i965: Move hardware limits to brw_device_info.

Since each kind of device has its own brw_device_info structure, we can
simply store the URB and thread limits there.  This eliminates all the
large if-ladders, and simplifies the context initialization code quite a
bit.

Signed-off-by: Kenneth Graunke <[email protected]>

3 files changed, 117 insertions, 83 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 7319114f054..41df547ce82 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -444,91 +444,19 @@ brwCreateContext(gl_api api,
       brw->CMD_PIPELINE_SELECT = CMD_PIPELINE_SELECT_965;
    }
 
-   /* WM maximum threads is number of EUs times number of threads per EU. */
-   assert(brw->gen <= 7);
-
-   if (brw->is_haswell) {
-      if (brw->gt == 1) {
-	 brw->max_wm_threads = 102;
-	 brw->max_vs_threads = 70;
-	 brw->max_gs_threads = 70;
-	 brw->urb.size = 128;
-         brw->urb.min_vs_entries = 32;
-	 brw->urb.max_vs_entries = 640;
-	 brw->urb.max_gs_entries = 256;
-      } else if (brw->gt == 2) {
-	 brw->max_wm_threads = 204;
-	 brw->max_vs_threads = 280;
-	 brw->max_gs_threads = 256;
-	 brw->urb.size = 256;
-         brw->urb.min_vs_entries = 64;
-	 brw->urb.max_vs_entries = 1664;
-	 brw->urb.max_gs_entries = 640;
-      } else if (brw->gt == 3) {
-	 brw->max_wm_threads = 408;
-	 brw->max_vs_threads = 280;
-	 brw->max_gs_threads = 256;
-	 brw->urb.size = 512;
-         brw->urb.min_vs_entries = 64;
-	 brw->urb.max_vs_entries = 1664;
-	 brw->urb.max_gs_entries = 640;
-      }
-   } else if (brw->gen == 7) {
-      if (brw->gt == 1) {
-	 brw->max_wm_threads = 48;
-	 brw->max_vs_threads = 36;
-	 brw->max_gs_threads = 36;
-	 brw->urb.size = 128;
-         brw->urb.min_vs_entries = 32;
-	 brw->urb.max_vs_entries = 512;
-	 brw->urb.max_gs_entries = 192;
-      } else if (brw->gt == 2) {
-	 brw->max_wm_threads = 172;
-	 brw->max_vs_threads = 128;
-	 brw->max_gs_threads = 128;
-	 brw->urb.size = 256;
-         brw->urb.min_vs_entries = 32;
-	 brw->urb.max_vs_entries = 704;
-	 brw->urb.max_gs_entries = 320;
-      } else {
-	 assert(!"Unknown gen7 device.");
-      }
-   } else if (brw->gen == 6) {
-      if (brw->gt == 2) {
-	 brw->max_wm_threads = 80;
-	 brw->max_vs_threads = 60;
-	 brw->max_gs_threads = 60;
-	 brw->urb.size = 64;            /* volume 5c.5 section 5.1 */
-         brw->urb.min_vs_entries = 24;
-	 brw->urb.max_vs_entries = 256; /* volume 2a (see 3DSTATE_URB) */
-	 brw->urb.max_gs_entries = 256;
-      } else {
-	 brw->max_wm_threads = 40;
-	 brw->max_vs_threads = 24;
-	 brw->max_gs_threads = 21; /* conservative; 24 if rendering disabled */
-	 brw->urb.size = 32;            /* volume 5c.5 section 5.1 */
-         brw->urb.min_vs_entries = 24;
-	 brw->urb.max_vs_entries = 256; /* volume 2a (see 3DSTATE_URB) */
-	 brw->urb.max_gs_entries = 256;
-      }
+   brw->max_vs_threads = devinfo->max_vs_threads;
+   brw->max_gs_threads = devinfo->max_gs_threads;
+   brw->max_wm_threads = devinfo->max_wm_threads;
+   brw->urb.size = devinfo->urb.size;
+   brw->urb.min_vs_entries = devinfo->urb.min_vs_entries;
+   brw->urb.max_vs_entries = devinfo->urb.max_vs_entries;
+   brw->urb.max_gs_entries = devinfo->urb.max_gs_entries;
+
+   if (brw->gen == 6)
       brw->urb.gen6_gs_previously_active = false;
-   } else if (brw->gen == 5) {
-      brw->urb.size = 1024;
-      brw->max_vs_threads = 72;
-      brw->max_gs_threads = 32;
-      brw->max_wm_threads = 12 * 6;
-   } else if (brw->is_g4x) {
-      brw->urb.size = 384;
-      brw->max_vs_threads = 32;
-      brw->max_gs_threads = 2;
-      brw->max_wm_threads = 10 * 5;
-   } else if (brw->gen < 6) {
-      brw->urb.size = 256;
-      brw->max_vs_threads = 16;
-      brw->max_gs_threads = 2;
-      brw->max_wm_threads = 8 * 4;
+
+   if (brw->gen == 4 && !brw->is_g4x)
       brw->has_negative_rhw_bug = true;
-   }
 
    if (brw->gen <= 7) {
       brw->needs_unlit_centroid_workaround = true;
diff --git a/src/mesa/drivers/dri/i965/brw_device_info.c b/src/mesa/drivers/dri/i965/brw_device_info.c
index 3345d9cbe26..7dad8ba85e7 100644
--- a/src/mesa/drivers/dri/i965/brw_device_info.c
+++ b/src/mesa/drivers/dri/i965/brw_device_info.c
@@ -27,15 +27,33 @@
 
 static const struct brw_device_info brw_device_info_i965 = {
    .gen = 4,
+   .max_vs_threads = 16,
+   .max_gs_threads = 2,
+   .max_wm_threads = 8 * 4,
+   .urb = {
+      .size = 256,
+   },
 };
 
 static const struct brw_device_info brw_device_info_g4x = {
    .gen = 4,
    .is_g4x = true,
+   .max_vs_threads = 32,
+   .max_gs_threads = 2,
+   .max_wm_threads = 10 * 5,
+   .urb = {
+      .size = 384,
+   },
 };
 
 static const struct brw_device_info brw_device_info_ilk = {
    .gen = 5,
+   .max_vs_threads = 72,
+   .max_gs_threads = 32,
+   .max_wm_threads = 12 * 6,
+   .urb = {
+      .size = 1024,
+   },
 };
 
 static const struct brw_device_info brw_device_info_snb_gt1 = {
@@ -43,6 +61,15 @@ static const struct brw_device_info brw_device_info_snb_gt1 = {
    .gt = 2,
    .has_hiz_and_separate_stencil = true,
    .has_llc = true,
+   .max_vs_threads = 24,
+   .max_gs_threads = 21, /* conservative; 24 if rendering disabled. */
+   .max_wm_threads = 40,
+   .urb = {
+      .size = 32,
+      .min_vs_entries = 24,
+      .max_vs_entries = 256,
+      .max_gs_entries = 256,
+   },
 };
 
 static const struct brw_device_info brw_device_info_snb_gt2 = {
@@ -50,6 +77,15 @@ static const struct brw_device_info brw_device_info_snb_gt2 = {
    .gt = 2,
    .has_hiz_and_separate_stencil = true,
    .has_llc = true,
+   .max_vs_threads = 60,
+   .max_gs_threads = 60,
+   .max_wm_threads = 80,
+   .urb = {
+      .size = 64,
+      .min_vs_entries = 24,
+      .max_vs_entries = 256,
+      .max_gs_entries = 256,
+   },
 };
 
 #define GEN7_FEATURES                               \
@@ -60,27 +96,81 @@ static const struct brw_device_info brw_device_info_snb_gt2 = {
 
 static const struct brw_device_info brw_device_info_ivb_gt1 = {
    GEN7_FEATURES, .is_ivybridge = true, .gt = 1,
+   .max_vs_threads = 36,
+   .max_gs_threads = 36,
+   .max_wm_threads = 48,
+   .urb = {
+      .size = 128,
+      .min_vs_entries = 32,
+      .max_vs_entries = 512,
+      .max_gs_entries = 192,
+   },
 };
 
 static const struct brw_device_info brw_device_info_ivb_gt2 = {
    GEN7_FEATURES, .is_ivybridge = true, .gt = 2,
+   .max_vs_threads = 128,
+   .max_gs_threads = 128,
+   .max_wm_threads = 172,
+   .urb = {
+      .size = 256,
+      .min_vs_entries = 32,
+      .max_vs_entries = 704,
+      .max_gs_entries = 320,
+   },
 };
 
 static const struct brw_device_info brw_device_info_byt = {
    GEN7_FEATURES, .is_baytrail = true, .gt = 1,
    .has_llc = false,
+   .max_vs_threads = 36,
+   .max_gs_threads = 36,
+   .max_wm_threads = 48,
+   .urb = {
+      .size = 128,
+      .min_vs_entries = 32,
+      .max_vs_entries = 512,
+      .max_gs_entries = 192,
+   },
 };
 
 static const struct brw_device_info brw_device_info_hsw_gt1 = {
    GEN7_FEATURES, .is_haswell = true, .gt = 1,
+   .max_vs_threads = 70,
+   .max_gs_threads = 70,
+   .max_wm_threads = 102,
+   .urb = {
+      .size = 128,
+      .min_vs_entries = 32,
+      .max_vs_entries = 640,
+      .max_gs_entries = 256,
+   },
 };
 
 static const struct brw_device_info brw_device_info_hsw_gt2 = {
    GEN7_FEATURES, .is_haswell = true, .gt = 2,
+   .max_vs_threads = 280,
+   .max_gs_threads = 256,
+   .max_wm_threads = 204,
+   .urb = {
+      .size = 256,
+      .min_vs_entries = 64,
+      .max_vs_entries = 1664,
+      .max_gs_entries = 640,
+   },
 };
 
 static const struct brw_device_info brw_device_info_hsw_gt3 = {
    GEN7_FEATURES, .is_haswell = true, .gt = 3,
+   .max_vs_threads = 280,
+   .max_gs_threads = 256,
+   .max_wm_threads = 408,
+   .urb = {
+      .size = 512,
+      .min_vs_entries = 64,
+      .max_vs_entries = 1664,
+      .max_gs_entries = 640,
+   },
 };
 
 const struct brw_device_info *
diff --git a/src/mesa/drivers/dri/i965/brw_device_info.h b/src/mesa/drivers/dri/i965/brw_device_info.h
index 9c2fecba8a3..0f4c282e336 100644
--- a/src/mesa/drivers/dri/i965/brw_device_info.h
+++ b/src/mesa/drivers/dri/i965/brw_device_info.h
@@ -39,6 +39,22 @@ struct brw_device_info
    bool must_use_separate_stencil;
 
    bool has_llc;
+
+   /**
+    * GPU Limits:
+    *  @{
+    */
+   unsigned max_vs_threads;
+   unsigned max_gs_threads;
+   unsigned max_wm_threads;
+
+   struct {
+      unsigned size;
+      unsigned min_vs_entries;
+      unsigned max_vs_entries;
+      unsigned max_gs_entries;
+   } urb;
+   /** @} */
 };
 
 const struct brw_device_info *brw_get_device_info(int devid);