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hv: refine function find_vdev

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Change name find_vdev to find_available_vdev and add comments

Tracked-On: #4433

Signed-off-by: Yuan Liu <yuan1.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yuan Liu 2020-03-05 21:05:43 +08:00 committed by wenlingz
parent d67d0538e6
commit 2a4235f200
1 changed files with 17 additions and 5 deletions
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22
hypervisor/dm/vpci/vpci.c
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@ -41,7 +41,7 @@ static void deinit_prelaunched_vm_vpci(struct acrn_vm *vm);
static void deinit_postlaunched_vm_vpci(struct acrn_vm *vm); static void deinit_postlaunched_vm_vpci(struct acrn_vm *vm);
static int32_t vpci_read_cfg(struct acrn_vpci *vpci, union pci_bdf bdf, uint32_t offset, uint32_t bytes, uint32_t *val); static int32_t vpci_read_cfg(struct acrn_vpci *vpci, union pci_bdf bdf, uint32_t offset, uint32_t bytes, uint32_t *val);
static int32_t vpci_write_cfg(struct acrn_vpci *vpci, union pci_bdf bdf, uint32_t offset, uint32_t bytes, uint32_t val); static int32_t vpci_write_cfg(struct acrn_vpci *vpci, union pci_bdf bdf, uint32_t offset, uint32_t bytes, uint32_t val);
static struct pci_vdev *find_vdev(struct acrn_vpci *vpci, union pci_bdf bdf); static struct pci_vdev *find_available_vdev(struct acrn_vpci *vpci, union pci_bdf bdf);
/** /**
* @pre vcpu != NULL * @pre vcpu != NULL
@ -86,7 +86,7 @@ static bool vpci_pio_cfgaddr_write(struct acrn_vcpu *vcpu, uint16_t addr, size_t
/* For post-launched VM, ACRN will only handle PT device, all virtual PCI device /* For post-launched VM, ACRN will only handle PT device, all virtual PCI device
* still need to deliver to ACRN DM to handle. * still need to deliver to ACRN DM to handle.
*/ */
if (find_vdev(vpci, vbdf) == NULL) { if (find_available_vdev(vpci, vbdf) == NULL) {
ret = false; ret = false;
} }
} }
@ -333,10 +333,22 @@ static void remove_vdev_pt_iommu_domain(const struct pci_vdev *vdev)
} }
/** /**
* @brief Find an available vdev structure with BDF from a specified vpci structure.
* If the vdev's vpci is the same as the specified vpci, the vdev is available.
* If the vdev's vpci is not the same as the specified vpci, the vdev has already
* been assigned and it is unavailable for SOS.
* If the vdev's vpci is NULL, the vdev is a orphan/zombie instance, it can't
* be accessed by any vpci.
*
* @param vpci Pointer to a specified vpci structure
* @param bdf Indicate the vdev's BDF
*
* @pre vpci != NULL * @pre vpci != NULL
* @pre vpci->vm != NULL * @pre vpci->vm != NULL
*
* @return Return a available vdev instance, otherwise return NULL
*/ */
static struct pci_vdev *find_vdev(struct acrn_vpci *vpci, union pci_bdf bdf) static struct pci_vdev *find_available_vdev(struct acrn_vpci *vpci, union pci_bdf bdf)
{ {
struct pci_vdev *vdev = pci_find_vdev(vpci, bdf); struct pci_vdev *vdev = pci_find_vdev(vpci, bdf);
@ -507,7 +519,7 @@ static int32_t vpci_read_cfg(struct acrn_vpci *vpci, union pci_bdf bdf,
struct pci_vdev *vdev; struct pci_vdev *vdev;
spinlock_obtain(&vpci->lock); spinlock_obtain(&vpci->lock);
vdev = find_vdev(vpci, bdf); vdev = find_available_vdev(vpci, bdf);
if (vdev != NULL) { if (vdev != NULL) {
vdev->vdev_ops->read_vdev_cfg(vdev, offset, bytes, val); vdev->vdev_ops->read_vdev_cfg(vdev, offset, bytes, val);
} else { } else {
@ -529,7 +541,7 @@ static int32_t vpci_write_cfg(struct acrn_vpci *vpci, union pci_bdf bdf,
struct pci_vdev *vdev; struct pci_vdev *vdev;
spinlock_obtain(&vpci->lock); spinlock_obtain(&vpci->lock);
vdev = find_vdev(vpci, bdf); vdev = find_available_vdev(vpci, bdf);
if (vdev != NULL) { if (vdev != NULL) {
vdev->vdev_ops->write_vdev_cfg(vdev, offset, bytes, val); vdev->vdev_ops->write_vdev_cfg(vdev, offset, bytes, val);
} else { } else {