Commit 956a9202 authored by Ryan Wilson's avatar Ryan Wilson Committed by Konrad Rzeszutek Wilk
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xen-pcifront: Xen PCI frontend driver. 

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: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: default avatarJan Beulich <JBeulich@novell.com>
parent b78c9512

drivers/pci/Kconfig

+21 −0
Original line number Diff line number Diff line
@@ -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

drivers/pci/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -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

drivers/pci/xen-pcifront.c

0 → 100644
+1148 −0

File added.

Preview size limit exceeded, changes collapsed.

include/xen/interface/io/pciif.h

0 → 100644
+112 −0
Original line number Diff line number Diff line 
/*

 * 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__ */

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