motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 08:13:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

pcie_sriov: Allow user to create SR-IOV device

Browse source 
A user can create a SR-IOV device by specifying the PF with the
sriov-pf property of the VFs. The VFs must be added before the PF.

A user-creatable VF must have PCIDeviceClass::sriov_vf_user_creatable
set. Such a VF cannot refer to the PF because it is created before the
PF.

A PF that user-creatable VFs can be attached calls
pcie_sriov_pf_init_from_user_created_vfs() during realization and
pcie_sriov_pf_exit() when exiting.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20240715-sriov-v5-5-3f5539093ffc@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 2024-07-15 14:19:11 +09:00 • committed by Michael S. Tsirkin
parent 47cc753e50
commit 122173a583
4 changed files with 293 additions and 83 deletions
Download patch file Download diff file Expand all files Collapse all files

6
include/hw/pci/pci_device.h
View file

@ -37,6 +37,8 @@ struct PCIDeviceClass {
uint16_t subsystem_id; /* only for header type = 0 */
const char *romfile; /* rom bar */
bool sriov_vf_user_creatable;
};
enum PCIReqIDType {
@ -160,6 +162,8 @@ struct PCIDevice {
/* ID of standby device in net_failover pair */
char *failover_pair_id;
uint32_t acpi_index;
char *sriov_pf;
};
static inline int pci_intx(PCIDevice *pci_dev)
@ -192,7 +196,7 @@ static inline int pci_is_express_downstream_port(const PCIDevice *d)
static inline int pci_is_vf(const PCIDevice *d)
{
return d->exp.sriov_vf.pf != NULL;
return d->sriov_pf || d->exp.sriov_vf.pf != NULL;
}
static inline uint32_t pci_config_size(const PCIDevice *d)

18
include/hw/pci/pcie_sriov.h
View file

@ -18,6 +18,7 @@
typedef struct PCIESriovPF {
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 */
bool vf_user_created; /* If VFs are created by user */
} PCIESriovPF;
typedef struct PCIESriovVF {
@ -40,6 +41,23 @@ void pcie_sriov_pf_init_vf_bar(PCIDevice *dev, int region_num,
void pcie_sriov_vf_register_bar(PCIDevice *dev, int region_num,
MemoryRegion *memory);
/**
* pcie_sriov_pf_init_from_user_created_vfs() - Initialize PF with user-created
* VFs.
* @dev: A PCIe device being realized.
* @offset: The offset of the SR-IOV capability.
* @errp: pointer to Error*, to store an error if it happens.
*
* Return: The size of added capability. 0 if the user did not create VFs.
* -1 if failed.
*/
int16_t pcie_sriov_pf_init_from_user_created_vfs(PCIDevice *dev,
uint16_t offset,
Error **errp);
bool pcie_sriov_register_device(PCIDevice *dev, Error **errp);
void pcie_sriov_unregister_device(PCIDevice *dev);
/*
* Default (minimal) page size support values
* as required by the SR/IOV standard: