From: Luca Ellero Date: Thu, 10 Jul 2014 09:01:49 +0000 (+0200) Subject: staging: ced1401: rename members of struct transarea X-Git-Tag: firefly_0821_release~176^2~3491^2~1022 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3d50f62ae395dd51a4c9613a849bc783abc7f4c1;p=firefly-linux-kernel-4.4.55.git staging: ced1401: rename members of struct transarea Rename members with CamelCase and Hungarian notation Signed-off-by: Luca Ellero Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/ced1401/ced_ioc.c b/drivers/staging/ced1401/ced_ioc.c index 20acda2f2ea8..2eb1eb9ede65 100644 --- a/drivers/staging/ced1401/ced_ioc.c +++ b/drivers/staging/ced1401/ced_ioc.c @@ -595,7 +595,7 @@ int ced_clear_area(struct ced_data *ced, int nArea) } else { /* to save typing */ struct transarea *pTA = &ced->rTransDef[nArea]; - if (!pTA->bUsed) /* if not used... */ + if (!pTA->used) /* if not used... */ iReturn = U14ERR_NOTSET; /* ...nothing to be done */ else { /* We must save the memory we return as we shouldn't mess with memory while */ @@ -614,17 +614,17 @@ int ced_clear_area(struct ced_data *ced, int nArea) "%s: call on area %d while active\n", __func__, nArea); } else { - pPages = pTA->pPages; /* save page address list */ - nPages = pTA->nPages; /* and page count */ - if (pTA->dwEventSz) /* if events flagging in use */ - wake_up_interruptible(&pTA->wqEvent); /* release anything that was waiting */ + pPages = pTA->pages; /* save page address list */ + nPages = pTA->n_pages; /* and page count */ + if (pTA->event_sz) /* if events flagging in use */ + wake_up_interruptible(&pTA->event); /* release anything that was waiting */ if (ced->bXFerWaiting && (ced->rDMAInfo.wIdent == nArea)) ced->bXFerWaiting = false; /* Cannot have pending xfer if area cleared */ /* Clean out the struct transarea except for the wait queue, which is at the end */ - /* This sets bUsed to false and dwEventSz to 0 to say area not used and no events. */ + /* This sets used to false and event_sz to 0 to say area not used and no events. */ memset(pTA, 0, sizeof(struct transarea) - sizeof(wait_queue_head_t)); @@ -701,20 +701,20 @@ static int ced_set_area(struct ced_data *ced, int nArea, char __user *puBuf, /* kmap() or kmap_atomic() to get a virtual address. page_address will give you */ /* (null) or at least it does in this context with an x86 machine. */ spin_lock_irq(&ced->stagedLock); - pTA->lpvBuff = puBuf; /* keep start of region (user address) */ - pTA->dwBaseOffset = ulOffset; /* save offset in first page to start of xfer */ - pTA->dwLength = dwLength; /* Size if the region in bytes */ - pTA->pPages = pPages; /* list of pages that are used by buffer */ - pTA->nPages = nPages; /* number of pages */ + pTA->buff = puBuf; /* keep start of region (user address) */ + pTA->base_offset = ulOffset; /* save offset in first page to start of xfer */ + pTA->length = dwLength; /* Size if the region in bytes */ + pTA->pages = pPages; /* list of pages that are used by buffer */ + pTA->n_pages = nPages; /* number of pages */ - pTA->bCircular = bCircular; - pTA->bCircToHost = bCircToHost; + pTA->circular = bCircular; + pTA->circ_to_host = bCircToHost; - pTA->aBlocks[0].offset = 0; - pTA->aBlocks[0].size = 0; - pTA->aBlocks[1].offset = 0; - pTA->aBlocks[1].size = 0; - pTA->bUsed = true; /* This is now a used block */ + pTA->blocks[0].offset = 0; + pTA->blocks[0].size = 0; + pTA->blocks[1].offset = 0; + pTA->blocks[1].size = 0; + pTA->used = true; /* This is now a used block */ spin_unlock_irq(&ced->stagedLock); iReturn = U14ERR_NOERROR; /* say all was well */ @@ -795,11 +795,11 @@ int ced_set_event(struct ced_data *ced, struct transfer_event __user *pTE) struct transarea *pTA = &ced->rTransDef[te.wAreaNum]; mutex_lock(&ced->io_mutex); /* make sure we have no competitor */ spin_lock_irq(&ced->stagedLock); - if (pTA->bUsed) { /* area must be in use */ - pTA->dwEventSt = te.dwStart; /* set area regions */ - pTA->dwEventSz = te.dwLength; /* set size (0 cancels it) */ - pTA->bEventToHost = te.wFlags & 1; /* set the direction */ - pTA->iWakeUp = 0; /* zero the wake up count */ + if (pTA->used) { /* area must be in use */ + pTA->event_st = te.dwStart; /* set area regions */ + pTA->event_sz = te.dwLength; /* set size (0 cancels it) */ + pTA->event_to_host = te.wFlags & 1; /* set the direction */ + pTA->wake_up = 0; /* zero the wake up count */ } else iReturn = U14ERR_NOTSET; spin_unlock_irq(&ced->stagedLock); @@ -830,27 +830,27 @@ int ced_wait_event(struct ced_data *ced, int nArea, int msTimeOut) /* releasing it and the wait call. However, this would have to clear the */ /* iWakeUp flag. However, the !pTA-bUsed may help us in this case. */ mutex_lock(&ced->io_mutex); /* make sure we have no competitor */ - if (!pTA->bUsed || !pTA->dwEventSz) /* check something to wait for... */ + if (!pTA->used || !pTA->event_sz) /* check something to wait for... */ return U14ERR_NOTSET; /* ...else we do nothing */ mutex_unlock(&ced->io_mutex); if (msTimeOut) iWait = - wait_event_interruptible_timeout(pTA->wqEvent, - pTA->iWakeUp - || !pTA->bUsed, + wait_event_interruptible_timeout(pTA->event, + pTA->wake_up + || !pTA->used, msTimeOut); else iWait = - wait_event_interruptible(pTA->wqEvent, pTA->iWakeUp - || !pTA->bUsed); + wait_event_interruptible(pTA->event, pTA->wake_up + || !pTA->used); if (iWait) iReturn = -ERESTARTSYS; /* oops - we have had a SIGNAL */ else - iReturn = pTA->iWakeUp; /* else the wakeup count */ + iReturn = pTA->wake_up; /* else the wakeup count */ spin_lock_irq(&ced->stagedLock); - pTA->iWakeUp = 0; /* clear the flag */ + pTA->wake_up = 0; /* clear the flag */ spin_unlock_irq(&ced->stagedLock); } return iReturn; @@ -871,8 +871,8 @@ int ced_test_event(struct ced_data *ced, int nArea) struct transarea *pTA = &ced->rTransDef[nArea]; mutex_lock(&ced->io_mutex); /* make sure we have no competitor */ spin_lock_irq(&ced->stagedLock); - iReturn = pTA->iWakeUp; /* get wakeup count since last call */ - pTA->iWakeUp = 0; /* clear the count */ + iReturn = pTA->wake_up; /* get wakeup count since last call */ + pTA->wake_up = 0; /* clear the count */ spin_unlock_irq(&ced->stagedLock); mutex_unlock(&ced->io_mutex); } @@ -901,8 +901,8 @@ int ced_get_transfer(struct ced_data *ced, TGET_TX_BLOCK __user *pTX) mutex_unlock(&ced->io_mutex); return -ENOMEM; } - tx->size = ced->rTransDef[dwIdent].dwLength; - tx->linear = (long long)((long)ced->rTransDef[dwIdent].lpvBuff); + tx->size = ced->rTransDef[dwIdent].length; + tx->linear = (long long)((long)ced->rTransDef[dwIdent].buff); tx->avail = GET_TX_MAXENTRIES; /* how many blocks we could return */ tx->used = 1; /* number we actually return */ tx->entries[0].physical = @@ -1359,11 +1359,11 @@ int ced_get_circ_block(struct ced_data *ced, TCIRCBLOCK __user *pCB) struct transarea *pArea = &ced->rTransDef[nArea]; spin_lock_irq(&ced->stagedLock); /* Lock others out */ - if ((pArea->bUsed) && (pArea->bCircular) && /* Must be circular area */ - (pArea->bCircToHost)) { /* For now at least must be to host */ - if (pArea->aBlocks[0].size > 0) { /* Got anything? */ - cb.dwOffset = pArea->aBlocks[0].offset; - cb.dwSize = pArea->aBlocks[0].size; + if ((pArea->used) && (pArea->circular) && /* Must be circular area */ + (pArea->circ_to_host)) { /* For now at least must be to host */ + if (pArea->blocks[0].size > 0) { /* Got anything? */ + cb.dwOffset = pArea->blocks[0].offset; + cb.dwSize = pArea->blocks[0].size; dev_dbg(&ced->interface->dev, "%s: return block 0: %d bytes at %d\n", __func__, cb.dwSize, cb.dwOffset); @@ -1411,35 +1411,35 @@ int ced_free_circ_block(struct ced_data *ced, TCIRCBLOCK __user *pCB) struct transarea *pArea = &ced->rTransDef[nArea]; spin_lock_irq(&ced->stagedLock); /* Lock others out */ - if ((pArea->bUsed) && (pArea->bCircular) && /* Must be circular area */ - (pArea->bCircToHost)) { /* For now at least must be to host */ + if ((pArea->used) && (pArea->circular) && /* Must be circular area */ + (pArea->circ_to_host)) { /* For now at least must be to host */ bool bWaiting = false; - if ((pArea->aBlocks[0].size >= uSize) && /* Got anything? */ - (pArea->aBlocks[0].offset == uStart)) { /* Must be legal data */ - pArea->aBlocks[0].size -= uSize; - pArea->aBlocks[0].offset += uSize; - if (pArea->aBlocks[0].size == 0) { /* Have we emptied this block? */ - if (pArea->aBlocks[1].size) { /* Is there a second block? */ - pArea->aBlocks[0] = pArea->aBlocks[1]; /* Copy down block 2 data */ - pArea->aBlocks[1].size = 0; /* and mark the second block as unused */ - pArea->aBlocks[1].offset = 0; + if ((pArea->blocks[0].size >= uSize) && /* Got anything? */ + (pArea->blocks[0].offset == uStart)) { /* Must be legal data */ + pArea->blocks[0].size -= uSize; + pArea->blocks[0].offset += uSize; + if (pArea->blocks[0].size == 0) { /* Have we emptied this block? */ + if (pArea->blocks[1].size) { /* Is there a second block? */ + pArea->blocks[0] = pArea->blocks[1]; /* Copy down block 2 data */ + pArea->blocks[1].size = 0; /* and mark the second block as unused */ + pArea->blocks[1].offset = 0; } else - pArea->aBlocks[0].offset = 0; + pArea->blocks[0].offset = 0; } dev_dbg(&ced->interface->dev, "%s: free %d bytes at %d, return %d bytes at %d, wait=%d\n", __func__, uSize, uStart, - pArea->aBlocks[0].size, - pArea->aBlocks[0].offset, + pArea->blocks[0].size, + pArea->blocks[0].offset, ced->bXFerWaiting); /* Return the next available block of memory as well */ - if (pArea->aBlocks[0].size > 0) { /* Got anything? */ + if (pArea->blocks[0].size > 0) { /* Got anything? */ cb.dwOffset = - pArea->aBlocks[0].offset; - cb.dwSize = pArea->aBlocks[0].size; + pArea->blocks[0].offset; + cb.dwSize = pArea->blocks[0].size; } bWaiting = ced->bXFerWaiting; @@ -1453,8 +1453,8 @@ int ced_free_circ_block(struct ced_data *ced, TCIRCBLOCK __user *pCB) dev_err(&ced->interface->dev, "%s: ERROR: freeing %d bytes at %d, block 0 is %d bytes at %d\n", __func__, uSize, uStart, - pArea->aBlocks[0].size, - pArea->aBlocks[0].offset); + pArea->blocks[0].size, + pArea->blocks[0].offset); iReturn = U14ERR_NOMEMORY; } diff --git a/drivers/staging/ced1401/usb1401.c b/drivers/staging/ced1401/usb1401.c index 0d3abc25ce33..17f2be5254d3 100644 --- a/drivers/staging/ced1401/usb1401.c +++ b/drivers/staging/ced1401/usb1401.c @@ -444,9 +444,9 @@ static void ced_copy_user_space(struct ced_data *ced, int n) /* area to be used */ struct transarea *pArea = &ced->rTransDef[nArea]; unsigned int dwOffset = - ced->StagedDone + ced->StagedOffset + pArea->dwBaseOffset; + ced->StagedDone + ced->StagedOffset + pArea->base_offset; char *pCoherBuf = ced->pCoherStagedIO; /* coherent buffer */ - if (!pArea->bUsed) { + if (!pArea->used) { dev_err(&ced->interface->dev, "%s: area %d unused\n", __func__, nArea); return; @@ -454,9 +454,9 @@ static void ced_copy_user_space(struct ced_data *ced, int n) while (n) { int nPage = dwOffset >> PAGE_SHIFT; /* page number in table */ - if (nPage < pArea->nPages) { + if (nPage < pArea->n_pages) { char *pvAddress = - (char *)kmap_atomic(pArea->pPages[nPage]); + (char *)kmap_atomic(pArea->pages[nPage]); if (pvAddress) { unsigned int uiPageOff = dwOffset & (PAGE_SIZE - 1); /* offset into the page */ size_t uiXfer = PAGE_SIZE - uiPageOff; /* max to transfer on this page */ @@ -552,64 +552,64 @@ static void staged_callback(struct urb *pUrb) /* a completed transfer that can be assumed to fit into the transfer area. We should be able to */ /* add this to the end of a growing block or to use it to start a new block unless the code */ /* that calculates the offset to use (in ced_read_write_mem) is totally duff. */ - if ((pArea->bCircular) && (pArea->bCircToHost) && (!bCancel) && /* Time to sort out circular buffer info? */ + if ((pArea->circular) && (pArea->circ_to_host) && (!bCancel) && /* Time to sort out circular buffer info? */ (ced->StagedRead)) { /* Only for tohost transfers for now */ - if (pArea->aBlocks[1].size > 0) { /* If block 1 is in use we must append to it */ + if (pArea->blocks[1].size > 0) { /* If block 1 is in use we must append to it */ if (ced->StagedOffset == - (pArea->aBlocks[1].offset + - pArea->aBlocks[1].size)) { - pArea->aBlocks[1].size += + (pArea->blocks[1].offset + + pArea->blocks[1].size)) { + pArea->blocks[1].size += ced->StagedLength; dev_dbg(&ced->interface->dev, "RWM_Complete, circ block 1 now %d bytes at %d\n", - pArea->aBlocks[1].size, - pArea->aBlocks[1].offset); + pArea->blocks[1].size, + pArea->blocks[1].offset); } else { /* Here things have gone very, very, wrong, but I cannot see how this can actually be achieved */ - pArea->aBlocks[1].offset = + pArea->blocks[1].offset = ced->StagedOffset; - pArea->aBlocks[1].size = + pArea->blocks[1].size = ced->StagedLength; dev_err(&ced->interface->dev, "%s: ERROR, circ block 1 re-started %d bytes at %d\n", __func__, - pArea->aBlocks[1].size, - pArea->aBlocks[1].offset); + pArea->blocks[1].size, + pArea->blocks[1].offset); } } else { /* If block 1 is not used, we try to add to block 0 */ - if (pArea->aBlocks[0].size > 0) { /* Got stored block 0 information? */ + if (pArea->blocks[0].size > 0) { /* Got stored block 0 information? */ /* Must append onto the existing block 0 */ if (ced->StagedOffset == - (pArea->aBlocks[0].offset + - pArea->aBlocks[0].size)) { - pArea->aBlocks[0].size += ced->StagedLength; /* Just add this transfer in */ + (pArea->blocks[0].offset + + pArea->blocks[0].size)) { + pArea->blocks[0].size += ced->StagedLength; /* Just add this transfer in */ dev_dbg(&ced->interface->dev, "RWM_Complete, circ block 0 now %d bytes at %d\n", - pArea->aBlocks[0]. + pArea->blocks[0]. size, - pArea->aBlocks[0]. + pArea->blocks[0]. offset); } else { /* If it doesn't append, put into new block 1 */ - pArea->aBlocks[1].offset = + pArea->blocks[1].offset = ced->StagedOffset; - pArea->aBlocks[1].size = + pArea->blocks[1].size = ced->StagedLength; dev_dbg(&ced->interface->dev, "RWM_Complete, circ block 1 started %d bytes at %d\n", - pArea->aBlocks[1]. + pArea->blocks[1]. size, - pArea->aBlocks[1]. + pArea->blocks[1]. offset); } } else { /* No info stored yet, just save in block 0 */ - pArea->aBlocks[0].offset = + pArea->blocks[0].offset = ced->StagedOffset; - pArea->aBlocks[0].size = + pArea->blocks[0].size = ced->StagedLength; dev_dbg(&ced->interface->dev, "RWM_Complete, circ block 0 started %d bytes at %d\n", - pArea->aBlocks[0].size, - pArea->aBlocks[0].offset); + pArea->blocks[0].size, + pArea->blocks[0].offset); } } } @@ -617,35 +617,38 @@ static void staged_callback(struct urb *pUrb) if (!bCancel) { /* Don't generate an event if cancelled */ dev_dbg(&ced->interface->dev, "RWM_Complete, bCircular %d, bToHost %d, eStart %d, eSize %d\n", - pArea->bCircular, pArea->bEventToHost, - pArea->dwEventSt, pArea->dwEventSz); - if ((pArea->dwEventSz) && /* Set a user-mode event... */ - (ced->StagedRead == pArea->bEventToHost)) { /* ...on transfers in this direction? */ - int iWakeUp = 0; /* assume */ - /* If we have completed the right sort of DMA transfer then set the event to notify */ - /* the user code to wake up anyone that is waiting. */ - if ((pArea->bCircular) && /* Circular areas use a simpler test */ - (pArea->bCircToHost)) { /* only in supported direction */ + pArea->circular, pArea->event_to_host, + pArea->event_st, pArea->event_sz); + if ((pArea->event_sz) && /* Set a user-mode event... */ + (ced->StagedRead == pArea->event_to_host)) { /* ...on transfers in this direction? */ + int iWakeUp = 0; /* assume */ + + /* If we have completed the right sort of DMA */ + /* transfer then set the event to notify the */ + /* user code to wake up anyone that is */ + /* waiting. */ + if ((pArea->circular) && /* Circular areas use a simpler test */ + (pArea->circ_to_host)) { /* only in supported direction */ /* Is total data waiting up to size limit? */ unsigned int dwTotal = - pArea->aBlocks[0].size + - pArea->aBlocks[1].size; - iWakeUp = (dwTotal >= pArea->dwEventSz); + pArea->blocks[0].size + + pArea->blocks[1].size; + iWakeUp = (dwTotal >= pArea->event_sz); } else { unsigned int transEnd = ced->StagedOffset + ced->StagedLength; unsigned int eventEnd = - pArea->dwEventSt + pArea->dwEventSz; + pArea->event_st + pArea->event_sz; iWakeUp = (ced->StagedOffset < eventEnd) - && (transEnd > pArea->dwEventSt); + && (transEnd > pArea->event_st); } if (iWakeUp) { dev_dbg(&ced->interface->dev, "About to set event to notify app\n"); - wake_up_interruptible(&pArea->wqEvent); /* wake up waiting processes */ - ++pArea->iWakeUp; /* increment wakeup count */ + wake_up_interruptible(&pArea->event); /* wake up waiting processes */ + ++pArea->wake_up; /* increment wakeup count */ } } } @@ -792,30 +795,30 @@ int ced_read_write_mem(struct ced_data *ced, bool Read, unsigned short wIdent, return U14ERR_NOERROR; } - if ((pArea->bCircular) && /* Circular transfer? */ - (pArea->bCircToHost) && (Read)) { /* In a supported direction */ + if ((pArea->circular) && /* Circular transfer? */ + (pArea->circ_to_host) && (Read)) { /* In a supported direction */ /* If so, we sort out offset ourself */ bool bWait = false; /* Flag for transfer having to wait */ dev_dbg(&ced->interface->dev, "Circular buffers are %d at %d and %d at %d\n", - pArea->aBlocks[0].size, pArea->aBlocks[0].offset, - pArea->aBlocks[1].size, pArea->aBlocks[1].offset); - if (pArea->aBlocks[1].size > 0) { /* Using the second block already? */ - dwOffs = pArea->aBlocks[1].offset + pArea->aBlocks[1].size; /* take offset from that */ - bWait = (dwOffs + dwLen) > pArea->aBlocks[0].offset; /* Wait if will overwrite block 0? */ - bWait |= (dwOffs + dwLen) > pArea->dwLength; /* or if it overflows the buffer */ + pArea->blocks[0].size, pArea->blocks[0].offset, + pArea->blocks[1].size, pArea->blocks[1].offset); + if (pArea->blocks[1].size > 0) { /* Using the second block already? */ + dwOffs = pArea->blocks[1].offset + pArea->blocks[1].size; /* take offset from that */ + bWait = (dwOffs + dwLen) > pArea->blocks[0].offset; /* Wait if will overwrite block 0? */ + bWait |= (dwOffs + dwLen) > pArea->length; /* or if it overflows the buffer */ } else { /* Area 1 not in use, try to use area 0 */ - if (pArea->aBlocks[0].size == 0) /* Reset block 0 if not in use */ - pArea->aBlocks[0].offset = 0; + if (pArea->blocks[0].size == 0) /* Reset block 0 if not in use */ + pArea->blocks[0].offset = 0; dwOffs = - pArea->aBlocks[0].offset + - pArea->aBlocks[0].size; - if ((dwOffs + dwLen) > pArea->dwLength) { /* Off the end of the buffer? */ - pArea->aBlocks[1].offset = 0; /* Set up to use second block */ + pArea->blocks[0].offset + + pArea->blocks[0].size; + if ((dwOffs + dwLen) > pArea->length) { /* Off the end of the buffer? */ + pArea->blocks[1].offset = 0; /* Set up to use second block */ dwOffs = 0; - bWait = (dwOffs + dwLen) > pArea->aBlocks[0].offset; /* Wait if will overwrite block 0? */ - bWait |= (dwOffs + dwLen) > pArea->dwLength; /* or if it overflows the buffer */ + bWait = (dwOffs + dwLen) > pArea->blocks[0].offset; /* Wait if will overwrite block 0? */ + bWait |= (dwOffs + dwLen) > pArea->length; /* or if it overflows the buffer */ } } @@ -985,22 +988,22 @@ static bool ced_read_dma_info(volatile struct dmadesc *pDmaDesc, pDmaDesc->dwSize); if ((wIdent >= MAX_TRANSAREAS) || /* Illegal area number, or... */ - (!ced->rTransDef[wIdent].bUsed) || /* area not set up, or... */ - (pDmaDesc->dwOffset > ced->rTransDef[wIdent].dwLength) || /* range/size */ + (!ced->rTransDef[wIdent].used) || /* area not set up, or... */ + (pDmaDesc->dwOffset > ced->rTransDef[wIdent].length) || /* range/size */ ((pDmaDesc->dwOffset + pDmaDesc->dwSize) > (ced->rTransDef[wIdent]. - dwLength))) { + length))) { bResult = false; /* bad parameter(s) */ dev_dbg(&ced->interface->dev, "%s: bad param - id %d, bUsed %d, offset %d, size %d, area length %d\n", __func__, wIdent, ced->rTransDef[wIdent]. - bUsed, + used, pDmaDesc->dwOffset, pDmaDesc->dwSize, ced->rTransDef[wIdent]. - dwLength); + length); } } break; @@ -1376,7 +1379,7 @@ static int ced_probe(struct usb_interface *interface, goto error; for (i = 0; i < MAX_TRANSAREAS; ++i) { /* Initialise the wait queues */ - init_waitqueue_head(&ced->rTransDef[i].wqEvent); + init_waitqueue_head(&ced->rTransDef[i].event); } /* Put initialises for our stuff here. Note that all of *ced is zero, so */ diff --git a/drivers/staging/ced1401/usb1401.h b/drivers/staging/ced1401/usb1401.h index d93875b689f3..30001652089b 100644 --- a/drivers/staging/ced1401/usb1401.h +++ b/drivers/staging/ced1401/usb1401.h @@ -99,23 +99,30 @@ struct circ_blk { volatile UINT size; /* Size of the block, in bytes (0 = unused) */ }; -/* A structure holding all of the information about a transfer area - an area of */ -/* memory set up for use either as a source or destination in DMA transfers. */ +/* A structure holding all of the information about a transfer area - an area */ +/* of memory set up for use either as a source or destination in DMA */ +/* transfers. */ struct transarea { - void __user *lpvBuff; /* User address of xfer area saved for completeness */ - UINT dwBaseOffset; /* offset to start of xfer area in first page */ - UINT dwLength; /* Length of xfer area, in bytes */ - struct page **pPages; /* Points at array of locked down pages */ - int nPages; /* number of pages that are locked down */ - bool bUsed; /* Is this structure in use? */ - bool bCircular; /* Is this area for circular transfers? */ - bool bCircToHost; /* Flag for direction of circular transfer */ - bool bEventToHost; /* Set event on transfer to host? */ - int iWakeUp; /* Set 1 on event, cleared by TestEvent() */ - UINT dwEventSt; /* Defines section within xfer area for... */ - UINT dwEventSz; /* ...notification by the event SZ is 0 if unset */ - struct circ_blk aBlocks[2]; /* Info on a pair of circular blocks */ - wait_queue_head_t wqEvent; /* The wait queue for events in this area MUST BE LAST */ + /* User address of xfer area saved for completeness */ + void __user *buff; + + /* offset to start of xfer area in first page */ + UINT base_offset; + + UINT length; /* Length of xfer area, in bytes */ + struct page **pages; /* Points at array of locked down pages */ + int n_pages; /* number of pages that are locked down */ + bool used; /* Is this structure in use? */ + bool circular; /* Is this area for circular transfers? */ + bool circ_to_host; /* Flag for direction of circular transfer */ + bool event_to_host; /* Set event on transfer to host? */ + int wake_up; /* Set 1 on event, cleared by TestEvent() */ + UINT event_st; /* Defines section within xfer area for... */ + UINT event_sz; /* notification by the event SZ is 0 if unset */ + struct circ_blk blocks[2]; /* Info on a pair of circular blocks */ + + wait_queue_head_t event; /* The wait queue for events in this */ + /* area MUST BE LAST */ }; /* The DMADESC structure is used to hold information on the transfer in progress. It */