[PATCH v5 13/17] drm/imagination: Implement context creation/destruction ioctls
From: Sarah Walker
Date: Wed Aug 16 2023 - 04:27:55 EST
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 v3:
- Use drm_dev_{enter,exit}
Co-developed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Signed-off-by: Sarah Walker <sarah.walker@xxxxxxxxxx>
---
drivers/gpu/drm/imagination/Makefile | 4 +
drivers/gpu/drm/imagination/pvr_cccb.c | 267 ++++++++++++++
drivers/gpu/drm/imagination/pvr_cccb.h | 109 ++++++
drivers/gpu/drm/imagination/pvr_context.c | 337 ++++++++++++++++++
drivers/gpu/drm/imagination/pvr_context.h | 161 +++++++++
drivers/gpu/drm/imagination/pvr_device.h | 21 ++
drivers/gpu/drm/imagination/pvr_drv.c | 29 +-
drivers/gpu/drm/imagination/pvr_stream.c | 285 +++++++++++++++
drivers/gpu/drm/imagination/pvr_stream.h | 75 ++++
drivers/gpu/drm/imagination/pvr_stream_defs.c | 125 +++++++
drivers/gpu/drm/imagination/pvr_stream_defs.h | 16 +
11 files changed, 1427 insertions(+), 2 deletions(-)
create mode 100644 drivers/gpu/drm/imagination/pvr_cccb.c
create mode 100644 drivers/gpu/drm/imagination/pvr_cccb.h
create mode 100644 drivers/gpu/drm/imagination/pvr_context.c
create mode 100644 drivers/gpu/drm/imagination/pvr_context.h
create mode 100644 drivers/gpu/drm/imagination/pvr_stream.c
create mode 100644 drivers/gpu/drm/imagination/pvr_stream.h
create mode 100644 drivers/gpu/drm/imagination/pvr_stream_defs.c
create mode 100644 drivers/gpu/drm/imagination/pvr_stream_defs.h
diff --git a/drivers/gpu/drm/imagination/Makefile b/drivers/gpu/drm/imagination/Makefile
index fca2ee2efbac..0c8ab120f277 100644
--- a/drivers/gpu/drm/imagination/Makefile
+++ b/drivers/gpu/drm/imagination/Makefile
@@ -5,6 +5,8 @@ subdir-ccflags-y := -I$(srctree)/$(src)
powervr-y := \
pvr_ccb.o \
+ pvr_cccb.o \
+ pvr_context.o \
pvr_device.o \
pvr_device_info.o \
pvr_drv.o \
@@ -18,6 +20,8 @@ powervr-y := \
pvr_hwrt.o \
pvr_mmu.o \
pvr_power.o \
+ pvr_stream.o \
+ pvr_stream_defs.o \
pvr_vm.o \
pvr_vm_mips.o
diff --git a/drivers/gpu/drm/imagination/pvr_cccb.c b/drivers/gpu/drm/imagination/pvr_cccb.c
new file mode 100644
index 000000000000..8dfc157c3c10
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_cccb.c
@@ -0,0 +1,267 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#include "pvr_ccb.h"
+#include "pvr_cccb.h"
+#include "pvr_device.h"
+#include "pvr_gem.h"
+#include "pvr_hwrt.h"
+
+#include <linux/compiler.h>
+#include <linux/delay.h>
+#include <linux/jiffies.h>
+#include <linux/mutex.h>
+#include <linux/types.h>
+
+static __always_inline u32
+get_ccb_space(u32 w_off, u32 r_off, u32 ccb_size)
+{
+ return (((r_off) - (w_off)) + ((ccb_size) - 1)) & ((ccb_size) - 1);
+}
+
+static void
+cccb_ctrl_init(void *cpu_ptr, void *priv)
+{
+ struct rogue_fwif_cccb_ctl *ctrl = cpu_ptr;
+ struct pvr_cccb *pvr_cccb = priv;
+
+ WRITE_ONCE(ctrl->write_offset, 0);
+ WRITE_ONCE(ctrl->read_offset, 0);
+ WRITE_ONCE(ctrl->dep_offset, 0);
+ WRITE_ONCE(ctrl->wrap_mask, pvr_cccb->wrap_mask);
+}
+
+/**
+ * pvr_cccb_init() - Initialise a Client CCB
+ * @pvr_dev: Device pointer.
+ * @pvr_cccb: Pointer to Client CCB structure to initialise.
+ * @size_log2: Log2 size of Client CCB in bytes.
+ * @name: Name of owner of Client CCB. Used for fence context.
+ *
+ * Return:
+ * * Zero on success, or
+ * * Any error code returned by pvr_fw_object_create_and_map().
+ */
+int
+pvr_cccb_init(struct pvr_device *pvr_dev, struct pvr_cccb *pvr_cccb,
+ u32 size_log2, const char *name)
+{
+ size_t size = 1 << size_log2;
+ int err;
+
+ pvr_cccb->size = size;
+ pvr_cccb->write_offset = 0;
+ pvr_cccb->wrap_mask = size - 1;
+
+ /*
+ * Map CCCB and control structure as uncached, so we don't have to flush
+ * CPU cache repeatedly when polling for space.
+ */
+ pvr_cccb->ctrl = pvr_fw_object_create_and_map(pvr_dev, sizeof(*pvr_cccb->ctrl),
+ PVR_BO_FW_FLAGS_DEVICE_UNCACHED,
+ cccb_ctrl_init, pvr_cccb,
+ &pvr_cccb->ctrl_obj);
+ if (IS_ERR(pvr_cccb->ctrl))
+ return PTR_ERR(pvr_cccb->ctrl);
+
+ pvr_cccb->cccb = pvr_fw_object_create_and_map(pvr_dev, size,
+ PVR_BO_FW_FLAGS_DEVICE_UNCACHED,
+ NULL, NULL, &pvr_cccb->cccb_obj);
+ if (IS_ERR(pvr_cccb->cccb)) {
+ err = PTR_ERR(pvr_cccb->cccb);
+ goto err_free_ctrl;
+ }
+
+ pvr_fw_object_get_fw_addr(pvr_cccb->ctrl_obj, &pvr_cccb->ctrl_fw_addr);
+ pvr_fw_object_get_fw_addr(pvr_cccb->cccb_obj, &pvr_cccb->cccb_fw_addr);
+
+ return 0;
+
+err_free_ctrl:
+ pvr_fw_object_unmap_and_destroy(pvr_cccb->ctrl_obj);
+
+ return err;
+}
+
+/**
+ * pvr_cccb_fini() - Release Client CCB structure
+ * @pvr_cccb: Client CCB to release.
+ */
+void
+pvr_cccb_fini(struct pvr_cccb *pvr_cccb)
+{
+ pvr_fw_object_unmap_and_destroy(pvr_cccb->cccb_obj);
+ pvr_fw_object_unmap_and_destroy(pvr_cccb->ctrl_obj);
+}
+
+/**
+ * pvr_cccb_cmdseq_fits() - Check if a command sequence fits in the CCCB
+ * @pvr_cccb: Target Client CCB.
+ * @size: Size of the command sequence.
+ *
+ * Check if a command sequence fits in the CCCB we have at hand.
+ *
+ * Return:
+ * * true if the command sequence fits in the CCCB, or
+ * * false otherwise.
+ */
+bool pvr_cccb_cmdseq_fits(struct pvr_cccb *pvr_cccb, size_t size)
+{
+ struct rogue_fwif_cccb_ctl *ctrl = pvr_cccb->ctrl;
+ u32 read_offset, remaining;
+ bool fits = false;
+
+ read_offset = READ_ONCE(ctrl->read_offset);
+ remaining = pvr_cccb->size - pvr_cccb->write_offset;
+
+ /* Always ensure we have enough room for a padding command at the end of the CCCB.
+ * If our command sequence does not fit, reserve the remaining space for a padding
+ * command.
+ */
+ if (size + PADDING_COMMAND_SIZE > remaining)
+ size += remaining;
+
+ if (get_ccb_space(pvr_cccb->write_offset, read_offset, pvr_cccb->size) >= size)
+ fits = true;
+
+ return fits;
+}
+
+/**
+ * pvr_cccb_write_command_with_header() - Write a command + command header to a
+ * Client CCB
+ * @pvr_cccb: Target Client CCB.
+ * @cmd_type: Client CCB command type. Must be one of %ROGUE_FWIF_CCB_CMD_TYPE_*.
+ * @cmd_size: Size of command in bytes.
+ * @cmd_data: Pointer to command to write.
+ * @ext_job_ref: External job reference.
+ * @int_job_ref: Internal job reference.
+ *
+ * Caller must make sure there's enough space in CCCB to queue this command. This
+ * can be done by calling pvr_cccb_cmdseq_fits().
+ *
+ * This function is not protected by any lock. The caller must ensure there's
+ * no concurrent caller, which should be guaranteed by the drm_sched model (job
+ * submission is serialized in drm_sched_main()).
+ */
+void
+pvr_cccb_write_command_with_header(struct pvr_cccb *pvr_cccb, u32 cmd_type, u32 cmd_size,
+ void *cmd_data, u32 ext_job_ref, u32 int_job_ref)
+{
+ u32 sz_with_hdr = pvr_cccb_get_size_of_cmd_with_hdr(cmd_size);
+ struct rogue_fwif_ccb_cmd_header cmd_header = {
+ .cmd_type = cmd_type,
+ .cmd_size = ALIGN(cmd_size, 8),
+ .ext_job_ref = ext_job_ref,
+ .int_job_ref = int_job_ref,
+ };
+ struct rogue_fwif_cccb_ctl *ctrl = pvr_cccb->ctrl;
+ u32 remaining = pvr_cccb->size - pvr_cccb->write_offset;
+ u32 required_size, cccb_space, read_offset;
+
+ /*
+ * Always ensure we have enough room for a padding command at the end of
+ * the CCCB.
+ */
+ if (remaining < sz_with_hdr + PADDING_COMMAND_SIZE) {
+ /*
+ * Command would need to wrap, so we need to pad the remainder
+ * of the CCCB.
+ */
+ required_size = sz_with_hdr + remaining;
+ } else {
+ required_size = sz_with_hdr;
+ }
+
+ read_offset = READ_ONCE(ctrl->read_offset);
+ cccb_space = get_ccb_space(pvr_cccb->write_offset, read_offset, pvr_cccb->size);
+ if (WARN_ON(cccb_space < required_size))
+ return;
+
+ if (required_size != sz_with_hdr) {
+ /* Add padding command */
+ struct rogue_fwif_ccb_cmd_header pad_cmd = {
+ .cmd_type = ROGUE_FWIF_CCB_CMD_TYPE_PADDING,
+ .cmd_size = remaining - sizeof(pad_cmd),
+ };
+
+ memcpy(&pvr_cccb->cccb[pvr_cccb->write_offset], &pad_cmd, sizeof(pad_cmd));
+ pvr_cccb->write_offset = 0;
+ }
+
+ memcpy(&pvr_cccb->cccb[pvr_cccb->write_offset], &cmd_header, sizeof(cmd_header));
+ memcpy(&pvr_cccb->cccb[pvr_cccb->write_offset + sizeof(cmd_header)], cmd_data, cmd_size);
+ pvr_cccb->write_offset += sz_with_hdr;
+}
+
+static void fill_cmd_kick_data(struct pvr_cccb *cccb, u32 ctx_fw_addr,
+ struct pvr_hwrt_data *hwrt,
+ struct rogue_fwif_kccb_cmd_kick_data *k)
+{
+ k->context_fw_addr = ctx_fw_addr;
+ k->client_woff_update = cccb->write_offset;
+ k->client_wrap_mask_update = cccb->wrap_mask;
+
+ if (hwrt) {
+ u32 cleanup_state_offset = offsetof(struct rogue_fwif_hwrtdata, cleanup_state);
+
+ pvr_fw_object_get_fw_addr_offset(hwrt->fw_obj, cleanup_state_offset,
+ &k->cleanup_ctl_fw_addr[k->num_cleanup_ctl++]);
+ }
+}
+
+/**
+ * pvr_cccb_send_kccb_kick: Send KCCB kick to trigger command processing
+ * @pvr_dev: Device pointer.
+ * @pvr_cccb: Pointer to CCCB to process.
+ * @cctx_fw_addr: FW virtual address for context owning this Client CCB.
+ * @hwrt: HWRT data set associated with this kick. May be %NULL.
+ *
+ * You must call pvr_kccb_reserve_slot() and wait for the returned fence to
+ * signal (if this function didn't return NULL) before calling
+ * pvr_cccb_send_kccb_kick().
+ */
+void
+pvr_cccb_send_kccb_kick(struct pvr_device *pvr_dev,
+ struct pvr_cccb *pvr_cccb, u32 cctx_fw_addr,
+ struct pvr_hwrt_data *hwrt)
+{
+ struct rogue_fwif_kccb_cmd cmd_kick = {
+ .cmd_type = ROGUE_FWIF_KCCB_CMD_KICK,
+ };
+
+ fill_cmd_kick_data(pvr_cccb, cctx_fw_addr, hwrt, &cmd_kick.cmd_data.cmd_kick_data);
+
+ /* Make sure the writes to the CCCB are flushed before sending the KICK. */
+ wmb();
+
+ pvr_kccb_send_cmd_reserved_powered(pvr_dev, &cmd_kick, NULL);
+}
+
+void
+pvr_cccb_send_kccb_combined_kick(struct pvr_device *pvr_dev,
+ struct pvr_cccb *geom_cccb,
+ struct pvr_cccb *frag_cccb,
+ u32 geom_ctx_fw_addr,
+ u32 frag_ctx_fw_addr,
+ struct pvr_hwrt_data *hwrt,
+ bool frag_is_pr)
+{
+ struct rogue_fwif_kccb_cmd cmd_kick = {
+ .cmd_type = ROGUE_FWIF_KCCB_CMD_COMBINED_GEOM_FRAG_KICK,
+ };
+
+ fill_cmd_kick_data(geom_cccb, geom_ctx_fw_addr, hwrt,
+ &cmd_kick.cmd_data.combined_geom_frag_cmd_kick_data.geom_cmd_kick_data);
+
+ /* If this is a partial-render job, we don't attach resources to cleanup-ctl array,
+ * because the resources are already retained by the geometry job.
+ */
+ fill_cmd_kick_data(frag_cccb, frag_ctx_fw_addr, frag_is_pr ? NULL : hwrt,
+ &cmd_kick.cmd_data.combined_geom_frag_cmd_kick_data.frag_cmd_kick_data);
+
+ /* Make sure the writes to the CCCB are flushed before sending the KICK. */
+ wmb();
+
+ pvr_kccb_send_cmd_reserved_powered(pvr_dev, &cmd_kick, NULL);
+}
diff --git a/drivers/gpu/drm/imagination/pvr_cccb.h b/drivers/gpu/drm/imagination/pvr_cccb.h
new file mode 100644
index 000000000000..a9f5f38b874b
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_cccb.h
@@ -0,0 +1,109 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#ifndef PVR_CCCB_H
+#define PVR_CCCB_H
+
+#include "pvr_rogue_fwif.h"
+#include "pvr_rogue_fwif_shared.h"
+
+#include <linux/mutex.h>
+#include <linux/types.h>
+
+#define PADDING_COMMAND_SIZE sizeof(struct rogue_fwif_ccb_cmd_header)
+
+/* Forward declaration from pvr_device.h. */
+struct pvr_device;
+
+/* Forward declaration from pvr_gem.h. */
+struct pvr_fw_object;
+
+/* Forward declaration from pvr_hwrt.h. */
+struct pvr_hwrt_data;
+
+struct pvr_cccb {
+ /** @ctrl_obj: FW object representing CCCB control structure. */
+ struct pvr_fw_object *ctrl_obj;
+
+ /** @ccb_obj: FW object representing CCCB. */
+ struct pvr_fw_object *cccb_obj;
+
+ /**
+ * @ctrl: Kernel mapping of CCCB control structure. @lock must be held
+ * when accessing.
+ */
+ struct rogue_fwif_cccb_ctl *ctrl;
+
+ /** @cccb: Kernel mapping of CCCB. @lock must be held when accessing.*/
+ u8 *cccb;
+
+ /** @ctrl_fw_addr: FW virtual address of CCCB control structure. */
+ u32 ctrl_fw_addr;
+ /** @ccb_fw_addr: FW virtual address of CCCB. */
+ u32 cccb_fw_addr;
+
+ /** @size: Size of CCCB in bytes. */
+ size_t size;
+
+ /** @write_offset: CCCB write offset. */
+ u32 write_offset;
+
+ /** @wrap_mask: CCCB wrap mask. */
+ u32 wrap_mask;
+};
+
+int pvr_cccb_init(struct pvr_device *pvr_dev, struct pvr_cccb *cccb,
+ u32 size_log2, const char *name);
+void pvr_cccb_fini(struct pvr_cccb *cccb);
+
+void pvr_cccb_write_command_with_header(struct pvr_cccb *pvr_cccb,
+ u32 cmd_type, u32 cmd_size, void *cmd_data,
+ u32 ext_job_ref, u32 int_job_ref);
+void pvr_cccb_send_kccb_kick(struct pvr_device *pvr_dev,
+ struct pvr_cccb *pvr_cccb, u32 cctx_fw_addr,
+ struct pvr_hwrt_data *hwrt);
+void pvr_cccb_send_kccb_combined_kick(struct pvr_device *pvr_dev,
+ struct pvr_cccb *geom_cccb,
+ struct pvr_cccb *frag_cccb,
+ u32 geom_ctx_fw_addr,
+ u32 frag_ctx_fw_addr,
+ struct pvr_hwrt_data *hwrt,
+ bool frag_is_pr);
+bool pvr_cccb_cmdseq_fits(struct pvr_cccb *pvr_cccb, size_t size);
+
+/**
+ * pvr_cccb_get_size_of_cmd_with_hdr() - Get the size of a command and its header.
+ * @cmd_size: Command size.
+ *
+ * Returns the size of the command and its header.
+ */
+static __always_inline u32
+pvr_cccb_get_size_of_cmd_with_hdr(u32 cmd_size)
+{
+ WARN_ON(!IS_ALIGNED(cmd_size, 8));
+ return sizeof(struct rogue_fwif_ccb_cmd_header) + ALIGN(cmd_size, 8);
+}
+
+/**
+ * pvr_cccb_cmdseq_can_fit() - Check if a command sequence can fit in the CCCB.
+ * @size: Command sequence size.
+ *
+ * Returns:
+ * * true it the CCCB is big enough to contain a command sequence, or
+ * * false otherwise.
+ */
+static __always_inline bool
+pvr_cccb_cmdseq_can_fit(struct pvr_cccb *pvr_cccb, size_t size)
+{
+ /* We divide the capacity by two to simplify our CCCB fencing logic:
+ * we want to be sure that, no matter what we had queued before, we
+ * are able to either queue our command sequence at the end or add a
+ * padding command and queue the command sequence at the beginning
+ * of the CCCB. If the command sequence size is bigger than half the
+ * CCCB capacity, we'd have to queue the padding command and make sure
+ * the FW is done processing it before queueing our command sequence.
+ */
+ return size + PADDING_COMMAND_SIZE <= pvr_cccb->size / 2;
+}
+
+#endif /* PVR_CCCB_H */
diff --git a/drivers/gpu/drm/imagination/pvr_context.c b/drivers/gpu/drm/imagination/pvr_context.c
new file mode 100644
index 000000000000..a87f5a295397
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_context.c
@@ -0,0 +1,337 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#include "pvr_cccb.h"
+#include "pvr_context.h"
+#include "pvr_device.h"
+#include "pvr_drv.h"
+#include "pvr_gem.h"
+#include "pvr_power.h"
+#include "pvr_rogue_fwif.h"
+#include "pvr_rogue_fwif_common.h"
+#include "pvr_rogue_fwif_resetframework.h"
+#include "pvr_stream_defs.h"
+#include "pvr_vm.h"
+
+#include <drm/drm_auth.h>
+#include <drm/drm_managed.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/xarray.h>
+
+static int
+remap_priority(struct pvr_file *pvr_file, s32 uapi_priority,
+ enum pvr_context_priority *priority_out)
+{
+ switch (uapi_priority) {
+ case DRM_PVR_CTX_PRIORITY_LOW:
+ *priority_out = PVR_CTX_PRIORITY_LOW;
+ break;
+ case DRM_PVR_CTX_PRIORITY_NORMAL:
+ *priority_out = PVR_CTX_PRIORITY_MEDIUM;
+ break;
+ case DRM_PVR_CTX_PRIORITY_HIGH:
+ if (!capable(CAP_SYS_NICE) && !drm_is_current_master(from_pvr_file(pvr_file)))
+ return -EACCES;
+ *priority_out = PVR_CTX_PRIORITY_HIGH;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int get_fw_obj_size(enum drm_pvr_ctx_type type)
+{
+ switch (type) {
+ case DRM_PVR_CTX_TYPE_RENDER:
+ return sizeof(struct rogue_fwif_fwrendercontext);
+ case DRM_PVR_CTX_TYPE_COMPUTE:
+ return sizeof(struct rogue_fwif_fwcomputecontext);
+ case DRM_PVR_CTX_TYPE_TRANSFER_FRAG:
+ return sizeof(struct rogue_fwif_fwtransfercontext);
+ }
+
+ return -EINVAL;
+}
+
+static int
+process_static_context_state(struct pvr_device *pvr_dev, const struct pvr_stream_cmd_defs *cmd_defs,
+ u64 stream_user_ptr, u32 stream_size, void *dest)
+{
+ void *stream;
+ int err;
+
+ stream = kzalloc(stream_size, GFP_KERNEL);
+ if (!stream)
+ return -ENOMEM;
+
+ if (copy_from_user(stream, u64_to_user_ptr(stream_user_ptr), stream_size)) {
+ err = -EFAULT;
+ goto err_free;
+ }
+
+ err = pvr_stream_process(pvr_dev, cmd_defs, stream, stream_size, dest);
+ if (err)
+ goto err_free;
+
+ kfree(stream);
+
+ return 0;
+
+err_free:
+ kfree(stream);
+
+ return err;
+}
+
+static int init_render_fw_objs(struct pvr_context *ctx,
+ struct drm_pvr_ioctl_create_context_args *args,
+ void *fw_ctx_map)
+{
+ struct rogue_fwif_static_rendercontext_state *static_rendercontext_state;
+ struct rogue_fwif_fwrendercontext *fw_render_context = fw_ctx_map;
+
+ if (!args->static_context_state_len)
+ return -EINVAL;
+
+ static_rendercontext_state = &fw_render_context->static_render_context_state;
+
+ /* Copy static render context state from userspace. */
+ return process_static_context_state(ctx->pvr_dev,
+ &pvr_static_render_context_state_stream,
+ args->static_context_state,
+ args->static_context_state_len,
+ &static_rendercontext_state->ctxswitch_regs[0]);
+}
+
+static int init_compute_fw_objs(struct pvr_context *ctx,
+ struct drm_pvr_ioctl_create_context_args *args,
+ void *fw_ctx_map)
+{
+ struct rogue_fwif_fwcomputecontext *fw_compute_context = fw_ctx_map;
+ struct rogue_fwif_cdm_registers_cswitch *ctxswitch_regs;
+
+ if (!args->static_context_state_len)
+ return -EINVAL;
+
+ ctxswitch_regs = &fw_compute_context->static_compute_context_state.ctxswitch_regs;
+
+ /* Copy static render context state from userspace. */
+ return process_static_context_state(ctx->pvr_dev,
+ &pvr_static_compute_context_state_stream,
+ args->static_context_state,
+ args->static_context_state_len,
+ ctxswitch_regs);
+}
+
+static int init_transfer_fw_objs(struct pvr_context *ctx,
+ struct drm_pvr_ioctl_create_context_args *args,
+ void *fw_ctx_map)
+{
+ if (args->static_context_state_len)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int init_fw_objs(struct pvr_context *ctx,
+ struct drm_pvr_ioctl_create_context_args *args,
+ void *fw_ctx_map)
+{
+ switch (ctx->type) {
+ case DRM_PVR_CTX_TYPE_RENDER:
+ return init_render_fw_objs(ctx, args, fw_ctx_map);
+ case DRM_PVR_CTX_TYPE_COMPUTE:
+ return init_compute_fw_objs(ctx, args, fw_ctx_map);
+ case DRM_PVR_CTX_TYPE_TRANSFER_FRAG:
+ return init_transfer_fw_objs(ctx, args, fw_ctx_map);
+ }
+
+ return -EINVAL;
+}
+
+static void
+ctx_fw_data_init(void *cpu_ptr, void *priv)
+{
+ struct pvr_context *ctx = priv;
+
+ memcpy(cpu_ptr, ctx->data, ctx->data_size);
+}
+
+/**
+ * pvr_context_create() - Create a context.
+ * @pvr_file: File to attach the created context to.
+ * @args: Context creation arguments.
+ *
+ * Return:
+ * * 0 on success, or
+ * * A negative error code on failure.
+ */
+int pvr_context_create(struct pvr_file *pvr_file, struct drm_pvr_ioctl_create_context_args *args)
+{
+ struct pvr_device *pvr_dev = pvr_file->pvr_dev;
+ struct pvr_context *ctx;
+ int ctx_size;
+ int err;
+
+ /* Context creation flags are currently unused and must be zero. */
+ if (args->flags)
+ return -EINVAL;
+
+ ctx_size = get_fw_obj_size(args->type);
+ if (ctx_size < 0)
+ return ctx_size;
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->data_size = ctx_size;
+ ctx->type = args->type;
+ ctx->flags = args->flags;
+ ctx->pvr_dev = pvr_dev;
+ kref_init(&ctx->ref_count);
+
+ err = remap_priority(pvr_file, args->priority, &ctx->priority);
+ if (err)
+ goto err_free_ctx;
+
+ ctx->vm_ctx = pvr_vm_context_lookup(pvr_file, args->vm_context_handle);
+ if (IS_ERR(ctx->vm_ctx)) {
+ err = PTR_ERR(ctx->vm_ctx);
+ goto err_free_ctx;
+ }
+
+ ctx->data = kzalloc(ctx_size, GFP_KERNEL);
+ if (!ctx->data) {
+ err = -ENOMEM;
+ goto err_put_vm;
+ }
+
+ err = init_fw_objs(ctx, args, ctx->data);
+ if (err)
+ goto err_free_ctx_data;
+
+ err = pvr_fw_object_create(pvr_dev, ctx_size, PVR_BO_FW_FLAGS_DEVICE_UNCACHED,
+ ctx_fw_data_init, ctx, &ctx->fw_obj);
+ if (err)
+ goto err_free_ctx_data;
+
+ err = xa_alloc(&pvr_dev->ctx_ids, &ctx->ctx_id, ctx, xa_limit_32b, GFP_KERNEL);
+ if (err)
+ goto err_destroy_fw_obj;
+
+ err = xa_alloc(&pvr_file->ctx_handles, &args->handle, ctx, xa_limit_32b, GFP_KERNEL);
+ if (err)
+ goto err_release_id;
+
+ return 0;
+
+err_release_id:
+ xa_erase(&pvr_dev->ctx_ids, ctx->ctx_id);
+
+err_destroy_fw_obj:
+ pvr_fw_object_destroy(ctx->fw_obj);
+
+err_free_ctx_data:
+ kfree(ctx->data);
+
+err_put_vm:
+ pvr_vm_context_put(ctx->vm_ctx);
+
+err_free_ctx:
+ kfree(ctx);
+ return err;
+}
+
+static void
+pvr_context_release(struct kref *ref_count)
+{
+ struct pvr_context *ctx =
+ container_of(ref_count, struct pvr_context, ref_count);
+ struct pvr_device *pvr_dev = ctx->pvr_dev;
+
+ xa_erase(&pvr_dev->ctx_ids, ctx->ctx_id);
+ pvr_fw_object_destroy(ctx->fw_obj);
+ kfree(ctx->data);
+ pvr_vm_context_put(ctx->vm_ctx);
+ kfree(ctx);
+}
+
+/**
+ * pvr_context_put() - Release reference on context
+ * @ctx: Target context.
+ */
+void
+pvr_context_put(struct pvr_context *ctx)
+{
+ if (ctx)
+ kref_put(&ctx->ref_count, pvr_context_release);
+}
+
+/**
+ * pvr_context_destroy() - Destroy context
+ * @pvr_file: Pointer to pvr_file structure.
+ * @handle: Userspace context handle.
+ *
+ * Removes context from context list and drops initial reference. Context will
+ * then be destroyed once all outstanding references are dropped.
+ *
+ * Return:
+ * * 0 on success, or
+ * * -%EINVAL if context not in context list.
+ */
+int
+pvr_context_destroy(struct pvr_file *pvr_file, u32 handle)
+{
+ struct pvr_context *ctx = xa_erase(&pvr_file->ctx_handles, handle);
+
+ if (!ctx)
+ return -EINVAL;
+
+ /* Release the reference held by the handle set. */
+ pvr_context_put(ctx);
+
+ return 0;
+}
+
+/**
+ * pvr_destroy_contexts_for_file: Destroy any contexts associated with the given file
+ * @pvr_file: Pointer to pvr_file structure.
+ *
+ * Removes all contexts associated with @pvr_file from the device context list and drops initial
+ * references. Contexts will then be destroyed once all outstanding references are dropped.
+ */
+void pvr_destroy_contexts_for_file(struct pvr_file *pvr_file)
+{
+ struct pvr_context *ctx;
+ unsigned long handle;
+
+ xa_for_each(&pvr_file->ctx_handles, handle, ctx)
+ pvr_context_destroy(pvr_file, handle);
+}
+
+/**
+ * pvr_context_device_init() - Device level initialization for queue related resources.
+ * @pvr_dev: The device to initialize.
+ */
+void pvr_context_device_init(struct pvr_device *pvr_dev)
+{
+ xa_init_flags(&pvr_dev->ctx_ids, XA_FLAGS_ALLOC1);
+}
+
+/**
+ * pvr_context_device_fini() - Device level cleanup for queue related resources.
+ * @pvr_dev: The device to cleanup.
+ */
+void pvr_context_device_fini(struct pvr_device *pvr_dev)
+{
+ WARN_ON(!xa_empty(&pvr_dev->ctx_ids));
+ xa_destroy(&pvr_dev->ctx_ids);
+}
diff --git a/drivers/gpu/drm/imagination/pvr_context.h b/drivers/gpu/drm/imagination/pvr_context.h
new file mode 100644
index 000000000000..fa7115380272
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_context.h
@@ -0,0 +1,161 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#ifndef PVR_CONTEXT_H
+#define PVR_CONTEXT_H
+
+#include <drm/gpu_scheduler.h>
+
+#include <linux/compiler_attributes.h>
+#include <linux/dma-fence.h>
+#include <linux/kref.h>
+#include <linux/types.h>
+#include <linux/xarray.h>
+#include <uapi/drm/pvr_drm.h>
+
+#include "pvr_cccb.h"
+#include "pvr_device.h"
+
+/* Forward declaration from pvr_gem.h. */
+struct pvr_fw_object;
+
+enum pvr_context_priority {
+ PVR_CTX_PRIORITY_LOW = 0,
+ PVR_CTX_PRIORITY_MEDIUM,
+ PVR_CTX_PRIORITY_HIGH,
+};
+
+/**
+ * struct pvr_context - Context data
+ */
+struct pvr_context {
+ /** @ref_count: Refcount for context. */
+ struct kref ref_count;
+
+ /** @pvr_dev: Pointer to owning device. */
+ struct pvr_device *pvr_dev;
+
+ /** @vm_ctx: Pointer to associated VM context. */
+ struct pvr_vm_context *vm_ctx;
+
+ /** @type: Type of context. */
+ enum drm_pvr_ctx_type type;
+
+ /** @flags: Context flags. */
+ u32 flags;
+
+ /** @priority: Context priority*/
+ enum pvr_context_priority priority;
+
+ /** @fw_obj: FW object representing FW-side context data. */
+ struct pvr_fw_object *fw_obj;
+
+ /** @data: Pointer to local copy of FW context data. */
+ void *data;
+
+ /** @data_size: Size of FW context data, in bytes. */
+ u32 data_size;
+
+ /** @ctx_id: FW context ID. */
+ u32 ctx_id;
+};
+
+/**
+ * pvr_context_get() - Take additional reference on context.
+ * @ctx: Context pointer.
+ *
+ * Call pvr_context_put() to release.
+ *
+ * Returns:
+ * * The requested context on success, or
+ * * %NULL if no context pointer passed.
+ */
+static __always_inline struct pvr_context *
+pvr_context_get(struct pvr_context *ctx)
+{
+ if (ctx)
+ kref_get(&ctx->ref_count);
+
+ return ctx;
+}
+
+/**
+ * pvr_context_lookup() - Lookup context pointer from handle and file.
+ * @pvr_file: Pointer to pvr_file structure.
+ * @handle: Context handle.
+ *
+ * Takes reference on context. Call pvr_context_put() to release.
+ *
+ * Return:
+ * * The requested context on success, or
+ * * %NULL on failure (context does not exist, or does not belong to @pvr_file).
+ */
+static __always_inline struct pvr_context *
+pvr_context_lookup(struct pvr_file *pvr_file, u32 handle)
+{
+ struct pvr_context *ctx;
+
+ /* Take the array lock to protect against context removal. */
+ xa_lock(&pvr_file->ctx_handles);
+ ctx = pvr_context_get(xa_load(&pvr_file->ctx_handles, handle));
+ xa_unlock(&pvr_file->ctx_handles);
+
+ return ctx;
+}
+
+/**
+ * pvr_context_lookup_id() - Lookup context pointer from ID.
+ * @pvr_dev: Device pointer.
+ * @id: FW context ID.
+ *
+ * Takes reference on context. Call pvr_context_put() to release.
+ *
+ * Return:
+ * * The requested context on success, or
+ * * %NULL on failure (context does not exist).
+ */
+static __always_inline struct pvr_context *
+pvr_context_lookup_id(struct pvr_device *pvr_dev, u32 id)
+{
+ struct pvr_context *ctx;
+
+ /* Take the array lock to protect against context removal. */
+ xa_lock(&pvr_dev->ctx_ids);
+
+ /* Contexts are removed from the ctx_ids set in the context release path,
+ * meaning the ref_count reached zero before they get removed. We need
+ * to make sure we're not trying to acquire a context that's being
+ * destroyed.
+ */
+ ctx = xa_load(&pvr_dev->ctx_ids, id);
+ if (!kref_get_unless_zero(&ctx->ref_count))
+ ctx = NULL;
+
+ xa_unlock(&pvr_dev->ctx_ids);
+
+ return ctx;
+}
+
+static __always_inline u32
+pvr_context_get_fw_addr(struct pvr_context *ctx)
+{
+ u32 ctx_fw_addr = 0;
+
+ pvr_fw_object_get_fw_addr(ctx->fw_obj, &ctx_fw_addr);
+
+ return ctx_fw_addr;
+}
+
+void pvr_context_put(struct pvr_context *ctx);
+
+int pvr_context_create(struct pvr_file *pvr_file, struct drm_pvr_ioctl_create_context_args *args);
+
+int pvr_context_destroy(struct pvr_file *pvr_file, u32 handle);
+
+void pvr_destroy_contexts_for_file(struct pvr_file *pvr_file);
+
+void pvr_context_device_init(struct pvr_device *pvr_dev);
+
+void pvr_context_device_fini(struct pvr_device *pvr_dev);
+
+#endif /* PVR_CONTEXT_H */
diff --git a/drivers/gpu/drm/imagination/pvr_device.h b/drivers/gpu/drm/imagination/pvr_device.h
index a810b233689b..431b8d8ad579 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 +148,17 @@ 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];
+
+ /**
+ * @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 *".
@@ -249,6 +262,14 @@ 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 *".
diff --git a/drivers/gpu/drm/imagination/pvr_drv.c b/drivers/gpu/drm/imagination/pvr_drv.c
index bd601eced4f2..02c6b8542436 100644
--- a/drivers/gpu/drm/imagination/pvr_drv.c
+++ b/drivers/gpu/drm/imagination/pvr_drv.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0 OR MIT
/* Copyright (c) 2023 Imagination Technologies Ltd. */
+#include "pvr_context.h"
#include "pvr_device.h"
#include "pvr_drv.h"
#include "pvr_free_list.h"
@@ -687,7 +688,19 @@ static int
pvr_ioctl_create_context(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
- return -ENOTTY;
+ struct drm_pvr_ioctl_create_context_args *args = raw_args;
+ struct pvr_file *pvr_file = file->driver_priv;
+ int idx;
+ int ret;
+
+ if (!drm_dev_enter(drm_dev, &idx))
+ return -EIO;
+
+ ret = pvr_context_create(pvr_file, args);
+
+ drm_dev_exit(idx);
+
+ return ret;
}
/**
@@ -707,7 +720,13 @@ static int
pvr_ioctl_destroy_context(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
- return -ENOTTY;
+ struct drm_pvr_ioctl_destroy_context_args *args = raw_args;
+ struct pvr_file *pvr_file = file->driver_priv;
+
+ if (args->_padding_4)
+ return -EINVAL;
+
+ return pvr_context_destroy(pvr_file, args->handle);
}
/**
@@ -1303,6 +1322,7 @@ pvr_drm_driver_open(struct drm_device *drm_dev, struct drm_file *file)
*/
pvr_file->pvr_dev = pvr_dev;
+ xa_init_flags(&pvr_file->ctx_handles, XA_FLAGS_ALLOC1);
xa_init_flags(&pvr_file->free_list_handles, XA_FLAGS_ALLOC1);
xa_init_flags(&pvr_file->hwrt_handles, XA_FLAGS_ALLOC1);
xa_init_flags(&pvr_file->vm_ctx_handles, XA_FLAGS_ALLOC1);
@@ -1332,6 +1352,9 @@ pvr_drm_driver_postclose(__always_unused struct drm_device *drm_dev,
{
struct pvr_file *pvr_file = to_pvr_file(file);
+ /* Kill remaining contexts. */
+ pvr_destroy_contexts_for_file(pvr_file);
+
/* Drop references on any remaining objects. */
pvr_destroy_free_lists_for_file(pvr_file);
pvr_destroy_hwrt_datasets_for_file(pvr_file);
@@ -1377,6 +1400,7 @@ pvr_probe(struct platform_device *plat_dev)
drm_dev = &pvr_dev->base;
platform_set_drvdata(plat_dev, drm_dev);
+ pvr_context_device_init(pvr_dev);
devm_pm_runtime_enable(&plat_dev->dev);
pm_runtime_mark_last_busy(&plat_dev->dev);
@@ -1420,6 +1444,7 @@ pvr_remove(struct platform_device *plat_dev)
drm_dev_unplug(drm_dev);
pvr_device_fini(pvr_dev);
pvr_watchdog_fini(pvr_dev);
+ pvr_context_device_fini(pvr_dev);
return 0;
}
diff --git a/drivers/gpu/drm/imagination/pvr_stream.c b/drivers/gpu/drm/imagination/pvr_stream.c
new file mode 100644
index 000000000000..7603db7e79a7
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_stream.c
@@ -0,0 +1,285 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#include "pvr_device.h"
+#include "pvr_rogue_fwif_stream.h"
+#include "pvr_stream.h"
+
+#include <linux/align.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <uapi/drm/pvr_drm.h>
+
+static __always_inline bool
+stream_def_is_supported(struct pvr_device *pvr_dev, const struct pvr_stream_def *stream_def)
+{
+ if (stream_def->feature == PVR_FEATURE_NONE)
+ return true;
+
+ if (!(stream_def->feature & PVR_FEATURE_NOT) &&
+ pvr_device_has_feature(pvr_dev, stream_def->feature)) {
+ return true;
+ }
+
+ if ((stream_def->feature & PVR_FEATURE_NOT) &&
+ !pvr_device_has_feature(pvr_dev, stream_def->feature & ~PVR_FEATURE_NOT)) {
+ return true;
+ }
+
+ return false;
+}
+
+static int
+pvr_stream_get_data(u8 *stream, u32 *stream_offset, u32 stream_size, u32 data_size, u32 align_size,
+ void *dest)
+{
+ *stream_offset = ALIGN(*stream_offset, align_size);
+
+ if ((*stream_offset + data_size) > stream_size)
+ return -EINVAL;
+
+ memcpy(dest, stream + *stream_offset, data_size);
+
+ (*stream_offset) += data_size;
+
+ return 0;
+}
+
+/**
+ * pvr_stream_process_1() - Process a single stream and fill destination structure
+ * @pvr_dev: Device pointer.
+ * @stream_def: Stream definition.
+ * @nr_entries: Number of entries in &stream_def.
+ * @stream: Pointer to stream.
+ * @stream_offset: Starting offset within stream.
+ * @stream_size: Size of input stream, in bytes.
+ * @dest: Pointer to destination structure.
+ * @dest_size: Size of destination structure.
+ * @stream_offset_out: Pointer to variable to write updated stream offset to. May be NULL.
+ *
+ * Returns:
+ * * 0 on success, or
+ * * -%EINVAL on malformed stream.
+ */
+static int
+pvr_stream_process_1(struct pvr_device *pvr_dev, const struct pvr_stream_def *stream_def,
+ u32 nr_entries, u8 *stream, u32 stream_offset, u32 stream_size,
+ u8 *dest, u32 dest_size, u32 *stream_offset_out)
+{
+ int err = 0;
+ u32 i;
+
+ for (i = 0; i < nr_entries; i++) {
+ if (stream_def[i].offset >= dest_size) {
+ err = -EINVAL;
+ break;
+ }
+
+ if (!stream_def_is_supported(pvr_dev, &stream_def[i]))
+ continue;
+
+ switch (stream_def[i].size) {
+ case PVR_STREAM_SIZE_8:
+ err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u8),
+ sizeof(u8), dest + stream_def[i].offset);
+ if (err)
+ return err;
+ break;
+
+ case PVR_STREAM_SIZE_16:
+ err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u16),
+ sizeof(u16), dest + stream_def[i].offset);
+ if (err)
+ return err;
+ break;
+
+ case PVR_STREAM_SIZE_32:
+ err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u32),
+ sizeof(u32), dest + stream_def[i].offset);
+ if (err)
+ return err;
+ break;
+
+ case PVR_STREAM_SIZE_64:
+ err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u64),
+ sizeof(u64), dest + stream_def[i].offset);
+ if (err)
+ return err;
+ break;
+
+ case PVR_STREAM_SIZE_ARRAY:
+ err = pvr_stream_get_data(stream, &stream_offset, stream_size,
+ stream_def[i].array_size, sizeof(u64),
+ dest + stream_def[i].offset);
+ if (err)
+ return err;
+ break;
+ }
+ }
+
+ if (stream_offset_out)
+ *stream_offset_out = stream_offset;
+
+ return 0;
+}
+
+static int
+pvr_stream_process_ext_stream(struct pvr_device *pvr_dev,
+ const struct pvr_stream_cmd_defs *cmd_defs, void *ext_stream,
+ u32 stream_offset, u32 ext_stream_size, void *dest)
+{
+ u32 musthave_masks[PVR_STREAM_EXTHDR_TYPE_MAX];
+ u32 ext_header;
+ int err = 0;
+ u32 i;
+
+ /* Copy "must have" mask from device. We clear this as we process the stream. */
+ memcpy(musthave_masks, pvr_dev->stream_musthave_quirks[cmd_defs->type],
+ sizeof(musthave_masks));
+
+ do {
+ const struct pvr_stream_ext_header *header;
+ u32 type;
+ u32 data;
+
+ err = pvr_stream_get_data(ext_stream, &stream_offset, ext_stream_size, sizeof(u32),
+ sizeof(ext_header), &ext_header);
+ if (err)
+ return err;
+
+ type = (ext_header & PVR_STREAM_EXTHDR_TYPE_MASK) >> PVR_STREAM_EXTHDR_TYPE_SHIFT;
+ data = ext_header & PVR_STREAM_EXTHDR_DATA_MASK;
+
+ if (type >= cmd_defs->ext_nr_headers)
+ return -EINVAL;
+
+ header = &cmd_defs->ext_headers[type];
+ if (data & ~header->valid_mask)
+ return -EINVAL;
+
+ musthave_masks[type] &= ~data;
+
+ for (i = 0; i < header->ext_streams_num; i++) {
+ const struct pvr_stream_ext_def *ext_def = &header->ext_streams[i];
+
+ if (!(ext_header & ext_def->header_mask))
+ continue;
+
+ if (!pvr_device_has_uapi_quirk(pvr_dev, ext_def->quirk))
+ return -EINVAL;
+
+ err = pvr_stream_process_1(pvr_dev, ext_def->stream, ext_def->stream_len,
+ ext_stream, stream_offset,
+ ext_stream_size, dest,
+ cmd_defs->dest_size, &stream_offset);
+ if (err)
+ return err;
+ }
+ } while (ext_header & PVR_STREAM_EXTHDR_CONTINUATION);
+
+ /*
+ * Verify that "must have" mask is now zero. If it isn't then one of the "must have" quirks
+ * for this command was not present.
+ */
+ for (i = 0; i < cmd_defs->ext_nr_headers; i++) {
+ if (musthave_masks[i])
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * pvr_stream_process() - Build FW structure from stream
+ * @pvr_dev: Device pointer.
+ * @cmd_defs: Stream definition.
+ * @stream: Pointer to command stream.
+ * @stream_size: Size of command stream, in bytes.
+ * @dest_out: Pointer to destination buffer.
+ *
+ * Caller is responsible for freeing the output structure.
+ *
+ * Returns:
+ * * 0 on success,
+ * * -%ENOMEM on out of memory, or
+ * * -%EINVAL on malformed stream.
+ */
+int
+pvr_stream_process(struct pvr_device *pvr_dev, const struct pvr_stream_cmd_defs *cmd_defs,
+ void *stream, u32 stream_size, void *dest_out)
+{
+ u32 stream_offset = 0;
+ u32 main_stream_len;
+ u32 padding;
+ int err;
+
+ if (!stream || !stream_size)
+ return -EINVAL;
+
+ err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u32),
+ sizeof(u32), &main_stream_len);
+ if (err)
+ return err;
+
+ /*
+ * u32 after stream length is padding to ensure u64 alignment, but may be used for expansion
+ * in the future. Verify it's zero.
+ */
+ err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u32),
+ sizeof(u32), &padding);
+ if (err)
+ return err;
+
+ if (main_stream_len < stream_offset || main_stream_len > stream_size || padding)
+ return -EINVAL;
+
+ err = pvr_stream_process_1(pvr_dev, cmd_defs->main_stream, cmd_defs->main_stream_len,
+ stream, stream_offset, main_stream_len, dest_out,
+ cmd_defs->dest_size, &stream_offset);
+ if (err)
+ return err;
+
+ if (stream_offset < stream_size) {
+ err = pvr_stream_process_ext_stream(pvr_dev, cmd_defs, stream, stream_offset,
+ stream_size, dest_out);
+ if (err)
+ return err;
+ } else {
+ u32 i;
+
+ /*
+ * If we don't have an extension stream then there must not be any "must have"
+ * quirks for this command.
+ */
+ for (i = 0; i < cmd_defs->ext_nr_headers; i++) {
+ if (pvr_dev->stream_musthave_quirks[cmd_defs->type][i])
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * pvr_stream_create_musthave_masks() - Create "must have" masks for streams based on current device
+ * quirks
+ * @pvr_dev: Device pointer.
+ */
+void
+pvr_stream_create_musthave_masks(struct pvr_device *pvr_dev)
+{
+ memset(pvr_dev->stream_musthave_quirks, 0, sizeof(pvr_dev->stream_musthave_quirks));
+
+ if (pvr_device_has_uapi_quirk(pvr_dev, 47217))
+ pvr_dev->stream_musthave_quirks[PVR_STREAM_TYPE_FRAG][0] |=
+ PVR_STREAM_EXTHDR_FRAG0_BRN47217;
+
+ if (pvr_device_has_uapi_quirk(pvr_dev, 49927)) {
+ pvr_dev->stream_musthave_quirks[PVR_STREAM_TYPE_GEOM][0] |=
+ PVR_STREAM_EXTHDR_GEOM0_BRN49927;
+ pvr_dev->stream_musthave_quirks[PVR_STREAM_TYPE_FRAG][0] |=
+ PVR_STREAM_EXTHDR_FRAG0_BRN49927;
+ pvr_dev->stream_musthave_quirks[PVR_STREAM_TYPE_COMPUTE][0] |=
+ PVR_STREAM_EXTHDR_COMPUTE0_BRN49927;
+ }
+}
diff --git a/drivers/gpu/drm/imagination/pvr_stream.h b/drivers/gpu/drm/imagination/pvr_stream.h
new file mode 100644
index 000000000000..ecc5edfb7bf4
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_stream.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#ifndef PVR_STREAM_H
+#define PVR_STREAM_H
+
+#include <linux/bits.h>
+#include <linux/limits.h>
+#include <linux/types.h>
+
+struct pvr_device;
+
+struct pvr_job;
+
+enum pvr_stream_type {
+ PVR_STREAM_TYPE_GEOM = 0,
+ PVR_STREAM_TYPE_FRAG,
+ PVR_STREAM_TYPE_COMPUTE,
+ PVR_STREAM_TYPE_TRANSFER,
+ PVR_STREAM_TYPE_STATIC_RENDER_CONTEXT,
+ PVR_STREAM_TYPE_STATIC_COMPUTE_CONTEXT,
+
+ PVR_STREAM_TYPE_MAX
+};
+
+enum pvr_stream_size {
+ PVR_STREAM_SIZE_8 = 0,
+ PVR_STREAM_SIZE_16,
+ PVR_STREAM_SIZE_32,
+ PVR_STREAM_SIZE_64,
+ PVR_STREAM_SIZE_ARRAY,
+};
+
+#define PVR_FEATURE_NOT BIT(31)
+#define PVR_FEATURE_NONE U32_MAX
+
+struct pvr_stream_def {
+ u32 offset;
+ enum pvr_stream_size size;
+ u32 array_size;
+ u32 feature;
+};
+
+struct pvr_stream_ext_def {
+ const struct pvr_stream_def *stream;
+ u32 stream_len;
+ u32 header_mask;
+ u32 quirk;
+};
+
+struct pvr_stream_ext_header {
+ const struct pvr_stream_ext_def *ext_streams;
+ u32 ext_streams_num;
+ u32 valid_mask;
+};
+
+struct pvr_stream_cmd_defs {
+ enum pvr_stream_type type;
+
+ const struct pvr_stream_def *main_stream;
+ u32 main_stream_len;
+
+ u32 ext_nr_headers;
+ const struct pvr_stream_ext_header *ext_headers;
+
+ size_t dest_size;
+};
+
+int
+pvr_stream_process(struct pvr_device *pvr_dev, const struct pvr_stream_cmd_defs *cmd_defs,
+ void *stream, u32 stream_size, void *dest_out);
+void
+pvr_stream_create_musthave_masks(struct pvr_device *pvr_dev);
+
+#endif /* PVR_STREAM_H */
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..3c646e25accf
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_stream_defs.c
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0 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),
+};
diff --git a/drivers/gpu/drm/imagination/pvr_stream_defs.h b/drivers/gpu/drm/imagination/pvr_stream_defs.h
new file mode 100644
index 000000000000..7e0ecfa12030
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_stream_defs.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#ifndef PVR_STREAM_DEFS_H
+#define PVR_STREAM_DEFS_H
+
+#include "pvr_stream.h"
+
+extern const struct pvr_stream_cmd_defs pvr_cmd_geom_stream;
+extern const struct pvr_stream_cmd_defs pvr_cmd_frag_stream;
+extern const struct pvr_stream_cmd_defs pvr_cmd_compute_stream;
+extern const struct pvr_stream_cmd_defs pvr_cmd_transfer_stream;
+extern const struct pvr_stream_cmd_defs pvr_static_render_context_state_stream;
+extern const struct pvr_stream_cmd_defs pvr_static_compute_context_state_stream;
+
+#endif /* PVR_STREAM_DEFS_H */
--
2.41.0