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[PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update
From: |
Lukasz Maniak |
Subject: |
[PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update |
Date: |
Thu, 7 Oct 2021 18:23:55 +0200 |
PCIe devices implementing SR-IOV may need to perform certain actions
before the VFs are unrealized or vice versa.
Signed-off-by: Lukasz Maniak <lukasz.maniak@linux.intel.com>
---
docs/pcie_sriov.txt | 2 +-
hw/pci/pcie_sriov.c | 14 +++++++++++++-
include/hw/pci/pcie_sriov.h | 8 +++++++-
3 files changed, 21 insertions(+), 3 deletions(-)
diff --git a/docs/pcie_sriov.txt b/docs/pcie_sriov.txt
index f5e891e1d4..63ca1a7b8e 100644
--- a/docs/pcie_sriov.txt
+++ b/docs/pcie_sriov.txt
@@ -57,7 +57,7 @@ setting up a BAR for a VF.
/* Add and initialize the SR/IOV capability */
pcie_sriov_pf_init(d, 0x200, "your_virtual_dev",
vf_devid, initial_vfs, total_vfs,
- fun_offset, stride);
+ fun_offset, stride, pre_vfs_update_cb);
/* Set up individual VF BARs (parameters as for normal BARs) */
pcie_sriov_pf_init_vf_bar( ... )
diff --git a/hw/pci/pcie_sriov.c b/hw/pci/pcie_sriov.c
index 501a1ff433..cac2aee061 100644
--- a/hw/pci/pcie_sriov.c
+++ b/hw/pci/pcie_sriov.c
@@ -30,7 +30,8 @@ static void unregister_vfs(PCIDevice *dev);
void pcie_sriov_pf_init(PCIDevice *dev, uint16_t offset,
const char *vfname, uint16_t vf_dev_id,
uint16_t init_vfs, uint16_t total_vfs,
- uint16_t vf_offset, uint16_t vf_stride)
+ uint16_t vf_offset, uint16_t vf_stride,
+ SriovVfsUpdate pre_vfs_update)
{
uint8_t *cfg = dev->config + offset;
uint8_t *wmask;
@@ -41,6 +42,7 @@ void pcie_sriov_pf_init(PCIDevice *dev, uint16_t offset,
dev->exp.sriov_pf.num_vfs = 0;
dev->exp.sriov_pf.vfname = g_strdup(vfname);
dev->exp.sriov_pf.vf = NULL;
+ dev->exp.sriov_pf.pre_vfs_update = pre_vfs_update;
pci_set_word(cfg + PCI_SRIOV_VF_OFFSET, vf_offset);
pci_set_word(cfg + PCI_SRIOV_VF_STRIDE, vf_stride);
@@ -180,6 +182,11 @@ static void register_vfs(PCIDevice *dev)
assert(dev->exp.sriov_pf.vf);
trace_sriov_register_vfs(SRIOV_ID(dev), num_vfs);
+
+ if (dev->exp.sriov_pf.pre_vfs_update) {
+ dev->exp.sriov_pf.pre_vfs_update(dev, dev->exp.sriov_pf.num_vfs,
num_vfs);
+ }
+
for (i = 0; i < num_vfs; i++) {
dev->exp.sriov_pf.vf[i] = register_vf(dev, devfn,
dev->exp.sriov_pf.vfname, i);
if (!dev->exp.sriov_pf.vf[i]) {
@@ -198,6 +205,11 @@ static void unregister_vfs(PCIDevice *dev)
uint16_t i;
trace_sriov_unregister_vfs(SRIOV_ID(dev), num_vfs);
+
+ if (dev->exp.sriov_pf.pre_vfs_update) {
+ dev->exp.sriov_pf.pre_vfs_update(dev, dev->exp.sriov_pf.num_vfs, 0);
+ }
+
for (i = 0; i < num_vfs; i++) {
PCIDevice *vf = dev->exp.sriov_pf.vf[i];
object_property_set_bool(OBJECT(vf), "realized", false, &local_err);
diff --git a/include/hw/pci/pcie_sriov.h b/include/hw/pci/pcie_sriov.h
index 0974f00054..9ab48b79c0 100644
--- a/include/hw/pci/pcie_sriov.h
+++ b/include/hw/pci/pcie_sriov.h
@@ -13,11 +13,16 @@
#ifndef QEMU_PCIE_SRIOV_H
#define QEMU_PCIE_SRIOV_H
+typedef void (*SriovVfsUpdate)(PCIDevice *dev, uint16_t prev_num_vfs,
+ uint16_t num_vfs);
+
struct PCIESriovPF {
uint16_t num_vfs; /* Number of virtual functions created */
uint8_t vf_bar_type[PCI_NUM_REGIONS]; /* Store type for each VF bar */
const char *vfname; /* Reference to the device type used for the
VFs */
PCIDevice **vf; /* Pointer to an array of num_vfs VF devices */
+
+ SriovVfsUpdate pre_vfs_update; /* Callback preceding VFs count change */
};
struct PCIESriovVF {
@@ -28,7 +33,8 @@ struct PCIESriovVF {
void pcie_sriov_pf_init(PCIDevice *dev, uint16_t offset,
const char *vfname, uint16_t vf_dev_id,
uint16_t init_vfs, uint16_t total_vfs,
- uint16_t vf_offset, uint16_t vf_stride);
+ uint16_t vf_offset, uint16_t vf_stride,
+ SriovVfsUpdate pre_vfs_update);
void pcie_sriov_pf_exit(PCIDevice *dev);
/* Set up a VF bar in the SR/IOV bar area */
--
2.25.1
- [PATCH 15/15] docs: Add documentation for SR-IOV and Virtualization Enhancements, (continued)
- [PATCH 15/15] docs: Add documentation for SR-IOV and Virtualization Enhancements, Lukasz Maniak, 2021/10/07
- [PATCH 06/15] hw/nvme: Add support for Primary Controller Capabilities, Lukasz Maniak, 2021/10/07
- [PATCH 07/15] hw/nvme: Add support for Secondary Controller List, Lukasz Maniak, 2021/10/07
- [PATCH 09/15] hw/nvme: Implement the Function Level Reset, Lukasz Maniak, 2021/10/07
- [PATCH 11/15] hw/nvme: Calculate BAR atributes in a function, Lukasz Maniak, 2021/10/07
- [PATCH 01/15] pcie: Set default and supported MaxReadReq to 512, Lukasz Maniak, 2021/10/07
- [PATCH 03/15] pcie: Add some SR/IOV API documentation in docs/pcie_sriov.txt, Lukasz Maniak, 2021/10/07
- [PATCH 14/15] hw/nvme: Add support for the Virtualization Management command, Lukasz Maniak, 2021/10/07
- [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update,
Lukasz Maniak <=
- Re: [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Michael S. Tsirkin, 2021/10/12
- Re: [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Lukasz Maniak, 2021/10/12
- Re: [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Michael S. Tsirkin, 2021/10/13
- Re: [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Lukasz Maniak, 2021/10/15
- Re: [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Michael S. Tsirkin, 2021/10/15
- Re: [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Lukasz Maniak, 2021/10/20
[PATCH 08/15] pcie: Add 1.2 version token for the Power Management Capability, Lukasz Maniak, 2021/10/07
[PATCH 05/15] hw/nvme: Add support for SR-IOV, Lukasz Maniak, 2021/10/07