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gpu: nvgpu: Begin removing variables in struct gk20a

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Begin removing all of the myriad flag variables in struct gk20a and
replace that with one API that checks for flags being enabled or
disabled. The API is as follows:

  bool nvgpu_is_enabled(struct gk20a *g, int flag);
  bool __nvgpu_set_enabled(struct gk20a *g, int flag, bool state);

These APIs allow many of the gk20a flags to be replaced by defines.
This makes flag usage consistent and saves a small amount of memory in
struct gk20a. Also it makes struct gk20a easier to read since there's
less clutter scattered through out.

JIRA NVGPU-84

Change-Id: I6525cecbe97c4e8379e5f53e29ef0b4dbd1a7fc2
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1488049
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Alex Waterman
2017-05-23 18:21:14 +01:00
committed by mobile promotions
parent b817e9e207
commit 66a2511a36
25 changed files with 194 additions and 45 deletions
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48
drivers/gpu/nvgpu/common/enabled.c Normal file
View File

@@ -0,0 +1,48 @@
/*
* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <nvgpu/enabled.h>
#include <nvgpu/bitops.h>
#include "gk20a/gk20a.h"
int nvgpu_init_enabled_flags(struct gk20a *g)
{
/*
* Zero all flags initially. Flags that should be set to non-zero states
* can be done so during driver init.
*/
g->enabled_flags = nvgpu_kzalloc(g,
BITS_TO_LONGS(NVGPU_MAX_ENABLED_BITS) *
sizeof(unsigned long));
if (!g->enabled_flags)
return -ENOMEM;
return 0;
}
bool nvgpu_is_enabled(struct gk20a *g, int flag)
{
return test_bit(flag, g->enabled_flags);
}
bool __nvgpu_set_enabled(struct gk20a *g, int flag, bool state)
{
if (state)
return test_and_set_bit(flag, g->enabled_flags);
else
return test_and_clear_bit(flag, g->enabled_flags);
}