diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.10/0046-bus-mvebu-mbus-Add-new-API-for-the-PCIe-memory-and-I.patch')
| -rw-r--r-- | target/linux/mvebu/patches-3.10/0046-bus-mvebu-mbus-Add-new-API-for-the-PCIe-memory-and-I.patch | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-3.10/0046-bus-mvebu-mbus-Add-new-API-for-the-PCIe-memory-and-I.patch b/target/linux/mvebu/patches-3.10/0046-bus-mvebu-mbus-Add-new-API-for-the-PCIe-memory-and-I.patch new file mode 100644 index 0000000..973ffde --- /dev/null +++ b/target/linux/mvebu/patches-3.10/0046-bus-mvebu-mbus-Add-new-API-for-the-PCIe-memory-and-I.patch @@ -0,0 +1,121 @@ +From c9646c891dbd07061a9ff5e061f9f9e54c571349 Mon Sep 17 00:00:00 2001 +From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> +Date: Tue, 9 Jul 2013 10:41:53 -0300 +Subject: [PATCH 046/203] bus: mvebu-mbus: Add new API for the PCIe memory and + IO aperture + +We add two optional properties to the MBus DT binding, to encode +the PCIe memory and IO aperture. This allows such information to +be retrieved by -for instance- the pci driver to allocate the +MBus decoding windows. + +Correspondingly, and in order to retrieve this information, +we add two new APIs. + +Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> +Tested-by: Andrew Lunn <andrew@lunn.ch> +Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> +--- + drivers/bus/mvebu-mbus.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++ + include/linux/mbus.h | 4 ++++ + 2 files changed, 53 insertions(+) + +--- a/drivers/bus/mvebu-mbus.c ++++ b/drivers/bus/mvebu-mbus.c +@@ -142,6 +142,8 @@ struct mvebu_mbus_state { + struct dentry *debugfs_root; + struct dentry *debugfs_sdram; + struct dentry *debugfs_devs; ++ struct resource pcie_mem_aperture; ++ struct resource pcie_io_aperture; + const struct mvebu_mbus_soc_data *soc; + int hw_io_coherency; + }; +@@ -821,6 +823,20 @@ int mvebu_mbus_del_window(phys_addr_t ba + return 0; + } + ++void mvebu_mbus_get_pcie_mem_aperture(struct resource *res) ++{ ++ if (!res) ++ return; ++ *res = mbus_state.pcie_mem_aperture; ++} ++ ++void mvebu_mbus_get_pcie_io_aperture(struct resource *res) ++{ ++ if (!res) ++ return; ++ *res = mbus_state.pcie_io_aperture; ++} ++ + static __init int mvebu_mbus_debugfs_init(void) + { + struct mvebu_mbus_state *s = &mbus_state; +@@ -1023,6 +1039,35 @@ static int __init mbus_dt_setup(struct m + return 0; + } + ++static void __init mvebu_mbus_get_pcie_resources(struct device_node *np, ++ struct resource *mem, ++ struct resource *io) ++{ ++ u32 reg[2]; ++ int ret; ++ ++ /* ++ * These are optional, so we clear them and they'll ++ * be zero if they are missing from the DT. ++ */ ++ memset(mem, 0, sizeof(struct resource)); ++ memset(io, 0, sizeof(struct resource)); ++ ++ ret = of_property_read_u32_array(np, "pcie-mem-aperture", reg, ARRAY_SIZE(reg)); ++ if (!ret) { ++ mem->start = reg[0]; ++ mem->end = mem->start + reg[1]; ++ mem->flags = IORESOURCE_MEM; ++ } ++ ++ ret = of_property_read_u32_array(np, "pcie-io-aperture", reg, ARRAY_SIZE(reg)); ++ if (!ret) { ++ io->start = reg[0]; ++ io->end = io->start + reg[1]; ++ io->flags = IORESOURCE_IO; ++ } ++} ++ + int __init mvebu_mbus_dt_init(void) + { + struct resource mbuswins_res, sdramwins_res; +@@ -1062,6 +1107,10 @@ int __init mvebu_mbus_dt_init(void) + return -EINVAL; + } + ++ /* Get optional pcie-{mem,io}-aperture properties */ ++ mvebu_mbus_get_pcie_resources(np, &mbus_state.pcie_mem_aperture, ++ &mbus_state.pcie_io_aperture); ++ + ret = mvebu_mbus_common_init(&mbus_state, + mbuswins_res.start, + resource_size(&mbuswins_res), +--- a/include/linux/mbus.h ++++ b/include/linux/mbus.h +@@ -11,6 +11,8 @@ + #ifndef __LINUX_MBUS_H + #define __LINUX_MBUS_H + ++struct resource; ++ + struct mbus_dram_target_info + { + /* +@@ -59,6 +61,8 @@ static inline const struct mbus_dram_tar + } + #endif + ++void mvebu_mbus_get_pcie_mem_aperture(struct resource *res); ++void mvebu_mbus_get_pcie_io_aperture(struct resource *res); + int mvebu_mbus_add_window_remap_flags(const char *devname, phys_addr_t base, + size_t size, phys_addr_t remap, + unsigned int flags); |