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drm/i915/gtt: Wrap page_table with page_directory

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The page directory extends the page table with the shadow entries. Make
the page directory struct embed the page table for easier code reuse.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190712094327.24437-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-07-12 10:43:22 +01:00
parent 6eebfe8a10
commit 57a7e30546
3 changed files with 57 additions and 61 deletions

2
drivers/gpu/drm/i915/gt/intel_ringbuffer.c
View File

@ -1512,7 +1512,7 @@ static int load_pd_dir(struct i915_request *rq, const struct i915_ppgtt *ppgtt)
*cs++ = MI_LOAD_REGISTER_IMM(1);
*cs++ = i915_mmio_reg_offset(RING_PP_DIR_BASE(engine->mmio_base));
*cs++ = ppgtt->pd->base.ggtt_offset << 10;
*cs++ = px_base(ppgtt->pd)->ggtt_offset << 10;
intel_ring_advance(rq, cs);

100
drivers/gpu/drm/i915/i915_gem_gtt.c
View File

@ -107,6 +107,8 @@
*
*/
#define as_pd(x) container_of((x), typeof(struct i915_page_directory), pt)
static int
i915_get_ggtt_vma_pages(struct i915_vma *vma);
@ -711,28 +713,17 @@ static struct i915_page_table *alloc_pt(struct i915_address_space *vm)
return pt;
}
static void free_pt(struct i915_address_space *vm, struct i915_page_table *pt)
{
cleanup_page_dma(vm, &pt->base);
kfree(pt);
}
static struct i915_page_directory *__alloc_pd(void)
{
struct i915_page_directory *pd;
pd = kmalloc(sizeof(*pd), I915_GFP_ALLOW_FAIL);
if (unlikely(!pd))
return NULL;
memset(&pd->base, 0, sizeof(pd->base));
atomic_set(&pd->used, 0);
atomic_set(px_used(pd), 0);
spin_lock_init(&pd->lock);
/* for safety */
pd->entry[0] = NULL;
return pd;
}
@ -744,7 +735,7 @@ static struct i915_page_directory *alloc_pd(struct i915_address_space *vm)
if (unlikely(!pd))
return ERR_PTR(-ENOMEM);
if (unlikely(setup_page_dma(vm, &pd->base))) {
if (unlikely(setup_page_dma(vm, px_base(pd)))) {
kfree(pd);
return ERR_PTR(-ENOMEM);
}
@ -752,13 +743,14 @@ static struct i915_page_directory *alloc_pd(struct i915_address_space *vm)
return pd;
}
static void free_pd(struct i915_address_space *vm,
struct i915_page_directory *pd)
static void free_pd(struct i915_address_space *vm, struct i915_page_dma *pd)
{
cleanup_page_dma(vm, &pd->base);
cleanup_page_dma(vm, pd);
kfree(pd);
}
#define free_px(vm, px) free_pd(vm, px_base(px))
static void init_pd(struct i915_page_directory *pd,
struct i915_page_dma *scratch)
{
@ -783,9 +775,9 @@ __set_pd_entry(struct i915_page_directory * const pd,
struct i915_page_dma * const to,
u64 (*encode)(const dma_addr_t, const enum i915_cache_level))
{
GEM_BUG_ON(atomic_read(&pd->used) > 512);
GEM_BUG_ON(atomic_read(px_used(pd)) > 512);
atomic_inc(&pd->used);
atomic_inc(px_used(pd));
pd->entry[pde] = to;
write_dma_entry(px_base(pd), pde, encode(to->daddr, I915_CACHE_LLC));
}
@ -796,11 +788,11 @@ __clear_pd_entry(struct i915_page_directory * const pd,
struct i915_page_dma * const to,
u64 (*encode)(const dma_addr_t, const enum i915_cache_level))
{
GEM_BUG_ON(atomic_read(&pd->used) == 0);
GEM_BUG_ON(atomic_read(px_used(pd)) == 0);
write_dma_entry(px_base(pd), pde, encode(to->daddr, I915_CACHE_LLC));
pd->entry[pde] = to;
atomic_dec(&pd->used);
atomic_dec(px_used(pd));
}
#define set_pd_entry(pd, pde, to) \
@ -812,13 +804,13 @@ __clear_pd_entry(struct i915_page_directory * const pd,
static bool
release_pd_entry(struct i915_page_directory * const pd,
const unsigned short pde,
atomic_t *counter,
struct i915_page_table * const pt,
struct i915_page_dma * const scratch)
{
bool free = false;
spin_lock(&pd->lock);
if (atomic_dec_and_test(counter)) {
if (atomic_dec_and_test(&pt->used)) {
clear_pd_entry(pd, pde, scratch);
free = true;
}
@ -869,8 +861,8 @@ static void gen8_ppgtt_clear_pd(struct i915_address_space *vm,
atomic_inc(&pt->used);
gen8_ppgtt_clear_pt(vm, pt, start, length);
if (release_pd_entry(pd, pde, &pt->used, &vm->scratch_pt))
free_pt(vm, pt);
if (release_pd_entry(pd, pde, pt, &vm->scratch_pt))
free_px(vm, pt);
}
}
@ -887,10 +879,10 @@ static void gen8_ppgtt_clear_pdp(struct i915_address_space *vm,
gen8_for_each_pdpe(pd, pdp, start, length, pdpe) {
GEM_BUG_ON(px_base(pd) == &vm->scratch_pd);
atomic_inc(&pd->used);
atomic_inc(px_used(pd));
gen8_ppgtt_clear_pd(vm, pd, start, length);
if (release_pd_entry(pdp, pdpe, &pd->used, &vm->scratch_pd))
free_pd(vm, pd);
if (release_pd_entry(pdp, pdpe, &pd->pt, &vm->scratch_pd))
free_px(vm, pd);
}
}
@ -917,10 +909,10 @@ static void gen8_ppgtt_clear_4lvl(struct i915_address_space *vm,
gen8_for_each_pml4e(pdp, pml4, start, length, pml4e) {
GEM_BUG_ON(px_base(pdp) == &vm->scratch_pdp);
atomic_inc(&pdp->used);
atomic_inc(px_used(pdp));
gen8_ppgtt_clear_pdp(vm, pdp, start, length);
if (release_pd_entry(pml4, pml4e, &pdp->used, &vm->scratch_pdp))
free_pd(vm, pdp);
if (release_pd_entry(pml4, pml4e, &pdp->pt, &vm->scratch_pdp))
free_px(vm, pdp);
}
}
@ -1175,7 +1167,7 @@ static void gen8_free_page_tables(struct i915_address_space *vm,
for (i = 0; i < I915_PDES; i++) {
if (pd->entry[i] != &vm->scratch_pt)
free_pt(vm, pd->entry[i]);
free_pd(vm, pd->entry[i]);
}
}
@ -1253,9 +1245,9 @@ static int gen8_ppgtt_notify_vgt(struct i915_ppgtt *ppgtt, bool create)
int i;
if (create)
atomic_inc(&ppgtt->pd->used); /* never remove */
atomic_inc(px_used(ppgtt->pd)); /* never remove */
else
atomic_dec(&ppgtt->pd->used);
atomic_dec(px_used(ppgtt->pd));
if (i915_vm_is_4lvl(vm)) {
const u64 daddr = px_dma(ppgtt->pd);
@ -1296,7 +1288,7 @@ static void gen8_ppgtt_cleanup_3lvl(struct i915_address_space *vm,
free_pd(vm, pdp->entry[i]);
}
free_pd(vm, pdp);
free_px(vm, pdp);
}
static void gen8_ppgtt_cleanup_4lvl(struct i915_ppgtt *ppgtt)
@ -1313,7 +1305,7 @@ static void gen8_ppgtt_cleanup_4lvl(struct i915_ppgtt *ppgtt)
gen8_ppgtt_cleanup_3lvl(&ppgtt->vm, pdp);
}
free_pd(&ppgtt->vm, pml4);
free_px(&ppgtt->vm, pml4);
}
static void gen8_ppgtt_cleanup(struct i915_address_space *vm)
@ -1377,7 +1369,7 @@ unwind:
gen8_ppgtt_clear_pd(vm, pd, from, start - from);
out:
if (alloc)
free_pt(vm, alloc);
free_px(vm, alloc);
return ret;
}
@ -1413,7 +1405,7 @@ static int gen8_ppgtt_alloc_pdp(struct i915_address_space *vm,
pd = pdp->entry[pdpe];
}
}
atomic_inc(&pd->used);
atomic_inc(px_used(pd));
spin_unlock(&pdp->lock);
ret = gen8_ppgtt_alloc_pd(vm, pd, start, length);
@ -1421,19 +1413,19 @@ static int gen8_ppgtt_alloc_pdp(struct i915_address_space *vm,
goto unwind_pd;
spin_lock(&pdp->lock);
atomic_dec(&pd->used);
atomic_dec(px_used(pd));
}
spin_unlock(&pdp->lock);
goto out;
unwind_pd:
if (release_pd_entry(pdp, pdpe, &pd->used, &vm->scratch_pd))
free_pd(vm, pd);
if (release_pd_entry(pdp, pdpe, &pd->pt, &vm->scratch_pd))
free_px(vm, pd);
unwind:
gen8_ppgtt_clear_pdp(vm, pdp, from, start - from);
out:
if (alloc)
free_pd(vm, alloc);
free_px(vm, alloc);
return ret;
}
@ -1477,7 +1469,7 @@ static int gen8_ppgtt_alloc_4lvl(struct i915_address_space *vm,
pdp = pml4->entry[pml4e];
}
}
atomic_inc(&pdp->used);
atomic_inc(px_used(pdp));
spin_unlock(&pml4->lock);
ret = gen8_ppgtt_alloc_pdp(vm, pdp, start, length);
@ -1485,19 +1477,19 @@ static int gen8_ppgtt_alloc_4lvl(struct i915_address_space *vm,
goto unwind_pdp;
spin_lock(&pml4->lock);
atomic_dec(&pdp->used);
atomic_dec(px_used(pdp));
}
spin_unlock(&pml4->lock);
goto out;
unwind_pdp:
if (release_pd_entry(pml4, pml4e, &pdp->used, &vm->scratch_pdp))
free_pd(vm, pdp);
if (release_pd_entry(pml4, pml4e, &pdp->pt, &vm->scratch_pdp))
free_px(vm, pdp);
unwind:
gen8_ppgtt_clear_4lvl(vm, from, start - from);
out:
if (alloc)
free_pd(vm, alloc);
free_px(vm, alloc);
return ret;
}
@ -1523,7 +1515,7 @@ static int gen8_preallocate_top_level_pdp(struct i915_ppgtt *ppgtt)
unwind:
gen8_ppgtt_clear_pdp(vm, pdp, from, start - from);
atomic_set(&pdp->used, 0);
atomic_set(px_used(pdp), 0);
return -ENOMEM;
}
@ -1550,7 +1542,7 @@ static void init_pd_n(struct i915_address_space *vm,
const unsigned int entries)
{
const u64 daddr = gen8_pde_encode(to->daddr, I915_CACHE_LLC);
u64 * const vaddr = kmap_atomic(pd->base.page);
u64 * const vaddr = kmap_atomic_px(pd);
memset64(vaddr, daddr, entries);
kunmap_atomic(vaddr);
@ -1578,7 +1570,7 @@ gen8_alloc_top_pd(struct i915_address_space *vm)
pd->entry[GEN8_3LVL_PDPES] = NULL;
if (unlikely(setup_page_dma(vm, &pd->base))) {
if (unlikely(setup_page_dma(vm, px_base(pd)))) {
kfree(pd);
return ERR_PTR(-ENOMEM);
}
@ -1654,7 +1646,7 @@ static struct i915_ppgtt *gen8_ppgtt_create(struct drm_i915_private *i915)
return ppgtt;
err_free_pd:
free_pd(&ppgtt->vm, ppgtt->pd);
free_px(&ppgtt->vm, ppgtt->pd);
err_free_scratch:
free_scratch(&ppgtt->vm);
err_free:
@ -1865,7 +1857,7 @@ unwind_out:
gen6_ppgtt_clear_range(vm, from, start - from);
out:
if (alloc)
free_pt(vm, alloc);
free_px(vm, alloc);
intel_runtime_pm_put(&vm->i915->runtime_pm, wakeref);
return ret;
}
@ -1906,7 +1898,7 @@ static void gen6_ppgtt_free_pd(struct gen6_ppgtt *ppgtt)
gen6_for_all_pdes(pt, pd, pde)
if (px_base(pt) != &ppgtt->base.vm.scratch_pt)
free_pt(&ppgtt->base.vm, pt);
free_px(&ppgtt->base.vm, pt);
}
static void gen6_ppgtt_cleanup(struct i915_address_space *vm)
@ -1947,7 +1939,7 @@ static int pd_vma_bind(struct i915_vma *vma,
struct i915_page_table *pt;
unsigned int pde;
ppgtt->base.pd->base.ggtt_offset = ggtt_offset * sizeof(gen6_pte_t);
px_base(ppgtt->base.pd)->ggtt_offset = ggtt_offset * sizeof(gen6_pte_t);
ppgtt->pd_addr = (gen6_pte_t __iomem *)ggtt->gsm + ggtt_offset;
gen6_for_all_pdes(pt, ppgtt->base.pd, pde)
@ -1975,7 +1967,7 @@ static void pd_vma_unbind(struct i915_vma *vma)
if (px_base(pt) == scratch || atomic_read(&pt->used))
continue;
free_pt(&ppgtt->base.vm, pt);
free_px(&ppgtt->base.vm, pt);
pd->entry[pde] = scratch;
}

16
drivers/gpu/drm/i915/i915_gem_gtt.h
View File

@ -246,8 +246,7 @@ struct i915_page_table {
};
struct i915_page_directory {
struct i915_page_dma base;
atomic_t used;
struct i915_page_table pt;
spinlock_t lock;
void *entry[512];
};
@ -262,10 +261,16 @@ struct i915_page_directory {
#define px_base(px) \
__px_choose_expr(px, struct i915_page_dma *, __x, \
__px_choose_expr(px, struct i915_page_table *, &__x->base, \
__px_choose_expr(px, struct i915_page_directory *, &__x->base, \
__px_choose_expr(px, struct i915_page_directory *, &__x->pt.base, \
(void)0)))
#define px_dma(px) (px_base(px)->daddr)
#define px_pt(px) \
__px_choose_expr(px, struct i915_page_table *, __x, \
__px_choose_expr(px, struct i915_page_directory *, &__x->pt, \
(void)0))
#define px_used(px) (&px_pt(px)->used)
struct i915_vma_ops {
/* Map an object into an address space with the given cache flags. */
int (*bind_vma)(struct i915_vma *vma,
@ -600,10 +605,9 @@ static inline u64 gen8_pte_count(u64 address, u64 length)
static inline dma_addr_t
i915_page_dir_dma_addr(const struct i915_ppgtt *ppgtt, const unsigned int n)
{
struct i915_page_directory *pd;
struct i915_page_dma *pt = ppgtt->pd->entry[n];
pd = i915_pdp_entry(ppgtt->pd, n);
return px_dma(pd);
return px_dma(pt);
}
static inline struct i915_ggtt *