/* setup of HIF scatter resources */
A_STATUS SetupHIFScatterSupport(HIF_DEVICE *device, HIF_DEVICE_SCATTER_SUPPORT_INFO *pInfo)
{
A_STATUS status = A_ERROR;
int i;
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 = (HIF_SCATTER_REQ_PRIV *)A_MALLOC(sizeof(HIF_SCATTER_REQ_PRIV));
if (NULL == pReqPriv) {
break;
}
A_MEMZERO(pReqPriv, sizeof(HIF_SCATTER_REQ_PRIV));
/* save the device instance*/
pReqPriv->device = device;
/* allocate the scatter request */
pReqPriv->pHifScatterReq = (HIF_SCATTER_REQ *)A_MALLOC(sizeof(HIF_SCATTER_REQ) +
(MAX_SCATTER_ENTRIES_PER_REQ - 1) * (sizeof(HIF_SCATTER_ITEM)));
if (NULL == pReqPriv->pHifScatterReq) {
A_FREE(pReqPriv);
break;
}
/* just zero the main part of the scatter request */
A_MEMZERO(pReqPriv->pHifScatterReq, sizeof(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) {
A_FREE(pReqPriv->pHifScatterReq);
A_FREE(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 = A_OK;
} while (FALSE);
if (A_FAILED(status)) {
CleanupHIFScatterResources(device);
}
return status;
}
A_STATUS SetupHIFScatterSupport(HIF_DEVICE *device, HIF_DEVICE_SCATTER_SUPPORT_INFO *pInfo)
{
A_STATUS status = A_ERROR;
int maxTransferSizePerScatter = MAX_SCATTER_REQ_TRANSFER_SIZE;
int size, i;
HIF_SCATTER_REQ *pReq;
SDREQUEST *sdrequest;
do {
DetermineScatterMethod(device);
if (device->ScatterMethod == HIF_SCATTER_NONE) {
/* no scatter support */
break;
}
AR_DEBUG_PRINTF(ATH_DEBUG_INIT,("HIF : Cache Line Size: %d bytes \n",A_GET_CACHE_LINE_BYTES()));
size = sizeof(HIF_SCATTER_REQ) +
(MAX_SCATTER_ENTRIES_PER_REQ - 1) * (sizeof(HIF_SCATTER_ITEM));
for (i = 0; i < MAX_SCATTER_REQUESTS; i++) {
pReq = A_MALLOC(size);
if (NULL == pReq) {
break;
}
A_MEMZERO(pReq, size);
/* save the device instance */
SET_DEVICE_INFO_SR(pReq, device);
/* allocate a bus request for this scatter request */
sdrequest = SDDeviceAllocRequest(device->handle);
if (NULL == sdrequest) {
A_FREE(pReq);
break;
}
/* store bus request into private area */
SET_SDREQUEST_SR(pReq,sdrequest);
status = SetupScatterResource(device,pReq);
if (A_FAILED(status)) {
SDDeviceFreeRequest(device->handle, sdrequest);
A_FREE(pReq);
break;
}
/* add it to the free pool */
FreeScatterReq(device, pReq);
}
if (i != MAX_SCATTER_REQUESTS) {
status = A_NO_MEMORY;
break;
}
/* set function pointers */
pInfo->pAllocateReqFunc = AllocScatterReq;
pInfo->pFreeReqFunc = FreeScatterReq;
pInfo->pReadWriteScatterFunc = HifReadWriteScatter;
pInfo->MaxScatterEntries = MAX_SCATTER_ENTRIES_PER_REQ;
pInfo->MaxTransferSizePerScatterReq = maxTransferSizePerScatter;
status = A_OK;
} while (FALSE);
if (A_FAILED(status)) {
CleanupHIFScatterResources(device);
}
return status;
}
