forked from Minki/linux
swiotlb: dynamically allocate io_tlb_default_mem
Instead of allocating ->list and ->orig_addr separately just do one dynamic allocation for the actual io_tlb_mem structure. This simplifies a lot of the initialization code, and also allows to just check io_tlb_default_mem to see if swiotlb is in use. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Christoph Hellwig
Konrad Rzeszutek Wilk
parent
73f620951b
commit
2d29960af0
@ -158,17 +158,14 @@ static const char *xen_swiotlb_error(enum xen_swiotlb_err err)
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int __ref xen_swiotlb_init(void)
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{
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enum xen_swiotlb_err m_ret = XEN_SWIOTLB_UNKNOWN;
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unsigned long nslabs, bytes, order;
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unsigned int repeat = 3;
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unsigned long bytes = swiotlb_size_or_default();
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unsigned long nslabs = bytes >> IO_TLB_SHIFT;
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unsigned int order, repeat = 3;
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int rc = -ENOMEM;
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char *start;
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nslabs = swiotlb_nr_tbl();
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if (!nslabs)
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nslabs = DEFAULT_NSLABS;
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retry:
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m_ret = XEN_SWIOTLB_ENOMEM;
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bytes = nslabs << IO_TLB_SHIFT;
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order = get_order(bytes);
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/*
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@ -221,19 +218,16 @@ error:
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#ifdef CONFIG_X86
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void __init xen_swiotlb_init_early(void)
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{
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unsigned long nslabs, bytes;
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unsigned long bytes = swiotlb_size_or_default();
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unsigned long nslabs = bytes >> IO_TLB_SHIFT;
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unsigned int repeat = 3;
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char *start;
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int rc;
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nslabs = swiotlb_nr_tbl();
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if (!nslabs)
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nslabs = DEFAULT_NSLABS;
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retry:
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/*
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* Get IO TLB memory from any location.
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*/
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bytes = nslabs << IO_TLB_SHIFT;
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start = memblock_alloc(PAGE_ALIGN(bytes), PAGE_SIZE);
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if (!start)
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panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
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@ -248,8 +242,8 @@ retry:
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if (repeat--) {
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/* Min is 2MB */
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nslabs = max(1024UL, (nslabs >> 1));
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pr_info("Lowering to %luMB\n",
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(nslabs << IO_TLB_SHIFT) >> 20);
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bytes = nslabs << IO_TLB_SHIFT;
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pr_info("Lowering to %luMB\n", bytes >> 20);
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goto retry;
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}
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panic("%s (rc:%d)", xen_swiotlb_error(XEN_SWIOTLB_EFIXUP), rc);
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@ -548,7 +542,7 @@ xen_swiotlb_sync_sg_for_device(struct device *dev, struct scatterlist *sgl,
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static int
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xen_swiotlb_dma_supported(struct device *hwdev, u64 mask)
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{
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return xen_phys_to_dma(hwdev, io_tlb_default_mem.end - 1) <= mask;
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return xen_phys_to_dma(hwdev, io_tlb_default_mem->end - 1) <= mask;
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}
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const struct dma_map_ops xen_swiotlb_dma_ops = {
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@ -90,28 +90,30 @@ struct io_tlb_mem {
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phys_addr_t end;
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unsigned long nslabs;
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unsigned long used;
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unsigned int *list;
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unsigned int index;
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phys_addr_t *orig_addr;
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size_t *alloc_size;
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spinlock_t lock;
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struct dentry *debugfs;
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bool late_alloc;
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struct io_tlb_slot {
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phys_addr_t orig_addr;
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size_t alloc_size;
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unsigned int list;
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} slots[];
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};
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extern struct io_tlb_mem io_tlb_default_mem;
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extern struct io_tlb_mem *io_tlb_default_mem;
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static inline bool is_swiotlb_buffer(phys_addr_t paddr)
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{
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struct io_tlb_mem *mem = &io_tlb_default_mem;
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struct io_tlb_mem *mem = io_tlb_default_mem;
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return paddr >= mem->start && paddr < mem->end;
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return mem && paddr >= mem->start && paddr < mem->end;
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}
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void __init swiotlb_exit(void);
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unsigned int swiotlb_max_segment(void);
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size_t swiotlb_max_mapping_size(struct device *dev);
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bool is_swiotlb_active(void);
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void __init swiotlb_adjust_size(unsigned long new_size);
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void __init swiotlb_adjust_size(unsigned long size);
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#else
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#define swiotlb_force SWIOTLB_NO_FORCE
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static inline bool is_swiotlb_buffer(phys_addr_t paddr)
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@ -135,7 +137,7 @@ static inline bool is_swiotlb_active(void)
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return false;
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}
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static inline void swiotlb_adjust_size(unsigned long new_size)
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static inline void swiotlb_adjust_size(unsigned long size)
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{
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}
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#endif /* CONFIG_SWIOTLB */
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@ -63,7 +63,7 @@
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enum swiotlb_force swiotlb_force;
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struct io_tlb_mem io_tlb_default_mem;
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struct io_tlb_mem *io_tlb_default_mem;
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/*
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* Max segment that we can provide which (if pages are contingous) will
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@ -71,15 +71,15 @@ struct io_tlb_mem io_tlb_default_mem;
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*/
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static unsigned int max_segment;
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static unsigned long default_nslabs = IO_TLB_DEFAULT_SIZE >> IO_TLB_SHIFT;
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static int __init
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setup_io_tlb_npages(char *str)
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{
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struct io_tlb_mem *mem = &io_tlb_default_mem;
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if (isdigit(*str)) {
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mem->nslabs = simple_strtoul(str, &str, 0);
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/* avoid tail segment of size < IO_TLB_SEGSIZE */
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mem->nslabs = ALIGN(mem->nslabs, IO_TLB_SEGSIZE);
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default_nslabs =
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ALIGN(simple_strtoul(str, &str, 0), IO_TLB_SEGSIZE);
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}
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if (*str == ',')
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++str;
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@ -87,24 +87,22 @@ setup_io_tlb_npages(char *str)
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swiotlb_force = SWIOTLB_FORCE;
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} else if (!strcmp(str, "noforce")) {
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swiotlb_force = SWIOTLB_NO_FORCE;
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mem->nslabs = 1;
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default_nslabs = 1;
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}
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return 0;
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}
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early_param("swiotlb", setup_io_tlb_npages);
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static bool no_iotlb_memory;
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unsigned long swiotlb_nr_tbl(void)
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{
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return unlikely(no_iotlb_memory) ? 0 : io_tlb_default_mem.nslabs;
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return io_tlb_default_mem ? io_tlb_default_mem->nslabs : 0;
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}
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EXPORT_SYMBOL_GPL(swiotlb_nr_tbl);
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unsigned int swiotlb_max_segment(void)
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{
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return unlikely(no_iotlb_memory) ? 0 : max_segment;
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return io_tlb_default_mem ? max_segment : 0;
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}
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EXPORT_SYMBOL_GPL(swiotlb_max_segment);
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@ -118,44 +116,32 @@ void swiotlb_set_max_segment(unsigned int val)
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unsigned long swiotlb_size_or_default(void)
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{
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unsigned long size;
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size = io_tlb_default_mem.nslabs << IO_TLB_SHIFT;
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return size ? size : (IO_TLB_DEFAULT_SIZE);
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return default_nslabs << IO_TLB_SHIFT;
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}
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void __init swiotlb_adjust_size(unsigned long new_size)
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void __init swiotlb_adjust_size(unsigned long size)
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{
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struct io_tlb_mem *mem = &io_tlb_default_mem;
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unsigned long size;
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/*
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* If swiotlb parameter has not been specified, give a chance to
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* architectures such as those supporting memory encryption to
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* adjust/expand SWIOTLB size for their use.
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*/
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if (!mem->nslabs) {
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size = ALIGN(new_size, IO_TLB_SIZE);
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mem->nslabs = size >> IO_TLB_SHIFT;
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mem->nslabs = ALIGN(mem->nslabs, IO_TLB_SEGSIZE);
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pr_info("SWIOTLB bounce buffer size adjusted to %luMB", size >> 20);
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}
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size = ALIGN(size, IO_TLB_SIZE);
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default_nslabs = ALIGN(size >> IO_TLB_SHIFT, IO_TLB_SEGSIZE);
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pr_info("SWIOTLB bounce buffer size adjusted to %luMB", size >> 20);
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}
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void swiotlb_print_info(void)
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{
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struct io_tlb_mem *mem = &io_tlb_default_mem;
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unsigned long bytes = mem->nslabs << IO_TLB_SHIFT;
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struct io_tlb_mem *mem = io_tlb_default_mem;
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if (no_iotlb_memory) {
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if (!mem) {
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pr_warn("No low mem\n");
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return;
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}
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pr_info("mapped [mem %pa-%pa] (%luMB)\n", &mem->start, &mem->end,
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bytes >> 20);
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(mem->nslabs << IO_TLB_SHIFT) >> 20);
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}
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static inline unsigned long io_tlb_offset(unsigned long val)
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@ -176,13 +162,12 @@ static inline unsigned long nr_slots(u64 val)
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*/
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void __init swiotlb_update_mem_attributes(void)
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{
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struct io_tlb_mem *mem = &io_tlb_default_mem;
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struct io_tlb_mem *mem = io_tlb_default_mem;
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void *vaddr;
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unsigned long bytes;
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if (no_iotlb_memory || mem->late_alloc)
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if (!mem || mem->late_alloc)
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return;
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vaddr = phys_to_virt(mem->start);
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bytes = PAGE_ALIGN(mem->nslabs << IO_TLB_SHIFT);
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set_memory_decrypted((unsigned long)vaddr, bytes >> PAGE_SHIFT);
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@ -191,55 +176,33 @@ void __init swiotlb_update_mem_attributes(void)
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int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
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{
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struct io_tlb_mem *mem = &io_tlb_default_mem;
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unsigned long i, bytes;
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unsigned long bytes = nslabs << IO_TLB_SHIFT, i;
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struct io_tlb_mem *mem;
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size_t alloc_size;
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/* protect against double initialization */
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if (WARN_ON_ONCE(mem->start))
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if (WARN_ON_ONCE(io_tlb_default_mem))
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return -ENOMEM;
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bytes = nslabs << IO_TLB_SHIFT;
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alloc_size = PAGE_ALIGN(struct_size(mem, slots, nslabs));
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mem = memblock_alloc(alloc_size, PAGE_SIZE);
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if (!mem)
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panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
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__func__, alloc_size, PAGE_SIZE);
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mem->nslabs = nslabs;
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mem->start = __pa(tlb);
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mem->end = mem->start + bytes;
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mem->index = 0;
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spin_lock_init(&mem->lock);
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/*
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* Allocate and initialize the free list array. This array is used
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* to find contiguous free memory regions of size up to IO_TLB_SEGSIZE
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* between mem->start and mem->end.
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*/
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alloc_size = PAGE_ALIGN(mem->nslabs * sizeof(int));
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mem->list = memblock_alloc(alloc_size, PAGE_SIZE);
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if (!mem->list)
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panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
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__func__, alloc_size, PAGE_SIZE);
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alloc_size = PAGE_ALIGN(mem->nslabs * sizeof(phys_addr_t));
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mem->orig_addr = memblock_alloc(alloc_size, PAGE_SIZE);
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if (!mem->orig_addr)
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panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
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__func__, alloc_size, PAGE_SIZE);
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alloc_size = PAGE_ALIGN(mem->nslabs * sizeof(size_t));
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mem->alloc_size = memblock_alloc(alloc_size, PAGE_SIZE);
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if (mem->alloc_size)
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panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
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__func__, alloc_size, PAGE_SIZE);
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for (i = 0; i < mem->nslabs; i++) {
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mem->list[i] = IO_TLB_SEGSIZE - io_tlb_offset(i);
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mem->orig_addr[i] = INVALID_PHYS_ADDR;
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mem->alloc_size[i] = 0;
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mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
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mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
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mem->slots[i].alloc_size = 0;
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}
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no_iotlb_memory = false;
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io_tlb_default_mem = mem;
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if (verbose)
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swiotlb_print_info();
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swiotlb_set_max_segment(mem->nslabs << IO_TLB_SHIFT);
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return 0;
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}
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@ -251,30 +214,21 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
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void __init
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swiotlb_init(int verbose)
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{
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struct io_tlb_mem *mem = &io_tlb_default_mem;
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size_t default_size = IO_TLB_DEFAULT_SIZE;
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unsigned char *vstart;
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unsigned long bytes;
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if (!mem->nslabs) {
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mem->nslabs = (default_size >> IO_TLB_SHIFT);
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mem->nslabs = ALIGN(mem->nslabs, IO_TLB_SEGSIZE);
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}
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bytes = mem->nslabs << IO_TLB_SHIFT;
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size_t bytes = PAGE_ALIGN(default_nslabs << IO_TLB_SHIFT);
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void *tlb;
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/* Get IO TLB memory from the low pages */
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vstart = memblock_alloc_low(PAGE_ALIGN(bytes), PAGE_SIZE);
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if (vstart && !swiotlb_init_with_tbl(vstart, mem->nslabs, verbose))
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return;
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tlb = memblock_alloc_low(bytes, PAGE_SIZE);
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if (!tlb)
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goto fail;
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if (swiotlb_init_with_tbl(tlb, default_nslabs, verbose))
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goto fail_free_mem;
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return;
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if (mem->start) {
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memblock_free_early(mem->start,
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PAGE_ALIGN(mem->nslabs << IO_TLB_SHIFT));
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mem->start = 0;
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}
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fail_free_mem:
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memblock_free_early(__pa(tlb), bytes);
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fail:
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pr_warn("Cannot allocate buffer");
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no_iotlb_memory = true;
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}
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/*
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@ -285,23 +239,19 @@ swiotlb_init(int verbose)
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int
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swiotlb_late_init_with_default_size(size_t default_size)
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{
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struct io_tlb_mem *mem = &io_tlb_default_mem;
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unsigned long bytes, req_nslabs = mem->nslabs;
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unsigned long nslabs =
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ALIGN(default_size >> IO_TLB_SHIFT, IO_TLB_SEGSIZE);
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unsigned long bytes;
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unsigned char *vstart = NULL;
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unsigned int order;
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int rc = 0;
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if (!mem->nslabs) {
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mem->nslabs = (default_size >> IO_TLB_SHIFT);
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mem->nslabs = ALIGN(mem->nslabs, IO_TLB_SEGSIZE);
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}
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/*
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* Get IO TLB memory from the low pages
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*/
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order = get_order(mem->nslabs << IO_TLB_SHIFT);
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mem->nslabs = SLABS_PER_PAGE << order;
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bytes = mem->nslabs << IO_TLB_SHIFT;
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order = get_order(nslabs << IO_TLB_SHIFT);
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nslabs = SLABS_PER_PAGE << order;
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bytes = nslabs << IO_TLB_SHIFT;
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while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) {
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vstart = (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN,
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@ -311,43 +261,35 @@ swiotlb_late_init_with_default_size(size_t default_size)
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order--;
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}
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if (!vstart) {
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mem->nslabs = req_nslabs;
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if (!vstart)
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return -ENOMEM;
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}
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if (order != get_order(bytes)) {
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pr_warn("only able to allocate %ld MB\n",
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(PAGE_SIZE << order) >> 20);
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mem->nslabs = SLABS_PER_PAGE << order;
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nslabs = SLABS_PER_PAGE << order;
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}
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rc = swiotlb_late_init_with_tbl(vstart, mem->nslabs);
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rc = swiotlb_late_init_with_tbl(vstart, nslabs);
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if (rc)
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free_pages((unsigned long)vstart, order);
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return rc;
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}
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static void swiotlb_cleanup(void)
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{
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struct io_tlb_mem *mem = &io_tlb_default_mem;
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mem->end = 0;
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mem->start = 0;
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mem->nslabs = 0;
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max_segment = 0;
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}
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int
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swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
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{
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struct io_tlb_mem *mem = &io_tlb_default_mem;
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unsigned long i, bytes;
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unsigned long bytes = nslabs << IO_TLB_SHIFT, i;
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struct io_tlb_mem *mem;
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/* protect against double initialization */
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if (WARN_ON_ONCE(mem->start))
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if (WARN_ON_ONCE(io_tlb_default_mem))
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return -ENOMEM;
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bytes = nslabs << IO_TLB_SHIFT;
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mem = (void *)__get_free_pages(GFP_KERNEL,
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get_order(struct_size(mem, slots, nslabs)));
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if (!mem)
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return -ENOMEM;
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mem->nslabs = nslabs;
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mem->start = virt_to_phys(tlb);
|
||||
@ -355,84 +297,35 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
|
||||
mem->index = 0;
|
||||
mem->late_alloc = 1;
|
||||
spin_lock_init(&mem->lock);
|
||||
for (i = 0; i < mem->nslabs; i++) {
|
||||
mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
|
||||
mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
|
||||
mem->slots[i].alloc_size = 0;
|
||||
}
|
||||
|
||||
set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT);
|
||||
memset(tlb, 0, 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 mem->start and mem->end.
|
||||
*/
|
||||
mem->list = (unsigned int *)__get_free_pages(GFP_KERNEL,
|
||||
get_order(mem->nslabs * sizeof(int)));
|
||||
if (!mem->list)
|
||||
goto cleanup3;
|
||||
|
||||
mem->orig_addr = (phys_addr_t *)
|
||||
__get_free_pages(GFP_KERNEL,
|
||||
get_order(mem->nslabs *
|
||||
sizeof(phys_addr_t)));
|
||||
if (!mem->orig_addr)
|
||||
goto cleanup4;
|
||||
|
||||
mem->alloc_size = (size_t *)
|
||||
__get_free_pages(GFP_KERNEL,
|
||||
get_order(mem->nslabs *
|
||||
sizeof(size_t)));
|
||||
if (!mem->alloc_size)
|
||||
goto cleanup5;
|
||||
|
||||
for (i = 0; i < mem->nslabs; i++) {
|
||||
mem->list[i] = IO_TLB_SEGSIZE - io_tlb_offset(i);
|
||||
mem->orig_addr[i] = INVALID_PHYS_ADDR;
|
||||
mem->alloc_size[i] = 0;
|
||||
}
|
||||
no_iotlb_memory = false;
|
||||
|
||||
io_tlb_default_mem = mem;
|
||||
swiotlb_print_info();
|
||||
swiotlb_set_max_segment(mem->nslabs << IO_TLB_SHIFT);
|
||||
return 0;
|
||||
|
||||
cleanup5:
|
||||
free_pages((unsigned long)mem->orig_addr,
|
||||
get_order(mem->nslabs * sizeof(phys_addr_t)));
|
||||
cleanup4:
|
||||
free_pages((unsigned long)mem->list,
|
||||
get_order(mem->nslabs * sizeof(int)));
|
||||
mem->list = NULL;
|
||||
cleanup3:
|
||||
swiotlb_cleanup();
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
void __init swiotlb_exit(void)
|
||||
{
|
||||
struct io_tlb_mem *mem = &io_tlb_default_mem;
|
||||
struct io_tlb_mem *mem = io_tlb_default_mem;
|
||||
size_t size;
|
||||
|
||||
if (!mem->orig_addr)
|
||||
if (!mem)
|
||||
return;
|
||||
|
||||
if (mem->late_alloc) {
|
||||
free_pages((unsigned long)mem->alloc_size,
|
||||
get_order(mem->nslabs * sizeof(size_t)));
|
||||
free_pages((unsigned long)mem->orig_addr,
|
||||
get_order(mem->nslabs * sizeof(phys_addr_t)));
|
||||
free_pages((unsigned long)mem->list,
|
||||
get_order(mem->nslabs * sizeof(int)));
|
||||
free_pages((unsigned long)phys_to_virt(mem->start),
|
||||
get_order(mem->nslabs << IO_TLB_SHIFT));
|
||||
} else {
|
||||
memblock_free_late(__pa(mem->alloc_size),
|
||||
PAGE_ALIGN(mem->nslabs * sizeof(size_t)));
|
||||
memblock_free_late(__pa(mem->orig_addr),
|
||||
PAGE_ALIGN(mem->nslabs * sizeof(phys_addr_t)));
|
||||
memblock_free_late(__pa(mem->list),
|
||||
PAGE_ALIGN(mem->nslabs * sizeof(int)));
|
||||
memblock_free_late(mem->start,
|
||||
PAGE_ALIGN(mem->nslabs << IO_TLB_SHIFT));
|
||||
}
|
||||
swiotlb_cleanup();
|
||||
size = struct_size(mem, slots, mem->nslabs);
|
||||
if (mem->late_alloc)
|
||||
free_pages((unsigned long)mem, get_order(size));
|
||||
else
|
||||
memblock_free_late(__pa(mem), PAGE_ALIGN(size));
|
||||
io_tlb_default_mem = NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
@ -441,10 +334,10 @@ void __init swiotlb_exit(void)
|
||||
static void swiotlb_bounce(struct device *dev, phys_addr_t tlb_addr, size_t size,
|
||||
enum dma_data_direction dir)
|
||||
{
|
||||
struct io_tlb_mem *mem = &io_tlb_default_mem;
|
||||
struct io_tlb_mem *mem = io_tlb_default_mem;
|
||||
int index = (tlb_addr - mem->start) >> IO_TLB_SHIFT;
|
||||
phys_addr_t orig_addr = mem->orig_addr[index];
|
||||
size_t alloc_size = mem->alloc_size[index];
|
||||
phys_addr_t orig_addr = mem->slots[index].orig_addr;
|
||||
size_t alloc_size = mem->slots[index].alloc_size;
|
||||
unsigned long pfn = PFN_DOWN(orig_addr);
|
||||
unsigned char *vaddr = phys_to_virt(tlb_addr);
|
||||
|
||||
@ -523,7 +416,7 @@ static unsigned int wrap_index(struct io_tlb_mem *mem, unsigned int index)
|
||||
static int find_slots(struct device *dev, phys_addr_t orig_addr,
|
||||
size_t alloc_size)
|
||||
{
|
||||
struct io_tlb_mem *mem = &io_tlb_default_mem;
|
||||
struct io_tlb_mem *mem = io_tlb_default_mem;
|
||||
unsigned long boundary_mask = dma_get_seg_boundary(dev);
|
||||
dma_addr_t tbl_dma_addr =
|
||||
phys_to_dma_unencrypted(dev, mem->start) & boundary_mask;
|
||||
@ -565,7 +458,7 @@ static int find_slots(struct device *dev, phys_addr_t orig_addr,
|
||||
if (!iommu_is_span_boundary(index, nslots,
|
||||
nr_slots(tbl_dma_addr),
|
||||
max_slots)) {
|
||||
if (mem->list[index] >= nslots)
|
||||
if (mem->slots[index].list >= nslots)
|
||||
goto found;
|
||||
}
|
||||
index = wrap_index(mem, index + stride);
|
||||
@ -577,11 +470,11 @@ not_found:
|
||||
|
||||
found:
|
||||
for (i = index; i < index + nslots; i++)
|
||||
mem->list[i] = 0;
|
||||
mem->slots[i].list = 0;
|
||||
for (i = index - 1;
|
||||
io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 &&
|
||||
mem->list[i]; i--)
|
||||
mem->list[i] = ++count;
|
||||
mem->slots[i].list; i--)
|
||||
mem->slots[i].list = ++count;
|
||||
|
||||
/*
|
||||
* Update the indices to avoid searching in the next round.
|
||||
@ -600,12 +493,12 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
|
||||
size_t mapping_size, size_t alloc_size,
|
||||
enum dma_data_direction dir, unsigned long attrs)
|
||||
{
|
||||
struct io_tlb_mem *mem = &io_tlb_default_mem;
|
||||
struct io_tlb_mem *mem = io_tlb_default_mem;
|
||||
unsigned int offset = swiotlb_align_offset(dev, orig_addr);
|
||||
unsigned int index, i;
|
||||
phys_addr_t tlb_addr;
|
||||
|
||||
if (no_iotlb_memory)
|
||||
if (!mem)
|
||||
panic("Can not allocate SWIOTLB buffer earlier and can't now provide you with the DMA bounce buffer");
|
||||
|
||||
if (mem_encrypt_active())
|
||||
@ -632,8 +525,9 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
|
||||
* needed.
|
||||
*/
|
||||
for (i = 0; i < nr_slots(alloc_size + offset); i++) {
|
||||
mem->orig_addr[index + i] = slot_addr(orig_addr, i);
|
||||
mem->alloc_size[index + i] = alloc_size - (i << IO_TLB_SHIFT);
|
||||
mem->slots[index + i].orig_addr = slot_addr(orig_addr, i);
|
||||
mem->slots[index + i].alloc_size =
|
||||
alloc_size - (i << IO_TLB_SHIFT);
|
||||
}
|
||||
tlb_addr = slot_addr(mem->start, index) + offset;
|
||||
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
|
||||
@ -649,11 +543,11 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
|
||||
size_t mapping_size, enum dma_data_direction dir,
|
||||
unsigned long attrs)
|
||||
{
|
||||
struct io_tlb_mem *mem = &io_tlb_default_mem;
|
||||
struct io_tlb_mem *mem = io_tlb_default_mem;
|
||||
unsigned long flags;
|
||||
unsigned int offset = swiotlb_align_offset(hwdev, tlb_addr);
|
||||
int index = (tlb_addr - offset - mem->start) >> IO_TLB_SHIFT;
|
||||
int nslots = nr_slots(mem->alloc_size[index] + offset);
|
||||
int nslots = nr_slots(mem->slots[index].alloc_size + offset);
|
||||
int count, i;
|
||||
|
||||
/*
|
||||
@ -671,7 +565,7 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
|
||||
*/
|
||||
spin_lock_irqsave(&mem->lock, flags);
|
||||
if (index + nslots < ALIGN(index + 1, IO_TLB_SEGSIZE))
|
||||
count = mem->list[index + nslots];
|
||||
count = mem->slots[index + nslots].list;
|
||||
else
|
||||
count = 0;
|
||||
|
||||
@ -680,9 +574,9 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
|
||||
* superceeding slots
|
||||
*/
|
||||
for (i = index + nslots - 1; i >= index; i--) {
|
||||
mem->list[i] = ++count;
|
||||
mem->orig_addr[i] = INVALID_PHYS_ADDR;
|
||||
mem->alloc_size[i] = 0;
|
||||
mem->slots[i].list = ++count;
|
||||
mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
|
||||
mem->slots[i].alloc_size = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
@ -690,9 +584,9 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
|
||||
* available (non zero)
|
||||
*/
|
||||
for (i = index - 1;
|
||||
io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 && mem->list[i];
|
||||
io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 && mem->slots[i].list;
|
||||
i--)
|
||||
mem->list[i] = ++count;
|
||||
mem->slots[i].list = ++count;
|
||||
mem->used -= nslots;
|
||||
spin_unlock_irqrestore(&mem->lock, flags);
|
||||
}
|
||||
@ -756,19 +650,17 @@ size_t swiotlb_max_mapping_size(struct device *dev)
|
||||
|
||||
bool is_swiotlb_active(void)
|
||||
{
|
||||
/*
|
||||
* When SWIOTLB is initialized, even if mem->start points to physical
|
||||
* address zero, mem->end surely doesn't.
|
||||
*/
|
||||
return io_tlb_default_mem.end != 0;
|
||||
return io_tlb_default_mem != NULL;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_DEBUG_FS
|
||||
|
||||
static int __init swiotlb_create_debugfs(void)
|
||||
{
|
||||
struct io_tlb_mem *mem = &io_tlb_default_mem;
|
||||
struct io_tlb_mem *mem = io_tlb_default_mem;
|
||||
|
||||
if (!mem)
|
||||
return 0;
|
||||
mem->debugfs = debugfs_create_dir("swiotlb", NULL);
|
||||
debugfs_create_ulong("io_tlb_nslabs", 0400, mem->debugfs, &mem->nslabs);
|
||||
debugfs_create_ulong("io_tlb_used", 0400, mem->debugfs, &mem->used);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user