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gpu: nvgpu: allocate separate client managed syncpoint for User

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We right now allocate a nvgpu managed syncpoint in c->sync and share
that with user space

But to avoid conflicts between user space and kernel space increments
allocate a separate "client managed" syncpoint for User space in c->user_sync

Add new API nvgpu_nvhost_get_syncpt_client_managed() to request a client managed
syncpoint from nvhost.
Note that nvhost/nvgpu do not keep track of MAX/threshold value of this syncpoint

Update gk20a_channel_syncpt_create() to receive a flag to indicate whether a
User space syncpoint is required or not

Unset NVGPU_SUPPORT_USER_SYNCPOINT for gp10b since we don't want to allocate
double syncpoints per channel on that platform

For gv11b, once we move to use user space submits, support for c->sync will be
dropped so we keep using only one syncpoint per channel

Bug 200326065
Jira NVGPU-179

Change-Id: I78d94de4276db1c897ea2a4fe4c2db8b2a179722
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1665828
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Deepak Nibade
2018-02-28 03:56:36 -08:00
committed by mobile promotions
parent aa1da74a75
commit df2100018d
9 changed files with 41 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.c
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@@ -315,7 +315,7 @@ static void gk20a_channel_syncpt_destroy(struct gk20a_channel_sync *s)
}
static struct gk20a_channel_sync *
gk20a_channel_syncpt_create(struct channel_gk20a *c)
gk20a_channel_syncpt_create(struct channel_gk20a *c, bool user_managed)
{
struct gk20a_channel_syncpt *sp;
char syncpt_name[32];
@@ -327,11 +327,19 @@ gk20a_channel_syncpt_create(struct channel_gk20a *c)
sp->c = c;
sp->nvhost_dev = c->g->nvhost_dev;
snprintf(syncpt_name, sizeof(syncpt_name),
"%s_%d", c->g->name, c->chid);
if (user_managed) {
snprintf(syncpt_name, sizeof(syncpt_name),
"%s_%d_user", c->g->name, c->chid);
sp->id = nvgpu_nvhost_get_syncpt_host_managed(sp->nvhost_dev,
sp->id = nvgpu_nvhost_get_syncpt_client_managed(sp->nvhost_dev,
syncpt_name);
} else {
snprintf(syncpt_name, sizeof(syncpt_name),
"%s_%d", c->g->name, c->chid);
sp->id = nvgpu_nvhost_get_syncpt_host_managed(sp->nvhost_dev,
c->chid, syncpt_name);
}
if (!sp->id) {
nvgpu_kfree(c->g, sp);
nvgpu_err(c->g, "failed to get free syncpt");
@@ -892,7 +900,7 @@ static void gk20a_channel_semaphore_destroy(struct gk20a_channel_sync *s)
}
static struct gk20a_channel_sync *
gk20a_channel_semaphore_create(struct channel_gk20a *c)
gk20a_channel_semaphore_create(struct channel_gk20a *c, bool user_managed)
{
int asid = -1;
struct gk20a_channel_semaphore *sema;
@@ -940,13 +948,14 @@ void gk20a_channel_sync_destroy(struct gk20a_channel_sync *sync)
sync->destroy(sync);
}
struct gk20a_channel_sync *gk20a_channel_sync_create(struct channel_gk20a *c)
struct gk20a_channel_sync *gk20a_channel_sync_create(struct channel_gk20a *c,
bool user_managed)
{
#ifdef CONFIG_TEGRA_GK20A_NVHOST
if (gk20a_platform_has_syncpoints(c->g))
return gk20a_channel_syncpt_create(c);
return gk20a_channel_syncpt_create(c, user_managed);
#endif
return gk20a_channel_semaphore_create(c);
return gk20a_channel_semaphore_create(c, user_managed);
}
bool gk20a_channel_sync_needs_sync_framework(struct gk20a *g)