static int __devinit profile_cpu_callback(struct notifier_block *info,
unsigned long action, void *__cpu)
{
int node, cpu = (unsigned long)__cpu;
struct page *page;
switch (action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
node = cpu_to_node(cpu);
per_cpu(cpu_profile_flip, cpu) = 0;
if (!per_cpu(cpu_profile_hits, cpu)[1]) {
page = alloc_pages_node(node,
GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
0);
if (!page)
return NOTIFY_BAD;
per_cpu(cpu_profile_hits, cpu)[1] = page_address(page);
}
if (!per_cpu(cpu_profile_hits, cpu)[0]) {
page = alloc_pages_node(node,
GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
0);
if (!page)
goto out_free;
per_cpu(cpu_profile_hits, cpu)[0] = page_address(page);
}
break;
out_free:
page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[1]);
per_cpu(cpu_profile_hits, cpu)[1] = NULL;
__free_page(page);
return NOTIFY_BAD;
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
cpu_set(cpu, prof_cpu_mask);
break;
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
case CPU_DEAD:
case CPU_DEAD_FROZEN:
cpu_clear(cpu, prof_cpu_mask);
if (per_cpu(cpu_profile_hits, cpu)[0]) {
page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[0]);
per_cpu(cpu_profile_hits, cpu)[0] = NULL;
__free_page(page);
}
if (per_cpu(cpu_profile_hits, cpu)[1]) {
page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[1]);
per_cpu(cpu_profile_hits, cpu)[1] = NULL;
__free_page(page);
}
break;
}
return NOTIFY_OK;
}
static int setup_intr_remapping(struct intel_iommu *iommu, int mode)
{
struct ir_table *ir_table;
struct page *pages;
ir_table = iommu->ir_table = kzalloc(sizeof(struct ir_table),
GFP_ATOMIC);
if (!iommu->ir_table)
return -ENOMEM;
pages = alloc_pages_node(iommu->node, GFP_ATOMIC | __GFP_ZERO,
INTR_REMAP_PAGE_ORDER);
if (!pages) {
printk(KERN_ERR "failed to allocate pages of order %d\n",
INTR_REMAP_PAGE_ORDER);
kfree(iommu->ir_table);
return -ENOMEM;
}
ir_table->base = page_address(pages);
iommu_set_intr_remapping(iommu, mode);
return 0;
}
/**
* pcpu_alloc_pages - allocates pages for @chunk
* @chunk: target chunk
* @pages: array to put the allocated pages into, indexed by pcpu_page_idx()
* @populated: populated bitmap
* @page_start: page index of the first page to be allocated
* @page_end: page index of the last page to be allocated + 1
*
* Allocate pages [@page_start,@page_end) into @pages for all units.
* The allocation is for @chunk. Percpu core doesn't care about the
* content of @pages and will pass it verbatim to pcpu_map_pages().
*/
static int pcpu_alloc_pages(struct pcpu_chunk *chunk,
struct page **pages, unsigned long *populated,
int page_start, int page_end)
{
const gfp_t gfp = GFP_KERNEL | __GFP_HIGHMEM | __GFP_COLD;
unsigned int cpu;
int nid;
int i;
for_each_possible_cpu(cpu) {
for (i = page_start; i < page_end; i++) {
struct page **pagep = &pages[pcpu_page_idx(cpu, i)];
//*pagep = alloc_pages_node(cpu_to_node(cpu), gfp, 0);
nid = cpu_to_node(cpu);
if((nid == -1) || !(node_zonelist(nid, GFP_KERNEL)->_zonerefs->zone))
nid = numa_node_id();
*pagep = alloc_pages_node(nid, gfp, 0);
if (!*pagep) {
pcpu_free_pages(chunk, pages, populated,
page_start, page_end);
return -ENOMEM;
}
}
}
return 0;
}
/*
* Allocate an RPC server's buffer space.
* We allocate pages and place them in rq_argpages.
*/
static int
svc_init_buffer(struct svc_rqst *rqstp, unsigned int size, int node)
{
unsigned int pages, arghi;
/* bc_xprt uses fore channel allocated buffers */
if (svc_is_backchannel(rqstp))
return 1;
pages = size / PAGE_SIZE + 1; /* extra page as we hold both request and reply.
* We assume one is at most one page
*/
arghi = 0;
WARN_ON_ONCE(pages > RPCSVC_MAXPAGES);
if (pages > RPCSVC_MAXPAGES)
pages = RPCSVC_MAXPAGES;
while (pages) {
struct page *p = alloc_pages_node(node, GFP_KERNEL, 0);
if (!p)
break;
rqstp->rq_pages[arghi++] = p;
pages--;
}
return pages == 0;
}
void kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node)
{
struct page *shadow;
int pages;
int i;
pages = 1 << order;
/*
* With kmemcheck enabled, we need to allocate a memory area for the
* shadow bits as well.
*/
shadow = alloc_pages_node(node, flags | __GFP_NOTRACK, order);
if (!shadow) {
if (printk_ratelimit())
printk(KERN_ERR "kmemcheck: failed to allocate "
"shadow bitmap\n");
return;
}
for(i = 0; i < pages; ++i)
page[i].shadow = page_address(&shadow[i]);
/*
* Mark it as non-present for the MMU so that our accesses to
* this memory will trigger a page fault and let us analyze
* the memory accesses.
*/
kmemcheck_hide_pages(page, pages);
}
void *dma_generic_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t flag,
struct dma_attrs *attrs)
{
unsigned long dma_mask;
struct page *page = NULL;
unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
dma_addr_t addr;
dma_mask = dma_alloc_coherent_mask(dev, flag);
flag |= __GFP_ZERO;
again:
if (!(flag & GFP_ATOMIC))
page = dma_alloc_from_contiguous(dev, count, get_order(size));
if (!page)
page = alloc_pages_node(dev_to_node(dev), flag, get_order(size));
if (!page)
return NULL;
addr = page_to_phys(page);
if (addr + size > dma_mask) {
__free_pages(page, get_order(size));
if (dma_mask < DMA_BIT_MASK(32) && !(flag & GFP_DMA)) {
flag = (flag & ~GFP_DMA32) | GFP_DMA;
goto again;
}
return NULL;
}
*dma_addr = addr;
return page_address(page);
}
/**
* pcpu_alloc_pages - allocates pages for @chunk
* @chunk: target chunk
* @pages: array to put the allocated pages into, indexed by pcpu_page_idx()
* @page_start: page index of the first page to be allocated
* @page_end: page index of the last page to be allocated + 1
*
* Allocate pages [@page_start,@page_end) into @pages for all units.
* The allocation is for @chunk. Percpu core doesn't care about the
* content of @pages and will pass it verbatim to pcpu_map_pages().
*/
static int pcpu_alloc_pages(struct pcpu_chunk *chunk,
struct page **pages, int page_start, int page_end)
{
const gfp_t gfp = GFP_KERNEL | __GFP_HIGHMEM;
unsigned int cpu, tcpu;
int i;
for_each_possible_cpu(cpu) {
for (i = page_start; i < page_end; i++) {
struct page **pagep = &pages[pcpu_page_idx(cpu, i)];
*pagep = alloc_pages_node(cpu_to_node(cpu), gfp, 0);
if (!*pagep)
goto err;
}
}
return 0;
err:
while (--i >= page_start)
__free_page(pages[pcpu_page_idx(cpu, i)]);
for_each_possible_cpu(tcpu) {
if (tcpu == cpu)
break;
for (i = page_start; i < page_end; i++)
__free_page(pages[pcpu_page_idx(tcpu, i)]);
}
return -ENOMEM;
}
void *dma_direct_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
{
void *ret;
#ifdef CONFIG_NOT_COHERENT_CACHE
ret = __dma_alloc_coherent(dev, size, dma_handle, flag);
if (ret == NULL)
return NULL;
*dma_handle += get_dma_offset(dev);
return ret;
#else
struct page *page;
int node = dev_to_node(dev);
/* ignore region specifiers */
flag &= ~(__GFP_HIGHMEM);
page = alloc_pages_node(node, flag, get_order(size));
if (page == NULL)
return NULL;
ret = page_address(page);
memset(ret, 0, size);
*dma_handle = virt_to_abs(ret) + get_dma_offset(dev);
return ret;
#endif
}
/*! 2016-04-02 study -ing */
static int pcpu_alloc_pages(struct pcpu_chunk *chunk,
struct page **pages, unsigned long *populated,
int page_start, int page_end)
{
const gfp_t gfp = GFP_KERNEL | __GFP_HIGHMEM | __GFP_COLD;
unsigned int cpu;
int i;
for_each_possible_cpu(cpu) {
for (i = page_start; i < page_end; i++) {
/*! pages에서 pcpu page 의 index에 해당하는 위치를 찾는다.
* (pages 는 포인터 배열)
*/
struct page **pagep = &pages[pcpu_page_idx(cpu, i)];
/*! 해당 위치에 pages node alloc */
*pagep = alloc_pages_node(cpu_to_node(cpu), gfp, 0);
if (!*pagep) {
/*! alloc 실패 시 free */
pcpu_free_pages(chunk, pages, populated,
page_start, page_end);
return -ENOMEM;
}
}
}
return 0;
}
static struct thread_info *alloc_thread_info_node(struct task_struct *tsk,
int node)
{
struct page *page = alloc_pages_node(node, THREADINFO_GFP_ACCOUNTED,
THREAD_SIZE_ORDER);
return page ? page_address(page) : NULL;
}
static int __init create_hash_tables(void)
{
int cpu;
for_each_online_cpu(cpu) {
int node = cpu_to_node(cpu);
struct page *page;
page = alloc_pages_node(node,
GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
0);
if (!page)
goto out_cleanup;
per_cpu(cpu_profile_hits, cpu)[1]
= (struct profile_hit *)page_address(page);
page = alloc_pages_node(node,
GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
0);
if (!page)
goto out_cleanup;
per_cpu(cpu_profile_hits, cpu)[0]
= (struct profile_hit *)page_address(page);
}
return 0;
out_cleanup:
immediate_set_early(prof_on, 0);
smp_mb();
on_each_cpu(profile_nop, NULL, 0, 1);
for_each_online_cpu(cpu) {
struct page *page;
if (per_cpu(cpu_profile_hits, cpu)[0]) {
page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[0]);
per_cpu(cpu_profile_hits, cpu)[0] = NULL;
__free_page(page);
}
if (per_cpu(cpu_profile_hits, cpu)[1]) {
page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[1]);
per_cpu(cpu_profile_hits, cpu)[1] = NULL;
__free_page(page);
}
}
return -1;
}
struct page *homecache_alloc_pages_node(int nid, gfp_t gfp_mask,
unsigned int order, int home)
{
struct page *page;
BUG_ON(gfp_mask & __GFP_HIGHMEM); /* must be lowmem */
page = alloc_pages_node(nid, gfp_mask, order);
if (page)
homecache_change_page_home(page, order, home);
return page;
}
struct thread_info *alloc_thread_info_node(struct task_struct *tsk, int node)
{
#ifdef CONFIG_DEBUG_STACK_USAGE
gfp_t mask = GFP_KERNEL | __GFP_ZERO;
#else
gfp_t mask = GFP_KERNEL;
#endif
struct page *page = alloc_pages_node(node, mask, THREAD_SIZE_ORDER);
return page ? page_address(page) : NULL;
}
static void *perf_mmap_alloc_page(int cpu)
{
struct page *page;
int node;
node = (cpu == -1) ? cpu : cpu_to_node(cpu);
page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
if (!page)
return NULL;
return page_address(page);
}
void
sn_init_irq_desc(void) {
int i;
irq_desc_t *base_desc = _irq_desc, *p;
for (i=0; i < NR_CPUS; i++) {
p = page_address(alloc_pages_node(local_cnodeid(), GFP_KERNEL,
get_order(sizeof(struct irq_desc) * NR_IRQS) ) );
ASSERT(p);
memcpy(p, base_desc, sizeof(struct irq_desc) * NR_IRQS);
_sn_irq_desc[i] = p;
}
}
void * __meminit vmemmap_alloc_block(unsigned long size, int node)
{
/* If the main allocator is up use that, fallback to bootmem. */
if (slab_is_available()) {
struct page *page = alloc_pages_node(node,
GFP_KERNEL | __GFP_ZERO, get_order(size));
if (page)
return page_address(page);
return NULL;
} else
return __earlyonly_bootmem_alloc(node, size, size,
__pa(MAX_DMA_ADDRESS));
}
static void *__dma_alloc(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t flag,
struct dma_attrs *attrs, bool is_coherent)
{
unsigned long dma_mask;
struct page *page;
unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
dma_addr_t addr;
dma_mask = dma_alloc_coherent_mask(dev, flag);
flag |= __GFP_ZERO;
again:
page = NULL;
/* CMA can be used only in the context which permits sleeping */
if (flag & __GFP_WAIT)
#ifdef CONFIG_CMA_EXPLICIT_USE
if (dma_get_attr(DMA_ATTR_CMA, attrs)) {
#endif
page = dma_alloc_from_contiguous(dev,
count, get_order(size));
#ifdef CONFIG_CMA_EXPLICIT_USE
if (!page)
return NULL;
}
#endif
/* fallback */
if (!page)
page = alloc_pages_node(dev_to_node(dev), flag, get_order(size));
if (!page)
return NULL;
addr = page_to_phys(page);
if (addr + size > dma_mask) {
__free_pages(page, get_order(size));
if (dma_mask < DMA_BIT_MASK(32) && !(flag & GFP_DMA)) {
flag = (flag & ~GFP_DMA32) | GFP_DMA;
goto again;
}
return NULL;
}
if (is_coherent == false)
__dma_set_pages(page, count, attrs);
*dma_addr = addr;
return page_address(page);
}
static unsigned long __get_free_pages_node(int nid, gfp_t gfp_mask, unsigned int order) {
struct page *page;
#if 0
VM_BUG_ON((gfp_mask & __GFP_HIGHMEM) != 0);
#endif
page = alloc_pages_node(nid, gfp_mask, order);
if (!page)
return 0;
return (unsigned long) page_address(page);
}
/**
* sn_dma_alloc_coherent - allocate memory for coherent DMA
* @dev: device to allocate for
* @size: size of the region
* @dma_handle: DMA (bus) address
* @flags: memory allocation flags
*
* dma_alloc_coherent() returns a pointer to a memory region suitable for
* coherent DMA traffic to/from a PCI device. On SN platforms, this means
* that @dma_handle will have the %PCIIO_DMA_CMD flag set.
*
* This interface is usually used for "command" streams (e.g. the command
* queue for a SCSI controller). See Documentation/DMA-API.txt for
* more information.
*/
void *sn_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t flags)
{
void *cpuaddr;
unsigned long phys_addr;
int node;
struct pci_dev *pdev = to_pci_dev(dev);
struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev);
BUG_ON(dev->bus != &pci_bus_type);
/*
* Allocate the memory.
*/
node = pcibus_to_node(pdev->bus);
if (likely(node >=0)) {
struct page *p = alloc_pages_node(node, flags, get_order(size));
if (likely(p))
cpuaddr = page_address(p);
else
return NULL;
} else
cpuaddr = (void *)__get_free_pages(flags, get_order(size));
if (unlikely(!cpuaddr))
return NULL;
memset(cpuaddr, 0x0, size);
/* physical addr. of the memory we just got */
phys_addr = __pa(cpuaddr);
/*
* 64 bit address translations should never fail.
* 32 bit translations can fail if there are insufficient mapping
* resources.
*/
*dma_handle = provider->dma_map_consistent(pdev, phys_addr, size,
SN_DMA_ADDR_PHYS);
if (!*dma_handle) {
printk(KERN_ERR "%s: out of ATEs\n", __func__);
free_pages((unsigned long)cpuaddr, get_order(size));
return NULL;
}
return cpuaddr;
}
struct thread_info *alloc_thread_info_node(struct task_struct *task, int node)
{
struct page *page;
gfp_t flags = GFP_KERNEL;
#ifdef CONFIG_DEBUG_STACK_USAGE
flags |= __GFP_ZERO;
#endif
page = alloc_pages_node(node, flags, THREAD_SIZE_ORDER);
if (!page)
return NULL;
return (struct thread_info *)page_address(page);
}
struct page *__alloc_pages(int order, int type)
{
const struct list_head *head = &node_order;
struct list_head *ptr = node_type[type];
for (; ptr != head; ptr = ptr->next) {
struct memory_node *node = LIST_ENTRY(ptr, struct memory_node,
link);
struct page *pages = alloc_pages_node(order, node);
if (pages)
return pages;
}
return 0;
}
struct page *__dma_direct_alloc_pages(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
int page_order = get_order(size);
struct page *page = NULL;
u64 phys_mask;
if (attrs & DMA_ATTR_NO_WARN)
gfp |= __GFP_NOWARN;
/* we always manually zero the memory once we are done: */
gfp &= ~__GFP_ZERO;
gfp |= __dma_direct_optimal_gfp_mask(dev, dev->coherent_dma_mask,
&phys_mask);
again:
/* CMA can be used only in the context which permits sleeping */
if (gfpflags_allow_blocking(gfp)) {
page = dma_alloc_from_contiguous(dev, count, page_order,
gfp & __GFP_NOWARN);
if (page && !dma_coherent_ok(dev, page_to_phys(page), size)) {
dma_release_from_contiguous(dev, page, count);
page = NULL;
}
}
if (!page)
page = alloc_pages_node(dev_to_node(dev), gfp, page_order);
if (page && !dma_coherent_ok(dev, page_to_phys(page), size)) {
__free_pages(page, page_order);
page = NULL;
if (IS_ENABLED(CONFIG_ZONE_DMA32) &&
phys_mask < DMA_BIT_MASK(64) &&
!(gfp & (GFP_DMA32 | GFP_DMA))) {
gfp |= GFP_DMA32;
goto again;
}
if (IS_ENABLED(CONFIG_ZONE_DMA) && !(gfp & GFP_DMA)) {
gfp = (gfp & ~GFP_DMA32) | GFP_DMA;
goto again;
}
}
return page;
}
/*
* Allocate an array of struct blk_zone to get nr_zones zone information.
* The allocated array may be smaller than nr_zones.
*/
static struct blk_zone *blk_alloc_zones(int node, unsigned int *nr_zones)
{
size_t size = *nr_zones * sizeof(struct blk_zone);
struct page *page;
int order;
for (order = get_order(size); order >= 0; order--) {
page = alloc_pages_node(node, GFP_NOIO | __GFP_ZERO, order);
if (page) {
*nr_zones = min_t(unsigned int, *nr_zones,
(PAGE_SIZE << order) / sizeof(struct blk_zone));
return page_address(page);
}
}
return NULL;
}
struct page *alloc_migrate_target(struct page *page, unsigned long nid,
int **resultp)
{
/*
* hugeTLB: allocate a destination page from a nearest neighbor node,
* accordance with memory policy of the user process if possible. For
* now as a simple work-around, we use the next node for destination.
* Normal page: use prefer mempolicy for destination if called by
* hotplug, use default mempolicy for destination if called by cma.
*/
if (PageHuge(page))
return alloc_huge_page_node(page_hstate(compound_head(page)),
next_node_in(page_to_nid(page),
node_online_map));
else
return alloc_pages_node(nid, GFP_HIGHUSER_MOVABLE, 0);
}
void init_espfix_ap(int cpu)
{
unsigned int page;
unsigned long addr;
pud_t pud, *pud_p;
pmd_t pmd, *pmd_p;
pte_t pte, *pte_p;
int n, node;
void *stack_page;
pteval_t ptemask;
/* We only have to do this once... */
if (likely(per_cpu(espfix_stack, cpu)))
return; /* Already initialized */
addr = espfix_base_addr(cpu);
page = cpu/ESPFIX_STACKS_PER_PAGE;
/* Did another CPU already set this up? */
stack_page = ACCESS_ONCE(espfix_pages[page]);
if (likely(stack_page))
goto done;
mutex_lock(&espfix_init_mutex);
/* Did we race on the lock? */
stack_page = ACCESS_ONCE(espfix_pages[page]);
if (stack_page)
goto unlock_done;
node = cpu_to_node(cpu);
ptemask = __supported_pte_mask;
pud_p = &espfix_pud_page[pud_index(addr)];
pud = *pud_p;
if (!pud_present(pud)) {
if (cpu)
pmd_p = page_address(alloc_pages_node(node, PGALLOC_GFP, 0));
else
pmd_p = espfix_pmd_page;
pud = __pud(__pa(pmd_p) | (PGTABLE_PROT & ptemask));
paravirt_alloc_pmd(&init_mm, __pa(pmd_p) >> PAGE_SHIFT);
for (n = 0; n < ESPFIX_PUD_CLONES; n++)
set_pud(&pud_p[n], pud);
} else
/* Allocate DMA memory on node near device */
noinline static void *
dma_alloc_pages(struct device *dev, gfp_t gfp, unsigned order)
{
struct page *page;
int node;
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type)
node = pcibus_to_node(to_pci_dev(dev)->bus);
else
#endif
node = numa_node_id();
if (node < first_node(node_online_map))
node = first_node(node_online_map);
page = alloc_pages_node(node, gfp, order);
return page ? page_address(page) : NULL;
}
/* Allocates a contiguous real buffer and creates mappings over it.
* Returns the virtual address of the buffer and sets dma_handle
* to the dma address (mapping) of the first page.
*/
void *iommu_alloc_coherent(struct iommu_table *tbl, size_t size,
dma_addr_t *dma_handle, unsigned long mask, gfp_t flag, int node)
{
void *ret = NULL;
dma_addr_t mapping;
unsigned int order;
unsigned int nio_pages, io_order;
struct page *page;
size = PAGE_ALIGN(size);
order = get_order(size);
/*
* Client asked for way too much space. This is checked later
* anyway. It is easier to debug here for the drivers than in
* the tce tables.
*/
if (order >= IOMAP_MAX_ORDER) {
printk("iommu_alloc_consistent size too large: 0x%lx\n", size);
return NULL;
}
if (!tbl)
return NULL;
/* Alloc enough pages (and possibly more) */
page = alloc_pages_node(node, flag, order);
if (!page)
return NULL;
ret = page_address(page);
memset(ret, 0, size);
/* Set up tces to cover the allocated range */
nio_pages = size >> IOMMU_PAGE_SHIFT;
io_order = get_iommu_order(size);
mapping = iommu_alloc(tbl, ret, nio_pages, DMA_BIDIRECTIONAL,
mask >> IOMMU_PAGE_SHIFT, io_order);
if (mapping == DMA_ERROR_CODE) {
free_pages((unsigned long)ret, order);
return NULL;
}
*dma_handle = mapping;
return ret;
}
/*
* Allocate a pasid table for @dev. It should be called in a
* single-thread context.
*/
int intel_pasid_alloc_table(struct device *dev)
{
struct device_domain_info *info;
struct pasid_table *pasid_table;
struct pasid_table_opaque data;
struct page *pages;
size_t size, count;
int ret, order;
info = dev->archdata.iommu;
if (WARN_ON(!info || !dev_is_pci(dev) ||
!info->pasid_supported || info->pasid_table))
return -EINVAL;
/* DMA alias device already has a pasid table, use it: */
data.pasid_table = &pasid_table;
ret = pci_for_each_dma_alias(to_pci_dev(dev),
&get_alias_pasid_table, &data);
if (ret)
goto attach_out;
pasid_table = kzalloc(sizeof(*pasid_table), GFP_ATOMIC);
if (!pasid_table)
return -ENOMEM;
INIT_LIST_HEAD(&pasid_table->dev);
size = sizeof(struct pasid_entry);
count = min_t(int, pci_max_pasids(to_pci_dev(dev)), intel_pasid_max_id);
order = get_order(size * count);
pages = alloc_pages_node(info->iommu->node,
GFP_ATOMIC | __GFP_ZERO,
order);
if (!pages)
return -ENOMEM;
pasid_table->table = page_address(pages);
pasid_table->order = order;
pasid_table->max_pasid = count;
attach_out:
device_attach_pasid_table(info, pasid_table);
return 0;
}
void * __meminit vmemmap_alloc_block(unsigned long size, int node)
{
if (slab_is_available()) {
struct page *page;
if (node_state(node, N_HIGH_MEMORY))
page = alloc_pages_node(node,
GFP_KERNEL | __GFP_ZERO, get_order(size));
else
page = alloc_pages(GFP_KERNEL | __GFP_ZERO,
get_order(size));
if (page)
return page_address(page);
return NULL;
} else
return __earlyonly_bootmem_alloc(node, size, size,
__pa(MAX_DMA_ADDRESS));
}
void *dma_generic_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t flag,
struct dma_attrs *attrs)
{
unsigned long dma_mask;
struct page *page;
unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
dma_addr_t addr;
dma_mask = dma_alloc_coherent_mask(dev, flag);
flag &= ~__GFP_ZERO;
again:
page = NULL;
/* CMA can be used only in the context which permits sleeping */
if (flag & __GFP_WAIT) {
page = dma_alloc_from_contiguous(dev, count, get_order(size));
if (page && page_to_phys(page) + size > dma_mask) {
dma_release_from_contiguous(dev, page, count);
page = NULL;
}
}
/* fallback */
if (!page)
page = alloc_pages_node(dev_to_node(dev), flag, get_order(size));
if (!page)
return NULL;
addr = page_to_phys(page);
if (addr + size > dma_mask) {
__free_pages(page, get_order(size));
if (dma_mask < DMA_BIT_MASK(32) && !(flag & GFP_DMA)) {
flag = (flag & ~GFP_DMA32) | GFP_DMA;
goto again;
}
return NULL;
}
memset(page_address(page), 0, size);
*dma_addr = addr;
return page_address(page);
}
