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gpu: nvgpu: support resetting each GR instance

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Add a new header file <nvgpu/gr/gr_instances.h> that supports below
macros to execute various functions for GR instances

1) nvgpu_gr_exec_for_each_instance
   Execute a function for each GR instance by configuring GR remap
   window for that instance. Function being executed returns void.

2) nvgpu_gr_exec_with_ret_for_each_instance
   Execute a function for each GR instance by configuring GR remap
   window for that instance. Function being executed returns an error.

3) nvgpu_gr_exec_for_all_instances
   Execute a function for all GR instances at once. For this GR remap
   window needs to be disabled temporarily.

If CONFIG_NVGPU_MIG is disabled, all above macros will turn into simple
funciton calls.
If CONFIG_NVGPU_MIG is disabled or if runtime flag  NVGPU_SUPPORT_MIG is
disabled, all above macros will turn into simple function calls that
configure single GR instance.

Separate out GR engine reset code into new API gr_reset_engine() and
execute it with nvgpu_gr_exec_with_ret_for_each_instance().

PROD values need to be loaded in legacy mode, hence call
nvgpu_cg_init_gr_load_gating_prod() inside
nvgpu_gr_exec_for_all_instances().

Rename gr_init_prepare_hw() to more appropriate
gr_reset_hw_and_load_prod()

Moe gops.gr.init.fifo_access() call to gr_init_reset_enable_hw().

Add new API nvgpu_grmgr_get_gr_syspipe_id() to query GR instance syspipe
id from common.grmgr unit. Add nvgpu_gr_get_syspipe_id() that returns
same value stored in nvgpu_gr struct.

Add cur_gr_instance field to struct nvgpu_gr to track current GR
instance being programmed under remap window.

Jira NVGPU-5648

Change-Id: I86920303427a6e6547ebf195daa37438365bb38e
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2403550
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Deepak Nibade
2020-08-25 15:29:57 +05:30
committed by Alex Waterman
parent 34c24873a7
commit 6745b0685e
12 changed files with 210 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
userspace/units/ltc/nvgpu-ltc.c
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@@ -242,6 +242,16 @@ int test_ltc_init_support(struct unit_module *m,
return UNIT_SUCCESS;
}
static void nvgpu_init_gr_manager(struct gk20a *g)
{
struct nvgpu_gpu_instance *gpu_instance = &g->mig.gpu_instance[0];
struct nvgpu_gr_syspipe *gr_syspipe = &gpu_instance->gr_syspipe;
g->mig.num_gpu_instances = 1;
gr_syspipe->gr_instance_id = 0U;
gr_syspipe->gr_syspipe_id = 0U;
}
int test_ltc_ecc_init_free(struct unit_module *m, struct gk20a *g, void *args)
{
int ret = UNIT_SUCCESS;
@@ -261,6 +271,8 @@ int test_ltc_ecc_init_free(struct unit_module *m, struct gk20a *g, void *args)
unit_return_fail(m, "netlist init failed\n");
}
nvgpu_init_gr_manager(g);
err = nvgpu_gr_alloc(g);
if (err != 0) {
unit_return_fail(m, "failed to init gr\n");