diff options
Diffstat (limited to 'target/linux/ramips/patches-5.15/103-v5.17-PCI-mt7621-Move-MIPS-setup-to-pcibios_root_bridge_pr.patch')
| -rw-r--r-- | target/linux/ramips/patches-5.15/103-v5.17-PCI-mt7621-Move-MIPS-setup-to-pcibios_root_bridge_pr.patch | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-5.15/103-v5.17-PCI-mt7621-Move-MIPS-setup-to-pcibios_root_bridge_pr.patch b/target/linux/ramips/patches-5.15/103-v5.17-PCI-mt7621-Move-MIPS-setup-to-pcibios_root_bridge_pr.patch new file mode 100644 index 0000000000..4b46b3e3f6 --- /dev/null +++ b/target/linux/ramips/patches-5.15/103-v5.17-PCI-mt7621-Move-MIPS-setup-to-pcibios_root_bridge_pr.patch @@ -0,0 +1,119 @@ +From: Sergio Paracuellos <sergio.paracuellos@gmail.com> +Date: Tue, 7 Dec 2021 11:49:21 +0100 +Subject: [PATCH] PCI: mt7621: Move MIPS setup to pcibios_root_bridge_prepare() + +On the MIPS ralink mt7621 platform, we need to set up I/O coherency units +based on the host bridge apertures. + +To remove this arch dependency from the driver itself, move the coherency +setup from the driver to pcibios_root_bridge_prepare(). + +[bhelgaas: squash add/remove into one patch, commit log] +Link: https://lore.kernel.org/r/20211207104924.21327-3-sergio.paracuellos@gmail.com +Link: https://lore.kernel.org/r/20211207104924.21327-4-sergio.paracuellos@gmail.com +Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> +Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> +Reviewed-by: Guenter Roeck <linux@roeck-us.net> # arch/mips +Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> # arch/mips +--- + +--- a/arch/mips/ralink/mt7621.c ++++ b/arch/mips/ralink/mt7621.c +@@ -10,6 +10,8 @@ + #include <linux/slab.h> + #include <linux/sys_soc.h> + #include <linux/memblock.h> ++#include <linux/pci.h> ++#include <linux/bug.h> + + #include <asm/bootinfo.h> + #include <asm/mipsregs.h> +@@ -25,6 +27,35 @@ + static u32 detect_magic __initdata; + static struct ralink_soc_info *soc_info_ptr; + ++int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) ++{ ++ struct resource_entry *entry; ++ resource_size_t mask; ++ ++ entry = resource_list_first_type(&bridge->windows, IORESOURCE_MEM); ++ if (!entry) { ++ pr_err("Cannot get memory resource\n"); ++ return -EINVAL; ++ } ++ ++ if (mips_cps_numiocu(0)) { ++ /* ++ * Hardware doesn't accept mask values with 1s after ++ * 0s (e.g. 0xffef), so warn if that's happen ++ */ ++ mask = ~(entry->res->end - entry->res->start) & CM_GCR_REGn_MASK_ADDRMASK; ++ WARN_ON(mask && BIT(ffz(~mask)) - 1 != ~mask); ++ ++ write_gcr_reg1_base(entry->res->start); ++ write_gcr_reg1_mask(mask | CM_GCR_REGn_MASK_CMTGT_IOCU0); ++ pr_info("PCI coherence region base: 0x%08llx, mask/settings: 0x%08llx\n", ++ (unsigned long long)read_gcr_reg1_base(), ++ (unsigned long long)read_gcr_reg1_mask()); ++ } ++ ++ return 0; ++} ++ + phys_addr_t mips_cpc_default_phys_base(void) + { + panic("Cannot detect cpc address"); +--- a/drivers/pci/controller/pcie-mt7621.c ++++ b/drivers/pci/controller/pcie-mt7621.c +@@ -208,37 +208,6 @@ static inline void mt7621_control_deasse + reset_control_assert(port->pcie_rst); + } + +-static int setup_cm_memory_region(struct pci_host_bridge *host) +-{ +- struct mt7621_pcie *pcie = pci_host_bridge_priv(host); +- struct device *dev = pcie->dev; +- struct resource_entry *entry; +- resource_size_t mask; +- +- entry = resource_list_first_type(&host->windows, IORESOURCE_MEM); +- if (!entry) { +- dev_err(dev, "cannot get memory resource\n"); +- return -EINVAL; +- } +- +- if (mips_cps_numiocu(0)) { +- /* +- * FIXME: hardware doesn't accept mask values with 1s after +- * 0s (e.g. 0xffef), so it would be great to warn if that's +- * about to happen +- */ +- mask = ~(entry->res->end - entry->res->start); +- +- write_gcr_reg1_base(entry->res->start); +- write_gcr_reg1_mask(mask | CM_GCR_REGn_MASK_CMTGT_IOCU0); +- dev_info(dev, "PCI coherence region base: 0x%08llx, mask/settings: 0x%08llx\n", +- (unsigned long long)read_gcr_reg1_base(), +- (unsigned long long)read_gcr_reg1_mask()); +- } +- +- return 0; +-} +- + static int mt7621_pcie_parse_port(struct mt7621_pcie *pcie, + struct device_node *node, + int slot) +@@ -557,12 +526,6 @@ static int mt7621_pcie_probe(struct plat + goto remove_resets; + } + +- err = setup_cm_memory_region(bridge); +- if (err) { +- dev_err(dev, "error setting up iocu mem regions\n"); +- goto remove_resets; +- } +- + return mt7621_pcie_register_host(bridge); + + remove_resets: |