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 <[email protected]>
Signed-off-by: Boris Brezillon <[email protected]>
Signed-off-by: Sarah Walker <[email protected]>
Signed-off-by: Donald Robson <[email protected]>
Link: https://lore.kernel.org/r/ac474a1f7dda2582d290798e4837140a2989aa2a.1700668843.git.donald.robson@imgtec.com
Signed-off-by: Maxime Ripard <[email protected]>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/gpu/drm/imagination/pvr_device.h b/drivers/gpu/drm/imagination/pvr_device.h
index f5b82b793566..299f3e022c82 100644
--- a/drivers/gpu/drm/imagination/pvr_device.h
+++ b/drivers/gpu/drm/imagination/pvr_device.h
@@ -7,6 +7,8 @@
 #include "pvr_ccb.h"
 #include "pvr_device_info.h"
 #include "pvr_fw.h"
+#include "pvr_rogue_fwif_stream.h"
+#include "pvr_stream.h"
 
 #include <drm/drm_device.h>
 #include <drm/drm_file.h>
@@ -146,6 +148,9 @@ struct pvr_device {
 	/** @fw_dev: Firmware related data. */
 	struct pvr_fw_device fw_dev;
 
+	/** @stream_musthave_quirks: Bit array of "must-have" quirks for stream commands. */
+	u32 stream_musthave_quirks[PVR_STREAM_TYPE_MAX][PVR_STREAM_EXTHDR_TYPE_MAX];
+
 	/**
 	 * @mmu_flush_cache_flags: Records which MMU caches require flushing
 	 * before submitting the next job.
@@ -153,6 +158,14 @@ struct pvr_device {
 	atomic_t mmu_flush_cache_flags;
 
 	/**
+	 * @ctx_ids: Array of contexts belonging to this device. Array members
+	 *           are of type "struct pvr_context *".
+	 *
+	 * This array is used to allocate IDs used by the firmware.
+	 */
+	struct xarray ctx_ids;
+
+	/**
 	 * @free_list_ids: Array of free lists belonging to this device. Array members
 	 *                 are of type "struct pvr_free_list *".
 	 *
@@ -256,6 +269,14 @@ struct pvr_file {
 	struct pvr_device *pvr_dev;
 
 	/**
+	 * @ctx_handles: Array of contexts belonging to this file. Array members
+	 *               are of type "struct pvr_context *".
+	 *
+	 * This array is used to allocate handles returned to userspace.
+	 */
+	struct xarray ctx_handles;
+
+	/**
 	 * @free_list_handles: Array of free lists belonging to this file. Array
 	 * members are of type "struct pvr_free_list *".
 	 *