diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0804-pcie-brcmstb-Bounce-buffer-support-is-for-BCM2711B0.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0804-pcie-brcmstb-Bounce-buffer-support-is-for-BCM2711B0.patch | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0804-pcie-brcmstb-Bounce-buffer-support-is-for-BCM2711B0.patch b/target/linux/brcm2708/patches-4.19/950-0804-pcie-brcmstb-Bounce-buffer-support-is-for-BCM2711B0.patch new file mode 100644 index 0000000000..05172ebcec --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0804-pcie-brcmstb-Bounce-buffer-support-is-for-BCM2711B0.patch @@ -0,0 +1,88 @@ +From 4b777f389e22abb364e398f45673e54bcda9cc55 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Fri, 12 Jul 2019 11:41:25 +0100 +Subject: [PATCH] pcie-brcmstb: Bounce buffer support is for BCM2711B0 + +Add a new compatible string to identify BCM2711B0, as later revisions +don't require the bounce buffer support. + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + drivers/pci/controller/pcie-brcmstb.c | 31 +++++++++++++++++++++++---- + 1 file changed, 27 insertions(+), 4 deletions(-) + +--- a/drivers/pci/controller/pcie-brcmstb.c ++++ b/drivers/pci/controller/pcie-brcmstb.c +@@ -206,6 +206,8 @@ enum pcie_type { + BCM7435, + GENERIC, + BCM7278, ++ BCM2711B0, ++ BCM2711, + }; + + struct brcm_window { +@@ -302,6 +304,20 @@ static const int pcie_offsets[] = { + [EXT_CFG_DATA] = 0x8000, + }; + ++static const struct pcie_cfg_data bcm2711b0_cfg = { ++ .reg_field_info = pcie_reg_field_info, ++ .offsets = pcie_offsets, ++ .max_burst_size = BURST_SIZE_128, ++ .type = BCM2711B0, ++}; ++ ++static const struct pcie_cfg_data bcm2711_cfg = { ++ .reg_field_info = pcie_reg_field_info, ++ .offsets = pcie_offsets, ++ .max_burst_size = BURST_SIZE_128, ++ .type = BCM2711, ++}; ++ + static const struct pcie_cfg_data bcm7435_cfg = { + .reg_field_info = pcie_reg_field_info, + .offsets = pcie_offsets, +@@ -312,7 +328,7 @@ static const struct pcie_cfg_data bcm743 + static const struct pcie_cfg_data generic_cfg = { + .reg_field_info = pcie_reg_field_info, + .offsets = pcie_offsets, +- .max_burst_size = BURST_SIZE_128, // before BURST_SIZE_512 ++ .max_burst_size = BURST_SIZE_512, + .type = GENERIC, + }; + +@@ -380,7 +396,7 @@ static unsigned int bounce_buffer = 32*1 + module_param(bounce_buffer, uint, 0644); + MODULE_PARM_DESC(bounce_buffer, "Size of bounce buffer"); + +-static unsigned int bounce_threshold = 0xc0000000; ++static unsigned int bounce_threshold; + module_param(bounce_threshold, uint, 0644); + MODULE_PARM_DESC(bounce_threshold, "Bounce threshold"); + +@@ -1681,6 +1697,8 @@ static int brcm_pcie_remove(struct platf + } + + static const struct of_device_id brcm_pcie_match[] = { ++ { .compatible = "brcm,bcm2711b0-pcie", .data = &bcm2711b0_cfg }, ++ { .compatible = "brcm,bcm2711-pcie", .data = &bcm2711_cfg }, + { .compatible = "brcm,bcm7425-pcie", .data = &bcm7425_cfg }, + { .compatible = "brcm,bcm7435-pcie", .data = &bcm7435_cfg }, + { .compatible = "brcm,bcm7278-pcie", .data = &bcm7278_cfg }, +@@ -1736,8 +1754,13 @@ static int brcm_pcie_probe(struct platfo + if (IS_ERR(base)) + return PTR_ERR(base); + +- /* To Do: Add hardware check if this ever gets fixed */ +- if (max_pfn > (bounce_threshold/PAGE_SIZE)) { ++ if (!bounce_threshold) { ++ /* PCIe on BCM2711B0 can only address 3GB */ ++ if (pcie->type == BCM2711B0 || pcie->type == GENERIC) ++ bounce_threshold = 0xc0000000; ++ } ++ ++ if (bounce_threshold && (max_pfn > (bounce_threshold/PAGE_SIZE))) { + int ret; + ret = brcm_pcie_bounce_init(&pdev->dev, bounce_buffer, + (dma_addr_t)bounce_threshold); |