sm8750: init kernel modules repo
This commit is contained in:
558
qcom/opensource/graphics-kernel/kgsl_reclaim.c
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558
qcom/opensource/graphics-kernel/kgsl_reclaim.c
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@@ -0,0 +1,558 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2021, The Linux Foundation. All rights reserved.
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* Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
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*/
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#include <linux/kthread.h>
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#include <linux/notifier.h>
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#include <linux/pagevec.h>
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#include <linux/shmem_fs.h>
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#include <linux/swap.h>
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#include <linux/version.h>
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#include "kgsl_reclaim.h"
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#include "kgsl_sharedmem.h"
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#include "kgsl_trace.h"
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/*
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* Reclaiming excessive number of pages from a process will impact launch
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* latency for the subsequent launch of the process. After measuring the
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* launch latencies by having various maximum limits, it has been decided
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* that allowing 30MB (7680 pages) of relcaim per process will have little
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* impact and the latency will be within acceptable limit.
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*/
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static u32 kgsl_reclaim_max_page_limit = 7680;
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/* Setting this to 0 means we reclaim pages as specified in shrinker call */
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static u32 kgsl_nr_to_scan;
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struct work_struct reclaim_work;
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static atomic_t kgsl_nr_to_reclaim;
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#if (KERNEL_VERSION(6, 2, 0) <= LINUX_VERSION_CODE)
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static void kgsl_memdesc_clear_unevictable(struct kgsl_process_private *process,
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struct kgsl_memdesc *memdesc)
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{
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struct folio_batch fbatch;
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int i;
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/*
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* Pages that are first allocated are by default added to
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* unevictable list. To reclaim them, we first clear the
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* AS_UNEVICTABLE flag of the shmem file address space thus
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* check_move_unevictable_folios() places them on the
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* evictable list.
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*
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* Once reclaim is done, hint that further shmem allocations
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* will have to be on the unevictable list.
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*/
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mapping_clear_unevictable(memdesc->shmem_filp->f_mapping);
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folio_batch_init(&fbatch);
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for (i = 0; i < memdesc->page_count; i++) {
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set_page_dirty_lock(memdesc->pages[i]);
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spin_lock(&memdesc->lock);
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folio_batch_add(&fbatch, page_folio(memdesc->pages[i]));
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memdesc->pages[i] = NULL;
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atomic_inc(&process->unpinned_page_count);
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spin_unlock(&memdesc->lock);
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if (folio_batch_count(&fbatch) == PAGEVEC_SIZE) {
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check_move_unevictable_folios(&fbatch);
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__folio_batch_release(&fbatch);
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}
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}
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if (folio_batch_count(&fbatch)) {
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check_move_unevictable_folios(&fbatch);
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__folio_batch_release(&fbatch);
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}
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}
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static int kgsl_read_mapping(struct kgsl_memdesc *memdesc, struct page **page, int i)
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{
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struct folio *folio = shmem_read_folio_gfp(memdesc->shmem_filp->f_mapping,
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i, kgsl_gfp_mask(0));
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if (!IS_ERR(folio)) {
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*page = folio_page(folio, 0);
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return 0;
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}
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return PTR_ERR(folio);
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}
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#else
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static void kgsl_memdesc_clear_unevictable(struct kgsl_process_private *process,
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struct kgsl_memdesc *memdesc)
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{
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struct pagevec pvec;
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int i;
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/*
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* Pages that are first allocated are by default added to
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* unevictable list. To reclaim them, we first clear the
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* AS_UNEVICTABLE flag of the shmem file address space thus
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* check_move_unevictable_pages() places them on the
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* evictable list.
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*
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* Once reclaim is done, hint that further shmem allocations
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* will have to be on the unevictable list.
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*/
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mapping_clear_unevictable(memdesc->shmem_filp->f_mapping);
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pagevec_init(&pvec);
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for (i = 0; i < memdesc->page_count; i++) {
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set_page_dirty_lock(memdesc->pages[i]);
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spin_lock(&memdesc->lock);
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pagevec_add(&pvec, memdesc->pages[i]);
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memdesc->pages[i] = NULL;
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atomic_inc(&process->unpinned_page_count);
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spin_unlock(&memdesc->lock);
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if (pagevec_count(&pvec) == PAGEVEC_SIZE) {
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check_move_unevictable_pages(&pvec);
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__pagevec_release(&pvec);
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}
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}
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if (pagevec_count(&pvec)) {
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check_move_unevictable_pages(&pvec);
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__pagevec_release(&pvec);
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}
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}
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static int kgsl_read_mapping(struct kgsl_memdesc *memdesc, struct page **page, int i)
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{
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*page = shmem_read_mapping_page_gfp(memdesc->shmem_filp->f_mapping,
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i, kgsl_gfp_mask(0));
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return PTR_ERR_OR_ZERO(*page);
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}
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#endif
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static int kgsl_memdesc_get_reclaimed_pages(struct kgsl_mem_entry *entry)
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{
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struct kgsl_memdesc *memdesc = &entry->memdesc;
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int i, ret;
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struct page *page = NULL;
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for (i = 0; i < memdesc->page_count; i++) {
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if (memdesc->pages[i])
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continue;
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ret = kgsl_read_mapping(memdesc, &page, i);
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if (ret)
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return ret;
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kgsl_page_sync(memdesc->dev, page, PAGE_SIZE, DMA_BIDIRECTIONAL);
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/*
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* Update the pages array only if vmfault has not
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* updated it meanwhile
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*/
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spin_lock(&memdesc->lock);
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if (!memdesc->pages[i]) {
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memdesc->pages[i] = page;
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atomic_dec(&entry->priv->unpinned_page_count);
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} else
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put_page(page);
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spin_unlock(&memdesc->lock);
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}
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ret = kgsl_mmu_map(memdesc->pagetable, memdesc);
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if (ret)
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return ret;
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trace_kgsl_reclaim_memdesc(entry, false);
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memdesc->priv &= ~KGSL_MEMDESC_RECLAIMED;
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memdesc->priv &= ~KGSL_MEMDESC_SKIP_RECLAIM;
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return 0;
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}
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int kgsl_reclaim_to_pinned_state(
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struct kgsl_process_private *process)
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{
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struct kgsl_mem_entry *entry, *valid_entry;
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int next = 0, ret = 0, count;
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mutex_lock(&process->reclaim_lock);
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if (test_bit(KGSL_PROC_PINNED_STATE, &process->state))
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goto done;
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count = atomic_read(&process->unpinned_page_count);
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for ( ; ; ) {
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valid_entry = NULL;
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spin_lock(&process->mem_lock);
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entry = idr_get_next(&process->mem_idr, &next);
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if (entry == NULL) {
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spin_unlock(&process->mem_lock);
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break;
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}
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if (entry->memdesc.priv & KGSL_MEMDESC_RECLAIMED)
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valid_entry = kgsl_mem_entry_get(entry);
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spin_unlock(&process->mem_lock);
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if (valid_entry) {
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ret = kgsl_memdesc_get_reclaimed_pages(entry);
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kgsl_mem_entry_put(entry);
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if (ret)
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goto done;
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}
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next++;
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}
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trace_kgsl_reclaim_process(process, count, false);
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set_bit(KGSL_PROC_PINNED_STATE, &process->state);
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done:
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mutex_unlock(&process->reclaim_lock);
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return ret;
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}
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static void kgsl_reclaim_foreground_work(struct work_struct *work)
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{
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struct kgsl_process_private *process =
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container_of(work, struct kgsl_process_private, fg_work);
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if (test_bit(KGSL_PROC_STATE, &process->state))
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kgsl_reclaim_to_pinned_state(process);
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kgsl_process_private_put(process);
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}
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static ssize_t kgsl_proc_state_show(struct kobject *kobj,
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struct kgsl_process_attribute *attr, char *buf)
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{
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struct kgsl_process_private *process =
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container_of(kobj, struct kgsl_process_private, kobj);
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if (test_bit(KGSL_PROC_STATE, &process->state))
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return scnprintf(buf, PAGE_SIZE, "foreground\n");
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else
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return scnprintf(buf, PAGE_SIZE, "background\n");
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}
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static ssize_t kgsl_proc_state_store(struct kobject *kobj,
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struct kgsl_process_attribute *attr, const char *buf, ssize_t count)
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{
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struct kgsl_process_private *process =
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container_of(kobj, struct kgsl_process_private, kobj);
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if (sysfs_streq(buf, "foreground")) {
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if (!test_and_set_bit(KGSL_PROC_STATE, &process->state) &&
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kgsl_process_private_get(process))
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kgsl_schedule_work(&process->fg_work);
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} else if (sysfs_streq(buf, "background")) {
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clear_bit(KGSL_PROC_STATE, &process->state);
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} else
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return -EINVAL;
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return count;
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}
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static ssize_t gpumem_reclaimed_show(struct kobject *kobj,
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struct kgsl_process_attribute *attr, char *buf)
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{
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struct kgsl_process_private *process =
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container_of(kobj, struct kgsl_process_private, kobj);
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return scnprintf(buf, PAGE_SIZE, "%d\n",
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atomic_read(&process->unpinned_page_count) << PAGE_SHIFT);
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}
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PROCESS_ATTR(state, 0644, kgsl_proc_state_show, kgsl_proc_state_store);
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PROCESS_ATTR(gpumem_reclaimed, 0444, gpumem_reclaimed_show, NULL);
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static const struct attribute *proc_reclaim_attrs[] = {
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&attr_state.attr,
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&attr_gpumem_reclaimed.attr,
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NULL,
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};
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void kgsl_reclaim_proc_sysfs_init(struct kgsl_process_private *process)
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{
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WARN_ON(sysfs_create_files(&process->kobj, proc_reclaim_attrs));
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}
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ssize_t kgsl_proc_max_reclaim_limit_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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int ret;
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ret = kstrtou32(buf, 0, &kgsl_reclaim_max_page_limit);
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return ret ? ret : count;
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}
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ssize_t kgsl_proc_max_reclaim_limit_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return scnprintf(buf, PAGE_SIZE, "%d\n", kgsl_reclaim_max_page_limit);
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}
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ssize_t kgsl_nr_to_scan_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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int ret;
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ret = kstrtou32(buf, 0, &kgsl_nr_to_scan);
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return ret ? ret : count;
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}
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ssize_t kgsl_nr_to_scan_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return scnprintf(buf, PAGE_SIZE, "%d\n", kgsl_nr_to_scan);
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}
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static u32 kgsl_reclaim_process(struct kgsl_process_private *process,
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u32 pages_to_reclaim)
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{
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struct kgsl_memdesc *memdesc;
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struct kgsl_mem_entry *entry, *valid_entry;
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u32 next = 0, remaining = pages_to_reclaim;
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/*
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* If we do not get the lock here, it means that the buffers are
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* being pinned back. So do not keep waiting here as we would anyway
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* return empty handed once the lock is acquired.
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*/
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if (!mutex_trylock(&process->reclaim_lock))
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return 0;
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while (remaining) {
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if (atomic_read(&process->unpinned_page_count) >=
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kgsl_reclaim_max_page_limit)
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break;
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/* Abort reclaim if process submitted work. */
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if (atomic_read(&process->cmd_count))
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break;
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/* Abort reclaim if process foreground hint is received. */
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if (test_bit(KGSL_PROC_STATE, &process->state))
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break;
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valid_entry = NULL;
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spin_lock(&process->mem_lock);
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entry = idr_get_next(&process->mem_idr, &next);
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if (entry == NULL) {
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spin_unlock(&process->mem_lock);
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break;
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}
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memdesc = &entry->memdesc;
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if (!entry->pending_free &&
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(memdesc->priv & KGSL_MEMDESC_CAN_RECLAIM) &&
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!(memdesc->priv & KGSL_MEMDESC_RECLAIMED) &&
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!(memdesc->priv & KGSL_MEMDESC_SKIP_RECLAIM))
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valid_entry = kgsl_mem_entry_get(entry);
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spin_unlock(&process->mem_lock);
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if (!valid_entry) {
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next++;
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continue;
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}
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/* Do not reclaim pages mapped into a VBO */
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if (atomic_read(&valid_entry->vbo_count)) {
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kgsl_mem_entry_put(entry);
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next++;
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continue;
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}
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if ((atomic_read(&process->unpinned_page_count) +
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memdesc->page_count) > kgsl_reclaim_max_page_limit) {
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kgsl_mem_entry_put(entry);
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next++;
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continue;
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}
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if (memdesc->page_count > remaining) {
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kgsl_mem_entry_put(entry);
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next++;
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continue;
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}
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if (!kgsl_mmu_unmap(memdesc->pagetable, memdesc)) {
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kgsl_memdesc_clear_unevictable(process, memdesc);
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remaining -= memdesc->page_count;
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reclaim_shmem_address_space(memdesc->shmem_filp->f_mapping);
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mapping_set_unevictable(memdesc->shmem_filp->f_mapping);
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memdesc->priv |= KGSL_MEMDESC_RECLAIMED;
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trace_kgsl_reclaim_memdesc(entry, true);
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}
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kgsl_mem_entry_put(entry);
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next++;
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}
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if (next)
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clear_bit(KGSL_PROC_PINNED_STATE, &process->state);
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trace_kgsl_reclaim_process(process, pages_to_reclaim - remaining, true);
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mutex_unlock(&process->reclaim_lock);
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return (pages_to_reclaim - remaining);
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}
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static void kgsl_reclaim_background_work(struct work_struct *work)
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{
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u32 bg_proc = 0, nr_pages = atomic_read(&kgsl_nr_to_reclaim);
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u64 pp_nr_pages;
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struct list_head kgsl_reclaim_process_list;
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struct kgsl_process_private *process, *next;
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INIT_LIST_HEAD(&kgsl_reclaim_process_list);
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read_lock(&kgsl_driver.proclist_lock);
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list_for_each_entry(process, &kgsl_driver.process_list, list) {
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if (test_bit(KGSL_PROC_STATE, &process->state) ||
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!kgsl_process_private_get(process))
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continue;
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bg_proc++;
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list_add(&process->reclaim_list, &kgsl_reclaim_process_list);
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}
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read_unlock(&kgsl_driver.proclist_lock);
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list_for_each_entry(process, &kgsl_reclaim_process_list, reclaim_list) {
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if (!nr_pages)
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break;
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|
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pp_nr_pages = nr_pages;
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do_div(pp_nr_pages, bg_proc--);
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nr_pages -= kgsl_reclaim_process(process, pp_nr_pages);
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}
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list_for_each_entry_safe(process, next,
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&kgsl_reclaim_process_list, reclaim_list) {
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list_del(&process->reclaim_list);
|
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kgsl_process_private_put(process);
|
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}
|
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}
|
||||
|
||||
/* Shrinker callback functions */
|
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static unsigned long
|
||||
kgsl_reclaim_shrink_scan_objects(struct shrinker *shrinker,
|
||||
struct shrink_control *sc)
|
||||
{
|
||||
if (!current_is_kswapd())
|
||||
return 0;
|
||||
|
||||
atomic_set(&kgsl_nr_to_reclaim, kgsl_nr_to_scan ?
|
||||
kgsl_nr_to_scan : sc->nr_to_scan);
|
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kgsl_schedule_work(&reclaim_work);
|
||||
|
||||
return atomic_read(&kgsl_nr_to_reclaim);
|
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}
|
||||
|
||||
static unsigned long
|
||||
kgsl_reclaim_shrink_count_objects(struct shrinker *shrinker,
|
||||
struct shrink_control *sc)
|
||||
{
|
||||
struct kgsl_process_private *process;
|
||||
unsigned long count_reclaimable = 0;
|
||||
|
||||
if (!current_is_kswapd())
|
||||
return 0;
|
||||
|
||||
read_lock(&kgsl_driver.proclist_lock);
|
||||
list_for_each_entry(process, &kgsl_driver.process_list, list) {
|
||||
if (!test_bit(KGSL_PROC_STATE, &process->state))
|
||||
count_reclaimable += kgsl_reclaim_max_page_limit -
|
||||
atomic_read(&process->unpinned_page_count);
|
||||
}
|
||||
read_unlock(&kgsl_driver.proclist_lock);
|
||||
|
||||
return count_reclaimable;
|
||||
}
|
||||
|
||||
void kgsl_reclaim_proc_private_init(struct kgsl_process_private *process)
|
||||
{
|
||||
mutex_init(&process->reclaim_lock);
|
||||
INIT_WORK(&process->fg_work, kgsl_reclaim_foreground_work);
|
||||
set_bit(KGSL_PROC_PINNED_STATE, &process->state);
|
||||
set_bit(KGSL_PROC_STATE, &process->state);
|
||||
atomic_set(&process->unpinned_page_count, 0);
|
||||
}
|
||||
|
||||
#if (KERNEL_VERSION(6, 7, 0) <= LINUX_VERSION_CODE)
|
||||
static int kgsl_reclaim_shrinker_init(void)
|
||||
{
|
||||
kgsl_driver.reclaim_shrinker = shrinker_alloc(0, "kgsl_reclaim_shrinker");
|
||||
|
||||
if (!kgsl_driver.reclaim_shrinker)
|
||||
return -ENOMEM;
|
||||
|
||||
/* Initialize shrinker */
|
||||
kgsl_driver.reclaim_shrinker->count_objects = kgsl_reclaim_shrink_count_objects;
|
||||
kgsl_driver.reclaim_shrinker->scan_objects = kgsl_reclaim_shrink_scan_objects;
|
||||
kgsl_driver.reclaim_shrinker->seeks = DEFAULT_SEEKS;
|
||||
kgsl_driver.reclaim_shrinker->batch = 0;
|
||||
|
||||
shrinker_register(kgsl_driver.reclaim_shrinker);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void kgsl_reclaim_shrinker_close(void)
|
||||
{
|
||||
if (kgsl_driver.reclaim_shrinker)
|
||||
shrinker_free(kgsl_driver.reclaim_shrinker);
|
||||
|
||||
kgsl_driver.reclaim_shrinker = NULL;
|
||||
}
|
||||
#else
|
||||
/* Shrinker callback data*/
|
||||
static struct shrinker kgsl_reclaim_shrinker = {
|
||||
.count_objects = kgsl_reclaim_shrink_count_objects,
|
||||
.scan_objects = kgsl_reclaim_shrink_scan_objects,
|
||||
.seeks = DEFAULT_SEEKS,
|
||||
.batch = 0,
|
||||
};
|
||||
|
||||
static int kgsl_reclaim_shrinker_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
kgsl_driver.reclaim_shrinker = &kgsl_reclaim_shrinker;
|
||||
|
||||
/* Initialize shrinker */
|
||||
#if (KERNEL_VERSION(6, 0, 0) <= LINUX_VERSION_CODE)
|
||||
ret = register_shrinker(kgsl_driver.reclaim_shrinker, "kgsl_reclaim_shrinker");
|
||||
#else
|
||||
ret = register_shrinker(kgsl_driver.reclaim_shrinker);
|
||||
#endif
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void kgsl_reclaim_shrinker_close(void)
|
||||
{
|
||||
unregister_shrinker(kgsl_driver.reclaim_shrinker);
|
||||
}
|
||||
#endif
|
||||
|
||||
int kgsl_reclaim_start(void)
|
||||
{
|
||||
return kgsl_reclaim_shrinker_init();
|
||||
}
|
||||
|
||||
int kgsl_reclaim_init(void)
|
||||
{
|
||||
int ret = kgsl_reclaim_start();
|
||||
|
||||
if (ret) {
|
||||
pr_err("kgsl: reclaim: Failed to register shrinker\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
INIT_WORK(&reclaim_work, kgsl_reclaim_background_work);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void kgsl_reclaim_close(void)
|
||||
{
|
||||
kgsl_reclaim_shrinker_close();
|
||||
cancel_work_sync(&reclaim_work);
|
||||
}
|
||||
Reference in New Issue
Block a user