From: Ping Gao Date: Wed, 29 Mar 2017 16:36:37 +0000 (+0800) Subject: drm/i915/gvt: define weight according to vGPU type X-Git-Tag: v5.15~11060^2~4^2~11^2~12 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bc90d097ae144fab1f789f8523b621de7125c6a8;p=platform%2Fkernel%2Flinux-starfive.git drm/i915/gvt: define weight according to vGPU type The weight defines proportional control of physical GPU resource shared between vGPUs. So far the weight is tied to a specific vGPU type, i.e when creating multiple vGPUs with different types, they will inherit different weights. e.g. The weight of type GVTg_V5_2 is 8, the weight of type GVTg_V5_4 is 4, so vGPU of type GVTg_V5_2 has double vGPU resource of vGPU type GVTg_V5_4. TODO: allow user control the weight setting in the future. Signed-off-by: Ping Gao Reviewed-by: Kevin Tian Signed-off-by: Zhenyu Wang --- diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h index fe7f5ae8..0631f64 100644 --- a/drivers/gpu/drm/i915/gvt/gvt.h +++ b/drivers/gpu/drm/i915/gvt/gvt.h @@ -151,6 +151,7 @@ struct intel_vgpu { bool failsafe; bool resetting; void *sched_data; + struct vgpu_sched_ctl sched_ctl; struct intel_vgpu_fence fence; struct intel_vgpu_gm gm; @@ -220,6 +221,7 @@ struct intel_vgpu_type { unsigned int low_gm_size; unsigned int high_gm_size; unsigned int fence; + unsigned int weight; enum intel_vgpu_edid resolution; }; @@ -328,6 +330,8 @@ struct intel_vgpu_creation_params { __u64 resolution; __s32 primary; __u64 vgpu_id; + + __u32 weight; }; int intel_vgpu_alloc_resource(struct intel_vgpu *vgpu, diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 65bcf60..5f55d89 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -295,10 +295,12 @@ static ssize_t description_show(struct kobject *kobj, struct device *dev, return 0; return sprintf(buf, "low_gm_size: %dMB\nhigh_gm_size: %dMB\n" - "fence: %d\nresolution: %s\n", + "fence: %d\nresolution: %s\n" + "weight: %d\n", BYTES_TO_MB(type->low_gm_size), BYTES_TO_MB(type->high_gm_size), - type->fence, vgpu_edid_str(type->resolution)); + type->fence, vgpu_edid_str(type->resolution), + type->weight); } static MDEV_TYPE_ATTR_RO(available_instances); diff --git a/drivers/gpu/drm/i915/gvt/sched_policy.c b/drivers/gpu/drm/i915/gvt/sched_policy.c index 15e0c3b..5aa7a25 100644 --- a/drivers/gpu/drm/i915/gvt/sched_policy.c +++ b/drivers/gpu/drm/i915/gvt/sched_policy.c @@ -237,6 +237,7 @@ static int tbs_sched_init_vgpu(struct intel_vgpu *vgpu) if (!data) return -ENOMEM; + data->sched_ctl.weight = vgpu->sched_ctl.weight; data->vgpu = vgpu; INIT_LIST_HEAD(&data->lru_list); diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c index d8d1286..36c107e 100644 --- a/drivers/gpu/drm/i915/gvt/vgpu.c +++ b/drivers/gpu/drm/i915/gvt/vgpu.c @@ -64,18 +64,28 @@ void populate_pvinfo_page(struct intel_vgpu *vgpu) WARN_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE); } +#define VGPU_MAX_WEIGHT 16 +#define VGPU_WEIGHT(vgpu_num) \ + (VGPU_MAX_WEIGHT / (vgpu_num)) + static struct { unsigned int low_mm; unsigned int high_mm; unsigned int fence; + + /* A vGPU with a weight of 8 will get twice as much GPU as a vGPU + * with a weight of 4 on a contended host, different vGPU type has + * different weight set. Legal weights range from 1 to 16. + */ + unsigned int weight; enum intel_vgpu_edid edid; char *name; } vgpu_types[] = { /* Fixed vGPU type table */ - { MB_TO_BYTES(64), MB_TO_BYTES(384), 4, GVT_EDID_1024_768, "8" }, - { MB_TO_BYTES(128), MB_TO_BYTES(512), 4, GVT_EDID_1920_1200, "4" }, - { MB_TO_BYTES(256), MB_TO_BYTES(1024), 4, GVT_EDID_1920_1200, "2" }, - { MB_TO_BYTES(512), MB_TO_BYTES(2048), 4, GVT_EDID_1920_1200, "1" }, + { MB_TO_BYTES(64), MB_TO_BYTES(384), 4, VGPU_WEIGHT(8), GVT_EDID_1024_768, "8" }, + { MB_TO_BYTES(128), MB_TO_BYTES(512), 4, VGPU_WEIGHT(4), GVT_EDID_1920_1200, "4" }, + { MB_TO_BYTES(256), MB_TO_BYTES(1024), 4, VGPU_WEIGHT(2), GVT_EDID_1920_1200, "2" }, + { MB_TO_BYTES(512), MB_TO_BYTES(2048), 4, VGPU_WEIGHT(1), GVT_EDID_1920_1200, "1" }, }; /** @@ -120,6 +130,12 @@ int intel_gvt_init_vgpu_types(struct intel_gvt *gvt) gvt->types[i].low_gm_size = vgpu_types[i].low_mm; gvt->types[i].high_gm_size = vgpu_types[i].high_mm; gvt->types[i].fence = vgpu_types[i].fence; + + if (vgpu_types[i].weight < 1 || + vgpu_types[i].weight > VGPU_MAX_WEIGHT) + return -EINVAL; + + gvt->types[i].weight = vgpu_types[i].weight; gvt->types[i].resolution = vgpu_types[i].edid; gvt->types[i].avail_instance = min(low_avail / vgpu_types[i].low_mm, high_avail / vgpu_types[i].high_mm); @@ -131,11 +147,12 @@ int intel_gvt_init_vgpu_types(struct intel_gvt *gvt) sprintf(gvt->types[i].name, "GVTg_V5_%s", vgpu_types[i].name); - gvt_dbg_core("type[%d]: %s avail %u low %u high %u fence %u res %s\n", + gvt_dbg_core("type[%d]: %s avail %u low %u high %u fence %u weight %u res %s\n", i, gvt->types[i].name, gvt->types[i].avail_instance, gvt->types[i].low_gm_size, gvt->types[i].high_gm_size, gvt->types[i].fence, + gvt->types[i].weight, vgpu_edid_str(gvt->types[i].resolution)); } @@ -239,6 +256,7 @@ static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt, vgpu->id = ret; vgpu->handle = param->handle; vgpu->gvt = gvt; + vgpu->sched_ctl.weight = param->weight; bitmap_zero(vgpu->tlb_handle_pending, I915_NUM_ENGINES); intel_vgpu_init_cfg_space(vgpu, param->primary); @@ -325,6 +343,7 @@ struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt, param.low_gm_sz = type->low_gm_size; param.high_gm_sz = type->high_gm_size; param.fence_sz = type->fence; + param.weight = type->weight; param.resolution = type->resolution; /* XXX current param based on MB */