From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Ujfalusi Subject: [PATCH 08/13] crypto: omap-aes - Support for deferred probing when requesting DMA channels Date: Tue, 26 May 2015 16:26:03 +0300 Message-ID: <1432646768-12532-9-git-send-email-peter.ujfalusi@ti.com> References: <1432646768-12532-1-git-send-email-peter.ujfalusi@ti.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , , , , , , , , , , , Herbert Xu , "David S. Miller" , Lokesh Vutla To: , Return-path: In-Reply-To: <1432646768-12532-1-git-send-email-peter.ujfalusi@ti.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org Switch to use ma_request_slave_channel_compat_reason() to request the DMA channels. Only fall back to pio mode if the error code returned is not -EPROBE_DEFER, otherwise return from the probe with the -EPROBE_DEFER. Signed-off-by: Peter Ujfalusi CC: Herbert Xu CC: David S. Miller CC: Lokesh Vutla --- drivers/crypto/omap-aes.c | 38 ++++++++++++++++++++------------------ 1 file changed, 20 insertions(+), 18 deletions(-) diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index 9a28b7e07c71..699a14509adb 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -356,7 +356,7 @@ static void omap_aes_dma_out_callback(void *data) static int omap_aes_dma_init(struct omap_aes_dev *dd) { - int err = -ENOMEM; + int err; dma_cap_mask_t mask; dd->dma_lch_out = NULL; @@ -365,21 +365,20 @@ static int omap_aes_dma_init(struct omap_aes_dev *dd) dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); - dd->dma_lch_in = dma_request_slave_channel_compat(mask, - omap_dma_filter_fn, - &dd->dma_in, - dd->dev, "rx"); - if (!dd->dma_lch_in) { + dd->dma_lch_in = dma_request_slave_channel_compat_reason(mask, + omap_dma_filter_fn, &dd->dma_in, + dd->dev, "rx"); + if (IS_ERR(dd->dma_lch_in)) { dev_err(dd->dev, "Unable to request in DMA channel\n"); - goto err_dma_in; + return PTR_ERR(dd->dma_lch_in); } - dd->dma_lch_out = dma_request_slave_channel_compat(mask, - omap_dma_filter_fn, - &dd->dma_out, - dd->dev, "tx"); - if (!dd->dma_lch_out) { + dd->dma_lch_out = dma_request_slave_channel_compat_reason(mask, + omap_dma_filter_fn, &dd->dma_out, + dd->dev, "tx"); + if (IS_ERR(dd->dma_lch_out)) { dev_err(dd->dev, "Unable to request out DMA channel\n"); + err = PTR_ERR(dd->dma_lch_out); goto err_dma_out; } @@ -387,14 +386,15 @@ static int omap_aes_dma_init(struct omap_aes_dev *dd) err_dma_out: dma_release_channel(dd->dma_lch_in); -err_dma_in: - if (err) - pr_err("error: %d\n", err); + return err; } static void omap_aes_dma_cleanup(struct omap_aes_dev *dd) { + if (dd->pio_only) + return; + dma_release_channel(dd->dma_lch_out); dma_release_channel(dd->dma_lch_in); } @@ -1218,7 +1218,9 @@ static int omap_aes_probe(struct platform_device *pdev) tasklet_init(&dd->queue_task, omap_aes_queue_task, (unsigned long)dd); err = omap_aes_dma_init(dd); - if (err && AES_REG_IRQ_STATUS(dd) && AES_REG_IRQ_ENABLE(dd)) { + if (err == -EPROBE_DEFER) { + goto err_irq; + } else if (err && AES_REG_IRQ_STATUS(dd) && AES_REG_IRQ_ENABLE(dd)) { dd->pio_only = 1; irq = platform_get_irq(pdev, 0); @@ -1262,8 +1264,8 @@ err_algs: for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) crypto_unregister_alg( &dd->pdata->algs_info[i].algs_list[j]); - if (!dd->pio_only) - omap_aes_dma_cleanup(dd); + + omap_aes_dma_cleanup(dd); err_irq: tasklet_kill(&dd->done_task); tasklet_kill(&dd->queue_task); -- 2.3.5 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Ujfalusi Subject: [PATCH 08/13] crypto: omap-aes - Support for deferred probing when requesting DMA channels Date: Tue, 26 May 2015 16:26:03 +0300 Message-ID: <1432646768-12532-9-git-send-email-peter.ujfalusi@ti.com> References: <1432646768-12532-1-git-send-email-peter.ujfalusi@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1432646768-12532-1-git-send-email-peter.ujfalusi@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: vinod.koul@intel.com, tony@atomide.com Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dan.j.williams@intel.com, dmaengine@vger.kernel.org, linux-serial@vger.kernel.org, linux-omap@vger.kernel.org, linux-mmc@vger.kernel.org, linux-crypto@vger.kernel.org, linux-spi@vger.kernel.org, linux-media@vger.kernel.org, alsa-devel@alsa-project.org, Herbert Xu , "David S. Miller" , Lokesh Vutla List-Id: devicetree@vger.kernel.org Switch to use ma_request_slave_channel_compat_reason() to request the DMA channels. Only fall back to pio mode if the error code returned is not -EPROBE_DEFER, otherwise return from the probe with the -EPROBE_DEFER. Signed-off-by: Peter Ujfalusi CC: Herbert Xu CC: David S. Miller CC: Lokesh Vutla --- drivers/crypto/omap-aes.c | 38 ++++++++++++++++++++------------------ 1 file changed, 20 insertions(+), 18 deletions(-) diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index 9a28b7e07c71..699a14509adb 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -356,7 +356,7 @@ static void omap_aes_dma_out_callback(void *data) static int omap_aes_dma_init(struct omap_aes_dev *dd) { - int err = -ENOMEM; + int err; dma_cap_mask_t mask; dd->dma_lch_out = NULL; @@ -365,21 +365,20 @@ static int omap_aes_dma_init(struct omap_aes_dev *dd) dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); - dd->dma_lch_in = dma_request_slave_channel_compat(mask, - omap_dma_filter_fn, - &dd->dma_in, - dd->dev, "rx"); - if (!dd->dma_lch_in) { + dd->dma_lch_in = dma_request_slave_channel_compat_reason(mask, + omap_dma_filter_fn, &dd->dma_in, + dd->dev, "rx"); + if (IS_ERR(dd->dma_lch_in)) { dev_err(dd->dev, "Unable to request in DMA channel\n"); - goto err_dma_in; + return PTR_ERR(dd->dma_lch_in); } - dd->dma_lch_out = dma_request_slave_channel_compat(mask, - omap_dma_filter_fn, - &dd->dma_out, - dd->dev, "tx"); - if (!dd->dma_lch_out) { + dd->dma_lch_out = dma_request_slave_channel_compat_reason(mask, + omap_dma_filter_fn, &dd->dma_out, + dd->dev, "tx"); + if (IS_ERR(dd->dma_lch_out)) { dev_err(dd->dev, "Unable to request out DMA channel\n"); + err = PTR_ERR(dd->dma_lch_out); goto err_dma_out; } @@ -387,14 +386,15 @@ static int omap_aes_dma_init(struct omap_aes_dev *dd) err_dma_out: dma_release_channel(dd->dma_lch_in); -err_dma_in: - if (err) - pr_err("error: %d\n", err); + return err; } static void omap_aes_dma_cleanup(struct omap_aes_dev *dd) { + if (dd->pio_only) + return; + dma_release_channel(dd->dma_lch_out); dma_release_channel(dd->dma_lch_in); } @@ -1218,7 +1218,9 @@ static int omap_aes_probe(struct platform_device *pdev) tasklet_init(&dd->queue_task, omap_aes_queue_task, (unsigned long)dd); err = omap_aes_dma_init(dd); - if (err && AES_REG_IRQ_STATUS(dd) && AES_REG_IRQ_ENABLE(dd)) { + if (err == -EPROBE_DEFER) { + goto err_irq; + } else if (err && AES_REG_IRQ_STATUS(dd) && AES_REG_IRQ_ENABLE(dd)) { dd->pio_only = 1; irq = platform_get_irq(pdev, 0); @@ -1262,8 +1264,8 @@ err_algs: for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) crypto_unregister_alg( &dd->pdata->algs_info[i].algs_list[j]); - if (!dd->pio_only) - omap_aes_dma_cleanup(dd); + + omap_aes_dma_cleanup(dd); err_irq: tasklet_kill(&dd->done_task); tasklet_kill(&dd->queue_task); -- 2.3.5