linux-kernel - [PATCH v2] dmaengine: dw-edma: Add HDMA NATIVE map check

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Message-ID: <20250430092540.207522-1-devverma@amd.com>
Date: Wed, 30 Apr 2025 14:55:40 +0530
From: Devendra K Verma <devverma@....com>
To: <devverma@....com>
CC: <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<manivannan.sadhasivam@...aro.org>, <michal.simek@....com>,
	<vkoul@...nel.org>
Subject: [PATCH v2] dmaengine: dw-edma: Add HDMA NATIVE map check

The HDMA IP supports the HDMA_NATIVE map format as part of Vendor-Specific
Extended Capability. Added the check for HDMA_NATIVE map format.
The check for map format enables the IP specific function invocation
during the DMA ops.

Signed-off-by: Devendra K Verma <devverma@....com>
---
Changes in v2
Addressed the review comments and added the 'Debug info' for
HDMA_NATIVE in dw_edma_pcie_probe().
---
 drivers/dma/dw-edma/dw-edma-pcie.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index 1c6043751dc9..49f09998e5c0 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -136,7 +136,8 @@ static void dw_edma_pcie_get_vsec_dma_data(struct pci_dev *pdev,
 	map = FIELD_GET(DW_PCIE_VSEC_DMA_MAP, val);
 	if (map != EDMA_MF_EDMA_LEGACY &&
 	    map != EDMA_MF_EDMA_UNROLL &&
-	    map != EDMA_MF_HDMA_COMPAT)
+	    map != EDMA_MF_HDMA_COMPAT &&
+	    map != EDMA_MF_HDMA_NATIVE)
 		return;
 
 	pdata->mf = map;
@@ -291,6 +292,8 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 		pci_dbg(pdev, "Version:\teDMA Unroll (0x%x)\n", chip->mf);
 	else if (chip->mf == EDMA_MF_HDMA_COMPAT)
 		pci_dbg(pdev, "Version:\tHDMA Compatible (0x%x)\n", chip->mf);
+	else if (chip->mf == EDMA_MF_HDMA_NATIVE)
+		pci_dbg(pdev, "Version:\tHDMA Native (0x%x)\n", chip->mf);
 	else
 		pci_dbg(pdev, "Version:\tUnknown (0x%x)\n", chip->mf);
 
-- 
2.43.0