From: Lucas Stach <l.stach@pengutronix.de>
Date: Mon, 22 Jan 2018 12:28:10 +0100
Subject: drm/etnaviv: add function to load the initial PTA state
Git-commit: 1137bef67a11d2e5a4f44ce87b6e4dd1fb7a0163
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

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@pengutronix.de>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/etnaviv/etnaviv_buffer.c |   18 ++++++++++++++++++
 drivers/gpu/drm/etnaviv/etnaviv_drv.h    |    1 +
 2 files changed, 19 insertions(+)

--- 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 e
 	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;
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
@@ -86,6 +86,7 @@ int etnaviv_gem_new_userptr(struct drm_d
 	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,