gallium: Add PIPE_CAP_ENDIANNESS

Cc: mesa-stable@lists.freedesktop.org
[ Francisco Jerez: Fix "PIPE_ENDIAN_SMALL" in the documentation,
  define PIPE_ENDIAN_NATIVE. ]

src/gallium/docs/source/screen.rst

@@ -168,6 +168,8 @@ The integer capabilities:
   since they are linked) a driver can support. Returning 0 is equivalent
   to returning 1 because every driver has to support at least a single
   viewport/scissor combination.  
+* ''PIPE_CAP_ENDIANNESS``:: The endianness of the device.  Either
+  PIPE_ENDIAN_BIG or PIPE_ENDIAN_LITTLE.
 
 
 .. _pipe_capf:

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -227,6 +227,9 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_MAX_TEXEL_OFFSET:
 		return 7;
 
+	case PIPE_CAP_ENDIANNESS:
+		return PIPE_ENDIAN_LITTLE;
+
 	default:
 		DBG("unknown param %d", param);
 		return 0;

src/gallium/drivers/i915/i915_screen.c

@@ -263,6 +263,8 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
       return 0;
+   case PIPE_CAP_ENDIANNESS:
+      return PIPE_ENDIAN_LITTLE;
 
    default:
       debug_printf("%s: Unknown cap %u.\n", __FUNCTION__, cap);

src/gallium/drivers/ilo/ilo_screen.c

@@ -421,6 +421,8 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 1 << 27;
    case PIPE_CAP_MAX_VIEWPORTS:
       return ILO_MAX_VIEWPORTS;
+   case PIPE_CAP_ENDIANNESS:
+      return PIPE_ENDIAN_LITTLE;
 
    default:
       return 0;

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -231,6 +231,8 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 0;
    case PIPE_CAP_MAX_VIEWPORTS:
       return PIPE_MAX_VIEWPORTS;
+   case PIPE_CAP_ENDIANNESS:
+      return PIPE_ENDIAN_NATIVE;
    }
    /* should only get here on unhandled cases */
    debug_printf("Unexpected PIPE_CAP %d query\n", param);

src/gallium/drivers/nv30/nv30_screen.c

@@ -130,6 +130,8 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
       return 1;
+   case PIPE_CAP_ENDIANNESS:
+      return PIPE_ENDIAN_LITTLE;
    default:
       debug_printf("unknown param %d\n", param);
       return 0;

src/gallium/drivers/nv50/nv50_screen.c

@@ -189,6 +189,8 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       return 0;
    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
       return PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50;
+   case PIPE_CAP_ENDIANNESS:
+      return PIPE_ENDIAN_LITTLE;
    default:
       NOUVEAU_ERR("unknown PIPE_CAP %d\n", param);
       return 0;

src/gallium/drivers/nvc0/nvc0_screen.c

@@ -179,6 +179,8 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       return 1;
    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
       return PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50;
+   case PIPE_CAP_ENDIANNESS:
+      return PIPE_ENDIAN_LITTLE;
    default:
       NOUVEAU_ERR("unknown PIPE_CAP %d\n", param);
       return 0;

src/gallium/drivers/r300/r300_screen.c

@@ -190,6 +190,8 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
         /* Render targets. */
         case PIPE_CAP_MAX_RENDER_TARGETS:
             return 4;
+	case PIPE_CAP_ENDIANNESS:
+            return PIPE_ENDIAN_LITTLE;
     }
     return 0;
 }

src/gallium/drivers/r600/r600_pipe.c

@@ -679,6 +679,8 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 
 	case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 		return PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600;
+	case PIPE_CAP_ENDIANNESS:
+		return PIPE_ENDIAN_LITTLE;
 	}
 	return 0;
 }

src/gallium/drivers/radeonsi/radeonsi_pipe.c

@@ -440,6 +440,8 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 
 	case PIPE_CAP_MAX_TEXEL_OFFSET:
 		return 7;
+	case PIPE_CAP_ENDIANNESS:
+		return PIPE_ENDIAN_LITTLE;
 	}
 	return 0;
 }

src/gallium/drivers/softpipe/sp_screen.c

@@ -183,6 +183,8 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 0;
    case PIPE_CAP_MAX_VIEWPORTS:
       return 1;
+   case PIPE_CAP_ENDIANNESS:
+      return PIPE_ENDIAN_NATIVE;
    }
    /* should only get here on unhandled cases */
    debug_printf("Unexpected PIPE_CAP %d query\n", param);

src/gallium/drivers/svga/svga_screen.c

@@ -270,6 +270,8 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 1;
    case PIPE_CAP_MAX_VIEWPORTS:
       return 1;
+   case PIPE_CAP_ENDIANNESS:
+      return PIPE_ENDIAN_LITTLE;
    }
 
    debug_printf("Unexpected PIPE_CAP_ query %u\n", param);

src/gallium/include/pipe/p_defines.h

@@ -507,12 +507,22 @@ enum pipe_cap {
    PIPE_CAP_QUERY_PIPELINE_STATISTICS = 81,
    PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK = 82,
    PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE = 83,
-   PIPE_CAP_MAX_VIEWPORTS = 84
+   PIPE_CAP_MAX_VIEWPORTS = 84,
+   PIPE_CAP_ENDIANNESS = 85
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600 (1 << 1)
 
+enum pipe_endian {
+   PIPE_ENDIAN_LITTLE = 0,
+   PIPE_ENDIAN_BIG = 1,
+#if defined(PIPE_ARCH_LITTLE_ENDIAN)
+   PIPE_ENDIAN_NATIVE = PIPE_ENDIAN_LITTLE
+#elif defined(PIPE_ARCH_BIG_ENDIAN)
+   PIPE_ENDIAN_NATIVE = PIPE_ENDIAN_BIG
+#endif
+};
 
 /**
  * Implementation limits which are queried through