[Intel-gfx] [RFC-v21 05/13] drm/i915/pxp: Func to send hardware session termination
Huang, Sean Z
sean.z.huang at intel.com
Mon Jan 18 06:07:22 UTC 2021
Implement the functions to allow PXP to send a GPU command, in
order to terminate the hardware session, so hardware can recycle
this session slot for the next usage.
rev21:
In intel_pxp_cmd.c:
- Remove the debug print as well as print_hex_dump()
- Should call i915_gem_object_flush_map() before unpin map
- Using "goto label" instead of bool such as is_engine_pm_get
- We should always return the error if any, instead of skip
with i915_request_set_error_once()
Signed-off-by: Huang, Sean Z <sean.z.huang at intel.com>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/pxp/intel_pxp.c | 13 +++
drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c | 124 +++++++++++++++++++++
drivers/gpu/drm/i915/pxp/intel_pxp_cmd.h | 18 +++
drivers/gpu/drm/i915/pxp/intel_pxp_types.h | 4 +
5 files changed, 160 insertions(+)
create mode 100644 drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c
create mode 100644 drivers/gpu/drm/i915/pxp/intel_pxp_cmd.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index e3b7f6b5dadb..c931ef5e8a85 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -269,6 +269,7 @@ i915-y += i915_perf.o
i915-$(CONFIG_DRM_I915_PXP) += \
pxp/intel_pxp.o \
pxp/intel_pxp_arb.o \
+ pxp/intel_pxp_cmd.o \
pxp/intel_pxp_context.o \
pxp/intel_pxp_tee.o
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index 4f033907564a..f71677a84405 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -17,10 +17,23 @@
void intel_pxp_init(struct intel_pxp *pxp)
{
struct intel_gt *gt = container_of(pxp, struct intel_gt, pxp);
+ int i;
if (INTEL_GEN(gt->i915) < 12)
return;
+ /* Find the first VCS engine present */
+ for (i = 0; i < I915_MAX_VCS; i++) {
+ if (HAS_ENGINE(gt, _VCS(i))) {
+ pxp->vcs_engine = gt->engine[_VCS(i)];
+ break;
+ }
+ }
+ if (!pxp->vcs_engine) {
+ drm_err(>->i915->drm, "Could not find a VCS engine\n");
+ return;
+ }
+
intel_pxp_ctx_init(&pxp->ctx);
if (INTEL_GEN(gt->i915) == 12)
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c
new file mode 100644
index 000000000000..6898b8826302
--- /dev/null
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright(c) 2020, Intel Corporation. All rights reserved.
+ */
+
+#include "intel_pxp_cmd.h"
+#include "i915_drv.h"
+#include "gt/intel_context.h"
+#include "gt/intel_engine_pm.h"
+
+struct i915_vma *intel_pxp_cmd_get_batch(struct intel_pxp *pxp,
+ struct intel_context *ce,
+ struct intel_gt_buffer_pool_node *pool,
+ u32 *cmd_buf, int cmd_size_in_dw)
+{
+ struct i915_vma *batch = ERR_PTR(-EINVAL);
+ struct intel_gt *gt = container_of(pxp, struct intel_gt, pxp);
+ u32 *cmd;
+
+ if (!ce || !ce->engine || !cmd_buf)
+ return ERR_PTR(-EINVAL);
+
+ if (cmd_size_in_dw * 4 > PAGE_SIZE) {
+ drm_err(>->i915->drm, "Failed to %s, invalid cmd_size_id_dw=[%d]\n",
+ __func__, cmd_size_in_dw);
+ return ERR_PTR(-EINVAL);
+ }
+
+ cmd = i915_gem_object_pin_map(pool->obj, I915_MAP_FORCE_WC);
+ if (IS_ERR(cmd)) {
+ drm_err(>->i915->drm, "Failed to i915_gem_object_pin_map()\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ memcpy(cmd, cmd_buf, cmd_size_in_dw * 4);
+
+ i915_gem_object_flush_map(pool->obj);
+ i915_gem_object_unpin_map(pool->obj);
+
+ batch = i915_vma_instance(pool->obj, ce->vm, NULL);
+ if (IS_ERR(batch)) {
+ drm_err(>->i915->drm, "Failed to i915_vma_instance()\n");
+ return batch;
+ }
+
+ return batch;
+}
+
+int intel_pxp_cmd_submit(struct intel_pxp *pxp, u32 *cmd, int cmd_size_in_dw)
+{
+ int err = -EINVAL;
+ struct i915_vma *batch;
+ struct i915_request *rq;
+ struct intel_context *ce = NULL;
+ struct intel_gt_buffer_pool_node *pool = NULL;
+ struct intel_gt *gt = container_of(pxp, struct intel_gt, pxp);
+ int size = cmd_size_in_dw * 4;
+
+ ce = pxp->vcs_engine->kernel_context;
+ if (!ce)
+ return -EINVAL;
+
+ if (!cmd || cmd_size_in_dw == 0)
+ return -EINVAL;
+
+ intel_engine_pm_get(ce->engine);
+
+ size = round_up(size, PAGE_SIZE);
+ pool = intel_gt_get_buffer_pool(gt, size);
+ if (IS_ERR(pool)) {
+ err = PTR_ERR(pool);
+ goto out_engine_pm_put;
+ }
+
+ batch = intel_pxp_cmd_get_batch(pxp, ce, pool, cmd, cmd_size_in_dw);
+ if (IS_ERR(batch)) {
+ err = PTR_ERR(batch);
+ goto out_engine_pool_put;
+ }
+
+ err = i915_vma_pin(batch, 0, 0, PIN_USER);
+ if (err)
+ goto out_engine_pool_put;
+
+ rq = intel_context_create_request(ce);
+ if (IS_ERR(rq)) {
+ err = PTR_ERR(rq);
+ goto out_vma_unpin;
+ }
+
+ err = intel_gt_buffer_pool_mark_active(pool, rq);
+ if (err)
+ goto out_vma_unpin;
+
+ i915_vma_lock(batch);
+ err = i915_request_await_object(rq, batch->obj, false);
+ if (!err)
+ err = i915_vma_move_to_active(batch, rq, 0);
+ i915_vma_unlock(batch);
+ if (err)
+ goto out_vma_unpin;
+
+ if (ce->engine->emit_init_breadcrumb) {
+ err = ce->engine->emit_init_breadcrumb(rq);
+ if (err)
+ goto out_vma_unpin;
+ }
+
+ err = ce->engine->emit_bb_start(rq, batch->node.start,
+ batch->node.size, 0);
+ if (err)
+ goto out_vma_unpin;
+
+ i915_request_add(rq);
+
+out_vma_unpin:
+ i915_vma_unpin(batch);
+out_engine_pool_put:
+ intel_gt_buffer_pool_put(pool);
+out_engine_pm_put:
+ intel_engine_pm_put(ce->engine);
+
+ return err;
+}
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.h b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.h
new file mode 100644
index 000000000000..d04463962421
--- /dev/null
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright(c) 2020, Intel Corporation. All rights reserved.
+ */
+
+#ifndef __INTEL_PXP_CMD_H__
+#define __INTEL_PXP_CMD_H__
+
+#include "gt/intel_gt_buffer_pool.h"
+#include "intel_pxp.h"
+
+struct i915_vma *intel_pxp_cmd_get_batch(struct intel_pxp *pxp,
+ struct intel_context *ce,
+ struct intel_gt_buffer_pool_node *pool,
+ u32 *cmd_buf, int cmd_size_in_dw);
+
+int intel_pxp_cmd_submit(struct intel_pxp *pxp, u32 *cmd, int cmd_size_in_dw);
+#endif /* __INTEL_PXP_SM_H__ */
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
index e2bd320302c2..19d43b43e483 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
@@ -8,6 +8,8 @@
#include <linux/mutex.h>
+struct intel_engine_cs;
+
/* struct pxp_context - Represents combined view of driver and logical HW states. */
struct pxp_context {
/** @mutex: mutex to protect the pxp context */
@@ -22,6 +24,8 @@ struct pxp_context {
struct intel_pxp {
struct pxp_context ctx;
+
+ struct intel_engine_cs *vcs_engine;
};
#endif /* __INTEL_PXP_TYPES_H__ */
--
2.17.1
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