search for: pci_read_config_byt

Displaying 20 results from an estimated 117 matches for "pci_read_config_byt".

Did you mean: pci_read_config_byte
[PATCH v3 04/18] virtio: Implement get_shm_region for PCI transport
2020 Aug 19
0
[PATCH v3 04/18] virtio: Implement get_shm_region for PCI transport
...ct pci_dev *dev, u8 required_id, + u8 *bar, u64 *offset, u64 *len) +{ + int pos; + + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); pos > 0; + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { + u8 type, cap_len, id; + u32 tmp32; + u64 res_offset, res_length; + + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, + cfg_type), &type); + if (type != VIRTIO_PCI_CAP_SHARED_MEMORY_CFG) + continue; + + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, + cap_len), &cap_len); + if (cap_len != sizeof(struct virtio_pci_cap64)) { +...
[PATCH v2 2/2] vfio: add virtio pci quirk
2016 Aug 30
4
[PATCH v2 2/2] vfio: add virtio pci quirk
..._capability(struct pci_dev *dev, u8 cfg_type) Does inlining this really make sense? > +{ > + int pos; > + > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > + pos > 0; > + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { > + u8 type; > + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, > + cfg_type), > + &type); > + > + if (type != cfg_type) > + continue; > + > + /* Ignore structures with reserved BAR values */ > + if (type != VIRTIO_PCI_CAP_PCI_CFG) { > + u8 bar; > + > + pci_...
[PATCH v2 2/2] vfio: add virtio pci quirk
2016 Aug 30
4
[PATCH v2 2/2] vfio: add virtio pci quirk
..._capability(struct pci_dev *dev, u8 cfg_type) Does inlining this really make sense? > +{ > + int pos; > + > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > + pos > 0; > + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { > + u8 type; > + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, > + cfg_type), > + &type); > + > + if (type != cfg_type) > + continue; > + > + /* Ignore structures with reserved BAR values */ > + if (type != VIRTIO_PCI_CAP_PCI_CFG) { > + u8 bar; > + > + pci_...
[PATCH 01/05] fixup! virtio_pci: modern driver
2015 Jan 20
0
[PATCH 01/05] fixup! virtio_pci: modern driver
...- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -26,13 +26,13 @@ static void __iomem *map_capability(struct pci_dev *dev, int off, u32 start, u32 size, size_t *len) { - u8 type_and_bar, bar; + u8 bar; u32 offset, length; void __iomem *p; pci_read_config_byte(dev, off + offsetof(struct virtio_pci_cap, - type_and_bar), - &type_and_bar); + bar), + &bar); pci_read_config_dword(dev, off + offsetof(struct virtio_pci_cap, offset), &offset); pci_read_config_dword(dev, off + offsetof(struct virtio_pci_cap, len...
[PATCH 01/05] fixup! virtio_pci: modern driver
2015 Jan 20
0
[PATCH 01/05] fixup! virtio_pci: modern driver
...- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -26,13 +26,13 @@ static void __iomem *map_capability(struct pci_dev *dev, int off, u32 start, u32 size, size_t *len) { - u8 type_and_bar, bar; + u8 bar; u32 offset, length; void __iomem *p; pci_read_config_byte(dev, off + offsetof(struct virtio_pci_cap, - type_and_bar), - &type_and_bar); + bar), + &bar); pci_read_config_dword(dev, off + offsetof(struct virtio_pci_cap, offset), &offset); pci_read_config_dword(dev, off + offsetof(struct virtio_pci_cap, len...
[PATCH RFC 3/3] vfio: add virtio pci quirk
2016 Apr 18
1
[PATCH RFC 3/3] vfio: add virtio pci quirk
...t same name in virtio code, can we come up with something unique to avoid confusion? > +{ > + int pos; > + > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > + pos > 0; > + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { > + u8 type; > + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, > + cfg_type), > + &type); > + > + if (type != cfg_type) > + continue; > + > + /* Ignore structures with reserved BAR values */ > + if (type != VIRTIO_PCI_CAP_PCI_CFG) { > + u8 bar; > + > + pci_...
[PATCH RFC 3/3] vfio: add virtio pci quirk
2016 Apr 18
1
[PATCH RFC 3/3] vfio: add virtio pci quirk
...t same name in virtio code, can we come up with something unique to avoid confusion? > +{ > + int pos; > + > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > + pos > 0; > + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { > + u8 type; > + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, > + cfg_type), > + &type); > + > + if (type != cfg_type) > + continue; > + > + /* Ignore structures with reserved BAR values */ > + if (type != VIRTIO_PCI_CAP_PCI_CFG) { > + u8 bar; > + > + pci_...
[PATCH v2 2/2] vfio: add virtio pci quirk
2016 Aug 30
2
[PATCH v2 2/2] vfio: add virtio pci quirk
...t; > > > +{ > > > + int pos; > > > + > > > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > > > + pos > 0; > > > + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { > > > + u8 type; > > > + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, > > > + cfg_type), > > > + &type); > > > + > > > + if (type != cfg_type) > > > + continue; > > > + > > > + /* Ignore structures with reserved BAR values */ > > &gt...
[PATCH v2 2/2] vfio: add virtio pci quirk
2016 Aug 30
2
[PATCH v2 2/2] vfio: add virtio pci quirk
...t; > > > +{ > > > + int pos; > > > + > > > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > > > + pos > 0; > > > + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { > > > + u8 type; > > > + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, > > > + cfg_type), > > > + &type); > > > + > > > + if (type != cfg_type) > > > + continue; > > > + > > > + /* Ignore structures with reserved BAR values */ > > &gt...
[PATCH RFC 3/3] vfio: add virtio pci quirk
2016 Apr 18
0
[PATCH RFC 3/3] vfio: add virtio pci quirk
...Returns offset of the capability, or 0. + */ +static inline int virtio_pci_find_capability(struct pci_dev *dev, u8 cfg_type) +{ + int pos; + + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); + pos > 0; + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { + u8 type; + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, + cfg_type), + &type); + + if (type != cfg_type) + continue; + + /* Ignore structures with reserved BAR values */ + if (type != VIRTIO_PCI_CAP_PCI_CFG) { + u8 bar; + + pci_read_config_byte(dev, pos + + offsetof(struct...
[PATCH v2 2/2] vfio: add virtio pci quirk
2016 Aug 30
0
[PATCH v2 2/2] vfio: add virtio pci quirk
...Returns offset of the capability, or 0. + */ +static inline int virtio_pci_find_capability(struct pci_dev *dev, u8 cfg_type) +{ + int pos; + + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); + pos > 0; + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { + u8 type; + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, + cfg_type), + &type); + + if (type != cfg_type) + continue; + + /* Ignore structures with reserved BAR values */ + if (type != VIRTIO_PCI_CAP_PCI_CFG) { + u8 bar; + + pci_read_config_byte(dev, pos + + offsetof(struct...
[PATCH v2 0/2] vfio: blacklist legacy virtio devices
2016 Aug 30
6
[PATCH v2 0/2] vfio: blacklist legacy virtio devices
Legacy virtio devices always bypassed an IOMMU, so using them with vfio was never safe. This adds a quirk detecting these and disabling VFIO unless the noiommu mode is used. At the moment, this only applies to virtio-pci devices. The patch might make sense on stable as well. Michael S. Tsirkin (2): vfio: report group noiommu status vfio: add virtio pci quirk
[PATCH v2 0/2] vfio: blacklist legacy virtio devices
2016 Aug 30
6
[PATCH v2 0/2] vfio: blacklist legacy virtio devices
Legacy virtio devices always bypassed an IOMMU, so using them with vfio was never safe. This adds a quirk detecting these and disabling VFIO unless the noiommu mode is used. At the moment, this only applies to virtio-pci devices. The patch might make sense on stable as well. Michael S. Tsirkin (2): vfio: report group noiommu status vfio: add virtio pci quirk
[PATCH] virtio-pci: alloc only resources actually used.
2015 Jun 18
1
[PATCH] virtio-pci: alloc only resources actually used.
Hi, > > +static struct resource *request_capability(struct pci_dev *dev, int off, > > + const char *name) > > +{ > > + u8 bar; > > + u32 offset, length; > > + > > + pci_read_config_byte(dev, off + offsetof(struct virtio_pci_cap, > > + bar), > > + &bar); > > + pci_read_config_dword(dev, off + offsetof(struct virtio_pci_cap, offset), > > + &offset); > > + pci_read_config_dword(dev, off + offsetof(struct virtio_pci_cap, lengt...
[PATCH] virtio-pci: alloc only resources actually used.
2015 Jun 18
1
[PATCH] virtio-pci: alloc only resources actually used.
Hi, > > +static struct resource *request_capability(struct pci_dev *dev, int off, > > + const char *name) > > +{ > > + u8 bar; > > + u32 offset, length; > > + > > + pci_read_config_byte(dev, off + offsetof(struct virtio_pci_cap, > > + bar), > > + &bar); > > + pci_read_config_dword(dev, off + offsetof(struct virtio_pci_cap, offset), > > + &offset); > > + pci_read_config_dword(dev, off + offsetof(struct virtio_pci_cap, lengt...
[PATCH v2 2/2] vfio: add virtio pci quirk
2016 Aug 30
0
[PATCH v2 2/2] vfio: add virtio pci quirk
...; Does inlining this really make sense? > > > +{ > > + int pos; > > + > > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > > + pos > 0; > > + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { > > + u8 type; > > + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, > > + cfg_type), > > + &type); > > + > > + if (type != cfg_type) > > + continue; > > + > > + /* Ignore structures with reserved BAR values */ > > + if (type != VIRTIO_PCI_CAP_PCI_CFG)...
[PATCH RFC 0/3] virtio-pci: iommu support
2016 Apr 18
5
[PATCH RFC 0/3] virtio-pci: iommu support
This is an attempt to allow enabling IOMMU for DMA. Design: - new feature bit IOMMU_PLATFORM which means host won't bypass IOMMU - virtio core uses DMA API if it sees IOMMU_PLATFORM - add quirk for vfio to disable device unless IOMMU_PLATFORM is set or the no-iommu mode is enabled - while I'm not sure how it will be used, it seems like a good idea to also have
[PATCH RFC 0/3] virtio-pci: iommu support
2016 Apr 18
5
[PATCH RFC 0/3] virtio-pci: iommu support
This is an attempt to allow enabling IOMMU for DMA. Design: - new feature bit IOMMU_PLATFORM which means host won't bypass IOMMU - virtio core uses DMA API if it sees IOMMU_PLATFORM - add quirk for vfio to disable device unless IOMMU_PLATFORM is set or the no-iommu mode is enabled - while I'm not sure how it will be used, it seems like a good idea to also have
[PATCH v2 2/2] vfio: add virtio pci quirk
2016 Aug 30
0
[PATCH v2 2/2] vfio: add virtio pci quirk
...gt; > + int pos; > > > > + > > > > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > > > > + pos > 0; > > > > + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { > > > > + u8 type; > > > > + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, > > > > + cfg_type), > > > > + &type); > > > > + > > > > + if (type != cfg_type) > > > > + continue; > > > > + > > > > + /* Ignore structures with r...
[PATCH V3] vdpa: introduce virtio pci driver
2020 Jun 10
2
[PATCH V3] vdpa: introduce virtio pci driver
...u32 ioresource_types, int *bars) >> +{ >> + int pos; >> + >> + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); >> + pos > 0; >> + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { >> + u8 type, bar; >> + >> + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, >> + cfg_type), >> + &type); >> + pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap, >> + bar), >> + &bar); >> + >> + /* Ignore structures with reserved BAR val...