From: Niklas Cassel <niklas.cassel@xxxxxxx> The rk3588 has 5 PCIe controllers, however, according the the rk3588 TRM (Technical Reference Manual), only pcie3x4 supports the embedded DMA controller (eDMA) on the DWC PCIe controller. The size of the eDMA region equals to: 0x200 + MAX(NUM_DMA_RD_CHAN, NUM_DMA_WR_CHAN) * 0x200. Where for each 0x200 region, the registers controlling the write channel starts at offset 0x0, and the registers controlling the read channel starts at offset 0x100. pcie3x4 has two DMA read channels and two DMA write channels, so it has size: 0x200 + max(2, 2) * 0x200 = 0x600 On the rk3588 based rock-5b board, when building with CONFIG_DW_EDMA=y: Before this patch, only the iATUs are detected: rockchip-dw-pcie a40000000.pcie: iATU: unroll T, 16 ob, 16 ib, align 64K, limit 8G After this patch, both the iATUs and the eDMA channels are detected: rockchip-dw-pcie a40000000.pcie: iATU: unroll T, 16 ob, 16 ib, align 64K, limit 8G rockchip-dw-pcie a40000000.pcie: eDMA: unroll T, 2 wr, 2 rd Signed-off-by: Niklas Cassel <niklas.cassel@xxxxxxx> --- Note: this patch depends on: https://lore.kernel.org/linux-devicetree/20231020125221.3564951-1-nks@xxxxxxxxxxx/ arch/arm64/boot/dts/rockchip/rk3588.dtsi | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/arch/arm64/boot/dts/rockchip/rk3588.dtsi b/arch/arm64/boot/dts/rockchip/rk3588.dtsi index d7998a9c0c43..e072f5fe655d 100644 --- a/arch/arm64/boot/dts/rockchip/rk3588.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3588.dtsi @@ -101,8 +101,13 @@ pcie3x4: pcie@fe150000 { <GIC_SPI 262 IRQ_TYPE_LEVEL_HIGH 0>, <GIC_SPI 261 IRQ_TYPE_LEVEL_HIGH 0>, <GIC_SPI 260 IRQ_TYPE_LEVEL_HIGH 0>, - <GIC_SPI 259 IRQ_TYPE_LEVEL_HIGH 0>; - interrupt-names = "sys", "pmc", "msg", "legacy", "err"; + <GIC_SPI 259 IRQ_TYPE_LEVEL_HIGH 0>, + <GIC_SPI 271 IRQ_TYPE_LEVEL_HIGH 0>, + <GIC_SPI 272 IRQ_TYPE_LEVEL_HIGH 0>, + <GIC_SPI 269 IRQ_TYPE_LEVEL_HIGH 0>, + <GIC_SPI 270 IRQ_TYPE_LEVEL_HIGH 0>; + interrupt-names = "sys", "pmc", "msg", "legacy", "err", + "dma0", "dma1", "dma2", "dma3"; #interrupt-cells = <1>; interrupt-map-mask = <0 0 0 7>; interrupt-map = <0 0 0 1 &pcie3x4_intc 0>, @@ -122,8 +127,9 @@ pcie3x4: pcie@fe150000 { reg = <0xa 0x40000000 0x0 0x00300000>, <0x0 0xfe150000 0x0 0x00010000>, <0x0 0xf0000000 0x0 0x00100000>, - <0xa 0x40300000 0x0 0x00002000>; - reg-names = "dbi", "apb", "config", "atu"; + <0xa 0x40300000 0x0 0x00002000>, + <0xa 0x40380000 0x0 0x00000600>; + reg-names = "dbi", "apb", "config", "atu", "dma"; resets = <&cru SRST_PCIE0_POWER_UP>, <&cru SRST_P_PCIE0>; reset-names = "pwr", "pipe"; status = "disabled"; -- 2.41.0
