From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jisheng Zhang Subject: [PATCH v4 1/3] mmc: sdhci: add adma_table_cnt member to struct sdhci_host Date: Thu, 23 Aug 2018 18:07:00 +0800 Message-ID: <20180823180700.3432c4db@xhacker.debian> References: <20180823180549.78e508db@xhacker.debian> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20180823180549.78e508db@xhacker.debian> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Adrian Hunter , Ulf Hansson Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-Id: linux-mmc@vger.kernel.org This patch adds adma_table_cnt member to struct sdhci_host to give more flexibility to drivers to control the ADMA table count. Default value of adma_table_cnt is set to (SDHCI_MAX_SEGS * 2 + 1). Signed-off-by: Jisheng Zhang --- drivers/mmc/host/sdhci.c | 17 +++++++++-------- drivers/mmc/host/sdhci.h | 3 +++ 2 files changed, 12 insertions(+), 8 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 1b3fbd9bd5c5..52ccf4644384 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -3322,6 +3322,13 @@ struct sdhci_host *sdhci_alloc_host(struct device *dev, host->sdma_boundary = SDHCI_DEFAULT_BOUNDARY_ARG; + /* + * The DMA table descriptor count is calculated as the maximum + * number of segments times 2, to allow for an alignment + * descriptor for each segment, plus 1 for a nop end descriptor. + */ + host->adma_table_cnt = SDHCI_MAX_SEGS * 2 + 1; + return host; } @@ -3567,18 +3574,12 @@ int sdhci_setup_host(struct sdhci_host *host) dma_addr_t dma; void *buf; - /* - * The DMA descriptor table size is calculated as the maximum - * number of segments times 2, to allow for an alignment - * descriptor for each segment, plus 1 for a nop end descriptor, - * all multipled by the descriptor size. - */ if (host->flags & SDHCI_USE_64_BIT_DMA) { - host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) * + host->adma_table_sz = host->adma_table_cnt * SDHCI_ADMA2_64_DESC_SZ; host->desc_sz = SDHCI_ADMA2_64_DESC_SZ; } else { - host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) * + host->adma_table_sz = host->adma_table_cnt * SDHCI_ADMA2_32_DESC_SZ; host->desc_sz = SDHCI_ADMA2_32_DESC_SZ; } diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index f0bd36ce3817..25bddd21de31 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -563,6 +563,9 @@ struct sdhci_host { /* Host SDMA buffer boundary. */ u32 sdma_boundary; + /* Host ADMA table count */ + u32 adma_table_cnt; + u64 data_timeout; unsigned long private[0] ____cacheline_aligned; -- 2.18.0