diff options
| -rw-r--r-- | drivers/gpu/drm/xe/xe_sriov_pf_sysfs.c | 84 |
1 files changed, 82 insertions, 2 deletions
diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_sysfs.c b/drivers/gpu/drm/xe/xe_sriov_pf_sysfs.c index 19724a28fb33..0b1b4606ac76 100644 --- a/drivers/gpu/drm/xe/xe_sriov_pf_sysfs.c +++ b/drivers/gpu/drm/xe/xe_sriov_pf_sysfs.c @@ -17,6 +17,23 @@ #include "xe_sriov_pf_sysfs.h" #include "xe_sriov_printk.h" +static int emit_choice(char *buf, int choice, const char * const *array, size_t size) +{ + int pos = 0; + int n; + + for (n = 0; n < size; n++) { + pos += sysfs_emit_at(buf, pos, "%s%s%s%s", + n ? " " : "", + n == choice ? "[" : "", + array[n], + n == choice ? "]" : ""); + } + pos += sysfs_emit_at(buf, pos, "\n"); + + return pos; +} + /* * /sys/bus/pci/drivers/xe/BDF/ * : @@ -30,12 +47,14 @@ * │ ├── ... * │ └── profile * │ ├── exec_quantum_ms - * │ └── preempt_timeout_us + * │ ├── preempt_timeout_us + * │ └── sched_priority * ├── vf1/ * │ ├── ... * │ └── profile * │ ├── exec_quantum_ms - * │ └── preempt_timeout_us + * │ ├── preempt_timeout_us + * │ └── sched_priority * ├── vf2/ * : * └── vfN/ @@ -115,6 +134,12 @@ static const char * const sched_priority_names[] = { [GUC_SCHED_PRIORITY_HIGH] = "high", }; +static bool sched_priority_change_allowed(unsigned int vfid) +{ + /* As of today GuC FW allows to selectively change only the PF priority. */ + return vfid == PFID; +} + static bool sched_priority_high_allowed(unsigned int vfid) { /* As of today GuC FW allows to select 'high' priority only for the PF. */ @@ -199,15 +224,70 @@ static XE_SRIOV_VF_ATTR(NAME) DEFINE_SIMPLE_PROVISIONING_SRIOV_VF_ATTR(exec_quantum_ms, eq, u32, "%u\n"); DEFINE_SIMPLE_PROVISIONING_SRIOV_VF_ATTR(preempt_timeout_us, pt, u32, "%u\n"); +static ssize_t xe_sriov_vf_attr_sched_priority_show(struct xe_device *xe, unsigned int vfid, + char *buf) +{ + size_t num_priorities = ARRAY_SIZE(sched_priority_names); + u32 priority; + int err; + + err = xe_sriov_pf_provision_query_vf_priority(xe, vfid, &priority); + if (err) + return err; + + if (!sched_priority_high_allowed(vfid)) + num_priorities--; + + xe_assert(xe, priority < num_priorities); + return emit_choice(buf, priority, sched_priority_names, num_priorities); +} + +static ssize_t xe_sriov_vf_attr_sched_priority_store(struct xe_device *xe, unsigned int vfid, + const char *buf, size_t count) +{ + size_t num_priorities = ARRAY_SIZE(sched_priority_names); + int match; + int err; + + if (!sched_priority_change_allowed(vfid)) + return -EOPNOTSUPP; + + if (!sched_priority_high_allowed(vfid)) + num_priorities--; + + match = __sysfs_match_string(sched_priority_names, num_priorities, buf); + if (match < 0) + return -EINVAL; + + err = xe_sriov_pf_provision_apply_vf_priority(xe, vfid, match); + return err ?: count; +} + +static XE_SRIOV_VF_ATTR(sched_priority); + static struct attribute *profile_vf_attrs[] = { &xe_sriov_vf_attr_exec_quantum_ms.attr, &xe_sriov_vf_attr_preempt_timeout_us.attr, + &xe_sriov_vf_attr_sched_priority.attr, NULL }; +static umode_t profile_vf_attr_is_visible(struct kobject *kobj, + struct attribute *attr, int index) +{ + struct xe_sriov_kobj *vkobj = to_xe_sriov_kobj(kobj); + + if (attr == &xe_sriov_vf_attr_sched_priority.attr && + !sched_priority_change_allowed(vkobj->vfid)) + return attr->mode & 0444; + + return attr->mode; +} + static const struct attribute_group profile_vf_attr_group = { .name = "profile", .attrs = profile_vf_attrs, + .is_visible = profile_vf_attr_is_visible, }; static const struct attribute_group *xe_sriov_vf_attr_groups[] = { |