From patchwork Thu Mar 20 17:30:04 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Matthew Auld X-Patchwork-Id: 14024203 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DE145C35FFF for ; Thu, 20 Mar 2025 17:32:33 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1A87B10E678; Thu, 20 Mar 2025 17:32:33 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="hUErVRX5"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) by gabe.freedesktop.org (Postfix) with ESMTPS id 555A210E682; Thu, 20 Mar 2025 17:32:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1742491945; x=1774027945; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=3J+JKFb+NIIypGM5DXRP6y5s4OwcP2pHJOVjYdvZgCs=; b=hUErVRX54mH0lwuu/IGjncypmm5PjQeEW3zM5Am+lKfGU1bp1974wRw0 mKyYaQTJnI4Tnzt7wcm/L2gjxT/fVvB98d7NgVkHVP2SbSaIjIuB2kO+a LoZaQI0njkH7uleB0mRJ0LsuQANm+0O3WKd/G1kQ//AI3ogTCVNzi/Pu5 qcf7rz8tAra02e7J4mWdd3/n6RKhsiUTBpJYJcOu7G7pNedG5gGHzDhWh YoEubpXpcMKz9hzMAxmqyT4AbwLYegsPn1IGXlvyPht/C3886N0EKZyuU dXhFFfxNKXm75nVEYo6mt5OmQoReLBiPUEiQ+EVhh5O2ZqYTIP7mVlN4V g==; X-CSE-ConnectionGUID: YBVDJZ+5R120rBaKmDEErA== X-CSE-MsgGUID: e6qMm1cqT3OoCWl887Yaig== X-IronPort-AV: E=McAfee;i="6700,10204,11379"; a="69095610" X-IronPort-AV: E=Sophos;i="6.14,262,1736841600"; d="scan'208";a="69095610" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Mar 2025 10:32:25 -0700 X-CSE-ConnectionGUID: QZCWtpjCQpKEMNZyelEifw== X-CSE-MsgGUID: fG1Xe+x8QUamXY+VK81WFA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.14,262,1736841600"; d="scan'208";a="123168461" Received: from oandoniu-mobl3.ger.corp.intel.com (HELO mwauld-desk.intel.com) ([10.245.244.226]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Mar 2025 10:32:23 -0700 From: Matthew Auld To: intel-xe@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org, =?utf-8?q?Thomas_Hellstr=C3=B6m?= , Matthew Brost Subject: [PATCH 7/7] drm/xe/userptr: replace xe_hmm with gpusvm Date: Thu, 20 Mar 2025 17:30:04 +0000 Message-ID: <20250320172956.168358-16-matthew.auld@intel.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250320172956.168358-9-matthew.auld@intel.com> References: <20250320172956.168358-9-matthew.auld@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Goal here is cut over to gpusvm and remove xe_hmm, relying instead on common code. The core facilities we need are get_pages(), unmap_pages() and free_pages() for a given useptr range, plus a vm level notifier lock, which is now provided by gpusvm. Signed-off-by: Matthew Auld Cc: Thomas Hellström Cc: Matthew Brost --- drivers/gpu/drm/xe/Makefile | 1 - drivers/gpu/drm/xe/xe_exec.c | 4 +- drivers/gpu/drm/xe/xe_hmm.c | 349 ------------------------------- drivers/gpu/drm/xe/xe_hmm.h | 18 -- drivers/gpu/drm/xe/xe_pt.c | 20 +- drivers/gpu/drm/xe/xe_vm.c | 74 ++++--- drivers/gpu/drm/xe/xe_vm_types.h | 30 ++- 7 files changed, 70 insertions(+), 426 deletions(-) delete mode 100644 drivers/gpu/drm/xe/xe_hmm.c delete mode 100644 drivers/gpu/drm/xe/xe_hmm.h diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile index 9699b08585f7..ada1f0fad629 100644 --- a/drivers/gpu/drm/xe/Makefile +++ b/drivers/gpu/drm/xe/Makefile @@ -124,7 +124,6 @@ xe-y += xe_bb.o \ xe_wait_user_fence.o \ xe_wopcm.o -xe-$(CONFIG_HMM_MIRROR) += xe_hmm.o xe-$(CONFIG_DRM_GPUSVM) += xe_svm.o # graphics hardware monitoring (HWMON) support diff --git a/drivers/gpu/drm/xe/xe_exec.c b/drivers/gpu/drm/xe/xe_exec.c index b75adfc99fb7..84daeedd65d4 100644 --- a/drivers/gpu/drm/xe/xe_exec.c +++ b/drivers/gpu/drm/xe/xe_exec.c @@ -294,7 +294,7 @@ int xe_exec_ioctl(struct drm_device *dev, void *data, struct drm_file *file) if (err) goto err_put_job; - err = down_read_interruptible(&vm->userptr.notifier_lock); + err = down_read_interruptible(&vm->userptr.gpusvm.notifier_lock); if (err) goto err_put_job; @@ -336,7 +336,7 @@ int xe_exec_ioctl(struct drm_device *dev, void *data, struct drm_file *file) err_repin: if (!xe_vm_in_lr_mode(vm)) - up_read(&vm->userptr.notifier_lock); + up_read(&vm->userptr.gpusvm.notifier_lock); err_put_job: if (err) xe_sched_job_put(job); diff --git a/drivers/gpu/drm/xe/xe_hmm.c b/drivers/gpu/drm/xe/xe_hmm.c deleted file mode 100644 index c3cc0fa105e8..000000000000 --- a/drivers/gpu/drm/xe/xe_hmm.c +++ /dev/null @@ -1,349 +0,0 @@ -// SPDX-License-Identifier: MIT -/* - * Copyright © 2024 Intel Corporation - */ - -#include -#include -#include -#include -#include -#include -#include -#include "xe_hmm.h" -#include "xe_vm.h" -#include "xe_bo.h" - -static u64 xe_npages_in_range(unsigned long start, unsigned long end) -{ - return (end - start) >> PAGE_SHIFT; -} - -/** - * xe_mark_range_accessed() - mark a range is accessed, so core mm - * have such information for memory eviction or write back to - * hard disk - * @range: the range to mark - * @write: if write to this range, we mark pages in this range - * as dirty - */ -static void xe_mark_range_accessed(struct hmm_range *range, bool write) -{ - struct page *page; - u64 i, npages; - - npages = xe_npages_in_range(range->start, range->end); - for (i = 0; i < npages; i++) { - page = hmm_pfn_to_page(range->hmm_pfns[i]); - if (write) - set_page_dirty_lock(page); - - mark_page_accessed(page); - } -} - -static int xe_alloc_sg(struct xe_device *xe, struct sg_table *st, - struct hmm_range *range, struct rw_semaphore *notifier_sem) -{ - unsigned long i, npages, hmm_pfn; - unsigned long num_chunks = 0; - int ret; - - /* HMM docs says this is needed. */ - ret = down_read_interruptible(notifier_sem); - if (ret) - return ret; - - if (mmu_interval_read_retry(range->notifier, range->notifier_seq)) { - up_read(notifier_sem); - return -EAGAIN; - } - - npages = xe_npages_in_range(range->start, range->end); - for (i = 0; i < npages;) { - unsigned long len; - - hmm_pfn = range->hmm_pfns[i]; - xe_assert(xe, hmm_pfn & HMM_PFN_VALID); - - len = 1UL << hmm_pfn_to_map_order(hmm_pfn); - - /* If order > 0 the page may extend beyond range->start */ - len -= (hmm_pfn & ~HMM_PFN_FLAGS) & (len - 1); - i += len; - num_chunks++; - } - up_read(notifier_sem); - - return sg_alloc_table(st, num_chunks, GFP_KERNEL); -} - -/** - * xe_build_sg() - build a scatter gather table for all the physical pages/pfn - * in a hmm_range. dma-map pages if necessary. dma-address is save in sg table - * and will be used to program GPU page table later. - * @xe: the xe device who will access the dma-address in sg table - * @range: the hmm range that we build the sg table from. range->hmm_pfns[] - * has the pfn numbers of pages that back up this hmm address range. - * @st: pointer to the sg table. - * @notifier_sem: The xe notifier lock. - * @write: whether we write to this range. This decides dma map direction - * for system pages. If write we map it bi-diretional; otherwise - * DMA_TO_DEVICE - * - * All the contiguous pfns will be collapsed into one entry in - * the scatter gather table. This is for the purpose of efficiently - * programming GPU page table. - * - * The dma_address in the sg table will later be used by GPU to - * access memory. So if the memory is system memory, we need to - * do a dma-mapping so it can be accessed by GPU/DMA. - * - * FIXME: This function currently only support pages in system - * memory. If the memory is GPU local memory (of the GPU who - * is going to access memory), we need gpu dpa (device physical - * address), and there is no need of dma-mapping. This is TBD. - * - * FIXME: dma-mapping for peer gpu device to access remote gpu's - * memory. Add this when you support p2p - * - * This function allocates the storage of the sg table. It is - * caller's responsibility to free it calling sg_free_table. - * - * Returns 0 if successful; -ENOMEM if fails to allocate memory - */ -static int xe_build_sg(struct xe_device *xe, struct hmm_range *range, - struct sg_table *st, - struct rw_semaphore *notifier_sem, - bool write) -{ - unsigned long npages = xe_npages_in_range(range->start, range->end); - struct device *dev = xe->drm.dev; - struct scatterlist *sgl; - struct page *page; - unsigned long i, j; - - lockdep_assert_held(notifier_sem); - - i = 0; - for_each_sg(st->sgl, sgl, st->nents, j) { - unsigned long hmm_pfn, size; - - hmm_pfn = range->hmm_pfns[i]; - page = hmm_pfn_to_page(hmm_pfn); - xe_assert(xe, !is_device_private_page(page)); - - size = 1UL << hmm_pfn_to_map_order(hmm_pfn); - size -= page_to_pfn(page) & (size - 1); - i += size; - - if (unlikely(j == st->nents - 1)) { - xe_assert(xe, i >= npages); - if (i > npages) - size -= (i - npages); - - sg_mark_end(sgl); - } else { - xe_assert(xe, i < npages); - } - - sg_set_page(sgl, page, size << PAGE_SHIFT, 0); - } - - return dma_map_sgtable(dev, st, write ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE, - DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_NO_KERNEL_MAPPING); -} - -static void xe_hmm_userptr_set_mapped(struct xe_userptr_vma *uvma) -{ - struct xe_userptr *userptr = &uvma->userptr; - struct xe_vm *vm = xe_vma_vm(&uvma->vma); - - lockdep_assert_held_write(&vm->lock); - lockdep_assert_held(&vm->userptr.notifier_lock); - - mutex_lock(&userptr->unmap_mutex); - xe_assert(vm->xe, !userptr->mapped); - userptr->mapped = true; - mutex_unlock(&userptr->unmap_mutex); -} - -void xe_hmm_userptr_unmap(struct xe_userptr_vma *uvma) -{ - struct xe_userptr *userptr = &uvma->userptr; - struct xe_vma *vma = &uvma->vma; - bool write = !xe_vma_read_only(vma); - struct xe_vm *vm = xe_vma_vm(vma); - struct xe_device *xe = vm->xe; - - if (!lockdep_is_held_type(&vm->userptr.notifier_lock, 0) && - !lockdep_is_held_type(&vm->lock, 0) && - !(vma->gpuva.flags & XE_VMA_DESTROYED)) { - /* Don't unmap in exec critical section. */ - xe_vm_assert_held(vm); - /* Don't unmap while mapping the sg. */ - lockdep_assert_held(&vm->lock); - } - - mutex_lock(&userptr->unmap_mutex); - if (userptr->sg && userptr->mapped) - dma_unmap_sgtable(xe->drm.dev, userptr->sg, - write ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE, 0); - userptr->mapped = false; - mutex_unlock(&userptr->unmap_mutex); -} - -/** - * xe_hmm_userptr_free_sg() - Free the scatter gather table of userptr - * @uvma: the userptr vma which hold the scatter gather table - * - * With function xe_userptr_populate_range, we allocate storage of - * the userptr sg table. This is a helper function to free this - * sg table, and dma unmap the address in the table. - */ -void xe_hmm_userptr_free_sg(struct xe_userptr_vma *uvma) -{ - struct xe_userptr *userptr = &uvma->userptr; - - xe_assert(xe_vma_vm(&uvma->vma)->xe, userptr->sg); - xe_hmm_userptr_unmap(uvma); - sg_free_table(userptr->sg); - userptr->sg = NULL; -} - -/** - * xe_hmm_userptr_populate_range() - Populate physical pages of a virtual - * address range - * - * @uvma: userptr vma which has information of the range to populate. - * @is_mm_mmap_locked: True if mmap_read_lock is already acquired by caller. - * - * This function populate the physical pages of a virtual - * address range. The populated physical pages is saved in - * userptr's sg table. It is similar to get_user_pages but call - * hmm_range_fault. - * - * This function also read mmu notifier sequence # ( - * mmu_interval_read_begin), for the purpose of later - * comparison (through mmu_interval_read_retry). - * - * This must be called with mmap read or write lock held. - * - * This function allocates the storage of the userptr sg table. - * It is caller's responsibility to free it calling sg_free_table. - * - * returns: 0 for success; negative error no on failure - */ -int xe_hmm_userptr_populate_range(struct xe_userptr_vma *uvma, - bool is_mm_mmap_locked) -{ - unsigned long timeout = - jiffies + msecs_to_jiffies(HMM_RANGE_DEFAULT_TIMEOUT); - unsigned long *pfns; - struct xe_userptr *userptr; - struct xe_vma *vma = &uvma->vma; - u64 userptr_start = xe_vma_userptr(vma); - u64 userptr_end = userptr_start + xe_vma_size(vma); - struct xe_vm *vm = xe_vma_vm(vma); - struct hmm_range hmm_range = { - .pfn_flags_mask = 0, /* ignore pfns */ - .default_flags = HMM_PFN_REQ_FAULT, - .start = userptr_start, - .end = userptr_end, - .notifier = &uvma->userptr.notifier, - .dev_private_owner = vm->xe, - }; - bool write = !xe_vma_read_only(vma); - unsigned long notifier_seq; - u64 npages; - int ret; - - userptr = &uvma->userptr; - - if (is_mm_mmap_locked) - mmap_assert_locked(userptr->notifier.mm); - - if (vma->gpuva.flags & XE_VMA_DESTROYED) - return 0; - - notifier_seq = mmu_interval_read_begin(&userptr->notifier); - if (notifier_seq == userptr->notifier_seq) - return 0; - - if (userptr->sg) - xe_hmm_userptr_free_sg(uvma); - - npages = xe_npages_in_range(userptr_start, userptr_end); - pfns = kvmalloc_array(npages, sizeof(*pfns), GFP_KERNEL); - if (unlikely(!pfns)) - return -ENOMEM; - - if (write) - hmm_range.default_flags |= HMM_PFN_REQ_WRITE; - - if (!mmget_not_zero(userptr->notifier.mm)) { - ret = -EFAULT; - goto free_pfns; - } - - hmm_range.hmm_pfns = pfns; - - while (true) { - hmm_range.notifier_seq = mmu_interval_read_begin(&userptr->notifier); - - if (!is_mm_mmap_locked) - mmap_read_lock(userptr->notifier.mm); - - ret = hmm_range_fault(&hmm_range); - - if (!is_mm_mmap_locked) - mmap_read_unlock(userptr->notifier.mm); - - if (ret == -EBUSY) { - if (time_after(jiffies, timeout)) - break; - - continue; - } - break; - } - - mmput(userptr->notifier.mm); - - if (ret) - goto free_pfns; - - ret = xe_alloc_sg(vm->xe, &userptr->sgt, &hmm_range, &vm->userptr.notifier_lock); - if (ret) - goto free_pfns; - - ret = down_read_interruptible(&vm->userptr.notifier_lock); - if (ret) - goto free_st; - - if (mmu_interval_read_retry(hmm_range.notifier, hmm_range.notifier_seq)) { - ret = -EAGAIN; - goto out_unlock; - } - - ret = xe_build_sg(vm->xe, &hmm_range, &userptr->sgt, - &vm->userptr.notifier_lock, write); - if (ret) - goto out_unlock; - - xe_mark_range_accessed(&hmm_range, write); - userptr->sg = &userptr->sgt; - xe_hmm_userptr_set_mapped(uvma); - userptr->notifier_seq = hmm_range.notifier_seq; - up_read(&vm->userptr.notifier_lock); - kvfree(pfns); - return 0; - -out_unlock: - up_read(&vm->userptr.notifier_lock); -free_st: - sg_free_table(&userptr->sgt); -free_pfns: - kvfree(pfns); - return ret; -} diff --git a/drivers/gpu/drm/xe/xe_hmm.h b/drivers/gpu/drm/xe/xe_hmm.h deleted file mode 100644 index 0ea98d8e7bbc..000000000000 --- a/drivers/gpu/drm/xe/xe_hmm.h +++ /dev/null @@ -1,18 +0,0 @@ -/* SPDX-License-Identifier: MIT - * - * Copyright © 2024 Intel Corporation - */ - -#ifndef _XE_HMM_H_ -#define _XE_HMM_H_ - -#include - -struct xe_userptr_vma; - -int xe_hmm_userptr_populate_range(struct xe_userptr_vma *uvma, bool is_mm_mmap_locked); - -void xe_hmm_userptr_free_sg(struct xe_userptr_vma *uvma); - -void xe_hmm_userptr_unmap(struct xe_userptr_vma *uvma); -#endif diff --git a/drivers/gpu/drm/xe/xe_pt.c b/drivers/gpu/drm/xe/xe_pt.c index c43e7619cb80..824bf99e5f71 100644 --- a/drivers/gpu/drm/xe/xe_pt.c +++ b/drivers/gpu/drm/xe/xe_pt.c @@ -727,8 +727,8 @@ xe_pt_stage_bind(struct xe_tile *tile, struct xe_vma *vma, if (!xe_vma_is_null(vma) && !range) { if (xe_vma_is_userptr(vma)) - xe_res_first_sg(to_userptr_vma(vma)->userptr.sg, 0, - xe_vma_size(vma), &curs); + xe_res_first_dma(to_userptr_vma(vma)->userptr.range.pages.dma_addr, 0, + xe_vma_size(vma), &curs); else if (xe_bo_is_vram(bo) || xe_bo_is_stolen(bo)) xe_res_first(bo->ttm.resource, xe_vma_bo_offset(vma), xe_vma_size(vma), &curs); @@ -998,7 +998,7 @@ static void xe_pt_commit_locks_assert(struct xe_vma *vma) xe_pt_commit_prepare_locks_assert(vma); if (xe_vma_is_userptr(vma)) - lockdep_assert_held_read(&vm->userptr.notifier_lock); + lockdep_assert_held_read(&vm->userptr.gpusvm.notifier_lock); } static void xe_pt_commit(struct xe_vma *vma, @@ -1336,7 +1336,7 @@ static int vma_check_userptr(struct xe_vm *vm, struct xe_vma *vma, struct xe_userptr_vma *uvma; unsigned long notifier_seq; - lockdep_assert_held_read(&vm->userptr.notifier_lock); + lockdep_assert_held_read(&vm->userptr.gpusvm.notifier_lock); if (!xe_vma_is_userptr(vma)) return 0; @@ -1366,7 +1366,7 @@ static int op_check_userptr(struct xe_vm *vm, struct xe_vma_op *op, { int err = 0; - lockdep_assert_held_read(&vm->userptr.notifier_lock); + lockdep_assert_held_read(&vm->userptr.gpusvm.notifier_lock); switch (op->base.op) { case DRM_GPUVA_OP_MAP: @@ -1407,12 +1407,12 @@ static int xe_pt_userptr_pre_commit(struct xe_migrate_pt_update *pt_update) if (err) return err; - down_read(&vm->userptr.notifier_lock); + down_read(&vm->userptr.gpusvm.notifier_lock); list_for_each_entry(op, &vops->list, link) { err = op_check_userptr(vm, op, pt_update_ops); if (err) { - up_read(&vm->userptr.notifier_lock); + up_read(&vm->userptr.gpusvm.notifier_lock); break; } } @@ -2133,7 +2133,7 @@ static void bind_op_commit(struct xe_vm *vm, struct xe_tile *tile, vma->tile_present |= BIT(tile->id); vma->tile_staged &= ~BIT(tile->id); if (xe_vma_is_userptr(vma)) { - lockdep_assert_held_read(&vm->userptr.notifier_lock); + lockdep_assert_held_read(&vm->userptr.gpusvm.notifier_lock); to_userptr_vma(vma)->userptr.initial_bind = true; } @@ -2169,7 +2169,7 @@ static void unbind_op_commit(struct xe_vm *vm, struct xe_tile *tile, if (!vma->tile_present) { list_del_init(&vma->combined_links.rebind); if (xe_vma_is_userptr(vma)) { - lockdep_assert_held_read(&vm->userptr.notifier_lock); + lockdep_assert_held_read(&vm->userptr.gpusvm.notifier_lock); spin_lock(&vm->userptr.invalidated_lock); list_del_init(&to_userptr_vma(vma)->userptr.invalidate_link); @@ -2414,7 +2414,7 @@ xe_pt_update_ops_run(struct xe_tile *tile, struct xe_vma_ops *vops) if (pt_update_ops->needs_svm_lock) xe_svm_notifier_unlock(vm); if (pt_update_ops->needs_userptr_lock) - up_read(&vm->userptr.notifier_lock); + up_read(&vm->userptr.gpusvm.notifier_lock); return fence; diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c index 60303998bd61..fdc24718b9ad 100644 --- a/drivers/gpu/drm/xe/xe_vm.c +++ b/drivers/gpu/drm/xe/xe_vm.c @@ -5,6 +5,7 @@ #include "xe_vm.h" +#include "drm/drm_gpusvm.h" #include #include @@ -40,7 +41,6 @@ #include "xe_sync.h" #include "xe_trace_bo.h" #include "xe_wa.h" -#include "xe_hmm.h" static struct drm_gem_object *xe_vm_obj(struct xe_vm *vm) { @@ -53,7 +53,7 @@ static struct drm_gem_object *xe_vm_obj(struct xe_vm *vm) * * Check if the userptr vma has been invalidated since last successful * repin. The check is advisory only and can the function can be called - * without the vm->userptr.notifier_lock held. There is no guarantee that the + * without the vm->userptr.gpusvm.notifier_lock held. There is no guarantee that the * vma userptr will remain valid after a lockless check, so typically * the call needs to be followed by a proper check under the notifier_lock. * @@ -71,11 +71,17 @@ int xe_vma_userptr_pin_pages(struct xe_userptr_vma *uvma) struct xe_vma *vma = &uvma->vma; struct xe_vm *vm = xe_vma_vm(vma); struct xe_device *xe = vm->xe; + struct drm_gpusvm_ctx ctx = { + .read_only = xe_vma_read_only(vma), + }; lockdep_assert_held(&vm->lock); xe_assert(xe, xe_vma_is_userptr(vma)); - return xe_hmm_userptr_populate_range(uvma, false); + if (vma->gpuva.flags & XE_VMA_DESTROYED) + return 0; + + return drm_gpusvm_basic_range_get_pages(&uvma->userptr.range, &ctx); } static bool preempt_fences_waiting(struct xe_vm *vm) @@ -249,7 +255,7 @@ int xe_vm_add_compute_exec_queue(struct xe_vm *vm, struct xe_exec_queue *q) ++vm->preempt.num_exec_queues; q->lr.pfence = pfence; - down_read(&vm->userptr.notifier_lock); + down_read(&vm->userptr.gpusvm.notifier_lock); drm_gpuvm_resv_add_fence(&vm->gpuvm, exec, pfence, DMA_RESV_USAGE_BOOKKEEP, DMA_RESV_USAGE_BOOKKEEP); @@ -263,7 +269,7 @@ int xe_vm_add_compute_exec_queue(struct xe_vm *vm, struct xe_exec_queue *q) if (wait) dma_fence_enable_sw_signaling(pfence); - up_read(&vm->userptr.notifier_lock); + up_read(&vm->userptr.gpusvm.notifier_lock); out_fini: drm_exec_fini(exec); @@ -305,14 +311,14 @@ void xe_vm_remove_compute_exec_queue(struct xe_vm *vm, struct xe_exec_queue *q) * @vm: The VM. * * This function checks for whether the VM has userptrs that need repinning, - * and provides a release-type barrier on the userptr.notifier_lock after + * and provides a release-type barrier on the userptr.gpusvm.notifier_lock after * checking. * * Return: 0 if there are no userptrs needing repinning, -EAGAIN if there are. */ int __xe_vm_userptr_needs_repin(struct xe_vm *vm) { - lockdep_assert_held_read(&vm->userptr.notifier_lock); + lockdep_assert_held_read(&vm->userptr.gpusvm.notifier_lock); return (list_empty(&vm->userptr.repin_list) && list_empty(&vm->userptr.invalidated)) ? 0 : -EAGAIN; @@ -546,9 +552,9 @@ static void preempt_rebind_work_func(struct work_struct *w) (!(__tries)++ || __xe_vm_userptr_needs_repin(__vm)) : \ __xe_vm_userptr_needs_repin(__vm)) - down_read(&vm->userptr.notifier_lock); + down_read(&vm->userptr.gpusvm.notifier_lock); if (retry_required(tries, vm)) { - up_read(&vm->userptr.notifier_lock); + up_read(&vm->userptr.gpusvm.notifier_lock); err = -EAGAIN; goto out_unlock; } @@ -562,7 +568,7 @@ static void preempt_rebind_work_func(struct work_struct *w) /* Point of no return. */ arm_preempt_fences(vm, &preempt_fences); resume_and_reinstall_preempt_fences(vm, &exec); - up_read(&vm->userptr.notifier_lock); + up_read(&vm->userptr.gpusvm.notifier_lock); out_unlock: drm_exec_fini(&exec); @@ -589,6 +595,9 @@ static void __vma_userptr_invalidate(struct xe_vm *vm, struct xe_userptr_vma *uv struct xe_vma *vma = &uvma->vma; struct dma_resv_iter cursor; struct dma_fence *fence; + struct drm_gpusvm_ctx ctx = { + .in_notifier = true, + }; long err; /* @@ -625,7 +634,7 @@ static void __vma_userptr_invalidate(struct xe_vm *vm, struct xe_userptr_vma *uv XE_WARN_ON(err); } - xe_hmm_userptr_unmap(uvma); + drm_gpusvm_basic_range_unmap_pages(&uvma->userptr.range, &ctx); } static bool vma_userptr_invalidate(struct mmu_interval_notifier *mni, @@ -646,11 +655,11 @@ static bool vma_userptr_invalidate(struct mmu_interval_notifier *mni, "NOTIFIER: addr=0x%016llx, range=0x%016llx", xe_vma_start(vma), xe_vma_size(vma)); - down_write(&vm->userptr.notifier_lock); + down_write(&vm->userptr.gpusvm.notifier_lock); mmu_interval_set_seq(mni, cur_seq); __vma_userptr_invalidate(vm, uvma); - up_write(&vm->userptr.notifier_lock); + up_write(&vm->userptr.gpusvm.notifier_lock); trace_xe_vma_userptr_invalidate_complete(vma); return true; @@ -674,7 +683,7 @@ void xe_vma_userptr_force_invalidate(struct xe_userptr_vma *uvma) /* Protect against concurrent userptr pinning */ lockdep_assert_held(&vm->lock); /* Protect against concurrent notifiers */ - lockdep_assert_held(&vm->userptr.notifier_lock); + lockdep_assert_held(&vm->userptr.gpusvm.notifier_lock); /* * Protect against concurrent instances of this function and * the critical exec sections @@ -747,7 +756,7 @@ int xe_vm_userptr_pin(struct xe_vm *vm) } if (err) { - down_write(&vm->userptr.notifier_lock); + down_write(&vm->userptr.gpusvm.notifier_lock); spin_lock(&vm->userptr.invalidated_lock); list_for_each_entry_safe(uvma, next, &vm->userptr.repin_list, userptr.repin_link) { @@ -756,7 +765,7 @@ int xe_vm_userptr_pin(struct xe_vm *vm) &vm->userptr.invalidated); } spin_unlock(&vm->userptr.invalidated_lock); - up_write(&vm->userptr.notifier_lock); + up_write(&vm->userptr.gpusvm.notifier_lock); } return err; } @@ -1222,7 +1231,6 @@ static struct xe_vma *xe_vma_create(struct xe_vm *vm, INIT_LIST_HEAD(&userptr->invalidate_link); INIT_LIST_HEAD(&userptr->repin_link); vma->gpuva.gem.offset = bo_offset_or_userptr; - mutex_init(&userptr->unmap_mutex); err = mmu_interval_notifier_insert(&userptr->notifier, current->mm, @@ -1233,7 +1241,10 @@ static struct xe_vma *xe_vma_create(struct xe_vm *vm, return ERR_PTR(err); } - userptr->notifier_seq = LONG_MAX; + drm_gpusvm_basic_range_init(&vm->userptr.gpusvm, + &userptr->range, + &userptr->notifier, + &userptr->notifier_seq); } xe_vm_get(vm); @@ -1255,8 +1266,7 @@ static void xe_vma_destroy_late(struct xe_vma *vma) struct xe_userptr_vma *uvma = to_userptr_vma(vma); struct xe_userptr *userptr = &uvma->userptr; - if (userptr->sg) - xe_hmm_userptr_free_sg(uvma); + drm_gpusvm_basic_range_free_pages(&uvma->userptr.range); /* * Since userptr pages are not pinned, we can't remove @@ -1264,7 +1274,7 @@ static void xe_vma_destroy_late(struct xe_vma *vma) * them anymore */ mmu_interval_notifier_remove(&userptr->notifier); - mutex_destroy(&userptr->unmap_mutex); + drm_gpusvm_basic_range_fini(&uvma->userptr.range); xe_vm_put(vm); } else if (xe_vma_is_null(vma) || xe_vma_is_cpu_addr_mirror(vma)) { xe_vm_put(vm); @@ -1657,7 +1667,6 @@ struct xe_vm *xe_vm_create(struct xe_device *xe, u32 flags) INIT_LIST_HEAD(&vm->userptr.repin_list); INIT_LIST_HEAD(&vm->userptr.invalidated); - init_rwsem(&vm->userptr.notifier_lock); spin_lock_init(&vm->userptr.invalidated_lock); ttm_lru_bulk_move_init(&vm->lru_bulk_move); @@ -1763,6 +1772,9 @@ struct xe_vm *xe_vm_create(struct xe_device *xe, u32 flags) goto err_close; } + drm_gpusvm_basic_init(&vm->userptr.gpusvm, "xe-vm-userptr", &xe->drm); + drm_gpusvm_driver_set_lock(&vm->userptr.gpusvm, &vm->lock); + if (number_tiles > 1) vm->composite_fence_ctx = dma_fence_context_alloc(1); @@ -1867,9 +1879,9 @@ void xe_vm_close_and_put(struct xe_vm *vm) vma = gpuva_to_vma(gpuva); if (xe_vma_has_no_bo(vma)) { - down_read(&vm->userptr.notifier_lock); + down_read(&vm->userptr.gpusvm.notifier_lock); vma->gpuva.flags |= XE_VMA_DESTROYED; - up_read(&vm->userptr.notifier_lock); + up_read(&vm->userptr.gpusvm.notifier_lock); } xe_vm_remove_vma(vm, vma); @@ -1916,6 +1928,8 @@ void xe_vm_close_and_put(struct xe_vm *vm) if (xe_vm_in_fault_mode(vm)) xe_svm_fini(vm); + drm_gpusvm_basic_fini(&vm->userptr.gpusvm); + up_write(&vm->lock); down_write(&xe->usm.lock); @@ -2144,9 +2158,9 @@ static const u32 region_to_mem_type[] = { static void prep_vma_destroy(struct xe_vm *vm, struct xe_vma *vma, bool post_commit) { - down_read(&vm->userptr.notifier_lock); + down_read(&vm->userptr.gpusvm.notifier_lock); vma->gpuva.flags |= XE_VMA_DESTROYED; - up_read(&vm->userptr.notifier_lock); + up_read(&vm->userptr.gpusvm.notifier_lock); if (post_commit) xe_vm_remove_vma(vm, vma); } @@ -2625,9 +2639,9 @@ static void xe_vma_op_unwind(struct xe_vm *vm, struct xe_vma_op *op, struct xe_vma *vma = gpuva_to_vma(op->base.unmap.va); if (vma) { - down_read(&vm->userptr.notifier_lock); + down_read(&vm->userptr.gpusvm.notifier_lock); vma->gpuva.flags &= ~XE_VMA_DESTROYED; - up_read(&vm->userptr.notifier_lock); + up_read(&vm->userptr.gpusvm.notifier_lock); if (post_commit) xe_vm_insert_vma(vm, vma); } @@ -2646,9 +2660,9 @@ static void xe_vma_op_unwind(struct xe_vm *vm, struct xe_vma_op *op, xe_vma_destroy_unlocked(op->remap.next); } if (vma) { - down_read(&vm->userptr.notifier_lock); + down_read(&vm->userptr.gpusvm.notifier_lock); vma->gpuva.flags &= ~XE_VMA_DESTROYED; - up_read(&vm->userptr.notifier_lock); + up_read(&vm->userptr.gpusvm.notifier_lock); if (post_commit) xe_vm_insert_vma(vm, vma); } diff --git a/drivers/gpu/drm/xe/xe_vm_types.h b/drivers/gpu/drm/xe/xe_vm_types.h index 84fa41b9fa20..08f295873a2b 100644 --- a/drivers/gpu/drm/xe/xe_vm_types.h +++ b/drivers/gpu/drm/xe/xe_vm_types.h @@ -52,26 +52,23 @@ struct xe_userptr { struct list_head invalidate_link; /** @userptr: link into VM repin list if userptr. */ struct list_head repin_link; + /** + * @range: gpusvm range for this user pointer. + */ + struct drm_gpusvm_basic_range range; /** * @notifier: MMU notifier for user pointer (invalidation call back) */ struct mmu_interval_notifier notifier; - /** @sgt: storage for a scatter gather table */ - struct sg_table sgt; - /** @sg: allocated scatter gather table */ - struct sg_table *sg; + /** @notifier_seq: notifier sequence number */ unsigned long notifier_seq; - /** @unmap_mutex: Mutex protecting dma-unmapping */ - struct mutex unmap_mutex; /** * @initial_bind: user pointer has been bound at least once. - * write: vm->userptr.notifier_lock in read mode and vm->resv held. - * read: vm->userptr.notifier_lock in write mode or vm->resv held. + * write: vm->userptr.gpusvm.notifier_lock in read mode and vm->resv held. + * read: vm->userptr.gpusvm.notifier_lock in write mode or vm->resv held. */ bool initial_bind; - /** @mapped: Whether the @sgt sg-table is dma-mapped. Protected by @unmap_mutex. */ - bool mapped; #if IS_ENABLED(CONFIG_DRM_XE_USERPTR_INVAL_INJECT) u32 divisor; #endif @@ -109,7 +106,7 @@ struct xe_vma { /** * @tile_present: GT mask of binding are present for this VMA. * protected by vm->lock, vm->resv and for userptrs, - * vm->userptr.notifier_lock for writing. Needs either for reading, + * vm->userptr.gpusvm.notifier_lock for writing. Needs either for reading, * but if reading is done under the vm->lock only, it needs to be held * in write mode. */ @@ -238,16 +235,17 @@ struct xe_vm { /** @userptr: user pointer state */ struct { + /* + * @gpusvm: The gpusvm userptr for this vm. The + * gpusvm.notifier_lock protects notifier in write mode and + * submission in read mode. + */ + struct drm_gpusvm gpusvm; /** * @userptr.repin_list: list of VMAs which are user pointers, * and needs repinning. Protected by @lock. */ struct list_head repin_list; - /** - * @notifier_lock: protects notifier in write mode and - * submission in read mode. - */ - struct rw_semaphore notifier_lock; /** * @userptr.invalidated_lock: Protects the * @userptr.invalidated list.