This commit adds two functions armada_370_xp_alloc_pcie_window() and
armada_370_xp_free_pcie_window() that respectively allocate and free
an address decoding window pointing to either a memory or I/O region
of a PCIe device.
Those functions will be used by the PCIe driver to create and remove
those regions depending on the PCIe devices that are detected.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-mvebu/addr-map.c | 87 +++++++++++++++++++++++++--
arch/arm/mach-mvebu/common.h | 1 +
arch/arm/mach-mvebu/include/mach/addr-map.h | 8 +++
3 files changed, 92 insertions(+), 4 deletions(-)
create mode 100644 arch/arm/mach-mvebu/include/mach/addr-map.h
diff --git a/arch/arm/mach-mvebu/addr-map.c b/arch/arm/mach-mvebu/addr-map.c
index ab9b3bd..7ec8fc6 100644
--- a/arch/arm/mach-mvebu/addr-map.c
+++ b/arch/arm/mach-mvebu/addr-map.c
@@ -24,14 +24,10 @@
#define ARMADA_XP_TARGET_DEV_BUS 1
#define ARMADA_XP_ATTR_DEV_BOOTROM 0x1D
#define ARMADA_XP_TARGET_ETH1 3
-#define ARMADA_XP_TARGET_PCIE_0_2 4
#define ARMADA_XP_TARGET_ETH0 7
-#define ARMADA_XP_TARGET_PCIE_1_3 8
#define ARMADA_370_TARGET_DEV_BUS 1
#define ARMADA_370_ATTR_DEV_BOOTROM 0x1D
-#define ARMADA_370_TARGET_PCIE_0 4
-#define ARMADA_370_TARGET_PCIE_1 8
#define ARMADA_WINDOW_8_PLUS_OFFSET 0x90
#define ARMADA_SDRAM_ADDR_DECODING_OFFSET 0x180
@@ -89,6 +85,89 @@ static struct __initdata orion_addr_map_cfg addr_map_cfg = {
.win_cfg_base = armada_cfg_base,
};
+#ifdef CONFIG_PCI
+/*
+ * This structure and the following arrays allow to map a PCIe (port,
+ * lane) tuple to the corresponding (target, attribute) tuple needed
+ * to configure an address decoding window for the given PCIe (port,
+ * lane).
+ */
+struct pcie_mapping {
+ int port;
+ int lane;
+ u8 target;
+ u8 attr;
+};
+
+struct pcie_mapping armada_xp_pcie_mappings[] = {
+ { .port = 0, .lane = 0, .target = 4, .attr = 0xE0 },
+ { .port = 0, .lane = 1, .target = 4, .attr = 0xD0 },
+ { .port = 0, .lane = 2, .target = 4, .attr = 0xB0 },
+ { .port = 0, .lane = 3, .target = 4, .attr = 0x70 },
+ { .port = 1, .lane = 0, .target = 8, .attr = 0xE0 },
+ { .port = 1, .lane = 1, .target = 8, .attr = 0xD0 },
+ { .port = 1, .lane = 2, .target = 8, .attr = 0xB0 },
+ { .port = 1, .lane = 3, .target = 8, .attr = 0x70 },
+ { .port = 2, .lane = 0, .target = 4, .attr = 0xF0 },
+ { .port = 3, .lane = 0, .target = 8, .attr = 0xF0 },
+ { .port = -1 },
+};
+
+struct pcie_mapping armada_370_pcie_mappings[] = {
+ { .port = 0, .lane = 0, .target = 4, .attr = 0xE0 },
+ { .port = 1, .lane = 0, .target = 8, .attr = 0xE0 },
+ { .port = -1 },
+};
+
+/*
+ * This function sets up a new address decoding window at the given
+ * base address, pointing to the given PCIe interface (through
+ * pcie_port and pcie_lane).
+ */
+int __init armada_370_xp_alloc_pcie_window(int pcie_port, int pcie_lane,
+ unsigned long base, u32 size,
+ int type)
+{
+ struct pcie_mapping *mapping, *mappings;
+ u8 target, attr;
+
+ if (of_machine_is_compatible("marvell,armadaxp"))
+ mappings = armada_xp_pcie_mappings;
+ else if (of_machine_is_compatible("marvell,armada370"))
+ mappings = armada_370_pcie_mappings;
+ else
+ return -ENODEV;
+
+ for (mapping = mappings; mapping->port != -1; mapping++)
+ if (mapping->port == pcie_port && mapping->lane == pcie_lane)
+ break;
+
+ if (mapping->port == -1)
+ return -ENODEV;
+
+ target = mapping->target;
+ attr = mapping->attr;
+
+ /*
+ * Bit 3 of the attributes indicates that it is a
+ * memory region, as opposed to an I/O region
+ */
+ if (type == IORESOURCE_MEM)
+ attr |= (1 << 3);
+
+ return orion_alloc_cpu_win(&addr_map_cfg, base, size, target, attr, -1);
+}
+
+/*
+ * Frees an address decoding window previously set up by
+ * armada_370_xp_setup_pcie_window().
+ */
+int __init armada_370_xp_free_pcie_window(unsigned long base)
+{
+ return orion_free_cpu_win(&addr_map_cfg, base);
+}
+#endif
+
static int __init armada_setup_cpu_mbus(void)
{
struct device_node *np;
diff --git a/arch/arm/mach-mvebu/common.h b/arch/arm/mach-mvebu/common.h
index aa27bc2..77c078c 100644
--- a/arch/arm/mach-mvebu/common.h
+++ b/arch/arm/mach-mvebu/common.h
@@ -25,4 +25,5 @@ int armada_370_xp_coherency_init(void);
int armada_370_xp_pmsu_init(void);
void armada_xp_secondary_startup(void);
extern struct smp_operations armada_xp_smp_ops;
+
#endif
diff --git a/arch/arm/mach-mvebu/include/mach/addr-map.h b/arch/arm/mach-mvebu/include/mach/addr-map.h
new file mode 100644
index 0000000..0845b27
--- /dev/null
+++ b/arch/arm/mach-mvebu/include/mach/addr-map.h
@@ -0,0 +1,8 @@
+#ifndef MVEBU_ADDR_MAP_H
+#define MVEBU_ADDR_MAP_H
+
+int armada_370_xp_alloc_pcie_window(int pcie_port, int pcie_lane,
+ unsigned long base, u32 size, int type);
+int armada_370_xp_free_pcie_window(unsigned long base);
+
+#endif /* MVEBU_ADDR_MAP_H */
--
1.7.9.5
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