ring_id_to_context_switch_event(execlist->ring_id));
}
-int emulate_execlist_ctx_schedule_out(
+static int emulate_execlist_ctx_schedule_out(
struct intel_vgpu_execlist *execlist,
struct execlist_ctx_descriptor_format *ctx)
{
return &execlist->slot[status.execlist_write_pointer];
}
-int emulate_execlist_schedule_in(struct intel_vgpu_execlist *execlist,
+static int emulate_execlist_schedule_in(struct intel_vgpu_execlist *execlist,
struct execlist_ctx_descriptor_format ctx[2])
{
struct intel_vgpu_execlist_slot *running = execlist->running_slot;
return 0;
}
+static void free_workload(struct intel_vgpu_workload *workload)
+{
+ intel_vgpu_unpin_mm(workload->shadow_mm);
+ intel_gvt_mm_unreference(workload->shadow_mm);
+ kmem_cache_free(workload->vgpu->workloads, workload);
+}
+
+#define get_desc_from_elsp_dwords(ed, i) \
+ ((struct execlist_ctx_descriptor_format *)&((ed)->data[i * 2]))
+
+static int prepare_execlist_workload(struct intel_vgpu_workload *workload)
+{
+ struct intel_vgpu *vgpu = workload->vgpu;
+ struct execlist_ctx_descriptor_format ctx[2];
+ int ring_id = workload->ring_id;
+
+ intel_vgpu_pin_mm(workload->shadow_mm);
+ intel_vgpu_sync_oos_pages(workload->vgpu);
+ intel_vgpu_flush_post_shadow(workload->vgpu);
+ if (!workload->emulate_schedule_in)
+ return 0;
+
+ ctx[0] = *get_desc_from_elsp_dwords(&workload->elsp_dwords, 1);
+ ctx[1] = *get_desc_from_elsp_dwords(&workload->elsp_dwords, 0);
+
+ return emulate_execlist_schedule_in(&vgpu->execlist[ring_id], ctx);
+}
+
+static int complete_execlist_workload(struct intel_vgpu_workload *workload)
+{
+ struct intel_vgpu *vgpu = workload->vgpu;
+ struct intel_vgpu_execlist *execlist =
+ &vgpu->execlist[workload->ring_id];
+ struct intel_vgpu_workload *next_workload;
+ struct list_head *next = workload_q_head(vgpu, workload->ring_id)->next;
+ bool lite_restore = false;
+ int ret;
+
+ gvt_dbg_el("complete workload %p status %d\n", workload,
+ workload->status);
+
+ if (workload->status)
+ goto out;
+
+ if (!list_empty(workload_q_head(vgpu, workload->ring_id))) {
+ struct execlist_ctx_descriptor_format *this_desc, *next_desc;
+
+ next_workload = container_of(next,
+ struct intel_vgpu_workload, list);
+ this_desc = &workload->ctx_desc;
+ next_desc = &next_workload->ctx_desc;
+
+ lite_restore = same_context(this_desc, next_desc);
+ }
+
+ if (lite_restore) {
+ gvt_dbg_el("next context == current - no schedule-out\n");
+ free_workload(workload);
+ return 0;
+ }
+
+ ret = emulate_execlist_ctx_schedule_out(execlist, &workload->ctx_desc);
+ if (ret)
+ goto err;
+out:
+ free_workload(workload);
+ return 0;
+err:
+ free_workload(workload);
+ return ret;
+}
+
+#define RING_CTX_OFF(x) \
+ offsetof(struct execlist_ring_context, x)
+
+static void read_guest_pdps(struct intel_vgpu *vgpu,
+ u64 ring_context_gpa, u32 pdp[8])
+{
+ u64 gpa;
+ int i;
+
+ gpa = ring_context_gpa + RING_CTX_OFF(pdp3_UDW.val);
+
+ for (i = 0; i < 8; i++)
+ intel_gvt_hypervisor_read_gpa(vgpu,
+ gpa + i * 8, &pdp[7 - i], 4);
+}
+
+static int prepare_mm(struct intel_vgpu_workload *workload)
+{
+ struct execlist_ctx_descriptor_format *desc = &workload->ctx_desc;
+ struct intel_vgpu_mm *mm;
+ int page_table_level;
+ u32 pdp[8];
+
+ if (desc->addressing_mode == 1) { /* legacy 32-bit */
+ page_table_level = 3;
+ } else if (desc->addressing_mode == 3) { /* legacy 64 bit */
+ page_table_level = 4;
+ } else {
+ gvt_err("Advanced Context mode(SVM) is not supported!\n");
+ return -EINVAL;
+ }
+
+ read_guest_pdps(workload->vgpu, workload->ring_context_gpa, pdp);
+
+ mm = intel_vgpu_find_ppgtt_mm(workload->vgpu, page_table_level, pdp);
+ if (mm) {
+ intel_gvt_mm_reference(mm);
+ } else {
+
+ mm = intel_vgpu_create_mm(workload->vgpu, INTEL_GVT_MM_PPGTT,
+ pdp, page_table_level, 0);
+ if (IS_ERR(mm)) {
+ gvt_err("fail to create mm object.\n");
+ return PTR_ERR(mm);
+ }
+ }
+ workload->shadow_mm = mm;
+ return 0;
+}
+
+#define get_last_workload(q) \
+ (list_empty(q) ? NULL : container_of(q->prev, \
+ struct intel_vgpu_workload, list))
+
+bool submit_context(struct intel_vgpu *vgpu, int ring_id,
+ struct execlist_ctx_descriptor_format *desc,
+ bool emulate_schedule_in)
+{
+ struct list_head *q = workload_q_head(vgpu, ring_id);
+ struct intel_vgpu_workload *last_workload = get_last_workload(q);
+ struct intel_vgpu_workload *workload = NULL;
+ u64 ring_context_gpa;
+ u32 head, tail, start, ctl, ctx_ctl;
+ int ret;
+
+ ring_context_gpa = intel_vgpu_gma_to_gpa(vgpu->gtt.ggtt_mm,
+ (u32)((desc->lrca + 1) << GTT_PAGE_SHIFT));
+ if (ring_context_gpa == INTEL_GVT_INVALID_ADDR) {
+ gvt_err("invalid guest context LRCA: %x\n", desc->lrca);
+ return -EINVAL;
+ }
+
+ intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
+ RING_CTX_OFF(ring_header.val), &head, 4);
+
+ intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
+ RING_CTX_OFF(ring_tail.val), &tail, 4);
+
+ head &= RB_HEAD_OFF_MASK;
+ tail &= RB_TAIL_OFF_MASK;
+
+ if (last_workload && same_context(&last_workload->ctx_desc, desc)) {
+ gvt_dbg_el("ring id %d cur workload == last\n", ring_id);
+ gvt_dbg_el("ctx head %x real head %lx\n", head,
+ last_workload->rb_tail);
+ /*
+ * cannot use guest context head pointer here,
+ * as it might not be updated at this time
+ */
+ head = last_workload->rb_tail;
+ }
+
+ gvt_dbg_el("ring id %d begin a new workload\n", ring_id);
+
+ workload = kmem_cache_zalloc(vgpu->workloads, GFP_KERNEL);
+ if (!workload)
+ return -ENOMEM;
+
+ /* record some ring buffer register values for scan and shadow */
+ intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
+ RING_CTX_OFF(rb_start.val), &start, 4);
+ intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
+ RING_CTX_OFF(rb_ctrl.val), &ctl, 4);
+ intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
+ RING_CTX_OFF(ctx_ctrl.val), &ctx_ctl, 4);
+
+ INIT_LIST_HEAD(&workload->list);
+
+ init_waitqueue_head(&workload->shadow_ctx_status_wq);
+ atomic_set(&workload->shadow_ctx_active, 0);
+
+ workload->vgpu = vgpu;
+ workload->ring_id = ring_id;
+ workload->ctx_desc = *desc;
+ workload->ring_context_gpa = ring_context_gpa;
+ workload->rb_head = head;
+ workload->rb_tail = tail;
+ workload->rb_start = start;
+ workload->rb_ctl = ctl;
+ workload->prepare = prepare_execlist_workload;
+ workload->complete = complete_execlist_workload;
+ workload->status = -EINPROGRESS;
+ workload->emulate_schedule_in = emulate_schedule_in;
+
+ if (emulate_schedule_in)
+ memcpy(&workload->elsp_dwords,
+ &vgpu->execlist[ring_id].elsp_dwords,
+ sizeof(workload->elsp_dwords));
+
+ gvt_dbg_el("workload %p ring id %d head %x tail %x start %x ctl %x\n",
+ workload, ring_id, head, tail, start, ctl);
+
+ gvt_dbg_el("workload %p emulate schedule_in %d\n", workload,
+ emulate_schedule_in);
+
+ ret = prepare_mm(workload);
+ if (ret) {
+ kmem_cache_free(vgpu->workloads, workload);
+ return ret;
+ }
+
+ queue_workload(workload);
+ return 0;
+}
+
+int intel_vgpu_submit_execlist(struct intel_vgpu *vgpu, int ring_id)
+{
+ struct intel_vgpu_execlist *execlist = &vgpu->execlist[ring_id];
+ struct execlist_ctx_descriptor_format *desc[2], valid_desc[2];
+ unsigned long valid_desc_bitmap = 0;
+ bool emulate_schedule_in = true;
+ int ret;
+ int i;
+
+ memset(valid_desc, 0, sizeof(valid_desc));
+
+ desc[0] = get_desc_from_elsp_dwords(&execlist->elsp_dwords, 1);
+ desc[1] = get_desc_from_elsp_dwords(&execlist->elsp_dwords, 0);
+
+ for (i = 0; i < 2; i++) {
+ if (!desc[i]->valid)
+ continue;
+
+ if (!desc[i]->privilege_access) {
+ gvt_err("vgpu%d: unexpected GGTT elsp submission\n",
+ vgpu->id);
+ return -EINVAL;
+ }
+
+ /* TODO: add another guest context checks here. */
+ set_bit(i, &valid_desc_bitmap);
+ valid_desc[i] = *desc[i];
+ }
+
+ if (!valid_desc_bitmap) {
+ gvt_err("vgpu%d: no valid desc in a elsp submission\n",
+ vgpu->id);
+ return -EINVAL;
+ }
+
+ if (!test_bit(0, (void *)&valid_desc_bitmap) &&
+ test_bit(1, (void *)&valid_desc_bitmap)) {
+ gvt_err("vgpu%d: weird elsp submission, desc 0 is not valid\n",
+ vgpu->id);
+ return -EINVAL;
+ }
+
+ /* submit workload */
+ for_each_set_bit(i, (void *)&valid_desc_bitmap, 2) {
+ ret = submit_context(vgpu, ring_id, &valid_desc[i],
+ emulate_schedule_in);
+ if (ret) {
+ gvt_err("vgpu%d: fail to schedule workload\n",
+ vgpu->id);
+ return ret;
+ }
+ emulate_schedule_in = false;
+ }
+ return 0;
+}
+
static void init_vgpu_execlist(struct intel_vgpu *vgpu, int ring_id)
{
struct intel_vgpu_execlist *execlist = &vgpu->execlist[ring_id];
vgpu_vreg(vgpu, ctx_status_ptr_reg) = ctx_status_ptr.dw;
}
+void intel_vgpu_clean_execlist(struct intel_vgpu *vgpu)
+{
+ kmem_cache_destroy(vgpu->workloads);
+}
+
int intel_vgpu_init_execlist(struct intel_vgpu *vgpu)
{
int i;
/* each ring has a virtual execlist engine */
- for (i = 0; i < I915_NUM_ENGINES; i++)
+ for (i = 0; i < I915_NUM_ENGINES; i++) {
init_vgpu_execlist(vgpu, i);
+ INIT_LIST_HEAD(&vgpu->workload_q_head[i]);
+ }
+
+ vgpu->workloads = kmem_cache_create("gvt-g vgpu workload",
+ sizeof(struct intel_vgpu_workload), 0,
+ SLAB_HWCACHE_ALIGN,
+ NULL);
+
+ if (!vgpu->workloads)
+ return -ENOMEM;
return 0;
}
return 0;
}
+static int render_mmio_to_ring_id(struct intel_gvt *gvt, unsigned int reg)
+{
+ int i;
+
+ reg &= ~GENMASK(11, 0);
+ for (i = 0; i < I915_NUM_ENGINES; i++) {
+ if (gvt->dev_priv->engine[i].mmio_base == reg)
+ return i;
+ }
+ return -1;
+}
+
#define offset_to_fence_num(offset) \
((offset - i915_mmio_reg_offset(FENCE_REG_GEN6_LO(0))) >> 3)
return intel_vgpu_default_mmio_read(vgpu, offset, p_data, bytes);
}
+static int elsp_mmio_write(struct intel_vgpu *vgpu, unsigned int offset,
+ void *p_data, unsigned int bytes)
+{
+ int ring_id = render_mmio_to_ring_id(vgpu->gvt, offset);
+ struct intel_vgpu_execlist *execlist;
+ u32 data = *(u32 *)p_data;
+ int ret;
+
+ if (WARN_ON(ring_id < 0))
+ return -EINVAL;
+
+ execlist = &vgpu->execlist[ring_id];
+
+ execlist->elsp_dwords.data[execlist->elsp_dwords.index] = data;
+ if (execlist->elsp_dwords.index == 3)
+ ret = intel_vgpu_submit_execlist(vgpu, ring_id);
+
+ ++execlist->elsp_dwords.index;
+ execlist->elsp_dwords.index &= 0x3;
+ return 0;
+}
+
#define MMIO_F(reg, s, f, am, rm, d, r, w) do { \
ret = new_mmio_info(gvt, INTEL_GVT_MMIO_OFFSET(reg), \
f, s, am, rm, d, r, w); \
MMIO_RING_D(RING_ACTHD_UDW, D_BDW_PLUS);
#define RING_REG(base) (base + 0x230)
- MMIO_RING_DFH(RING_REG, D_BDW_PLUS, 0, NULL, NULL);
- MMIO_DH(RING_REG(GEN8_BSD2_RING_BASE), D_BDW_PLUS, NULL, NULL);
+ MMIO_RING_DFH(RING_REG, D_BDW_PLUS, 0, NULL, elsp_mmio_write);
+ MMIO_DH(RING_REG(GEN8_BSD2_RING_BASE), D_BDW_PLUS, NULL, elsp_mmio_write);
#undef RING_REG
#define RING_REG(base) (base + 0x234)
--- /dev/null
+/*
+ * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _GVT_SCHEDULER_H_
+#define _GVT_SCHEDULER_H_
+
+struct intel_gvt_workload_scheduler {
+ struct list_head workload_q_head[I915_NUM_ENGINES];
+};
+
+struct intel_vgpu_workload {
+ struct intel_vgpu *vgpu;
+ int ring_id;
+ struct drm_i915_gem_request *req;
+ /* if this workload has been dispatched to i915? */
+ bool dispatched;
+ int status;
+
+ struct intel_vgpu_mm *shadow_mm;
+
+ /* different submission model may need different handler */
+ int (*prepare)(struct intel_vgpu_workload *);
+ int (*complete)(struct intel_vgpu_workload *);
+ struct list_head list;
+
+ /* execlist context information */
+ struct execlist_ctx_descriptor_format ctx_desc;
+ struct execlist_ring_context *ring_context;
+ unsigned long rb_head, rb_tail, rb_ctl, rb_start;
+ struct intel_vgpu_elsp_dwords elsp_dwords;
+ bool emulate_schedule_in;
+ atomic_t shadow_ctx_active;
+ wait_queue_head_t shadow_ctx_status_wq;
+ u64 ring_context_gpa;
+};
+
+#define workload_q_head(vgpu, ring_id) \
+ (&(vgpu->workload_q_head[ring_id]))
+
+#define queue_workload(workload) \
+ list_add_tail(&workload->list, \
+ workload_q_head(workload->vgpu, workload->ring_id))
+
+#endif
projects / linux.git / commitdiff