[Mesa-dev] [PATCH mesa 2/3] tgsi: Add support for global / local / input MEMORY

Ilia Mirkin imirkin at alum.mit.edu
Thu Mar 10 15:28:19 UTC 2016


On Thu, Mar 10, 2016 at 10:14 AM, Hans de Goede <hdegoede at redhat.com> wrote:
> Extend the MEMORY file support to differentiate between global, local
> and shared memory, as well as "input" memory.
>
> "MEMORY[x], INPUT" is intended to access OpenCL kernel parameters, a
> special memory type is added for this, since the actual storage of these
> (e.g. UBO-s) may differ per implementation. The uploading of kernel
> parameters is handled by launch_grid, "MEMORY[x], INPUT" allows drivers
> to use an access mechanism for parameter reads which matches with the
> upload method.
>
> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> ---
>  src/gallium/auxiliary/tgsi/tgsi_build.c            |  8 +++----
>  src/gallium/auxiliary/tgsi/tgsi_dump.c             |  9 ++++++--
>  src/gallium/auxiliary/tgsi/tgsi_text.c             | 14 ++++++++++--
>  src/gallium/auxiliary/tgsi/tgsi_ureg.c             | 25 ++++++++++++----------
>  src/gallium/auxiliary/tgsi/tgsi_ureg.h             |  2 +-
>  .../drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp  |  7 +++---
>  src/gallium/include/pipe/p_shader_tokens.h         | 10 +++++++--
>  src/mesa/state_tracker/st_glsl_to_tgsi.cpp         |  2 +-
>  8 files changed, 51 insertions(+), 26 deletions(-)
>
> diff --git a/src/gallium/auxiliary/tgsi/tgsi_build.c b/src/gallium/auxiliary/tgsi/tgsi_build.c
> index c420ae1..b108ade 100644
> --- a/src/gallium/auxiliary/tgsi/tgsi_build.c
> +++ b/src/gallium/auxiliary/tgsi/tgsi_build.c
> @@ -111,7 +111,7 @@ tgsi_default_declaration( void )
>     declaration.Local = 0;
>     declaration.Array = 0;
>     declaration.Atomic = 0;
> -   declaration.Shared = 0;
> +   declaration.MemType = TGSI_MEMORY_TYPE_GLOBAL;
>     declaration.Padding = 0;
>
>     return declaration;
> @@ -128,7 +128,7 @@ tgsi_build_declaration(
>     unsigned local,
>     unsigned array,
>     unsigned atomic,
> -   unsigned shared,
> +   unsigned mem_type,
>     struct tgsi_header *header )
>  {
>     struct tgsi_declaration declaration;
> @@ -146,7 +146,7 @@ tgsi_build_declaration(
>     declaration.Local = local;
>     declaration.Array = array;
>     declaration.Atomic = atomic;
> -   declaration.Shared = shared;
> +   declaration.MemType = mem_type;
>     header_bodysize_grow( header );
>
>     return declaration;
> @@ -406,7 +406,7 @@ tgsi_build_full_declaration(
>        full_decl->Declaration.Local,
>        full_decl->Declaration.Array,
>        full_decl->Declaration.Atomic,
> -      full_decl->Declaration.Shared,
> +      full_decl->Declaration.MemType,
>        header );
>
>     if (maxsize <= size)
> diff --git a/src/gallium/auxiliary/tgsi/tgsi_dump.c b/src/gallium/auxiliary/tgsi/tgsi_dump.c
> index f232f38..273f0ae 100644
> --- a/src/gallium/auxiliary/tgsi/tgsi_dump.c
> +++ b/src/gallium/auxiliary/tgsi/tgsi_dump.c
> @@ -365,8 +365,13 @@ iter_declaration(
>     }
>
>     if (decl->Declaration.File == TGSI_FILE_MEMORY) {
> -      if (decl->Declaration.Shared)
> -         TXT(", SHARED");
> +      switch (decl->Declaration.MemType) {
> +      /* Note: ,GLOBAL is optional / the default */
> +      case TGSI_MEMORY_TYPE_GLOBAL: TXT(", GLOBAL"); break;
> +      case TGSI_MEMORY_TYPE_LOCAL:  TXT(", LOCAL");  break;
> +      case TGSI_MEMORY_TYPE_SHARED: TXT(", SHARED"); break;
> +      case TGSI_MEMORY_TYPE_INPUT:  TXT(", INPUT");  break;
> +      }
>     }
>
>     if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) {
> diff --git a/src/gallium/auxiliary/tgsi/tgsi_text.c b/src/gallium/auxiliary/tgsi/tgsi_text.c
> index 77598d2..9438e3b 100644
> --- a/src/gallium/auxiliary/tgsi/tgsi_text.c
> +++ b/src/gallium/auxiliary/tgsi/tgsi_text.c
> @@ -1390,8 +1390,18 @@ static boolean parse_declaration( struct translate_ctx *ctx )
>              ctx->cur = cur;
>           }
>        } else if (file == TGSI_FILE_MEMORY) {
> -         if (str_match_nocase_whole(&cur, "SHARED")) {
> -            decl.Declaration.Shared = 1;
> +         if (str_match_nocase_whole(&cur, "GLOBAL")) {
> +            /* Note this is a no-op global is the default */
> +            decl.Declaration.MemType = TGSI_MEMORY_TYPE_GLOBAL;
> +            ctx->cur = cur;
> +         } else if (str_match_nocase_whole(&cur, "LOCAL")) {
> +            decl.Declaration.MemType = TGSI_MEMORY_TYPE_LOCAL;
> +            ctx->cur = cur;
> +         } else if (str_match_nocase_whole(&cur, "SHARED")) {
> +            decl.Declaration.MemType = TGSI_MEMORY_TYPE_SHARED;
> +            ctx->cur = cur;
> +         } else if (str_match_nocase_whole(&cur, "INPUT")) {
> +            decl.Declaration.MemType = TGSI_MEMORY_TYPE_INPUT;
>              ctx->cur = cur;
>           }
>        } else {
> diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.c b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
> index e1a7278..9e10044 100644
> --- a/src/gallium/auxiliary/tgsi/tgsi_ureg.c
> +++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
> @@ -190,7 +190,7 @@ struct ureg_program
>
>     struct ureg_tokens domain[2];
>
> -   bool use_shared_memory;
> +   bool use_memory[TGSI_MEMORY_TYPE_COUNT];
>  };
>
>  static union tgsi_any_token error_tokens[32];
> @@ -729,13 +729,14 @@ struct ureg_src ureg_DECL_buffer(struct ureg_program *ureg, unsigned nr,
>     return reg;
>  }
>
> -/* Allocate a shared memory area.
> +/* Allocate a memory area.
>   */
> -struct ureg_src ureg_DECL_shared_memory(struct ureg_program *ureg)
> +struct ureg_src ureg_DECL_memory(struct ureg_program *ureg,
> +                                 unsigned memory_type)
>  {
> -   struct ureg_src reg = ureg_src_register(TGSI_FILE_MEMORY, 0);
> +   struct ureg_src reg = ureg_src_register(TGSI_FILE_MEMORY, memory_type);
>
> -   ureg->use_shared_memory = true;
> +   ureg->use_memory[memory_type] = true;
>     return reg;
>  }
>
> @@ -1666,7 +1667,7 @@ emit_decl_buffer(struct ureg_program *ureg,
>  }
>
>  static void
> -emit_decl_shared_memory(struct ureg_program *ureg)
> +emit_decl_memory(struct ureg_program *ureg, unsigned memory_type)
>  {
>     union tgsi_any_token *out = get_tokens(ureg, DOMAIN_DECL, 2);
>
> @@ -1675,11 +1676,11 @@ emit_decl_shared_memory(struct ureg_program *ureg)
>     out[0].decl.NrTokens = 2;
>     out[0].decl.File = TGSI_FILE_MEMORY;
>     out[0].decl.UsageMask = TGSI_WRITEMASK_XYZW;
> -   out[0].decl.Shared = true;
> +   out[0].decl.MemType = memory_type;
>
>     out[1].value = 0;
> -   out[1].decl_range.First = 0;
> -   out[1].decl_range.Last = 0;
> +   out[1].decl_range.First = memory_type;
> +   out[1].decl_range.Last = memory_type;
>  }
>
>  static void
> @@ -1854,8 +1855,10 @@ static void emit_decls( struct ureg_program *ureg )
>        emit_decl_buffer(ureg, ureg->buffer[i].index, ureg->buffer[i].atomic);
>     }
>
> -   if (ureg->use_shared_memory)
> -      emit_decl_shared_memory(ureg);
> +   for (i = 0; i < TGSI_MEMORY_TYPE_COUNT; i++) {
> +      if (ureg->use_memory[i])
> +         emit_decl_memory(ureg, i);
> +   }
>
>     if (ureg->const_decls.nr_constant_ranges) {
>        for (i = 0; i < ureg->const_decls.nr_constant_ranges; i++) {
> diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.h b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
> index 6a3b5dd..7c7a89e 100644
> --- a/src/gallium/auxiliary/tgsi/tgsi_ureg.h
> +++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
> @@ -338,7 +338,7 @@ struct ureg_src
>  ureg_DECL_buffer(struct ureg_program *ureg, unsigned nr, bool atomic);
>
>  struct ureg_src
> -ureg_DECL_shared_memory(struct ureg_program *ureg);
> +ureg_DECL_memory(struct ureg_program *ureg, unsigned memory_type);
>
>  static inline struct ureg_src
>  ureg_imm4f( struct ureg_program *ureg,
> diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
> index 8683722..a8258af 100644
> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
> @@ -860,7 +860,7 @@ public:
>     std::vector<Resource> resources;
>
>     struct MemoryFile {
> -      bool shared;
> +      uint8_t mem_type; // TGSI_MEMORY_TYPE_*
>     };
>     std::vector<MemoryFile> memoryFiles;
>
> @@ -1218,7 +1218,7 @@ bool Source::scanDeclaration(const struct tgsi_full_declaration *decl)
>        break;
>     case TGSI_FILE_MEMORY:
>        for (i = first; i <= last; ++i)
> -         memoryFiles[i].shared = decl->Declaration.Shared;
> +         memoryFiles[i].mem_type = decl->Declaration.MemType;
>        break;
>     case TGSI_FILE_NULL:
>     case TGSI_FILE_TEMPORARY:
> @@ -1523,7 +1523,8 @@ Converter::makeSym(uint tgsiFile, int fileIdx, int idx, int c, uint32_t address)
>
>     sym->reg.fileIndex = fileIdx;
>
> -   if (tgsiFile == TGSI_FILE_MEMORY && code->memoryFiles[fileIdx].shared)
> +   if (tgsiFile == TGSI_FILE_MEMORY &&
> +       code->memoryFiles[fileIdx].mem_type == TGSI_MEMORY_TYPE_SHARED)
>        sym->setFile(FILE_MEMORY_SHARED);
>
>     if (idx >= 0) {
> diff --git a/src/gallium/include/pipe/p_shader_tokens.h b/src/gallium/include/pipe/p_shader_tokens.h
> index 9d4a96a..0b8d7fb 100644
> --- a/src/gallium/include/pipe/p_shader_tokens.h
> +++ b/src/gallium/include/pipe/p_shader_tokens.h
> @@ -117,6 +117,12 @@ enum tgsi_file_type {
>  #define TGSI_CYLINDRICAL_WRAP_Z (1 << 2)
>  #define TGSI_CYLINDRICAL_WRAP_W (1 << 3)
>
> +#define TGSI_MEMORY_TYPE_GLOBAL        0 /* GLSL global / OpenCL global    */
> +#define TGSI_MEMORY_TYPE_LOCAL         1 /* GLSL local  / OpenCL private   */
> +#define TGSI_MEMORY_TYPE_SHARED        2 /* GLSL shared / OpenCL local     */
> +#define TGSI_MEMORY_TYPE_INPUT         3 /* For OpenCL kernel input params */

I'm moderately sure that only GLSL shared is a concept in GLSL. The
rest are OpenCL-only things. If you wanted to flip "local" to
"private", I wouldn't object.

With these comments touched up a bit, this patch is

Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>

> +#define TGSI_MEMORY_TYPE_COUNT         4
> +
>  struct tgsi_declaration
>  {
>     unsigned Type        : 4;  /**< TGSI_TOKEN_TYPE_DECLARATION */
> @@ -130,8 +136,8 @@ struct tgsi_declaration
>     unsigned Local       : 1;  /**< optimize as subroutine local variable? */
>     unsigned Array       : 1;  /**< extra array info? */
>     unsigned Atomic      : 1;  /**< atomic only? for TGSI_FILE_BUFFER */
> -   unsigned Shared      : 1;  /**< shared storage for TGSI_FILE_MEMORY */
> -   unsigned Padding     : 4;
> +   unsigned MemType     : 2;  /**< TGSI_MEMORY_TYPE_x for TGSI_FILE_MEMORY */
> +   unsigned Padding     : 3;
>  };
>
>  struct tgsi_declaration_range
> diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
> index 26e463e..9b8bf8e 100644
> --- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
> +++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
> @@ -6281,7 +6281,7 @@ st_translate_program(
>     }
>
>     if (program->use_shared_memory)
> -      t->shared_memory = ureg_DECL_shared_memory(ureg);
> +      t->shared_memory = ureg_DECL_memory(ureg, TGSI_MEMORY_TYPE_SHARED);
>
>     for (i = 0; i < program->shader->NumImages; i++) {
>        if (program->images_used & (1 << i)) {
> --
> 2.7.2
>


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