From b22da3d8526a935aa31e086e63f60ff3246cb61c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 07:24:11 +0000
Subject: [PATCH] add stmac read mac form eeprom
---
kernel/arch/arm64/mm/dma-mapping.c | 1139 +----------------------------------------------------------
1 files changed, 36 insertions(+), 1,103 deletions(-)
diff --git a/kernel/arch/arm64/mm/dma-mapping.c b/kernel/arch/arm64/mm/dma-mapping.c
index 3edcbd0..2ee4895 100644
--- a/kernel/arch/arm64/mm/dma-mapping.c
+++ b/kernel/arch/arm64/mm/dma-mapping.c
@@ -1,1139 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
- * SWIOTLB-based DMA API implementation
- *
* Copyright (C) 2012 ARM Ltd.
* Author: Catalin Marinas <catalin.marinas@arm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/gfp.h>
-#include <linux/acpi.h>
-#include <linux/bootmem.h>
#include <linux/cache.h>
-#include <linux/export.h>
-#include <linux/slab.h>
-#include <linux/genalloc.h>
-#include <linux/dma-direct.h>
-#include <linux/dma-contiguous.h>
-#include <linux/mm.h>
-#include <linux/iommu.h>
-#include <linux/vmalloc.h>
-#include <linux/swiotlb.h>
-#include <linux/dma-removed.h>
-#include <linux/pci.h>
-#include <linux/io.h>
+#include <linux/dma-map-ops.h>
+#include <linux/dma-iommu.h>
+#include <xen/xen.h>
+#include <xen/swiotlb-xen.h>
+#include <trace/hooks/iommu.h>
+#include <trace/hooks/dma_noalias.h>
#include <asm/cacheflush.h>
-#include <asm/tlbflush.h>
-#include <asm/dma-iommu.h>
-#include <linux/of_address.h>
-#include <linux/dma-mapping-fast.h>
-static int swiotlb __ro_after_init;
-
-static pgprot_t __get_dma_pgprot(unsigned long attrs, pgprot_t prot,
- bool coherent)
+void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
+ enum dma_data_direction dir)
{
- if (!coherent || (attrs & DMA_ATTR_WRITE_COMBINE))
- return pgprot_writecombine(prot);
- return prot;
+ __dma_map_area(phys_to_virt(paddr), size, dir);
}
-static bool is_dma_coherent(struct device *dev, unsigned long attrs)
+void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
+ enum dma_data_direction dir)
{
-
- if (attrs & DMA_ATTR_FORCE_COHERENT)
- return true;
- else if (attrs & DMA_ATTR_FORCE_NON_COHERENT)
- return false;
- else if (is_device_dma_coherent(dev))
- return true;
- else
- return false;
-}
-static struct gen_pool *atomic_pool __ro_after_init;
-
-#define DEFAULT_DMA_COHERENT_POOL_SIZE SZ_256K
-static size_t atomic_pool_size __initdata = DEFAULT_DMA_COHERENT_POOL_SIZE;
-
-static int __init early_coherent_pool(char *p)
-{
- atomic_pool_size = memparse(p, &p);
- return 0;
-}
-early_param("coherent_pool", early_coherent_pool);
-
-static void *__alloc_from_pool(size_t size, struct page **ret_page, gfp_t flags)
-{
- unsigned long val;
- void *ptr = NULL;
-
- if (!atomic_pool) {
- WARN(1, "coherent pool not initialised!\n");
- return NULL;
- }
-
- val = gen_pool_alloc(atomic_pool, size);
- if (val) {
- phys_addr_t phys = gen_pool_virt_to_phys(atomic_pool, val);
-
- *ret_page = phys_to_page(phys);
- ptr = (void *)val;
- memset(ptr, 0, size);
- }
-
- return ptr;
+ __dma_unmap_area(phys_to_virt(paddr), size, dir);
}
-static bool __in_atomic_pool(void *start, size_t size)
+void arch_dma_prep_coherent(struct page *page, size_t size)
{
- return addr_in_gen_pool(atomic_pool, (unsigned long)start, size);
+ __dma_flush_area(page_address(page), size);
}
-
-static int __free_from_pool(void *start, size_t size)
-{
- if (!__in_atomic_pool(start, size))
- return 0;
-
- gen_pool_free(atomic_pool, (unsigned long)start, size);
-
- return 1;
-}
-
-static void *__dma_alloc(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flags,
- unsigned long attrs)
-{
- struct page *page;
- void *ptr, *coherent_ptr;
- bool coherent = is_dma_coherent(dev, attrs);
- pgprot_t prot = __get_dma_pgprot(attrs, PAGE_KERNEL, false);
-
- size = PAGE_ALIGN(size);
-
- if (!coherent && !gfpflags_allow_blocking(flags)) {
- struct page *page = NULL;
- void *addr = __alloc_from_pool(size, &page, flags);
-
- if (addr)
- *dma_handle = phys_to_dma(dev, page_to_phys(page));
-
- return addr;
- }
-
- ptr = swiotlb_alloc(dev, size, dma_handle, flags, attrs);
-
- if (!ptr)
- goto no_mem;
-
- /* no need for non-cacheable mapping if coherent */
- if (coherent)
- return ptr;
-
- /* remove any dirty cache lines on the kernel alias */
- __dma_flush_area(ptr, size);
-
- /* create a coherent mapping */
- page = virt_to_page(ptr);
- coherent_ptr = dma_common_contiguous_remap(page, size, VM_USERMAP,
- prot, __builtin_return_address(0));
- if (!coherent_ptr)
- goto no_map;
-
- return coherent_ptr;
-
-no_map:
- swiotlb_free(dev, size, ptr, *dma_handle, attrs);
-no_mem:
- return NULL;
-}
-
-static void __dma_free(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle,
- unsigned long attrs)
-{
- void *swiotlb_addr = phys_to_virt(dma_to_phys(dev, dma_handle));
-
- size = PAGE_ALIGN(size);
-
- if (!is_device_dma_coherent(dev)) {
- if (__free_from_pool(vaddr, size))
- return;
- vunmap(vaddr);
- }
- swiotlb_free(dev, size, swiotlb_addr, dma_handle, attrs);
-}
-
-static dma_addr_t __swiotlb_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
- dma_addr_t dev_addr;
-
- dev_addr = swiotlb_map_page(dev, page, offset, size, dir, attrs);
- if (!is_dma_coherent(dev, attrs) &&
- (attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
- __dma_map_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);
-
- return dev_addr;
-}
-
-
-static void __swiotlb_unmap_page(struct device *dev, dma_addr_t dev_addr,
- size_t size, enum dma_data_direction dir,
- unsigned long attrs)
-{
- if (!is_dma_coherent(dev, attrs) &&
- (attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
- __dma_unmap_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);
- swiotlb_unmap_page(dev, dev_addr, size, dir, attrs);
-}
-
-static int __swiotlb_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
- int nelems, enum dma_data_direction dir,
- unsigned long attrs)
-{
- struct scatterlist *sg;
- int i, ret;
-
- ret = swiotlb_map_sg_attrs(dev, sgl, nelems, dir, attrs);
- if (!is_dma_coherent(dev, attrs) &&
- (attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
- for_each_sg(sgl, sg, ret, i)
- __dma_map_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)),
- sg->length, dir);
-
- return ret;
-}
-
-static void __swiotlb_unmap_sg_attrs(struct device *dev,
- struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
- struct scatterlist *sg;
- int i;
-
- if (!is_dma_coherent(dev, attrs) &&
- (attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
- for_each_sg(sgl, sg, nelems, i)
- __dma_unmap_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)),
- sg->length, dir);
- swiotlb_unmap_sg_attrs(dev, sgl, nelems, dir, attrs);
-}
-
-static void __swiotlb_sync_single_for_cpu(struct device *dev,
- dma_addr_t dev_addr, size_t size,
- enum dma_data_direction dir)
-{
- if (!is_device_dma_coherent(dev))
- __dma_unmap_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);
- swiotlb_sync_single_for_cpu(dev, dev_addr, size, dir);
-}
-
-static void __swiotlb_sync_single_for_device(struct device *dev,
- dma_addr_t dev_addr, size_t size,
- enum dma_data_direction dir)
-{
- swiotlb_sync_single_for_device(dev, dev_addr, size, dir);
- if (!is_device_dma_coherent(dev))
- __dma_map_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);
-}
-
-static void __swiotlb_sync_sg_for_cpu(struct device *dev,
- struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir)
-{
- struct scatterlist *sg;
- int i;
-
- if (!is_device_dma_coherent(dev))
- for_each_sg(sgl, sg, nelems, i)
- __dma_unmap_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)),
- sg->length, dir);
- swiotlb_sync_sg_for_cpu(dev, sgl, nelems, dir);
-}
-
-static void __swiotlb_sync_sg_for_device(struct device *dev,
- struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir)
-{
- struct scatterlist *sg;
- int i;
-
- swiotlb_sync_sg_for_device(dev, sgl, nelems, dir);
- if (!is_device_dma_coherent(dev))
- for_each_sg(sgl, sg, nelems, i)
- __dma_map_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)),
- sg->length, dir);
-}
-
-static int __swiotlb_mmap_pfn(struct vm_area_struct *vma,
- unsigned long pfn, size_t size)
-{
- int ret = -ENXIO;
- unsigned long nr_vma_pages = vma_pages(vma);
- unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
- unsigned long off = vma->vm_pgoff;
-
- if (off < nr_pages && nr_vma_pages <= (nr_pages - off)) {
- ret = remap_pfn_range(vma, vma->vm_start,
- pfn + off,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot);
- }
-
- return ret;
-}
-
-static int __swiotlb_mmap(struct device *dev,
- struct vm_area_struct *vma,
- void *cpu_addr, dma_addr_t dma_addr, size_t size,
- unsigned long attrs)
-{
- int ret = -ENXIO;
- unsigned long pfn = dma_to_phys(dev, dma_addr) >> PAGE_SHIFT;
-
- vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot,
- is_dma_coherent(dev, attrs));
-
- if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret))
- return ret;
-
- return __swiotlb_mmap_pfn(vma, pfn, size);
-}
-
-static int __swiotlb_get_sgtable_page(struct sg_table *sgt,
- struct page *page, size_t size)
-{
- int ret = sg_alloc_table(sgt, 1, GFP_KERNEL);
-
- if (!ret)
- sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0);
-
- return ret;
-}
-
-static int __swiotlb_get_sgtable(struct device *dev, struct sg_table *sgt,
- void *cpu_addr, dma_addr_t handle, size_t size,
- unsigned long attrs)
-{
- struct page *page = phys_to_page(dma_to_phys(dev, handle));
-
- return __swiotlb_get_sgtable_page(sgt, page, size);
-}
-
-static int __swiotlb_dma_supported(struct device *hwdev, u64 mask)
-{
- if (swiotlb)
- return swiotlb_dma_supported(hwdev, mask);
- return 1;
-}
-
-static void *arm64_dma_remap(struct device *dev, void *cpu_addr,
- dma_addr_t handle, size_t size,
- unsigned long attrs)
-{
- struct page *page = phys_to_page(dma_to_phys(dev, handle));
- bool coherent = is_device_dma_coherent(dev);
- pgprot_t prot = __get_dma_pgprot(attrs, PAGE_KERNEL, coherent);
- unsigned long offset = handle & ~PAGE_MASK;
- struct vm_struct *area;
- unsigned long addr;
-
- size = PAGE_ALIGN(size + offset);
-
- /*
- * DMA allocation can be mapped to user space, so lets
- * set VM_USERMAP flags too.
- */
- area = get_vm_area(size, VM_USERMAP);
- if (!area)
- return NULL;
-
- addr = (unsigned long)area->addr;
- area->phys_addr = __pfn_to_phys(page_to_pfn(page));
-
- if (ioremap_page_range(addr, addr + size, area->phys_addr, prot)) {
- vunmap((void *)addr);
- return NULL;
- }
- return (void *)addr + offset;
-}
-
-static void arm64_dma_unremap(struct device *dev, void *remapped_addr,
- size_t size)
-{
- struct vm_struct *area;
-
- size = PAGE_ALIGN(size);
- remapped_addr = (void *)((unsigned long)remapped_addr & PAGE_MASK);
-
- area = find_vm_area(remapped_addr);
- if (!area) {
- WARN(1, "trying to free invalid coherent area: %pK\n",
- remapped_addr);
- return;
- }
- vunmap(remapped_addr);
- flush_tlb_kernel_range((unsigned long)remapped_addr,
- (unsigned long)(remapped_addr + size));
-}
-
-static int __swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t addr)
-{
- if (swiotlb)
- return swiotlb_dma_mapping_error(hwdev, addr);
- return 0;
-}
-
-static const struct dma_map_ops arm64_swiotlb_dma_ops = {
- .alloc = __dma_alloc,
- .free = __dma_free,
- .mmap = __swiotlb_mmap,
- .get_sgtable = __swiotlb_get_sgtable,
- .map_page = __swiotlb_map_page,
- .unmap_page = __swiotlb_unmap_page,
- .map_sg = __swiotlb_map_sg_attrs,
- .unmap_sg = __swiotlb_unmap_sg_attrs,
- .sync_single_for_cpu = __swiotlb_sync_single_for_cpu,
- .sync_single_for_device = __swiotlb_sync_single_for_device,
- .sync_sg_for_cpu = __swiotlb_sync_sg_for_cpu,
- .sync_sg_for_device = __swiotlb_sync_sg_for_device,
- .dma_supported = __swiotlb_dma_supported,
- .mapping_error = __swiotlb_dma_mapping_error,
- .remap = arm64_dma_remap,
- .unremap = arm64_dma_unremap,
-};
-
-static int __init atomic_pool_init(void)
-{
- pgprot_t prot = __pgprot(PROT_NORMAL_NC);
- unsigned long nr_pages = atomic_pool_size >> PAGE_SHIFT;
- struct page *page;
- void *addr;
- unsigned int pool_size_order = get_order(atomic_pool_size);
-
- if (dev_get_cma_area(NULL))
- page = dma_alloc_from_contiguous(NULL, nr_pages,
- pool_size_order, false);
- else
- page = alloc_pages(GFP_DMA32, pool_size_order);
-
- if (page) {
- int ret;
- void *page_addr = page_address(page);
-
- memset(page_addr, 0, atomic_pool_size);
- __dma_flush_area(page_addr, atomic_pool_size);
-
- atomic_pool = gen_pool_create(PAGE_SHIFT, -1);
- if (!atomic_pool)
- goto free_page;
-
- addr = dma_common_contiguous_remap(page, atomic_pool_size,
- VM_USERMAP, prot, atomic_pool_init);
-
- if (!addr)
- goto destroy_genpool;
-
- ret = gen_pool_add_virt(atomic_pool, (unsigned long)addr,
- page_to_phys(page),
- atomic_pool_size, -1);
- if (ret)
- goto remove_mapping;
-
- gen_pool_set_algo(atomic_pool,
- gen_pool_first_fit_order_align,
- NULL);
-
- pr_info("DMA: preallocated %zu KiB pool for atomic allocations\n",
- atomic_pool_size / 1024);
- return 0;
- }
- goto out;
-
-remove_mapping:
- dma_common_free_remap(addr, atomic_pool_size, VM_USERMAP, false);
-destroy_genpool:
- gen_pool_destroy(atomic_pool);
- atomic_pool = NULL;
-free_page:
- if (!dma_release_from_contiguous(NULL, page, nr_pages))
- __free_pages(page, pool_size_order);
-out:
- pr_err("DMA: failed to allocate %zu KiB pool for atomic coherent allocation\n",
- atomic_pool_size / 1024);
- return -ENOMEM;
-}
-
-/********************************************
- * The following APIs are for dummy DMA ops *
- ********************************************/
-
-static void *__dummy_alloc(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flags,
- unsigned long attrs)
-{
- WARN(1, "dma alloc failure, device may be missing a call to arch_setup_dma_ops");
- return NULL;
-}
-
-static void __dummy_free(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle,
- unsigned long attrs)
-{
-}
-
-static int __dummy_mmap(struct device *dev,
- struct vm_area_struct *vma,
- void *cpu_addr, dma_addr_t dma_addr, size_t size,
- unsigned long attrs)
-{
- return -ENXIO;
-}
-
-static dma_addr_t __dummy_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
- return 0;
-}
-
-static void __dummy_unmap_page(struct device *dev, dma_addr_t dev_addr,
- size_t size, enum dma_data_direction dir,
- unsigned long attrs)
-{
-}
-
-static int __dummy_map_sg(struct device *dev, struct scatterlist *sgl,
- int nelems, enum dma_data_direction dir,
- unsigned long attrs)
-{
- return 0;
-}
-
-static void __dummy_unmap_sg(struct device *dev,
- struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
-}
-
-static void __dummy_sync_single(struct device *dev,
- dma_addr_t dev_addr, size_t size,
- enum dma_data_direction dir)
-{
-}
-
-static void __dummy_sync_sg(struct device *dev,
- struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir)
-{
-}
-
-static int __dummy_mapping_error(struct device *hwdev, dma_addr_t dma_addr)
-{
- return 1;
-}
-
-static int __dummy_dma_supported(struct device *hwdev, u64 mask)
-{
- return 0;
-}
-
-const struct dma_map_ops dummy_dma_ops = {
- .alloc = __dummy_alloc,
- .free = __dummy_free,
- .mmap = __dummy_mmap,
- .map_page = __dummy_map_page,
- .unmap_page = __dummy_unmap_page,
- .map_sg = __dummy_map_sg,
- .unmap_sg = __dummy_unmap_sg,
- .sync_single_for_cpu = __dummy_sync_single,
- .sync_single_for_device = __dummy_sync_single,
- .sync_sg_for_cpu = __dummy_sync_sg,
- .sync_sg_for_device = __dummy_sync_sg,
- .mapping_error = __dummy_mapping_error,
- .dma_supported = __dummy_dma_supported,
-};
-EXPORT_SYMBOL(dummy_dma_ops);
-
-static int __init arm64_dma_init(void)
-{
- if (swiotlb_force == SWIOTLB_FORCE ||
- max_pfn > (arm64_dma_phys_limit >> PAGE_SHIFT))
- swiotlb = 1;
-
- WARN_TAINT(ARCH_DMA_MINALIGN < cache_line_size(),
- TAINT_CPU_OUT_OF_SPEC,
- "ARCH_DMA_MINALIGN smaller than CTR_EL0.CWG (%d < %d)",
- ARCH_DMA_MINALIGN, cache_line_size());
-
- return atomic_pool_init();
-}
-arch_initcall(arm64_dma_init);
#ifdef CONFIG_IOMMU_DMA
-#include <linux/dma-iommu.h>
-#include <linux/platform_device.h>
-#include <linux/amba/bus.h>
-
-/* Thankfully, all cache ops are by VA so we can ignore phys here */
-static void flush_page(struct device *dev, const void *virt, phys_addr_t phys)
-{
- __dma_flush_area(virt, PAGE_SIZE);
-}
-
-static void *__iommu_alloc_attrs(struct device *dev, size_t size,
- dma_addr_t *handle, gfp_t gfp,
- unsigned long attrs)
-{
- bool coherent = is_dma_coherent(dev, attrs);
- int ioprot = dma_info_to_prot(DMA_BIDIRECTIONAL, coherent, attrs);
- size_t iosize = size;
- void *addr;
-
- if (WARN(!dev, "cannot create IOMMU mapping for unknown device\n"))
- return NULL;
-
- size = PAGE_ALIGN(size);
-
- /*
- * Some drivers rely on this, and we probably don't want the
- * possibility of stale kernel data being read by devices anyway.
- */
- if (!(attrs & DMA_ATTR_SKIP_ZEROING))
- gfp |= __GFP_ZERO;
-
- if (!gfpflags_allow_blocking(gfp)) {
- struct page *page;
- /*
- * In atomic context we can't remap anything, so we'll only
- * get the virtually contiguous buffer we need by way of a
- * physically contiguous allocation.
- */
- if (coherent) {
- page = alloc_pages(gfp, get_order(size));
- addr = page ? page_address(page) : NULL;
- } else {
- addr = __alloc_from_pool(size, &page, gfp);
- }
- if (!addr)
- return NULL;
-
- *handle = iommu_dma_map_page(dev, page, 0, iosize, ioprot);
- if (iommu_dma_mapping_error(dev, *handle)) {
- if (coherent)
- __free_pages(page, get_order(size));
- else
- __free_from_pool(addr, size);
- addr = NULL;
- }
- } else if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
- pgprot_t prot = __get_dma_pgprot(attrs, PAGE_KERNEL, coherent);
- struct page *page;
-
- page = dma_alloc_from_contiguous(dev, size >> PAGE_SHIFT,
- get_order(size), gfp & __GFP_NOWARN);
- if (!page)
- return NULL;
-
- *handle = iommu_dma_map_page(dev, page, 0, iosize, ioprot);
- if (iommu_dma_mapping_error(dev, *handle)) {
- dma_release_from_contiguous(dev, page,
- size >> PAGE_SHIFT);
- return NULL;
- }
- addr = dma_common_contiguous_remap(page, size, VM_USERMAP,
- prot,
- __builtin_return_address(0));
- if (addr) {
- if (!coherent)
- __dma_flush_area(page_to_virt(page), iosize);
- memset(addr, 0, size);
- } else {
- iommu_dma_unmap_page(dev, *handle, iosize, 0, attrs);
- dma_release_from_contiguous(dev, page,
- size >> PAGE_SHIFT);
- }
- } else {
- pgprot_t prot = __get_dma_pgprot(attrs, PAGE_KERNEL, coherent);
- struct page **pages;
-
- pages = iommu_dma_alloc(dev, iosize, gfp, attrs, ioprot,
- handle, flush_page);
- if (!pages)
- return NULL;
-
- addr = dma_common_pages_remap(pages, size, VM_USERMAP, prot,
- __builtin_return_address(0));
- if (!addr)
- iommu_dma_free(dev, pages, iosize, handle);
- }
- return addr;
-}
-
-static void __iommu_free_attrs(struct device *dev, size_t size, void *cpu_addr,
- dma_addr_t handle, unsigned long attrs)
-{
- size_t iosize = size;
-
- size = PAGE_ALIGN(size);
- /*
- * @cpu_addr will be one of 4 things depending on how it was allocated:
- * - A remapped array of pages for contiguous allocations.
- * - A remapped array of pages from iommu_dma_alloc(), for all
- * non-atomic allocations.
- * - A non-cacheable alias from the atomic pool, for atomic
- * allocations by non-coherent devices.
- * - A normal lowmem address, for atomic allocations by
- * coherent devices.
- * Hence how dodgy the below logic looks...
- */
- if (__in_atomic_pool(cpu_addr, size)) {
- iommu_dma_unmap_page(dev, handle, iosize, 0, 0);
- __free_from_pool(cpu_addr, size);
- } else if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
- struct page *page = vmalloc_to_page(cpu_addr);
- iommu_dma_unmap_page(dev, handle, iosize, 0, attrs);
- dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT);
- dma_common_free_remap(cpu_addr, size, VM_USERMAP, false);
- } else if (is_vmalloc_addr(cpu_addr)) {
- struct vm_struct *area = find_vm_area(cpu_addr);
-
- if (WARN_ON(!area || !area->pages))
- return;
- iommu_dma_free(dev, area->pages, iosize, &handle);
- dma_common_free_remap(cpu_addr, size, VM_USERMAP, false);
- } else {
- iommu_dma_unmap_page(dev, handle, iosize, 0, 0);
- __free_pages(virt_to_page(cpu_addr), get_order(size));
- }
-}
-
-static int __iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
- void *cpu_addr, dma_addr_t dma_addr, size_t size,
- unsigned long attrs)
-{
- struct vm_struct *area;
- int ret;
- unsigned long pfn = 0;
-
- vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot,
- is_dma_coherent(dev, attrs));
-
- if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret))
- return ret;
-
- area = find_vm_area(cpu_addr);
-
- if (area && area->pages)
- return iommu_dma_mmap(area->pages, size, vma);
- else if (!is_vmalloc_addr(cpu_addr))
- pfn = page_to_pfn(virt_to_page(cpu_addr));
- else if (is_vmalloc_addr(cpu_addr))
- /*
- * DMA_ATTR_FORCE_CONTIGUOUS and atomic pool allocations are
- * always remapped, hence in the vmalloc space.
- */
- pfn = vmalloc_to_pfn(cpu_addr);
-
- if (pfn)
- return __swiotlb_mmap_pfn(vma, pfn, size);
-
- return -ENXIO;
-}
-
-static int __iommu_get_sgtable(struct device *dev, struct sg_table *sgt,
- void *cpu_addr, dma_addr_t dma_addr,
- size_t size, unsigned long attrs)
-{
- unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
- struct page *page = NULL;
- struct vm_struct *area = find_vm_area(cpu_addr);
-
- if (area && area->pages)
- return sg_alloc_table_from_pages(sgt, area->pages, count, 0,
- size, GFP_KERNEL);
- else if (!is_vmalloc_addr(cpu_addr))
- page = virt_to_page(cpu_addr);
- else if (is_vmalloc_addr(cpu_addr))
- /*
- * DMA_ATTR_FORCE_CONTIGUOUS and atomic pool allocations
- * are always remapped, hence in the vmalloc space.
- */
- page = vmalloc_to_page(cpu_addr);
-
- if (page)
- return __swiotlb_get_sgtable_page(sgt, page, size);
- return -ENXIO;
-}
-
-static void __iommu_sync_single_for_cpu(struct device *dev,
- dma_addr_t dev_addr, size_t size,
- enum dma_data_direction dir)
-{
- phys_addr_t phys;
- struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
-
- if (!domain || iommu_is_iova_coherent(domain, dev_addr))
- return;
- if (is_device_dma_coherent(dev))
- return;
- phys = iommu_iova_to_phys(domain, dev_addr);
- __dma_unmap_area(phys_to_virt(phys), size, dir);
-}
-
-static void __iommu_sync_single_for_device(struct device *dev,
- dma_addr_t dev_addr, size_t size,
- enum dma_data_direction dir)
-{
- phys_addr_t phys;
- struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
-
- if (!domain || iommu_is_iova_coherent(domain, dev_addr))
- return;
- if (is_device_dma_coherent(dev))
- return;
- phys = iommu_iova_to_phys(domain, dev_addr);
- __dma_map_area(phys_to_virt(phys), size, dir);
-}
-
-static dma_addr_t __iommu_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
- bool coherent = is_dma_coherent(dev, attrs);
- int prot = dma_info_to_prot(dir, coherent, attrs);
- dma_addr_t dev_addr = iommu_dma_map_page(dev, page, offset, size, prot);
-
- if (!iommu_dma_mapping_error(dev, dev_addr) &&
- (attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
- __iommu_sync_single_for_device(dev, dev_addr, size, dir);
-
- return dev_addr;
-}
-
-static void __iommu_unmap_page(struct device *dev, dma_addr_t dev_addr,
- size_t size, enum dma_data_direction dir,
- unsigned long attrs)
-{
- if ((attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
- __iommu_sync_single_for_cpu(dev, dev_addr, size, dir);
-
- iommu_dma_unmap_page(dev, dev_addr, size, dir, attrs);
-}
-
-static void __iommu_sync_sg_for_cpu(struct device *dev,
- struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir)
-{
- struct scatterlist *sg;
- dma_addr_t iova = sg_dma_address(sgl);
- struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
- int i;
-
- if (!domain || iommu_is_iova_coherent(domain, iova))
- return;
- if (is_device_dma_coherent(dev))
- return;
- for_each_sg(sgl, sg, nelems, i)
- __dma_unmap_area(sg_virt(sg), sg->length, dir);
-}
-
-static void __iommu_sync_sg_for_device(struct device *dev,
- struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir)
-{
- struct scatterlist *sg;
- dma_addr_t iova = sg_dma_address(sgl);
- struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
- int i;
-
- if (!domain || iommu_is_iova_coherent(domain, iova))
- return;
- if (is_device_dma_coherent(dev))
- return;
- for_each_sg(sgl, sg, nelems, i)
- __dma_map_area(sg_virt(sg), sg->length, dir);
-}
-
-static int __iommu_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
- int nelems, enum dma_data_direction dir,
- unsigned long attrs)
-{
- bool coherent = is_device_dma_coherent(dev);
-
- if ((attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
- __iommu_sync_sg_for_device(dev, sgl, nelems, dir);
-
- return iommu_dma_map_sg(dev, sgl, nelems,
- dma_info_to_prot(dir, coherent, attrs));
-}
-
-static void __iommu_unmap_sg_attrs(struct device *dev,
- struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
- if ((attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
- __iommu_sync_sg_for_cpu(dev, sgl, nelems, dir);
-
- iommu_dma_unmap_sg(dev, sgl, nelems, dir, attrs);
-}
-
-static const struct dma_map_ops iommu_dma_ops = {
- .alloc = __iommu_alloc_attrs,
- .free = __iommu_free_attrs,
- .mmap = __iommu_mmap_attrs,
- .get_sgtable = __iommu_get_sgtable,
- .map_page = __iommu_map_page,
- .unmap_page = __iommu_unmap_page,
- .map_sg = __iommu_map_sg_attrs,
- .unmap_sg = __iommu_unmap_sg_attrs,
- .sync_single_for_cpu = __iommu_sync_single_for_cpu,
- .sync_single_for_device = __iommu_sync_single_for_device,
- .sync_sg_for_cpu = __iommu_sync_sg_for_cpu,
- .sync_sg_for_device = __iommu_sync_sg_for_device,
- .map_resource = iommu_dma_map_resource,
- .unmap_resource = iommu_dma_unmap_resource,
- .mapping_error = iommu_dma_mapping_error,
-};
-
-static int __init __iommu_dma_init(void)
-{
- return iommu_dma_init();
-}
-arch_initcall(__iommu_dma_init);
-
-static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
- const struct iommu_ops *ops)
-{
- struct iommu_domain *domain;
-
- if (!ops)
- return;
-
- /*
- * The IOMMU core code allocates the default DMA domain, which the
- * underlying IOMMU driver needs to support via the dma-iommu layer.
- */
- domain = iommu_get_domain_for_dev(dev);
-
- if (!domain)
- goto out_err;
-
- if (domain->type == IOMMU_DOMAIN_DMA) {
- if (iommu_dma_init_domain(domain, dma_base, size, dev))
- goto out_err;
-
- dev->dma_ops = &iommu_dma_ops;
- }
-
- return;
-
-out_err:
- pr_warn("Failed to set up IOMMU for device %s; retaining platform DMA ops\n",
- dev_name(dev));
-}
-
void arch_teardown_dma_ops(struct device *dev)
{
dev->dma_ops = NULL;
}
-
-#else
-
-static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
- const struct iommu_ops *iommu)
-{ }
-
-#endif /* CONFIG_IOMMU_DMA */
-
-static void arm_iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size);
+#endif
void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
const struct iommu_ops *iommu, bool coherent)
{
- if (!dev->dma_ops) {
- if (dev->removed_mem)
- set_dma_ops(dev, &removed_dma_ops);
- else
- dev->dma_ops = &arm64_swiotlb_dma_ops;
+ int cls = cache_line_size_of_cpu();
+
+ WARN_TAINT(!coherent && cls > ARCH_DMA_MINALIGN,
+ TAINT_CPU_OUT_OF_SPEC,
+ "%s %s: ARCH_DMA_MINALIGN smaller than CTR_EL0.CWG (%d < %d)",
+ dev_driver_string(dev), dev_name(dev),
+ ARCH_DMA_MINALIGN, cls);
+
+ dev->dma_coherent = coherent;
+ if (iommu) {
+ iommu_setup_dma_ops(dev, dma_base, size);
+ trace_android_vh_iommu_setup_dma_ops(dev, dma_base, size);
+ trace_android_rvh_iommu_setup_dma_ops(dev, dma_base, size);
}
- dev->archdata.dma_coherent = coherent;
- if (of_parse_phandle(dev->of_node, "qcom,iommu-group", 0))
- arm_iommu_setup_dma_ops(dev, dma_base, size);
- else
- __iommu_setup_dma_ops(dev, dma_base, size, iommu);
+ /* Allow vendor modules to opt-in for the 2454944 erratum workaround */
+ trace_android_rvh_setup_dma_ops(dev);
#ifdef CONFIG_XEN
- if (xen_initial_domain()) {
- dev->archdata.dev_dma_ops = dev->dma_ops;
- dev->dma_ops = xen_dma_ops;
- }
+ if (xen_initial_domain())
+ dev->dma_ops = &xen_swiotlb_dma_ops;
#endif
}
-EXPORT_SYMBOL_GPL(arch_setup_dma_ops);
-#ifdef CONFIG_ARM64_DMA_USE_IOMMU
-
-/* guards initialization of default_domain->iova_cookie */
-static DEFINE_MUTEX(iommu_dma_init_mutex);
-
-static int
-iommu_init_mapping(struct device *dev, struct dma_iommu_mapping *mapping)
-{
- struct iommu_domain *domain = mapping->domain;
- dma_addr_t dma_base = mapping->base;
- u64 size = mapping->bits << PAGE_SHIFT;
- int ret;
- bool own_cookie;
-
- /*
- * if own_cookie is false, then we are sharing the iova_cookie with
- * another driver, and should not free it on error. Cleanup will be
- * done when the iommu_domain is freed.
- */
- own_cookie = !domain->iova_cookie;
-
- if (own_cookie) {
- ret = iommu_get_dma_cookie(domain);
- if (ret) {
- dev_err(dev, "iommu_get_dma_cookie failed: %d\n", ret);
- return ret;
- }
- }
-
- ret = iommu_dma_init_domain(domain, dma_base, size, dev);
- if (ret) {
- dev_err(dev, "iommu_dma_init_domain failed: %d\n", ret);
- if (own_cookie)
- iommu_put_dma_cookie(domain);
- return ret;
- }
-
- mapping->ops = &iommu_dma_ops;
- return 0;
-}
-
-static int arm_iommu_get_dma_cookie(struct device *dev,
- struct dma_iommu_mapping *mapping)
-{
- int s1_bypass = 0, is_fast = 0;
- int err = 0;
-
- mutex_lock(&iommu_dma_init_mutex);
-
- iommu_domain_get_attr(mapping->domain, DOMAIN_ATTR_S1_BYPASS,
- &s1_bypass);
- iommu_domain_get_attr(mapping->domain, DOMAIN_ATTR_FAST, &is_fast);
-
- if (s1_bypass)
- mapping->ops = &arm64_swiotlb_dma_ops;
- else if (is_fast)
- err = fast_smmu_init_mapping(dev, mapping);
- else
- err = iommu_init_mapping(dev, mapping);
-
- mutex_unlock(&iommu_dma_init_mutex);
- return err;
-}
-
-/*
- * Checks for "qcom,iommu-dma-addr-pool" property.
- * If not present, leaves dma_addr and dma_size unmodified.
- */
-static void arm_iommu_get_dma_window(struct device *dev, u64 *dma_addr,
- u64 *dma_size)
-{
- struct device_node *np;
- int naddr, nsize, len;
- const __be32 *ranges;
-
- if (!dev->of_node)
- return;
-
- np = of_parse_phandle(dev->of_node, "qcom,iommu-group", 0);
- if (!np)
- np = dev->of_node;
-
- ranges = of_get_property(np, "qcom,iommu-dma-addr-pool", &len);
- if (!ranges)
- return;
-
- len /= sizeof(u32);
- naddr = of_n_addr_cells(np);
- nsize = of_n_size_cells(np);
- if (len < naddr + nsize) {
- dev_err(dev, "Invalid length for qcom,iommu-dma-addr-pool, expected %d cells\n",
- naddr + nsize);
- return;
- }
- if (naddr == 0 || nsize == 0) {
- dev_err(dev, "Invalid #address-cells %d or #size-cells %d\n",
- naddr, nsize);
- return;
- }
-
- *dma_addr = of_read_number(ranges, naddr);
- *dma_size = of_read_number(ranges + naddr, nsize);
-}
-
-static void arm_iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size)
-{
- struct iommu_domain *domain;
- struct iommu_group *group;
- struct dma_iommu_mapping mapping = {0};
-
- group = dev->iommu_group;
- if (!group)
- return;
-
- arm_iommu_get_dma_window(dev, &dma_base, &size);
-
- domain = iommu_get_domain_for_dev(dev);
- if (!domain)
- return;
-
- /* Allow iommu-debug to call arch_setup_dma_ops to reconfigure itself */
- if (domain->type != IOMMU_DOMAIN_DMA &&
- !of_device_is_compatible(dev->of_node, "iommu-debug-test")) {
- dev_err(dev, "Invalid iommu domain type!\n");
- return;
- }
-
- mapping.base = dma_base;
- mapping.bits = size >> PAGE_SHIFT;
- mapping.domain = domain;
-
- if (arm_iommu_get_dma_cookie(dev, &mapping)) {
- dev_err(dev, "Failed to get dma cookie\n");
- return;
- }
-
- set_dma_ops(dev, mapping.ops);
-}
-
-#else /*!CONFIG_ARM64_DMA_USE_IOMMU */
-
-static void arm_iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size)
-{
-}
+#ifdef CONFIG_NO_GKI
+EXPORT_SYMBOL(__dma_map_area);
+EXPORT_SYMBOL(__dma_unmap_area);
#endif
--
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