blob: db906117db6d69140b733b4224281d2612250f1f [file] [log] [blame]
// SPDX-License-Identifier: MIT
/*
* Copyright © 2021 Intel Corporation
*/
#include "xe_execlist.h"
#include <drm/drm_managed.h>
#include "instructions/xe_mi_commands.h"
#include "regs/xe_engine_regs.h"
#include "regs/xe_gt_regs.h"
#include "regs/xe_lrc_layout.h"
#include "xe_assert.h"
#include "xe_bo.h"
#include "xe_device.h"
#include "xe_exec_queue.h"
#include "xe_gt.h"
#include "xe_hw_fence.h"
#include "xe_lrc.h"
#include "xe_macros.h"
#include "xe_mmio.h"
#include "xe_mocs.h"
#include "xe_ring_ops_types.h"
#include "xe_sched_job.h"
#define XE_EXECLIST_HANG_LIMIT 1
#define SW_CTX_ID_SHIFT 37
#define SW_CTX_ID_WIDTH 11
#define XEHP_SW_CTX_ID_SHIFT 39
#define XEHP_SW_CTX_ID_WIDTH 16
#define SW_CTX_ID \
GENMASK_ULL(SW_CTX_ID_WIDTH + SW_CTX_ID_SHIFT - 1, \
SW_CTX_ID_SHIFT)
#define XEHP_SW_CTX_ID \
GENMASK_ULL(XEHP_SW_CTX_ID_WIDTH + XEHP_SW_CTX_ID_SHIFT - 1, \
XEHP_SW_CTX_ID_SHIFT)
static void __start_lrc(struct xe_hw_engine *hwe, struct xe_lrc *lrc,
u32 ctx_id)
{
struct xe_gt *gt = hwe->gt;
struct xe_device *xe = gt_to_xe(gt);
u64 lrc_desc;
lrc_desc = xe_lrc_descriptor(lrc);
if (GRAPHICS_VERx100(xe) >= 1250) {
xe_gt_assert(hwe->gt, FIELD_FIT(XEHP_SW_CTX_ID, ctx_id));
lrc_desc |= FIELD_PREP(XEHP_SW_CTX_ID, ctx_id);
} else {
xe_gt_assert(hwe->gt, FIELD_FIT(SW_CTX_ID, ctx_id));
lrc_desc |= FIELD_PREP(SW_CTX_ID, ctx_id);
}
if (hwe->class == XE_ENGINE_CLASS_COMPUTE)
xe_mmio_write32(hwe->gt, RCU_MODE,
_MASKED_BIT_ENABLE(RCU_MODE_CCS_ENABLE));
xe_lrc_write_ctx_reg(lrc, CTX_RING_TAIL, lrc->ring.tail);
lrc->ring.old_tail = lrc->ring.tail;
/*
* Make sure the context image is complete before we submit it to HW.
*
* Ostensibly, writes (including the WCB) should be flushed prior to
* an uncached write such as our mmio register access, the empirical
* evidence (esp. on Braswell) suggests that the WC write into memory
* may not be visible to the HW prior to the completion of the UC
* register write and that we may begin execution from the context
* before its image is complete leading to invalid PD chasing.
*/
wmb();
xe_mmio_write32(gt, RING_HWS_PGA(hwe->mmio_base),
xe_bo_ggtt_addr(hwe->hwsp));
xe_mmio_read32(gt, RING_HWS_PGA(hwe->mmio_base));
xe_mmio_write32(gt, RING_MODE(hwe->mmio_base),
_MASKED_BIT_ENABLE(GFX_DISABLE_LEGACY_MODE));
xe_mmio_write32(gt, RING_EXECLIST_SQ_CONTENTS_LO(hwe->mmio_base),
lower_32_bits(lrc_desc));
xe_mmio_write32(gt, RING_EXECLIST_SQ_CONTENTS_HI(hwe->mmio_base),
upper_32_bits(lrc_desc));
xe_mmio_write32(gt, RING_EXECLIST_CONTROL(hwe->mmio_base),
EL_CTRL_LOAD);
}
static void __xe_execlist_port_start(struct xe_execlist_port *port,
struct xe_execlist_exec_queue *exl)
{
struct xe_device *xe = gt_to_xe(port->hwe->gt);
int max_ctx = FIELD_MAX(SW_CTX_ID);
if (GRAPHICS_VERx100(xe) >= 1250)
max_ctx = FIELD_MAX(XEHP_SW_CTX_ID);
xe_execlist_port_assert_held(port);
if (port->running_exl != exl || !exl->has_run) {
port->last_ctx_id++;
/* 0 is reserved for the kernel context */
if (port->last_ctx_id > max_ctx)
port->last_ctx_id = 1;
}
__start_lrc(port->hwe, exl->q->lrc[0], port->last_ctx_id);
port->running_exl = exl;
exl->has_run = true;
}
static void __xe_execlist_port_idle(struct xe_execlist_port *port)
{
u32 noop[2] = { MI_NOOP, MI_NOOP };
xe_execlist_port_assert_held(port);
if (!port->running_exl)
return;
xe_lrc_write_ring(port->hwe->kernel_lrc, noop, sizeof(noop));
__start_lrc(port->hwe, port->hwe->kernel_lrc, 0);
port->running_exl = NULL;
}
static bool xe_execlist_is_idle(struct xe_execlist_exec_queue *exl)
{
struct xe_lrc *lrc = exl->q->lrc[0];
return lrc->ring.tail == lrc->ring.old_tail;
}
static void __xe_execlist_port_start_next_active(struct xe_execlist_port *port)
{
struct xe_execlist_exec_queue *exl = NULL;
int i;
xe_execlist_port_assert_held(port);
for (i = ARRAY_SIZE(port->active) - 1; i >= 0; i--) {
while (!list_empty(&port->active[i])) {
exl = list_first_entry(&port->active[i],
struct xe_execlist_exec_queue,
active_link);
list_del(&exl->active_link);
if (xe_execlist_is_idle(exl)) {
exl->active_priority = XE_EXEC_QUEUE_PRIORITY_UNSET;
continue;
}
list_add_tail(&exl->active_link, &port->active[i]);
__xe_execlist_port_start(port, exl);
return;
}
}
__xe_execlist_port_idle(port);
}
static u64 read_execlist_status(struct xe_hw_engine *hwe)
{
struct xe_gt *gt = hwe->gt;
u32 hi, lo;
lo = xe_mmio_read32(gt, RING_EXECLIST_STATUS_LO(hwe->mmio_base));
hi = xe_mmio_read32(gt, RING_EXECLIST_STATUS_HI(hwe->mmio_base));
return lo | (u64)hi << 32;
}
static void xe_execlist_port_irq_handler_locked(struct xe_execlist_port *port)
{
u64 status;
xe_execlist_port_assert_held(port);
status = read_execlist_status(port->hwe);
if (status & BIT(7))
return;
__xe_execlist_port_start_next_active(port);
}
static void xe_execlist_port_irq_handler(struct xe_hw_engine *hwe,
u16 intr_vec)
{
struct xe_execlist_port *port = hwe->exl_port;
spin_lock(&port->lock);
xe_execlist_port_irq_handler_locked(port);
spin_unlock(&port->lock);
}
static void xe_execlist_port_wake_locked(struct xe_execlist_port *port,
enum xe_exec_queue_priority priority)
{
xe_execlist_port_assert_held(port);
if (port->running_exl && port->running_exl->active_priority >= priority)
return;
__xe_execlist_port_start_next_active(port);
}
static void xe_execlist_make_active(struct xe_execlist_exec_queue *exl)
{
struct xe_execlist_port *port = exl->port;
enum xe_exec_queue_priority priority = exl->q->sched_props.priority;
XE_WARN_ON(priority == XE_EXEC_QUEUE_PRIORITY_UNSET);
XE_WARN_ON(priority < 0);
XE_WARN_ON(priority >= ARRAY_SIZE(exl->port->active));
spin_lock_irq(&port->lock);
if (exl->active_priority != priority &&
exl->active_priority != XE_EXEC_QUEUE_PRIORITY_UNSET) {
/* Priority changed, move it to the right list */
list_del(&exl->active_link);
exl->active_priority = XE_EXEC_QUEUE_PRIORITY_UNSET;
}
if (exl->active_priority == XE_EXEC_QUEUE_PRIORITY_UNSET) {
exl->active_priority = priority;
list_add_tail(&exl->active_link, &port->active[priority]);
}
xe_execlist_port_wake_locked(exl->port, priority);
spin_unlock_irq(&port->lock);
}
static void xe_execlist_port_irq_fail_timer(struct timer_list *timer)
{
struct xe_execlist_port *port =
container_of(timer, struct xe_execlist_port, irq_fail);
spin_lock_irq(&port->lock);
xe_execlist_port_irq_handler_locked(port);
spin_unlock_irq(&port->lock);
port->irq_fail.expires = jiffies + msecs_to_jiffies(1000);
add_timer(&port->irq_fail);
}
struct xe_execlist_port *xe_execlist_port_create(struct xe_device *xe,
struct xe_hw_engine *hwe)
{
struct drm_device *drm = &xe->drm;
struct xe_execlist_port *port;
int i;
port = drmm_kzalloc(drm, sizeof(*port), GFP_KERNEL);
if (!port)
return ERR_PTR(-ENOMEM);
port->hwe = hwe;
spin_lock_init(&port->lock);
for (i = 0; i < ARRAY_SIZE(port->active); i++)
INIT_LIST_HEAD(&port->active[i]);
port->last_ctx_id = 1;
port->running_exl = NULL;
hwe->irq_handler = xe_execlist_port_irq_handler;
/* TODO: Fix the interrupt code so it doesn't race like mad */
timer_setup(&port->irq_fail, xe_execlist_port_irq_fail_timer, 0);
port->irq_fail.expires = jiffies + msecs_to_jiffies(1000);
add_timer(&port->irq_fail);
return port;
}
void xe_execlist_port_destroy(struct xe_execlist_port *port)
{
del_timer(&port->irq_fail);
/* Prevent an interrupt while we're destroying */
spin_lock_irq(&gt_to_xe(port->hwe->gt)->irq.lock);
port->hwe->irq_handler = NULL;
spin_unlock_irq(&gt_to_xe(port->hwe->gt)->irq.lock);
}
static struct dma_fence *
execlist_run_job(struct drm_sched_job *drm_job)
{
struct xe_sched_job *job = to_xe_sched_job(drm_job);
struct xe_exec_queue *q = job->q;
struct xe_execlist_exec_queue *exl = job->q->execlist;
q->ring_ops->emit_job(job);
xe_execlist_make_active(exl);
return dma_fence_get(job->fence);
}
static void execlist_job_free(struct drm_sched_job *drm_job)
{
struct xe_sched_job *job = to_xe_sched_job(drm_job);
xe_exec_queue_update_run_ticks(job->q);
xe_sched_job_put(job);
}
static const struct drm_sched_backend_ops drm_sched_ops = {
.run_job = execlist_run_job,
.free_job = execlist_job_free,
};
static int execlist_exec_queue_init(struct xe_exec_queue *q)
{
struct drm_gpu_scheduler *sched;
struct xe_execlist_exec_queue *exl;
struct xe_device *xe = gt_to_xe(q->gt);
int err;
xe_assert(xe, !xe_device_uc_enabled(xe));
drm_info(&xe->drm, "Enabling execlist submission (GuC submission disabled)\n");
exl = kzalloc(sizeof(*exl), GFP_KERNEL);
if (!exl)
return -ENOMEM;
exl->q = q;
err = drm_sched_init(&exl->sched, &drm_sched_ops, NULL, 1,
q->lrc[0]->ring.size / MAX_JOB_SIZE_BYTES,
XE_SCHED_HANG_LIMIT, XE_SCHED_JOB_TIMEOUT,
NULL, NULL, q->hwe->name,
gt_to_xe(q->gt)->drm.dev);
if (err)
goto err_free;
sched = &exl->sched;
err = drm_sched_entity_init(&exl->entity, 0, &sched, 1, NULL);
if (err)
goto err_sched;
exl->port = q->hwe->exl_port;
exl->has_run = false;
exl->active_priority = XE_EXEC_QUEUE_PRIORITY_UNSET;
q->execlist = exl;
q->entity = &exl->entity;
xe_exec_queue_assign_name(q, ffs(q->logical_mask) - 1);
return 0;
err_sched:
drm_sched_fini(&exl->sched);
err_free:
kfree(exl);
return err;
}
static void execlist_exec_queue_fini_async(struct work_struct *w)
{
struct xe_execlist_exec_queue *ee =
container_of(w, struct xe_execlist_exec_queue, fini_async);
struct xe_exec_queue *q = ee->q;
struct xe_execlist_exec_queue *exl = q->execlist;
struct xe_device *xe = gt_to_xe(q->gt);
unsigned long flags;
xe_assert(xe, !xe_device_uc_enabled(xe));
spin_lock_irqsave(&exl->port->lock, flags);
if (WARN_ON(exl->active_priority != XE_EXEC_QUEUE_PRIORITY_UNSET))
list_del(&exl->active_link);
spin_unlock_irqrestore(&exl->port->lock, flags);
drm_sched_entity_fini(&exl->entity);
drm_sched_fini(&exl->sched);
kfree(exl);
xe_exec_queue_fini(q);
}
static void execlist_exec_queue_kill(struct xe_exec_queue *q)
{
/* NIY */
}
static void execlist_exec_queue_fini(struct xe_exec_queue *q)
{
INIT_WORK(&q->execlist->fini_async, execlist_exec_queue_fini_async);
queue_work(system_unbound_wq, &q->execlist->fini_async);
}
static int execlist_exec_queue_set_priority(struct xe_exec_queue *q,
enum xe_exec_queue_priority priority)
{
/* NIY */
return 0;
}
static int execlist_exec_queue_set_timeslice(struct xe_exec_queue *q, u32 timeslice_us)
{
/* NIY */
return 0;
}
static int execlist_exec_queue_set_preempt_timeout(struct xe_exec_queue *q,
u32 preempt_timeout_us)
{
/* NIY */
return 0;
}
static int execlist_exec_queue_suspend(struct xe_exec_queue *q)
{
/* NIY */
return 0;
}
static void execlist_exec_queue_suspend_wait(struct xe_exec_queue *q)
{
/* NIY */
}
static void execlist_exec_queue_resume(struct xe_exec_queue *q)
{
/* NIY */
}
static bool execlist_exec_queue_reset_status(struct xe_exec_queue *q)
{
/* NIY */
return false;
}
static const struct xe_exec_queue_ops execlist_exec_queue_ops = {
.init = execlist_exec_queue_init,
.kill = execlist_exec_queue_kill,
.fini = execlist_exec_queue_fini,
.set_priority = execlist_exec_queue_set_priority,
.set_timeslice = execlist_exec_queue_set_timeslice,
.set_preempt_timeout = execlist_exec_queue_set_preempt_timeout,
.suspend = execlist_exec_queue_suspend,
.suspend_wait = execlist_exec_queue_suspend_wait,
.resume = execlist_exec_queue_resume,
.reset_status = execlist_exec_queue_reset_status,
};
int xe_execlist_init(struct xe_gt *gt)
{
/* GuC submission enabled, nothing to do */
if (xe_device_uc_enabled(gt_to_xe(gt)))
return 0;
gt->exec_queue_ops = &execlist_exec_queue_ops;
return 0;
}