diff options
Diffstat (limited to 'target/linux/mvebu/patches-4.4')
| -rw-r--r-- | target/linux/mvebu/patches-4.4/024-mvebu-make-device-IO-strongly-ordered.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-4.4/024-mvebu-make-device-IO-strongly-ordered.patch b/target/linux/mvebu/patches-4.4/024-mvebu-make-device-IO-strongly-ordered.patch new file mode 100644 index 0000000000..dc669978ff --- /dev/null +++ b/target/linux/mvebu/patches-4.4/024-mvebu-make-device-IO-strongly-ordered.patch @@ -0,0 +1,47 @@ +On Cortex-A9 based Marvell SoCs, when HW I/O coherency is enabled, all +non-RAM space needs to be mapped strongly ordered. +In upstream this was added for PCIe I/O only, this change expands it +to cover all device memory. Fixes issues with CESA. +Based on patch from Thomas Petazzoni. + +Signed-off-by: Felix Fietkau <nbd@nbd.name> + +--- a/arch/arm/mach-mvebu/coherency.c ++++ b/arch/arm/mach-mvebu/coherency.c +@@ -162,22 +162,16 @@ exit: + } + + /* +- * This ioremap hook is used on Armada 375/38x to ensure that PCIe ++ * This ioremap hook is used on Armada 375/38x to ensure that all non-RAM + * memory areas are mapped as MT_UNCACHED instead of MT_DEVICE. This +- * is needed as a workaround for a deadlock issue between the PCIe ++ * is needed as a workaround for a deadlock issue between the bus + * interface and the cache controller. + */ + static void __iomem * +-armada_pcie_wa_ioremap_caller(phys_addr_t phys_addr, size_t size, +- unsigned int mtype, void *caller) ++armada_wa_ioremap_caller(phys_addr_t phys_addr, size_t size, ++ unsigned int mtype, void *caller) + { +- struct resource pcie_mem; +- +- mvebu_mbus_get_pcie_mem_aperture(&pcie_mem); +- +- if (pcie_mem.start <= phys_addr && (phys_addr + size) <= pcie_mem.end) +- mtype = MT_UNCACHED; +- ++ mtype = MT_UNCACHED; + return __arm_ioremap_caller(phys_addr, size, mtype, caller); + } + +@@ -186,7 +180,7 @@ static void __init armada_375_380_cohere + struct device_node *cache_dn; + + coherency_cpu_base = of_iomap(np, 0); +- arch_ioremap_caller = armada_pcie_wa_ioremap_caller; ++ arch_ioremap_caller = armada_wa_ioremap_caller; + + /* + * We should switch the PL310 to I/O coherency mode only if |