gpu: nvgpu: move nvgpu_has_syncpoints

nvgpu_has_syncpoints is more general than a channel synchronization
related, so move it to nvhost.c from channel_sync.c. Move the
declaration from gk20a.h to nvhost.h.

As the debugfs knob is Linux related, move it from struct gk20a to
struct nvgpu_os_linux.

Jira NVGPU-4548

Change-Id: I4236086744993c3daac042f164de30939c01ee77
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2318814
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/common/init/nvgpu_init.c

@@ -37,6 +37,7 @@
 #include <nvgpu/nvgpu_init.h>
 #include <nvgpu/gops_mc.h>
 #include <nvgpu/trace.h>
+#include <nvgpu/nvhost.h>
 
 #ifdef CONFIG_NVGPU_LS_PMU
 #include <nvgpu/pmu/pmu_pstate.h>

drivers/gpu/nvgpu/common/mm/vm.c

@@ -39,6 +39,7 @@
 #include <nvgpu/vgpu/vm_vgpu.h>
 #include <nvgpu/cbc.h>
 #include <nvgpu/static_analysis.h>
+#include <nvgpu/nvhost.h>
 
 struct nvgpu_ctag_buffer_info {
 	u64			size;

drivers/gpu/nvgpu/common/sync/channel_sync.c

@@ -58,16 +58,6 @@ bool nvgpu_channel_sync_needs_os_fence_framework(struct gk20a *g)
 	return !nvgpu_has_syncpoints(g);
 }
 
-bool nvgpu_has_syncpoints(struct gk20a *g)
-{
-#ifdef CONFIG_TEGRA_GK20A_NVHOST
-	return nvgpu_is_enabled(g, NVGPU_HAS_SYNCPOINTS) &&
-		!g->disable_syncpoints;
-#else
-	return false;
-#endif
-}
-
 #ifdef CONFIG_NVGPU_KERNEL_MODE_SUBMIT
 int nvgpu_channel_sync_wait_fence_fd(struct nvgpu_channel_sync *s, int fd,
 	struct priv_cmd_entry *entry, u32 max_wait_cmds)

drivers/gpu/nvgpu/hal/init/hal_tu104.c

@@ -234,6 +234,7 @@
 #include <nvgpu/pmu/pmu_perfmon.h>
 #include <nvgpu/nvgpu_init.h>
 #include <nvgpu/sbr.h>
+#include <nvgpu/nvhost.h>
 
 #include <nvgpu/hw/tu104/hw_pwr_tu104.h>
 

drivers/gpu/nvgpu/include/nvgpu/gk20a.h

@@ -800,9 +800,6 @@ struct gk20a {
 	unsigned int aggressive_sync_destroy_thresh;
 	bool aggressive_sync_destroy;
 
-	/** Debugfs knob for forcing syncpt support off in runtime. */
-	bool disable_syncpoints;
-
 	/** Is LS PMU supported? */
 	bool support_ls_pmu;
 
@@ -1086,8 +1083,6 @@ int gk20a_do_unidle_impl(struct gk20a *g);
 /** tu104 HW version */
 #define NVGPU_GPUID_TU104   0x00000164U
 
-bool nvgpu_has_syncpoints(struct gk20a *g);
-
 /**
  * @}
  */

drivers/gpu/nvgpu/include/nvgpu/nvhost.h

@@ -23,12 +23,13 @@
 #ifndef NVGPU_NVHOST_H
 #define NVGPU_NVHOST_H
 
-#ifdef CONFIG_TEGRA_GK20A_NVHOST
-
 #include <nvgpu/types.h>
 
-struct nvgpu_nvhost_dev;
 struct gk20a;
+
+#ifdef CONFIG_TEGRA_GK20A_NVHOST
+
+struct nvgpu_nvhost_dev;
 struct sync_pt;
 struct sync_fence;
 struct timespec;
@@ -71,6 +72,15 @@ int nvgpu_get_nvhost_dev(struct gk20a *g);
  */
 void nvgpu_free_nvhost_dev(struct gk20a *g);
 
+/**
+ * @brief Check if the gpu has access to syncpoints.
+ *
+ * @param g [in]	The GPU super structure.
+ *
+ * @return		whether syncpt access is available
+ */
+bool nvgpu_has_syncpoints(struct gk20a *g);
+
 #ifdef CONFIG_NVGPU_KERNEL_MODE_SUBMIT
 /**
  * Available waiter index is used for sync point wait path.
@@ -289,6 +299,19 @@ static inline int nvgpu_nvhost_syncpt_init(struct gk20a *g)
 {
 	return 0;
 }
-#endif
+#endif /* CONFIG_TEGRA_T19X_GRHOST */
+#else /* CONFIG_TEGRA_GK20A_NVHOST */
+/**
+ * @brief Check if the gpu has access to syncpoints.
+ *
+ * @param g [in]	The GPU super structure.
+ *
+ * @return		whether syncpt access is available
+ */
+static inline bool nvgpu_has_syncpoints(struct gk20a *g)
+{
+	return false;
+}
+
 #endif /* CONFIG_TEGRA_GK20A_NVHOST */
 #endif /* NVGPU_NVHOST_H */

drivers/gpu/nvgpu/include/nvgpu/posix/posix-nvhost.h

@@ -37,9 +37,11 @@ struct nvgpu_nvhost_dev {
 	u32 syncpt_value;
 };
 
+int nvgpu_get_nvhost_dev(struct gk20a *g);
+
 void nvgpu_free_nvhost_dev(struct gk20a *g);
 
-int nvgpu_get_nvhost_dev(struct gk20a *g);
+bool nvgpu_has_syncpoints(struct gk20a *g);
 
 int nvgpu_nvhost_get_syncpt_aperture(
 		struct nvgpu_nvhost_dev *nvgpu_syncpt_dev,

drivers/gpu/nvgpu/os/linux/debug.c

@@ -363,7 +363,7 @@ void gk20a_debug_init(struct gk20a *g, const char *debugfs_symlink)
 		l->debugfs, &g->ch_wdt_init_limit_ms);
 
 	debugfs_create_bool("disable_syncpoints", S_IRUGO,
-		l->debugfs, &g->disable_syncpoints);
+		l->debugfs, &l->disable_syncpoints);
 
 	/* New debug logging API. */
 	debugfs_create_u64("log_mask", S_IRUGO|S_IWUSR,

drivers/gpu/nvgpu/os/linux/ioctl_as.c

@@ -26,6 +26,7 @@
 #include <nvgpu/gk20a.h>
 #include <nvgpu/nvgpu_init.h>
 #include <nvgpu/channel.h>
+#include <nvgpu/nvhost.h>
 
 #include <nvgpu/linux/vm.h>
 

drivers/gpu/nvgpu/os/linux/nvhost.c

@@ -67,6 +67,14 @@ void nvgpu_free_nvhost_dev(struct gk20a *g)
 	nvgpu_kfree(g, g->nvhost);
 }
 
+bool nvgpu_has_syncpoints(struct gk20a *g)
+{
+	struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
+
+	return nvgpu_is_enabled(g, NVGPU_HAS_SYNCPOINTS) &&
+		!l->disable_syncpoints;
+}
+
 int nvgpu_nvhost_module_busy_ext(
 	struct nvgpu_nvhost_dev *nvhost_dev)
 {

drivers/gpu/nvgpu/os/linux/os_linux.h

@@ -175,6 +175,9 @@ struct nvgpu_os_linux {
 	struct rw_semaphore busy_lock;
 
 	bool init_done;
+
+	/** Debugfs knob for forcing syncpt support off in runtime. */
+	bool disable_syncpoints;
 };
 
 static inline struct nvgpu_os_linux *nvgpu_os_linux_from_gk20a(struct gk20a *g)

drivers/gpu/nvgpu/os/posix/posix-nvhost.c

@@ -32,6 +32,11 @@ void nvgpu_free_nvhost_dev(struct gk20a *g) {
 	}
 }
 
+bool nvgpu_has_syncpoints(struct gk20a *g)
+{
+	return nvgpu_is_enabled(g, NVGPU_HAS_SYNCPOINTS);
+}
+
 static void allocate_new_syncpt(struct nvgpu_nvhost_dev *nvgpu_syncpt_dev)
 {
 	u32 syncpt_id, syncpt_val;

userspace/units/sync/nvgpu-sync.c

@@ -424,7 +424,6 @@ done:
 	return ret;
 }
 
-#define F_SYNC_GLOBAL_DISABLE_SYNCPT		0
 #define F_SYNC_SYNCPT_ALLOC_FAILED		1
 #define F_SYNC_USER_MANAGED			2
 #define F_SYNC_STRADD_FAIL			3
@@ -451,10 +450,6 @@ static void clear_test_params(struct gk20a *g,
 		bool *fault_injection_enabled, u32 branch,
 		struct nvgpu_posix_fault_inj *kmem_fi)
 {
-	if (g->disable_syncpoints) {
-		g->disable_syncpoints = false;
-	}
-
 	if (ch->vm->guest_managed) {
 		ch->vm->guest_managed = false;
 	}
@@ -491,9 +486,7 @@ int test_sync_create_fail(struct unit_module *m, struct gk20a *g, void *args)
 		 */
 		g->nvhost->syncpt_id = 0U;
 
-		if (branches == F_SYNC_GLOBAL_DISABLE_SYNCPT) {
-			g->disable_syncpoints = true;
-		} else if (branches == F_SYNC_SYNCPT_ALLOC_FAILED) {
+		if (branches == F_SYNC_SYNCPT_ALLOC_FAILED) {
 			/* fail first kzalloc call */
 			nvgpu_posix_enable_fault_injection(kmem_fi, true, 0);
 			fault_injection_enabled = true;