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This is a port of the 2.6.18 Xen PCI front driver with fixes to make it build under 2.6.34 and later (for the full list of changes: git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git historic/xen-pcifront-0.1). It also includes the fixes to make it work properly. [v2: Updated Kconfig, removed crud, added Reviewed-by] [v3: Added 'static', fixed grant table leak, redid Kconfig] [v4: Added one more 'static' and removed comments] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Jan Beulich <JBeulich@novell.com>
113 lines
3.5 KiB
C
113 lines
3.5 KiB
C
/*
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* PCI Backend/Frontend Common Data Structures & Macros
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Author: Ryan Wilson <hap9@epoch.ncsc.mil>
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*/
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#ifndef __XEN_PCI_COMMON_H__
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#define __XEN_PCI_COMMON_H__
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/* Be sure to bump this number if you change this file */
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#define XEN_PCI_MAGIC "7"
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/* xen_pci_sharedinfo flags */
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#define _XEN_PCIF_active (0)
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#define XEN_PCIF_active (1<<_XEN_PCIF_active)
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#define _XEN_PCIB_AERHANDLER (1)
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#define XEN_PCIB_AERHANDLER (1<<_XEN_PCIB_AERHANDLER)
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#define _XEN_PCIB_active (2)
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#define XEN_PCIB_active (1<<_XEN_PCIB_active)
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/* xen_pci_op commands */
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#define XEN_PCI_OP_conf_read (0)
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#define XEN_PCI_OP_conf_write (1)
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#define XEN_PCI_OP_enable_msi (2)
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#define XEN_PCI_OP_disable_msi (3)
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#define XEN_PCI_OP_enable_msix (4)
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#define XEN_PCI_OP_disable_msix (5)
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#define XEN_PCI_OP_aer_detected (6)
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#define XEN_PCI_OP_aer_resume (7)
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#define XEN_PCI_OP_aer_mmio (8)
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#define XEN_PCI_OP_aer_slotreset (9)
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/* xen_pci_op error numbers */
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#define XEN_PCI_ERR_success (0)
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#define XEN_PCI_ERR_dev_not_found (-1)
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#define XEN_PCI_ERR_invalid_offset (-2)
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#define XEN_PCI_ERR_access_denied (-3)
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#define XEN_PCI_ERR_not_implemented (-4)
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/* XEN_PCI_ERR_op_failed - backend failed to complete the operation */
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#define XEN_PCI_ERR_op_failed (-5)
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/*
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* it should be PAGE_SIZE-sizeof(struct xen_pci_op))/sizeof(struct msix_entry))
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* Should not exceed 128
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*/
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#define SH_INFO_MAX_VEC 128
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struct xen_msix_entry {
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uint16_t vector;
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uint16_t entry;
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};
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struct xen_pci_op {
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/* IN: what action to perform: XEN_PCI_OP_* */
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uint32_t cmd;
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/* OUT: will contain an error number (if any) from errno.h */
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int32_t err;
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/* IN: which device to touch */
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uint32_t domain; /* PCI Domain/Segment */
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uint32_t bus;
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uint32_t devfn;
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/* IN: which configuration registers to touch */
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int32_t offset;
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int32_t size;
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/* IN/OUT: Contains the result after a READ or the value to WRITE */
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uint32_t value;
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/* IN: Contains extra infor for this operation */
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uint32_t info;
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/*IN: param for msi-x */
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struct xen_msix_entry msix_entries[SH_INFO_MAX_VEC];
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};
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/*used for pcie aer handling*/
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struct xen_pcie_aer_op {
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/* IN: what action to perform: XEN_PCI_OP_* */
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uint32_t cmd;
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/*IN/OUT: return aer_op result or carry error_detected state as input*/
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int32_t err;
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/* IN: which device to touch */
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uint32_t domain; /* PCI Domain/Segment*/
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uint32_t bus;
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uint32_t devfn;
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};
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struct xen_pci_sharedinfo {
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/* flags - XEN_PCIF_* */
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uint32_t flags;
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struct xen_pci_op op;
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struct xen_pcie_aer_op aer_op;
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};
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#endif /* __XEN_PCI_COMMON_H__ */
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