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dmaengine: dw-edma-pcie: Factor out descriptor block address lookup

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Add an optional physical address override to struct dw_edma_block and
use a helper to compute descriptor block addresses.

No functional change intended. Existing Synopsys EDDA and AMD (Xilinx)
MDB/CPM6 block descriptors leave the override unset, so the helper still
returns the same values as before.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Koichiro Den <den@valinux.co.jp>
Link: https://patch.msgid.link/20260721062815.4117887-12-den@valinux.co.jp
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Koichiro Den
2026-07-21 15:28:12 +09:00
committed by Vinod Koul
parent 9504c24325
commit 6f3328acab
1 changed files with 22 additions and 12 deletions
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34
drivers/dma/dw-edma/dw-edma-pcie.c
View File

@@ -55,6 +55,8 @@
struct dw_edma_block {
enum pci_barno bar;
off_t off;
u64 paddr;
bool paddr_valid;
size_t sz;
};
@@ -375,6 +377,18 @@ static u64 dw_edma_get_phys_addr(struct pci_dev *pdev,
return pci_bus_address(pdev, bar);
}
static u64 dw_edma_get_block_addr(struct pci_dev *pdev,
const struct dw_edma_pcie_match_data *match,
struct dw_edma_pcie_data *pdata,
const struct dw_edma_block *block)
{
if (block->paddr_valid)
return block->paddr;
return dw_edma_get_phys_addr(pdev, match, pdata, block->bar) +
block->off;
}
static int dw_edma_pcie_probe(struct pci_dev *pdev,
const struct pci_device_id *pid)
{
@@ -479,9 +493,8 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
return -ENOMEM;
ll_region->vaddr.io += ll_block->off;
ll_region->paddr = dw_edma_get_phys_addr(pdev, match,
dma_data, ll_block->bar);
ll_region->paddr += ll_block->off;
ll_region->paddr = dw_edma_get_block_addr(pdev, match, dma_data,
ll_block);
ll_region->sz = ll_block->sz;
dt_region->vaddr.io = pcim_iomap_table(pdev)[dt_block->bar];
@@ -489,9 +502,8 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
return -ENOMEM;
dt_region->vaddr.io += dt_block->off;
dt_region->paddr = dw_edma_get_phys_addr(pdev, match,
dma_data, dt_block->bar);
dt_region->paddr += dt_block->off;
dt_region->paddr = dw_edma_get_block_addr(pdev, match, dma_data,
dt_block);
dt_region->sz = dt_block->sz;
}
@@ -506,9 +518,8 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
return -ENOMEM;
ll_region->vaddr.io += ll_block->off;
ll_region->paddr = dw_edma_get_phys_addr(pdev, match,
dma_data, ll_block->bar);
ll_region->paddr += ll_block->off;
ll_region->paddr = dw_edma_get_block_addr(pdev, match, dma_data,
ll_block);
ll_region->sz = ll_block->sz;
dt_region->vaddr.io = pcim_iomap_table(pdev)[dt_block->bar];
@@ -516,9 +527,8 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
return -ENOMEM;
dt_region->vaddr.io += dt_block->off;
dt_region->paddr = dw_edma_get_phys_addr(pdev, match,
dma_data, dt_block->bar);
dt_region->paddr += dt_block->off;
dt_region->paddr = dw_edma_get_block_addr(pdev, match, dma_data,
dt_block);
dt_region->sz = dt_block->sz;
}