r300g: Debug flags infrastructure

So that debugging is no longer a full-spam-or-nothing approach, you are now
supposed to set the RADEON_DEBUG environment flag just like for classic Mesa.

The available debug flags are different, however. Just running an OpenGL
application with RADEON_DEBUG set to an arbitrary string will print out
helpful information.

Everything must be compiled with -DDEBUG for any of this to work

10 files changed, 152 insertions, 21 deletions

diff --git a/src/gallium/drivers/r300/Makefile b/src/gallium/drivers/r300/Makefile
index d7a2c8c462c..93c2152edce 100644
--- a/src/gallium/drivers/r300/Makefile
+++ b/src/gallium/drivers/r300/Makefile
@@ -9,6 +9,7 @@ C_SOURCES = \
 	r300_chipset.c \
 	r300_clear.c \
 	r300_context.c \
+	r300_debug.c \
 	r300_emit.c \
 	r300_flush.c \
 	r300_fs.c \
diff --git a/src/gallium/drivers/r300/r300_context.c b/src/gallium/drivers/r300/r300_context.c
index da67bc29b89..ef79d7bbbb6 100644
--- a/src/gallium/drivers/r300/r300_context.c
+++ b/src/gallium/drivers/r300/r300_context.c
@@ -146,6 +146,8 @@ struct pipe_context* r300_create_context(struct pipe_screen* screen,
     r300->context.winsys = (struct pipe_winsys*)r300_winsys;
     r300->context.screen = r300_screen(screen);
 
+    r300_init_debug(r300);
+
     r300->context.destroy = r300_destroy_context;
 
     r300->context.clear = r300_clear;
diff --git a/src/gallium/drivers/r300/r300_context.h b/src/gallium/drivers/r300/r300_context.h
index f78492d4aa9..cd7b36b4678 100644
--- a/src/gallium/drivers/r300/r300_context.h
+++ b/src/gallium/drivers/r300/r300_context.h
@@ -275,6 +275,9 @@ struct r300_context {
     uint32_t dirty_state;
     /* Flag indicating whether or not the HW is dirty. */
     uint32_t dirty_hw;
+
+    /** Combination of DBG_xxx flags */
+    unsigned debug;
 };
 
 /* Convenience cast wrapper. */
@@ -288,4 +291,40 @@ struct draw_stage* r300_draw_stage(struct r300_context* r300);
 void r300_init_state_functions(struct r300_context* r300);
 void r300_init_surface_functions(struct r300_context* r300);
 
+/* Debug functionality. */
+
+/**
+ * Debug flags to disable/enable certain groups of debugging outputs.
+ *
+ * \note These may be rather coarse, and the grouping may be impractical.
+ * If you find, while debugging the driver, that a different grouping
+ * of these flags would be beneficial, just feel free to change them
+ * but make sure to update the documentation in r300_debug.c to reflect
+ * those changes.
+ */
+/*@{*/
+#define DBG_HELP    0x0000001
+#define DBG_FP      0x0000002
+#define DBG_VP      0x0000004
+#define DBG_CS      0x0000008
+#define DBG_DRAW    0x0000010
+/*@}*/
+
+static INLINE boolean DBG_ON(struct r300_context * ctx, unsigned flags)
+{
+    return (ctx->debug & flags) ? true : false;
+}
+
+static INLINE void DBG(struct r300_context * ctx, unsigned flags, const char * fmt, ...)
+{
+    if (DBG_ON(ctx, flags)) {
+        va_list va;
+        va_start(va, fmt);
+        debug_vprintf(fmt, va);
+        va_end(va);
+    }
+}
+
+void r300_init_debug(struct r300_context * ctx);
+
 #endif /* R300_CONTEXT_H */
diff --git a/src/gallium/drivers/r300/r300_cs.h b/src/gallium/drivers/r300/r300_cs.h
index 71b142c0dbf..0a7e4703636 100644
--- a/src/gallium/drivers/r300/r300_cs.h
+++ b/src/gallium/drivers/r300/r300_cs.h
@@ -49,7 +49,8 @@
     (RADEON_CP_PACKET0 | ((count) << 16) | ((register) >> 2))
 
 #define CS_LOCALS(context) \
-    struct r300_winsys* cs_winsys = context->winsys; \
+    struct r300_context* const cs_context_copy = (context); \
+    struct r300_winsys* cs_winsys = cs_context_copy->winsys; \
     int cs_count = 0;
 
 #define CHECK_CS(size) \
@@ -58,7 +59,7 @@
 #define BEGIN_CS(size) do { \
     CHECK_CS(size); \
     if (VERY_VERBOSE_CS) { \
-        debug_printf("r300: BEGIN_CS, count %d, in %s (%s:%d)\n", \
+        DBG(cs_context_copy, DBG_CS, "r300: BEGIN_CS, count %d, in %s (%s:%d)\n", \
                 size, __FUNCTION__, __FILE__, __LINE__); \
     } \
     cs_winsys->begin_cs(cs_winsys, (size), \
@@ -78,7 +79,7 @@
 
 #define OUT_CS_REG(register, value) do { \
     if (VERY_VERBOSE_REGISTERS) \
-        debug_printf("r300: writing 0x%08X to register 0x%04X\n", \
+        DBG(cs_context_copy, DBG_CS, "r300: writing 0x%08X to register 0x%04X\n", \
             value, register); \
     assert(register); \
     OUT_CS(CP_PACKET0(register, 0)); \
@@ -89,14 +90,14 @@
  * not the actual packet0 count! */
 #define OUT_CS_REG_SEQ(register, count) do { \
     if (VERY_VERBOSE_REGISTERS) \
-        debug_printf("r300: writing register sequence of %d to 0x%04X\n", \
+        DBG(cs_context_copy, DBG_CS, "r300: writing register sequence of %d to 0x%04X\n", \
             count, register); \
     assert(register); \
     OUT_CS(CP_PACKET0(register, ((count) - 1))); \
 } while (0)
 
 #define OUT_CS_RELOC(bo, offset, rd, wd, flags) do { \
-    debug_printf("r300: writing relocation for buffer %p, offset %d, " \
+    DBG(cs_context_copy, DBG_CS, "r300: writing relocation for buffer %p, offset %d, " \
             "domains (%d, %d, %d)\n", \
         bo, offset, rd, wd, flags); \
     assert(bo); \
@@ -107,7 +108,7 @@
 
 #define END_CS do { \
     if (VERY_VERBOSE_CS) { \
-        debug_printf("r300: END_CS in %s (%s:%d)\n", __FUNCTION__, \
+        DBG(cs_context_copy, DBG_CS, "r300: END_CS in %s (%s:%d)\n", __FUNCTION__, \
                 __FILE__, __LINE__); \
     } \
     if (cs_count != 0) \
@@ -117,7 +118,7 @@
 
 #define FLUSH_CS do { \
     if (VERY_VERBOSE_CS) { \
-        debug_printf("r300: FLUSH_CS in %s (%s:%d)\n\n", __FUNCTION__, \
+        DBG(cs_context_copy, DBG_CS, "r300: FLUSH_CS in %s (%s:%d)\n\n", __FUNCTION__, \
                 __FILE__, __LINE__); \
     } \
     cs_winsys->flush_cs(cs_winsys); \
@@ -127,7 +128,7 @@
 
 #define OUT_CS_ONE_REG(register, count) do { \
     if (VERY_VERBOSE_REGISTERS) \
-        debug_printf("r300: writing data sequence of %d to 0x%04X\n", \
+        DBG(cs_context_copy, DBG_CS, "r300: writing data sequence of %d to 0x%04X\n", \
             count, register); \
     assert(register); \
     OUT_CS(CP_PACKET0(register, ((count) - 1)) | RADEON_ONE_REG_WR); \
@@ -141,7 +142,7 @@
 } while (0)
 
 #define OUT_CS_INDEX_RELOC(bo, offset, count, rd, wd, flags) do { \
-    debug_printf("r300: writing relocation for index buffer %p," \
+    DBG(cs_context_copy, DBG_CS, "r300: writing relocation for index buffer %p," \
             "offset %d\n", bo, offset); \
     assert(bo); \
     OUT_CS(offset); \
diff --git a/src/gallium/drivers/r300/r300_debug.c b/src/gallium/drivers/r300/r300_debug.c
new file mode 100644
index 00000000000..15308dda1de
--- /dev/null
+++ b/src/gallium/drivers/r300/r300_debug.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2009 Nicolai Haehnle <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE. */
+
+#include "r300_context.h"
+
+#include <ctype.h>
+
+
+struct debug_option {
+    const char * name;
+    unsigned flag;
+    const char * description;
+};
+
+static struct debug_option debug_options[] = {
+    { "help", DBG_HELP, "Helpful meta-information about the driver" },
+    { "fp", DBG_FP, "Fragment program handling" },
+    { "vp", DBG_VP, "Vertex program handling" },
+    { "cs", DBG_CS, "Command submissions" },
+    { "draw", DBG_DRAW, "Draw and emit" },
+
+    { "all", ~0, "Convenience option that enables all debug flags" },
+
+    /* must be last */
+    { 0, 0, 0 }
+};
+
+void r300_init_debug(struct r300_context * ctx)
+{
+    const char * options = debug_get_option("RADEON_DEBUG", 0);
+    boolean printhint = false;
+
+    if (options) {
+        while(*options) {
+            if (*options == ' ' || *options == ',') {
+                options++;
+                continue;
+            }
+
+            size_t length = strcspn(options, " ,");
+            struct debug_option * opt;
+
+            for(opt = debug_options; opt->name; ++opt) {
+                if (!strncmp(options, opt->name, length)) {
+                    ctx->debug |= opt->flag;
+                    break;
+                }
+            }
+
+            if (!opt->name) {
+                debug_printf("Unknown debug option: %s\n", options);
+                printhint = true;
+            }
+
+            options += length;
+        }
+
+        if (!ctx->debug)
+            printhint = true;
+    }
+
+    if (printhint || ctx->debug & DBG_HELP) {
+        debug_printf("You can enable debug output by setting the RADEON_DEBUG environment variable\n"
+                     "to a comma-separated list of debug options. Available options are:\n");
+        for(struct debug_option * opt = debug_options; opt->name; ++opt) {
+            debug_printf("    %s: %s\n", opt->name, opt->description);
+        }
+    }
+}
diff --git a/src/gallium/drivers/r300/r300_emit.c b/src/gallium/drivers/r300/r300_emit.c
index bd4d59e6f1a..f77df223267 100644
--- a/src/gallium/drivers/r300/r300_emit.c
+++ b/src/gallium/drivers/r300/r300_emit.c
@@ -490,7 +490,7 @@ void r300_emit_vertex_buffer(struct r300_context* r300)
 {
     CS_LOCALS(r300);
 
-    debug_printf("r300: Preparing vertex buffer %p for render, "
+    DBG(r300, DBG_DRAW, "r300: Preparing vertex buffer %p for render, "
             "vertex size %d\n", r300->vbo,
             r300->vertex_info.vinfo.size);
     /* Set the pointer to our vertex buffer. The emitted values are this:
diff --git a/src/gallium/drivers/r300/r300_fs.c b/src/gallium/drivers/r300/r300_fs.c
index 36463b9a2eb..a0e848a59ac 100644
--- a/src/gallium/drivers/r300/r300_fs.c
+++ b/src/gallium/drivers/r300/r300_fs.c
@@ -96,7 +96,7 @@ void r300_translate_fragment_shader(struct r300_context* r300,
 
     memset(&compiler, 0, sizeof(compiler));
     rc_init(&compiler.Base);
-    compiler.Base.Debug = 1;
+    compiler.Base.Debug = DBG_ON(r300, DBG_FP);
 
     compiler.code = &fs->code;
     compiler.is_r500 = r300_screen(r300->context.screen)->caps->is_r500;
diff --git a/src/gallium/drivers/r300/r300_render.c b/src/gallium/drivers/r300/r300_render.c
index aced4ab8877..df511abfd93 100644
--- a/src/gallium/drivers/r300/r300_render.c
+++ b/src/gallium/drivers/r300/r300_render.c
@@ -34,7 +34,7 @@
 struct r300_render {
     /* Parent class */
     struct vbuf_render base;
-    
+
     /* Pipe context */
     struct r300_context* r300;
 
@@ -77,7 +77,7 @@ static boolean r300_render_allocate_vertices(struct vbuf_render* render,
     if (r300render->vbo && (size > r300render->vbo_alloc_size)) {
         pipe_buffer_reference(&r300render->vbo, NULL);
     }
-    
+
     if (!r300render->vbo) {
         r300render->vbo = pipe_buffer_create(screen,
                                              64,
@@ -184,7 +184,7 @@ static void r300_render_draw_arrays(struct vbuf_render* render,
 
     prepare_render(r300render, count);
 
-    debug_printf("r300: Doing vbuf render, count %d\n", count);
+    DBG(r300, DBG_DRAW, "r300: Doing vbuf render, count %d\n", count);
 
     BEGIN_CS(2);
     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
diff --git a/src/gallium/drivers/r300/r300_state_derived.c b/src/gallium/drivers/r300/r300_state_derived.c
index c01e61a9b19..94e3ce085c3 100644
--- a/src/gallium/drivers/r300/r300_state_derived.c
+++ b/src/gallium/drivers/r300/r300_state_derived.c
@@ -195,13 +195,13 @@ static void r300_vertex_psc(struct r300_context* r300,
      * and not on attrib information. */
     if (r300screen->caps->has_tcl) {
         attrib_count = r300->vs->info.num_inputs;
-        debug_printf("r300: routing %d attribs in psc for vs\n",
+        DBG(r300, DBG_DRAW, "r300: routing %d attribs in psc for vs\n",
                 attrib_count);
     } else {
         attrib_count = vinfo->num_attribs;
-        debug_printf("r300: attrib count: %d\n", attrib_count);
+        DBG(r300, DBG_DRAW, "r300: attrib count: %d\n", attrib_count);
         for (i = 0; i < attrib_count; i++) {
-            debug_printf("r300: attrib: offset %d, interp %d, size %d,"
+            DBG(r300, DBG_DRAW, "r300: attrib: offset %d, interp %d, size %d,"
                    " tab %d\n", vinfo->attrib[i].src_index,
                    vinfo->attrib[i].interp_mode, vinfo->attrib[i].emit,
                    tab[i]);
@@ -299,18 +299,18 @@ static void r300_update_fs_tab(struct r300_context* r300)
     }
 
     /* Now that we know where everything is... */
-    debug_printf("r300: fp input count: %d\n", info->num_inputs);
+    DBG(r300, DBG_DRAW, "r300: fp input count: %d\n", info->num_inputs);
     for (i = 0; i < info->num_inputs; i++) {
         switch (tab[i]) {
             case INTERP_LINEAR:
-                debug_printf("r300: attrib: "
+                DBG(r300, DBG_DRAW, "r300: attrib: "
                         "stack offset %d, color,    tab %d\n",
                         i, cols_emitted);
                 tab[i] = cols_emitted;
                 cols_emitted++;
                 break;
             case INTERP_PERSPECTIVE:
-                debug_printf("r300: attrib: "
+                DBG(r300, DBG_DRAW, "r300: attrib: "
                         "stack offset %d, texcoord, tab %d\n",
                         i, cols + texs);
                 tab[i] = cols + texs;
diff --git a/src/gallium/drivers/r300/r300_vs.c b/src/gallium/drivers/r300/r300_vs.c
index 2cb903bba2f..12a6e37be62 100644
--- a/src/gallium/drivers/r300/r300_vs.c
+++ b/src/gallium/drivers/r300/r300_vs.c
@@ -116,7 +116,7 @@ void r300_translate_vertex_shader(struct r300_context* r300,
     /* Setup the compiler */
     rc_init(&compiler.Base);
 
-    compiler.Base.Debug = 1;
+    compiler.Base.Debug = DBG_ON(r300, DBG_VP);
     compiler.code = &vs->code;
     compiler.UserData = vs;