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dmaengine: ioat: use PCI core macros for PCIe Capability

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The PCIe Capability is defined by the PCIe spec, so use the PCI_EXP_DEVCTL
macros defined by the PCI core instead of defining copies in IOAT.  This
makes it easier to find all uses of the PCIe Device Control register.  No
functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20230307214615.887354-1-helgaas@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Bjorn Helgaas 2023-03-07 15:46:15 -06:00 committed by Vinod Koul
parent 3765af04f4
commit 8f6707d077
2 changed files with 3 additions and 10 deletions
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6
drivers/dma/ioat/init.c
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@ -1191,13 +1191,13 @@ static int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca)
ioat_dma->dca = ioat_dca_init(pdev, ioat_dma->reg_base);
/* disable relaxed ordering */
err = pcie_capability_read_word(pdev, IOAT_DEVCTRL_OFFSET, &val16);
err = pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &val16);
if (err)
return pcibios_err_to_errno(err);
/* clear relaxed ordering enable */
val16 &= ~IOAT_DEVCTRL_ROE;
err = pcie_capability_write_word(pdev, IOAT_DEVCTRL_OFFSET, val16);
val16 &= ~PCI_EXP_DEVCTL_RELAX_EN;
err = pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, val16);
if (err)
return pcibios_err_to_errno(err);

7
drivers/dma/ioat/registers.h
View File

@ -14,13 +14,6 @@
#define IOAT_PCI_CHANERR_INT_OFFSET 0x180
#define IOAT_PCI_CHANERRMASK_INT_OFFSET 0x184
/* PCIe config registers */
/* EXPCAPID + N */
#define IOAT_DEVCTRL_OFFSET 0x8
/* relaxed ordering enable */
#define IOAT_DEVCTRL_ROE 0x10
/* MMIO Device Registers */
#define IOAT_CHANCNT_OFFSET 0x00 /* 8-bit */