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From: Vivek Goyal <vgoyal@redhat.com>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org
Cc: vgoyal@redhat.com, miklos@szeredi.hu, stefanha@redhat.com,
	dgilbert@redhat.com, sweil@redhat.com, swhiteho@redhat.com
Subject: [PATCH 47/52] virtio-fs: Map using the values from the capabilities
Date: Mon, 10 Dec 2018 12:13:13 -0500
Message-ID: <20181210171318.16998-48-vgoyal@redhat.com> (raw)
In-Reply-To: <20181210171318.16998-1-vgoyal@redhat.com>

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Instead of assuming we had the fixed bar for the cache, use the
value from the capabilities.
Use the other capabilities to map their memory.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 fs/fuse/virtio_fs.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)

diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index c18f406b61cd..7d5b23455639 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -53,6 +53,16 @@ struct virtio_fs {
 	void *window_kaddr;
 	phys_addr_t window_phys_addr;
 	size_t window_len;
+
+        /* Version table where version numbers can be read */
+	void *vertab_kaddr;
+	phys_addr_t vertab_phys_addr;
+	size_t vertab_len;
+
+        /* Journal */
+	void *journal_kaddr;
+	phys_addr_t journal_phys_addr;
+	size_t journal_len;
 };
 
 struct virtio_fs_forget {
@@ -684,6 +694,17 @@ static int virtio_fs_setup_dax(struct virtio_device *vdev, struct virtio_fs *fs)
 	}
 	phys_addr += cache_offset;
 
+	phys_addr = pci_resource_start(pci_dev, cache_bar);
+	bar_len = pci_resource_len(pci_dev, cache_bar);
+
+        if (cache_offset + cache_len > bar_len) {
+                dev_err(&vdev->dev,
+                        "%s: cache bar shorter than cap offset+len\n",
+                        __func__);
+                return -EINVAL;
+        }
+        phys_addr += cache_offset;
+
 	/* Ideally we would directly use the PCI BAR resource but
 	 * devm_memremap_pages() wants its own copy in pgmap.  So
 	 * initialize a struct resource from scratch (only the start
@@ -710,6 +731,80 @@ static int virtio_fs_setup_dax(struct virtio_device *vdev, struct virtio_fs *fs)
 	dev_dbg(&vdev->dev, "%s: cache kaddr 0x%px phys_addr 0x%llx len %llx\n",
 		__func__, fs->window_kaddr, phys_addr, cache_len);
 
+	/*
+	 * The journal and version table should be easier since DAX doesn't
+	 * need them
+	 */
+	if (have_journal) {
+		if (journal_bar != cache_bar) {
+			ret = pci_request_region(pci_dev, journal_bar,
+						 "virtio-fs-journal");
+			if (ret < 0) {
+				dev_err(&vdev->dev,
+					"%s: failed to request journal BAR\n",
+					__func__);
+				return ret;
+			}
+		}
+
+		phys_addr = pci_resource_start(pci_dev, journal_bar);
+		bar_len = pci_resource_len(pci_dev, journal_bar);
+
+		if (journal_offset + journal_len > bar_len) {
+			dev_err(&vdev->dev,
+				"%s: journal bar shorter than cap offset+len\n",
+				__func__);
+			return -EINVAL;
+		}
+		fs->journal_phys_addr = phys_addr + journal_offset;
+		fs->journal_len = journal_len;
+
+		fs->journal_kaddr = devm_memremap(&pci_dev->dev,
+						  fs->journal_phys_addr,
+						  journal_len, MEMREMAP_WB);
+		if (!fs->journal_kaddr) {
+			dev_err(&vdev->dev, "%s: failed to remap journal\n",
+				__func__);
+			return -ENOMEM;
+		}
+		dev_notice(&vdev->dev, "%s: journal at %px\n", __func__,
+			   fs->journal_kaddr);
+	}
+
+	if (have_vertab) {
+		if (vertab_bar != cache_bar &&
+		    vertab_bar != journal_bar) {
+			ret = pci_request_region(pci_dev, vertab_bar,
+						 "virtio-fs-vertab");
+			if (ret < 0) {
+				dev_err(&vdev->dev, "%s: failed to request"
+					" vertab BAR\n", __func__);
+				return ret;
+			}
+		}
+
+		phys_addr = pci_resource_start(pci_dev, vertab_bar);
+		bar_len = pci_resource_len(pci_dev, vertab_bar);
+
+		if (vertab_offset + vertab_len > bar_len) {
+			dev_err(&vdev->dev, "%s: version tab bar shorter than"
+				" cap offset+len\n", __func__);
+			return -EINVAL;
+		}
+		fs->vertab_phys_addr = phys_addr + vertab_offset;
+		fs->vertab_len = vertab_len;
+		fs->vertab_kaddr = devm_memremap(&pci_dev->dev,
+						 fs->vertab_phys_addr,
+						 vertab_len, MEMREMAP_WB);
+		if (!fs->vertab_kaddr) {
+			dev_err(&vdev->dev, "%s: failed to remap version"
+				" table\n", __func__);
+			return -ENOMEM;
+		}
+		dev_notice(&vdev->dev, "%s: version table at %px\n",
+				__func__, fs->vertab_kaddr);
+	}
+
 	fs->dax_dev = alloc_dax(fs, NULL, &virtio_fs_dax_ops);
 	if (!fs->dax_dev)
 		return -ENOMEM;
-- 
2.13.6


  parent reply index

Thread overview: 93+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-10 17:12 [PATCH 00/52] [RFC] virtio-fs: shared file system for virtual machines Vivek Goyal
2018-12-10 17:12 ` [PATCH 01/52] fuse: add skeleton virtio_fs.ko module Vivek Goyal
2018-12-10 17:12 ` [PATCH 02/52] fuse: add probe/remove virtio driver Vivek Goyal
2018-12-10 17:12 ` [PATCH 03/52] fuse: rely on mutex_unlock() barrier instead of fput() Vivek Goyal
2018-12-10 17:12 ` [PATCH 04/52] fuse: extract fuse_fill_super_common() Vivek Goyal
2018-12-10 17:12 ` [PATCH 05/52] virtio_fs: get mount working Vivek Goyal
2018-12-10 17:12 ` [PATCH 06/52] fuse: export fuse_end_request() Vivek Goyal
2018-12-10 17:12 ` [PATCH 07/52] fuse: export fuse_len_args() Vivek Goyal
2018-12-10 17:12 ` [PATCH 08/52] fuse: add fuse_iqueue_ops callbacks Vivek Goyal
2018-12-10 17:12 ` [PATCH 09/52] fuse: process requests queues Vivek Goyal
2018-12-10 17:12 ` [PATCH 10/52] fuse: export fuse_get_unique() Vivek Goyal
2018-12-10 17:12 ` [PATCH 11/52] fuse: implement FUSE_FORGET for virtio-fs Vivek Goyal
2018-12-10 17:12 ` [PATCH 12/52] virtio_fs: Set up dax_device Vivek Goyal
2018-12-10 17:12 ` [PATCH 13/52] dax: remove block device dependencies Vivek Goyal
2018-12-10 17:12 ` [PATCH 14/52] fuse: add fuse_conn->dax_dev field Vivek Goyal
2018-12-10 17:12 ` [PATCH 15/52] fuse: map virtio_fs DAX window BAR Vivek Goyal
2018-12-12 16:37   ` Christian Borntraeger
2018-12-13 11:55     ` Stefan Hajnoczi
2018-12-13 16:06   ` kbuild test robot
2018-12-13 19:55   ` Dan Williams
2018-12-13 20:09     ` Dr. David Alan Gilbert
2018-12-13 20:15       ` Dan Williams
2018-12-13 20:40         ` Vivek Goyal
2018-12-13 21:18           ` Vivek Goyal
2018-12-14 10:09             ` Dr. David Alan Gilbert
2018-12-10 17:12 ` [PATCH 16/52] virtio-fs: Add VIRTIO_PCI_CAP_SHARED_MEMORY_CFG and utility to find them Vivek Goyal
2018-12-12 16:36   ` [PATCH] virtio-fs: fix semicolon.cocci warnings kbuild test robot
2018-12-12 16:36   ` [PATCH 16/52] virtio-fs: Add VIRTIO_PCI_CAP_SHARED_MEMORY_CFG and utility to find them kbuild test robot
2018-12-10 17:12 ` [PATCH 17/52] virtio-fs: Retrieve shm capabilities for cache Vivek Goyal
2018-12-10 17:12 ` [PATCH 18/52] virtio-fs: Map cache using the values from the capabilities Vivek Goyal
2018-12-13  9:10   ` David Hildenbrand
2018-12-13  9:13     ` Dr. David Alan Gilbert
2018-12-13  9:34       ` David Hildenbrand
2018-12-13 10:00         ` Dr. David Alan Gilbert
2018-12-13 11:26           ` David Hildenbrand
2018-12-13 12:15             ` Dr. David Alan Gilbert
2018-12-13 12:24               ` David Hildenbrand
2018-12-13 12:38                 ` Cornelia Huck
2018-12-14 13:44                   ` Stefan Hajnoczi
2018-12-14 13:50                     ` Cornelia Huck
2018-12-14 14:06                       ` Dr. David Alan Gilbert
2018-12-17 11:25                       ` Stefan Hajnoczi
2018-12-17 10:53                     ` David Hildenbrand
2018-12-17 14:56                       ` Stefan Hajnoczi
2018-12-18 17:13                         ` Cornelia Huck
2018-12-18 17:25                           ` David Hildenbrand
2019-01-02 10:24                             ` Stefan Hajnoczi
2018-12-10 17:12 ` [PATCH 19/52] virito-fs: Make dax optional Vivek Goyal
2018-12-10 17:12 ` [PATCH 20/52] Limit number of pages returned by direct_access() Vivek Goyal
2018-12-10 17:12 ` [PATCH 21/52] fuse: Introduce fuse_dax_mapping Vivek Goyal
2018-12-10 17:12 ` [PATCH 22/52] Create a list of free memory ranges Vivek Goyal
2018-12-11 17:44   ` kbuild test robot
2018-12-15 19:22   ` kbuild test robot
2018-12-10 17:12 ` [PATCH 23/52] fuse: simplify fuse_fill_super_common() calling Vivek Goyal
2018-12-10 17:12 ` [PATCH 24/52] fuse: Introduce setupmapping/removemapping commands Vivek Goyal
2018-12-10 17:12 ` [PATCH 25/52] Introduce interval tree basic data structures Vivek Goyal
2018-12-10 17:12 ` [PATCH 26/52] fuse: Implement basic DAX read/write support commands Vivek Goyal
2018-12-10 17:12 ` [PATCH 27/52] fuse: Maintain a list of busy elements Vivek Goyal
2018-12-10 17:12 ` [PATCH 28/52] Do fallocate() to grow file before mapping for file growing writes Vivek Goyal
2018-12-11  6:13   ` kbuild test robot
2018-12-11  6:20   ` kbuild test robot
2018-12-10 17:12 ` [PATCH 29/52] fuse: add DAX mmap support Vivek Goyal
2018-12-10 17:12 ` [PATCH 30/52] fuse: delete dentry if timeout is zero Vivek Goyal
2018-12-10 17:12 ` [PATCH 31/52] dax: Pass dax_dev to dax_writeback_mapping_range() Vivek Goyal
2018-12-11  6:12   ` kbuild test robot
2018-12-11 17:38   ` kbuild test robot
2018-12-10 17:12 ` [PATCH 32/52] fuse: Define dax address space operations Vivek Goyal
2018-12-10 17:12 ` [PATCH 33/52] fuse, dax: Take ->i_mmap_sem lock during dax page fault Vivek Goyal
2018-12-10 17:13 ` [PATCH 34/52] fuse: Add logic to free up a memory range Vivek Goyal
2018-12-10 17:13 ` [PATCH 35/52] fuse: Add logic to do direct reclaim of memory Vivek Goyal
2018-12-10 17:13 ` [PATCH 36/52] fuse: Kick worker when free memory drops below 20% of total ranges Vivek Goyal
2018-12-10 17:13 ` [PATCH 37/52] fuse: multiplex cached/direct_io/dax file operations Vivek Goyal
2018-12-10 17:13 ` [PATCH 38/52] Dispatch FORGET requests later instead of dropping them Vivek Goyal
2018-12-10 17:13 ` [PATCH 39/52] Release file in process context Vivek Goyal
2018-12-10 17:13 ` [PATCH 40/52] fuse: Do not block on inode lock while freeing memory range Vivek Goyal
2018-12-10 17:13 ` [PATCH 41/52] fuse: Reschedule dax free work if too many EAGAIN attempts Vivek Goyal
2018-12-10 17:13 ` [PATCH 42/52] fuse: Wait for memory ranges to become free Vivek Goyal
2018-12-10 17:13 ` [PATCH 43/52] fuse: Take inode lock for dax inode truncation Vivek Goyal
2018-12-10 17:13 ` [PATCH 44/52] fuse: Clear setuid bit even in direct I/O path Vivek Goyal
2018-12-10 17:13 ` [PATCH 45/52] virtio: Free fuse devices on umount Vivek Goyal
2018-12-10 17:13 ` [PATCH 46/52] virtio-fs: Retrieve shm capabilities for version table Vivek Goyal
2018-12-10 17:13 ` Vivek Goyal [this message]
2018-12-10 17:13 ` [PATCH 48/52] virtio-fs: pass version table pointer to fuse Vivek Goyal
2018-12-10 17:13 ` [PATCH 49/52] fuse: don't crash if version table is NULL Vivek Goyal
2018-12-10 17:13 ` [PATCH 50/52] fuse: add shared version support (virtio-fs only) Vivek Goyal
2018-12-10 17:13 ` [PATCH 51/52] fuse: shared version cleanups Vivek Goyal
2018-12-10 17:13 ` [PATCH 52/52] fuse: fix fuse_permission() for the default_permissions case Vivek Goyal
2018-12-19 21:25   ` kbuild test robot
2018-12-11 12:54 ` [PATCH 00/52] [RFC] virtio-fs: shared file system for virtual machines Stefan Hajnoczi
2018-12-12 20:30 ` Konrad Rzeszutek Wilk
2018-12-12 21:22   ` Vivek Goyal
2019-02-12 15:56 ` Aneesh Kumar K.V
2019-02-12 18:57   ` Vivek Goyal

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