diff options
56 files changed, 319 insertions, 983 deletions
diff --git a/arch/arm/include/asm/xen/page-coherent.h b/arch/arm/include/asm/xen/page-coherent.h deleted file mode 100644 index 27e984977402..000000000000 --- a/arch/arm/include/asm/xen/page-coherent.h +++ /dev/null @@ -1,2 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#include <xen/arm/page-coherent.h> diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index fe249ea91908..ce64bdb55a16 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -271,11 +271,7 @@ static void __init free_highpages(void) void __init mem_init(void) { #ifdef CONFIG_ARM_LPAE - if (swiotlb_force == SWIOTLB_FORCE || - max_pfn > arm_dma_pfn_limit) - swiotlb_init(1); - else - swiotlb_force = SWIOTLB_NO_FORCE; + swiotlb_init(max_pfn > arm_dma_pfn_limit, SWIOTLB_VERBOSE); #endif set_max_mapnr(pfn_to_page(max_pfn) - mem_map); diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c index a7e54a087b80..3d826c0b5fee 100644 --- a/arch/arm/xen/mm.c +++ b/arch/arm/xen/mm.c @@ -23,22 +23,20 @@ #include <asm/xen/hypercall.h> #include <asm/xen/interface.h> -unsigned long xen_get_swiotlb_free_pages(unsigned int order) +static gfp_t xen_swiotlb_gfp(void) { phys_addr_t base; - gfp_t flags = __GFP_NOWARN|__GFP_KSWAPD_RECLAIM; u64 i; for_each_mem_range(i, &base, NULL) { if (base < (phys_addr_t)0xffffffff) { if (IS_ENABLED(CONFIG_ZONE_DMA32)) - flags |= __GFP_DMA32; - else - flags |= __GFP_DMA; - break; + return __GFP_DMA32; + return __GFP_DMA; } } - return __get_free_pages(flags, order); + + return GFP_KERNEL; } static bool hypercall_cflush = false; @@ -118,23 +116,6 @@ bool xen_arch_need_swiotlb(struct device *dev, !dev_is_dma_coherent(dev)); } -int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order, - unsigned int address_bits, - dma_addr_t *dma_handle) -{ - if (!xen_initial_domain()) - return -EINVAL; - - /* we assume that dom0 is mapped 1:1 for now */ - *dma_handle = pstart; - return 0; -} - -void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order) -{ - return; -} - static int __init xen_mm_init(void) { struct gnttab_cache_flush cflush; @@ -143,10 +124,13 @@ static int __init xen_mm_init(void) if (!xen_swiotlb_detect()) return 0; - rc = xen_swiotlb_init(); /* we can work with the default swiotlb */ - if (rc < 0 && rc != -EEXIST) - return rc; + if (!io_tlb_default_mem.nslabs) { + rc = swiotlb_init_late(swiotlb_size_or_default(), + xen_swiotlb_gfp(), NULL); + if (rc < 0) + return rc; + } cflush.op = 0; cflush.a.dev_bus_addr = 0; diff --git a/arch/arm64/include/asm/xen/page-coherent.h b/arch/arm64/include/asm/xen/page-coherent.h deleted file mode 100644 index 27e984977402..000000000000 --- a/arch/arm64/include/asm/xen/page-coherent.h +++ /dev/null @@ -1,2 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#include <xen/arm/page-coherent.h> diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index a1410143ea62..339ee84e5a61 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -451,11 +451,7 @@ void __init bootmem_init(void) */ void __init mem_init(void) { - if (swiotlb_force == SWIOTLB_FORCE || - max_pfn > PFN_DOWN(arm64_dma_phys_limit)) - swiotlb_init(1); - else if (!xen_swiotlb_detect()) - swiotlb_force = SWIOTLB_NO_FORCE; + swiotlb_init(max_pfn > PFN_DOWN(arm64_dma_phys_limit), SWIOTLB_VERBOSE); /* this will put all unused low memory onto the freelists */ memblock_free_all(); diff --git a/arch/ia64/include/asm/iommu_table.h b/arch/ia64/include/asm/iommu_table.h deleted file mode 100644 index cc96116ac276..000000000000 --- a/arch/ia64/include/asm/iommu_table.h +++ /dev/null @@ -1,7 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_IA64_IOMMU_TABLE_H -#define _ASM_IA64_IOMMU_TABLE_H - -#define IOMMU_INIT_POST(_detect) - -#endif /* _ASM_IA64_IOMMU_TABLE_H */ diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c index 5d165607bf35..3c3e15b22608 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -437,9 +437,7 @@ mem_init (void) if (iommu_detected) break; #endif -#ifdef CONFIG_SWIOTLB - swiotlb_init(1); -#endif + swiotlb_init(true, SWIOTLB_VERBOSE); } while (0); #ifdef CONFIG_FLATMEM diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c index df70308db0e6..9fbba6a8fa4c 100644 --- a/arch/mips/cavium-octeon/dma-octeon.c +++ b/arch/mips/cavium-octeon/dma-octeon.c @@ -186,15 +186,12 @@ phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) return daddr; } -char *octeon_swiotlb; - void __init plat_swiotlb_setup(void) { phys_addr_t start, end; phys_addr_t max_addr; phys_addr_t addr_size; size_t swiotlbsize; - unsigned long swiotlb_nslabs; u64 i; max_addr = 0; @@ -236,15 +233,7 @@ void __init plat_swiotlb_setup(void) if (OCTEON_IS_OCTEON2() && max_addr >= 0x100000000ul) swiotlbsize = 64 * (1<<20); #endif - swiotlb_nslabs = swiotlbsize >> IO_TLB_SHIFT; - swiotlb_nslabs = ALIGN(swiotlb_nslabs, IO_TLB_SEGSIZE); - swiotlbsize = swiotlb_nslabs << IO_TLB_SHIFT; - - octeon_swiotlb = memblock_alloc_low(swiotlbsize, PAGE_SIZE); - if (!octeon_swiotlb) - panic("%s: Failed to allocate %zu bytes align=%lx\n", - __func__, swiotlbsize, PAGE_SIZE); - if (swiotlb_init_with_tbl(octeon_swiotlb, swiotlb_nslabs, 1) == -ENOMEM) - panic("Cannot allocate SWIOTLB buffer"); + swiotlb_adjust_size(swiotlbsize); + swiotlb_init(true, SWIOTLB_VERBOSE); } diff --git a/arch/mips/loongson64/dma.c b/arch/mips/loongson64/dma.c index 364f2f27c872..8220a1bc0db6 100644 --- a/arch/mips/loongson64/dma.c +++ b/arch/mips/loongson64/dma.c @@ -24,5 +24,5 @@ phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) void __init plat_swiotlb_setup(void) { - swiotlb_init(1); + swiotlb_init(true, SWIOTLB_VERBOSE); } diff --git a/arch/mips/pci/pci-octeon.c b/arch/mips/pci/pci-octeon.c index fc29b85cfa92..e457a18cbdc5 100644 --- a/arch/mips/pci/pci-octeon.c +++ b/arch/mips/pci/pci-octeon.c @@ -664,7 +664,7 @@ static int __init octeon_pci_setup(void) /* BAR1 movable regions contiguous to cover the swiotlb */ octeon_bar1_pci_phys = - virt_to_phys(octeon_swiotlb) & ~((1ull << 22) - 1); + io_tlb_default_mem.start & ~((1ull << 22) - 1); for (index = 0; index < 32; index++) { union cvmx_pci_bar1_indexx bar1_index; diff --git a/arch/mips/sibyte/common/dma.c b/arch/mips/sibyte/common/dma.c index eb47a94f3583..c5c2c782aff6 100644 --- a/arch/mips/sibyte/common/dma.c +++ b/arch/mips/sibyte/common/dma.c @@ -10,5 +10,5 @@ void __init plat_swiotlb_setup(void) { - swiotlb_init(1); + swiotlb_init(true, SWIOTLB_VERBOSE); } diff --git a/arch/powerpc/include/asm/svm.h b/arch/powerpc/include/asm/svm.h index 7546402d796a..85580b30aba4 100644 --- a/arch/powerpc/include/asm/svm.h +++ b/arch/powerpc/include/asm/svm.h @@ -15,8 +15,6 @@ static inline bool is_secure_guest(void) return mfmsr() & MSR_S; } -void __init svm_swiotlb_init(void); - void dtl_cache_ctor(void *addr); #define get_dtl_cache_ctor() (is_secure_guest() ? dtl_cache_ctor : NULL) @@ -27,8 +25,6 @@ static inline bool is_secure_guest(void) return false; } -static inline void svm_swiotlb_init(void) {} - #define get_dtl_cache_ctor() NULL #endif /* CONFIG_PPC_SVM */ diff --git a/arch/powerpc/include/asm/swiotlb.h b/arch/powerpc/include/asm/swiotlb.h index 3c1a1cd16128..4203b5e0a88e 100644 --- a/arch/powerpc/include/asm/swiotlb.h +++ b/arch/powerpc/include/asm/swiotlb.h @@ -9,6 +9,7 @@ #include <linux/swiotlb.h> extern unsigned int ppc_swiotlb_enable; +extern unsigned int ppc_swiotlb_flags; #ifdef CONFIG_SWIOTLB void swiotlb_detect_4g(void); diff --git a/arch/powerpc/kernel/dma-swiotlb.c b/arch/powerpc/kernel/dma-swiotlb.c index fc7816126a40..ba256c37bcc0 100644 --- a/arch/powerpc/kernel/dma-swiotlb.c +++ b/arch/powerpc/kernel/dma-swiotlb.c @@ -10,6 +10,7 @@ #include <asm/swiotlb.h> unsigned int ppc_swiotlb_enable; +unsigned int ppc_swiotlb_flags; void __init swiotlb_detect_4g(void) { diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 4d221d033804..46fb78e3bb36 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -17,6 +17,7 @@ #include <linux/suspend.h> #include <linux/dma-direct.h> +#include <asm/swiotlb.h> #include <asm/machdep.h> #include <asm/rtas.h> #include <asm/kasan.h> @@ -248,10 +249,7 @@ void __init mem_init(void) * back to to-down. */ memblock_set_bottom_up(true); - if (is_secure_guest()) - svm_swiotlb_init(); - else - swiotlb_init(0); + swiotlb_init(ppc_swiotlb_enable, ppc_swiotlb_flags); #endif high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 955ff8aa1644..0f74b2284773 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -849,9 +849,6 @@ static void __init pSeries_setup_arch(void) } ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare; - - if (swiotlb_force == SWIOTLB_FORCE) - ppc_swiotlb_enable = 1; } static void pseries_panic(char *str) diff --git a/arch/powerpc/platforms/pseries/svm.c b/arch/powerpc/platforms/pseries/svm.c index c5228f4969eb..3b4045d508ec 100644 --- a/arch/powerpc/platforms/pseries/svm.c +++ b/arch/powerpc/platforms/pseries/svm.c @@ -28,7 +28,7 @@ static int __init init_svm(void) * need to use the SWIOTLB buffer for DMA even if dma_capable() says * otherwise. */ - swiotlb_force = SWIOTLB_FORCE; + ppc_swiotlb_flags |= SWIOTLB_ANY | SWIOTLB_FORCE; /* Share the SWIOTLB buffer with the host. */ swiotlb_update_mem_attributes(); @@ -37,30 +37,6 @@ static int __init init_svm(void) } machine_early_initcall(pseries, init_svm); -/* - * Initialize SWIOTLB. Essentially the same as swiotlb_init(), except that it - * can allocate the buffer anywhere in memory. Since the hypervisor doesn't have - * any addressing limitation, we don't need to allocate it in low addresses. - */ -void __init svm_swiotlb_init(void) -{ - unsigned char *vstart; - unsigned long bytes, io_tlb_nslabs; - - io_tlb_nslabs = (swiotlb_size_or_default() >> IO_TLB_SHIFT); - io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE); - - bytes = io_tlb_nslabs << IO_TLB_SHIFT; - - vstart = memblock_alloc(PAGE_ALIGN(bytes), PAGE_SIZE); - if (vstart && !swiotlb_init_with_tbl(vstart, io_tlb_nslabs, false)) - return; - - - memblock_free(vstart, PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT)); - panic("SVM: Cannot allocate SWIOTLB buffer"); -} - int set_memory_encrypted(unsigned long addr, int numpages) { if (!cc_platform_has(CC_ATTR_MEM_ENCRYPT)) diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 05ed641a1134..180d6a3e2a05 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -120,13 +120,7 @@ void __init mem_init(void) BUG_ON(!mem_map); #endif /* CONFIG_FLATMEM */ -#ifdef CONFIG_SWIOTLB - if (swiotlb_force == SWIOTLB_FORCE || - max_pfn > PFN_DOWN(dma32_phys_limit)) - swiotlb_init(1); - else - swiotlb_force = SWIOTLB_NO_FORCE; -#endif + swiotlb_init(max_pfn > PFN_DOWN(dma32_phys_limit), SWIOTLB_VERBOSE); memblock_free_all(); print_vm_layout(); diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index 86ffd0d51fd5..6fb6bf64326f 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -185,8 +185,7 @@ static void pv_init(void) return; /* make sure bounce buffers are shared */ - swiotlb_force = SWIOTLB_FORCE; - swiotlb_init(1); + swiotlb_init(true, SWIOTLB_FORCE | SWIOTLB_VERBOSE); swiotlb_update_mem_attributes(); } diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h index bb1654fe0ce7..1c66708e3062 100644 --- a/arch/x86/include/asm/dma-mapping.h +++ b/arch/x86/include/asm/dma-mapping.h @@ -2,18 +2,6 @@ #ifndef _ASM_X86_DMA_MAPPING_H #define _ASM_X86_DMA_MAPPING_H -/* - * IOMMU interface. See Documentation/core-api/dma-api-howto.rst and - * Documentation/core-api/dma-api.rst for documentation. - */ - -#include <linux/scatterlist.h> -#include <asm/io.h> -#include <asm/swiotlb.h> - -extern int iommu_merge; -extern int panic_on_overflow; - extern const struct dma_map_ops *dma_ops; static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) diff --git a/arch/x86/include/asm/gart.h b/arch/x86/include/asm/gart.h index 318556574345..5af8088a10df 100644 --- a/arch/x86/include/asm/gart.h +++ b/arch/x86/include/asm/gart.h @@ -38,7 +38,7 @@ extern int gart_iommu_aperture_disabled; extern void early_gart_iommu_check(void); extern int gart_iommu_init(void); extern void __init gart_parse_options(char *); -extern int gart_iommu_hole_init(void); +void gart_iommu_hole_init(void); #else #define gart_iommu_aperture 0 @@ -51,9 +51,8 @@ static inline void early_gart_iommu_check(void) static inline void gart_parse_options(char *options) { } -static inline int gart_iommu_hole_init(void) +static inline void gart_iommu_hole_init(void) { - return -ENODEV; } #endif diff --git a/arch/x86/include/asm/iommu.h b/arch/x86/include/asm/iommu.h index bf1ed2ddc74b..0bef44d30a27 100644 --- a/arch/x86/include/asm/iommu.h +++ b/arch/x86/include/asm/iommu.h @@ -8,6 +8,14 @@ extern int force_iommu, no_iommu; extern int iommu_detected; +extern int iommu_merge; +extern int panic_on_overflow; + +#ifdef CONFIG_SWIOTLB +extern bool x86_swiotlb_enable; +#else +#define x86_swiotlb_enable false +#endif /* 10 seconds */ #define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000) diff --git a/arch/x86/include/asm/iommu_table.h b/arch/x86/include/asm/iommu_table.h deleted file mode 100644 index 1fb3fd1a83c2..000000000000 --- a/arch/x86/include/asm/iommu_table.h +++ /dev/null @@ -1,102 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_X86_IOMMU_TABLE_H -#define _ASM_X86_IOMMU_TABLE_H - -#include <asm/swiotlb.h> - -/* - * History lesson: - * The execution chain of IOMMUs in 2.6.36 looks as so: - * - * [xen-swiotlb] - * | - * +----[swiotlb *]--+ - * / | \ - * / | \ - * [GART] [Calgary] [Intel VT-d] - * / - * / - * [AMD-Vi] - * - * *: if SWIOTLB detected 'iommu=soft'/'swiotlb=force' it would skip - * over the rest of IOMMUs and unconditionally initialize the SWIOTLB. - * Also it would surreptitiously initialize set the swiotlb=1 if there were - * more than 4GB and if the user did not pass in 'iommu=off'. The swiotlb - * flag would be turned off by all IOMMUs except the Calgary one. - * - * The IOMMU_INIT* macros allow a similar tree (or more complex if desired) - * to be built by defining who we depend on. - * - * And all that needs to be done is to use one of the macros in the IOMMU - * and the pci-dma.c will take care of the rest. - */ - -struct iommu_table_entry { - initcall_t detect; - initcall_t depend; - void (*early_init)(void); /* No memory allocate available. */ - void (*late_init)(void); /* Yes, can allocate memory. */ -#define IOMMU_FINISH_IF_DETECTED (1<<0) -#define IOMMU_DETECTED (1<<1) - int flags; -}; -/* - * Macro fills out an entry in the .iommu_table that is equivalent - * to the fields that 'struct iommu_table_entry' has. The entries - * that are put in the .iommu_table section are not put in any order - * hence during boot-time we will have to resort them based on - * dependency. */ - - -#define __IOMMU_INIT(_detect, _depend, _early_init, _late_init, _finish)\ - static const struct iommu_table_entry \ - __iommu_entry_##_detect __used \ - __attribute__ ((unused, __section__(".iommu_table"), \ - aligned((sizeof(void *))))) \ - = {_detect, _depend, _early_init, _late_init, \ - _finish ? IOMMU_FINISH_IF_DETECTED : 0} -/* - * The simplest IOMMU definition. Provide the detection routine - * and it will be run after the SWIOTLB and the other IOMMUs - * that utilize this macro. If the IOMMU is detected (ie, the - * detect routine returns a positive value), the other IOMMUs - * are also checked. You can use IOMMU_INIT_POST_FINISH if you prefer - * to stop detecting the other IOMMUs after yours has been detected. - */ -#define IOMMU_INIT_POST(_detect) \ - __IOMMU_INIT(_detect, pci_swiotlb_detect_4gb, NULL, NULL, 0) - -#define IOMMU_INIT_POST_FINISH(detect) \ - __IOMMU_INIT(_detect, pci_swiotlb_detect_4gb, NULL, NULL, 1) - -/* - * A more sophisticated version of IOMMU_INIT. This variant requires: - * a). A detection routine function. - * b). The name of the detection routine we depend on to get called - * before us. - * c). The init routine which gets called if the detection routine - * returns a positive value from the pci_iommu_alloc. This means - * no presence of a memory allocator. - * d). Similar to the 'init', except that this gets called from pci_iommu_init - * where we do have a memory allocator. - * - * The standard IOMMU_INIT differs from the IOMMU_INIT_FINISH variant - * in that the former will continue detecting other IOMMUs in the call - * list after the detection routine returns a positive number, while the - * latter will stop the execution chain upon first successful detection. - * Both variants will still call the 'init' and 'late_init' functions if - * they are set. - */ -#define IOMMU_INIT_FINISH(_detect, _depend, _init, _late_init) \ - __IOMMU_INIT(_detect, _depend, _init, _late_init, 1) - -#define IOMMU_INIT(_detect, _depend, _init, _late_init) \ - __IOMMU_INIT(_detect, _depend, _init, _late_init, 0) - -void sort_iommu_table(struct iommu_table_entry *start, - struct iommu_table_entry *finish); - -void check_iommu_entries(struct iommu_table_entry *start, - struct iommu_table_entry *finish); - -#endif /* _ASM_X86_IOMMU_TABLE_H */ diff --git a/arch/x86/include/asm/swiotlb.h b/arch/x86/include/asm/swiotlb.h deleted file mode 100644 index ff6c92eff035..000000000000 --- a/arch/x86/include/asm/swiotlb.h +++ /dev/null @@ -1,30 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_X86_SWIOTLB_H -#define _ASM_X86_SWIOTLB_H - -#include <linux/swiotlb.h> - -#ifdef CONFIG_SWIOTLB -extern int swiotlb; -extern int __init pci_swiotlb_detect_override(void); -extern int __init pci_swiotlb_detect_4gb(void); -extern void __init pci_swiotlb_init(void); -extern void __init pci_swiotlb_late_init(void); -#else -#define swiotlb 0 -static inline int pci_swiotlb_detect_override(void) -{ - return 0; -} -static inline int pci_swiotlb_detect_4gb(void) -{ - return 0; -} -static inline void pci_swiotlb_init(void) -{ -} -static inline void pci_swiotlb_late_init(void) -{ -} -#endif -#endif /* _ASM_X86_SWIOTLB_H */ diff --git a/arch/x86/include/asm/xen/page-coherent.h b/arch/x86/include/asm/xen/page-coherent.h deleted file mode 100644 index 63cd41b2e17a..000000000000 --- a/arch/x86/include/asm/xen/page-coherent.h +++ /dev/null @@ -1,24 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_X86_XEN_PAGE_COHERENT_H -#define _ASM_X86_XEN_PAGE_COHERENT_H - -#include <asm/page.h> -#include <linux/dma-mapping.h> - -static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size, - dma_addr_t *dma_handle, gfp_t flags, - unsigned long attrs) -{ - void *vstart = (void*)__get_free_pages(flags, get_order(size)); - *dma_handle = virt_to_phys(vstart); - return vstart; -} - -static inline void xen_free_coherent_pages(struct device *hwdev, size_t size, - void *cpu_addr, dma_addr_t dma_handle, - unsigned long attrs) -{ - free_pages((unsigned long) cpu_addr, get_order(size)); -} - -#endif /* _ASM_X86_XEN_PAGE_COHERENT_H */ diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h index e989bc2269f5..1fc67df50014 100644 --- a/arch/x86/include/asm/xen/page.h +++ b/arch/x86/include/asm/xen/page.h @@ -357,9 +357,4 @@ static inline bool xen_arch_need_swiotlb(struct device *dev, return false; } -static inline unsigned long xen_get_swiotlb_free_pages(unsigned int order) -{ - return __get_free_pages(__GFP_NOWARN, order); -} - #endif /* _ASM_X86_XEN_PAGE_H */ diff --git a/arch/x86/include/asm/xen/swiotlb-xen.h b/arch/x86/include/asm/xen/swiotlb-xen.h index 66b4ddde7743..77a2d19cc990 100644 --- a/arch/x86/include/asm/xen/swiotlb-xen.h +++ b/arch/x86/include/asm/xen/swiotlb-xen.h @@ -3,11 +3,15 @@ #define _ASM_X86_SWIOTLB_XEN_H #ifdef CONFIG_SWIOTLB_XEN -extern int __init pci_xen_swiotlb_detect(void); extern int pci_xen_swiotlb_init_late(void); #else -#define pci_xen_swiotlb_detect NULL static inline int pci_xen_swiotlb_init_late(void) { return -ENXIO; } #endif +int xen_swiotlb_fixup(void *buf, unsigned long nslabs); +int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order, + unsigned int address_bits, + dma_addr_t *dma_handle); +void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order); + #endif /* _ASM_X86_SWIOTLB_XEN_H */ diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index 1a2dc328cb5e..03364dc40d8d 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -66,7 +66,6 @@ obj-y += bootflag.o e820.o obj-y += pci-dma.o quirks.o topology.o kdebugfs.o obj-y += alternative.o i8253.o hw_breakpoint.o obj-y += tsc.o tsc_msr.o io_delay.o rtc.o -obj-y += pci-iommu_table.o obj-y += resource.o obj-y += irqflags.o obj-y += static_call.o @@ -132,7 +131,6 @@ obj-$(CONFIG_PCSPKR_PLATFORM) += pcspeaker.o obj-$(CONFIG_X86_CHECK_BIOS_CORRUPTION) += check.o -obj-$(CONFIG_SWIOTLB) += pci-swiotlb.o obj-$(CONFIG_OF) += devicetree.o obj-$(CONFIG_UPROBES) += uprobes.o diff --git a/arch/x86/kernel/amd_gart_64.c b/arch/x86/kernel/amd_gart_64.c index ed837383de5c..194d54eed537 100644 --- a/arch/x86/kernel/amd_gart_64.c +++ b/arch/x86/kernel/amd_gart_64.c @@ -38,11 +38,9 @@ #include <asm/iommu.h> #include <asm/gart.h> #include <asm/set_memory.h> -#include <asm/swiotlb.h> #include <asm/dma.h> #include <asm/amd_nb.h> #include <asm/x86_init.h> -#include <asm/iommu_table.h> static unsigned long iommu_bus_base; /* GART remapping area (physical) */ static unsigned long iommu_size; /* size of remapping area bytes */ @@ -808,7 +806,7 @@ int __init gart_iommu_init(void) flush_gart(); dma_ops = &gart_dma_ops; x86_platform.iommu_shutdown = gart_iommu_shutdown; - swiotlb = 0; + x86_swiotlb_enable = false; return 0; } @@ -842,4 +840,3 @@ void __init gart_parse_options(char *p) } } } -IOMMU_INIT_POST(gart_iommu_hole_init); diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c index af3ba08b684b..7a5630d904b2 100644 --- a/arch/x86/kernel/aperture_64.c +++ b/arch/x86/kernel/aperture_64.c @@ -392,7 +392,7 @@ void __init early_gart_iommu_check(void) static int __initdata printed_gart_size_msg; -int __init gart_iommu_hole_init(void) +void __init gart_iommu_hole_init(void) { u32 agp_aper_base = 0, agp_aper_order = 0; u32 aper_size, aper_alloc = 0, aper_order = 0, last_aper_order = 0; @@ -401,11 +401,11 @@ int __init gart_iommu_hole_init(void) int i, node; if (!amd_gart_present()) - return -ENODEV; + return; if (gart_iommu_aperture_disabled || !fix_aperture || !early_pci_allowed()) - return -ENODEV; + return; pr_info("Checking aperture...\n"); @@ -491,10 +491,8 @@ out: * and fixed up the northbridge */ exclude_from_core(last_aper_base, last_aper_order); - - return 1; } - return 0; + return; } if (!fallback_aper_force) { @@ -527,7 +525,7 @@ out: panic("Not enough memory for aperture"); } } else { - return 0; + return; } /* @@ -561,6 +559,4 @@ out: } set_up_gart_resume(aper_order, aper_alloc); - - return 1; } diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 4b67094215bb..5b8f2c357160 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -337,14 +337,6 @@ static void __init ms_hyperv_init_platform(void) swiotlb_unencrypted_base = ms_hyperv.shared_gpa_boundary; #endif } - -#ifdef CONFIG_SWIOTLB - /* - * Enable swiotlb force mode in Isolation VM to - * use swiotlb bounce buffer for dma transaction. - */ - swiotlb_force = SWIOTLB_FORCE; -#endif /* Isolation VMs are unenlightened SEV-based VMs, thus this check: */ if (IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT)) { if (hv_get_isolation_type() != HV_ISOLATION_TYPE_NONE) diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index de234e7a8962..30bbe4abb5d6 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -7,13 +7,16 @@ #include <linux/memblock.h> #include <linux/gfp.h> #include <linux/pci.h> +#include <linux/amd-iommu.h> #include <asm/proto.h> #include <asm/dma.h> #include <asm/iommu.h> #include <asm/gart.h> #include <asm/x86_init.h> -#include <asm/iommu_table.h> + +#include <xen/xen.h> +#include <xen/swiotlb-xen.h> static bool disable_dac_quirk __read_mostly; @@ -34,24 +37,90 @@ int no_iommu __read_mostly; /* Set this to 1 if there is a HW IOMMU in the system */ int iommu_detected __read_mostly = 0; -extern struct iommu_table_entry __iommu_table[], __iommu_table_end[]; +#ifdef CONFIG_SWIOTLB +bool x86_swiotlb_enable; +static unsigned int x86_swiotlb_flags; + +static void __init pci_swiotlb_detect(void) +{ + /* don't initialize swiotlb if iommu=off (no_iommu=1) */ + if (!no_iommu && max_possible_pfn > MAX_DMA32_PFN) + x86_swiotlb_enable = true; + + /* + * Set swiotlb to 1 so that bounce buffers are allocated and used for + * devices that can't support DMA to encrypted memory. + */ + if (cc_platform_has(CC_ATTR_HOST_MEM_ENCRYPT)) + x86_swiotlb_enable = true; + + /* + * Guest with guest memory encryption currently perform all DMA through + * bounce buffers as the hypervisor can't access arbitrary VM memory + * that is not explicitly shared with it. + */ + if (cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT)) { + x86_swiotlb_enable = true; + x86_swiotlb_flags |= SWIOTLB_FORCE; + } +} +#else +static inline void __init pci_swiotlb_detect(void) +{ +} +#define x86_swiotlb_flags 0 +#endif /* CONFIG_SWIOTLB */ + +#ifdef CONFIG_SWIOTLB_XEN +static void __init pci_xen_swiotlb_init(void) +{ + if (!xen_initial_domain() && !x86_swiotlb_enable) + return; + x86_swiotlb_enable = true; + x86_swiotlb_flags |= SWIOTLB_ANY; + swiotlb_init_remap(true, x86_swiotlb_flags, xen_swiotlb_fixup); + dma_ops = &xen_swiotlb_dma_ops; + if (IS_ENABLED(CONFIG_PCI)) + pci_request_acs(); +} + +int pci_xen_swiotlb_init_late(void) +{ + if (dma_ops == &xen_swiotlb_dma_ops) + return 0; + + /* we can work with the default swiotlb */ + if (!io_tlb_default_mem.nslabs) { + int rc = swiotlb_init_late(swiotlb_size_or_default(), + GFP_KERNEL, xen_swiotlb_fixup); + if (rc < 0) + return rc; + } + + /* XXX: this switches the dma ops under live devices! */ + dma_ops = &xen_swiotlb_dma_ops; + if (IS_ENABLED(CONFIG_PCI)) + pci_request_acs(); + return 0; +} +EXPORT_SYMBOL_GPL(pci_xen_swiotlb_init_late); +#else +static inline void __init pci_xen_swiotlb_init(void) +{ +} +#endif /* CONFIG_SWIOTLB_XEN */ void __init pci_iommu_alloc(void) { - struct iommu_table_entry *p; - - sort_iommu_table(__iommu_table, __iommu_table_end); - check_iommu_entries(__iommu_table, __iommu_table_end); - - for (p = __iommu_table; p < __iommu_table_end; p++) { - if (p && p->detect && p->detect() > 0) { - p->flags |= IOMMU_DETECTED; - if (p->early_init) - p->early_init(); - if (p->flags & IOMMU_FINISH_IF_DETECTED) - break; - } + if (xen_pv_domain()) { + pci_xen_swiotlb_init(); + return; } + pci_swiotlb_detect(); + gart_iommu_hole_init(); + amd_iommu_detect(); + detect_intel_iommu(); + swiotlb_init(x86_swiotlb_enable, x86_swiotlb_flags); } /* @@ -102,7 +171,7 @@ static __init int iommu_setup(char *p) } #ifdef CONFIG_SWIOTLB if (!strncmp(p, "soft", 4)) - swiotlb = 1; + x86_swiotlb_enable = true; #endif if (!strncmp(p, "pt", 2)) iommu_set_default_passthrough(true); @@ -121,14 +190,17 @@ early_param("iommu", iommu_setup); static int __init pci_iommu_init(void) { - struct iommu_table_entry *p; - x86_init.iommu.iommu_init(); - for (p = __iommu_table; p < __iommu_table_end; p++) { - if (p && (p->flags & IOMMU_DETECTED) && p->late_init) - p->late_init(); +#ifdef CONFIG_SWIOTLB + /* An IOMMU turned us off. */ + if (x86_swiotlb_enable) { + pr_info("PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n"); + swiotlb_print_info(); + } else { + swiotlb_exit(); } +#endif return 0; } diff --git a/arch/x86/kernel/pci-iommu_table.c b/arch/x86/kernel/pci-iommu_table.c deleted file mode 100644 index 42e92ec62973..000000000000 --- a/arch/x86/kernel/pci-iommu_table.c +++ /dev/null @@ -1,77 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include <linux/dma-mapping.h> -#include <asm/iommu_table.h> -#include <linux/string.h> -#include <linux/kallsyms.h> - -static struct iommu_table_entry * __init -find_dependents_of(struct iommu_table_entry *start, - struct iommu_table_entry *finish, - struct iommu_table_entry *q) -{ - struct iommu_table_entry *p; - - if (!q) - return NULL; - - for (p = start; p < finish; p++) - if (p->detect == q->depend) - return p; - - return NULL; -} - - -void __init sort_iommu_table(struct iommu_table_entry *start, - struct iommu_table_entry *finish) { - - struct iommu_table_entry *p, *q, tmp; - - for (p = start; p < finish; p++) { -again: - q = find_dependents_of(start, finish, p); - /* We are bit sneaky here. We use the memory address to figure - * out if the node we depend on is past our point, if so, swap. - */ - if (q > p) { - tmp = *p; - memmove(p, q, sizeof(*p)); - *q = tmp; - goto again; - } - } - -} - -#ifdef DEBUG -void __init check_iommu_entries(struct iommu_table_entry *start, - struct iommu_table_entry *finish) -{ - struct iommu_table_entry *p, *q, *x; - - /* Simple cyclic dependency checker. */ - for (p = start; p < finish; p++) { - q = find_dependents_of(start, finish, p); - x = find_dependents_of(start, finish, q); - if (p == x) { - printk(KERN_ERR "CYCLIC DEPENDENCY FOUND! %pS depends on %pS and vice-versa. BREAKING IT.\n", - p->detect, q->detect); - /* Heavy handed way..*/ - x->depend = NULL; - } - } - - for (p = start; p < finish; p++) { - q = find_dependents_of(p, finish, p); - if (q && q > p) { - printk(KERN_ERR "EXECUTION ORDER INVALID! %pS should be called before %pS!\n", - p->detect, q->detect); - } - } -} -#else -void __init check_iommu_entries(struct iommu_table_entry *start, - struct iommu_table_entry *finish) -{ -} -#endif diff --git a/arch/x86/kernel/pci-swiotlb.c b/arch/x86/kernel/pci-swiotlb.c deleted file mode 100644 index 814ab46a0dad..000000000000 --- a/arch/x86/kernel/pci-swiotlb.c +++ /dev/null @@ -1,77 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 - -#include <linux/pci.h> -#include <linux/cache.h> -#include <linux/init.h> -#include <linux/swiotlb.h> -#include <linux/memblock.h> -#include <linux/dma-direct.h> -#include <linux/cc_platform.h> - -#include <asm/iommu.h> -#include <asm/swiotlb.h> -#include <asm/dma.h> -#include <asm/xen/swiotlb-xen.h> -#include <asm/iommu_table.h> - -int swiotlb __read_mostly; - -/* - * pci_swiotlb_detect_override - set swiotlb to 1 if necessary - * - * This returns non-zero if we are forced to use swiotlb (by the boot - * option). - */ -int __init pci_swiotlb_detect_override(void) -{ - if (swiotlb_force == SWIOTLB_FORCE) - swiotlb = 1; - - return swiotlb; -} -IOMMU_INIT_FINISH(pci_swiotlb_detect_override, - pci_xen_swiotlb_detect, - pci_swiotlb_init, - pci_swiotlb_late_init); - -/* - * If 4GB or more detected (and iommu=off not set) or if SME is active - * then set swiotlb to 1 and return 1. - */ -int __init pci_swiotlb_detect_4gb(void) -{ - /* don't initialize swiotlb if iommu=off (no_iommu=1) */ - if (!no_iommu && max_possible_pfn > MAX_DMA32_PFN) - swiotlb = 1; - - /* - * Set swiotlb to 1 so that bounce buffers are allocated and used for - * devices that can't support DMA to encrypted memory. - */ - if (cc_platform_has(CC_ATTR_HOST_MEM_ENCRYPT)) - swiotlb = 1; - - return swiotlb; -} -IOMMU_INIT(pci_swiotlb_detect_4gb, - pci_swiotlb_detect_override, - pci_swiotlb_init, - pci_swiotlb_late_init); - -void __init pci_swiotlb_init(void) -{ - if (swiotlb) - swiotlb_init(0); -} - -void __init pci_swiotlb_late_init(void) -{ - /* An IOMMU turned us off. */ - if (!swiotlb) - swiotlb_exit(); - else { - printk(KERN_INFO "PCI-DMA: " - "Using software bounce buffering for IO (SWIOTLB)\n"); - swiotlb_print_info(); - } -} diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c index f9af561c3cd4..0c1154a1c403 100644 --- a/arch/x86/kernel/tboot.c +++ b/arch/x86/kernel/tboot.c @@ -24,7 +24,6 @@ #include <asm/processor.h> #include <asm/bootparam.h> #include <asm/pgalloc.h> -#include <asm/swiotlb.h> #include <asm/fixmap.h> #include <asm/proto.h> #include <asm/setup.h> diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S index 7fda7f27e762..f5f6dc2e8007 100644 --- a/arch/x86/kernel/vmlinux.lds.S +++ b/arch/x86/kernel/vmlinux.lds.S @@ -315,18 +315,6 @@ SECTIONS *(.altinstr_replacement) } - /* - * struct iommu_table_entry entries are injected in this section. - * It is an array of IOMMUs which during run time gets sorted depending - * on its dependency order. After rootfs_initcall is complete - * this section can be safely removed. - */ - .iommu_table : AT(ADDR(.iommu_table) - LOAD_OFFSET) { - __iommu_table = .; - *(.iommu_table) - __iommu_table_end = .; - } - . = ALIGN(8); .apicdrivers : AT(ADDR(.apicdrivers) - LOAD_OFFSET) { __apicdrivers = .; diff --git a/arch/x86/mm/mem_encrypt_amd.c b/arch/x86/mm/mem_encrypt_amd.c index d3c88d9ef8d6..e8f7953fda83 100644 --- a/arch/x86/mm/mem_encrypt_amd.c +++ b/arch/x86/mm/mem_encrypt_amd.c @@ -495,9 +495,6 @@ void __init sme_early_init(void) for (i = 0; i < ARRAY_SIZE(protection_map); i++) protection_map[i] = pgprot_encrypted(protection_map[i]); - if (cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT)) - swiotlb_force = SWIOTLB_FORCE; - x86_platform.guest.enc_status_change_prepare = amd_enc_status_change_prepare; x86_platform.guest.enc_status_change_finish = amd_enc_status_change_finish; x86_platform.guest.enc_tlb_flush_required = amd_enc_tlb_flush_required; diff --git a/arch/x86/pci/sta2x11-fixup.c b/arch/x86/pci/sta2x11-fixup.c index 101081ad64b6..7368afc03998 100644 --- a/arch/x86/pci/sta2x11-fixup.c +++ b/arch/x86/pci/sta2x11-fixup.c @@ -57,7 +57,7 @@ static void sta2x11_new_instance(struct pci_dev *pdev) int size = STA2X11_SWIOTLB_SIZE; /* First instance: register your own swiotlb area */ dev_info(&pdev->dev, "Using SWIOTLB (size %i)\n", size); - if (swiotlb_late_init_with_default_size(size)) + if (swiotlb_init_late(size, GFP_DMA, NULL)) dev_emerg(&pdev->dev, "init swiotlb failed\n"); } list_add(&instance->list, &sta2x11_instance_list); diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile index 4953260e281c..3c5b52fbe4a7 100644 --- a/arch/x86/xen/Makefile +++ b/arch/x86/xen/Makefile @@ -47,6 +47,4 @@ obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o obj-$(CONFIG_XEN_PV_DOM0) += vga.o -obj-$(CONFIG_SWIOTLB_XEN) += pci-swiotlb-xen.o - obj-$(CONFIG_XEN_EFI) += efi.o diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c index 00354866921b..ee29fb558f2e 100644 --- a/arch/x86/xen/mmu_pv.c +++ b/arch/x86/xen/mmu_pv.c @@ -80,6 +80,7 @@ #include <xen/interface/version.h> #include <xen/interface/memory.h> #include <xen/hvc-console.h> +#include <xen/swiotlb-xen.h> #include "multicalls.h" #include "mmu.h" diff --git a/arch/x86/xen/pci-swiotlb-xen.c b/arch/x86/xen/pci-swiotlb-xen.c deleted file mode 100644 index 46df59aeaa06..000000000000 --- a/arch/x86/xen/pci-swiotlb-xen.c +++ /dev/null @@ -1,96 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 - -/* Glue code to lib/swiotlb-xen.c */ - -#include <linux/dma-map-ops.h> -#include <linux/pci.h> -#include <xen/swiotlb-xen.h> - -#include <asm/xen/hypervisor.h> -#include <xen/xen.h> -#include <asm/iommu_table.h> - - -#include <asm/xen/swiotlb-xen.h> -#ifdef CONFIG_X86_64 -#include <asm/iommu.h> -#include <asm/dma.h> -#endif -#include <linux/export.h> - -static int xen_swiotlb __read_mostly; - -/* - * pci_xen_swiotlb_detect - set xen_swiotlb to 1 if necessary - * - * This returns non-zero if we are forced to use xen_swiotlb (by the boot - * option). - */ -int __init pci_xen_swiotlb_detect(void) -{ - - if (!xen_pv_domain()) - return 0; - - /* If running as PV guest, either iommu=soft, or swiotlb=force will - * activate this IOMMU. If running as PV privileged, activate it - * irregardless. - */ - if (xen_initial_domain() || swiotlb || swiotlb_force == SWIOTLB_FORCE) - xen_swiotlb = 1; - - /* If we are running under Xen, we MUST disable the native SWIOTLB. - * Don't worry about swiotlb_force flag activating the native, as - * the 'swiotlb' flag is the only one turning it on. */ - swiotlb = 0; - -#ifdef CONFIG_X86_64 - /* pci_swiotlb_detect_4gb turns on native SWIOTLB if no_iommu == 0 - * (so no iommu=X command line over-writes). - * Considering that PV guests do not want the *native SWIOTLB* but - * only Xen SWIOTLB it is not useful to us so set no_iommu=1 here. - */ - if (max_pfn > MAX_DMA32_PFN) - no_iommu = 1; -#endif - return xen_swiotlb; -} - -static void __init pci_xen_swiotlb_init(void) -{ - if (xen_swiotlb) { - xen_swiotlb_init_early(); - dma_ops = &xen_swiotlb_dma_ops; - -#ifdef CONFIG_PCI - /* Make sure ACS will be enabled */ - pci_request_acs(); -#endif - } -} - -int pci_xen_swiotlb_init_late(void) -{ - int rc; - - if (xen_swiotlb) - return 0; - - rc = xen_swiotlb_init(); - if (rc) - return rc; - - dma_ops = &xen_swiotlb_dma_ops; -#ifdef CONFIG_PCI - /* Make sure ACS will be enabled */ - pci_request_acs(); -#endif - - return 0; -} -EXPORT_SYMBOL_GPL(pci_xen_swiotlb_init_late); - -IOMMU_INIT_FINISH(pci_xen_swiotlb_detect, - NULL, - pci_xen_swiotlb_init, - NULL); diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index b4a798c7b347..1a3ad58ba846 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -27,7 +27,6 @@ #include <asm/apic.h> #include <asm/gart.h> #include <asm/x86_init.h> -#include <asm/iommu_table.h> #include <asm/io_apic.h> #include <asm/irq_remapping.h> #include <asm/set_memory.h> @@ -3257,11 +3256,6 @@ __setup("ivrs_ioapic", parse_ivrs_ioapic); __setup("ivrs_hpet", parse_ivrs_hpet); __setup("ivrs_acpihid", parse_ivrs_acpihid); -IOMMU_INIT_FINISH(amd_iommu_detect, - gart_iommu_hole_init, - NULL, - NULL); - bool amd_iommu_v2_supported(void) { return amd_iommu_v2_present; diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index a1ada7bff44e..b47220ac09ea 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -1840,7 +1840,10 @@ void amd_iommu_domain_update(struct protection_domain *domain) static void __init amd_iommu_init_dma_ops(void) { - swiotlb = (iommu_default_passthrough() || sme_me_mask) ? 1 : 0; + if (iommu_default_passthrough() || sme_me_mask) + x86_swiotlb_enable = true; + else + x86_swiotlb_enable = false; } int __init amd_iommu_init_api(void) diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c index 4de960834a1b..592c1e1a5d4b 100644 --- a/drivers/iommu/intel/dmar.c +++ b/drivers/iommu/intel/dmar.c @@ -30,7 +30,6 @@ #include <linux/numa.h> #include <linux/limits.h> #include <asm/irq_remapping.h> -#include <asm/iommu_table.h> #include <trace/events/intel_iommu.h> #include "../irq_remapping.h" @@ -912,7 +911,7 @@ dmar_validate_one_drhd(struct acpi_dmar_header *entry, void *arg) return 0; } -int __init detect_intel_iommu(void) +void __init detect_intel_iommu(void) { int ret; struct dmar_res_callback validate_drhd_cb = { @@ -945,8 +944,6 @@ int __init detect_intel_iommu(void) dmar_tbl = NULL; } up_write(&dmar_global_lock); - - return ret ? ret : 1; } static void unmap_iommu(struct intel_iommu *iommu) @@ -2164,7 +2161,6 @@ static int __init dmar_free_unused_resources(void) } late_initcall(dmar_free_unused_resources); -IOMMU_INIT_POST(detect_intel_iommu); /* * DMAR Hotplug Support diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 47aebd98f52f..67aa74d20162 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -36,7 +36,6 @@ #include <xen/hvc-console.h> #include <asm/dma-mapping.h> -#include <asm/xen/page-coherent.h> #include <trace/events/swiotlb.h> #define MAX_DMA_BITS 32 @@ -104,7 +103,8 @@ static int is_xen_swiotlb_buffer(struct device *dev, dma_addr_t dma_addr) return 0; } -static int xen_swiotlb_fixup(void *buf, unsigned long nslabs) +#ifdef CONFIG_X86 +int xen_swiotlb_fixup(void *buf, unsigned long nslabs) { int rc; unsigned int order = get_order(IO_TLB_SEGSIZE << IO_TLB_SHIFT); @@ -130,223 +130,59 @@ static int xen_swiotlb_fixup(void *buf, unsigned long nslabs) return 0; } -enum xen_swiotlb_err { - XEN_SWIOTLB_UNKNOWN = 0, - XEN_SWIOTLB_ENOMEM, - XEN_SWIOTLB_EFIXUP -}; - -static const char *xen_swiotlb_error(enum xen_swiotlb_err err) -{ - switch (err) { - case XEN_SWIOTLB_ENOMEM: - return "Cannot allocate Xen-SWIOTLB buffer\n"; - case XEN_SWIOTLB_EFIXUP: - return "Failed to get contiguous memory for DMA from Xen!\n"\ - "You either: don't have the permissions, do not have"\ - " enough free memory under 4GB, or the hypervisor memory"\ - " is too fragmented!"; - default: - break; - } - return ""; -} - -int xen_swiotlb_init(void) -{ - enum xen_swiotlb_err m_ret = XEN_SWIOTLB_UNKNOWN; - unsigned long bytes = swiotlb_size_or_default(); - unsigned long nslabs = bytes >> IO_TLB_SHIFT; - unsigned int order, repeat = 3; - int rc = -ENOMEM; - char *start; - - if (io_tlb_default_mem.nslabs) { - pr_warn("swiotlb buffer already initialized\n"); - return -EEXIST; - } - -retry: - m_ret = XEN_SWIOTLB_ENOMEM; - order = get_order(bytes); - - /* - * Get IO TLB memory from any location. - */ -#define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT)) -#define IO_TLB_MIN_SLABS ((1<<20) >> IO_TLB_SHIFT) - while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) { - start = (void *)xen_get_swiotlb_free_pages(order); - if (start) - break; - order--; - } - if (!start) - goto exit; - if (order != get_order(bytes)) { - pr_warn("Warning: only able to allocate %ld MB for software IO TLB\n", - (PAGE_SIZE << order) >> 20); - nslabs = SLABS_PER_PAGE << order; - bytes = nslabs << IO_TLB_SHIFT; - } - - /* - * And replace that memory with pages under 4GB. - */ - rc = xen_swiotlb_fixup(start, nslabs); - if (rc) { - free_pages((unsigned long)start, order); - m_ret = XEN_SWIOTLB_EFIXUP; - goto error; - } - rc = swiotlb_late_init_with_tbl(start, nslabs); - if (rc) - return rc; - swiotlb_set_max_segment(PAGE_SIZE); - return 0; -error: - if (nslabs > 1024 && repeat--) { - /* Min is 2MB */ - nslabs = max(1024UL, ALIGN(nslabs >> 1, IO_TLB_SEGSIZE)); - bytes = nslabs << IO_TLB_SHIFT; - pr_info("Lowering to %luMB\n", bytes >> 20); - goto retry; - } -exit: - pr_err("%s (rc:%d)\n", xen_swiotlb_error(m_ret), rc); - return rc; -} - -#ifdef CONFIG_X86 -void __init xen_swiotlb_init_early(void) -{ - unsigned long bytes = swiotlb_size_or_default(); - unsigned long nslabs = bytes >> IO_TLB_SHIFT; - unsigned int repeat = 3; - char *start; - int rc; - -retry: - /* - * Get IO TLB memory from any location. - */ - start = memblock_alloc(PAGE_ALIGN(bytes), - IO_TLB_SEGSIZE << IO_TLB_SHIFT); - if (!start) - panic("%s: Failed to allocate %lu bytes\n", - __func__, PAGE_ALIGN(bytes)); - - /* - * And replace that memory with pages under 4GB. - */ - rc = xen_swiotlb_fixup(start, nslabs); - if (rc) { - memblock_free(start, PAGE_ALIGN(bytes)); - if (nslabs > 1024 && repeat--) { - /* Min is 2MB */ - nslabs = max(1024UL, ALIGN(nslabs >> 1, IO_TLB_SEGSIZE)); - bytes = nslabs << IO_TLB_SHIFT; - pr_info("Lowering to %luMB\n", bytes >> 20); - goto retry; - } - panic("%s (rc:%d)", xen_swiotlb_error(XEN_SWIOTLB_EFIXUP), rc); - } - - if (swiotlb_init_with_tbl(start, nslabs, true)) - panic("Cannot allocate SWIOTLB buffer"); - swiotlb_set_max_segment(PAGE_SIZE); -} -#endif /* CONFIG_X86 */ - static void * -xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size, - dma_addr_t *dma_handle, gfp_t flags, - unsigned long attrs) +xen_swiotlb_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs) { - void *ret; + u64 dma_mask = dev->coherent_dma_mask; int order = get_order(size); - u64 dma_mask = DMA_BIT_MASK(32); phys_addr_t phys; - dma_addr_t dev_addr; - - /* - * Ignore region specifiers - the kernel's ideas of - * pseudo-phys memory layout has nothing to do with the - * machine physical layout. We can't allocate highmem - * because we can't return a pointer to it. - */ - flags &= ~(__GFP_DMA | __GFP_HIGHMEM); + void *ret; - /* Convert the size to actually allocated. */ + /* Align the allocation to the Xen page size */ size = 1UL << (order + XEN_PAGE_SHIFT); - /* On ARM this function returns an ioremap'ped virtual address for - * which virt_to_phys doesn't return the corresponding physical - * address. In fact on ARM virt_to_phys only works for kernel direct - * mapped RAM memory. Also see comment below. - */ - ret = xen_alloc_coherent_pages(hwdev, size, dma_handle, flags, attrs); - + ret = (void *)__get_free_pages(flags, get_order(size)); if (!ret) return ret; - - if (hwdev && hwdev->coherent_dma_mask) - dma_mask = hwdev->coherent_dma_mask; - - /* At this point dma_handle is the dma address, next we are - * going to set it to the machine address. - * Do not use virt_to_phys(ret) because on ARM it doesn't correspond - * to *dma_handle. */ - phys = dma_to_phys(hwdev, *dma_handle); - dev_addr = xen_phys_to_dma(hwdev, phys); - if (((dev_addr + size - 1 <= dma_mask)) && - !range_straddles_page_boundary(phys, size)) - *dma_handle = dev_addr; - else { - if (xen_create_contiguous_region(phys, order, - fls64(dma_mask), dma_handle) != 0) { - xen_free_coherent_pages(hwdev, size, ret, (dma_addr_t)phys, attrs); - return NULL; - } - *dma_handle = phys_to_dma(hwdev, *dma_handle); + phys = virt_to_phys(ret); + + *dma_handle = xen_phys_to_dma(dev, phys); + if (*dma_handle + size - 1 > dma_mask || + range_straddles_page_boundary(phys, size)) { + if (xen_create_contiguous_region(phys, order, fls64(dma_mask), + dma_handle) != 0) + goto out_free_pages; SetPageXenRemapped(virt_to_page(ret)); } + memset(ret, 0, size); return ret; + +out_free_pages: + free_pages((unsigned long)ret, get_order(size)); + return NULL; } static void -xen_swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr, - dma_addr_t dev_addr, unsigned long attrs) +xen_swiotlb_free_coherent(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_handle, unsigned long attrs) { + phys_addr_t phys = virt_to_phys(vaddr); int order = get_order(size); - phys_addr_t phys; - u64 dma_mask = DMA_BIT_MASK(32); - struct page *page; - - if (hwdev && hwdev->coherent_dma_mask) - dma_mask = hwdev->coherent_dma_mask; - - /* do not use virt_to_phys because on ARM it doesn't return you the - * physical address */ - phys = xen_dma_to_phys(hwdev, dev_addr); /* Convert the size to actually allocated. */ size = 1UL << (order + XEN_PAGE_SHIFT); - if (is_vmalloc_addr(vaddr)) - page = vmalloc_to_page(vaddr); - else - page = virt_to_page(vaddr); + if (WARN_ON_ONCE(dma_handle + size - 1 > dev->coherent_dma_mask) || + WARN_ON_ONCE(range_straddles_page_boundary(phys, size))) + return; - if (!WARN_ON((dev_addr + size - 1 > dma_mask) || - range_straddles_page_boundary(phys, size)) && - TestClearPageXenRemapped(page)) + if (TestClearPageXenRemapped(virt_to_page(vaddr))) xen_destroy_contiguous_region(phys, order); - - xen_free_coherent_pages(hwdev, size, vaddr, phys_to_dma(hwdev, phys), - attrs); + free_pages((unsigned long)vaddr, get_order(size)); } +#endif /* CONFIG_X86 */ /* * Map a single buffer of the indicated size for DMA in streaming mode. The @@ -378,7 +214,7 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, /* * Oh well, have to allocate and map a bounce buffer. */ - trace_swiotlb_bounced(dev, dev_addr, size, swiotlb_force); + trace_swiotlb_bounced(dev, dev_addr, size); map = swiotlb_tbl_map_single(dev, phys, size, size, 0, dir, attrs); if (map == (phys_addr_t)DMA_MAPPING_ERROR) @@ -549,8 +385,13 @@ xen_swiotlb_dma_supported(struct device *hwdev, u64 mask) } const struct dma_map_ops xen_swiotlb_dma_ops = { +#ifdef CONFIG_X86 .alloc = xen_swiotlb_alloc_coherent, .free = xen_swiotlb_free_coherent, +#else + .alloc = dma_direct_alloc, + .free = dma_direct_free, +#endif .sync_single_for_cpu = xen_swiotlb_sync_single_for_cpu, .sync_single_for_device = xen_swiotlb_sync_single_for_device, .sync_sg_for_cpu = xen_swiotlb_sync_sg_for_cpu, diff --git a/include/linux/dmar.h b/include/linux/dmar.h index 45e903d84733..cbd714a198a0 100644 --- a/include/linux/dmar.h +++ b/include/linux/dmar.h @@ -121,7 +121,7 @@ extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info, u16 segment, struct dmar_dev_scope *devices, int count); /* Intel IOMMU detection */ -extern int detect_intel_iommu(void); +void detect_intel_iommu(void); extern int enable_drhd_fault_handling(void); extern int dmar_device_add(acpi_handle handle); extern int dmar_device_remove(acpi_handle handle); @@ -197,6 +197,10 @@ static inline bool dmar_platform_optin(void) return false; } +static inline void detect_intel_iommu(void) +{ +} + #endif /* CONFIG_DMAR_TABLE */ struct irte { diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index f6c3638255d5..7ed35dd3de6e 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -13,11 +13,9 @@ struct device; struct page; struct scatterlist; -enum swiotlb_force { - SWIOTLB_NORMAL, /* Default - depending on HW DMA mask etc. */ - SWIOTLB_FORCE, /* swiotlb=force */ - SWIOTLB_NO_FORCE, /* swiotlb=noforce */ -}; +#define SWIOTLB_VERBOSE (1 << 0) /* verbose initialization */ +#define SWIOTLB_FORCE (1 << 1) /* force bounce buffering */ +#define SWIOTLB_ANY (1 << 2) /* allow any memory for the buffer */ /* * Maximum allowable number of contiguous slabs to map, @@ -36,11 +34,11 @@ enum swiotlb_force { /* default to 64MB */ #define IO_TLB_DEFAULT_SIZE (64UL<<20) -extern void swiotlb_init(int verbose); -int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose); unsigned long swiotlb_size_or_default(void); -extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs); -extern int swiotlb_late_init_with_default_size(size_t default_size); +void __init swiotlb_init_remap(bool addressing_limit, unsigned int flags, + int (*remap)(void *tlb, unsigned long nslabs)); +int swiotlb_init_late(size_t size, gfp_t gfp_mask, + int (*remap)(void *tlb, unsigned long nslabs)); extern void __init swiotlb_update_mem_attributes(void); phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t phys, @@ -126,13 +124,16 @@ static inline bool is_swiotlb_force_bounce(struct device *dev) return mem && mem->force_bounce; } +void swiotlb_init(bool addressing_limited, unsigned int flags); void __init swiotlb_exit(void); unsigned int swiotlb_max_segment(void); size_t swiotlb_max_mapping_size(struct device *dev); bool is_swiotlb_active(struct device *dev); void __init swiotlb_adjust_size(unsigned long size); #else -#define swiotlb_force SWIOTLB_NO_FORCE +static inline void swiotlb_init(bool addressing_limited, unsigned int flags) +{ +} static inline bool is_swiotlb_buffer(struct device *dev, phys_addr_t paddr) { return false; @@ -164,7 +165,6 @@ static inline void swiotlb_adjust_size(unsigned long size) #endif /* CONFIG_SWIOTLB */ extern void swiotlb_print_info(void); -extern void swiotlb_set_max_segment(unsigned int); #ifdef CONFIG_DMA_RESTRICTED_POOL struct page *swiotlb_alloc(struct device *dev, size_t size); diff --git a/include/trace/events/swiotlb.h b/include/trace/events/swiotlb.h index 705be43b71ab..da05c9ebd224 100644 --- a/include/trace/events/swiotlb.h +++ b/include/trace/events/swiotlb.h @@ -8,20 +8,15 @@ #include <linux/tracepoint.h> TRACE_EVENT(swiotlb_bounced, - - TP_PROTO(struct device *dev, - dma_addr_t dev_addr, - size_t size, - enum swiotlb_force swiotlb_force), - - TP_ARGS(dev, dev_addr, size, swiotlb_force), + TP_PROTO(struct device *dev, dma_addr_t dev_addr, size_t size), + TP_ARGS(dev, dev_addr, size), TP_STRUCT__entry( - __string( dev_name, dev_name(dev) ) - __field( u64, dma_mask ) - __field( dma_addr_t, dev_addr ) - __field( size_t, size ) - __field( enum swiotlb_force, swiotlb_force ) + __string(dev_name, dev_name(dev)) + __field(u64, dma_mask) + __field(dma_addr_t, dev_addr) + __field(size_t, size) + __field(bool, force) ), TP_fast_assign( @@ -29,19 +24,15 @@ TRACE_EVENT(swiotlb_bounced, __entry->dma_mask = (dev->dma_mask ? *dev->dma_mask : 0); __entry->dev_addr = dev_addr; __entry->size = size; - __entry->swiotlb_force = swiotlb_force; + __entry->force = is_swiotlb_force_bounce(dev); ), - TP_printk("dev_name: %s dma_mask=%llx dev_addr=%llx " - "size=%zu %s", + TP_printk("dev_name: %s dma_mask=%llx dev_addr=%llx size=%zu %s", __get_str(dev_name), __entry->dma_mask, (unsigned long long)__entry->dev_addr, __entry->size, - __print_symbolic(__entry->swiotlb_force, - { SWIOTLB_NORMAL, "NORMAL" }, - { SWIOTLB_FORCE, "FORCE" }, - { SWIOTLB_NO_FORCE, "NO_FORCE" })) + __entry->force ? "FORCE" : "NORMAL") ); #endif /* _TRACE_SWIOTLB_H */ diff --git a/include/xen/arm/page-coherent.h b/include/xen/arm/page-coherent.h deleted file mode 100644 index b9cc11e887ed..000000000000 --- a/include/xen/arm/page-coherent.h +++ /dev/null @@ -1,20 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _XEN_ARM_PAGE_COHERENT_H -#define _XEN_ARM_PAGE_COHERENT_H - -#include <linux/dma-mapping.h> -#include <asm/page.h> - -static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size, - dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs) -{ - return dma_direct_alloc(hwdev, size, dma_handle, flags, attrs); -} - -static inline void xen_free_coherent_pages(struct device *hwdev, size_t size, - void *cpu_addr, dma_addr_t dma_handle, unsigned long attrs) -{ - dma_direct_free(hwdev, size, cpu_addr, dma_handle, attrs); -} - -#endif /* _XEN_ARM_PAGE_COHERENT_H */ diff --git a/include/xen/arm/page.h b/include/xen/arm/page.h index ac1b65470563..7e199c6656b9 100644 --- a/include/xen/arm/page.h +++ b/include/xen/arm/page.h @@ -115,6 +115,5 @@ static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn) bool xen_arch_need_swiotlb(struct device *dev, phys_addr_t phys, dma_addr_t dev_addr); -unsigned long xen_get_swiotlb_free_pages(unsigned int order); #endif /* _ASM_ARM_XEN_PAGE_H */ diff --git a/include/xen/swiotlb-xen.h b/include/xen/swiotlb-xen.h index b3e647f86e3e..808d17ad8d57 100644 --- a/include/xen/swiotlb-xen.h +++ b/include/xen/swiotlb-xen.h @@ -10,8 +10,6 @@ void xen_dma_sync_for_cpu(struct device *dev, dma_addr_t handle, void xen_dma_sync_for_device(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir); -int xen_swiotlb_init(void); -void __init xen_swiotlb_init_early(void); extern const struct dma_map_ops xen_swiotlb_dma_ops; #endif /* __LINUX_SWIOTLB_XEN_H */ diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h index a3584a357f35..c7c1b46ff4cd 100644 --- a/include/xen/xen-ops.h +++ b/include/xen/xen-ops.h @@ -42,13 +42,6 @@ int xen_setup_shutdown_event(void); extern unsigned long *xen_contiguous_bitmap; -#if defined(CONFIG_XEN_PV) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) -int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order, - unsigned int address_bits, - dma_addr_t *dma_handle); -void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order); -#endif - #if defined(CONFIG_XEN_PV) int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot, diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c index f8ff598596b8..ac740630c79c 100644 --- a/kernel/dma/debug.c +++ b/kernel/dma/debug.c @@ -448,7 +448,7 @@ void debug_dma_dump_mappings(struct device *dev) * other hand, consumes a single dma_debug_entry, but inserts 'nents' * entries into the tree. */ -static RADIX_TREE(dma_active_cacheline, GFP_NOWAIT); +static RADIX_TREE(dma_active_cacheline, GFP_ATOMIC); static DEFINE_SPINLOCK(radix_lock); #define ACTIVE_CACHELINE_MAX_OVERLAP ((1 << RADIX_TREE_MAX_TAGS) - 1) #define CACHELINE_PER_PAGE_SHIFT (PAGE_SHIFT - L1_CACHE_SHIFT) diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 9743c6ccce1a..e978f36e6be8 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -79,7 +79,7 @@ static int dma_set_decrypted(struct device *dev, void *vaddr, size_t size) { if (!force_dma_unencrypted(dev)) return 0; - return set_memory_decrypted((unsigned long)vaddr, 1 << get_order(size)); + return set_memory_decrypted((unsigned long)vaddr, PFN_UP(size)); } static int dma_set_encrypted(struct device *dev, void *vaddr, size_t size) @@ -88,7 +88,7 @@ static int dma_set_encrypted(struct device *dev, void *vaddr, size_t size) if (!force_dma_unencrypted(dev)) return 0; - ret = set_memory_encrypted((unsigned long)vaddr, 1 << get_order(size)); + ret = set_memory_encrypted((unsigned long)vaddr, PFN_UP(size)); if (ret) pr_warn_ratelimited("leaking DMA memory that can't be re-encrypted\n"); return ret; @@ -115,7 +115,7 @@ static struct page *dma_direct_alloc_swiotlb(struct device *dev, size_t size) } static struct page *__dma_direct_alloc_pages(struct device *dev, size_t size, - gfp_t gfp) + gfp_t gfp, bool allow_highmem) { int node = dev_to_node(dev); struct page *page = NULL; @@ -129,9 +129,12 @@ static struct page *__dma_direct_alloc_pages(struct device *dev, size_t size, gfp |= dma_direct_optimal_gfp_mask(dev, dev->coherent_dma_mask, &phys_limit); page = dma_alloc_contiguous(dev, size, gfp); - if (page && !dma_coherent_ok(dev, page_to_phys(page), size)) { - dma_free_contiguous(dev, page, size); - page = NULL; + if (page) { + if (!dma_coherent_ok(dev, page_to_phys(page), size) || + (!allow_highmem && PageHighMem(page))) { + dma_free_contiguous(dev, page, size); + page = NULL; + } } again: if (!page) @@ -189,7 +192,7 @@ static void *dma_direct_alloc_no_mapping(struct device *dev, size_t size, { struct page *page; - page = __dma_direct_alloc_pages(dev, size, gfp & ~__GFP_ZERO); + page = __dma_direct_alloc_pages(dev, size, gfp & ~__GFP_ZERO, true); if (!page) return NULL; @@ -262,7 +265,7 @@ void *dma_direct_alloc(struct device *dev, size_t size, return dma_direct_alloc_from_pool(dev, size, dma_handle, gfp); /* we always manually zero the memory once we are done */ - page = __dma_direct_alloc_pages(dev, size, gfp & ~__GFP_ZERO); + page = __dma_direct_alloc_pages(dev, size, gfp & ~__GFP_ZERO, true); if (!page) return NULL; @@ -370,19 +373,9 @@ struct page *dma_direct_alloc_pages(struct device *dev, size_t size, if (force_dma_unencrypted(dev) && dma_direct_use_pool(dev, gfp)) return dma_direct_alloc_from_pool(dev, size, dma_handle, gfp); - page = __dma_direct_alloc_pages(dev, size, gfp); + page = __dma_direct_alloc_pages(dev, size, gfp, false); if (!page) return NULL; - if (PageHighMem(page)) { - /* - * Depending on the cma= arguments and per-arch setup - * dma_alloc_contiguous could return highmem pages. - * Without remapping there is no way to return them here, - * so log an error and fail. - */ - dev_info(dev, "Rejecting highmem page from CMA.\n"); - goto out_free_pages; - } ret = page_address(page); if (dma_set_decrypted(dev, ret, size)) diff --git a/kernel/dma/direct.h b/kernel/dma/direct.h index 8a6cd53dbe8c..a78c0ba70645 100644 --- a/kernel/dma/direct.h +++ b/kernel/dma/direct.h @@ -91,7 +91,7 @@ static inline dma_addr_t dma_direct_map_page(struct device *dev, return swiotlb_map(dev, phys, size, dir, attrs); if (unlikely(!dma_capable(dev, dma_addr, size, true))) { - if (swiotlb_force != SWIOTLB_NO_FORCE) + if (is_swiotlb_active(dev)) return swiotlb_map(dev, phys, size, dir, attrs); dev_WARN_ONCE(dev, 1, diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 73a41cec9e38..dfa1de89dc94 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -62,18 +62,13 @@ #define INVALID_PHYS_ADDR (~(phys_addr_t)0) -enum swiotlb_force swiotlb_force; +static bool swiotlb_force_bounce; +static bool swiotlb_force_disable; struct io_tlb_mem io_tlb_default_mem; phys_addr_t swiotlb_unencrypted_base; -/* - * Max segment that we can provide which (if pages are contingous) will - * not be bounced (unless SWIOTLB_FORCE is set). - */ -static unsigned int max_segment; - static unsigned long default_nslabs = IO_TLB_DEFAULT_SIZE >> IO_TLB_SHIFT; static int __init @@ -87,9 +82,9 @@ setup_io_tlb_npages(char *str) if (*str == ',') ++str; if (!strcmp(str, "force")) - swiotlb_force = SWIOTLB_FORCE; + swiotlb_force_bounce = true; else if (!strcmp(str, "noforce")) - swiotlb_force = SWIOTLB_NO_FORCE; + swiotlb_force_disable = true; return 0; } @@ -97,18 +92,12 @@ early_param("swiotlb", setup_io_tlb_npages); unsigned int swiotlb_max_segment(void) { - return io_tlb_default_mem.nslabs ? max_segment : 0; + if (!io_tlb_default_mem.nslabs) + return 0; + return rounddown(io_tlb_default_mem.nslabs << IO_TLB_SHIFT, PAGE_SIZE); } EXPORT_SYMBOL_GPL(swiotlb_max_segment); -void swiotlb_set_max_segment(unsigned int val) -{ - if (swiotlb_force == SWIOTLB_FORCE) - max_segment = 1; - else - max_segment = rounddown(val, PAGE_SIZE); -} - unsigned long swiotlb_size_or_default(void) { return default_nslabs << IO_TLB_SHIFT; @@ -214,7 +203,7 @@ static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start, mem->index = 0; mem->late_alloc = late_alloc; - if (swiotlb_force == SWIOTLB_FORCE) + if (swiotlb_force_bounce) mem->force_bounce = true; spin_lock_init(&mem->lock); @@ -236,17 +225,49 @@ static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start, return; } -int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) +/* + * Statically reserve bounce buffer space and initialize bounce buffer data + * structures for the software IO TLB used to implement the DMA API. + */ +void __init swiotlb_init_remap(bool addressing_limit, unsigned int flags, + int (*remap)(void *tlb, unsigned long nslabs)) { struct io_tlb_mem *mem = &io_tlb_default_mem; + unsigned long nslabs = default_nslabs; size_t alloc_size; + size_t bytes; + void *tlb; - if (swiotlb_force == SWIOTLB_NO_FORCE) - return 0; + if (!addressing_limit && !swiotlb_force_bounce) + return; + if (swiotlb_force_disable) + return; - /* protect against double initialization */ - if (WARN_ON_ONCE(mem->nslabs)) - return -ENOMEM; + /* + * By default allocate the bounce buffer memory from low memory, but + * allow to pick a location everywhere for hypervisors with guest + * memory encryption. + */ +retry: + bytes = PAGE_ALIGN(nslabs << IO_TLB_SHIFT); + if (flags & SWIOTLB_ANY) + tlb = memblock_alloc(bytes, PAGE_SIZE); + else + tlb = memblock_alloc_low(bytes, PAGE_SIZE); + if (!tlb) { + pr_warn("%s: failed to allocate tlb structure\n", __func__); + return; + } + + if (remap && remap(tlb, nslabs) < 0) { + memblock_free(tlb, PAGE_ALIGN(bytes)); + + nslabs = ALIGN(nslabs >> 1, IO_TLB_SEGSIZE); + if (nslabs < IO_TLB_MIN_SLABS) + panic("%s: Failed to remap %zu bytes\n", + __func__, bytes); + goto retry; + } alloc_size = PAGE_ALIGN(array_size(sizeof(*mem->slots), nslabs)); mem->slots = memblock_alloc(alloc_size, PAGE_SIZE); @@ -255,38 +276,15 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) __func__, alloc_size, PAGE_SIZE); swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false); + mem->force_bounce = flags & SWIOTLB_FORCE; - if (verbose) + if (flags & SWIOTLB_VERBOSE) swiotlb_print_info(); - swiotlb_set_max_segment(mem->nslabs << IO_TLB_SHIFT); - return 0; } -/* - * Statically reserve bounce buffer space and initialize bounce buffer data - * structures for the software IO TLB used to implement the DMA API. - */ -void __init -swiotlb_init(int verbose) +void __init swiotlb_init(bool addressing_limit, unsigned int flags) { - size_t bytes = PAGE_ALIGN(default_nslabs << IO_TLB_SHIFT); - void *tlb; - - if (swiotlb_force == SWIOTLB_NO_FORCE) - return; - - /* Get IO TLB memory from the low pages */ - tlb = memblock_alloc_low(bytes, PAGE_SIZE); - if (!tlb) - goto fail; - if (swiotlb_init_with_tbl(tlb, default_nslabs, verbose)) - goto fail_free_mem; - return; - -fail_free_mem: - memblock_free(tlb, bytes); -fail: - pr_warn("Cannot allocate buffer"); + return swiotlb_init_remap(addressing_limit, flags, NULL); } /* @@ -294,72 +292,65 @@ fail: * initialize the swiotlb later using the slab allocator if needed. * This should be just like above, but with some error catching. */ -int -swiotlb_late_init_with_default_size(size_t default_size) +int swiotlb_init_late(size_t size, gfp_t gfp_mask, + int (*remap)(void *tlb, unsigned long nslabs)) { - unsigned long nslabs = - ALIGN(default_size >> IO_TLB_SHIFT, IO_TLB_SEGSIZE); - unsigned long bytes; + struct io_tlb_mem *mem = &io_tlb_default_mem; + unsigned long nslabs = ALIGN(size >> IO_TLB_SHIFT, IO_TLB_SEGSIZE); unsigned char *vstart = NULL; unsigned int order; + bool retried = false; int rc = 0; - if (swiotlb_force == SWIOTLB_NO_FORCE) + if (swiotlb_force_disable) return 0; - /* - * Get IO TLB memory from the low pages - */ +retry: order = get_order(nslabs << IO_TLB_SHIFT); nslabs = SLABS_PER_PAGE << order; - bytes = nslabs << IO_TLB_SHIFT; while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) { - vstart = (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, + vstart = (void *)__get_free_pages(gfp_mask | __GFP_NOWARN, order); if (vstart) break; order--; + nslabs = SLABS_PER_PAGE << order; + retried = true; } if (!vstart) return -ENOMEM; - if (order != get_order(bytes)) { - pr_warn("only able to allocate %ld MB\n", - (PAGE_SIZE << order) >> 20); - nslabs = SLABS_PER_PAGE << order; - } - rc = swiotlb_late_init_with_tbl(vstart, nslabs); - if (rc) + if (remap) + rc = remap(vstart, nslabs); + if (rc) { free_pages((unsigned long)vstart, order); - return rc; -} - -int -swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) -{ - struct io_tlb_mem *mem = &io_tlb_default_mem; - unsigned long bytes = nslabs << IO_TLB_SHIFT; - - if (swiotlb_force == SWIOTLB_NO_FORCE) - return 0; + nslabs = ALIGN(nslabs >> 1, IO_TLB_SEGSIZE); + if (nslabs < IO_TLB_MIN_SLABS) + return rc; + retried = true; + goto retry; + } - /* protect against double initialization */ - if (WARN_ON_ONCE(mem->nslabs)) - return -ENOMEM; + if (retried) { + pr_warn("only able to allocate %ld MB\n", + (PAGE_SIZE << order) >> 20); + } mem->slots = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(array_size(sizeof(*mem->slots), nslabs))); - if (!mem->slots) + if (!mem->slots) { + free_pages((unsigned long)vstart, order); return -ENOMEM; + } - set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT); - swiotlb_init_io_tlb_mem(mem, virt_to_phys(tlb), nslabs, true); + set_memory_decrypted((unsigned long)vstart, + (nslabs << IO_TLB_SHIFT) >> PAGE_SHIFT); + swiotlb_init_io_tlb_mem(mem, virt_to_phys(vstart), nslabs, true); swiotlb_print_info(); - swiotlb_set_max_segment(mem->nslabs << IO_TLB_SHIFT); return 0; } @@ -369,6 +360,9 @@ void __init swiotlb_exit(void) unsigned long tbl_vaddr; size_t tbl_size, slots_size; + if (swiotlb_force_bounce) + return; + if (!mem->nslabs) return; @@ -717,8 +711,7 @@ dma_addr_t swiotlb_map(struct device *dev, phys_addr_t paddr, size_t size, phys_addr_t swiotlb_addr; dma_addr_t dma_addr; - trace_swiotlb_bounced(dev, phys_to_dma(dev, paddr), size, - swiotlb_force); + trace_swiotlb_bounced(dev, phys_to_dma(dev, paddr), size); swiotlb_addr = swiotlb_tbl_map_single(dev, paddr, size, size, 0, dir, attrs); @@ -743,7 +736,18 @@ dma_addr_t swiotlb_map(struct device *dev, phys_addr_t paddr, size_t size, size_t swiotlb_max_mapping_size(struct device *dev) { - return ((size_t)IO_TLB_SIZE) * IO_TLB_SEGSIZE; + int min_align_mask = dma_get_min_align_mask(dev); + int min_align = 0; + + /* + * swiotlb_find_slots() skips slots according to + * min align mask. This affects max mapping size. + * Take it into acount here. + */ + if (min_align_mask) + min_align = roundup(min_align_mask, IO_TLB_SIZE); + + return ((size_t)IO_TLB_SIZE) * IO_TLB_SEGSIZE - min_align; } bool is_swiotlb_active(struct device *dev) |