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Merge branch 'iommu/page-sizes' into x86/amd 

Conflicts:
	drivers/iommu/amd_iommu.c
This commit is contained in:
Joerg Roedel 2011-12-14 12:41:31 +01:00
parent 175d614673 6c274d1cd5
commit a06ec394c9
8 changed files with 203 additions and 68 deletions
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32
drivers/iommu/amd_iommu.c
View File

@ -44,6 +44,24 @@
#define LOOP_TIMEOUT 100000
/*
* This bitmap is used to advertise the page sizes our hardware support
* to the IOMMU core, which will then use this information to split
* physically contiguous memory regions it is mapping into page sizes
* that we support.
*
* Traditionally the IOMMU core just handed us the mappings directly,
* after making sure the size is an order of a 4KiB page and that the
* mapping has natural alignment.
*
* To retain this behavior, we currently advertise that we support
* all page sizes that are an order of 4KiB.
*
* If at some point we'd like to utilize the IOMMU core's new behavior,
* we could change this to advertise the real page sizes we support.
*/
#define AMD_IOMMU_PGSIZES (~0xFFFUL)
static DEFINE_RWLOCK(amd_iommu_devtable_lock);
/* A list of preallocated protection domains */
@ -3093,9 +3111,8 @@ static int amd_iommu_attach_device(struct iommu_domain *dom,
}
static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova,
phys_addr_t paddr, int gfp_order, int iommu_prot)
phys_addr_t paddr, size_t page_size, int iommu_prot)
{
unsigned long page_size = 0x1000UL << gfp_order;
struct protection_domain *domain = dom->priv;
int prot = 0;
int ret;
@ -3115,24 +3132,22 @@ static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova,
return ret;
}
static int amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova,
int gfp_order)
static size_t amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova,
size_t page_size)
{
struct protection_domain *domain = dom->priv;
unsigned long page_size, unmap_size;
size_t unmap_size;
if (domain->mode == PAGE_MODE_NONE)
return -EINVAL;
page_size = 0x1000UL << gfp_order;
mutex_lock(&domain->api_lock);
unmap_size = iommu_unmap_page(domain, iova, page_size);
mutex_unlock(&domain->api_lock);
domain_flush_tlb_pde(domain);
return get_order(unmap_size);
return unmap_size;
}
static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom,
@ -3182,6 +3197,7 @@ static struct iommu_ops amd_iommu_ops = {
.unmap = amd_iommu_unmap,
.iova_to_phys = amd_iommu_iova_to_phys,
.domain_has_cap = amd_iommu_domain_has_cap,
.pgsize_bitmap = AMD_IOMMU_PGSIZES,
};
/*****************************************************************************

30
drivers/iommu/intel-iommu.c
View File

@ -78,6 +78,24 @@
#define LEVEL_STRIDE (9)
#define LEVEL_MASK (((u64)1 << LEVEL_STRIDE) - 1)
/*
* This bitmap is used to advertise the page sizes our hardware support
* to the IOMMU core, which will then use this information to split
* physically contiguous memory regions it is mapping into page sizes
* that we support.
*
* Traditionally the IOMMU core just handed us the mappings directly,
* after making sure the size is an order of a 4KiB page and that the
* mapping has natural alignment.
*
* To retain this behavior, we currently advertise that we support
* all page sizes that are an order of 4KiB.
*
* If at some point we'd like to utilize the IOMMU core's new behavior,
* we could change this to advertise the real page sizes we support.
*/
#define INTEL_IOMMU_PGSIZES (~0xFFFUL)
static inline int agaw_to_level(int agaw)
{
return agaw + 2;
@ -3979,12 +3997,11 @@ static void intel_iommu_detach_device(struct iommu_domain *domain,
static int intel_iommu_map(struct iommu_domain *domain,
unsigned long iova, phys_addr_t hpa,
int gfp_order, int iommu_prot)
size_t size, int iommu_prot)
{
struct dmar_domain *dmar_domain = domain->priv;
u64 max_addr;
int prot = 0;
size_t size;
int ret;
if (iommu_prot & IOMMU_READ)
@ -3994,7 +4011,6 @@ static int intel_iommu_map(struct iommu_domain *domain,
if ((iommu_prot & IOMMU_CACHE) && dmar_domain->iommu_snooping)
prot |= DMA_PTE_SNP;
size = PAGE_SIZE << gfp_order;
max_addr = iova + size;
if (dmar_domain->max_addr < max_addr) {
u64 end;
@ -4017,11 +4033,10 @@ static int intel_iommu_map(struct iommu_domain *domain,
return ret;
}
static int intel_iommu_unmap(struct iommu_domain *domain,
unsigned long iova, int gfp_order)
static size_t intel_iommu_unmap(struct iommu_domain *domain,
unsigned long iova, size_t size)
{
struct dmar_domain *dmar_domain = domain->priv;
size_t size = PAGE_SIZE << gfp_order;
int order;
order = dma_pte_clear_range(dmar_domain, iova >> VTD_PAGE_SHIFT,
@ -4030,7 +4045,7 @@ static int intel_iommu_unmap(struct iommu_domain *domain,
if (dmar_domain->max_addr == iova + size)
dmar_domain->max_addr = iova;
return order;
return PAGE_SIZE << order;
}
static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain,
@ -4069,6 +4084,7 @@ static struct iommu_ops intel_iommu_ops = {
.unmap = intel_iommu_unmap,
.iova_to_phys = intel_iommu_iova_to_phys,
.domain_has_cap = intel_iommu_domain_has_cap,
.pgsize_bitmap = INTEL_IOMMU_PGSIZES,
};
static void __devinit quirk_iommu_rwbf(struct pci_dev *dev)

115
drivers/iommu/iommu.c
View File

@ -16,6 +16,8 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define pr_fmt(fmt) "%s: " fmt, __func__
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/bug.h>
@ -157,32 +159,125 @@ int iommu_domain_has_cap(struct iommu_domain *domain,
EXPORT_SYMBOL_GPL(iommu_domain_has_cap);
int iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, int gfp_order, int prot)
phys_addr_t paddr, size_t size, int prot)
{
size_t size;
unsigned long orig_iova = iova;
unsigned int min_pagesz;
size_t orig_size = size;
int ret = 0;
if (unlikely(domain->ops->map == NULL))
return -ENODEV;
size = PAGE_SIZE << gfp_order;
/* find out the minimum page size supported */
min_pagesz = 1 << __ffs(domain->ops->pgsize_bitmap);
BUG_ON(!IS_ALIGNED(iova | paddr, size));
/*
* both the virtual address and the physical one, as well as
* the size of the mapping, must be aligned (at least) to the
* size of the smallest page supported by the hardware
*/
if (!IS_ALIGNED(iova | paddr | size, min_pagesz)) {
pr_err("unaligned: iova 0x%lx pa 0x%lx size 0x%lx min_pagesz "
"0x%x\n", iova, (unsigned long)paddr,
(unsigned long)size, min_pagesz);
return -EINVAL;
}
return domain->ops->map(domain, iova, paddr, gfp_order, prot);
pr_debug("map: iova 0x%lx pa 0x%lx size 0x%lx\n", iova,
(unsigned long)paddr, (unsigned long)size);
while (size) {
unsigned long pgsize, addr_merge = iova | paddr;
unsigned int pgsize_idx;
/* Max page size that still fits into 'size' */
pgsize_idx = __fls(size);
/* need to consider alignment requirements ? */
if (likely(addr_merge)) {
/* Max page size allowed by both iova and paddr */
unsigned int align_pgsize_idx = __ffs(addr_merge);
pgsize_idx = min(pgsize_idx, align_pgsize_idx);
}
/* build a mask of acceptable page sizes */
pgsize = (1UL << (pgsize_idx + 1)) - 1;
/* throw away page sizes not supported by the hardware */
pgsize &= domain->ops->pgsize_bitmap;
/* make sure we're still sane */
BUG_ON(!pgsize);
/* pick the biggest page */
pgsize_idx = __fls(pgsize);
pgsize = 1UL << pgsize_idx;
pr_debug("mapping: iova 0x%lx pa 0x%lx pgsize %lu\n", iova,
(unsigned long)paddr, pgsize);
ret = domain->ops->map(domain, iova, paddr, pgsize, prot);
if (ret)
break;
iova += pgsize;
paddr += pgsize;
size -= pgsize;
}
/* unroll mapping in case something went wrong */
if (ret)
iommu_unmap(domain, orig_iova, orig_size - size);
return ret;
}
EXPORT_SYMBOL_GPL(iommu_map);
int iommu_unmap(struct iommu_domain *domain, unsigned long iova, int gfp_order)
size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size)
{
size_t size;
size_t unmapped_page, unmapped = 0;
unsigned int min_pagesz;
if (unlikely(domain->ops->unmap == NULL))
return -ENODEV;
size = PAGE_SIZE << gfp_order;
/* find out the minimum page size supported */
min_pagesz = 1 << __ffs(domain->ops->pgsize_bitmap);
BUG_ON(!IS_ALIGNED(iova, size));
/*
* The virtual address, as well as the size of the mapping, must be
* aligned (at least) to the size of the smallest page supported
* by the hardware
*/
if (!IS_ALIGNED(iova | size, min_pagesz)) {
pr_err("unaligned: iova 0x%lx size 0x%lx min_pagesz 0x%x\n",
iova, (unsigned long)size, min_pagesz);
return -EINVAL;
}
return domain->ops->unmap(domain, iova, gfp_order);
pr_debug("unmap this: iova 0x%lx size 0x%lx\n", iova,
(unsigned long)size);
/*
* Keep iterating until we either unmap 'size' bytes (or more)
* or we hit an area that isn't mapped.
*/
while (unmapped < size) {
size_t left = size - unmapped;
unmapped_page = domain->ops->unmap(domain, iova, left);
if (!unmapped_page)
break;
pr_debug("unmapped: iova 0x%lx size %lx\n", iova,
(unsigned long)unmapped_page);
iova += unmapped_page;
unmapped += unmapped_page;
}
return unmapped;
}
EXPORT_SYMBOL_GPL(iommu_unmap);

25
drivers/iommu/msm_iommu.c
View File

@ -42,6 +42,9 @@ __asm__ __volatile__ ( \
#define RCP15_PRRR(reg) MRC(reg, p15, 0, c10, c2, 0)
#define RCP15_NMRR(reg) MRC(reg, p15, 0, c10, c2, 1)
/* bitmap of the page sizes currently supported */
#define MSM_IOMMU_PGSIZES (SZ_4K | SZ_64K | SZ_1M | SZ_16M)
static int msm_iommu_tex_class[4];
DEFINE_SPINLOCK(msm_iommu_lock);
@ -352,7 +355,7 @@ fail:
}
static int msm_iommu_map(struct iommu_domain *domain, unsigned long va,
phys_addr_t pa, int order, int prot)
phys_addr_t pa, size_t len, int prot)
{
struct msm_priv *priv;
unsigned long flags;
@ -363,7 +366,6 @@ static int msm_iommu_map(struct iommu_domain *domain, unsigned long va,
unsigned long *sl_pte;
unsigned long sl_offset;
unsigned int pgprot;
size_t len = 0x1000UL << order;
int ret = 0, tex, sh;
spin_lock_irqsave(&msm_iommu_lock, flags);
@ -463,8 +465,8 @@ fail:
return ret;
}
static int msm_iommu_unmap(struct iommu_domain *domain, unsigned long va,
int order)
static size_t msm_iommu_unmap(struct iommu_domain *domain, unsigned long va,
size_t len)
{
struct msm_priv *priv;
unsigned long flags;
@ -474,7 +476,6 @@ static int msm_iommu_unmap(struct iommu_domain *domain, unsigned long va,
unsigned long *sl_table;
unsigned long *sl_pte;
unsigned long sl_offset;
size_t len = 0x1000UL << order;
int i, ret = 0;
spin_lock_irqsave(&msm_iommu_lock, flags);
@ -544,15 +545,12 @@ static int msm_iommu_unmap(struct iommu_domain *domain, unsigned long va,
ret = __flush_iotlb(domain);
/*
* the IOMMU API requires us to return the order of the unmapped
* page (on success).
*/
if (!ret)
ret = order;
fail:
spin_unlock_irqrestore(&msm_iommu_lock, flags);
return ret;
/* the IOMMU API requires us to return how many bytes were unmapped */
len = ret ? 0 : len;
return len;
}
static phys_addr_t msm_iommu_iova_to_phys(struct iommu_domain *domain,
@ -684,7 +682,8 @@ static struct iommu_ops msm_iommu_ops = {
.map = msm_iommu_map,
.unmap = msm_iommu_unmap,
.iova_to_phys = msm_iommu_iova_to_phys,
.domain_has_cap = msm_iommu_domain_has_cap
.domain_has_cap = msm_iommu_domain_has_cap,
.pgsize_bitmap = MSM_IOMMU_PGSIZES,
};
static int __init get_tex_class(int icp, int ocp, int mt, int nos)

18
drivers/iommu/omap-iommu.c
View File

@ -33,6 +33,9 @@
(__i < (n)) && (cr = __iotlb_read_cr((obj), __i), true); \
__i++)
/* bitmap of the page sizes currently supported */
#define OMAP_IOMMU_PGSIZES (SZ_4K | SZ_64K | SZ_1M | SZ_16M)
/**
* struct omap_iommu_domain - omap iommu domain
* @pgtable: the page table
@ -1019,12 +1022,11 @@ static void iopte_cachep_ctor(void *iopte)
}
static int omap_iommu_map(struct iommu_domain *domain, unsigned long da,
phys_addr_t pa, int order, int prot)
phys_addr_t pa, size_t bytes, int prot)
{
struct omap_iommu_domain *omap_domain = domain->priv;
struct omap_iommu *oiommu = omap_domain->iommu_dev;
struct device *dev = oiommu->dev;
size_t bytes = PAGE_SIZE << order;
struct iotlb_entry e;
int omap_pgsz;
u32 ret, flags;
@ -1049,19 +1051,16 @@ static int omap_iommu_map(struct iommu_domain *domain, unsigned long da,
return ret;
}
static int omap_iommu_unmap(struct iommu_domain *domain, unsigned long da,
int order)
static size_t omap_iommu_unmap(struct iommu_domain *domain, unsigned long da,
size_t size)
{
struct omap_iommu_domain *omap_domain = domain->priv;
struct omap_iommu *oiommu = omap_domain->iommu_dev;
struct device *dev = oiommu->dev;
size_t unmap_size;
dev_dbg(dev, "unmapping da 0x%lx order %d\n", da, order);
dev_dbg(dev, "unmapping da 0x%lx size %u\n", da, size);
unmap_size = iopgtable_clear_entry(oiommu, da);
return unmap_size ? get_order(unmap_size) : -EINVAL;
return iopgtable_clear_entry(oiommu, da);
}
static int
@ -1211,6 +1210,7 @@ static struct iommu_ops omap_iommu_ops = {
.unmap = omap_iommu_unmap,
.iova_to_phys = omap_iommu_iova_to_phys,
.domain_has_cap = omap_iommu_domain_has_cap,
.pgsize_bitmap = OMAP_IOMMU_PGSIZES,
};
static int __init omap_iommu_init(void)

17
drivers/iommu/omap-iovmm.c
View File

@ -410,7 +410,6 @@ static int map_iovm_area(struct iommu_domain *domain, struct iovm_struct *new,
unsigned int i, j;
struct scatterlist *sg;
u32 da = new->da_start;
int order;
if (!domain || !sgt)
return -EINVAL;
@ -429,12 +428,10 @@ static int map_iovm_area(struct iommu_domain *domain, struct iovm_struct *new,
if (bytes_to_iopgsz(bytes) < 0)
goto err_out;
order = get_order(bytes);
pr_debug("%s: [%d] %08x %08x(%x)\n", __func__,
i, da, pa, bytes);
err = iommu_map(domain, da, pa, order, flags);
err = iommu_map(domain, da, pa, bytes, flags);
if (err)
goto err_out;
@ -449,10 +446,9 @@ err_out:
size_t bytes;
bytes = sg->length + sg->offset;
order = get_order(bytes);
/* ignore failures.. we're already handling one */
iommu_unmap(domain, da, order);
iommu_unmap(domain, da, bytes);
da += bytes;
}
@ -467,7 +463,8 @@ static void unmap_iovm_area(struct iommu_domain *domain, struct omap_iommu *obj,
size_t total = area->da_end - area->da_start;
const struct sg_table *sgt = area->sgt;
struct scatterlist *sg;
int i, err;
int i;
size_t unmapped;
BUG_ON(!sgtable_ok(sgt));
BUG_ON((!total) || !IS_ALIGNED(total, PAGE_SIZE));
@ -475,13 +472,11 @@ static void unmap_iovm_area(struct iommu_domain *domain, struct omap_iommu *obj,
start = area->da_start;
for_each_sg(sgt->sgl, sg, sgt->nents, i) {
size_t bytes;
int order;
bytes = sg->length + sg->offset;
order = get_order(bytes);
err = iommu_unmap(domain, start, order);
if (err < 0)
unmapped = iommu_unmap(domain, start, bytes);
if (unmapped < bytes)
break;
dev_dbg(obj->dev, "%s: unmap %08x(%x) %08x\n",

26
include/linux/iommu.h
View File

@ -48,19 +48,33 @@ struct iommu_domain {
#ifdef CONFIG_IOMMU_API
/**
* struct iommu_ops - iommu ops and capabilities
* @domain_init: init iommu domain
* @domain_destroy: destroy iommu domain
* @attach_dev: attach device to an iommu domain
* @detach_dev: detach device from an iommu domain
* @map: map a physically contiguous memory region to an iommu domain
* @unmap: unmap a physically contiguous memory region from an iommu domain
* @iova_to_phys: translate iova to physical address
* @domain_has_cap: domain capabilities query
* @commit: commit iommu domain
* @pgsize_bitmap: bitmap of supported page sizes
*/
struct iommu_ops {
int (*domain_init)(struct iommu_domain *domain);
void (*domain_destroy)(struct iommu_domain *domain);
int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
int (*map)(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, int gfp_order, int prot);
int (*unmap)(struct iommu_domain *domain, unsigned long iova,
int gfp_order);
phys_addr_t paddr, size_t size, int prot);
size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
size_t size);
phys_addr_t (*iova_to_phys)(struct iommu_domain *domain,
unsigned long iova);
int (*domain_has_cap)(struct iommu_domain *domain,
unsigned long cap);
unsigned long pgsize_bitmap;
};
extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops);
@ -72,9 +86,9 @@ extern int iommu_attach_device(struct iommu_domain *domain,
extern void iommu_detach_device(struct iommu_domain *domain,
struct device *dev);
extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, int gfp_order, int prot);
extern int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
int gfp_order);
phys_addr_t paddr, size_t size, int prot);
extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
size_t size);
extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
unsigned long iova);
extern int iommu_domain_has_cap(struct iommu_domain *domain,

8
virt/kvm/iommu.c
View File

@ -113,7 +113,7 @@ int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
/* Map into IO address space */
r = iommu_map(domain, gfn_to_gpa(gfn), pfn_to_hpa(pfn),
get_order(page_size), flags);
page_size, flags);
if (r) {
printk(KERN_ERR "kvm_iommu_map_address:"
"iommu failed to map pfn=%llx\n", pfn);
@ -292,15 +292,15 @@ static void kvm_iommu_put_pages(struct kvm *kvm,
while (gfn < end_gfn) {
unsigned long unmap_pages;
int order;
size_t size;
/* Get physical address */
phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn));
pfn = phys >> PAGE_SHIFT;
/* Unmap address from IO address space */
order = iommu_unmap(domain, gfn_to_gpa(gfn), 0);
unmap_pages = 1ULL << order;
size = iommu_unmap(domain, gfn_to_gpa(gfn), PAGE_SIZE);
unmap_pages = 1ULL << get_order(size);
/* Unpin all pages we just unmapped to not leak any memory */
kvm_unpin_pages(kvm, pfn, unmap_pages);