linux-pci.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Christoph Hellwig <hch@lst.de>
To: "Dan Williams" <dan.j.williams@intel.com>,
	"Jérôme Glisse" <jglisse@redhat.com>,
	"Jason Gunthorpe" <jgg@mellanox.com>,
	"Ben Skeggs" <bskeggs@redhat.com>
Cc: linux-mm@kvack.org, nouveau@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org, linux-nvdimm@lists.01.org,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 15/22] nouveau: use devm_memremap_pages directly
Date: Thu, 13 Jun 2019 11:43:18 +0200	[thread overview]
Message-ID: <20190613094326.24093-16-hch@lst.de> (raw)
In-Reply-To: <20190613094326.24093-1-hch@lst.de>

Just use devm_memremap_pages instead of hmm_devmem_add pages to allow
killing that wrapper which doesn't provide a whole lot of benefits.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/gpu/drm/nouveau/nouveau_dmem.c | 80 ++++++++++++--------------
 1 file changed, 38 insertions(+), 42 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c
index a50f6fd2fe24..9e32bc8ecbc7 100644
--- a/drivers/gpu/drm/nouveau/nouveau_dmem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c
@@ -72,7 +72,8 @@ struct nouveau_dmem_migrate {
 };
 
 struct nouveau_dmem {
-	struct hmm_devmem *devmem;
+	struct nouveau_drm *drm;
+	struct dev_pagemap pagemap;
 	struct nouveau_dmem_migrate migrate;
 	struct list_head chunk_free;
 	struct list_head chunk_full;
@@ -80,6 +81,11 @@ struct nouveau_dmem {
 	struct mutex mutex;
 };
 
+static inline struct nouveau_dmem *page_to_dmem(struct page *page)
+{
+	return container_of(page->pgmap, struct nouveau_dmem, pagemap);
+}
+
 struct nouveau_dmem_fault {
 	struct nouveau_drm *drm;
 	struct nouveau_fence *fence;
@@ -96,8 +102,7 @@ struct nouveau_migrate {
 	unsigned long dma_nr;
 };
 
-static void
-nouveau_dmem_free(struct hmm_devmem *devmem, struct page *page)
+static void nouveau_dmem_page_free(struct page *page)
 {
 	struct nouveau_dmem_chunk *chunk;
 	unsigned long idx;
@@ -260,29 +265,21 @@ static const struct migrate_vma_ops nouveau_dmem_fault_migrate_ops = {
 	.finalize_and_map	= nouveau_dmem_fault_finalize_and_map,
 };
 
-static vm_fault_t
-nouveau_dmem_fault(struct hmm_devmem *devmem,
-		   struct vm_area_struct *vma,
-		   unsigned long addr,
-		   const struct page *page,
-		   unsigned int flags,
-		   pmd_t *pmdp)
+static vm_fault_t nouveau_dmem_devmem_migrate(struct vm_fault *vmf)
 {
-	struct drm_device *drm_dev = dev_get_drvdata(devmem->device);
+	struct nouveau_dmem *dmem = page_to_dmem(vmf->page);
 	unsigned long src[1] = {0}, dst[1] = {0};
-	struct nouveau_dmem_fault fault = {0};
+	struct nouveau_dmem_fault fault = { .drm = dmem->drm };
 	int ret;
 
-
-
 	/*
 	 * FIXME what we really want is to find some heuristic to migrate more
 	 * than just one page on CPU fault. When such fault happens it is very
 	 * likely that more surrounding page will CPU fault too.
 	 */
-	fault.drm = nouveau_drm(drm_dev);
-	ret = migrate_vma(&nouveau_dmem_fault_migrate_ops, vma, addr,
-			  addr + PAGE_SIZE, src, dst, &fault);
+	ret = migrate_vma(&nouveau_dmem_fault_migrate_ops, vmf->vma,
+			vmf->address, vmf->address + PAGE_SIZE,
+			src, dst, &fault);
 	if (ret)
 		return VM_FAULT_SIGBUS;
 
@@ -292,10 +289,9 @@ nouveau_dmem_fault(struct hmm_devmem *devmem,
 	return 0;
 }
 
-static const struct hmm_devmem_ops
-nouveau_dmem_devmem_ops = {
-	.free = nouveau_dmem_free,
-	.fault = nouveau_dmem_fault,
+static const struct dev_pagemap_ops nouveau_dmem_pagemap_ops = {
+	.page_free		= nouveau_dmem_page_free,
+	.migrate		= nouveau_dmem_devmem_migrate,
 };
 
 static int
@@ -581,7 +577,8 @@ void
 nouveau_dmem_init(struct nouveau_drm *drm)
 {
 	struct device *device = drm->dev->dev;
-	unsigned long i, size;
+	struct resource *res;
+	unsigned long i, size, pfn_first;
 	int ret;
 
 	/* This only make sense on PASCAL or newer */
@@ -591,6 +588,7 @@ nouveau_dmem_init(struct nouveau_drm *drm)
 	if (!(drm->dmem = kzalloc(sizeof(*drm->dmem), GFP_KERNEL)))
 		return;
 
+	drm->dmem->drm = drm;
 	mutex_init(&drm->dmem->mutex);
 	INIT_LIST_HEAD(&drm->dmem->chunk_free);
 	INIT_LIST_HEAD(&drm->dmem->chunk_full);
@@ -600,11 +598,8 @@ nouveau_dmem_init(struct nouveau_drm *drm)
 
 	/* Initialize migration dma helpers before registering memory */
 	ret = nouveau_dmem_migrate_init(drm);
-	if (ret) {
-		kfree(drm->dmem);
-		drm->dmem = NULL;
-		return;
-	}
+	if (ret)
+		goto out_free;
 
 	/*
 	 * FIXME we need some kind of policy to decide how much VRAM we
@@ -612,14 +607,16 @@ nouveau_dmem_init(struct nouveau_drm *drm)
 	 * and latter if we want to do thing like over commit then we
 	 * could revisit this.
 	 */
-	drm->dmem->devmem = hmm_devmem_add(&nouveau_dmem_devmem_ops,
-					   device, size);
-	if (IS_ERR(drm->dmem->devmem)) {
-		kfree(drm->dmem);
-		drm->dmem = NULL;
-		return;
-	}
-
+	res = devm_request_free_mem_region(device, &iomem_resource, size);
+	if (IS_ERR(res))
+		goto out_free;
+	drm->dmem->pagemap.type = MEMORY_DEVICE_PRIVATE;
+	drm->dmem->pagemap.res = *res;
+	drm->dmem->pagemap.ops = &nouveau_dmem_pagemap_ops;
+	if (IS_ERR(devm_memremap_pages(device, &drm->dmem->pagemap)))
+		goto out_free;
+
+	pfn_first = res->start >> PAGE_SHIFT;
 	for (i = 0; i < (size / DMEM_CHUNK_SIZE); ++i) {
 		struct nouveau_dmem_chunk *chunk;
 		struct page *page;
@@ -632,8 +629,7 @@ nouveau_dmem_init(struct nouveau_drm *drm)
 		}
 
 		chunk->drm = drm;
-		chunk->pfn_first = drm->dmem->devmem->pfn_first;
-		chunk->pfn_first += (i * DMEM_CHUNK_NPAGES);
+		chunk->pfn_first = pfn_first + (i * DMEM_CHUNK_NPAGES);
 		list_add_tail(&chunk->list, &drm->dmem->chunk_empty);
 
 		page = pfn_to_page(chunk->pfn_first);
@@ -643,6 +639,10 @@ nouveau_dmem_init(struct nouveau_drm *drm)
 	}
 
 	NV_INFO(drm, "DMEM: registered %ldMB of device memory\n", size >> 20);
+	return;
+out_free:
+	kfree(drm->dmem);
+	drm->dmem = NULL;
 }
 
 static void
@@ -835,11 +835,7 @@ nouveau_dmem_page(struct nouveau_drm *drm, struct page *page)
 {
 	if (!is_device_private_page(page))
 		return false;
-
-	if (drm->dmem->devmem != page->pgmap->data)
-		return false;
-
-	return true;
+	return drm->dmem == page_to_dmem(page);
 }
 
 void
-- 
2.20.1


  parent reply	other threads:[~2019-06-13 15:44 UTC|newest]

Thread overview: 103+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-13  9:43 dev_pagemap related cleanups Christoph Hellwig
2019-06-13  9:43 ` [PATCH 01/22] mm: remove the unused ARCH_HAS_HMM_DEVICE Kconfig option Christoph Hellwig
2019-06-13 18:30   ` Jason Gunthorpe
2019-06-13  9:43 ` [PATCH 02/22] mm: remove the struct hmm_device infrastructure Christoph Hellwig
2019-06-13 18:46   ` Jason Gunthorpe
2019-06-13 23:06   ` [Nouveau] " John Hubbard
2019-06-13  9:43 ` [PATCH 03/22] mm: remove hmm_devmem_add_resource Christoph Hellwig
2019-06-13 18:52   ` Jason Gunthorpe
2019-06-14  6:19     ` Christoph Hellwig
2019-06-14  0:54   ` [Nouveau] " John Hubbard
2019-06-20 19:32   ` Michal Hocko
2019-06-13  9:43 ` [PATCH 04/22] mm: don't clear ->mapping in hmm_devmem_free Christoph Hellwig
2019-06-13 19:05   ` Jason Gunthorpe
2019-06-14  6:21     ` Christoph Hellwig
2019-06-14  1:46   ` John Hubbard
2019-06-20 19:36   ` Michal Hocko
2019-06-13  9:43 ` [PATCH 05/22] mm: export alloc_pages_vma Christoph Hellwig
2019-06-14  1:47   ` John Hubbard
2019-06-14  6:23     ` Christoph Hellwig
2019-06-20 19:17   ` Michal Hocko
2019-06-24 18:24     ` Dan Williams
2019-06-25  7:23       ` Christoph Hellwig
2019-06-25 15:00         ` Michal Hocko
2019-06-25 18:03           ` Dan Williams
2019-06-25 19:00             ` Michal Hocko
2019-06-25 19:52               ` Dan Williams
2019-06-26  5:46                 ` Michal Hocko
2019-06-26 16:14                   ` Dan Williams
2019-06-27  6:41                     ` Michal Hocko
2019-06-13  9:43 ` [PATCH 06/22] mm: factor out a devm_request_free_mem_region helper Christoph Hellwig
2019-06-13 19:16   ` Jason Gunthorpe
2019-06-14  6:24     ` Christoph Hellwig
2019-06-15  2:21   ` John Hubbard
2019-06-15 14:30     ` Christoph Hellwig
2019-06-13  9:43 ` [PATCH 07/22] memremap: move dev_pagemap callbacks into a separate structure Christoph Hellwig
2019-06-13 19:18   ` Jason Gunthorpe
2019-06-13 20:14   ` Logan Gunthorpe
2019-06-13  9:43 ` [PATCH 08/22] memremap: pass a struct dev_pagemap to ->kill Christoph Hellwig
2019-06-13 19:26   ` Jason Gunthorpe
2019-06-13 20:12   ` Logan Gunthorpe
2019-06-13 20:15     ` Dan Williams
2019-06-13  9:43 ` [PATCH 09/22] memremap: lift the devmap_enable manipulation into devm_memremap_pages Christoph Hellwig
2019-06-13 19:34   ` Jason Gunthorpe
2019-06-13 20:13     ` Dan Williams
2019-06-14  6:28     ` Christoph Hellwig
2019-06-13  9:43 ` [PATCH 10/22] memremap: add a migrate callback to struct dev_pagemap_ops Christoph Hellwig
2019-06-13 23:42   ` Ralph Campbell
2019-06-14  6:33     ` Christoph Hellwig
2019-06-13  9:43 ` [PATCH 11/22] memremap: remove the data field in struct dev_pagemap Christoph Hellwig
2019-06-13 19:37   ` Jason Gunthorpe
2019-06-13  9:43 ` [PATCH 12/22] memremap: provide an optional internal refcount " Christoph Hellwig
2019-06-13  9:43 ` [PATCH 13/22] device-dax: use the dev_pagemap internal refcount Christoph Hellwig
2019-06-14  0:22   ` Ira Weiny
2019-06-14  6:35     ` Christoph Hellwig
2019-06-13  9:43 ` [PATCH 14/22] nouveau: use alloc_page_vma directly Christoph Hellwig
2019-06-13 19:39   ` Jason Gunthorpe
2019-06-13  9:43 ` Christoph Hellwig [this message]
2019-06-13  9:43 ` [PATCH 16/22] mm: remove hmm_vma_alloc_locked_page Christoph Hellwig
2019-06-13  9:43 ` [PATCH 17/22] mm: remove hmm_devmem_add Christoph Hellwig
2019-06-13 19:42   ` Jason Gunthorpe
2019-06-14  6:39     ` Christoph Hellwig
2019-06-13  9:43 ` [PATCH 18/22] mm: mark DEVICE_PUBLIC as broken Christoph Hellwig
2019-06-13 19:44   ` Jason Gunthorpe
2019-06-13 19:53     ` Ralph Campbell
2019-06-13 19:58       ` Jason Gunthorpe
2019-06-14  0:43         ` Ira Weiny
2019-06-14  1:23           ` John Hubbard
2019-06-19 19:27             ` Jason Gunthorpe
2019-06-19 19:46               ` Dan Williams
2019-06-26  3:15               ` John Hubbard
2019-06-26  5:45                 ` Michal Hocko
2019-06-26  6:07                   ` John Hubbard
2019-06-14  6:43           ` Christoph Hellwig
2019-06-20 19:26   ` Michal Hocko
2019-06-25  7:29     ` Christoph Hellwig
2019-06-25 11:44       ` Jason Gunthorpe
2019-06-25 11:59         ` Christoph Hellwig
2019-06-13  9:43 ` [PATCH 19/22] mm: simplify ZONE_DEVICE page private data Christoph Hellwig
2019-06-13  9:43 ` [PATCH 20/22] mm: sort out the DEVICE_PRIVATE Kconfig mess Christoph Hellwig
2019-06-13 19:55   ` Jason Gunthorpe
2019-06-13  9:43 ` [PATCH 21/22] mm: remove the HMM config option Christoph Hellwig
2019-06-13 20:01   ` Jason Gunthorpe
2019-06-14  6:47     ` Christoph Hellwig
2019-06-13  9:43 ` [PATCH 22/22] mm: don't select MIGRATE_VMA_HELPER from HMM_MIRROR Christoph Hellwig
2019-06-13 20:04   ` Jason Gunthorpe
2019-06-14  1:53   ` [Nouveau] " John Hubbard
2019-06-14  6:48     ` Christoph Hellwig
2019-06-13 14:16 ` dev_pagemap related cleanups Jason Gunthorpe
2019-06-14  6:12   ` Christoph Hellwig
2019-06-13 18:27 ` Dan Williams
2019-06-13 20:17   ` Logan Gunthorpe
2019-06-13 20:21     ` Dan Williams
2019-06-13 20:24       ` Logan Gunthorpe
2019-06-13 20:48         ` Andrew Morton
2019-06-13 20:40   ` Jason Gunthorpe
2019-06-13 21:21     ` Christoph Hellwig
2019-06-13 23:10       ` Jason Gunthorpe
2019-06-14  6:14         ` Christoph Hellwig
2019-06-14  0:31     ` Ira Weiny
2019-06-14  6:13   ` Christoph Hellwig
2019-06-15  1:14     ` Dan Williams
2019-06-15  8:33       ` Christoph Hellwig
2019-06-15 18:09         ` Dan Williams

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190613094326.24093-16-hch@lst.de \
    --to=hch@lst.de \
    --cc=bskeggs@redhat.com \
    --cc=dan.j.williams@intel.com \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=jgg@mellanox.com \
    --cc=jglisse@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-nvdimm@lists.01.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=nouveau@lists.freedesktop.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).