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  1. 20 7月, 2011 11 次提交
    • K
      xen/pciback: Drop two backends, squash and cleanup some code. · a92336a1
      由 Konrad Rzeszutek Wilk 提交于 
       - Remove the slot and controller controller backend as they
   are not used.
 - Document the find pciback_[read|write]_config_[byte|word|dword]
   to make it easier to find.
 - Collapse the code from conf_space_capability_msi into pciback_ops.c
 - Collapse conf_space_capability_[pm|vpd].c in conf_space_capability.c
   [and remove the conf_space_capability.h file]
 - Rename all visible functions from pciback to xen_pcibk.
 - Rename all the printk/pr_info, etc that use the "pciback" to say
   "xen-pciback".
 - Convert functions that are not referenced outside the code to be
   static to save on name space.
 - Do the same thing for structures that are internal to the driver.
 - Run checkpatch.pl after the renames and fixup its warnings and
   fix any compile errors caused by the variable rename
 - Cleanup any structs that checkpath.pl commented about or just
   look odd.
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      a92336a1
    • K
      xen/pciback: Print out the MSI/MSI-X (PIRQ) values · c288b67b
      由 Konrad Rzeszutek Wilk 提交于 
      If the verbose_request is set (and loglevel high enough), print out
the MSI/MSI-X values that are sent to the guest. This should aid in
debugging issues.
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      c288b67b
    • K
      xen/pciback: Don't setup an fake IRQ handler for SR-IOV devices. · e17ab35f
      由 Konrad Rzeszutek Wilk 提交于 
      If we try to setup an fake IRQ handler for legacy interrupts
for devices that only have MSI-X (most if not all SR-IOV cards),
we will fail with this:

pciback[0000:01:10.0]: failed to install fake IRQ handler for IRQ 0! (rc:-38)

Since those cards don't have anything in dev->irq.
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      e17ab35f
    • I
      xen: rename pciback module to xen-pciback. · a0b2fa8e
      由 Ian Campbell 提交于 
      pciback is rather generic for a modular distro style kernel.
Signed-off-by: NIan Campbell <ian.campbell@citrix.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
      a0b2fa8e
    • K
      xen/pciback: Fine-grain the spinlocks and fix BUG: scheduling while atomic cases. · 494ef20d
      由 Konrad Rzeszutek Wilk 提交于 
      We were using coarse spinlocks that could end up with a deadlock.
This patch fixes that and makes the spinlocks much more fine-grained.

We also drop be->watchding state spinlocks as they are already
guarded by the xenwatch_thread against multiple customers. Without
that we would trigger the BUG: scheduling while atomic.
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      494ef20d
    • K
      xen/pciback: Allocate IRQ handler for device that is shared with guest. · 0513fe9e
      由 Konrad Rzeszutek Wilk 提交于 
      If the device that is to be shared with a guest is a level device and
the IRQ is shared with the initial domain we need to take actions.
Mainly we install a dummy IRQ handler that will ACK on the interrupt
line so as to not have the initial domain disable the interrupt line.

This dummy IRQ handler is not enabled when the device MSI/MSI-X lines
are set, nor for edge interrupts. And also not for level interrupts
that are not shared amongst devices. Lastly, if the user passes
to the guest all of the PCI devices on the shared line the we won't
install the dummy handler either.

There is also SysFS instrumentation to check its state and turn
IRQ ACKing on/off if necessary.
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      0513fe9e
    • K
      xen/pciback: Disable MSI/MSI-X when reseting a device · a2be65fd
      由 Konrad Rzeszutek Wilk 提交于 
      In cases where the guest is abruptly killed and has not disabled
MSI/MSI-X interrupts we want to do it for it.

Otherwise when the guest is started up and enables MSI, we would
get a WARN() that the device already had been enabled.
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      a2be65fd
    • Z
      xen/pciback: guest SR-IOV support for PV guest · fd5b221b
      由 Zhao, Yu 提交于 
      These changes are for PV guest to use Virtual Function. Because the VF's
vendor, device registers in cfg space are 0xffff, which are invalid and
ignored by PCI device scan. Values in 'struct pci_dev' are fixed up by
SR-IOV code, and using these values will present correct VID and DID to
PV guest kernel.

And command registers in the cfg space are read only 0, which means we
have to emulate MMIO enable bit (VF only uses MMIO  resource) so PV
kernel can work properly.
Acked-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      fd5b221b
    • K
      xen/pciback: Register the owner (domain) of the PCI device. · 6221a9b2
      由 Konrad Rzeszutek Wilk 提交于 
      When the front-end and back-end start negotiating we register
the domain that will use the PCI device. Furthermore during shutdown
of guest or unbinding of the PCI device (and unloading of module)
from pciback we unregister the domain owner.
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
      6221a9b2
    • K
      xen/pciback: Cleanup the driver based on checkpatch warnings and errors. · 8bfd4e02
      由 Konrad Rzeszutek Wilk 提交于 
      Checkpatch found some extra warnings and errors. This mega
patch fixes them all in one big swoop. We also spruce
up the pcistub_ids to use DEFINE_PCI_DEVICE_TABLE macro
(suggested by Jan Beulich).
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      8bfd4e02
    • K
      xen/pciback: xen pci backend driver. · 30edc14b
      由 Konrad Rzeszutek Wilk 提交于 
      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: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
      30edc14b
  3. 21 6月, 2011 13 次提交
  5. 20 6月, 2011 16 次提交