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gpu: nvgpu: Add doxygen documentation in pbdma.h

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Add doxygen documentations in pbdma.h and also take
care of setting pbdma_id to invalid value in case of
failure in nvgpu_pbdma_find_for_runlist.

Jira NVGPU-3591

Change-Id: I7aa7d55442cc7585c08fd6a54411cb22bc06ba30
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2131913
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Thomas Fleury
2019-06-06 15:47:40 -07:00
committed by mobile promotions
parent 1deb1fa176
commit fcc66f9b90
2 changed files with 39 additions and 2 deletions
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4
drivers/gpu/nvgpu/common/fifo/pbdma.c
View File

@@ -29,10 +29,10 @@ bool nvgpu_pbdma_find_for_runlist(struct gk20a *g,
struct nvgpu_fifo *f = &g->fifo;
bool found_pbdma_for_runlist = false;
u32 runlist_bit;
u32 id;
u32 id = U32_MAX;
runlist_bit = BIT32(runlist_id);
for (id = 0; id < f->num_pbdma; id++) {
for (id = 0U; id < f->num_pbdma; id++) {
if ((f->pbdma_map[id] & runlist_bit) != 0U) {
nvgpu_log_info(g, "gr info: pbdma_map[%d]=%d",
id, f->pbdma_map[id]);

37
drivers/gpu/nvgpu/include/nvgpu/pbdma.h
View File

@@ -23,10 +23,47 @@
#ifndef NVGPU_PBDMA_COMMON_H
#define NVGPU_PBDMA_COMMON_H
/**
* @file
*
* Push-Buffer DMA
*
* PBDMA unit fetches pushbuffer data from memory, generates
* commands, called "methods", from the fetched data, executes some of the
* generated methods itself, and sends the remainder of the methods to engines.
*/
struct gk20a;
/**
* nvgpu_pbdma_setup_sw - initialize PBDMA software context
*
* @param g Current GPU
*
* Gets number of PBDMAs and builds a map of runlists that will be serviced
* by those PBDMAs. Returns non-zero value in case of failure.
*/
int nvgpu_pbdma_setup_sw(struct gk20a *g);
/**
* nvgpu_pbdma_cleanup_sw - clean up PBDMA software context
*
* @param g Current GPU
*
* Cleans up PBDMA software context and related resources.
*/
void nvgpu_pbdma_cleanup_sw(struct gk20a *g);
/**
* nvgpu_pbdma_find_for_runlist - find PBDMA servicing the runlist
*
* @param g Current GPU
* @param runlist_id Runlist identifier
* @param pbdma_id Pointer to PBDMA identifier
*
* Finds the PBDMA which is servicing #runlist_id.
* Sets #pbdma_id to valid value and returns true in case PBDMA could be found.
* Sets #pbdma_id to U32_MAX and returns false in case PBDMA could not be found.
*/
bool nvgpu_pbdma_find_for_runlist(struct gk20a *g,
u32 runlist_id, u32 *pbdma_id);