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VFIO updates for v5.18-rc1

Browse Source 
- Introduce new device migration uAPI and implement device specific
    mlx5 vfio-pci variant driver supporting new protocol (Jason Gunthorpe,
    Yishai Hadas, Leon Romanovsky)
 
  - New HiSilicon acc vfio-pci variant driver, also supporting migration
    interface (Shameer Kolothum, Longfang Liu)
 
  - D3hot fixes for vfio-pci-core (Abhishek Sahu)
 
  - Document new vfio-pci variant driver acceptance criteria
    (Alex Williamson)
 
  - Fix UML build unresolved ioport_{un}map() functions
    (Alex Williamson)
 
  - Fix MAINTAINERS due to header movement (Lukas Bulwahn)
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Merge tag 'vfio-v5.18-rc1' of https://github.com/awilliam/linux-vfio

Pull VFIO updates from Alex Williamson:

 - Introduce new device migration uAPI and implement device specific
   mlx5 vfio-pci variant driver supporting new protocol (Jason
   Gunthorpe, Yishai Hadas, Leon Romanovsky)

 - New HiSilicon acc vfio-pci variant driver, also supporting migration
   interface (Shameer Kolothum, Longfang Liu)

 - D3hot fixes for vfio-pci-core (Abhishek Sahu)

 - Document new vfio-pci variant driver acceptance criteria
   (Alex Williamson)

 - Fix UML build unresolved ioport_{un}map() functions
   (Alex Williamson)

 - Fix MAINTAINERS due to header movement (Lukas Bulwahn)

* tag 'vfio-v5.18-rc1' of https://github.com/awilliam/linux-vfio: (31 commits)
  vfio-pci: Provide reviewers and acceptance criteria for variant drivers
  MAINTAINERS: adjust entry for header movement in hisilicon qm driver
  hisi_acc_vfio_pci: Use its own PCI reset_done error handler
  hisi_acc_vfio_pci: Add support for VFIO live migration
  crypto: hisilicon/qm: Set the VF QM state register
  hisi_acc_vfio_pci: Add helper to retrieve the struct pci_driver
  hisi_acc_vfio_pci: Restrict access to VF dev BAR2 migration region
  hisi_acc_vfio_pci: add new vfio_pci driver for HiSilicon ACC devices
  hisi_acc_qm: Move VF PCI device IDs to common header
  crypto: hisilicon/qm: Move few definitions to common header
  crypto: hisilicon/qm: Move the QM header to include/linux
  vfio/mlx5: Fix to not use 0 as NULL pointer
  PCI/IOV: Fix wrong kernel-doc identifier
  vfio/mlx5: Use its own PCI reset_done error handler
  vfio/pci: Expose vfio_pci_core_aer_err_detected()
  vfio/mlx5: Implement vfio_pci driver for mlx5 devices
  vfio/mlx5: Expose migration commands over mlx5 device
  vfio: Remove migration protocol v1 documentation
  vfio: Extend the device migration protocol with RUNNING_P2P
  vfio: Define device migration protocol v2
  ...
This commit is contained in:
Linus Torvalds 2022-03-24 12:35:59 -07:00
commit 7403e6d826
40 changed files with 3561 additions and 361 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -103,6 +103,7 @@ available subsections can be seen below.
sync_file
vfio-mediated-device
vfio
vfio-pci-device-specific-driver-acceptance
xilinx/index
xillybus
zorro

35
Documentation/driver-api/vfio-pci-device-specific-driver-acceptance.rst Normal file
View File

@ -0,0 +1,35 @@
.. SPDX-License-Identifier: GPL-2.0
Acceptance criteria for vfio-pci device specific driver variants
================================================================
Overview
--------
The vfio-pci driver exists as a device agnostic driver using the
system IOMMU and relying on the robustness of platform fault
handling to provide isolated device access to userspace. While the
vfio-pci driver does include some device specific support, further
extensions for yet more advanced device specific features are not
sustainable. The vfio-pci driver has therefore split out
vfio-pci-core as a library that may be reused to implement features
requiring device specific knowledge, ex. saving and loading device
state for the purposes of supporting migration.
In support of such features, it's expected that some device specific
variants may interact with parent devices (ex. SR-IOV PF in support of
a user assigned VF) or other extensions that may not be otherwise
accessible via the vfio-pci base driver. Authors of such drivers
should be diligent not to create exploitable interfaces via these
interactions or allow unchecked userspace data to have an effect
beyond the scope of the assigned device.
New driver submissions are therefore requested to have approval via
sign-off/ack/review/etc for any interactions with parent drivers.
Additionally, drivers should make an attempt to provide sufficient
documentation for reviewers to understand the device specific
extensions, for example in the case of migration data, how is the
device state composed and consumed, which portions are not otherwise
available to the user via vfio-pci, what safeguards exist to validate
the data, etc. To that extent, authors should additionally expect to
require reviews from at least one of the listed reviewers, in addition
to the overall vfio maintainer.

1
Documentation/maintainer/maintainer-entry-profile.rst
View File

@ -103,3 +103,4 @@ to do something different in the near future.
../nvdimm/maintainer-entry-profile
../riscv/patch-acceptance
../driver-api/media/maintainer-entry-profile
../driver-api/vfio-pci-device-specific-driver-acceptance

25
MAINTAINERS
View File

@ -8722,9 +8722,9 @@ L: linux-crypto@vger.kernel.org
S: Maintained
F: Documentation/ABI/testing/debugfs-hisi-zip
F: drivers/crypto/hisilicon/qm.c
F: drivers/crypto/hisilicon/qm.h
F: drivers/crypto/hisilicon/sgl.c
F: drivers/crypto/hisilicon/zip/
F: include/linux/hisi_acc_qm.h
HISILICON ROCE DRIVER
M: Wenpeng Liang <liangwenpeng@huawei.com>
@ -20399,6 +20399,13 @@ L: kvm@vger.kernel.org
S: Maintained
F: drivers/vfio/fsl-mc/
VFIO HISILICON PCI DRIVER
M: Longfang Liu <liulongfang@huawei.com>
M: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
L: kvm@vger.kernel.org
S: Maintained
F: drivers/vfio/pci/hisilicon/
VFIO MEDIATED DEVICE DRIVERS
M: Kirti Wankhede <kwankhede@nvidia.com>
L: kvm@vger.kernel.org
@ -20408,12 +20415,28 @@ F: drivers/vfio/mdev/
F: include/linux/mdev.h
F: samples/vfio-mdev/
VFIO PCI DEVICE SPECIFIC DRIVERS
R: Jason Gunthorpe <jgg@nvidia.com>
R: Yishai Hadas <yishaih@nvidia.com>
R: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
R: Kevin Tian <kevin.tian@intel.com>
L: kvm@vger.kernel.org
S: Maintained
P: Documentation/driver-api/vfio-pci-device-specific-driver-acceptance.rst
F: drivers/vfio/pci/*/
VFIO PLATFORM DRIVER
M: Eric Auger <eric.auger@redhat.com>
L: kvm@vger.kernel.org
S: Maintained
F: drivers/vfio/platform/
VFIO MLX5 PCI DRIVER
M: Yishai Hadas <yishaih@nvidia.com>
L: kvm@vger.kernel.org
S: Maintained
F: drivers/vfio/pci/mlx5/
VGA_SWITCHEROO
R: Lukas Wunner <lukas@wunner.de>
S: Maintained

2
drivers/crypto/hisilicon/hpre/hpre.h
View File

@ -4,7 +4,7 @@
#define __HISI_HPRE_H
#include <linux/list.h>
#include "../qm.h"
#include <linux/hisi_acc_qm.h>
#define HPRE_SQE_SIZE sizeof(struct hpre_sqe)
#define HPRE_PF_DEF_Q_NUM 64

19
drivers/crypto/hisilicon/hpre/hpre_main.c
View File

@ -68,8 +68,7 @@
#define HPRE_REG_RD_INTVRL_US 10
#define HPRE_REG_RD_TMOUT_US 1000
#define HPRE_DBGFS_VAL_MAX_LEN 20
#define HPRE_PCI_DEVICE_ID 0xa258
#define HPRE_PCI_VF_DEVICE_ID 0xa259
#define PCI_DEVICE_ID_HUAWEI_HPRE_PF 0xa258
#define HPRE_QM_USR_CFG_MASK GENMASK(31, 1)
#define HPRE_QM_AXI_CFG_MASK GENMASK(15, 0)
#define HPRE_QM_VFG_AX_MASK GENMASK(7, 0)
@ -111,8 +110,8 @@
static const char hpre_name[] = "hisi_hpre";
static struct dentry *hpre_debugfs_root;
static const struct pci_device_id hpre_dev_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, HPRE_PCI_DEVICE_ID) },
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, HPRE_PCI_VF_DEVICE_ID) },
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_HPRE_PF) },
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_HPRE_VF) },
{ 0, }
};
@ -242,7 +241,7 @@ MODULE_PARM_DESC(uacce_mode, UACCE_MODE_DESC);
static int pf_q_num_set(const char *val, const struct kernel_param *kp)
{
return q_num_set(val, kp, HPRE_PCI_DEVICE_ID);
return q_num_set(val, kp, PCI_DEVICE_ID_HUAWEI_HPRE_PF);
}
static const struct kernel_param_ops hpre_pf_q_num_ops = {
@ -921,7 +920,7 @@ static int hpre_debugfs_init(struct hisi_qm *qm)
qm->debug.sqe_mask_len = HPRE_SQE_MASK_LEN;
hisi_qm_debug_init(qm);
if (qm->pdev->device == HPRE_PCI_DEVICE_ID) {
if (qm->pdev->device == PCI_DEVICE_ID_HUAWEI_HPRE_PF) {
ret = hpre_ctrl_debug_init(qm);
if (ret)
goto failed_to_create;
@ -958,7 +957,7 @@ static int hpre_qm_init(struct hisi_qm *qm, struct pci_dev *pdev)
qm->sqe_size = HPRE_SQE_SIZE;
qm->dev_name = hpre_name;
qm->fun_type = (pdev->device == HPRE_PCI_DEVICE_ID) ?
qm->fun_type = (pdev->device == PCI_DEVICE_ID_HUAWEI_HPRE_PF) ?
QM_HW_PF : QM_HW_VF;
if (qm->fun_type == QM_HW_PF) {
qm->qp_base = HPRE_PF_DEF_Q_BASE;
@ -1191,6 +1190,12 @@ static struct pci_driver hpre_pci_driver = {
.driver.pm = &hpre_pm_ops,
};
struct pci_driver *hisi_hpre_get_pf_driver(void)
{
return &hpre_pci_driver;
}
EXPORT_SYMBOL_GPL(hisi_hpre_get_pf_driver);
static void hpre_register_debugfs(void)
{
if (!debugfs_initialized())

68
drivers/crypto/hisilicon/qm.c
View File

@ -15,7 +15,7 @@
#include <linux/uacce.h>
#include <linux/uaccess.h>
#include <uapi/misc/uacce/hisi_qm.h>
#include "qm.h"
#include <linux/hisi_acc_qm.h>
/* eq/aeq irq enable */
#define QM_VF_AEQ_INT_SOURCE 0x0
@ -33,23 +33,6 @@
#define QM_ABNORMAL_EVENT_IRQ_VECTOR 3
/* mailbox */
#define QM_MB_CMD_SQC 0x0
#define QM_MB_CMD_CQC 0x1
#define QM_MB_CMD_EQC 0x2
#define QM_MB_CMD_AEQC 0x3
#define QM_MB_CMD_SQC_BT 0x4
#define QM_MB_CMD_CQC_BT 0x5
#define QM_MB_CMD_SQC_VFT_V2 0x6
#define QM_MB_CMD_STOP_QP 0x8
#define QM_MB_CMD_SRC 0xc
#define QM_MB_CMD_DST 0xd
#define QM_MB_CMD_SEND_BASE 0x300
#define QM_MB_EVENT_SHIFT 8
#define QM_MB_BUSY_SHIFT 13
#define QM_MB_OP_SHIFT 14
#define QM_MB_CMD_DATA_ADDR_L 0x304
#define QM_MB_CMD_DATA_ADDR_H 0x308
#define QM_MB_PING_ALL_VFS 0xffff
#define QM_MB_CMD_DATA_SHIFT 32
#define QM_MB_CMD_DATA_MASK GENMASK(31, 0)
@ -103,19 +86,12 @@
#define QM_DB_CMD_SHIFT_V1 16
#define QM_DB_INDEX_SHIFT_V1 32
#define QM_DB_PRIORITY_SHIFT_V1 48
#define QM_DOORBELL_SQ_CQ_BASE_V2 0x1000
#define QM_DOORBELL_EQ_AEQ_BASE_V2 0x2000
#define QM_QUE_ISO_CFG_V 0x0030
#define QM_PAGE_SIZE 0x0034
#define QM_QUE_ISO_EN 0x100154
#define QM_CAPBILITY 0x100158
#define QM_QP_NUN_MASK GENMASK(10, 0)
#define QM_QP_DB_INTERVAL 0x10000
#define QM_QP_MAX_NUM_SHIFT 11
#define QM_DB_CMD_SHIFT_V2 12
#define QM_DB_RAND_SHIFT_V2 16
#define QM_DB_INDEX_SHIFT_V2 32
#define QM_DB_PRIORITY_SHIFT_V2 48
#define QM_MEM_START_INIT 0x100040
#define QM_MEM_INIT_DONE 0x100044
@ -693,7 +669,7 @@ static void qm_mb_pre_init(struct qm_mailbox *mailbox, u8 cmd,
}
/* return 0 mailbox ready, -ETIMEDOUT hardware timeout */
static int qm_wait_mb_ready(struct hisi_qm *qm)
int hisi_qm_wait_mb_ready(struct hisi_qm *qm)
{
u32 val;
@ -701,6 +677,7 @@ static int qm_wait_mb_ready(struct hisi_qm *qm)
val, !((val >> QM_MB_BUSY_SHIFT) &
0x1), POLL_PERIOD, POLL_TIMEOUT);
}
EXPORT_SYMBOL_GPL(hisi_qm_wait_mb_ready);
/* 128 bit should be written to hardware at one time to trigger a mailbox */
static void qm_mb_write(struct hisi_qm *qm, const void *src)
@ -726,14 +703,14 @@ static void qm_mb_write(struct hisi_qm *qm, const void *src)
static int qm_mb_nolock(struct hisi_qm *qm, struct qm_mailbox *mailbox)
{
if (unlikely(qm_wait_mb_ready(qm))) {
if (unlikely(hisi_qm_wait_mb_ready(qm))) {
dev_err(&qm->pdev->dev, "QM mailbox is busy to start!\n");
goto mb_busy;
}
qm_mb_write(qm, mailbox);
if (unlikely(qm_wait_mb_ready(qm))) {
if (unlikely(hisi_qm_wait_mb_ready(qm))) {
dev_err(&qm->pdev->dev, "QM mailbox operation timeout!\n");
goto mb_busy;
}
@ -745,8 +722,8 @@ mb_busy:
return -EBUSY;
}
static int qm_mb(struct hisi_qm *qm, u8 cmd, dma_addr_t dma_addr, u16 queue,
bool op)
int hisi_qm_mb(struct hisi_qm *qm, u8 cmd, dma_addr_t dma_addr, u16 queue,
bool op)
{
struct qm_mailbox mailbox;
int ret;
@ -762,6 +739,7 @@ static int qm_mb(struct hisi_qm *qm, u8 cmd, dma_addr_t dma_addr, u16 queue,
return ret;
}
EXPORT_SYMBOL_GPL(hisi_qm_mb);
static void qm_db_v1(struct hisi_qm *qm, u16 qn, u8 cmd, u16 index, u8 priority)
{
@ -1351,7 +1329,7 @@ static int qm_get_vft_v2(struct hisi_qm *qm, u32 *base, u32 *number)
u64 sqc_vft;
int ret;
ret = qm_mb(qm, QM_MB_CMD_SQC_VFT_V2, 0, 0, 1);
ret = hisi_qm_mb(qm, QM_MB_CMD_SQC_VFT_V2, 0, 0, 1);
if (ret)
return ret;
@ -1725,12 +1703,12 @@ static int dump_show(struct hisi_qm *qm, void *info,
static int qm_dump_sqc_raw(struct hisi_qm *qm, dma_addr_t dma_addr, u16 qp_id)
{
return qm_mb(qm, QM_MB_CMD_SQC, dma_addr, qp_id, 1);
return hisi_qm_mb(qm, QM_MB_CMD_SQC, dma_addr, qp_id, 1);
}
static int qm_dump_cqc_raw(struct hisi_qm *qm, dma_addr_t dma_addr, u16 qp_id)
{
return qm_mb(qm, QM_MB_CMD_CQC, dma_addr, qp_id, 1);
return hisi_qm_mb(qm, QM_MB_CMD_CQC, dma_addr, qp_id, 1);
}
static int qm_sqc_dump(struct hisi_qm *qm, const char *s)
@ -1842,7 +1820,7 @@ static int qm_eqc_aeqc_dump(struct hisi_qm *qm, char *s, size_t size,
if (IS_ERR(xeqc))
return PTR_ERR(xeqc);
ret = qm_mb(qm, cmd, xeqc_dma, 0, 1);
ret = hisi_qm_mb(qm, cmd, xeqc_dma, 0, 1);
if (ret)
goto err_free_ctx;
@ -2495,7 +2473,7 @@ unlock:
static int qm_stop_qp(struct hisi_qp *qp)
{
return qm_mb(qp->qm, QM_MB_CMD_STOP_QP, 0, qp->qp_id, 0);
return hisi_qm_mb(qp->qm, QM_MB_CMD_STOP_QP, 0, qp->qp_id, 0);
}
static int qm_set_msi(struct hisi_qm *qm, bool set)
@ -2763,7 +2741,7 @@ static int qm_sq_ctx_cfg(struct hisi_qp *qp, int qp_id, u32 pasid)
return -ENOMEM;
}
ret = qm_mb(qm, QM_MB_CMD_SQC, sqc_dma, qp_id, 0);
ret = hisi_qm_mb(qm, QM_MB_CMD_SQC, sqc_dma, qp_id, 0);
dma_unmap_single(dev, sqc_dma, sizeof(struct qm_sqc), DMA_TO_DEVICE);
kfree(sqc);
@ -2804,7 +2782,7 @@ static int qm_cq_ctx_cfg(struct hisi_qp *qp, int qp_id, u32 pasid)
return -ENOMEM;
}
ret = qm_mb(qm, QM_MB_CMD_CQC, cqc_dma, qp_id, 0);
ret = hisi_qm_mb(qm, QM_MB_CMD_CQC, cqc_dma, qp_id, 0);
dma_unmap_single(dev, cqc_dma, sizeof(struct qm_cqc), DMA_TO_DEVICE);
kfree(cqc);
@ -3514,6 +3492,12 @@ static void hisi_qm_pci_uninit(struct hisi_qm *qm)
pci_disable_device(pdev);
}
static void hisi_qm_set_state(struct hisi_qm *qm, u8 state)
{
if (qm->ver > QM_HW_V2 && qm->fun_type == QM_HW_VF)
writel(state, qm->io_base + QM_VF_STATE);
}
/**
* hisi_qm_uninit() - Uninitialize qm.
* @qm: The qm needed uninit.
@ -3542,6 +3526,7 @@ void hisi_qm_uninit(struct hisi_qm *qm)
dma_free_coherent(dev, qm->qdma.size,
qm->qdma.va, qm->qdma.dma);
}
hisi_qm_set_state(qm, QM_NOT_READY);
up_write(&qm->qps_lock);
qm_irq_unregister(qm);
@ -3655,7 +3640,7 @@ static int qm_eq_ctx_cfg(struct hisi_qm *qm)
return -ENOMEM;
}
ret = qm_mb(qm, QM_MB_CMD_EQC, eqc_dma, 0, 0);
ret = hisi_qm_mb(qm, QM_MB_CMD_EQC, eqc_dma, 0, 0);
dma_unmap_single(dev, eqc_dma, sizeof(struct qm_eqc), DMA_TO_DEVICE);
kfree(eqc);
@ -3684,7 +3669,7 @@ static int qm_aeq_ctx_cfg(struct hisi_qm *qm)
return -ENOMEM;
}
ret = qm_mb(qm, QM_MB_CMD_AEQC, aeqc_dma, 0, 0);
ret = hisi_qm_mb(qm, QM_MB_CMD_AEQC, aeqc_dma, 0, 0);
dma_unmap_single(dev, aeqc_dma, sizeof(struct qm_aeqc), DMA_TO_DEVICE);
kfree(aeqc);
@ -3723,11 +3708,11 @@ static int __hisi_qm_start(struct hisi_qm *qm)
if (ret)
return ret;
ret = qm_mb(qm, QM_MB_CMD_SQC_BT, qm->sqc_dma, 0, 0);
ret = hisi_qm_mb(qm, QM_MB_CMD_SQC_BT, qm->sqc_dma, 0, 0);
if (ret)
return ret;
ret = qm_mb(qm, QM_MB_CMD_CQC_BT, qm->cqc_dma, 0, 0);
ret = hisi_qm_mb(qm, QM_MB_CMD_CQC_BT, qm->cqc_dma, 0, 0);
if (ret)
return ret;
@ -3767,6 +3752,7 @@ int hisi_qm_start(struct hisi_qm *qm)
if (!ret)
atomic_set(&qm->status.flags, QM_START);
hisi_qm_set_state(qm, QM_READY);
err_unlock:
up_write(&qm->qps_lock);
return ret;

2
drivers/crypto/hisilicon/sec2/sec.h
View File

@ -4,7 +4,7 @@
#ifndef __HISI_SEC_V2_H
#define __HISI_SEC_V2_H
#include "../qm.h"
#include <linux/hisi_acc_qm.h>
#include "sec_crypto.h"
/* Algorithm resource per hardware SEC queue */

21
drivers/crypto/hisilicon/sec2/sec_main.c
View File

@ -20,8 +20,7 @@
#define SEC_VF_NUM 63
#define SEC_QUEUE_NUM_V1 4096
#define SEC_PF_PCI_DEVICE_ID 0xa255
#define SEC_VF_PCI_DEVICE_ID 0xa256
#define PCI_DEVICE_ID_HUAWEI_SEC_PF 0xa255
#define SEC_BD_ERR_CHK_EN0 0xEFFFFFFF
#define SEC_BD_ERR_CHK_EN1 0x7ffff7fd
@ -229,7 +228,7 @@ static const struct debugfs_reg32 sec_dfx_regs[] = {
static int sec_pf_q_num_set(const char *val, const struct kernel_param *kp)
{
return q_num_set(val, kp, SEC_PF_PCI_DEVICE_ID);
return q_num_set(val, kp, PCI_DEVICE_ID_HUAWEI_SEC_PF);
}
static const struct kernel_param_ops sec_pf_q_num_ops = {
@ -317,8 +316,8 @@ module_param_cb(uacce_mode, &sec_uacce_mode_ops, &uacce_mode, 0444);
MODULE_PARM_DESC(uacce_mode, UACCE_MODE_DESC);
static const struct pci_device_id sec_dev_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, SEC_PF_PCI_DEVICE_ID) },
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, SEC_VF_PCI_DEVICE_ID) },
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_SEC_PF) },
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_SEC_VF) },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, sec_dev_ids);
@ -748,7 +747,7 @@ static int sec_core_debug_init(struct hisi_qm *qm)
regset->base = qm->io_base;
regset->dev = dev;
if (qm->pdev->device == SEC_PF_PCI_DEVICE_ID)
if (qm->pdev->device == PCI_DEVICE_ID_HUAWEI_SEC_PF)
debugfs_create_file("regs", 0444, tmp_d, regset, &sec_regs_fops);
for (i = 0; i < ARRAY_SIZE(sec_dfx_labels); i++) {
@ -766,7 +765,7 @@ static int sec_debug_init(struct hisi_qm *qm)
struct sec_dev *sec = container_of(qm, struct sec_dev, qm);
int i;
if (qm->pdev->device == SEC_PF_PCI_DEVICE_ID) {
if (qm->pdev->device == PCI_DEVICE_ID_HUAWEI_SEC_PF) {
for (i = SEC_CLEAR_ENABLE; i < SEC_DEBUG_FILE_NUM; i++) {
spin_lock_init(&sec->debug.files[i].lock);
sec->debug.files[i].index = i;
@ -908,7 +907,7 @@ static int sec_qm_init(struct hisi_qm *qm, struct pci_dev *pdev)
qm->sqe_size = SEC_SQE_SIZE;
qm->dev_name = sec_name;
qm->fun_type = (pdev->device == SEC_PF_PCI_DEVICE_ID) ?
qm->fun_type = (pdev->device == PCI_DEVICE_ID_HUAWEI_SEC_PF) ?
QM_HW_PF : QM_HW_VF;
if (qm->fun_type == QM_HW_PF) {
qm->qp_base = SEC_PF_DEF_Q_BASE;
@ -1120,6 +1119,12 @@ static struct pci_driver sec_pci_driver = {
.driver.pm = &sec_pm_ops,
};
struct pci_driver *hisi_sec_get_pf_driver(void)
{
return &sec_pci_driver;
}
EXPORT_SYMBOL_GPL(hisi_sec_get_pf_driver);
static void sec_register_debugfs(void)
{
if (!debugfs_initialized())

2
drivers/crypto/hisilicon/sgl.c
View File

@ -1,9 +1,9 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 HiSilicon Limited. */
#include <linux/dma-mapping.h>
#include <linux/hisi_acc_qm.h>
#include <linux/module.h>
#include <linux/slab.h>
#include "qm.h"
#define HISI_ACC_SGL_SGE_NR_MIN 1
#define HISI_ACC_SGL_NR_MAX 256

2
drivers/crypto/hisilicon/zip/zip.h
View File

@ -7,7 +7,7 @@
#define pr_fmt(fmt) "hisi_zip: " fmt
#include <linux/list.h>
#include "../qm.h"
#include <linux/hisi_acc_qm.h>
enum hisi_zip_error_type {
/* negative compression */

17
drivers/crypto/hisilicon/zip/zip_main.c
View File

@ -15,8 +15,7 @@
#include <linux/uacce.h>
#include "zip.h"
#define PCI_DEVICE_ID_ZIP_PF 0xa250
#define PCI_DEVICE_ID_ZIP_VF 0xa251
#define PCI_DEVICE_ID_HUAWEI_ZIP_PF 0xa250
#define HZIP_QUEUE_NUM_V1 4096
@ -246,7 +245,7 @@ MODULE_PARM_DESC(uacce_mode, UACCE_MODE_DESC);
static int pf_q_num_set(const char *val, const struct kernel_param *kp)
{
return q_num_set(val, kp, PCI_DEVICE_ID_ZIP_PF);
return q_num_set(val, kp, PCI_DEVICE_ID_HUAWEI_ZIP_PF);
}
static const struct kernel_param_ops pf_q_num_ops = {
@ -268,8 +267,8 @@ module_param_cb(vfs_num, &vfs_num_ops, &vfs_num, 0444);
MODULE_PARM_DESC(vfs_num, "Number of VFs to enable(1-63), 0(default)");
static const struct pci_device_id hisi_zip_dev_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_ZIP_PF) },
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_ZIP_VF) },
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_ZIP_PF) },
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_ZIP_VF) },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, hisi_zip_dev_ids);
@ -838,7 +837,7 @@ static int hisi_zip_qm_init(struct hisi_qm *qm, struct pci_dev *pdev)
qm->sqe_size = HZIP_SQE_SIZE;
qm->dev_name = hisi_zip_name;
qm->fun_type = (pdev->device == PCI_DEVICE_ID_ZIP_PF) ?
qm->fun_type = (pdev->device == PCI_DEVICE_ID_HUAWEI_ZIP_PF) ?
QM_HW_PF : QM_HW_VF;
if (qm->fun_type == QM_HW_PF) {
qm->qp_base = HZIP_PF_DEF_Q_BASE;
@ -1013,6 +1012,12 @@ static struct pci_driver hisi_zip_pci_driver = {
.driver.pm = &hisi_zip_pm_ops,
};
struct pci_driver *hisi_zip_get_pf_driver(void)
{
return &hisi_zip_pci_driver;
}
EXPORT_SYMBOL_GPL(hisi_zip_get_pf_driver);
static void hisi_zip_register_debugfs(void)
{
if (!debugfs_initialized())

10
drivers/net/ethernet/mellanox/mlx5/core/cmd.c
View File

@ -478,6 +478,11 @@ static int mlx5_internal_err_ret_value(struct mlx5_core_dev *dev, u16 op,
case MLX5_CMD_OP_QUERY_VHCA_STATE:
case MLX5_CMD_OP_MODIFY_VHCA_STATE:
case MLX5_CMD_OP_ALLOC_SF:
case MLX5_CMD_OP_SUSPEND_VHCA:
case MLX5_CMD_OP_RESUME_VHCA:
case MLX5_CMD_OP_QUERY_VHCA_MIGRATION_STATE:
case MLX5_CMD_OP_SAVE_VHCA_STATE:
case MLX5_CMD_OP_LOAD_VHCA_STATE:
*status = MLX5_DRIVER_STATUS_ABORTED;
*synd = MLX5_DRIVER_SYND;
return -EIO;
@ -675,6 +680,11 @@ const char *mlx5_command_str(int command)
MLX5_COMMAND_STR_CASE(MODIFY_VHCA_STATE);
MLX5_COMMAND_STR_CASE(ALLOC_SF);
MLX5_COMMAND_STR_CASE(DEALLOC_SF);
MLX5_COMMAND_STR_CASE(SUSPEND_VHCA);
MLX5_COMMAND_STR_CASE(RESUME_VHCA);
MLX5_COMMAND_STR_CASE(QUERY_VHCA_MIGRATION_STATE);
MLX5_COMMAND_STR_CASE(SAVE_VHCA_STATE);
MLX5_COMMAND_STR_CASE(LOAD_VHCA_STATE);
default: return "unknown command opcode";
}
}

45
drivers/net/ethernet/mellanox/mlx5/core/main.c
View File

@ -1620,6 +1620,7 @@ static void remove_one(struct pci_dev *pdev)
struct devlink *devlink = priv_to_devlink(dev);
devlink_unregister(devlink);
mlx5_sriov_disable(pdev);
mlx5_crdump_disable(dev);
mlx5_drain_health_wq(dev);
mlx5_uninit_one(dev);
@ -1882,6 +1883,50 @@ static struct pci_driver mlx5_core_driver = {
.sriov_set_msix_vec_count = mlx5_core_sriov_set_msix_vec_count,
};
/**
* mlx5_vf_get_core_dev - Get the mlx5 core device from a given VF PCI device if
* mlx5_core is its driver.
* @pdev: The associated PCI device.
*
* Upon return the interface state lock stay held to let caller uses it safely.
* Caller must ensure to use the returned mlx5 device for a narrow window
* and put it back with mlx5_vf_put_core_dev() immediately once usage was over.
*
* Return: Pointer to the associated mlx5_core_dev or NULL.
*/
struct mlx5_core_dev *mlx5_vf_get_core_dev(struct pci_dev *pdev)
__acquires(&mdev->intf_state_mutex)
{
struct mlx5_core_dev *mdev;
mdev = pci_iov_get_pf_drvdata(pdev, &mlx5_core_driver);
if (IS_ERR(mdev))
return NULL;
mutex_lock(&mdev->intf_state_mutex);
if (!test_bit(MLX5_INTERFACE_STATE_UP, &mdev->intf_state)) {
mutex_unlock(&mdev->intf_state_mutex);
return NULL;
}
return mdev;
}
EXPORT_SYMBOL(mlx5_vf_get_core_dev);
/**
* mlx5_vf_put_core_dev - Put the mlx5 core device back.
* @mdev: The mlx5 core device.
*
* Upon return the interface state lock is unlocked and caller should not
* access the mdev any more.
*/
void mlx5_vf_put_core_dev(struct mlx5_core_dev *mdev)
__releases(&mdev->intf_state_mutex)
{
mutex_unlock(&mdev->intf_state_mutex);
}
EXPORT_SYMBOL(mlx5_vf_put_core_dev);
static void mlx5_core_verify_params(void)
{
if (prof_sel >= ARRAY_SIZE(profile)) {

1
drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
View File

@ -164,6 +164,7 @@ void mlx5_sriov_cleanup(struct mlx5_core_dev *dev);
int mlx5_sriov_attach(struct mlx5_core_dev *dev);
void mlx5_sriov_detach(struct mlx5_core_dev *dev);
int mlx5_core_sriov_configure(struct pci_dev *dev, int num_vfs);
void mlx5_sriov_disable(struct pci_dev *pdev);
int mlx5_core_sriov_set_msix_vec_count(struct pci_dev *vf, int msix_vec_count);
int mlx5_core_enable_hca(struct mlx5_core_dev *dev, u16 func_id);
int mlx5_core_disable_hca(struct mlx5_core_dev *dev, u16 func_id);

17
drivers/net/ethernet/mellanox/mlx5/core/sriov.c
View File

@ -161,7 +161,7 @@ static int mlx5_sriov_enable(struct pci_dev *pdev, int num_vfs)
return err;
}
static void mlx5_sriov_disable(struct pci_dev *pdev)
void mlx5_sriov_disable(struct pci_dev *pdev)
{
struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
int num_vfs = pci_num_vf(dev->pdev);
@ -205,19 +205,8 @@ int mlx5_core_sriov_set_msix_vec_count(struct pci_dev *vf, int msix_vec_count)
mlx5_get_default_msix_vec_count(dev, pci_num_vf(pf));
sriov = &dev->priv.sriov;
/* Reversed translation of PCI VF function number to the internal
* function_id, which exists in the name of virtfn symlink.
*/
for (id = 0; id < pci_num_vf(pf); id++) {
if (!sriov->vfs_ctx[id].enabled)
continue;
if (vf->devfn == pci_iov_virtfn_devfn(pf, id))
break;
}
if (id == pci_num_vf(pf) || !sriov->vfs_ctx[id].enabled)
id = pci_iov_vf_id(vf);
if (id < 0 || !sriov->vfs_ctx[id].enabled)
return -EINVAL;
return mlx5_set_msix_vec_count(dev, id + 1, msix_vec_count);

43
drivers/pci/iov.c
View File

@ -33,6 +33,49 @@ int pci_iov_virtfn_devfn(struct pci_dev *dev, int vf_id)
}
EXPORT_SYMBOL_GPL(pci_iov_virtfn_devfn);
int pci_iov_vf_id(struct pci_dev *dev)
{
struct pci_dev *pf;
if (!dev->is_virtfn)
return -EINVAL;
pf = pci_physfn(dev);
return (((dev->bus->number << 8) + dev->devfn) -
((pf->bus->number << 8) + pf->devfn + pf->sriov->offset)) /
pf->sriov->stride;
}
EXPORT_SYMBOL_GPL(pci_iov_vf_id);
/**
* pci_iov_get_pf_drvdata - Return the drvdata of a PF
* @dev: VF pci_dev
* @pf_driver: Device driver required to own the PF
*
* This must be called from a context that ensures that a VF driver is attached.
* The value returned is invalid once the VF driver completes its remove()
* callback.
*
* Locking is achieved by the driver core. A VF driver cannot be probed until
* pci_enable_sriov() is called and pci_disable_sriov() does not return until
* all VF drivers have completed their remove().
*
* The PF driver must call pci_disable_sriov() before it begins to destroy the
* drvdata.
*/
void *pci_iov_get_pf_drvdata(struct pci_dev *dev, struct pci_driver *pf_driver)
{
struct pci_dev *pf_dev;
if (!dev->is_virtfn)
return ERR_PTR(-EINVAL);
pf_dev = dev->physfn;
if (pf_dev->driver != pf_driver)
return ERR_PTR(-EINVAL);
return pci_get_drvdata(pf_dev);
}
EXPORT_SYMBOL_GPL(pci_iov_get_pf_drvdata);
/*
* Per SR-IOV spec sec 3.3.10 and 3.3.11, First VF Offset and VF Stride may
* change when NumVFs changes.

5
drivers/vfio/pci/Kconfig
View File

@ -43,4 +43,9 @@ config VFIO_PCI_IGD
To enable Intel IGD assignment through vfio-pci, say Y.
endif
source "drivers/vfio/pci/mlx5/Kconfig"
source "drivers/vfio/pci/hisilicon/Kconfig"
endif

4
drivers/vfio/pci/Makefile
View File

@ -7,3 +7,7 @@ obj-$(CONFIG_VFIO_PCI_CORE) += vfio-pci-core.o
vfio-pci-y := vfio_pci.o
vfio-pci-$(CONFIG_VFIO_PCI_IGD) += vfio_pci_igd.o
obj-$(CONFIG_VFIO_PCI) += vfio-pci.o
obj-$(CONFIG_MLX5_VFIO_PCI) += mlx5/
obj-$(CONFIG_HISI_ACC_VFIO_PCI) += hisilicon/

15
drivers/vfio/pci/hisilicon/Kconfig Normal file
View File

@ -0,0 +1,15 @@
# SPDX-License-Identifier: GPL-2.0-only
config HISI_ACC_VFIO_PCI
tristate "VFIO PCI support for HiSilicon ACC devices"
depends on ARM64 || (COMPILE_TEST && 64BIT)
depends on VFIO_PCI_CORE
depends on PCI_MSI
depends on CRYPTO_DEV_HISI_QM
depends on CRYPTO_DEV_HISI_HPRE
depends on CRYPTO_DEV_HISI_SEC2
depends on CRYPTO_DEV_HISI_ZIP
help
This provides generic PCI support for HiSilicon ACC devices
using the VFIO framework.
If you don't know what to do here, say N.

4
drivers/vfio/pci/hisilicon/Makefile Normal file
View File

@ -0,0 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_HISI_ACC_VFIO_PCI) += hisi-acc-vfio-pci.o
hisi-acc-vfio-pci-y := hisi_acc_vfio_pci.o

1326
drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c Normal file
View File

File diff suppressed because it is too large Load Diff

116
drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.h Normal file
View File

@ -0,0 +1,116 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2021 HiSilicon Ltd. */
#ifndef HISI_ACC_VFIO_PCI_H
#define HISI_ACC_VFIO_PCI_H
#include <linux/hisi_acc_qm.h>
#define MB_POLL_PERIOD_US 10
#define MB_POLL_TIMEOUT_US 1000
#define QM_CACHE_WB_START 0x204
#define QM_CACHE_WB_DONE 0x208
#define QM_MB_CMD_PAUSE_QM 0xe
#define QM_ABNORMAL_INT_STATUS 0x100008
#define QM_IFC_INT_STATUS 0x0028
#define SEC_CORE_INT_STATUS 0x301008
#define HPRE_HAC_INT_STATUS 0x301800
#define HZIP_CORE_INT_STATUS 0x3010AC
#define QM_QUE_ISO_CFG 0x301154
#define QM_VFT_CFG_RDY 0x10006c
#define QM_VFT_CFG_OP_WR 0x100058
#define QM_VFT_CFG_TYPE 0x10005c
#define QM_VFT_CFG 0x100060
#define QM_VFT_CFG_OP_ENABLE 0x100054
#define QM_VFT_CFG_DATA_L 0x100064
#define QM_VFT_CFG_DATA_H 0x100068
#define ERROR_CHECK_TIMEOUT 100
#define CHECK_DELAY_TIME 100
#define QM_SQC_VFT_BASE_SHIFT_V2 28
#define QM_SQC_VFT_BASE_MASK_V2 GENMASK(15, 0)
#define QM_SQC_VFT_NUM_SHIFT_V2 45
#define QM_SQC_VFT_NUM_MASK_V2 GENMASK(9, 0)
/* RW regs */
#define QM_REGS_MAX_LEN 7
#define QM_REG_ADDR_OFFSET 0x0004
#define QM_XQC_ADDR_OFFSET 32U
#define QM_VF_AEQ_INT_MASK 0x0004
#define QM_VF_EQ_INT_MASK 0x000c
#define QM_IFC_INT_SOURCE_V 0x0020
#define QM_IFC_INT_MASK 0x0024
#define QM_IFC_INT_SET_V 0x002c
#define QM_QUE_ISO_CFG_V 0x0030
#define QM_PAGE_SIZE 0x0034
#define QM_EQC_DW0 0X8000
#define QM_AEQC_DW0 0X8020
struct acc_vf_data {
#define QM_MATCH_SIZE offsetofend(struct acc_vf_data, qm_rsv_state)
/* QM match information */
#define ACC_DEV_MAGIC 0XCDCDCDCDFEEDAACC
u64 acc_magic;
u32 qp_num;
u32 dev_id;
u32 que_iso_cfg;
u32 qp_base;
u32 vf_qm_state;
/* QM reserved match information */
u32 qm_rsv_state[3];
/* QM RW regs */
u32 aeq_int_mask;
u32 eq_int_mask;
u32 ifc_int_source;
u32 ifc_int_mask;
u32 ifc_int_set;
u32 page_size;
/* QM_EQC_DW has 7 regs */
u32 qm_eqc_dw[7];
/* QM_AEQC_DW has 7 regs */
u32 qm_aeqc_dw[7];
/* QM reserved 5 regs */
u32 qm_rsv_regs[5];
u32 padding;
/* qm memory init information */
u64 eqe_dma;
u64 aeqe_dma;
u64 sqc_dma;
u64 cqc_dma;
};
struct hisi_acc_vf_migration_file {
struct file *filp;
struct mutex lock;
bool disabled;
struct acc_vf_data vf_data;
size_t total_length;
};
struct hisi_acc_vf_core_device {
struct vfio_pci_core_device core_device;
u8 deferred_reset:1;
/* for migration state */
struct mutex state_mutex;
enum vfio_device_mig_state mig_state;
struct pci_dev *pf_dev;
struct pci_dev *vf_dev;
struct hisi_qm *pf_qm;
struct hisi_qm vf_qm;
u32 vf_qm_state;
int vf_id;
/* for reset handler */
spinlock_t reset_lock;
struct hisi_acc_vf_migration_file *resuming_migf;
struct hisi_acc_vf_migration_file *saving_migf;
};
#endif /* HISI_ACC_VFIO_PCI_H */

10
drivers/vfio/pci/mlx5/Kconfig Normal file
View File

@ -0,0 +1,10 @@
# SPDX-License-Identifier: GPL-2.0-only
config MLX5_VFIO_PCI
tristate "VFIO support for MLX5 PCI devices"
depends on MLX5_CORE
depends on VFIO_PCI_CORE
help
This provides migration support for MLX5 devices using the VFIO
framework.
If you don't know what to do here, say N.

4
drivers/vfio/pci/mlx5/Makefile Normal file
View File

@ -0,0 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_MLX5_VFIO_PCI) += mlx5-vfio-pci.o
mlx5-vfio-pci-y := main.o cmd.o

259
drivers/vfio/pci/mlx5/cmd.c Normal file
View File

@ -0,0 +1,259 @@
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved
*/
#include "cmd.h"
int mlx5vf_cmd_suspend_vhca(struct pci_dev *pdev, u16 vhca_id, u16 op_mod)
{
struct mlx5_core_dev *mdev = mlx5_vf_get_core_dev(pdev);
u32 out[MLX5_ST_SZ_DW(suspend_vhca_out)] = {};
u32 in[MLX5_ST_SZ_DW(suspend_vhca_in)] = {};
int ret;
if (!mdev)
return -ENOTCONN;
MLX5_SET(suspend_vhca_in, in, opcode, MLX5_CMD_OP_SUSPEND_VHCA);
MLX5_SET(suspend_vhca_in, in, vhca_id, vhca_id);
MLX5_SET(suspend_vhca_in, in, op_mod, op_mod);
ret = mlx5_cmd_exec_inout(mdev, suspend_vhca, in, out);
mlx5_vf_put_core_dev(mdev);
return ret;
}
int mlx5vf_cmd_resume_vhca(struct pci_dev *pdev, u16 vhca_id, u16 op_mod)
{
struct mlx5_core_dev *mdev = mlx5_vf_get_core_dev(pdev);
u32 out[MLX5_ST_SZ_DW(resume_vhca_out)] = {};
u32 in[MLX5_ST_SZ_DW(resume_vhca_in)] = {};
int ret;
if (!mdev)
return -ENOTCONN;
MLX5_SET(resume_vhca_in, in, opcode, MLX5_CMD_OP_RESUME_VHCA);
MLX5_SET(resume_vhca_in, in, vhca_id, vhca_id);
MLX5_SET(resume_vhca_in, in, op_mod, op_mod);
ret = mlx5_cmd_exec_inout(mdev, resume_vhca, in, out);
mlx5_vf_put_core_dev(mdev);
return ret;
}
int mlx5vf_cmd_query_vhca_migration_state(struct pci_dev *pdev, u16 vhca_id,
size_t *state_size)
{
struct mlx5_core_dev *mdev = mlx5_vf_get_core_dev(pdev);
u32 out[MLX5_ST_SZ_DW(query_vhca_migration_state_out)] = {};
u32 in[MLX5_ST_SZ_DW(query_vhca_migration_state_in)] = {};
int ret;
if (!mdev)
return -ENOTCONN;
MLX5_SET(query_vhca_migration_state_in, in, opcode,
MLX5_CMD_OP_QUERY_VHCA_MIGRATION_STATE);
MLX5_SET(query_vhca_migration_state_in, in, vhca_id, vhca_id);
MLX5_SET(query_vhca_migration_state_in, in, op_mod, 0);
ret = mlx5_cmd_exec_inout(mdev, query_vhca_migration_state, in, out);
if (ret)
goto end;
*state_size = MLX5_GET(query_vhca_migration_state_out, out,
required_umem_size);
end:
mlx5_vf_put_core_dev(mdev);
return ret;
}
int mlx5vf_cmd_get_vhca_id(struct pci_dev *pdev, u16 function_id, u16 *vhca_id)
{
struct mlx5_core_dev *mdev = mlx5_vf_get_core_dev(pdev);
u32 in[MLX5_ST_SZ_DW(query_hca_cap_in)] = {};
int out_size;
void *out;
int ret;
if (!mdev)
return -ENOTCONN;
out_size = MLX5_ST_SZ_BYTES(query_hca_cap_out);
out = kzalloc(out_size, GFP_KERNEL);
if (!out) {
ret = -ENOMEM;
goto end;
}
MLX5_SET(query_hca_cap_in, in, opcode, MLX5_CMD_OP_QUERY_HCA_CAP);
MLX5_SET(query_hca_cap_in, in, other_function, 1);
MLX5_SET(query_hca_cap_in, in, function_id, function_id);
MLX5_SET(query_hca_cap_in, in, op_mod,
MLX5_SET_HCA_CAP_OP_MOD_GENERAL_DEVICE << 1 |
HCA_CAP_OPMOD_GET_CUR);
ret = mlx5_cmd_exec_inout(mdev, query_hca_cap, in, out);
if (ret)
goto err_exec;
*vhca_id = MLX5_GET(query_hca_cap_out, out,
capability.cmd_hca_cap.vhca_id);
err_exec:
kfree(out);
end:
mlx5_vf_put_core_dev(mdev);
return ret;
}
static int _create_state_mkey(struct mlx5_core_dev *mdev, u32 pdn,
struct mlx5_vf_migration_file *migf, u32 *mkey)
{
size_t npages = DIV_ROUND_UP(migf->total_length, PAGE_SIZE);
struct sg_dma_page_iter dma_iter;
int err = 0, inlen;
__be64 *mtt;
void *mkc;
u32 *in;
inlen = MLX5_ST_SZ_BYTES(create_mkey_in) +
sizeof(*mtt) * round_up(npages, 2);
in = kvzalloc(inlen, GFP_KERNEL);
if (!in)
return -ENOMEM;
MLX5_SET(create_mkey_in, in, translations_octword_actual_size,
DIV_ROUND_UP(npages, 2));
mtt = (__be64 *)MLX5_ADDR_OF(create_mkey_in, in, klm_pas_mtt);
for_each_sgtable_dma_page(&migf->table.sgt, &dma_iter, 0)
*mtt++ = cpu_to_be64(sg_page_iter_dma_address(&dma_iter));
mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
MLX5_SET(mkc, mkc, access_mode_1_0, MLX5_MKC_ACCESS_MODE_MTT);
MLX5_SET(mkc, mkc, lr, 1);
MLX5_SET(mkc, mkc, lw, 1);
MLX5_SET(mkc, mkc, rr, 1);
MLX5_SET(mkc, mkc, rw, 1);
MLX5_SET(mkc, mkc, pd, pdn);
MLX5_SET(mkc, mkc, bsf_octword_size, 0);
MLX5_SET(mkc, mkc, qpn, 0xffffff);
MLX5_SET(mkc, mkc, log_page_size, PAGE_SHIFT);
MLX5_SET(mkc, mkc, translations_octword_size, DIV_ROUND_UP(npages, 2));
MLX5_SET64(mkc, mkc, len, migf->total_length);
err = mlx5_core_create_mkey(mdev, mkey, in, inlen);
kvfree(in);
return err;
}
int mlx5vf_cmd_save_vhca_state(struct pci_dev *pdev, u16 vhca_id,
struct mlx5_vf_migration_file *migf)
{
struct mlx5_core_dev *mdev = mlx5_vf_get_core_dev(pdev);
u32 out[MLX5_ST_SZ_DW(save_vhca_state_out)] = {};
u32 in[MLX5_ST_SZ_DW(save_vhca_state_in)] = {};
u32 pdn, mkey;
int err;
if (!mdev)
return -ENOTCONN;
err = mlx5_core_alloc_pd(mdev, &pdn);
if (err)
goto end;
err = dma_map_sgtable(mdev->device, &migf->table.sgt, DMA_FROM_DEVICE,
0);
if (err)
goto err_dma_map;
err = _create_state_mkey(mdev, pdn, migf, &mkey);
if (err)
goto err_create_mkey;
MLX5_SET(save_vhca_state_in, in, opcode,
MLX5_CMD_OP_SAVE_VHCA_STATE);
MLX5_SET(save_vhca_state_in, in, op_mod, 0);
MLX5_SET(save_vhca_state_in, in, vhca_id, vhca_id);
MLX5_SET(save_vhca_state_in, in, mkey, mkey);
MLX5_SET(save_vhca_state_in, in, size, migf->total_length);
err = mlx5_cmd_exec_inout(mdev, save_vhca_state, in, out);
if (err)
goto err_exec;
migf->total_length =
MLX5_GET(save_vhca_state_out, out, actual_image_size);
mlx5_core_destroy_mkey(mdev, mkey);
mlx5_core_dealloc_pd(mdev, pdn);
dma_unmap_sgtable(mdev->device, &migf->table.sgt, DMA_FROM_DEVICE, 0);
mlx5_vf_put_core_dev(mdev);
return 0;
err_exec:
mlx5_core_destroy_mkey(mdev, mkey);
err_create_mkey:
dma_unmap_sgtable(mdev->device, &migf->table.sgt, DMA_FROM_DEVICE, 0);
err_dma_map:
mlx5_core_dealloc_pd(mdev, pdn);
end:
mlx5_vf_put_core_dev(mdev);
return err;
}
int mlx5vf_cmd_load_vhca_state(struct pci_dev *pdev, u16 vhca_id,
struct mlx5_vf_migration_file *migf)
{
struct mlx5_core_dev *mdev = mlx5_vf_get_core_dev(pdev);
u32 out[MLX5_ST_SZ_DW(save_vhca_state_out)] = {};
u32 in[MLX5_ST_SZ_DW(save_vhca_state_in)] = {};
u32 pdn, mkey;
int err;
if (!mdev)
return -ENOTCONN;
mutex_lock(&migf->lock);
if (!migf->total_length) {
err = -EINVAL;
goto end;
}
err = mlx5_core_alloc_pd(mdev, &pdn);
if (err)
goto end;
err = dma_map_sgtable(mdev->device, &migf->table.sgt, DMA_TO_DEVICE, 0);
if (err)
goto err_reg;
err = _create_state_mkey(mdev, pdn, migf, &mkey);
if (err)
goto err_mkey;
MLX5_SET(load_vhca_state_in, in, opcode,
MLX5_CMD_OP_LOAD_VHCA_STATE);
MLX5_SET(load_vhca_state_in, in, op_mod, 0);
MLX5_SET(load_vhca_state_in, in, vhca_id, vhca_id);
MLX5_SET(load_vhca_state_in, in, mkey, mkey);
MLX5_SET(load_vhca_state_in, in, size, migf->total_length);
err = mlx5_cmd_exec_inout(mdev, load_vhca_state, in, out);
mlx5_core_destroy_mkey(mdev, mkey);
err_mkey:
dma_unmap_sgtable(mdev->device, &migf->table.sgt, DMA_TO_DEVICE, 0);
err_reg:
mlx5_core_dealloc_pd(mdev, pdn);
end:
mlx5_vf_put_core_dev(mdev);
mutex_unlock(&migf->lock);
return err;
}

36
drivers/vfio/pci/mlx5/cmd.h Normal file
View File

@ -0,0 +1,36 @@
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/*
* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
*/
#ifndef MLX5_VFIO_CMD_H
#define MLX5_VFIO_CMD_H
#include <linux/kernel.h>
#include <linux/mlx5/driver.h>
struct mlx5_vf_migration_file {
struct file *filp;
struct mutex lock;
bool disabled;
struct sg_append_table table;
size_t total_length;
size_t allocated_length;
/* Optimize mlx5vf_get_migration_page() for sequential access */
struct scatterlist *last_offset_sg;
unsigned int sg_last_entry;
unsigned long last_offset;
};
int mlx5vf_cmd_suspend_vhca(struct pci_dev *pdev, u16 vhca_id, u16 op_mod);
int mlx5vf_cmd_resume_vhca(struct pci_dev *pdev, u16 vhca_id, u16 op_mod);
int mlx5vf_cmd_query_vhca_migration_state(struct pci_dev *pdev, u16 vhca_id,
size_t *state_size);
int mlx5vf_cmd_get_vhca_id(struct pci_dev *pdev, u16 function_id, u16 *vhca_id);
int mlx5vf_cmd_save_vhca_state(struct pci_dev *pdev, u16 vhca_id,
struct mlx5_vf_migration_file *migf);
int mlx5vf_cmd_load_vhca_state(struct pci_dev *pdev, u16 vhca_id,
struct mlx5_vf_migration_file *migf);
#endif /* MLX5_VFIO_CMD_H */

676
drivers/vfio/pci/mlx5/main.c Normal file
View File

@ -0,0 +1,676 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved
*/
#include <linux/device.h>
#include <linux/eventfd.h>
#include <linux/file.h>
#include <linux/interrupt.h>
#include <linux/iommu.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <linux/pci.h>
#include <linux/pm_runtime.h>
#include <linux/types.h>
#include <linux/uaccess.h>
#include <linux/vfio.h>
#include <linux/sched/mm.h>
#include <linux/vfio_pci_core.h>
#include <linux/anon_inodes.h>
#include "cmd.h"
/* Arbitrary to prevent userspace from consuming endless memory */
#define MAX_MIGRATION_SIZE (512*1024*1024)
struct mlx5vf_pci_core_device {
struct vfio_pci_core_device core_device;
u16 vhca_id;
u8 migrate_cap:1;
u8 deferred_reset:1;
/* protect migration state */
struct mutex state_mutex;
enum vfio_device_mig_state mig_state;
/* protect the reset_done flow */
spinlock_t reset_lock;
struct mlx5_vf_migration_file *resuming_migf;
struct mlx5_vf_migration_file *saving_migf;
};
static struct page *
mlx5vf_get_migration_page(struct mlx5_vf_migration_file *migf,
unsigned long offset)
{
unsigned long cur_offset = 0;
struct scatterlist *sg;
unsigned int i;
/* All accesses are sequential */
if (offset < migf->last_offset || !migf->last_offset_sg) {
migf->last_offset = 0;
migf->last_offset_sg = migf->table.sgt.sgl;
migf->sg_last_entry = 0;
}
cur_offset = migf->last_offset;
for_each_sg(migf->last_offset_sg, sg,
migf->table.sgt.orig_nents - migf->sg_last_entry, i) {
if (offset < sg->length + cur_offset) {
migf->last_offset_sg = sg;
migf->sg_last_entry += i;
migf->last_offset = cur_offset;
return nth_page(sg_page(sg),
(offset - cur_offset) / PAGE_SIZE);
}
cur_offset += sg->length;
}
return NULL;
}
static int mlx5vf_add_migration_pages(struct mlx5_vf_migration_file *migf,
unsigned int npages)
{
unsigned int to_alloc = npages;
struct page **page_list;
unsigned long filled;
unsigned int to_fill;
int ret;
to_fill = min_t(unsigned int, npages, PAGE_SIZE / sizeof(*page_list));
page_list = kvzalloc(to_fill * sizeof(*page_list), GFP_KERNEL);
if (!page_list)
return -ENOMEM;
do {
filled = alloc_pages_bulk_array(GFP_KERNEL, to_fill, page_list);
if (!filled) {
ret = -ENOMEM;
goto err;
}
to_alloc -= filled;
ret = sg_alloc_append_table_from_pages(
&migf->table, page_list, filled, 0,
filled << PAGE_SHIFT, UINT_MAX, SG_MAX_SINGLE_ALLOC,
GFP_KERNEL);
if (ret)
goto err;
migf->allocated_length += filled * PAGE_SIZE;
/* clean input for another bulk allocation */
memset(page_list, 0, filled * sizeof(*page_list));
to_fill = min_t(unsigned int, to_alloc,
PAGE_SIZE / sizeof(*page_list));
} while (to_alloc > 0);
kvfree(page_list);
return 0;
err:
kvfree(page_list);
return ret;
}
static void mlx5vf_disable_fd(struct mlx5_vf_migration_file *migf)
{
struct sg_page_iter sg_iter;
mutex_lock(&migf->lock);
/* Undo alloc_pages_bulk_array() */
for_each_sgtable_page(&migf->table.sgt, &sg_iter, 0)
__free_page(sg_page_iter_page(&sg_iter));
sg_free_append_table(&migf->table);
migf->disabled = true;
migf->total_length = 0;
migf->allocated_length = 0;
migf->filp->f_pos = 0;
mutex_unlock(&migf->lock);
}
static int mlx5vf_release_file(struct inode *inode, struct file *filp)
{
struct mlx5_vf_migration_file *migf = filp->private_data;
mlx5vf_disable_fd(migf);
mutex_destroy(&migf->lock);
kfree(migf);
return 0;
}
static ssize_t mlx5vf_save_read(struct file *filp, char __user *buf, size_t len,
loff_t *pos)
{
struct mlx5_vf_migration_file *migf = filp->private_data;
ssize_t done = 0;
if (pos)
return -ESPIPE;
pos = &filp->f_pos;
mutex_lock(&migf->lock);
if (*pos > migf->total_length) {
done = -EINVAL;
goto out_unlock;
}
if (migf->disabled) {
done = -ENODEV;
goto out_unlock;
}
len = min_t(size_t, migf->total_length - *pos, len);
while (len) {
size_t page_offset;
struct page *page;
size_t page_len;
u8 *from_buff;
int ret;
page_offset = (*pos) % PAGE_SIZE;
page = mlx5vf_get_migration_page(migf, *pos - page_offset);
if (!page) {
if (done == 0)
done = -EINVAL;
goto out_unlock;
}
page_len = min_t(size_t, len, PAGE_SIZE - page_offset);
from_buff = kmap_local_page(page);
ret = copy_to_user(buf, from_buff + page_offset, page_len);
kunmap_local(from_buff);
if (ret) {
done = -EFAULT;
goto out_unlock;
}
*pos += page_len;
len -= page_len;
done += page_len;
buf += page_len;
}
out_unlock:
mutex_unlock(&migf->lock);
return done;
}
static const struct file_operations mlx5vf_save_fops = {
.owner = THIS_MODULE,
.read = mlx5vf_save_read,
.release = mlx5vf_release_file,
.llseek = no_llseek,
};
static struct mlx5_vf_migration_file *
mlx5vf_pci_save_device_data(struct mlx5vf_pci_core_device *mvdev)
{
struct mlx5_vf_migration_file *migf;
int ret;
migf = kzalloc(sizeof(*migf), GFP_KERNEL);
if (!migf)
return ERR_PTR(-ENOMEM);
migf->filp = anon_inode_getfile("mlx5vf_mig", &mlx5vf_save_fops, migf,
O_RDONLY);
if (IS_ERR(migf->filp)) {
int err = PTR_ERR(migf->filp);
kfree(migf);
return ERR_PTR(err);
}
stream_open(migf->filp->f_inode, migf->filp);
mutex_init(&migf->lock);
ret = mlx5vf_cmd_query_vhca_migration_state(
mvdev->core_device.pdev, mvdev->vhca_id, &migf->total_length);
if (ret)
goto out_free;
ret = mlx5vf_add_migration_pages(
migf, DIV_ROUND_UP_ULL(migf->total_length, PAGE_SIZE));
if (ret)
goto out_free;
ret = mlx5vf_cmd_save_vhca_state(mvdev->core_device.pdev,
mvdev->vhca_id, migf);
if (ret)
goto out_free;
return migf;
out_free:
fput(migf->filp);
return ERR_PTR(ret);
}
static ssize_t mlx5vf_resume_write(struct file *filp, const char __user *buf,
size_t len, loff_t *pos)
{
struct mlx5_vf_migration_file *migf = filp->private_data;
loff_t requested_length;
ssize_t done = 0;
if (pos)
return -ESPIPE;
pos = &filp->f_pos;
if (*pos < 0 ||
check_add_overflow((loff_t)len, *pos, &requested_length))
return -EINVAL;
if (requested_length > MAX_MIGRATION_SIZE)
return -ENOMEM;
mutex_lock(&migf->lock);
if (migf->disabled) {
done = -ENODEV;
goto out_unlock;
}
if (migf->allocated_length < requested_length) {
done = mlx5vf_add_migration_pages(
migf,
DIV_ROUND_UP(requested_length - migf->allocated_length,
PAGE_SIZE));
if (done)
goto out_unlock;
}
while (len) {
size_t page_offset;
struct page *page;
size_t page_len;
u8 *to_buff;
int ret;
page_offset = (*pos) % PAGE_SIZE;
page = mlx5vf_get_migration_page(migf, *pos - page_offset);
if (!page) {
if (done == 0)
done = -EINVAL;
goto out_unlock;
}
page_len = min_t(size_t, len, PAGE_SIZE - page_offset);
to_buff = kmap_local_page(page);
ret = copy_from_user(to_buff + page_offset, buf, page_len);
kunmap_local(to_buff);
if (ret) {
done = -EFAULT;
goto out_unlock;
}
*pos += page_len;
len -= page_len;
done += page_len;
buf += page_len;
migf->total_length += page_len;
}
out_unlock:
mutex_unlock(&migf->lock);
return done;
}
static const struct file_operations mlx5vf_resume_fops = {
.owner = THIS_MODULE,
.write = mlx5vf_resume_write,
.release = mlx5vf_release_file,
.llseek = no_llseek,
};
static struct mlx5_vf_migration_file *
mlx5vf_pci_resume_device_data(struct mlx5vf_pci_core_device *mvdev)
{
struct mlx5_vf_migration_file *migf;
migf = kzalloc(sizeof(*migf), GFP_KERNEL);
if (!migf)
return ERR_PTR(-ENOMEM);
migf->filp = anon_inode_getfile("mlx5vf_mig", &mlx5vf_resume_fops, migf,
O_WRONLY);
if (IS_ERR(migf->filp)) {
int err = PTR_ERR(migf->filp);
kfree(migf);
return ERR_PTR(err);
}
stream_open(migf->filp->f_inode, migf->filp);
mutex_init(&migf->lock);
return migf;
}
static void mlx5vf_disable_fds(struct mlx5vf_pci_core_device *mvdev)
{
if (mvdev->resuming_migf) {
mlx5vf_disable_fd(mvdev->resuming_migf);
fput(mvdev->resuming_migf->filp);
mvdev->resuming_migf = NULL;
}
if (mvdev->saving_migf) {
mlx5vf_disable_fd(mvdev->saving_migf);
fput(mvdev->saving_migf->filp);
mvdev->saving_migf = NULL;
}
}
static struct file *
mlx5vf_pci_step_device_state_locked(struct mlx5vf_pci_core_device *mvdev,
u32 new)
{
u32 cur = mvdev->mig_state;
int ret;
if (cur == VFIO_DEVICE_STATE_RUNNING_P2P && new == VFIO_DEVICE_STATE_STOP) {
ret = mlx5vf_cmd_suspend_vhca(
mvdev->core_device.pdev, mvdev->vhca_id,
MLX5_SUSPEND_VHCA_IN_OP_MOD_SUSPEND_RESPONDER);
if (ret)
return ERR_PTR(ret);
return NULL;
}
if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_RUNNING_P2P) {
ret = mlx5vf_cmd_resume_vhca(
mvdev->core_device.pdev, mvdev->vhca_id,
MLX5_RESUME_VHCA_IN_OP_MOD_RESUME_RESPONDER);
if (ret)
return ERR_PTR(ret);
return NULL;
}
if (cur == VFIO_DEVICE_STATE_RUNNING && new == VFIO_DEVICE_STATE_RUNNING_P2P) {
ret = mlx5vf_cmd_suspend_vhca(
mvdev->core_device.pdev, mvdev->vhca_id,
MLX5_SUSPEND_VHCA_IN_OP_MOD_SUSPEND_INITIATOR);
if (ret)
return ERR_PTR(ret);
return NULL;
}
if (cur == VFIO_DEVICE_STATE_RUNNING_P2P && new == VFIO_DEVICE_STATE_RUNNING) {
ret = mlx5vf_cmd_resume_vhca(
mvdev->core_device.pdev, mvdev->vhca_id,
MLX5_RESUME_VHCA_IN_OP_MOD_RESUME_INITIATOR);
if (ret)
return ERR_PTR(ret);
return NULL;
}
if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_STOP_COPY) {
struct mlx5_vf_migration_file *migf;
migf = mlx5vf_pci_save_device_data(mvdev);
if (IS_ERR(migf))
return ERR_CAST(migf);
get_file(migf->filp);
mvdev->saving_migf = migf;
return migf->filp;
}
if ((cur == VFIO_DEVICE_STATE_STOP_COPY && new == VFIO_DEVICE_STATE_STOP)) {
mlx5vf_disable_fds(mvdev);
return NULL;
}
if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_RESUMING) {
struct mlx5_vf_migration_file *migf;
migf = mlx5vf_pci_resume_device_data(mvdev);
if (IS_ERR(migf))
return ERR_CAST(migf);
get_file(migf->filp);
mvdev->resuming_migf = migf;
return migf->filp;
}
if (cur == VFIO_DEVICE_STATE_RESUMING && new == VFIO_DEVICE_STATE_STOP) {
ret = mlx5vf_cmd_load_vhca_state(mvdev->core_device.pdev,
mvdev->vhca_id,
mvdev->resuming_migf);
if (ret)
return ERR_PTR(ret);
mlx5vf_disable_fds(mvdev);
return NULL;
}
/*
* vfio_mig_get_next_state() does not use arcs other than the above
*/
WARN_ON(true);
return ERR_PTR(-EINVAL);
}
/*
* This function is called in all state_mutex unlock cases to
* handle a 'deferred_reset' if exists.
*/
static void mlx5vf_state_mutex_unlock(struct mlx5vf_pci_core_device *mvdev)
{
again:
spin_lock(&mvdev->reset_lock);
if (mvdev->deferred_reset) {
mvdev->deferred_reset = false;
spin_unlock(&mvdev->reset_lock);
mvdev->mig_state = VFIO_DEVICE_STATE_RUNNING;
mlx5vf_disable_fds(mvdev);
goto again;
}
mutex_unlock(&mvdev->state_mutex);
spin_unlock(&mvdev->reset_lock);
}
static struct file *
mlx5vf_pci_set_device_state(struct vfio_device *vdev,
enum vfio_device_mig_state new_state)
{
struct mlx5vf_pci_core_device *mvdev = container_of(
vdev, struct mlx5vf_pci_core_device, core_device.vdev);
enum vfio_device_mig_state next_state;
struct file *res = NULL;
int ret;
mutex_lock(&mvdev->state_mutex);
while (new_state != mvdev->mig_state) {
ret = vfio_mig_get_next_state(vdev, mvdev->mig_state,
new_state, &next_state);
if (ret) {
res = ERR_PTR(ret);
break;
}
res = mlx5vf_pci_step_device_state_locked(mvdev, next_state);
if (IS_ERR(res))
break;
mvdev->mig_state = next_state;
if (WARN_ON(res && new_state != mvdev->mig_state)) {
fput(res);
res = ERR_PTR(-EINVAL);
break;
}
}
mlx5vf_state_mutex_unlock(mvdev);
return res;
}
static int mlx5vf_pci_get_device_state(struct vfio_device *vdev,
enum vfio_device_mig_state *curr_state)
{
struct mlx5vf_pci_core_device *mvdev = container_of(
vdev, struct mlx5vf_pci_core_device, core_device.vdev);
mutex_lock(&mvdev->state_mutex);
*curr_state = mvdev->mig_state;
mlx5vf_state_mutex_unlock(mvdev);
return 0;
}
static void mlx5vf_pci_aer_reset_done(struct pci_dev *pdev)
{
struct mlx5vf_pci_core_device *mvdev = dev_get_drvdata(&pdev->dev);
if (!mvdev->migrate_cap)
return;
/*
* As the higher VFIO layers are holding locks across reset and using
* those same locks with the mm_lock we need to prevent ABBA deadlock
* with the state_mutex and mm_lock.
* In case the state_mutex was taken already we defer the cleanup work
* to the unlock flow of the other running context.
*/
spin_lock(&mvdev->reset_lock);
mvdev->deferred_reset = true;
if (!mutex_trylock(&mvdev->state_mutex)) {
spin_unlock(&mvdev->reset_lock);
return;
}
spin_unlock(&mvdev->reset_lock);
mlx5vf_state_mutex_unlock(mvdev);
}
static int mlx5vf_pci_open_device(struct vfio_device *core_vdev)
{
struct mlx5vf_pci_core_device *mvdev = container_of(
core_vdev, struct mlx5vf_pci_core_device, core_device.vdev);
struct vfio_pci_core_device *vdev = &mvdev->core_device;
int vf_id;
int ret;
ret = vfio_pci_core_enable(vdev);
if (ret)
return ret;
if (!mvdev->migrate_cap) {
vfio_pci_core_finish_enable(vdev);
return 0;
}
vf_id = pci_iov_vf_id(vdev->pdev);
if (vf_id < 0) {
ret = vf_id;
goto out_disable;
}
ret = mlx5vf_cmd_get_vhca_id(vdev->pdev, vf_id + 1, &mvdev->vhca_id);
if (ret)
goto out_disable;
mvdev->mig_state = VFIO_DEVICE_STATE_RUNNING;
vfio_pci_core_finish_enable(vdev);
return 0;
out_disable:
vfio_pci_core_disable(vdev);
return ret;
}
static void mlx5vf_pci_close_device(struct vfio_device *core_vdev)
{
struct mlx5vf_pci_core_device *mvdev = container_of(
core_vdev, struct mlx5vf_pci_core_device, core_device.vdev);
mlx5vf_disable_fds(mvdev);
vfio_pci_core_close_device(core_vdev);
}
static const struct vfio_device_ops mlx5vf_pci_ops = {
.name = "mlx5-vfio-pci",
.open_device = mlx5vf_pci_open_device,
.close_device = mlx5vf_pci_close_device,
.ioctl = vfio_pci_core_ioctl,
.device_feature = vfio_pci_core_ioctl_feature,
.read = vfio_pci_core_read,
.write = vfio_pci_core_write,
.mmap = vfio_pci_core_mmap,
.request = vfio_pci_core_request,
.match = vfio_pci_core_match,
.migration_set_state = mlx5vf_pci_set_device_state,
.migration_get_state = mlx5vf_pci_get_device_state,
};
static int mlx5vf_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct mlx5vf_pci_core_device *mvdev;
int ret;
mvdev = kzalloc(sizeof(*mvdev), GFP_KERNEL);
if (!mvdev)
return -ENOMEM;
vfio_pci_core_init_device(&mvdev->core_device, pdev, &mlx5vf_pci_ops);
if (pdev->is_virtfn) {
struct mlx5_core_dev *mdev =
mlx5_vf_get_core_dev(pdev);
if (mdev) {
if (MLX5_CAP_GEN(mdev, migration)) {
mvdev->migrate_cap = 1;
mvdev->core_device.vdev.migration_flags =
VFIO_MIGRATION_STOP_COPY |
VFIO_MIGRATION_P2P;
mutex_init(&mvdev->state_mutex);
spin_lock_init(&mvdev->reset_lock);
}
mlx5_vf_put_core_dev(mdev);
}
}
ret = vfio_pci_core_register_device(&mvdev->core_device);
if (ret)
goto out_free;
dev_set_drvdata(&pdev->dev, mvdev);
return 0;
out_free:
vfio_pci_core_uninit_device(&mvdev->core_device);
kfree(mvdev);
return ret;
}
static void mlx5vf_pci_remove(struct pci_dev *pdev)
{
struct mlx5vf_pci_core_device *mvdev = dev_get_drvdata(&pdev->dev);
vfio_pci_core_unregister_device(&mvdev->core_device);
vfio_pci_core_uninit_device(&mvdev->core_device);
kfree(mvdev);
}
static const struct pci_device_id mlx5vf_pci_table[] = {
{ PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_MELLANOX, 0x101e) }, /* ConnectX Family mlx5Gen Virtual Function */
{}
};
MODULE_DEVICE_TABLE(pci, mlx5vf_pci_table);
static const struct pci_error_handlers mlx5vf_err_handlers = {
.reset_done = mlx5vf_pci_aer_reset_done,
.error_detected = vfio_pci_core_aer_err_detected,
};
static struct pci_driver mlx5vf_pci_driver = {
.name = KBUILD_MODNAME,
.id_table = mlx5vf_pci_table,
.probe = mlx5vf_pci_probe,
.remove = mlx5vf_pci_remove,
.err_handler = &mlx5vf_err_handlers,
};
static void __exit mlx5vf_pci_cleanup(void)
{
pci_unregister_driver(&mlx5vf_pci_driver);
}
static int __init mlx5vf_pci_init(void)
{
return pci_register_driver(&mlx5vf_pci_driver);
}
module_init(mlx5vf_pci_init);
module_exit(mlx5vf_pci_cleanup);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Max Gurtovoy <mgurtovoy@nvidia.com>");
MODULE_AUTHOR("Yishai Hadas <yishaih@nvidia.com>");
MODULE_DESCRIPTION(
"MLX5 VFIO PCI - User Level meta-driver for MLX5 device family");

1
drivers/vfio/pci/vfio_pci.c
View File

@ -130,6 +130,7 @@ static const struct vfio_device_ops vfio_pci_ops = {
.open_device = vfio_pci_open_device,
.close_device = vfio_pci_core_close_device,
.ioctl = vfio_pci_core_ioctl,
.device_feature = vfio_pci_core_ioctl_feature,
.read = vfio_pci_core_read,
.write = vfio_pci_core_write,
.mmap = vfio_pci_core_mmap,

168
drivers/vfio/pci/vfio_pci_core.c
View File

@ -228,6 +228,19 @@ int vfio_pci_set_power_state(struct vfio_pci_core_device *vdev, pci_power_t stat
if (!ret) {
/* D3 might be unsupported via quirk, skip unless in D3 */
if (needs_save && pdev->current_state >= PCI_D3hot) {
/*
* The current PCI state will be saved locally in
* 'pm_save' during the D3hot transition. When the
* device state is changed to D0 again with the current
* function, then pci_store_saved_state() will restore
* the state and will free the memory pointed by
* 'pm_save'. There are few cases where the PCI power
* state can be changed to D0 without the involvement
* of the driver. For these cases, free the earlier
* allocated memory first before overwriting 'pm_save'
* to prevent the memory leak.
*/
kfree(vdev->pm_save);
vdev->pm_save = pci_store_saved_state(pdev);
} else if (needs_restore) {
pci_load_and_free_saved_state(pdev, &vdev->pm_save);
@ -322,6 +335,17 @@ void vfio_pci_core_disable(struct vfio_pci_core_device *vdev)
/* For needs_reset */
lockdep_assert_held(&vdev->vdev.dev_set->lock);
/*
* This function can be invoked while the power state is non-D0.
* This function calls __pci_reset_function_locked() which internally
* can use pci_pm_reset() for the function reset. pci_pm_reset() will
* fail if the power state is non-D0. Also, for the devices which
* have NoSoftRst-, the reset function can cause the PCI config space
* reset without restoring the original state (saved locally in
* 'vdev->pm_save').
*/
vfio_pci_set_power_state(vdev, PCI_D0);
/* Stop the device from further DMA */
pci_clear_master(pdev);
@ -921,6 +945,19 @@ long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd,
return -EINVAL;
vfio_pci_zap_and_down_write_memory_lock(vdev);
/*
* This function can be invoked while the power state is non-D0.
* If pci_try_reset_function() has been called while the power
* state is non-D0, then pci_try_reset_function() will
* internally set the power state to D0 without vfio driver
* involvement. For the devices which have NoSoftRst-, the
* reset function can cause the PCI config space reset without
* restoring the original state (saved locally in
* 'vdev->pm_save').
*/
vfio_pci_set_power_state(vdev, PCI_D0);
ret = pci_try_reset_function(vdev->pdev);
up_write(&vdev->memory_lock);
@ -1114,71 +1151,51 @@ hot_reset_release:
return vfio_pci_ioeventfd(vdev, ioeventfd.offset,
ioeventfd.data, count, ioeventfd.fd);
} else if (cmd == VFIO_DEVICE_FEATURE) {
struct vfio_device_feature feature;
uuid_t uuid;
minsz = offsetofend(struct vfio_device_feature, flags);
if (copy_from_user(&feature, (void __user *)arg, minsz))
return -EFAULT;
if (feature.argsz < minsz)
return -EINVAL;
/* Check unknown flags */
if (feature.flags & ~(VFIO_DEVICE_FEATURE_MASK |
VFIO_DEVICE_FEATURE_SET |
VFIO_DEVICE_FEATURE_GET |
VFIO_DEVICE_FEATURE_PROBE))
return -EINVAL;
/* GET & SET are mutually exclusive except with PROBE */
if (!(feature.flags & VFIO_DEVICE_FEATURE_PROBE) &&
(feature.flags & VFIO_DEVICE_FEATURE_SET) &&
(feature.flags & VFIO_DEVICE_FEATURE_GET))
return -EINVAL;
switch (feature.flags & VFIO_DEVICE_FEATURE_MASK) {
case VFIO_DEVICE_FEATURE_PCI_VF_TOKEN:
if (!vdev->vf_token)
return -ENOTTY;
/*
* We do not support GET of the VF Token UUID as this
* could expose the token of the previous device user.
*/
if (feature.flags & VFIO_DEVICE_FEATURE_GET)
return -EINVAL;
if (feature.flags & VFIO_DEVICE_FEATURE_PROBE)
return 0;
/* Don't SET unless told to do so */
if (!(feature.flags & VFIO_DEVICE_FEATURE_SET))
return -EINVAL;
if (feature.argsz < minsz + sizeof(uuid))
return -EINVAL;
if (copy_from_user(&uuid, (void __user *)(arg + minsz),
sizeof(uuid)))
return -EFAULT;
mutex_lock(&vdev->vf_token->lock);
uuid_copy(&vdev->vf_token->uuid, &uuid);
mutex_unlock(&vdev->vf_token->lock);
return 0;
default:
return -ENOTTY;
}
}
return -ENOTTY;
}
EXPORT_SYMBOL_GPL(vfio_pci_core_ioctl);
static int vfio_pci_core_feature_token(struct vfio_device *device, u32 flags,
void __user *arg, size_t argsz)
{
struct vfio_pci_core_device *vdev =
container_of(device, struct vfio_pci_core_device, vdev);
uuid_t uuid;
int ret;
if (!vdev->vf_token)
return -ENOTTY;
/*
* We do not support GET of the VF Token UUID as this could
* expose the token of the previous device user.
*/
ret = vfio_check_feature(flags, argsz, VFIO_DEVICE_FEATURE_SET,
sizeof(uuid));
if (ret != 1)
return ret;
if (copy_from_user(&uuid, arg, sizeof(uuid)))
return -EFAULT;
mutex_lock(&vdev->vf_token->lock);
uuid_copy(&vdev->vf_token->uuid, &uuid);
mutex_unlock(&vdev->vf_token->lock);
return 0;
}
int vfio_pci_core_ioctl_feature(struct vfio_device *device, u32 flags,
void __user *arg, size_t argsz)
{
switch (flags & VFIO_DEVICE_FEATURE_MASK) {
case VFIO_DEVICE_FEATURE_PCI_VF_TOKEN:
return vfio_pci_core_feature_token(device, flags, arg, argsz);
default:
return -ENOTTY;
}
}
EXPORT_SYMBOL_GPL(vfio_pci_core_ioctl_feature);
static ssize_t vfio_pci_rw(struct vfio_pci_core_device *vdev, char __user *buf,
size_t count, loff_t *ppos, bool iswrite)
{
@ -1891,8 +1908,8 @@ void vfio_pci_core_unregister_device(struct vfio_pci_core_device *vdev)
}
EXPORT_SYMBOL_GPL(vfio_pci_core_unregister_device);
static pci_ers_result_t vfio_pci_aer_err_detected(struct pci_dev *pdev,
pci_channel_state_t state)
pci_ers_result_t vfio_pci_core_aer_err_detected(struct pci_dev *pdev,
pci_channel_state_t state)
{
struct vfio_pci_core_device *vdev;
struct vfio_device *device;
@ -1914,6 +1931,7 @@ static pci_ers_result_t vfio_pci_aer_err_detected(struct pci_dev *pdev,
return PCI_ERS_RESULT_CAN_RECOVER;
}
EXPORT_SYMBOL_GPL(vfio_pci_core_aer_err_detected);
int vfio_pci_core_sriov_configure(struct pci_dev *pdev, int nr_virtfn)
{
@ -1936,7 +1954,7 @@ int vfio_pci_core_sriov_configure(struct pci_dev *pdev, int nr_virtfn)
EXPORT_SYMBOL_GPL(vfio_pci_core_sriov_configure);
const struct pci_error_handlers vfio_pci_core_err_handlers = {
.error_detected = vfio_pci_aer_err_detected,
.error_detected = vfio_pci_core_aer_err_detected,
};
EXPORT_SYMBOL_GPL(vfio_pci_core_err_handlers);
@ -2055,6 +2073,18 @@ static int vfio_pci_dev_set_hot_reset(struct vfio_device_set *dev_set,
}
cur_mem = NULL;
/*
* The pci_reset_bus() will reset all the devices in the bus.
* The power state can be non-D0 for some of the devices in the bus.
* For these devices, the pci_reset_bus() will internally set
* the power state to D0 without vfio driver involvement.
* For the devices which have NoSoftRst-, the reset function can
* cause the PCI config space reset without restoring the original
* state (saved locally in 'vdev->pm_save').
*/
list_for_each_entry(cur, &dev_set->device_list, vdev.dev_set_list)
vfio_pci_set_power_state(cur, PCI_D0);
ret = pci_reset_bus(pdev);
err_undo:
@ -2108,6 +2138,18 @@ static bool vfio_pci_dev_set_try_reset(struct vfio_device_set *dev_set)
if (!pdev)
return false;
/*
* The pci_reset_bus() will reset all the devices in the bus.
* The power state can be non-D0 for some of the devices in the bus.
* For these devices, the pci_reset_bus() will internally set
* the power state to D0 without vfio driver involvement.
* For the devices which have NoSoftRst-, the reset function can
* cause the PCI config space reset without restoring the original
* state (saved locally in 'vdev->pm_save').
*/
list_for_each_entry(cur, &dev_set->device_list, vdev.dev_set_list)
vfio_pci_set_power_state(cur, PCI_D0);
ret = pci_reset_bus(pdev);
if (ret)
return false;

2
drivers/vfio/pci/vfio_pci_rdwr.c
View File

@ -288,6 +288,7 @@ out:
return done;
}
#ifdef CONFIG_VFIO_PCI_VGA
ssize_t vfio_pci_vga_rw(struct vfio_pci_core_device *vdev, char __user *buf,
size_t count, loff_t *ppos, bool iswrite)
{
@ -355,6 +356,7 @@ ssize_t vfio_pci_vga_rw(struct vfio_pci_core_device *vdev, char __user *buf,
return done;
}
#endif
static void vfio_pci_ioeventfd_do_write(struct vfio_pci_ioeventfd *ioeventfd,
bool test_mem)

296
drivers/vfio/vfio.c
View File

@ -1557,15 +1557,303 @@ static int vfio_device_fops_release(struct inode *inode, struct file *filep)
return 0;
}
/*
* vfio_mig_get_next_state - Compute the next step in the FSM
* @cur_fsm - The current state the device is in
* @new_fsm - The target state to reach
* @next_fsm - Pointer to the next step to get to new_fsm
*
* Return 0 upon success, otherwise -errno
* Upon success the next step in the state progression between cur_fsm and
* new_fsm will be set in next_fsm.
*
* This breaks down requests for combination transitions into smaller steps and
* returns the next step to get to new_fsm. The function may need to be called
* multiple times before reaching new_fsm.
*
*/
int vfio_mig_get_next_state(struct vfio_device *device,
enum vfio_device_mig_state cur_fsm,
enum vfio_device_mig_state new_fsm,
enum vfio_device_mig_state *next_fsm)
{
enum { VFIO_DEVICE_NUM_STATES = VFIO_DEVICE_STATE_RUNNING_P2P + 1 };
/*
* The coding in this table requires the driver to implement the
* following FSM arcs:
* RESUMING -> STOP
* STOP -> RESUMING
* STOP -> STOP_COPY
* STOP_COPY -> STOP
*
* If P2P is supported then the driver must also implement these FSM
* arcs:
* RUNNING -> RUNNING_P2P
* RUNNING_P2P -> RUNNING
* RUNNING_P2P -> STOP
* STOP -> RUNNING_P2P
* Without P2P the driver must implement:
* RUNNING -> STOP
* STOP -> RUNNING
*
* The coding will step through multiple states for some combination
* transitions; if all optional features are supported, this means the
* following ones:
* RESUMING -> STOP -> RUNNING_P2P
* RESUMING -> STOP -> RUNNING_P2P -> RUNNING
* RESUMING -> STOP -> STOP_COPY
* RUNNING -> RUNNING_P2P -> STOP
* RUNNING -> RUNNING_P2P -> STOP -> RESUMING
* RUNNING -> RUNNING_P2P -> STOP -> STOP_COPY
* RUNNING_P2P -> STOP -> RESUMING
* RUNNING_P2P -> STOP -> STOP_COPY
* STOP -> RUNNING_P2P -> RUNNING
* STOP_COPY -> STOP -> RESUMING
* STOP_COPY -> STOP -> RUNNING_P2P
* STOP_COPY -> STOP -> RUNNING_P2P -> RUNNING
*/
static const u8 vfio_from_fsm_table[VFIO_DEVICE_NUM_STATES][VFIO_DEVICE_NUM_STATES] = {
[VFIO_DEVICE_STATE_STOP] = {
[VFIO_DEVICE_STATE_STOP] = VFIO_DEVICE_STATE_STOP,
[VFIO_DEVICE_STATE_RUNNING] = VFIO_DEVICE_STATE_RUNNING_P2P,
[VFIO_DEVICE_STATE_STOP_COPY] = VFIO_DEVICE_STATE_STOP_COPY,
[VFIO_DEVICE_STATE_RESUMING] = VFIO_DEVICE_STATE_RESUMING,
[VFIO_DEVICE_STATE_RUNNING_P2P] = VFIO_DEVICE_STATE_RUNNING_P2P,
[VFIO_DEVICE_STATE_ERROR] = VFIO_DEVICE_STATE_ERROR,
},
[VFIO_DEVICE_STATE_RUNNING] = {
[VFIO_DEVICE_STATE_STOP] = VFIO_DEVICE_STATE_RUNNING_P2P,
[VFIO_DEVICE_STATE_RUNNING] = VFIO_DEVICE_STATE_RUNNING,
[VFIO_DEVICE_STATE_STOP_COPY] = VFIO_DEVICE_STATE_RUNNING_P2P,
[VFIO_DEVICE_STATE_RESUMING] = VFIO_DEVICE_STATE_RUNNING_P2P,
[VFIO_DEVICE_STATE_RUNNING_P2P] = VFIO_DEVICE_STATE_RUNNING_P2P,
[VFIO_DEVICE_STATE_ERROR] = VFIO_DEVICE_STATE_ERROR,
},
[VFIO_DEVICE_STATE_STOP_COPY] = {
[VFIO_DEVICE_STATE_STOP] = VFIO_DEVICE_STATE_STOP,
[VFIO_DEVICE_STATE_RUNNING] = VFIO_DEVICE_STATE_STOP,
[VFIO_DEVICE_STATE_STOP_COPY] = VFIO_DEVICE_STATE_STOP_COPY,
[VFIO_DEVICE_STATE_RESUMING] = VFIO_DEVICE_STATE_STOP,
[VFIO_DEVICE_STATE_RUNNING_P2P] = VFIO_DEVICE_STATE_STOP,
[VFIO_DEVICE_STATE_ERROR] = VFIO_DEVICE_STATE_ERROR,
},
[VFIO_DEVICE_STATE_RESUMING] = {
[VFIO_DEVICE_STATE_STOP] = VFIO_DEVICE_STATE_STOP,
[VFIO_DEVICE_STATE_RUNNING] = VFIO_DEVICE_STATE_STOP,
[VFIO_DEVICE_STATE_STOP_COPY] = VFIO_DEVICE_STATE_STOP,
[VFIO_DEVICE_STATE_RESUMING] = VFIO_DEVICE_STATE_RESUMING,
[VFIO_DEVICE_STATE_RUNNING_P2P] = VFIO_DEVICE_STATE_STOP,
[VFIO_DEVICE_STATE_ERROR] = VFIO_DEVICE_STATE_ERROR,
},
[VFIO_DEVICE_STATE_RUNNING_P2P] = {
[VFIO_DEVICE_STATE_STOP] = VFIO_DEVICE_STATE_STOP,
[VFIO_DEVICE_STATE_RUNNING] = VFIO_DEVICE_STATE_RUNNING,
[VFIO_DEVICE_STATE_STOP_COPY] = VFIO_DEVICE_STATE_STOP,
[VFIO_DEVICE_STATE_RESUMING] = VFIO_DEVICE_STATE_STOP,
[VFIO_DEVICE_STATE_RUNNING_P2P] = VFIO_DEVICE_STATE_RUNNING_P2P,
[VFIO_DEVICE_STATE_ERROR] = VFIO_DEVICE_STATE_ERROR,
},
[VFIO_DEVICE_STATE_ERROR] = {
[VFIO_DEVICE_STATE_STOP] = VFIO_DEVICE_STATE_ERROR,
[VFIO_DEVICE_STATE_RUNNING] = VFIO_DEVICE_STATE_ERROR,
[VFIO_DEVICE_STATE_STOP_COPY] = VFIO_DEVICE_STATE_ERROR,
[VFIO_DEVICE_STATE_RESUMING] = VFIO_DEVICE_STATE_ERROR,
[VFIO_DEVICE_STATE_RUNNING_P2P] = VFIO_DEVICE_STATE_ERROR,
[VFIO_DEVICE_STATE_ERROR] = VFIO_DEVICE_STATE_ERROR,
},
};
static const unsigned int state_flags_table[VFIO_DEVICE_NUM_STATES] = {
[VFIO_DEVICE_STATE_STOP] = VFIO_MIGRATION_STOP_COPY,
[VFIO_DEVICE_STATE_RUNNING] = VFIO_MIGRATION_STOP_COPY,
[VFIO_DEVICE_STATE_STOP_COPY] = VFIO_MIGRATION_STOP_COPY,
[VFIO_DEVICE_STATE_RESUMING] = VFIO_MIGRATION_STOP_COPY,
[VFIO_DEVICE_STATE_RUNNING_P2P] =
VFIO_MIGRATION_STOP_COPY | VFIO_MIGRATION_P2P,
[VFIO_DEVICE_STATE_ERROR] = ~0U,
};
if (WARN_ON(cur_fsm >= ARRAY_SIZE(vfio_from_fsm_table) ||
(state_flags_table[cur_fsm] & device->migration_flags) !=
state_flags_table[cur_fsm]))
return -EINVAL;
if (new_fsm >= ARRAY_SIZE(vfio_from_fsm_table) ||
(state_flags_table[new_fsm] & device->migration_flags) !=
state_flags_table[new_fsm])
return -EINVAL;
/*
* Arcs touching optional and unsupported states are skipped over. The
* driver will instead see an arc from the original state to the next
* logical state, as per the above comment.
*/
*next_fsm = vfio_from_fsm_table[cur_fsm][new_fsm];
while ((state_flags_table[*next_fsm] & device->migration_flags) !=
state_flags_table[*next_fsm])
*next_fsm = vfio_from_fsm_table[*next_fsm][new_fsm];
return (*next_fsm != VFIO_DEVICE_STATE_ERROR) ? 0 : -EINVAL;
}
EXPORT_SYMBOL_GPL(vfio_mig_get_next_state);
/*
* Convert the drivers's struct file into a FD number and return it to userspace
*/
static int vfio_ioct_mig_return_fd(struct file *filp, void __user *arg,
struct vfio_device_feature_mig_state *mig)
{
int ret;
int fd;
fd = get_unused_fd_flags(O_CLOEXEC);
if (fd < 0) {
ret = fd;
goto out_fput;
}
mig->data_fd = fd;
if (copy_to_user(arg, mig, sizeof(*mig))) {
ret = -EFAULT;
goto out_put_unused;
}
fd_install(fd, filp);
return 0;
out_put_unused:
put_unused_fd(fd);
out_fput:
fput(filp);
return ret;
}
static int
vfio_ioctl_device_feature_mig_device_state(struct vfio_device *device,
u32 flags, void __user *arg,
size_t argsz)
{
size_t minsz =
offsetofend(struct vfio_device_feature_mig_state, data_fd);
struct vfio_device_feature_mig_state mig;
struct file *filp = NULL;
int ret;
if (!device->ops->migration_set_state ||
!device->ops->migration_get_state)
return -ENOTTY;
ret = vfio_check_feature(flags, argsz,
VFIO_DEVICE_FEATURE_SET |
VFIO_DEVICE_FEATURE_GET,
sizeof(mig));
if (ret != 1)
return ret;
if (copy_from_user(&mig, arg, minsz))
return -EFAULT;
if (flags & VFIO_DEVICE_FEATURE_GET) {
enum vfio_device_mig_state curr_state;
ret = device->ops->migration_get_state(device, &curr_state);
if (ret)
return ret;
mig.device_state = curr_state;
goto out_copy;
}
/* Handle the VFIO_DEVICE_FEATURE_SET */
filp = device->ops->migration_set_state(device, mig.device_state);
if (IS_ERR(filp) || !filp)
goto out_copy;
return vfio_ioct_mig_return_fd(filp, arg, &mig);
out_copy:
mig.data_fd = -1;
if (copy_to_user(arg, &mig, sizeof(mig)))
return -EFAULT;
if (IS_ERR(filp))
return PTR_ERR(filp);
return 0;
}
static int vfio_ioctl_device_feature_migration(struct vfio_device *device,
u32 flags, void __user *arg,
size_t argsz)
{
struct vfio_device_feature_migration mig = {
.flags = device->migration_flags,
};
int ret;
if (!device->ops->migration_set_state ||
!device->ops->migration_get_state)
return -ENOTTY;
ret = vfio_check_feature(flags, argsz, VFIO_DEVICE_FEATURE_GET,
sizeof(mig));
if (ret != 1)
return ret;
if (copy_to_user(arg, &mig, sizeof(mig)))
return -EFAULT;
return 0;
}
static int vfio_ioctl_device_feature(struct vfio_device *device,
struct vfio_device_feature __user *arg)
{
size_t minsz = offsetofend(struct vfio_device_feature, flags);
struct vfio_device_feature feature;
if (copy_from_user(&feature, arg, minsz))
return -EFAULT;
if (feature.argsz < minsz)
return -EINVAL;
/* Check unknown flags */
if (feature.flags &
~(VFIO_DEVICE_FEATURE_MASK | VFIO_DEVICE_FEATURE_SET |
VFIO_DEVICE_FEATURE_GET | VFIO_DEVICE_FEATURE_PROBE))
return -EINVAL;
/* GET & SET are mutually exclusive except with PROBE */
if (!(feature.flags & VFIO_DEVICE_FEATURE_PROBE) &&
(feature.flags & VFIO_DEVICE_FEATURE_SET) &&
(feature.flags & VFIO_DEVICE_FEATURE_GET))
return -EINVAL;
switch (feature.flags & VFIO_DEVICE_FEATURE_MASK) {
case VFIO_DEVICE_FEATURE_MIGRATION:
return vfio_ioctl_device_feature_migration(
device, feature.flags, arg->data,
feature.argsz - minsz);
case VFIO_DEVICE_FEATURE_MIG_DEVICE_STATE:
return vfio_ioctl_device_feature_mig_device_state(
device, feature.flags, arg->data,
feature.argsz - minsz);
default:
if (unlikely(!device->ops->device_feature))
return -EINVAL;
return device->ops->device_feature(device, feature.flags,
arg->data,
feature.argsz - minsz);
}
}
static long vfio_device_fops_unl_ioctl(struct file *filep,
unsigned int cmd, unsigned long arg)
{
struct vfio_device *device = filep->private_data;
if (unlikely(!device->ops->ioctl))
return -EINVAL;
return device->ops->ioctl(device, cmd, arg);
switch (cmd) {
case VFIO_DEVICE_FEATURE:
return vfio_ioctl_device_feature(device, (void __user *)arg);
default:
if (unlikely(!device->ops->ioctl))
return -EINVAL;
return device->ops->ioctl(device, cmd, arg);
}
}
static ssize_t vfio_device_fops_read(struct file *filep, char __user *buf,

49
drivers/crypto/hisilicon/qm.h → include/linux/hisi_acc_qm.h
View File

@ -34,6 +34,41 @@
#define QM_WUSER_M_CFG_ENABLE 0x1000a8
#define WUSER_M_CFG_ENABLE 0xffffffff
/* mailbox */
#define QM_MB_CMD_SQC 0x0
#define QM_MB_CMD_CQC 0x1
#define QM_MB_CMD_EQC 0x2
#define QM_MB_CMD_AEQC 0x3
#define QM_MB_CMD_SQC_BT 0x4
#define QM_MB_CMD_CQC_BT 0x5
#define QM_MB_CMD_SQC_VFT_V2 0x6
#define QM_MB_CMD_STOP_QP 0x8
#define QM_MB_CMD_SRC 0xc
#define QM_MB_CMD_DST 0xd
#define QM_MB_CMD_SEND_BASE 0x300
#define QM_MB_EVENT_SHIFT 8
#define QM_MB_BUSY_SHIFT 13
#define QM_MB_OP_SHIFT 14
#define QM_MB_CMD_DATA_ADDR_L 0x304
#define QM_MB_CMD_DATA_ADDR_H 0x308
#define QM_MB_MAX_WAIT_CNT 6000
/* doorbell */
#define QM_DOORBELL_CMD_SQ 0
#define QM_DOORBELL_CMD_CQ 1
#define QM_DOORBELL_CMD_EQ 2
#define QM_DOORBELL_CMD_AEQ 3
#define QM_DOORBELL_SQ_CQ_BASE_V2 0x1000
#define QM_DOORBELL_EQ_AEQ_BASE_V2 0x2000
#define QM_QP_MAX_NUM_SHIFT 11
#define QM_DB_CMD_SHIFT_V2 12
#define QM_DB_RAND_SHIFT_V2 16
#define QM_DB_INDEX_SHIFT_V2 32
#define QM_DB_PRIORITY_SHIFT_V2 48
#define QM_VF_STATE 0x60
/* qm cache */
#define QM_CACHE_CTL 0x100050
#define SQC_CACHE_ENABLE BIT(0)
@ -128,6 +163,11 @@ enum qm_debug_file {
DEBUG_FILE_NUM,
};
enum qm_vf_state {
QM_READY = 0,
QM_NOT_READY,
};
struct qm_dfx {
atomic64_t err_irq_cnt;
atomic64_t aeq_irq_cnt;
@ -414,6 +454,10 @@ pci_ers_result_t hisi_qm_dev_slot_reset(struct pci_dev *pdev);
void hisi_qm_reset_prepare(struct pci_dev *pdev);
void hisi_qm_reset_done(struct pci_dev *pdev);
int hisi_qm_wait_mb_ready(struct hisi_qm *qm);
int hisi_qm_mb(struct hisi_qm *qm, u8 cmd, dma_addr_t dma_addr, u16 queue,
bool op);
struct hisi_acc_sgl_pool;
struct hisi_acc_hw_sgl *hisi_acc_sg_buf_map_to_hw_sgl(struct device *dev,
struct scatterlist *sgl, struct hisi_acc_sgl_pool *pool,
@ -438,4 +482,9 @@ void hisi_qm_pm_init(struct hisi_qm *qm);
int hisi_qm_get_dfx_access(struct hisi_qm *qm);
void hisi_qm_put_dfx_access(struct hisi_qm *qm);
void hisi_qm_regs_dump(struct seq_file *s, struct debugfs_regset32 *regset);
/* Used by VFIO ACC live migration driver */
struct pci_driver *hisi_sec_get_pf_driver(void);
struct pci_driver *hisi_hpre_get_pf_driver(void);
struct pci_driver *hisi_zip_get_pf_driver(void);
#endif

3
include/linux/mlx5/driver.h
View File

@ -1143,6 +1143,9 @@ int mlx5_dm_sw_icm_alloc(struct mlx5_core_dev *dev, enum mlx5_sw_icm_type type,
int mlx5_dm_sw_icm_dealloc(struct mlx5_core_dev *dev, enum mlx5_sw_icm_type type,
u64 length, u16 uid, phys_addr_t addr, u32 obj_id);
struct mlx5_core_dev *mlx5_vf_get_core_dev(struct pci_dev *pdev);
void mlx5_vf_put_core_dev(struct mlx5_core_dev *mdev);
#ifdef CONFIG_MLX5_CORE_IPOIB
struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
struct ib_device *ibdev,

147
include/linux/mlx5/mlx5_ifc.h
View File

@ -127,6 +127,11 @@ enum {
MLX5_CMD_OP_QUERY_SF_PARTITION = 0x111,
MLX5_CMD_OP_ALLOC_SF = 0x113,
MLX5_CMD_OP_DEALLOC_SF = 0x114,
MLX5_CMD_OP_SUSPEND_VHCA = 0x115,
MLX5_CMD_OP_RESUME_VHCA = 0x116,
MLX5_CMD_OP_QUERY_VHCA_MIGRATION_STATE = 0x117,
MLX5_CMD_OP_SAVE_VHCA_STATE = 0x118,
MLX5_CMD_OP_LOAD_VHCA_STATE = 0x119,
MLX5_CMD_OP_CREATE_MKEY = 0x200,
MLX5_CMD_OP_QUERY_MKEY = 0x201,
MLX5_CMD_OP_DESTROY_MKEY = 0x202,
@ -1757,7 +1762,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
u8 reserved_at_682[0x1];
u8 log_max_sf[0x5];
u8 apu[0x1];
u8 reserved_at_689[0x7];
u8 reserved_at_689[0x4];
u8 migration[0x1];
u8 reserved_at_68e[0x2];
u8 log_min_sf_size[0x8];
u8 max_num_sf_partitions[0x8];
@ -11518,4 +11525,142 @@ enum {
MLX5_MTT_PERM_RW = MLX5_MTT_PERM_READ | MLX5_MTT_PERM_WRITE,
};
enum {
MLX5_SUSPEND_VHCA_IN_OP_MOD_SUSPEND_INITIATOR = 0x0,
MLX5_SUSPEND_VHCA_IN_OP_MOD_SUSPEND_RESPONDER = 0x1,
};
struct mlx5_ifc_suspend_vhca_in_bits {
u8 opcode[0x10];
u8 uid[0x10];
u8 reserved_at_20[0x10];
u8 op_mod[0x10];
u8 reserved_at_40[0x10];
u8 vhca_id[0x10];
u8 reserved_at_60[0x20];
};
struct mlx5_ifc_suspend_vhca_out_bits {
u8 status[0x8];
u8 reserved_at_8[0x18];
u8 syndrome[0x20];
u8 reserved_at_40[0x40];
};
enum {
MLX5_RESUME_VHCA_IN_OP_MOD_RESUME_RESPONDER = 0x0,
MLX5_RESUME_VHCA_IN_OP_MOD_RESUME_INITIATOR = 0x1,
};
struct mlx5_ifc_resume_vhca_in_bits {
u8 opcode[0x10];
u8 uid[0x10];
u8 reserved_at_20[0x10];
u8 op_mod[0x10];
u8 reserved_at_40[0x10];
u8 vhca_id[0x10];
u8 reserved_at_60[0x20];
};
struct mlx5_ifc_resume_vhca_out_bits {
u8 status[0x8];
u8 reserved_at_8[0x18];
u8 syndrome[0x20];
u8 reserved_at_40[0x40];
};
struct mlx5_ifc_query_vhca_migration_state_in_bits {
u8 opcode[0x10];
u8 uid[0x10];
u8 reserved_at_20[0x10];
u8 op_mod[0x10];
u8 reserved_at_40[0x10];
u8 vhca_id[0x10];
u8 reserved_at_60[0x20];
};
struct mlx5_ifc_query_vhca_migration_state_out_bits {
u8 status[0x8];
u8 reserved_at_8[0x18];
u8 syndrome[0x20];
u8 reserved_at_40[0x40];
u8 required_umem_size[0x20];
u8 reserved_at_a0[0x160];
};
struct mlx5_ifc_save_vhca_state_in_bits {
u8 opcode[0x10];
u8 uid[0x10];
u8 reserved_at_20[0x10];
u8 op_mod[0x10];
u8 reserved_at_40[0x10];
u8 vhca_id[0x10];
u8 reserved_at_60[0x20];
u8 va[0x40];
u8 mkey[0x20];
u8 size[0x20];
};
struct mlx5_ifc_save_vhca_state_out_bits {
u8 status[0x8];
u8 reserved_at_8[0x18];
u8 syndrome[0x20];
u8 actual_image_size[0x20];
u8 reserved_at_60[0x20];
};
struct mlx5_ifc_load_vhca_state_in_bits {
u8 opcode[0x10];
u8 uid[0x10];
u8 reserved_at_20[0x10];
u8 op_mod[0x10];
u8 reserved_at_40[0x10];
u8 vhca_id[0x10];
u8 reserved_at_60[0x20];
u8 va[0x40];
u8 mkey[0x20];
u8 size[0x20];
};
struct mlx5_ifc_load_vhca_state_out_bits {
u8 status[0x8];
u8 reserved_at_8[0x18];
u8 syndrome[0x20];
u8 reserved_at_40[0x40];
};
#endif /* MLX5_IFC_H */

15
include/linux/pci.h
View File

@ -2166,7 +2166,8 @@ void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
#ifdef CONFIG_PCI_IOV
int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
int pci_iov_vf_id(struct pci_dev *dev);
void *pci_iov_get_pf_drvdata(struct pci_dev *dev, struct pci_driver *pf_driver);
int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
void pci_disable_sriov(struct pci_dev *dev);
@ -2194,6 +2195,18 @@ static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
{
return -ENOSYS;
}
static inline int pci_iov_vf_id(struct pci_dev *dev)
{
return -ENOSYS;
}
static inline void *pci_iov_get_pf_drvdata(struct pci_dev *dev,
struct pci_driver *pf_driver)
{
return ERR_PTR(-EINVAL);
}
static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
{ return -ENODEV; }

3
include/linux/pci_ids.h
View File

@ -2529,6 +2529,9 @@
#define PCI_DEVICE_ID_KORENIX_JETCARDF3 0x17ff
#define PCI_VENDOR_ID_HUAWEI 0x19e5
#define PCI_DEVICE_ID_HUAWEI_ZIP_VF 0xa251
#define PCI_DEVICE_ID_HUAWEI_SEC_VF 0xa256
#define PCI_DEVICE_ID_HUAWEI_HPRE_VF 0xa259
#define PCI_VENDOR_ID_NETRONOME 0x19ee
#define PCI_DEVICE_ID_NETRONOME_NFP4000 0x4000

53
include/linux/vfio.h
View File

@ -33,6 +33,7 @@ struct vfio_device {
struct vfio_group *group;
struct vfio_device_set *dev_set;
struct list_head dev_set_list;
unsigned int migration_flags;
/* Members below here are private, not for driver use */
refcount_t refcount;
@ -55,6 +56,17 @@ struct vfio_device {
* @match: Optional device name match callback (return: 0 for no-match, >0 for
* match, -errno for abort (ex. match with insufficient or incorrect
* additional args)
* @device_feature: Optional, fill in the VFIO_DEVICE_FEATURE ioctl
* @migration_set_state: Optional callback to change the migration state for
* devices that support migration. It's mandatory for
* VFIO_DEVICE_FEATURE_MIGRATION migration support.
* The returned FD is used for data transfer according to the FSM
* definition. The driver is responsible to ensure that FD reaches end
* of stream or error whenever the migration FSM leaves a data transfer
* state or before close_device() returns.
* @migration_get_state: Optional callback to get the migration state for
* devices that support migration. It's mandatory for
* VFIO_DEVICE_FEATURE_MIGRATION migration support.
*/
struct vfio_device_ops {
char *name;
@ -69,8 +81,44 @@ struct vfio_device_ops {
int (*mmap)(struct vfio_device *vdev, struct vm_area_struct *vma);
void (*request)(struct vfio_device *vdev, unsigned int count);
int (*match)(struct vfio_device *vdev, char *buf);
int (*device_feature)(struct vfio_device *device, u32 flags,
void __user *arg, size_t argsz);
struct file *(*migration_set_state)(
struct vfio_device *device,
enum vfio_device_mig_state new_state);
int (*migration_get_state)(struct vfio_device *device,
enum vfio_device_mig_state *curr_state);
};
/**
* vfio_check_feature - Validate user input for the VFIO_DEVICE_FEATURE ioctl
* @flags: Arg from the device_feature op
* @argsz: Arg from the device_feature op
* @supported_ops: Combination of VFIO_DEVICE_FEATURE_GET and SET the driver
* supports
* @minsz: Minimum data size the driver accepts
*
* For use in a driver's device_feature op. Checks that the inputs to the
* VFIO_DEVICE_FEATURE ioctl are correct for the driver's feature. Returns 1 if
* the driver should execute the get or set, otherwise the relevant
* value should be returned.
*/
static inline int vfio_check_feature(u32 flags, size_t argsz, u32 supported_ops,
size_t minsz)
{
if ((flags & (VFIO_DEVICE_FEATURE_GET | VFIO_DEVICE_FEATURE_SET)) &
~supported_ops)
return -EINVAL;
if (flags & VFIO_DEVICE_FEATURE_PROBE)
return 0;
/* Without PROBE one of GET or SET must be requested */
if (!(flags & (VFIO_DEVICE_FEATURE_GET | VFIO_DEVICE_FEATURE_SET)))
return -EINVAL;
if (argsz < minsz)
return -EINVAL;
return 1;
}
void vfio_init_group_dev(struct vfio_device *device, struct device *dev,
const struct vfio_device_ops *ops);
void vfio_uninit_group_dev(struct vfio_device *device);
@ -82,6 +130,11 @@ extern void vfio_device_put(struct vfio_device *device);
int vfio_assign_device_set(struct vfio_device *device, void *set_id);
int vfio_mig_get_next_state(struct vfio_device *device,
enum vfio_device_mig_state cur_fsm,
enum vfio_device_mig_state new_fsm,
enum vfio_device_mig_state *next_fsm);
/*
* External user API
*/

13
include/linux/vfio_pci_core.h
View File

@ -159,8 +159,17 @@ extern ssize_t vfio_pci_config_rw(struct vfio_pci_core_device *vdev,
extern ssize_t vfio_pci_bar_rw(struct vfio_pci_core_device *vdev, char __user *buf,
size_t count, loff_t *ppos, bool iswrite);
#ifdef CONFIG_VFIO_PCI_VGA
extern ssize_t vfio_pci_vga_rw(struct vfio_pci_core_device *vdev, char __user *buf,
size_t count, loff_t *ppos, bool iswrite);
#else
static inline ssize_t vfio_pci_vga_rw(struct vfio_pci_core_device *vdev,
char __user *buf, size_t count,
loff_t *ppos, bool iswrite)
{
return -EINVAL;
}
#endif
extern long vfio_pci_ioeventfd(struct vfio_pci_core_device *vdev, loff_t offset,
uint64_t data, int count, int fd);
@ -220,6 +229,8 @@ int vfio_pci_core_sriov_configure(struct pci_dev *pdev, int nr_virtfn);
extern const struct pci_error_handlers vfio_pci_core_err_handlers;
long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd,
unsigned long arg);
int vfio_pci_core_ioctl_feature(struct vfio_device *device, u32 flags,
void __user *arg, size_t argsz);
ssize_t vfio_pci_core_read(struct vfio_device *core_vdev, char __user *buf,
size_t count, loff_t *ppos);
ssize_t vfio_pci_core_write(struct vfio_device *core_vdev, const char __user *buf,
@ -230,6 +241,8 @@ int vfio_pci_core_match(struct vfio_device *core_vdev, char *buf);
int vfio_pci_core_enable(struct vfio_pci_core_device *vdev);
void vfio_pci_core_disable(struct vfio_pci_core_device *vdev);
void vfio_pci_core_finish_enable(struct vfio_pci_core_device *vdev);
pci_ers_result_t vfio_pci_core_aer_err_detected(struct pci_dev *pdev,
pci_channel_state_t state);
static inline bool vfio_pci_is_vga(struct pci_dev *pdev)
{

406
include/uapi/linux/vfio.h
View File

@ -323,7 +323,7 @@ struct vfio_region_info_cap_type {
#define VFIO_REGION_TYPE_PCI_VENDOR_MASK (0xffff)
#define VFIO_REGION_TYPE_GFX (1)
#define VFIO_REGION_TYPE_CCW (2)
#define VFIO_REGION_TYPE_MIGRATION (3)
#define VFIO_REGION_TYPE_MIGRATION_DEPRECATED (3)
/* sub-types for VFIO_REGION_TYPE_PCI_* */
@ -405,225 +405,29 @@ struct vfio_region_gfx_edid {
#define VFIO_REGION_SUBTYPE_CCW_CRW (3)
/* sub-types for VFIO_REGION_TYPE_MIGRATION */
#define VFIO_REGION_SUBTYPE_MIGRATION (1)
/*
* The structure vfio_device_migration_info is placed at the 0th offset of
* the VFIO_REGION_SUBTYPE_MIGRATION region to get and set VFIO device related
* migration information. Field accesses from this structure are only supported
* at their native width and alignment. Otherwise, the result is undefined and
* vendor drivers should return an error.
*
* device_state: (read/write)
* - The user application writes to this field to inform the vendor driver
* about the device state to be transitioned to.
* - The vendor driver should take the necessary actions to change the
* device state. After successful transition to a given state, the
* vendor driver should return success on write(device_state, state)
* system call. If the device state transition fails, the vendor driver
* should return an appropriate -errno for the fault condition.
* - On the user application side, if the device state transition fails,
* that is, if write(device_state, state) returns an error, read
* device_state again to determine the current state of the device from
* the vendor driver.
* - The vendor driver should return previous state of the device unless
* the vendor driver has encountered an internal error, in which case
* the vendor driver may report the device_state VFIO_DEVICE_STATE_ERROR.
* - The user application must use the device reset ioctl to recover the
* device from VFIO_DEVICE_STATE_ERROR state. If the device is
* indicated to be in a valid device state by reading device_state, the
* user application may attempt to transition the device to any valid
* state reachable from the current state or terminate itself.
*
* device_state consists of 3 bits:
* - If bit 0 is set, it indicates the _RUNNING state. If bit 0 is clear,
* it indicates the _STOP state. When the device state is changed to
* _STOP, driver should stop the device before write() returns.
* - If bit 1 is set, it indicates the _SAVING state, which means that the
* driver should start gathering device state information that will be
* provided to the VFIO user application to save the device's state.
* - If bit 2 is set, it indicates the _RESUMING state, which means that
* the driver should prepare to resume the device. Data provided through
* the migration region should be used to resume the device.
* Bits 3 - 31 are reserved for future use. To preserve them, the user
* application should perform a read-modify-write operation on this
* field when modifying the specified bits.
*
* +------- _RESUMING
* |+------ _SAVING
* ||+----- _RUNNING
* |||
* 000b => Device Stopped, not saving or resuming
* 001b => Device running, which is the default state
* 010b => Stop the device & save the device state, stop-and-copy state
* 011b => Device running and save the device state, pre-copy state
* 100b => Device stopped and the device state is resuming
* 101b => Invalid state
* 110b => Error state
* 111b => Invalid state
*
* State transitions:
*
* _RESUMING _RUNNING Pre-copy Stop-and-copy _STOP
* (100b) (001b) (011b) (010b) (000b)
* 0. Running or default state
* |
*
* 1. Normal Shutdown (optional)
* |------------------------------------->|
*
* 2. Save the state or suspend
* |------------------------->|---------->|
*
* 3. Save the state during live migration
* |----------->|------------>|---------->|
*
* 4. Resuming
* |<---------|
*
* 5. Resumed
* |--------->|
*
* 0. Default state of VFIO device is _RUNNING when the user application starts.
* 1. During normal shutdown of the user application, the user application may
* optionally change the VFIO device state from _RUNNING to _STOP. This
* transition is optional. The vendor driver must support this transition but
* must not require it.
* 2. When the user application saves state or suspends the application, the
* device state transitions from _RUNNING to stop-and-copy and then to _STOP.
* On state transition from _RUNNING to stop-and-copy, driver must stop the
* device, save the device state and send it to the application through the
* migration region. The sequence to be followed for such transition is given
* below.
* 3. In live migration of user application, the state transitions from _RUNNING
* to pre-copy, to stop-and-copy, and to _STOP.
* On state transition from _RUNNING to pre-copy, the driver should start
* gathering the device state while the application is still running and send
* the device state data to application through the migration region.
* On state transition from pre-copy to stop-and-copy, the driver must stop
* the device, save the device state and send it to the user application
* through the migration region.
* Vendor drivers must support the pre-copy state even for implementations
* where no data is provided to the user before the stop-and-copy state. The
* user must not be required to consume all migration data before the device
* transitions to a new state, including the stop-and-copy state.
* The sequence to be followed for above two transitions is given below.
* 4. To start the resuming phase, the device state should be transitioned from
* the _RUNNING to the _RESUMING state.
* In the _RESUMING state, the driver should use the device state data
* received through the migration region to resume the device.
* 5. After providing saved device data to the driver, the application should
* change the state from _RESUMING to _RUNNING.
*
* reserved:
* Reads on this field return zero and writes are ignored.
*
* pending_bytes: (read only)
* The number of pending bytes still to be migrated from the vendor driver.
*
* data_offset: (read only)
* The user application should read data_offset field from the migration
* region. The user application should read the device data from this
* offset within the migration region during the _SAVING state or write
* the device data during the _RESUMING state. See below for details of
* sequence to be followed.
*
* data_size: (read/write)
* The user application should read data_size to get the size in bytes of
* the data copied in the migration region during the _SAVING state and
* write the size in bytes of the data copied in the migration region
* during the _RESUMING state.
*
* The format of the migration region is as follows:
* ------------------------------------------------------------------
* |vfio_device_migration_info| data section |
* | | /////////////////////////////// |
* ------------------------------------------------------------------
* ^ ^
* offset 0-trapped part data_offset
*
* The structure vfio_device_migration_info is always followed by the data
* section in the region, so data_offset will always be nonzero. The offset
* from where the data is copied is decided by the kernel driver. The data
* section can be trapped, mmapped, or partitioned, depending on how the kernel
* driver defines the data section. The data section partition can be defined
* as mapped by the sparse mmap capability. If mmapped, data_offset must be
* page aligned, whereas initial section which contains the
* vfio_device_migration_info structure, might not end at the offset, which is
* page aligned. The user is not required to access through mmap regardless
* of the capabilities of the region mmap.
* The vendor driver should determine whether and how to partition the data
* section. The vendor driver should return data_offset accordingly.
*
* The sequence to be followed while in pre-copy state and stop-and-copy state
* is as follows:
* a. Read pending_bytes, indicating the start of a new iteration to get device
* data. Repeated read on pending_bytes at this stage should have no side
* effects.
* If pending_bytes == 0, the user application should not iterate to get data
* for that device.
* If pending_bytes > 0, perform the following steps.
* b. Read data_offset, indicating that the vendor driver should make data
* available through the data section. The vendor driver should return this
* read operation only after data is available from (region + data_offset)
* to (region + data_offset + data_size).
* c. Read data_size, which is the amount of data in bytes available through
* the migration region.
* Read on data_offset and data_size should return the offset and size of
* the current buffer if the user application reads data_offset and
* data_size more than once here.
* d. Read data_size bytes of data from (region + data_offset) from the
* migration region.
* e. Process the data.
* f. Read pending_bytes, which indicates that the data from the previous
* iteration has been read. If pending_bytes > 0, go to step b.
*
* The user application can transition from the _SAVING|_RUNNING
* (pre-copy state) to the _SAVING (stop-and-copy) state regardless of the
* number of pending bytes. The user application should iterate in _SAVING
* (stop-and-copy) until pending_bytes is 0.
*
* The sequence to be followed while _RESUMING device state is as follows:
* While data for this device is available, repeat the following steps:
* a. Read data_offset from where the user application should write data.
* b. Write migration data starting at the migration region + data_offset for
* the length determined by data_size from the migration source.
* c. Write data_size, which indicates to the vendor driver that data is
* written in the migration region. Vendor driver must return this write
* operations on consuming data. Vendor driver should apply the
* user-provided migration region data to the device resume state.
*
* If an error occurs during the above sequences, the vendor driver can return
* an error code for next read() or write() operation, which will terminate the
* loop. The user application should then take the next necessary action, for
* example, failing migration or terminating the user application.
*
* For the user application, data is opaque. The user application should write
* data in the same order as the data is received and the data should be of
* same transaction size at the source.
*/
#define VFIO_REGION_SUBTYPE_MIGRATION_DEPRECATED (1)
struct vfio_device_migration_info {
__u32 device_state; /* VFIO device state */
#define VFIO_DEVICE_STATE_STOP (0)
#define VFIO_DEVICE_STATE_RUNNING (1 << 0)
#define VFIO_DEVICE_STATE_SAVING (1 << 1)
#define VFIO_DEVICE_STATE_RESUMING (1 << 2)
#define VFIO_DEVICE_STATE_MASK (VFIO_DEVICE_STATE_RUNNING | \
VFIO_DEVICE_STATE_SAVING | \
VFIO_DEVICE_STATE_RESUMING)
#define VFIO_DEVICE_STATE_V1_STOP (0)
#define VFIO_DEVICE_STATE_V1_RUNNING (1 << 0)
#define VFIO_DEVICE_STATE_V1_SAVING (1 << 1)
#define VFIO_DEVICE_STATE_V1_RESUMING (1 << 2)
#define VFIO_DEVICE_STATE_MASK (VFIO_DEVICE_STATE_V1_RUNNING | \
VFIO_DEVICE_STATE_V1_SAVING | \
VFIO_DEVICE_STATE_V1_RESUMING)
#define VFIO_DEVICE_STATE_VALID(state) \
(state & VFIO_DEVICE_STATE_RESUMING ? \
(state & VFIO_DEVICE_STATE_MASK) == VFIO_DEVICE_STATE_RESUMING : 1)
(state & VFIO_DEVICE_STATE_V1_RESUMING ? \
(state & VFIO_DEVICE_STATE_MASK) == VFIO_DEVICE_STATE_V1_RESUMING : 1)
#define VFIO_DEVICE_STATE_IS_ERROR(state) \
((state & VFIO_DEVICE_STATE_MASK) == (VFIO_DEVICE_STATE_SAVING | \
VFIO_DEVICE_STATE_RESUMING))
((state & VFIO_DEVICE_STATE_MASK) == (VFIO_DEVICE_STATE_V1_SAVING | \
VFIO_DEVICE_STATE_V1_RESUMING))
#define VFIO_DEVICE_STATE_SET_ERROR(state) \
((state & ~VFIO_DEVICE_STATE_MASK) | VFIO_DEVICE_SATE_SAVING | \
VFIO_DEVICE_STATE_RESUMING)
((state & ~VFIO_DEVICE_STATE_MASK) | VFIO_DEVICE_STATE_V1_SAVING | \
VFIO_DEVICE_STATE_V1_RESUMING)
__u32 reserved;
__u64 pending_bytes;
@ -1002,6 +806,186 @@ struct vfio_device_feature {
*/
#define VFIO_DEVICE_FEATURE_PCI_VF_TOKEN (0)
/*
* Indicates the device can support the migration API through
* VFIO_DEVICE_FEATURE_MIG_DEVICE_STATE. If this GET succeeds, the RUNNING and
* ERROR states are always supported. Support for additional states is
* indicated via the flags field; at least VFIO_MIGRATION_STOP_COPY must be
* set.
*
* VFIO_MIGRATION_STOP_COPY means that STOP, STOP_COPY and
* RESUMING are supported.
*
* VFIO_MIGRATION_STOP_COPY | VFIO_MIGRATION_P2P means that RUNNING_P2P
* is supported in addition to the STOP_COPY states.
*
* Other combinations of flags have behavior to be defined in the future.
*/
struct vfio_device_feature_migration {
__aligned_u64 flags;
#define VFIO_MIGRATION_STOP_COPY (1 << 0)
#define VFIO_MIGRATION_P2P (1 << 1)
};
#define VFIO_DEVICE_FEATURE_MIGRATION 1
/*
* Upon VFIO_DEVICE_FEATURE_SET, execute a migration state change on the VFIO
* device. The new state is supplied in device_state, see enum
* vfio_device_mig_state for details
*
* The kernel migration driver must fully transition the device to the new state
* value before the operation returns to the user.
*
* The kernel migration driver must not generate asynchronous device state
* transitions outside of manipulation by the user or the VFIO_DEVICE_RESET
* ioctl as described above.
*
* If this function fails then current device_state may be the original
* operating state or some other state along the combination transition path.
* The user can then decide if it should execute a VFIO_DEVICE_RESET, attempt
* to return to the original state, or attempt to return to some other state
* such as RUNNING or STOP.
*
* If the new_state starts a new data transfer session then the FD associated
* with that session is returned in data_fd. The user is responsible to close
* this FD when it is finished. The user must consider the migration data stream
* carried over the FD to be opaque and must preserve the byte order of the
* stream. The user is not required to preserve buffer segmentation when writing
* the data stream during the RESUMING operation.
*
* Upon VFIO_DEVICE_FEATURE_GET, get the current migration state of the VFIO
* device, data_fd will be -1.
*/
struct vfio_device_feature_mig_state {
__u32 device_state; /* From enum vfio_device_mig_state */
__s32 data_fd;
};
#define VFIO_DEVICE_FEATURE_MIG_DEVICE_STATE 2
/*
* The device migration Finite State Machine is described by the enum
* vfio_device_mig_state. Some of the FSM arcs will create a migration data
* transfer session by returning a FD, in this case the migration data will
* flow over the FD using read() and write() as discussed below.
*
* There are 5 states to support VFIO_MIGRATION_STOP_COPY:
* RUNNING - The device is running normally
* STOP - The device does not change the internal or external state
* STOP_COPY - The device internal state can be read out
* RESUMING - The device is stopped and is loading a new internal state
* ERROR - The device has failed and must be reset
*
* And 1 optional state to support VFIO_MIGRATION_P2P:
* RUNNING_P2P - RUNNING, except the device cannot do peer to peer DMA
*
* The FSM takes actions on the arcs between FSM states. The driver implements
* the following behavior for the FSM arcs:
*
* RUNNING_P2P -> STOP
* STOP_COPY -> STOP
* While in STOP the device must stop the operation of the device. The device
* must not generate interrupts, DMA, or any other change to external state.
* It must not change its internal state. When stopped the device and kernel
* migration driver must accept and respond to interaction to support external
* subsystems in the STOP state, for example PCI MSI-X and PCI config space.
* Failure by the user to restrict device access while in STOP must not result
* in error conditions outside the user context (ex. host system faults).
*
* The STOP_COPY arc will terminate a data transfer session.
*
* RESUMING -> STOP
* Leaving RESUMING terminates a data transfer session and indicates the
* device should complete processing of the data delivered by write(). The
* kernel migration driver should complete the incorporation of data written
* to the data transfer FD into the device internal state and perform
* final validity and consistency checking of the new device state. If the
* user provided data is found to be incomplete, inconsistent, or otherwise
* invalid, the migration driver must fail the SET_STATE ioctl and
* optionally go to the ERROR state as described below.
*
* While in STOP the device has the same behavior as other STOP states
* described above.
*
* To abort a RESUMING session the device must be reset.
*
* RUNNING_P2P -> RUNNING
* While in RUNNING the device is fully operational, the device may generate
* interrupts, DMA, respond to MMIO, all vfio device regions are functional,
* and the device may advance its internal state.
*
* RUNNING -> RUNNING_P2P
* STOP -> RUNNING_P2P
* While in RUNNING_P2P the device is partially running in the P2P quiescent
* state defined below.
*
* STOP -> STOP_COPY
* This arc begin the process of saving the device state and will return a
* new data_fd.
*
* While in the STOP_COPY state the device has the same behavior as STOP
* with the addition that the data transfers session continues to stream the
* migration state. End of stream on the FD indicates the entire device
* state has been transferred.
*
* The user should take steps to restrict access to vfio device regions while
* the device is in STOP_COPY or risk corruption of the device migration data
* stream.
*
* STOP -> RESUMING
* Entering the RESUMING state starts a process of restoring the device state
* and will return a new data_fd. The data stream fed into the data_fd should
* be taken from the data transfer output of a single FD during saving from
* a compatible device. The migration driver may alter/reset the internal
* device state for this arc if required to prepare the device to receive the
* migration data.
*
* any -> ERROR
* ERROR cannot be specified as a device state, however any transition request
* can be failed with an errno return and may then move the device_state into
* ERROR. In this case the device was unable to execute the requested arc and
* was also unable to restore the device to any valid device_state.
* To recover from ERROR VFIO_DEVICE_RESET must be used to return the
* device_state back to RUNNING.
*
* The optional peer to peer (P2P) quiescent state is intended to be a quiescent
* state for the device for the purposes of managing multiple devices within a
* user context where peer-to-peer DMA between devices may be active. The
* RUNNING_P2P states must prevent the device from initiating
* any new P2P DMA transactions. If the device can identify P2P transactions
* then it can stop only P2P DMA, otherwise it must stop all DMA. The migration
* driver must complete any such outstanding operations prior to completing the
* FSM arc into a P2P state. For the purpose of specification the states
* behave as though the device was fully running if not supported. Like while in
* STOP or STOP_COPY the user must not touch the device, otherwise the state
* can be exited.
*
* The remaining possible transitions are interpreted as combinations of the
* above FSM arcs. As there are multiple paths through the FSM arcs the path
* should be selected based on the following rules:
* - Select the shortest path.
* Refer to vfio_mig_get_next_state() for the result of the algorithm.
*
* The automatic transit through the FSM arcs that make up the combination
* transition is invisible to the user. When working with combination arcs the
* user may see any step along the path in the device_state if SET_STATE
* fails. When handling these types of errors users should anticipate future
* revisions of this protocol using new states and those states becoming
* visible in this case.
*
* The optional states cannot be used with SET_STATE if the device does not
* support them. The user can discover if these states are supported by using
* VFIO_DEVICE_FEATURE_MIGRATION. By using combination transitions the user can
* avoid knowing about these optional states if the kernel driver supports them.
*/
enum vfio_device_mig_state {
VFIO_DEVICE_STATE_ERROR = 0,
VFIO_DEVICE_STATE_STOP = 1,
VFIO_DEVICE_STATE_RUNNING = 2,
VFIO_DEVICE_STATE_STOP_COPY = 3,
VFIO_DEVICE_STATE_RESUMING = 4,
VFIO_DEVICE_STATE_RUNNING_P2P = 5,
};
/* -------- API for Type1 VFIO IOMMU -------- */
/**