Lines Matching +full:mmc +full:-

2 MMC Asynchronous Request
11 pre-fetch makes the cache overhead relatively significant. If the DMA
13 transfer, the DMA preparation overhead would not affect the MMC performance.
15 The intention of non-blocking (asynchronous) MMC requests is to minimize the
16 time between when an MMC request ends and another MMC request begins.
18 Using mmc_wait_for_req(), the MMC controller is idle while dma_map_sg and
19 dma_unmap_sg are processing. Using non-blocking MMC requests makes it
21 MMC request.
23 MMC block driver
26 The mmc_blk_issue_rw_rq() in the MMC block driver is made non-blocking.
30 a request and how fast the memory is. The faster the MMC/SD is the
40 https://wiki.linaro.org/WorkingGroups/Kernel/Specs/StoragePerfMMC-async-req
42 MMC core API extension
47 It starts a new MMC command request for a host. The function isn't
48 truly non-blocking. If there is an ongoing async request it waits
53 MMC host extensions
56 There are two optional members in the mmc_host_ops -- pre_req() and
57 post_req() -- that the host driver may implement in order to move work
77   if (is_first_req && req->size > threshold)
78      /* start MMC transfer for the complete transfer size */
82       * Begin to prepare DMA while cmd is being processed by MMC.
84       * to prepare as the "MMC process command time".
85       * If prepare time exceeds MMC cmd time
90       dma_issue_pending(req->dma_desc);
94        * The second issue_pending should be called before MMC runs out
95        * of the first chunk. If the MMC runs out of the first data chunk
98       dma_issue_pending(req->dma_desc);