From f70575805708cabdedea7498aaa3f710fde4d920 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 03:29:01 +0000
Subject: [PATCH] add lvds1024*800
---
kernel/drivers/gpu/drm/i915/i915_gem_evict.c | 243 +++++++++++++++++++++---------------------------
1 files changed, 105 insertions(+), 138 deletions(-)
diff --git a/kernel/drivers/gpu/drm/i915/i915_gem_evict.c b/kernel/drivers/gpu/drm/i915/i915_gem_evict.c
index 02b83a5..6501939 100644
--- a/kernel/drivers/gpu/drm/i915/i915_gem_evict.c
+++ b/kernel/drivers/gpu/drm/i915/i915_gem_evict.c
@@ -26,56 +26,26 @@
*
*/
-#include <drm/drmP.h>
-#include <drm/i915_drm.h>
+#include "gem/i915_gem_context.h"
+#include "gt/intel_gt_requests.h"
#include "i915_drv.h"
-#include "intel_drv.h"
#include "i915_trace.h"
I915_SELFTEST_DECLARE(static struct igt_evict_ctl {
bool fail_if_busy:1;
} igt_evict_ctl;)
-static bool ggtt_is_idle(struct drm_i915_private *i915)
+static int ggtt_flush(struct intel_gt *gt)
{
- struct intel_engine_cs *engine;
- enum intel_engine_id id;
-
- if (i915->gt.active_requests)
- return false;
-
- for_each_engine(engine, i915, id) {
- if (!intel_engine_has_kernel_context(engine))
- return false;
- }
-
- return true;
-}
-
-static int ggtt_flush(struct drm_i915_private *i915)
-{
- int err;
-
- /* Not everything in the GGTT is tracked via vma (otherwise we
+ /*
+ * Not everything in the GGTT is tracked via vma (otherwise we
* could evict as required with minimal stalling) so we are forced
* to idle the GPU and explicitly retire outstanding requests in
* the hopes that we can then remove contexts and the like only
* bound by their active reference.
*/
- err = i915_gem_switch_to_kernel_context(i915);
- if (err)
- return err;
-
- err = i915_gem_wait_for_idle(i915,
- I915_WAIT_INTERRUPTIBLE |
- I915_WAIT_LOCKED,
- MAX_SCHEDULE_TIMEOUT);
- if (err)
- return err;
-
- GEM_BUG_ON(!ggtt_is_idle(i915));
- return 0;
+ return intel_gt_wait_for_idle(gt, MAX_SCHEDULE_TIMEOUT);
}
static bool
@@ -87,9 +57,6 @@
if (i915_vma_is_pinned(vma))
return false;
- if (flags & PIN_NONFAULT && i915_vma_has_userfault(vma))
- return false;
-
list_add(&vma->evict_link, unwind);
return drm_mm_scan_add_block(scan, &vma->node);
}
@@ -99,7 +66,7 @@
* @vm: address space to evict from
* @min_size: size of the desired free space
* @alignment: alignment constraint of the desired free space
- * @cache_level: cache_level for the desired space
+ * @color: color for the desired space
* @start: start (inclusive) of the range from which to evict objects
* @end: end (exclusive) of the range from which to evict objects
* @flags: additional flags to control the eviction algorithm
@@ -120,38 +87,31 @@
int
i915_gem_evict_something(struct i915_address_space *vm,
u64 min_size, u64 alignment,
- unsigned cache_level,
+ unsigned long color,
u64 start, u64 end,
unsigned flags)
{
- struct drm_i915_private *dev_priv = vm->i915;
struct drm_mm_scan scan;
struct list_head eviction_list;
- struct list_head *phases[] = {
- &vm->inactive_list,
- &vm->active_list,
- NULL,
- }, **phase;
struct i915_vma *vma, *next;
struct drm_mm_node *node;
enum drm_mm_insert_mode mode;
+ struct i915_vma *active;
int ret;
- lockdep_assert_held(&vm->i915->drm.struct_mutex);
+ lockdep_assert_held(&vm->mutex);
trace_i915_gem_evict(vm, min_size, alignment, flags);
/*
- * The goal is to evict objects and amalgamate space in LRU order.
- * The oldest idle objects reside on the inactive list, which is in
- * retirement order. The next objects to retire are those in flight,
- * on the active list, again in retirement order.
+ * The goal is to evict objects and amalgamate space in rough LRU order.
+ * Since both active and inactive objects reside on the same list,
+ * in a mix of creation and last scanned order, as we process the list
+ * we sort it into inactive/active, which keeps the active portion
+ * in a rough MRU order.
*
* The retirement sequence is thus:
- * 1. Inactive objects (already retired)
- * 2. Active objects (will stall on unbinding)
- *
- * On each list, the oldest objects lie at the HEAD with the freshest
- * object on the TAIL.
+ * 1. Inactive objects (already retired, random order)
+ * 2. Active objects (will stall on unbinding, oldest scanned first)
*/
mode = DRM_MM_INSERT_BEST;
if (flags & PIN_HIGH)
@@ -159,28 +119,48 @@
if (flags & PIN_MAPPABLE)
mode = DRM_MM_INSERT_LOW;
drm_mm_scan_init_with_range(&scan, &vm->mm,
- min_size, alignment, cache_level,
+ min_size, alignment, color,
start, end, mode);
- /*
- * Retire before we search the active list. Although we have
- * reasonable accuracy in our retirement lists, we may have
- * a stray pin (preventing eviction) that can only be resolved by
- * retiring.
- */
- if (!(flags & PIN_NONBLOCK))
- i915_retire_requests(dev_priv);
- else
- phases[1] = NULL;
+ intel_gt_retire_requests(vm->gt);
search_again:
+ active = NULL;
INIT_LIST_HEAD(&eviction_list);
- phase = phases;
- do {
- list_for_each_entry(vma, *phase, vm_link)
- if (mark_free(&scan, vma, flags, &eviction_list))
- goto found;
- } while (*++phase);
+ list_for_each_entry_safe(vma, next, &vm->bound_list, vm_link) {
+ if (vma == active) { /* now seen this vma twice */
+ if (flags & PIN_NONBLOCK)
+ break;
+
+ active = ERR_PTR(-EAGAIN);
+ }
+
+ /*
+ * We keep this list in a rough least-recently scanned order
+ * of active elements (inactive elements are cheap to reap).
+ * New entries are added to the end, and we move anything we
+ * scan to the end. The assumption is that the working set
+ * of applications is either steady state (and thanks to the
+ * userspace bo cache it almost always is) or volatile and
+ * frequently replaced after a frame, which are self-evicting!
+ * Given that assumption, the MRU order of the scan list is
+ * fairly static, and keeping it in least-recently scan order
+ * is suitable.
+ *
+ * To notice when we complete one full cycle, we record the
+ * first active element seen, before moving it to the tail.
+ */
+ if (active != ERR_PTR(-EAGAIN) && i915_vma_is_active(vma)) {
+ if (!active)
+ active = vma;
+
+ list_move_tail(&vma->vm_link, &vm->bound_list);
+ continue;
+ }
+
+ if (mark_free(&scan, vma, flags, &eviction_list))
+ goto found;
+ }
/* Nothing found, clean up and bail out! */
list_for_each_entry_safe(vma, next, &eviction_list, evict_link) {
@@ -210,24 +190,17 @@
* us a termination condition, when the last retired context is
* the kernel's there is no more we can evict.
*/
- if (!ggtt_is_idle(dev_priv)) {
- if (I915_SELFTEST_ONLY(igt_evict_ctl.fail_if_busy))
- return -EBUSY;
+ if (I915_SELFTEST_ONLY(igt_evict_ctl.fail_if_busy))
+ return -EBUSY;
- ret = ggtt_flush(dev_priv);
- if (ret)
- return ret;
+ ret = ggtt_flush(vm->gt);
+ if (ret)
+ return ret;
- cond_resched();
- goto search_again;
- }
+ cond_resched();
- /*
- * If we still have pending pageflip completions, drop
- * back to userspace to give our workqueues time to
- * acquire our locks and unpin the old scanouts.
- */
- return intel_has_pending_fb_unpin(dev_priv) ? -EAGAIN : -ENOSPC;
+ flags |= PIN_NONBLOCK;
+ goto search_again;
found:
/* drm_mm doesn't allow any other other operations while
@@ -248,12 +221,17 @@
list_for_each_entry_safe(vma, next, &eviction_list, evict_link) {
__i915_vma_unpin(vma);
if (ret == 0)
- ret = i915_vma_unbind(vma);
+ ret = __i915_vma_unbind(vma);
}
while (ret == 0 && (node = drm_mm_scan_color_evict(&scan))) {
vma = container_of(node, struct i915_vma, node);
- ret = i915_vma_unbind(vma);
+
+ /* If we find any non-objects (!vma), we cannot evict them */
+ if (vma->node.color != I915_COLOR_UNEVICTABLE)
+ ret = __i915_vma_unbind(vma);
+ else
+ ret = -ENOSPC; /* XXX search failed, try again? */
}
return ret;
@@ -279,25 +257,23 @@
u64 start = target->start;
u64 end = start + target->size;
struct i915_vma *vma, *next;
- bool check_color;
int ret = 0;
- lockdep_assert_held(&vm->i915->drm.struct_mutex);
+ lockdep_assert_held(&vm->mutex);
GEM_BUG_ON(!IS_ALIGNED(start, I915_GTT_PAGE_SIZE));
GEM_BUG_ON(!IS_ALIGNED(end, I915_GTT_PAGE_SIZE));
trace_i915_gem_evict_node(vm, target, flags);
- /* Retire before we search the active list. Although we have
+ /*
+ * Retire before we search the active list. Although we have
* reasonable accuracy in our retirement lists, we may have
* a stray pin (preventing eviction) that can only be resolved by
* retiring.
*/
- if (!(flags & PIN_NONBLOCK))
- i915_retire_requests(vm->i915);
+ intel_gt_retire_requests(vm->gt);
- check_color = vm->mm.color_adjust;
- if (check_color) {
+ if (i915_vm_has_cache_coloring(vm)) {
/* Expand search to cover neighbouring guard pages (or lack!) */
if (start)
start -= I915_GTT_PAGE_SIZE;
@@ -314,16 +290,17 @@
break;
}
- GEM_BUG_ON(!node->allocated);
+ GEM_BUG_ON(!drm_mm_node_allocated(node));
vma = container_of(node, typeof(*vma), node);
- /* If we are using coloring to insert guard pages between
+ /*
+ * If we are using coloring to insert guard pages between
* different cache domains within the address space, we have
* to check whether the objects on either side of our range
* abutt and conflict. If they are in conflict, then we evict
* those as well to make room for our guard pages.
*/
- if (check_color) {
+ if (i915_vm_has_cache_coloring(vm)) {
if (node->start + node->size == target->start) {
if (node->color == target->color)
continue;
@@ -334,27 +311,18 @@
}
}
- if (flags & PIN_NONBLOCK &&
- (i915_vma_is_pinned(vma) || i915_vma_is_active(vma))) {
- ret = -ENOSPC;
- break;
- }
-
- if (flags & PIN_NONFAULT && i915_vma_has_userfault(vma)) {
- ret = -ENOSPC;
- break;
- }
-
- /* Overlap of objects in the same batch? */
if (i915_vma_is_pinned(vma)) {
ret = -ENOSPC;
- if (vma->exec_flags &&
- *vma->exec_flags & EXEC_OBJECT_PINNED)
- ret = -EINVAL;
break;
}
- /* Never show fear in the face of dragons!
+ if (flags & PIN_NONBLOCK && i915_vma_is_active(vma)) {
+ ret = -ENOSPC;
+ break;
+ }
+
+ /*
+ * Never show fear in the face of dragons!
*
* We cannot directly remove this node from within this
* iterator and as with i915_gem_evict_something() we employ
@@ -369,7 +337,7 @@
list_for_each_entry_safe(vma, next, &eviction_list, evict_link) {
__i915_vma_unpin(vma);
if (ret == 0)
- ret = i915_vma_unbind(vma);
+ ret = __i915_vma_unbind(vma);
}
return ret;
@@ -389,16 +357,9 @@
*/
int i915_gem_evict_vm(struct i915_address_space *vm)
{
- struct list_head *phases[] = {
- &vm->inactive_list,
- &vm->active_list,
- NULL
- }, **phase;
- struct list_head eviction_list;
- struct i915_vma *vma, *next;
- int ret;
+ int ret = 0;
- lockdep_assert_held(&vm->i915->drm.struct_mutex);
+ lockdep_assert_held(&vm->mutex);
trace_i915_gem_evict_vm(vm);
/* Switch back to the default context in order to unpin
@@ -407,29 +368,35 @@
* switch otherwise is ineffective.
*/
if (i915_is_ggtt(vm)) {
- ret = ggtt_flush(vm->i915);
+ ret = ggtt_flush(vm->gt);
if (ret)
return ret;
}
- INIT_LIST_HEAD(&eviction_list);
- phase = phases;
do {
- list_for_each_entry(vma, *phase, vm_link) {
+ struct i915_vma *vma, *vn;
+ LIST_HEAD(eviction_list);
+
+ list_for_each_entry(vma, &vm->bound_list, vm_link) {
if (i915_vma_is_pinned(vma))
continue;
__i915_vma_pin(vma);
list_add(&vma->evict_link, &eviction_list);
}
- } while (*++phase);
+ if (list_empty(&eviction_list))
+ break;
- ret = 0;
- list_for_each_entry_safe(vma, next, &eviction_list, evict_link) {
- __i915_vma_unpin(vma);
- if (ret == 0)
- ret = i915_vma_unbind(vma);
- }
+ ret = 0;
+ list_for_each_entry_safe(vma, vn, &eviction_list, evict_link) {
+ __i915_vma_unpin(vma);
+ if (ret == 0)
+ ret = __i915_vma_unbind(vma);
+ if (ret != -EINTR) /* "Get me out of here!" */
+ ret = 0;
+ }
+ } while (ret == 0);
+
return ret;
}
--
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