}
EXPORT_SYMBOL(mmc_start_request);
-/*
- * mmc_wait_data_done() - done callback for data request
- * @mrq: done data request
- *
- * Wakes up mmc context, passed as a callback to host controller driver
- */
-static void mmc_wait_data_done(struct mmc_request *mrq)
-{
- struct mmc_context_info *context_info = &mrq->host->context_info;
-
- context_info->is_done_rcv = true;
- wake_up_interruptible(&context_info->wait);
-}
-
static void mmc_wait_done(struct mmc_request *mrq)
{
complete(&mrq->completion);
wait_for_completion(&ongoing_mrq->cmd_completion);
}
-/*
- *__mmc_start_data_req() - starts data request
- * @host: MMC host to start the request
- * @mrq: data request to start
- *
- * Sets the done callback to be called when request is completed by the card.
- * Starts data mmc request execution
- * If an ongoing transfer is already in progress, wait for the command line
- * to become available before sending another command.
- */
-static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq)
-{
- int err;
-
- mmc_wait_ongoing_tfr_cmd(host);
-
- mrq->done = mmc_wait_data_done;
- mrq->host = host;
-
- err = mmc_start_request(host, mrq);
- if (err) {
- mrq->cmd->error = err;
- mmc_complete_cmd(mrq);
- mmc_wait_data_done(mrq);
- }
-
- return err;
-}
-
static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq)
{
int err;
*/
bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq)
{
- if (host->areq)
- return host->context_info.is_done_rcv;
- else
- return completion_done(&mrq->completion);
+ return completion_done(&mrq->completion);
}
EXPORT_SYMBOL(mmc_is_req_done);
-/**
- * mmc_finalize_areq() - finalize an asynchronous request
- * @host: MMC host to finalize any ongoing request on
- *
- * Returns the status of the ongoing asynchronous request, but
- * MMC_BLK_SUCCESS if no request was going on.
- */
-static enum mmc_blk_status mmc_finalize_areq(struct mmc_host *host)
-{
- struct mmc_context_info *context_info = &host->context_info;
- enum mmc_blk_status status;
-
- if (!host->areq)
- return MMC_BLK_SUCCESS;
-
- while (1) {
- wait_event_interruptible(context_info->wait,
- (context_info->is_done_rcv ||
- context_info->is_new_req));
-
- if (context_info->is_done_rcv) {
- struct mmc_command *cmd;
-
- context_info->is_done_rcv = false;
- cmd = host->areq->mrq->cmd;
-
- if (!cmd->error || !cmd->retries ||
- mmc_card_removed(host->card)) {
- status = host->areq->err_check(host->card,
- host->areq);
- break; /* return status */
- } else {
- mmc_retune_recheck(host);
- pr_info("%s: req failed (CMD%u): %d, retrying...\n",
- mmc_hostname(host),
- cmd->opcode, cmd->error);
- cmd->retries--;
- cmd->error = 0;
- __mmc_start_request(host, host->areq->mrq);
- continue; /* wait for done/new event again */
- }
- }
-
- return MMC_BLK_NEW_REQUEST;
- }
-
- mmc_retune_release(host);
-
- /*
- * Check BKOPS urgency for each R1 response
- */
- if (host->card && mmc_card_mmc(host->card) &&
- ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) ||
- (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) &&
- (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) {
- mmc_start_bkops(host->card, true);
- }
-
- return status;
-}
-
-/**
- * mmc_start_areq - start an asynchronous request
- * @host: MMC host to start command
- * @areq: asynchronous request to start
- * @ret_stat: out parameter for status
- *
- * Start a new MMC custom command request for a host.
- * If there is on ongoing async request wait for completion
- * of that request and start the new one and return.
- * Does not wait for the new request to complete.
- *
- * Returns the completed request, NULL in case of none completed.
- * Wait for the an ongoing request (previoulsy started) to complete and
- * return the completed request. If there is no ongoing request, NULL
- * is returned without waiting. NULL is not an error condition.
- */
-struct mmc_async_req *mmc_start_areq(struct mmc_host *host,
- struct mmc_async_req *areq,
- enum mmc_blk_status *ret_stat)
-{
- enum mmc_blk_status status;
- int start_err = 0;
- struct mmc_async_req *previous = host->areq;
-
- /* Prepare a new request */
- if (areq)
- mmc_pre_req(host, areq->mrq);
-
- /* Finalize previous request */
- status = mmc_finalize_areq(host);
- if (ret_stat)
- *ret_stat = status;
-
- /* The previous request is still going on... */
- if (status == MMC_BLK_NEW_REQUEST)
- return NULL;
-
- /* Fine so far, start the new request! */
- if (status == MMC_BLK_SUCCESS && areq)
- start_err = __mmc_start_data_req(host, areq->mrq);
-
- /* Postprocess the old request at this point */
- if (host->areq)
- mmc_post_req(host, host->areq->mrq, 0);
-
- /* Cancel a prepared request if it was not started. */
- if ((status != MMC_BLK_SUCCESS || start_err) && areq)
- mmc_post_req(host, areq->mrq, -EINVAL);
-
- if (status != MMC_BLK_SUCCESS)
- host->areq = NULL;
- else
- host->areq = areq;
-
- return previous;
-}
-EXPORT_SYMBOL(mmc_start_areq);
-
/**
* mmc_wait_for_req - start a request and wait for completion
* @host: MMC host to start command
}
#endif
-/**
- * mmc_init_context_info() - init synchronization context
- * @host: mmc host
- *
- * Init struct context_info needed to implement asynchronous
- * request mechanism, used by mmc core, host driver and mmc requests
- * supplier.
- */
-void mmc_init_context_info(struct mmc_host *host)
-{
- host->context_info.is_new_req = false;
- host->context_info.is_done_rcv = false;
- host->context_info.is_waiting_last_req = false;
- init_waitqueue_head(&host->context_info.wait);
-}
-
static int __init mmc_init(void)
{
int ret;
projects / linux.git / commitdiff