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gpu: nvgpu: Move gk20a->busy_lock to os_linux

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gk20a->busy_lock is a Linux specific rw_semaphore used only
by Linux code. Move it to os_linux.

JIRA NVGPU-259

Change-Id: I220a8a080a5050732683b875d3c1d0539ba0f40e
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1569695
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Terje Bergstrom
2017-09-27 12:59:34 -07:00
committed by mobile promotions
parent 236573e00a
commit 4f56c88feb
5 changed files with 15 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/nvgpu/common/linux/driver_common.c
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@@ -42,7 +42,7 @@ static void nvgpu_init_vars(struct gk20a *g)
init_waitqueue_head(&l->sw_irq_nonstall_last_handled_wq);
gk20a_init_gr(g);
init_rwsem(&g->busy_lock);
init_rwsem(&l->busy_lock);
init_rwsem(&g->deterministic_busy);
nvgpu_spinlock_init(&g->mc_enable_lock);

19
drivers/gpu/nvgpu/common/linux/module.c
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@@ -63,6 +63,7 @@ void gk20a_busy_noresume(struct gk20a *g)
int gk20a_busy(struct gk20a *g)
{
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
int ret = 0;
struct device *dev;
@@ -71,7 +72,7 @@ int gk20a_busy(struct gk20a *g)
atomic_inc(&g->usage_count.atomic_var);
down_read(&g->busy_lock);
down_read(&l->busy_lock);
if (!gk20a_can_busy(g)) {
ret = -ENODEV;
@@ -107,7 +108,7 @@ int gk20a_busy(struct gk20a *g)
}
fail:
up_read(&g->busy_lock);
up_read(&l->busy_lock);
return ret < 0 ? ret : 0;
}
@@ -282,12 +283,13 @@ static struct of_device_id tegra_gk20a_of_match[] = {
*
* In success, this call MUST be balanced by caller with __gk20a_do_unidle()
*
* Acquires two locks : &g->busy_lock and &platform->railgate_lock
* Acquires two locks : &l->busy_lock and &platform->railgate_lock
* In success, we hold these locks and return
* In failure, we release these locks and return
*/
int __gk20a_do_idle(struct gk20a *g, bool force_reset)
{
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
struct device *dev = dev_from_gk20a(g);
struct gk20a_platform *platform = dev_get_drvdata(dev);
struct nvgpu_timeout timeout;
@@ -303,7 +305,7 @@ int __gk20a_do_idle(struct gk20a *g, bool force_reset)
gk20a_channel_deterministic_idle(g);
/* acquire busy lock to block other busy() calls */
down_write(&g->busy_lock);
down_write(&l->busy_lock);
/* acquire railgate lock to prevent unrailgate in midst of do_idle() */
nvgpu_mutex_acquire(&platform->railgate_lock);
@@ -406,7 +408,7 @@ fail_drop_usage_count:
pm_runtime_put_noidle(dev);
fail_timeout:
nvgpu_mutex_release(&platform->railgate_lock);
up_write(&g->busy_lock);
up_write(&l->busy_lock);
gk20a_channel_deterministic_unidle(g);
return -EBUSY;
}
@@ -429,6 +431,7 @@ static int gk20a_do_idle(void *_g)
*/
int __gk20a_do_unidle(struct gk20a *g)
{
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
struct device *dev = dev_from_gk20a(g);
struct gk20a_platform *platform = dev_get_drvdata(dev);
int err;
@@ -453,7 +456,7 @@ int __gk20a_do_unidle(struct gk20a *g)
/* release the lock and open up all other busy() calls */
nvgpu_mutex_release(&platform->railgate_lock);
up_write(&g->busy_lock);
up_write(&l->busy_lock);
gk20a_channel_deterministic_unidle(g);
@@ -887,12 +890,12 @@ void gk20a_driver_start_unload(struct gk20a *g)
gk20a_dbg(gpu_dbg_shutdown, "Driver is now going down!\n");
down_write(&g->busy_lock);
down_write(&l->busy_lock);
__nvgpu_set_enabled(g, NVGPU_DRIVER_IS_DYING, true);
/* GR SW ready needs to be invalidated at this time with the busy lock
* held to prevent a racing condition on the gr/mm code */
g->gr.sw_ready = false;
up_write(&g->busy_lock);
up_write(&l->busy_lock);
if (g->is_virtual)
return;

2
drivers/gpu/nvgpu/common/linux/os_linux.h
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@@ -110,6 +110,8 @@ struct nvgpu_os_linux {
struct dentry *debugfs_dump_ctxsw_stats;
#endif
struct gk20a_cde_app cde_app;
struct rw_semaphore busy_lock;
};
static inline struct nvgpu_os_linux *nvgpu_os_linux_from_gk20a(struct gk20a *g)

1
drivers/gpu/nvgpu/gk20a/gk20a.h
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@@ -1084,7 +1084,6 @@ struct gk20a {
u32 log_mask;
u32 log_trace;
struct rw_semaphore busy_lock;
/*
* Guards access to hardware when usual gk20a_{busy,idle} are skipped
* for submits and held for channel lifetime but dropped for an ongoing

2
drivers/gpu/nvgpu/vgpu/vgpu.c
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@@ -712,7 +712,7 @@ int vgpu_probe(struct platform_device *pdev)
vgpu_init_vars(gk20a, platform);
init_rwsem(&gk20a->busy_lock);
init_rwsem(&l->busy_lock);
nvgpu_spinlock_init(&gk20a->mc_enable_lock);