From b08ded2ef2e98768d5ee5f71da8fe768b1f7774b Mon Sep 17 00:00:00 2001 From: Manivannan Sadhasivam Date: Thu, 17 Aug 2023 23:24:52 +0530 Subject: bus: mhi: ep: Pass mhi_ep_buf_info struct to read/write APIs In the preparation of DMA async support, let's pass the parameters to read_from_host() and write_to_host() APIs using mhi_ep_buf_info structure. No functional change. Signed-off-by: Manivannan Sadhasivam --- drivers/pci/endpoint/functions/pci-epf-mhi.c | 66 +++++++++++++++------------- 1 file changed, 35 insertions(+), 31 deletions(-) (limited to 'drivers/pci/endpoint') diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c index b7b9d3e21f97..ec5f4a38178b 100644 --- a/drivers/pci/endpoint/functions/pci-epf-mhi.c +++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c @@ -209,28 +209,28 @@ static void pci_epf_mhi_raise_irq(struct mhi_ep_cntrl *mhi_cntrl, u32 vector) vector + 1); } -static int pci_epf_mhi_iatu_read(struct mhi_ep_cntrl *mhi_cntrl, u64 from, - void *to, size_t size) +static int pci_epf_mhi_iatu_read(struct mhi_ep_cntrl *mhi_cntrl, + struct mhi_ep_buf_info *buf_info) { struct pci_epf_mhi *epf_mhi = to_epf_mhi(mhi_cntrl); - size_t offset = get_align_offset(epf_mhi, from); + size_t offset = get_align_offset(epf_mhi, buf_info->host_addr); void __iomem *tre_buf; phys_addr_t tre_phys; int ret; mutex_lock(&epf_mhi->lock); - ret = __pci_epf_mhi_alloc_map(mhi_cntrl, from, &tre_phys, &tre_buf, - offset, size); + ret = __pci_epf_mhi_alloc_map(mhi_cntrl, buf_info->host_addr, &tre_phys, + &tre_buf, offset, buf_info->size); if (ret) { mutex_unlock(&epf_mhi->lock); return ret; } - memcpy_fromio(to, tre_buf, size); + memcpy_fromio(buf_info->dev_addr, tre_buf, buf_info->size); - __pci_epf_mhi_unmap_free(mhi_cntrl, from, tre_phys, tre_buf, offset, - size); + __pci_epf_mhi_unmap_free(mhi_cntrl, buf_info->host_addr, tre_phys, + tre_buf, offset, buf_info->size); mutex_unlock(&epf_mhi->lock); @@ -238,27 +238,27 @@ static int pci_epf_mhi_iatu_read(struct mhi_ep_cntrl *mhi_cntrl, u64 from, } static int pci_epf_mhi_iatu_write(struct mhi_ep_cntrl *mhi_cntrl, - void *from, u64 to, size_t size) + struct mhi_ep_buf_info *buf_info) { struct pci_epf_mhi *epf_mhi = to_epf_mhi(mhi_cntrl); - size_t offset = get_align_offset(epf_mhi, to); + size_t offset = get_align_offset(epf_mhi, buf_info->host_addr); void __iomem *tre_buf; phys_addr_t tre_phys; int ret; mutex_lock(&epf_mhi->lock); - ret = __pci_epf_mhi_alloc_map(mhi_cntrl, to, &tre_phys, &tre_buf, - offset, size); + ret = __pci_epf_mhi_alloc_map(mhi_cntrl, buf_info->host_addr, &tre_phys, + &tre_buf, offset, buf_info->size); if (ret) { mutex_unlock(&epf_mhi->lock); return ret; } - memcpy_toio(tre_buf, from, size); + memcpy_toio(tre_buf, buf_info->dev_addr, buf_info->size); - __pci_epf_mhi_unmap_free(mhi_cntrl, to, tre_phys, tre_buf, offset, - size); + __pci_epf_mhi_unmap_free(mhi_cntrl, buf_info->host_addr, tre_phys, + tre_buf, offset, buf_info->size); mutex_unlock(&epf_mhi->lock); @@ -270,8 +270,8 @@ static void pci_epf_mhi_dma_callback(void *param) complete(param); } -static int pci_epf_mhi_edma_read(struct mhi_ep_cntrl *mhi_cntrl, u64 from, - void *to, size_t size) +static int pci_epf_mhi_edma_read(struct mhi_ep_cntrl *mhi_cntrl, + struct mhi_ep_buf_info *buf_info) { struct pci_epf_mhi *epf_mhi = to_epf_mhi(mhi_cntrl); struct device *dma_dev = epf_mhi->epf->epc->dev.parent; @@ -284,13 +284,13 @@ static int pci_epf_mhi_edma_read(struct mhi_ep_cntrl *mhi_cntrl, u64 from, dma_addr_t dst_addr; int ret; - if (size < SZ_4K) - return pci_epf_mhi_iatu_read(mhi_cntrl, from, to, size); + if (buf_info->size < SZ_4K) + return pci_epf_mhi_iatu_read(mhi_cntrl, buf_info); mutex_lock(&epf_mhi->lock); config.direction = DMA_DEV_TO_MEM; - config.src_addr = from; + config.src_addr = buf_info->host_addr; ret = dmaengine_slave_config(chan, &config); if (ret) { @@ -298,14 +298,16 @@ static int pci_epf_mhi_edma_read(struct mhi_ep_cntrl *mhi_cntrl, u64 from, goto err_unlock; } - dst_addr = dma_map_single(dma_dev, to, size, DMA_FROM_DEVICE); + dst_addr = dma_map_single(dma_dev, buf_info->dev_addr, buf_info->size, + DMA_FROM_DEVICE); ret = dma_mapping_error(dma_dev, dst_addr); if (ret) { dev_err(dev, "Failed to map remote memory\n"); goto err_unlock; } - desc = dmaengine_prep_slave_single(chan, dst_addr, size, DMA_DEV_TO_MEM, + desc = dmaengine_prep_slave_single(chan, dst_addr, buf_info->size, + DMA_DEV_TO_MEM, DMA_CTRL_ACK | DMA_PREP_INTERRUPT); if (!desc) { dev_err(dev, "Failed to prepare DMA\n"); @@ -332,15 +334,15 @@ static int pci_epf_mhi_edma_read(struct mhi_ep_cntrl *mhi_cntrl, u64 from, } err_unmap: - dma_unmap_single(dma_dev, dst_addr, size, DMA_FROM_DEVICE); + dma_unmap_single(dma_dev, dst_addr, buf_info->size, DMA_FROM_DEVICE); err_unlock: mutex_unlock(&epf_mhi->lock); return ret; } -static int pci_epf_mhi_edma_write(struct mhi_ep_cntrl *mhi_cntrl, void *from, - u64 to, size_t size) +static int pci_epf_mhi_edma_write(struct mhi_ep_cntrl *mhi_cntrl, + struct mhi_ep_buf_info *buf_info) { struct pci_epf_mhi *epf_mhi = to_epf_mhi(mhi_cntrl); struct device *dma_dev = epf_mhi->epf->epc->dev.parent; @@ -353,13 +355,13 @@ static int pci_epf_mhi_edma_write(struct mhi_ep_cntrl *mhi_cntrl, void *from, dma_addr_t src_addr; int ret; - if (size < SZ_4K) - return pci_epf_mhi_iatu_write(mhi_cntrl, from, to, size); + if (buf_info->size < SZ_4K) + return pci_epf_mhi_iatu_write(mhi_cntrl, buf_info); mutex_lock(&epf_mhi->lock); config.direction = DMA_MEM_TO_DEV; - config.dst_addr = to; + config.dst_addr = buf_info->host_addr; ret = dmaengine_slave_config(chan, &config); if (ret) { @@ -367,14 +369,16 @@ static int pci_epf_mhi_edma_write(struct mhi_ep_cntrl *mhi_cntrl, void *from, goto err_unlock; } - src_addr = dma_map_single(dma_dev, from, size, DMA_TO_DEVICE); + src_addr = dma_map_single(dma_dev, buf_info->dev_addr, buf_info->size, + DMA_TO_DEVICE); ret = dma_mapping_error(dma_dev, src_addr); if (ret) { dev_err(dev, "Failed to map remote memory\n"); goto err_unlock; } - desc = dmaengine_prep_slave_single(chan, src_addr, size, DMA_MEM_TO_DEV, + desc = dmaengine_prep_slave_single(chan, src_addr, buf_info->size, + DMA_MEM_TO_DEV, DMA_CTRL_ACK | DMA_PREP_INTERRUPT); if (!desc) { dev_err(dev, "Failed to prepare DMA\n"); @@ -401,7 +405,7 @@ static int pci_epf_mhi_edma_write(struct mhi_ep_cntrl *mhi_cntrl, void *from, } err_unmap: - dma_unmap_single(dma_dev, src_addr, size, DMA_FROM_DEVICE); + dma_unmap_single(dma_dev, src_addr, buf_info->size, DMA_FROM_DEVICE); err_unlock: mutex_unlock(&epf_mhi->lock); -- cgit v1.2.3