[PATCH 07/83] drm/radeon: Add kfd-->kgd interface of locking srbm_gfx_cntl register

[Oded Gabbay <oded.gabbay@gmail.com>]

This patch adds a new interface to kfd2kgd_calls structure, which
allows the kfd to lock and unlock the srbm_gfx_cntl register

Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
---
 drivers/gpu/drm/radeon/radeon_kfd.c | 20 ++++++++++++++++++++
 include/linux/radeon_kfd.h          |  4 ++++
 2 files changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/radeon/radeon_kfd.c b/drivers/gpu/drm/radeon/radeon_kfd.c
index 66ee36b..594020e 100644
--- a/drivers/gpu/drm/radeon/radeon_kfd.c
+++ b/drivers/gpu/drm/radeon/radeon_kfd.c
@@ -43,6 +43,10 @@ static void unkmap_mem(struct kgd_dev *kgd, struct kgd_mem *mem);
 
 static uint64_t get_vmem_size(struct kgd_dev *kgd);
 
+static void lock_srbm_gfx_cntl(struct kgd_dev *kgd);
+static void unlock_srbm_gfx_cntl(struct kgd_dev *kgd);
+
+
 static const struct kfd2kgd_calls kfd2kgd = {
 	.allocate_mem = allocate_mem,
 	.free_mem = free_mem,
@@ -51,6 +55,8 @@ static const struct kfd2kgd_calls kfd2kgd = {
 	.kmap_mem = kmap_mem,
 	.unkmap_mem = unkmap_mem,
 	.get_vmem_size = get_vmem_size,
+	.lock_srbm_gfx_cntl = lock_srbm_gfx_cntl,
+	.unlock_srbm_gfx_cntl = unlock_srbm_gfx_cntl,
 };
 
 static const struct kgd2kfd_calls *kgd2kfd;
@@ -233,3 +239,17 @@ static uint64_t get_vmem_size(struct kgd_dev *kgd)
 
 	return rdev->mc.real_vram_size;
 }
+
+static void lock_srbm_gfx_cntl(struct kgd_dev *kgd)
+{
+	struct radeon_device *rdev = (struct radeon_device *)kgd;
+
+	mutex_lock(&rdev->srbm_mutex);
+}
+
+static void unlock_srbm_gfx_cntl(struct kgd_dev *kgd)
+{
+	struct radeon_device *rdev = (struct radeon_device *)kgd;
+
+	mutex_unlock(&rdev->srbm_mutex);
+}
diff --git a/include/linux/radeon_kfd.h b/include/linux/radeon_kfd.h
index c7997d4..40b691c 100644
--- a/include/linux/radeon_kfd.h
+++ b/include/linux/radeon_kfd.h
@@ -81,6 +81,10 @@ struct kfd2kgd_calls {
 	void (*unkmap_mem)(struct kgd_dev *kgd, struct kgd_mem *mem);
 
 	uint64_t (*get_vmem_size)(struct kgd_dev *kgd);
+
+	/* SRBM_GFX_CNTL mutex */
+	void (*lock_srbm_gfx_cntl)(struct kgd_dev *kgd);
+	void (*unlock_srbm_gfx_cntl)(struct kgd_dev *kgd);
 };
 
 bool kgd2kfd_init(unsigned interface_version,
-- 
1.9.1