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pcie_sriov: Remove num_vfs from PCIESriovPF

Browse source 
num_vfs is not migrated so use PCI_SRIOV_CTRL_VFE and PCI_SRIOV_NUM_VF
instead.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20250116-reuse-v20-10-7cb370606368@daynix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Akihiko Odaki 2025-01-16 18:01:01 +09:00 • committed by Michael S. Tsirkin
parent b85901e728
commit 5e7dd17e43
3 changed files with 28 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

38
hw/pci/pcie_sriov.c
View file

@ -51,7 +51,6 @@ bool pcie_sriov_pf_init(PCIDevice *dev, uint16_t offset,
pcie_add_capability(dev, PCI_EXT_CAP_ID_SRIOV, 1,
offset, PCI_EXT_CAP_SRIOV_SIZEOF);
dev->exp.sriov_cap = offset;
dev->exp.sriov_pf.num_vfs = 0;
dev->exp.sriov_pf.vf = NULL;
pci_set_word(cfg + PCI_SRIOV_VF_OFFSET, vf_offset);
@ -188,29 +187,28 @@ static void register_vfs(PCIDevice *dev)
assert(sriov_cap > 0);
num_vfs = pci_get_word(dev->config + sriov_cap + PCI_SRIOV_NUM_VF);
if (num_vfs > pci_get_word(dev->config + sriov_cap + PCI_SRIOV_TOTAL_VF)) {
return;
}
trace_sriov_register_vfs(dev->name, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), num_vfs);
for (i = 0; i < num_vfs; i++) {
pci_set_enabled(dev->exp.sriov_pf.vf[i], true);
}
dev->exp.sriov_pf.num_vfs = num_vfs;
pci_set_word(dev->wmask + sriov_cap + PCI_SRIOV_NUM_VF, 0);
}
static void unregister_vfs(PCIDevice *dev)
{
uint16_t num_vfs = dev->exp.sriov_pf.num_vfs;
uint8_t *cfg = dev->config + dev->exp.sriov_cap;
uint16_t i;
trace_sriov_unregister_vfs(dev->name, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), num_vfs);
for (i = 0; i < num_vfs; i++) {
PCI_FUNC(dev->devfn));
for (i = 0; i < pci_get_word(cfg + PCI_SRIOV_TOTAL_VF); i++) {
pci_set_enabled(dev->exp.sriov_pf.vf[i], false);
}
dev->exp.sriov_pf.num_vfs = 0;
pci_set_word(dev->wmask + dev->exp.sriov_cap + PCI_SRIOV_NUM_VF, 0xffff);
}
void pcie_sriov_config_write(PCIDevice *dev, uint32_t address,
@ -236,6 +234,17 @@ void pcie_sriov_config_write(PCIDevice *dev, uint32_t address,
} else {
unregister_vfs(dev);
}
} else if (range_covers_byte(off, len, PCI_SRIOV_NUM_VF)) {
uint8_t *cfg = dev->config + sriov_cap;
uint8_t *wmask = dev->wmask + sriov_cap;
uint16_t num_vfs = pci_get_word(cfg + PCI_SRIOV_NUM_VF);
uint16_t wmask_val = PCI_SRIOV_CTRL_MSE | PCI_SRIOV_CTRL_ARI;
if (num_vfs <= pci_get_word(cfg + PCI_SRIOV_TOTAL_VF)) {
wmask_val |= PCI_SRIOV_CTRL_VFE;
}
pci_set_word(wmask + PCI_SRIOV_CTRL, wmask_val);
}
}
@ -252,6 +261,8 @@ void pcie_sriov_pf_reset(PCIDevice *dev)
unregister_vfs(dev);
pci_set_word(dev->config + sriov_cap + PCI_SRIOV_NUM_VF, 0);
pci_set_word(dev->wmask + sriov_cap + PCI_SRIOV_CTRL,
PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE | PCI_SRIOV_CTRL_ARI);
/*
* Default is to use 4K pages, software can modify it
@ -298,7 +309,7 @@ PCIDevice *pcie_sriov_get_pf(PCIDevice *dev)
PCIDevice *pcie_sriov_get_vf_at_index(PCIDevice *dev, int n)
{
assert(!pci_is_vf(dev));
if (n < dev->exp.sriov_pf.num_vfs) {
if (n < pcie_sriov_num_vfs(dev)) {
return dev->exp.sriov_pf.vf[n];
}
return NULL;
@ -306,5 +317,10 @@ PCIDevice *pcie_sriov_get_vf_at_index(PCIDevice *dev, int n)
uint16_t pcie_sriov_num_vfs(PCIDevice *dev)
{
return dev->exp.sriov_pf.num_vfs;
uint16_t sriov_cap = dev->exp.sriov_cap;
uint8_t *cfg = dev->config + sriov_cap;
return sriov_cap &&
(pci_get_word(cfg + PCI_SRIOV_CTRL) & PCI_SRIOV_CTRL_VFE) ?
pci_get_word(cfg + PCI_SRIOV_NUM_VF) : 0;
}

2
hw/pci/trace-events
View file

@ -14,7 +14,7 @@ msix_write_config(char *name, bool enabled, bool masked) "dev %s enabled %d mask
# hw/pci/pcie_sriov.c
sriov_register_vfs(const char *name, int slot, int function, int num_vfs) "%s %02x:%x: creating %d vf devs"
sriov_unregister_vfs(const char *name, int slot, int function, int num_vfs) "%s %02x:%x: Unregistering %d vf devs"
sriov_unregister_vfs(const char *name, int slot, int function) "%s %02x:%x: Unregistering vf devs"
sriov_config_write(const char *name, int slot, int fun, uint32_t offset, uint32_t val, uint32_t len) "%s %02x:%x: sriov offset 0x%x val 0x%x len %d"
# pcie.c

1
include/hw/pci/pcie_sriov.h
View file

@ -16,7 +16,6 @@
#include "hw/pci/pci.h"
typedef 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 */
PCIDevice **vf; /* Pointer to an array of num_vfs VF devices */
} PCIESriovPF;