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gpu: nvgpu: allocate struct nvgpu_gr based on enumerated gr count

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Add new API nvgpu_grmgr_get_num_gr_instances() that returns number of
GR instance enumerated by GR manager. This just returns number of sys
pipes enabled since it is same as number of GR instances.

For consistency until common.gr supports multiple GR instances
completely, add a temporary macro NVGPU_GR_NUM_INSTANCES and set it
to 1. If this macro is changed to 0 (for local MIG testing), fall
back to use nvgpu_grmgr_get_num_gr_instances() to get enumerated number
of GR instances.

Use a for loop to initialize other variables of struct nvgpu_gr.

Remove unnecessary NULL check in nvgpu_gr_alloc() since struct gk20a
pointer can never be NULL in this path. Also remove corresponding unit
test code.

Jira NVGPU-5648

Change-Id: Id151d634a23235381229044f2a9af89e390886f2
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2400151
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Deepak Nibade
2020-08-17 18:06:19 +05:30
committed by Alex Waterman
parent 625d6520b8
commit cfa360f5b8
7 changed files with 43 additions and 18 deletions
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6
userspace/units/gr/init/nvgpu-gr-init.c
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@@ -273,12 +273,6 @@ static int test_gr_alloc_errors(struct gk20a *g)
nvgpu_kmem_get_fault_injection();
struct nvgpu_gr *local_gr = g->gr;
/*Set g to NULL */
err = nvgpu_gr_alloc(NULL);
if (err == 0) {
return UNIT_FAIL;
}
/* Free NULL gr */
g->gr = NULL;
nvgpu_gr_free(g);