drm/i915/gtt: Make I915_PDPES_PER_PDP inline function

The macro takes a vm pointer at some sites, and dev_priv on others
We were saved as the internal macro never deferences the pointer
given.

As the number of pdpes depend on vm configuration, make it
as a inline function that accepts vm pointer.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wsilon.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1488295691-9404-1-git-send-email-mika.kuoppala@intel.com

drivers/gpu/drm/i915/i915_gem_gtt.c

@@ -528,7 +528,7 @@ static void gen8_initialize_pd(struct i915_address_space *vm,
 static int __pdp_init(struct i915_address_space *vm,
 		      struct i915_page_directory_pointer *pdp)
 {
-	const unsigned int pdpes = I915_PDPES_PER_PDP(vm->i915);
+	const unsigned int pdpes = i915_pdpes_per_pdp(vm);
 	unsigned int i;
 
 	pdp->page_directory = kmalloc_array(pdpes, sizeof(*pdp->page_directory),
@@ -852,7 +852,7 @@ gen8_ppgtt_insert_pte_entries(struct i915_hw_ppgtt *ppgtt,
 	gen8_pte_t *vaddr;
 	bool ret;
 
-	GEM_BUG_ON(idx->pdpe >= I915_PDPES_PER_PDP(vm));
+	GEM_BUG_ON(idx->pdpe >= i915_pdpes_per_pdp(&ppgtt->base));
 	pd = pdp->page_directory[idx->pdpe];
 	vaddr = kmap_atomic_px(pd->page_table[idx->pde]);
 	do {
@@ -883,7 +883,7 @@ gen8_ppgtt_insert_pte_entries(struct i915_hw_ppgtt *ppgtt,
 					break;
 				}
 
-				GEM_BUG_ON(idx->pdpe >= I915_PDPES_PER_PDP(vm));
+				GEM_BUG_ON(idx->pdpe >= i915_pdpes_per_pdp(&ppgtt->base));
 				pd = pdp->page_directory[idx->pdpe];
 			}
 
@@ -1036,9 +1036,10 @@ static void gen8_free_scratch(struct i915_address_space *vm)
 static void gen8_ppgtt_cleanup_3lvl(struct i915_address_space *vm,
 				    struct i915_page_directory_pointer *pdp)
 {
+	const unsigned int pdpes = i915_pdpes_per_pdp(vm);
 	int i;
 
-	for (i = 0; i < I915_PDPES_PER_PDP(vm->i915); i++) {
+	for (i = 0; i < pdpes; i++) {
 		if (pdp->page_directory[i] == vm->scratch_pd)
 			continue;
 
@@ -1127,7 +1128,7 @@ static int gen8_ppgtt_alloc_pdp(struct i915_address_space *vm,
 			gen8_initialize_pd(vm, pd);
 			gen8_ppgtt_set_pdpe(vm, pdp, pd, pdpe);
 			pdp->used_pdpes++;
-			GEM_BUG_ON(pdp->used_pdpes > I915_PDPES_PER_PDP(vm));
+			GEM_BUG_ON(pdp->used_pdpes > i915_pdpes_per_pdp(vm));
 
 			mark_tlbs_dirty(i915_vm_to_ppgtt(vm));
 		}
@@ -1201,6 +1202,7 @@ static void gen8_dump_pdp(struct i915_hw_ppgtt *ppgtt,
 			  gen8_pte_t scratch_pte,
 			  struct seq_file *m)
 {
+	struct i915_address_space *vm = &ppgtt->base;
 	struct i915_page_directory *pd;
 	u32 pdpe;
 

drivers/gpu/drm/i915/i915_gem_gtt.h

@@ -125,9 +125,6 @@ typedef u64 gen8_ppgtt_pml4e_t;
 #define GEN8_LEGACY_PDPES		4
 #define GEN8_PTES			I915_PTES(sizeof(gen8_pte_t))
 
-#define I915_PDPES_PER_PDP(dev_priv)	(USES_FULL_48BIT_PPGTT(dev_priv) ?\
-					GEN8_PML4ES_PER_PML4 : GEN8_LEGACY_PDPES)
-
 #define PPAT_UNCACHED_INDEX		(_PAGE_PWT | _PAGE_PCD)
 #define PPAT_CACHED_PDE_INDEX		0 /* WB LLC */
 #define PPAT_CACHED_INDEX		_PAGE_PAT /* WB LLCeLLC */
@@ -332,6 +329,12 @@ struct i915_address_space {
 
 #define i915_is_ggtt(V) (!(V)->file)
 
+static inline bool
+i915_vm_is_48bit(const struct i915_address_space *vm)
+{
+	return (vm->total - 1) >> 32;
+}
+
 /* The Graphics Translation Table is the way in which GEN hardware translates a
  * Graphics Virtual Address into a Physical Address. In addition to the normal
  * collateral associated with any va->pa translations GEN hardware also has a
@@ -457,6 +460,15 @@ static inline u32 gen6_pde_index(u32 addr)
 	return i915_pde_index(addr, GEN6_PDE_SHIFT);
 }
 
+static inline unsigned int
+i915_pdpes_per_pdp(const struct i915_address_space *vm)
+{
+	if (i915_vm_is_48bit(vm))
+		return GEN8_PML4ES_PER_PML4;
+
+	return GEN8_LEGACY_PDPES;
+}
+
 /* Equivalent to the gen6 version, For each pde iterates over every pde
  * between from start until start + length. On gen8+ it simply iterates
  * over every page directory entry in a page directory.
@@ -471,7 +483,7 @@ static inline u32 gen6_pde_index(u32 addr)
 
 #define gen8_for_each_pdpe(pd, pdp, start, length, iter)		\
 	for (iter = gen8_pdpe_index(start);				\
-	     length > 0 && iter < I915_PDPES_PER_PDP(dev) &&		\
+	     length > 0 && iter < i915_pdpes_per_pdp(vm) &&		\
 		(pd = (pdp)->page_directory[iter], true);		\
 	     ({ u64 temp = ALIGN(start+1, 1 << GEN8_PDPE_SHIFT);	\
 		    temp = min(temp - start, length);			\
@@ -523,12 +535,6 @@ i915_vm_to_ggtt(struct i915_address_space *vm)
 	return container_of(vm, struct i915_ggtt, base);
 }
 
-static inline bool
-i915_vm_is_48bit(const struct i915_address_space *vm)
-{
-	return (vm->total - 1) >> 32;
-}
-
 int i915_gem_init_aliasing_ppgtt(struct drm_i915_private *i915);
 void i915_gem_fini_aliasing_ppgtt(struct drm_i915_private *i915);