On 5/22/2015 6:05 PM, Mika Kuoppala wrote:
As there is flushing involved when we have done the cpu
write, make functions for mapping for cpu space. Make macros
to map any type of paging structure.
v2: Make it clear tha flushing kunmap is only for ppgtt (Ville)
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 73 +++++++++++++++++++------------------
1 file changed, 38 insertions(+), 35 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index d020b5e..072295f 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -330,19 +330,35 @@ static void cleanup_page_dma(struct drm_device *dev, struct i915_page_dma *p)
memset(p, 0, sizeof(*p));
}
+static void *kmap_page_dma(struct i915_page_dma *p)
+{
+ return kmap_atomic(p->page);
+}
+
+/* We use the flushing unmap only with ppgtt structures:
+ * page directories, page tables and scratch pages.
+ */
+static void kunmap_page_dma(struct drm_device *dev, void *vaddr)
+{
+ if (!HAS_LLC(dev) && !IS_VALLEYVIEW(dev))
+ drm_clflush_virt_range(vaddr, PAGE_SIZE);
Same comment as in the previous patch (at least IS_CHERRYVIEW, until we
have more insights in bxt).
+
+ kunmap_atomic(vaddr);
+}
+
+#define kmap_px(px) kmap_page_dma(&(px)->base)
+#define kunmap_px(ppgtt, vaddr) kunmap_page_dma((ppgtt)->base.dev, (vaddr));
+
static void fill_page_dma(struct drm_device *dev, struct i915_page_dma *p,
const uint64_t val)
{
int i;
- uint64_t * const vaddr = kmap_atomic(p->page);
+ uint64_t * const vaddr = kmap_page_dma(p);
for (i = 0; i < 512; i++)
vaddr[i] = val;
- if (!HAS_LLC(dev) && !IS_VALLEYVIEW(dev))
- drm_clflush_virt_range(vaddr, PAGE_SIZE);
-
- kunmap_atomic(vaddr);
+ kunmap_page_dma(dev, vaddr);
}
static void fill_page_dma_32(struct drm_device *dev, struct i915_page_dma *p,
@@ -500,7 +516,6 @@ static void gen8_ppgtt_clear_range(struct i915_address_space *vm,
while (num_entries) {
struct i915_page_directory *pd;
struct i915_page_table *pt;
- struct page *page_table;
if (WARN_ON(!ppgtt->pdp.page_directory[pdpe]))
continue;
@@ -515,22 +530,18 @@ static void gen8_ppgtt_clear_range(struct i915_address_space *vm,
if (WARN_ON(!pt->base.page))
continue;
- page_table = pt->base.page;
-
last_pte = pte + num_entries;
if (last_pte > GEN8_PTES)
last_pte = GEN8_PTES;
- pt_vaddr = kmap_atomic(page_table);
+ pt_vaddr = kmap_px(pt);
for (i = pte; i < last_pte; i++) {
pt_vaddr[i] = scratch_pte;
num_entries--;
}
- if (!HAS_LLC(ppgtt->base.dev))
- drm_clflush_virt_range(pt_vaddr, PAGE_SIZE);
- kunmap_atomic(pt_vaddr);
+ kunmap_px(ppgtt, pt);
pte = 0;
if (++pde == I915_PDES) {
@@ -562,18 +573,14 @@ static void gen8_ppgtt_insert_entries(struct i915_address_space *vm,
if (pt_vaddr == NULL) {
struct i915_page_directory *pd = ppgtt->pdp.page_directory[pdpe];
struct i915_page_table *pt = pd->page_table[pde];
- struct page *page_table = pt->base.page;
-
- pt_vaddr = kmap_atomic(page_table);
+ pt_vaddr = kmap_px(pt);
}
pt_vaddr[pte] =
gen8_pte_encode(sg_page_iter_dma_address(&sg_iter),
cache_level, true);
if (++pte == GEN8_PTES) {
- if (!HAS_LLC(ppgtt->base.dev))
- drm_clflush_virt_range(pt_vaddr, PAGE_SIZE);
- kunmap_atomic(pt_vaddr);
+ kunmap_px(ppgtt, pt_vaddr);
pt_vaddr = NULL;
if (++pde == I915_PDES) {
pdpe++;
@@ -582,11 +589,9 @@ static void gen8_ppgtt_insert_entries(struct i915_address_space *vm,
pte = 0;
}
}
- if (pt_vaddr) {
- if (!HAS_LLC(ppgtt->base.dev))
- drm_clflush_virt_range(pt_vaddr, PAGE_SIZE);
- kunmap_atomic(pt_vaddr);
- }
+
+ if (pt_vaddr)
+ kunmap_px(ppgtt, pt_vaddr);
}
static void __gen8_do_map_pt(gen8_pde_t * const pde,
@@ -865,7 +870,7 @@ static int gen8_alloc_va_range(struct i915_address_space *vm,
/* Allocations have completed successfully, so set the bitmaps, and do
* the mappings. */
gen8_for_each_pdpe(pd, &ppgtt->pdp, start, length, temp, pdpe) {
- gen8_pde_t *const page_directory = kmap_atomic(pd->base.page);
+ gen8_pde_t *const page_directory = kmap_px(pd);
struct i915_page_table *pt;
uint64_t pd_len = gen8_clamp_pd(start, length);
uint64_t pd_start = start;
@@ -895,10 +900,7 @@ static int gen8_alloc_va_range(struct i915_address_space *vm,
* point we're still relying on insert_entries() */
}
- if (!HAS_LLC(vm->dev))
- drm_clflush_virt_range(page_directory, PAGE_SIZE);
-
- kunmap_atomic(page_directory);
+ kunmap_px(ppgtt, page_directory);
set_bit(pdpe, ppgtt->pdp.used_pdpes);
}
@@ -1030,7 +1032,8 @@ static void gen6_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m)
expected);
seq_printf(m, "\tPDE: %x\n", pd_entry);
- pt_vaddr = kmap_atomic(ppgtt->pd.page_table[pde]->base.page);
+ pt_vaddr = kmap_px(ppgtt->pd.page_table[pde]);
+
for (pte = 0; pte < GEN6_PTES; pte+=4) {
unsigned long va =
(pde * PAGE_SIZE * GEN6_PTES) +
@@ -1052,7 +1055,7 @@ static void gen6_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m)
}
seq_puts(m, "\n");
}
- kunmap_atomic(pt_vaddr);
+ kunmap_px(ppgtt, pt_vaddr);
}
}
@@ -1255,12 +1258,12 @@ static void gen6_ppgtt_clear_range(struct i915_address_space *vm,
if (last_pte > GEN6_PTES)
last_pte = GEN6_PTES;
- pt_vaddr = kmap_atomic(ppgtt->pd.page_table[act_pt]->base.page);
+ pt_vaddr = kmap_px(ppgtt->pd.page_table[act_pt]);
for (i = first_pte; i < last_pte; i++)
pt_vaddr[i] = scratch_pte;
- kunmap_atomic(pt_vaddr);
+ kunmap_px(ppgtt, pt_vaddr);
num_entries -= last_pte - first_pte;
first_pte = 0;
@@ -1284,21 +1287,21 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm,
pt_vaddr = NULL;
for_each_sg_page(pages->sgl, &sg_iter, pages->nents, 0) {
if (pt_vaddr == NULL)
- pt_vaddr = kmap_atomic(ppgtt->pd.page_table[act_pt]->base.page);
+ pt_vaddr = kmap_px(ppgtt->pd.page_table[act_pt]);
pt_vaddr[act_pte] =
vm->pte_encode(sg_page_iter_dma_address(&sg_iter),
cache_level, true, flags);
if (++act_pte == GEN6_PTES) {
- kunmap_atomic(pt_vaddr);
+ kunmap_px(ppgtt, pt_vaddr);
pt_vaddr = NULL;
act_pt++;
act_pte = 0;
}
}
if (pt_vaddr)
- kunmap_atomic(pt_vaddr);
+ kunmap_px(ppgtt, pt_vaddr);
}
static void gen6_initialize_pt(struct i915_address_space *vm,
--
1.9.1
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