
| |
| pr_info("Issuing auto-REQUEST_SENSE\n"); |
| |
| scsi_eh_prep_cmnd(srb, &ses, NULL, 0, US_SENSE_SIZE); |
| |
| /* we must do the protocol translation here */ |
| if (us->subclass == USB_SC_RBC || |
| us->subclass == USB_SC_SCSI || |
| us->subclass == USB_SC_CYP_ATACB) { |
| srb->cmd_len = 6; |
| } else { |
| srb->cmd_len = 12; |
| } |
| /* issue the auto-sense command */ |
| scsi_set_resid(srb, 0); |
| temp_result = us->transport(us->srb, us); |
| |
| /* let's clean up right away */ |
| scsi_eh_restore_cmnd(srb, &ses); |
| |
| if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
| /* pr_info("-- auto-sense aborted\n"); */ |
| srb->result = DID_ABORT << 16; |
| goto Handle_Errors; |
| } |
| if (temp_result != USB_STOR_TRANSPORT_GOOD) { |
| /* pr_info("-- auto-sense failure\n"); */ |
| srb->result = DID_ERROR << 16; |
| if (!(us->fflags & US_FL_SCM_MULT_TARG)) |
| goto Handle_Errors; |
| return; |
| } |
| |
| /* set the result so the higher layers expect this data */ |
| srb->result = SAM_STAT_CHECK_CONDITION; |
| |
| if (result == USB_STOR_TRANSPORT_GOOD && |
| (srb->sense_buffer[2] & 0xaf) == 0 && |
| srb->sense_buffer[12] == 0 && |
| srb->sense_buffer[13] == 0) { |
| srb->result = SAM_STAT_GOOD; |
| srb->sense_buffer[0] = 0x0; |
| } |
| } |
| |
| /* Did we transfer less than the minimum amount required? */ |
| if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) - |
| scsi_get_resid(srb) < srb->underflow) |
| srb->result = (DID_ERROR << 16); |
| /* v02 | (SUGGEST_RETRY << 24); */ |
| |
| return; |
| |
| Handle_Errors: |
| scsi_lock(us_to_host(us)); |
| set_bit(US_FLIDX_RESETTING, &us->dflags); |
| clear_bit(US_FLIDX_ABORTING, &us->dflags); |
| scsi_unlock(us_to_host(us)); |
| |
| mutex_unlock(&us->dev_mutex); |
| result = usb_stor_port_reset(us); |
| mutex_lock(&us->dev_mutex); |
| |
| if (result < 0) { |
| scsi_lock(us_to_host(us)); |
| usb_stor_report_device_reset(us); |
| scsi_unlock(us_to_host(us)); |
| us->transport_reset(us); |
| } |
| clear_bit(US_FLIDX_RESETTING, &us->dflags); |
| } |
| |
| /* |
| * ENE_stor_invoke_transport() |
| */ |
| void ENE_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us) |
| { |
| int result = 0; |
| |
| /* pr_info("transport --- ENE_stor_invoke_transport\n"); */ |
| usb_stor_print_cmd(us, srb); |
| /* send the command to the transport layer */ |
| scsi_set_resid(srb, 0); |
| if (!(us->SM_Status.Ready)) |
| result = ENE_InitMedia(us); |
| |
| if (us->Power_IsResum == true) { |
| result = ENE_InitMedia(us); |
| us->Power_IsResum = false; |
| } |
| |
| if (us->SM_Status.Ready) |
| result = SM_SCSIIrp(us, srb); |
| |
| /* if the command gets aborted by the higher layers, |
| we need to short-circuit all other processing */ |
| if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
| /* pr_info("-- command was aborted\n"); */ |
| srb->result = DID_ABORT << 16; |
| goto Handle_Errors; |
| } |
| |
| /* if there is a transport error, reset and don't auto-sense */ |
| if (result == USB_STOR_TRANSPORT_ERROR) { |
| /* pr_info("-- transport indicates error, resetting\n"); */ |
| srb->result = DID_ERROR << 16; |
| goto Handle_Errors; |
| } |
| |
| /* if the transport provided its own sense data, don't auto-sense */ |
| if (result == USB_STOR_TRANSPORT_NO_SENSE) { |
| srb->result = SAM_STAT_CHECK_CONDITION; |
| return; |
| } |
| |
| srb->result = SAM_STAT_GOOD; |
| if (result == USB_STOR_TRANSPORT_FAILED) { |
| /* pr_info("-- transport indicates command failure\n"); */ |
| /* need_auto_sense = 1; */ |
| BuildSenseBuffer(srb, us->SrbStatus); |
| srb->result = SAM_STAT_CHECK_CONDITION; |
| } |
| |
| /* Did we transfer less than the minimum amount required? */ |
| if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) - |
| scsi_get_resid(srb) < srb->underflow) |
| srb->result = (DID_ERROR << 16); |
| /* v02 | (SUGGEST_RETRY << 24); */ |
| |
| return; |
| |
| Handle_Errors: |
| scsi_lock(us_to_host(us)); |
| set_bit(US_FLIDX_RESETTING, &us->dflags); |
| clear_bit(US_FLIDX_ABORTING, &us->dflags); |
| scsi_unlock(us_to_host(us)); |
| |
| mutex_unlock(&us->dev_mutex); |
| result = usb_stor_port_reset(us); |
| mutex_lock(&us->dev_mutex); |
| |
| if (result < 0) { |
| scsi_lock(us_to_host(us)); |
| usb_stor_report_device_reset(us); |
| scsi_unlock(us_to_host(us)); |
| us->transport_reset(us); |
| } |
| clear_bit(US_FLIDX_RESETTING, &us->dflags); |
| } |
| |
| /* |
| * BuildSenseBuffer() |
| */ |
| void BuildSenseBuffer(struct scsi_cmnd *srb, int SrbStatus) |
| { |
| BYTE *buf = srb->sense_buffer; |
| BYTE asc; |
| |
| pr_info("transport --- BuildSenseBuffer\n"); |
| switch (SrbStatus) { |
| case SS_NOT_READY: |
| asc = 0x3a; |
| break; /* sense key = 0x02 */ |
| case SS_MEDIUM_ERR: |
| asc = 0x0c; |
| break; /* sense key = 0x03 */ |
| case SS_ILLEGAL_REQUEST: |
| asc = 0x20; |
| break; /* sense key = 0x05 */ |
| default: |
| asc = 0x00; |
| break; /* ?? */ |
| } |
| |
| memset(buf, 0, 18); |
| buf[0x00] = 0xf0; |
| buf[0x02] = SrbStatus; |
| buf[0x07] = 0x0b; |
| buf[0x0c] = asc; |
| } |
| |
| /* |
| * usb_stor_stop_transport() |
| */ |
| void usb_stor_stop_transport(struct us_data *us) |
| { |
| /* pr_info("transport --- usb_stor_stop_transport\n"); */ |
| |
| if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags)) { |
| /* pr_info("-- cancelling URB\n"); */ |
| usb_unlink_urb(us->current_urb); |
| } |
| |
| if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags)) { |
| /* pr_info("-- cancelling sg request\n"); */ |
| usb_sg_cancel(&us->current_sg); |
| } |
| } |
| |
| /* |
| * usb_stor_Bulk_max_lun() |
| */ |
| int usb_stor_Bulk_max_lun(struct us_data *us) |
| { |
| int result; |
| |
| /* pr_info("transport --- usb_stor_Bulk_max_lun\n"); */ |
| /* issue the command */ |
| us->iobuf[0] = 0; |
| result = usb_stor_control_msg(us, us->recv_ctrl_pipe, |
| US_BULK_GET_MAX_LUN, |
| USB_DIR_IN | USB_TYPE_CLASS | |
| USB_RECIP_INTERFACE, |
| 0, us->ifnum, us->iobuf, 1, HZ); |
| |
| /* pr_info("GetMaxLUN command result is %d, data is %d\n", |
| result, us->iobuf[0]); */ |
| |
| /* if we have a successful request, return the result */ |
| if (result > 0) |
| return us->iobuf[0]; |
| |
| return 0; |
| } |
| |
| /* |
| * usb_stor_Bulk_transport() |
| */ |
| int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us) |
| { |
| struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf; |
| struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf; |
| unsigned int transfer_length = scsi_bufflen(srb); |
| unsigned int residue; |
| int result; |
| int fake_sense = 0; |
| unsigned int cswlen; |
| unsigned int cbwlen = US_BULK_CB_WRAP_LEN; |
| |
| /* pr_info("transport --- usb_stor_Bulk_transport\n"); */ |
| /* Take care of BULK32 devices; set extra byte to 0 */ |
| if (unlikely(us->fflags & US_FL_BULK32)) { |
| cbwlen = 32; |
| us->iobuf[31] = 0; |
| } |
| |
| /* set up the command wrapper */ |
| bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN); |
| bcb->DataTransferLength = cpu_to_le32(transfer_length); |
| bcb->Flags = srb->sc_data_direction == DMA_FROM_DEVICE ? 1 << 7 : 0; |
| bcb->Tag = ++us->tag; |
| bcb->Lun = srb->device->lun; |
| if (us->fflags & US_FL_SCM_MULT_TARG) |
| bcb->Lun |= srb->device->id << 4; |
| bcb->Length = srb->cmd_len; |
| |
| /* copy the command payload */ |
| memset(bcb->CDB, 0, sizeof(bcb->CDB)); |
| memcpy(bcb->CDB, srb->cmnd, bcb->Length); |
| |
| /* send command */ |
| /* send it to out endpoint */ |
| /* pr_info("Bulk Command S 0x%x T 0x%x L %d F %d Trg %d LUN %d CL %d\n", |
| le32_to_cpu(bcb->Signature), bcb->Tag, |
| le32_to_cpu(bcb->DataTransferLength), bcb->Flags, |
| (bcb->Lun >> 4), (bcb->Lun & 0x0F), |
| bcb->Length); */ |
| result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, |
| bcb, cbwlen, NULL); |
| /* pr_info("Bulk command transfer result=%d\n", result); */ |
| if (result != USB_STOR_XFER_GOOD) |
| return USB_STOR_TRANSPORT_ERROR; |
| |
| if (unlikely(us->fflags & US_FL_GO_SLOW)) |
| udelay(125); |
| |
| /* R/W data */ |
| if (transfer_length) { |
| unsigned int pipe; |
| if (srb->sc_data_direction == DMA_FROM_DEVICE) |
| pipe = us->recv_bulk_pipe; |
| else |
| pipe = us->send_bulk_pipe; |
| |
| result = usb_stor_bulk_srb(us, pipe, srb); |
| /* pr_info("Bulk data transfer result 0x%x\n", result); */ |
| if (result == USB_STOR_XFER_ERROR) |
| return USB_STOR_TRANSPORT_ERROR; |
| |
| if (result == USB_STOR_XFER_LONG) |
| fake_sense = 1; |
| } |
| |
| /* get CSW for device status */ |
| /* pr_info("Attempting to get CSW...\n"); */ |
| result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, |
| US_BULK_CS_WRAP_LEN, &cswlen); |
| |
| if (result == USB_STOR_XFER_SHORT && cswlen == 0) { |
| /* pr_info("Received 0-length CSW; retrying...\n"); */ |
| result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, |
| US_BULK_CS_WRAP_LEN, &cswlen); |
| } |
| |
| /* did the attempt to read the CSW fail? */ |
| if (result == USB_STOR_XFER_STALLED) { |
| /* get the status again */ |
| /* pr_info("Attempting to get CSW (2nd try)...\n"); */ |
| result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, |
| US_BULK_CS_WRAP_LEN, NULL); |
| } |
| |
| /* if we still have a failure at this point, we're in trouble */ |
| /* pr_info("Bulk status result = %d\n", result); */ |
| if (result != USB_STOR_XFER_GOOD) |
| return USB_STOR_TRANSPORT_ERROR; |
| |
| /* check bulk status */ |
| residue = le32_to_cpu(bcs->Residue); |
| /* pr_info("Bulk Status S 0x%x T 0x%x R %u Stat 0x%x\n", |
| le32_to_cpu(bcs->Signature), |
| bcs->Tag, residue, bcs->Status); */ |
| if (!(bcs->Tag == us->tag || |
| (us->fflags & US_FL_BULK_IGNORE_TAG)) || |
| bcs->Status > US_BULK_STAT_PHASE) { |
| /* pr_info("Bulk logical error\n"); */ |
| return USB_STOR_TRANSPORT_ERROR; |
| } |
| |
| if (!us->bcs_signature) { |
| us->bcs_signature = bcs->Signature; |
| /* if (us->bcs_signature != cpu_to_le32(US_BULK_CS_SIGN)) */ |
| /* pr_info("Learnt BCS signature 0x%08X\n", |
| le32_to_cpu(us->bcs_signature)); */ |
| } else if (bcs->Signature != us->bcs_signature) { |
| /* pr_info("Signature mismatch: got %08X, expecting %08X\n", |
| le32_to_cpu(bcs->Signature), |
| le32_to_cpu(us->bcs_signature)); */ |
| return USB_STOR_TRANSPORT_ERROR; |
| } |
| |
| /* try to compute the actual residue, based on how much data |
| * was really transferred and what the device tells us */ |
| if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE)) { |
| |
| /* Heuristically detect devices that generate bogus residues |
| * by seeing what happens with INQUIRY and READ CAPACITY |
| * commands. |
| */ |
| if (bcs->Status == US_BULK_STAT_OK && |
| scsi_get_resid(srb) == 0 && |
| ((srb->cmnd[0] == INQUIRY && |
| transfer_length == 36) || |
| (srb->cmnd[0] == READ_CAPACITY && |
| transfer_length == 8))) { |
| us->fflags |= US_FL_IGNORE_RESIDUE; |
| |
| } else { |
| residue = min(residue, transfer_length); |
| scsi_set_resid(srb, max_t(int, scsi_get_resid(srb), |
| residue)); |
| } |
| } |
| |
| /* based on the status code, we report good or bad */ |
| switch (bcs->Status) { |
| case US_BULK_STAT_OK: |
| if (fake_sense) { |
| memcpy(srb->sense_buffer, usb_stor_sense_invalidCDB, |
| sizeof(usb_stor_sense_invalidCDB)); |
| return USB_STOR_TRANSPORT_NO_SENSE; |
| } |
| return USB_STOR_TRANSPORT_GOOD; |
| |
| case US_BULK_STAT_FAIL: |
| return USB_STOR_TRANSPORT_FAILED; |
| |
| case US_BULK_STAT_PHASE: |
| return USB_STOR_TRANSPORT_ERROR; |
| } |
| return USB_STOR_TRANSPORT_ERROR; |
| } |
| |
| /*********************************************************************** |
| * Reset routines |
| ***********************************************************************/ |
| /* |
| * usb_stor_reset_common() |
| */ |
| static int usb_stor_reset_common(struct us_data *us, |
| u8 request, u8 requesttype, |
| u16 value, u16 index, void *data, u16 size) |
| { |
| int result; |
| int result2; |
| |
| /* pr_info("transport --- usb_stor_reset_common\n"); */ |
| if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { |
| /* pr_info("No reset during disconnect\n"); */ |
| return -EIO; |
| } |
| |
| result = usb_stor_control_msg(us, us->send_ctrl_pipe, |
| request, requesttype, value, index, data, size, 5*HZ); |
| |
| if (result < 0) { |
| /* pr_info("Soft reset failed: %d\n", result); */ |
| return result; |
| } |
| |
| wait_event_interruptible_timeout(us->delay_wait, |
| test_bit(US_FLIDX_DISCONNECTING, &us->dflags), HZ*6); |
| |
| if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { |
| /* pr_info("Reset interrupted by disconnect\n"); */ |
| return -EIO; |
| } |
| |
| /* pr_info("Soft reset: clearing bulk-in endpoint halt\n"); */ |
| result = usb_stor_clear_halt(us, us->recv_bulk_pipe); |
| |
| /* pr_info("Soft reset: clearing bulk-out endpoint halt\n"); */ |
| result2 = usb_stor_clear_halt(us, us->send_bulk_pipe); |
| |
| /* return a result code based on the result of the clear-halts */ |
| if (result >= 0) |
| result = result2; |
| /* if (result < 0) */ |
| /* pr_info("Soft reset failed\n"); */ |
| /* else */ |
| /* pr_info("Soft reset done\n"); */ |
| return result; |
| } |
| |
| /* |
| * usb_stor_Bulk_reset() |
| */ |
| int usb_stor_Bulk_reset(struct us_data *us) |
| { |
| /* pr_info("transport --- usb_stor_Bulk_reset\n"); */ |
| return usb_stor_reset_common(us, US_BULK_RESET_REQUEST, |
| USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
| 0, us->ifnum, NULL, 0); |
| } |
| |
| /* |
| * usb_stor_port_reset() |
| */ |
| int usb_stor_port_reset(struct us_data *us) |
| { |
| int result; |
| |
| /* pr_info("transport --- usb_stor_port_reset\n"); */ |
| result = usb_lock_device_for_reset(us->pusb_dev, us->pusb_intf); |
| if (result < 0) |
| pr_info("unable to lock device for reset: %d\n", result); |
| else { |
| /* Were we disconnected while waiting for the lock? */ |
| if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { |
| result = -EIO; |
| /* pr_info("No reset during disconnect\n"); */ |
| } else { |
| result = usb_reset_device(us->pusb_dev); |
| /* pr_info("usb_reset_composite_device returns %d\n", |
| result); */ |
| } |
| usb_unlock_device(us->pusb_dev); |
| } |
| return result; |
| } |
| |
| |