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gpu: nvgpu: Replace kref for refcounting in nvgpu

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- added wrapper struct nvgpu_ref over nvgpu_atomic_t
- added nvgpu_ref_* APIs to access the above struct

JIRA NVGPU-140

Change-Id: Id47f897995dd4721751f7610b6d4d4fbfe4d6b9a
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1540899
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
This commit is contained in:
Debarshi Dutta
2017-08-08 12:08:03 +05:30
committed by mobile promotions
parent 8662fae334
commit 3fa47b877d
25 changed files with 176 additions and 98 deletions
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23
drivers/gpu/nvgpu/common/linux/debug_fifo.c
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@@ -20,7 +20,7 @@
#include <nvgpu/sort.h>
void __gk20a_fifo_profile_free(struct kref *ref);
void __gk20a_fifo_profile_free(struct nvgpu_ref *ref);
static void *gk20a_fifo_sched_debugfs_seq_start(
struct seq_file *s, loff_t *pos)
@@ -145,14 +145,15 @@ static int gk20a_fifo_profile_enable(void *data, u64 val)
if (val == 0) {
if (f->profile.enabled) {
f->profile.enabled = false;
kref_put(&f->profile.ref, __gk20a_fifo_profile_free);
nvgpu_ref_put(&f->profile.ref,
__gk20a_fifo_profile_free);
}
} else {
if (!f->profile.enabled) {
/* not kref init as it can have a running condition if
* we enable/disable/enable while kickoff is happening
*/
if (!kref_get_unless_zero(&f->profile.ref)) {
if (!nvgpu_ref_get_unless_zero(&f->profile.ref)) {
f->profile.data = vzalloc(
FIFO_PROFILING_ENTRIES *
sizeof(struct fifo_profile_gk20a));
@@ -165,7 +166,7 @@ static int gk20a_fifo_profile_enable(void *data, u64 val)
nvgpu_mutex_release(&f->profile.lock);
return -ENOMEM;
}
kref_init(&f->profile.ref);
nvgpu_ref_init(&f->profile.ref);
}
atomic_set(&f->profile.get.atomic_var, 0);
f->profile.enabled = true;
@@ -241,7 +242,7 @@ static int gk20a_fifo_profile_stats(struct seq_file *s, void *unused)
u64 percentiles_append[PERCENTILE_RANGES];
u64 percentiles_userd[PERCENTILE_RANGES];
if (!kref_get_unless_zero(&g->fifo.profile.ref)) {
if (!nvgpu_ref_get_unless_zero(&g->fifo.profile.ref)) {
seq_printf(s, "Profiling disabled\n");
return 0;
}
@@ -271,7 +272,7 @@ static int gk20a_fifo_profile_stats(struct seq_file *s, void *unused)
percentiles_jobtracking[index],
percentiles_userd[index]);
kref_put(&g->fifo.profile.ref, __gk20a_fifo_profile_free);
nvgpu_ref_put(&g->fifo.profile.ref, __gk20a_fifo_profile_free);
return 0;
}
@@ -312,7 +313,7 @@ void gk20a_fifo_debugfs_init(struct gk20a *g)
nvgpu_mutex_init(&g->fifo.profile.lock);
g->fifo.profile.enabled = false;
atomic_set(&g->fifo.profile.get.atomic_var, 0);
atomic_set(&g->fifo.profile.ref.refcount, 0);
atomic_set(&g->fifo.profile.ref.refcount.atomic_var, 0);
debugfs_create_file("enable", 0600, profile_root, g,
&gk20a_fifo_profile_enable_debugfs_fops);
@@ -322,7 +323,7 @@ void gk20a_fifo_debugfs_init(struct gk20a *g)
}
void __gk20a_fifo_profile_free(struct kref *ref)
void __gk20a_fifo_profile_free(struct nvgpu_ref *ref)
{
struct fifo_gk20a *f = container_of(ref, struct fifo_gk20a,
profile.ref);
@@ -340,7 +341,7 @@ struct fifo_profile_gk20a *gk20a_fifo_profile_acquire(struct gk20a *g)
unsigned int index;
/* If kref is zero, profiling is not enabled */
if (!kref_get_unless_zero(&f->profile.ref))
if (!nvgpu_ref_get_unless_zero(&f->profile.ref))
return NULL;
index = atomic_inc_return(&f->profile.get.atomic_var);
profile = &f->profile.data[index % FIFO_PROFILING_ENTRIES];
@@ -352,7 +353,7 @@ struct fifo_profile_gk20a *gk20a_fifo_profile_acquire(struct gk20a *g)
void gk20a_fifo_profile_release(struct gk20a *g,
struct fifo_profile_gk20a *profile)
{
kref_put(&g->fifo.profile.ref, __gk20a_fifo_profile_free);
nvgpu_ref_put(&g->fifo.profile.ref, __gk20a_fifo_profile_free);
}
void gk20a_fifo_debugfs_deinit(struct gk20a *g)
@@ -362,7 +363,7 @@ void gk20a_fifo_debugfs_deinit(struct gk20a *g)
nvgpu_mutex_acquire(&f->profile.lock);
if (f->profile.enabled) {
f->profile.enabled = false;
kref_put(&f->profile.ref, __gk20a_fifo_profile_free);
nvgpu_ref_put(&f->profile.ref, __gk20a_fifo_profile_free);
}
nvgpu_mutex_release(&f->profile.lock);
}