[PATCH 02/14] mmc: mmci: internalize dma map/unmap into mmci dma functions
From: Ludovic Barre <hidden>
Date: 2018-08-01 09:38:15
Also in:
linux-arm-kernel, linux-mmc, lkml
Subsystem:
arm primecell mmci pl180/1 driver, multimedia card (mmc), secure digital (sd) and sdio subsystem, the rest · Maintainers:
Russell King, Ulf Hansson, Linus Torvalds
From: Ludovic Barre <redacted> This patch internalizes the management of dma map/unmap into mmci dma interfaces. This allows to simplify and prepare the next dma callbacks for mmci host ops. mmci_dma_unmap was called in mmci_data_irq & mmci_cmd_irq functions and can be integrated in mmci_dma_data_error. Signed-off-by: Ludovic Barre <redacted> --- drivers/mmc/host/mmci.c | 44 +++++++++++++++++++------------------------- 1 file changed, 19 insertions(+), 25 deletions(-)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 1841d250..d8fa178 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c@@ -482,17 +482,7 @@ static inline void mmci_dma_release(struct mmci_host *host) host->dma_rx_channel = host->dma_tx_channel = NULL; } -static void mmci_dma_data_error(struct mmci_host *host) -{ - dev_err(mmc_dev(host->mmc), "error during DMA transfer!\n"); - dmaengine_terminate_all(host->dma_current); - host->dma_in_progress = false; - host->dma_current = NULL; - host->dma_desc_current = NULL; - host->data->host_cookie = 0; -} - -static void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data) +static void __mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data) { struct dma_chan *chan;
@@ -505,6 +495,18 @@ static void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data) mmc_get_dma_dir(data)); } +static void mmci_dma_data_error(struct mmci_host *host) +{ + dev_err(mmc_dev(host->mmc), "error during DMA transfer!\n"); + dmaengine_terminate_all(host->dma_current); + host->dma_in_progress = false; + host->dma_current = NULL; + host->dma_desc_current = NULL; + host->data->host_cookie = 0; + + __mmci_dma_unmap(host, host->data); +} + static void mmci_dma_finalize(struct mmci_host *host, struct mmc_data *data) { u32 status;
@@ -528,11 +530,10 @@ static void mmci_dma_finalize(struct mmci_host *host, struct mmc_data *data) mmci_dma_data_error(host); if (!data->error) data->error = -EIO; + } else if (!data->host_cookie) { + __mmci_dma_unmap(host, data); } - if (!data->host_cookie) - mmci_dma_unmap(host, data); - /* * Use of DMA with scatter-gather is impossible. * Give up with DMA and switch back to PIO mode.
@@ -704,7 +705,7 @@ static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq, if (!data || !data->host_cookie) return; - mmci_dma_unmap(host, data); + __mmci_dma_unmap(host, data); if (err) { struct mmci_host_next *next = &host->next_data;
@@ -742,10 +743,6 @@ static inline void mmci_dma_release(struct mmci_host *host) { } -static inline void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data) -{ -} - static inline void mmci_dma_finalize(struct mmci_host *host, struct mmc_data *data) {
@@ -906,10 +903,8 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data, u32 remain, success; /* Terminate the DMA transfer */ - if (dma_inprogress(host)) { + if (dma_inprogress(host)) mmci_dma_data_error(host); - mmci_dma_unmap(host, data); - } /* * Calculate how far we are into the transfer. Note that
@@ -1055,10 +1050,9 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, if ((!sbc && !cmd->data) || cmd->error) { if (host->data) { /* Terminate the DMA transfer */ - if (dma_inprogress(host)) { + if (dma_inprogress(host)) mmci_dma_data_error(host); - mmci_dma_unmap(host, host->data); - } + mmci_stop_data(host); } mmci_request_end(host, host->mrq);
--
2.7.4