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drm/i915/execlists: Track begin/end of execlists submission sequences

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We would like to start doing some bookkeeping at the beginning, between
contexts and at the end of execlists submission. We already mark the
beginning and end using EXECLISTS_ACTIVE_USER, to provide an indication
when the HW is idle. This give us a pair of sequence points we can then
expand on for further bookkeeping.

v2: Refactor guc submission to share the same begin/end.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Francisco Jerez <currojerez@riseup.net>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180331130626.10712-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-03-31 14:06:26 +01:00
parent 1f901d59a5
commit f260520790
3 changed files with 63 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/gpu/drm/i915/intel_guc_submission.c
View File

@ -728,7 +728,7 @@ done:
execlists->first = rb;
if (submit) {
port_assign(port, last);
execlists_set_active(execlists, EXECLISTS_ACTIVE_USER);
execlists_user_begin(execlists, execlists->port);
guc_submit(engine);
}
@ -748,17 +748,20 @@ static void guc_submission_tasklet(unsigned long data)
struct execlist_port *port = execlists->port;
struct i915_request *rq;
rq = port_request(&port[0]);
rq = port_request(port);
while (rq && i915_request_completed(rq)) {
trace_i915_request_out(rq);
i915_request_put(rq);
execlists_port_complete(execlists, port);
rq = port_request(&port[0]);
port = execlists_port_complete(execlists, port);
if (port_isset(port)) {
execlists_user_begin(execlists, port);
rq = port_request(port);
} else {
execlists_user_end(execlists);
rq = NULL;
}
}
if (!rq)
execlists_clear_active(execlists, EXECLISTS_ACTIVE_USER);
if (execlists_is_active(execlists, EXECLISTS_ACTIVE_PREEMPT) &&
intel_read_status_page(engine, I915_GEM_HWS_PREEMPT_INDEX) ==

50
drivers/gpu/drm/i915/intel_lrc.c
View File

@ -374,6 +374,19 @@ execlists_context_status_change(struct i915_request *rq, unsigned long status)
status, rq);
}
inline void
execlists_user_begin(struct intel_engine_execlists *execlists,
const struct execlist_port *port)
{
execlists_set_active_once(execlists, EXECLISTS_ACTIVE_USER);
}
inline void
execlists_user_end(struct intel_engine_execlists *execlists)
{
execlists_clear_active(execlists, EXECLISTS_ACTIVE_USER);
}
static inline void
execlists_context_schedule_in(struct i915_request *rq)
{
@ -711,7 +724,7 @@ unlock:
spin_unlock_irq(&engine->timeline->lock);
if (submit) {
execlists_set_active(execlists, EXECLISTS_ACTIVE_USER);
execlists_user_begin(execlists, execlists->port);
execlists_submit_ports(engine);
}
@ -742,7 +755,7 @@ execlists_cancel_port_requests(struct intel_engine_execlists * const execlists)
port++;
}
execlists_clear_active(execlists, EXECLISTS_ACTIVE_USER);
execlists_user_end(execlists);
}
static void clear_gtiir(struct intel_engine_cs *engine)
@ -873,7 +886,7 @@ static void execlists_submission_tasklet(unsigned long data)
{
struct intel_engine_cs * const engine = (struct intel_engine_cs *)data;
struct intel_engine_execlists * const execlists = &engine->execlists;
struct execlist_port * const port = execlists->port;
struct execlist_port *port = execlists->port;
struct drm_i915_private *dev_priv = engine->i915;
bool fw = false;
@ -1012,10 +1025,28 @@ static void execlists_submission_tasklet(unsigned long data)
GEM_BUG_ON(count == 0);
if (--count == 0) {
/*
* On the final event corresponding to the
* submission of this context, we expect either
* an element-switch event or a completion
* event (and on completion, the active-idle
* marker). No more preemptions, lite-restore
* or otherwise.
*/
GEM_BUG_ON(status & GEN8_CTX_STATUS_PREEMPTED);
GEM_BUG_ON(port_isset(&port[1]) &&
!(status & GEN8_CTX_STATUS_ELEMENT_SWITCH));
GEM_BUG_ON(!port_isset(&port[1]) &&
!(status & GEN8_CTX_STATUS_ACTIVE_IDLE));
/*
* We rely on the hardware being strongly
* ordered, that the breadcrumb write is
* coherent (visible from the CPU) before the
* user interrupt and CSB is processed.
*/
GEM_BUG_ON(!i915_request_completed(rq));
execlists_context_schedule_out(rq);
trace_i915_request_out(rq);
i915_request_put(rq);
@ -1023,17 +1054,14 @@ static void execlists_submission_tasklet(unsigned long data)
GEM_TRACE("%s completed ctx=%d\n",
engine->name, port->context_id);
execlists_port_complete(execlists, port);
port = execlists_port_complete(execlists, port);
if (port_isset(port))
execlists_user_begin(execlists, port);
else
execlists_user_end(execlists);
} else {
port_set(port, port_pack(rq, count));
}
/* After the final element, the hw should be idle */
GEM_BUG_ON(port_count(port) == 0 &&
!(status & GEN8_CTX_STATUS_ACTIVE_IDLE));
if (port_count(port) == 0)
execlists_clear_active(execlists,
EXECLISTS_ACTIVE_USER);
}
if (head != execlists->csb_head) {

15
drivers/gpu/drm/i915/intel_ringbuffer.h
View File

@ -638,6 +638,13 @@ execlists_set_active(struct intel_engine_execlists *execlists,
__set_bit(bit, (unsigned long *)&execlists->active);
}
static inline bool
execlists_set_active_once(struct intel_engine_execlists *execlists,
unsigned int bit)
{
return !__test_and_set_bit(bit, (unsigned long *)&execlists->active);
}
static inline void
execlists_clear_active(struct intel_engine_execlists *execlists,
unsigned int bit)
@ -652,6 +659,10 @@ execlists_is_active(const struct intel_engine_execlists *execlists,
return test_bit(bit, (unsigned long *)&execlists->active);
}
void execlists_user_begin(struct intel_engine_execlists *execlists,
const struct execlist_port *port);
void execlists_user_end(struct intel_engine_execlists *execlists);
void
execlists_cancel_port_requests(struct intel_engine_execlists * const execlists);
@ -664,7 +675,7 @@ execlists_num_ports(const struct intel_engine_execlists * const execlists)
return execlists->port_mask + 1;
}
static inline void
static inline struct execlist_port *
execlists_port_complete(struct intel_engine_execlists * const execlists,
struct execlist_port * const port)
{
@ -675,6 +686,8 @@ execlists_port_complete(struct intel_engine_execlists * const execlists,
memmove(port, port + 1, m * sizeof(struct execlist_port));
memset(port + m, 0, sizeof(struct execlist_port));
return port;
}
static inline unsigned int