This patch converts several swiotlb related variables to arrays, in order to maintain stat/status for different swiotlb buffers. Here are variables involved:
- io_tlb_start and io_tlb_end - io_tlb_nslabs and io_tlb_used - io_tlb_list - io_tlb_index - max_segment - io_tlb_orig_addr - no_iotlb_memory
There is no functional change and this is to prepare to enable 64-bit swiotlb.
Cc: Joe Jin joe.jin@oracle.com Signed-off-by: Dongli Zhang dongli.zhang@oracle.com --- arch/powerpc/platforms/pseries/svm.c | 6 +- drivers/xen/swiotlb-xen.c | 4 +- include/linux/swiotlb.h | 5 +- kernel/dma/swiotlb.c | 257 ++++++++++++++------------- 4 files changed, 140 insertions(+), 132 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/svm.c b/arch/powerpc/platforms/pseries/svm.c index 7b739cc7a8a9..9f8842d0da1f 100644 --- a/arch/powerpc/platforms/pseries/svm.c +++ b/arch/powerpc/platforms/pseries/svm.c @@ -55,9 +55,9 @@ void __init svm_swiotlb_init(void) if (vstart && !swiotlb_init_with_tbl(vstart, io_tlb_nslabs, false)) return;
- if (io_tlb_start) - memblock_free_early(io_tlb_start, - PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT)); + if (io_tlb_start[SWIOTLB_LO]) + memblock_free_early(io_tlb_start[SWIOTLB_LO], + PAGE_ALIGN(io_tlb_nslabs[SWIOTLB_LO] << IO_TLB_SHIFT)); panic("SVM: Cannot allocate SWIOTLB buffer"); }
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 2b385c1b4a99..3261880ad859 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -192,8 +192,8 @@ int __ref xen_swiotlb_init(int verbose, bool early) /* * IO TLB memory already allocated. Just use it. */ - if (io_tlb_start != 0) { - xen_io_tlb_start = phys_to_virt(io_tlb_start); + if (io_tlb_start[SWIOTLB_LO] != 0) { + xen_io_tlb_start = phys_to_virt(io_tlb_start[SWIOTLB_LO]); goto end; }
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index ca125c1b1281..777046cd4d1b 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -76,11 +76,12 @@ dma_addr_t swiotlb_map(struct device *dev, phys_addr_t phys,
#ifdef CONFIG_SWIOTLB extern enum swiotlb_force swiotlb_force; -extern phys_addr_t io_tlb_start, io_tlb_end; +extern phys_addr_t io_tlb_start[], io_tlb_end[];
static inline bool is_swiotlb_buffer(phys_addr_t paddr) { - return paddr >= io_tlb_start && paddr < io_tlb_end; + return paddr >= io_tlb_start[SWIOTLB_LO] && + paddr < io_tlb_end[SWIOTLB_LO]; }
void __init swiotlb_exit(void); diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 7c42df6e6100..1fbb65daa2dd 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -69,38 +69,38 @@ enum swiotlb_force swiotlb_force; * swiotlb_tbl_sync_single_*, to see if the memory was in fact allocated by this * API. */ -phys_addr_t io_tlb_start, io_tlb_end; +phys_addr_t io_tlb_start[SWIOTLB_MAX], io_tlb_end[SWIOTLB_MAX];
/* * The number of IO TLB blocks (in groups of 64) between io_tlb_start and * io_tlb_end. This is command line adjustable via setup_io_tlb_npages. */ -static unsigned long io_tlb_nslabs; +static unsigned long io_tlb_nslabs[SWIOTLB_MAX];
/* * The number of used IO TLB block */ -static unsigned long io_tlb_used; +static unsigned long io_tlb_used[SWIOTLB_MAX];
/* * This is a free list describing the number of free entries available from * each index */ -static unsigned int *io_tlb_list; -static unsigned int io_tlb_index; +static unsigned int *io_tlb_list[SWIOTLB_MAX]; +static unsigned int io_tlb_index[SWIOTLB_MAX];
/* * 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 int max_segment[SWIOTLB_MAX];
/* * We need to save away the original address corresponding to a mapped entry * for the sync operations. */ #define INVALID_PHYS_ADDR (~(phys_addr_t)0) -static phys_addr_t *io_tlb_orig_addr; +static phys_addr_t *io_tlb_orig_addr[SWIOTLB_MAX];
/* * Protect the above data structures in the map and unmap calls @@ -113,9 +113,9 @@ static int __init setup_io_tlb_npages(char *str) { if (isdigit(*str)) { - io_tlb_nslabs = simple_strtoul(str, &str, 0); + io_tlb_nslabs[SWIOTLB_LO] = simple_strtoul(str, &str, 0); /* avoid tail segment of size < IO_TLB_SEGSIZE */ - io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE); + io_tlb_nslabs[SWIOTLB_LO] = ALIGN(io_tlb_nslabs[SWIOTLB_LO], IO_TLB_SEGSIZE); } if (*str == ',') ++str; @@ -123,40 +123,40 @@ setup_io_tlb_npages(char *str) swiotlb_force = SWIOTLB_FORCE; } else if (!strcmp(str, "noforce")) { swiotlb_force = SWIOTLB_NO_FORCE; - io_tlb_nslabs = 1; + io_tlb_nslabs[SWIOTLB_LO] = 1; }
return 0; } early_param("swiotlb", setup_io_tlb_npages);
-static bool no_iotlb_memory; +static bool no_iotlb_memory[SWIOTLB_MAX];
unsigned long swiotlb_nr_tbl(void) { - return unlikely(no_iotlb_memory) ? 0 : io_tlb_nslabs; + return unlikely(no_iotlb_memory[SWIOTLB_LO]) ? 0 : io_tlb_nslabs[SWIOTLB_LO]; } EXPORT_SYMBOL_GPL(swiotlb_nr_tbl);
unsigned int swiotlb_max_segment(void) { - return unlikely(no_iotlb_memory) ? 0 : max_segment; + return unlikely(no_iotlb_memory[SWIOTLB_LO]) ? 0 : max_segment[SWIOTLB_LO]; } EXPORT_SYMBOL_GPL(swiotlb_max_segment);
void swiotlb_set_max_segment(unsigned int val) { if (swiotlb_force == SWIOTLB_FORCE) - max_segment = 1; + max_segment[SWIOTLB_LO] = 1; else - max_segment = rounddown(val, PAGE_SIZE); + max_segment[SWIOTLB_LO] = rounddown(val, PAGE_SIZE); }
unsigned long swiotlb_size_or_default(void) { unsigned long size;
- size = io_tlb_nslabs << IO_TLB_SHIFT; + size = io_tlb_nslabs[SWIOTLB_LO] << IO_TLB_SHIFT;
return size ? size : (IO_TLB_DEFAULT_SIZE); } @@ -170,10 +170,10 @@ void __init swiotlb_adjust_size(unsigned long new_size) * architectures such as those supporting memory encryption to * adjust/expand SWIOTLB size for their use. */ - if (!io_tlb_nslabs) { + if (!io_tlb_nslabs[SWIOTLB_LO]) { size = ALIGN(new_size, 1 << IO_TLB_SHIFT); - io_tlb_nslabs = size >> IO_TLB_SHIFT; - io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE); + io_tlb_nslabs[SWIOTLB_LO] = size >> IO_TLB_SHIFT; + io_tlb_nslabs[SWIOTLB_LO] = ALIGN(io_tlb_nslabs[SWIOTLB_LO], IO_TLB_SEGSIZE);
pr_info("SWIOTLB bounce buffer size adjusted to %luMB", size >> 20); } @@ -181,15 +181,16 @@ void __init swiotlb_adjust_size(unsigned long new_size)
void swiotlb_print_info(void) { - unsigned long bytes = io_tlb_nslabs << IO_TLB_SHIFT; + unsigned long bytes = io_tlb_nslabs[SWIOTLB_LO] << IO_TLB_SHIFT;
- if (no_iotlb_memory) { + if (no_iotlb_memory[SWIOTLB_LO]) { pr_warn("No low mem\n"); return; }
- pr_info("mapped [mem %pa-%pa] (%luMB)\n", &io_tlb_start, &io_tlb_end, - bytes >> 20); + pr_info("mapped [mem %pa-%pa] (%luMB)\n", + &io_tlb_start[SWIOTLB_LO], &io_tlb_end[SWIOTLB_LO], + bytes >> 20); }
/* @@ -203,11 +204,11 @@ void __init swiotlb_update_mem_attributes(void) void *vaddr; unsigned long bytes;
- if (no_iotlb_memory || late_alloc) + if (no_iotlb_memory[SWIOTLB_LO] || late_alloc) return;
- vaddr = phys_to_virt(io_tlb_start); - bytes = PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT); + vaddr = phys_to_virt(io_tlb_start[SWIOTLB_LO]); + bytes = PAGE_ALIGN(io_tlb_nslabs[SWIOTLB_LO] << IO_TLB_SHIFT); set_memory_decrypted((unsigned long)vaddr, bytes >> PAGE_SHIFT); memset(vaddr, 0, bytes); } @@ -219,38 +220,38 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
bytes = nslabs << IO_TLB_SHIFT;
- io_tlb_nslabs = nslabs; - io_tlb_start = __pa(tlb); - io_tlb_end = io_tlb_start + bytes; + io_tlb_nslabs[SWIOTLB_LO] = nslabs; + io_tlb_start[SWIOTLB_LO] = __pa(tlb); + io_tlb_end[SWIOTLB_LO] = io_tlb_start[SWIOTLB_LO] + bytes;
/* * Allocate and initialize the free list array. This array is used * to find contiguous free memory regions of size up to IO_TLB_SEGSIZE * between io_tlb_start and io_tlb_end. */ - alloc_size = PAGE_ALIGN(io_tlb_nslabs * sizeof(int)); - io_tlb_list = memblock_alloc(alloc_size, PAGE_SIZE); - if (!io_tlb_list) + alloc_size = PAGE_ALIGN(io_tlb_nslabs[SWIOTLB_LO] * sizeof(int)); + io_tlb_list[SWIOTLB_LO] = memblock_alloc(alloc_size, PAGE_SIZE); + if (!io_tlb_list[SWIOTLB_LO]) panic("%s: Failed to allocate %zu bytes align=0x%lx\n", __func__, alloc_size, PAGE_SIZE);
- alloc_size = PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)); - io_tlb_orig_addr = memblock_alloc(alloc_size, PAGE_SIZE); - if (!io_tlb_orig_addr) + alloc_size = PAGE_ALIGN(io_tlb_nslabs[SWIOTLB_LO] * sizeof(phys_addr_t)); + io_tlb_orig_addr[SWIOTLB_LO] = memblock_alloc(alloc_size, PAGE_SIZE); + if (!io_tlb_orig_addr[SWIOTLB_LO]) panic("%s: Failed to allocate %zu bytes align=0x%lx\n", __func__, alloc_size, PAGE_SIZE);
- for (i = 0; i < io_tlb_nslabs; i++) { - io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE); - io_tlb_orig_addr[i] = INVALID_PHYS_ADDR; + for (i = 0; i < io_tlb_nslabs[SWIOTLB_LO]; i++) { + io_tlb_list[SWIOTLB_LO][i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE); + io_tlb_orig_addr[SWIOTLB_LO][i] = INVALID_PHYS_ADDR; } - io_tlb_index = 0; - no_iotlb_memory = false; + io_tlb_index[SWIOTLB_LO] = 0; + no_iotlb_memory[SWIOTLB_LO] = false;
if (verbose) swiotlb_print_info();
- swiotlb_set_max_segment(io_tlb_nslabs << IO_TLB_SHIFT); + swiotlb_set_max_segment(io_tlb_nslabs[SWIOTLB_LO] << IO_TLB_SHIFT); return 0; }
@@ -265,25 +266,25 @@ swiotlb_init(int verbose) unsigned char *vstart; unsigned long bytes;
- if (!io_tlb_nslabs) { - io_tlb_nslabs = (default_size >> IO_TLB_SHIFT); - io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE); + if (!io_tlb_nslabs[SWIOTLB_LO]) { + io_tlb_nslabs[SWIOTLB_LO] = (default_size >> IO_TLB_SHIFT); + io_tlb_nslabs[SWIOTLB_LO] = ALIGN(io_tlb_nslabs[SWIOTLB_LO], IO_TLB_SEGSIZE); }
- bytes = io_tlb_nslabs << IO_TLB_SHIFT; + bytes = io_tlb_nslabs[SWIOTLB_LO] << IO_TLB_SHIFT;
/* Get IO TLB memory from the low pages */ vstart = memblock_alloc_low(PAGE_ALIGN(bytes), PAGE_SIZE); - if (vstart && !swiotlb_init_with_tbl(vstart, io_tlb_nslabs, verbose)) + if (vstart && !swiotlb_init_with_tbl(vstart, io_tlb_nslabs[SWIOTLB_LO], verbose)) return;
- if (io_tlb_start) { - memblock_free_early(io_tlb_start, - PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT)); - io_tlb_start = 0; + if (io_tlb_start[SWIOTLB_LO]) { + memblock_free_early(io_tlb_start[SWIOTLB_LO], + PAGE_ALIGN(io_tlb_nslabs[SWIOTLB_LO] << IO_TLB_SHIFT)); + io_tlb_start[SWIOTLB_LO] = 0; } pr_warn("Cannot allocate buffer"); - no_iotlb_memory = true; + no_iotlb_memory[SWIOTLB_LO] = true; }
/* @@ -294,22 +295,22 @@ swiotlb_init(int verbose) int swiotlb_late_init_with_default_size(size_t default_size) { - unsigned long bytes, req_nslabs = io_tlb_nslabs; + unsigned long bytes, req_nslabs = io_tlb_nslabs[SWIOTLB_LO]; unsigned char *vstart = NULL; unsigned int order; int rc = 0;
- if (!io_tlb_nslabs) { - io_tlb_nslabs = (default_size >> IO_TLB_SHIFT); - io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE); + if (!io_tlb_nslabs[SWIOTLB_LO]) { + io_tlb_nslabs[SWIOTLB_LO] = (default_size >> IO_TLB_SHIFT); + io_tlb_nslabs[SWIOTLB_LO] = ALIGN(io_tlb_nslabs[SWIOTLB_LO], IO_TLB_SEGSIZE); }
/* * Get IO TLB memory from the low pages */ - order = get_order(io_tlb_nslabs << IO_TLB_SHIFT); - io_tlb_nslabs = SLABS_PER_PAGE << order; - bytes = io_tlb_nslabs << IO_TLB_SHIFT; + order = get_order(io_tlb_nslabs[SWIOTLB_LO] << IO_TLB_SHIFT); + io_tlb_nslabs[SWIOTLB_LO] = SLABS_PER_PAGE << order; + bytes = io_tlb_nslabs[SWIOTLB_LO] << IO_TLB_SHIFT;
while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) { vstart = (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, @@ -320,15 +321,15 @@ swiotlb_late_init_with_default_size(size_t default_size) }
if (!vstart) { - io_tlb_nslabs = req_nslabs; + io_tlb_nslabs[SWIOTLB_LO] = req_nslabs; return -ENOMEM; } if (order != get_order(bytes)) { pr_warn("only able to allocate %ld MB\n", (PAGE_SIZE << order) >> 20); - io_tlb_nslabs = SLABS_PER_PAGE << order; + io_tlb_nslabs[SWIOTLB_LO] = SLABS_PER_PAGE << order; } - rc = swiotlb_late_init_with_tbl(vstart, io_tlb_nslabs); + rc = swiotlb_late_init_with_tbl(vstart, io_tlb_nslabs[SWIOTLB_LO]); if (rc) free_pages((unsigned long)vstart, order);
@@ -337,10 +338,10 @@ swiotlb_late_init_with_default_size(size_t default_size)
static void swiotlb_cleanup(void) { - io_tlb_end = 0; - io_tlb_start = 0; - io_tlb_nslabs = 0; - max_segment = 0; + io_tlb_end[SWIOTLB_LO] = 0; + io_tlb_start[SWIOTLB_LO] = 0; + io_tlb_nslabs[SWIOTLB_LO] = 0; + max_segment[SWIOTLB_LO] = 0; }
int @@ -350,9 +351,9 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
bytes = nslabs << IO_TLB_SHIFT;
- io_tlb_nslabs = nslabs; - io_tlb_start = virt_to_phys(tlb); - io_tlb_end = io_tlb_start + bytes; + io_tlb_nslabs[SWIOTLB_LO] = nslabs; + io_tlb_start[SWIOTLB_LO] = virt_to_phys(tlb); + io_tlb_end[SWIOTLB_LO] = io_tlb_start[SWIOTLB_LO] + bytes;
set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT); memset(tlb, 0, bytes); @@ -362,37 +363,37 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) * to find contiguous free memory regions of size up to IO_TLB_SEGSIZE * between io_tlb_start and io_tlb_end. */ - io_tlb_list = (unsigned int *)__get_free_pages(GFP_KERNEL, - get_order(io_tlb_nslabs * sizeof(int))); - if (!io_tlb_list) + io_tlb_list[SWIOTLB_LO] = (unsigned int *)__get_free_pages(GFP_KERNEL, + get_order(io_tlb_nslabs[SWIOTLB_LO] * sizeof(int))); + if (!io_tlb_list[SWIOTLB_LO]) goto cleanup3;
- io_tlb_orig_addr = (phys_addr_t *) + io_tlb_orig_addr[SWIOTLB_LO] = (phys_addr_t *) __get_free_pages(GFP_KERNEL, - get_order(io_tlb_nslabs * + get_order(io_tlb_nslabs[SWIOTLB_LO] * sizeof(phys_addr_t))); - if (!io_tlb_orig_addr) + if (!io_tlb_orig_addr[SWIOTLB_LO]) goto cleanup4;
- for (i = 0; i < io_tlb_nslabs; i++) { - io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE); - io_tlb_orig_addr[i] = INVALID_PHYS_ADDR; + for (i = 0; i < io_tlb_nslabs[SWIOTLB_LO]; i++) { + io_tlb_list[SWIOTLB_LO][i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE); + io_tlb_orig_addr[SWIOTLB_LO][i] = INVALID_PHYS_ADDR; } - io_tlb_index = 0; - no_iotlb_memory = false; + io_tlb_index[SWIOTLB_LO] = 0; + no_iotlb_memory[SWIOTLB_LO] = false;
swiotlb_print_info();
late_alloc = 1;
- swiotlb_set_max_segment(io_tlb_nslabs << IO_TLB_SHIFT); + swiotlb_set_max_segment(io_tlb_nslabs[SWIOTLB_LO] << IO_TLB_SHIFT);
return 0;
cleanup4: - free_pages((unsigned long)io_tlb_list, get_order(io_tlb_nslabs * + free_pages((unsigned long)io_tlb_list[SWIOTLB_LO], get_order(io_tlb_nslabs[SWIOTLB_LO] * sizeof(int))); - io_tlb_list = NULL; + io_tlb_list[SWIOTLB_LO] = NULL; cleanup3: swiotlb_cleanup(); return -ENOMEM; @@ -400,23 +401,23 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
void __init swiotlb_exit(void) { - if (!io_tlb_orig_addr) + if (!io_tlb_orig_addr[SWIOTLB_LO]) return;
if (late_alloc) { - free_pages((unsigned long)io_tlb_orig_addr, - get_order(io_tlb_nslabs * sizeof(phys_addr_t))); - free_pages((unsigned long)io_tlb_list, get_order(io_tlb_nslabs * - sizeof(int))); - free_pages((unsigned long)phys_to_virt(io_tlb_start), - get_order(io_tlb_nslabs << IO_TLB_SHIFT)); + free_pages((unsigned long)io_tlb_orig_addr[SWIOTLB_LO], + get_order(io_tlb_nslabs[SWIOTLB_LO] * sizeof(phys_addr_t))); + free_pages((unsigned long)io_tlb_list[SWIOTLB_LO], + get_order(io_tlb_nslabs[SWIOTLB_LO] * sizeof(int))); + free_pages((unsigned long)phys_to_virt(io_tlb_start[SWIOTLB_LO]), + get_order(io_tlb_nslabs[SWIOTLB_LO] << IO_TLB_SHIFT)); } else { - memblock_free_late(__pa(io_tlb_orig_addr), - PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t))); - memblock_free_late(__pa(io_tlb_list), - PAGE_ALIGN(io_tlb_nslabs * sizeof(int))); - memblock_free_late(io_tlb_start, - PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT)); + memblock_free_late(__pa(io_tlb_orig_addr[SWIOTLB_LO]), + PAGE_ALIGN(io_tlb_nslabs[SWIOTLB_LO] * sizeof(phys_addr_t))); + memblock_free_late(__pa(io_tlb_list[SWIOTLB_LO]), + PAGE_ALIGN(io_tlb_nslabs[SWIOTLB_LO] * sizeof(int))); + memblock_free_late(io_tlb_start[SWIOTLB_LO], + PAGE_ALIGN(io_tlb_nslabs[SWIOTLB_LO] << IO_TLB_SHIFT)); } swiotlb_cleanup(); } @@ -465,7 +466,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t orig_addr, size_t mapping_size, size_t alloc_size, enum dma_data_direction dir, unsigned long attrs) { - dma_addr_t tbl_dma_addr = phys_to_dma_unencrypted(hwdev, io_tlb_start); + dma_addr_t tbl_dma_addr = phys_to_dma_unencrypted(hwdev, io_tlb_start[SWIOTLB_LO]); unsigned long flags; phys_addr_t tlb_addr; unsigned int nslots, stride, index, wrap; @@ -475,7 +476,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t orig_addr, unsigned long max_slots; unsigned long tmp_io_tlb_used;
- if (no_iotlb_memory) + if (no_iotlb_memory[SWIOTLB_LO]) panic("Can not allocate SWIOTLB buffer earlier and can't now provide you with the DMA bounce buffer");
if (mem_encrypt_active()) @@ -518,11 +519,11 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t orig_addr, */ spin_lock_irqsave(&io_tlb_lock, flags);
- if (unlikely(nslots > io_tlb_nslabs - io_tlb_used)) + if (unlikely(nslots > io_tlb_nslabs[SWIOTLB_LO] - io_tlb_used[SWIOTLB_LO])) goto not_found;
- index = ALIGN(io_tlb_index, stride); - if (index >= io_tlb_nslabs) + index = ALIGN(io_tlb_index[SWIOTLB_LO], stride); + if (index >= io_tlb_nslabs[SWIOTLB_LO]) index = 0; wrap = index;
@@ -530,7 +531,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t orig_addr, while (iommu_is_span_boundary(index, nslots, offset_slots, max_slots)) { index += stride; - if (index >= io_tlb_nslabs) + if (index >= io_tlb_nslabs[SWIOTLB_LO]) index = 0; if (index == wrap) goto not_found; @@ -541,39 +542,42 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t orig_addr, * contiguous buffers, we allocate the buffers from that slot * and mark the entries as '0' indicating unavailable. */ - if (io_tlb_list[index] >= nslots) { + if (io_tlb_list[SWIOTLB_LO][index] >= nslots) { int count = 0;
for (i = index; i < (int) (index + nslots); i++) - io_tlb_list[i] = 0; - for (i = index - 1; (OFFSET(i, IO_TLB_SEGSIZE) != IO_TLB_SEGSIZE - 1) && io_tlb_list[i]; i--) - io_tlb_list[i] = ++count; - tlb_addr = io_tlb_start + (index << IO_TLB_SHIFT); + io_tlb_list[SWIOTLB_LO][i] = 0; + for (i = index - 1; + (OFFSET(i, IO_TLB_SEGSIZE) != IO_TLB_SEGSIZE - 1) && + io_tlb_list[SWIOTLB_LO][i]; + i--) + io_tlb_list[SWIOTLB_LO][i] = ++count; + tlb_addr = io_tlb_start[SWIOTLB_LO] + (index << IO_TLB_SHIFT);
/* * Update the indices to avoid searching in the next * round. */ - io_tlb_index = ((index + nslots) < io_tlb_nslabs + io_tlb_index[SWIOTLB_LO] = ((index + nslots) < io_tlb_nslabs[SWIOTLB_LO] ? (index + nslots) : 0);
goto found; } index += stride; - if (index >= io_tlb_nslabs) + if (index >= io_tlb_nslabs[SWIOTLB_LO]) index = 0; } while (index != wrap);
not_found: - tmp_io_tlb_used = io_tlb_used; + tmp_io_tlb_used = io_tlb_used[SWIOTLB_LO];
spin_unlock_irqrestore(&io_tlb_lock, flags); if (!(attrs & DMA_ATTR_NO_WARN) && printk_ratelimit()) dev_warn(hwdev, "swiotlb buffer is full (sz: %zd bytes), total %lu (slots), used %lu (slots)\n", - alloc_size, io_tlb_nslabs, tmp_io_tlb_used); + alloc_size, io_tlb_nslabs[SWIOTLB_LO], tmp_io_tlb_used); return (phys_addr_t)DMA_MAPPING_ERROR; found: - io_tlb_used += nslots; + io_tlb_used[SWIOTLB_LO] += nslots; spin_unlock_irqrestore(&io_tlb_lock, flags);
/* @@ -582,7 +586,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t orig_addr, * needed. */ for (i = 0; i < nslots; i++) - io_tlb_orig_addr[index+i] = orig_addr + (i << IO_TLB_SHIFT); + io_tlb_orig_addr[SWIOTLB_LO][index+i] = orig_addr + (i << IO_TLB_SHIFT); if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) && (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)) swiotlb_bounce(orig_addr, tlb_addr, mapping_size, DMA_TO_DEVICE); @@ -599,8 +603,8 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr, { unsigned long flags; int i, count, nslots = ALIGN(alloc_size, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT; - int index = (tlb_addr - io_tlb_start) >> IO_TLB_SHIFT; - phys_addr_t orig_addr = io_tlb_orig_addr[index]; + int index = (tlb_addr - io_tlb_start[SWIOTLB_LO]) >> IO_TLB_SHIFT; + phys_addr_t orig_addr = io_tlb_orig_addr[SWIOTLB_LO][index];
/* * First, sync the memory before unmapping the entry @@ -619,23 +623,26 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr, spin_lock_irqsave(&io_tlb_lock, flags); { count = ((index + nslots) < ALIGN(index + 1, IO_TLB_SEGSIZE) ? - io_tlb_list[index + nslots] : 0); + io_tlb_list[SWIOTLB_LO][index + nslots] : 0); /* * Step 1: return the slots to the free list, merging the * slots with superceeding slots */ for (i = index + nslots - 1; i >= index; i--) { - io_tlb_list[i] = ++count; - io_tlb_orig_addr[i] = INVALID_PHYS_ADDR; + io_tlb_list[SWIOTLB_LO][i] = ++count; + io_tlb_orig_addr[SWIOTLB_LO][i] = INVALID_PHYS_ADDR; } /* * Step 2: merge the returned slots with the preceding slots, * if available (non zero) */ - for (i = index - 1; (OFFSET(i, IO_TLB_SEGSIZE) != IO_TLB_SEGSIZE -1) && io_tlb_list[i]; i--) - io_tlb_list[i] = ++count; + for (i = index - 1; + (OFFSET(i, IO_TLB_SEGSIZE) != IO_TLB_SEGSIZE - 1) && + io_tlb_list[SWIOTLB_LO][i]; + i--) + io_tlb_list[SWIOTLB_LO][i] = ++count;
- io_tlb_used -= nslots; + io_tlb_used[SWIOTLB_LO] -= nslots; } spin_unlock_irqrestore(&io_tlb_lock, flags); } @@ -644,8 +651,8 @@ void swiotlb_tbl_sync_single(struct device *hwdev, phys_addr_t tlb_addr, size_t size, enum dma_data_direction dir, enum dma_sync_target target) { - int index = (tlb_addr - io_tlb_start) >> IO_TLB_SHIFT; - phys_addr_t orig_addr = io_tlb_orig_addr[index]; + int index = (tlb_addr - io_tlb_start[SWIOTLB_LO]) >> IO_TLB_SHIFT; + phys_addr_t orig_addr = io_tlb_orig_addr[SWIOTLB_LO][index];
if (orig_addr == INVALID_PHYS_ADDR) return; @@ -716,7 +723,7 @@ bool is_swiotlb_active(void) * When SWIOTLB is initialized, even if io_tlb_start points to physical * address zero, io_tlb_end surely doesn't. */ - return io_tlb_end != 0; + return io_tlb_end[SWIOTLB_LO] != 0; }
#ifdef CONFIG_DEBUG_FS @@ -726,8 +733,8 @@ static int __init swiotlb_create_debugfs(void) struct dentry *root;
root = debugfs_create_dir("swiotlb", NULL); - debugfs_create_ulong("io_tlb_nslabs", 0400, root, &io_tlb_nslabs); - debugfs_create_ulong("io_tlb_used", 0400, root, &io_tlb_used); + debugfs_create_ulong("io_tlb_nslabs", 0400, root, &io_tlb_nslabs[SWIOTLB_LO]); + debugfs_create_ulong("io_tlb_used", 0400, root, &io_tlb_used[SWIOTLB_LO]); return 0; }