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virtio,vdpa,vhost: features, fixes 

vduse driver supporting blk
 virtio-vsock support for end of record with SEQPACKET
 vdpa: mac and mq support for ifcvf and mlx5
 vdpa: management netlink for ifcvf
 virtio-i2c, gpio dt bindings
 
 misc fixes, cleanups
 
 NB: when merging this with
 b542e383d8 ("eventfd: Make signal recursion protection a task bit")
 from Linus' tree, replace eventfd_signal_count with
 eventfd_signal_allowed, and drop the export of eventfd_wake_count from
 ("eventfd: Export eventfd_wake_count to modules").
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio updates from Michael Tsirkin:

 - vduse driver ("vDPA Device in Userspace") supporting emulated virtio
   block devices

 - virtio-vsock support for end of record with SEQPACKET

 - vdpa: mac and mq support for ifcvf and mlx5

 - vdpa: management netlink for ifcvf

 - virtio-i2c, gpio dt bindings

 - misc fixes and cleanups

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (39 commits)
  Documentation: Add documentation for VDUSE
  vduse: Introduce VDUSE - vDPA Device in Userspace
  vduse: Implement an MMU-based software IOTLB
  vdpa: Support transferring virtual addressing during DMA mapping
  vdpa: factor out vhost_vdpa_pa_map() and vhost_vdpa_pa_unmap()
  vdpa: Add an opaque pointer for vdpa_config_ops.dma_map()
  vhost-iotlb: Add an opaque pointer for vhost IOTLB
  vhost-vdpa: Handle the failure of vdpa_reset()
  vdpa: Add reset callback in vdpa_config_ops
  vdpa: Fix some coding style issues
  file: Export receive_fd() to modules
  eventfd: Export eventfd_wake_count to modules
  iova: Export alloc_iova_fast() and free_iova_fast()
  virtio-blk: remove unneeded "likely" statements
  virtio-balloon: Use virtio_find_vqs() helper
  vdpa: Make use of PFN_PHYS/PFN_UP/PFN_DOWN helper macro
  vsock_test: update message bounds test for MSG_EOR
  af_vsock: rename variables in receive loop
  virtio/vsock: support MSG_EOR bit processing
  vhost/vsock: support MSG_EOR bit processing
  ...
This commit is contained in:
Linus Torvalds 2021-09-11 14:48:42 -07:00
parent b79bd0d510 7bc7f61897
commit 78e709522d
41 changed files with 4131 additions and 329 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
Documentation/devicetree/bindings/gpio/gpio-virtio.yaml Normal file
View File

@ -0,0 +1,59 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/gpio/gpio-virtio.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Virtio GPIO controller
maintainers:
- Viresh Kumar <viresh.kumar@linaro.org>
allOf:
- $ref: /schemas/virtio/virtio-device.yaml#
description:
Virtio GPIO controller, see /schemas/virtio/virtio-device.yaml for more
details.
properties:
$nodename:
const: gpio
compatible:
const: virtio,device29
gpio-controller: true
"#gpio-cells":
const: 2
interrupt-controller: true
"#interrupt-cells":
const: 2
required:
- compatible
- gpio-controller
- "#gpio-cells"
unevaluatedProperties: false
examples:
- |
virtio@3000 {
compatible = "virtio,mmio";
reg = <0x3000 0x100>;
interrupts = <41>;
gpio {
compatible = "virtio,device29";
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
};
};
...

51
Documentation/devicetree/bindings/i2c/i2c-virtio.yaml Normal file
View File

@ -0,0 +1,51 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/i2c/i2c-virtio.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Virtio I2C Adapter
maintainers:
- Viresh Kumar <viresh.kumar@linaro.org>
allOf:
- $ref: /schemas/i2c/i2c-controller.yaml#
- $ref: /schemas/virtio/virtio-device.yaml#
description:
Virtio I2C device, see /schemas/virtio/virtio-device.yaml for more details.
properties:
$nodename:
const: i2c
compatible:
const: virtio,device22
required:
- compatible
unevaluatedProperties: false
examples:
- |
virtio@3000 {
compatible = "virtio,mmio";
reg = <0x3000 0x100>;
interrupts = <41>;
i2c {
compatible = "virtio,device22";
#address-cells = <1>;
#size-cells = <0>;
light-sensor@20 {
compatible = "dynaimage,al3320a";
reg = <0x20>;
};
};
};
...

3
Documentation/devicetree/bindings/virtio/mmio.yaml
View File

@ -36,7 +36,8 @@ required:
- reg
- interrupts
additionalProperties: false
additionalProperties:
type: object
examples:
- |

41
Documentation/devicetree/bindings/virtio/virtio-device.yaml Normal file
View File

@ -0,0 +1,41 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/virtio/virtio-device.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Virtio device bindings
maintainers:
- Viresh Kumar <viresh.kumar@linaro.org>
description:
These bindings are applicable to virtio devices irrespective of the bus they
are bound to, like mmio or pci.
# We need a select here so we don't match all nodes with 'virtio,mmio'
properties:
compatible:
pattern: "^virtio,device[0-9a-f]{1,8}$"
description: Virtio device nodes.
"virtio,deviceID", where ID is the virtio device id. The textual
representation of ID shall be in lower case hexadecimal with leading
zeroes suppressed.
required:
- compatible
additionalProperties: true
examples:
- |
virtio@3000 {
compatible = "virtio,mmio";
reg = <0x3000 0x100>;
interrupts = <43>;
i2c {
compatible = "virtio,device22";
};
};
...

1
Documentation/userspace-api/index.rst
View File

@ -27,6 +27,7 @@ place where this information is gathered.
iommu
media/index
sysfs-platform_profile
vduse
.. only:: subproject and html

1
Documentation/userspace-api/ioctl/ioctl-number.rst
View File

@ -299,6 +299,7 @@ Code Seq# Include File Comments
'z' 10-4F drivers/s390/crypto/zcrypt_api.h conflict!
'|' 00-7F linux/media.h
0x80 00-1F linux/fb.h
0x81 00-1F linux/vduse.h
0x89 00-06 arch/x86/include/asm/sockios.h
0x89 0B-DF linux/sockios.h
0x89 E0-EF linux/sockios.h SIOCPROTOPRIVATE range

233
Documentation/userspace-api/vduse.rst Normal file
View File

@ -0,0 +1,233 @@
==================================
VDUSE - "vDPA Device in Userspace"
==================================
vDPA (virtio data path acceleration) device is a device that uses a
datapath which complies with the virtio specifications with vendor
specific control path. vDPA devices can be both physically located on
the hardware or emulated by software. VDUSE is a framework that makes it
possible to implement software-emulated vDPA devices in userspace. And
to make the device emulation more secure, the emulated vDPA device's
control path is handled in the kernel and only the data path is
implemented in the userspace.
Note that only virtio block device is supported by VDUSE framework now,
which can reduce security risks when the userspace process that implements
the data path is run by an unprivileged user. The support for other device
types can be added after the security issue of corresponding device driver
is clarified or fixed in the future.
Create/Destroy VDUSE devices
------------------------
VDUSE devices are created as follows:
1. Create a new VDUSE instance with ioctl(VDUSE_CREATE_DEV) on
/dev/vduse/control.
2. Setup each virtqueue with ioctl(VDUSE_VQ_SETUP) on /dev/vduse/$NAME.
3. Begin processing VDUSE messages from /dev/vduse/$NAME. The first
messages will arrive while attaching the VDUSE instance to vDPA bus.
4. Send the VDPA_CMD_DEV_NEW netlink message to attach the VDUSE
instance to vDPA bus.
VDUSE devices are destroyed as follows:
1. Send the VDPA_CMD_DEV_DEL netlink message to detach the VDUSE
instance from vDPA bus.
2. Close the file descriptor referring to /dev/vduse/$NAME.
3. Destroy the VDUSE instance with ioctl(VDUSE_DESTROY_DEV) on
/dev/vduse/control.
The netlink messages can be sent via vdpa tool in iproute2 or use the
below sample codes:
.. code-block:: c
static int netlink_add_vduse(const char *name, enum vdpa_command cmd)
{
struct nl_sock *nlsock;
struct nl_msg *msg;
int famid;
nlsock = nl_socket_alloc();
if (!nlsock)
return -ENOMEM;
if (genl_connect(nlsock))
goto free_sock;
famid = genl_ctrl_resolve(nlsock, VDPA_GENL_NAME);
if (famid < 0)
goto close_sock;
msg = nlmsg_alloc();
if (!msg)
goto close_sock;
if (!genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, famid, 0, 0, cmd, 0))
goto nla_put_failure;
NLA_PUT_STRING(msg, VDPA_ATTR_DEV_NAME, name);
if (cmd == VDPA_CMD_DEV_NEW)
NLA_PUT_STRING(msg, VDPA_ATTR_MGMTDEV_DEV_NAME, "vduse");
if (nl_send_sync(nlsock, msg))
goto close_sock;
nl_close(nlsock);
nl_socket_free(nlsock);
return 0;
nla_put_failure:
nlmsg_free(msg);
close_sock:
nl_close(nlsock);
free_sock:
nl_socket_free(nlsock);
return -1;
}
How VDUSE works
---------------
As mentioned above, a VDUSE device is created by ioctl(VDUSE_CREATE_DEV) on
/dev/vduse/control. With this ioctl, userspace can specify some basic configuration
such as device name (uniquely identify a VDUSE device), virtio features, virtio
configuration space, the number of virtqueues and so on for this emulated device.
Then a char device interface (/dev/vduse/$NAME) is exported to userspace for device
emulation. Userspace can use the VDUSE_VQ_SETUP ioctl on /dev/vduse/$NAME to
add per-virtqueue configuration such as the max size of virtqueue to the device.
After the initialization, the VDUSE device can be attached to vDPA bus via
the VDPA_CMD_DEV_NEW netlink message. Userspace needs to read()/write() on
/dev/vduse/$NAME to receive/reply some control messages from/to VDUSE kernel
module as follows:
.. code-block:: c
static int vduse_message_handler(int dev_fd)
{
int len;
struct vduse_dev_request req;
struct vduse_dev_response resp;
len = read(dev_fd, &req, sizeof(req));
if (len != sizeof(req))
return -1;
resp.request_id = req.request_id;
switch (req.type) {
/* handle different types of messages */
}
len = write(dev_fd, &resp, sizeof(resp));
if (len != sizeof(resp))
return -1;
return 0;
}
There are now three types of messages introduced by VDUSE framework:
- VDUSE_GET_VQ_STATE: Get the state for virtqueue, userspace should return
avail index for split virtqueue or the device/driver ring wrap counters and
the avail and used index for packed virtqueue.
- VDUSE_SET_STATUS: Set the device status, userspace should follow
the virtio spec: https://docs.oasis-open.org/virtio/virtio/v1.1/virtio-v1.1.html
to process this message. For example, fail to set the FEATURES_OK device
status bit if the device can not accept the negotiated virtio features
get from the VDUSE_DEV_GET_FEATURES ioctl.
- VDUSE_UPDATE_IOTLB: Notify userspace to update the memory mapping for specified
IOVA range, userspace should firstly remove the old mapping, then setup the new
mapping via the VDUSE_IOTLB_GET_FD ioctl.
After DRIVER_OK status bit is set via the VDUSE_SET_STATUS message, userspace is
able to start the dataplane processing as follows:
1. Get the specified virtqueue's information with the VDUSE_VQ_GET_INFO ioctl,
including the size, the IOVAs of descriptor table, available ring and used ring,
the state and the ready status.
2. Pass the above IOVAs to the VDUSE_IOTLB_GET_FD ioctl so that those IOVA regions
can be mapped into userspace. Some sample codes is shown below:
.. code-block:: c
static int perm_to_prot(uint8_t perm)
{
int prot = 0;
switch (perm) {
case VDUSE_ACCESS_WO:
prot |= PROT_WRITE;
break;
case VDUSE_ACCESS_RO:
prot |= PROT_READ;
break;
case VDUSE_ACCESS_RW:
prot |= PROT_READ | PROT_WRITE;
break;
}
return prot;
}
static void *iova_to_va(int dev_fd, uint64_t iova, uint64_t *len)
{
int fd;
void *addr;
size_t size;
struct vduse_iotlb_entry entry;
entry.start = iova;
entry.last = iova;
/*
* Find the first IOVA region that overlaps with the specified
* range [start, last] and return the corresponding file descriptor.
*/
fd = ioctl(dev_fd, VDUSE_IOTLB_GET_FD, &entry);
if (fd < 0)
return NULL;
size = entry.last - entry.start + 1;
*len = entry.last - iova + 1;
addr = mmap(0, size, perm_to_prot(entry.perm), MAP_SHARED,
fd, entry.offset);
close(fd);
if (addr == MAP_FAILED)
return NULL;
/*
* Using some data structures such as linked list to store
* the iotlb mapping. The munmap(2) should be called for the
* cached mapping when the corresponding VDUSE_UPDATE_IOTLB
* message is received or the device is reset.
*/
return addr + iova - entry.start;
}
3. Setup the kick eventfd for the specified virtqueues with the VDUSE_VQ_SETUP_KICKFD
ioctl. The kick eventfd is used by VDUSE kernel module to notify userspace to
consume the available ring. This is optional since userspace can choose to poll the
available ring instead.
4. Listen to the kick eventfd (optional) and consume the available ring. The buffer
described by the descriptors in the descriptor table should be also mapped into
userspace via the VDUSE_IOTLB_GET_FD ioctl before accessing.
5. Inject an interrupt for specific virtqueue with the VDUSE_INJECT_VQ_IRQ ioctl
after the used ring is filled.
For more details on the uAPI, please see include/uapi/linux/vduse.h.

4
drivers/block/virtio_blk.c
View File

@ -762,7 +762,7 @@ static int virtblk_probe(struct virtio_device *vdev)
goto out_free_vblk;
/* Default queue sizing is to fill the ring. */
if (likely(!virtblk_queue_depth)) {
if (!virtblk_queue_depth) {
queue_depth = vblk->vqs[0].vq->num_free;
/* ... but without indirect descs, we use 2 descs per req */
if (!virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC))
@ -836,7 +836,7 @@ static int virtblk_probe(struct virtio_device *vdev)
else
blk_size = queue_logical_block_size(q);
if (unlikely(blk_size < SECTOR_SIZE || blk_size > PAGE_SIZE)) {
if (blk_size < SECTOR_SIZE || blk_size > PAGE_SIZE) {
dev_err(&vdev->dev,
"block size is changed unexpectedly, now is %u\n",
blk_size);

2
drivers/iommu/iova.c
View File

@ -519,6 +519,7 @@ alloc_iova_fast(struct iova_domain *iovad, unsigned long size,
return new_iova->pfn_lo;
}
EXPORT_SYMBOL_GPL(alloc_iova_fast);
/**
* free_iova_fast - free iova pfn range into rcache
@ -536,6 +537,7 @@ free_iova_fast(struct iova_domain *iovad, unsigned long pfn, unsigned long size)
free_iova(iovad, pfn);
}
EXPORT_SYMBOL_GPL(free_iova_fast);
#define fq_ring_for_each(i, fq) \
for ((i) = (fq)->head; (i) != (fq)->tail; (i) = ((i) + 1) % IOVA_FQ_SIZE)

11
drivers/vdpa/Kconfig
View File

@ -33,6 +33,16 @@ config VDPA_SIM_BLOCK
vDPA block device simulator which terminates IO request in a
memory buffer.
config VDPA_USER
tristate "VDUSE (vDPA Device in Userspace) support"
depends on EVENTFD && MMU && HAS_DMA
select DMA_OPS
select VHOST_IOTLB
select IOMMU_IOVA
help
With VDUSE it is possible to emulate a vDPA Device
in a userspace program.
config IFCVF
tristate "Intel IFC VF vDPA driver"
depends on PCI_MSI
@ -53,6 +63,7 @@ config MLX5_VDPA
config MLX5_VDPA_NET
tristate "vDPA driver for ConnectX devices"
select MLX5_VDPA
select VHOST_RING
depends on MLX5_CORE
help
VDPA network driver for ConnectX6 and newer. Provides offloading

1
drivers/vdpa/Makefile
View File

@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_VDPA) += vdpa.o
obj-$(CONFIG_VDPA_SIM) += vdpa_sim/
obj-$(CONFIG_VDPA_USER) += vdpa_user/
obj-$(CONFIG_IFCVF) += ifcvf/
obj-$(CONFIG_MLX5_VDPA) += mlx5/
obj-$(CONFIG_VP_VDPA) += virtio_pci/

8
drivers/vdpa/ifcvf/ifcvf_base.c
View File

@ -158,7 +158,9 @@ int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *pdev)
return -EIO;
}
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
hw->nr_vring = ifc_ioread16(&hw->common_cfg->num_queues);
for (i = 0; i < hw->nr_vring; i++) {
ifc_iowrite16(i, &hw->common_cfg->queue_select);
notify_off = ifc_ioread16(&hw->common_cfg->queue_notify_off);
hw->vring[i].notify_addr = hw->notify_base +
@ -304,7 +306,7 @@ u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid)
u32 q_pair_id;
ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
q_pair_id = qid / (IFCVF_MAX_QUEUE_PAIRS * 2);
q_pair_id = qid / hw->nr_vring;
avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2];
last_avail_idx = ifc_ioread16(avail_idx_addr);
@ -318,7 +320,7 @@ int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num)
u32 q_pair_id;
ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
q_pair_id = qid / (IFCVF_MAX_QUEUE_PAIRS * 2);
q_pair_id = qid / hw->nr_vring;
avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2];
hw->vring[qid].last_avail_idx = num;
ifc_iowrite16(num, avail_idx_addr);

25
drivers/vdpa/ifcvf/ifcvf_base.h
View File

@ -22,17 +22,8 @@
#define N3000_DEVICE_ID 0x1041
#define N3000_SUBSYS_DEVICE_ID 0x001A
#define IFCVF_NET_SUPPORTED_FEATURES \
((1ULL << VIRTIO_NET_F_MAC) | \
(1ULL << VIRTIO_F_ANY_LAYOUT) | \
(1ULL << VIRTIO_F_VERSION_1) | \
(1ULL << VIRTIO_NET_F_STATUS) | \
(1ULL << VIRTIO_F_ORDER_PLATFORM) | \
(1ULL << VIRTIO_F_ACCESS_PLATFORM) | \
(1ULL << VIRTIO_NET_F_MRG_RXBUF))
/* Only one queue pair for now. */
#define IFCVF_MAX_QUEUE_PAIRS 1
/* Max 8 data queue pairs(16 queues) and one control vq for now. */
#define IFCVF_MAX_QUEUES 17
#define IFCVF_QUEUE_ALIGNMENT PAGE_SIZE
#define IFCVF_QUEUE_MAX 32768
@ -51,8 +42,6 @@
#define ifcvf_private_to_vf(adapter) \
(&((struct ifcvf_adapter *)adapter)->vf)
#define IFCVF_MAX_INTR (IFCVF_MAX_QUEUE_PAIRS * 2 + 1)
struct vring_info {
u64 desc;
u64 avail;
@ -83,7 +72,7 @@ struct ifcvf_hw {
u32 dev_type;
struct virtio_pci_common_cfg __iomem *common_cfg;
void __iomem *net_cfg;
struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2];
struct vring_info vring[IFCVF_MAX_QUEUES];
void __iomem * const *base;
char config_msix_name[256];
struct vdpa_callback config_cb;
@ -103,7 +92,13 @@ struct ifcvf_vring_lm_cfg {
struct ifcvf_lm_cfg {
u8 reserved[IFCVF_LM_RING_STATE_OFFSET];
struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUE_PAIRS];
struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUES];
};
struct ifcvf_vdpa_mgmt_dev {
struct vdpa_mgmt_dev mdev;
struct ifcvf_adapter *adapter;
struct pci_dev *pdev;
};
int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev);

257
drivers/vdpa/ifcvf/ifcvf_main.c
View File

@ -63,9 +63,13 @@ static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
struct pci_dev *pdev = adapter->pdev;
struct ifcvf_hw *vf = &adapter->vf;
int vector, i, ret, irq;
u16 max_intr;
ret = pci_alloc_irq_vectors(pdev, IFCVF_MAX_INTR,
IFCVF_MAX_INTR, PCI_IRQ_MSIX);
/* all queues and config interrupt */
max_intr = vf->nr_vring + 1;
ret = pci_alloc_irq_vectors(pdev, max_intr,
max_intr, PCI_IRQ_MSIX);
if (ret < 0) {
IFCVF_ERR(pdev, "Failed to alloc IRQ vectors\n");
return ret;
@ -83,7 +87,7 @@ static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
return ret;
}
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
for (i = 0; i < vf->nr_vring; i++) {
snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n",
pci_name(pdev), i);
vector = i + IFCVF_MSI_QUEUE_OFF;
@ -112,7 +116,6 @@ static int ifcvf_start_datapath(void *private)
u8 status;
int ret;
vf->nr_vring = IFCVF_MAX_QUEUE_PAIRS * 2;
ret = ifcvf_start_hw(vf);
if (ret < 0) {
status = ifcvf_get_status(vf);
@ -128,7 +131,7 @@ static int ifcvf_stop_datapath(void *private)
struct ifcvf_hw *vf = ifcvf_private_to_vf(private);
int i;
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++)
for (i = 0; i < vf->nr_vring; i++)
vf->vring[i].cb.callback = NULL;
ifcvf_stop_hw(vf);
@ -141,7 +144,7 @@ static void ifcvf_reset_vring(struct ifcvf_adapter *adapter)
struct ifcvf_hw *vf = ifcvf_private_to_vf(adapter);
int i;
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
for (i = 0; i < vf->nr_vring; i++) {
vf->vring[i].last_avail_idx = 0;
vf->vring[i].desc = 0;
vf->vring[i].avail = 0;
@ -171,17 +174,12 @@ static u64 ifcvf_vdpa_get_features(struct vdpa_device *vdpa_dev)
struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
struct pci_dev *pdev = adapter->pdev;
u32 type = vf->dev_type;
u64 features;
switch (vf->dev_type) {
case VIRTIO_ID_NET:
features = ifcvf_get_features(vf) & IFCVF_NET_SUPPORTED_FEATURES;
break;
case VIRTIO_ID_BLOCK:
if (type == VIRTIO_ID_NET || type == VIRTIO_ID_BLOCK)
features = ifcvf_get_features(vf);
break;
default:
else {
features = 0;
IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", vf->dev_type);
}
@ -218,23 +216,12 @@ static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
int ret;
vf = vdpa_to_vf(vdpa_dev);
adapter = dev_get_drvdata(vdpa_dev->dev.parent);
adapter = vdpa_to_adapter(vdpa_dev);
status_old = ifcvf_get_status(vf);
if (status_old == status)
return;
if ((status_old & VIRTIO_CONFIG_S_DRIVER_OK) &&
!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
ifcvf_stop_datapath(adapter);
ifcvf_free_irq(adapter, IFCVF_MAX_QUEUE_PAIRS * 2);
}
if (status == 0) {
ifcvf_reset_vring(adapter);
return;
}
if ((status & VIRTIO_CONFIG_S_DRIVER_OK) &&
!(status_old & VIRTIO_CONFIG_S_DRIVER_OK)) {
ret = ifcvf_request_irq(adapter);
@ -254,6 +241,29 @@ static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
ifcvf_set_status(vf, status);
}
static int ifcvf_vdpa_reset(struct vdpa_device *vdpa_dev)
{
struct ifcvf_adapter *adapter;
struct ifcvf_hw *vf;
u8 status_old;
vf = vdpa_to_vf(vdpa_dev);
adapter = vdpa_to_adapter(vdpa_dev);
status_old = ifcvf_get_status(vf);
if (status_old == 0)
return 0;
if (status_old & VIRTIO_CONFIG_S_DRIVER_OK) {
ifcvf_stop_datapath(adapter);
ifcvf_free_irq(adapter, vf->nr_vring);
}
ifcvf_reset_vring(adapter);
return 0;
}
static u16 ifcvf_vdpa_get_vq_num_max(struct vdpa_device *vdpa_dev)
{
return IFCVF_QUEUE_MAX;
@ -437,6 +447,7 @@ static const struct vdpa_config_ops ifc_vdpa_ops = {
.set_features = ifcvf_vdpa_set_features,
.get_status = ifcvf_vdpa_get_status,
.set_status = ifcvf_vdpa_set_status,
.reset = ifcvf_vdpa_reset,
.get_vq_num_max = ifcvf_vdpa_get_vq_num_max,
.get_vq_state = ifcvf_vdpa_get_vq_state,
.set_vq_state = ifcvf_vdpa_set_vq_state,
@ -458,50 +469,19 @@ static const struct vdpa_config_ops ifc_vdpa_ops = {
.get_vq_notification = ifcvf_get_vq_notification,
};
static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
static struct virtio_device_id id_table_net[] = {
{VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID},
{0},
};
static struct virtio_device_id id_table_blk[] = {
{VIRTIO_ID_BLOCK, VIRTIO_DEV_ANY_ID},
{0},
};
static u32 get_dev_type(struct pci_dev *pdev)
{
struct device *dev = &pdev->dev;
struct ifcvf_adapter *adapter;
struct ifcvf_hw *vf;
int ret, i;
ret = pcim_enable_device(pdev);
if (ret) {
IFCVF_ERR(pdev, "Failed to enable device\n");
return ret;
}
ret = pcim_iomap_regions(pdev, BIT(0) | BIT(2) | BIT(4),
IFCVF_DRIVER_NAME);
if (ret) {
IFCVF_ERR(pdev, "Failed to request MMIO region\n");
return ret;
}
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
if (ret) {
IFCVF_ERR(pdev, "No usable DMA configuration\n");
return ret;
}
ret = devm_add_action_or_reset(dev, ifcvf_free_irq_vectors, pdev);
if (ret) {
IFCVF_ERR(pdev,
"Failed for adding devres for freeing irq vectors\n");
return ret;
}
adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa,
dev, &ifc_vdpa_ops, NULL);
if (IS_ERR(adapter)) {
IFCVF_ERR(pdev, "Failed to allocate vDPA structure");
return PTR_ERR(adapter);
}
pci_set_master(pdev);
pci_set_drvdata(pdev, adapter);
vf = &adapter->vf;
u32 dev_type;
/* This drirver drives both modern virtio devices and transitional
* devices in modern mode.
@ -510,11 +490,42 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
* mode will not work for vDPA, this driver will not
* drive devices with legacy interface.
*/
if (pdev->device < 0x1040)
vf->dev_type = pdev->subsystem_device;
else
vf->dev_type = pdev->device - 0x1040;
if (pdev->device < 0x1040)
dev_type = pdev->subsystem_device;
else
dev_type = pdev->device - 0x1040;
return dev_type;
}
static int ifcvf_vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name)
{
struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
struct ifcvf_adapter *adapter;
struct pci_dev *pdev;
struct ifcvf_hw *vf;
struct device *dev;
int ret, i;
ifcvf_mgmt_dev = container_of(mdev, struct ifcvf_vdpa_mgmt_dev, mdev);
if (ifcvf_mgmt_dev->adapter)
return -EOPNOTSUPP;
pdev = ifcvf_mgmt_dev->pdev;
dev = &pdev->dev;
adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa,
dev, &ifc_vdpa_ops, name, false);
if (IS_ERR(adapter)) {
IFCVF_ERR(pdev, "Failed to allocate vDPA structure");
return PTR_ERR(adapter);
}
ifcvf_mgmt_dev->adapter = adapter;
pci_set_drvdata(pdev, ifcvf_mgmt_dev);
vf = &adapter->vf;
vf->dev_type = get_dev_type(pdev);
vf->base = pcim_iomap_table(pdev);
adapter->pdev = pdev;
@ -526,14 +537,15 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto err;
}
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++)
for (i = 0; i < vf->nr_vring; i++)
vf->vring[i].irq = -EINVAL;
vf->hw_features = ifcvf_get_hw_features(vf);
ret = vdpa_register_device(&adapter->vdpa, IFCVF_MAX_QUEUE_PAIRS * 2);
adapter->vdpa.mdev = &ifcvf_mgmt_dev->mdev;
ret = _vdpa_register_device(&adapter->vdpa, vf->nr_vring);
if (ret) {
IFCVF_ERR(pdev, "Failed to register ifcvf to vdpa bus");
IFCVF_ERR(pdev, "Failed to register to vDPA bus");
goto err;
}
@ -544,11 +556,100 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
return ret;
}
static void ifcvf_vdpa_dev_del(struct vdpa_mgmt_dev *mdev, struct vdpa_device *dev)
{
struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
ifcvf_mgmt_dev = container_of(mdev, struct ifcvf_vdpa_mgmt_dev, mdev);
_vdpa_unregister_device(dev);
ifcvf_mgmt_dev->adapter = NULL;
}
static const struct vdpa_mgmtdev_ops ifcvf_vdpa_mgmt_dev_ops = {
.dev_add = ifcvf_vdpa_dev_add,
.dev_del = ifcvf_vdpa_dev_del
};
static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
struct device *dev = &pdev->dev;
u32 dev_type;
int ret;
ifcvf_mgmt_dev = kzalloc(sizeof(struct ifcvf_vdpa_mgmt_dev), GFP_KERNEL);
if (!ifcvf_mgmt_dev) {
IFCVF_ERR(pdev, "Failed to alloc memory for the vDPA management device\n");
return -ENOMEM;
}
dev_type = get_dev_type(pdev);
switch (dev_type) {
case VIRTIO_ID_NET:
ifcvf_mgmt_dev->mdev.id_table = id_table_net;
break;
case VIRTIO_ID_BLOCK:
ifcvf_mgmt_dev->mdev.id_table = id_table_blk;
break;
default:
IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", dev_type);
ret = -EOPNOTSUPP;
goto err;
}
ifcvf_mgmt_dev->mdev.ops = &ifcvf_vdpa_mgmt_dev_ops;
ifcvf_mgmt_dev->mdev.device = dev;
ifcvf_mgmt_dev->pdev = pdev;
ret = pcim_enable_device(pdev);
if (ret) {
IFCVF_ERR(pdev, "Failed to enable device\n");
goto err;
}
ret = pcim_iomap_regions(pdev, BIT(0) | BIT(2) | BIT(4),
IFCVF_DRIVER_NAME);
if (ret) {
IFCVF_ERR(pdev, "Failed to request MMIO region\n");
goto err;
}
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
if (ret) {
IFCVF_ERR(pdev, "No usable DMA configuration\n");
goto err;
}
ret = devm_add_action_or_reset(dev, ifcvf_free_irq_vectors, pdev);
if (ret) {
IFCVF_ERR(pdev,
"Failed for adding devres for freeing irq vectors\n");
goto err;
}
pci_set_master(pdev);
ret = vdpa_mgmtdev_register(&ifcvf_mgmt_dev->mdev);
if (ret) {
IFCVF_ERR(pdev,
"Failed to initialize the management interfaces\n");
goto err;
}
return 0;
err:
kfree(ifcvf_mgmt_dev);
return ret;
}
static void ifcvf_remove(struct pci_dev *pdev)
{
struct ifcvf_adapter *adapter = pci_get_drvdata(pdev);
struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
vdpa_unregister_device(&adapter->vdpa);
ifcvf_mgmt_dev = pci_get_drvdata(pdev);
vdpa_mgmtdev_unregister(&ifcvf_mgmt_dev->mdev);
kfree(ifcvf_mgmt_dev);
}
static struct pci_device_id ifcvf_pci_ids[] = {

26
drivers/vdpa/mlx5/core/mlx5_vdpa.h
View File

@ -5,7 +5,7 @@
#define __MLX5_VDPA_H__
#include <linux/etherdevice.h>
#include <linux/if_vlan.h>
#include <linux/vringh.h>
#include <linux/vdpa.h>
#include <linux/mlx5/driver.h>
@ -48,6 +48,26 @@ struct mlx5_vdpa_resources {
bool valid;
};
struct mlx5_control_vq {
struct vhost_iotlb *iotlb;
/* spinlock to synchronize iommu table */
spinlock_t iommu_lock;
struct vringh vring;
bool ready;
u64 desc_addr;
u64 device_addr;
u64 driver_addr;
struct vdpa_callback event_cb;
struct vringh_kiov riov;
struct vringh_kiov wiov;
unsigned short head;
};
struct mlx5_ctrl_wq_ent {
struct work_struct work;
struct mlx5_vdpa_dev *mvdev;
};
struct mlx5_vdpa_dev {
struct vdpa_device vdev;
struct mlx5_core_dev *mdev;
@ -57,9 +77,12 @@ struct mlx5_vdpa_dev {
u64 actual_features;
u8 status;
u32 max_vqs;
u16 max_idx;
u32 generation;
struct mlx5_vdpa_mr mr;
struct mlx5_control_vq cvq;
struct workqueue_struct *wq;
};
int mlx5_vdpa_alloc_pd(struct mlx5_vdpa_dev *dev, u32 *pdn, u16 uid);
@ -68,6 +91,7 @@ int mlx5_vdpa_get_null_mkey(struct mlx5_vdpa_dev *dev, u32 *null_mkey);
int mlx5_vdpa_create_tis(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tisn);
void mlx5_vdpa_destroy_tis(struct mlx5_vdpa_dev *mvdev, u32 tisn);
int mlx5_vdpa_create_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 *rqtn);
int mlx5_vdpa_modify_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 rqtn);
void mlx5_vdpa_destroy_rqt(struct mlx5_vdpa_dev *mvdev, u32 rqtn);
int mlx5_vdpa_create_tir(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tirn);
void mlx5_vdpa_destroy_tir(struct mlx5_vdpa_dev *mvdev, u32 tirn);

81
drivers/vdpa/mlx5/core/mr.c
View File

@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2020 Mellanox Technologies Ltd. */
#include <linux/vhost_types.h>
#include <linux/vdpa.h>
#include <linux/gcd.h>
#include <linux/string.h>
@ -451,33 +452,30 @@ static void destroy_dma_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_mr *mr)
mlx5_vdpa_destroy_mkey(mvdev, &mr->mkey);
}
static int _mlx5_vdpa_create_mr(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *iotlb)
static int dup_iotlb(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *src)
{
struct mlx5_vdpa_mr *mr = &mvdev->mr;
struct vhost_iotlb_map *map;
u64 start = 0, last = ULLONG_MAX;
int err;
if (mr->initialized)
return 0;
if (!src) {
err = vhost_iotlb_add_range(mvdev->cvq.iotlb, start, last, start, VHOST_ACCESS_RW);
return err;
}
if (iotlb)
err = create_user_mr(mvdev, iotlb);
else
err = create_dma_mr(mvdev, mr);
if (!err)
mr->initialized = true;
return err;
for (map = vhost_iotlb_itree_first(src, start, last); map;
map = vhost_iotlb_itree_next(map, start, last)) {
err = vhost_iotlb_add_range(mvdev->cvq.iotlb, map->start, map->last,
map->addr, map->perm);
if (err)
return err;
}
return 0;
}
int mlx5_vdpa_create_mr(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *iotlb)
static void prune_iotlb(struct mlx5_vdpa_dev *mvdev)
{
int err;
mutex_lock(&mvdev->mr.mkey_mtx);
err = _mlx5_vdpa_create_mr(mvdev, iotlb);
mutex_unlock(&mvdev->mr.mkey_mtx);
return err;
vhost_iotlb_del_range(mvdev->cvq.iotlb, 0, ULLONG_MAX);
}
static void destroy_user_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_mr *mr)
@ -501,6 +499,7 @@ void mlx5_vdpa_destroy_mr(struct mlx5_vdpa_dev *mvdev)
if (!mr->initialized)
goto out;
prune_iotlb(mvdev);
if (mr->user_mr)
destroy_user_mr(mvdev, mr);
else
@ -512,6 +511,48 @@ void mlx5_vdpa_destroy_mr(struct mlx5_vdpa_dev *mvdev)
mutex_unlock(&mr->mkey_mtx);
}
static int _mlx5_vdpa_create_mr(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *iotlb)
{
struct mlx5_vdpa_mr *mr = &mvdev->mr;
int err;
if (mr->initialized)
return 0;
if (iotlb)
err = create_user_mr(mvdev, iotlb);
else
err = create_dma_mr(mvdev, mr);
if (err)
return err;
err = dup_iotlb(mvdev, iotlb);
if (err)
goto out_err;
mr->initialized = true;
return 0;
out_err:
if (iotlb)
destroy_user_mr(mvdev, mr);
else
destroy_dma_mr(mvdev, mr);
return err;
}
int mlx5_vdpa_create_mr(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *iotlb)
{
int err;
mutex_lock(&mvdev->mr.mkey_mtx);
err = _mlx5_vdpa_create_mr(mvdev, iotlb);
mutex_unlock(&mvdev->mr.mkey_mtx);
return err;
}
int mlx5_vdpa_handle_set_map(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *iotlb,
bool *change_map)
{

35
drivers/vdpa/mlx5/core/resources.c
View File

@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2020 Mellanox Technologies Ltd. */
#include <linux/iova.h>
#include <linux/mlx5/driver.h>
#include "mlx5_vdpa.h"
@ -128,6 +129,16 @@ int mlx5_vdpa_create_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 *
return err;
}
int mlx5_vdpa_modify_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 rqtn)
{
u32 out[MLX5_ST_SZ_DW(create_rqt_out)] = {};
MLX5_SET(modify_rqt_in, in, uid, mvdev->res.uid);
MLX5_SET(modify_rqt_in, in, rqtn, rqtn);
MLX5_SET(modify_rqt_in, in, opcode, MLX5_CMD_OP_MODIFY_RQT);
return mlx5_cmd_exec(mvdev->mdev, in, inlen, out, sizeof(out));
}
void mlx5_vdpa_destroy_rqt(struct mlx5_vdpa_dev *mvdev, u32 rqtn)
{
u32 in[MLX5_ST_SZ_DW(destroy_rqt_in)] = {};
@ -221,6 +232,22 @@ int mlx5_vdpa_destroy_mkey(struct mlx5_vdpa_dev *mvdev, struct mlx5_core_mkey *m
return mlx5_cmd_exec_in(mvdev->mdev, destroy_mkey, in);
}
static int init_ctrl_vq(struct mlx5_vdpa_dev *mvdev)
{
mvdev->cvq.iotlb = vhost_iotlb_alloc(0, 0);
if (!mvdev->cvq.iotlb)
return -ENOMEM;
vringh_set_iotlb(&mvdev->cvq.vring, mvdev->cvq.iotlb, &mvdev->cvq.iommu_lock);
return 0;
}
static void cleanup_ctrl_vq(struct mlx5_vdpa_dev *mvdev)
{
vhost_iotlb_free(mvdev->cvq.iotlb);
}
int mlx5_vdpa_alloc_resources(struct mlx5_vdpa_dev *mvdev)
{
u64 offset = MLX5_CAP64_DEV_VDPA_EMULATION(mvdev->mdev, doorbell_bar_offset);
@ -260,10 +287,17 @@ int mlx5_vdpa_alloc_resources(struct mlx5_vdpa_dev *mvdev)
err = -ENOMEM;
goto err_key;
}
err = init_ctrl_vq(mvdev);
if (err)
goto err_ctrl;
res->valid = true;
return 0;
err_ctrl:
iounmap(res->kick_addr);
err_key:
dealloc_pd(mvdev, res->pdn, res->uid);
err_pd:
@ -282,6 +316,7 @@ void mlx5_vdpa_free_resources(struct mlx5_vdpa_dev *mvdev)
if (!res->valid)
return;
cleanup_ctrl_vq(mvdev);
iounmap(res->kick_addr);
res->kick_addr = NULL;
dealloc_pd(mvdev, res->pdn, res->uid);

555
drivers/vdpa/mlx5/net/mlx5_vnet.c
View File

@ -45,6 +45,8 @@ MODULE_LICENSE("Dual BSD/GPL");
(VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_DRIVER_OK | \
VIRTIO_CONFIG_S_FEATURES_OK | VIRTIO_CONFIG_S_NEEDS_RESET | VIRTIO_CONFIG_S_FAILED)
#define MLX5_FEATURE(_mvdev, _feature) (!!((_mvdev)->actual_features & BIT_ULL(_feature)))
struct mlx5_vdpa_net_resources {
u32 tisn;
u32 tdn;
@ -90,7 +92,6 @@ struct mlx5_vq_restore_info {
u16 avail_index;
u16 used_index;
bool ready;
struct vdpa_callback cb;
bool restore;
};
@ -100,7 +101,6 @@ struct mlx5_vdpa_virtqueue {
u64 device_addr;
u64 driver_addr;
u32 num_ent;
struct vdpa_callback event_cb;
/* Resources for implementing the notification channel from the device
* to the driver. fwqp is the firmware end of an RC connection; the
@ -135,11 +135,20 @@ struct mlx5_vdpa_virtqueue {
*/
#define MLX5_MAX_SUPPORTED_VQS 16
static bool is_index_valid(struct mlx5_vdpa_dev *mvdev, u16 idx)
{
if (unlikely(idx > mvdev->max_idx))
return false;
return true;
}
struct mlx5_vdpa_net {
struct mlx5_vdpa_dev mvdev;
struct mlx5_vdpa_net_resources res;
struct virtio_net_config config;
struct mlx5_vdpa_virtqueue vqs[MLX5_MAX_SUPPORTED_VQS];
struct vdpa_callback event_cbs[MLX5_MAX_SUPPORTED_VQS + 1];
/* Serialize vq resources creation and destruction. This is required
* since memory map might change and we need to destroy and create
@ -151,15 +160,18 @@ struct mlx5_vdpa_net {
struct mlx5_flow_handle *rx_rule;
bool setup;
u16 mtu;
u32 cur_num_vqs;
};
static void free_resources(struct mlx5_vdpa_net *ndev);
static void init_mvqs(struct mlx5_vdpa_net *ndev);
static int setup_driver(struct mlx5_vdpa_net *ndev);
static int setup_driver(struct mlx5_vdpa_dev *mvdev);
static void teardown_driver(struct mlx5_vdpa_net *ndev);
static bool mlx5_vdpa_debug;
#define MLX5_CVQ_MAX_ENT 16
#define MLX5_LOG_VIO_FLAG(_feature) \
do { \
if (features & BIT_ULL(_feature)) \
@ -172,11 +184,41 @@ static bool mlx5_vdpa_debug;
mlx5_vdpa_info(mvdev, "%s\n", #_status); \
} while (0)
/* TODO: cross-endian support */
static inline bool mlx5_vdpa_is_little_endian(struct mlx5_vdpa_dev *mvdev)
{
return virtio_legacy_is_little_endian() ||
(mvdev->actual_features & BIT_ULL(VIRTIO_F_VERSION_1));
}
static u16 mlx5vdpa16_to_cpu(struct mlx5_vdpa_dev *mvdev, __virtio16 val)
{
return __virtio16_to_cpu(mlx5_vdpa_is_little_endian(mvdev), val);
}
static __virtio16 cpu_to_mlx5vdpa16(struct mlx5_vdpa_dev *mvdev, u16 val)
{
return __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev), val);
}
static inline u32 mlx5_vdpa_max_qps(int max_vqs)
{
return max_vqs / 2;
}
static u16 ctrl_vq_idx(struct mlx5_vdpa_dev *mvdev)
{
if (!(mvdev->actual_features & BIT_ULL(VIRTIO_NET_F_MQ)))
return 2;
return 2 * mlx5_vdpa_max_qps(mvdev->max_vqs);
}
static bool is_ctrl_vq_idx(struct mlx5_vdpa_dev *mvdev, u16 idx)
{
return idx == ctrl_vq_idx(mvdev);
}
static void print_status(struct mlx5_vdpa_dev *mvdev, u8 status, bool set)
{
if (status & ~VALID_STATUS_MASK)
@ -481,6 +523,10 @@ static int mlx5_vdpa_poll_one(struct mlx5_vdpa_cq *vcq)
static void mlx5_vdpa_handle_completions(struct mlx5_vdpa_virtqueue *mvq, int num)
{
struct mlx5_vdpa_net *ndev = mvq->ndev;
struct vdpa_callback *event_cb;
event_cb = &ndev->event_cbs[mvq->index];
mlx5_cq_set_ci(&mvq->cq.mcq);
/* make sure CQ cosumer update is visible to the hardware before updating
@ -488,8 +534,8 @@ static void mlx5_vdpa_handle_completions(struct mlx5_vdpa_virtqueue *mvq, int nu
*/
dma_wmb();
rx_post(&mvq->vqqp, num);
if (mvq->event_cb.callback)
mvq->event_cb.callback(mvq->event_cb.private);
if (event_cb->callback)
event_cb->callback(event_cb->private);
}
static void mlx5_vdpa_cq_comp(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe)
@ -1100,10 +1146,8 @@ static int setup_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq)
if (!mvq->num_ent)
return 0;
if (mvq->initialized) {
mlx5_vdpa_warn(&ndev->mvdev, "attempt re init\n");
return -EINVAL;
}
if (mvq->initialized)
return 0;
err = cq_create(ndev, idx, mvq->num_ent);
if (err)
@ -1190,19 +1234,20 @@ static void teardown_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *
static int create_rqt(struct mlx5_vdpa_net *ndev)
{
int log_max_rqt;
__be32 *list;
int max_rqt;
void *rqtc;
int inlen;
void *in;
int i, j;
int err;
log_max_rqt = min_t(int, 1, MLX5_CAP_GEN(ndev->mvdev.mdev, log_max_rqt_size));
if (log_max_rqt < 1)
max_rqt = min_t(int, MLX5_MAX_SUPPORTED_VQS / 2,
1 << MLX5_CAP_GEN(ndev->mvdev.mdev, log_max_rqt_size));
if (max_rqt < 1)
return -EOPNOTSUPP;
inlen = MLX5_ST_SZ_BYTES(create_rqt_in) + (1 << log_max_rqt) * MLX5_ST_SZ_BYTES(rq_num);
inlen = MLX5_ST_SZ_BYTES(create_rqt_in) + max_rqt * MLX5_ST_SZ_BYTES(rq_num);
in = kzalloc(inlen, GFP_KERNEL);
if (!in)
return -ENOMEM;
@ -1211,10 +1256,9 @@ static int create_rqt(struct mlx5_vdpa_net *ndev)
rqtc = MLX5_ADDR_OF(create_rqt_in, in, rqt_context);
MLX5_SET(rqtc, rqtc, list_q_type, MLX5_RQTC_LIST_Q_TYPE_VIRTIO_NET_Q);
MLX5_SET(rqtc, rqtc, rqt_max_size, 1 << log_max_rqt);
MLX5_SET(rqtc, rqtc, rqt_actual_size, 1);
MLX5_SET(rqtc, rqtc, rqt_max_size, max_rqt);
list = MLX5_ADDR_OF(rqtc, rqtc, rq_num[0]);
for (i = 0, j = 0; j < ndev->mvdev.max_vqs; j++) {
for (i = 0, j = 0; j < max_rqt; j++) {
if (!ndev->vqs[j].initialized)
continue;
@ -1223,6 +1267,7 @@ static int create_rqt(struct mlx5_vdpa_net *ndev)
i++;
}
}
MLX5_SET(rqtc, rqtc, rqt_actual_size, i);
err = mlx5_vdpa_create_rqt(&ndev->mvdev, in, inlen, &ndev->res.rqtn);
kfree(in);
@ -1232,6 +1277,52 @@ static int create_rqt(struct mlx5_vdpa_net *ndev)
return 0;
}
#define MLX5_MODIFY_RQT_NUM_RQS ((u64)1)
static int modify_rqt(struct mlx5_vdpa_net *ndev, int num)
{
__be32 *list;
int max_rqt;
void *rqtc;
int inlen;
void *in;
int i, j;
int err;
max_rqt = min_t(int, ndev->cur_num_vqs / 2,
1 << MLX5_CAP_GEN(ndev->mvdev.mdev, log_max_rqt_size));
if (max_rqt < 1)
return -EOPNOTSUPP;
inlen = MLX5_ST_SZ_BYTES(modify_rqt_in) + max_rqt * MLX5_ST_SZ_BYTES(rq_num);
in = kzalloc(inlen, GFP_KERNEL);
if (!in)
return -ENOMEM;
MLX5_SET(modify_rqt_in, in, uid, ndev->mvdev.res.uid);
MLX5_SET64(modify_rqt_in, in, bitmask, MLX5_MODIFY_RQT_NUM_RQS);
rqtc = MLX5_ADDR_OF(modify_rqt_in, in, ctx);
MLX5_SET(rqtc, rqtc, list_q_type, MLX5_RQTC_LIST_Q_TYPE_VIRTIO_NET_Q);
list = MLX5_ADDR_OF(rqtc, rqtc, rq_num[0]);
for (i = 0, j = 0; j < num; j++) {
if (!ndev->vqs[j].initialized)
continue;
if (!vq_is_tx(ndev->vqs[j].index)) {
list[i] = cpu_to_be32(ndev->vqs[j].virtq_id);
i++;
}
}
MLX5_SET(rqtc, rqtc, rqt_actual_size, i);
err = mlx5_vdpa_modify_rqt(&ndev->mvdev, in, inlen, ndev->res.rqtn);
kfree(in);
if (err)
return err;
return 0;
}
static void destroy_rqt(struct mlx5_vdpa_net *ndev)
{
mlx5_vdpa_destroy_rqt(&ndev->mvdev, ndev->res.rqtn);
@ -1345,12 +1436,206 @@ static void remove_fwd_to_tir(struct mlx5_vdpa_net *ndev)
ndev->rx_rule = NULL;
}
static virtio_net_ctrl_ack handle_ctrl_mac(struct mlx5_vdpa_dev *mvdev, u8 cmd)
{
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
struct mlx5_control_vq *cvq = &mvdev->cvq;
virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
struct mlx5_core_dev *pfmdev;
size_t read;
u8 mac[ETH_ALEN];
pfmdev = pci_get_drvdata(pci_physfn(mvdev->mdev->pdev));
switch (cmd) {
case VIRTIO_NET_CTRL_MAC_ADDR_SET:
read = vringh_iov_pull_iotlb(&cvq->vring, &cvq->riov, (void *)mac, ETH_ALEN);
if (read != ETH_ALEN)
break;
if (!memcmp(ndev->config.mac, mac, 6)) {
status = VIRTIO_NET_OK;
break;
}
if (!is_zero_ether_addr(ndev->config.mac)) {
if (mlx5_mpfs_del_mac(pfmdev, ndev->config.mac)) {
mlx5_vdpa_warn(mvdev, "failed to delete old MAC %pM from MPFS table\n",
ndev->config.mac);
break;
}
}
if (mlx5_mpfs_add_mac(pfmdev, mac)) {
mlx5_vdpa_warn(mvdev, "failed to insert new MAC %pM into MPFS table\n",
mac);
break;
}
memcpy(ndev->config.mac, mac, ETH_ALEN);
status = VIRTIO_NET_OK;
break;
default:
break;
}
return status;
}
static int change_num_qps(struct mlx5_vdpa_dev *mvdev, int newqps)
{
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
int cur_qps = ndev->cur_num_vqs / 2;
int err;
int i;
if (cur_qps > newqps) {
err = modify_rqt(ndev, 2 * newqps);
if (err)
return err;
for (i = ndev->cur_num_vqs - 1; i >= 2 * newqps; i--)
teardown_vq(ndev, &ndev->vqs[i]);
ndev->cur_num_vqs = 2 * newqps;
} else {
ndev->cur_num_vqs = 2 * newqps;
for (i = cur_qps * 2; i < 2 * newqps; i++) {
err = setup_vq(ndev, &ndev->vqs[i]);
if (err)
goto clean_added;
}
err = modify_rqt(ndev, 2 * newqps);
if (err)
goto clean_added;
}
return 0;
clean_added:
for (--i; i >= cur_qps; --i)
teardown_vq(ndev, &ndev->vqs[i]);
return err;
}
static virtio_net_ctrl_ack handle_ctrl_mq(struct mlx5_vdpa_dev *mvdev, u8 cmd)
{
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
struct mlx5_control_vq *cvq = &mvdev->cvq;
struct virtio_net_ctrl_mq mq;
size_t read;
u16 newqps;
switch (cmd) {
case VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET:
read = vringh_iov_pull_iotlb(&cvq->vring, &cvq->riov, (void *)&mq, sizeof(mq));
if (read != sizeof(mq))
break;
newqps = mlx5vdpa16_to_cpu(mvdev, mq.virtqueue_pairs);
if (ndev->cur_num_vqs == 2 * newqps) {
status = VIRTIO_NET_OK;
break;
}
if (newqps & (newqps - 1))
break;
if (!change_num_qps(mvdev, newqps))
status = VIRTIO_NET_OK;
break;
default:
break;
}
return status;
}
static void mlx5_cvq_kick_handler(struct work_struct *work)
{
virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
struct virtio_net_ctrl_hdr ctrl;
struct mlx5_ctrl_wq_ent *wqent;
struct mlx5_vdpa_dev *mvdev;
struct mlx5_control_vq *cvq;
struct mlx5_vdpa_net *ndev;
size_t read, write;
int err;
wqent = container_of(work, struct mlx5_ctrl_wq_ent, work);
mvdev = wqent->mvdev;
ndev = to_mlx5_vdpa_ndev(mvdev);
cvq = &mvdev->cvq;
if (!(ndev->mvdev.actual_features & BIT_ULL(VIRTIO_NET_F_CTRL_VQ)))
goto out;
if (!cvq->ready)
goto out;
while (true) {
err = vringh_getdesc_iotlb(&cvq->vring, &cvq->riov, &cvq->wiov, &cvq->head,
GFP_ATOMIC);
if (err <= 0)
break;
read = vringh_iov_pull_iotlb(&cvq->vring, &cvq->riov, &ctrl, sizeof(ctrl));
if (read != sizeof(ctrl))
break;
switch (ctrl.class) {
case VIRTIO_NET_CTRL_MAC:
status = handle_ctrl_mac(mvdev, ctrl.cmd);
break;
case VIRTIO_NET_CTRL_MQ:
status = handle_ctrl_mq(mvdev, ctrl.cmd);
break;
default:
break;
}
/* Make sure data is written before advancing index */
smp_wmb();
write = vringh_iov_push_iotlb(&cvq->vring, &cvq->wiov, &status, sizeof(status));
vringh_complete_iotlb(&cvq->vring, cvq->head, write);
vringh_kiov_cleanup(&cvq->riov);
vringh_kiov_cleanup(&cvq->wiov);
if (vringh_need_notify_iotlb(&cvq->vring))
vringh_notify(&cvq->vring);
}
out:
kfree(wqent);
}
static void mlx5_vdpa_kick_vq(struct vdpa_device *vdev, u16 idx)
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx];
struct mlx5_vdpa_virtqueue *mvq;
struct mlx5_ctrl_wq_ent *wqent;
if (!is_index_valid(mvdev, idx))
return;
if (unlikely(is_ctrl_vq_idx(mvdev, idx))) {
if (!mvdev->cvq.ready)
return;
wqent = kzalloc(sizeof(*wqent), GFP_ATOMIC);
if (!wqent)
return;
wqent->mvdev = mvdev;
INIT_WORK(&wqent->work, mlx5_cvq_kick_handler);
queue_work(mvdev->wq, &wqent->work);
return;
}
mvq = &ndev->vqs[idx];
if (unlikely(!mvq->ready))
return;
@ -1362,8 +1647,19 @@ static int mlx5_vdpa_set_vq_address(struct vdpa_device *vdev, u16 idx, u64 desc_
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx];
struct mlx5_vdpa_virtqueue *mvq;
if (!is_index_valid(mvdev, idx))
return -EINVAL;
if (is_ctrl_vq_idx(mvdev, idx)) {
mvdev->cvq.desc_addr = desc_area;
mvdev->cvq.device_addr = device_area;
mvdev->cvq.driver_addr = driver_area;
return 0;
}
mvq = &ndev->vqs[idx];
mvq->desc_addr = desc_area;
mvq->device_addr = device_area;
mvq->driver_addr = driver_area;
@ -1376,6 +1672,9 @@ static void mlx5_vdpa_set_vq_num(struct vdpa_device *vdev, u16 idx, u32 num)
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
struct mlx5_vdpa_virtqueue *mvq;
if (!is_index_valid(mvdev, idx) || is_ctrl_vq_idx(mvdev, idx))
return;
mvq = &ndev->vqs[idx];
mvq->num_ent = num;
}
@ -1384,17 +1683,46 @@ static void mlx5_vdpa_set_vq_cb(struct vdpa_device *vdev, u16 idx, struct vdpa_c
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
struct mlx5_vdpa_virtqueue *vq = &ndev->vqs[idx];
vq->event_cb = *cb;
ndev->event_cbs[idx] = *cb;
}
static void mlx5_cvq_notify(struct vringh *vring)
{
struct mlx5_control_vq *cvq = container_of(vring, struct mlx5_control_vq, vring);
if (!cvq->event_cb.callback)
return;
cvq->event_cb.callback(cvq->event_cb.private);
}
static void set_cvq_ready(struct mlx5_vdpa_dev *mvdev, bool ready)
{
struct mlx5_control_vq *cvq = &mvdev->cvq;
cvq->ready = ready;
if (!ready)
return;
cvq->vring.notify = mlx5_cvq_notify;
}
static void mlx5_vdpa_set_vq_ready(struct vdpa_device *vdev, u16 idx, bool ready)
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx];
struct mlx5_vdpa_virtqueue *mvq;
if (!is_index_valid(mvdev, idx))
return;
if (is_ctrl_vq_idx(mvdev, idx)) {
set_cvq_ready(mvdev, ready);
return;
}
mvq = &ndev->vqs[idx];
if (!ready)
suspend_vq(ndev, mvq);
@ -1405,9 +1733,14 @@ static bool mlx5_vdpa_get_vq_ready(struct vdpa_device *vdev, u16 idx)
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx];
return mvq->ready;
if (!is_index_valid(mvdev, idx))
return false;
if (is_ctrl_vq_idx(mvdev, idx))
return mvdev->cvq.ready;
return ndev->vqs[idx].ready;
}
static int mlx5_vdpa_set_vq_state(struct vdpa_device *vdev, u16 idx,
@ -1415,8 +1748,17 @@ static int mlx5_vdpa_set_vq_state(struct vdpa_device *vdev, u16 idx,
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx];
struct mlx5_vdpa_virtqueue *mvq;
if (!is_index_valid(mvdev, idx))
return -EINVAL;
if (is_ctrl_vq_idx(mvdev, idx)) {
mvdev->cvq.vring.last_avail_idx = state->split.avail_index;
return 0;
}
mvq = &ndev->vqs[idx];
if (mvq->fw_state == MLX5_VIRTIO_NET_Q_OBJECT_STATE_RDY) {
mlx5_vdpa_warn(mvdev, "can't modify available index\n");
return -EINVAL;
@ -1431,10 +1773,19 @@ static int mlx5_vdpa_get_vq_state(struct vdpa_device *vdev, u16 idx, struct vdpa
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx];
struct mlx5_vdpa_virtqueue *mvq;
struct mlx5_virtq_attr attr;
int err;
if (!is_index_valid(mvdev, idx))
return -EINVAL;
if (is_ctrl_vq_idx(mvdev, idx)) {
state->split.avail_index = mvdev->cvq.vring.last_avail_idx;
return 0;
}
mvq = &ndev->vqs[idx];
/* If the virtq object was destroyed, use the value saved at
* the last minute of suspend_vq. This caters for userspace
* that cares about emulating the index after vq is stopped.
@ -1491,10 +1842,14 @@ static u64 mlx5_vdpa_get_features(struct vdpa_device *vdev)
u16 dev_features;
dev_features = MLX5_CAP_DEV_VDPA_EMULATION(mvdev->mdev, device_features_bits_mask);
ndev->mvdev.mlx_features = mlx_to_vritio_features(dev_features);
ndev->mvdev.mlx_features |= mlx_to_vritio_features(dev_features);
if (MLX5_CAP_DEV_VDPA_EMULATION(mvdev->mdev, virtio_version_1_0))
ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_F_VERSION_1);
ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_F_ACCESS_PLATFORM);
ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_NET_F_CTRL_VQ);
ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR);
ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_NET_F_MQ);
print_features(mvdev, ndev->mvdev.mlx_features, false);
return ndev->mvdev.mlx_features;
}
@ -1507,17 +1862,29 @@ static int verify_min_features(struct mlx5_vdpa_dev *mvdev, u64 features)
return 0;
}
static int setup_virtqueues(struct mlx5_vdpa_net *ndev)
static int setup_virtqueues(struct mlx5_vdpa_dev *mvdev)
{
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
struct mlx5_control_vq *cvq = &mvdev->cvq;
int err;
int i;
for (i = 0; i < 2 * mlx5_vdpa_max_qps(ndev->mvdev.max_vqs); i++) {
for (i = 0; i < 2 * mlx5_vdpa_max_qps(mvdev->max_vqs); i++) {
err = setup_vq(ndev, &ndev->vqs[i]);
if (err)
goto err_vq;
}
if (mvdev->actual_features & BIT_ULL(VIRTIO_NET_F_CTRL_VQ)) {
err = vringh_init_iotlb(&cvq->vring, mvdev->actual_features,
MLX5_CVQ_MAX_ENT, false,
(struct vring_desc *)(uintptr_t)cvq->desc_addr,
(struct vring_avail *)(uintptr_t)cvq->driver_addr,
(struct vring_used *)(uintptr_t)cvq->device_addr);
if (err)
goto err_vq;
}
return 0;
err_vq:
@ -1541,16 +1908,22 @@ static void teardown_virtqueues(struct mlx5_vdpa_net *ndev)
}
}
/* TODO: cross-endian support */
static inline bool mlx5_vdpa_is_little_endian(struct mlx5_vdpa_dev *mvdev)
static void update_cvq_info(struct mlx5_vdpa_dev *mvdev)
{
return virtio_legacy_is_little_endian() ||
(mvdev->actual_features & BIT_ULL(VIRTIO_F_VERSION_1));
}
static __virtio16 cpu_to_mlx5vdpa16(struct mlx5_vdpa_dev *mvdev, u16 val)
{
return __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev), val);
if (MLX5_FEATURE(mvdev, VIRTIO_NET_F_CTRL_VQ)) {
if (MLX5_FEATURE(mvdev, VIRTIO_NET_F_MQ)) {
/* MQ supported. CVQ index is right above the last data virtqueue's */
mvdev->max_idx = mvdev->max_vqs;
} else {
/* Only CVQ supportted. data virtqueues occupy indices 0 and 1.
* CVQ gets index 2
*/
mvdev->max_idx = 2;
}
} else {
/* Two data virtqueues only: one for rx and one for tx */
mvdev->max_idx = 1;
}
}
static int mlx5_vdpa_set_features(struct vdpa_device *vdev, u64 features)
@ -1568,6 +1941,7 @@ static int mlx5_vdpa_set_features(struct vdpa_device *vdev, u64 features)
ndev->mvdev.actual_features = features & ndev->mvdev.mlx_features;
ndev->config.mtu = cpu_to_mlx5vdpa16(mvdev, ndev->mtu);
ndev->config.status |= cpu_to_mlx5vdpa16(mvdev, VIRTIO_NET_S_LINK_UP);
update_cvq_info(mvdev);
return err;
}
@ -1605,15 +1979,14 @@ static u8 mlx5_vdpa_get_status(struct vdpa_device *vdev)
static int save_channel_info(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq)
{
struct mlx5_vq_restore_info *ri = &mvq->ri;
struct mlx5_virtq_attr attr;
struct mlx5_virtq_attr attr = {};
int err;
if (!mvq->initialized)
return 0;
err = query_virtqueue(ndev, mvq, &attr);
if (err)
return err;
if (mvq->initialized) {
err = query_virtqueue(ndev, mvq, &attr);
if (err)
return err;
}
ri->avail_index = attr.available_index;
ri->used_index = attr.used_index;
@ -1622,7 +1995,6 @@ static int save_channel_info(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqu
ri->desc_addr = mvq->desc_addr;
ri->device_addr = mvq->device_addr;
ri->driver_addr = mvq->driver_addr;
ri->cb = mvq->event_cb;
ri->restore = true;
return 0;
}
@ -1667,12 +2039,12 @@ static void restore_channels_info(struct mlx5_vdpa_net *ndev)
mvq->desc_addr = ri->desc_addr;
mvq->device_addr = ri->device_addr;
mvq->driver_addr = ri->driver_addr;
mvq->event_cb = ri->cb;
}
}
static int mlx5_vdpa_change_map(struct mlx5_vdpa_net *ndev, struct vhost_iotlb *iotlb)
static int mlx5_vdpa_change_map(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *iotlb)
{
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
int err;
suspend_vqs(ndev);
@ -1681,58 +2053,59 @@ static int mlx5_vdpa_change_map(struct mlx5_vdpa_net *ndev, struct vhost_iotlb *
goto err_mr;
teardown_driver(ndev);
mlx5_vdpa_destroy_mr(&ndev->mvdev);
err = mlx5_vdpa_create_mr(&ndev->mvdev, iotlb);
mlx5_vdpa_destroy_mr(mvdev);
err = mlx5_vdpa_create_mr(mvdev, iotlb);
if (err)
goto err_mr;
if (!(ndev->mvdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
if (!(mvdev->status & VIRTIO_CONFIG_S_DRIVER_OK))
return 0;
restore_channels_info(ndev);
err = setup_driver(ndev);
err = setup_driver(mvdev);
if (err)
goto err_setup;
return 0;
err_setup:
mlx5_vdpa_destroy_mr(&ndev->mvdev);
mlx5_vdpa_destroy_mr(mvdev);
err_mr:
return err;
}
static int setup_driver(struct mlx5_vdpa_net *ndev)
static int setup_driver(struct mlx5_vdpa_dev *mvdev)
{
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
int err;
mutex_lock(&ndev->reslock);
if (ndev->setup) {
mlx5_vdpa_warn(&ndev->mvdev, "setup driver called for already setup driver\n");
mlx5_vdpa_warn(mvdev, "setup driver called for already setup driver\n");
err = 0;
goto out;
}
err = setup_virtqueues(ndev);
err = setup_virtqueues(mvdev);
if (err) {
mlx5_vdpa_warn(&ndev->mvdev, "setup_virtqueues\n");
mlx5_vdpa_warn(mvdev, "setup_virtqueues\n");
goto out;
}
err = create_rqt(ndev);
if (err) {
mlx5_vdpa_warn(&ndev->mvdev, "create_rqt\n");
mlx5_vdpa_warn(mvdev, "create_rqt\n");
goto err_rqt;
}
err = create_tir(ndev);
if (err) {
mlx5_vdpa_warn(&ndev->mvdev, "create_tir\n");
mlx5_vdpa_warn(mvdev, "create_tir\n");
goto err_tir;
}
err = add_fwd_to_tir(ndev);
if (err) {
mlx5_vdpa_warn(&ndev->mvdev, "add_fwd_to_tir\n");
mlx5_vdpa_warn(mvdev, "add_fwd_to_tir\n");
goto err_fwd;
}
ndev->setup = true;
@ -1781,24 +2154,10 @@ static void mlx5_vdpa_set_status(struct vdpa_device *vdev, u8 status)
int err;
print_status(mvdev, status, true);
if (!status) {
mlx5_vdpa_info(mvdev, "performing device reset\n");
teardown_driver(ndev);
clear_vqs_ready(ndev);
mlx5_vdpa_destroy_mr(&ndev->mvdev);
ndev->mvdev.status = 0;
ndev->mvdev.mlx_features = 0;
++mvdev->generation;
if (MLX5_CAP_GEN(mvdev->mdev, umem_uid_0)) {
if (mlx5_vdpa_create_mr(mvdev, NULL))
mlx5_vdpa_warn(mvdev, "create MR failed\n");
}
return;
}
if ((status ^ ndev->mvdev.status) & VIRTIO_CONFIG_S_DRIVER_OK) {
if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
err = setup_driver(ndev);
err = setup_driver(mvdev);
if (err) {
mlx5_vdpa_warn(mvdev, "failed to setup driver\n");
goto err_setup;
@ -1817,6 +2176,29 @@ static void mlx5_vdpa_set_status(struct vdpa_device *vdev, u8 status)
ndev->mvdev.status |= VIRTIO_CONFIG_S_FAILED;
}
static int mlx5_vdpa_reset(struct vdpa_device *vdev)
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
print_status(mvdev, 0, true);
mlx5_vdpa_info(mvdev, "performing device reset\n");
teardown_driver(ndev);
clear_vqs_ready(ndev);
mlx5_vdpa_destroy_mr(&ndev->mvdev);
ndev->mvdev.status = 0;
ndev->mvdev.mlx_features = 0;
memset(ndev->event_cbs, 0, sizeof(ndev->event_cbs));
ndev->mvdev.actual_features = 0;
++mvdev->generation;
if (MLX5_CAP_GEN(mvdev->mdev, umem_uid_0)) {
if (mlx5_vdpa_create_mr(mvdev, NULL))
mlx5_vdpa_warn(mvdev, "create MR failed\n");
}
return 0;
}
static size_t mlx5_vdpa_get_config_size(struct vdpa_device *vdev)
{
return sizeof(struct virtio_net_config);
@ -1848,7 +2230,6 @@ static u32 mlx5_vdpa_get_generation(struct vdpa_device *vdev)
static int mlx5_vdpa_set_map(struct vdpa_device *vdev, struct vhost_iotlb *iotlb)
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
bool change_map;
int err;
@ -1859,7 +2240,7 @@ static int mlx5_vdpa_set_map(struct vdpa_device *vdev, struct vhost_iotlb *iotlb
}
if (change_map)
return mlx5_vdpa_change_map(ndev, iotlb);
return mlx5_vdpa_change_map(mvdev, iotlb);
return 0;
}
@ -1889,6 +2270,9 @@ static struct vdpa_notification_area mlx5_get_vq_notification(struct vdpa_device
struct mlx5_vdpa_net *ndev;
phys_addr_t addr;
if (!is_index_valid(mvdev, idx) || is_ctrl_vq_idx(mvdev, idx))
return ret;
/* If SF BAR size is smaller than PAGE_SIZE, do not use direct
* notification to avoid the risk of mapping pages that contain BAR of more
* than one SF
@ -1928,6 +2312,7 @@ static const struct vdpa_config_ops mlx5_vdpa_ops = {
.get_vendor_id = mlx5_vdpa_get_vendor_id,
.get_status = mlx5_vdpa_get_status,
.set_status = mlx5_vdpa_set_status,
.reset = mlx5_vdpa_reset,
.get_config_size = mlx5_vdpa_get_config_size,
.get_config = mlx5_vdpa_get_config,
.set_config = mlx5_vdpa_set_config,
@ -2040,7 +2425,7 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name)
max_vqs = min_t(u32, max_vqs, MLX5_MAX_SUPPORTED_VQS);
ndev = vdpa_alloc_device(struct mlx5_vdpa_net, mvdev.vdev, mdev->device, &mlx5_vdpa_ops,
name);
name, false);
if (IS_ERR(ndev))
return PTR_ERR(ndev);
@ -2063,8 +2448,11 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name)
err = mlx5_mpfs_add_mac(pfmdev, config->mac);
if (err)
goto err_mtu;
ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_NET_F_MAC);
}
config->max_virtqueue_pairs = cpu_to_mlx5vdpa16(mvdev, mlx5_vdpa_max_qps(max_vqs));
mvdev->vdev.dma_dev = &mdev->pdev->dev;
err = mlx5_vdpa_alloc_resources(&ndev->mvdev);
if (err)
@ -2080,8 +2468,15 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name)
if (err)
goto err_mr;
mvdev->wq = create_singlethread_workqueue("mlx5_vdpa_ctrl_wq");
if (!mvdev->wq) {
err = -ENOMEM;
goto err_res2;
}
ndev->cur_num_vqs = 2 * mlx5_vdpa_max_qps(max_vqs);
mvdev->vdev.mdev = &mgtdev->mgtdev;
err = _vdpa_register_device(&mvdev->vdev, 2 * mlx5_vdpa_max_qps(max_vqs));
err = _vdpa_register_device(&mvdev->vdev, ndev->cur_num_vqs + 1);
if (err)
goto err_reg;
@ -2089,6 +2484,8 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name)
return 0;
err_reg:
destroy_workqueue(mvdev->wq);
err_res2:
free_resources(ndev);
err_mr:
mlx5_vdpa_destroy_mr(mvdev);
@ -2106,7 +2503,9 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name)
static void mlx5_vdpa_dev_del(struct vdpa_mgmt_dev *v_mdev, struct vdpa_device *dev)
{
struct mlx5_vdpa_mgmtdev *mgtdev = container_of(v_mdev, struct mlx5_vdpa_mgmtdev, mgtdev);
struct mlx5_vdpa_dev *mvdev = to_mvdev(dev);
destroy_workqueue(mvdev->wq);
_vdpa_unregister_device(dev);
mgtdev->ndev = NULL;
}

9
drivers/vdpa/vdpa.c
View File

@ -69,6 +69,7 @@ static void vdpa_release_dev(struct device *d)
* @config: the bus operations that is supported by this device
* @size: size of the parent structure that contains private data
* @name: name of the vdpa device; optional.
* @use_va: indicate whether virtual address must be used by this device
*
* Driver should use vdpa_alloc_device() wrapper macro instead of
* using this directly.
@ -78,7 +79,8 @@ static void vdpa_release_dev(struct device *d)
*/
struct vdpa_device *__vdpa_alloc_device(struct device *parent,
const struct vdpa_config_ops *config,
size_t size, const char *name)
size_t size, const char *name,
bool use_va)
{
struct vdpa_device *vdev;
int err = -EINVAL;
@ -89,6 +91,10 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent,
if (!!config->dma_map != !!config->dma_unmap)
goto err;
/* It should only work for the device that use on-chip IOMMU */
if (use_va && !(config->dma_map || config->set_map))
goto err;
err = -ENOMEM;
vdev = kzalloc(size, GFP_KERNEL);
if (!vdev)
@ -104,6 +110,7 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent,
vdev->index = err;
vdev->config = config;
vdev->features_valid = false;
vdev->use_va = use_va;
if (name)
err = dev_set_name(&vdev->dev, "%s", name);

29
drivers/vdpa/vdpa_sim/vdpa_sim.c
View File

@ -92,7 +92,7 @@ static void vdpasim_vq_reset(struct vdpasim *vdpasim,
vq->vring.notify = NULL;
}
static void vdpasim_reset(struct vdpasim *vdpasim)
static void vdpasim_do_reset(struct vdpasim *vdpasim)
{
int i;
@ -137,7 +137,8 @@ static dma_addr_t vdpasim_map_range(struct vdpasim *vdpasim, phys_addr_t paddr,
int ret;
/* We set the limit_pfn to the maximum (ULONG_MAX - 1) */
iova = alloc_iova(&vdpasim->iova, size, ULONG_MAX - 1, true);
iova = alloc_iova(&vdpasim->iova, size >> iova_shift(&vdpasim->iova),
ULONG_MAX - 1, true);
if (!iova)
return DMA_MAPPING_ERROR;
@ -250,7 +251,7 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr)
ops = &vdpasim_config_ops;
vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops,
dev_attr->name);
dev_attr->name, false);
if (IS_ERR(vdpasim)) {
ret = PTR_ERR(vdpasim);
goto err_alloc;
@ -459,11 +460,21 @@ static void vdpasim_set_status(struct vdpa_device *vdpa, u8 status)
spin_lock(&vdpasim->lock);
vdpasim->status = status;
if (status == 0)
vdpasim_reset(vdpasim);
spin_unlock(&vdpasim->lock);
}
static int vdpasim_reset(struct vdpa_device *vdpa)
{
struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
spin_lock(&vdpasim->lock);
vdpasim->status = 0;
vdpasim_do_reset(vdpasim);
spin_unlock(&vdpasim->lock);
return 0;
}
static size_t vdpasim_get_config_size(struct vdpa_device *vdpa)
{
struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
@ -544,14 +555,14 @@ static int vdpasim_set_map(struct vdpa_device *vdpa,
}
static int vdpasim_dma_map(struct vdpa_device *vdpa, u64 iova, u64 size,
u64 pa, u32 perm)
u64 pa, u32 perm, void *opaque)
{
struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
int ret;
spin_lock(&vdpasim->iommu_lock);
ret = vhost_iotlb_add_range(vdpasim->iommu, iova, iova + size - 1, pa,
perm);
ret = vhost_iotlb_add_range_ctx(vdpasim->iommu, iova, iova + size - 1,
pa, perm, opaque);
spin_unlock(&vdpasim->iommu_lock);
return ret;
@ -607,6 +618,7 @@ static const struct vdpa_config_ops vdpasim_config_ops = {
.get_vendor_id = vdpasim_get_vendor_id,
.get_status = vdpasim_get_status,
.set_status = vdpasim_set_status,
.reset = vdpasim_reset,
.get_config_size = vdpasim_get_config_size,
.get_config = vdpasim_get_config,
.set_config = vdpasim_set_config,
@ -635,6 +647,7 @@ static const struct vdpa_config_ops vdpasim_batch_config_ops = {
.get_vendor_id = vdpasim_get_vendor_id,
.get_status = vdpasim_get_status,
.set_status = vdpasim_set_status,
.reset = vdpasim_reset,
.get_config_size = vdpasim_get_config_size,
.get_config = vdpasim_get_config,
.set_config = vdpasim_set_config,

5
drivers/vdpa/vdpa_user/Makefile Normal file
View File

@ -0,0 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
vduse-y := vduse_dev.o iova_domain.o
obj-$(CONFIG_VDPA_USER) += vduse.o

545
drivers/vdpa/vdpa_user/iova_domain.c Normal file
View File

@ -0,0 +1,545 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* MMU-based software IOTLB.
*
* Copyright (C) 2020-2021 Bytedance Inc. and/or its affiliates. All rights reserved.
*
* Author: Xie Yongji <xieyongji@bytedance.com>
*
*/
#include <linux/slab.h>
#include <linux/file.h>
#include <linux/anon_inodes.h>
#include <linux/highmem.h>
#include <linux/vmalloc.h>
#include <linux/vdpa.h>
#include "iova_domain.h"
static int vduse_iotlb_add_range(struct vduse_iova_domain *domain,
u64 start, u64 last,
u64 addr, unsigned int perm,
struct file *file, u64 offset)
{
struct vdpa_map_file *map_file;
int ret;
map_file = kmalloc(sizeof(*map_file), GFP_ATOMIC);
if (!map_file)
return -ENOMEM;
map_file->file = get_file(file);
map_file->offset = offset;
ret = vhost_iotlb_add_range_ctx(domain->iotlb, start, last,
addr, perm, map_file);
if (ret) {
fput(map_file->file);
kfree(map_file);
return ret;
}
return 0;
}
static void vduse_iotlb_del_range(struct vduse_iova_domain *domain,
u64 start, u64 last)
{
struct vdpa_map_file *map_file;
struct vhost_iotlb_map *map;
while ((map = vhost_iotlb_itree_first(domain->iotlb, start, last))) {
map_file = (struct vdpa_map_file *)map->opaque;
fput(map_file->file);
kfree(map_file);
vhost_iotlb_map_free(domain->iotlb, map);
}
}
int vduse_domain_set_map(struct vduse_iova_domain *domain,
struct vhost_iotlb *iotlb)
{
struct vdpa_map_file *map_file;
struct vhost_iotlb_map *map;
u64 start = 0ULL, last = ULLONG_MAX;
int ret;
spin_lock(&domain->iotlb_lock);
vduse_iotlb_del_range(domain, start, last);
for (map = vhost_iotlb_itree_first(iotlb, start, last); map;
map = vhost_iotlb_itree_next(map, start, last)) {
map_file = (struct vdpa_map_file *)map->opaque;
ret = vduse_iotlb_add_range(domain, map->start, map->last,
map->addr, map->perm,
map_file->file,
map_file->offset);
if (ret)
goto err;
}
spin_unlock(&domain->iotlb_lock);
return 0;
err:
vduse_iotlb_del_range(domain, start, last);
spin_unlock(&domain->iotlb_lock);
return ret;
}
void vduse_domain_clear_map(struct vduse_iova_domain *domain,
struct vhost_iotlb *iotlb)
{
struct vhost_iotlb_map *map;
u64 start = 0ULL, last = ULLONG_MAX;
spin_lock(&domain->iotlb_lock);
for (map = vhost_iotlb_itree_first(iotlb, start, last); map;
map = vhost_iotlb_itree_next(map, start, last)) {
vduse_iotlb_del_range(domain, map->start, map->last);
}
spin_unlock(&domain->iotlb_lock);
}
static int vduse_domain_map_bounce_page(struct vduse_iova_domain *domain,
u64 iova, u64 size, u64 paddr)
{
struct vduse_bounce_map *map;
u64 last = iova + size - 1;
while (iova <= last) {
map = &domain->bounce_maps[iova >> PAGE_SHIFT];
if (!map->bounce_page) {
map->bounce_page = alloc_page(GFP_ATOMIC);
if (!map->bounce_page)
return -ENOMEM;
}
map->orig_phys = paddr;
paddr += PAGE_SIZE;
iova += PAGE_SIZE;
}
return 0;
}
static void vduse_domain_unmap_bounce_page(struct vduse_iova_domain *domain,
u64 iova, u64 size)
{
struct vduse_bounce_map *map;
u64 last = iova + size - 1;
while (iova <= last) {
map = &domain->bounce_maps[iova >> PAGE_SHIFT];
map->orig_phys = INVALID_PHYS_ADDR;
iova += PAGE_SIZE;
}
}
static void do_bounce(phys_addr_t orig, void *addr, size_t size,
enum dma_data_direction dir)
{
unsigned long pfn = PFN_DOWN(orig);
unsigned int offset = offset_in_page(orig);
char *buffer;
unsigned int sz = 0;
while (size) {
sz = min_t(size_t, PAGE_SIZE - offset, size);
buffer = kmap_atomic(pfn_to_page(pfn));
if (dir == DMA_TO_DEVICE)
memcpy(addr, buffer + offset, sz);
else
memcpy(buffer + offset, addr, sz);
kunmap_atomic(buffer);
size -= sz;
pfn++;
addr += sz;
offset = 0;
}
}
static void vduse_domain_bounce(struct vduse_iova_domain *domain,
dma_addr_t iova, size_t size,
enum dma_data_direction dir)
{
struct vduse_bounce_map *map;
unsigned int offset;
void *addr;
size_t sz;
if (iova >= domain->bounce_size)
return;
while (size) {
map = &domain->bounce_maps[iova >> PAGE_SHIFT];
offset = offset_in_page(iova);
sz = min_t(size_t, PAGE_SIZE - offset, size);
if (WARN_ON(!map->bounce_page ||
map->orig_phys == INVALID_PHYS_ADDR))
return;
addr = page_address(map->bounce_page) + offset;
do_bounce(map->orig_phys + offset, addr, sz, dir);
size -= sz;
iova += sz;
}
}
static struct page *
vduse_domain_get_coherent_page(struct vduse_iova_domain *domain, u64 iova)
{
u64 start = iova & PAGE_MASK;
u64 last = start + PAGE_SIZE - 1;
struct vhost_iotlb_map *map;
struct page *page = NULL;
spin_lock(&domain->iotlb_lock);
map = vhost_iotlb_itree_first(domain->iotlb, start, last);
if (!map)
goto out;
page = pfn_to_page((map->addr + iova - map->start) >> PAGE_SHIFT);
get_page(page);
out:
spin_unlock(&domain->iotlb_lock);
return page;
}
static struct page *
vduse_domain_get_bounce_page(struct vduse_iova_domain *domain, u64 iova)
{
struct vduse_bounce_map *map;
struct page *page = NULL;
spin_lock(&domain->iotlb_lock);
map = &domain->bounce_maps[iova >> PAGE_SHIFT];
if (!map->bounce_page)
goto out;
page = map->bounce_page;
get_page(page);
out:
spin_unlock(&domain->iotlb_lock);
return page;
}
static void
vduse_domain_free_bounce_pages(struct vduse_iova_domain *domain)
{
struct vduse_bounce_map *map;
unsigned long pfn, bounce_pfns;
bounce_pfns = domain->bounce_size >> PAGE_SHIFT;
for (pfn = 0; pfn < bounce_pfns; pfn++) {
map = &domain->bounce_maps[pfn];
if (WARN_ON(map->orig_phys != INVALID_PHYS_ADDR))
continue;
if (!map->bounce_page)
continue;
__free_page(map->bounce_page);
map->bounce_page = NULL;
}
}
void vduse_domain_reset_bounce_map(struct vduse_iova_domain *domain)
{
if (!domain->bounce_map)
return;
spin_lock(&domain->iotlb_lock);
if (!domain->bounce_map)
goto unlock;
vduse_iotlb_del_range(domain, 0, domain->bounce_size - 1);
domain->bounce_map = 0;
unlock:
spin_unlock(&domain->iotlb_lock);
}
static int vduse_domain_init_bounce_map(struct vduse_iova_domain *domain)
{
int ret = 0;
if (domain->bounce_map)
return 0;
spin_lock(&domain->iotlb_lock);
if (domain->bounce_map)
goto unlock;
ret = vduse_iotlb_add_range(domain, 0, domain->bounce_size - 1,
0, VHOST_MAP_RW, domain->file, 0);
if (ret)
goto unlock;
domain->bounce_map = 1;
unlock:
spin_unlock(&domain->iotlb_lock);
return ret;
}
static dma_addr_t
vduse_domain_alloc_iova(struct iova_domain *iovad,
unsigned long size, unsigned long limit)
{
unsigned long shift = iova_shift(iovad);
unsigned long iova_len = iova_align(iovad, size) >> shift;
unsigned long iova_pfn;
/*
* Freeing non-power-of-two-sized allocations back into the IOVA caches
* will come back to bite us badly, so we have to waste a bit of space
* rounding up anything cacheable to make sure that can't happen. The
* order of the unadjusted size will still match upon freeing.
*/
if (iova_len < (1 << (IOVA_RANGE_CACHE_MAX_SIZE - 1)))
iova_len = roundup_pow_of_two(iova_len);
iova_pfn = alloc_iova_fast(iovad, iova_len, limit >> shift, true);
return iova_pfn << shift;
}
static void vduse_domain_free_iova(struct iova_domain *iovad,
dma_addr_t iova, size_t size)
{
unsigned long shift = iova_shift(iovad);
unsigned long iova_len = iova_align(iovad, size) >> shift;
free_iova_fast(iovad, iova >> shift, iova_len);
}
dma_addr_t vduse_domain_map_page(struct vduse_iova_domain *domain,
struct page *page, unsigned long offset,
size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
struct iova_domain *iovad = &domain->stream_iovad;
unsigned long limit = domain->bounce_size - 1;
phys_addr_t pa = page_to_phys(page) + offset;
dma_addr_t iova = vduse_domain_alloc_iova(iovad, size, limit);
if (!iova)
return DMA_MAPPING_ERROR;
if (vduse_domain_init_bounce_map(domain))
goto err;
if (vduse_domain_map_bounce_page(domain, (u64)iova, (u64)size, pa))
goto err;
if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)
vduse_domain_bounce(domain, iova, size, DMA_TO_DEVICE);
return iova;
err:
vduse_domain_free_iova(iovad, iova, size);
return DMA_MAPPING_ERROR;
}
void vduse_domain_unmap_page(struct vduse_iova_domain *domain,
dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir, unsigned long attrs)
{
struct iova_domain *iovad = &domain->stream_iovad;
if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)
vduse_domain_bounce(domain, dma_addr, size, DMA_FROM_DEVICE);
vduse_domain_unmap_bounce_page(domain, (u64)dma_addr, (u64)size);
vduse_domain_free_iova(iovad, dma_addr, size);
}
void *vduse_domain_alloc_coherent(struct vduse_iova_domain *domain,
size_t size, dma_addr_t *dma_addr,
gfp_t flag, unsigned long attrs)
{
struct iova_domain *iovad = &domain->consistent_iovad;
unsigned long limit = domain->iova_limit;
dma_addr_t iova = vduse_domain_alloc_iova(iovad, size, limit);
void *orig = alloc_pages_exact(size, flag);
if (!iova || !orig)
goto err;
spin_lock(&domain->iotlb_lock);
if (vduse_iotlb_add_range(domain, (u64)iova, (u64)iova + size - 1,
virt_to_phys(orig), VHOST_MAP_RW,
domain->file, (u64)iova)) {
spin_unlock(&domain->iotlb_lock);
goto err;
}
spin_unlock(&domain->iotlb_lock);
*dma_addr = iova;
return orig;
err:
*dma_addr = DMA_MAPPING_ERROR;
if (orig)
free_pages_exact(orig, size);
if (iova)
vduse_domain_free_iova(iovad, iova, size);
return NULL;
}
void vduse_domain_free_coherent(struct vduse_iova_domain *domain, size_t size,
void *vaddr, dma_addr_t dma_addr,
unsigned long attrs)
{
struct iova_domain *iovad = &domain->consistent_iovad;
struct vhost_iotlb_map *map;
struct vdpa_map_file *map_file;
phys_addr_t pa;
spin_lock(&domain->iotlb_lock);
map = vhost_iotlb_itree_first(domain->iotlb, (u64)dma_addr,
(u64)dma_addr + size - 1);
if (WARN_ON(!map)) {
spin_unlock(&domain->iotlb_lock);
return;
}
map_file = (struct vdpa_map_file *)map->opaque;
fput(map_file->file);
kfree(map_file);
pa = map->addr;
vhost_iotlb_map_free(domain->iotlb, map);
spin_unlock(&domain->iotlb_lock);
vduse_domain_free_iova(iovad, dma_addr, size);
free_pages_exact(phys_to_virt(pa), size);
}
static vm_fault_t vduse_domain_mmap_fault(struct vm_fault *vmf)
{
struct vduse_iova_domain *domain = vmf->vma->vm_private_data;
unsigned long iova = vmf->pgoff << PAGE_SHIFT;
struct page *page;
if (!domain)
return VM_FAULT_SIGBUS;
if (iova < domain->bounce_size)
page = vduse_domain_get_bounce_page(domain, iova);
else
page = vduse_domain_get_coherent_page(domain, iova);
if (!page)
return VM_FAULT_SIGBUS;
vmf->page = page;
return 0;
}
static const struct vm_operations_struct vduse_domain_mmap_ops = {
.fault = vduse_domain_mmap_fault,
};
static int vduse_domain_mmap(struct file *file, struct vm_area_struct *vma)
{
struct vduse_iova_domain *domain = file->private_data;
vma->vm_flags |= VM_DONTDUMP | VM_DONTEXPAND;
vma->vm_private_data = domain;
vma->vm_ops = &vduse_domain_mmap_ops;
return 0;
}
static int vduse_domain_release(struct inode *inode, struct file *file)
{
struct vduse_iova_domain *domain = file->private_data;
spin_lock(&domain->iotlb_lock);
vduse_iotlb_del_range(domain, 0, ULLONG_MAX);
vduse_domain_free_bounce_pages(domain);
spin_unlock(&domain->iotlb_lock);
put_iova_domain(&domain->stream_iovad);
put_iova_domain(&domain->consistent_iovad);
vhost_iotlb_free(domain->iotlb);
vfree(domain->bounce_maps);
kfree(domain);
return 0;
}
static const struct file_operations vduse_domain_fops = {
.owner = THIS_MODULE,
.mmap = vduse_domain_mmap,
.release = vduse_domain_release,
};
void vduse_domain_destroy(struct vduse_iova_domain *domain)
{
fput(domain->file);
}
struct vduse_iova_domain *
vduse_domain_create(unsigned long iova_limit, size_t bounce_size)
{
struct vduse_iova_domain *domain;
struct file *file;
struct vduse_bounce_map *map;
unsigned long pfn, bounce_pfns;
bounce_pfns = PAGE_ALIGN(bounce_size) >> PAGE_SHIFT;
if (iova_limit <= bounce_size)
return NULL;
domain = kzalloc(sizeof(*domain), GFP_KERNEL);
if (!domain)
return NULL;
domain->iotlb = vhost_iotlb_alloc(0, 0);
if (!domain->iotlb)
goto err_iotlb;
domain->iova_limit = iova_limit;
domain->bounce_size = PAGE_ALIGN(bounce_size);
domain->bounce_maps = vzalloc(bounce_pfns *
sizeof(struct vduse_bounce_map));
if (!domain->bounce_maps)
goto err_map;
for (pfn = 0; pfn < bounce_pfns; pfn++) {
map = &domain->bounce_maps[pfn];
map->orig_phys = INVALID_PHYS_ADDR;
}
file = anon_inode_getfile("[vduse-domain]", &vduse_domain_fops,
domain, O_RDWR);
if (IS_ERR(file))
goto err_file;
domain->file = file;
spin_lock_init(&domain->iotlb_lock);
init_iova_domain(&domain->stream_iovad,
PAGE_SIZE, IOVA_START_PFN);
init_iova_domain(&domain->consistent_iovad,
PAGE_SIZE, bounce_pfns);
return domain;
err_file:
vfree(domain->bounce_maps);
err_map:
vhost_iotlb_free(domain->iotlb);
err_iotlb:
kfree(domain);
return NULL;
}
int vduse_domain_init(void)
{
return iova_cache_get();
}
void vduse_domain_exit(void)
{
iova_cache_put();
}

73
drivers/vdpa/vdpa_user/iova_domain.h Normal file
View File

@ -0,0 +1,73 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* MMU-based software IOTLB.
*
* Copyright (C) 2020-2021 Bytedance Inc. and/or its affiliates. All rights reserved.
*
* Author: Xie Yongji <xieyongji@bytedance.com>
*
*/
#ifndef _VDUSE_IOVA_DOMAIN_H
#define _VDUSE_IOVA_DOMAIN_H
#include <linux/iova.h>
#include <linux/dma-mapping.h>
#include <linux/vhost_iotlb.h>
#define IOVA_START_PFN 1
#define INVALID_PHYS_ADDR (~(phys_addr_t)0)
struct vduse_bounce_map {
struct page *bounce_page;
u64 orig_phys;
};
struct vduse_iova_domain {
struct iova_domain stream_iovad;
struct iova_domain consistent_iovad;
struct vduse_bounce_map *bounce_maps;
size_t bounce_size;
unsigned long iova_limit;
int bounce_map;
struct vhost_iotlb *iotlb;
spinlock_t iotlb_lock;
struct file *file;
};
int vduse_domain_set_map(struct vduse_iova_domain *domain,
struct vhost_iotlb *iotlb);
void vduse_domain_clear_map(struct vduse_iova_domain *domain,
struct vhost_iotlb *iotlb);
dma_addr_t vduse_domain_map_page(struct vduse_iova_domain *domain,
struct page *page, unsigned long offset,
size_t size, enum dma_data_direction dir,
unsigned long attrs);
void vduse_domain_unmap_page(struct vduse_iova_domain *domain,
dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir, unsigned long attrs);
void *vduse_domain_alloc_coherent(struct vduse_iova_domain *domain,
size_t size, dma_addr_t *dma_addr,
gfp_t flag, unsigned long attrs);
void vduse_domain_free_coherent(struct vduse_iova_domain *domain, size_t size,
void *vaddr, dma_addr_t dma_addr,
unsigned long attrs);
void vduse_domain_reset_bounce_map(struct vduse_iova_domain *domain);
void vduse_domain_destroy(struct vduse_iova_domain *domain);
struct vduse_iova_domain *vduse_domain_create(unsigned long iova_limit,
size_t bounce_size);
int vduse_domain_init(void);
void vduse_domain_exit(void);
#endif /* _VDUSE_IOVA_DOMAIN_H */

1641
drivers/vdpa/vdpa_user/vduse_dev.c Normal file
View File

File diff suppressed because it is too large Load Diff

17
drivers/vdpa/virtio_pci/vp_vdpa.c
View File

@ -189,10 +189,20 @@ static void vp_vdpa_set_status(struct vdpa_device *vdpa, u8 status)
}
vp_modern_set_status(mdev, status);
}
if (!(status & VIRTIO_CONFIG_S_DRIVER_OK) &&
(s & VIRTIO_CONFIG_S_DRIVER_OK))
static int vp_vdpa_reset(struct vdpa_device *vdpa)
{
struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
u8 s = vp_vdpa_get_status(vdpa);
vp_modern_set_status(mdev, 0);
if (s & VIRTIO_CONFIG_S_DRIVER_OK)
vp_vdpa_free_irq(vp_vdpa);
return 0;
}
static u16 vp_vdpa_get_vq_num_max(struct vdpa_device *vdpa)
@ -398,6 +408,7 @@ static const struct vdpa_config_ops vp_vdpa_ops = {
.set_features = vp_vdpa_set_features,
.get_status = vp_vdpa_get_status,
.set_status = vp_vdpa_set_status,
.reset = vp_vdpa_reset,
.get_vq_num_max = vp_vdpa_get_vq_num_max,
.get_vq_state = vp_vdpa_get_vq_state,
.get_vq_notification = vp_vdpa_get_vq_notification,
@ -435,7 +446,7 @@ static int vp_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)
return ret;
vp_vdpa = vdpa_alloc_device(struct vp_vdpa, vdpa,
dev, &vp_vdpa_ops, NULL);
dev, &vp_vdpa_ops, NULL, false);
if (IS_ERR(vp_vdpa)) {
dev_err(dev, "vp_vdpa: Failed to allocate vDPA structure\n");
return PTR_ERR(vp_vdpa);

20
drivers/vhost/iotlb.c
View File

@ -36,19 +36,21 @@ void vhost_iotlb_map_free(struct vhost_iotlb *iotlb,
EXPORT_SYMBOL_GPL(vhost_iotlb_map_free);
/**
* vhost_iotlb_add_range - add a new range to vhost IOTLB
* vhost_iotlb_add_range_ctx - add a new range to vhost IOTLB
* @iotlb: the IOTLB
* @start: start of the IOVA range
* @last: last of IOVA range
* @addr: the address that is mapped to @start
* @perm: access permission of this range
* @opaque: the opaque pointer for the new mapping
*
* Returns an error last is smaller than start or memory allocation
* fails
*/
int vhost_iotlb_add_range(struct vhost_iotlb *iotlb,
u64 start, u64 last,
u64 addr, unsigned int perm)
int vhost_iotlb_add_range_ctx(struct vhost_iotlb *iotlb,
u64 start, u64 last,
u64 addr, unsigned int perm,
void *opaque)
{
struct vhost_iotlb_map *map;
@ -71,6 +73,7 @@ int vhost_iotlb_add_range(struct vhost_iotlb *iotlb,
map->last = last;
map->addr = addr;
map->perm = perm;
map->opaque = opaque;
iotlb->nmaps++;
vhost_iotlb_itree_insert(map, &iotlb->root);
@ -80,6 +83,15 @@ int vhost_iotlb_add_range(struct vhost_iotlb *iotlb,
return 0;
}
EXPORT_SYMBOL_GPL(vhost_iotlb_add_range_ctx);
int vhost_iotlb_add_range(struct vhost_iotlb *iotlb,
u64 start, u64 last,
u64 addr, unsigned int perm)
{
return vhost_iotlb_add_range_ctx(iotlb, start, last,
addr, perm, NULL);
}
EXPORT_SYMBOL_GPL(vhost_iotlb_add_range);
/**

14
drivers/vhost/scsi.c
View File

@ -1,24 +1,12 @@
// SPDX-License-Identifier: GPL-2.0+
/*******************************************************************************
* Vhost kernel TCM fabric driver for virtio SCSI initiators
*
* (C) Copyright 2010-2013 Datera, Inc.
* (C) Copyright 2010-2012 IBM Corp.
*
* Licensed to the Linux Foundation under the General Public License (GPL) version 2.
*
* Authors: Nicholas A. Bellinger <nab@daterainc.com>
* Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
****************************************************************************/
#include <linux/module.h>

188
drivers/vhost/vdpa.c
View File

@ -116,12 +116,13 @@ static void vhost_vdpa_unsetup_vq_irq(struct vhost_vdpa *v, u16 qid)
irq_bypass_unregister_producer(&vq->call_ctx.producer);
}
static void vhost_vdpa_reset(struct vhost_vdpa *v)
static int vhost_vdpa_reset(struct vhost_vdpa *v)
{
struct vdpa_device *vdpa = v->vdpa;
vdpa_reset(vdpa);
v->in_batch = 0;
return vdpa_reset(vdpa);
}
static long vhost_vdpa_get_device_id(struct vhost_vdpa *v, u8 __user *argp)
@ -157,7 +158,7 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
struct vdpa_device *vdpa = v->vdpa;
const struct vdpa_config_ops *ops = vdpa->config;
u8 status, status_old;
int nvqs = v->nvqs;
int ret, nvqs = v->nvqs;
u16 i;
if (copy_from_user(&status, statusp, sizeof(status)))
@ -172,7 +173,12 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
if (status != 0 && (ops->get_status(vdpa) & ~status) != 0)
return -EINVAL;
ops->set_status(vdpa, status);
if (status == 0) {
ret = ops->reset(vdpa);
if (ret)
return ret;
} else
ops->set_status(vdpa, status);
if ((status & VIRTIO_CONFIG_S_DRIVER_OK) && !(status_old & VIRTIO_CONFIG_S_DRIVER_OK))
for (i = 0; i < nvqs; i++)
@ -498,7 +504,7 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
return r;
}
static void vhost_vdpa_iotlb_unmap(struct vhost_vdpa *v, u64 start, u64 last)
static void vhost_vdpa_pa_unmap(struct vhost_vdpa *v, u64 start, u64 last)
{
struct vhost_dev *dev = &v->vdev;
struct vhost_iotlb *iotlb = dev->iotlb;
@ -507,19 +513,44 @@ static void vhost_vdpa_iotlb_unmap(struct vhost_vdpa *v, u64 start, u64 last)
unsigned long pfn, pinned;
while ((map = vhost_iotlb_itree_first(iotlb, start, last)) != NULL) {
pinned = map->size >> PAGE_SHIFT;
for (pfn = map->addr >> PAGE_SHIFT;
pinned = PFN_DOWN(map->size);
for (pfn = PFN_DOWN(map->addr);
pinned > 0; pfn++, pinned--) {
page = pfn_to_page(pfn);
if (map->perm & VHOST_ACCESS_WO)
set_page_dirty_lock(page);
unpin_user_page(page);
}
atomic64_sub(map->size >> PAGE_SHIFT, &dev->mm->pinned_vm);
atomic64_sub(PFN_DOWN(map->size), &dev->mm->pinned_vm);
vhost_iotlb_map_free(iotlb, map);
}
}
static void vhost_vdpa_va_unmap(struct vhost_vdpa *v, u64 start, u64 last)
{
struct vhost_dev *dev = &v->vdev;
struct vhost_iotlb *iotlb = dev->iotlb;
struct vhost_iotlb_map *map;
struct vdpa_map_file *map_file;
while ((map = vhost_iotlb_itree_first(iotlb, start, last)) != NULL) {
map_file = (struct vdpa_map_file *)map->opaque;
fput(map_file->file);
kfree(map_file);
vhost_iotlb_map_free(iotlb, map);
}
}
static void vhost_vdpa_iotlb_unmap(struct vhost_vdpa *v, u64 start, u64 last)
{
struct vdpa_device *vdpa = v->vdpa;
if (vdpa->use_va)
return vhost_vdpa_va_unmap(v, start, last);
return vhost_vdpa_pa_unmap(v, start, last);
}
static void vhost_vdpa_iotlb_free(struct vhost_vdpa *v)
{
struct vhost_dev *dev = &v->vdev;
@ -551,21 +582,21 @@ static int perm_to_iommu_flags(u32 perm)
return flags | IOMMU_CACHE;
}
static int vhost_vdpa_map(struct vhost_vdpa *v,
u64 iova, u64 size, u64 pa, u32 perm)
static int vhost_vdpa_map(struct vhost_vdpa *v, u64 iova,
u64 size, u64 pa, u32 perm, void *opaque)
{
struct vhost_dev *dev = &v->vdev;
struct vdpa_device *vdpa = v->vdpa;
const struct vdpa_config_ops *ops = vdpa->config;
int r = 0;
r = vhost_iotlb_add_range(dev->iotlb, iova, iova + size - 1,
pa, perm);
r = vhost_iotlb_add_range_ctx(dev->iotlb, iova, iova + size - 1,
pa, perm, opaque);
if (r)
return r;
if (ops->dma_map) {
r = ops->dma_map(vdpa, iova, size, pa, perm);
r = ops->dma_map(vdpa, iova, size, pa, perm, opaque);
} else if (ops->set_map) {
if (!v->in_batch)
r = ops->set_map(vdpa, dev->iotlb);
@ -573,13 +604,15 @@ static int vhost_vdpa_map(struct vhost_vdpa *v,
r = iommu_map(v->domain, iova, pa, size,
perm_to_iommu_flags(perm));
}
if (r)
if (r) {
vhost_iotlb_del_range(dev->iotlb, iova, iova + size - 1);
else
atomic64_add(size >> PAGE_SHIFT, &dev->mm->pinned_vm);
return r;
}
return r;
if (!vdpa->use_va)
atomic64_add(PFN_DOWN(size), &dev->mm->pinned_vm);
return 0;
}
static void vhost_vdpa_unmap(struct vhost_vdpa *v, u64 iova, u64 size)
@ -600,38 +633,78 @@ static void vhost_vdpa_unmap(struct vhost_vdpa *v, u64 iova, u64 size)
}
}
static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v,
struct vhost_iotlb_msg *msg)
static int vhost_vdpa_va_map(struct vhost_vdpa *v,
u64 iova, u64 size, u64 uaddr, u32 perm)
{
struct vhost_dev *dev = &v->vdev;
u64 offset, map_size, map_iova = iova;
struct vdpa_map_file *map_file;
struct vm_area_struct *vma;
int ret;
mmap_read_lock(dev->mm);
while (size) {
vma = find_vma(dev->mm, uaddr);
if (!vma) {
ret = -EINVAL;
break;
}
map_size = min(size, vma->vm_end - uaddr);
if (!(vma->vm_file && (vma->vm_flags & VM_SHARED) &&
!(vma->vm_flags & (VM_IO | VM_PFNMAP))))
goto next;
map_file = kzalloc(sizeof(*map_file), GFP_KERNEL);
if (!map_file) {
ret = -ENOMEM;
break;
}
offset = (vma->vm_pgoff << PAGE_SHIFT) + uaddr - vma->vm_start;
map_file->offset = offset;
map_file->file = get_file(vma->vm_file);
ret = vhost_vdpa_map(v, map_iova, map_size, uaddr,
perm, map_file);
if (ret) {
fput(map_file->file);
kfree(map_file);
break;
}
next:
size -= map_size;
uaddr += map_size;
map_iova += map_size;
}
if (ret)
vhost_vdpa_unmap(v, iova, map_iova - iova);
mmap_read_unlock(dev->mm);
return ret;
}
static int vhost_vdpa_pa_map(struct vhost_vdpa *v,
u64 iova, u64 size, u64 uaddr, u32 perm)
{
struct vhost_dev *dev = &v->vdev;
struct vhost_iotlb *iotlb = dev->iotlb;
struct page **page_list;
unsigned long list_size = PAGE_SIZE / sizeof(struct page *);
unsigned int gup_flags = FOLL_LONGTERM;
unsigned long npages, cur_base, map_pfn, last_pfn = 0;
unsigned long lock_limit, sz2pin, nchunks, i;
u64 iova = msg->iova;
u64 start = iova;
long pinned;
int ret = 0;
if (msg->iova < v->range.first || !msg->size ||
msg->iova > U64_MAX - msg->size + 1 ||
msg->iova + msg->size - 1 > v->range.last)
return -EINVAL;
if (vhost_iotlb_itree_first(iotlb, msg->iova,
msg->iova + msg->size - 1))
return -EEXIST;
/* Limit the use of memory for bookkeeping */
page_list = (struct page **) __get_free_page(GFP_KERNEL);
if (!page_list)
return -ENOMEM;
if (msg->perm & VHOST_ACCESS_WO)
if (perm & VHOST_ACCESS_WO)
gup_flags |= FOLL_WRITE;
npages = PAGE_ALIGN(msg->size + (iova & ~PAGE_MASK)) >> PAGE_SHIFT;
npages = PFN_UP(size + (iova & ~PAGE_MASK));
if (!npages) {
ret = -EINVAL;
goto free;
@ -639,13 +712,13 @@ static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v,
mmap_read_lock(dev->mm);
lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
lock_limit = PFN_DOWN(rlimit(RLIMIT_MEMLOCK));
if (npages + atomic64_read(&dev->mm->pinned_vm) > lock_limit) {
ret = -ENOMEM;
goto unlock;
}
cur_base = msg->uaddr & PAGE_MASK;
cur_base = uaddr & PAGE_MASK;
iova &= PAGE_MASK;
nchunks = 0;
@ -673,10 +746,10 @@ static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v,
if (last_pfn && (this_pfn != last_pfn + 1)) {
/* Pin a contiguous chunk of memory */
csize = (last_pfn - map_pfn + 1) << PAGE_SHIFT;
csize = PFN_PHYS(last_pfn - map_pfn + 1);
ret = vhost_vdpa_map(v, iova, csize,
map_pfn << PAGE_SHIFT,
msg->perm);
PFN_PHYS(map_pfn),
perm, NULL);
if (ret) {
/*
* Unpin the pages that are left unmapped
@ -699,13 +772,13 @@ static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v,
last_pfn = this_pfn;
}
cur_base += pinned << PAGE_SHIFT;
cur_base += PFN_PHYS(pinned);
npages -= pinned;
}
/* Pin the rest chunk */
ret = vhost_vdpa_map(v, iova, (last_pfn - map_pfn + 1) << PAGE_SHIFT,
map_pfn << PAGE_SHIFT, msg->perm);
ret = vhost_vdpa_map(v, iova, PFN_PHYS(last_pfn - map_pfn + 1),
PFN_PHYS(map_pfn), perm, NULL);
out:
if (ret) {
if (nchunks) {
@ -724,13 +797,38 @@ static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v,
for (pfn = map_pfn; pfn <= last_pfn; pfn++)
unpin_user_page(pfn_to_page(pfn));
}
vhost_vdpa_unmap(v, msg->iova, msg->size);
vhost_vdpa_unmap(v, start, size);
}
unlock:
mmap_read_unlock(dev->mm);
free:
free_page((unsigned long)page_list);
return ret;
}
static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v,
struct vhost_iotlb_msg *msg)
{
struct vhost_dev *dev = &v->vdev;
struct vdpa_device *vdpa = v->vdpa;
struct vhost_iotlb *iotlb = dev->iotlb;
if (msg->iova < v->range.first || !msg->size ||
msg->iova > U64_MAX - msg->size + 1 ||
msg->iova + msg->size - 1 > v->range.last)
return -EINVAL;
if (vhost_iotlb_itree_first(iotlb, msg->iova,
msg->iova + msg->size - 1))
return -EEXIST;
if (vdpa->use_va)
return vhost_vdpa_va_map(v, msg->iova, msg->size,
msg->uaddr, msg->perm);
return vhost_vdpa_pa_map(v, msg->iova, msg->size, msg->uaddr,
msg->perm);
}
static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev,
@ -860,7 +958,9 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep)
return -EBUSY;
nvqs = v->nvqs;
vhost_vdpa_reset(v);
r = vhost_vdpa_reset(v);
if (r)
goto err;
vqs = kmalloc_array(nvqs, sizeof(*vqs), GFP_KERNEL);
if (!vqs) {
@ -945,7 +1045,7 @@ static vm_fault_t vhost_vdpa_fault(struct vm_fault *vmf)
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
if (remap_pfn_range(vma, vmf->address & PAGE_MASK,
notify.addr >> PAGE_SHIFT, PAGE_SIZE,
PFN_DOWN(notify.addr), PAGE_SIZE,
vma->vm_page_prot))
return VM_FAULT_SIGBUS;

28
drivers/vhost/vsock.c
View File

@ -114,7 +114,7 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock,
size_t nbytes;
size_t iov_len, payload_len;
int head;
bool restore_flag = false;
u32 flags_to_restore = 0;
spin_lock_bh(&vsock->send_pkt_list_lock);
if (list_empty(&vsock->send_pkt_list)) {
@ -178,16 +178,21 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock,
* small rx buffers, headers of packets in rx queue are
* created dynamically and are initialized with header
* of current packet(except length). But in case of
* SOCK_SEQPACKET, we also must clear record delimeter
* bit(VIRTIO_VSOCK_SEQ_EOR). Otherwise, instead of one
* packet with delimeter(which marks end of record),
* there will be sequence of packets with delimeter
* bit set. After initialized header will be copied to
* rx buffer, this bit will be restored.
* SOCK_SEQPACKET, we also must clear message delimeter
* bit (VIRTIO_VSOCK_SEQ_EOM) and MSG_EOR bit
* (VIRTIO_VSOCK_SEQ_EOR) if set. Otherwise,
* there will be sequence of packets with these
* bits set. After initialized header will be copied to
* rx buffer, these required bits will be restored.
*/
if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOR) {
pkt->hdr.flags &= ~cpu_to_le32(VIRTIO_VSOCK_SEQ_EOR);
restore_flag = true;
if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOM) {
pkt->hdr.flags &= ~cpu_to_le32(VIRTIO_VSOCK_SEQ_EOM);
flags_to_restore |= VIRTIO_VSOCK_SEQ_EOM;
if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOR) {
pkt->hdr.flags &= ~cpu_to_le32(VIRTIO_VSOCK_SEQ_EOR);
flags_to_restore |= VIRTIO_VSOCK_SEQ_EOR;
}
}
}
@ -224,8 +229,7 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock,
* to send it with the next available buffer.
*/
if (pkt->off < pkt->len) {
if (restore_flag)
pkt->hdr.flags |= cpu_to_le32(VIRTIO_VSOCK_SEQ_EOR);
pkt->hdr.flags |= cpu_to_le32(flags_to_restore);
/* We are queueing the same virtio_vsock_pkt to handle
* the remaining bytes, and we want to deliver it

56
drivers/virtio/virtio.c
View File

@ -4,6 +4,7 @@
#include <linux/virtio_config.h>
#include <linux/module.h>
#include <linux/idr.h>
#include <linux/of.h>
#include <uapi/linux/virtio_ids.h>
/* Unique numbering for virtio devices. */
@ -292,6 +293,8 @@ static void virtio_dev_remove(struct device *_d)
/* Acknowledge the device's existence again. */
virtio_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE);
of_node_put(dev->dev.of_node);
}
static struct bus_type virtio_bus = {
@ -318,6 +321,43 @@ void unregister_virtio_driver(struct virtio_driver *driver)
}
EXPORT_SYMBOL_GPL(unregister_virtio_driver);
static int virtio_device_of_init(struct virtio_device *dev)
{
struct device_node *np, *pnode = dev_of_node(dev->dev.parent);
char compat[] = "virtio,deviceXXXXXXXX";
int ret, count;
if (!pnode)
return 0;
count = of_get_available_child_count(pnode);
if (!count)
return 0;
/* There can be only 1 child node */
if (WARN_ON(count > 1))
return -EINVAL;
np = of_get_next_available_child(pnode, NULL);
if (WARN_ON(!np))
return -ENODEV;
ret = snprintf(compat, sizeof(compat), "virtio,device%x", dev->id.device);
BUG_ON(ret >= sizeof(compat));
if (!of_device_is_compatible(np, compat)) {
ret = -EINVAL;
goto out;
}
dev->dev.of_node = np;
return 0;
out:
of_node_put(np);
return ret;
}
/**
* register_virtio_device - register virtio device
* @dev : virtio device to be registered
@ -342,6 +382,10 @@ int register_virtio_device(struct virtio_device *dev)
dev->index = err;
dev_set_name(&dev->dev, "virtio%u", dev->index);
err = virtio_device_of_init(dev);
if (err)
goto out_ida_remove;
spin_lock_init(&dev->config_lock);
dev->config_enabled = false;
dev->config_change_pending = false;
@ -362,10 +406,16 @@ int register_virtio_device(struct virtio_device *dev)
*/
err = device_add(&dev->dev);
if (err)
ida_simple_remove(&virtio_index_ida, dev->index);
goto out_of_node_put;
return 0;
out_of_node_put:
of_node_put(dev->dev.of_node);
out_ida_remove:
ida_simple_remove(&virtio_index_ida, dev->index);
out:
if (err)
virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED);
virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED);
return err;
}
EXPORT_SYMBOL_GPL(register_virtio_device);

4
drivers/virtio/virtio_balloon.c
View File

@ -531,8 +531,8 @@ static int init_vqs(struct virtio_balloon *vb)
callbacks[VIRTIO_BALLOON_VQ_REPORTING] = balloon_ack;
}
err = vb->vdev->config->find_vqs(vb->vdev, VIRTIO_BALLOON_VQ_MAX,
vqs, callbacks, names, NULL, NULL);
err = virtio_find_vqs(vb->vdev, VIRTIO_BALLOON_VQ_MAX, vqs,
callbacks, names, NULL);
if (err)
return err;

6
fs/file.c
View File

@ -1150,6 +1150,12 @@ int receive_fd_replace(int new_fd, struct file *file, unsigned int o_flags)
return new_fd;
}
int receive_fd(struct file *file, unsigned int o_flags)
{
return __receive_fd(file, NULL, o_flags);
}
EXPORT_SYMBOL_GPL(receive_fd);
static int ksys_dup3(unsigned int oldfd, unsigned int newfd, int flags)
{
int err = -EBADF;

7
include/linux/file.h
View File

@ -94,6 +94,9 @@ extern void fd_install(unsigned int fd, struct file *file);
extern int __receive_fd(struct file *file, int __user *ufd,
unsigned int o_flags);
extern int receive_fd(struct file *file, unsigned int o_flags);
static inline int receive_fd_user(struct file *file, int __user *ufd,
unsigned int o_flags)
{
@ -101,10 +104,6 @@ static inline int receive_fd_user(struct file *file, int __user *ufd,
return -EFAULT;
return __receive_fd(file, ufd, o_flags);
}
static inline int receive_fd(struct file *file, unsigned int o_flags)
{
return __receive_fd(file, NULL, o_flags);
}
int receive_fd_replace(int new_fd, struct file *file, unsigned int o_flags);
extern void flush_delayed_fput(void);

62
include/linux/vdpa.h
View File

@ -43,17 +43,17 @@ struct vdpa_vq_state_split {
* @last_used_idx: used index
*/
struct vdpa_vq_state_packed {
u16 last_avail_counter:1;
u16 last_avail_idx:15;
u16 last_used_counter:1;
u16 last_used_idx:15;
u16 last_avail_counter:1;
u16 last_avail_idx:15;
u16 last_used_counter:1;
u16 last_used_idx:15;
};
struct vdpa_vq_state {
union {
struct vdpa_vq_state_split split;
struct vdpa_vq_state_packed packed;
};
union {
struct vdpa_vq_state_split split;
struct vdpa_vq_state_packed packed;
};
};
struct vdpa_mgmt_dev;
@ -65,6 +65,7 @@ struct vdpa_mgmt_dev;
* @config: the configuration ops for this device.
* @index: device index
* @features_valid: were features initialized? for legacy guests
* @use_va: indicate whether virtual address must be used by this device
* @nvqs: maximum number of supported virtqueues
* @mdev: management device pointer; caller must setup when registering device as part
* of dev_add() mgmtdev ops callback before invoking _vdpa_register_device().
@ -75,6 +76,7 @@ struct vdpa_device {
const struct vdpa_config_ops *config;
unsigned int index;
bool features_valid;
bool use_va;
int nvqs;
struct vdpa_mgmt_dev *mdev;
};
@ -89,6 +91,16 @@ struct vdpa_iova_range {
u64 last;
};
/**
* Corresponding file area for device memory mapping
* @file: vma->vm_file for the mapping
* @offset: mapping offset in the vm_file
*/
struct vdpa_map_file {
struct file *file;
u64 offset;
};
/**
* struct vdpa_config_ops - operations for configuring a vDPA device.
* Note: vDPA device drivers are required to implement all of the
@ -131,7 +143,7 @@ struct vdpa_iova_range {
* @vdev: vdpa device
* @idx: virtqueue index
* @state: pointer to returned state (last_avail_idx)
* @get_vq_notification: Get the notification area for a virtqueue
* @get_vq_notification: Get the notification area for a virtqueue
* @vdev: vdpa device
* @idx: virtqueue index
* Returns the notifcation area
@ -171,6 +183,9 @@ struct vdpa_iova_range {
* @set_status: Set the device status
* @vdev: vdpa device
* @status: virtio device status
* @reset: Reset device
* @vdev: vdpa device
* Returns integer: success (0) or error (< 0)
* @get_config_size: Get the size of the configuration space
* @vdev: vdpa device
* Returns size_t: configuration size
@ -255,6 +270,7 @@ struct vdpa_config_ops {
u32 (*get_vendor_id)(struct vdpa_device *vdev);
u8 (*get_status)(struct vdpa_device *vdev);
void (*set_status)(struct vdpa_device *vdev, u8 status);
int (*reset)(struct vdpa_device *vdev);
size_t (*get_config_size)(struct vdpa_device *vdev);
void (*get_config)(struct vdpa_device *vdev, unsigned int offset,
void *buf, unsigned int len);
@ -266,7 +282,7 @@ struct vdpa_config_ops {
/* DMA ops */
int (*set_map)(struct vdpa_device *vdev, struct vhost_iotlb *iotlb);
int (*dma_map)(struct vdpa_device *vdev, u64 iova, u64 size,
u64 pa, u32 perm);
u64 pa, u32 perm, void *opaque);
int (*dma_unmap)(struct vdpa_device *vdev, u64 iova, u64 size);
/* Free device resources */
@ -275,7 +291,8 @@ struct vdpa_config_ops {
struct vdpa_device *__vdpa_alloc_device(struct device *parent,
const struct vdpa_config_ops *config,
size_t size, const char *name);
size_t size, const char *name,
bool use_va);
/**
* vdpa_alloc_device - allocate and initilaize a vDPA device
@ -285,15 +302,16 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent,
* @parent: the parent device
* @config: the bus operations that is supported by this device
* @name: name of the vdpa device
* @use_va: indicate whether virtual address must be used by this device
*
* Return allocated data structure or ERR_PTR upon error
*/
#define vdpa_alloc_device(dev_struct, member, parent, config, name) \
#define vdpa_alloc_device(dev_struct, member, parent, config, name, use_va) \
container_of(__vdpa_alloc_device( \
parent, config, \
sizeof(dev_struct) + \
BUILD_BUG_ON_ZERO(offsetof( \
dev_struct, member)), name), \
dev_struct, member)), name, use_va), \
dev_struct, member)
int vdpa_register_device(struct vdpa_device *vdev, int nvqs);
@ -348,27 +366,27 @@ static inline struct device *vdpa_get_dma_dev(struct vdpa_device *vdev)
return vdev->dma_dev;
}
static inline void vdpa_reset(struct vdpa_device *vdev)
static inline int vdpa_reset(struct vdpa_device *vdev)
{
const struct vdpa_config_ops *ops = vdev->config;
const struct vdpa_config_ops *ops = vdev->config;
vdev->features_valid = false;
ops->set_status(vdev, 0);
return ops->reset(vdev);
}
static inline int vdpa_set_features(struct vdpa_device *vdev, u64 features)
{
const struct vdpa_config_ops *ops = vdev->config;
const struct vdpa_config_ops *ops = vdev->config;
vdev->features_valid = true;
return ops->set_features(vdev, features);
return ops->set_features(vdev, features);
}
static inline void vdpa_get_config(struct vdpa_device *vdev, unsigned offset,
void *buf, unsigned int len)
static inline void vdpa_get_config(struct vdpa_device *vdev,
unsigned int offset, void *buf,
unsigned int len)
{
const struct vdpa_config_ops *ops = vdev->config;
const struct vdpa_config_ops *ops = vdev->config;
/*
* Config accesses aren't supposed to trigger before features are set.

3
include/linux/vhost_iotlb.h
View File

@ -17,6 +17,7 @@ struct vhost_iotlb_map {
u32 perm;
u32 flags_padding;
u64 __subtree_last;
void *opaque;
};
#define VHOST_IOTLB_FLAG_RETIRE 0x1
@ -29,6 +30,8 @@ struct vhost_iotlb {
unsigned int flags;
};
int vhost_iotlb_add_range_ctx(struct vhost_iotlb *iotlb, u64 start, u64 last,
u64 addr, unsigned int perm, void *opaque);
int vhost_iotlb_add_range(struct vhost_iotlb *iotlb, u64 start, u64 last,
u64 addr, unsigned int perm);
void vhost_iotlb_del_range(struct vhost_iotlb *iotlb, u64 start, u64 last);

306
include/uapi/linux/vduse.h Normal file
View File

@ -0,0 +1,306 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_VDUSE_H_
#define _UAPI_VDUSE_H_
#include <linux/types.h>
#define VDUSE_BASE 0x81
/* The ioctls for control device (/dev/vduse/control) */
#define VDUSE_API_VERSION 0
/*
* Get the version of VDUSE API that kernel supported (VDUSE_API_VERSION).
* This is used for future extension.
*/
#define VDUSE_GET_API_VERSION _IOR(VDUSE_BASE, 0x00, __u64)
/* Set the version of VDUSE API that userspace supported. */
#define VDUSE_SET_API_VERSION _IOW(VDUSE_BASE, 0x01, __u64)
/**
* struct vduse_dev_config - basic configuration of a VDUSE device
* @name: VDUSE device name, needs to be NUL terminated
* @vendor_id: virtio vendor id
* @device_id: virtio device id
* @features: virtio features
* @vq_num: the number of virtqueues
* @vq_align: the allocation alignment of virtqueue's metadata
* @reserved: for future use, needs to be initialized to zero
* @config_size: the size of the configuration space
* @config: the buffer of the configuration space
*
* Structure used by VDUSE_CREATE_DEV ioctl to create VDUSE device.
*/
struct vduse_dev_config {
#define VDUSE_NAME_MAX 256
char name[VDUSE_NAME_MAX];
__u32 vendor_id;
__u32 device_id;
__u64 features;
__u32 vq_num;
__u32 vq_align;
__u32 reserved[13];
__u32 config_size;
__u8 config[];
};
/* Create a VDUSE device which is represented by a char device (/dev/vduse/$NAME) */
#define VDUSE_CREATE_DEV _IOW(VDUSE_BASE, 0x02, struct vduse_dev_config)
/*
* Destroy a VDUSE device. Make sure there are no more references
* to the char device (/dev/vduse/$NAME).
*/
#define VDUSE_DESTROY_DEV _IOW(VDUSE_BASE, 0x03, char[VDUSE_NAME_MAX])
/* The ioctls for VDUSE device (/dev/vduse/$NAME) */
/**
* struct vduse_iotlb_entry - entry of IOTLB to describe one IOVA region [start, last]
* @offset: the mmap offset on returned file descriptor
* @start: start of the IOVA region
* @last: last of the IOVA region
* @perm: access permission of the IOVA region
*
* Structure used by VDUSE_IOTLB_GET_FD ioctl to find an overlapped IOVA region.
*/
struct vduse_iotlb_entry {
__u64 offset;
__u64 start;
__u64 last;
#define VDUSE_ACCESS_RO 0x1
#define VDUSE_ACCESS_WO 0x2
#define VDUSE_ACCESS_RW 0x3
__u8 perm;
};
/*
* Find the first IOVA region that overlaps with the range [start, last]
* and return the corresponding file descriptor. Return -EINVAL means the
* IOVA region doesn't exist. Caller should set start and last fields.
*/
#define VDUSE_IOTLB_GET_FD _IOWR(VDUSE_BASE, 0x10, struct vduse_iotlb_entry)
/*
* Get the negotiated virtio features. It's a subset of the features in
* struct vduse_dev_config which can be accepted by virtio driver. It's
* only valid after FEATURES_OK status bit is set.
*/
#define VDUSE_DEV_GET_FEATURES _IOR(VDUSE_BASE, 0x11, __u64)
/**
* struct vduse_config_data - data used to update configuration space
* @offset: the offset from the beginning of configuration space
* @length: the length to write to configuration space
* @buffer: the buffer used to write from
*
* Structure used by VDUSE_DEV_SET_CONFIG ioctl to update device
* configuration space.
*/
struct vduse_config_data {
__u32 offset;
__u32 length;
__u8 buffer[];
};
/* Set device configuration space */
#define VDUSE_DEV_SET_CONFIG _IOW(VDUSE_BASE, 0x12, struct vduse_config_data)
/*
* Inject a config interrupt. It's usually used to notify virtio driver
* that device configuration space has changed.
*/
#define VDUSE_DEV_INJECT_CONFIG_IRQ _IO(VDUSE_BASE, 0x13)
/**
* struct vduse_vq_config - basic configuration of a virtqueue
* @index: virtqueue index
* @max_size: the max size of virtqueue
* @reserved: for future use, needs to be initialized to zero
*
* Structure used by VDUSE_VQ_SETUP ioctl to setup a virtqueue.
*/
struct vduse_vq_config {
__u32 index;
__u16 max_size;
__u16 reserved[13];
};
/*
* Setup the specified virtqueue. Make sure all virtqueues have been
* configured before the device is attached to vDPA bus.
*/
#define VDUSE_VQ_SETUP _IOW(VDUSE_BASE, 0x14, struct vduse_vq_config)
/**
* struct vduse_vq_state_split - split virtqueue state
* @avail_index: available index
*/
struct vduse_vq_state_split {
__u16 avail_index;
};
/**
* struct vduse_vq_state_packed - packed virtqueue state
* @last_avail_counter: last driver ring wrap counter observed by device
* @last_avail_idx: device available index
* @last_used_counter: device ring wrap counter
* @last_used_idx: used index
*/
struct vduse_vq_state_packed {
__u16 last_avail_counter;
__u16 last_avail_idx;
__u16 last_used_counter;
__u16 last_used_idx;
};
/**
* struct vduse_vq_info - information of a virtqueue
* @index: virtqueue index
* @num: the size of virtqueue
* @desc_addr: address of desc area
* @driver_addr: address of driver area
* @device_addr: address of device area
* @split: split virtqueue state
* @packed: packed virtqueue state
* @ready: ready status of virtqueue
*
* Structure used by VDUSE_VQ_GET_INFO ioctl to get virtqueue's information.
*/
struct vduse_vq_info {
__u32 index;
__u32 num;
__u64 desc_addr;
__u64 driver_addr;
__u64 device_addr;
union {
struct vduse_vq_state_split split;
struct vduse_vq_state_packed packed;
};
__u8 ready;
};
/* Get the specified virtqueue's information. Caller should set index field. */
#define VDUSE_VQ_GET_INFO _IOWR(VDUSE_BASE, 0x15, struct vduse_vq_info)
/**
* struct vduse_vq_eventfd - eventfd configuration for a virtqueue
* @index: virtqueue index
* @fd: eventfd, -1 means de-assigning the eventfd
*
* Structure used by VDUSE_VQ_SETUP_KICKFD ioctl to setup kick eventfd.
*/
struct vduse_vq_eventfd {
__u32 index;
#define VDUSE_EVENTFD_DEASSIGN -1
int fd;
};
/*
* Setup kick eventfd for specified virtqueue. The kick eventfd is used
* by VDUSE kernel module to notify userspace to consume the avail vring.
*/
#define VDUSE_VQ_SETUP_KICKFD _IOW(VDUSE_BASE, 0x16, struct vduse_vq_eventfd)
/*
* Inject an interrupt for specific virtqueue. It's used to notify virtio driver
* to consume the used vring.
*/
#define VDUSE_VQ_INJECT_IRQ _IOW(VDUSE_BASE, 0x17, __u32)
/* The control messages definition for read(2)/write(2) on /dev/vduse/$NAME */
/**
* enum vduse_req_type - request type
* @VDUSE_GET_VQ_STATE: get the state for specified virtqueue from userspace
* @VDUSE_SET_STATUS: set the device status
* @VDUSE_UPDATE_IOTLB: Notify userspace to update the memory mapping for
* specified IOVA range via VDUSE_IOTLB_GET_FD ioctl
*/
enum vduse_req_type {
VDUSE_GET_VQ_STATE,
VDUSE_SET_STATUS,
VDUSE_UPDATE_IOTLB,
};
/**
* struct vduse_vq_state - virtqueue state
* @index: virtqueue index
* @split: split virtqueue state
* @packed: packed virtqueue state
*/
struct vduse_vq_state {
__u32 index;
union {
struct vduse_vq_state_split split;
struct vduse_vq_state_packed packed;
};
};
/**
* struct vduse_dev_status - device status
* @status: device status
*/
struct vduse_dev_status {
__u8 status;
};
/**
* struct vduse_iova_range - IOVA range [start, last]
* @start: start of the IOVA range
* @last: last of the IOVA range
*/
struct vduse_iova_range {
__u64 start;
__u64 last;
};
/**
* struct vduse_dev_request - control request
* @type: request type
* @request_id: request id
* @reserved: for future use
* @vq_state: virtqueue state, only index field is available
* @s: device status
* @iova: IOVA range for updating
* @padding: padding
*
* Structure used by read(2) on /dev/vduse/$NAME.
*/
struct vduse_dev_request {
__u32 type;
__u32 request_id;
__u32 reserved[4];
union {
struct vduse_vq_state vq_state;
struct vduse_dev_status s;
struct vduse_iova_range iova;
__u32 padding[32];
};
};
/**
* struct vduse_dev_response - response to control request
* @request_id: corresponding request id
* @result: the result of request
* @reserved: for future use, needs to be initialized to zero
* @vq_state: virtqueue state
* @padding: padding
*
* Structure used by write(2) on /dev/vduse/$NAME.
*/
struct vduse_dev_response {
__u32 request_id;
#define VDUSE_REQ_RESULT_OK 0x00
#define VDUSE_REQ_RESULT_FAILED 0x01
__u32 result;
__u32 reserved[4];
union {
struct vduse_vq_state vq_state;
__u32 padding[32];
};
};
#endif /* _UAPI_VDUSE_H_ */

9
include/uapi/linux/virtio_ids.h
View File

@ -54,9 +54,18 @@
#define VIRTIO_ID_SOUND 25 /* virtio sound */
#define VIRTIO_ID_FS 26 /* virtio filesystem */
#define VIRTIO_ID_PMEM 27 /* virtio pmem */
#define VIRTIO_ID_RPMB 28 /* virtio rpmb */
#define VIRTIO_ID_MAC80211_HWSIM 29 /* virtio mac80211-hwsim */
#define VIRTIO_ID_VIDEO_ENCODER 30 /* virtio video encoder */
#define VIRTIO_ID_VIDEO_DECODER 31 /* virtio video decoder */
#define VIRTIO_ID_SCMI 32 /* virtio SCMI */
#define VIRTIO_ID_NITRO_SEC_MOD 33 /* virtio nitro secure module*/
#define VIRTIO_ID_I2C_ADAPTER 34 /* virtio i2c adapter */
#define VIRTIO_ID_WATCHDOG 35 /* virtio watchdog */
#define VIRTIO_ID_CAN 36 /* virtio can */
#define VIRTIO_ID_DMABUF 37 /* virtio dmabuf */
#define VIRTIO_ID_PARAM_SERV 38 /* virtio parameter server */
#define VIRTIO_ID_AUDIO_POLICY 39 /* virtio audio policy */
#define VIRTIO_ID_BT 40 /* virtio bluetooth */
#define VIRTIO_ID_GPIO 41 /* virtio gpio */

3
include/uapi/linux/virtio_vsock.h
View File

@ -97,7 +97,8 @@ enum virtio_vsock_shutdown {
/* VIRTIO_VSOCK_OP_RW flags values */
enum virtio_vsock_rw {
VIRTIO_VSOCK_SEQ_EOR = 1,
VIRTIO_VSOCK_SEQ_EOM = 1,
VIRTIO_VSOCK_SEQ_EOR = 2,
};
#endif /* _UAPI_LINUX_VIRTIO_VSOCK_H */

10
net/vmw_vsock/af_vsock.c
View File

@ -2014,7 +2014,7 @@ static int __vsock_seqpacket_recvmsg(struct sock *sk, struct msghdr *msg,
{
const struct vsock_transport *transport;
struct vsock_sock *vsk;
ssize_t record_len;
ssize_t msg_len;
long timeout;
int err = 0;
DEFINE_WAIT(wait);
@ -2028,9 +2028,9 @@ static int __vsock_seqpacket_recvmsg(struct sock *sk, struct msghdr *msg,
if (err <= 0)
goto out;
record_len = transport->seqpacket_dequeue(vsk, msg, flags);
msg_len = transport->seqpacket_dequeue(vsk, msg, flags);
if (record_len < 0) {
if (msg_len < 0) {
err = -ENOMEM;
goto out;
}
@ -2044,14 +2044,14 @@ static int __vsock_seqpacket_recvmsg(struct sock *sk, struct msghdr *msg,
* packet.
*/
if (flags & MSG_TRUNC)
err = record_len;
err = msg_len;
else
err = len - msg_data_left(msg);
/* Always set MSG_TRUNC if real length of packet is
* bigger than user's buffer.
*/
if (record_len > len)
if (msg_len > len)
msg->msg_flags |= MSG_TRUNC;
}

23
net/vmw_vsock/virtio_transport_common.c
View File

@ -76,8 +76,12 @@ virtio_transport_alloc_pkt(struct virtio_vsock_pkt_info *info,
goto out;
if (msg_data_left(info->msg) == 0 &&
info->type == VIRTIO_VSOCK_TYPE_SEQPACKET)
pkt->hdr.flags |= cpu_to_le32(VIRTIO_VSOCK_SEQ_EOR);
info->type == VIRTIO_VSOCK_TYPE_SEQPACKET) {
pkt->hdr.flags |= cpu_to_le32(VIRTIO_VSOCK_SEQ_EOM);
if (info->msg->msg_flags & MSG_EOR)
pkt->hdr.flags |= cpu_to_le32(VIRTIO_VSOCK_SEQ_EOR);
}
}
trace_virtio_transport_alloc_pkt(src_cid, src_port,
@ -457,9 +461,12 @@ static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk,
dequeued_len += pkt_len;
}
if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOR) {
if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOM) {
msg_ready = true;
vvs->msg_count--;
if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOR)
msg->msg_flags |= MSG_EOR;
}
virtio_transport_dec_rx_pkt(vvs, pkt);
@ -1029,7 +1036,7 @@ virtio_transport_recv_enqueue(struct vsock_sock *vsk,
goto out;
}
if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOR)
if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOM)
vvs->msg_count++;
/* Try to copy small packets into the buffer of last packet queued,
@ -1044,12 +1051,12 @@ virtio_transport_recv_enqueue(struct vsock_sock *vsk,
/* If there is space in the last packet queued, we copy the
* new packet in its buffer. We avoid this if the last packet
* queued has VIRTIO_VSOCK_SEQ_EOR set, because this is
* delimiter of SEQPACKET record, so 'pkt' is the first packet
* of a new record.
* queued has VIRTIO_VSOCK_SEQ_EOM set, because this is
* delimiter of SEQPACKET message, so 'pkt' is the first packet
* of a new message.
*/
if ((pkt->len <= last_pkt->buf_len - last_pkt->len) &&
!(le32_to_cpu(last_pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOR)) {
!(le32_to_cpu(last_pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOM)) {
memcpy(last_pkt->buf + last_pkt->len, pkt->buf,
pkt->len);
last_pkt->len += pkt->len;

8
tools/testing/vsock/vsock_test.c
View File

@ -282,6 +282,7 @@ static void test_stream_msg_peek_server(const struct test_opts *opts)
}
#define MESSAGES_CNT 7
#define MSG_EOR_IDX (MESSAGES_CNT / 2)
static void test_seqpacket_msg_bounds_client(const struct test_opts *opts)
{
int fd;
@ -294,7 +295,7 @@ static void test_seqpacket_msg_bounds_client(const struct test_opts *opts)
/* Send several messages, one with MSG_EOR flag */
for (int i = 0; i < MESSAGES_CNT; i++)
send_byte(fd, 1, 0);
send_byte(fd, 1, (i == MSG_EOR_IDX) ? MSG_EOR : 0);
control_writeln("SENDDONE");
close(fd);
@ -324,6 +325,11 @@ static void test_seqpacket_msg_bounds_server(const struct test_opts *opts)
perror("message bound violated");
exit(EXIT_FAILURE);
}
if ((i == MSG_EOR_IDX) ^ !!(msg.msg_flags & MSG_EOR)) {
perror("MSG_EOR");
exit(EXIT_FAILURE);
}
}
close(fd);