[PATCH 09/10] drm/etnaviv: add function to load the initial PTA state

[Lucas Stach]

On GPUs with the security feature the MTLB config is stored in the PTA.
Add a function to trigger the initial PTA load through the FE.

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
 drivers/gpu/drm/etnaviv/etnaviv_buffer.c | 18 ++++++++++++++++++
 drivers/gpu/drm/etnaviv/etnaviv_drv.h    |  1 +
 2 files changed, 19 insertions(+)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
index 99ad2f073c6e..bfc6d4aa3b7c 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
@@ -215,6 +215,24 @@ u16 etnaviv_buffer_config_mmuv2(struct etnaviv_gpu *gpu, u32 mtlb_addr, u32 safe
 	return buffer->user_size / 8;
 }
 
+u16 etnaviv_buffer_config_pta(struct etnaviv_gpu *gpu)
+{
+	struct etnaviv_cmdbuf *buffer = &gpu->buffer;
+
+	lockdep_assert_held(&gpu->lock);
+
+	buffer->user_size = 0;
+
+	CMD_LOAD_STATE(buffer, VIVS_MMUv2_PTA_CONFIG,
+		       VIVS_MMUv2_PTA_CONFIG_INDEX(0));
+
+	CMD_END(buffer);
+
+	buffer->user_size = ALIGN(buffer->user_size, 8);
+
+	return buffer->user_size / 8;
+}
+
 void etnaviv_buffer_end(struct etnaviv_gpu *gpu)
 {
 	struct etnaviv_cmdbuf *buffer = &gpu->buffer;
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.h b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
index a54f0b758a5c..7aff2df84902 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
@@ -85,6 +85,7 @@ int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file,
 	uintptr_t ptr, u32 size, u32 flags, u32 *handle);
 u16 etnaviv_buffer_init(struct etnaviv_gpu *gpu);
 u16 etnaviv_buffer_config_mmuv2(struct etnaviv_gpu *gpu, u32 mtlb_addr, u32 safe_addr);
+u16 etnaviv_buffer_config_pta(struct etnaviv_gpu *gpu);
 void etnaviv_buffer_end(struct etnaviv_gpu *gpu);
 void etnaviv_sync_point_queue(struct etnaviv_gpu *gpu, unsigned int event);
 void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, u32 exec_state,
-- 
2.11.0