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xen-pcifront: Xen PCI frontend driver.

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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>
This commit is contained in:
Ryan Wilson 2010-08-02 21:31:05 -04:00 committed by Konrad Rzeszutek Wilk
parent b78c951256
commit 956a9202cd
4 changed files with 1283 additions and 0 deletions
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21
drivers/pci/Kconfig
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@ -40,6 +40,27 @@ config PCI_STUB
When in doubt, say N.
config XEN_PCIDEV_FRONTEND
tristate "Xen PCI Frontend"
depends on PCI && X86 && XEN
select HOTPLUG
select PCI_XEN
default y
help
The PCI device frontend driver allows the kernel to import arbitrary
PCI devices from a PCI backend to support PCI driver domains.
config XEN_PCIDEV_FE_DEBUG
bool "Xen PCI Frontend debugging"
depends on XEN_PCIDEV_FRONTEND && PCI_DEBUG
help
Say Y here if you want the Xen PCI frontend to produce a bunch of debug
messages to the system log. Select this if you are having a
problem with Xen PCI frontend support and want to see more of what is
going on.
When in doubt, say N.
config HT_IRQ
bool "Interrupts on hypertransport devices"
default y

2
drivers/pci/Makefile
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@ -65,6 +65,8 @@ obj-$(CONFIG_PCI_SYSCALL) += syscall.o
obj-$(CONFIG_PCI_STUB) += pci-stub.o
obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += xen-pcifront.o
ifeq ($(CONFIG_PCI_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
endif

1148
drivers/pci/xen-pcifront.c Normal file
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File diff suppressed because it is too large Load Diff

112
include/xen/interface/io/pciif.h Normal file
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@ -0,0 +1,112 @@
/*
* PCI Backend/Frontend Common Data Structures & Macros
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Author: Ryan Wilson <hap9@epoch.ncsc.mil>
*/
#ifndef __XEN_PCI_COMMON_H__
#define __XEN_PCI_COMMON_H__
/* Be sure to bump this number if you change this file */
#define XEN_PCI_MAGIC "7"
/* xen_pci_sharedinfo flags */
#define _XEN_PCIF_active (0)
#define XEN_PCIF_active (1<<_XEN_PCIF_active)
#define _XEN_PCIB_AERHANDLER (1)
#define XEN_PCIB_AERHANDLER (1<<_XEN_PCIB_AERHANDLER)
#define _XEN_PCIB_active (2)
#define XEN_PCIB_active (1<<_XEN_PCIB_active)
/* xen_pci_op commands */
#define XEN_PCI_OP_conf_read (0)
#define XEN_PCI_OP_conf_write (1)
#define XEN_PCI_OP_enable_msi (2)
#define XEN_PCI_OP_disable_msi (3)
#define XEN_PCI_OP_enable_msix (4)
#define XEN_PCI_OP_disable_msix (5)
#define XEN_PCI_OP_aer_detected (6)
#define XEN_PCI_OP_aer_resume (7)
#define XEN_PCI_OP_aer_mmio (8)
#define XEN_PCI_OP_aer_slotreset (9)
/* xen_pci_op error numbers */
#define XEN_PCI_ERR_success (0)
#define XEN_PCI_ERR_dev_not_found (-1)
#define XEN_PCI_ERR_invalid_offset (-2)
#define XEN_PCI_ERR_access_denied (-3)
#define XEN_PCI_ERR_not_implemented (-4)
/* XEN_PCI_ERR_op_failed - backend failed to complete the operation */
#define XEN_PCI_ERR_op_failed (-5)
/*
* it should be PAGE_SIZE-sizeof(struct xen_pci_op))/sizeof(struct msix_entry))
* Should not exceed 128
*/
#define SH_INFO_MAX_VEC 128
struct xen_msix_entry {
uint16_t vector;
uint16_t entry;
};
struct xen_pci_op {
/* IN: what action to perform: XEN_PCI_OP_* */
uint32_t cmd;
/* OUT: will contain an error number (if any) from errno.h */
int32_t err;
/* IN: which device to touch */
uint32_t domain; /* PCI Domain/Segment */
uint32_t bus;
uint32_t devfn;
/* IN: which configuration registers to touch */
int32_t offset;
int32_t size;
/* IN/OUT: Contains the result after a READ or the value to WRITE */
uint32_t value;
/* IN: Contains extra infor for this operation */
uint32_t info;
/*IN: param for msi-x */
struct xen_msix_entry msix_entries[SH_INFO_MAX_VEC];
};
/*used for pcie aer handling*/
struct xen_pcie_aer_op {
/* IN: what action to perform: XEN_PCI_OP_* */
uint32_t cmd;
/*IN/OUT: return aer_op result or carry error_detected state as input*/
int32_t err;
/* IN: which device to touch */
uint32_t domain; /* PCI Domain/Segment*/
uint32_t bus;
uint32_t devfn;
};
struct xen_pci_sharedinfo {
/* flags - XEN_PCIF_* */
uint32_t flags;
struct xen_pci_op op;
struct xen_pcie_aer_op aer_op;
};
#endif /* __XEN_PCI_COMMON_H__ */