From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Ujfalusi Subject: [PATCH 07/16] dmaengine: Add function to request slave channel from a dma_device Date: Mon, 6 May 2019 15:34:47 +0300 Message-ID: <20190506123456.6777-8-peter.ujfalusi@ti.com> References: <20190506123456.6777-1-peter.ujfalusi@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20190506123456.6777-1-peter.ujfalusi@ti.com> 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: vkoul@kernel.org, robh+dt@kernel.org, nm@ti.com, ssantosh@kernel.org Cc: devicetree@vger.kernel.org, grygorii.strashko@ti.com, lokeshvutla@ti.com, linux-kernel@vger.kernel.org, t-kristo@ti.com, tony@atomide.com, dmaengine@vger.kernel.org, dan.j.williams@intel.com, linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org dma_get_any_slave_channel() would skip using the filter function, which in some cases needed to be executed before the alloc_chan_resources callback to make sure that all parameters are provided for the slave channel. Signed-off-by: Peter Ujfalusi --- drivers/dma/dmaengine.c | 7 ++++--- include/linux/dmaengine.h | 5 ++++- 2 files changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 8eed5ff0fc01..7ec93be12088 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -617,7 +617,8 @@ struct dma_chan *dma_get_slave_channel(struct dma_chan *chan) } EXPORT_SYMBOL_GPL(dma_get_slave_channel); -struct dma_chan *dma_get_any_slave_channel(struct dma_device *device) +struct dma_chan *dmadev_get_slave_channel(struct dma_device *device, + dma_filter_fn fn, void *fn_param) { dma_cap_mask_t mask; struct dma_chan *chan; @@ -628,13 +629,13 @@ struct dma_chan *dma_get_any_slave_channel(struct dma_device *device) /* lock against __dma_request_channel */ mutex_lock(&dma_list_mutex); - chan = find_candidate(device, &mask, NULL, NULL); + chan = find_candidate(device, &mask, fn, fn_param); mutex_unlock(&dma_list_mutex); return IS_ERR(chan) ? NULL : chan; } -EXPORT_SYMBOL_GPL(dma_get_any_slave_channel); +EXPORT_SYMBOL_GPL(dmadev_get_slave_channel); /** * __dma_request_channel - try to allocate an exclusive channel diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index c1486564a314..4774b66f2064 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -1541,7 +1541,10 @@ int dmaenginem_async_device_register(struct dma_device *device); void dma_async_device_unregister(struct dma_device *device); void dma_run_dependencies(struct dma_async_tx_descriptor *tx); struct dma_chan *dma_get_slave_channel(struct dma_chan *chan); -struct dma_chan *dma_get_any_slave_channel(struct dma_device *device); +struct dma_chan *dmadev_get_slave_channel(struct dma_device *device, + dma_filter_fn fn, void *fn_param); +#define dma_get_any_slave_channel(device) \ + dmadev_get_slave_channel(device, NULL, NULL) #define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y) #define dma_request_slave_channel_compat(mask, x, y, dev, name) \ __dma_request_slave_channel_compat(&(mask), x, y, dev, name) -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki