diff options
Diffstat (limited to 'arch/csky')
| -rw-r--r-- | arch/csky/Kconfig | 3 | ||||
| -rw-r--r-- | arch/csky/abiv1/alignment.c | 4 | ||||
| -rw-r--r-- | arch/csky/include/asm/uaccess.h | 16 | ||||
| -rw-r--r-- | arch/csky/kernel/signal.c | 2 | ||||
| -rw-r--r-- | arch/csky/lib/usercopy.c | 8 | ||||
| -rw-r--r-- | arch/csky/mm/dma-mapping.c | 142 | ||||
| -rw-r--r-- | arch/csky/mm/init.c | 4 |
7 files changed, 16 insertions, 163 deletions
diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index cb64f8dacd08..37bed8aadf95 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -7,8 +7,7 @@ config CSKY select COMMON_CLK select CLKSRC_MMIO select CLKSRC_OF - select DMA_DIRECT_OPS - select DMA_NONCOHERENT_OPS + select DMA_DIRECT_REMAP select IRQ_DOMAIN select HANDLE_DOMAIN_IRQ select DW_APB_TIMER_OF diff --git a/arch/csky/abiv1/alignment.c b/arch/csky/abiv1/alignment.c index 60205e98fb87..d789be36eb4f 100644 --- a/arch/csky/abiv1/alignment.c +++ b/arch/csky/abiv1/alignment.c @@ -32,7 +32,7 @@ static int ldb_asm(uint32_t addr, uint32_t *valp) uint32_t val; int err; - if (!access_ok(VERIFY_READ, (void *)addr, 1)) + if (!access_ok((void *)addr, 1)) return 1; asm volatile ( @@ -67,7 +67,7 @@ static int stb_asm(uint32_t addr, uint32_t val) { int err; - if (!access_ok(VERIFY_WRITE, (void *)addr, 1)) + if (!access_ok((void *)addr, 1)) return 1; asm volatile ( diff --git a/arch/csky/include/asm/uaccess.h b/arch/csky/include/asm/uaccess.h index acaf0e210d81..eaa1c3403a42 100644 --- a/arch/csky/include/asm/uaccess.h +++ b/arch/csky/include/asm/uaccess.h @@ -16,10 +16,7 @@ #include <linux/version.h> #include <asm/segment.h> -#define VERIFY_READ 0 -#define VERIFY_WRITE 1 - -static inline int access_ok(int type, const void *addr, unsigned long size) +static inline int access_ok(const void *addr, unsigned long size) { unsigned long limit = current_thread_info()->addr_limit.seg; @@ -27,12 +24,7 @@ static inline int access_ok(int type, const void *addr, unsigned long size) ((unsigned long)(addr + size) < limit)); } -static inline int verify_area(int type, const void *addr, unsigned long size) -{ - return access_ok(type, addr, size) ? 0 : -EFAULT; -} - -#define __addr_ok(addr) (access_ok(VERIFY_READ, addr, 0)) +#define __addr_ok(addr) (access_ok(addr, 0)) extern int __put_user_bad(void); @@ -91,7 +83,7 @@ extern int __put_user_bad(void); long __pu_err = -EFAULT; \ typeof(*(ptr)) *__pu_addr = (ptr); \ typeof(*(ptr)) __pu_val = (typeof(*(ptr)))(x); \ - if (access_ok(VERIFY_WRITE, __pu_addr, size) && __pu_addr) \ + if (access_ok(__pu_addr, size) && __pu_addr) \ __put_user_size(__pu_val, __pu_addr, (size), __pu_err); \ __pu_err; \ }) @@ -217,7 +209,7 @@ do { \ ({ \ int __gu_err = -EFAULT; \ const __typeof__(*(ptr)) __user *__gu_ptr = (ptr); \ - if (access_ok(VERIFY_READ, __gu_ptr, size) && __gu_ptr) \ + if (access_ok(__gu_ptr, size) && __gu_ptr) \ __get_user_size(x, __gu_ptr, size, __gu_err); \ __gu_err; \ }) diff --git a/arch/csky/kernel/signal.c b/arch/csky/kernel/signal.c index 66e1b729b10b..9967c10eee2b 100644 --- a/arch/csky/kernel/signal.c +++ b/arch/csky/kernel/signal.c @@ -88,7 +88,7 @@ do_rt_sigreturn(void) struct pt_regs *regs = current_pt_regs(); struct rt_sigframe *frame = (struct rt_sigframe *)(regs->usp); - if (verify_area(VERIFY_READ, frame, sizeof(*frame))) + if (!access_ok(frame, sizeof(*frame))) goto badframe; if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) goto badframe; diff --git a/arch/csky/lib/usercopy.c b/arch/csky/lib/usercopy.c index ac9170e2cbb8..647a23986fb5 100644 --- a/arch/csky/lib/usercopy.c +++ b/arch/csky/lib/usercopy.c @@ -7,7 +7,7 @@ unsigned long raw_copy_from_user(void *to, const void *from, unsigned long n) { - if (access_ok(VERIFY_READ, from, n)) + if (access_ok(from, n)) __copy_user_zeroing(to, from, n); else memset(to, 0, n); @@ -18,7 +18,7 @@ EXPORT_SYMBOL(raw_copy_from_user); unsigned long raw_copy_to_user(void *to, const void *from, unsigned long n) { - if (access_ok(VERIFY_WRITE, to, n)) + if (access_ok(to, n)) __copy_user(to, from, n); return n; } @@ -113,7 +113,7 @@ long strncpy_from_user(char *dst, const char *src, long count) { long res = -EFAULT; - if (access_ok(VERIFY_READ, src, 1)) + if (access_ok(src, 1)) __do_strncpy_from_user(dst, src, count, res); return res; } @@ -236,7 +236,7 @@ do { \ unsigned long clear_user(void __user *to, unsigned long n) { - if (access_ok(VERIFY_WRITE, to, n)) + if (access_ok(to, n)) __do_clear_user(to, n); return n; } diff --git a/arch/csky/mm/dma-mapping.c b/arch/csky/mm/dma-mapping.c index 85437b21e045..80783bb71c5c 100644 --- a/arch/csky/mm/dma-mapping.c +++ b/arch/csky/mm/dma-mapping.c @@ -14,73 +14,13 @@ #include <linux/version.h> #include <asm/cache.h> -static struct gen_pool *atomic_pool; -static size_t atomic_pool_size __initdata = SZ_256K; - -static int __init early_coherent_pool(char *p) -{ - atomic_pool_size = memparse(p, &p); - return 0; -} -early_param("coherent_pool", early_coherent_pool); - static int __init atomic_pool_init(void) { - struct page *page; - size_t size = atomic_pool_size; - void *ptr; - int ret; - - atomic_pool = gen_pool_create(PAGE_SHIFT, -1); - if (!atomic_pool) - BUG(); - - page = alloc_pages(GFP_KERNEL | GFP_DMA, get_order(size)); - if (!page) - BUG(); - - ptr = dma_common_contiguous_remap(page, size, VM_ALLOC, - pgprot_noncached(PAGE_KERNEL), - __builtin_return_address(0)); - if (!ptr) - BUG(); - - ret = gen_pool_add_virt(atomic_pool, (unsigned long)ptr, - page_to_phys(page), atomic_pool_size, -1); - if (ret) - BUG(); - - gen_pool_set_algo(atomic_pool, gen_pool_first_fit_order_align, NULL); - - pr_info("DMA: preallocated %zu KiB pool for atomic coherent pool\n", - atomic_pool_size / 1024); - - pr_info("DMA: vaddr: 0x%x phy: 0x%lx,\n", (unsigned int)ptr, - page_to_phys(page)); - - return 0; + return dma_atomic_pool_init(GFP_KERNEL, pgprot_noncached(PAGE_KERNEL)); } postcore_initcall(atomic_pool_init); -static void *csky_dma_alloc_atomic(struct device *dev, size_t size, - dma_addr_t *dma_handle) -{ - unsigned long addr; - - addr = gen_pool_alloc(atomic_pool, size); - if (addr) - *dma_handle = gen_pool_virt_to_phys(atomic_pool, addr); - - return (void *)addr; -} - -static void csky_dma_free_atomic(struct device *dev, size_t size, void *vaddr, - dma_addr_t dma_handle, unsigned long attrs) -{ - gen_pool_free(atomic_pool, (unsigned long)vaddr, size); -} - -static void __dma_clear_buffer(struct page *page, size_t size) +void arch_dma_prep_coherent(struct page *page, size_t size) { if (PageHighMem(page)) { unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT; @@ -107,84 +47,6 @@ static void __dma_clear_buffer(struct page *page, size_t size) } } -static void *csky_dma_alloc_nonatomic(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, - unsigned long attrs) -{ - void *vaddr; - struct page *page; - unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT; - - if (DMA_ATTR_NON_CONSISTENT & attrs) { - pr_err("csky %s can't support DMA_ATTR_NON_CONSISTENT.\n", __func__); - return NULL; - } - - if (IS_ENABLED(CONFIG_DMA_CMA)) - page = dma_alloc_from_contiguous(dev, count, get_order(size), - gfp); - else - page = alloc_pages(gfp, get_order(size)); - - if (!page) { - pr_err("csky %s no more free pages.\n", __func__); - return NULL; - } - - *dma_handle = page_to_phys(page); - - __dma_clear_buffer(page, size); - - if (attrs & DMA_ATTR_NO_KERNEL_MAPPING) - return page; - - vaddr = dma_common_contiguous_remap(page, PAGE_ALIGN(size), VM_USERMAP, - pgprot_noncached(PAGE_KERNEL), __builtin_return_address(0)); - if (!vaddr) - BUG(); - - return vaddr; -} - -static void csky_dma_free_nonatomic( - struct device *dev, - size_t size, - void *vaddr, - dma_addr_t dma_handle, - unsigned long attrs - ) -{ - struct page *page = phys_to_page(dma_handle); - unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT; - - if ((unsigned int)vaddr >= VMALLOC_START) - dma_common_free_remap(vaddr, size, VM_USERMAP); - - if (IS_ENABLED(CONFIG_DMA_CMA)) - dma_release_from_contiguous(dev, page, count); - else - __free_pages(page, get_order(size)); -} - -void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, - gfp_t gfp, unsigned long attrs) -{ - if (gfpflags_allow_blocking(gfp)) - return csky_dma_alloc_nonatomic(dev, size, dma_handle, gfp, - attrs); - else - return csky_dma_alloc_atomic(dev, size, dma_handle); -} - -void arch_dma_free(struct device *dev, size_t size, void *vaddr, - dma_addr_t dma_handle, unsigned long attrs) -{ - if (!addr_in_gen_pool(atomic_pool, (unsigned int) vaddr, size)) - csky_dma_free_nonatomic(dev, size, vaddr, dma_handle, attrs); - else - csky_dma_free_atomic(dev, size, vaddr, dma_handle, attrs); -} - static inline void cache_op(phys_addr_t paddr, size_t size, void (*fn)(unsigned long start, unsigned long end)) { diff --git a/arch/csky/mm/init.c b/arch/csky/mm/init.c index dc07c078f9b8..66e597053488 100644 --- a/arch/csky/mm/init.c +++ b/arch/csky/mm/init.c @@ -71,7 +71,7 @@ void free_initrd_mem(unsigned long start, unsigned long end) ClearPageReserved(virt_to_page(start)); init_page_count(virt_to_page(start)); free_page(start); - totalram_pages++; + totalram_pages_inc(); } } #endif @@ -88,7 +88,7 @@ void free_initmem(void) ClearPageReserved(virt_to_page(addr)); init_page_count(virt_to_page(addr)); free_page(addr); - totalram_pages++; + totalram_pages_inc(); addr += PAGE_SIZE; } |