diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0398-dmaengine-bcm2835-add-dma_memcopy-support-to-bcm2835.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.4/0398-dmaengine-bcm2835-add-dma_memcopy-support-to-bcm2835.patch | 87 |
1 files changed, 0 insertions, 87 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0398-dmaengine-bcm2835-add-dma_memcopy-support-to-bcm2835.patch b/target/linux/brcm2708/patches-4.4/0398-dmaengine-bcm2835-add-dma_memcopy-support-to-bcm2835.patch deleted file mode 100644 index 5d063a9c8a..0000000000 --- a/target/linux/brcm2708/patches-4.4/0398-dmaengine-bcm2835-add-dma_memcopy-support-to-bcm2835.patch +++ /dev/null @@ -1,87 +0,0 @@ -From 5e439596e0a4a5a14556d8b3f246e7204a8f3cd0 Mon Sep 17 00:00:00 2001 -From: Martin Sperl <kernel@martin.sperl.org> -Date: Wed, 16 Mar 2016 12:25:02 -0700 -Subject: [PATCH] dmaengine: bcm2835: add dma_memcopy support to bcm2835-dma - -Also added check for an error condition in bcm2835_dma_create_cb_chain -that showed up during development of this patch. - -Tested using dmatest for all enabled channels. - -Signed-off-by: Martin Sperl <kernel@martin.sperl.org> -Reviewed-by: Eric Anholt <eric@anholt.net> -Signed-off-by: Eric Anholt <eric@anholt.net> -Signed-off-by: Vinod Koul <vinod.koul@intel.com> ---- - drivers/dma/bcm2835-dma.c | 36 +++++++++++++++++++++++++++++++++++- - 1 file changed, 35 insertions(+), 1 deletion(-) - ---- a/drivers/dma/bcm2835-dma.c -+++ b/drivers/dma/bcm2835-dma.c -@@ -310,6 +310,9 @@ static struct bcm2835_desc *bcm2835_dma_ - struct bcm2835_cb_entry *cb_entry; - struct bcm2835_dma_cb *control_block; - -+ if (!frames) -+ return NULL; -+ - /* allocate and setup the descriptor. */ - d = kzalloc(sizeof(*d) + frames * sizeof(struct bcm2835_cb_entry), - gfp); -@@ -597,6 +600,34 @@ static void bcm2835_dma_issue_pending(st - spin_unlock_irqrestore(&c->vc.lock, flags); - } - -+struct dma_async_tx_descriptor *bcm2835_dma_prep_dma_memcpy( -+ struct dma_chan *chan, dma_addr_t dst, dma_addr_t src, -+ size_t len, unsigned long flags) -+{ -+ struct bcm2835_chan *c = to_bcm2835_dma_chan(chan); -+ struct bcm2835_desc *d; -+ u32 info = BCM2835_DMA_D_INC | BCM2835_DMA_S_INC; -+ u32 extra = BCM2835_DMA_INT_EN | BCM2835_DMA_WAIT_RESP; -+ size_t max_len = bcm2835_dma_max_frame_length(c); -+ size_t frames; -+ -+ /* if src, dst or len is not given return with an error */ -+ if (!src || !dst || !len) -+ return NULL; -+ -+ /* calculate number of frames */ -+ frames = bcm2835_dma_frames_for_length(len, max_len); -+ -+ /* allocate the CB chain - this also fills in the pointers */ -+ d = bcm2835_dma_create_cb_chain(chan, DMA_MEM_TO_MEM, false, -+ info, extra, frames, -+ src, dst, len, 0, GFP_KERNEL); -+ if (!d) -+ return NULL; -+ -+ return vchan_tx_prep(&c->vc, &d->vd, flags); -+} -+ - static struct dma_async_tx_descriptor *bcm2835_dma_prep_slave_sg( - struct dma_chan *chan, - struct scatterlist *sgl, unsigned int sg_len, -@@ -880,17 +911,20 @@ static int bcm2835_dma_probe(struct plat - dma_cap_set(DMA_PRIVATE, od->ddev.cap_mask); - dma_cap_set(DMA_CYCLIC, od->ddev.cap_mask); - dma_cap_set(DMA_SLAVE, od->ddev.cap_mask); -+ dma_cap_set(DMA_MEMCPY, od->ddev.cap_mask); - od->ddev.device_alloc_chan_resources = bcm2835_dma_alloc_chan_resources; - od->ddev.device_free_chan_resources = bcm2835_dma_free_chan_resources; - od->ddev.device_tx_status = bcm2835_dma_tx_status; - od->ddev.device_issue_pending = bcm2835_dma_issue_pending; - od->ddev.device_prep_dma_cyclic = bcm2835_dma_prep_dma_cyclic; - od->ddev.device_prep_slave_sg = bcm2835_dma_prep_slave_sg; -+ od->ddev.device_prep_dma_memcpy = bcm2835_dma_prep_dma_memcpy; - od->ddev.device_config = bcm2835_dma_slave_config; - od->ddev.device_terminate_all = bcm2835_dma_terminate_all; - od->ddev.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); - od->ddev.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); -- od->ddev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); -+ od->ddev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV) | -+ BIT(DMA_MEM_TO_MEM); - od->ddev.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; - od->ddev.dev = &pdev->dev; - INIT_LIST_HEAD(&od->ddev.channels); |