824 lines
22 KiB
C
824 lines
22 KiB
C
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/sched.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_device.h>
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#include "usb.h"
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#include "scsiglue.h"
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#include "transport.h"
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/***********************************************************************
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* Data transfer routines
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***********************************************************************/
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/*
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* usb_stor_blocking_completion()
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*/
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static void usb_stor_blocking_completion(struct urb *urb)
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{
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struct completion *urb_done_ptr = urb->context;
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/* pr_info("transport --- usb_stor_blocking_completion\n"); */
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complete(urb_done_ptr);
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}
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/*
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* usb_stor_msg_common()
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*/
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static int usb_stor_msg_common(struct us_data *us, int timeout)
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{
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struct completion urb_done;
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long timeleft;
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int status;
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/* pr_info("transport --- usb_stor_msg_common\n"); */
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if (test_bit(US_FLIDX_ABORTING, &us->dflags))
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return -EIO;
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init_completion(&urb_done);
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us->current_urb->context = &urb_done;
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us->current_urb->actual_length = 0;
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us->current_urb->error_count = 0;
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us->current_urb->status = 0;
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us->current_urb->transfer_flags = 0;
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if (us->current_urb->transfer_buffer == us->iobuf)
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us->current_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
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us->current_urb->transfer_dma = us->iobuf_dma;
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us->current_urb->setup_dma = us->cr_dma;
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status = usb_submit_urb(us->current_urb, GFP_NOIO);
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if (status)
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return status;
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set_bit(US_FLIDX_URB_ACTIVE, &us->dflags);
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if (test_bit(US_FLIDX_ABORTING, &us->dflags)) {
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if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags)) {
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/* pr_info("-- cancelling URB\n"); */
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usb_unlink_urb(us->current_urb);
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}
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}
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timeleft = wait_for_completion_interruptible_timeout(&urb_done,
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timeout ? : MAX_SCHEDULE_TIMEOUT);
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clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags);
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if (timeleft <= 0) {
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/* pr_info("%s -- cancelling URB\n",
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timeleft == 0 ? "Timeout" : "Signal"); */
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usb_kill_urb(us->current_urb);
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}
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return us->current_urb->status;
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}
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/*
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* usb_stor_control_msg()
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*/
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int usb_stor_control_msg(struct us_data *us, unsigned int pipe,
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u8 request, u8 requesttype, u16 value, u16 index,
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void *data, u16 size, int timeout)
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{
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int status;
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/* pr_info("transport --- usb_stor_control_msg\n"); */
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/* fill in the devrequest structure */
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us->cr->bRequestType = requesttype;
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us->cr->bRequest = request;
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us->cr->wValue = cpu_to_le16(value);
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us->cr->wIndex = cpu_to_le16(index);
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us->cr->wLength = cpu_to_le16(size);
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/* fill and submit the URB */
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usb_fill_control_urb(us->current_urb, us->pusb_dev, pipe,
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(unsigned char *) us->cr, data, size,
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usb_stor_blocking_completion, NULL);
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status = usb_stor_msg_common(us, timeout);
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/* return the actual length of the data transferred if no error */
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if (status == 0)
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status = us->current_urb->actual_length;
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return status;
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}
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/*
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* usb_stor_clear_halt()
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*/
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int usb_stor_clear_halt(struct us_data *us, unsigned int pipe)
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{
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int result;
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int endp = usb_pipeendpoint(pipe);
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/* pr_info("transport --- usb_stor_clear_halt\n"); */
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if (usb_pipein(pipe))
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endp |= USB_DIR_IN;
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result = usb_stor_control_msg(us, us->send_ctrl_pipe,
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USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
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USB_ENDPOINT_HALT, endp,
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NULL, 0, 3*HZ);
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/* reset the endpoint toggle */
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if (result >= 0)
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/* usb_settoggle(us->pusb_dev, usb_pipeendpoint(pipe),
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usb_pipeout(pipe), 0); */
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usb_reset_endpoint(us->pusb_dev, endp);
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return result;
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}
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/*
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* interpret_urb_result()
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*/
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static int interpret_urb_result(struct us_data *us, unsigned int pipe,
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unsigned int length, int result, unsigned int partial)
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{
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/* pr_info("transport --- interpret_urb_result\n"); */
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switch (result) {
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/* no error code; did we send all the data? */
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case 0:
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if (partial != length) {
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/* pr_info("-- short transfer\n"); */
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return USB_STOR_XFER_SHORT;
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}
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/* pr_info("-- transfer complete\n"); */
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return USB_STOR_XFER_GOOD;
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case -EPIPE:
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if (usb_pipecontrol(pipe)) {
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/* pr_info("-- stall on control pipe\n"); */
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return USB_STOR_XFER_STALLED;
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}
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/* pr_info("clearing endpoint halt for pipe 0x%x\n", pipe); */
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if (usb_stor_clear_halt(us, pipe) < 0)
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return USB_STOR_XFER_ERROR;
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return USB_STOR_XFER_STALLED;
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case -EOVERFLOW:
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/* pr_info("-- babble\n"); */
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return USB_STOR_XFER_LONG;
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case -ECONNRESET:
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/* pr_info("-- transfer cancelled\n"); */
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return USB_STOR_XFER_ERROR;
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case -EREMOTEIO:
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/* pr_info("-- short read transfer\n"); */
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return USB_STOR_XFER_SHORT;
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case -EIO:
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/* pr_info("-- abort or disconnect in progress\n"); */
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return USB_STOR_XFER_ERROR;
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default:
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/* pr_info("-- unknown error\n"); */
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return USB_STOR_XFER_ERROR;
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}
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}
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/*
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* usb_stor_bulk_transfer_buf()
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*/
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int usb_stor_bulk_transfer_buf(struct us_data *us, unsigned int pipe,
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void *buf, unsigned int length, unsigned int *act_len)
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{
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int result;
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/* pr_info("transport --- usb_stor_bulk_transfer_buf\n"); */
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/* fill and submit the URB */
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usb_fill_bulk_urb(us->current_urb, us->pusb_dev, pipe, buf,
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length, usb_stor_blocking_completion, NULL);
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result = usb_stor_msg_common(us, 0);
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/* store the actual length of the data transferred */
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if (act_len)
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*act_len = us->current_urb->actual_length;
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return interpret_urb_result(us, pipe, length, result,
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us->current_urb->actual_length);
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}
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/*
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* usb_stor_bulk_transfer_sglist()
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*/
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static int usb_stor_bulk_transfer_sglist(struct us_data *us, unsigned int pipe,
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struct scatterlist *sg, int num_sg, unsigned int length,
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unsigned int *act_len)
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{
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int result;
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/* pr_info("transport --- usb_stor_bulk_transfer_sglist\n"); */
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if (test_bit(US_FLIDX_ABORTING, &us->dflags))
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return USB_STOR_XFER_ERROR;
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/* initialize the scatter-gather request block */
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result = usb_sg_init(&us->current_sg, us->pusb_dev, pipe, 0,
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sg, num_sg, length, GFP_NOIO);
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if (result) {
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/* pr_info("usb_sg_init returned %d\n", result); */
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return USB_STOR_XFER_ERROR;
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}
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/* since the block has been initialized successfully,
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it's now okay to cancel it */
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set_bit(US_FLIDX_SG_ACTIVE, &us->dflags);
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/* did an abort/disconnect occur during the submission? */
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if (test_bit(US_FLIDX_ABORTING, &us->dflags)) {
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/* cancel the request, if it hasn't been cancelled already */
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if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags)) {
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/* pr_info("-- cancelling sg request\n"); */
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usb_sg_cancel(&us->current_sg);
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}
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}
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/* wait for the completion of the transfer */
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usb_sg_wait(&us->current_sg);
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clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags);
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result = us->current_sg.status;
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if (act_len)
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*act_len = us->current_sg.bytes;
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return interpret_urb_result(us, pipe, length,
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result, us->current_sg.bytes);
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}
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/*
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* usb_stor_bulk_srb()
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*/
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int usb_stor_bulk_srb(struct us_data *us, unsigned int pipe,
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struct scsi_cmnd *srb)
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{
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unsigned int partial;
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int result = usb_stor_bulk_transfer_sglist(us, pipe, scsi_sglist(srb),
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scsi_sg_count(srb), scsi_bufflen(srb),
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&partial);
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scsi_set_resid(srb, scsi_bufflen(srb) - partial);
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return result;
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}
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/*
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* usb_stor_bulk_transfer_sg()
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*/
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int usb_stor_bulk_transfer_sg(struct us_data *us, unsigned int pipe,
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void *buf, unsigned int length_left, int use_sg, int *residual)
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{
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int result;
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unsigned int partial;
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/* pr_info("transport --- usb_stor_bulk_transfer_sg\n"); */
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/* are we scatter-gathering? */
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if (use_sg) {
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/* use the usb core scatter-gather primitives */
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result = usb_stor_bulk_transfer_sglist(us, pipe,
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(struct scatterlist *) buf, use_sg,
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length_left, &partial);
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length_left -= partial;
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} else {
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/* no scatter-gather, just make the request */
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result = usb_stor_bulk_transfer_buf(us, pipe, buf,
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length_left, &partial);
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length_left -= partial;
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}
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/* store the residual and return the error code */
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if (residual)
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*residual = length_left;
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return result;
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}
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/***********************************************************************
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* Transport routines
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***********************************************************************/
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/*
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* usb_stor_invoke_transport()
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*/
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void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
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{
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int need_auto_sense;
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int result;
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/* pr_info("transport --- usb_stor_invoke_transport\n"); */
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usb_stor_print_cmd(srb);
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/* send the command to the transport layer */
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scsi_set_resid(srb, 0);
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result = us->transport(srb, us); /* usb_stor_Bulk_transport; */
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/* if the command gets aborted by the higher layers,
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we need to short-circuit all other processing */
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if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
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/* pr_info("-- command was aborted\n"); */
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srb->result = DID_ABORT << 16;
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goto Handle_Errors;
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}
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/* if there is a transport error, reset and don't auto-sense */
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if (result == USB_STOR_TRANSPORT_ERROR) {
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/* pr_info("-- transport indicates error, resetting\n"); */
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srb->result = DID_ERROR << 16;
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goto Handle_Errors;
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}
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/* if the transport provided its own sense data, don't auto-sense */
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if (result == USB_STOR_TRANSPORT_NO_SENSE) {
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srb->result = SAM_STAT_CHECK_CONDITION;
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return;
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}
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srb->result = SAM_STAT_GOOD;
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/* Determine if we need to auto-sense */
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need_auto_sense = 0;
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if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_DPCM_USB) &&
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srb->sc_data_direction != DMA_FROM_DEVICE) {
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/* pr_info("-- CB transport device requiring auto-sense\n"); */
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need_auto_sense = 1;
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}
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if (result == USB_STOR_TRANSPORT_FAILED) {
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/* pr_info("-- transport indicates command failure\n"); */
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need_auto_sense = 1;
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}
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/* Now, if we need to do the auto-sense, let's do it */
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if (need_auto_sense) {
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int temp_result;
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struct scsi_eh_save ses;
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pr_info("Issuing auto-REQUEST_SENSE\n");
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scsi_eh_prep_cmnd(srb, &ses, NULL, 0, US_SENSE_SIZE);
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/* we must do the protocol translation here */
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if (us->subclass == USB_SC_RBC ||
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us->subclass == USB_SC_SCSI ||
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us->subclass == USB_SC_CYP_ATACB) {
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srb->cmd_len = 6;
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} else {
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srb->cmd_len = 12;
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}
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/* issue the auto-sense command */
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scsi_set_resid(srb, 0);
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temp_result = us->transport(us->srb, us);
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/* let's clean up right away */
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scsi_eh_restore_cmnd(srb, &ses);
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if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
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/* pr_info("-- auto-sense aborted\n"); */
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srb->result = DID_ABORT << 16;
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goto Handle_Errors;
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}
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if (temp_result != USB_STOR_TRANSPORT_GOOD) {
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/* pr_info("-- auto-sense failure\n"); */
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srb->result = DID_ERROR << 16;
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if (!(us->fflags & US_FL_SCM_MULT_TARG))
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goto Handle_Errors;
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return;
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}
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/* set the result so the higher layers expect this data */
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srb->result = SAM_STAT_CHECK_CONDITION;
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if (result == USB_STOR_TRANSPORT_GOOD &&
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(srb->sense_buffer[2] & 0xaf) == 0 &&
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srb->sense_buffer[12] == 0 &&
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srb->sense_buffer[13] == 0) {
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srb->result = SAM_STAT_GOOD;
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srb->sense_buffer[0] = 0x0;
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}
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}
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/* Did we transfer less than the minimum amount required? */
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if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) -
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scsi_get_resid(srb) < srb->underflow)
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srb->result = (DID_ERROR << 16);
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/* v02 | (SUGGEST_RETRY << 24); */
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return;
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Handle_Errors:
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scsi_lock(us_to_host(us));
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set_bit(US_FLIDX_RESETTING, &us->dflags);
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clear_bit(US_FLIDX_ABORTING, &us->dflags);
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scsi_unlock(us_to_host(us));
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mutex_unlock(&us->dev_mutex);
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result = usb_stor_port_reset(us);
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mutex_lock(&us->dev_mutex);
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if (result < 0) {
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scsi_lock(us_to_host(us));
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usb_stor_report_device_reset(us);
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scsi_unlock(us_to_host(us));
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us->transport_reset(us);
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}
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clear_bit(US_FLIDX_RESETTING, &us->dflags);
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}
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|
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/*
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* ENE_stor_invoke_transport()
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*/
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void ENE_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
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{
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int result = 0;
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/* pr_info("transport --- ENE_stor_invoke_transport\n"); */
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usb_stor_print_cmd(srb);
|
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/* send the command to the transport layer */
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scsi_set_resid(srb, 0);
|
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if (!(us->SM_Status.Ready))
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result = ENE_InitMedia(us);
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if (us->Power_IsResum == true) {
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result = ENE_InitMedia(us);
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us->Power_IsResum = false;
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}
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|
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if (us->SM_Status.Ready)
|
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result = SM_SCSIIrp(us, srb);
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|
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/* if the command gets aborted by the higher layers,
|
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we need to short-circuit all other processing */
|
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if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
|
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/* pr_info("-- command was aborted\n"); */
|
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srb->result = DID_ABORT << 16;
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goto Handle_Errors;
|
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}
|
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|
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/* if there is a transport error, reset and don't auto-sense */
|
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if (result == USB_STOR_TRANSPORT_ERROR) {
|
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/* pr_info("-- transport indicates error, resetting\n"); */
|
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srb->result = DID_ERROR << 16;
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goto Handle_Errors;
|
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}
|
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|
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/* if the transport provided its own sense data, don't auto-sense */
|
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if (result == USB_STOR_TRANSPORT_NO_SENSE) {
|
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srb->result = SAM_STAT_CHECK_CONDITION;
|
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return;
|
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}
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|
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srb->result = SAM_STAT_GOOD;
|
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if (result == USB_STOR_TRANSPORT_FAILED) {
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/* pr_info("-- transport indicates command failure\n"); */
|
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/* need_auto_sense = 1; */
|
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BuildSenseBuffer(srb, us->SrbStatus);
|
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srb->result = SAM_STAT_CHECK_CONDITION;
|
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}
|
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|
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/* Did we transfer less than the minimum amount required? */
|
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if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) -
|
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scsi_get_resid(srb) < srb->underflow)
|
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srb->result = (DID_ERROR << 16);
|
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/* v02 | (SUGGEST_RETRY << 24); */
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|
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return;
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|
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Handle_Errors:
|
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scsi_lock(us_to_host(us));
|
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set_bit(US_FLIDX_RESETTING, &us->dflags);
|
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clear_bit(US_FLIDX_ABORTING, &us->dflags);
|
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scsi_unlock(us_to_host(us));
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|
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mutex_unlock(&us->dev_mutex);
|
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result = usb_stor_port_reset(us);
|
|
mutex_lock(&us->dev_mutex);
|
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|
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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(scsi_get_resid(srb),
|
|
(int) 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;
|
|
}
|
|
|
|
|