diff options
Diffstat (limited to 'target/linux/generic-2.4/patches/228-more_usb_fixes.patch')
| -rw-r--r-- | target/linux/generic-2.4/patches/228-more_usb_fixes.patch | 861 |
1 files changed, 861 insertions, 0 deletions
diff --git a/target/linux/generic-2.4/patches/228-more_usb_fixes.patch b/target/linux/generic-2.4/patches/228-more_usb_fixes.patch new file mode 100644 index 0000000000..40b24cac0f --- /dev/null +++ b/target/linux/generic-2.4/patches/228-more_usb_fixes.patch @@ -0,0 +1,861 @@ +diff -ur linux.old/drivers/scsi/hosts.c linux.dev/drivers/scsi/hosts.c +--- linux.old/drivers/scsi/hosts.c 2003-06-13 16:51:36.000000000 +0200 ++++ linux.dev/drivers/scsi/hosts.c 2006-07-30 12:34:30.000000000 +0200 +@@ -107,8 +107,21 @@ + if (shn) shn->host_registered = 0; + /* else {} : This should not happen, we should panic here... */ + ++ /* If we are removing the last host registered, it is safe to reuse ++ * its host number (this avoids "holes" at boot time) (DB) ++ * It is also safe to reuse those of numbers directly below which have ++ * been released earlier (to avoid some holes in numbering). ++ */ ++ if(sh->host_no == max_scsi_hosts - 1) { ++ while(--max_scsi_hosts >= next_scsi_host) { ++ shpnt = scsi_hostlist; ++ while(shpnt && shpnt->host_no != max_scsi_hosts - 1) ++ shpnt = shpnt->next; ++ if(shpnt) ++ break; ++ } ++ } + next_scsi_host--; +- + kfree((char *) sh); + } + +diff -ur linux.old/drivers/usb/hcd.c linux.dev/drivers/usb/hcd.c +--- linux.old/drivers/usb/hcd.c 2004-04-14 15:05:32.000000000 +0200 ++++ linux.dev/drivers/usb/hcd.c 2006-07-30 11:49:06.000000000 +0200 +@@ -1105,7 +1105,8 @@ + break; + case PIPE_BULK: + allowed |= USB_DISABLE_SPD | USB_QUEUE_BULK +- | USB_ZERO_PACKET | URB_NO_INTERRUPT; ++ | USB_ZERO_PACKET | URB_NO_INTERRUPT ++ | URB_NO_TRANSFER_DMA_MAP; + break; + case PIPE_INTERRUPT: + allowed |= USB_DISABLE_SPD; +@@ -1212,7 +1213,8 @@ + urb->setup_packet, + sizeof (struct usb_ctrlrequest), + PCI_DMA_TODEVICE); +- if (urb->transfer_buffer_length != 0) ++ if (urb->transfer_buffer_length != 0 ++ && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) + urb->transfer_dma = pci_map_single ( + hcd->pdev, + urb->transfer_buffer, +diff -ur linux.old/drivers/usb/host/ehci-hcd.c linux.dev/drivers/usb/host/ehci-hcd.c +--- linux.old/drivers/usb/host/ehci-hcd.c 2006-07-30 11:31:57.000000000 +0200 ++++ linux.dev/drivers/usb/host/ehci-hcd.c 2006-07-30 11:48:14.000000000 +0200 +@@ -399,6 +399,27 @@ + ehci_mem_cleanup (ehci); + return retval; + } ++ ++{ ++ int misc_reg; ++ u32 vendor_id; ++ ++ pci_read_config_dword (ehci->hcd.pdev, PCI_VENDOR_ID, &vendor_id); ++ if (vendor_id == 0x31041106) { ++ /* VIA 6212 */ ++ printk(KERN_INFO "EHCI: Enabling VIA 6212 workarounds\n", misc_reg); ++ pci_read_config_byte(ehci->hcd.pdev, 0x49, &misc_reg); ++ misc_reg &= ~0x20; ++ pci_write_config_byte(ehci->hcd.pdev, 0x49, misc_reg); ++ pci_read_config_byte(ehci->hcd.pdev, 0x49, &misc_reg); ++ ++ pci_read_config_byte(ehci->hcd.pdev, 0x4b, &misc_reg); ++ misc_reg |= 0x20; ++ pci_write_config_byte(ehci->hcd.pdev, 0x4b, misc_reg); ++ pci_read_config_byte(ehci->hcd.pdev, 0x4b, &misc_reg); ++ } ++} ++ + writel (INTR_MASK, &ehci->regs->intr_enable); + writel (ehci->periodic_dma, &ehci->regs->frame_list); + +diff -ur linux.old/drivers/usb/host/ehci-q.c linux.dev/drivers/usb/host/ehci-q.c +--- linux.old/drivers/usb/host/ehci-q.c 2006-07-30 11:31:57.000000000 +0200 ++++ linux.dev/drivers/usb/host/ehci-q.c 2006-07-30 12:10:15.000000000 +0200 +@@ -791,6 +791,8 @@ + writel (cmd, &ehci->regs->command); + ehci->hcd.state = USB_STATE_RUNNING; + /* posted write need not be known to HC yet ... */ ++ ++ timer_action (ehci, TIMER_IO_WATCHDOG); + } + } + +diff -ur linux.old/drivers/usb/host/usb-uhci.c linux.dev/drivers/usb/host/usb-uhci.c +--- linux.old/drivers/usb/host/usb-uhci.c 2004-11-17 12:54:21.000000000 +0100 ++++ linux.dev/drivers/usb/host/usb-uhci.c 2006-07-30 12:10:16.000000000 +0200 +@@ -2491,7 +2491,7 @@ + ((urb_priv_t*)urb->hcpriv)->flags=0; + } + +- if ((urb->status != -ECONNABORTED) && (urb->status != ECONNRESET) && ++ if ((urb->status != -ECONNABORTED) && (urb->status != -ECONNRESET) && + (urb->status != -ENOENT)) { + + urb->status = -EINPROGRESS; +@@ -3034,6 +3034,21 @@ + + pci_set_master(dev); + ++ { ++ u8 misc_reg; ++ u32 vendor_id; ++ ++ pci_read_config_dword (dev, PCI_VENDOR_ID, &vendor_id); ++ if (vendor_id == 0x30381106) { ++ /* VIA 6212 */ ++ printk(KERN_INFO "UHCI: Enabling VIA 6212 workarounds\n"); ++ pci_read_config_byte(dev, 0x41, &misc_reg); ++ misc_reg &= ~0x10; ++ pci_write_config_byte(dev, 0x41, misc_reg); ++ pci_read_config_byte(dev, 0x41, &misc_reg); ++ } ++ } ++ + /* Search for the IO base address.. */ + for (i = 0; i < 6; i++) { + +diff -ur linux.old/drivers/usb/storage/transport.c linux.dev/drivers/usb/storage/transport.c +--- linux.old/drivers/usb/storage/transport.c 2005-04-04 03:42:19.000000000 +0200 ++++ linux.dev/drivers/usb/storage/transport.c 2006-07-30 12:22:56.000000000 +0200 +@@ -54,6 +54,22 @@ + #include <linux/sched.h> + #include <linux/errno.h> + #include <linux/slab.h> ++#include <linux/pci.h> ++#include "../hcd.h" ++ ++/* These definitions mirror those in pci.h, so they can be used ++ * interchangeably with their PCI_ counterparts */ ++enum dma_data_direction { ++ DMA_BIDIRECTIONAL = 0, ++ DMA_TO_DEVICE = 1, ++ DMA_FROM_DEVICE = 2, ++ DMA_NONE = 3, ++}; ++ ++#define dma_map_sg(d,s,n,dir) pci_map_sg(d,s,n,dir) ++#define dma_unmap_sg(d,s,n,dir) pci_unmap_sg(d,s,n,dir) ++ ++ + + /*********************************************************************** + * Helper routines +@@ -554,6 +570,543 @@ + return US_BULK_TRANSFER_SHORT; + } + ++/*-------------------------------------------------------------------*/ ++/** ++ * usb_buffer_unmap_sg - free DMA mapping(s) for a scatterlist ++ * @dev: device to which the scatterlist will be mapped ++ * @pipe: endpoint defining the mapping direction ++ * @sg: the scatterlist to unmap ++ * @n_hw_ents: the positive return value from usb_buffer_map_sg ++ * ++ * Reverses the effect of usb_buffer_map_sg(). ++ */ ++static void usb_buffer_unmap_sg (struct usb_device *dev, unsigned pipe, ++ struct scatterlist *sg, int n_hw_ents) ++{ ++ struct usb_bus *bus; ++ struct usb_hcd *hcd; ++ struct pci_dev *pdev; ++ ++ if (!dev ++ || !(bus = dev->bus) ++ || !(hcd = bus->hcpriv) ++ || !(pdev = hcd->pdev) ++ || !pdev->dma_mask) ++ return; ++ ++ dma_unmap_sg (pdev, sg, n_hw_ents, ++ usb_pipein (pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE); ++} ++ ++/** ++ * usb_buffer_map_sg - create scatterlist DMA mapping(s) for an endpoint ++ * @dev: device to which the scatterlist will be mapped ++ * @pipe: endpoint defining the mapping direction ++ * @sg: the scatterlist to map ++ * @nents: the number of entries in the scatterlist ++ * ++ * Return value is either < 0 (indicating no buffers could be mapped), or ++ * the number of DMA mapping array entries in the scatterlist. ++ * ++ * The caller is responsible for placing the resulting DMA addresses from ++ * the scatterlist into URB transfer buffer pointers, and for setting the ++ * URB_NO_TRANSFER_DMA_MAP transfer flag in each of those URBs. ++ * ++ * Top I/O rates come from queuing URBs, instead of waiting for each one ++ * to complete before starting the next I/O. This is particularly easy ++ * to do with scatterlists. Just allocate and submit one URB for each DMA ++ * mapping entry returned, stopping on the first error or when all succeed. ++ * Better yet, use the usb_sg_*() calls, which do that (and more) for you. ++ * ++ * This call would normally be used when translating scatterlist requests, ++ * rather than usb_buffer_map(), since on some hardware (with IOMMUs) it ++ * may be able to coalesce mappings for improved I/O efficiency. ++ * ++ * Reverse the effect of this call with usb_buffer_unmap_sg(). ++ */ ++static int usb_buffer_map_sg (struct usb_device *dev, unsigned pipe, ++ struct scatterlist *sg, int nents) ++{ ++ struct usb_bus *bus; ++ struct usb_hcd *hcd; ++ struct pci_dev *pdev; ++ ++ if (!dev ++ || usb_pipecontrol (pipe) ++ || !(bus = dev->bus) ++ || !(hcd = bus->hcpriv) ++ || !(pdev = hcd->pdev) ++ || !pdev->dma_mask) ++ return -1; ++ ++ // FIXME generic api broken like pci, can't report errors ++ return dma_map_sg (pdev, sg, nents, ++ usb_pipein (pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE); ++} ++ ++static void sg_clean (struct usb_sg_request *io) ++{ ++ struct usb_hcd *hcd = io->dev->bus->hcpriv; ++ struct pci_dev *pdev = hcd->pdev; ++ ++ if (io->urbs) { ++ while (io->entries--) ++ usb_free_urb (io->urbs [io->entries]); ++ kfree (io->urbs); ++ io->urbs = 0; ++ } ++ if (pdev->dma_mask != 0) ++ usb_buffer_unmap_sg (io->dev, io->pipe, io->sg, io->nents); ++ io->dev = 0; ++} ++ ++static void sg_complete (struct urb *urb) ++{ ++ struct usb_sg_request *io = (struct usb_sg_request *) urb->context; ++ ++ spin_lock (&io->lock); ++ ++ /* In 2.5 we require hcds' endpoint queues not to progress after fault ++ * reports, until the completion callback (this!) returns. That lets ++ * device driver code (like this routine) unlink queued urbs first, ++ * if it needs to, since the HC won't work on them at all. So it's ++ * not possible for page N+1 to overwrite page N, and so on. ++ * ++ * That's only for "hard" faults; "soft" faults (unlinks) sometimes ++ * complete before the HCD can get requests away from hardware, ++ * though never during cleanup after a hard fault. ++ */ ++ if (io->status ++ && (io->status != -ECONNRESET ++ || urb->status != -ECONNRESET) ++ && urb->actual_length) { ++ US_DEBUGP("Error: %s ep%d%s scatterlist error %d/%d\n", ++ io->dev->devpath, ++ usb_pipeendpoint (urb->pipe), ++ usb_pipein (urb->pipe) ? "in" : "out", ++ urb->status, io->status); ++ // BUG (); ++ } ++ ++ if (urb->status && urb->status != -ECONNRESET) { ++ int i, found, status; ++ ++ io->status = urb->status; ++ ++ /* the previous urbs, and this one, completed already. ++ * unlink pending urbs so they won't rx/tx bad data. ++ */ ++ for (i = 0, found = 0; i < io->entries; i++) { ++ if (!io->urbs [i]) ++ continue; ++ if (found) { ++ status = usb_unlink_urb (io->urbs [i]); ++ if (status != -EINPROGRESS && status != -EBUSY) ++ US_DEBUGP("Error: %s, unlink --> %d\n", __FUNCTION__, status); ++ } else if (urb == io->urbs [i]) ++ found = 1; ++ } ++ } ++ urb->dev = 0; ++ ++ /* on the last completion, signal usb_sg_wait() */ ++ io->bytes += urb->actual_length; ++ io->count--; ++ if (!io->count) ++ complete (&io->complete); ++ ++ spin_unlock (&io->lock); ++} ++ ++/** ++ * usb_sg_init - initializes scatterlist-based bulk/interrupt I/O request ++ * @io: request block being initialized. until usb_sg_wait() returns, ++ * treat this as a pointer to an opaque block of memory, ++ * @dev: the usb device that will send or receive the data ++ * @pipe: endpoint "pipe" used to transfer the data ++ * @period: polling rate for interrupt endpoints, in frames or ++ * (for high speed endpoints) microframes; ignored for bulk ++ * @sg: scatterlist entries ++ * @nents: how many entries in the scatterlist ++ * @length: how many bytes to send from the scatterlist, or zero to ++ * send every byte identified in the list. ++ * @mem_flags: SLAB_* flags affecting memory allocations in this call ++ * ++ * Returns zero for success, else a negative errno value. This initializes a ++ * scatter/gather request, allocating resources such as I/O mappings and urb ++ * memory (except maybe memory used by USB controller drivers). ++ * ++ * The request must be issued using usb_sg_wait(), which waits for the I/O to ++ * complete (or to be canceled) and then cleans up all resources allocated by ++ * usb_sg_init(). ++ * ++ * The request may be canceled with usb_sg_cancel(), either before or after ++ * usb_sg_wait() is called. ++ */ ++int usb_sg_init ( ++ struct usb_sg_request *io, ++ struct usb_device *dev, ++ unsigned pipe, ++ unsigned period, ++ struct scatterlist *sg, ++ int nents, ++ size_t length, ++ int mem_flags ++) ++{ ++ int i; ++ int urb_flags; ++ int dma; ++ struct usb_hcd *hcd; ++ ++ hcd = dev->bus->hcpriv; ++ ++ if (!io || !dev || !sg ++ || usb_pipecontrol (pipe) ++ || usb_pipeisoc (pipe) ++ || nents <= 0) ++ return -EINVAL; ++ ++ spin_lock_init (&io->lock); ++ io->dev = dev; ++ io->pipe = pipe; ++ io->sg = sg; ++ io->nents = nents; ++ ++ /* not all host controllers use DMA (like the mainstream pci ones); ++ * they can use PIO (sl811) or be software over another transport. ++ */ ++ dma = (hcd->pdev->dma_mask != 0); ++ if (dma) ++ io->entries = usb_buffer_map_sg (dev, pipe, sg, nents); ++ else ++ io->entries = nents; ++ ++ /* initialize all the urbs we'll use */ ++ if (io->entries <= 0) ++ return io->entries; ++ ++ io->count = 0; ++ io->urbs = kmalloc (io->entries * sizeof *io->urbs, mem_flags); ++ if (!io->urbs) ++ goto nomem; ++ ++ urb_flags = USB_ASYNC_UNLINK | URB_NO_INTERRUPT | URB_NO_TRANSFER_DMA_MAP; ++ if (usb_pipein (pipe)) ++ urb_flags |= URB_SHORT_NOT_OK; ++ ++ for (i = 0; i < io->entries; i++, io->count = i) { ++ unsigned len; ++ ++ io->urbs [i] = usb_alloc_urb (0); ++ if (!io->urbs [i]) { ++ io->entries = i; ++ goto nomem; ++ } ++ ++ io->urbs [i]->dev = 0; ++ io->urbs [i]->pipe = pipe; ++ io->urbs [i]->interval = period; ++ io->urbs [i]->transfer_flags = urb_flags; ++ ++ io->urbs [i]->complete = sg_complete; ++ io->urbs [i]->context = io; ++ io->urbs [i]->status = -EINPROGRESS; ++ io->urbs [i]->actual_length = 0; ++ ++ if (dma) { ++ /* hc may use _only_ transfer_dma */ ++ io->urbs [i]->transfer_dma = sg_dma_address (sg + i); ++ len = sg_dma_len (sg + i); ++ } else { ++ /* hc may use _only_ transfer_buffer */ ++ io->urbs [i]->transfer_buffer = ++ page_address (sg [i].page) + sg [i].offset; ++ len = sg [i].length; ++ } ++ ++ if (length) { ++ len = min_t (unsigned, len, length); ++ length -= len; ++ if (length == 0) ++ io->entries = i + 1; ++ } ++ io->urbs [i]->transfer_buffer_length = len; ++ } ++ io->urbs [--i]->transfer_flags &= ~URB_NO_INTERRUPT; ++ ++ /* transaction state */ ++ io->status = 0; ++ io->bytes = 0; ++ init_completion (&io->complete); ++ return 0; ++ ++nomem: ++ sg_clean (io); ++ return -ENOMEM; ++} ++ ++/** ++ * usb_sg_cancel - stop scatter/gather i/o issued by usb_sg_wait() ++ * @io: request block, initialized with usb_sg_init() ++ * ++ * This stops a request after it has been started by usb_sg_wait(). ++ * It can also prevents one initialized by usb_sg_init() from starting, ++ * so that call just frees resources allocated to the request. ++ */ ++void usb_sg_cancel (struct usb_sg_request *io) ++{ ++ unsigned long flags; ++ ++ spin_lock_irqsave (&io->lock, flags); ++ ++ /* shut everything down, if it didn't already */ ++ if (!io->status) { ++ int i; ++ ++ io->status = -ECONNRESET; ++ for (i = 0; i < io->entries; i++) { ++ int retval; ++ ++ if (!io->urbs [i]->dev) ++ continue; ++ retval = usb_unlink_urb (io->urbs [i]); ++ if (retval != -EINPROGRESS && retval != -EBUSY) ++ US_DEBUGP("WARNING: %s, unlink --> %d\n", __FUNCTION__, retval); ++ } ++ } ++ spin_unlock_irqrestore (&io->lock, flags); ++} ++ ++/** ++ * usb_sg_wait - synchronously execute scatter/gather request ++ * @io: request block handle, as initialized with usb_sg_init(). ++ * some fields become accessible when this call returns. ++ * Context: !in_interrupt () ++ * ++ * This function blocks until the specified I/O operation completes. It ++ * leverages the grouping of the related I/O requests to get good transfer ++ * rates, by queueing the requests. At higher speeds, such queuing can ++ * significantly improve USB throughput. ++ * ++ * There are three kinds of completion for this function. ++ * (1) success, where io->status is zero. The number of io->bytes ++ * transferred is as requested. ++ * (2) error, where io->status is a negative errno value. The number ++ * of io->bytes transferred before the error is usually less ++ * than requested, and can be nonzero. ++ * (3) cancelation, a type of error with status -ECONNRESET that ++ * is initiated by usb_sg_cancel(). ++ * ++ * When this function returns, all memory allocated through usb_sg_init() or ++ * this call will have been freed. The request block parameter may still be ++ * passed to usb_sg_cancel(), or it may be freed. It could also be ++ * reinitialized and then reused. ++ * ++ * Data Transfer Rates: ++ * ++ * Bulk transfers are valid for full or high speed endpoints. ++ * The best full speed data rate is 19 packets of 64 bytes each ++ * per frame, or 1216 bytes per millisecond. ++ * The best high speed data rate is 13 packets of 512 bytes each ++ * per microframe, or 52 KBytes per millisecond. ++ * ++ * The reason to use interrupt transfers through this API would most likely ++ * be to reserve high speed bandwidth, where up to 24 KBytes per millisecond ++ * could be transferred. That capability is less useful for low or full ++ * speed interrupt endpoints, which allow at most one packet per millisecond, ++ * of at most 8 or 64 bytes (respectively). ++ */ ++void usb_sg_wait (struct usb_sg_request *io) ++{ ++ int i, entries = io->entries; ++ ++ /* queue the urbs. */ ++ spin_lock_irq (&io->lock); ++ for (i = 0; i < entries && !io->status; i++) { ++ int retval; ++ ++ io->urbs [i]->dev = io->dev; ++ retval = usb_submit_urb (io->urbs [i]); ++ ++ /* after we submit, let completions or cancelations fire; ++ * we handshake using io->status. ++ */ ++ spin_unlock_irq (&io->lock); ++ switch (retval) { ++ /* maybe we retrying will recover */ ++ case -ENXIO: // hc didn't queue this one ++ case -EAGAIN: ++ case -ENOMEM: ++ io->urbs [i]->dev = 0; ++ retval = 0; ++ i--; ++ yield (); ++ break; ++ ++ /* no error? continue immediately. ++ * ++ * NOTE: to work better with UHCI (4K I/O buffer may ++ * need 3K of TDs) it may be good to limit how many ++ * URBs are queued at once; N milliseconds? ++ */ ++ case 0: ++ cpu_relax (); ++ break; ++ ++ /* fail any uncompleted urbs */ ++ default: ++ spin_lock_irq (&io->lock); ++ io->count -= entries - i; ++ if (io->status == -EINPROGRESS) ++ io->status = retval; ++ if (io->count == 0) ++ complete (&io->complete); ++ spin_unlock_irq (&io->lock); ++ ++ io->urbs [i]->dev = 0; ++ io->urbs [i]->status = retval; ++ ++ US_DEBUGP("%s, submit --> %d\n", __FUNCTION__, retval); ++ usb_sg_cancel (io); ++ } ++ spin_lock_irq (&io->lock); ++ if (retval && io->status == -ECONNRESET) ++ io->status = retval; ++ } ++ spin_unlock_irq (&io->lock); ++ ++ /* OK, yes, this could be packaged as non-blocking. ++ * So could the submit loop above ... but it's easier to ++ * solve neither problem than to solve both! ++ */ ++ wait_for_completion (&io->complete); ++ ++ sg_clean (io); ++} ++ ++/* ++ * Interpret the results of a URB transfer ++ * ++ * This function prints appropriate debugging messages, clears halts on ++ * non-control endpoints, and translates the status to the corresponding ++ * USB_STOR_XFER_xxx return code. ++ */ ++static int interpret_urb_result(struct us_data *us, unsigned int pipe, ++ unsigned int length, int result, unsigned int partial) ++{ ++ US_DEBUGP("Status code %d; transferred %u/%u\n", ++ result, partial, length); ++ switch (result) { ++ ++ /* no error code; did we send all the data? */ ++ case 0: ++ if (partial != length) { ++ US_DEBUGP("-- short transfer\n"); ++ return USB_STOR_XFER_SHORT; ++ } ++ ++ US_DEBUGP("-- transfer complete\n"); ++ return USB_STOR_XFER_GOOD; ++ ++ /* stalled */ ++ case -EPIPE: ++ /* for control endpoints, (used by CB[I]) a stall indicates ++ * a failed command */ ++ if (usb_pipecontrol(pipe)) { ++ US_DEBUGP("-- stall on control pipe\n"); ++ return USB_STOR_XFER_STALLED; ++ } ++ ++ /* for other sorts of endpoint, clear the stall */ ++ US_DEBUGP("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; ++ ++ /* timeout or excessively long NAK */ ++ case -ETIMEDOUT: ++ US_DEBUGP("-- timeout or NAK\n"); ++ return USB_STOR_XFER_ERROR; ++ ++ /* babble - the device tried to send more than we wanted to read */ ++ case -EOVERFLOW: ++ US_DEBUGP("-- babble\n"); ++ return USB_STOR_XFER_LONG; ++ ++ /* the transfer was cancelled by abort, disconnect, or timeout */ ++ case -ECONNRESET: ++ US_DEBUGP("-- transfer cancelled\n"); ++ return USB_STOR_XFER_ERROR; ++ ++ /* short scatter-gather read transfer */ ++ case -EREMOTEIO: ++ US_DEBUGP("-- short read transfer\n"); ++ return USB_STOR_XFER_SHORT; ++ ++ /* abort or disconnect in progress */ ++ case -EIO: ++ US_DEBUGP("-- abort or disconnect in progress\n"); ++ return USB_STOR_XFER_ERROR; ++ ++ /* the catch-all error case */ ++ default: ++ US_DEBUGP("-- unknown error\n"); ++ return USB_STOR_XFER_ERROR; ++ } ++} ++ ++/* ++ * Transfer a scatter-gather list via bulk transfer ++ * ++ * This function does basically the same thing as usb_stor_bulk_msg() ++ * above, but it uses the usbcore scatter-gather library. ++ */ ++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; ++ ++ /* don't submit s-g requests during abort/disconnect processing */ ++ if (us->flags & ABORTING_OR_DISCONNECTING) ++ return USB_STOR_XFER_ERROR; ++ ++ /* initialize the scatter-gather request block */ ++ US_DEBUGP("%s: xfer %u bytes, %d entries\n", __FUNCTION__, ++ length, num_sg); ++ result = usb_sg_init(&us->current_sg, us->pusb_dev, pipe, 0, ++ sg, num_sg, length, SLAB_NOIO); ++ if (result) { ++ US_DEBUGP("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->flags); ++ ++ /* did an abort/disconnect occur during the submission? */ ++ if (us->flags & ABORTING_OR_DISCONNECTING) { ++ ++ /* cancel the request, if it hasn't been cancelled already */ ++ if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->flags)) { ++ US_DEBUGP("-- 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->flags); ++ ++ 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); ++} ++ + /* + * Transfer an entire SCSI command's worth of data payload over the bulk + * pipe. +@@ -569,6 +1122,8 @@ + struct scatterlist *sg; + unsigned int total_transferred = 0; + unsigned int transfer_amount; ++ unsigned int partial; ++ unsigned int pipe; + + /* calculate how much we want to transfer */ + transfer_amount = usb_stor_transfer_length(srb); +@@ -585,23 +1140,34 @@ + * make the appropriate requests for each, until done + */ + sg = (struct scatterlist *) srb->request_buffer; +- for (i = 0; i < srb->use_sg; i++) { +- +- /* transfer the lesser of the next buffer or the +- * remaining data */ +- if (transfer_amount - total_transferred >= +- sg[i].length) { +- result = usb_stor_transfer_partial(us, +- sg[i].address, sg[i].length); +- total_transferred += sg[i].length; +- } else +- result = usb_stor_transfer_partial(us, +- sg[i].address, +- transfer_amount - total_transferred); +- +- /* if we get an error, end the loop here */ +- if (result) +- break; ++ if (us->pusb_dev->speed == USB_SPEED_HIGH) { ++ /* calculate the appropriate pipe information */ ++ if (us->srb->sc_data_direction == SCSI_DATA_READ) ++ pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in); ++ else ++ pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out); ++ /* use the usb core scatter-gather primitives */ ++ result = usb_stor_bulk_transfer_sglist(us, pipe, ++ sg, srb->use_sg, transfer_amount, &partial); ++ } else { ++ for (i = 0; i < srb->use_sg; i++) { ++ ++ /* transfer the lesser of the next buffer or the ++ * remaining data */ ++ if (transfer_amount - total_transferred >= ++ sg[i].length) { ++ result = usb_stor_transfer_partial(us, ++ sg[i].address, sg[i].length); ++ total_transferred += sg[i].length; ++ } else ++ result = usb_stor_transfer_partial(us, ++ sg[i].address, ++ transfer_amount - total_transferred); ++ ++ /* if we get an error, end the loop here */ ++ if (result) ++ break; ++ } + } + } + else +diff -ur linux.old/drivers/usb/storage/transport.h linux.dev/drivers/usb/storage/transport.h +--- linux.old/drivers/usb/storage/transport.h 2003-08-25 13:44:42.000000000 +0200 ++++ linux.dev/drivers/usb/storage/transport.h 2006-07-30 12:10:16.000000000 +0200 +@@ -127,6 +127,16 @@ + #define US_BULK_TRANSFER_ABORTED 3 /* transfer canceled */ + + /* ++ * usb_stor_bulk_transfer_xxx() return codes, in order of severity ++ */ ++ ++#define USB_STOR_XFER_GOOD 0 /* good transfer */ ++#define USB_STOR_XFER_SHORT 1 /* transferred less than expected */ ++#define USB_STOR_XFER_STALLED 2 /* endpoint stalled */ ++#define USB_STOR_XFER_LONG 3 /* device tried to send too much */ ++#define USB_STOR_XFER_ERROR 4 /* transfer died in the middle */ ++ ++/* + * Transport return codes + */ + +diff -ur linux.old/drivers/usb/storage/usb.h linux.dev/drivers/usb/storage/usb.h +--- linux.old/drivers/usb/storage/usb.h 2005-04-04 03:42:20.000000000 +0200 ++++ linux.dev/drivers/usb/storage/usb.h 2006-07-30 12:11:06.000000000 +0200 +@@ -111,6 +111,60 @@ + typedef void (*proto_cmnd)(Scsi_Cmnd*, struct us_data*); + typedef void (*extra_data_destructor)(void *); /* extra data destructor */ + ++/* Dynamic flag definitions: used in set_bit() etc. */ ++#define US_FLIDX_URB_ACTIVE 18 /* 0x00040000 current_urb is in use */ ++#define US_FLIDX_SG_ACTIVE 19 /* 0x00080000 current_sg is in use */ ++#define US_FLIDX_ABORTING 20 /* 0x00100000 abort is in progress */ ++#define US_FLIDX_DISCONNECTING 21 /* 0x00200000 disconnect in progress */ ++#define ABORTING_OR_DISCONNECTING ((1UL << US_FLIDX_ABORTING) | \ ++ (1UL << US_FLIDX_DISCONNECTING)) ++#define US_FLIDX_RESETTING 22 /* 0x00400000 device reset in progress */ ++ ++/* processing state machine states */ ++#define US_STATE_IDLE 1 ++#define US_STATE_RUNNING 2 ++#define US_STATE_RESETTING 3 ++#define US_STATE_ABORTING 4 ++ ++/** ++ * struct usb_sg_request - support for scatter/gather I/O ++ * @status: zero indicates success, else negative errno ++ * @bytes: counts bytes transferred. ++ * ++ * These requests are initialized using usb_sg_init(), and then are used ++ * as request handles passed to usb_sg_wait() or usb_sg_cancel(). Most ++ * members of the request object aren't for driver access. ++ * ++ * The status and bytecount values are valid only after usb_sg_wait() ++ * returns. If the status is zero, then the bytecount matches the total ++ * from the request. ++ * ++ * After an error completion, drivers may need to clear a halt condition ++ * on the endpoint. ++ */ ++struct usb_sg_request { ++ int status; ++ size_t bytes; ++ ++ /* ++ * members below are private to usbcore, ++ * and are not provided for driver access! ++ */ ++ spinlock_t lock; ++ ++ struct usb_device *dev; ++ int pipe; ++ struct scatterlist *sg; ++ int nents; ++ ++ int entries; ++ struct urb **urbs; ++ ++ int count; ++ struct completion complete; ++}; ++ ++ + /* we allocate one of these for every device that we remember */ + struct us_data { + struct us_data *next; /* next device */ +@@ -171,6 +225,7 @@ + struct urb *current_urb; /* non-int USB requests */ + struct completion current_done; /* the done flag */ + unsigned int tag; /* tag for bulk CBW/CSW */ ++ struct usb_sg_request current_sg; /* scatter-gather req. */ + + /* the semaphore for sleeping the control thread */ + struct semaphore sema; /* to sleep thread on */ +diff -ur linux.old/include/linux/usb.h linux.dev/include/linux/usb.h +--- linux.old/include/linux/usb.h 2004-11-17 12:54:22.000000000 +0100 ++++ linux.dev/include/linux/usb.h 2006-07-30 12:19:19.000000000 +0200 +@@ -483,6 +483,8 @@ + #define URB_NO_INTERRUPT 0x0080 /* HINT: no non-error interrupt needed */ + /* ... less overhead for QUEUE_BULK */ + #define USB_TIMEOUT_KILLED 0x1000 // only set by HCD! ++#define URB_NO_TRANSFER_DMA_MAP 0x0400 /* urb->transfer_dma valid on submit */ ++#define URB_NO_SETUP_DMA_MAP 0x0800 /* urb->setup_dma valid on submit */ + + struct iso_packet_descriptor + { |