* [dpdk-dev] dpdk-devbind can't be used misc with kernel tools
@ 2017-04-26 6:19 Tu, LijuanX A
2017-04-26 9:26 ` Prathyusha, Guduri
0 siblings, 1 reply; 5+ messages in thread
From: Tu, LijuanX A @ 2017-04-26 6:19 UTC (permalink / raw)
To: gprathyusha
Cc: dev, Chen, WeichunX, Liu, Yu Y, Xu, Qian Q, Liu, Yong, Lu, PeipeiX
Hi Guduri,
I am a tester from intel dpdk team. I get a issues on usertools/dpdk-devbind.py
With the usertools/dpdk-devbind.py , I can't bind driver as expect.
I use the "dpdk-devbind.py" bind pci to igb_uio, then I using kernel tools bind pci to ixgbe,
I can bind pci to igb_uio successfully ,but it bind back to ixgbe failed..
Bind pci to igb_uio and then bind to ixgbe ,both use "dpdk-devbind.py", it works well.
Could you . have a look at this as soon as possible ,it block the daily regression test.
Thank you very much.
There are my test env and steps:
dpdk commit eba33e87ad37626604be7186e746751f99691084
Components: usertools/dpdk-devbind.py
kernel: 4.8.6-300.fc25.x86_64
driver: ixgbe
version: 5.0.4
firmware-version: 0x61bf0001
Expect: we can use dpdk-devbind.py to bind or unbind PCI-device, we also can use kernel tools to bind or unbind PCI-device, such as :
steps:
# ./dpdk-devbind.py --bind=igb_uio 0000:05:00.0
status:
0000:05:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb' drv=igb_uio unused=
# echo "8086 10fd" >/sys/bus/pci/drivers/ixgbe/new_id
# echo "0000:05:00.0" >/sys/bus/pci/devices/0000\:05\:00.0/driver/unbind
# echo "0000:05:00.0" >/sys/bus/pci/drivers/ixgbe/
# echo "0000:05:00.0" >/sys/bus/pci/drivers/ixgbe/bind
-bash: echo: write error: No such device
status
0000:05:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection' unused=ixgbe,igb_uio
Result:
It can't bind to ixgbe, expect it can bind to ixgbe.
I think the related commit are ::
commit 2fc3502935700243d9a6d903166e6fd11e429843
Author: Guduri Prathyusha <gprathyusha@caviumnetworks.com>
Date: Wed Mar 22 19:41:29 2017 +0530
usertools: use optimized driver override scheme to bind
commit c3ce205d5729867bd1c4c4429a80e01a528d5905
Author: Guduri Prathyusha <gprathyusha@caviumnetworks.com>
Date: Wed Mar 22 19:41:28 2017 +0530
usertools: optimize lspci invocation
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-dev] dpdk-devbind can't be used misc with kernel tools
2017-04-26 6:19 [dpdk-dev] dpdk-devbind can't be used misc with kernel tools Tu, LijuanX A
@ 2017-04-26 9:26 ` Prathyusha, Guduri
2017-04-27 6:42 ` Tu, LijuanX A
2017-04-27 7:16 ` Tu, LijuanX A
0 siblings, 2 replies; 5+ messages in thread
From: Prathyusha, Guduri @ 2017-04-26 9:26 UTC (permalink / raw)
To: Tu, LijuanX A
Cc: dev, Chen, WeichunX, Liu, Yu Y, Xu, Qian Q, Liu, Yong, Lu, PeipeiX
Hi LijuanX A
Response inline...
Kindly apply the patch below (inline) and let me know the result. I will submit a formal patch once you confirm.
Thanks,
Prathyusha
From: Tu, LijuanX A <lijuanx.a.tu@intel.com>
Sent: Wednesday, April 26, 2017 11:49 AM
To: Prathyusha, Guduri
Cc: dev@dpdk.org; Chen, WeichunX; Liu, Yu Y; Xu, Qian Q; Liu, Yong; Lu, PeipeiX
Subject: dpdk-devbind can't be used misc with kernel tools
Hi Guduri,
I am a tester from intel dpdk team. I get a issues on usertools/dpdk-devbind.py
With the usertools/dpdk-devbind.py , I can’t bind driver as expect.
I use the “dpdk-devbind.py” bind pci to igb_uio, then I using kernel tools bind pci to ixgbe,
I can bind pci to igb_uio successfully ,but it bind back to ixgbe failed..
/sys/bus/pci/devices/xxxxxx/driver_override is used to bind and unbind devices to drivers in kernels >= 3.15
driver_override must be written to null for a device to bind to a driver. In the current script, null is written before unbinding a device.
Hence when you bind a device using script and unbind using kernel tools (/sys/bus/pci/drivers/xx/new_id, >>/sys/bus/pci/devices/xx/driver/unbind, /sys/bus/pci/drivers/xx/bind), driver_override is still set to the previous driver.
To avoid this, writing null to driver_override after binding a device to a driver. This will let the kernel tools unbind after binding using the dpdk script.
Bind pci to igb_uio and then bind to ixgbe ,both use “dpdk-devbind.py”, it works well.
Could you . have a look at this as soon as possible ,it block the daily regression test.
Thank you very much.
Here is the patch to be applied
diff --git a/usertools/dpdk-devbind.py b/usertools/dpdk-devbind.py
index bb4d536e0..1dc1065b1 100755
--- a/usertools/dpdk-devbind.py
+++ b/usertools/dpdk-devbind.py
@@ -386,25 +386,6 @@ def unbind_one(dev_id, force):
"Skipping unbind" % (dev_id))
return
- # For kernels > 3.15 driver_override is used to bind a device to a driver.
- # Before unbinding it, overwrite driver_override with empty string so that
- # the device can be bound to any other driver
- filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
- if os.path.exists(filename):
- try:
- f = open(filename, "w")
- except:
- print("Error: unbind failed for %s - Cannot open %s"
- % (dev_id, filename))
- sys.exit(1)
- try:
- f.write("\00")
- f.close()
- except:
- print("Error: unbind failed for %s - Cannot open %s"
- % (dev_id, filename))
- sys.exit(1)
-
# write to /sys to unbind
filename = "/sys/bus/pci/drivers/%s/unbind" % dev["Driver_str"]
try:
@@ -507,6 +488,25 @@ def bind_one(dev_id, driver, force):
bind_one(dev_id, saved_driver, force)
return
+ # For kernels > 3.15 driver_override is used to bind a device to a driver.
+ # Before unbinding it, overwrite driver_override with empty string so that
+ # the device can be bound to any other driver
+ filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
+ if os.path.exists(filename):
+ try:
+ f = open(filename, "w")
+ except:
+ print("Error: unbind failed for %s - Cannot open %s"
+ % (dev_id, filename))
+ sys.exit(1)
+ try:
+ f.write("\00")
+ f.close()
+ except:
+ print("Error: unbind failed for %s - Cannot open %s"
+ % (dev_id, filename))
+ sys.exit(1)
+
def unbind_all(dev_list, force=False):
"""Unbind method, takes a list of device locations"""
There are my test env and steps:
dpdk commit eba33e87ad37626604be7186e746751f99691084
Components: usertools/dpdk-devbind.py
kernel: 4.8.6-300.fc25.x86_64
driver: ixgbe
version: 5.0.4
firmware-version: 0x61bf0001
Expect: we can use dpdk-devbind.py to bind or unbind PCI-device, we also can use kernel tools to bind or unbind PCI-device, such as :
steps:
# ./dpdk-devbind.py --bind=igb_uio 0000:05:00.0
status:
0000:05:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb' drv=igb_uio unused=
# echo "8086 10fd" >/sys/bus/pci/drivers/ixgbe/new_id
# echo "0000:05:00.0" >/sys/bus/pci/devices/0000\:05\:00.0/driver/unbind
# echo "0000:05:00.0" >/sys/bus/pci/drivers/ixgbe/
# echo "0000:05:00.0" >/sys/bus/pci/drivers/ixgbe/bind
-bash: echo: write error: No such device
status
0000:05:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection' unused=ixgbe,igb_uio
Result:
It can't bind to ixgbe, expect it can bind to ixgbe.
I think the related commit are ::
commit 2fc3502935700243d9a6d903166e6fd11e429843
Author: Guduri Prathyusha <gprathyusha@caviumnetworks.com>
Date: Wed Mar 22 19:41:29 2017 +0530
usertools: use optimized driver override scheme to bind
commit c3ce205d5729867bd1c4c4429a80e01a528d5905
Author: Guduri Prathyusha <gprathyusha@caviumnetworks.com>
Date: Wed Mar 22 19:41:28 2017 +0530
usertools: optimize lspci invocation
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-dev] dpdk-devbind can't be used misc with kernel tools
2017-04-26 9:26 ` Prathyusha, Guduri
@ 2017-04-27 6:42 ` Tu, LijuanX A
2017-04-27 7:16 ` Tu, LijuanX A
1 sibling, 0 replies; 5+ messages in thread
From: Tu, LijuanX A @ 2017-04-27 6:42 UTC (permalink / raw)
To: Prathyusha, Guduri
Cc: dev, Chen, WeichunX, Liu, Yu Y, Xu, Qian Q, Liu, Yong, Lu, PeipeiX
Hi Prathyusha,
The path is OK ,I have verified it.
-----Original Message-----
From: Prathyusha, Guduri [mailto:Guduri.Prathyusha@cavium.com]
Sent: Wednesday, April 26, 2017 5:26 PM
To: Tu, LijuanX A
Cc: dev@dpdk.org; Chen, WeichunX; Liu, Yu Y; Xu, Qian Q; Liu, Yong; Lu, PeipeiX
Subject: Re: dpdk-devbind can't be used misc with kernel tools
Hi LijuanX A
Response inline...
Kindly apply the patch below (inline) and let me know the result. I will submit a formal patch once you confirm.
Thanks,
Prathyusha
From: Tu, LijuanX A <lijuanx.a.tu@intel.com>
Sent: Wednesday, April 26, 2017 11:49 AM
To: Prathyusha, Guduri
Cc: dev@dpdk.org; Chen, WeichunX; Liu, Yu Y; Xu, Qian Q; Liu, Yong; Lu, PeipeiX
Subject: dpdk-devbind can't be used misc with kernel tools
Hi Guduri,
I am a tester from intel dpdk team. I get a issues on usertools/dpdk-devbind.py
With the usertools/dpdk-devbind.py , I can't bind driver as expect.
I use the "dpdk-devbind.py" bind pci to igb_uio, then I using kernel tools bind pci to ixgbe, I can bind pci to igb_uio successfully ,but it bind back to ixgbe failed..
/sys/bus/pci/devices/xxxxxx/driver_override is used to bind and unbind devices to drivers in kernels >= 3.15 driver_override must be written to null for a device to bind to a driver. In the current script, null is written before unbinding a device.
Hence when you bind a device using script and unbind using kernel tools (/sys/bus/pci/drivers/xx/new_id, >>/sys/bus/pci/devices/xx/driver/unbind, /sys/bus/pci/drivers/xx/bind), driver_override is still set to the previous driver.
To avoid this, writing null to driver_override after binding a device to a driver. This will let the kernel tools unbind after binding using the dpdk script.
Bind pci to igb_uio and then bind to ixgbe ,both use "dpdk-devbind.py", it works well.
Could you . have a look at this as soon as possible ,it block the daily regression test.
Thank you very much.
Here is the patch to be applied
diff --git a/usertools/dpdk-devbind.py b/usertools/dpdk-devbind.py
index bb4d536e0..1dc1065b1 100755
--- a/usertools/dpdk-devbind.py
+++ b/usertools/dpdk-devbind.py
@@ -386,25 +386,6 @@ def unbind_one(dev_id, force):
"Skipping unbind" % (dev_id))
return
- # For kernels > 3.15 driver_override is used to bind a device to a driver.
- # Before unbinding it, overwrite driver_override with empty string so that
- # the device can be bound to any other driver
- filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
- if os.path.exists(filename):
- try:
- f = open(filename, "w")
- except:
- print("Error: unbind failed for %s - Cannot open %s"
- % (dev_id, filename))
- sys.exit(1)
- try:
- f.write("\00")
- f.close()
- except:
- print("Error: unbind failed for %s - Cannot open %s"
- % (dev_id, filename))
- sys.exit(1)
-
# write to /sys to unbind
filename = "/sys/bus/pci/drivers/%s/unbind" % dev["Driver_str"]
try:
@@ -507,6 +488,25 @@ def bind_one(dev_id, driver, force):
bind_one(dev_id, saved_driver, force)
return
+ # For kernels > 3.15 driver_override is used to bind a device to a driver.
+ # Before unbinding it, overwrite driver_override with empty string so that
+ # the device can be bound to any other driver
+ filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
+ if os.path.exists(filename):
+ try:
+ f = open(filename, "w")
+ except:
+ print("Error: unbind failed for %s - Cannot open %s"
+ % (dev_id, filename))
+ sys.exit(1)
+ try:
+ f.write("\00")
+ f.close()
+ except:
+ print("Error: unbind failed for %s - Cannot open %s"
+ % (dev_id, filename))
+ sys.exit(1)
+
def unbind_all(dev_list, force=False):
"""Unbind method, takes a list of device locations"""
There are my test env and steps:
dpdk commit eba33e87ad37626604be7186e746751f99691084
Components: usertools/dpdk-devbind.py
kernel: 4.8.6-300.fc25.x86_64
driver: ixgbe
version: 5.0.4
firmware-version: 0x61bf0001
Expect: we can use dpdk-devbind.py to bind or unbind PCI-device, we also can use kernel tools to bind or unbind PCI-device, such as :
steps:
# ./dpdk-devbind.py --bind=igb_uio 0000:05:00.0
status:
0000:05:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb' drv=igb_uio unused=
# echo "8086 10fd" >/sys/bus/pci/drivers/ixgbe/new_id
# echo "0000:05:00.0" >/sys/bus/pci/devices/0000\:05\:00.0/driver/unbind
# echo "0000:05:00.0" >/sys/bus/pci/drivers/ixgbe/ # echo "0000:05:00.0" >/sys/bus/pci/drivers/ixgbe/bind
-bash: echo: write error: No such device status
0000:05:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection' unused=ixgbe,igb_uio
Result:
It can't bind to ixgbe, expect it can bind to ixgbe.
I think the related commit are ::
commit 2fc3502935700243d9a6d903166e6fd11e429843
Author: Guduri Prathyusha <gprathyusha@caviumnetworks.com>
Date: Wed Mar 22 19:41:29 2017 +0530
usertools: use optimized driver override scheme to bind
commit c3ce205d5729867bd1c4c4429a80e01a528d5905
Author: Guduri Prathyusha <gprathyusha@caviumnetworks.com>
Date: Wed Mar 22 19:41:28 2017 +0530
usertools: optimize lspci invocation
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-dev] dpdk-devbind can't be used misc with kernel tools
2017-04-26 9:26 ` Prathyusha, Guduri
2017-04-27 6:42 ` Tu, LijuanX A
@ 2017-04-27 7:16 ` Tu, LijuanX A
2017-04-27 7:30 ` Prathyusha, Guduri
1 sibling, 1 reply; 5+ messages in thread
From: Tu, LijuanX A @ 2017-04-27 7:16 UTC (permalink / raw)
To: Prathyusha, Guduri
Cc: dev, Chen, WeichunX, Liu, Yu Y, Xu, Qian Q, Liu, Yong, Lu, PeipeiX
Hi Prathyusha,
The patch you created apply failed . I use the patch as attachment.
The tested result is OK ,please create another patch than can apply to DPDK.org
Thanks,
Lijuan
-----Original Message-----
From: Prathyusha, Guduri [mailto:Guduri.Prathyusha@cavium.com]
Sent: Wednesday, April 26, 2017 5:26 PM
To: Tu, LijuanX A
Cc: dev@dpdk.org; Chen, WeichunX; Liu, Yu Y; Xu, Qian Q; Liu, Yong; Lu, PeipeiX
Subject: Re: dpdk-devbind can't be used misc with kernel tools
Hi LijuanX A
Response inline...
Kindly apply the patch below (inline) and let me know the result. I will submit a formal patch once you confirm.
Thanks,
Prathyusha
From: Tu, LijuanX A <lijuanx.a.tu@intel.com>
Sent: Wednesday, April 26, 2017 11:49 AM
To: Prathyusha, Guduri
Cc: dev@dpdk.org; Chen, WeichunX; Liu, Yu Y; Xu, Qian Q; Liu, Yong; Lu, PeipeiX
Subject: dpdk-devbind can't be used misc with kernel tools
Hi Guduri,
I am a tester from intel dpdk team. I get a issues on usertools/dpdk-devbind.py
With the usertools/dpdk-devbind.py , I can't bind driver as expect.
I use the "dpdk-devbind.py" bind pci to igb_uio, then I using kernel tools bind pci to ixgbe, I can bind pci to igb_uio successfully ,but it bind back to ixgbe failed..
/sys/bus/pci/devices/xxxxxx/driver_override is used to bind and unbind devices to drivers in kernels >= 3.15 driver_override must be written to null for a device to bind to a driver. In the current script, null is written before unbinding a device.
Hence when you bind a device using script and unbind using kernel tools (/sys/bus/pci/drivers/xx/new_id, >>/sys/bus/pci/devices/xx/driver/unbind, /sys/bus/pci/drivers/xx/bind), driver_override is still set to the previous driver.
To avoid this, writing null to driver_override after binding a device to a driver. This will let the kernel tools unbind after binding using the dpdk script.
Bind pci to igb_uio and then bind to ixgbe ,both use "dpdk-devbind.py", it works well.
Could you . have a look at this as soon as possible ,it block the daily regression test.
Thank you very much.
Here is the patch to be applied
diff --git a/usertools/dpdk-devbind.py b/usertools/dpdk-devbind.py
index bb4d536e0..1dc1065b1 100755
--- a/usertools/dpdk-devbind.py
+++ b/usertools/dpdk-devbind.py
@@ -386,25 +386,6 @@ def unbind_one(dev_id, force):
"Skipping unbind" % (dev_id))
return
- # For kernels > 3.15 driver_override is used to bind a device to a driver.
- # Before unbinding it, overwrite driver_override with empty string so that
- # the device can be bound to any other driver
- filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
- if os.path.exists(filename):
- try:
- f = open(filename, "w")
- except:
- print("Error: unbind failed for %s - Cannot open %s"
- % (dev_id, filename))
- sys.exit(1)
- try:
- f.write("\00")
- f.close()
- except:
- print("Error: unbind failed for %s - Cannot open %s"
- % (dev_id, filename))
- sys.exit(1)
-
# write to /sys to unbind
filename = "/sys/bus/pci/drivers/%s/unbind" % dev["Driver_str"]
try:
@@ -507,6 +488,25 @@ def bind_one(dev_id, driver, force):
bind_one(dev_id, saved_driver, force)
return
+ # For kernels > 3.15 driver_override is used to bind a device to a driver.
+ # Before unbinding it, overwrite driver_override with empty string so that
+ # the device can be bound to any other driver
+ filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
+ if os.path.exists(filename):
+ try:
+ f = open(filename, "w")
+ except:
+ print("Error: unbind failed for %s - Cannot open %s"
+ % (dev_id, filename))
+ sys.exit(1)
+ try:
+ f.write("\00")
+ f.close()
+ except:
+ print("Error: unbind failed for %s - Cannot open %s"
+ % (dev_id, filename))
+ sys.exit(1)
+
def unbind_all(dev_list, force=False):
"""Unbind method, takes a list of device locations"""
There are my test env and steps:
dpdk commit eba33e87ad37626604be7186e746751f99691084
Components: usertools/dpdk-devbind.py
kernel: 4.8.6-300.fc25.x86_64
driver: ixgbe
version: 5.0.4
firmware-version: 0x61bf0001
Expect: we can use dpdk-devbind.py to bind or unbind PCI-device, we also can use kernel tools to bind or unbind PCI-device, such as :
steps:
# ./dpdk-devbind.py --bind=igb_uio 0000:05:00.0
status:
0000:05:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb' drv=igb_uio unused=
# echo "8086 10fd" >/sys/bus/pci/drivers/ixgbe/new_id
# echo "0000:05:00.0" >/sys/bus/pci/devices/0000\:05\:00.0/driver/unbind
# echo "0000:05:00.0" >/sys/bus/pci/drivers/ixgbe/ # echo "0000:05:00.0" >/sys/bus/pci/drivers/ixgbe/bind
-bash: echo: write error: No such device status
0000:05:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection' unused=ixgbe,igb_uio
Result:
It can't bind to ixgbe, expect it can bind to ixgbe.
I think the related commit are ::
commit 2fc3502935700243d9a6d903166e6fd11e429843
Author: Guduri Prathyusha <gprathyusha@caviumnetworks.com>
Date: Wed Mar 22 19:41:29 2017 +0530
usertools: use optimized driver override scheme to bind
commit c3ce205d5729867bd1c4c4429a80e01a528d5905
Author: Guduri Prathyusha <gprathyusha@caviumnetworks.com>
Date: Wed Mar 22 19:41:28 2017 +0530
usertools: optimize lspci invocation
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-dev] dpdk-devbind can't be used misc with kernel tools
2017-04-27 7:16 ` Tu, LijuanX A
@ 2017-04-27 7:30 ` Prathyusha, Guduri
0 siblings, 0 replies; 5+ messages in thread
From: Prathyusha, Guduri @ 2017-04-27 7:30 UTC (permalink / raw)
To: Tu, LijuanX A
Cc: dev, Chen, WeichunX, Liu, Yu Y, Xu, Qian Q, Liu, Yong, Lu, PeipeiX
Hi LijuanX A,
Thanks for verifying it. I have already submitted a formal patch for the same
http://dpdk.org/dev/patchwork/patch/23921/
Regards,
Prathyusha
________________________________
From: Tu, LijuanX A <lijuanx.a.tu@intel.com>
Sent: Thursday, April 27, 2017 12:46:58 PM
To: Prathyusha, Guduri
Cc: dev@dpdk.org; Chen, WeichunX; Liu, Yu Y; Xu, Qian Q; Liu, Yong; Lu, PeipeiX
Subject: RE: dpdk-devbind can't be used misc with kernel tools
Hi Prathyusha,
The patch you created apply failed . I use the patch as attachment.
The tested result is OK ,please create another patch than can apply to DPDK.org
Thanks,
Lijuan
-----Original Message-----
From: Prathyusha, Guduri [mailto:Guduri.Prathyusha@cavium.com]
Sent: Wednesday, April 26, 2017 5:26 PM
To: Tu, LijuanX A
Cc: dev@dpdk.org; Chen, WeichunX; Liu, Yu Y; Xu, Qian Q; Liu, Yong; Lu, PeipeiX
Subject: Re: dpdk-devbind can't be used misc with kernel tools
Hi LijuanX A
Response inline...
Kindly apply the patch below (inline) and let me know the result. I will submit a formal patch once you confirm.
Thanks,
Prathyusha
From: Tu, LijuanX A <lijuanx.a.tu@intel.com>
Sent: Wednesday, April 26, 2017 11:49 AM
To: Prathyusha, Guduri
Cc: dev@dpdk.org; Chen, WeichunX; Liu, Yu Y; Xu, Qian Q; Liu, Yong; Lu, PeipeiX
Subject: dpdk-devbind can't be used misc with kernel tools
Hi Guduri,
I am a tester from intel dpdk team. I get a issues on usertools/dpdk-devbind.py
With the usertools/dpdk-devbind.py , I can't bind driver as expect.
I use the "dpdk-devbind.py" bind pci to igb_uio, then I using kernel tools bind pci to ixgbe, I can bind pci to igb_uio successfully ,but it bind back to ixgbe failed..
/sys/bus/pci/devices/xxxxxx/driver_override is used to bind and unbind devices to drivers in kernels >= 3.15 driver_override must be written to null for a device to bind to a driver. In the current script, null is written before unbinding a device.
Hence when you bind a device using script and unbind using kernel tools (/sys/bus/pci/drivers/xx/new_id, >>/sys/bus/pci/devices/xx/driver/unbind, /sys/bus/pci/drivers/xx/bind), driver_override is still set to the previous driver.
To avoid this, writing null to driver_override after binding a device to a driver. This will let the kernel tools unbind after binding using the dpdk script.
Bind pci to igb_uio and then bind to ixgbe ,both use "dpdk-devbind.py", it works well.
Could you . have a look at this as soon as possible ,it block the daily regression test.
Thank you very much.
Here is the patch to be applied
diff --git a/usertools/dpdk-devbind.py b/usertools/dpdk-devbind.py
index bb4d536e0..1dc1065b1 100755
--- a/usertools/dpdk-devbind.py
+++ b/usertools/dpdk-devbind.py
@@ -386,25 +386,6 @@ def unbind_one(dev_id, force):
"Skipping unbind" % (dev_id))
return
- # For kernels > 3.15 driver_override is used to bind a device to a driver.
- # Before unbinding it, overwrite driver_override with empty string so that
- # the device can be bound to any other driver
- filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
- if os.path.exists(filename):
- try:
- f = open(filename, "w")
- except:
- print("Error: unbind failed for %s - Cannot open %s"
- % (dev_id, filename))
- sys.exit(1)
- try:
- f.write("\00")
- f.close()
- except:
- print("Error: unbind failed for %s - Cannot open %s"
- % (dev_id, filename))
- sys.exit(1)
-
# write to /sys to unbind
filename = "/sys/bus/pci/drivers/%s/unbind" % dev["Driver_str"]
try:
@@ -507,6 +488,25 @@ def bind_one(dev_id, driver, force):
bind_one(dev_id, saved_driver, force)
return
+ # For kernels > 3.15 driver_override is used to bind a device to a driver.
+ # Before unbinding it, overwrite driver_override with empty string so that
+ # the device can be bound to any other driver
+ filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
+ if os.path.exists(filename):
+ try:
+ f = open(filename, "w")
+ except:
+ print("Error: unbind failed for %s - Cannot open %s"
+ % (dev_id, filename))
+ sys.exit(1)
+ try:
+ f.write("\00")
+ f.close()
+ except:
+ print("Error: unbind failed for %s - Cannot open %s"
+ % (dev_id, filename))
+ sys.exit(1)
+
def unbind_all(dev_list, force=False):
"""Unbind method, takes a list of device locations"""
There are my test env and steps:
dpdk commit eba33e87ad37626604be7186e746751f99691084
Components: usertools/dpdk-devbind.py
kernel: 4.8.6-300.fc25.x86_64
driver: ixgbe
version: 5.0.4
firmware-version: 0x61bf0001
Expect: we can use dpdk-devbind.py to bind or unbind PCI-device, we also can use kernel tools to bind or unbind PCI-device, such as :
steps:
# ./dpdk-devbind.py --bind=igb_uio 0000:05:00.0
status:
0000:05:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb' drv=igb_uio unused=
# echo "8086 10fd" >/sys/bus/pci/drivers/ixgbe/new_id
# echo "0000:05:00.0" >/sys/bus/pci/devices/0000\:05\:00.0/driver/unbind
# echo "0000:05:00.0" >/sys/bus/pci/drivers/ixgbe/ # echo "0000:05:00.0" >/sys/bus/pci/drivers/ixgbe/bind
-bash: echo: write error: No such device status
0000:05:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection' unused=ixgbe,igb_uio
Result:
It can't bind to ixgbe, expect it can bind to ixgbe.
I think the related commit are ::
commit 2fc3502935700243d9a6d903166e6fd11e429843
Author: Guduri Prathyusha <gprathyusha@caviumnetworks.com>
Date: Wed Mar 22 19:41:29 2017 +0530
usertools: use optimized driver override scheme to bind
commit c3ce205d5729867bd1c4c4429a80e01a528d5905
Author: Guduri Prathyusha <gprathyusha@caviumnetworks.com>
Date: Wed Mar 22 19:41:28 2017 +0530
usertools: optimize lspci invocation
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2017-04-27 7:30 UTC | newest]
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-- links below jump to the message on this page --
2017-04-26 6:19 [dpdk-dev] dpdk-devbind can't be used misc with kernel tools Tu, LijuanX A
2017-04-26 9:26 ` Prathyusha, Guduri
2017-04-27 6:42 ` Tu, LijuanX A
2017-04-27 7:16 ` Tu, LijuanX A
2017-04-27 7:30 ` Prathyusha, Guduri
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