linux-kernel - [PATCH v3 10/15] dmaengine: dw-edma: Change linked list and data blocks offset and sizes

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Date:   Wed,  3 Feb 2021 18:57:02 +0100
From:   Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>
To:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        dmaengine@...r.kernel.org, Vinod Koul <vkoul@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>
Subject: [PATCH v3 10/15] dmaengine: dw-edma: Change linked list and data blocks offset and sizes

Changes the linked list and data blocks offset and sizes to follow the
recommendation given by the hardware team for the IPK solution.

Although the previous data blocks offset and sizes are still valid and
functional, using them that might present some issues related to the IPK
solution, since this solution is based on FPGA and might be subjected to
timmings constrains.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
---
 drivers/dma/dw-edma/dw-edma-pcie.c | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index a0fa809..686b4ff 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -59,29 +59,29 @@ static const struct dw_edma_pcie_data snps_edda_data = {
 	.rg.sz				= 0x00002000,	/*  8 Kbytes */
 	/* eDMA memory linked list location */
 	.ll_wr = {
-		/* Channel 0 - BAR 2, offset 0 Mbytes, size 2 Mbytes */
-		DW_BLOCK(BAR_2, 0x00000000, 0x00200000)
-		/* Channel 1 - BAR 2, offset 2 Mbytes, size 2 Mbytes */
-		DW_BLOCK(BAR_2, 0x00200000, 0x00200000)
+		/* Channel 0 - BAR 2, offset 0 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00000000, 0x00000800)
+		/* Channel 1 - BAR 2, offset 2 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00200000, 0x00000800)
 	},
 	.ll_rd = {
-		/* Channel 0 - BAR 2, offset 4 Mbytes, size 2 Mbytes */
-		DW_BLOCK(BAR_2, 0x00400000, 0x00200000)
-		/* Channel 1 - BAR 2, offset 6 Mbytes, size 2 Mbytes */
-		DW_BLOCK(BAR_2, 0x00600000, 0x00200000)
+		/* Channel 0 - BAR 2, offset 4 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00400000, 0x00000800)
+		/* Channel 1 - BAR 2, offset 6 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00600000, 0x00000800)
 	},
 	/* eDMA memory data location */
 	.dt_wr = {
-		/* Channel 0 - BAR 2, offset 8 Mbytes, size 14 Mbytes */
-		DW_BLOCK(BAR_2, 0x00800000, 0x00e00000)
-		/* Channel 1 - BAR 2, offset 22 Mbytes, size 14 Mbytes */
-		DW_BLOCK(BAR_2, 0x01600000, 0x00e00000)
+		/* Channel 0 - BAR 2, offset 8 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00800000, 0x00000800)
+		/* Channel 1 - BAR 2, offset 9 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00900000, 0x00000800)
 	},
 	.dt_rd = {
-		/* Channel 0 - BAR 2, offset 36 Mbytes, size 14 Mbytes */
-		DW_BLOCK(BAR_2, 0x02400000, 0x00e00000)
-		/* Channel 1 - BAR 2, offset 50 Mbytes, size 14 Mbytes */
-		DW_BLOCK(BAR_2, 0x03200000, 0x00e00000)
+		/* Channel 0 - BAR 2, offset 10 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00a00000, 0x00000800)
+		/* Channel 1 - BAR 2, offset 11 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00b00000, 0x00000800)
 	},
 	/* Other */
 	.mf				= EDMA_MF_EDMA_UNROLL,
-- 
2.7.4