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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: khYpSZcSiwc7k1/4GGDukIOshPAwJMuzlteefNFY+jUq3uus6VlIxOEOglErzcEeWs8Fzn4zNK5GxLhjp44E0LDQgVl87qoqKmTat8iUFOsgVrYi9xm4Iow6g1zoNc7jRT1vGzNZJmHyNTc4KqIZEJYTC8+MrOrMbM9/eLiT8kdfumj/cSvnWWig3hXVYyISOP7HqpVJjwtIsTMnWKIkhiSoOpjNLngvTDLhorWzEVnZhN1++WRhxBnGP+7Ai4yjDRjYhH7rFmTcoyCjUU4HKB+ejRbJ4Ztjp198AcPj7ttBNC8sJyfJoQLyrAbVn+TkonnH/ermmMCN9MFQElzlsqz1m3A/NOdKtH8DHBsJhMDou90s2aJBgV3W8QrKD8YrcVN9E/9X0EU+zXkvInIf6KABOFItczXslx5rJESLjlzYv7fzH3ZqrbGCUygS+hiJKy3XZtoFXgqjNmn1s3EUZDsAKR+fisL4j9L0hSwFKOjJLS9GZ7fYyBOhLSLlb96atP3oB5cvuWoX92jxP0KunmX59Xvolg0blgYp7sJppi0Z3JUp8VfJaw3ObBMqejsOUTeFATi0sGABon+FBwWmAsMk09Cc0me+lcaDlCJzd9WkEqmV1nZPTOoif7KNzsbp+5k9VOFzdzTSeUFhzLok40PiOdQmRYwoPZtnHw4HBZ1+8mpYiYyFyWQL+mn5SCUTGh2rw9AZBf2nCxK0Q1goxL1uDdr5OuBHZIsDFkdxhn5l1ejlCK8UYsKmHiblfXI59Xd16aKaR1Az1mmrWCq32OzlUYURcAfzJ4i3JAO2TMlXdIXcRYDIVRCaPZAd0q2jecHBYoriqO7C0kR7jUmEgvYabL1ixXBX+eVltL+4LGv8iuiUy2xuLgYke/jMANo/5HeTidvMOAlO6rBFwJLgvxoXMGJRCmx5Rhb2aivLQZnMy/x4p+bOjJ9iioUt1QQP5nXm+RE6meTSmNtiJgzGavkNL/L0WKsXoorYCLLinqy/WhiO5cRtr9DzB0VjYJROhLusIBFXnJgpzinhONpUdV3yi1VwEYBZ/GQ36tKyhPqO7VK6rh9LcdssRaDjqX1cHITnD921yKN1olTxQvcavWSaZGo8AjggmE3nzFyxeqoEWkLgco7ZiMCzLa3OsFBuswzeMTFSlThRGYsnwLwvJmSiezj+JwtbT3r5o2bvvbxbCmmlNYc6z+dgcOcPPGjraTDIC2coS81oUH9D/2EK4Lmt6KgWGhGx5YE4zoN5a1s2/ApAF6MabaGu9uaA87qShte2vJXlB4jwgtbBbrXXeB1gmYE77uB9T6of1OUlpBeaTo4xrZKL4nl1vsC+Q5bo/B6YT6t6IQo7MbcLF6FGN3VIjgRrCOVSPj4HSZ4WBpkBpUsTaAdU5Y2Mq2DUGsEyyD6UE9Sti2vwo3B+lE54sfWYJx0teRwL3YtokRxONcM2GnELn9aa3GXmzGDAmvHlTGspkjOMWBUbHnH/Oj257KhEnxVqdenNNOdBqg5gXDNd4eSXreQWL7G0Qn6ZTrOeUQ5rgjwPMrP4wKfBd/ccPLrsnb3IObpjUWKINOzkMWJb0a7aO/BPxQZ+iqkmbM8N7voX23qaFwNipD8pFxTmnX8lrLTkE8As/kHVi6Zthhg= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 775652ea-959a-4750-a484-08da00570560 X-MS-Exchange-CrossTenant-AuthSource: PAXPR04MB9186.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Mar 2022 16:24:58.6844 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 6gfxl9Ekt+8asycLPxj5fggx0oZRjfFHNL9ZoIMdKa0iXveXS+Xb8Kog4pkSkZT1NL+FHRefcU9AZmUO+IfDSQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR04MB4530 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Manivannan Sadhasivam When eDMA is controlled by the Endpoint (EP), the current logic incorrectly programs the source and destination addresses for read and write. Since the Root complex and Endpoint uses the opposite channels for read/write, fix the issue by finding out the read operation first and program the eDMA accordingly. Cc: stable@vger.kernel.org Fixes: bd96f1b2f43a ("dmaengine: dw-edma: support local dma device transfer semantics") Fixes: e63d79d1ffcd ("dmaengine: Add Synopsys eDMA IP core driver") Signed-off-by: Manivannan Sadhasivam --- Change from V1-v3 - Direct pick up from Manivannan drivers/dma/dw-edma/dw-edma-core.c | 32 +++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c index 0cb66434f9e14..3636c48f5df15 100644 --- a/drivers/dma/dw-edma/dw-edma-core.c +++ b/drivers/dma/dw-edma/dw-edma-core.c @@ -334,6 +334,7 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer) struct dw_edma_chunk *chunk; struct dw_edma_burst *burst; struct dw_edma_desc *desc; + bool read = false; u32 cnt = 0; int i; @@ -424,7 +425,36 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer) chunk->ll_region.sz += burst->sz; desc->alloc_sz += burst->sz; - if (chan->dir == EDMA_DIR_WRITE) { + /**************************************************************** + * + * Root Complex Endpoint + * +-----------------------+ +----------------------+ + * | | TX CH | | + * | | | | + * | DEV_TO_MEM <-------------+ MEM_TO_DEV | + * | | | | + * | | | | + * | MEM_TO_DEV +-------------> DEV_TO_MEM | + * | | | | + * | | RX CH | | + * +-----------------------+ +----------------------+ + * + * If eDMA is controlled by the Root complex, TX channel + * (EDMA_DIR_WRITE) is used for memory read (DEV_TO_MEM) and RX + * channel (EDMA_DIR_READ) is used for memory write (MEM_TO_DEV). + * + * If eDMA is controlled by the endpoint, RX channel + * (EDMA_DIR_READ) is used for memory read (DEV_TO_MEM) and TX + * channel (EDMA_DIR_WRITE) is used for memory write (MEM_TO_DEV). + * + ****************************************************************/ + + if ((dir == DMA_DEV_TO_MEM && chan->dir == EDMA_DIR_READ) || + (dir == DMA_DEV_TO_MEM && chan->dir == EDMA_DIR_WRITE)) + read = true; + + /* Program the source and destination addresses for DMA read/write */ + if (read) { burst->sar = src_addr; if (xfer->type == EDMA_XFER_CYCLIC) { burst->dar = xfer->xfer.cyclic.paddr;