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Subject[PATCH 1/1] drivers: misc: Add support for ANDROID_PMEM
Date
Add initial support for Android pmem allocator.

Signed-off-by: Balint Czobor <czoborbalint@gmail.com>
---
arch/arm/include/asm/cacheflush.h | 4 +
arch/arm/include/asm/mach/map.h | 3 +
arch/arm/mach-msm/Makefile | 1 +
arch/arm/mach-msm/include/mach/memory.h | 139 ++
arch/arm/mach-msm/include/mach/msm_memtypes.h | 70 +
arch/arm/mach-msm/include/mach/socinfo.h | 360 +++
arch/arm/mach-msm/memory.c | 452 ++++
drivers/misc/Kconfig | 4 +
drivers/misc/Makefile | 1 +
drivers/misc/pmem.c | 2962 +++++++++++++++++++++++++
include/linux/android_pmem.h | 189 ++
include/linux/fmem.h | 62 +
include/linux/memory_alloc.h | 58 +
13 files changed, 4305 insertions(+)
create mode 100644 arch/arm/mach-msm/include/mach/memory.h
create mode 100644 arch/arm/mach-msm/include/mach/msm_memtypes.h
create mode 100644 arch/arm/mach-msm/include/mach/socinfo.h
create mode 100644 arch/arm/mach-msm/memory.c
create mode 100644 drivers/misc/pmem.c
create mode 100644 include/linux/android_pmem.h
create mode 100644 include/linux/fmem.h
create mode 100644 include/linux/memory_alloc.h

diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h
index 17d0ae8..c133794 100644
--- a/arch/arm/include/asm/cacheflush.h
+++ b/arch/arm/include/asm/cacheflush.h
@@ -142,6 +142,8 @@ extern struct cpu_cache_fns cpu_cache;
*/
#define dmac_map_area cpu_cache.dma_map_area
#define dmac_unmap_area cpu_cache.dma_unmap_area
+#define dmac_inv_range cpu_cache.dma_inv_range
+#define dmac_clean_range cpu_cache.dma_clean_range
#define dmac_flush_range cpu_cache.dma_flush_range

#else
@@ -163,6 +165,8 @@ extern void __cpuc_flush_dcache_area(void *, size_t);
*/
extern void dmac_map_area(const void *, size_t, int);
extern void dmac_unmap_area(const void *, size_t, int);
+extern void dmac_inv_range(const void *, const void *);
+extern void dmac_clean_range(const void *, const void *);
extern void dmac_flush_range(const void *, const void *);

#endif
diff --git a/arch/arm/include/asm/mach/map.h b/arch/arm/include/asm/mach/map.h
index 2fe141f..07dd055 100644
--- a/arch/arm/include/asm/mach/map.h
+++ b/arch/arm/include/asm/mach/map.h
@@ -54,6 +54,9 @@ extern const struct mem_type *get_mem_type(unsigned int type);
*/
extern int ioremap_page(unsigned long virt, unsigned long phys,
const struct mem_type *mtype);
+
+extern int ioremap_pages(unsigned long virt, unsigned long phys,
+ unsigned long size, const struct mem_type *mtype);
#else
#define iotable_init(map,num) do { } while (0)
#define vm_reserve_area_early(a,s,c) do { } while (0)
diff --git a/arch/arm/mach-msm/Makefile b/arch/arm/mach-msm/Makefile
index d257ff4..33bb7cb 100644
--- a/arch/arm/mach-msm/Makefile
+++ b/arch/arm/mach-msm/Makefile
@@ -1,5 +1,6 @@
obj-y += io.o timer.o
obj-y += clock.o
+obj-y += memory.o

obj-$(CONFIG_MSM_VIC) += irq-vic.o
obj-$(CONFIG_MSM_IOMMU) += devices-iommu.o
diff --git a/arch/arm/mach-msm/include/mach/memory.h b/arch/arm/mach-msm/include/mach/memory.h
new file mode 100644
index 0000000..fa24f7e
--- /dev/null
+++ b/arch/arm/mach-msm/include/mach/memory.h
@@ -0,0 +1,139 @@
+/* arch/arm/mach-msm/include/mach/memory.h
+ *
+ * Copyright (C) 2007 Google, Inc.
+ * Copyright (c) 2009-2012, Code Aurora Forum. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+#include <linux/types.h>
+
+/* physical offset of RAM */
+#define PLAT_PHYS_OFFSET UL(CONFIG_PHYS_OFFSET)
+
+#define MAX_PHYSMEM_BITS 32
+#define SECTION_SIZE_BITS 28
+
+/* Maximum number of Memory Regions
+* The largest system can have 4 memory banks, each divided into 8 regions
+*/
+#define MAX_NR_REGIONS 32
+
+/* The number of regions each memory bank is divided into */
+#define NR_REGIONS_PER_BANK 8
+
+/* Certain configurations of MSM7x30 have multiple memory banks.
+* One or more of these banks can contain holes in the memory map as well.
+* These macros define appropriate conversion routines between the physical
+* and virtual address domains for supporting these configurations using
+* SPARSEMEM and a 3G/1G VM split.
+*/
+
+#if defined(CONFIG_ARCH_MSM7X30)
+
+#define EBI0_PHYS_OFFSET PHYS_OFFSET
+#define EBI0_PAGE_OFFSET PAGE_OFFSET
+#define EBI0_SIZE 0x10000000
+
+#ifndef __ASSEMBLY__
+
+extern unsigned long ebi1_phys_offset;
+
+#define EBI1_PHYS_OFFSET (ebi1_phys_offset)
+#define EBI1_PAGE_OFFSET (EBI0_PAGE_OFFSET + EBI0_SIZE)
+
+#if (defined(CONFIG_SPARSEMEM) && defined(CONFIG_VMSPLIT_3G))
+
+#define __phys_to_virt(phys) \
+ ((phys) >= EBI1_PHYS_OFFSET ? \
+ (phys) - EBI1_PHYS_OFFSET + EBI1_PAGE_OFFSET : \
+ (phys) - EBI0_PHYS_OFFSET + EBI0_PAGE_OFFSET)
+
+#define __virt_to_phys(virt) \
+ ((virt) >= EBI1_PAGE_OFFSET ? \
+ (virt) - EBI1_PAGE_OFFSET + EBI1_PHYS_OFFSET : \
+ (virt) - EBI0_PAGE_OFFSET + EBI0_PHYS_OFFSET)
+
+#endif
+#endif
+
+#endif
+
+#ifndef __ASSEMBLY__
+void *alloc_bootmem_aligned(unsigned long size, unsigned long alignment);
+void *allocate_contiguous_ebi(unsigned long, unsigned long, int);
+unsigned long allocate_contiguous_ebi_nomap(unsigned long, unsigned long);
+void clean_and_invalidate_caches(unsigned long, unsigned long, unsigned long);
+void clean_caches(unsigned long, unsigned long, unsigned long);
+void invalidate_caches(unsigned long, unsigned long, unsigned long);
+int platform_physical_remove_pages(u64, u64);
+int platform_physical_active_pages(u64, u64);
+int platform_physical_low_power_pages(u64, u64);
+unsigned long get_ddr_size(void);
+
+extern int (*change_memory_power)(u64, u64, int);
+
+#if defined(CONFIG_ARCH_MSM_ARM11) || defined(CONFIG_ARCH_MSM_CORTEX_A5)
+void write_to_strongly_ordered_memory(void);
+void map_page_strongly_ordered(void);
+#endif
+
+#ifdef CONFIG_CACHE_L2X0
+extern void l2x0_cache_sync(void);
+#define finish_arch_switch(prev) do { l2x0_cache_sync(); } while (0)
+#endif
+
+#if defined(CONFIG_ARCH_MSM8X60) || defined(CONFIG_ARCH_MSM8960)
+extern void store_ttbr0(void);
+#define finish_arch_switch(prev) do { store_ttbr0(); } while (0)
+#endif
+
+#ifdef CONFIG_DONT_MAP_HOLE_AFTER_MEMBANK0
+extern unsigned long membank0_size;
+extern unsigned long membank1_start;
+void find_membank0_hole(void);
+
+#define MEMBANK0_PHYS_OFFSET PHYS_OFFSET
+#define MEMBANK0_PAGE_OFFSET PAGE_OFFSET
+
+#define MEMBANK1_PHYS_OFFSET (membank1_start)
+#define MEMBANK1_PAGE_OFFSET (MEMBANK0_PAGE_OFFSET + (membank0_size))
+
+#define __phys_to_virt(phys) \
+ ((MEMBANK1_PHYS_OFFSET && ((phys) >= MEMBANK1_PHYS_OFFSET)) ? \
+ (phys) - MEMBANK1_PHYS_OFFSET + MEMBANK1_PAGE_OFFSET : \
+ (phys) - MEMBANK0_PHYS_OFFSET + MEMBANK0_PAGE_OFFSET)
+
+#define __virt_to_phys(virt) \
+ ((MEMBANK1_PHYS_OFFSET && ((virt) >= MEMBANK1_PAGE_OFFSET)) ? \
+ (virt) - MEMBANK1_PAGE_OFFSET + MEMBANK1_PHYS_OFFSET : \
+ (virt) - MEMBANK0_PAGE_OFFSET + MEMBANK0_PHYS_OFFSET)
+#endif
+
+#endif
+
+#if defined CONFIG_ARCH_MSM_SCORPION || defined CONFIG_ARCH_MSM_KRAIT
+#define arch_has_speculative_dfetch() 1
+#endif
+
+#endif
+
+/* these correspond to values known by the modem */
+#define MEMORY_DEEP_POWERDOWN 0
+#define MEMORY_SELF_REFRESH 1
+#define MEMORY_ACTIVE 2
+
+#define NPA_MEMORY_NODE_NAME "/mem/apps/ddr_dpd"
+
+#ifndef CONFIG_ARCH_MSM7X27
+#define CONSISTENT_DMA_SIZE (SZ_1M * 14)
+#endif
diff --git a/arch/arm/mach-msm/include/mach/msm_memtypes.h b/arch/arm/mach-msm/include/mach/msm_memtypes.h
new file mode 100644
index 0000000..7afb38d
--- /dev/null
+++ b/arch/arm/mach-msm/include/mach/msm_memtypes.h
@@ -0,0 +1,70 @@
+/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+*/
+
+/* The MSM Hardware supports multiple flavors of physical memory.
+ * This file captures hardware specific information of these types.
+*/
+
+#ifndef __ASM_ARCH_MSM_MEMTYPES_H
+#define __ASM_ARCH_MSM_MEMTYPES_H
+
+#include <mach/memory.h>
+#include <linux/init.h>
+
+int __init meminfo_init(unsigned int, unsigned int);
+/* Redundant check to prevent this from being included outside of 7x30 */
+#if defined(CONFIG_ARCH_MSM7X30)
+unsigned int get_num_populated_chipselects(void);
+#endif
+
+unsigned int get_num_memory_banks(void);
+unsigned int get_memory_bank_size(unsigned int);
+unsigned int get_memory_bank_start(unsigned int);
+int soc_change_memory_power(u64, u64, int);
+
+enum {
+ MEMTYPE_NONE = -1,
+ MEMTYPE_SMI_KERNEL = 0,
+ MEMTYPE_SMI,
+ MEMTYPE_EBI0,
+ MEMTYPE_EBI1,
+ MEMTYPE_MAX,
+};
+
+void msm_reserve(void);
+
+#define MEMTYPE_FLAGS_FIXED 0x1
+#define MEMTYPE_FLAGS_1M_ALIGN 0x2
+
+struct memtype_reserve {
+ unsigned long start;
+ unsigned long size;
+ unsigned long limit;
+ int flags;
+};
+
+struct reserve_info {
+ struct memtype_reserve *memtype_reserve_table;
+ void (*calculate_reserve_sizes)(void);
+ void (*reserve_fixed_area)(unsigned long);
+ int (*paddr_to_memtype)(unsigned int);
+ unsigned long low_unstable_address;
+ unsigned long max_unstable_size;
+ unsigned long bank_size;
+ unsigned long fixed_area_start;
+ unsigned long fixed_area_size;
+};
+
+extern struct reserve_info *reserve_info;
+
+unsigned long __init reserve_memory_for_fmem(unsigned long, unsigned long);
+#endif
diff --git a/arch/arm/mach-msm/include/mach/socinfo.h b/arch/arm/mach-msm/include/mach/socinfo.h
new file mode 100644
index 0000000..27babf0
--- /dev/null
+++ b/arch/arm/mach-msm/include/mach/socinfo.h
@@ -0,0 +1,360 @@
+/* Copyright (c) 2009-2012, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _ARCH_ARM_MACH_MSM_SOCINFO_H_
+#define _ARCH_ARM_MACH_MSM_SOCINFO_H_
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/of_fdt.h>
+#include <linux/of.h>
+
+#include <asm/cputype.h>
+#include <asm/mach-types.h>
+/*
+ * SOC version type with major number in the upper 16 bits and minor
+ * number in the lower 16 bits. For example:
+ * 1.0 -> 0x00010000
+ * 2.3 -> 0x00020003
+ */
+#define SOCINFO_VERSION_MAJOR(ver) ((ver & 0xffff0000) >> 16)
+#define SOCINFO_VERSION_MINOR(ver) (ver & 0x0000ffff)
+
+#ifdef CONFIG_OF
+#define early_machine_is_msm8974() \
+ of_flat_dt_is_compatible(of_get_flat_dt_root(), "qcom,msm8974")
+#define machine_is_msm8974() \
+ of_machine_is_compatible("qcom,msm8974")
+#define machine_is_msm8974_sim() \
+ of_machine_is_compatible("qcom,msm8974-sim")
+#define machine_is_msm8974_rumi() \
+ of_machine_is_compatible("qcom,msm8974-rumi")
+#define early_machine_is_msm9625() \
+ of_flat_dt_is_compatible(of_get_flat_dt_root(), "qcom,msm9625")
+#define machine_is_msm9625() \
+ of_machine_is_compatible("qcom,msm9625")
+#else
+#define early_machine_is_msm8974() 0
+#define machine_is_msm8974() 0
+#define machine_is_msm8974_sim() 0
+#define machine_is_msm8974_rumi() 0
+#define early_machine_is_msm9625() 0
+#define machine_is_msm9625() 0
+#endif
+
+#define PLATFORM_SUBTYPE_SGLTE 6
+
+enum msm_cpu {
+ MSM_CPU_UNKNOWN = 0,
+ MSM_CPU_7X01,
+ MSM_CPU_7X25,
+ MSM_CPU_7X27,
+ MSM_CPU_8X50,
+ MSM_CPU_8X50A,
+ MSM_CPU_7X30,
+ MSM_CPU_8X55,
+ MSM_CPU_8X60,
+ MSM_CPU_8960,
+ MSM_CPU_8960AB,
+ MSM_CPU_7X27A,
+ FSM_CPU_9XXX,
+ MSM_CPU_7X25A,
+ MSM_CPU_7X25AA,
+ MSM_CPU_7X25AB,
+ MSM_CPU_8064,
+ MSM_CPU_8064AB,
+ MSM_CPU_8930,
+ MSM_CPU_8930AA,
+ MSM_CPU_7X27AA,
+ MSM_CPU_9615,
+ MSM_CPU_8974,
+ MSM_CPU_8627,
+ MSM_CPU_8625,
+ MSM_CPU_9625
+};
+
+enum pmic_model {
+ PMIC_MODEL_PM8058 = 13,
+ PMIC_MODEL_PM8028 = 14,
+ PMIC_MODEL_PM8901 = 15,
+ PMIC_MODEL_PM8027 = 16,
+ PMIC_MODEL_ISL_9519 = 17,
+ PMIC_MODEL_PM8921 = 18,
+ PMIC_MODEL_PM8018 = 19,
+ PMIC_MODEL_PM8015 = 20,
+ PMIC_MODEL_PM8014 = 21,
+ PMIC_MODEL_PM8821 = 22,
+ PMIC_MODEL_PM8038 = 23,
+ PMIC_MODEL_PM8922 = 24,
+ PMIC_MODEL_PM8917 = 25,
+ PMIC_MODEL_UNKNOWN = 0xFFFFFFFF
+};
+
+enum msm_cpu socinfo_get_msm_cpu(void);
+uint32_t socinfo_get_id(void);
+uint32_t socinfo_get_version(void);
+uint32_t socinfo_get_raw_id(void);
+char *socinfo_get_build_id(void);
+uint32_t socinfo_get_platform_type(void);
+uint32_t socinfo_get_platform_subtype(void);
+uint32_t socinfo_get_platform_version(void);
+enum pmic_model socinfo_get_pmic_model(void);
+uint32_t socinfo_get_pmic_die_revision(void);
+int __init socinfo_init(void) __must_check;
+const int read_msm_cpu_type(void);
+const int get_core_count(void);
+const int cpu_is_krait_v1(void);
+
+static inline int cpu_is_msm7x01(void)
+{
+#ifdef CONFIG_ARCH_MSM7X01A
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_7X01;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm7x25(void)
+{
+#ifdef CONFIG_ARCH_MSM7X25
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_7X25;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm7x27(void)
+{
+#if defined(CONFIG_ARCH_MSM7X27) && !defined(CONFIG_ARCH_MSM7X27A)
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_7X27;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm7x27a(void)
+{
+#ifdef CONFIG_ARCH_MSM7X27A
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_7X27A;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm7x27aa(void)
+{
+#ifdef CONFIG_ARCH_MSM7X27A
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_7X27AA;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm7x25a(void)
+{
+#ifdef CONFIG_ARCH_MSM7X27A
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_7X25A;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm7x25aa(void)
+{
+#ifdef CONFIG_ARCH_MSM7X27A
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_7X25AA;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm7x25ab(void)
+{
+#ifdef CONFIG_ARCH_MSM7X27A
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_7X25AB;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm7x30(void)
+{
+#ifdef CONFIG_ARCH_MSM7X30
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_7X30;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_qsd8x50(void)
+{
+#ifdef CONFIG_ARCH_QSD8X50
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_8X50;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm8x55(void)
+{
+#ifdef CONFIG_ARCH_MSM7X30
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_8X55;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm8x60(void)
+{
+#ifdef CONFIG_ARCH_MSM8X60
+ return read_msm_cpu_type() == MSM_CPU_8X60;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm8960(void)
+{
+#ifdef CONFIG_ARCH_MSM8960
+ return read_msm_cpu_type() == MSM_CPU_8960;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm8960ab(void)
+{
+#ifdef CONFIG_ARCH_MSM8960
+ return read_msm_cpu_type() == MSM_CPU_8960AB;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_apq8064(void)
+{
+#ifdef CONFIG_ARCH_APQ8064
+ return read_msm_cpu_type() == MSM_CPU_8064;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_apq8064ab(void)
+{
+#ifdef CONFIG_ARCH_APQ8064
+ return read_msm_cpu_type() == MSM_CPU_8064AB;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm8930(void)
+{
+#ifdef CONFIG_ARCH_MSM8930
+ return read_msm_cpu_type() == MSM_CPU_8930;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm8930aa(void)
+{
+#ifdef CONFIG_ARCH_MSM8930
+ return read_msm_cpu_type() == MSM_CPU_8930AA;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm8627(void)
+{
+/* 8930 and 8627 will share the same CONFIG_ARCH type unless otherwise needed */
+#ifdef CONFIG_ARCH_MSM8930
+ return read_msm_cpu_type() == MSM_CPU_8627;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_fsm9xxx(void)
+{
+#ifdef CONFIG_ARCH_FSM9XXX
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == FSM_CPU_9XXX;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm9615(void)
+{
+#ifdef CONFIG_ARCH_MSM9615
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_9615;
+#else
+ return 0;
+#endif
+}
+
+static inline int cpu_is_msm8625(void)
+{
+#ifdef CONFIG_ARCH_MSM8625
+ enum msm_cpu cpu = socinfo_get_msm_cpu();
+
+ BUG_ON(cpu == MSM_CPU_UNKNOWN);
+ return cpu == MSM_CPU_8625;
+#else
+ return 0;
+#endif
+}
+
+#endif
diff --git a/arch/arm/mach-msm/memory.c b/arch/arm/mach-msm/memory.c
new file mode 100644
index 0000000..1429b8a
--- /dev/null
+++ b/arch/arm/mach-msm/memory.c
@@ -0,0 +1,452 @@
+/* arch/arm/mach-msm/memory.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ * Copyright (c) 2009-2012, Code Aurora Forum. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/mm.h>
+#include <linux/mm_types.h>
+#include <linux/bootmem.h>
+#include <linux/module.h>
+#include <linux/memory_alloc.h>
+#include <linux/memblock.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+#include <asm/mach/map.h>
+#include <asm/cacheflush.h>
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <mach/msm_memtypes.h>
+#include <linux/hardirq.h>
+#if defined(CONFIG_MSM_NPA_REMOTE)
+#include "npa_remote.h"
+#include <linux/completion.h>
+#include <linux/err.h>
+#endif
+#include <linux/android_pmem.h>
+#include <mach/msm_iomap.h>
+#include <mach/socinfo.h>
+#include <linux/sched.h>
+
+/* fixme */
+#include <asm/tlbflush.h>
+#include <../../mm/mm.h>
+#include <linux/fmem.h>
+
+void *strongly_ordered_page;
+char strongly_ordered_mem[PAGE_SIZE*2-4];
+
+void map_page_strongly_ordered(void)
+{
+#if defined(CONFIG_ARCH_MSM7X27) && !defined(CONFIG_ARCH_MSM7X27A)
+ long unsigned int phys;
+ struct map_desc map;
+
+ if (strongly_ordered_page)
+ return;
+
+ strongly_ordered_page = (void*)PFN_ALIGN((int)&strongly_ordered_mem);
+ phys = __pa(strongly_ordered_page);
+
+ map.pfn = __phys_to_pfn(phys);
+ map.virtual = MSM_STRONGLY_ORDERED_PAGE;
+ map.length = PAGE_SIZE;
+ map.type = MT_DEVICE_STRONGLY_ORDERED;
+ create_mapping(&map);
+
+ printk(KERN_ALERT "Initialized strongly ordered page successfully\n");
+#endif
+}
+EXPORT_SYMBOL(map_page_strongly_ordered);
+
+void write_to_strongly_ordered_memory(void)
+{
+#if defined(CONFIG_ARCH_MSM7X27) && !defined(CONFIG_ARCH_MSM7X27A)
+ if (!strongly_ordered_page) {
+ if (!in_interrupt())
+ map_page_strongly_ordered();
+ else {
+ printk(KERN_ALERT "Cannot map strongly ordered page in "
+ "Interrupt Context\n");
+ /* capture it here before the allocation fails later */
+ BUG();
+ }
+ }
+ *(int *)MSM_STRONGLY_ORDERED_PAGE = 0;
+#endif
+}
+EXPORT_SYMBOL(write_to_strongly_ordered_memory);
+
+/* These cache related routines make the assumption (if outer cache is
+ * available) that the associated physical memory is contiguous.
+ * They will operate on all (L1 and L2 if present) caches.
+ */
+void clean_and_invalidate_caches(unsigned long vstart,
+ unsigned long length, unsigned long pstart)
+{
+ dmac_flush_range((void *)vstart, (void *) (vstart + length));
+ outer_flush_range(pstart, pstart + length);
+}
+
+void clean_caches(unsigned long vstart,
+ unsigned long length, unsigned long pstart)
+{
+ dmac_clean_range((void *)vstart, (void *) (vstart + length));
+ outer_clean_range(pstart, pstart + length);
+}
+
+void invalidate_caches(unsigned long vstart,
+ unsigned long length, unsigned long pstart)
+{
+ dmac_inv_range((void *)vstart, (void *) (vstart + length));
+ outer_inv_range(pstart, pstart + length);
+}
+
+void * __init alloc_bootmem_aligned(unsigned long size, unsigned long alignment)
+{
+ void *unused_addr = NULL;
+ unsigned long addr, tmp_size, unused_size;
+
+ /* Allocate maximum size needed, see where it ends up.
+ * Then free it -- in this path there are no other allocators
+ * so we can depend on getting the same address back
+ * when we allocate a smaller piece that is aligned
+ * at the end (if necessary) and the piece we really want,
+ * then free the unused first piece.
+ */
+
+ tmp_size = size + alignment - PAGE_SIZE;
+ addr = (unsigned long)alloc_bootmem(tmp_size);
+ free_bootmem(__pa(addr), tmp_size);
+
+ unused_size = alignment - (addr % alignment);
+ if (unused_size)
+ unused_addr = alloc_bootmem(unused_size);
+
+ addr = (unsigned long)alloc_bootmem(size);
+ if (unused_size)
+ free_bootmem(__pa(unused_addr), unused_size);
+
+ return (void *)addr;
+}
+
+int (*change_memory_power)(u64, u64, int);
+
+int platform_physical_remove_pages(u64 start, u64 size)
+{
+ if (!change_memory_power)
+ return 0;
+ return change_memory_power(start, size, MEMORY_DEEP_POWERDOWN);
+}
+
+int platform_physical_active_pages(u64 start, u64 size)
+{
+ if (!change_memory_power)
+ return 0;
+ return change_memory_power(start, size, MEMORY_ACTIVE);
+}
+
+int platform_physical_low_power_pages(u64 start, u64 size)
+{
+ if (!change_memory_power)
+ return 0;
+ return change_memory_power(start, size, MEMORY_SELF_REFRESH);
+}
+
+char *memtype_name[] = {
+ "SMI_KERNEL",
+ "SMI",
+ "EBI0",
+ "EBI1"
+};
+
+struct reserve_info *reserve_info;
+
+static unsigned long stable_size(struct membank *mb,
+ unsigned long unstable_limit)
+{
+ unsigned long upper_limit = mb->start + mb->size;
+
+ if (!unstable_limit)
+ return mb->size;
+
+ /* Check for 32 bit roll-over */
+ if (upper_limit >= mb->start) {
+ /* If we didn't roll over we can safely make the check below */
+ if (upper_limit <= unstable_limit)
+ return mb->size;
+ }
+
+ if (mb->start >= unstable_limit)
+ return 0;
+ return unstable_limit - mb->start;
+}
+
+/* stable size of all memory banks contiguous to and below this one */
+static unsigned long total_stable_size(unsigned long bank)
+{
+ int i;
+ struct membank *mb = &meminfo.bank[bank];
+ int memtype = reserve_info->paddr_to_memtype(mb->start);
+ unsigned long size;
+
+ size = stable_size(mb, reserve_info->low_unstable_address);
+ for (i = bank - 1, mb = &meminfo.bank[bank - 1]; i >= 0; i--, mb--) {
+ if (mb->start + mb->size != (mb + 1)->start)
+ break;
+ if (reserve_info->paddr_to_memtype(mb->start) != memtype)
+ break;
+ size += stable_size(mb, reserve_info->low_unstable_address);
+ }
+ return size;
+}
+
+static void __init calculate_reserve_limits(void)
+{
+ int i;
+ struct membank *mb;
+ int memtype;
+ struct memtype_reserve *mt;
+ unsigned long size;
+
+ for (i = 0, mb = &meminfo.bank[0]; i < meminfo.nr_banks; i++, mb++) {
+ memtype = reserve_info->paddr_to_memtype(mb->start);
+ if (memtype == MEMTYPE_NONE) {
+ pr_warning("unknown memory type for bank at %lx\n",
+ (long unsigned int)mb->start);
+ continue;
+ }
+ mt = &reserve_info->memtype_reserve_table[memtype];
+ size = total_stable_size(i);
+ mt->limit = max(mt->limit, size);
+ }
+}
+
+static void __init adjust_reserve_sizes(void)
+{
+ int i;
+ struct memtype_reserve *mt;
+
+ mt = &reserve_info->memtype_reserve_table[0];
+ for (i = 0; i < MEMTYPE_MAX; i++, mt++) {
+ if (mt->flags & MEMTYPE_FLAGS_1M_ALIGN)
+ mt->size = (mt->size + SECTION_SIZE - 1) & SECTION_MASK;
+ if (mt->size > mt->limit) {
+ pr_warning("%lx size for %s too large, setting to %lx\n",
+ mt->size, memtype_name[i], mt->limit);
+ mt->size = mt->limit;
+ }
+ }
+}
+
+static void __init reserve_memory_for_mempools(void)
+{
+ int i, memtype, membank_type;
+ struct memtype_reserve *mt;
+ struct membank *mb;
+ int ret;
+ unsigned long size;
+
+ mt = &reserve_info->memtype_reserve_table[0];
+ for (memtype = 0; memtype < MEMTYPE_MAX; memtype++, mt++) {
+ if (mt->flags & MEMTYPE_FLAGS_FIXED || !mt->size)
+ continue;
+
+ /* We know we will find memory bank(s) of the proper size
+ * as we have limited the size of the memory pool for
+ * each memory type to the largest total size of the memory
+ * banks which are contiguous and of the correct memory type.
+ * Choose the memory bank with the highest physical
+ * address which is large enough, so that we will not
+ * take memory from the lowest memory bank which the kernel
+ * is in (and cause boot problems) and so that we might
+ * be able to steal memory that would otherwise become
+ * highmem. However, do not use unstable memory.
+ */
+ for (i = meminfo.nr_banks - 1; i >= 0; i--) {
+ mb = &meminfo.bank[i];
+ membank_type =
+ reserve_info->paddr_to_memtype(mb->start);
+ if (memtype != membank_type)
+ continue;
+ size = total_stable_size(i);
+ if (size >= mt->size) {
+ size = stable_size(mb,
+ reserve_info->low_unstable_address);
+ if (!size)
+ continue;
+ /* mt->size may be larger than size, all this
+ * means is that we are carving the memory pool
+ * out of multiple contiguous memory banks.
+ */
+ mt->start = mb->start + (size - mt->size);
+ ret = memblock_remove(mt->start, mt->size);
+ BUG_ON(ret);
+ break;
+ }
+ }
+ }
+}
+
+static void __init initialize_mempools(void)
+{
+ struct mem_pool *mpool;
+ int memtype;
+ struct memtype_reserve *mt;
+
+ mt = &reserve_info->memtype_reserve_table[0];
+ for (memtype = 0; memtype < MEMTYPE_MAX; memtype++, mt++) {
+ if (!mt->size)
+ continue;
+ mpool = initialize_memory_pool(mt->start, mt->size, memtype);
+ if (!mpool)
+ pr_warning("failed to create %s mempool\n",
+ memtype_name[memtype]);
+ }
+}
+
+#define MAX_FIXED_AREA_SIZE 0x11000000
+
+void __init msm_reserve(void)
+{
+ unsigned long msm_fixed_area_size;
+ unsigned long msm_fixed_area_start;
+
+ memory_pool_init();
+ reserve_info->calculate_reserve_sizes();
+
+ msm_fixed_area_size = reserve_info->fixed_area_size;
+ msm_fixed_area_start = reserve_info->fixed_area_start;
+ if (msm_fixed_area_size)
+ if (msm_fixed_area_start > reserve_info->low_unstable_address
+ - MAX_FIXED_AREA_SIZE)
+ reserve_info->low_unstable_address =
+ msm_fixed_area_start;
+
+ calculate_reserve_limits();
+ adjust_reserve_sizes();
+ reserve_memory_for_mempools();
+ initialize_mempools();
+}
+
+static int get_ebi_memtype(void)
+{
+ /* on 7x30 and 8x55 "EBI1 kernel PMEM" is really on EBI0 */
+ if (cpu_is_msm7x30() || cpu_is_msm8x55())
+ return MEMTYPE_EBI0;
+ return MEMTYPE_EBI1;
+}
+
+void *allocate_contiguous_ebi(unsigned long size,
+ unsigned long align, int cached)
+{
+ return allocate_contiguous_memory(size, get_ebi_memtype(),
+ align, cached);
+}
+EXPORT_SYMBOL(allocate_contiguous_ebi);
+
+unsigned long allocate_contiguous_ebi_nomap(unsigned long size,
+ unsigned long align)
+{
+ return _allocate_contiguous_memory_nomap(size, get_ebi_memtype(),
+ align, __builtin_return_address(0));
+}
+EXPORT_SYMBOL(allocate_contiguous_ebi_nomap);
+
+/* emulation of the deprecated pmem_kalloc and pmem_kfree */
+int32_t pmem_kalloc(const size_t size, const uint32_t flags)
+{
+ int pmem_memtype;
+ int memtype = MEMTYPE_NONE;
+ int ebi1_memtype = MEMTYPE_EBI1;
+ unsigned int align;
+ int32_t paddr;
+
+ switch (flags & PMEM_ALIGNMENT_MASK) {
+ case PMEM_ALIGNMENT_4K:
+ align = SZ_4K;
+ break;
+ case PMEM_ALIGNMENT_1M:
+ align = SZ_1M;
+ break;
+ default:
+ pr_alert("Invalid alignment %x\n",
+ (flags & PMEM_ALIGNMENT_MASK));
+ return -EINVAL;
+ }
+
+ /* on 7x30 and 8x55 "EBI1 kernel PMEM" is really on EBI0 */
+ if (cpu_is_msm7x30() || cpu_is_msm8x55())
+ ebi1_memtype = MEMTYPE_EBI0;
+
+ pmem_memtype = flags & PMEM_MEMTYPE_MASK;
+ if (pmem_memtype == PMEM_MEMTYPE_EBI1)
+ memtype = ebi1_memtype;
+ else if (pmem_memtype == PMEM_MEMTYPE_SMI)
+ memtype = MEMTYPE_SMI_KERNEL;
+ else {
+ pr_alert("Invalid memory type %x\n",
+ flags & PMEM_MEMTYPE_MASK);
+ return -EINVAL;
+ }
+
+ paddr = _allocate_contiguous_memory_nomap(size, memtype, align,
+ __builtin_return_address(0));
+
+ if (!paddr && pmem_memtype == PMEM_MEMTYPE_SMI)
+ paddr = _allocate_contiguous_memory_nomap(size,
+ ebi1_memtype, align, __builtin_return_address(0));
+
+ if (!paddr)
+ return -ENOMEM;
+ return paddr;
+}
+EXPORT_SYMBOL(pmem_kalloc);
+
+int pmem_kfree(const int32_t physaddr)
+{
+ free_contiguous_memory_by_paddr(physaddr);
+
+ return 0;
+}
+EXPORT_SYMBOL(pmem_kfree);
+
+unsigned int msm_ttbr0;
+
+void store_ttbr0(void)
+{
+ /* Store TTBR0 for post-mortem debugging purposes. */
+ asm("mrc p15, 0, %0, c2, c0, 0\n"
+ : "=r" (msm_ttbr0));
+}
+
+int request_fmem_c_region(void *unused)
+{
+ return fmem_set_state(FMEM_C_STATE);
+}
+
+int release_fmem_c_region(void *unused)
+{
+ return fmem_set_state(FMEM_T_STATE);
+}
+
+unsigned long get_ddr_size(void)
+{
+ unsigned int i;
+ unsigned long ret = 0;
+
+ for (i = 0; i < meminfo.nr_banks; i++)
+ ret += meminfo.bank[i].size;
+
+ return ret;
+}
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 8dacd4c..5e0a710 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -51,6 +51,10 @@ config AD525X_DPOT_SPI
To compile this driver as a module, choose M here: the
module will be called ad525x_dpot-spi.

+config ANDROID_PMEM
+ bool "Android pmem allocator"
+ default y
+
config ATMEL_PWM
tristate "Atmel AT32/AT91 PWM support"
depends on HAVE_CLK
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index c235d5b..61bf50b 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_PHANTOM) += phantom.o
obj-$(CONFIG_SENSORS_BH1780) += bh1780gli.o
obj-$(CONFIG_SENSORS_BH1770) += bh1770glc.o
obj-$(CONFIG_SENSORS_APDS990X) += apds990x.o
+obj-$(CONFIG_ANDROID_PMEM) += pmem.o
obj-$(CONFIG_SGI_IOC4) += ioc4.o
obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
obj-$(CONFIG_KGDB_TESTS) += kgdbts.o
diff --git a/drivers/misc/pmem.c b/drivers/misc/pmem.c
new file mode 100644
index 0000000..7431a59
--- /dev/null
+++ b/drivers/misc/pmem.c
@@ -0,0 +1,2962 @@
+/* drivers/android/pmem.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ * Copyright (c) 2009-2012, Code Aurora Forum. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/export.h>
+#include <linux/miscdevice.h>
+#include <linux/platform_device.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/fmem.h>
+#include <linux/mm.h>
+#include <linux/list.h>
+#include <linux/debugfs.h>
+#include <linux/android_pmem.h>
+#include <linux/mempolicy.h>
+#include <linux/sched.h>
+#include <linux/kobject.h>
+#include <linux/pm_runtime.h>
+#include <linux/memory_alloc.h>
+#include <linux/vmalloc.h>
+#include <linux/io.h>
+#include <linux/mm_types.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/cacheflush.h>
+#include <asm/sizes.h>
+#include <asm/mach/map.h>
+#include <asm/page.h>
+#include "../../arch/arm/mach-msm/memory.c"
+
+#define PMEM_MAX_DEVICES (10)
+
+#define PMEM_MAX_ORDER (128)
+#define PMEM_MIN_ALLOC PAGE_SIZE
+
+#define PMEM_INITIAL_NUM_BITMAP_ALLOCATIONS (64)
+
+#define PMEM_32BIT_WORD_ORDER (5)
+#define PMEM_BITS_PER_WORD_MASK (BITS_PER_LONG - 1)
+
+#ifdef CONFIG_ANDROID_PMEM_DEBUG
+#define PMEM_DEBUG 1
+#else
+#define PMEM_DEBUG 0
+#endif
+
+#define SYSTEM_ALLOC_RETRY 10
+
+/* indicates that a refernce to this file has been taken via get_pmem_file,
+ * the file should not be released until put_pmem_file is called */
+#define PMEM_FLAGS_BUSY 0x1
+/* indicates that this is a suballocation of a larger master range */
+#define PMEM_FLAGS_CONNECTED 0x1 << 1
+/* indicates this is a master and not a sub allocation and that it is mmaped */
+#define PMEM_FLAGS_MASTERMAP 0x1 << 2
+/* submap and unsubmap flags indicate:
+ * 00: subregion has never been mmaped
+ * 10: subregion has been mmaped, reference to the mm was taken
+ * 11: subretion has ben released, refernece to the mm still held
+ * 01: subretion has been released, reference to the mm has been released
+ */
+#define PMEM_FLAGS_SUBMAP 0x1 << 3
+#define PMEM_FLAGS_UNSUBMAP 0x1 << 4
+
+struct pmem_data {
+ /* in alloc mode: an index into the bitmap
+ * in no_alloc mode: the size of the allocation */
+ int index;
+ /* see flags above for descriptions */
+ unsigned int flags;
+ /* protects this data field, if the mm_mmap sem will be held at the
+ * same time as this sem, the mm sem must be taken first (as this is
+ * the order for vma_open and vma_close ops */
+ struct rw_semaphore sem;
+ /* info about the mmaping process */
+ struct vm_area_struct *vma;
+ /* task struct of the mapping process */
+ struct task_struct *task;
+ /* process id of teh mapping process */
+ pid_t pid;
+ /* file descriptor of the master */
+ int master_fd;
+ /* file struct of the master */
+ struct file *master_file;
+ /* a list of currently available regions if this is a suballocation */
+ struct list_head region_list;
+ /* a linked list of data so we can access them for debugging */
+ struct list_head list;
+#if PMEM_DEBUG
+ int ref;
+#endif
+};
+
+struct pmem_bits {
+ unsigned allocated:1; /* 1 if allocated, 0 if free */
+ unsigned order:7; /* size of the region in pmem space */
+};
+
+struct pmem_region_node {
+ struct pmem_region region;
+ struct list_head list;
+};
+
+#define PMEM_DEBUG_MSGS 0
+#if PMEM_DEBUG_MSGS
+#define DLOG(fmt,args...) \
+ do { pr_debug("[%s:%s:%d] "fmt, __FILE__, __func__, __LINE__, \
+ ##args); } \
+ while (0)
+#else
+#define DLOG(x...) do {} while (0)
+#endif
+
+enum pmem_align {
+ PMEM_ALIGN_4K,
+ PMEM_ALIGN_1M,
+};
+
+#define PMEM_NAME_SIZE 16
+
+struct alloc_list {
+ void *addr; /* physical addr of allocation */
+ void *aaddr; /* aligned physical addr */
+ unsigned int size; /* total size of allocation */
+ unsigned char __iomem *vaddr; /* Virtual addr */
+ struct list_head allocs;
+};
+
+struct pmem_info {
+ struct miscdevice dev;
+ /* physical start address of the remaped pmem space */
+ unsigned long base;
+ /* vitual start address of the remaped pmem space */
+ unsigned char __iomem *vbase;
+ /* total size of the pmem space */
+ unsigned long size;
+ /* number of entries in the pmem space */
+ unsigned long num_entries;
+ /* pfn of the garbage page in memory */
+ unsigned long garbage_pfn;
+ /* which memory type (i.e. SMI, EBI1) this PMEM device is backed by */
+ unsigned memory_type;
+
+ char name[PMEM_NAME_SIZE];
+
+ /* index of the garbage page in the pmem space */
+ int garbage_index;
+ /* reserved virtual address range */
+ struct vm_struct *area;
+
+ enum pmem_allocator_type allocator_type;
+
+ int (*allocate)(const int,
+ const unsigned long,
+ const unsigned int);
+ int (*free)(int, int);
+ int (*free_space)(int, struct pmem_freespace *);
+ unsigned long (*len)(int, struct pmem_data *);
+ unsigned long (*start_addr)(int, struct pmem_data *);
+
+ /* actual size of memory element, e.g.: (4 << 10) is 4K */
+ unsigned int quantum;
+
+ /* indicates maps of this region should be cached, if a mix of
+ * cached and uncached is desired, set this and open the device with
+ * O_SYNC to get an uncached region */
+ unsigned cached;
+ unsigned buffered;
+ union {
+ struct {
+ /* in all_or_nothing allocator mode the first mapper
+ * gets the whole space and sets this flag */
+ unsigned allocated;
+ } all_or_nothing;
+
+ struct {
+ /* the buddy allocator bitmap for the region
+ * indicating which entries are allocated and which
+ * are free.
+ */
+
+ struct pmem_bits *buddy_bitmap;
+ } buddy_bestfit;
+
+ struct {
+ unsigned int bitmap_free; /* # of zero bits/quanta */
+ uint32_t *bitmap;
+ int32_t bitmap_allocs;
+ struct {
+ short bit;
+ unsigned short quanta;
+ } *bitm_alloc;
+ } bitmap;
+
+ struct {
+ unsigned long used; /* Bytes currently allocated */
+ struct list_head alist; /* List of allocations */
+ } system_mem;
+ } allocator;
+
+ int id;
+ struct kobject kobj;
+
+ /* for debugging, creates a list of pmem file structs, the
+ * data_list_mutex should be taken before pmem_data->sem if both are
+ * needed */
+ struct mutex data_list_mutex;
+ struct list_head data_list;
+ /* arena_mutex protects the global allocation arena
+ *
+ * IF YOU TAKE BOTH LOCKS TAKE THEM IN THIS ORDER:
+ * down(pmem_data->sem) => mutex_lock(arena_mutex)
+ */
+ struct mutex arena_mutex;
+
+ long (*ioctl)(struct file *, unsigned int, unsigned long);
+ int (*release)(struct inode *, struct file *);
+ /* reference count of allocations */
+ atomic_t allocation_cnt;
+ /*
+ * request function for a region when the allocation count goes
+ * from 0 -> 1
+ */
+ int (*mem_request)(void *);
+ /*
+ * release function for a region when the allocation count goes
+ * from 1 -> 0
+ */
+ int (*mem_release)(void *);
+ /*
+ * private data for the request/release callback
+ */
+ void *region_data;
+ /*
+ * map and unmap as needed
+ */
+ int map_on_demand;
+ /*
+ * memory will be reused through fmem
+ */
+ int reusable;
+};
+#define to_pmem_info_id(a) (container_of(a, struct pmem_info, kobj)->id)
+
+static void ioremap_pmem(int id);
+static void pmem_put_region(int id);
+static int pmem_get_region(int id);
+
+static struct pmem_info pmem[PMEM_MAX_DEVICES];
+static int id_count;
+
+#define PMEM_SYSFS_DIR_NAME "pmem_regions" /* under /sys/kernel/ */
+static struct kset *pmem_kset;
+
+#define PMEM_IS_FREE_BUDDY(id, index) \
+ (!(pmem[id].allocator.buddy_bestfit.buddy_bitmap[index].allocated))
+#define PMEM_BUDDY_ORDER(id, index) \
+ (pmem[id].allocator.buddy_bestfit.buddy_bitmap[index].order)
+#define PMEM_BUDDY_INDEX(id, index) \
+ (index ^ (1 << PMEM_BUDDY_ORDER(id, index)))
+#define PMEM_BUDDY_NEXT_INDEX(id, index) \
+ (index + (1 << PMEM_BUDDY_ORDER(id, index)))
+#define PMEM_OFFSET(index) (index * pmem[id].quantum)
+#define PMEM_START_ADDR(id, index) \
+ (PMEM_OFFSET(index) + pmem[id].base)
+#define PMEM_BUDDY_LEN(id, index) \
+ ((1 << PMEM_BUDDY_ORDER(id, index)) * pmem[id].quantum)
+#define PMEM_END_ADDR(id, index) \
+ (PMEM_START_ADDR(id, index) + PMEM_LEN(id, index))
+#define PMEM_START_VADDR(id, index) \
+ (PMEM_OFFSET(id, index) + pmem[id].vbase)
+#define PMEM_END_VADDR(id, index) \
+ (PMEM_START_VADDR(id, index) + PMEM_LEN(id, index))
+#define PMEM_REVOKED(data) (data->flags & PMEM_FLAGS_REVOKED)
+#define PMEM_IS_PAGE_ALIGNED(addr) (!((addr) & (~PAGE_MASK)))
+#define PMEM_IS_SUBMAP(data) \
+ ((data->flags & PMEM_FLAGS_SUBMAP) && \
+ (!(data->flags & PMEM_FLAGS_UNSUBMAP)))
+
+static int pmem_release(struct inode *, struct file *);
+static int pmem_mmap(struct file *, struct vm_area_struct *);
+static int pmem_open(struct inode *, struct file *);
+static long pmem_ioctl(struct file *, unsigned int, unsigned long);
+
+struct file_operations pmem_fops = {
+ .release = pmem_release,
+ .mmap = pmem_mmap,
+ .open = pmem_open,
+ .unlocked_ioctl = pmem_ioctl,
+};
+
+#define PMEM_ATTR(_name, _mode, _show, _store) { \
+ .attr = {.name = __stringify(_name), .mode = _mode }, \
+ .show = _show, \
+ .store = _store, \
+}
+
+struct pmem_attr {
+ struct attribute attr;
+ ssize_t(*show) (const int id, char * const);
+ ssize_t(*store) (const int id, const char * const, const size_t count);
+};
+#define to_pmem_attr(a) container_of(a, struct pmem_attr, attr)
+
+#define RW_PMEM_ATTR(name) \
+static struct pmem_attr pmem_attr_## name = \
+ PMEM_ATTR(name, S_IRUGO | S_IWUSR, show_pmem_## name, store_pmem_## name)
+
+#define RO_PMEM_ATTR(name) \
+static struct pmem_attr pmem_attr_## name = \
+ PMEM_ATTR(name, S_IRUGO, show_pmem_## name, NULL)
+
+#define WO_PMEM_ATTR(name) \
+static struct pmem_attr pmem_attr_## name = \
+ PMEM_ATTR(name, S_IWUSR, NULL, store_pmem_## name)
+
+static ssize_t show_pmem(struct kobject *kobj,
+ struct attribute *attr,
+ char *buf)
+{
+ struct pmem_attr *a = to_pmem_attr(attr);
+ return a->show ? a->show(to_pmem_info_id(kobj), buf) : -EIO;
+}
+
+static ssize_t store_pmem(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t count)
+{
+ struct pmem_attr *a = to_pmem_attr(attr);
+ return a->store ? a->store(to_pmem_info_id(kobj), buf, count) : -EIO;
+}
+
+static struct sysfs_ops pmem_ops = {
+ .show = show_pmem,
+ .store = store_pmem,
+};
+
+static ssize_t show_pmem_base(int id, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%lu(%#lx)\n",
+ pmem[id].base, pmem[id].base);
+}
+RO_PMEM_ATTR(base);
+
+static ssize_t show_pmem_size(int id, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%lu(%#lx)\n",
+ pmem[id].size, pmem[id].size);
+}
+RO_PMEM_ATTR(size);
+
+static ssize_t show_pmem_allocator_type(int id, char *buf)
+{
+ switch (pmem[id].allocator_type) {
+ case PMEM_ALLOCATORTYPE_ALLORNOTHING:
+ return scnprintf(buf, PAGE_SIZE, "%s\n", "All or Nothing");
+ case PMEM_ALLOCATORTYPE_BUDDYBESTFIT:
+ return scnprintf(buf, PAGE_SIZE, "%s\n", "Buddy Bestfit");
+ case PMEM_ALLOCATORTYPE_BITMAP:
+ return scnprintf(buf, PAGE_SIZE, "%s\n", "Bitmap");
+ case PMEM_ALLOCATORTYPE_SYSTEM:
+ return scnprintf(buf, PAGE_SIZE, "%s\n", "System heap");
+ default:
+ return scnprintf(buf, PAGE_SIZE,
+ "??? Invalid allocator type (%d) for this region! "
+ "Something isn't right.\n",
+ pmem[id].allocator_type);
+ }
+}
+RO_PMEM_ATTR(allocator_type);
+
+static ssize_t show_pmem_mapped_regions(int id, char *buf)
+{
+ struct list_head *elt;
+ int ret;
+
+ ret = scnprintf(buf, PAGE_SIZE,
+ "pid #: mapped regions (offset, len) (offset,len)...\n");
+
+ mutex_lock(&pmem[id].data_list_mutex);
+ list_for_each(elt, &pmem[id].data_list) {
+ struct pmem_data *data =
+ list_entry(elt, struct pmem_data, list);
+ struct list_head *elt2;
+
+ down_read(&data->sem);
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret, "pid %u:",
+ data->pid);
+ list_for_each(elt2, &data->region_list) {
+ struct pmem_region_node *region_node = list_entry(elt2,
+ struct pmem_region_node,
+ list);
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
+ "(%lx,%lx) ",
+ region_node->region.offset,
+ region_node->region.len);
+ }
+ up_read(&data->sem);
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");
+ }
+ mutex_unlock(&pmem[id].data_list_mutex);
+ return ret;
+}
+RO_PMEM_ATTR(mapped_regions);
+
+#define PMEM_COMMON_SYSFS_ATTRS \
+ &pmem_attr_base.attr, \
+ &pmem_attr_size.attr, \
+ &pmem_attr_allocator_type.attr, \
+ &pmem_attr_mapped_regions.attr
+
+
+static ssize_t show_pmem_allocated(int id, char *buf)
+{
+ ssize_t ret;
+
+ mutex_lock(&pmem[id].arena_mutex);
+ ret = scnprintf(buf, PAGE_SIZE, "%s\n",
+ pmem[id].allocator.all_or_nothing.allocated ?
+ "is allocated" : "is NOT allocated");
+ mutex_unlock(&pmem[id].arena_mutex);
+ return ret;
+}
+RO_PMEM_ATTR(allocated);
+
+static struct attribute *pmem_allornothing_attrs[] = {
+ PMEM_COMMON_SYSFS_ATTRS,
+
+ &pmem_attr_allocated.attr,
+
+ NULL
+};
+
+static struct kobj_type pmem_allornothing_ktype = {
+ .sysfs_ops = &pmem_ops,
+ .default_attrs = pmem_allornothing_attrs,
+};
+
+static ssize_t show_pmem_total_entries(int id, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%lu\n", pmem[id].num_entries);
+}
+RO_PMEM_ATTR(total_entries);
+
+static ssize_t show_pmem_quantum_size(int id, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%u (%#x)\n",
+ pmem[id].quantum, pmem[id].quantum);
+}
+RO_PMEM_ATTR(quantum_size);
+
+static ssize_t show_pmem_buddy_bitmap_dump(int id, char *buf)
+{
+ int ret, i;
+
+ mutex_lock(&pmem[id].data_list_mutex);
+ ret = scnprintf(buf, PAGE_SIZE, "index\torder\tlength\tallocated\n");
+
+ for (i = 0; i < pmem[id].num_entries && (PAGE_SIZE - ret);
+ i = PMEM_BUDDY_NEXT_INDEX(id, i))
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%d\t%d\t%d\t%d\n",
+ i, PMEM_BUDDY_ORDER(id, i),
+ PMEM_BUDDY_LEN(id, i),
+ !PMEM_IS_FREE_BUDDY(id, i));
+
+ mutex_unlock(&pmem[id].data_list_mutex);
+ return ret;
+}
+RO_PMEM_ATTR(buddy_bitmap_dump);
+
+#define PMEM_BITMAP_BUDDY_BESTFIT_COMMON_SYSFS_ATTRS \
+ &pmem_attr_quantum_size.attr, \
+ &pmem_attr_total_entries.attr
+
+static struct attribute *pmem_buddy_bestfit_attrs[] = {
+ PMEM_COMMON_SYSFS_ATTRS,
+
+ PMEM_BITMAP_BUDDY_BESTFIT_COMMON_SYSFS_ATTRS,
+
+ &pmem_attr_buddy_bitmap_dump.attr,
+
+ NULL
+};
+
+static struct kobj_type pmem_buddy_bestfit_ktype = {
+ .sysfs_ops = &pmem_ops,
+ .default_attrs = pmem_buddy_bestfit_attrs,
+};
+
+static ssize_t show_pmem_free_quanta(int id, char *buf)
+{
+ ssize_t ret;
+
+ mutex_lock(&pmem[id].arena_mutex);
+ ret = scnprintf(buf, PAGE_SIZE, "%u\n",
+ pmem[id].allocator.bitmap.bitmap_free);
+ mutex_unlock(&pmem[id].arena_mutex);
+ return ret;
+}
+RO_PMEM_ATTR(free_quanta);
+
+static ssize_t show_pmem_bits_allocated(int id, char *buf)
+{
+ ssize_t ret;
+ unsigned int i;
+
+ mutex_lock(&pmem[id].arena_mutex);
+
+ ret = scnprintf(buf, PAGE_SIZE,
+ "id: %d\nbitnum\tindex\tquanta allocated\n", id);
+
+ for (i = 0; i < pmem[id].allocator.bitmap.bitmap_allocs; i++)
+ if (pmem[id].allocator.bitmap.bitm_alloc[i].bit != -1)
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
+ "%u\t%u\t%u\n",
+ i,
+ pmem[id].allocator.bitmap.bitm_alloc[i].bit,
+ pmem[id].allocator.bitmap.bitm_alloc[i].quanta
+ );
+
+ mutex_unlock(&pmem[id].arena_mutex);
+ return ret;
+}
+RO_PMEM_ATTR(bits_allocated);
+
+static struct attribute *pmem_bitmap_attrs[] = {
+ PMEM_COMMON_SYSFS_ATTRS,
+
+ PMEM_BITMAP_BUDDY_BESTFIT_COMMON_SYSFS_ATTRS,
+
+ &pmem_attr_free_quanta.attr,
+ &pmem_attr_bits_allocated.attr,
+
+ NULL
+};
+
+static struct attribute *pmem_system_attrs[] = {
+ PMEM_COMMON_SYSFS_ATTRS,
+
+ NULL
+};
+
+static struct kobj_type pmem_bitmap_ktype = {
+ .sysfs_ops = &pmem_ops,
+ .default_attrs = pmem_bitmap_attrs,
+};
+
+static struct kobj_type pmem_system_ktype = {
+ .sysfs_ops = &pmem_ops,
+ .default_attrs = pmem_system_attrs,
+};
+
+static int pmem_allocate_from_id(const int id, const unsigned long size,
+ const unsigned int align)
+{
+ int ret;
+ ret = pmem_get_region(id);
+
+ if (ret)
+ return -1;
+
+ ret = pmem[id].allocate(id, size, align);
+
+ if (ret < 0)
+ pmem_put_region(id);
+
+ return ret;
+}
+
+static int pmem_free_from_id(const int id, const int index)
+{
+ pmem_put_region(id);
+ return pmem[id].free(id, index);
+}
+
+static int pmem_get_region(int id)
+{
+ /* Must be called with arena mutex locked */
+ atomic_inc(&pmem[id].allocation_cnt);
+ if (!pmem[id].vbase) {
+ DLOG("PMEMDEBUG: mapping for %s", pmem[id].name);
+ if (pmem[id].mem_request) {
+ int ret = pmem[id].mem_request(pmem[id].region_data);
+ if (ret) {
+ atomic_dec(&pmem[id].allocation_cnt);
+ return 1;
+ }
+ }
+ ioremap_pmem(id);
+ }
+
+ if (pmem[id].vbase) {
+ return 0;
+ } else {
+ if (pmem[id].mem_release)
+ pmem[id].mem_release(pmem[id].region_data);
+ atomic_dec(&pmem[id].allocation_cnt);
+ return 1;
+ }
+}
+
+static void pmem_put_region(int id)
+{
+ /* Must be called with arena mutex locked */
+ if (atomic_dec_and_test(&pmem[id].allocation_cnt)) {
+ DLOG("PMEMDEBUG: unmapping for %s", pmem[id].name);
+ BUG_ON(!pmem[id].vbase);
+ if (pmem[id].map_on_demand) {
+ /* unmap_kernel_range() flushes the caches
+ * and removes the page table entries
+ */
+ unmap_kernel_range((unsigned long)pmem[id].vbase,
+ pmem[id].size);
+ pmem[id].vbase = NULL;
+ if (pmem[id].mem_release) {
+ int ret = pmem[id].mem_release(
+ pmem[id].region_data);
+ WARN(ret, "mem_release failed");
+ }
+
+ }
+ }
+}
+
+static int get_id(struct file *file)
+{
+ return MINOR(file->f_dentry->d_inode->i_rdev);
+}
+
+static char *get_name(struct file *file)
+{
+ int id = get_id(file);
+ return pmem[id].name;
+}
+
+static int is_pmem_file(struct file *file)
+{
+ int id;
+
+ if (unlikely(!file || !file->f_dentry || !file->f_dentry->d_inode))
+ return 0;
+
+ id = get_id(file);
+ return (unlikely(id >= PMEM_MAX_DEVICES ||
+ file->f_dentry->d_inode->i_rdev !=
+ MKDEV(MISC_MAJOR, pmem[id].dev.minor))) ? 0 : 1;
+}
+
+static int has_allocation(struct file *file)
+{
+ /* must be called with at least read lock held on
+ * ((struct pmem_data *)(file->private_data))->sem which
+ * means that file is guaranteed not to be NULL upon entry!!
+ * check is_pmem_file first if not accessed via pmem_file_ops */
+ struct pmem_data *pdata = file->private_data;
+ return pdata && pdata->index != -1;
+}
+
+static int is_master_owner(struct file *file)
+{
+ struct file *master_file;
+ struct pmem_data *data = file->private_data;
+ int put_needed, ret = 0;
+
+ if (!has_allocation(file))
+ return 0;
+ if (PMEM_FLAGS_MASTERMAP & data->flags)
+ return 1;
+ master_file = fget_light(data->master_fd, &put_needed);
+ if (master_file && data->master_file == master_file)
+ ret = 1;
+ if (master_file)
+ fput_light(master_file, put_needed);
+ return ret;
+}
+
+static int pmem_free_all_or_nothing(int id, int index)
+{
+ /* caller should hold the lock on arena_mutex! */
+ DLOG("index %d\n", index);
+
+ pmem[id].allocator.all_or_nothing.allocated = 0;
+ return 0;
+}
+
+static int pmem_free_space_all_or_nothing(int id,
+ struct pmem_freespace *fs)
+{
+ /* caller should hold the lock on arena_mutex! */
+ fs->total = (unsigned long)
+ pmem[id].allocator.all_or_nothing.allocated == 0 ?
+ pmem[id].size : 0;
+
+ fs->largest = fs->total;
+ return 0;
+}
+
+
+static int pmem_free_buddy_bestfit(int id, int index)
+{
+ /* caller should hold the lock on arena_mutex! */
+ int curr = index;
+ DLOG("index %d\n", index);
+
+
+ /* clean up the bitmap, merging any buddies */
+ pmem[id].allocator.buddy_bestfit.buddy_bitmap[curr].allocated = 0;
+ /* find a slots buddy Buddy# = Slot# ^ (1 << order)
+ * if the buddy is also free merge them
+ * repeat until the buddy is not free or end of the bitmap is reached
+ */
+ do {
+ int buddy = PMEM_BUDDY_INDEX(id, curr);
+ if (buddy < pmem[id].num_entries &&
+ PMEM_IS_FREE_BUDDY(id, buddy) &&
+ PMEM_BUDDY_ORDER(id, buddy) ==
+ PMEM_BUDDY_ORDER(id, curr)) {
+ PMEM_BUDDY_ORDER(id, buddy)++;
+ PMEM_BUDDY_ORDER(id, curr)++;
+ curr = min(buddy, curr);
+ } else {
+ break;
+ }
+ } while (curr < pmem[id].num_entries);
+
+ return 0;
+}
+
+
+static int pmem_free_space_buddy_bestfit(int id,
+ struct pmem_freespace *fs)
+{
+ /* caller should hold the lock on arena_mutex! */
+ int curr;
+ unsigned long size;
+ fs->total = 0;
+ fs->largest = 0;
+
+ for (curr = 0; curr < pmem[id].num_entries;
+ curr = PMEM_BUDDY_NEXT_INDEX(id, curr)) {
+ if (PMEM_IS_FREE_BUDDY(id, curr)) {
+ size = PMEM_BUDDY_LEN(id, curr);
+ if (size > fs->largest)
+ fs->largest = size;
+ fs->total += size;
+ }
+ }
+ return 0;
+}
+
+
+static inline uint32_t start_mask(int bit_start)
+{
+ return (uint32_t)(~0) << (bit_start & PMEM_BITS_PER_WORD_MASK);
+}
+
+static inline uint32_t end_mask(int bit_end)
+{
+ return (uint32_t)(~0) >>
+ ((BITS_PER_LONG - bit_end) & PMEM_BITS_PER_WORD_MASK);
+}
+
+static inline int compute_total_words(int bit_end, int word_index)
+{
+ return ((bit_end + BITS_PER_LONG - 1) >>
+ PMEM_32BIT_WORD_ORDER) - word_index;
+}
+
+static void bitmap_bits_clear_all(uint32_t *bitp, int bit_start, int bit_end)
+{
+ int word_index = bit_start >> PMEM_32BIT_WORD_ORDER, total_words;
+
+ total_words = compute_total_words(bit_end, word_index);
+ if (total_words > 0) {
+ if (total_words == 1) {
+ bitp[word_index] &=
+ ~(start_mask(bit_start) & end_mask(bit_end));
+ } else {
+ bitp[word_index++] &= ~start_mask(bit_start);
+ if (total_words > 2) {
+ int total_bytes;
+
+ total_words -= 2;
+ total_bytes = total_words << 2;
+
+ memset(&bitp[word_index], 0, total_bytes);
+ word_index += total_words;
+ }
+ bitp[word_index] &= ~end_mask(bit_end);
+ }
+ }
+}
+
+static int pmem_free_bitmap(int id, int bitnum)
+{
+ /* caller should hold the lock on arena_mutex! */
+ int i;
+ char currtask_name[FIELD_SIZEOF(struct task_struct, comm) + 1];
+
+ DLOG("bitnum %d\n", bitnum);
+
+ for (i = 0; i < pmem[id].allocator.bitmap.bitmap_allocs; i++) {
+ const int curr_bit =
+ pmem[id].allocator.bitmap.bitm_alloc[i].bit;
+
+ if (curr_bit == bitnum) {
+ const int curr_quanta =
+ pmem[id].allocator.bitmap.bitm_alloc[i].quanta;
+
+ bitmap_bits_clear_all(pmem[id].allocator.bitmap.bitmap,
+ curr_bit, curr_bit + curr_quanta);
+ pmem[id].allocator.bitmap.bitmap_free += curr_quanta;
+ pmem[id].allocator.bitmap.bitm_alloc[i].bit = -1;
+ pmem[id].allocator.bitmap.bitm_alloc[i].quanta = 0;
+ return 0;
+ }
+ }
+ printk(KERN_ALERT "pmem: %s: Attempt to free unallocated index %d, id"
+ " %d, pid %d(%s)\n", __func__, bitnum, id, current->pid,
+ get_task_comm(currtask_name, current));
+
+ return -1;
+}
+
+static int pmem_free_system(int id, int index)
+{
+ /* caller should hold the lock on arena_mutex! */
+ struct alloc_list *item;
+
+ DLOG("index %d\n", index);
+ if (index != 0)
+ item = (struct alloc_list *)index;
+ else
+ return 0;
+
+ if (item->vaddr != NULL) {
+ iounmap(item->vaddr);
+ kfree(__va(item->addr));
+ list_del(&item->allocs);
+ kfree(item);
+ }
+
+ return 0;
+}
+
+static int pmem_free_space_bitmap(int id, struct pmem_freespace *fs)
+{
+ int i, j;
+ int max_allocs = pmem[id].allocator.bitmap.bitmap_allocs;
+ int alloc_start = 0;
+ int next_alloc;
+ unsigned long size = 0;
+
+ fs->total = 0;
+ fs->largest = 0;
+
+ for (i = 0; i < max_allocs; i++) {
+
+ int alloc_quanta = 0;
+ int alloc_idx = 0;
+ next_alloc = pmem[id].num_entries;
+
+ /* Look for the lowest bit where next allocation starts */
+ for (j = 0; j < max_allocs; j++) {
+ const int curr_alloc = pmem[id].allocator.
+ bitmap.bitm_alloc[j].bit;
+ if (curr_alloc != -1) {
+ if (alloc_start == curr_alloc)
+ alloc_idx = j;
+ if (alloc_start >= curr_alloc)
+ continue;
+ if (curr_alloc < next_alloc)
+ next_alloc = curr_alloc;
+ }
+ }
+ alloc_quanta = pmem[id].allocator.bitmap.
+ bitm_alloc[alloc_idx].quanta;
+ size = (next_alloc - (alloc_start + alloc_quanta)) *
+ pmem[id].quantum;
+
+ if (size > fs->largest)
+ fs->largest = size;
+ fs->total += size;
+
+ if (next_alloc == pmem[id].num_entries)
+ break;
+ else
+ alloc_start = next_alloc;
+ }
+
+ return 0;
+}
+
+static int pmem_free_space_system(int id, struct pmem_freespace *fs)
+{
+ fs->total = pmem[id].size;
+ fs->largest = pmem[id].size;
+
+ return 0;
+}
+
+static void pmem_revoke(struct file *file, struct pmem_data *data);
+
+static int pmem_release(struct inode *inode, struct file *file)
+{
+ struct pmem_data *data = file->private_data;
+ struct pmem_region_node *region_node;
+ struct list_head *elt, *elt2;
+ int id = get_id(file), ret = 0;
+
+#if PMEM_DEBUG_MSGS
+ char currtask_name[FIELD_SIZEOF(struct task_struct, comm) + 1];
+#endif
+ DLOG("releasing memory pid %u(%s) file %p(%ld) dev %s(id: %d)\n",
+ current->pid, get_task_comm(currtask_name, current),
+ file, file_count(file), get_name(file), id);
+ mutex_lock(&pmem[id].data_list_mutex);
+ /* if this file is a master, revoke all the memory in the connected
+ * files */
+ if (PMEM_FLAGS_MASTERMAP & data->flags) {
+ list_for_each(elt, &pmem[id].data_list) {
+ struct pmem_data *sub_data =
+ list_entry(elt, struct pmem_data, list);
+ int is_master;
+
+ down_read(&sub_data->sem);
+ is_master = (PMEM_IS_SUBMAP(sub_data) &&
+ file == sub_data->master_file);
+ up_read(&sub_data->sem);
+
+ if (is_master)
+ pmem_revoke(file, sub_data);
+ }
+ }
+ list_del(&data->list);
+ mutex_unlock(&pmem[id].data_list_mutex);
+
+ down_write(&data->sem);
+
+ /* if it is not a connected file and it has an allocation, free it */
+ if (!(PMEM_FLAGS_CONNECTED & data->flags) && has_allocation(file)) {
+ mutex_lock(&pmem[id].arena_mutex);
+ ret = pmem_free_from_id(id, data->index);
+ mutex_unlock(&pmem[id].arena_mutex);
+ }
+
+ /* if this file is a submap (mapped, connected file), downref the
+ * task struct */
+ if (PMEM_FLAGS_SUBMAP & data->flags)
+ if (data->task) {
+ put_task_struct(data->task);
+ data->task = NULL;
+ }
+
+ file->private_data = NULL;
+
+ list_for_each_safe(elt, elt2, &data->region_list) {
+ region_node = list_entry(elt, struct pmem_region_node, list);
+ list_del(elt);
+ kfree(region_node);
+ }
+ BUG_ON(!list_empty(&data->region_list));
+
+ up_write(&data->sem);
+ kfree(data);
+ if (pmem[id].release)
+ ret = pmem[id].release(inode, file);
+
+ return ret;
+}
+
+static int pmem_open(struct inode *inode, struct file *file)
+{
+ struct pmem_data *data;
+ int id = get_id(file);
+ int ret = 0;
+#if PMEM_DEBUG_MSGS
+ char currtask_name[FIELD_SIZEOF(struct task_struct, comm) + 1];
+#endif
+
+ DLOG("pid %u(%s) file %p(%ld) dev %s(id: %d)\n",
+ current->pid, get_task_comm(currtask_name, current),
+ file, file_count(file), get_name(file), id);
+ data = kmalloc(sizeof(struct pmem_data), GFP_KERNEL);
+ if (!data) {
+ printk(KERN_ALERT "pmem: %s: unable to allocate memory for "
+ "pmem metadata.", __func__);
+ return -1;
+ }
+ data->flags = 0;
+ data->index = -1;
+ data->task = NULL;
+ data->vma = NULL;
+ data->pid = 0;
+ data->master_file = NULL;
+#if PMEM_DEBUG
+ data->ref = 0;
+#endif
+ INIT_LIST_HEAD(&data->region_list);
+ init_rwsem(&data->sem);
+
+ file->private_data = data;
+ INIT_LIST_HEAD(&data->list);
+
+ mutex_lock(&pmem[id].data_list_mutex);
+ list_add(&data->list, &pmem[id].data_list);
+ mutex_unlock(&pmem[id].data_list_mutex);
+ return ret;
+}
+
+static unsigned long pmem_order(unsigned long len, int id)
+{
+ int i;
+
+ len = (len + pmem[id].quantum - 1)/pmem[id].quantum;
+ len--;
+ for (i = 0; i < sizeof(len)*8; i++)
+ if (len >> i == 0)
+ break;
+ return i;
+}
+
+static int pmem_allocator_all_or_nothing(const int id,
+ const unsigned long len,
+ const unsigned int align)
+{
+ /* caller should hold the lock on arena_mutex! */
+ DLOG("all or nothing\n");
+ if ((len > pmem[id].size) ||
+ pmem[id].allocator.all_or_nothing.allocated)
+ return -1;
+ pmem[id].allocator.all_or_nothing.allocated = 1;
+ return len;
+}
+
+static int pmem_allocator_buddy_bestfit(const int id,
+ const unsigned long len,
+ unsigned int align)
+{
+ /* caller should hold the lock on arena_mutex! */
+ int curr;
+ int best_fit = -1;
+ unsigned long order;
+
+ DLOG("buddy bestfit\n");
+ order = pmem_order(len, id);
+ if (order > PMEM_MAX_ORDER)
+ goto out;
+
+ DLOG("order %lx\n", order);
+
+ /* Look through the bitmap.
+ * If a free slot of the correct order is found, use it.
+ * Otherwise, use the best fit (smallest with size > order) slot.
+ */
+ for (curr = 0;
+ curr < pmem[id].num_entries;
+ curr = PMEM_BUDDY_NEXT_INDEX(id, curr))
+ if (PMEM_IS_FREE_BUDDY(id, curr)) {
+ if (PMEM_BUDDY_ORDER(id, curr) ==
+ (unsigned char)order) {
+ /* set the not free bit and clear others */
+ best_fit = curr;
+ break;
+ }
+ if (PMEM_BUDDY_ORDER(id, curr) >
+ (unsigned char)order &&
+ (best_fit < 0 ||
+ PMEM_BUDDY_ORDER(id, curr) <
+ PMEM_BUDDY_ORDER(id, best_fit)))
+ best_fit = curr;
+ }
+
+ /* if best_fit < 0, there are no suitable slots; return an error */
+ if (best_fit < 0) {
+#if PMEM_DEBUG
+ printk(KERN_ALERT "pmem: %s: no space left to allocate!\n",
+ __func__);
+#endif
+ goto out;
+ }
+
+ /* now partition the best fit:
+ * split the slot into 2 buddies of order - 1
+ * repeat until the slot is of the correct order
+ */
+ while (PMEM_BUDDY_ORDER(id, best_fit) > (unsigned char)order) {
+ int buddy;
+ PMEM_BUDDY_ORDER(id, best_fit) -= 1;
+ buddy = PMEM_BUDDY_INDEX(id, best_fit);
+ PMEM_BUDDY_ORDER(id, buddy) = PMEM_BUDDY_ORDER(id, best_fit);
+ }
+ pmem[id].allocator.buddy_bestfit.buddy_bitmap[best_fit].allocated = 1;
+out:
+ return best_fit;
+}
+
+
+static inline unsigned long paddr_from_bit(const int id, const int bitnum)
+{
+ return pmem[id].base + pmem[id].quantum * bitnum;
+}
+
+static inline unsigned long bit_from_paddr(const int id,
+ const unsigned long paddr)
+{
+ return (paddr - pmem[id].base) / pmem[id].quantum;
+}
+
+static void bitmap_bits_set_all(uint32_t *bitp, int bit_start, int bit_end)
+{
+ int word_index = bit_start >> PMEM_32BIT_WORD_ORDER, total_words;
+
+ total_words = compute_total_words(bit_end, word_index);
+ if (total_words > 0) {
+ if (total_words == 1) {
+ bitp[word_index] |=
+ (start_mask(bit_start) & end_mask(bit_end));
+ } else {
+ bitp[word_index++] |= start_mask(bit_start);
+ if (total_words > 2) {
+ int total_bytes;
+
+ total_words -= 2;
+ total_bytes = total_words << 2;
+
+ memset(&bitp[word_index], ~0, total_bytes);
+ word_index += total_words;
+ }
+ bitp[word_index] |= end_mask(bit_end);
+ }
+ }
+}
+
+static int
+bitmap_allocate_contiguous(uint32_t *bitp, int num_bits_to_alloc,
+ int total_bits, int spacing, int start_bit)
+{
+ int bit_start, last_bit, word_index;
+
+ if (num_bits_to_alloc <= 0)
+ return -1;
+
+ for (bit_start = start_bit; ;
+ bit_start = ((last_bit +
+ (word_index << PMEM_32BIT_WORD_ORDER) + spacing - 1)
+ & ~(spacing - 1)) + start_bit) {
+ int bit_end = bit_start + num_bits_to_alloc, total_words;
+
+ if (bit_end > total_bits)
+ return -1; /* out of contiguous memory */
+
+ word_index = bit_start >> PMEM_32BIT_WORD_ORDER;
+ total_words = compute_total_words(bit_end, word_index);
+
+ if (total_words <= 0)
+ return -1;
+
+ if (total_words == 1) {
+ last_bit = fls(bitp[word_index] &
+ (start_mask(bit_start) &
+ end_mask(bit_end)));
+ if (last_bit)
+ continue;
+ } else {
+ int end_word = word_index + (total_words - 1);
+ last_bit =
+ fls(bitp[word_index] & start_mask(bit_start));
+ if (last_bit)
+ continue;
+
+ for (word_index++;
+ word_index < end_word;
+ word_index++) {
+ last_bit = fls(bitp[word_index]);
+ if (last_bit)
+ break;
+ }
+ if (last_bit)
+ continue;
+
+ last_bit = fls(bitp[word_index] & end_mask(bit_end));
+ if (last_bit)
+ continue;
+ }
+ bitmap_bits_set_all(bitp, bit_start, bit_end);
+ return bit_start;
+ }
+ return -1;
+}
+
+static int reserve_quanta(const unsigned int quanta_needed,
+ const int id,
+ unsigned int align)
+{
+ /* alignment should be a valid power of 2 */
+ int ret = -1, start_bit = 0, spacing = 1;
+
+ /* Sanity check */
+ if (quanta_needed > pmem[id].allocator.bitmap.bitmap_free) {
+#if PMEM_DEBUG
+ printk(KERN_ALERT "pmem: %s: request (%d) too big for"
+ " available free (%d)\n", __func__, quanta_needed,
+ pmem[id].allocator.bitmap.bitmap_free);
+#endif
+ return -1;
+ }
+
+ start_bit = bit_from_paddr(id,
+ (pmem[id].base + align - 1) & ~(align - 1));
+ if (start_bit <= -1) {
+#if PMEM_DEBUG
+ printk(KERN_ALERT
+ "pmem: %s: bit_from_paddr fails for"
+ " %u alignment.\n", __func__, align);
+#endif
+ return -1;
+ }
+ spacing = align / pmem[id].quantum;
+ spacing = spacing > 1 ? spacing : 1;
+
+ ret = bitmap_allocate_contiguous(pmem[id].allocator.bitmap.bitmap,
+ quanta_needed,
+ (pmem[id].size + pmem[id].quantum - 1) / pmem[id].quantum,
+ spacing,
+ start_bit);
+
+#if PMEM_DEBUG
+ if (ret < 0)
+ printk(KERN_ALERT "pmem: %s: not enough contiguous bits free "
+ "in bitmap! Region memory is either too fragmented or"
+ " request is too large for available memory.\n",
+ __func__);
+#endif
+
+ return ret;
+}
+
+static int pmem_allocator_bitmap(const int id,
+ const unsigned long len,
+ const unsigned int align)
+{
+ /* caller should hold the lock on arena_mutex! */
+ int bitnum, i;
+ unsigned int quanta_needed;
+
+ DLOG("bitmap id %d, len %ld, align %u\n", id, len, align);
+ if (!pmem[id].allocator.bitmap.bitm_alloc) {
+#if PMEM_DEBUG
+ printk(KERN_ALERT "pmem: bitm_alloc not present! id: %d\n",
+ id);
+#endif
+ return -1;
+ }
+
+ quanta_needed = (len + pmem[id].quantum - 1) / pmem[id].quantum;
+ DLOG("quantum size %u quanta needed %u free %u id %d\n",
+ pmem[id].quantum, quanta_needed,
+ pmem[id].allocator.bitmap.bitmap_free, id);
+
+ if (pmem[id].allocator.bitmap.bitmap_free < quanta_needed) {
+#if PMEM_DEBUG
+ printk(KERN_ALERT "pmem: memory allocation failure. "
+ "PMEM memory region exhausted, id %d."
+ " Unable to comply with allocation request.\n", id);
+#endif
+ return -1;
+ }
+
+ bitnum = reserve_quanta(quanta_needed, id, align);
+ if (bitnum == -1)
+ goto leave;
+
+ for (i = 0;
+ i < pmem[id].allocator.bitmap.bitmap_allocs &&
+ pmem[id].allocator.bitmap.bitm_alloc[i].bit != -1;
+ i++)
+ ;
+
+ if (i >= pmem[id].allocator.bitmap.bitmap_allocs) {
+ void *temp;
+ int32_t new_bitmap_allocs =
+ pmem[id].allocator.bitmap.bitmap_allocs << 1;
+ int j;
+
+ if (!new_bitmap_allocs) { /* failed sanity check!! */
+#if PMEM_DEBUG
+ pr_alert("pmem: bitmap_allocs number"
+ " wrapped around to zero! Something "
+ "is VERY wrong.\n");
+#endif
+ return -1;
+ }
+
+ if (new_bitmap_allocs > pmem[id].num_entries) {
+ /* failed sanity check!! */
+#if PMEM_DEBUG
+ pr_alert("pmem: required bitmap_allocs"
+ " number exceeds maximum entries possible"
+ " for current quanta\n");
+#endif
+ return -1;
+ }
+
+ temp = krealloc(pmem[id].allocator.bitmap.bitm_alloc,
+ new_bitmap_allocs *
+ sizeof(*pmem[id].allocator.bitmap.bitm_alloc),
+ GFP_KERNEL);
+ if (!temp) {
+#if PMEM_DEBUG
+ pr_alert("pmem: can't realloc bitmap_allocs,"
+ "id %d, current num bitmap allocs %d\n",
+ id, pmem[id].allocator.bitmap.bitmap_allocs);
+#endif
+ return -1;
+ }
+ pmem[id].allocator.bitmap.bitmap_allocs = new_bitmap_allocs;
+ pmem[id].allocator.bitmap.bitm_alloc = temp;
+
+ for (j = i; j < new_bitmap_allocs; j++) {
+ pmem[id].allocator.bitmap.bitm_alloc[j].bit = -1;
+ pmem[id].allocator.bitmap.bitm_alloc[i].quanta = 0;
+ }
+
+ DLOG("increased # of allocated regions to %d for id %d\n",
+ pmem[id].allocator.bitmap.bitmap_allocs, id);
+ }
+
+ DLOG("bitnum %d, bitm_alloc index %d\n", bitnum, i);
+
+ pmem[id].allocator.bitmap.bitmap_free -= quanta_needed;
+ pmem[id].allocator.bitmap.bitm_alloc[i].bit = bitnum;
+ pmem[id].allocator.bitmap.bitm_alloc[i].quanta = quanta_needed;
+leave:
+ return bitnum;
+}
+
+static int pmem_allocator_system(const int id,
+ const unsigned long len,
+ const unsigned int align)
+{
+ /* caller should hold the lock on arena_mutex! */
+ struct alloc_list *list;
+ unsigned long aligned_len;
+ int count = SYSTEM_ALLOC_RETRY;
+ void *buf;
+
+ DLOG("system id %d, len %ld, align %u\n", id, len, align);
+
+ if ((pmem[id].allocator.system_mem.used + len) > pmem[id].size) {
+ DLOG("requested size would be larger than quota\n");
+ return -1;
+ }
+
+ /* Handle alignment */
+ aligned_len = len + align;
+
+ /* Attempt allocation */
+ list = kmalloc(sizeof(struct alloc_list), GFP_KERNEL);
+ if (list == NULL) {
+ printk(KERN_ERR "pmem: failed to allocate system metadata\n");
+ return -1;
+ }
+ list->vaddr = NULL;
+
+ buf = NULL;
+ while ((buf == NULL) && count--) {
+ buf = kmalloc((aligned_len), GFP_KERNEL);
+ if (buf == NULL) {
+ DLOG("pmem: kmalloc %d temporarily failed len= %ld\n",
+ count, aligned_len);
+ }
+ }
+ if (!buf) {
+ printk(KERN_CRIT "pmem: kmalloc failed for id= %d len= %ld\n",
+ id, aligned_len);
+ kfree(list);
+ return -1;
+ }
+ list->size = aligned_len;
+ list->addr = (void *)__pa(buf);
+ list->aaddr = (void *)(((unsigned int)(list->addr) + (align - 1)) &
+ ~(align - 1));
+
+ if (!pmem[id].cached)
+ list->vaddr = ioremap(__pa(buf), aligned_len);
+ else
+ list->vaddr = ioremap_cached(__pa(buf), aligned_len);
+
+ INIT_LIST_HEAD(&list->allocs);
+ list_add(&list->allocs, &pmem[id].allocator.system_mem.alist);
+
+ return (int)list;
+}
+
+static pgprot_t pmem_phys_mem_access_prot(struct file *file, pgprot_t vma_prot)
+{
+ int id = get_id(file);
+#ifdef pgprot_writecombine
+ if (pmem[id].cached == 0 || file->f_flags & O_SYNC)
+ /* on ARMv6 and ARMv7 this expands to Normal Noncached */
+ return pgprot_writecombine(vma_prot);
+#endif
+#ifdef pgprot_ext_buffered
+ else if (pmem[id].buffered)
+ return pgprot_ext_buffered(vma_prot);
+#endif
+ return vma_prot;
+}
+
+static unsigned long pmem_start_addr_all_or_nothing(int id,
+ struct pmem_data *data)
+{
+ return PMEM_START_ADDR(id, 0);
+}
+
+static unsigned long pmem_start_addr_buddy_bestfit(int id,
+ struct pmem_data *data)
+{
+ return PMEM_START_ADDR(id, data->index);
+}
+
+static unsigned long pmem_start_addr_bitmap(int id, struct pmem_data *data)
+{
+ return data->index * pmem[id].quantum + pmem[id].base;
+}
+
+static unsigned long pmem_start_addr_system(int id, struct pmem_data *data)
+{
+ return (unsigned long)(((struct alloc_list *)(data->index))->aaddr);
+}
+
+static void *pmem_start_vaddr(int id, struct pmem_data *data)
+{
+ if (pmem[id].allocator_type == PMEM_ALLOCATORTYPE_SYSTEM)
+ return ((struct alloc_list *)(data->index))->vaddr;
+ else
+ return pmem[id].start_addr(id, data) - pmem[id].base + pmem[id].vbase;
+}
+
+static unsigned long pmem_len_all_or_nothing(int id, struct pmem_data *data)
+{
+ return data->index;
+}
+
+static unsigned long pmem_len_buddy_bestfit(int id, struct pmem_data *data)
+{
+ return PMEM_BUDDY_LEN(id, data->index);
+}
+
+static unsigned long pmem_len_bitmap(int id, struct pmem_data *data)
+{
+ int i;
+ unsigned long ret = 0;
+
+ mutex_lock(&pmem[id].arena_mutex);
+
+ for (i = 0; i < pmem[id].allocator.bitmap.bitmap_allocs; i++)
+ if (pmem[id].allocator.bitmap.bitm_alloc[i].bit ==
+ data->index) {
+ ret = pmem[id].allocator.bitmap.bitm_alloc[i].quanta *
+ pmem[id].quantum;
+ break;
+ }
+
+ mutex_unlock(&pmem[id].arena_mutex);
+#if PMEM_DEBUG
+ if (i >= pmem[id].allocator.bitmap.bitmap_allocs)
+ pr_alert("pmem: %s: can't find bitnum %d in "
+ "alloc'd array!\n", __func__, data->index);
+#endif
+ return ret;
+}
+
+static unsigned long pmem_len_system(int id, struct pmem_data *data)
+{
+ unsigned long ret = 0;
+
+ mutex_lock(&pmem[id].arena_mutex);
+
+ ret = ((struct alloc_list *)data->index)->size;
+ mutex_unlock(&pmem[id].arena_mutex);
+
+ return ret;
+}
+
+static int pmem_map_garbage(int id, struct vm_area_struct *vma,
+ struct pmem_data *data, unsigned long offset,
+ unsigned long len)
+{
+ int i, garbage_pages = len >> PAGE_SHIFT;
+
+ vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP | VM_PFNMAP | VM_SHARED | VM_WRITE;
+ for (i = 0; i < garbage_pages; i++) {
+ if (vm_insert_pfn(vma, vma->vm_start + offset + (i * PAGE_SIZE),
+ pmem[id].garbage_pfn))
+ return -EAGAIN;
+ }
+ return 0;
+}
+
+static int pmem_unmap_pfn_range(int id, struct vm_area_struct *vma,
+ struct pmem_data *data, unsigned long offset,
+ unsigned long len)
+{
+ int garbage_pages;
+ DLOG("unmap offset %lx len %lx\n", offset, len);
+
+ BUG_ON(!PMEM_IS_PAGE_ALIGNED(len));
+
+ garbage_pages = len >> PAGE_SHIFT;
+ zap_page_range(vma, vma->vm_start + offset, len, NULL);
+ pmem_map_garbage(id, vma, data, offset, len);
+ return 0;
+}
+
+static int pmem_map_pfn_range(int id, struct vm_area_struct *vma,
+ struct pmem_data *data, unsigned long offset,
+ unsigned long len)
+{
+ int ret;
+ DLOG("map offset %lx len %lx\n", offset, len);
+ BUG_ON(!PMEM_IS_PAGE_ALIGNED(vma->vm_start));
+ BUG_ON(!PMEM_IS_PAGE_ALIGNED(vma->vm_end));
+ BUG_ON(!PMEM_IS_PAGE_ALIGNED(len));
+ BUG_ON(!PMEM_IS_PAGE_ALIGNED(offset));
+
+ ret = io_remap_pfn_range(vma, vma->vm_start + offset,
+ (pmem[id].start_addr(id, data) + offset) >> PAGE_SHIFT,
+ len, vma->vm_page_prot);
+ if (ret) {
+#if PMEM_DEBUG
+ pr_alert("pmem: %s: io_remap_pfn_range fails with "
+ "return value: %d!\n", __func__, ret);
+#endif
+
+ ret = -EAGAIN;
+ }
+ return ret;
+}
+
+static int pmem_remap_pfn_range(int id, struct vm_area_struct *vma,
+ struct pmem_data *data, unsigned long offset,
+ unsigned long len)
+{
+ /* hold the mm semp for the vma you are modifying when you call this */
+ BUG_ON(!vma);
+ zap_page_range(vma, vma->vm_start + offset, len, NULL);
+ return pmem_map_pfn_range(id, vma, data, offset, len);
+}
+
+static void pmem_vma_open(struct vm_area_struct *vma)
+{
+ struct file *file = vma->vm_file;
+ struct pmem_data *data = file->private_data;
+ int id = get_id(file);
+
+#if PMEM_DEBUG_MSGS
+ char currtask_name[FIELD_SIZEOF(struct task_struct, comm) + 1];
+#endif
+ DLOG("Dev %s(id: %d) pid %u(%s) ppid %u file %p count %ld\n",
+ get_name(file), id, current->pid,
+ get_task_comm(currtask_name, current),
+ current->parent->pid, file, file_count(file));
+ /* this should never be called as we don't support copying pmem
+ * ranges via fork */
+ down_read(&data->sem);
+ BUG_ON(!has_allocation(file));
+ /* remap the garbage pages, forkers don't get access to the data */
+ pmem_unmap_pfn_range(id, vma, data, 0, vma->vm_start - vma->vm_end);
+ up_read(&data->sem);
+}
+
+static void pmem_vma_close(struct vm_area_struct *vma)
+{
+ struct file *file = vma->vm_file;
+ struct pmem_data *data = file->private_data;
+
+#if PMEM_DEBUG_MSGS
+ char currtask_name[FIELD_SIZEOF(struct task_struct, comm) + 1];
+#endif
+ DLOG("Dev %s(id: %d) pid %u(%s) ppid %u file %p count %ld\n",
+ get_name(file), get_id(file), current->pid,
+ get_task_comm(currtask_name, current),
+ current->parent->pid, file, file_count(file));
+
+ if (unlikely(!is_pmem_file(file))) {
+ pr_warning("pmem: something is very wrong, you are "
+ "closing a vm backing an allocation that doesn't "
+ "exist!\n");
+ return;
+ }
+
+ down_write(&data->sem);
+ if (unlikely(!has_allocation(file))) {
+ up_write(&data->sem);
+ pr_warning("pmem: something is very wrong, you are "
+ "closing a vm backing an allocation that doesn't "
+ "exist!\n");
+ return;
+ }
+ if (data->vma == vma) {
+ data->vma = NULL;
+ if ((data->flags & PMEM_FLAGS_CONNECTED) &&
+ (data->flags & PMEM_FLAGS_SUBMAP))
+ data->flags |= PMEM_FLAGS_UNSUBMAP;
+ }
+ /* the kernel is going to free this vma now anyway */
+ up_write(&data->sem);
+}
+
+static struct vm_operations_struct vm_ops = {
+ .open = pmem_vma_open,
+ .close = pmem_vma_close,
+};
+
+static int pmem_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct pmem_data *data = file->private_data;
+ int index = -1;
+ unsigned long vma_size = vma->vm_end - vma->vm_start;
+ int ret = 0, id = get_id(file);
+#if PMEM_DEBUG_MSGS
+ char currtask_name[FIELD_SIZEOF(struct task_struct, comm) + 1];
+#endif
+
+ if (!data) {
+ pr_err("pmem: Invalid file descriptor, no private data\n");
+ return -EINVAL;
+ }
+ DLOG("pid %u(%s) mmap vma_size %lu on dev %s(id: %d)\n", current->pid,
+ get_task_comm(currtask_name, current), vma_size,
+ get_name(file), id);
+ if (vma->vm_pgoff || !PMEM_IS_PAGE_ALIGNED(vma_size)) {
+#if PMEM_DEBUG
+ pr_err("pmem: mmaps must be at offset zero, aligned"
+ " and a multiple of pages_size.\n");
+#endif
+ return -EINVAL;
+ }
+
+ down_write(&data->sem);
+ /* check this file isn't already mmaped, for submaps check this file
+ * has never been mmaped */
+ if ((data->flags & PMEM_FLAGS_SUBMAP) ||
+ (data->flags & PMEM_FLAGS_UNSUBMAP)) {
+#if PMEM_DEBUG
+ pr_err("pmem: you can only mmap a pmem file once, "
+ "this file is already mmaped. %x\n", data->flags);
+#endif
+ ret = -EINVAL;
+ goto error;
+ }
+ /* if file->private_data == unalloced, alloc*/
+ if (data->index == -1) {
+ mutex_lock(&pmem[id].arena_mutex);
+ index = pmem_allocate_from_id(id,
+ vma->vm_end - vma->vm_start,
+ SZ_4K);
+ mutex_unlock(&pmem[id].arena_mutex);
+ /* either no space was available or an error occured */
+ if (index == -1) {
+ pr_err("pmem: mmap unable to allocate memory"
+ "on %s\n", get_name(file));
+ ret = -ENOMEM;
+ goto error;
+ }
+ /* store the index of a successful allocation */
+ data->index = index;
+ }
+
+ if (pmem[id].len(id, data) < vma_size) {
+#if PMEM_DEBUG
+ pr_err("pmem: mmap size [%lu] does not match"
+ " size of backing region [%lu].\n", vma_size,
+ pmem[id].len(id, data));
+#endif
+ ret = -EINVAL;
+ goto error;
+ }
+
+ vma->vm_pgoff = pmem[id].start_addr(id, data) >> PAGE_SHIFT;
+
+ vma->vm_page_prot = pmem_phys_mem_access_prot(file, vma->vm_page_prot);
+
+ if (data->flags & PMEM_FLAGS_CONNECTED) {
+ struct pmem_region_node *region_node;
+ struct list_head *elt;
+ if (pmem_map_garbage(id, vma, data, 0, vma_size)) {
+ pr_alert("pmem: mmap failed in kernel!\n");
+ ret = -EAGAIN;
+ goto error;
+ }
+ list_for_each(elt, &data->region_list) {
+ region_node = list_entry(elt, struct pmem_region_node,
+ list);
+ DLOG("remapping file: %p %lx %lx\n", file,
+ region_node->region.offset,
+ region_node->region.len);
+ if (pmem_remap_pfn_range(id, vma, data,
+ region_node->region.offset,
+ region_node->region.len)) {
+ ret = -EAGAIN;
+ goto error;
+ }
+ }
+ data->flags |= PMEM_FLAGS_SUBMAP;
+ get_task_struct(current->group_leader);
+ data->task = current->group_leader;
+ data->vma = vma;
+#if PMEM_DEBUG
+ data->pid = current->pid;
+#endif
+ DLOG("submmapped file %p vma %p pid %u\n", file, vma,
+ current->pid);
+ } else {
+ if (pmem_map_pfn_range(id, vma, data, 0, vma_size)) {
+ pr_err("pmem: mmap failed in kernel!\n");
+ ret = -EAGAIN;
+ goto error;
+ }
+ data->flags |= PMEM_FLAGS_MASTERMAP;
+ data->pid = current->pid;
+ }
+ vma->vm_ops = &vm_ops;
+error:
+ up_write(&data->sem);
+ return ret;
+}
+
+/* the following are the api for accessing pmem regions by other drivers
+ * from inside the kernel */
+int get_pmem_user_addr(struct file *file, unsigned long *start,
+ unsigned long *len)
+{
+ int ret = -1;
+
+ if (is_pmem_file(file)) {
+ struct pmem_data *data = file->private_data;
+
+ down_read(&data->sem);
+ if (has_allocation(file)) {
+ if (data->vma) {
+ *start = data->vma->vm_start;
+ *len = data->vma->vm_end - data->vma->vm_start;
+ } else {
+ *start = *len = 0;
+#if PMEM_DEBUG
+ pr_err("pmem: %s: no vma present.\n",
+ __func__);
+#endif
+ }
+ ret = 0;
+ }
+ up_read(&data->sem);
+ }
+
+#if PMEM_DEBUG
+ if (ret)
+ pr_err("pmem: %s: requested pmem data from invalid"
+ "file.\n", __func__);
+#endif
+ return ret;
+}
+
+int get_pmem_addr(struct file *file, unsigned long *start,
+ unsigned long *vstart, unsigned long *len)
+{
+ int ret = -1;
+
+ if (is_pmem_file(file)) {
+ struct pmem_data *data = file->private_data;
+
+ down_read(&data->sem);
+ if (has_allocation(file)) {
+ int id = get_id(file);
+
+ *start = pmem[id].start_addr(id, data);
+ *len = pmem[id].len(id, data);
+ *vstart = (unsigned long)
+ pmem_start_vaddr(id, data);
+ up_read(&data->sem);
+#if PMEM_DEBUG
+ down_write(&data->sem);
+ data->ref++;
+ up_write(&data->sem);
+#endif
+ DLOG("returning start %#lx len %lu "
+ "vstart %#lx\n",
+ *start, *len, *vstart);
+ ret = 0;
+ } else {
+ up_read(&data->sem);
+ }
+ }
+ return ret;
+}
+
+int get_pmem_file(unsigned int fd, unsigned long *start, unsigned long *vstart,
+ unsigned long *len, struct file **filp)
+{
+ int ret = -1;
+ struct file *file = fget(fd);
+
+ if (unlikely(file == NULL)) {
+ pr_err("pmem: %s: requested data from file "
+ "descriptor that doesn't exist.\n", __func__);
+ } else {
+#if PMEM_DEBUG_MSGS
+ char currtask_name[FIELD_SIZEOF(struct task_struct, comm) + 1];
+#endif
+ DLOG("filp %p rdev %d pid %u(%s) file %p(%ld)"
+ " dev %s(id: %d)\n", filp,
+ file->f_dentry->d_inode->i_rdev,
+ current->pid, get_task_comm(currtask_name, current),
+ file, file_count(file), get_name(file), get_id(file));
+
+ if (!get_pmem_addr(file, start, vstart, len)) {
+ if (filp)
+ *filp = file;
+ ret = 0;
+ } else {
+ fput(file);
+ }
+ }
+ return ret;
+}
+EXPORT_SYMBOL(get_pmem_file);
+
+int get_pmem_fd(int fd, unsigned long *start, unsigned long *len)
+{
+ unsigned long vstart;
+ return get_pmem_file(fd, start, &vstart, len, NULL);
+}
+EXPORT_SYMBOL(get_pmem_fd);
+
+void put_pmem_file(struct file *file)
+{
+#if PMEM_DEBUG_MSGS
+ char currtask_name[FIELD_SIZEOF(struct task_struct, comm) + 1];
+#endif
+ DLOG("rdev %d pid %u(%s) file %p(%ld)" " dev %s(id: %d)\n",
+ file->f_dentry->d_inode->i_rdev, current->pid,
+ get_task_comm(currtask_name, current), file,
+ file_count(file), get_name(file), get_id(file));
+ if (is_pmem_file(file)) {
+#if PMEM_DEBUG
+ struct pmem_data *data = file->private_data;
+
+ down_write(&data->sem);
+ if (!data->ref--) {
+ data->ref++;
+ pr_alert("pmem: pmem_put > pmem_get %s "
+ "(pid %d)\n",
+ pmem[get_id(file)].dev.name, data->pid);
+ BUG();
+ }
+ up_write(&data->sem);
+#endif
+ fput(file);
+ }
+}
+EXPORT_SYMBOL(put_pmem_file);
+
+void put_pmem_fd(int fd)
+{
+ int put_needed;
+ struct file *file = fget_light(fd, &put_needed);
+
+ if (file) {
+ put_pmem_file(file);
+ fput_light(file, put_needed);
+ }
+}
+
+void flush_pmem_fd(int fd, unsigned long offset, unsigned long len)
+{
+ int fput_needed;
+ struct file *file = fget_light(fd, &fput_needed);
+
+ if (file) {
+ flush_pmem_file(file, offset, len);
+ fput_light(file, fput_needed);
+ }
+}
+
+void flush_pmem_file(struct file *file, unsigned long offset, unsigned long len)
+{
+ struct pmem_data *data;
+ int id;
+ void *vaddr;
+ struct pmem_region_node *region_node;
+ struct list_head *elt;
+ void *flush_start, *flush_end;
+#ifdef CONFIG_OUTER_CACHE
+ unsigned long phy_start, phy_end;
+#endif
+ if (!is_pmem_file(file))
+ return;
+
+ id = get_id(file);
+ if (!pmem[id].cached)
+ return;
+
+ /* is_pmem_file fails if !file */
+ data = file->private_data;
+
+ down_read(&data->sem);
+ if (!has_allocation(file))
+ goto end;
+
+ vaddr = pmem_start_vaddr(id, data);
+
+ if (pmem[id].allocator_type == PMEM_ALLOCATORTYPE_SYSTEM) {
+ dmac_flush_range(vaddr,
+ (void *)((unsigned long)vaddr +
+ ((struct alloc_list *)(data->index))->size));
+#ifdef CONFIG_OUTER_CACHE
+ phy_start = pmem_start_addr_system(id, data);
+
+ phy_end = phy_start +
+ ((struct alloc_list *)(data->index))->size;
+
+ outer_flush_range(phy_start, phy_end);
+#endif
+ goto end;
+ }
+ /* if this isn't a submmapped file, flush the whole thing */
+ if (unlikely(!(data->flags & PMEM_FLAGS_CONNECTED))) {
+ dmac_flush_range(vaddr, vaddr + pmem[id].len(id, data));
+#ifdef CONFIG_OUTER_CACHE
+ phy_start = (unsigned long)vaddr -
+ (unsigned long)pmem[id].vbase + pmem[id].base;
+
+ phy_end = phy_start + pmem[id].len(id, data);
+
+ outer_flush_range(phy_start, phy_end);
+#endif
+ goto end;
+ }
+ /* otherwise, flush the region of the file we are drawing */
+ list_for_each(elt, &data->region_list) {
+ region_node = list_entry(elt, struct pmem_region_node, list);
+ if ((offset >= region_node->region.offset) &&
+ ((offset + len) <= (region_node->region.offset +
+ region_node->region.len))) {
+ flush_start = vaddr + region_node->region.offset;
+ flush_end = flush_start + region_node->region.len;
+ dmac_flush_range(flush_start, flush_end);
+#ifdef CONFIG_OUTER_CACHE
+
+ phy_start = (unsigned long)flush_start -
+ (unsigned long)pmem[id].vbase + pmem[id].base;
+
+ phy_end = phy_start + region_node->region.len;
+
+ outer_flush_range(phy_start, phy_end);
+#endif
+ break;
+ }
+ }
+end:
+ up_read(&data->sem);
+}
+
+int pmem_cache_maint(struct file *file, unsigned int cmd,
+ struct pmem_addr *pmem_addr)
+{
+ struct pmem_data *data;
+ int id;
+ unsigned long vaddr, paddr, length, offset,
+ pmem_len, pmem_start_addr;
+
+ /* Called from kernel-space so file may be NULL */
+ if (!file)
+ return -EBADF;
+
+ /*
+ * check that the vaddr passed for flushing is valid
+ * so that you don't crash the kernel
+ */
+ if (!pmem_addr->vaddr)
+ return -EINVAL;
+
+ data = file->private_data;
+ id = get_id(file);
+
+ if (!pmem[id].cached)
+ return 0;
+
+ offset = pmem_addr->offset;
+ length = pmem_addr->length;
+
+ down_read(&data->sem);
+ if (!has_allocation(file)) {
+ up_read(&data->sem);
+ return -EINVAL;
+ }
+ pmem_len = pmem[id].len(id, data);
+ pmem_start_addr = pmem[id].start_addr(id, data);
+ up_read(&data->sem);
+
+ if (offset + length > pmem_len)
+ return -EINVAL;
+
+ vaddr = pmem_addr->vaddr;
+ paddr = pmem_start_addr + offset;
+
+ DLOG("pmem cache maint on dev %s(id: %d)"
+ "(vaddr %lx paddr %lx len %lu bytes)\n",
+ get_name(file), id, vaddr, paddr, length);
+ if (cmd == PMEM_CLEAN_INV_CACHES)
+ clean_and_invalidate_caches(vaddr,
+ length, paddr);
+ else if (cmd == PMEM_CLEAN_CACHES)
+ clean_caches(vaddr, length, paddr);
+ else if (cmd == PMEM_INV_CACHES)
+ invalidate_caches(vaddr, length, paddr);
+
+ return 0;
+}
+EXPORT_SYMBOL(pmem_cache_maint);
+
+static int pmem_connect(unsigned long connect, struct file *file)
+{
+ int ret = 0, put_needed;
+ struct file *src_file;
+
+ if (!file) {
+ pr_err("pmem: %s: NULL file pointer passed in, "
+ "bailing out!\n", __func__);
+ ret = -EINVAL;
+ goto leave;
+ }
+
+ src_file = fget_light(connect, &put_needed);
+
+ if (!src_file) {
+ pr_err("pmem: %s: src file not found!\n", __func__);
+ ret = -EBADF;
+ goto leave;
+ }
+
+ if (src_file == file) { /* degenerative case, operator error */
+ pr_err("pmem: %s: src_file and passed in file are "
+ "the same; refusing to connect to self!\n", __func__);
+ ret = -EINVAL;
+ goto put_src_file;
+ }
+
+ if (unlikely(!is_pmem_file(src_file))) {
+ pr_err("pmem: %s: src file is not a pmem file!\n",
+ __func__);
+ ret = -EINVAL;
+ goto put_src_file;
+ } else {
+ struct pmem_data *src_data = src_file->private_data;
+
+ if (!src_data) {
+ pr_err("pmem: %s: src file pointer has no"
+ "private data, bailing out!\n", __func__);
+ ret = -EINVAL;
+ goto put_src_file;
+ }
+
+ down_read(&src_data->sem);
+
+ if (unlikely(!has_allocation(src_file))) {
+ up_read(&src_data->sem);
+ pr_err("pmem: %s: src file has no allocation!\n",
+ __func__);
+ ret = -EINVAL;
+ } else {
+ struct pmem_data *data;
+ int src_index = src_data->index;
+
+ up_read(&src_data->sem);
+
+ data = file->private_data;
+ if (!data) {
+ pr_err("pmem: %s: passed in file "
+ "pointer has no private data, bailing"
+ " out!\n", __func__);
+ ret = -EINVAL;
+ goto put_src_file;
+ }
+
+ down_write(&data->sem);
+ if (has_allocation(file) &&
+ (data->index != src_index)) {
+ up_write(&data->sem);
+
+ pr_err("pmem: %s: file is already "
+ "mapped but doesn't match this "
+ "src_file!\n", __func__);
+ ret = -EINVAL;
+ } else {
+ data->index = src_index;
+ data->flags |= PMEM_FLAGS_CONNECTED;
+ data->master_fd = connect;
+ data->master_file = src_file;
+
+ up_write(&data->sem);
+
+ DLOG("connect %p to %p\n", file, src_file);
+ }
+ }
+ }
+put_src_file:
+ fput_light(src_file, put_needed);
+leave:
+ return ret;
+}
+
+static void pmem_unlock_data_and_mm(struct pmem_data *data,
+ struct mm_struct *mm)
+{
+ up_write(&data->sem);
+ if (mm != NULL) {
+ up_write(&mm->mmap_sem);
+ mmput(mm);
+ }
+}
+
+static int pmem_lock_data_and_mm(struct file *file, struct pmem_data *data,
+ struct mm_struct **locked_mm)
+{
+ int ret = 0;
+ struct mm_struct *mm = NULL;
+#if PMEM_DEBUG_MSGS
+ char currtask_name[FIELD_SIZEOF(struct task_struct, comm) + 1];
+#endif
+ DLOG("pid %u(%s) file %p(%ld)\n",
+ current->pid, get_task_comm(currtask_name, current),
+ file, file_count(file));
+
+ *locked_mm = NULL;
+lock_mm:
+ down_read(&data->sem);
+ if (PMEM_IS_SUBMAP(data)) {
+ mm = get_task_mm(data->task);
+ if (!mm) {
+ up_read(&data->sem);
+#if PMEM_DEBUG
+ pr_alert("pmem: can't remap - task is gone!\n");
+#endif
+ return -1;
+ }
+ }
+ up_read(&data->sem);
+
+ if (mm)
+ down_write(&mm->mmap_sem);
+
+ down_write(&data->sem);
+ /* check that the file didn't get mmaped before we could take the
+ * data sem, this should be safe b/c you can only submap each file
+ * once */
+ if (PMEM_IS_SUBMAP(data) && !mm) {
+ pmem_unlock_data_and_mm(data, mm);
+ DLOG("mapping contention, repeating mmap op\n");
+ goto lock_mm;
+ }
+ /* now check that vma.mm is still there, it could have been
+ * deleted by vma_close before we could get the data->sem */
+ if ((data->flags & PMEM_FLAGS_UNSUBMAP) && (mm != NULL)) {
+ /* might as well release this */
+ if (data->flags & PMEM_FLAGS_SUBMAP) {
+ put_task_struct(data->task);
+ data->task = NULL;
+ /* lower the submap flag to show the mm is gone */
+ data->flags &= ~(PMEM_FLAGS_SUBMAP);
+ }
+ pmem_unlock_data_and_mm(data, mm);
+#if PMEM_DEBUG
+ pr_alert("pmem: vma.mm went away!\n");
+#endif
+ return -1;
+ }
+ *locked_mm = mm;
+ return ret;
+}
+
+int pmem_remap(struct pmem_region *region, struct file *file,
+ unsigned operation)
+{
+ int ret;
+ struct pmem_region_node *region_node;
+ struct mm_struct *mm = NULL;
+ struct list_head *elt, *elt2;
+ int id = get_id(file);
+ struct pmem_data *data;
+
+ DLOG("operation %#x, region offset %ld, region len %ld\n",
+ operation, region->offset, region->len);
+
+ if (!is_pmem_file(file)) {
+#if PMEM_DEBUG
+ pr_err("pmem: remap request for non-pmem file descriptor\n");
+#endif
+ return -EINVAL;
+ }
+
+ /* is_pmem_file fails if !file */
+ data = file->private_data;
+
+ /* pmem region must be aligned on a page boundry */
+ if (unlikely(!PMEM_IS_PAGE_ALIGNED(region->offset) ||
+ !PMEM_IS_PAGE_ALIGNED(region->len))) {
+#if PMEM_DEBUG
+ pr_err("pmem: request for unaligned pmem"
+ "suballocation %lx %lx\n",
+ region->offset, region->len);
+#endif
+ return -EINVAL;
+ }
+
+ /* if userspace requests a region of len 0, there's nothing to do */
+ if (region->len == 0)
+ return 0;
+
+ /* lock the mm and data */
+ ret = pmem_lock_data_and_mm(file, data, &mm);
+ if (ret)
+ return 0;
+
+ /* only the owner of the master file can remap the client fds
+ * that back in it */
+ if (!is_master_owner(file)) {
+#if PMEM_DEBUG
+ pr_err("pmem: remap requested from non-master process\n");
+#endif
+ ret = -EINVAL;
+ goto err;
+ }
+
+ /* check that the requested range is within the src allocation */
+ if (unlikely((region->offset > pmem[id].len(id, data)) ||
+ (region->len > pmem[id].len(id, data)) ||
+ (region->offset + region->len > pmem[id].len(id, data)))) {
+#if PMEM_DEBUG
+ pr_err("pmem: suballoc doesn't fit in src_file!\n");
+#endif
+ ret = -EINVAL;
+ goto err;
+ }
+
+ if (operation == PMEM_MAP) {
+ region_node = kmalloc(sizeof(struct pmem_region_node),
+ GFP_KERNEL);
+ if (!region_node) {
+ ret = -ENOMEM;
+#if PMEM_DEBUG
+ pr_alert("pmem: No space to allocate remap metadata!");
+#endif
+ goto err;
+ }
+ region_node->region = *region;
+ list_add(&region_node->list, &data->region_list);
+ } else if (operation == PMEM_UNMAP) {
+ int found = 0;
+ list_for_each_safe(elt, elt2, &data->region_list) {
+ region_node = list_entry(elt, struct pmem_region_node,
+ list);
+ if (region->len == 0 ||
+ (region_node->region.offset == region->offset &&
+ region_node->region.len == region->len)) {
+ list_del(elt);
+ kfree(region_node);
+ found = 1;
+ }
+ }
+ if (!found) {
+#if PMEM_DEBUG
+ pr_err("pmem: Unmap region does not map any"
+ " mapped region!");
+#endif
+ ret = -EINVAL;
+ goto err;
+ }
+ }
+
+ if (data->vma && PMEM_IS_SUBMAP(data)) {
+ if (operation == PMEM_MAP)
+ ret = pmem_remap_pfn_range(id, data->vma, data,
+ region->offset, region->len);
+ else if (operation == PMEM_UNMAP)
+ ret = pmem_unmap_pfn_range(id, data->vma, data,
+ region->offset, region->len);
+ }
+
+err:
+ pmem_unlock_data_and_mm(data, mm);
+ return ret;
+}
+
+static void pmem_revoke(struct file *file, struct pmem_data *data)
+{
+ struct pmem_region_node *region_node;
+ struct list_head *elt, *elt2;
+ struct mm_struct *mm = NULL;
+ int id = get_id(file);
+ int ret = 0;
+
+ data->master_file = NULL;
+ ret = pmem_lock_data_and_mm(file, data, &mm);
+ /* if lock_data_and_mm fails either the task that mapped the fd, or
+ * the vma that mapped it have already gone away, nothing more
+ * needs to be done */
+ if (ret)
+ return;
+ /* unmap everything */
+ /* delete the regions and region list nothing is mapped any more */
+ if (data->vma)
+ list_for_each_safe(elt, elt2, &data->region_list) {
+ region_node = list_entry(elt, struct pmem_region_node,
+ list);
+ pmem_unmap_pfn_range(id, data->vma, data,
+ region_node->region.offset,
+ region_node->region.len);
+ list_del(elt);
+ kfree(region_node);
+ }
+ /* delete the master file */
+ pmem_unlock_data_and_mm(data, mm);
+}
+
+static void pmem_get_size(struct pmem_region *region, struct file *file)
+{
+ /* called via ioctl file op, so file guaranteed to be not NULL */
+ struct pmem_data *data = file->private_data;
+ int id = get_id(file);
+
+ down_read(&data->sem);
+ if (!has_allocation(file)) {
+ region->offset = 0;
+ region->len = 0;
+ } else {
+ region->offset = pmem[id].start_addr(id, data);
+ region->len = pmem[id].len(id, data);
+ }
+ up_read(&data->sem);
+ DLOG("offset 0x%lx len 0x%lx\n", region->offset, region->len);
+}
+
+
+static long pmem_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ /* called from user space as file op, so file guaranteed to be not
+ * NULL
+ */
+ struct pmem_data *data = file->private_data;
+ int id = get_id(file);
+#if PMEM_DEBUG_MSGS
+ char currtask_name[
+ FIELD_SIZEOF(struct task_struct, comm) + 1];
+#endif
+
+ DLOG("pid %u(%s) file %p(%ld) cmd %#x, dev %s(id: %d)\n",
+ current->pid, get_task_comm(currtask_name, current),
+ file, file_count(file), cmd, get_name(file), id);
+
+ switch (cmd) {
+ case PMEM_GET_PHYS:
+ {
+ struct pmem_region region;
+
+ DLOG("get_phys\n");
+ down_read(&data->sem);
+ if (!has_allocation(file)) {
+ region.offset = 0;
+ region.len = 0;
+ } else {
+ region.offset = pmem[id].start_addr(id, data);
+ region.len = pmem[id].len(id, data);
+ }
+ up_read(&data->sem);
+
+ if (copy_to_user((void __user *)arg, &region,
+ sizeof(struct pmem_region)))
+ return -EFAULT;
+
+ DLOG("pmem: successful request for "
+ "physical address of pmem region id %d, "
+ "offset 0x%lx, len 0x%lx\n",
+ id, region.offset, region.len);
+
+ break;
+ }
+ case PMEM_MAP:
+ {
+ struct pmem_region region;
+ DLOG("map\n");
+ if (copy_from_user(&region, (void __user *)arg,
+ sizeof(struct pmem_region)))
+ return -EFAULT;
+ return pmem_remap(&region, file, PMEM_MAP);
+ }
+ break;
+ case PMEM_UNMAP:
+ {
+ struct pmem_region region;
+ DLOG("unmap\n");
+ if (copy_from_user(&region, (void __user *)arg,
+ sizeof(struct pmem_region)))
+ return -EFAULT;
+ return pmem_remap(&region, file, PMEM_UNMAP);
+ break;
+ }
+ case PMEM_GET_SIZE:
+ {
+ struct pmem_region region;
+ DLOG("get_size\n");
+ pmem_get_size(&region, file);
+ if (copy_to_user((void __user *)arg, &region,
+ sizeof(struct pmem_region)))
+ return -EFAULT;
+ break;
+ }
+ case PMEM_GET_TOTAL_SIZE:
+ {
+ struct pmem_region region;
+ DLOG("get total size\n");
+ region.offset = 0;
+ get_id(file);
+ region.len = pmem[id].size;
+ if (copy_to_user((void __user *)arg, &region,
+ sizeof(struct pmem_region)))
+ return -EFAULT;
+ break;
+ }
+ case PMEM_GET_FREE_SPACE:
+ {
+ struct pmem_freespace fs;
+ DLOG("get freespace on %s(id: %d)\n",
+ get_name(file), id);
+
+ mutex_lock(&pmem[id].arena_mutex);
+ pmem[id].free_space(id, &fs);
+ mutex_unlock(&pmem[id].arena_mutex);
+
+ DLOG("%s(id: %d) total free %lu, largest %lu\n",
+ get_name(file), id, fs.total, fs.largest);
+
+ if (copy_to_user((void __user *)arg, &fs,
+ sizeof(struct pmem_freespace)))
+ return -EFAULT;
+ break;
+ }
+
+ case PMEM_ALLOCATE:
+ {
+ int ret = 0;
+ DLOG("allocate, id %d\n", id);
+ down_write(&data->sem);
+ if (has_allocation(file)) {
+ pr_err("pmem: Existing allocation found on "
+ "this file descrpitor\n");
+ up_write(&data->sem);
+ return -EINVAL;
+ }
+
+ mutex_lock(&pmem[id].arena_mutex);
+ data->index = pmem_allocate_from_id(id,
+ arg,
+ SZ_4K);
+ mutex_unlock(&pmem[id].arena_mutex);
+ ret = data->index == -1 ? -ENOMEM :
+ data->index;
+ up_write(&data->sem);
+ return ret;
+ }
+ case PMEM_ALLOCATE_ALIGNED:
+ {
+ struct pmem_allocation alloc;
+ int ret = 0;
+
+ if (copy_from_user(&alloc, (void __user *)arg,
+ sizeof(struct pmem_allocation)))
+ return -EFAULT;
+ DLOG("allocate id align %d %u\n", id, alloc.align);
+ down_write(&data->sem);
+ if (has_allocation(file)) {
+ pr_err("pmem: Existing allocation found on "
+ "this file descrpitor\n");
+ up_write(&data->sem);
+ return -EINVAL;
+ }
+
+ if (alloc.align & (alloc.align - 1)) {
+ pr_err("pmem: Alignment is not a power of 2\n");
+ return -EINVAL;
+ }
+
+ if (alloc.align != SZ_4K &&
+ (pmem[id].allocator_type !=
+ PMEM_ALLOCATORTYPE_BITMAP)) {
+ pr_err("pmem: Non 4k alignment requires bitmap"
+ " allocator on %s\n", pmem[id].name);
+ return -EINVAL;
+ }
+
+ if (alloc.align > SZ_1M ||
+ alloc.align < SZ_4K) {
+ pr_err("pmem: Invalid Alignment (%u) "
+ "specified\n", alloc.align);
+ return -EINVAL;
+ }
+
+ mutex_lock(&pmem[id].arena_mutex);
+ data->index = pmem_allocate_from_id(id,
+ alloc.size,
+ alloc.align);
+ mutex_unlock(&pmem[id].arena_mutex);
+ ret = data->index == -1 ? -ENOMEM :
+ data->index;
+ up_write(&data->sem);
+ return ret;
+ }
+ case PMEM_CONNECT:
+ DLOG("connect\n");
+ return pmem_connect(arg, file);
+ case PMEM_CLEAN_INV_CACHES:
+ case PMEM_CLEAN_CACHES:
+ case PMEM_INV_CACHES:
+ {
+ struct pmem_addr pmem_addr;
+
+ if (copy_from_user(&pmem_addr, (void __user *)arg,
+ sizeof(struct pmem_addr)))
+ return -EFAULT;
+
+ return pmem_cache_maint(file, cmd, &pmem_addr);
+ }
+ default:
+ if (pmem[id].ioctl)
+ return pmem[id].ioctl(file, cmd, arg);
+
+ DLOG("ioctl invalid (%#x)\n", cmd);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void ioremap_pmem(int id)
+{
+ unsigned long addr;
+ const struct mem_type *type;
+
+ DLOG("PMEMDEBUG: ioremaping for %s\n", pmem[id].name);
+ if (pmem[id].map_on_demand) {
+ addr = (unsigned long)pmem[id].area->addr;
+ if (pmem[id].cached)
+ type = get_mem_type(MT_DEVICE_CACHED);
+ else
+ type = get_mem_type(MT_DEVICE);
+ DLOG("PMEMDEBUG: Remap phys %lx to virt %lx on %s\n",
+ pmem[id].base, addr, pmem[id].name);
+ if (ioremap_pages(addr, pmem[id].base, pmem[id].size, type)) {
+ pr_err("pmem: Failed to map pages\n");
+ BUG();
+ }
+ pmem[id].vbase = pmem[id].area->addr;
+ /* Flush the cache after installing page table entries to avoid
+ * aliasing when these pages are remapped to user space.
+ */
+ flush_cache_vmap(addr, addr + pmem[id].size);
+ } else {
+ if (pmem[id].cached)
+ pmem[id].vbase = ioremap_cached(pmem[id].base,
+ pmem[id].size);
+ #ifdef ioremap_ext_buffered
+ else if (pmem[id].buffered)
+ pmem[id].vbase = ioremap_ext_buffered(pmem[id].base,
+ pmem[id].size);
+ #endif
+ else
+ pmem[id].vbase = ioremap(pmem[id].base, pmem[id].size);
+ }
+}
+
+int pmem_setup(struct android_pmem_platform_data *pdata,
+ long (*ioctl)(struct file *, unsigned int, unsigned long),
+ int (*release)(struct inode *, struct file *))
+{
+ int i, index = 0, id;
+ struct vm_struct *pmem_vma = NULL;
+ struct page *page;
+
+ if (id_count >= PMEM_MAX_DEVICES) {
+ pr_alert("pmem: %s: unable to register driver(%s) - no more "
+ "devices available!\n", __func__, pdata->name);
+ goto err_no_mem;
+ }
+
+ if (!pdata->size) {
+ pr_alert("pmem: %s: unable to register pmem driver(%s) - zero "
+ "size passed in!\n", __func__, pdata->name);
+ goto err_no_mem;
+ }
+
+ id = id_count++;
+
+ pmem[id].id = id;
+
+ if (pmem[id].allocate) {
+ pr_alert("pmem: %s: unable to register pmem driver - "
+ "duplicate registration of %s!\n",
+ __func__, pdata->name);
+ goto err_no_mem;
+ }
+
+ pmem[id].allocator_type = pdata->allocator_type;
+
+ /* 'quantum' is a "hidden" variable that defaults to 0 in the board
+ * files */
+ pmem[id].quantum = pdata->quantum ?: PMEM_MIN_ALLOC;
+ if (pmem[id].quantum < PMEM_MIN_ALLOC ||
+ !is_power_of_2(pmem[id].quantum)) {
+ pr_alert("pmem: %s: unable to register pmem driver %s - "
+ "invalid quantum value (%#x)!\n",
+ __func__, pdata->name, pmem[id].quantum);
+ goto err_reset_pmem_info;
+ }
+
+ if (pdata->size % pmem[id].quantum) {
+ /* bad alignment for size! */
+ pr_alert("pmem: %s: Unable to register driver %s - "
+ "memory region size (%#lx) is not a multiple of "
+ "quantum size(%#x)!\n", __func__, pdata->name,
+ pdata->size, pmem[id].quantum);
+ goto err_reset_pmem_info;
+ }
+
+ pmem[id].cached = pdata->cached;
+ pmem[id].buffered = pdata->buffered;
+ pmem[id].size = pdata->size;
+ pmem[id].memory_type = pdata->memory_type;
+ strlcpy(pmem[id].name, pdata->name, PMEM_NAME_SIZE);
+
+ pmem[id].num_entries = pmem[id].size / pmem[id].quantum;
+
+ memset(&pmem[id].kobj, 0, sizeof(pmem[0].kobj));
+ pmem[id].kobj.kset = pmem_kset;
+
+ switch (pmem[id].allocator_type) {
+ case PMEM_ALLOCATORTYPE_ALLORNOTHING:
+ pmem[id].allocate = pmem_allocator_all_or_nothing;
+ pmem[id].free = pmem_free_all_or_nothing;
+ pmem[id].free_space = pmem_free_space_all_or_nothing;
+ pmem[id].len = pmem_len_all_or_nothing;
+ pmem[id].start_addr = pmem_start_addr_all_or_nothing;
+ pmem[id].num_entries = 1;
+ pmem[id].quantum = pmem[id].size;
+ pmem[id].allocator.all_or_nothing.allocated = 0;
+
+ if (kobject_init_and_add(&pmem[id].kobj,
+ &pmem_allornothing_ktype, NULL,
+ "%s", pdata->name))
+ goto out_put_kobj;
+
+ break;
+
+ case PMEM_ALLOCATORTYPE_BUDDYBESTFIT:
+ pmem[id].allocator.buddy_bestfit.buddy_bitmap = kmalloc(
+ pmem[id].num_entries * sizeof(struct pmem_bits),
+ GFP_KERNEL);
+ if (!pmem[id].allocator.buddy_bestfit.buddy_bitmap)
+ goto err_reset_pmem_info;
+
+ memset(pmem[id].allocator.buddy_bestfit.buddy_bitmap, 0,
+ sizeof(struct pmem_bits) * pmem[id].num_entries);
+
+ for (i = sizeof(pmem[id].num_entries) * 8 - 1; i >= 0; i--)
+ if ((pmem[id].num_entries) & 1<<i) {
+ PMEM_BUDDY_ORDER(id, index) = i;
+ index = PMEM_BUDDY_NEXT_INDEX(id, index);
+ }
+ pmem[id].allocate = pmem_allocator_buddy_bestfit;
+ pmem[id].free = pmem_free_buddy_bestfit;
+ pmem[id].free_space = pmem_free_space_buddy_bestfit;
+ pmem[id].len = pmem_len_buddy_bestfit;
+ pmem[id].start_addr = pmem_start_addr_buddy_bestfit;
+ if (kobject_init_and_add(&pmem[id].kobj,
+ &pmem_buddy_bestfit_ktype, NULL,
+ "%s", pdata->name))
+ goto out_put_kobj;
+
+ break;
+
+ case PMEM_ALLOCATORTYPE_BITMAP: /* 0, default if not explicit */
+ pmem[id].allocator.bitmap.bitm_alloc = kmalloc(
+ PMEM_INITIAL_NUM_BITMAP_ALLOCATIONS *
+ sizeof(*pmem[id].allocator.bitmap.bitm_alloc),
+ GFP_KERNEL);
+ if (!pmem[id].allocator.bitmap.bitm_alloc) {
+ pr_alert("pmem: %s: Unable to register pmem "
+ "driver %s - can't allocate "
+ "bitm_alloc!\n",
+ __func__, pdata->name);
+ goto err_reset_pmem_info;
+ }
+
+ if (kobject_init_and_add(&pmem[id].kobj,
+ &pmem_bitmap_ktype, NULL,
+ "%s", pdata->name))
+ goto out_put_kobj;
+
+ for (i = 0; i < PMEM_INITIAL_NUM_BITMAP_ALLOCATIONS; i++) {
+ pmem[id].allocator.bitmap.bitm_alloc[i].bit = -1;
+ pmem[id].allocator.bitmap.bitm_alloc[i].quanta = 0;
+ }
+
+ pmem[id].allocator.bitmap.bitmap_allocs =
+ PMEM_INITIAL_NUM_BITMAP_ALLOCATIONS;
+
+ pmem[id].allocator.bitmap.bitmap =
+ kcalloc((pmem[id].num_entries + 31) / 32,
+ sizeof(unsigned int), GFP_KERNEL);
+ if (!pmem[id].allocator.bitmap.bitmap) {
+ pr_alert("pmem: %s: Unable to register pmem "
+ "driver - can't allocate bitmap!\n",
+ __func__);
+ goto err_cant_register_device;
+ }
+ pmem[id].allocator.bitmap.bitmap_free = pmem[id].num_entries;
+
+ pmem[id].allocate = pmem_allocator_bitmap;
+ pmem[id].free = pmem_free_bitmap;
+ pmem[id].free_space = pmem_free_space_bitmap;
+ pmem[id].len = pmem_len_bitmap;
+ pmem[id].start_addr = pmem_start_addr_bitmap;
+
+ DLOG("bitmap allocator id %d (%s), num_entries %u, raw size "
+ "%lu, quanta size %u\n",
+ id, pdata->name, pmem[id].allocator.bitmap.bitmap_free,
+ pmem[id].size, pmem[id].quantum);
+ break;
+
+ case PMEM_ALLOCATORTYPE_SYSTEM:
+
+ INIT_LIST_HEAD(&pmem[id].allocator.system_mem.alist);
+
+ pmem[id].allocator.system_mem.used = 0;
+ pmem[id].vbase = NULL;
+
+ if (kobject_init_and_add(&pmem[id].kobj,
+ &pmem_system_ktype, NULL,
+ "%s", pdata->name))
+ goto out_put_kobj;
+
+ pmem[id].allocate = pmem_allocator_system;
+ pmem[id].free = pmem_free_system;
+ pmem[id].free_space = pmem_free_space_system;
+ pmem[id].len = pmem_len_system;
+ pmem[id].start_addr = pmem_start_addr_system;
+ pmem[id].num_entries = 0;
+ pmem[id].quantum = PAGE_SIZE;
+
+ DLOG("system allocator id %d (%s), raw size %lu\n",
+ id, pdata->name, pmem[id].size);
+ break;
+
+ default:
+ pr_alert("Invalid allocator type (%d) for pmem driver\n",
+ pdata->allocator_type);
+ goto err_reset_pmem_info;
+ }
+
+ pmem[id].ioctl = ioctl;
+ pmem[id].release = release;
+ mutex_init(&pmem[id].arena_mutex);
+ mutex_init(&pmem[id].data_list_mutex);
+ INIT_LIST_HEAD(&pmem[id].data_list);
+
+ pmem[id].dev.name = pdata->name;
+ pmem[id].dev.minor = id;
+ pmem[id].dev.fops = &pmem_fops;
+ pmem[id].reusable = pdata->reusable;
+ pr_info("pmem: Initializing %s as %s\n",
+ pdata->name, pdata->cached ? "cached" : "non-cached");
+
+ if (misc_register(&pmem[id].dev)) {
+ pr_alert("Unable to register pmem driver!\n");
+ goto err_cant_register_device;
+ }
+
+ if (!pmem[id].reusable) {
+ pmem[id].base = allocate_contiguous_memory_nomap(pmem[id].size,
+ pmem[id].memory_type, PAGE_SIZE);
+ if (!pmem[id].base) {
+ pr_err("pmem: Cannot allocate from reserved memory for %s\n",
+ pdata->name);
+ goto err_misc_deregister;
+ }
+ }
+
+ /* reusable pmem requires map on demand */
+ pmem[id].map_on_demand = pdata->map_on_demand || pdata->reusable;
+ if (pmem[id].map_on_demand) {
+ if (pmem[id].reusable) {
+ const struct fmem_data *fmem_info = fmem_get_info();
+ pmem[id].area = fmem_info->area;
+ pmem[id].base = fmem_info->phys;
+ } else {
+ pmem_vma = get_vm_area(pmem[id].size, VM_IOREMAP);
+ if (!pmem_vma) {
+ pr_err("pmem: Failed to allocate virtual space for "
+ "%s\n", pdata->name);
+ goto err_free;
+ }
+ pr_err("pmem: Reserving virtual address range %lx - %lx for"
+ " %s\n", (unsigned long) pmem_vma->addr,
+ (unsigned long) pmem_vma->addr + pmem[id].size,
+ pdata->name);
+ pmem[id].area = pmem_vma;
+ }
+ } else
+ pmem[id].area = NULL;
+
+ page = alloc_page(GFP_KERNEL);
+ if (!page) {
+ pr_err("pmem: Failed to allocate page for %s\n", pdata->name);
+ goto cleanup_vm;
+ }
+ pmem[id].garbage_pfn = page_to_pfn(page);
+ atomic_set(&pmem[id].allocation_cnt, 0);
+
+ if (pdata->setup_region)
+ pmem[id].region_data = pdata->setup_region();
+
+ if (pdata->request_region)
+ pmem[id].mem_request = pdata->request_region;
+
+ if (pdata->release_region)
+ pmem[id].mem_release = pdata->release_region;
+
+ pr_info("allocating %lu bytes at %lx physical for %s\n",
+ pmem[id].size, pmem[id].base, pmem[id].name);
+
+ return 0;
+
+cleanup_vm:
+ if (!pmem[id].reusable)
+ remove_vm_area(pmem_vma);
+err_free:
+ if (!pmem[id].reusable)
+ free_contiguous_memory_by_paddr(pmem[id].base);
+err_misc_deregister:
+ misc_deregister(&pmem[id].dev);
+err_cant_register_device:
+out_put_kobj:
+ kobject_put(&pmem[id].kobj);
+ if (pmem[id].allocator_type == PMEM_ALLOCATORTYPE_BUDDYBESTFIT)
+ kfree(pmem[id].allocator.buddy_bestfit.buddy_bitmap);
+ else if (pmem[id].allocator_type == PMEM_ALLOCATORTYPE_BITMAP) {
+ kfree(pmem[id].allocator.bitmap.bitmap);
+ kfree(pmem[id].allocator.bitmap.bitm_alloc);
+ }
+err_reset_pmem_info:
+ pmem[id].allocate = 0;
+ pmem[id].dev.minor = -1;
+err_no_mem:
+ return -1;
+}
+
+static int pmem_probe(struct platform_device *pdev)
+{
+ struct android_pmem_platform_data *pdata;
+
+ if (!pdev || !pdev->dev.platform_data) {
+ pr_alert("Unable to probe pmem!\n");
+ return -1;
+ }
+ pdata = pdev->dev.platform_data;
+
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
+ return pmem_setup(pdata, NULL, NULL);
+}
+
+static int pmem_remove(struct platform_device *pdev)
+{
+ int id = pdev->id;
+ __free_page(pfn_to_page(pmem[id].garbage_pfn));
+ pm_runtime_disable(&pdev->dev);
+ if (pmem[id].vbase)
+ iounmap(pmem[id].vbase);
+ if (pmem[id].map_on_demand && !pmem[id].reusable && pmem[id].area)
+ free_vm_area(pmem[id].area);
+ if (pmem[id].base)
+ free_contiguous_memory_by_paddr(pmem[id].base);
+ kobject_put(&pmem[id].kobj);
+ if (pmem[id].allocator_type == PMEM_ALLOCATORTYPE_BUDDYBESTFIT)
+ kfree(pmem[id].allocator.buddy_bestfit.buddy_bitmap);
+ else if (pmem[id].allocator_type == PMEM_ALLOCATORTYPE_BITMAP) {
+ kfree(pmem[id].allocator.bitmap.bitmap);
+ kfree(pmem[id].allocator.bitmap.bitm_alloc);
+ }
+ misc_deregister(&pmem[id].dev);
+ return 0;
+}
+
+static int pmem_runtime_suspend(struct device *dev)
+{
+ dev_dbg(dev, "pm_runtime: suspending...\n");
+ return 0;
+}
+
+static int pmem_runtime_resume(struct device *dev)
+{
+ dev_dbg(dev, "pm_runtime: resuming...\n");
+ return 0;
+}
+
+static const struct dev_pm_ops pmem_dev_pm_ops = {
+ .runtime_suspend = pmem_runtime_suspend,
+ .runtime_resume = pmem_runtime_resume,
+};
+
+static struct platform_driver pmem_driver = {
+ .probe = pmem_probe,
+ .remove = pmem_remove,
+ .driver = { .name = "android_pmem",
+ .pm = &pmem_dev_pm_ops,
+ }
+};
+
+
+static int __init pmem_init(void)
+{
+ /* create /sys/kernel/<PMEM_SYSFS_DIR_NAME> directory */
+ pmem_kset = kset_create_and_add(PMEM_SYSFS_DIR_NAME,
+ NULL, kernel_kobj);
+ if (!pmem_kset) {
+ pr_err("pmem(%s):kset_create_and_add fail\n", __func__);
+ return -ENOMEM;
+ }
+
+ return platform_driver_register(&pmem_driver);
+}
+
+static void __exit pmem_exit(void)
+{
+ platform_driver_unregister(&pmem_driver);
+}
+
+module_init(pmem_init);
+module_exit(pmem_exit);
+
diff --git a/include/linux/android_pmem.h b/include/linux/android_pmem.h
new file mode 100644
index 0000000..ab96379
--- /dev/null
+++ b/include/linux/android_pmem.h
@@ -0,0 +1,189 @@
+/* include/linux/android_pmem.h
+ *
+ * Copyright (C) 2007 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _ANDROID_PMEM_H_
+#define _ANDROID_PMEM_H_
+
+#include <linux/fs.h>
+
+#define PMEM_KERNEL_TEST_MAGIC 0xc0
+#define PMEM_KERNEL_TEST_NOMINAL_TEST_IOCTL \
+ _IO(PMEM_KERNEL_TEST_MAGIC, 1)
+#define PMEM_KERNEL_TEST_ADVERSARIAL_TEST_IOCTL \
+ _IO(PMEM_KERNEL_TEST_MAGIC, 2)
+#define PMEM_KERNEL_TEST_HUGE_ALLOCATION_TEST_IOCTL \
+ _IO(PMEM_KERNEL_TEST_MAGIC, 3)
+#define PMEM_KERNEL_TEST_FREE_UNALLOCATED_TEST_IOCTL \
+ _IO(PMEM_KERNEL_TEST_MAGIC, 4)
+#define PMEM_KERNEL_TEST_LARGE_REGION_NUMBER_TEST_IOCTL \
+ _IO(PMEM_KERNEL_TEST_MAGIC, 5)
+
+#define PMEM_IOCTL_MAGIC 'p'
+#define PMEM_GET_PHYS _IOW(PMEM_IOCTL_MAGIC, 1, unsigned int)
+#define PMEM_MAP _IOW(PMEM_IOCTL_MAGIC, 2, unsigned int)
+#define PMEM_GET_SIZE _IOW(PMEM_IOCTL_MAGIC, 3, unsigned int)
+#define PMEM_UNMAP _IOW(PMEM_IOCTL_MAGIC, 4, unsigned int)
+/* This ioctl will allocate pmem space, backing the file, it will fail
+ * if the file already has an allocation, pass it the len as the argument
+ * to the ioctl */
+#define PMEM_ALLOCATE _IOW(PMEM_IOCTL_MAGIC, 5, unsigned int)
+/* This will connect a one pmem file to another, pass the file that is already
+ * backed in memory as the argument to the ioctl
+ */
+#define PMEM_CONNECT _IOW(PMEM_IOCTL_MAGIC, 6, unsigned int)
+/* Returns the total size of the pmem region it is sent to as a pmem_region
+ * struct (with offset set to 0).
+ */
+#define PMEM_GET_TOTAL_SIZE _IOW(PMEM_IOCTL_MAGIC, 7, unsigned int)
+/* Revokes gpu registers and resets the gpu. Pass a pointer to the
+ * start of the mapped gpu regs (the vaddr returned by mmap) as the argument.
+ */
+#define HW3D_REVOKE_GPU _IOW(PMEM_IOCTL_MAGIC, 8, unsigned int)
+#define HW3D_GRANT_GPU _IOW(PMEM_IOCTL_MAGIC, 9, unsigned int)
+#define HW3D_WAIT_FOR_INTERRUPT _IOW(PMEM_IOCTL_MAGIC, 10, unsigned int)
+
+#define PMEM_CLEAN_INV_CACHES _IOW(PMEM_IOCTL_MAGIC, 11, unsigned int)
+#define PMEM_CLEAN_CACHES _IOW(PMEM_IOCTL_MAGIC, 12, unsigned int)
+#define PMEM_INV_CACHES _IOW(PMEM_IOCTL_MAGIC, 13, unsigned int)
+
+#define PMEM_GET_FREE_SPACE _IOW(PMEM_IOCTL_MAGIC, 14, unsigned int)
+#define PMEM_ALLOCATE_ALIGNED _IOW(PMEM_IOCTL_MAGIC, 15, unsigned int)
+struct pmem_region {
+ unsigned long offset;
+ unsigned long len;
+};
+
+struct pmem_addr {
+ unsigned long vaddr;
+ unsigned long offset;
+ unsigned long length;
+};
+
+struct pmem_freespace {
+ unsigned long total;
+ unsigned long largest;
+};
+
+struct pmem_allocation {
+ unsigned long size;
+ unsigned int align;
+};
+
+#ifdef __KERNEL__
+int get_pmem_file(unsigned int fd, unsigned long *start, unsigned long *vstart,
+ unsigned long *end, struct file **filp);
+int get_pmem_fd(int fd, unsigned long *start, unsigned long *end);
+int get_pmem_user_addr(struct file *file, unsigned long *start,
+ unsigned long *end);
+void put_pmem_file(struct file* file);
+void put_pmem_fd(int fd);
+void flush_pmem_fd(int fd, unsigned long start, unsigned long len);
+void flush_pmem_file(struct file *file, unsigned long start, unsigned long len);
+int pmem_cache_maint(struct file *file, unsigned int cmd,
+ struct pmem_addr *pmem_addr);
+
+enum pmem_allocator_type {
+ /* Zero is a default in platform PMEM structures in the board files,
+ * when the "allocator_type" structure element is not explicitly
+ * defined
+ */
+ PMEM_ALLOCATORTYPE_BITMAP = 0, /* forced to be zero here */
+ PMEM_ALLOCATORTYPE_SYSTEM,
+
+ PMEM_ALLOCATORTYPE_ALLORNOTHING,
+ PMEM_ALLOCATORTYPE_BUDDYBESTFIT,
+
+ PMEM_ALLOCATORTYPE_MAX,
+};
+
+#define PMEM_MEMTYPE_MASK 0x7
+#define PMEM_INVALID_MEMTYPE 0x0
+#define PMEM_MEMTYPE_EBI1 0x1
+#define PMEM_MEMTYPE_SMI 0x2
+#define PMEM_MEMTYPE_RESERVED_INVALID2 0x3
+#define PMEM_MEMTYPE_RESERVED_INVALID3 0x4
+#define PMEM_MEMTYPE_RESERVED_INVALID4 0x5
+#define PMEM_MEMTYPE_RESERVED_INVALID5 0x6
+#define PMEM_MEMTYPE_RESERVED_INVALID6 0x7
+
+#define PMEM_ALIGNMENT_MASK 0x18
+#define PMEM_ALIGNMENT_RESERVED_INVALID1 0x0
+#define PMEM_ALIGNMENT_4K 0x8 /* the default */
+#define PMEM_ALIGNMENT_1M 0x10
+#define PMEM_ALIGNMENT_RESERVED_INVALID2 0x18
+
+/* flags in the following function defined as above. */
+int32_t pmem_kalloc(const size_t size, const uint32_t flags);
+int32_t pmem_kfree(const int32_t physaddr);
+
+/* kernel api names for board specific data structures */
+#define PMEM_KERNEL_EBI1_DATA_NAME "pmem_kernel_ebi1"
+#define PMEM_KERNEL_SMI_DATA_NAME "pmem_kernel_smi"
+
+struct android_pmem_platform_data
+{
+ const char* name;
+ /* size of memory region */
+ unsigned long size;
+
+ enum pmem_allocator_type allocator_type;
+ /* treated as a 'hidden' variable in the board files. Can be
+ * set, but default is the system init value of 0 which becomes a
+ * quantum of 4K pages.
+ */
+ unsigned int quantum;
+
+ /* set to indicate maps of this region should be cached, if a mix of
+ * cached and uncached is desired, set this and open the device with
+ * O_SYNC to get an uncached region */
+ unsigned cached;
+ /* The MSM7k has bits to enable a write buffer in the bus controller*/
+ unsigned buffered;
+ /* which memory type (i.e. SMI, EBI1) this PMEM device is backed by */
+ unsigned memory_type;
+ /*
+ * function to be called when the number of allocations goes from
+ * 0 -> 1
+ */
+ int (*request_region)(void *);
+ /*
+ * function to be called when the number of allocations goes from
+ * 1 -> 0
+ */
+ int (*release_region)(void *);
+ /*
+ * function to be called upon pmem registration
+ */
+ void *(*setup_region)(void);
+ /*
+ * indicates that this region should be mapped/unmaped as needed
+ */
+ int map_on_demand;
+ /*
+ * indicates this pmem may be reused via fmem
+ */
+ int reusable;
+};
+
+int pmem_setup(struct android_pmem_platform_data *pdata,
+ long (*ioctl)(struct file *, unsigned int, unsigned long),
+ int (*release)(struct inode *, struct file *));
+
+int pmem_remap(struct pmem_region *region, struct file *file,
+ unsigned operation);
+#endif /* __KERNEL__ */
+
+#endif //_ANDROID_PPP_H_
+
diff --git a/include/linux/fmem.h b/include/linux/fmem.h
new file mode 100644
index 0000000..e4fa82c
--- /dev/null
+++ b/include/linux/fmem.h
@@ -0,0 +1,62 @@
+/*
+ *
+ * Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+#ifndef _FMEM_H_
+#define _FMEM_H_
+
+#include <linux/vmalloc.h>
+
+struct fmem_platform_data {
+ unsigned long phys;
+ unsigned long size;
+ unsigned long reserved_size_low;
+ unsigned long reserved_size_high;
+ unsigned long align;
+};
+
+struct fmem_data {
+ unsigned long phys;
+ void *virt;
+ struct vm_struct *area;
+ unsigned long size;
+ unsigned long reserved_size_low;
+ unsigned long reserved_size_high;
+};
+
+enum fmem_state {
+ FMEM_UNINITIALIZED = 0,
+ FMEM_C_STATE,
+ FMEM_T_STATE,
+ FMEM_O_STATE,
+};
+
+#ifdef CONFIG_QCACHE
+struct fmem_data *fmem_get_info(void);
+int fmem_set_state(enum fmem_state);
+void lock_fmem_state(void);
+void unlock_fmem_state(void);
+void *fmem_map_virtual_area(int cacheability);
+void fmem_unmap_virtual_area(void);
+#else
+static inline struct fmem_data *fmem_get_info(void) { return NULL; }
+static inline int fmem_set_state(enum fmem_state f) { return -ENODEV; }
+static inline void lock_fmem_state(void) { return; }
+static inline void unlock_fmem_state(void) { return; }
+static inline void *fmem_map_virtual_area(int cacheability) { return NULL; }
+static inline void fmem_unmap_virtual_area(void) { return; }
+#endif
+
+int request_fmem_c_region(void *unused);
+int release_fmem_c_region(void *unused);
+#endif
diff --git a/include/linux/memory_alloc.h b/include/linux/memory_alloc.h
new file mode 100644
index 0000000..e7049f8
--- /dev/null
+++ b/include/linux/memory_alloc.h
@@ -0,0 +1,58 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _LINUX_MEMALLOC_H
+#define _LINUX_MEMALLOC_H
+
+#include <linux/mutex.h>
+#include <linux/genalloc.h>
+#include <linux/rbtree.h>
+
+struct mem_pool {
+ struct mutex pool_mutex;
+ struct gen_pool *gpool;
+ unsigned long paddr;
+ unsigned long size;
+ unsigned long free;
+ unsigned int id;
+};
+
+struct alloc {
+ struct rb_node rb_node;
+ void *vaddr;
+ unsigned long paddr;
+ struct mem_pool *mpool;
+ unsigned long len;
+ void *caller;
+};
+
+struct mem_pool *initialize_memory_pool(unsigned long start,
+ unsigned long size, int mem_type);
+
+void *allocate_contiguous_memory(unsigned long size,
+ int mem_type, unsigned long align, int cached);
+
+unsigned long _allocate_contiguous_memory_nomap(unsigned long size,
+ int mem_type, unsigned long align, void *caller);
+
+unsigned long allocate_contiguous_memory_nomap(unsigned long size,
+ int mem_type, unsigned long align);
+
+void free_contiguous_memory(void *addr);
+void free_contiguous_memory_by_paddr(unsigned long paddr);
+
+unsigned long memory_pool_node_paddr(void *vaddr);
+
+unsigned long memory_pool_node_len(void *vaddr);
+
+int memory_pool_init(void);
+#endif /* _LINUX_MEMALLOC_H */
--
1.8.3.2

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