github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-09-26 03:04:31 +00:00
Code Issues Projects Releases Wiki Activity

ACRN:DM:PCI: Add the support of allocating resource for PCI ROM bar

Browse Source 
Now the device model only supports the 0..5 PCI bar for PCI/PCIE devices.
This tries to allocate the PCI_MEM32 resource for PCI ROM bar.

V1->V2: Use the PCI_ROMBAR as bar index and PCIBAR_ROM bar type when calling
the pci_emul_alloc_bar to allocate the guest physical addr for PCI ROM bar.
And it will allocate the resource from PCIBAR_MEM32 region.

V2->V3: Add more comments that describes the parameter of pci_emul_alloc_bar.

Tracked-On: #8175
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Acked-by: Wang Yu <yu1.wang@intel.com>
This commit is contained in:
Zhao Yakui
2022-09-21 13:13:08 +08:00
committed by acrnsi-robot
parent 50cdcb3660
commit 270aaf82d8
2 changed files with 52 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
devicemodel/include/pci_core.h
View File

@@ -103,7 +103,9 @@ enum pcibar_type {
PCIBAR_IO,
PCIBAR_MEM32,
PCIBAR_MEM64,
PCIBAR_MEMHI64
PCIBAR_MEMHI64,
/* the type for ROM bar. It will be allocated from PCI_EMUL_MEM32 region */
PCIBAR_ROM
};
struct pcibar {
@@ -135,6 +137,7 @@ enum lintr_stat {
PENDING
};
#define PCI_ROMBAR (PCIR_MAX_BAR_0 + 1) /* ROM BAR index in Type 0 Header */
struct pci_vdev {
struct pci_vdev_ops *dev_ops;
struct vmctx *vmctx;
@@ -176,7 +179,8 @@ struct pci_vdev {
void *arg; /* devemu-private data */
uint8_t cfgdata[PCI_REGMAX + 1];
struct pcibar bar[PCI_BARMAX + 1];
/* 0..5 is used for PCI MMIO/IO bar. 6 is used for PCI ROMbar */
struct pcibar bar[PCI_BARMAX + 2];
};
struct gsi_dev {
@@ -311,6 +315,22 @@ void msicap_cfgwrite(struct pci_vdev *pi, int capoff, int offset,
void msixcap_cfgwrite(struct pci_vdev *pi, int capoff, int offset,
int bytes, uint32_t val);
void pci_callback(void);
/*
* @brief allocate bar region for virtual PCI device
*
* @param dev Pointer to struct pci_vdev representing virtual PCI device.
* @param idx the bar_idx for the request bar region
* @param type the region type for the request bar region
* @param size the region size for the request bar region
* It can support the allocation of bar_region for bar_idx 0..5 and
* the bar type can be PCIBAR_IO/PCIBAR_MEM32/PCIBAR_MEM64.
* It can support the allocation of ROM bar for PCI_ROMBAR and only allow
* that the bar type is PCIBAR_ROM.
*
* @Return 0 indicates that the allocation is successful.
* error indicates that it fails in the allocation of bar region.
*/
int pci_emul_alloc_bar(struct pci_vdev *pdi, int idx,
enum pcibar_type type, uint64_t size);
int pci_emul_alloc_pbar(struct pci_vdev *pdi, int idx,