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Hans de Goede

2016-Apr-08 10:17 UTC

[Nouveau] [PATCH mesa v2 1/2] nouveau: codegen: Use FILE_MEMORY_BUFFER for buffers

Hi,

On 23-03-16 23:10, Samuel Pitoiset wrote:> Are you sure this won't break compute shaders on fermi?
> Could you please double-check that?
I just checked:

lspci:
01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT 610]
(rev a1)

Before this patch-set:

[hans at plank piglit]$ ./piglit run -o shader -t
'.*arb_shader_storage_buffer_object.*' results/shader
[9/9] pass: 9 /

After this patch-set:

[hans at plank piglit]$ ./piglit run -o shader -t
'.*arb_shader_storage_buffer_object.*' results/shader
[9/9] pass: 9 /
> One minor comment below.
>
> On 03/17/2016 05:07 PM, Hans de Goede wrote:
>> Some of the lowering steps we currently do for FILE_MEMORY_GLOBAL only
>> apply to buffers, making it impossible to use FILE_MEMORY_GLOBAL for
>> OpenCL global buffers.
>>
>> This commits changes the buffer code to use FILE_MEMORY_BUFFER at the
>> ir_from_tgsi and lowering steps, freeing use of FILE_MEMORY_GLOBAL
>> for use with OpenCL global buffers.
>>
>> Note that after lowering buffer accesses use the FILE_MEMORY_GLOBAL
>> register file.
>>
>> Tested with piglet on a gk107, before this patch:
>> ./piglit run -o shader -t
'.*arb_shader_storage_buffer_object.*' results/shader
>> [9/9] pass: 9 /
>> after:
>> ./piglit run -o shader -t
'.*arb_shader_storage_buffer_object.*' results/shader
>> [9/9] pass: 9 /
>>
>> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
>> ---
>> Changes in v2:
>> -New patch in v2 of patch-set to re-enable support for global opencl
buffers
>> ---
>>   src/gallium/drivers/nouveau/codegen/nv50_ir.h                 | 1 +
>>   src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp     | 2 +-
>>   src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp | 8
+++++---
>>   src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp         | 1 +
>>   src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp   | 5
++++-
>>   src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp   | 1 +
>>   6 files changed, 13 insertions(+), 5 deletions(-)
>>
>> diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir.h
b/src/gallium/drivers/nouveau/codegen/nv50_ir.h
>> index 7b0eb2f..5141fc6 100644
>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir.h
>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir.h
>> @@ -332,6 +332,7 @@ enum DataFile
>>      FILE_MEMORY_CONST,
>>      FILE_SHADER_INPUT,
>>      FILE_SHADER_OUTPUT,
>> +   FILE_MEMORY_BUFFER,
>>      FILE_MEMORY_GLOBAL,
>>      FILE_MEMORY_SHARED,
>>      FILE_MEMORY_LOCAL,
>> 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 baa2e30..7ae0cb2 100644
>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
>> @@ -373,7 +373,7 @@ static nv50_ir::DataFile translateFile(uint file)
>>      case TGSI_FILE_PREDICATE:       return nv50_ir::FILE_PREDICATE;
>>      case TGSI_FILE_IMMEDIATE:       return nv50_ir::FILE_IMMEDIATE;
>>      case TGSI_FILE_SYSTEM_VALUE:    return nv50_ir::FILE_SYSTEM_VALUE;
>> -   case TGSI_FILE_BUFFER:          return nv50_ir::FILE_MEMORY_GLOBAL;
>> +   case TGSI_FILE_BUFFER:          return nv50_ir::FILE_MEMORY_BUFFER;
>>      case TGSI_FILE_MEMORY:          return
nv50_ir::FILE_MEMORY_GLOBAL;
>>      case TGSI_FILE_SAMPLER:
>>      case TGSI_FILE_NULL:
>> diff --git
a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
>> index d0936d8..628deb7 100644
>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
>> @@ -1141,13 +1141,14 @@ NVC0LoweringPass::handleATOM(Instruction *atom)
>>         handleSharedATOM(atom);
>>         return true;
>>      default:
>> -      assert(atom->src(0).getFile() == FILE_MEMORY_GLOBAL);
>> +      assert(atom->src(0).getFile() == FILE_MEMORY_BUFFER);
>>         base = loadResInfo64(ind, atom->getSrc(0)->reg.fileIndex
* 16);
>>         assert(base->reg.size == 8);
>>         if (ptr)
>>            base = bld.mkOp2v(OP_ADD, TYPE_U64, base, base, ptr);
>>         assert(base->reg.size == 8);
>>         atom->setIndirect(0, 0, base);
>> +      atom->getSrc(0)->reg.file = FILE_MEMORY_GLOBAL;
>>         return true;
>>      }
>>      base >> @@ -1963,7 +1964,7 @@
NVC0LoweringPass::visit(Instruction *i)
>>         } else if (i->src(0).getFile() == FILE_SHADER_OUTPUT) {
>>            assert(prog->getType() ==
Program::TYPE_TESSELLATION_CONTROL);
>>            i->op = OP_VFETCH;
>> -      } else if (i->src(0).getFile() == FILE_MEMORY_GLOBAL) {
>> +      } else if (i->src(0).getFile() == FILE_MEMORY_BUFFER) {
>>            Value *ind = i->getIndirect(0, 1);
>>            Value *ptr = loadResInfo64(ind,
i->getSrc(0)->reg.fileIndex * 16);
>>            // XXX come up with a way not to do this for EVERY little
access but
>> @@ -1978,6 +1979,7 @@ NVC0LoweringPass::visit(Instruction *i)
>>            }
>>            i->setIndirect(0, 1, NULL);
>>            i->setIndirect(0, 0, ptr);
>> +         i->getSrc(0)->reg.file = FILE_MEMORY_GLOBAL;
>>            bld.mkCmp(OP_SET, CC_GT, TYPE_U32, pred, TYPE_U32, offset,
length);
>>            i->setPredicate(CC_NOT_P, pred);
>>            if (i->defExists(0)) {
>> @@ -1987,7 +1989,7 @@ NVC0LoweringPass::visit(Instruction *i)
>>         break;
>>      case OP_ATOM:
>>      {
>> -      const bool cctl = i->src(0).getFile() == FILE_MEMORY_GLOBAL;
>> +      const bool cctl = i->src(0).getFile() == FILE_MEMORY_BUFFER;
>>         handleATOM(i);
>>         handleCasExch(i, cctl);
>>      }
>> diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp
b/src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp
>> index cfa85ec..870b36e 100644
>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp
>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp
>> @@ -455,6 +455,7 @@ int Symbol::print(char *buf, size_t size,
>>      case FILE_MEMORY_CONST:  c = 'c'; break;
>>      case FILE_SHADER_INPUT:  c = 'a'; break;
>>      case FILE_SHADER_OUTPUT: c = 'o'; break;
>> +   case FILE_MEMORY_BUFFER: c = 'b'; break; // Only used
before lowering
>
> Could you please show me the output of NV50_PROG_DEBUG=255 with a test
which uses this file type? I'm not sure if using b[] is better than g[]
actually.
NV50_PROG_DEBUG=255 bin/arb_shader_storage_buffer_object-rendering

...

MAIN:-1 ()
BB:0 (52 instructions) - df = { }
  -> BB:1 (tree)
   0: mov u32 %r1 0x00000000 (0)
   1: ld  u32 %r0 b[0x0] (0)
   2: presin f32 %r3 %r0 (0)
   3: cos f32 %r3 %r3 (0)
   4: mov u32 %r2 %r3 (0)
   ...

And after the first lowering step:

MAIN:-1 ()
BB:0 (77 instructions) - df = { }
  -> BB:1 (tree)
   0: mov u32 %r56 0x00000000 (0)
   1: ld  u64 %r57d c15[0x300] (0)
   2: mov u32 %r58 0x00000004 (0)
   3: ld  u32 %r59 c15[0x308] (0)
   4: set u8 %p60 gt u32 %r58 %r59 (0)
   5: mov u32 %r61 0x00000000 (0)
   6: not %p60 ld  u32 %r62 g[%r57d+0x0] (0)
   ...

Note how the 'b' printing is only used before the buffer access
is lowered to a global access, so this seems to be the right thing todo.

Regards,

Hans

>
>>      case FILE_MEMORY_GLOBAL: c = 'g'; break;
>>      case FILE_MEMORY_SHARED: c = 's'; break;
>>      case FILE_MEMORY_LOCAL:  c = 'l'; break;
>> diff --git
a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
>> index 2c4d7f5..2af1715 100644
>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
>> @@ -207,6 +207,7 @@ TargetNV50::getFileSize(DataFile file) const
>>      case FILE_MEMORY_CONST:  return 65536;
>>      case FILE_SHADER_INPUT:  return 0x200;
>>      case FILE_SHADER_OUTPUT: return 0x200;
>> +   case FILE_MEMORY_BUFFER: return 0xffffffff;
>>      case FILE_MEMORY_GLOBAL: return 0xffffffff;
>>      case FILE_MEMORY_SHARED: return 16 << 10;
>>      case FILE_MEMORY_LOCAL:  return 48 << 10;
>> @@ -406,7 +407,8 @@ TargetNV50::isAccessSupported(DataFile file,
DataType ty) const
>>      if (ty == TYPE_B96 || ty == TYPE_NONE)
>>         return false;
>>      if (typeSizeof(ty) > 4)
>> -      return (file == FILE_MEMORY_LOCAL) || (file ==
FILE_MEMORY_GLOBAL);
>> +      return (file == FILE_MEMORY_LOCAL) || (file ==
FILE_MEMORY_GLOBAL) ||
>> +             (file == FILE_MEMORY_BUFFER);
>>      return true;
>>   }
>>
>> @@ -509,6 +511,7 @@ int TargetNV50::getLatency(const Instruction *i)
const
>>         switch (i->src(0).getFile()) {
>>         case FILE_MEMORY_LOCAL:
>>         case FILE_MEMORY_GLOBAL:
>> +      case FILE_MEMORY_BUFFER:
>>            return 100; // really 400 to 800
>>         default:
>>            return 22;
>> diff --git
a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
>> index a03afa8..9e1e7bf 100644
>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
>> @@ -248,6 +248,7 @@ TargetNVC0::getFileSize(DataFile file) const
>>      case FILE_MEMORY_CONST:  return 65536;
>>      case FILE_SHADER_INPUT:  return 0x400;
>>      case FILE_SHADER_OUTPUT: return 0x400;
>> +   case FILE_MEMORY_BUFFER: return 0xffffffff;
>>      case FILE_MEMORY_GLOBAL: return 0xffffffff;
>>      case FILE_MEMORY_SHARED: return 16 << 10;
>>      case FILE_MEMORY_LOCAL:  return 48 << 10;
>>

Samuel Pitoiset

2016-Apr-08 16:14 UTC

head link

[Nouveau] [PATCH mesa v2 1/2] nouveau: codegen: Use FILE_MEMORY_BUFFER for buffers

On 04/08/2016 12:17 PM, Hans de Goede wrote:> Hi,
>
> On 23-03-16 23:10, Samuel Pitoiset wrote:
>> Are you sure this won't break compute shaders on fermi?
>> Could you please double-check that?
>
> I just checked:
>
> lspci:
> 01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT
> 610] (rev a1)
>
> Before this patch-set:
>
> [hans at plank piglit]$ ./piglit run -o shader -t
> '.*arb_shader_storage_buffer_object.*' results/shader
> [9/9] pass: 9 /
>
> After this patch-set:
>
> [hans at plank piglit]$ ./piglit run -o shader -t
> '.*arb_shader_storage_buffer_object.*' results/shader
> [9/9] pass: 9 /
And what about compute shaders? (ie. -t arb_compute_shader)
Sorry to ask you again but I just want to be sure it's fine. :-)
>
>> One minor comment below.
>>
>> On 03/17/2016 05:07 PM, Hans de Goede wrote:
>>> Some of the lowering steps we currently do for FILE_MEMORY_GLOBAL
only
>>> apply to buffers, making it impossible to use FILE_MEMORY_GLOBAL
for
>>> OpenCL global buffers.
>>>
>>> This commits changes the buffer code to use FILE_MEMORY_BUFFER at
the
>>> ir_from_tgsi and lowering steps, freeing use of FILE_MEMORY_GLOBAL
>>> for use with OpenCL global buffers.
>>>
>>> Note that after lowering buffer accesses use the FILE_MEMORY_GLOBAL
>>> register file.
>>>
>>> Tested with piglet on a gk107, before this patch:
>>> ./piglit run -o shader -t
'.*arb_shader_storage_buffer_object.*'
>>> results/shader
>>> [9/9] pass: 9 /
>>> after:
>>> ./piglit run -o shader -t
'.*arb_shader_storage_buffer_object.*'
>>> results/shader
>>> [9/9] pass: 9 /
>>>
>>> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
>>> ---
>>> Changes in v2:
>>> -New patch in v2 of patch-set to re-enable support for global
opencl
>>> buffers
>>> ---
>>>   src/gallium/drivers/nouveau/codegen/nv50_ir.h                 | 1
+
>>>   src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp     | 2
+-
>>>   src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp | 8
>>> +++++---
>>>   src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp         | 1
+
>>>   src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp   | 5
>>> ++++-
>>>   src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp   | 1
+
>>>   6 files changed, 13 insertions(+), 5 deletions(-)
>>>
>>> diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir.h
>>> b/src/gallium/drivers/nouveau/codegen/nv50_ir.h
>>> index 7b0eb2f..5141fc6 100644
>>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir.h
>>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir.h
>>> @@ -332,6 +332,7 @@ enum DataFile
>>>      FILE_MEMORY_CONST,
>>>      FILE_SHADER_INPUT,
>>>      FILE_SHADER_OUTPUT,
>>> +   FILE_MEMORY_BUFFER,
>>>      FILE_MEMORY_GLOBAL,
>>>      FILE_MEMORY_SHARED,
>>>      FILE_MEMORY_LOCAL,
>>> 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 baa2e30..7ae0cb2 100644
>>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
>>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
>>> @@ -373,7 +373,7 @@ static nv50_ir::DataFile translateFile(uint
file)
>>>      case TGSI_FILE_PREDICATE:       return
nv50_ir::FILE_PREDICATE;
>>>      case TGSI_FILE_IMMEDIATE:       return
nv50_ir::FILE_IMMEDIATE;
>>>      case TGSI_FILE_SYSTEM_VALUE:    return
nv50_ir::FILE_SYSTEM_VALUE;
>>> -   case TGSI_FILE_BUFFER:          return
nv50_ir::FILE_MEMORY_GLOBAL;
>>> +   case TGSI_FILE_BUFFER:          return
nv50_ir::FILE_MEMORY_BUFFER;
>>>      case TGSI_FILE_MEMORY:          return
nv50_ir::FILE_MEMORY_GLOBAL;
>>>      case TGSI_FILE_SAMPLER:
>>>      case TGSI_FILE_NULL:
>>> diff --git
>>> a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
>>> b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
>>> index d0936d8..628deb7 100644
>>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
>>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
>>> @@ -1141,13 +1141,14 @@ NVC0LoweringPass::handleATOM(Instruction
*atom)
>>>         handleSharedATOM(atom);
>>>         return true;
>>>      default:
>>> -      assert(atom->src(0).getFile() == FILE_MEMORY_GLOBAL);
>>> +      assert(atom->src(0).getFile() == FILE_MEMORY_BUFFER);
>>>         base = loadResInfo64(ind,
atom->getSrc(0)->reg.fileIndex * 16);
>>>         assert(base->reg.size == 8);
>>>         if (ptr)
>>>            base = bld.mkOp2v(OP_ADD, TYPE_U64, base, base, ptr);
>>>         assert(base->reg.size == 8);
>>>         atom->setIndirect(0, 0, base);
>>> +      atom->getSrc(0)->reg.file = FILE_MEMORY_GLOBAL;
>>>         return true;
>>>      }
>>>      base >>> @@ -1963,7 +1964,7 @@
NVC0LoweringPass::visit(Instruction *i)
>>>         } else if (i->src(0).getFile() == FILE_SHADER_OUTPUT) {
>>>            assert(prog->getType() =>>>
Program::TYPE_TESSELLATION_CONTROL);
>>>            i->op = OP_VFETCH;
>>> -      } else if (i->src(0).getFile() == FILE_MEMORY_GLOBAL) {
>>> +      } else if (i->src(0).getFile() == FILE_MEMORY_BUFFER) {
>>>            Value *ind = i->getIndirect(0, 1);
>>>            Value *ptr = loadResInfo64(ind,
>>> i->getSrc(0)->reg.fileIndex * 16);
>>>            // XXX come up with a way not to do this for EVERY
little
>>> access but
>>> @@ -1978,6 +1979,7 @@ NVC0LoweringPass::visit(Instruction *i)
>>>            }
>>>            i->setIndirect(0, 1, NULL);
>>>            i->setIndirect(0, 0, ptr);
>>> +         i->getSrc(0)->reg.file = FILE_MEMORY_GLOBAL;
>>>            bld.mkCmp(OP_SET, CC_GT, TYPE_U32, pred, TYPE_U32,
offset,
>>> length);
>>>            i->setPredicate(CC_NOT_P, pred);
>>>            if (i->defExists(0)) {
>>> @@ -1987,7 +1989,7 @@ NVC0LoweringPass::visit(Instruction *i)
>>>         break;
>>>      case OP_ATOM:
>>>      {
>>> -      const bool cctl = i->src(0).getFile() ==
FILE_MEMORY_GLOBAL;
>>> +      const bool cctl = i->src(0).getFile() ==
FILE_MEMORY_BUFFER;
>>>         handleATOM(i);
>>>         handleCasExch(i, cctl);
>>>      }
>>> diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp
>>> b/src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp
>>> index cfa85ec..870b36e 100644
>>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp
>>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp
>>> @@ -455,6 +455,7 @@ int Symbol::print(char *buf, size_t size,
>>>      case FILE_MEMORY_CONST:  c = 'c'; break;
>>>      case FILE_SHADER_INPUT:  c = 'a'; break;
>>>      case FILE_SHADER_OUTPUT: c = 'o'; break;
>>> +   case FILE_MEMORY_BUFFER: c = 'b'; break; // Only used
before
>>> lowering
>>
>> Could you please show me the output of NV50_PROG_DEBUG=255 with a test
>> which uses this file type? I'm not sure if using b[] is better than
>> g[] actually.
>
> NV50_PROG_DEBUG=255 bin/arb_shader_storage_buffer_object-rendering
>
> ...
>
> MAIN:-1 ()
> BB:0 (52 instructions) - df = { }
>   -> BB:1 (tree)
>    0: mov u32 %r1 0x00000000 (0)
>    1: ld  u32 %r0 b[0x0] (0)
>    2: presin f32 %r3 %r0 (0)
>    3: cos f32 %r3 %r3 (0)
>    4: mov u32 %r2 %r3 (0)
>    ...
>
> And after the first lowering step:
>
> MAIN:-1 ()
> BB:0 (77 instructions) - df = { }
>   -> BB:1 (tree)
>    0: mov u32 %r56 0x00000000 (0)
>    1: ld  u64 %r57d c15[0x300] (0)
>    2: mov u32 %r58 0x00000004 (0)
>    3: ld  u32 %r59 c15[0x308] (0)
>    4: set u8 %p60 gt u32 %r58 %r59 (0)
>    5: mov u32 %r61 0x00000000 (0)
>    6: not %p60 ld  u32 %r62 g[%r57d+0x0] (0)
>    ...
>
> Note how the 'b' printing is only used before the buffer access
> is lowered to a global access, so this seems to be the right thing todo.
>
Fine by me.
Thanks.
> Regards,
>
> Hans
>
>
>>
>>>      case FILE_MEMORY_GLOBAL: c = 'g'; break;
>>>      case FILE_MEMORY_SHARED: c = 's'; break;
>>>      case FILE_MEMORY_LOCAL:  c = 'l'; break;
>>> diff --git
>>> a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
>>> b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
>>> index 2c4d7f5..2af1715 100644
>>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
>>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
>>> @@ -207,6 +207,7 @@ TargetNV50::getFileSize(DataFile file) const
>>>      case FILE_MEMORY_CONST:  return 65536;
>>>      case FILE_SHADER_INPUT:  return 0x200;
>>>      case FILE_SHADER_OUTPUT: return 0x200;
>>> +   case FILE_MEMORY_BUFFER: return 0xffffffff;
>>>      case FILE_MEMORY_GLOBAL: return 0xffffffff;
>>>      case FILE_MEMORY_SHARED: return 16 << 10;
>>>      case FILE_MEMORY_LOCAL:  return 48 << 10;
>>> @@ -406,7 +407,8 @@ TargetNV50::isAccessSupported(DataFile file,
>>> DataType ty) const
>>>      if (ty == TYPE_B96 || ty == TYPE_NONE)
>>>         return false;
>>>      if (typeSizeof(ty) > 4)
>>> -      return (file == FILE_MEMORY_LOCAL) || (file =>>>
FILE_MEMORY_GLOBAL);
>>> +      return (file == FILE_MEMORY_LOCAL) || (file =>>>
FILE_MEMORY_GLOBAL) ||
>>> +             (file == FILE_MEMORY_BUFFER);
>>>      return true;
>>>   }
>>>
>>> @@ -509,6 +511,7 @@ int TargetNV50::getLatency(const Instruction
*i)
>>> const
>>>         switch (i->src(0).getFile()) {
>>>         case FILE_MEMORY_LOCAL:
>>>         case FILE_MEMORY_GLOBAL:
>>> +      case FILE_MEMORY_BUFFER:
>>>            return 100; // really 400 to 800
>>>         default:
>>>            return 22;
>>> diff --git
>>> a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
>>> b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
>>> index a03afa8..9e1e7bf 100644
>>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
>>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
>>> @@ -248,6 +248,7 @@ TargetNVC0::getFileSize(DataFile file) const
>>>      case FILE_MEMORY_CONST:  return 65536;
>>>      case FILE_SHADER_INPUT:  return 0x400;
>>>      case FILE_SHADER_OUTPUT: return 0x400;
>>> +   case FILE_MEMORY_BUFFER: return 0xffffffff;
>>>      case FILE_MEMORY_GLOBAL: return 0xffffffff;
>>>      case FILE_MEMORY_SHARED: return 16 << 10;
>>>      case FILE_MEMORY_LOCAL:  return 48 << 10;
>>>

Hans de Goede

2016-Apr-12 10:04 UTC

head link

[Nouveau] [PATCH mesa v2 1/2] nouveau: codegen: Use FILE_MEMORY_BUFFER for buffers

Hi,

On 08-04-16 18:14, Samuel Pitoiset wrote:>
>
> On 04/08/2016 12:17 PM, Hans de Goede wrote:
>> Hi,
>>
>> On 23-03-16 23:10, Samuel Pitoiset wrote:
>>> Are you sure this won't break compute shaders on fermi?
>>> Could you please double-check that?
>>
>> I just checked:
>>
>> lspci:
>> 01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT
>> 610] (rev a1)
>>
>> Before this patch-set:
>>
>> [hans at plank piglit]$ ./piglit run -o shader -t
>> '.*arb_shader_storage_buffer_object.*' results/shader
>> [9/9] pass: 9 /
>>
>> After this patch-set:
>>
>> [hans at plank piglit]$ ./piglit run -o shader -t
>> '.*arb_shader_storage_buffer_object.*' results/shader
>> [9/9] pass: 9 /
>
> And what about compute shaders? (ie. -t arb_compute_shader)
> Sorry to ask you again but I just want to be sure it's fine. :-)
Those tests don't run yet on mesa master on the GF119 card
I've:

[hans at plank piglit]$ ./piglit run -o shader -t
'.*arb_compute_shader.*' results/shader
[20/20] skip: 20 |

My patches don't change anything about this, and they only touch
the buffer handling paths and the buffer tests (still) pass...

I've also tried on a:
01:00.0 VGA compatible controller: NVIDIA Corporation GK107 [GeForce GT 740]
(rev a1)

Same result.

Regards,

Hans


>
>>
>>> One minor comment below.
>>>
>>> On 03/17/2016 05:07 PM, Hans de Goede wrote:
>>>> Some of the lowering steps we currently do for
FILE_MEMORY_GLOBAL only
>>>> apply to buffers, making it impossible to use
FILE_MEMORY_GLOBAL for
>>>> OpenCL global buffers.
>>>>
>>>> This commits changes the buffer code to use FILE_MEMORY_BUFFER
at the
>>>> ir_from_tgsi and lowering steps, freeing use of
FILE_MEMORY_GLOBAL
>>>> for use with OpenCL global buffers.
>>>>
>>>> Note that after lowering buffer accesses use the
FILE_MEMORY_GLOBAL
>>>> register file.
>>>>
>>>> Tested with piglet on a gk107, before this patch:
>>>> ./piglit run -o shader -t
'.*arb_shader_storage_buffer_object.*'
>>>> results/shader
>>>> [9/9] pass: 9 /
>>>> after:
>>>> ./piglit run -o shader -t
'.*arb_shader_storage_buffer_object.*'
>>>> results/shader
>>>> [9/9] pass: 9 /
>>>>
>>>> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
>>>> ---
>>>> Changes in v2:
>>>> -New patch in v2 of patch-set to re-enable support for global
opencl
>>>> buffers
>>>> ---
>>>>   src/gallium/drivers/nouveau/codegen/nv50_ir.h                
| 1 +
>>>>   src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp    
| 2 +-
>>>>   src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
| 8
>>>> +++++---
>>>>   src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp        
| 1 +
>>>>   src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp  
| 5
>>>> ++++-
>>>>   src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp  
| 1 +
>>>>   6 files changed, 13 insertions(+), 5 deletions(-)
>>>>
>>>> diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir.h
>>>> b/src/gallium/drivers/nouveau/codegen/nv50_ir.h
>>>> index 7b0eb2f..5141fc6 100644
>>>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir.h
>>>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir.h
>>>> @@ -332,6 +332,7 @@ enum DataFile
>>>>      FILE_MEMORY_CONST,
>>>>      FILE_SHADER_INPUT,
>>>>      FILE_SHADER_OUTPUT,
>>>> +   FILE_MEMORY_BUFFER,
>>>>      FILE_MEMORY_GLOBAL,
>>>>      FILE_MEMORY_SHARED,
>>>>      FILE_MEMORY_LOCAL,
>>>> 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 baa2e30..7ae0cb2 100644
>>>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
>>>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
>>>> @@ -373,7 +373,7 @@ static nv50_ir::DataFile translateFile(uint
file)
>>>>      case TGSI_FILE_PREDICATE:       return
nv50_ir::FILE_PREDICATE;
>>>>      case TGSI_FILE_IMMEDIATE:       return
nv50_ir::FILE_IMMEDIATE;
>>>>      case TGSI_FILE_SYSTEM_VALUE:    return
nv50_ir::FILE_SYSTEM_VALUE;
>>>> -   case TGSI_FILE_BUFFER:          return
nv50_ir::FILE_MEMORY_GLOBAL;
>>>> +   case TGSI_FILE_BUFFER:          return
nv50_ir::FILE_MEMORY_BUFFER;
>>>>      case TGSI_FILE_MEMORY:          return
nv50_ir::FILE_MEMORY_GLOBAL;
>>>>      case TGSI_FILE_SAMPLER:
>>>>      case TGSI_FILE_NULL:
>>>> diff --git
>>>> a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
>>>> b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
>>>> index d0936d8..628deb7 100644
>>>> ---
a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
>>>> +++
b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
>>>> @@ -1141,13 +1141,14 @@
NVC0LoweringPass::handleATOM(Instruction *atom)
>>>>         handleSharedATOM(atom);
>>>>         return true;
>>>>      default:
>>>> -      assert(atom->src(0).getFile() == FILE_MEMORY_GLOBAL);
>>>> +      assert(atom->src(0).getFile() == FILE_MEMORY_BUFFER);
>>>>         base = loadResInfo64(ind,
atom->getSrc(0)->reg.fileIndex * 16);
>>>>         assert(base->reg.size == 8);
>>>>         if (ptr)
>>>>            base = bld.mkOp2v(OP_ADD, TYPE_U64, base, base,
ptr);
>>>>         assert(base->reg.size == 8);
>>>>         atom->setIndirect(0, 0, base);
>>>> +      atom->getSrc(0)->reg.file = FILE_MEMORY_GLOBAL;
>>>>         return true;
>>>>      }
>>>>      base >>>> @@ -1963,7 +1964,7 @@
NVC0LoweringPass::visit(Instruction *i)
>>>>         } else if (i->src(0).getFile() ==
FILE_SHADER_OUTPUT) {
>>>>            assert(prog->getType() =>>>>
Program::TYPE_TESSELLATION_CONTROL);
>>>>            i->op = OP_VFETCH;
>>>> -      } else if (i->src(0).getFile() == FILE_MEMORY_GLOBAL)
{
>>>> +      } else if (i->src(0).getFile() == FILE_MEMORY_BUFFER)
{
>>>>            Value *ind = i->getIndirect(0, 1);
>>>>            Value *ptr = loadResInfo64(ind,
>>>> i->getSrc(0)->reg.fileIndex * 16);
>>>>            // XXX come up with a way not to do this for EVERY
little
>>>> access but
>>>> @@ -1978,6 +1979,7 @@ NVC0LoweringPass::visit(Instruction *i)
>>>>            }
>>>>            i->setIndirect(0, 1, NULL);
>>>>            i->setIndirect(0, 0, ptr);
>>>> +         i->getSrc(0)->reg.file = FILE_MEMORY_GLOBAL;
>>>>            bld.mkCmp(OP_SET, CC_GT, TYPE_U32, pred, TYPE_U32,
offset,
>>>> length);
>>>>            i->setPredicate(CC_NOT_P, pred);
>>>>            if (i->defExists(0)) {
>>>> @@ -1987,7 +1989,7 @@ NVC0LoweringPass::visit(Instruction *i)
>>>>         break;
>>>>      case OP_ATOM:
>>>>      {
>>>> -      const bool cctl = i->src(0).getFile() ==
FILE_MEMORY_GLOBAL;
>>>> +      const bool cctl = i->src(0).getFile() ==
FILE_MEMORY_BUFFER;
>>>>         handleATOM(i);
>>>>         handleCasExch(i, cctl);
>>>>      }
>>>> diff --git
a/src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp
>>>> b/src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp
>>>> index cfa85ec..870b36e 100644
>>>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp
>>>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp
>>>> @@ -455,6 +455,7 @@ int Symbol::print(char *buf, size_t size,
>>>>      case FILE_MEMORY_CONST:  c = 'c'; break;
>>>>      case FILE_SHADER_INPUT:  c = 'a'; break;
>>>>      case FILE_SHADER_OUTPUT: c = 'o'; break;
>>>> +   case FILE_MEMORY_BUFFER: c = 'b'; break; // Only
used before
>>>> lowering
>>>
>>> Could you please show me the output of NV50_PROG_DEBUG=255 with a
test
>>> which uses this file type? I'm not sure if using b[] is better
than
>>> g[] actually.
>>
>> NV50_PROG_DEBUG=255 bin/arb_shader_storage_buffer_object-rendering
>>
>> ...
>>
>> MAIN:-1 ()
>> BB:0 (52 instructions) - df = { }
>>   -> BB:1 (tree)
>>    0: mov u32 %r1 0x00000000 (0)
>>    1: ld  u32 %r0 b[0x0] (0)
>>    2: presin f32 %r3 %r0 (0)
>>    3: cos f32 %r3 %r3 (0)
>>    4: mov u32 %r2 %r3 (0)
>>    ...
>>
>> And after the first lowering step:
>>
>> MAIN:-1 ()
>> BB:0 (77 instructions) - df = { }
>>   -> BB:1 (tree)
>>    0: mov u32 %r56 0x00000000 (0)
>>    1: ld  u64 %r57d c15[0x300] (0)
>>    2: mov u32 %r58 0x00000004 (0)
>>    3: ld  u32 %r59 c15[0x308] (0)
>>    4: set u8 %p60 gt u32 %r58 %r59 (0)
>>    5: mov u32 %r61 0x00000000 (0)
>>    6: not %p60 ld  u32 %r62 g[%r57d+0x0] (0)
>>    ...
>>
>> Note how the 'b' printing is only used before the buffer access
>> is lowered to a global access, so this seems to be the right thing
todo.
>>
>
> Fine by me.
> Thanks.
>
>> Regards,
>>
>> Hans
>>
>>
>>>
>>>>      case FILE_MEMORY_GLOBAL: c = 'g'; break;
>>>>      case FILE_MEMORY_SHARED: c = 's'; break;
>>>>      case FILE_MEMORY_LOCAL:  c = 'l'; break;
>>>> diff --git
>>>> a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
>>>> b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
>>>> index 2c4d7f5..2af1715 100644
>>>> ---
a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
>>>> +++
b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
>>>> @@ -207,6 +207,7 @@ TargetNV50::getFileSize(DataFile file)
const
>>>>      case FILE_MEMORY_CONST:  return 65536;
>>>>      case FILE_SHADER_INPUT:  return 0x200;
>>>>      case FILE_SHADER_OUTPUT: return 0x200;
>>>> +   case FILE_MEMORY_BUFFER: return 0xffffffff;
>>>>      case FILE_MEMORY_GLOBAL: return 0xffffffff;
>>>>      case FILE_MEMORY_SHARED: return 16 << 10;
>>>>      case FILE_MEMORY_LOCAL:  return 48 << 10;
>>>> @@ -406,7 +407,8 @@ TargetNV50::isAccessSupported(DataFile
file,
>>>> DataType ty) const
>>>>      if (ty == TYPE_B96 || ty == TYPE_NONE)
>>>>         return false;
>>>>      if (typeSizeof(ty) > 4)
>>>> -      return (file == FILE_MEMORY_LOCAL) || (file
=>>>> FILE_MEMORY_GLOBAL);
>>>> +      return (file == FILE_MEMORY_LOCAL) || (file
=>>>> FILE_MEMORY_GLOBAL) ||
>>>> +             (file == FILE_MEMORY_BUFFER);
>>>>      return true;
>>>>   }
>>>>
>>>> @@ -509,6 +511,7 @@ int TargetNV50::getLatency(const
Instruction *i)
>>>> const
>>>>         switch (i->src(0).getFile()) {
>>>>         case FILE_MEMORY_LOCAL:
>>>>         case FILE_MEMORY_GLOBAL:
>>>> +      case FILE_MEMORY_BUFFER:
>>>>            return 100; // really 400 to 800
>>>>         default:
>>>>            return 22;
>>>> diff --git
>>>> a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
>>>> b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
>>>> index a03afa8..9e1e7bf 100644
>>>> ---
a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
>>>> +++
b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
>>>> @@ -248,6 +248,7 @@ TargetNVC0::getFileSize(DataFile file)
const
>>>>      case FILE_MEMORY_CONST:  return 65536;
>>>>      case FILE_SHADER_INPUT:  return 0x400;
>>>>      case FILE_SHADER_OUTPUT: return 0x400;
>>>> +   case FILE_MEMORY_BUFFER: return 0xffffffff;
>>>>      case FILE_MEMORY_GLOBAL: return 0xffffffff;
>>>>      case FILE_MEMORY_SHARED: return 16 << 10;
>>>>      case FILE_MEMORY_LOCAL:  return 48 << 10;
>>>>

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