xen/pciback: xen pci backend driver.
This is the host side counterpart to the frontend driver in
drivers/pci/xen-pcifront.c. The PV protocol is also implemented by
frontend drivers in other OSes too, such as the BSDs.
The PV protocol is rather simple. There is page shared with the guest,
which has the 'struct xen_pci_sharedinfo' embossed in it. The backend
has a thread that is kicked every-time the structure is changed and
based on the operation field it performs specific tasks:
XEN_PCI_OP_conf_[read|write]:
Read/Write 0xCF8/0xCFC filtered data. (conf_space*.c)
Based on which field is probed, we either enable/disable the PCI
device, change power state, read VPD, etc. The major goal of this
call is to provide a Physical IRQ (PIRQ) to the guest.
The PIRQ is Xen hypervisor global IRQ value irrespective of the IRQ
is tied in to the IO-APIC, or is a vector. For GSI type
interrupts, the PIRQ==GSI holds. For MSI/MSI-X the
PIRQ value != Linux IRQ number (thought PIRQ==vector).
Please note, that with Xen, all interrupts (except those level shared ones)
are injected directly to the guest - there is no host interaction.
XEN_PCI_OP_[enable|disable]_msi[|x] (pciback_ops.c)
Enables/disables the MSI/MSI-X capability of the device. These operations
setup the MSI/MSI-X vectors for the guest and pass them to the frontend.
When the device is activated, the interrupts are directly injected in the
guest without involving the host.
XEN_PCI_OP_aer_[detected|resume|mmio|slotreset]: In case of failure,
perform the appropriate AER commands on the guest. Right now that is
a cop-out - we just kill the guest.
Besides implementing those commands, it can also
- hide a PCI device from the host. When booting up, the user can specify
xen-pciback.hide=(1:0:0)(BDF..) so that host does not try to use the
device.
The driver was lifted from linux-2.6.18.hg tree and fixed up
so that it could compile under v3.0. Per suggestion from Jesse Barnes
moved the driver to drivers/xen/xen-pciback.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-10-13 21:22:20 +00:00
|
|
|
/*
|
|
|
|
* PCI Backend - Provides a Virtual PCI bus (with real devices)
|
|
|
|
* to the frontend
|
|
|
|
*
|
|
|
|
* Author: Ryan Wilson <hap9@epoch.ncsc.mil>
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/list.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/pci.h>
|
|
|
|
#include <linux/spinlock.h>
|
|
|
|
#include "pciback.h"
|
|
|
|
|
|
|
|
#define PCI_SLOT_MAX 32
|
2011-07-19 23:40:51 +00:00
|
|
|
#define DRV_NAME "xen-pciback"
|
xen/pciback: xen pci backend driver.
This is the host side counterpart to the frontend driver in
drivers/pci/xen-pcifront.c. The PV protocol is also implemented by
frontend drivers in other OSes too, such as the BSDs.
The PV protocol is rather simple. There is page shared with the guest,
which has the 'struct xen_pci_sharedinfo' embossed in it. The backend
has a thread that is kicked every-time the structure is changed and
based on the operation field it performs specific tasks:
XEN_PCI_OP_conf_[read|write]:
Read/Write 0xCF8/0xCFC filtered data. (conf_space*.c)
Based on which field is probed, we either enable/disable the PCI
device, change power state, read VPD, etc. The major goal of this
call is to provide a Physical IRQ (PIRQ) to the guest.
The PIRQ is Xen hypervisor global IRQ value irrespective of the IRQ
is tied in to the IO-APIC, or is a vector. For GSI type
interrupts, the PIRQ==GSI holds. For MSI/MSI-X the
PIRQ value != Linux IRQ number (thought PIRQ==vector).
Please note, that with Xen, all interrupts (except those level shared ones)
are injected directly to the guest - there is no host interaction.
XEN_PCI_OP_[enable|disable]_msi[|x] (pciback_ops.c)
Enables/disables the MSI/MSI-X capability of the device. These operations
setup the MSI/MSI-X vectors for the guest and pass them to the frontend.
When the device is activated, the interrupts are directly injected in the
guest without involving the host.
XEN_PCI_OP_aer_[detected|resume|mmio|slotreset]: In case of failure,
perform the appropriate AER commands on the guest. Right now that is
a cop-out - we just kill the guest.
Besides implementing those commands, it can also
- hide a PCI device from the host. When booting up, the user can specify
xen-pciback.hide=(1:0:0)(BDF..) so that host does not try to use the
device.
The driver was lifted from linux-2.6.18.hg tree and fixed up
so that it could compile under v3.0. Per suggestion from Jesse Barnes
moved the driver to drivers/xen/xen-pciback.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-10-13 21:22:20 +00:00
|
|
|
|
|
|
|
struct vpci_dev_data {
|
|
|
|
/* Access to dev_list must be protected by lock */
|
|
|
|
struct list_head dev_list[PCI_SLOT_MAX];
|
|
|
|
spinlock_t lock;
|
|
|
|
};
|
|
|
|
|
|
|
|
static inline struct list_head *list_first(struct list_head *head)
|
|
|
|
{
|
|
|
|
return head->next;
|
|
|
|
}
|
|
|
|
|
2011-07-19 23:40:51 +00:00
|
|
|
struct pci_dev *xen_pcibk_get_pci_dev(struct xen_pcibk_device *pdev,
|
|
|
|
unsigned int domain, unsigned int bus,
|
|
|
|
unsigned int devfn)
|
xen/pciback: xen pci backend driver.
This is the host side counterpart to the frontend driver in
drivers/pci/xen-pcifront.c. The PV protocol is also implemented by
frontend drivers in other OSes too, such as the BSDs.
The PV protocol is rather simple. There is page shared with the guest,
which has the 'struct xen_pci_sharedinfo' embossed in it. The backend
has a thread that is kicked every-time the structure is changed and
based on the operation field it performs specific tasks:
XEN_PCI_OP_conf_[read|write]:
Read/Write 0xCF8/0xCFC filtered data. (conf_space*.c)
Based on which field is probed, we either enable/disable the PCI
device, change power state, read VPD, etc. The major goal of this
call is to provide a Physical IRQ (PIRQ) to the guest.
The PIRQ is Xen hypervisor global IRQ value irrespective of the IRQ
is tied in to the IO-APIC, or is a vector. For GSI type
interrupts, the PIRQ==GSI holds. For MSI/MSI-X the
PIRQ value != Linux IRQ number (thought PIRQ==vector).
Please note, that with Xen, all interrupts (except those level shared ones)
are injected directly to the guest - there is no host interaction.
XEN_PCI_OP_[enable|disable]_msi[|x] (pciback_ops.c)
Enables/disables the MSI/MSI-X capability of the device. These operations
setup the MSI/MSI-X vectors for the guest and pass them to the frontend.
When the device is activated, the interrupts are directly injected in the
guest without involving the host.
XEN_PCI_OP_aer_[detected|resume|mmio|slotreset]: In case of failure,
perform the appropriate AER commands on the guest. Right now that is
a cop-out - we just kill the guest.
Besides implementing those commands, it can also
- hide a PCI device from the host. When booting up, the user can specify
xen-pciback.hide=(1:0:0)(BDF..) so that host does not try to use the
device.
The driver was lifted from linux-2.6.18.hg tree and fixed up
so that it could compile under v3.0. Per suggestion from Jesse Barnes
moved the driver to drivers/xen/xen-pciback.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-10-13 21:22:20 +00:00
|
|
|
{
|
|
|
|
struct pci_dev_entry *entry;
|
|
|
|
struct pci_dev *dev = NULL;
|
|
|
|
struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
if (domain != 0 || bus != 0)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
if (PCI_SLOT(devfn) < PCI_SLOT_MAX) {
|
|
|
|
spin_lock_irqsave(&vpci_dev->lock, flags);
|
|
|
|
|
|
|
|
list_for_each_entry(entry,
|
|
|
|
&vpci_dev->dev_list[PCI_SLOT(devfn)],
|
|
|
|
list) {
|
|
|
|
if (PCI_FUNC(entry->dev->devfn) == PCI_FUNC(devfn)) {
|
|
|
|
dev = entry->dev;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&vpci_dev->lock, flags);
|
|
|
|
}
|
|
|
|
return dev;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int match_slot(struct pci_dev *l, struct pci_dev *r)
|
|
|
|
{
|
|
|
|
if (pci_domain_nr(l->bus) == pci_domain_nr(r->bus)
|
|
|
|
&& l->bus == r->bus && PCI_SLOT(l->devfn) == PCI_SLOT(r->devfn))
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-07-19 23:40:51 +00:00
|
|
|
int xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev, struct pci_dev *dev,
|
|
|
|
int devid, publish_pci_dev_cb publish_cb)
|
xen/pciback: xen pci backend driver.
This is the host side counterpart to the frontend driver in
drivers/pci/xen-pcifront.c. The PV protocol is also implemented by
frontend drivers in other OSes too, such as the BSDs.
The PV protocol is rather simple. There is page shared with the guest,
which has the 'struct xen_pci_sharedinfo' embossed in it. The backend
has a thread that is kicked every-time the structure is changed and
based on the operation field it performs specific tasks:
XEN_PCI_OP_conf_[read|write]:
Read/Write 0xCF8/0xCFC filtered data. (conf_space*.c)
Based on which field is probed, we either enable/disable the PCI
device, change power state, read VPD, etc. The major goal of this
call is to provide a Physical IRQ (PIRQ) to the guest.
The PIRQ is Xen hypervisor global IRQ value irrespective of the IRQ
is tied in to the IO-APIC, or is a vector. For GSI type
interrupts, the PIRQ==GSI holds. For MSI/MSI-X the
PIRQ value != Linux IRQ number (thought PIRQ==vector).
Please note, that with Xen, all interrupts (except those level shared ones)
are injected directly to the guest - there is no host interaction.
XEN_PCI_OP_[enable|disable]_msi[|x] (pciback_ops.c)
Enables/disables the MSI/MSI-X capability of the device. These operations
setup the MSI/MSI-X vectors for the guest and pass them to the frontend.
When the device is activated, the interrupts are directly injected in the
guest without involving the host.
XEN_PCI_OP_aer_[detected|resume|mmio|slotreset]: In case of failure,
perform the appropriate AER commands on the guest. Right now that is
a cop-out - we just kill the guest.
Besides implementing those commands, it can also
- hide a PCI device from the host. When booting up, the user can specify
xen-pciback.hide=(1:0:0)(BDF..) so that host does not try to use the
device.
The driver was lifted from linux-2.6.18.hg tree and fixed up
so that it could compile under v3.0. Per suggestion from Jesse Barnes
moved the driver to drivers/xen/xen-pciback.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-10-13 21:22:20 +00:00
|
|
|
{
|
|
|
|
int err = 0, slot, func = -1;
|
|
|
|
struct pci_dev_entry *t, *dev_entry;
|
|
|
|
struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
if ((dev->class >> 24) == PCI_BASE_CLASS_BRIDGE) {
|
|
|
|
err = -EFAULT;
|
|
|
|
xenbus_dev_fatal(pdev->xdev, err,
|
|
|
|
"Can't export bridges on the virtual PCI bus");
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev_entry = kmalloc(sizeof(*dev_entry), GFP_KERNEL);
|
|
|
|
if (!dev_entry) {
|
|
|
|
err = -ENOMEM;
|
|
|
|
xenbus_dev_fatal(pdev->xdev, err,
|
|
|
|
"Error adding entry to virtual PCI bus");
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev_entry->dev = dev;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&vpci_dev->lock, flags);
|
|
|
|
|
|
|
|
/* Keep multi-function devices together on the virtual PCI bus */
|
|
|
|
for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
|
|
|
|
if (!list_empty(&vpci_dev->dev_list[slot])) {
|
|
|
|
t = list_entry(list_first(&vpci_dev->dev_list[slot]),
|
|
|
|
struct pci_dev_entry, list);
|
|
|
|
|
|
|
|
if (match_slot(dev, t->dev)) {
|
2011-07-19 23:40:51 +00:00
|
|
|
pr_info(DRV_NAME ": vpci: %s: "
|
xen/pciback: xen pci backend driver.
This is the host side counterpart to the frontend driver in
drivers/pci/xen-pcifront.c. The PV protocol is also implemented by
frontend drivers in other OSes too, such as the BSDs.
The PV protocol is rather simple. There is page shared with the guest,
which has the 'struct xen_pci_sharedinfo' embossed in it. The backend
has a thread that is kicked every-time the structure is changed and
based on the operation field it performs specific tasks:
XEN_PCI_OP_conf_[read|write]:
Read/Write 0xCF8/0xCFC filtered data. (conf_space*.c)
Based on which field is probed, we either enable/disable the PCI
device, change power state, read VPD, etc. The major goal of this
call is to provide a Physical IRQ (PIRQ) to the guest.
The PIRQ is Xen hypervisor global IRQ value irrespective of the IRQ
is tied in to the IO-APIC, or is a vector. For GSI type
interrupts, the PIRQ==GSI holds. For MSI/MSI-X the
PIRQ value != Linux IRQ number (thought PIRQ==vector).
Please note, that with Xen, all interrupts (except those level shared ones)
are injected directly to the guest - there is no host interaction.
XEN_PCI_OP_[enable|disable]_msi[|x] (pciback_ops.c)
Enables/disables the MSI/MSI-X capability of the device. These operations
setup the MSI/MSI-X vectors for the guest and pass them to the frontend.
When the device is activated, the interrupts are directly injected in the
guest without involving the host.
XEN_PCI_OP_aer_[detected|resume|mmio|slotreset]: In case of failure,
perform the appropriate AER commands on the guest. Right now that is
a cop-out - we just kill the guest.
Besides implementing those commands, it can also
- hide a PCI device from the host. When booting up, the user can specify
xen-pciback.hide=(1:0:0)(BDF..) so that host does not try to use the
device.
The driver was lifted from linux-2.6.18.hg tree and fixed up
so that it could compile under v3.0. Per suggestion from Jesse Barnes
moved the driver to drivers/xen/xen-pciback.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-10-13 21:22:20 +00:00
|
|
|
"assign to virtual slot %d func %d\n",
|
|
|
|
pci_name(dev), slot,
|
|
|
|
PCI_FUNC(dev->devfn));
|
|
|
|
list_add_tail(&dev_entry->list,
|
|
|
|
&vpci_dev->dev_list[slot]);
|
|
|
|
func = PCI_FUNC(dev->devfn);
|
|
|
|
goto unlock;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Assign to a new slot on the virtual PCI bus */
|
|
|
|
for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
|
|
|
|
if (list_empty(&vpci_dev->dev_list[slot])) {
|
2011-07-19 23:40:51 +00:00
|
|
|
printk(KERN_INFO DRV_NAME
|
|
|
|
": vpci: %s: assign to virtual slot %d\n",
|
xen/pciback: xen pci backend driver.
This is the host side counterpart to the frontend driver in
drivers/pci/xen-pcifront.c. The PV protocol is also implemented by
frontend drivers in other OSes too, such as the BSDs.
The PV protocol is rather simple. There is page shared with the guest,
which has the 'struct xen_pci_sharedinfo' embossed in it. The backend
has a thread that is kicked every-time the structure is changed and
based on the operation field it performs specific tasks:
XEN_PCI_OP_conf_[read|write]:
Read/Write 0xCF8/0xCFC filtered data. (conf_space*.c)
Based on which field is probed, we either enable/disable the PCI
device, change power state, read VPD, etc. The major goal of this
call is to provide a Physical IRQ (PIRQ) to the guest.
The PIRQ is Xen hypervisor global IRQ value irrespective of the IRQ
is tied in to the IO-APIC, or is a vector. For GSI type
interrupts, the PIRQ==GSI holds. For MSI/MSI-X the
PIRQ value != Linux IRQ number (thought PIRQ==vector).
Please note, that with Xen, all interrupts (except those level shared ones)
are injected directly to the guest - there is no host interaction.
XEN_PCI_OP_[enable|disable]_msi[|x] (pciback_ops.c)
Enables/disables the MSI/MSI-X capability of the device. These operations
setup the MSI/MSI-X vectors for the guest and pass them to the frontend.
When the device is activated, the interrupts are directly injected in the
guest without involving the host.
XEN_PCI_OP_aer_[detected|resume|mmio|slotreset]: In case of failure,
perform the appropriate AER commands on the guest. Right now that is
a cop-out - we just kill the guest.
Besides implementing those commands, it can also
- hide a PCI device from the host. When booting up, the user can specify
xen-pciback.hide=(1:0:0)(BDF..) so that host does not try to use the
device.
The driver was lifted from linux-2.6.18.hg tree and fixed up
so that it could compile under v3.0. Per suggestion from Jesse Barnes
moved the driver to drivers/xen/xen-pciback.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-10-13 21:22:20 +00:00
|
|
|
pci_name(dev), slot);
|
|
|
|
list_add_tail(&dev_entry->list,
|
|
|
|
&vpci_dev->dev_list[slot]);
|
|
|
|
func = PCI_FUNC(dev->devfn);
|
|
|
|
goto unlock;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
err = -ENOMEM;
|
|
|
|
xenbus_dev_fatal(pdev->xdev, err,
|
|
|
|
"No more space on root virtual PCI bus");
|
|
|
|
|
|
|
|
unlock:
|
|
|
|
spin_unlock_irqrestore(&vpci_dev->lock, flags);
|
|
|
|
|
|
|
|
/* Publish this device. */
|
|
|
|
if (!err)
|
|
|
|
err = publish_cb(pdev, 0, 0, PCI_DEVFN(slot, func), devid);
|
|
|
|
|
|
|
|
out:
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2011-07-19 23:40:51 +00:00
|
|
|
void xen_pcibk_release_pci_dev(struct xen_pcibk_device *pdev,
|
|
|
|
struct pci_dev *dev)
|
xen/pciback: xen pci backend driver.
This is the host side counterpart to the frontend driver in
drivers/pci/xen-pcifront.c. The PV protocol is also implemented by
frontend drivers in other OSes too, such as the BSDs.
The PV protocol is rather simple. There is page shared with the guest,
which has the 'struct xen_pci_sharedinfo' embossed in it. The backend
has a thread that is kicked every-time the structure is changed and
based on the operation field it performs specific tasks:
XEN_PCI_OP_conf_[read|write]:
Read/Write 0xCF8/0xCFC filtered data. (conf_space*.c)
Based on which field is probed, we either enable/disable the PCI
device, change power state, read VPD, etc. The major goal of this
call is to provide a Physical IRQ (PIRQ) to the guest.
The PIRQ is Xen hypervisor global IRQ value irrespective of the IRQ
is tied in to the IO-APIC, or is a vector. For GSI type
interrupts, the PIRQ==GSI holds. For MSI/MSI-X the
PIRQ value != Linux IRQ number (thought PIRQ==vector).
Please note, that with Xen, all interrupts (except those level shared ones)
are injected directly to the guest - there is no host interaction.
XEN_PCI_OP_[enable|disable]_msi[|x] (pciback_ops.c)
Enables/disables the MSI/MSI-X capability of the device. These operations
setup the MSI/MSI-X vectors for the guest and pass them to the frontend.
When the device is activated, the interrupts are directly injected in the
guest without involving the host.
XEN_PCI_OP_aer_[detected|resume|mmio|slotreset]: In case of failure,
perform the appropriate AER commands on the guest. Right now that is
a cop-out - we just kill the guest.
Besides implementing those commands, it can also
- hide a PCI device from the host. When booting up, the user can specify
xen-pciback.hide=(1:0:0)(BDF..) so that host does not try to use the
device.
The driver was lifted from linux-2.6.18.hg tree and fixed up
so that it could compile under v3.0. Per suggestion from Jesse Barnes
moved the driver to drivers/xen/xen-pciback.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-10-13 21:22:20 +00:00
|
|
|
{
|
|
|
|
int slot;
|
|
|
|
struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
|
|
|
|
struct pci_dev *found_dev = NULL;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&vpci_dev->lock, flags);
|
|
|
|
|
|
|
|
for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
|
|
|
|
struct pci_dev_entry *e, *tmp;
|
|
|
|
list_for_each_entry_safe(e, tmp, &vpci_dev->dev_list[slot],
|
|
|
|
list) {
|
|
|
|
if (e->dev == dev) {
|
|
|
|
list_del(&e->list);
|
|
|
|
found_dev = e->dev;
|
|
|
|
kfree(e);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
spin_unlock_irqrestore(&vpci_dev->lock, flags);
|
|
|
|
|
|
|
|
if (found_dev)
|
|
|
|
pcistub_put_pci_dev(found_dev);
|
|
|
|
}
|
|
|
|
|
2011-07-19 23:40:51 +00:00
|
|
|
int xen_pcibk_init_devices(struct xen_pcibk_device *pdev)
|
xen/pciback: xen pci backend driver.
This is the host side counterpart to the frontend driver in
drivers/pci/xen-pcifront.c. The PV protocol is also implemented by
frontend drivers in other OSes too, such as the BSDs.
The PV protocol is rather simple. There is page shared with the guest,
which has the 'struct xen_pci_sharedinfo' embossed in it. The backend
has a thread that is kicked every-time the structure is changed and
based on the operation field it performs specific tasks:
XEN_PCI_OP_conf_[read|write]:
Read/Write 0xCF8/0xCFC filtered data. (conf_space*.c)
Based on which field is probed, we either enable/disable the PCI
device, change power state, read VPD, etc. The major goal of this
call is to provide a Physical IRQ (PIRQ) to the guest.
The PIRQ is Xen hypervisor global IRQ value irrespective of the IRQ
is tied in to the IO-APIC, or is a vector. For GSI type
interrupts, the PIRQ==GSI holds. For MSI/MSI-X the
PIRQ value != Linux IRQ number (thought PIRQ==vector).
Please note, that with Xen, all interrupts (except those level shared ones)
are injected directly to the guest - there is no host interaction.
XEN_PCI_OP_[enable|disable]_msi[|x] (pciback_ops.c)
Enables/disables the MSI/MSI-X capability of the device. These operations
setup the MSI/MSI-X vectors for the guest and pass them to the frontend.
When the device is activated, the interrupts are directly injected in the
guest without involving the host.
XEN_PCI_OP_aer_[detected|resume|mmio|slotreset]: In case of failure,
perform the appropriate AER commands on the guest. Right now that is
a cop-out - we just kill the guest.
Besides implementing those commands, it can also
- hide a PCI device from the host. When booting up, the user can specify
xen-pciback.hide=(1:0:0)(BDF..) so that host does not try to use the
device.
The driver was lifted from linux-2.6.18.hg tree and fixed up
so that it could compile under v3.0. Per suggestion from Jesse Barnes
moved the driver to drivers/xen/xen-pciback.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-10-13 21:22:20 +00:00
|
|
|
{
|
|
|
|
int slot;
|
|
|
|
struct vpci_dev_data *vpci_dev;
|
|
|
|
|
|
|
|
vpci_dev = kmalloc(sizeof(*vpci_dev), GFP_KERNEL);
|
|
|
|
if (!vpci_dev)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
spin_lock_init(&vpci_dev->lock);
|
|
|
|
|
|
|
|
for (slot = 0; slot < PCI_SLOT_MAX; slot++)
|
|
|
|
INIT_LIST_HEAD(&vpci_dev->dev_list[slot]);
|
|
|
|
|
|
|
|
pdev->pci_dev_data = vpci_dev;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-07-19 23:40:51 +00:00
|
|
|
int xen_pcibk_publish_pci_roots(struct xen_pcibk_device *pdev,
|
|
|
|
publish_pci_root_cb publish_cb)
|
xen/pciback: xen pci backend driver.
This is the host side counterpart to the frontend driver in
drivers/pci/xen-pcifront.c. The PV protocol is also implemented by
frontend drivers in other OSes too, such as the BSDs.
The PV protocol is rather simple. There is page shared with the guest,
which has the 'struct xen_pci_sharedinfo' embossed in it. The backend
has a thread that is kicked every-time the structure is changed and
based on the operation field it performs specific tasks:
XEN_PCI_OP_conf_[read|write]:
Read/Write 0xCF8/0xCFC filtered data. (conf_space*.c)
Based on which field is probed, we either enable/disable the PCI
device, change power state, read VPD, etc. The major goal of this
call is to provide a Physical IRQ (PIRQ) to the guest.
The PIRQ is Xen hypervisor global IRQ value irrespective of the IRQ
is tied in to the IO-APIC, or is a vector. For GSI type
interrupts, the PIRQ==GSI holds. For MSI/MSI-X the
PIRQ value != Linux IRQ number (thought PIRQ==vector).
Please note, that with Xen, all interrupts (except those level shared ones)
are injected directly to the guest - there is no host interaction.
XEN_PCI_OP_[enable|disable]_msi[|x] (pciback_ops.c)
Enables/disables the MSI/MSI-X capability of the device. These operations
setup the MSI/MSI-X vectors for the guest and pass them to the frontend.
When the device is activated, the interrupts are directly injected in the
guest without involving the host.
XEN_PCI_OP_aer_[detected|resume|mmio|slotreset]: In case of failure,
perform the appropriate AER commands on the guest. Right now that is
a cop-out - we just kill the guest.
Besides implementing those commands, it can also
- hide a PCI device from the host. When booting up, the user can specify
xen-pciback.hide=(1:0:0)(BDF..) so that host does not try to use the
device.
The driver was lifted from linux-2.6.18.hg tree and fixed up
so that it could compile under v3.0. Per suggestion from Jesse Barnes
moved the driver to drivers/xen/xen-pciback.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-10-13 21:22:20 +00:00
|
|
|
{
|
|
|
|
/* The Virtual PCI bus has only one root */
|
|
|
|
return publish_cb(pdev, 0, 0);
|
|
|
|
}
|
|
|
|
|
2011-07-19 23:40:51 +00:00
|
|
|
void xen_pcibk_release_devices(struct xen_pcibk_device *pdev)
|
xen/pciback: xen pci backend driver.
This is the host side counterpart to the frontend driver in
drivers/pci/xen-pcifront.c. The PV protocol is also implemented by
frontend drivers in other OSes too, such as the BSDs.
The PV protocol is rather simple. There is page shared with the guest,
which has the 'struct xen_pci_sharedinfo' embossed in it. The backend
has a thread that is kicked every-time the structure is changed and
based on the operation field it performs specific tasks:
XEN_PCI_OP_conf_[read|write]:
Read/Write 0xCF8/0xCFC filtered data. (conf_space*.c)
Based on which field is probed, we either enable/disable the PCI
device, change power state, read VPD, etc. The major goal of this
call is to provide a Physical IRQ (PIRQ) to the guest.
The PIRQ is Xen hypervisor global IRQ value irrespective of the IRQ
is tied in to the IO-APIC, or is a vector. For GSI type
interrupts, the PIRQ==GSI holds. For MSI/MSI-X the
PIRQ value != Linux IRQ number (thought PIRQ==vector).
Please note, that with Xen, all interrupts (except those level shared ones)
are injected directly to the guest - there is no host interaction.
XEN_PCI_OP_[enable|disable]_msi[|x] (pciback_ops.c)
Enables/disables the MSI/MSI-X capability of the device. These operations
setup the MSI/MSI-X vectors for the guest and pass them to the frontend.
When the device is activated, the interrupts are directly injected in the
guest without involving the host.
XEN_PCI_OP_aer_[detected|resume|mmio|slotreset]: In case of failure,
perform the appropriate AER commands on the guest. Right now that is
a cop-out - we just kill the guest.
Besides implementing those commands, it can also
- hide a PCI device from the host. When booting up, the user can specify
xen-pciback.hide=(1:0:0)(BDF..) so that host does not try to use the
device.
The driver was lifted from linux-2.6.18.hg tree and fixed up
so that it could compile under v3.0. Per suggestion from Jesse Barnes
moved the driver to drivers/xen/xen-pciback.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-10-13 21:22:20 +00:00
|
|
|
{
|
|
|
|
int slot;
|
|
|
|
struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
|
|
|
|
|
|
|
|
for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
|
|
|
|
struct pci_dev_entry *e, *tmp;
|
|
|
|
list_for_each_entry_safe(e, tmp, &vpci_dev->dev_list[slot],
|
|
|
|
list) {
|
|
|
|
list_del(&e->list);
|
|
|
|
pcistub_put_pci_dev(e->dev);
|
|
|
|
kfree(e);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
kfree(vpci_dev);
|
|
|
|
pdev->pci_dev_data = NULL;
|
|
|
|
}
|
|
|
|
|
2011-07-19 23:40:51 +00:00
|
|
|
int xen_pcibk_get_pcifront_dev(struct pci_dev *pcidev,
|
|
|
|
struct xen_pcibk_device *pdev,
|
|
|
|
unsigned int *domain, unsigned int *bus,
|
|
|
|
unsigned int *devfn)
|
xen/pciback: xen pci backend driver.
This is the host side counterpart to the frontend driver in
drivers/pci/xen-pcifront.c. The PV protocol is also implemented by
frontend drivers in other OSes too, such as the BSDs.
The PV protocol is rather simple. There is page shared with the guest,
which has the 'struct xen_pci_sharedinfo' embossed in it. The backend
has a thread that is kicked every-time the structure is changed and
based on the operation field it performs specific tasks:
XEN_PCI_OP_conf_[read|write]:
Read/Write 0xCF8/0xCFC filtered data. (conf_space*.c)
Based on which field is probed, we either enable/disable the PCI
device, change power state, read VPD, etc. The major goal of this
call is to provide a Physical IRQ (PIRQ) to the guest.
The PIRQ is Xen hypervisor global IRQ value irrespective of the IRQ
is tied in to the IO-APIC, or is a vector. For GSI type
interrupts, the PIRQ==GSI holds. For MSI/MSI-X the
PIRQ value != Linux IRQ number (thought PIRQ==vector).
Please note, that with Xen, all interrupts (except those level shared ones)
are injected directly to the guest - there is no host interaction.
XEN_PCI_OP_[enable|disable]_msi[|x] (pciback_ops.c)
Enables/disables the MSI/MSI-X capability of the device. These operations
setup the MSI/MSI-X vectors for the guest and pass them to the frontend.
When the device is activated, the interrupts are directly injected in the
guest without involving the host.
XEN_PCI_OP_aer_[detected|resume|mmio|slotreset]: In case of failure,
perform the appropriate AER commands on the guest. Right now that is
a cop-out - we just kill the guest.
Besides implementing those commands, it can also
- hide a PCI device from the host. When booting up, the user can specify
xen-pciback.hide=(1:0:0)(BDF..) so that host does not try to use the
device.
The driver was lifted from linux-2.6.18.hg tree and fixed up
so that it could compile under v3.0. Per suggestion from Jesse Barnes
moved the driver to drivers/xen/xen-pciback.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-10-13 21:22:20 +00:00
|
|
|
{
|
|
|
|
struct pci_dev_entry *entry;
|
|
|
|
struct pci_dev *dev = NULL;
|
|
|
|
struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
|
|
|
|
unsigned long flags;
|
|
|
|
int found = 0, slot;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&vpci_dev->lock, flags);
|
|
|
|
for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
|
|
|
|
list_for_each_entry(entry,
|
|
|
|
&vpci_dev->dev_list[slot],
|
|
|
|
list) {
|
|
|
|
dev = entry->dev;
|
|
|
|
if (dev && dev->bus->number == pcidev->bus->number
|
|
|
|
&& pci_domain_nr(dev->bus) ==
|
|
|
|
pci_domain_nr(pcidev->bus)
|
|
|
|
&& dev->devfn == pcidev->devfn) {
|
|
|
|
found = 1;
|
|
|
|
*domain = 0;
|
|
|
|
*bus = 0;
|
|
|
|
*devfn = PCI_DEVFN(slot,
|
|
|
|
PCI_FUNC(pcidev->devfn));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&vpci_dev->lock, flags);
|
|
|
|
return found;
|
|
|
|
}
|