drm/i915: add constants to size fence arrays and fields
In preparation of to support 32 fences on Ivybdrigde.
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Keith Packard <keithp@keithp.com>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 06a37f4..d2da91f 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -126,6 +126,9 @@
struct _drm_i915_sarea *sarea_priv;
};
#define I915_FENCE_REG_NONE -1
+#define I915_MAX_NUM_FENCES 16
+/* 16 fences + sign bit for FENCE_REG_NONE */
+#define I915_MAX_NUM_FENCE_BITS 5
struct drm_i915_fence_reg {
struct list_head lru_list;
@@ -168,7 +171,7 @@
u32 instdone1;
u32 seqno;
u64 bbaddr;
- u64 fence[16];
+ u64 fence[I915_MAX_NUM_FENCES];
struct timeval time;
struct drm_i915_error_object {
int page_count;
@@ -182,7 +185,7 @@
u32 gtt_offset;
u32 read_domains;
u32 write_domain;
- s32 fence_reg:5;
+ s32 fence_reg:I915_MAX_NUM_FENCE_BITS;
s32 pinned:2;
u32 tiling:2;
u32 dirty:1;
@@ -375,7 +378,7 @@
struct notifier_block lid_notifier;
int crt_ddc_pin;
- struct drm_i915_fence_reg fence_regs[16]; /* assume 965 */
+ struct drm_i915_fence_reg fence_regs[I915_MAX_NUM_FENCES]; /* assume 965 */
int fence_reg_start; /* 4 if userland hasn't ioctl'd us yet */
int num_fence_regs; /* 8 on pre-965, 16 otherwise */
@@ -506,7 +509,7 @@
u8 saveAR[21];
u8 saveDACMASK;
u8 saveCR[37];
- uint64_t saveFENCE[16];
+ uint64_t saveFENCE[I915_MAX_NUM_FENCES];
u32 saveCURACNTR;
u32 saveCURAPOS;
u32 saveCURABASE;
@@ -777,10 +780,8 @@
* Fence register bits (if any) for this object. Will be set
* as needed when mapped into the GTT.
* Protected by dev->struct_mutex.
- *
- * Size: 4 bits for 16 fences + sign (for FENCE_REG_NONE)
*/
- signed int fence_reg:5;
+ signed int fence_reg:I915_MAX_NUM_FENCE_BITS;
/**
* Advice: are the backing pages purgeable?