oxnas: add patches and config for Linux 4.4

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

SVN-Revision: 48339

15 files changed, 838 insertions, 0 deletions

diff --git a/target/linux/oxnas/config-4.4 b/target/linux/oxnas/config-4.4
new file mode 100644
index 0000000000..07ce8b2f64
--- /dev/null
+++ b/target/linux/oxnas/config-4.4
@@ -0,0 +1,383 @@
+CONFIG_ALIGNMENT_TRAP=y
+# CONFIG_APM_EMULATION is not set
+CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE=y
+CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
+CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
+CONFIG_ARCH_HAS_RESET_CONTROLLER=y
+CONFIG_ARCH_HAS_SG_CHAIN=y
+CONFIG_ARCH_HAS_TICK_BROADCAST=y
+CONFIG_ARCH_HAVE_CUSTOM_GPIO_H=y
+CONFIG_ARCH_HIBERNATION_POSSIBLE=y
+CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
+CONFIG_ARCH_NR_GPIO=0
+CONFIG_ARCH_OXNAS=y
+CONFIG_ARCH_REQUIRE_GPIOLIB=y
+# CONFIG_ARCH_SELECT_MEMORY_MODEL is not set
+# CONFIG_ARCH_SPARSEMEM_DEFAULT is not set
+CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
+CONFIG_ARCH_SUPPORTS_UPROBES=y
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_ARCH_USE_BUILTIN_BSWAP=y
+CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
+CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
+CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
+CONFIG_ARCH_WANT_LIBATA_LEDS=y
+CONFIG_ARM=y
+CONFIG_ARM_CPUIDLE=y
+# CONFIG_ARM_CPU_SUSPEND is not set
+CONFIG_ARM_DMA_IOMMU_ALIGNMENT=8
+CONFIG_ARM_DMA_USE_IOMMU=y
+CONFIG_ARM_GIC=y
+CONFIG_ARM_HAS_SG_CHAIN=y
+CONFIG_ARM_L1_CACHE_SHIFT=5
+CONFIG_ARM_PATCH_PHYS_VIRT=y
+CONFIG_ARM_SMMU=y
+CONFIG_ARM_THUMB=y
+CONFIG_ARM_UNWIND=y
+CONFIG_ATA_LEDS=y
+CONFIG_AUTO_ZRELADDR=y
+# CONFIG_BLK_DEV_INITRD is not set
+CONFIG_BLK_DEV_SD=y
+CONFIG_BOOTPARAM_HUNG_TASK_PANIC=y
+CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=1
+CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC=y
+CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE=1
+# CONFIG_CACHE_L2X0 is not set
+CONFIG_CLKDEV_LOOKUP=y
+CONFIG_CLKSRC_MMIO=y
+CONFIG_CLKSRC_OF=y
+CONFIG_CLKSRC_PROBE=y
+CONFIG_CLKSRC_RPS_TIMER=y
+CONFIG_CLONE_BACKWARDS=y
+CONFIG_CMDLINE="console=ttyS0,115200n8 earlyprintk=serial"
+CONFIG_COMMON_CLK=y
+CONFIG_COMPACTION=y
+CONFIG_CONSOLE_POLL=y
+CONFIG_COREDUMP=y
+CONFIG_CPU_32v6=y
+CONFIG_CPU_32v6K=y
+CONFIG_CPU_ABRT_EV6=y
+# CONFIG_CPU_BPREDICT_DISABLE is not set
+CONFIG_CPU_CACHE_V6=y
+CONFIG_CPU_CACHE_VIPT=y
+CONFIG_CPU_COPY_V6=y
+CONFIG_CPU_CP15=y
+CONFIG_CPU_CP15_MMU=y
+CONFIG_CPU_HAS_ASID=y
+# CONFIG_CPU_ICACHE_DISABLE is not set
+CONFIG_CPU_IDLE=y
+CONFIG_CPU_IDLE_GOV_LADDER=y
+CONFIG_CPU_IDLE_GOV_MENU=y
+CONFIG_CPU_PABRT_V6=y
+CONFIG_CPU_PM=y
+CONFIG_CPU_RMAP=y
+# CONFIG_CPU_SW_DOMAIN_PAN is not set
+CONFIG_CPU_TLB_V6=y
+CONFIG_CPU_V6K=y
+CONFIG_CRC16=y
+# CONFIG_CRC32_SARWATE is not set
+CONFIG_CRC32_SLICEBY8=y
+CONFIG_CRYPTO_DEFLATE=y
+CONFIG_CRYPTO_LZO=y
+CONFIG_CRYPTO_RNG2=y
+CONFIG_CRYPTO_WORKQUEUE=y
+CONFIG_CRYPTO_XZ=y
+CONFIG_DCACHE_WORD_ACCESS=y
+CONFIG_DEBUG_ICEDCC=y
+CONFIG_DEBUG_LL=y
+CONFIG_DEBUG_LL_INCLUDE="debug/icedcc.S"
+# CONFIG_DEBUG_UART_8250 is not set
+# CONFIG_DEBUG_USER is not set
+CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=16
+CONFIG_DETECT_HUNG_TASK=y
+CONFIG_DIRECT_IO=y
+CONFIG_DMADEVICES=y
+CONFIG_DMA_CACHE_FIQ_BROADCAST=y
+# CONFIG_DMA_CACHE_RWFO is not set
+CONFIG_DMA_ENGINE=y
+CONFIG_DMA_OF=y
+CONFIG_DNOTIFY=y
+CONFIG_DTC=y
+CONFIG_DT_IDLE_STATES=y
+CONFIG_DWMAC_GENERIC=y
+# CONFIG_DWMAC_IPQ806X is not set
+# CONFIG_DWMAC_LPC18XX is not set
+# CONFIG_DWMAC_MESON is not set
+CONFIG_DWMAC_OXNAS=y
+# CONFIG_DWMAC_ROCKCHIP is not set
+# CONFIG_DWMAC_SOCFPGA is not set
+# CONFIG_DWMAC_STI is not set
+# CONFIG_DWMAC_SUNXI is not set
+# CONFIG_DW_DMAC_PCI is not set
+CONFIG_EARLY_PRINTK=y
+CONFIG_EDAC_ATOMIC_SCRUB=y
+CONFIG_EDAC_SUPPORT=y
+CONFIG_FIQ=y
+CONFIG_FIX_EARLYCON_MEM=y
+CONFIG_GENERIC_ALLOCATOR=y
+CONFIG_GENERIC_BUG=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
+CONFIG_GENERIC_IDLE_POLL_SETUP=y
+CONFIG_GENERIC_IO=y
+CONFIG_GENERIC_IRQ_SHOW=y
+CONFIG_GENERIC_IRQ_SHOW_LEVEL=y
+CONFIG_GENERIC_PCI_IOMAP=y
+CONFIG_GENERIC_PINCONF=y
+CONFIG_GENERIC_SCHED_CLOCK=y
+CONFIG_GENERIC_SMP_IDLE_THREAD=y
+CONFIG_GENERIC_STRNCPY_FROM_USER=y
+CONFIG_GENERIC_STRNLEN_USER=y
+CONFIG_GPIOLIB=y
+CONFIG_GPIO_DEVRES=y
+CONFIG_GPIO_GENERIC=y
+CONFIG_GPIO_GENERIC_PLATFORM=y
+CONFIG_GPIO_SYSFS=y
+CONFIG_HANDLE_DOMAIN_IRQ=y
+CONFIG_HARDIRQS_SW_RESEND=y
+CONFIG_HAS_DMA=y
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT_MAP=y
+# CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set
+CONFIG_HAVE_ARCH_AUDITSYSCALL=y
+# CONFIG_HAVE_ARCH_BITREVERSE is not set
+CONFIG_HAVE_ARCH_JUMP_LABEL=y
+CONFIG_HAVE_ARCH_KGDB=y
+CONFIG_HAVE_ARCH_PFN_VALID=y
+CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
+CONFIG_HAVE_ARCH_TRACEHOOK=y
+CONFIG_HAVE_ARM_SCU=y
+CONFIG_HAVE_ARM_TWD=y
+# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
+CONFIG_HAVE_BPF_JIT=y
+CONFIG_HAVE_CC_STACKPROTECTOR=y
+CONFIG_HAVE_CLK=y
+CONFIG_HAVE_CLK_PREPARE=y
+CONFIG_HAVE_CONTEXT_TRACKING=y
+CONFIG_HAVE_C_RECORDMCOUNT=y
+CONFIG_HAVE_DEBUG_KMEMLEAK=y
+CONFIG_HAVE_DMA_API_DEBUG=y
+CONFIG_HAVE_DMA_ATTRS=y
+CONFIG_HAVE_DMA_CONTIGUOUS=y
+CONFIG_HAVE_DYNAMIC_FTRACE=y
+CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
+CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
+CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
+CONFIG_HAVE_FUNCTION_TRACER=y
+CONFIG_HAVE_GENERIC_DMA_COHERENT=y
+CONFIG_HAVE_IDE=y
+CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
+CONFIG_HAVE_KERNEL_GZIP=y
+CONFIG_HAVE_KERNEL_LZ4=y
+CONFIG_HAVE_KERNEL_LZMA=y
+CONFIG_HAVE_KERNEL_LZO=y
+CONFIG_HAVE_KERNEL_XZ=y
+CONFIG_HAVE_MEMBLOCK=y
+CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
+CONFIG_HAVE_NET_DSA=y
+CONFIG_HAVE_OPROFILE=y
+CONFIG_HAVE_OPTPROBES=y
+CONFIG_HAVE_PERF_EVENTS=y
+CONFIG_HAVE_PERF_REGS=y
+CONFIG_HAVE_PERF_USER_STACK_DUMP=y
+CONFIG_HAVE_PROC_CPU=y
+CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
+CONFIG_HAVE_SMP=y
+CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
+CONFIG_HAVE_UID16=y
+CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
+CONFIG_HOTPLUG_CPU=y
+CONFIG_HZ_FIXED=0
+CONFIG_I2C=y
+CONFIG_I2C_ALGOBIT=y
+CONFIG_I2C_BOARDINFO=y
+CONFIG_ICPLUS_PHY=y
+CONFIG_INET_DIAG=y
+CONFIG_INET_TCP_DIAG=y
+CONFIG_INET_UDP_DIAG=y
+CONFIG_INPUT=y
+# CONFIG_INPUT_MISC is not set
+CONFIG_IOMMU_API=y
+CONFIG_IOMMU_HELPER=y
+CONFIG_IOMMU_IO_PGTABLE=y
+CONFIG_IOMMU_IO_PGTABLE_LPAE=y
+# CONFIG_IOMMU_IO_PGTABLE_LPAE_SELFTEST is not set
+CONFIG_IOMMU_SUPPORT=y
+# CONFIG_IP_ADVANCED_ROUTER is not set
+# CONFIG_IP_MULTICAST is not set
+CONFIG_IP_PNP=y
+# CONFIG_IP_PNP_BOOTP is not set
+CONFIG_IP_PNP_DHCP=y
+# CONFIG_IP_PNP_RARP is not set
+CONFIG_IRQCHIP=y
+CONFIG_IRQ_DOMAIN=y
+CONFIG_IRQ_DOMAIN_HIERARCHY=y
+CONFIG_IRQ_FORCED_THREADING=y
+CONFIG_IRQ_TIME_ACCOUNTING=y
+CONFIG_IRQ_WORK=y
+# CONFIG_ISDN is not set
+# CONFIG_JFFS2_FS is not set
+CONFIG_JUMP_LABEL=y
+CONFIG_KALLSYMS=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_KGDB=y
+# CONFIG_KGDB_KDB is not set
+CONFIG_KGDB_SERIAL_CONSOLE=y
+# CONFIG_KGDB_TESTS is not set
+# CONFIG_LDM_DEBUG is not set
+CONFIG_LDM_PARTITION=y
+# CONFIG_LEDS_TRIGGER_DEFAULT_ON is not set
+# CONFIG_LEDS_TRIGGER_NETDEV is not set
+# CONFIG_LEDS_TRIGGER_TIMER is not set
+CONFIG_LIBFDT=y
+CONFIG_LOCKUP_DETECTOR=y
+CONFIG_LOCK_SPIN_ON_OWNER=y
+CONFIG_LZ4_COMPRESS=y
+CONFIG_LZ4_DECOMPRESS=y
+CONFIG_LZO_COMPRESS=y
+CONFIG_LZO_DECOMPRESS=y
+CONFIG_MACH_OX820=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_MAILBOX=y
+# CONFIG_MAILBOX_TEST is not set
+CONFIG_MDIO_BOARDINFO=y
+CONFIG_MFD_SYSCON=y
+CONFIG_MIGHT_HAVE_PCI=y
+CONFIG_MIGRATION=y
+CONFIG_MODULES_USE_ELF_REL=y
+# CONFIG_MODULE_STRIPPED is not set
+# CONFIG_MTD_CFI is not set
+# CONFIG_MTD_COMPLEX_MAPPINGS is not set
+CONFIG_MTD_NAND=y
+CONFIG_MTD_NAND_ECC=y
+CONFIG_MTD_NAND_OXNAS=y
+CONFIG_MTD_NAND_PLATFORM=y
+CONFIG_MTD_SPLIT_FIRMWARE=y
+CONFIG_MTD_UBI=y
+CONFIG_MTD_UBI_BEB_LIMIT=20
+CONFIG_MTD_UBI_BLOCK=y
+# CONFIG_MTD_UBI_FASTMAP is not set
+# CONFIG_MTD_UBI_GLUEBI is not set
+CONFIG_MTD_UBI_WL_THRESHOLD=4096
+CONFIG_MULTI_IRQ_HANDLER=y
+CONFIG_MUTEX_SPIN_ON_OWNER=y
+CONFIG_NEED_DMA_MAP_STATE=y
+CONFIG_NEED_SG_DMA_LENGTH=y
+CONFIG_NET_FLOW_LIMIT=y
+CONFIG_NET_PTP_CLASSIFY=y
+CONFIG_NLS=y
+CONFIG_NO_BOOTMEM=y
+CONFIG_NO_HZ_COMMON=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NR_CPUS=2
+CONFIG_OF=y
+CONFIG_OF_ADDRESS=y
+CONFIG_OF_ADDRESS_PCI=y
+CONFIG_OF_EARLY_FLATTREE=y
+CONFIG_OF_FLATTREE=y
+CONFIG_OF_GPIO=y
+CONFIG_OF_IOMMU=y
+CONFIG_OF_IRQ=y
+CONFIG_OF_MDIO=y
+CONFIG_OF_MTD=y
+CONFIG_OF_NET=y
+CONFIG_OF_PCI=y
+CONFIG_OF_PCI_IRQ=y
+CONFIG_OF_RESERVED_MEM=y
+CONFIG_OLD_SIGACTION=y
+CONFIG_OLD_SIGSUSPEND3=y
+CONFIG_PACKET_DIAG=y
+CONFIG_PAGE_OFFSET=0xC0000000
+CONFIG_PCI=y
+CONFIG_PCIEAER=y
+CONFIG_PCIEASPM=y
+# CONFIG_PCIEASPM_DEBUG is not set
+CONFIG_PCIEASPM_DEFAULT=y
+# CONFIG_PCIEASPM_PERFORMANCE is not set
+# CONFIG_PCIEASPM_POWERSAVE is not set
+CONFIG_PCIEPORTBUS=y
+CONFIG_PCIE_PME=y
+# CONFIG_PCI_DOMAINS_GENERIC is not set
+CONFIG_PCI_OXNAS=y
+CONFIG_PERF_USE_VMALLOC=y
+CONFIG_PGTABLE_LEVELS=2
+CONFIG_PHYLIB=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_OXNAS=y
+CONFIG_PLXTECH_RPS=y
+CONFIG_PM=y
+CONFIG_PM_CLK=y
+# CONFIG_PM_DEBUG is not set
+CONFIG_POWER_RESET=y
+# CONFIG_POWER_RESET_BRCMSTB is not set
+CONFIG_POWER_RESET_GPIO=y
+CONFIG_POWER_RESET_SYSCON_POWEROFF=y
+CONFIG_POWER_SUPPLY=y
+CONFIG_PPS=y
+CONFIG_PRINTK_TIME=y
+CONFIG_PTP_1588_CLOCK=y
+CONFIG_PWM=y
+CONFIG_PWM_SYSFS=y
+CONFIG_RAS=y
+CONFIG_RATIONAL=y
+CONFIG_RCU_CPU_STALL_TIMEOUT=21
+CONFIG_RCU_STALL_COMMON=y
+CONFIG_REALTEK_PHY=y
+CONFIG_REGMAP=y
+CONFIG_REGMAP_MMIO=y
+CONFIG_RELAY=y
+CONFIG_RESET_CONTROLLER=y
+CONFIG_RESET_CONTROLLER_OXNAS=y
+CONFIG_RFS_ACCEL=y
+CONFIG_RPS=y
+CONFIG_RTC_CLASS=y
+# CONFIG_RTC_DRV_CMOS is not set
+CONFIG_RWSEM_SPIN_ON_OWNER=y
+CONFIG_RWSEM_XCHGADD_ALGORITHM=y
+CONFIG_SCHED_HRTICK=y
+# CONFIG_SCHED_INFO is not set
+CONFIG_SCSI=y
+CONFIG_SERIAL_8250_FSL=y
+CONFIG_SERIAL_8250_NR_UARTS=1
+CONFIG_SERIAL_8250_PCI=y
+CONFIG_SERIAL_8250_RUNTIME_UARTS=1
+# CONFIG_SERIAL_KGDB_NMI is not set
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_SG_SPLIT is not set
+CONFIG_SMP=y
+CONFIG_SMP_ON_UP=y
+CONFIG_SOCK_DIAG=y
+CONFIG_SRCU=y
+CONFIG_STMMAC_ETH=y
+CONFIG_STMMAC_PLATFORM=y
+# CONFIG_STRIP_ASM_SYMS is not set
+# CONFIG_SUNXI_SRAM is not set
+CONFIG_SWIOTLB=y
+CONFIG_SYS_SUPPORTS_APM_EMULATION=y
+CONFIG_TREE_RCU=y
+CONFIG_UBIFS_FS=y
+# CONFIG_UBIFS_FS_ADVANCED_COMPR is not set
+CONFIG_UBIFS_FS_LZO=y
+CONFIG_UBIFS_FS_XZ=y
+CONFIG_UBIFS_FS_ZLIB=y
+CONFIG_UNCOMPRESS_INCLUDE="mach/uncompress.h"
+CONFIG_USB=y
+CONFIG_USB_COMMON=y
+# CONFIG_USB_EHCI_HCD is not set
+CONFIG_USB_SUPPORT=y
+# CONFIG_USB_UHCI_HCD is not set
+CONFIG_USE_OF=y
+CONFIG_VECTORS_BASE=0xffff0000
+# CONFIG_VFIO is not set
+# CONFIG_VFP is not set
+CONFIG_VM_EVENT_COUNTERS=y
+CONFIG_WATCHDOG_CORE=y
+CONFIG_WATCHDOG_NOWAYOUT=y
+CONFIG_XPS=y
+CONFIG_XZ_DEC_ARM=y
+CONFIG_XZ_DEC_BCJ=y
+CONFIG_ZBOOT_ROM_BSS=0
+CONFIG_ZBOOT_ROM_TEXT=0
+CONFIG_ZLIB_DEFLATE=y
+CONFIG_ZLIB_INFLATE=y
+CONFIG_ZONE_DMA_FLAG=0
diff --git a/target/linux/oxnas/patches-4.4/010-arm_introduce-dma-fiq-irq-broadcast.patch b/target/linux/oxnas/patches-4.4/010-arm_introduce-dma-fiq-irq-broadcast.patch
new file mode 100644
index 0000000000..b59c06e2ab
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/010-arm_introduce-dma-fiq-irq-broadcast.patch
@@ -0,0 +1,68 @@
+--- a/arch/arm/include/asm/glue-cache.h
++++ b/arch/arm/include/asm/glue-cache.h
+@@ -156,9 +156,15 @@ static inline void nop_dma_unmap_area(co
+ #define __cpuc_flush_user_range		__glue(_CACHE,_flush_user_cache_range)
+ #define __cpuc_coherent_kern_range	__glue(_CACHE,_coherent_kern_range)
+ #define __cpuc_coherent_user_range	__glue(_CACHE,_coherent_user_range)
++#ifndef CONFIG_DMA_CACHE_FIQ_BROADCAST
+ #define __cpuc_flush_dcache_area	__glue(_CACHE,_flush_kern_dcache_area)
+ 
+ #define dmac_flush_range		__glue(_CACHE,_dma_flush_range)
++#else
++#define __cpuc_flush_dcache_area	__glue(fiq,_flush_kern_dcache_area)
++
++#define dmac_flush_range		__glue(fiq,_dma_flush_range)
++#endif /* CONFIG_DMA_CACHE_FIQ_BROADCAST */
+ #endif
+ 
+ #endif
+--- a/arch/arm/mm/Kconfig
++++ b/arch/arm/mm/Kconfig
+@@ -866,6 +866,17 @@ config DMA_CACHE_RWFO
+ 	  in hardware, other workarounds are needed (e.g. cache
+ 	  maintenance broadcasting in software via FIQ).
+ 
++config DMA_CACHE_FIQ_BROADCAST
++	bool "Enable fiq broadcast DMA cache maintenance"
++	depends on CPU_V6K && SMP
++	select FIQ
++	help
++	  The Snoop Control Unit on ARM11MPCore does not detect the
++	  cache maintenance operations and the dma_{map,unmap}_area()
++	  functions may leave stale cache entries on other CPUs. By
++	  enabling this option, fiq broadcast in the ARMv6
++	  DMA cache maintenance functions is performed.
++
+ config OUTER_CACHE
+ 	bool
+ 
+--- a/arch/arm/mm/flush.c
++++ b/arch/arm/mm/flush.c
+@@ -329,7 +329,11 @@ void flush_dcache_page(struct page *page
+ 
+ 	mapping = page_mapping(page);
+ 
++#ifndef CONFIG_DMA_CACHE_FIQ_BROADCAST
+ 	if (!cache_ops_need_broadcast() &&
++#else
++	if (
++#endif
+ 	    mapping && !page_mapped(page))
+ 		clear_bit(PG_dcache_clean, &page->flags);
+ 	else {
+--- a/arch/arm/mm/dma.h
++++ b/arch/arm/mm/dma.h
+@@ -4,8 +4,13 @@
+ #include <asm/glue-cache.h>
+ 
+ #ifndef MULTI_CACHE
++#ifndef CONFIG_DMA_CACHE_FIQ_BROADCAST
+ #define dmac_map_area			__glue(_CACHE,_dma_map_area)
+ #define dmac_unmap_area 		__glue(_CACHE,_dma_unmap_area)
++#else
++#define dmac_map_area			__glue(fiq,_dma_map_area)
++#define dmac_unmap_area			__glue(fiq,_dma_unmap_area)
++#endif /* CONFIG_DMA_CACHE_FIQ_BROADCAST */
+ 
+ /*
+  * These are private to the dma-mapping API.  Do not use directly.
diff --git a/target/linux/oxnas/patches-4.4/250-add-plxtech-vendor-prefix.patch b/target/linux/oxnas/patches-4.4/250-add-plxtech-vendor-prefix.patch
new file mode 100644
index 0000000000..d6c5c627a6
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/250-add-plxtech-vendor-prefix.patch
@@ -0,0 +1,10 @@
+--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
++++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
+@@ -174,6 +174,7 @@ picochip	Picochip Ltd
+ plathome	Plat'Home Co., Ltd.
+ plda	PLDA
+ pixcir  PIXCIR MICROELECTRONICS Co., Ltd
++plxtech	PLX Technology, Inc.
+ pulsedlight	PulsedLight, Inc
+ powervr	PowerVR (deprecated, use img)
+ qca	Qualcomm Atheros, Inc.
diff --git a/target/linux/oxnas/patches-4.4/300-introduce-oxnas-platform.patch b/target/linux/oxnas/patches-4.4/300-introduce-oxnas-platform.patch
new file mode 100644
index 0000000000..b3a8dc0f90
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/300-introduce-oxnas-platform.patch
@@ -0,0 +1,71 @@
+--- a/arch/arm/Kconfig
++++ b/arch/arm/Kconfig
+@@ -602,6 +602,19 @@ config ARCH_LPC32XX
+ 	help
+ 	  Support for the NXP LPC32XX family of processors
+ 
++config ARCH_OXNAS
++	bool "Oxford Semiconductor 815/820/825 NAS SoC"
++	select ARM_GIC
++	select ARCH_REQUIRE_GPIOLIB
++	select CLKDEV_LOOKUP
++	select GENERIC_CLOCKEVENTS
++	select COMMON_CLK
++	select MIGHT_HAVE_PCI
++	select ARCH_HAS_RESET_CONTROLLER
++	help
++		This enables support for Oxford 815/820/825 NAS SoC
++		later renamed to PLXTECH NAS782x.
++
+ config ARCH_PXA
+ 	bool "PXA2xx/PXA3xx-based"
+ 	depends on MMU
+@@ -882,6 +895,8 @@ source "arch/arm/mach-omap2/Kconfig"
+ 
+ source "arch/arm/mach-orion5x/Kconfig"
+ 
++source "arch/arm/mach-oxnas/Kconfig"
++
+ source "arch/arm/mach-picoxcell/Kconfig"
+ 
+ source "arch/arm/mach-pxa/Kconfig"
+--- a/arch/arm/Makefile
++++ b/arch/arm/Makefile
+@@ -200,6 +200,7 @@ machine-$(CONFIG_ARCH_NSPIRE)		+= nspire
+ machine-$(CONFIG_ARCH_OMAP1)		+= omap1
+ machine-$(CONFIG_ARCH_OMAP2PLUS)	+= omap2
+ machine-$(CONFIG_ARCH_ORION5X)		+= orion5x
++machine-$(CONFIG_ARCH_OXNAS)		+= oxnas
+ machine-$(CONFIG_ARCH_PICOXCELL)	+= picoxcell
+ machine-$(CONFIG_ARCH_PXA)		+= pxa
+ machine-$(CONFIG_ARCH_QCOM)		+= qcom
+--- a/arch/arm/boot/dts/Makefile
++++ b/arch/arm/boot/dts/Makefile
+@@ -497,6 +497,7 @@ dtb-$(CONFIG_ARCH_ORION5X) += \
+ 	orion5x-lswsgl.dtb \
+ 	orion5x-maxtor-shared-storage-2.dtb \
+ 	orion5x-rd88f5182-nas.dtb
++dtb-$(CONFIG_ARCH_OXNAS) += ox820-pogoplug-pro.dtb
+ dtb-$(CONFIG_ARCH_PRIMA2) += \
+ 	prima2-evb.dtb
+ dtb-$(CONFIG_ARCH_QCOM) += \
+--- a/arch/arm/tools/mach-types
++++ b/arch/arm/tools/mach-types
+@@ -228,6 +228,7 @@ edb9302a		MACH_EDB9302A		EDB9302A		1127
+ edb9307a		MACH_EDB9307A		EDB9307A		1128
+ omap_3430sdp		MACH_OMAP_3430SDP	OMAP_3430SDP		1138
+ vstms			MACH_VSTMS		VSTMS			1140
++ox820			MACH_OX820		OX820			1152
+ micro9m			MACH_MICRO9M		MICRO9M			1169
+ bug			MACH_BUG		BUG			1179
+ at91sam9263ek		MACH_AT91SAM9263EK	AT91SAM9263EK		1202
+--- a/drivers/clk/Makefile
++++ b/drivers/clk/Makefile
+@@ -32,6 +32,7 @@ obj-$(CONFIG_ARCH_MB86S7X)		+= clk-mb86s
+ obj-$(CONFIG_ARCH_MOXART)		+= clk-moxart.o
+ obj-$(CONFIG_ARCH_NOMADIK)		+= clk-nomadik.o
+ obj-$(CONFIG_ARCH_NSPIRE)		+= clk-nspire.o
++obj-$(CONFIG_ARCH_OXNAS)		+= clk-oxnas.o
+ obj-$(CONFIG_COMMON_CLK_PALMAS)		+= clk-palmas.o
+ obj-$(CONFIG_CLK_QORIQ)			+= clk-qoriq.o
+ obj-$(CONFIG_COMMON_CLK_RK808)		+= clk-rk808.o
diff --git a/target/linux/oxnas/patches-4.4/310-oxnas-clocksource.patch b/target/linux/oxnas/patches-4.4/310-oxnas-clocksource.patch
new file mode 100644
index 0000000000..efb058dbb4
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/310-oxnas-clocksource.patch
@@ -0,0 +1,25 @@
+--- a/drivers/clocksource/Kconfig
++++ b/drivers/clocksource/Kconfig
+@@ -222,6 +222,12 @@ config VF_PIT_TIMER
+ 	help
+ 	  Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
+ 
++config CLKSRC_RPS_TIMER
++	def_bool y if ARCH_OXNAS
++	select CLKSRC_MMIO
++	help
++	  This option enables support for the oxnas rps timers.
++
+ config SYS_SUPPORTS_SH_CMT
+         bool
+ 
+--- a/drivers/clocksource/Makefile
++++ b/drivers/clocksource/Makefile
+@@ -41,6 +41,7 @@ obj-$(CONFIG_CLKSRC_EXYNOS_MCT)	+= exyno
+ obj-$(CONFIG_CLKSRC_LPC32XX)	+= time-lpc32xx.o
+ obj-$(CONFIG_CLKSRC_SAMSUNG_PWM)	+= samsung_pwm_timer.o
+ obj-$(CONFIG_FSL_FTM_TIMER)	+= fsl_ftm_timer.o
++obj-$(CONFIG_CLKSRC_RPS_TIMER)	+= oxnas_rps_timer.o
+ obj-$(CONFIG_VF_PIT_TIMER)	+= vf_pit_timer.o
+ obj-$(CONFIG_CLKSRC_QCOM)	+= qcom-timer.o
+ obj-$(CONFIG_MTK_TIMER)		+= mtk_timer.o
diff --git a/target/linux/oxnas/patches-4.4/320-oxnas-irqchip.patch b/target/linux/oxnas/patches-4.4/320-oxnas-irqchip.patch
new file mode 100644
index 0000000000..62224b63b1
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/320-oxnas-irqchip.patch
@@ -0,0 +1,34 @@
+--- a/drivers/irqchip/Kconfig
++++ b/drivers/irqchip/Kconfig
+@@ -27,6 +27,11 @@ config ARM_GIC_V3_ITS
+ 	bool
+ 	select PCI_MSI_IRQ_DOMAIN
+ 
++config PLXTECH_RPS
++	def_bool y if ARHC_OXNAS
++	depends on ARCH_OXNAS
++	select IRQ_DOMAIN
++
+ config ARM_NVIC
+ 	bool
+ 	select IRQ_DOMAIN
+--- a/drivers/irqchip/Makefile
++++ b/drivers/irqchip/Makefile
+@@ -34,6 +34,7 @@ obj-$(CONFIG_IRQ_MIPS_CPU)		+= irq-mips-
+ obj-$(CONFIG_SIRF_IRQ)			+= irq-sirfsoc.o
+ obj-$(CONFIG_RENESAS_INTC_IRQPIN)	+= irq-renesas-intc-irqpin.o
+ obj-$(CONFIG_RENESAS_IRQC)		+= irq-renesas-irqc.o
++obj-$(CONFIG_PLXTECH_RPS)		+= irq-rps.o
+ obj-$(CONFIG_VERSATILE_FPGA_IRQ)	+= irq-versatile-fpga.o
+ obj-$(CONFIG_ARCH_NSPIRE)		+= irq-zevio.o
+ obj-$(CONFIG_ARCH_VT8500)		+= irq-vt8500.o
+--- a/drivers/irqchip/irq-gic.c
++++ b/drivers/irqchip/irq-gic.c
+@@ -1245,6 +1245,7 @@ IRQCHIP_DECLARE(arm1176jzf_dc_gic, "arm,
+ IRQCHIP_DECLARE(cortex_a15_gic, "arm,cortex-a15-gic", gic_of_init);
+ IRQCHIP_DECLARE(cortex_a9_gic, "arm,cortex-a9-gic", gic_of_init);
+ IRQCHIP_DECLARE(cortex_a7_gic, "arm,cortex-a7-gic", gic_of_init);
++IRQCHIP_DECLARE(arm11_mpcore_gic, "arm,arm11mp-gic", gic_of_init);
+ IRQCHIP_DECLARE(msm_8660_qgic, "qcom,msm-8660-qgic", gic_of_init);
+ IRQCHIP_DECLARE(msm_qgic2, "qcom,msm-qgic2", gic_of_init);
+ IRQCHIP_DECLARE(pl390, "arm,pl390", gic_of_init);
diff --git a/target/linux/oxnas/patches-4.4/330-oxnas-pinctrl.patch b/target/linux/oxnas/patches-4.4/330-oxnas-pinctrl.patch
new file mode 100644
index 0000000000..479bfddc50
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/330-oxnas-pinctrl.patch
@@ -0,0 +1,28 @@
+--- a/drivers/pinctrl/Kconfig
++++ b/drivers/pinctrl/Kconfig
+@@ -227,6 +227,15 @@ config PINCTRL_COH901
+ 	  COH 901 335 and COH 901 571/3. They contain 3, 5 or 7
+ 	  ports of 8 GPIO pins each.
+ 
++config PINCTRL_OXNAS
++	bool "OXNAS pinctrl driver"
++	depends on OF
++	depends on ARCH_OXNAS
++	select PINMUX
++	select PINCONF
++	help
++	  Say Y here to enable the oxnas pinctrl driver
++
+ config PINCTRL_PALMAS
+ 	bool "Pinctrl driver for the PALMAS Series MFD devices"
+ 	depends on OF && MFD_PALMAS
+--- a/drivers/pinctrl/Makefile
++++ b/drivers/pinctrl/Makefile
+@@ -17,6 +17,7 @@ obj-$(CONFIG_PINCTRL_AMD)	+= pinctrl-amd
+ obj-$(CONFIG_PINCTRL_DIGICOLOR)	+= pinctrl-digicolor.o
+ obj-$(CONFIG_PINCTRL_FALCON)	+= pinctrl-falcon.o
+ obj-$(CONFIG_PINCTRL_MESON)	+= meson/
++obj-$(CONFIG_PINCTRL_OXNAS)	+= pinctrl-oxnas.o
+ obj-$(CONFIG_PINCTRL_PALMAS)	+= pinctrl-palmas.o
+ obj-$(CONFIG_PINCTRL_PISTACHIO)	+= pinctrl-pistachio.o
+ obj-$(CONFIG_PINCTRL_ROCKCHIP)	+= pinctrl-rockchip.o
diff --git a/target/linux/oxnas/patches-4.4/340-oxnas-pcie.patch b/target/linux/oxnas/patches-4.4/340-oxnas-pcie.patch
new file mode 100644
index 0000000000..374f9b96f3
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/340-oxnas-pcie.patch
@@ -0,0 +1,22 @@
+--- a/drivers/pci/host/Kconfig
++++ b/drivers/pci/host/Kconfig
+@@ -172,4 +172,9 @@ config PCI_HISI
+ 	help
+ 	  Say Y here if you want PCIe controller support on HiSilicon HIP05 SoC
+ 
++config PCI_OXNAS
++	bool "PLX Oxnas PCIe controller"
++	depends on ARCH_OXNAS
++	select PCIEPORTBUS
++
+ endmenu
+--- a/drivers/pci/host/Makefile
++++ b/drivers/pci/host/Makefile
+@@ -3,6 +3,7 @@ obj-$(CONFIG_PCI_DRA7XX) += pci-dra7xx.o
+ obj-$(CONFIG_PCI_EXYNOS) += pci-exynos.o
+ obj-$(CONFIG_PCI_IMX6) += pci-imx6.o
+ obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o
++obj-$(CONFIG_PCI_OXNAS) += pcie-oxnas.o
+ obj-$(CONFIG_PCI_TEGRA) += pci-tegra.o
+ obj-$(CONFIG_PCI_RCAR_GEN2) += pci-rcar-gen2.o
+ obj-$(CONFIG_PCI_RCAR_GEN2_PCIE) += pcie-rcar.o
diff --git a/target/linux/oxnas/patches-4.4/350-oxnas-reset.patch b/target/linux/oxnas/patches-4.4/350-oxnas-reset.patch
new file mode 100644
index 0000000000..e9aaf4b430
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/350-oxnas-reset.patch
@@ -0,0 +1,20 @@
+--- a/drivers/reset/Kconfig
++++ b/drivers/reset/Kconfig
+@@ -12,4 +12,9 @@ menuconfig RESET_CONTROLLER
+ 
+ 	  If unsure, say no.
+ 
++config RESET_CONTROLLER_OXNAS
++	bool
++	select RESET_CONTROLLER
++
+ source "drivers/reset/sti/Kconfig"
++
+--- a/drivers/reset/Makefile
++++ b/drivers/reset/Makefile
+@@ -1,4 +1,5 @@
+ obj-$(CONFIG_RESET_CONTROLLER) += core.o
++obj-$(CONFIG_RESET_CONTROLLER_OXNAS) += reset-ox820.o
+ obj-$(CONFIG_ARCH_LPC18XX) += reset-lpc18xx.o
+ obj-$(CONFIG_ARCH_SOCFPGA) += reset-socfpga.o
+ obj-$(CONFIG_ARCH_BERLIN) += reset-berlin.o
diff --git a/target/linux/oxnas/patches-4.4/400-oxnas-nand.patch b/target/linux/oxnas/patches-4.4/400-oxnas-nand.patch
new file mode 100644
index 0000000000..4e742786e0
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/400-oxnas-nand.patch
@@ -0,0 +1,25 @@
+--- a/drivers/mtd/nand/Kconfig
++++ b/drivers/mtd/nand/Kconfig
+@@ -546,4 +546,12 @@ config MTD_NAND_HISI504
+ 	help
+ 	  Enables support for NAND controller on Hisilicon SoC Hip04.
+ 
++config MTD_NAND_OXNAS
++	tristate "Support for NAND on Plxtech NAS782X SoC"
++	depends on ARCH_OXNAS
++	select MTD_NAND_PLATFORM
++	help
++	  Enables support for NAND Flash chips on Plxtech NAS782X SoCs. NAND is attached
++	  to the STATIC Unit.
++
+ endif # MTD_NAND
+--- a/drivers/mtd/nand/Makefile
++++ b/drivers/mtd/nand/Makefile
+@@ -46,6 +46,7 @@ obj-$(CONFIG_MTD_NAND_SOCRATES)		+= socr
+ obj-$(CONFIG_MTD_NAND_TXX9NDFMC)	+= txx9ndfmc.o
+ obj-$(CONFIG_MTD_NAND_NUC900)		+= nuc900_nand.o
+ obj-$(CONFIG_MTD_NAND_MPC5121_NFC)	+= mpc5121_nfc.o
++obj-$(CONFIG_MTD_NAND_OXNAS)		+= oxnas_nand.o
+ obj-$(CONFIG_MTD_NAND_VF610_NFC)	+= vf610_nfc.o
+ obj-$(CONFIG_MTD_NAND_RICOH)		+= r852.o
+ obj-$(CONFIG_MTD_NAND_JZ4740)		+= jz4740_nand.o
diff --git a/target/linux/oxnas/patches-4.4/500-oxnas-sata.patch b/target/linux/oxnas/patches-4.4/500-oxnas-sata.patch
new file mode 100644
index 0000000000..3891dc1bc2
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/500-oxnas-sata.patch
@@ -0,0 +1,26 @@
+--- a/drivers/ata/Kconfig
++++ b/drivers/ata/Kconfig
+@@ -429,6 +429,13 @@ config SATA_VITESSE
+ 
+ 	  If unsure, say N.
+ 
++config SATA_OXNAS
++	tristate "PLXTECH NAS782X SATA support"
++	help
++	  This option enables support for Nas782x Serial ATA controller.
++
++	  If unsure, say N.
++
+ comment "PATA SFF controllers with BMDMA"
+ 
+ config PATA_ALI
+--- a/drivers/ata/Makefile
++++ b/drivers/ata/Makefile
+@@ -40,6 +40,7 @@ obj-$(CONFIG_SATA_SVW)		+= sata_svw.o
+ obj-$(CONFIG_SATA_ULI)		+= sata_uli.o
+ obj-$(CONFIG_SATA_VIA)		+= sata_via.o
+ obj-$(CONFIG_SATA_VITESSE)	+= sata_vsc.o
++obj-$(CONFIG_SATA_OXNAS)	+= sata_oxnas.o
+ 
+ # SFF PATA w/ BMDMA
+ obj-$(CONFIG_PATA_ALI)		+= pata_ali.o
diff --git a/target/linux/oxnas/patches-4.4/700-oxnas-dwmac.patch b/target/linux/oxnas/patches-4.4/700-oxnas-dwmac.patch
new file mode 100644
index 0000000000..5de25d2e82
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/700-oxnas-dwmac.patch
@@ -0,0 +1,29 @@
+--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
++++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
+@@ -69,6 +69,16 @@ config DWMAC_MESON
+ 	  the stmmac device driver. This driver is used for Meson6 and
+ 	  Meson8 SoCs.
+ 
++config DWMAC_OXNAS
++	tristate "Oxnas gmac support"
++	default ARCH_OXNAS
++	depends on OF && ARCH_OXNAS
++	help
++	  Support for Ethernet controller on Oxnas SoCs.
++
++	  This selects the Oxford OX82x SoC glue layer support for
++	  the stmmac device driver.
++
+ config DWMAC_ROCKCHIP
+ 	tristate "Rockchip dwmac support"
+ 	default ARCH_ROCKCHIP
+--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
++++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
+@@ -9,6 +9,7 @@ obj-$(CONFIG_STMMAC_PLATFORM)	+= stmmac-
+ obj-$(CONFIG_DWMAC_IPQ806X)	+= dwmac-ipq806x.o
+ obj-$(CONFIG_DWMAC_LPC18XX)	+= dwmac-lpc18xx.o
+ obj-$(CONFIG_DWMAC_MESON)	+= dwmac-meson.o
++obj-$(CONFIG_DWMAC_OXNAS)	+= dwmac-oxnas.o
+ obj-$(CONFIG_DWMAC_ROCKCHIP)	+= dwmac-rk.o
+ obj-$(CONFIG_DWMAC_SOCFPGA)	+= dwmac-socfpga.o
+ obj-$(CONFIG_DWMAC_STI)		+= dwmac-sti.o
diff --git a/target/linux/oxnas/patches-4.4/800-oxnas-ehci.patch b/target/linux/oxnas/patches-4.4/800-oxnas-ehci.patch
new file mode 100644
index 0000000000..5b25afc953
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/800-oxnas-ehci.patch
@@ -0,0 +1,26 @@
+--- a/drivers/usb/host/Kconfig
++++ b/drivers/usb/host/Kconfig
+@@ -313,6 +313,13 @@ config USB_OCTEON_EHCI
+ 	  USB 2.0 device support.  All CN6XXX based chips with USB are
+ 	  supported.
+ 
++config USB_EHCI_OXNAS
++	tristate "OXNAS EHCI Module"
++	depends on USB_EHCI_HCD && ARCH_OXNAS
++	select USB_EHCI_ROOT_HUB_TT
++	---help---
++	  Enable support for the OX820 SOC's on-chip EHCI controller.
++
+ endif # USB_EHCI_HCD
+ 
+ config USB_OXU210HP_HCD
+--- a/drivers/usb/host/Makefile
++++ b/drivers/usb/host/Makefile
+@@ -41,6 +41,7 @@ obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-
+ obj-$(CONFIG_USB_EHCI_MSM)	+= ehci-msm.o
+ obj-$(CONFIG_USB_EHCI_TEGRA)	+= ehci-tegra.o
+ obj-$(CONFIG_USB_W90X900_EHCI)	+= ehci-w90x900.o
++obj-$(CONFIG_USB_EHCI_OXNAS)	+= ehci-oxnas.o
+ 
+ obj-$(CONFIG_USB_OXU210HP_HCD)	+= oxu210hp-hcd.o
+ obj-$(CONFIG_USB_ISP116X_HCD)	+= isp116x-hcd.o
diff --git a/target/linux/oxnas/patches-4.4/900-more-boards.patch b/target/linux/oxnas/patches-4.4/900-more-boards.patch
new file mode 100644
index 0000000000..19e1e8275b
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/900-more-boards.patch
@@ -0,0 +1,14 @@
+--- a/arch/arm/boot/dts/Makefile
++++ b/arch/arm/boot/dts/Makefile
+@@ -497,7 +497,10 @@ dtb-$(CONFIG_ARCH_ORION5X) += \
+ 	orion5x-lswsgl.dtb \
+ 	orion5x-maxtor-shared-storage-2.dtb \
+ 	orion5x-rd88f5182-nas.dtb
+-dtb-$(CONFIG_ARCH_OXNAS) += ox820-pogoplug-pro.dtb
++dtb-$(CONFIG_ARCH_OXNAS) += ox820-pogoplug-pro.dtb \
++	ox820-pogoplug-v3.dtb \
++	ox820-stg212.dtb \
++	ox820-kd20.dtb
+ dtb-$(CONFIG_ARCH_PRIMA2) += \
+ 	prima2-evb.dtb
+ dtb-$(CONFIG_ARCH_QCOM) += \
diff --git a/target/linux/oxnas/patches-4.4/999-libata-hacks.patch b/target/linux/oxnas/patches-4.4/999-libata-hacks.patch
new file mode 100644
index 0000000000..e9208aea4c
--- /dev/null
+++ b/target/linux/oxnas/patches-4.4/999-libata-hacks.patch
@@ -0,0 +1,57 @@
+--- a/drivers/ata/libata-core.c
++++ b/drivers/ata/libata-core.c
+@@ -1589,6 +1589,14 @@ unsigned ata_exec_internal_sg(struct ata
+ 		return AC_ERR_SYSTEM;
+ 	}
+ 
++	if (ap->ops->acquire_hw && !ap->ops->acquire_hw(ap, 0, 0)) {
++		spin_unlock_irqrestore(ap->lock, flags);
++		if (!ap->ops->acquire_hw(ap, 1, (2*HZ))) {
++			return AC_ERR_TIMEOUT;
++		}
++		spin_lock_irqsave(ap->lock, flags);
++	}
++
+ 	/* initialize internal qc */
+ 
+ 	/* XXX: Tag 0 is used for drivers with legacy EH as some
+@@ -4781,6 +4789,9 @@ struct ata_queued_cmd *ata_qc_new_init(s
+ 	if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
+ 		return NULL;
+ 
++	if (ap->ops->qc_new && ap->ops->qc_new(ap))
++		return NULL;
++
+ 	/* libsas case */
+ 	if (ap->flags & ATA_FLAG_SAS_HOST) {
+ 		tag = ata_sas_allocate_tag(ap);
+@@ -4826,6 +4837,8 @@ void ata_qc_free(struct ata_queued_cmd *
+ 		qc->tag = ATA_TAG_POISON;
+ 		if (ap->flags & ATA_FLAG_SAS_HOST)
+ 			ata_sas_free_tag(tag, ap);
++		if (ap->ops->qc_free)
++			ap->ops->qc_free(qc);
+ 	}
+ }
+ 
+--- a/include/linux/libata.h
++++ b/include/linux/libata.h
+@@ -906,6 +906,8 @@ struct ata_port_operations {
+ 	void (*qc_prep)(struct ata_queued_cmd *qc);
+ 	unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
+ 	bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
++	int (*qc_new)(struct ata_port *ap);
++	void (*qc_free)(struct ata_queued_cmd *qc);
+ 
+ 	/*
+ 	 * Configuration and exception handling
+@@ -996,6 +998,9 @@ struct ata_port_operations {
+ 	void (*phy_reset)(struct ata_port *ap);
+ 	void (*eng_timeout)(struct ata_port *ap);
+ 
++	int (*acquire_hw)(struct ata_port *ap, int may_sleep,
++			  int timeout_jiffies);
++
+ 	/*
+ 	 * ->inherits must be the last field and all the preceding
+ 	 * fields must be pointers.