diff options
| author | Veerabhadrarao Badiganti <vbadigan@codeaurora.org> | 2020-01-20 20:08:38 +0530 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2020-01-24 12:11:48 +0100 |
| commit | a663f64bf18dea0816642ff343c5e3bf8fb22fca (patch) | |
| tree | 1008c520c3117ef2b4d32375425d086bbb177239 /drivers/mmc/host/sdhci.c | |
| parent | 80c7482356ac9f08dbdb01a3c8485401494d9e05 (diff) | |
| download | lwn-a663f64bf18dea0816642ff343c5e3bf8fb22fca.tar.gz lwn-a663f64bf18dea0816642ff343c5e3bf8fb22fca.zip | |
mmc: sdhci: Let a vendor driver supply and update ADMA descriptor size
Let a vendor driver supply the maximum descriptor size that it
can operate on. ADMA descriptor table would be allocated using this
supplied size.
If any SD Host controller is of version prior to v4.10 spec
but supports 16byte descriptor, this change allows them to supply
correct descriptor size for ADMA table allocation.
Also let a vendor driver update the descriptor size by overriding
sdhc_host->desc_size if it has to operates on a different descriptor
sizes in different conditions.
Suggested-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1579531122-28341-1-git-send-email-vbadigan@codeaurora.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index f9e0b5f2c692..63db84481dff 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -4043,15 +4043,13 @@ int sdhci_setup_host(struct sdhci_host *host) dma_addr_t dma; void *buf; - if (host->flags & SDHCI_USE_64_BIT_DMA) { - host->adma_table_sz = host->adma_table_cnt * - SDHCI_ADMA2_64_DESC_SZ(host); - host->desc_sz = SDHCI_ADMA2_64_DESC_SZ(host); - } else { - host->adma_table_sz = host->adma_table_cnt * - SDHCI_ADMA2_32_DESC_SZ; - host->desc_sz = SDHCI_ADMA2_32_DESC_SZ; - } + if (!(host->flags & SDHCI_USE_64_BIT_DMA)) + host->alloc_desc_sz = SDHCI_ADMA2_32_DESC_SZ; + else if (!host->alloc_desc_sz) + host->alloc_desc_sz = SDHCI_ADMA2_64_DESC_SZ(host); + + host->desc_sz = host->alloc_desc_sz; + host->adma_table_sz = host->adma_table_cnt * host->desc_sz; host->align_buffer_sz = SDHCI_MAX_SEGS * SDHCI_ADMA2_ALIGN; /* |