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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 68274ff2-a7ee-431a-fd21-08dc04966874 X-MS-Exchange-CrossTenant-AuthSource: AM6PR04MB4838.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Dec 2023 15:38:42.6361 (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: p+B0Jtx3inF1IkIbVdvgNpCJlG3Uj8+o+CoVGLTUsxSOjM0G8V8V2IeirLxOPOR2kN6yzmfUVoJHOujtF4Mm+w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DBAPR04MB7285 Supposed DMA cross 4k bounder problem should be fixed at DEV_VER_V2, but still met problem when do ISO transfer if sg enabled. Data pattern likes below when sg enabled, package size is 1k and mult is 2 [UVC Header(8B) ] [data(3k - 8)] ... The received data at offset 0xd000 will get 0xc000 data, len 0x70. Error happen position as below pattern: 0xd000: wrong 0xe000: wrong 0xf000: correct 0x10000: wrong 0x11000: wrong 0x12000: correct ... To avoid DMA cross 4k bounder at ISO transfer, reduce burst len according to start DMA address's alignment. Cc: stable@vger.kernel.org Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver") Signed-off-by: Frank Li --- drivers/usb/cdns3/cdns3-gadget.c | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c index 4c6893af22dde..aeca902ab6cc4 100644 --- a/drivers/usb/cdns3/cdns3-gadget.c +++ b/drivers/usb/cdns3/cdns3-gadget.c @@ -1120,6 +1120,7 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep, u32 togle_pcs = 1; int sg_iter = 0; int num_trb_req; + int trb_burst; int num_trb; int address; u32 control; @@ -1243,7 +1244,36 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep, total_tdl += DIV_ROUND_UP(length, priv_ep->endpoint.maxpacket); - trb->length |= cpu_to_le32(TRB_BURST_LEN(priv_ep->trb_burst_size) | + trb_burst = priv_ep->trb_burst_size; + + /* + * Supposed DMA cross 4k bounder problem should be fixed at DEV_VER_V2, but still + * met problem when do ISO transfer if sg enabled. + * + * Data pattern likes below when sg enabled, package size is 1k and mult is 2 + * [UVC Header(8B) ] [data(3k - 8)] ... + * + * The received data at offset 0xd000 will get 0xc000 data, len 0x70. Error happen + * as below pattern: + * 0xd000: wrong + * 0xe000: wrong + * 0xf000: correct + * 0x10000: wrong + * 0x11000: wrong + * 0x12000: correct + * ... + * + * But it is still unclear about why error have not happen below 0xd000, it should + * cross 4k bounder. But anyway, the below code can fix this problem. + * + * To avoid DMA cross 4k bounder at ISO transfer, reduce burst len according to 16. + */ + if (priv_ep->type == USB_ENDPOINT_XFER_ISOC && priv_dev->dev_ver <= DEV_VER_V2) + if (ALIGN_DOWN(trb->buffer, SZ_4K) != + ALIGN_DOWN(trb->buffer + length, SZ_4K)) + trb_burst = 16; + + trb->length |= cpu_to_le32(TRB_BURST_LEN(trb_burst) | TRB_LEN(length)); pcs = priv_ep->pcs ? TRB_CYCLE : 0;