[Intel-gfx] [RFC-v6 05/21] drm/i915/pxp: Func to send hardware session termination

[Huang, Sean Z]

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.

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_cmd.c | 156 +++++++++++++++++++++++
 drivers/gpu/drm/i915/pxp/intel_pxp_cmd.h |  18 +++
 3 files changed, 175 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 0710cc522f38..2da904cda49f 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -258,6 +258,7 @@ 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_cmd.c b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c
new file mode 100644
index 000000000000..e531ea9f3cdc
--- /dev/null
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c
@@ -0,0 +1,156 @@
+// 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(&gt->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(&gt->i915->drm, "Failed to i915_gem_object_pin_map()\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	memcpy(cmd, cmd_buf, cmd_size_in_dw * 4);
+
+	if (drm_debug_enabled(DRM_UT_DRIVER)) {
+		print_hex_dump(KERN_DEBUG, "cmd binaries:",
+			       DUMP_PREFIX_OFFSET, 4, 4, cmd, cmd_size_in_dw * 4, true);
+	}
+
+	i915_gem_object_unpin_map(pool->obj);
+
+	batch = i915_vma_instance(pool->obj, ce->vm, NULL);
+	if (IS_ERR(batch)) {
+		drm_err(&gt->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;
+	bool is_engine_pm_get = false;
+	bool is_batch_vma_pin = false;
+	bool is_skip_req_on_err = false;
+	bool is_engine_get_pool = false;
+	struct intel_gt_buffer_pool_node *pool = NULL;
+	struct intel_gt *gt = container_of(pxp, struct intel_gt, pxp);
+
+	if (!HAS_ENGINE(gt, VCS0) ||
+	    !gt->engine[VCS0]->kernel_context) {
+		err = -EINVAL;
+		goto end;
+	}
+
+	if (!cmd || (cmd_size_in_dw * 4) > PAGE_SIZE) {
+		drm_err(&gt->i915->drm, "Failed to %s bad params\n", __func__);
+		return -EINVAL;
+	}
+
+	ce = gt->engine[VCS0]->kernel_context;
+
+	intel_engine_pm_get(ce->engine);
+	is_engine_pm_get = true;
+
+	pool = intel_gt_get_buffer_pool(gt, PAGE_SIZE);
+	if (IS_ERR(pool)) {
+		drm_err(&gt->i915->drm, "Failed to intel_engine_get_pool()\n");
+		goto end;
+	}
+	is_engine_get_pool = true;
+
+	batch = intel_pxp_cmd_get_batch(pxp, ce, pool, cmd, cmd_size_in_dw);
+	if (IS_ERR(batch)) {
+		drm_err(&gt->i915->drm, "Failed to intel_pxp_cmd_get_batch()\n");
+		goto end;
+	}
+
+	err = i915_vma_pin(batch, 0, 0, PIN_USER);
+	if (err) {
+		drm_err(&gt->i915->drm, "Failed to i915_vma_pin()\n");
+		goto end;
+	}
+	is_batch_vma_pin = true;
+
+	rq = intel_context_create_request(ce);
+	if (IS_ERR(rq)) {
+		drm_err(&gt->i915->drm, "Failed to intel_context_create_request()\n");
+		goto end;
+	}
+	is_skip_req_on_err = true;
+
+	err = intel_gt_buffer_pool_mark_active(pool, rq);
+	if (err) {
+		drm_err(&gt->i915->drm, "Failed to intel_engine_pool_mark_active()\n");
+		goto end;
+	}
+
+	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) {
+		drm_err(&gt->i915->drm, "Failed to i915_request_await_object()\n");
+		goto end;
+	}
+
+	if (ce->engine->emit_init_breadcrumb) {
+		err = ce->engine->emit_init_breadcrumb(rq);
+		if (err) {
+			drm_err(&gt->i915->drm, "Failed to emit_init_breadcrumb()\n");
+			goto end;
+		}
+	}
+
+	err = ce->engine->emit_bb_start(rq, batch->node.start,
+		batch->node.size, 0);
+	if (err) {
+		drm_err(&gt->i915->drm, "Failed to emit_bb_start()\n");
+		goto end;
+	}
+
+	i915_request_add(rq);
+
+end:
+	if (unlikely(err) && is_skip_req_on_err)
+		i915_request_set_error_once(rq, err);
+
+	if (is_batch_vma_pin)
+		i915_vma_unpin(batch);
+
+	if (is_engine_get_pool)
+		intel_gt_buffer_pool_put(pool);
+
+	if (is_engine_pm_get)
+		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__ */
-- 
2.17.1