diff options
| -rw-r--r-- | drivers/pci/controller/pcie-rockchip-ep.c | 18 | ||||
| -rw-r--r-- | drivers/pci/controller/pcie-rockchip.h | 4 |
2 files changed, 17 insertions, 5 deletions
diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c index 8f2886ed89d1..8fc8848311ab 100644 --- a/drivers/pci/controller/pcie-rockchip-ep.c +++ b/drivers/pci/controller/pcie-rockchip-ep.c @@ -66,18 +66,26 @@ static void rockchip_pcie_clear_ep_ob_atu(struct rockchip_pcie *rockchip, ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR1(region)); } +static int rockchip_pcie_ep_ob_atu_num_bits(struct rockchip_pcie *rockchip, + u64 pci_addr, size_t size) +{ + int num_pass_bits = fls64(pci_addr ^ (pci_addr + size - 1)); + + return clamp(num_pass_bits, + ROCKCHIP_PCIE_AT_MIN_NUM_BITS, + ROCKCHIP_PCIE_AT_MAX_NUM_BITS); +} + static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn, u32 r, u32 type, u64 cpu_addr, u64 pci_addr, size_t size) { - u64 sz = 1ULL << fls64(size - 1); - int num_pass_bits = ilog2(sz); + int num_pass_bits; u32 addr0, addr1, desc0, desc1; bool is_nor_msg = (type == AXI_WRAPPER_NOR_MSG); - /* The minimal region size is 1MB */ - if (num_pass_bits < 8) - num_pass_bits = 8; + num_pass_bits = rockchip_pcie_ep_ob_atu_num_bits(rockchip, + pci_addr, size); cpu_addr -= rockchip->mem_res->start; addr0 = ((is_nor_msg ? 0x10 : (num_pass_bits - 1)) & diff --git a/drivers/pci/controller/pcie-rockchip.h b/drivers/pci/controller/pcie-rockchip.h index 1c45b3c32151..de24b0488e0b 100644 --- a/drivers/pci/controller/pcie-rockchip.h +++ b/drivers/pci/controller/pcie-rockchip.h @@ -241,6 +241,10 @@ #define ROCKCHIP_PCIE_EP_MSI_CTRL_MASK_MSI_CAP BIT(24) #define ROCKCHIP_PCIE_EP_DUMMY_IRQ_ADDR 0x1 #define ROCKCHIP_PCIE_EP_FUNC_BASE(fn) (((fn) << 12) & GENMASK(19, 12)) + +#define ROCKCHIP_PCIE_AT_MIN_NUM_BITS 8 +#define ROCKCHIP_PCIE_AT_MAX_NUM_BITS 20 + #define ROCKCHIP_PCIE_AT_IB_EP_FUNC_BAR_ADDR0(fn, bar) \ (PCIE_RC_RP_ATS_BASE + 0x0840 + (fn) * 0x0040 + (bar) * 0x0008) #define ROCKCHIP_PCIE_AT_IB_EP_FUNC_BAR_ADDR1(fn, bar) \ |