# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1265274485 0
# Node ID 729b32b174409a1db9df22493f1d8a29a2ae9d95
# Parent 9fc37faa25a0f816776b968899469aa49ff4a553
VT-d, tools: Intel IGD passthrough 1/2: vendor-specific FLR
Due to FLR capability of IGD is not exposed on some platforms, this
patch uses vendor specific FLR to reset those IGDs.
Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>
---
tools/python/xen/util/pci.py | 83 +++++++++++++++++++++++++++++++++++++++----
1 files changed, 76 insertions(+), 7 deletions(-)
diff -r 9fc37faa25a0 -r 729b32b17440 tools/python/xen/util/pci.py
--- a/tools/python/xen/util/pci.py Thu Feb 04 09:04:33 2010 +0000
+++ b/tools/python/xen/util/pci.py Thu Feb 04 09:08:05 2010 +0000
@@ -19,6 +19,7 @@ from xen.xend import sxp
from xen.xend import sxp
from xen.xend.XendConstants import AUTO_PHP_SLOT
from xen.xend.XendSXPDev import dev_dict_to_sxp
+from xen.xend.XendLogging import log
# for 2.3 compatibility
try:
@@ -93,6 +94,21 @@ PCI_CAP_ID_VENDOR_SPECIFIC_CAP = 0x09
PCI_CAP_ID_VENDOR_SPECIFIC_CAP = 0x09
PCI_CLASS_ID_USB = 0x0c03
PCI_USB_FLRCTRL = 0x4
+
+PCI_DEVICE_ID = 0x02
+PCI_COMMAND = 0x04
+PCI_CLASS_ID_VGA = 0x0300
+
+PCI_DEVICE_ID_IGFX_GM45 = 0x2a42
+PCI_DEVICE_ID_IGFX_EAGLELAKE = 0x2e02
+PCI_DEVICE_ID_IGFX_Q45 = 0x2e12
+PCI_DEVICE_ID_IGFX_G45 = 0x2e22
+PCI_DEVICE_ID_IGFX_G41 = 0x2e32
+
+PCI_CAP_IGFX_CAP09_OFFSET = 0xa4
+PCI_CAP_IGFX_CAP13_OFFSET = 0xa4
+PCI_CAP_IGFX_GDRST = 0X0d
+PCI_CAP_IGFX_GDRST_OFFSET = 0xc0
# The VF of Intel 82599 10GbE Controller
# See http://download.intel.com/design/network/datashts/82599_datasheet.pdf
@@ -831,6 +847,45 @@ class PciDevice:
if not self.do_Dstate_transition():
self.do_vendor_specific_FLR_method()
+ def do_AF_FLR(self, af_pos):
+ ''' use PCI Advanced Capability to do FLR
+ '''
+ (pci_list, cfg_list) = save_pci_conf_space([self.name])
+ self.pci_conf_write8(af_pos + PCI_AF_CTL, PCI_AF_CTL_FLR)
+ time.sleep(0.100)
+ restore_pci_conf_space((pci_list, cfg_list))
+
+ def do_FLR_for_intel_4Series_iGFX(self):
+ af_pos = PCI_CAP_IGFX_CAP13_OFFSET
+ self.do_AF_FLR(af_pos)
+ log.debug("Intel 4 Series iGFX FLR done")
+
+ def do_FLR_for_GM45_iGFX(self):
+ reg32 = self.pci_conf_read32(PCI_CAP_IGFX_CAP09_OFFSET)
+ if ((reg32 >> 16) & 0x000000FF) != 0x06 or \
+ ((reg32 >> 24) & 0x000000F0) != 0x20:
+ return
+
+ self.pci_conf_write8(PCI_CAP_IGFX_GDRST_OFFSET, PCI_CAP_IGFX_GDRST)
+ for i in range(0, 10):
+ time.sleep(0.100)
+ reg8 = self.pci_conf_read8(PCI_CAP_IGFX_GDRST_OFFSET)
+ if (reg8 & 0x01) == 0:
+ break
+ if i == 10:
+ log.debug("Intel iGFX FLR fail on GM45")
+ return
+
+ # This specific reset will hang if the command register does not have
+ # memory space access enabled
+ cmd = self.pci_conf_read16(PCI_COMMAND)
+ self.pci_conf_write16(PCI_COMMAND, (cmd | 0x02))
+ af_pos = PCI_CAP_IGFX_CAP09_OFFSET
+ self.do_AF_FLR(af_pos)
+ self.pci_conf_write16(PCI_COMMAND, cmd)
+
+ log.debug("Intel iGFX FLR on GM45 done")
+
def find_all_the_multi_functions(self):
sysfs_mnt = find_sysfs_mnt()
parentdict = self.find_parent()
@@ -1104,15 +1159,29 @@ class PciDevice:
else:
# For PCI device on host bus, we test "PCI Advanced Capabilities".
if self.bus == 0 and self.pci_af_flr:
- (pci_list, cfg_list) = save_pci_conf_space([self.name])
- # We use Advanced Capability to do FLR.
- pos = self.find_cap_offset(PCI_CAP_ID_AF)
- self.pci_conf_write8(pos + PCI_AF_CTL, PCI_AF_CTL_FLR)
- time.sleep(0.100)
- restore_pci_conf_space((pci_list, cfg_list))
+ af_pos = self.find_cap_offset(PCI_CAP_ID_AF)
+ self.do_AF_FLR(af_pos)
else:
if self.bus == 0:
- self.do_FLR_for_integrated_device()
+ if self.slot == 0x02 and self.func == 0x0:
+ vendor_id = self.pci_conf_read16(PCI_VENDOR_ID)
+ if vendor_id != VENDOR_INTEL:
+ return
+ class_id = self.pci_conf_read16(PCI_CLASS_DEVICE)
+ if class_id != PCI_CLASS_ID_VGA:
+ return
+ device_id = self.pci_conf_read16(PCI_DEVICE_ID)
+ if device_id == PCI_DEVICE_ID_IGFX_GM45:
+ self.do_FLR_for_GM45_iGFX()
+ elif device_id == PCI_DEVICE_ID_IGFX_EAGLELAKE or \
+ device_id == PCI_DEVICE_ID_IGFX_Q45 or \
+ device_id == PCI_DEVICE_ID_IGFX_G45 or \
+ device_id == PCI_DEVICE_ID_IGFX_G41:
+ self.do_FLR_for_intel_4Series_iGFX()
+ else:
+ log.debug("Unknown iGFX device_id:%x", device_id)
+ else:
+ self.do_FLR_for_integrated_device()
else:
devs = self.find_coassigned_pci_devices(False)
# Remove the element 0 which is a bridge
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