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@xxxxxxxxx>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c | 159 +++++++++++++++++++++++
drivers/gpu/drm/i915/pxp/intel_pxp_cmd.h | 18 +++
3 files changed, 178 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 2c84f75b41da..abe52189986a 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -259,6 +259,7 @@ 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..e86d914e7629
--- /dev/null
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c
@@ -0,0 +1,159 @@
+// 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);
+
+ 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(>->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(>->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(>->i915->drm, "Failed to intel_engine_get_pool()\n");
+ err = PTR_ERR(pool);
+ 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(>->i915->drm, "Failed to intel_pxp_cmd_get_batch()\n");
+ err = PTR_ERR(batch);
+ goto end;
+ }
+
+ err = i915_vma_pin(batch, 0, 0, PIN_USER);
+ if (err) {
+ drm_err(>->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(>->i915->drm, "Failed to intel_context_create_request()\n");
+ err = PTR_ERR(rq);
+ goto end;
+ }
+ is_skip_req_on_err = true;
+
+ err = intel_gt_buffer_pool_mark_active(pool, rq);
+ if (err) {
+ drm_err(>->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(>->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(>->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(>->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
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