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path: root/drivers/staging/ath6kl/hif/sdio/linux_sdio/src/hif_scatter.c
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Diffstat (limited to 'drivers/staging/ath6kl/hif/sdio/linux_sdio/src/hif_scatter.c')
-rw-r--r--drivers/staging/ath6kl/hif/sdio/linux_sdio/src/hif_scatter.c393
1 files changed, 0 insertions, 393 deletions
diff --git a/drivers/staging/ath6kl/hif/sdio/linux_sdio/src/hif_scatter.c b/drivers/staging/ath6kl/hif/sdio/linux_sdio/src/hif_scatter.c
deleted file mode 100644
index 7516d913dab3..000000000000
--- a/drivers/staging/ath6kl/hif/sdio/linux_sdio/src/hif_scatter.c
+++ /dev/null
@@ -1,393 +0,0 @@
-//------------------------------------------------------------------------------
-// Copyright (c) 2009-2010 Atheros Corporation. All rights reserved.
-//
-//
-// Permission to use, copy, modify, and/or distribute this software for any
-// purpose with or without fee is hereby granted, provided that the above
-// copyright notice and this permission notice appear in all copies.
-//
-// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-//
-//
-//------------------------------------------------------------------------------
-//==============================================================================
-// HIF scatter implementation
-//
-// Author(s): ="Atheros"
-//==============================================================================
-
-#include <linux/mmc/card.h>
-#include <linux/mmc/host.h>
-#include <linux/mmc/sdio_func.h>
-#include <linux/mmc/sdio_ids.h>
-#include <linux/mmc/sdio.h>
-#include <linux/kthread.h>
-#include "hif_internal.h"
-#define ATH_MODULE_NAME hif
-#include "a_debug.h"
-
-#ifdef HIF_LINUX_MMC_SCATTER_SUPPORT
-
-#define _CMD53_ARG_READ 0
-#define _CMD53_ARG_WRITE 1
-#define _CMD53_ARG_BLOCK_BASIS 1
-#define _CMD53_ARG_FIXED_ADDRESS 0
-#define _CMD53_ARG_INCR_ADDRESS 1
-
-#define SDIO_SET_CMD53_ARG(arg,rw,func,mode,opcode,address,bytes_blocks) \
- (arg) = (((rw) & 1) << 31) | \
- (((func) & 0x7) << 28) | \
- (((mode) & 1) << 27) | \
- (((opcode) & 1) << 26) | \
- (((address) & 0x1FFFF) << 9) | \
- ((bytes_blocks) & 0x1FF)
-
-static void FreeScatterReq(struct hif_device *device, struct hif_scatter_req *pReq)
-{
- unsigned long flag;
-
- spin_lock_irqsave(&device->lock, flag);
-
- DL_ListInsertTail(&device->ScatterReqHead, &pReq->ListLink);
-
- spin_unlock_irqrestore(&device->lock, flag);
-
-}
-
-static struct hif_scatter_req *AllocScatterReq(struct hif_device *device)
-{
- struct dl_list *pItem;
- unsigned long flag;
-
- spin_lock_irqsave(&device->lock, flag);
-
- pItem = DL_ListRemoveItemFromHead(&device->ScatterReqHead);
-
- spin_unlock_irqrestore(&device->lock, flag);
-
- if (pItem != NULL) {
- return A_CONTAINING_STRUCT(pItem, struct hif_scatter_req, ListLink);
- }
-
- return NULL;
-}
-
- /* called by async task to perform the operation synchronously using direct MMC APIs */
-int DoHifReadWriteScatter(struct hif_device *device, BUS_REQUEST *busrequest)
-{
- int i;
- u8 rw;
- u8 opcode;
- struct mmc_request mmcreq;
- struct mmc_command cmd;
- struct mmc_data data;
- struct hif_scatter_req_priv *pReqPriv;
- struct hif_scatter_req *pReq;
- int status = 0;
- struct scatterlist *pSg;
-
- pReqPriv = busrequest->pScatterReq;
-
- A_ASSERT(pReqPriv != NULL);
-
- pReq = pReqPriv->pHifScatterReq;
-
- memset(&mmcreq, 0, sizeof(struct mmc_request));
- memset(&cmd, 0, sizeof(struct mmc_command));
- memset(&data, 0, sizeof(struct mmc_data));
-
- data.blksz = HIF_MBOX_BLOCK_SIZE;
- data.blocks = pReq->TotalLength / HIF_MBOX_BLOCK_SIZE;
-
- AR_DEBUG_PRINTF(ATH_DEBUG_SCATTER, ("HIF-SCATTER: (%s) Address: 0x%X, (BlockLen: %d, BlockCount: %d) , (tot:%d,sg:%d)\n",
- (pReq->Request & HIF_WRITE) ? "WRITE":"READ", pReq->Address, data.blksz, data.blocks,
- pReq->TotalLength,pReq->ValidScatterEntries));
-
- if (pReq->Request & HIF_WRITE) {
- rw = _CMD53_ARG_WRITE;
- data.flags = MMC_DATA_WRITE;
- } else {
- rw = _CMD53_ARG_READ;
- data.flags = MMC_DATA_READ;
- }
-
- if (pReq->Request & HIF_FIXED_ADDRESS) {
- opcode = _CMD53_ARG_FIXED_ADDRESS;
- } else {
- opcode = _CMD53_ARG_INCR_ADDRESS;
- }
-
- /* fill SG entries */
- pSg = pReqPriv->sgentries;
- sg_init_table(pSg, pReq->ValidScatterEntries);
-
- /* assemble SG list */
- for (i = 0 ; i < pReq->ValidScatterEntries ; i++, pSg++) {
- /* setup each sg entry */
- if ((unsigned long)pReq->ScatterList[i].pBuffer & 0x3) {
- /* note some scatter engines can handle unaligned buffers, print this
- * as informational only */
- AR_DEBUG_PRINTF(ATH_DEBUG_SCATTER,
- ("HIF: (%s) Scatter Buffer is unaligned 0x%lx\n",
- pReq->Request & HIF_WRITE ? "WRITE":"READ",
- (unsigned long)pReq->ScatterList[i].pBuffer));
- }
-
- AR_DEBUG_PRINTF(ATH_DEBUG_SCATTER, (" %d: Addr:0x%lX, Len:%d \n",
- i,(unsigned long)pReq->ScatterList[i].pBuffer,pReq->ScatterList[i].Length));
-
- sg_set_buf(pSg, pReq->ScatterList[i].pBuffer, pReq->ScatterList[i].Length);
- }
- /* set scatter-gather table for request */
- data.sg = pReqPriv->sgentries;
- data.sg_len = pReq->ValidScatterEntries;
- /* set command argument */
- SDIO_SET_CMD53_ARG(cmd.arg,
- rw,
- device->func->num,
- _CMD53_ARG_BLOCK_BASIS,
- opcode,
- pReq->Address,
- data.blocks);
-
- cmd.opcode = SD_IO_RW_EXTENDED;
- cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
-
- mmcreq.cmd = &cmd;
- mmcreq.data = &data;
-
- mmc_set_data_timeout(&data, device->func->card);
- /* synchronous call to process request */
- mmc_wait_for_req(device->func->card->host, &mmcreq);
-
- if (cmd.error) {
- status = A_ERROR;
- AR_DEBUG_PRINTF(ATH_DEBUG_ERROR, ("HIF-SCATTER: cmd error: %d \n",cmd.error));
- }
-
- if (data.error) {
- status = A_ERROR;
- AR_DEBUG_PRINTF(ATH_DEBUG_ERROR, ("HIF-SCATTER: data error: %d \n",data.error));
- }
-
- if (status) {
- AR_DEBUG_PRINTF(ATH_DEBUG_ERROR, ("HIF-SCATTER: FAILED!!! (%s) Address: 0x%X, Block mode (BlockLen: %d, BlockCount: %d)\n",
- (pReq->Request & HIF_WRITE) ? "WRITE":"READ",pReq->Address, data.blksz, data.blocks));
- }
-
- /* set completion status, fail or success */
- pReq->CompletionStatus = status;
-
- if (pReq->Request & HIF_ASYNCHRONOUS) {
- AR_DEBUG_PRINTF(ATH_DEBUG_SCATTER, ("HIF-SCATTER: async_task completion routine req: 0x%lX (%d)\n",(unsigned long)busrequest, status));
- /* complete the request */
- A_ASSERT(pReq->CompletionRoutine != NULL);
- pReq->CompletionRoutine(pReq);
- } else {
- AR_DEBUG_PRINTF(ATH_DEBUG_SCATTER, ("HIF-SCATTER async_task upping busrequest : 0x%lX (%d)\n", (unsigned long)busrequest,status));
- /* signal wait */
- up(&busrequest->sem_req);
- }
-
- return status;
-}
-
- /* callback to issue a read-write scatter request */
-static int HifReadWriteScatter(struct hif_device *device, struct hif_scatter_req *pReq)
-{
- int status = A_EINVAL;
- u32 request = pReq->Request;
- struct hif_scatter_req_priv *pReqPriv = (struct hif_scatter_req_priv *)pReq->HIFPrivate[0];
-
- do {
-
- A_ASSERT(pReqPriv != NULL);
-
- AR_DEBUG_PRINTF(ATH_DEBUG_SCATTER, ("HIF-SCATTER: total len: %d Scatter Entries: %d\n",
- pReq->TotalLength, pReq->ValidScatterEntries));
-
- if (!(request & HIF_EXTENDED_IO)) {
- AR_DEBUG_PRINTF(ATH_DEBUG_ERROR,
- ("HIF-SCATTER: Invalid command type: 0x%08x\n", request));
- break;
- }
-
- if (!(request & (HIF_SYNCHRONOUS | HIF_ASYNCHRONOUS))) {
- AR_DEBUG_PRINTF(ATH_DEBUG_ERROR,
- ("HIF-SCATTER: Invalid execution mode: 0x%08x\n", request));
- break;
- }
-
- if (!(request & HIF_BLOCK_BASIS)) {
- AR_DEBUG_PRINTF(ATH_DEBUG_ERROR,
- ("HIF-SCATTER: Invalid data mode: 0x%08x\n", request));
- break;
- }
-
- if (pReq->TotalLength > MAX_SCATTER_REQ_TRANSFER_SIZE) {
- AR_DEBUG_PRINTF(ATH_DEBUG_ERROR,
- ("HIF-SCATTER: Invalid length: %d \n", pReq->TotalLength));
- break;
- }
-
- if (pReq->TotalLength == 0) {
- A_ASSERT(false);
- break;
- }
-
- /* add bus request to the async list for the async I/O thread to process */
- AddToAsyncList(device, pReqPriv->busrequest);
-
- if (request & HIF_SYNCHRONOUS) {
- AR_DEBUG_PRINTF(ATH_DEBUG_SCATTER, ("HIF-SCATTER: queued sync req: 0x%lX\n", (unsigned long)pReqPriv->busrequest));
- /* signal thread and wait */
- up(&device->sem_async);
- if (down_interruptible(&pReqPriv->busrequest->sem_req) != 0) {
- AR_DEBUG_PRINTF(ATH_DEBUG_ERROR,("HIF-SCATTER: interrupted! \n"));
- /* interrupted, exit */
- status = A_ERROR;
- break;
- } else {
- status = pReq->CompletionStatus;
- }
- } else {
- AR_DEBUG_PRINTF(ATH_DEBUG_SCATTER, ("HIF-SCATTER: queued async req: 0x%lX\n", (unsigned long)pReqPriv->busrequest));
- /* wake thread, it will process and then take care of the async callback */
- up(&device->sem_async);
- status = 0;
- }
-
- } while (false);
-
- if (status && (request & HIF_ASYNCHRONOUS)) {
- pReq->CompletionStatus = status;
- pReq->CompletionRoutine(pReq);
- status = 0;
- }
-
- return status;
-}
-
- /* setup of HIF scatter resources */
-int SetupHIFScatterSupport(struct hif_device *device, struct hif_device_scatter_support_info *pInfo)
-{
- int status = A_ERROR;
- int i;
- struct hif_scatter_req_priv *pReqPriv;
- BUS_REQUEST *busrequest;
-
- do {
-
- /* check if host supports scatter requests and it meets our requirements */
- if (device->func->card->host->max_segs < MAX_SCATTER_ENTRIES_PER_REQ) {
- AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("HIF-SCATTER : host only supports scatter of : %d entries, need: %d \n",
- device->func->card->host->max_segs, MAX_SCATTER_ENTRIES_PER_REQ));
- status = A_ENOTSUP;
- break;
- }
-
- AR_DEBUG_PRINTF(ATH_DEBUG_ANY,("HIF-SCATTER Enabled: max scatter req : %d entries: %d \n",
- MAX_SCATTER_REQUESTS, MAX_SCATTER_ENTRIES_PER_REQ));
-
- for (i = 0; i < MAX_SCATTER_REQUESTS; i++) {
- /* allocate the private request blob */
- pReqPriv = (struct hif_scatter_req_priv *)A_MALLOC(sizeof(struct hif_scatter_req_priv));
- if (NULL == pReqPriv) {
- break;
- }
- A_MEMZERO(pReqPriv, sizeof(struct hif_scatter_req_priv));
- /* save the device instance*/
- pReqPriv->device = device;
- /* allocate the scatter request */
- pReqPriv->pHifScatterReq = (struct hif_scatter_req *)A_MALLOC(sizeof(struct hif_scatter_req) +
- (MAX_SCATTER_ENTRIES_PER_REQ - 1) * (sizeof(struct hif_scatter_item)));
-
- if (NULL == pReqPriv->pHifScatterReq) {
- kfree(pReqPriv);
- break;
- }
- /* just zero the main part of the scatter request */
- A_MEMZERO(pReqPriv->pHifScatterReq, sizeof(struct hif_scatter_req));
- /* back pointer to the private struct */
- pReqPriv->pHifScatterReq->HIFPrivate[0] = pReqPriv;
- /* allocate a bus request for this scatter request */
- busrequest = hifAllocateBusRequest(device);
- if (NULL == busrequest) {
- kfree(pReqPriv->pHifScatterReq);
- kfree(pReqPriv);
- break;
- }
- /* assign the scatter request to this bus request */
- busrequest->pScatterReq = pReqPriv;
- /* point back to the request */
- pReqPriv->busrequest = busrequest;
- /* add it to the scatter pool */
- FreeScatterReq(device,pReqPriv->pHifScatterReq);
- }
-
- if (i != MAX_SCATTER_REQUESTS) {
- status = A_NO_MEMORY;
- AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("HIF-SCATTER : failed to alloc scatter resources !\n"));
- break;
- }
-
- /* set scatter function pointers */
- pInfo->pAllocateReqFunc = AllocScatterReq;
- pInfo->pFreeReqFunc = FreeScatterReq;
- pInfo->pReadWriteScatterFunc = HifReadWriteScatter;
- pInfo->MaxScatterEntries = MAX_SCATTER_ENTRIES_PER_REQ;
- pInfo->MaxTransferSizePerScatterReq = MAX_SCATTER_REQ_TRANSFER_SIZE;
-
- status = 0;
-
- } while (false);
-
- if (status) {
- CleanupHIFScatterResources(device);
- }
-
- return status;
-}
-
- /* clean up scatter support */
-void CleanupHIFScatterResources(struct hif_device *device)
-{
- struct hif_scatter_req_priv *pReqPriv;
- struct hif_scatter_req *pReq;
-
- /* empty the free list */
-
- while (1) {
-
- pReq = AllocScatterReq(device);
-
- if (NULL == pReq) {
- break;
- }
-
- pReqPriv = (struct hif_scatter_req_priv *)pReq->HIFPrivate[0];
- A_ASSERT(pReqPriv != NULL);
-
- if (pReqPriv->busrequest != NULL) {
- pReqPriv->busrequest->pScatterReq = NULL;
- /* free bus request */
- hifFreeBusRequest(device, pReqPriv->busrequest);
- pReqPriv->busrequest = NULL;
- }
-
- if (pReqPriv->pHifScatterReq != NULL) {
- kfree(pReqPriv->pHifScatterReq);
- pReqPriv->pHifScatterReq = NULL;
- }
-
- kfree(pReqPriv);
- }
-}
-
-#endif // HIF_LINUX_MMC_SCATTER_SUPPORT
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