mirror of https://github.com/hak5/openwrt-owl.git
122 lines
3.4 KiB
Diff
122 lines
3.4 KiB
Diff
From c9646c891dbd07061a9ff5e061f9f9e54c571349 Mon Sep 17 00:00:00 2001
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From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
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Date: Tue, 9 Jul 2013 10:41:53 -0300
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Subject: [PATCH 046/203] bus: mvebu-mbus: Add new API for the PCIe memory and
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IO aperture
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We add two optional properties to the MBus DT binding, to encode
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the PCIe memory and IO aperture. This allows such information to
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be retrieved by -for instance- the pci driver to allocate the
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MBus decoding windows.
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Correspondingly, and in order to retrieve this information,
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we add two new APIs.
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Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
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Tested-by: Andrew Lunn <andrew@lunn.ch>
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Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
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---
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drivers/bus/mvebu-mbus.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++
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include/linux/mbus.h | 4 ++++
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2 files changed, 53 insertions(+)
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--- a/drivers/bus/mvebu-mbus.c
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+++ b/drivers/bus/mvebu-mbus.c
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@@ -142,6 +142,8 @@ struct mvebu_mbus_state {
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struct dentry *debugfs_root;
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struct dentry *debugfs_sdram;
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struct dentry *debugfs_devs;
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+ struct resource pcie_mem_aperture;
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+ struct resource pcie_io_aperture;
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const struct mvebu_mbus_soc_data *soc;
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int hw_io_coherency;
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};
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@@ -821,6 +823,20 @@ int mvebu_mbus_del_window(phys_addr_t ba
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return 0;
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}
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+void mvebu_mbus_get_pcie_mem_aperture(struct resource *res)
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+{
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+ if (!res)
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+ return;
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+ *res = mbus_state.pcie_mem_aperture;
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+}
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+
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+void mvebu_mbus_get_pcie_io_aperture(struct resource *res)
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+{
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+ if (!res)
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+ return;
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+ *res = mbus_state.pcie_io_aperture;
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+}
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+
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static __init int mvebu_mbus_debugfs_init(void)
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{
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struct mvebu_mbus_state *s = &mbus_state;
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@@ -1023,6 +1039,35 @@ static int __init mbus_dt_setup(struct m
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return 0;
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}
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+static void __init mvebu_mbus_get_pcie_resources(struct device_node *np,
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+ struct resource *mem,
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+ struct resource *io)
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+{
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+ u32 reg[2];
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+ int ret;
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+
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+ /*
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+ * These are optional, so we clear them and they'll
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+ * be zero if they are missing from the DT.
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+ */
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+ memset(mem, 0, sizeof(struct resource));
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+ memset(io, 0, sizeof(struct resource));
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+
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+ ret = of_property_read_u32_array(np, "pcie-mem-aperture", reg, ARRAY_SIZE(reg));
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+ if (!ret) {
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+ mem->start = reg[0];
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+ mem->end = mem->start + reg[1];
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+ mem->flags = IORESOURCE_MEM;
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+ }
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+
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+ ret = of_property_read_u32_array(np, "pcie-io-aperture", reg, ARRAY_SIZE(reg));
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+ if (!ret) {
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+ io->start = reg[0];
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+ io->end = io->start + reg[1];
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+ io->flags = IORESOURCE_IO;
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+ }
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+}
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+
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int __init mvebu_mbus_dt_init(void)
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{
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struct resource mbuswins_res, sdramwins_res;
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@@ -1062,6 +1107,10 @@ int __init mvebu_mbus_dt_init(void)
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return -EINVAL;
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}
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+ /* Get optional pcie-{mem,io}-aperture properties */
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+ mvebu_mbus_get_pcie_resources(np, &mbus_state.pcie_mem_aperture,
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+ &mbus_state.pcie_io_aperture);
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+
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ret = mvebu_mbus_common_init(&mbus_state,
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mbuswins_res.start,
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resource_size(&mbuswins_res),
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--- a/include/linux/mbus.h
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+++ b/include/linux/mbus.h
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@@ -11,6 +11,8 @@
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#ifndef __LINUX_MBUS_H
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#define __LINUX_MBUS_H
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+struct resource;
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+
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struct mbus_dram_target_info
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{
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/*
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@@ -59,6 +61,8 @@ static inline const struct mbus_dram_tar
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}
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#endif
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+void mvebu_mbus_get_pcie_mem_aperture(struct resource *res);
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+void mvebu_mbus_get_pcie_io_aperture(struct resource *res);
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int mvebu_mbus_add_window_remap_flags(const char *devname, phys_addr_t base,
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size_t size, phys_addr_t remap,
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unsigned int flags);
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