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| author |   Bjorn Helgaas <bhelgaas@google.com> | 2019-03-06 15:30:23 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2019-03-06 15:30:23 -0600 |
| commit | d00aaa88c33a9df2ce72a1cffd940c2338801046 (patch) | |
| tree | 7e06f20cf99b48f41c0d3666e10f187014e287f9 /drivers/pci | |
| parent | Merge branch 'remotes/lorenzo/pci/hv' (diff) | |
| parent | PCI: mediatek: Enlarge PCIe2AHB window size to support 4GB DRAM (diff) | |
| download | linux-dev-d00aaa88c33a9df2ce72a1cffd940c2338801046.tar.xz linux-dev-d00aaa88c33a9df2ce72a1cffd940c2338801046.zip | |
Merge branch 'remotes/lorenzo/pci/mediatek'
- Fix mediatek MMIO size computation to enable full size of available
MMIO space (Honghui Zhang)
- Fix mediatek DMA window size computation to allow endpoint DMA access
to full DRAM address range (Honghui Zhang)
* remotes/lorenzo/pci/mediatek:
PCI: mediatek: Enlarge PCIe2AHB window size to support 4GB DRAM
PCI: mediatek: Fix memory mapped IO range size computation
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/controller/pcie-mediatek.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c index 55e471c18e8d..0b6c72804e03 100644 --- a/drivers/pci/controller/pcie-mediatek.c +++ b/drivers/pci/controller/pcie-mediatek.c @@ -90,6 +90,12 @@ #define AHB2PCIE_SIZE(x) ((x) & GENMASK(4, 0)) #define PCIE_AXI_WINDOW0 0x448 #define WIN_ENABLE BIT(7) +/* + * Define PCIe to AHB window size as 2^33 to support max 8GB address space + * translate, support least 4GB DRAM size access from EP DMA(physical DRAM + * start from 0x40000000). + */ +#define PCIE2AHB_SIZE 0x21 /* PCIe V2 configuration transaction header */ #define PCIE_CFG_HEADER0 0x460 @@ -654,7 +660,6 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port) struct resource *mem = &pcie->mem; const struct mtk_pcie_soc *soc = port->pcie->soc; u32 val; - size_t size; int err; /* MT7622 platforms need to enable LTSSM and ASPM from PCIe subsys */ @@ -706,15 +711,15 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port) mtk_pcie_enable_msi(port); /* Set AHB to PCIe translation windows */ - size = mem->end - mem->start; - val = lower_32_bits(mem->start) | AHB2PCIE_SIZE(fls(size)); + val = lower_32_bits(mem->start) | + AHB2PCIE_SIZE(fls(resource_size(mem))); writel(val, port->base + PCIE_AHB_TRANS_BASE0_L); val = upper_32_bits(mem->start); writel(val, port->base + PCIE_AHB_TRANS_BASE0_H); /* Set PCIe to AXI translation memory space.*/ - val = fls(0xffffffff) | WIN_ENABLE; + val = PCIE2AHB_SIZE | WIN_ENABLE; writel(val, port->base + PCIE_AXI_WINDOW0); return 0; |