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Update the fsl-edma driver to use the common API instead of maintaining its own implementation. Signed-off-by: Frank Li --- drivers/dma/fsl-edma-common.c | 226 ++++++++---------------------------------- drivers/dma/fsl-edma-common.h | 8 -- drivers/dma/fsl-edma-main.c | 4 +- drivers/dma/ll-dma.c | 112 +++++++++++++++++++++ drivers/dma/mcf-edma-main.c | 4 +- drivers/dma/virt-dma.h | 9 ++ 6 files changed, 169 insertions(+), 194 deletions(-) diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c index fdac0518316914d59df592ad26f6000d2034bcb9..643e8bd30b88a2cf66eebf024505428365b8f0ae 100644 --- a/drivers/dma/fsl-edma-common.c +++ b/drivers/dma/fsl-edma-common.c @@ -534,185 +534,55 @@ static int fsl_edma_set_lli(struct dma_ll_desc *desc, u32 idx, iter = 1; disable_req = true; nbytes = len; - } - - if (fsl_edma_drvflags(fsl_chan) & FSL_EDMA_DRV_MEM_REMOTE) - fsl_chan->is_remote = true; - - /* To match with copy_align and max_seg_size so 1 tcd is enough */ - __fsl_edma_fill_tcd(fsl_chan, tcd, src, dst, - fsl_edma_get_tcd_attr(src_bus_width, dst_bus_width), - soff, nbytes, 0, iter, iter, doff, irq, disable_req); - - return 0; -} - -struct dma_async_tx_descriptor *fsl_edma_prep_dma_cyclic( - struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, - size_t period_len, enum dma_transfer_direction direction, - unsigned long flags) -{ - struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); - struct dma_slave_config *cfg = &chan->config; - struct dma_ll_desc *fsl_desc; - dma_addr_t dma_buf_next; - bool major_int = true; - int sg_len, i; - dma_addr_t src_addr, dst_addr, last_sg; - u16 soff, doff, iter; - u32 nbytes; - - if (!is_slave_direction(direction)) - return NULL; - - sg_len = buf_len / period_len; - fsl_desc = vchan_dma_ll_alloc_desc(chan, sg_len, flags); - if (!fsl_desc) - return NULL; - fsl_desc->iscyclic = true; - fsl_desc->dir = direction; - - if (vchan_dma_ll_map_slave_addr(chan, fsl_desc, direction, cfg)) - goto err; - - dma_buf_next = dma_addr; - if (direction == DMA_MEM_TO_DEV) { - if (!cfg->src_addr_width) - cfg->src_addr_width = cfg->dst_addr_width; - fsl_chan->attr = - fsl_edma_get_tcd_attr(cfg->src_addr_width, - cfg->dst_addr_width); - nbytes = cfg->dst_addr_width * cfg->dst_maxburst; } else { - if (!cfg->dst_addr_width) - cfg->dst_addr_width = cfg->src_addr_width; - fsl_chan->attr = - fsl_edma_get_tcd_attr(cfg->src_addr_width, - cfg->dst_addr_width); - nbytes = cfg->src_addr_width * cfg->src_maxburst; - } + enum dma_transfer_direction dir = config->direction; - iter = period_len / nbytes; + if (!desc->iscyclic && idx == desc->n_its - 1) + disable_req = true; + else + disable_req = false; - for (i = 0; i < sg_len; i++) { - if (dma_buf_next >= dma_addr + buf_len) - dma_buf_next = dma_addr; + fsl_chan->is_sw = false; - /* get next sg's physical address */ - last_sg = fsl_desc->its[(i + 1) % sg_len].paddr; + if (dir == DMA_MEM_TO_DEV) { + dst_bus_width = config->dst_addr_width; + if (!config->src_addr_width) + src_bus_width = config->dst_addr_width; + nbytes = config->dst_addr_width * config->dst_maxburst; - if (direction == DMA_MEM_TO_DEV) { - src_addr = dma_buf_next; - dst_addr = fsl_desc->dst.addr; - soff = cfg->dst_addr_width; + soff = config->dst_addr_width; doff = fsl_chan->is_multi_fifo ? 4 : 0; - if (cfg->dst_port_window_size) - doff = cfg->dst_addr_width; - } else if (direction == DMA_DEV_TO_MEM) { - src_addr = fsl_desc->src.addr; - dst_addr = dma_buf_next; + if (config->dst_port_window_size) + doff = config->dst_addr_width; + } else if (dir == DMA_DEV_TO_MEM) { + src_bus_width = config->src_addr_width; + if (!config->dst_addr_width) + dst_bus_width = config->src_addr_width; + nbytes = config->src_addr_width * config->src_maxburst; soff = fsl_chan->is_multi_fifo ? 4 : 0; - doff = cfg->src_addr_width; - if (cfg->src_port_window_size) - soff = cfg->src_addr_width; + doff = config->src_addr_width; + if (config->src_port_window_size) + soff = config->src_addr_width; } else { /* DMA_DEV_TO_DEV */ - src_addr = cfg->src_addr; - dst_addr = cfg->dst_addr; soff = doff = 0; - major_int = false; - } - - fsl_edma_fill_tcd(fsl_chan, fsl_desc->its[i].vaddr, src_addr, dst_addr, - fsl_chan->attr, soff, nbytes, 0, iter, - iter, doff, last_sg, major_int, false, true); - dma_buf_next += period_len; - } - - return __vchan_tx_prep(&fsl_chan->vchan, &fsl_desc->vdesc); - -err: - vchan_dma_ll_free_desc(&fsl_desc->vdesc); - return NULL; -} - -struct dma_async_tx_descriptor *fsl_edma_prep_slave_sg( - struct dma_chan *chan, struct scatterlist *sgl, - unsigned int sg_len, enum dma_transfer_direction direction, - unsigned long flags, void *context) -{ - struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); - struct dma_slave_config *cfg = &chan->config; - struct dma_ll_desc *fsl_desc; - struct scatterlist *sg; - dma_addr_t src_addr, dst_addr, last_sg; - u16 soff, doff, iter; - u32 nbytes; - int i; - - if (!is_slave_direction(direction)) - return NULL; - - fsl_desc = vchan_dma_ll_alloc_desc(chan, sg_len, flags); - if (!fsl_desc) - return NULL; - fsl_desc->iscyclic = false; - fsl_desc->dir = direction; - - if (vchan_dma_ll_map_slave_addr(chan, fsl_desc, direction, cfg)) - goto err; - - if (direction == DMA_MEM_TO_DEV) { - if (!cfg->src_addr_width) - cfg->src_addr_width = cfg->dst_addr_width; - fsl_chan->attr = - fsl_edma_get_tcd_attr(cfg->src_addr_width, - cfg->dst_addr_width); - nbytes = cfg->dst_addr_width * - cfg->dst_maxburst; - } else { - if (!cfg->dst_addr_width) - cfg->dst_addr_width = cfg->src_addr_width; - fsl_chan->attr = - fsl_edma_get_tcd_attr(cfg->src_addr_width, - cfg->dst_addr_width); - nbytes = cfg->src_addr_width * - cfg->src_maxburst; - } - - for_each_sg(sgl, sg, sg_len, i) { - if (direction == DMA_MEM_TO_DEV) { - src_addr = sg_dma_address(sg); - dst_addr = fsl_desc->dst.addr; - soff = cfg->dst_addr_width; - doff = 0; - } else if (direction == DMA_DEV_TO_MEM) { - src_addr = fsl_desc->src.addr; - dst_addr = sg_dma_address(sg); - soff = 0; - doff = cfg->src_addr_width; - } else { - /* DMA_DEV_TO_DEV */ - src_addr = cfg->src_addr; - dst_addr = cfg->dst_addr; - soff = 0; - doff = 0; + irq = false; } - /* - * Choose the suitable burst length if sg_dma_len is not - * multiple of burst length so that the whole transfer length is - * multiple of minor loop(burst length). - */ - if (sg_dma_len(sg) % nbytes) { - u32 width = (direction == DMA_DEV_TO_MEM) ? doff : soff; - u32 burst = (direction == DMA_DEV_TO_MEM) ? - cfg->src_maxburst : - cfg->dst_maxburst; + /* + * Choose the suitable burst length if sg_dma_len is not + * multiple of burst length so that the whole transfer length is + * multiple of minor loop(burst length). + */ + if (len % nbytes) { + u32 width = (dir == DMA_DEV_TO_MEM) ? doff : soff; + u32 burst = (dir == DMA_DEV_TO_MEM) ? + config->src_maxburst : + config->dst_maxburst; int j; for (j = burst; j > 1; j--) { - if (!(sg_dma_len(sg) % (j * width))) { + if (!(len % (j * width))) { nbytes = j * width; break; } @@ -721,27 +591,19 @@ struct dma_async_tx_descriptor *fsl_edma_prep_slave_sg( if (j == 1) nbytes = width; } - iter = sg_dma_len(sg) / nbytes; - if (i < sg_len - 1) { - last_sg = fsl_desc->its[(i + 1)].paddr; - fsl_edma_fill_tcd(fsl_chan, fsl_desc->its[i].vaddr, src_addr, - dst_addr, fsl_chan->attr, soff, - nbytes, 0, iter, iter, doff, last_sg, - false, false, true); - } else { - last_sg = 0; - fsl_edma_fill_tcd(fsl_chan, fsl_desc->its[i].vaddr, src_addr, - dst_addr, fsl_chan->attr, soff, - nbytes, 0, iter, iter, doff, last_sg, - true, true, false); - } + + iter = len / nbytes; } - return __vchan_tx_prep(&fsl_chan->vchan, &fsl_desc->vdesc); + if (fsl_edma_drvflags(fsl_chan) & FSL_EDMA_DRV_MEM_REMOTE) + fsl_chan->is_remote = true; + + /* To match with copy_align and max_seg_size so 1 tcd is enough */ + __fsl_edma_fill_tcd(fsl_chan, tcd, src, dst, + fsl_edma_get_tcd_attr(src_bus_width, dst_bus_width), + soff, nbytes, 0, iter, iter, doff, irq, disable_req); -err: - vchan_dma_ll_free_desc(&fsl_desc->vdesc); - return NULL; + return 0; } void fsl_edma_xfer_desc(struct fsl_edma_chan *fsl_chan) diff --git a/drivers/dma/fsl-edma-common.h b/drivers/dma/fsl-edma-common.h index 7cba3bc0d39537e675167b42dda644647bf63819..b5bfd3162237bb9dd585bbf91e6f9f73f0376112 100644 --- a/drivers/dma/fsl-edma-common.h +++ b/drivers/dma/fsl-edma-common.h @@ -469,14 +469,6 @@ int fsl_edma_slave_config(struct dma_chan *chan, struct dma_slave_config *cfg); enum dma_status fsl_edma_tx_status(struct dma_chan *chan, dma_cookie_t cookie, struct dma_tx_state *txstate); -struct dma_async_tx_descriptor *fsl_edma_prep_dma_cyclic( - struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, - size_t period_len, enum dma_transfer_direction direction, - unsigned long flags); -struct dma_async_tx_descriptor *fsl_edma_prep_slave_sg( - struct dma_chan *chan, struct scatterlist *sgl, - unsigned int sg_len, enum dma_transfer_direction direction, - unsigned long flags, void *context); void fsl_edma_xfer_desc(struct fsl_edma_chan *fsl_chan); void fsl_edma_issue_pending(struct dma_chan *chan); int fsl_edma_alloc_chan_resources(struct dma_chan *chan); diff --git a/drivers/dma/fsl-edma-main.c b/drivers/dma/fsl-edma-main.c index 1724a2d1449fe1850d460cefae5899a5ab828afd..e405aa96e625702673b5fc64e1102b50d18eb894 100644 --- a/drivers/dma/fsl-edma-main.c +++ b/drivers/dma/fsl-edma-main.c @@ -848,8 +848,8 @@ static int fsl_edma_probe(struct platform_device *pdev) fsl_edma->dma_dev.device_free_chan_resources = fsl_edma_free_chan_resources; fsl_edma->dma_dev.device_tx_status = fsl_edma_tx_status; - fsl_edma->dma_dev.device_prep_slave_sg = fsl_edma_prep_slave_sg; - fsl_edma->dma_dev.device_prep_dma_cyclic = fsl_edma_prep_dma_cyclic; + fsl_edma->dma_dev.device_prep_slave_sg = vchan_dma_ll_prep_slave_sg; + fsl_edma->dma_dev.device_prep_dma_cyclic = vchan_dma_ll_prep_slave_cyclic; fsl_edma->dma_dev.device_prep_dma_memcpy = vchan_dma_ll_prep_memcpy; fsl_edma->dma_dev.device_config = fsl_edma_slave_config; fsl_edma->dma_dev.device_pause = fsl_edma_pause; diff --git a/drivers/dma/ll-dma.c b/drivers/dma/ll-dma.c index 66e4222ac528f871c75a508c68895078fa38cf7b..de289e10468b9c0e6ab6c15b1bd49ab2b627e59d 100644 --- a/drivers/dma/ll-dma.c +++ b/drivers/dma/ll-dma.c @@ -216,6 +216,118 @@ vchan_dma_ll_prep_memcpy(struct dma_chan *chan, } EXPORT_SYMBOL_GPL(vchan_dma_ll_prep_memcpy); +static dma_addr_t +vchan_dma_get_src_addr(struct dma_ll_desc *desc, dma_addr_t addr, + enum dma_transfer_direction dir) +{ + if (dir == DMA_DEV_TO_MEM || dir == DMA_DEV_TO_DEV) + return desc->src.addr; + + return addr; +} + +static dma_addr_t +vchan_dma_get_dst_addr(struct dma_ll_desc *desc, dma_addr_t addr, + enum dma_transfer_direction dir) +{ + if (dir == DMA_MEM_TO_DEV || dir == DMA_DEV_TO_DEV) + return desc->dst.addr; + + return addr; +} + +struct dma_async_tx_descriptor * +vchan_dma_ll_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, + unsigned int sg_len, enum dma_transfer_direction dir, + unsigned long flags, void *context) +{ + struct virt_dma_chan *vchan = to_virt_chan(chan); + struct dma_slave_config *config = &chan->config; + struct dma_ll_desc *desc; + struct scatterlist *sg; + int i, ret; + + if (!is_slave_direction(dir)) + return NULL; + + desc = vchan_dma_ll_alloc_desc(chan, sg_len, flags); + if (!desc) + return NULL; + desc->iscyclic = false; + desc->dir = dir; + + if (vchan_dma_ll_map_slave_addr(chan, desc, dir, config)) + goto err; + + for_each_sg(sgl, sg, sg_len, i) { + dma_addr_t addr = sg_dma_address(sg); + + ret = vchan->ll.ops->set_lli(desc, i, + vchan_dma_get_src_addr(desc, addr, dir), + vchan_dma_get_dst_addr(desc, addr, dir), + sg_dma_len(sg), + i == sg_len - 1, config); + if (ret) + goto err; + } + + return __vchan_tx_prep(vchan, &desc->vdesc); + +err: + vchan_dma_ll_free_desc(&desc->vdesc); + return NULL; +} +EXPORT_SYMBOL_GPL(vchan_dma_ll_prep_slave_sg); + +struct dma_async_tx_descriptor * +vchan_dma_ll_prep_slave_cyclic(struct dma_chan *chan, dma_addr_t dma_addr, + size_t buf_len, size_t period_len, + enum dma_transfer_direction dir, + unsigned long flags) +{ + struct virt_dma_chan *vchan = to_virt_chan(chan); + struct dma_slave_config *config = &chan->config; + dma_addr_t addr = dma_addr; + struct dma_ll_desc *desc; + int nItems; + int i, ret; + + if (!is_slave_direction(dir)) + return NULL; + + nItems = buf_len / period_len; + desc = vchan_dma_ll_alloc_desc(chan, nItems, flags); + if (!desc) + return NULL; + desc->iscyclic = true; + desc->dir = dir; + + if (vchan_dma_ll_map_slave_addr(chan, desc, dir, config)) + goto err; + + for (i = 0; i < nItems; i++) { + ret = vchan->ll.ops->set_lli(desc, i, + vchan_dma_get_src_addr(desc, addr, dir), + vchan_dma_get_dst_addr(desc, addr, dir), + period_len, true, config); + if (ret) + goto err; + + addr += period_len; + } + + ret = vchan->ll.ops->set_ll_next(desc, nItems - 1, desc->its[0].paddr); + if (ret) + goto err; + + return __vchan_tx_prep(vchan, &desc->vdesc); + +err: + vchan_dma_ll_free_desc(&desc->vdesc); + return NULL; +} +EXPORT_SYMBOL_GPL(vchan_dma_ll_prep_slave_cyclic); + int vchan_dma_ll_terminate_all(struct dma_chan *chan) { struct virt_dma_chan *vchan = to_virt_chan(chan); diff --git a/drivers/dma/mcf-edma-main.c b/drivers/dma/mcf-edma-main.c index 60c5b928ade74d36c8f4206777921544787f6cd8..6d68dfd97b47c88d2499540b10564b964820b807 100644 --- a/drivers/dma/mcf-edma-main.c +++ b/drivers/dma/mcf-edma-main.c @@ -221,8 +221,8 @@ static int mcf_edma_probe(struct platform_device *pdev) fsl_edma_free_chan_resources; mcf_edma->dma_dev.device_config = fsl_edma_slave_config; mcf_edma->dma_dev.device_prep_dma_cyclic = - fsl_edma_prep_dma_cyclic; - mcf_edma->dma_dev.device_prep_slave_sg = fsl_edma_prep_slave_sg; + vchan_dma_ll_prep_slave_cyclic; + mcf_edma->dma_dev.device_prep_slave_sg = vchan_dma_ll_prep_slave_sg; mcf_edma->dma_dev.device_tx_status = fsl_edma_tx_status; mcf_edma->dma_dev.device_pause = fsl_edma_pause; mcf_edma->dma_dev.device_resume = fsl_edma_resume; diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h index 0a18663dc95f323f7a9bab76f2d730701277371a..d1bb130f0fd798f8ec78cc8f88da3f8d1ae74625 100644 --- a/drivers/dma/virt-dma.h +++ b/drivers/dma/virt-dma.h @@ -308,6 +308,15 @@ struct dma_async_tx_descriptor * vchan_dma_ll_prep_memcpy(struct dma_chan *chan, dma_addr_t dma_dst, dma_addr_t dma_src, size_t len, unsigned long flags); +struct dma_async_tx_descriptor * +vchan_dma_ll_prep_slave_cyclic(struct dma_chan *chan, dma_addr_t dma_addr, + size_t buf_len, size_t period_len, + enum dma_transfer_direction dir, + unsigned long flags); +struct dma_async_tx_descriptor * +vchan_dma_ll_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, + unsigned int sg_len, enum dma_transfer_direction dir, + unsigned long flags, void *context); void vchan_dma_ll_free_desc(struct virt_dma_desc *vdesc); int vchan_dma_ll_terminate_all(struct dma_chan *chan); int vchan_dma_ll_map_slave_addr(struct dma_chan *chan, struct dma_ll_desc *desc, -- 2.34.1