drm/imagination: Implement context creation/destruction ioctls

Implement ioctls for the creation and destruction of contexts. Contexts are
used for job submission and each is associated with a particular job type.

Changes since v8:
- Fixed one error path in pvr_stream_process_1()
- Corrected license identifiers

Changes since v5:
- Fix context release in final error path in pvr_context_create()

Changes since v3:
- Use drm_dev_{enter,exit}

Co-developed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Sarah Walker <sarah.walker@imgtec.com>
Signed-off-by: Donald Robson <donald.robson@imgtec.com>
Link: https://lore.kernel.org/r/ac474a1f7dda2582d290798e4837140a2989aa2a.1700668843.git.donald.robson@imgtec.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>

1 files changed, 125 insertions, 0 deletions

diff --git a/drivers/gpu/drm/imagination/pvr_stream_defs.c b/drivers/gpu/drm/imagination/pvr_stream_defs.c
new file mode 100644
index 000000000000..59265a7accce
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_stream_defs.c
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#include "pvr_device_info.h"
+#include "pvr_rogue_fwif_client.h"
+#include "pvr_rogue_fwif_stream.h"
+#include "pvr_stream.h"
+#include "pvr_stream_defs.h"
+
+#include <linux/stddef.h>
+#include <uapi/drm/pvr_drm.h>
+
+#define PVR_STREAM_DEF_SET(owner, member, _size, _array_size, _feature) \
+	{ .offset = offsetof(struct owner, member), \
+	  .size = (_size),  \
+	  .array_size = (_array_size), \
+	  .feature = (_feature) }
+
+#define PVR_STREAM_DEF(owner, member, member_size)  \
+	PVR_STREAM_DEF_SET(owner, member, PVR_STREAM_SIZE_ ## member_size, 0, PVR_FEATURE_NONE)
+
+#define PVR_STREAM_DEF_FEATURE(owner, member, member_size, feature) \
+	PVR_STREAM_DEF_SET(owner, member, PVR_STREAM_SIZE_ ## member_size, 0, feature)
+
+#define PVR_STREAM_DEF_NOT_FEATURE(owner, member, member_size, feature)       \
+	PVR_STREAM_DEF_SET(owner, member, PVR_STREAM_SIZE_ ## member_size, 0, \
+			   (feature) | PVR_FEATURE_NOT)
+
+#define PVR_STREAM_DEF_ARRAY(owner, member)                                       \
+	PVR_STREAM_DEF_SET(owner, member, PVR_STREAM_SIZE_ARRAY,                  \
+			   sizeof(((struct owner *)0)->member), PVR_FEATURE_NONE)
+
+#define PVR_STREAM_DEF_ARRAY_FEATURE(owner, member, feature)            \
+	PVR_STREAM_DEF_SET(owner, member, PVR_STREAM_SIZE_ARRAY,         \
+			   sizeof(((struct owner *)0)->member), feature)
+
+#define PVR_STREAM_DEF_ARRAY_NOT_FEATURE(owner, member, feature)                             \
+	PVR_STREAM_DEF_SET(owner, member, PVR_STREAM_SIZE_ARRAY,                             \
+			   sizeof(((struct owner *)0)->member), (feature) | PVR_FEATURE_NOT)
+
+/*
+ * When adding new parameters to the stream definition, the new parameters must go after the
+ * existing parameters, to preserve order. As parameters are naturally aligned, care must be taken
+ * with respect to implicit padding in the stream; padding should be minimised as much as possible.
+ */
+static const struct pvr_stream_def rogue_fwif_static_render_context_state_stream[] = {
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_reg_vdm_context_state_base_addr, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_reg_vdm_context_state_resume_addr, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_reg_ta_context_state_base_addr, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[0].geom_reg_vdm_context_store_task0, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[0].geom_reg_vdm_context_store_task1, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[0].geom_reg_vdm_context_store_task2, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[0].geom_reg_vdm_context_store_task3, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[0].geom_reg_vdm_context_store_task4, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[0].geom_reg_vdm_context_resume_task0, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[0].geom_reg_vdm_context_resume_task1, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[0].geom_reg_vdm_context_resume_task2, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[0].geom_reg_vdm_context_resume_task3, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[0].geom_reg_vdm_context_resume_task4, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[1].geom_reg_vdm_context_store_task0, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[1].geom_reg_vdm_context_store_task1, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[1].geom_reg_vdm_context_store_task2, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[1].geom_reg_vdm_context_store_task3, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[1].geom_reg_vdm_context_store_task4, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[1].geom_reg_vdm_context_resume_task0, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[1].geom_reg_vdm_context_resume_task1, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[1].geom_reg_vdm_context_resume_task2, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[1].geom_reg_vdm_context_resume_task3, 64),
+	PVR_STREAM_DEF(rogue_fwif_geom_registers_caswitch,
+		       geom_state[1].geom_reg_vdm_context_resume_task4, 64),
+};
+
+const struct pvr_stream_cmd_defs pvr_static_render_context_state_stream = {
+	.type = PVR_STREAM_TYPE_STATIC_RENDER_CONTEXT,
+
+	.main_stream = rogue_fwif_static_render_context_state_stream,
+	.main_stream_len = ARRAY_SIZE(rogue_fwif_static_render_context_state_stream),
+
+	.ext_nr_headers = 0,
+
+	.dest_size = sizeof(struct rogue_fwif_geom_registers_caswitch),
+};
+
+static const struct pvr_stream_def rogue_fwif_static_compute_context_state_stream[] = {
+	PVR_STREAM_DEF(rogue_fwif_cdm_registers_cswitch, cdmreg_cdm_context_pds0, 64),
+	PVR_STREAM_DEF(rogue_fwif_cdm_registers_cswitch, cdmreg_cdm_context_pds1, 64),
+	PVR_STREAM_DEF(rogue_fwif_cdm_registers_cswitch, cdmreg_cdm_terminate_pds, 64),
+	PVR_STREAM_DEF(rogue_fwif_cdm_registers_cswitch, cdmreg_cdm_terminate_pds1, 64),
+	PVR_STREAM_DEF(rogue_fwif_cdm_registers_cswitch, cdmreg_cdm_resume_pds0, 64),
+	PVR_STREAM_DEF(rogue_fwif_cdm_registers_cswitch, cdmreg_cdm_context_pds0_b, 64),
+	PVR_STREAM_DEF(rogue_fwif_cdm_registers_cswitch, cdmreg_cdm_resume_pds0_b, 64),
+};
+
+const struct pvr_stream_cmd_defs pvr_static_compute_context_state_stream = {
+	.type = PVR_STREAM_TYPE_STATIC_COMPUTE_CONTEXT,
+
+	.main_stream = rogue_fwif_static_compute_context_state_stream,
+	.main_stream_len = ARRAY_SIZE(rogue_fwif_static_compute_context_state_stream),
+
+	.ext_nr_headers = 0,
+
+	.dest_size = sizeof(struct rogue_fwif_cdm_registers_cswitch),
+};