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drm/i915/gtt: Prefer i915_vm_is_48bit() over macro 

If we setup the vm size early, we can use the newly introduced
i915_vm_is_48bit() in majority of callsites wanting to know the vm size.

As we operate either with 3lvl or 4lvl page table structure,
wrap the vm size query inside a function which tells us if
4lvl setup is needed for particular vm, as the following
code uses the function names where level is noted.

v2: use_4lvl (Chris)

Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1488295691-9404-3-git-send-email-mika.kuoppala@intel.com
This commit is contained in:
Mika Kuoppala 2017-02-28 17:28:09 +02:00 committed by Mika Kuoppala
parent 54af56dbf8
commit 1e6437b0e0
1 changed files with 38 additions and 25 deletions
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63
drivers/gpu/drm/i915/i915_gem_gtt.c
View File

@ -548,13 +548,18 @@ static void __pdp_fini(struct i915_page_directory_pointer *pdp)
pdp->page_directory = NULL;
}
static inline bool use_4lvl(const struct i915_address_space *vm)
{
return i915_vm_is_48bit(vm);
}
static struct i915_page_directory_pointer *
alloc_pdp(struct i915_address_space *vm)
{
struct i915_page_directory_pointer *pdp;
int ret = -ENOMEM;
WARN_ON(!USES_FULL_48BIT_PPGTT(vm->i915));
WARN_ON(!use_4lvl(vm));
pdp = kzalloc(sizeof(*pdp), GFP_KERNEL);
if (!pdp)
@ -582,10 +587,12 @@ static void free_pdp(struct i915_address_space *vm,
struct i915_page_directory_pointer *pdp)
{
__pdp_fini(pdp);
if (USES_FULL_48BIT_PPGTT(vm->i915)) {
cleanup_px(vm, pdp);
kfree(pdp);
}
if (!use_4lvl(vm))
return;
cleanup_px(vm, pdp);
kfree(pdp);
}
static void gen8_initialize_pdp(struct i915_address_space *vm,
@ -739,7 +746,7 @@ static void gen8_ppgtt_set_pdpe(struct i915_address_space *vm,
gen8_ppgtt_pdpe_t *vaddr;
pdp->page_directory[pdpe] = pd;
if (!USES_FULL_48BIT_PPGTT(vm->i915))
if (!use_4lvl(vm))
return;
vaddr = kmap_atomic_px(pdp);
@ -804,7 +811,7 @@ static void gen8_ppgtt_clear_4lvl(struct i915_address_space *vm,
struct i915_page_directory_pointer *pdp;
unsigned int pml4e;
GEM_BUG_ON(!USES_FULL_48BIT_PPGTT(vm->i915));
GEM_BUG_ON(!use_4lvl(vm));
gen8_for_each_pml4e(pdp, pml4, start, length, pml4e) {
GEM_BUG_ON(pdp == vm->scratch_pdp);
@ -968,7 +975,7 @@ static int gen8_init_scratch(struct i915_address_space *vm)
goto free_pt;
}
if (USES_FULL_48BIT_PPGTT(dev)) {
if (use_4lvl(vm)) {
vm->scratch_pdp = alloc_pdp(vm);
if (IS_ERR(vm->scratch_pdp)) {
ret = PTR_ERR(vm->scratch_pdp);
@ -978,7 +985,7 @@ static int gen8_init_scratch(struct i915_address_space *vm)
gen8_initialize_pt(vm, vm->scratch_pt);
gen8_initialize_pd(vm, vm->scratch_pd);
if (USES_FULL_48BIT_PPGTT(dev_priv))
if (use_4lvl(vm))
gen8_initialize_pdp(vm, vm->scratch_pdp);
return 0;
@ -995,12 +1002,13 @@ static int gen8_init_scratch(struct i915_address_space *vm)
static int gen8_ppgtt_notify_vgt(struct i915_hw_ppgtt *ppgtt, bool create)
{
struct i915_address_space *vm = &ppgtt->base;
struct drm_i915_private *dev_priv = vm->i915;
enum vgt_g2v_type msg;
struct drm_i915_private *dev_priv = ppgtt->base.i915;
int i;
if (USES_FULL_48BIT_PPGTT(dev_priv)) {
u64 daddr = px_dma(&ppgtt->pml4);
if (use_4lvl(vm)) {
const u64 daddr = px_dma(&ppgtt->pml4);
I915_WRITE(vgtif_reg(pdp[0].lo), lower_32_bits(daddr));
I915_WRITE(vgtif_reg(pdp[0].hi), upper_32_bits(daddr));
@ -1009,7 +1017,7 @@ static int gen8_ppgtt_notify_vgt(struct i915_hw_ppgtt *ppgtt, bool create)
VGT_G2V_PPGTT_L4_PAGE_TABLE_DESTROY);
} else {
for (i = 0; i < GEN8_LEGACY_PDPES; i++) {
u64 daddr = i915_page_dir_dma_addr(ppgtt, i);
const u64 daddr = i915_page_dir_dma_addr(ppgtt, i);
I915_WRITE(vgtif_reg(pdp[i].lo), lower_32_bits(daddr));
I915_WRITE(vgtif_reg(pdp[i].hi), upper_32_bits(daddr));
@ -1026,7 +1034,7 @@ static int gen8_ppgtt_notify_vgt(struct i915_hw_ppgtt *ppgtt, bool create)
static void gen8_free_scratch(struct i915_address_space *vm)
{
if (USES_FULL_48BIT_PPGTT(vm->i915))
if (use_4lvl(vm))
free_pdp(vm, vm->scratch_pdp);
free_pd(vm, vm->scratch_pd);
free_pt(vm, vm->scratch_pt);
@ -1072,10 +1080,10 @@ static void gen8_ppgtt_cleanup(struct i915_address_space *vm)
if (intel_vgpu_active(dev_priv))
gen8_ppgtt_notify_vgt(ppgtt, false);
if (!USES_FULL_48BIT_PPGTT(vm->i915))
gen8_ppgtt_cleanup_3lvl(&ppgtt->base, &ppgtt->pdp);
else
if (use_4lvl(vm))
gen8_ppgtt_cleanup_4lvl(ppgtt);
else
gen8_ppgtt_cleanup_3lvl(&ppgtt->base, &ppgtt->pdp);
gen8_free_scratch(vm);
}
@ -1258,9 +1266,7 @@ static void gen8_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m)
gen8_pte_encode(vm->scratch_page.daddr, I915_CACHE_LLC);
u64 start = 0, length = ppgtt->base.total;
if (!USES_FULL_48BIT_PPGTT(vm->i915)) {
gen8_dump_pdp(ppgtt, &ppgtt->pdp, start, length, scratch_pte, m);
} else {
if (use_4lvl(vm)) {
u64 pml4e;
struct i915_pml4 *pml4 = &ppgtt->pml4;
struct i915_page_directory_pointer *pdp;
@ -1272,6 +1278,8 @@ static void gen8_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m)
seq_printf(m, " PML4E #%llu\n", pml4e);
gen8_dump_pdp(ppgtt, pdp, start, length, scratch_pte, m);
}
} else {
gen8_dump_pdp(ppgtt, &ppgtt->pdp, start, length, scratch_pte, m);
}
}
@ -1316,12 +1324,19 @@ static int gen8_preallocate_top_level_pdp(struct i915_hw_ppgtt *ppgtt)
*/
static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
{
struct drm_i915_private *dev_priv = ppgtt->base.i915;
struct i915_address_space *vm = &ppgtt->base;
struct drm_i915_private *dev_priv = vm->i915;
int ret;
ppgtt->base.total = USES_FULL_48BIT_PPGTT(dev_priv) ?
1ULL << 48 :
1ULL << 32;
ret = gen8_init_scratch(&ppgtt->base);
if (ret)
if (ret) {
ppgtt->base.total = 0;
return ret;
}
ppgtt->base.cleanup = gen8_ppgtt_cleanup;
ppgtt->base.unbind_vma = ppgtt_unbind_vma;
@ -1334,14 +1349,13 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
if (IS_CHERRYVIEW(dev_priv) || IS_BROXTON(dev_priv))
ppgtt->base.pt_kmap_wc = true;
if (USES_FULL_48BIT_PPGTT(dev_priv)) {
if (use_4lvl(vm)) {
ret = setup_px(&ppgtt->base, &ppgtt->pml4);
if (ret)
goto free_scratch;
gen8_initialize_pml4(&ppgtt->base, &ppgtt->pml4);
ppgtt->base.total = 1ULL << 48;
ppgtt->switch_mm = gen8_48b_mm_switch;
ppgtt->base.allocate_va_range = gen8_ppgtt_alloc_4lvl;
@ -1352,7 +1366,6 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
if (ret)
goto free_scratch;
ppgtt->base.total = 1ULL << 32;
ppgtt->switch_mm = gen8_legacy_mm_switch;
if (intel_vgpu_active(dev_priv)) {