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From: Vlad Zolotarov <vladz@cloudius-systems.com>
To: "dev@dpdk.org" <dev@dpdk.org>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Subject: [dpdk-dev] Having troubles binding an SR-IOV VF to uio_pci_generic on Amazon instance
Date: Sun, 27 Sep 2015 10:05:11 +0300	[thread overview]
Message-ID: <56079527.3000802@cloudius-systems.com> (raw)

Hi,
I was trying to use uio_pci_generic with Intel's 10G SR-IOV devices on 
Amazon EC2 instances with Enhanced Networking enabled.
The idea is to create a DPDK environment that doesn't require compiling 
kernel modules (igb_uio).
However I was surprised to discover that uio_pci_generic refuses to work 
with EN device on AWS:

$ lspci
00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 01)
00:02.0 VGA compatible controller: Cirrus Logic GD 5446
00:03.0 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)
00:04.0 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)
00:1f.0 Unassigned class [ff80]: XenSource, Inc. Xen Platform Device (rev 01)

$ sudo ./dpdk/tools/dpdk_nic_bind.py -b uio_pci_generic 00:04.0
Error: bind failed for 0000:00:04.0 - Cannot bind to driver uio_pci_generic

$dmesg

--> snip <---
[  816.655575] uio_pci_generic 0000:00:04.0: No IRQ assigned to device: no support for interrupts?

$ sudo lspci -s 00:04.0 -vvv
00:04.0 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)
	Physical Slot: 4
	Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Region 0: Memory at f3008000 (64-bit, prefetchable) [size=16K]
	Region 3: Memory at f300c000 (64-bit, prefetchable) [size=16K]
	Capabilities: [70] MSI-X: Enable- Count=3 Masked-
		Vector table: BAR=3 offset=00000000
		PBA: BAR=3 offset=00002000
	Kernel modules: ixgbevf

So, as we may see the PCI device doesn't have an INTX interrupt line 
assigned indeed. It has an MSI-X capability however.
Looking at the uio_pci_generic code it seems to require the INTX:

uio_pci_generic.c: line 74: probe():

	if (!pdev->irq) {
		dev_warn(&pdev->dev, "No IRQ assigned to device: "
			 "no support for interrupts?\n");
		pci_disable_device(pdev);
		return -ENODEV;
	}

Is it a known limitation? Michael, could u, pls., comment on this?

thanks,
vlad

             reply	other threads:[~2015-09-27  7:05 UTC|newest]

Thread overview: 100+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-27  7:05 Vlad Zolotarov [this message]
2015-09-27  9:43 ` Michael S. Tsirkin
2015-09-27 10:50   ` Vladislav Zolotarov
2015-09-29 16:41   ` Vlad Zolotarov
2015-09-29 20:54     ` Michael S. Tsirkin
2015-09-29 21:46       ` Stephen Hemminger
2015-09-29 21:49         ` Michael S. Tsirkin
2015-09-30 10:37           ` Vlad Zolotarov
2015-09-30 10:58             ` Michael S. Tsirkin
2015-09-30 11:26               ` Vlad Zolotarov
     [not found]                 ` <20150930143927-mutt-send-email-mst@redhat.com>
2015-09-30 11:53                   ` Vlad Zolotarov
2015-09-30 12:03                     ` Michael S. Tsirkin
2015-09-30 12:16                       ` Vlad Zolotarov
2015-09-30 12:27                         ` Michael S. Tsirkin
2015-09-30 12:50                           ` Vlad Zolotarov
2015-09-30 15:26                             ` Michael S. Tsirkin
2015-09-30 18:15                               ` Vlad Zolotarov
2015-09-30 18:55                                 ` Michael S. Tsirkin
2015-09-30 19:06                                   ` Vlad Zolotarov
2015-09-30 19:10                                     ` Vlad Zolotarov
2015-09-30 19:11                                       ` Vlad Zolotarov
2015-09-30 19:39                                     ` Michael S. Tsirkin
2015-09-30 20:09                                       ` Vlad Zolotarov
2015-09-30 21:36                                         ` Stephen Hemminger
2015-09-30 21:53                                           ` Michael S. Tsirkin
2015-09-30 22:20                                           ` Vlad Zolotarov
2015-10-01  8:00                                           ` Vlad Zolotarov
2015-10-01 14:47                                             ` Stephen Hemminger
2015-10-01 15:03                                               ` Vlad Zolotarov
2015-09-30 13:05                           ` Avi Kivity
2015-09-30 14:39                             ` Michael S. Tsirkin
2015-09-30 14:53                               ` Avi Kivity
2015-09-30 15:21                                 ` Michael S. Tsirkin
2015-09-30 15:36                                   ` Avi Kivity
2015-09-30 20:40                                     ` Michael S. Tsirkin
2015-09-30 21:00                                       ` Avi Kivity
2015-10-01  8:44                                       ` Michael S. Tsirkin
2015-10-01  8:46                                         ` Vlad Zolotarov
2015-10-01  8:52                                         ` Avi Kivity
2015-10-01  9:15                                           ` Michael S. Tsirkin
2015-10-01  9:22                                             ` Avi Kivity
2015-10-01  9:42                                               ` Michael S. Tsirkin
2015-10-01  9:53                                                 ` Avi Kivity
2015-10-01 10:17                                                   ` Michael S. Tsirkin
2015-10-01 10:24                                                     ` Avi Kivity
2015-10-01 10:25                                                       ` Avi Kivity
2015-10-01 10:44                                                         ` Michael S. Tsirkin
2015-10-01 10:55                                                           ` Avi Kivity
2015-10-01 21:17                                                 ` Alexander Duyck
2015-10-02 13:50                                                   ` Michael S. Tsirkin
2015-10-01  9:42                                               ` Vincent JARDIN
2015-10-01  9:43                                                 ` Avi Kivity
2015-10-01  9:48                                                   ` Vincent JARDIN
2015-10-01  9:54                                                     ` Avi Kivity
2015-10-01 10:14                                                   ` Michael S. Tsirkin
2015-10-01 10:23                                                     ` Avi Kivity
2015-10-01 14:55                                                     ` Stephen Hemminger
2015-10-01 15:49                                                       ` Michael S. Tsirkin
2015-10-01 14:54                                                 ` Stephen Hemminger
2015-10-01  9:55                                               ` Michael S. Tsirkin
2015-10-01  9:59                                                 ` Avi Kivity
2015-10-01 10:38                                                   ` Michael S. Tsirkin
2015-10-01 10:50                                                     ` Avi Kivity
2015-10-01 11:09                                                       ` Michael S. Tsirkin
2015-10-01 11:20                                                         ` Avi Kivity
2015-10-01 11:27                                                           ` Michael S. Tsirkin
2015-10-01 11:32                                                             ` Avi Kivity
2015-10-01 15:01                                                               ` Stephen Hemminger
2015-10-01 15:08                                                                 ` Avi Kivity
2015-10-01 15:46                                                                 ` Michael S. Tsirkin
2015-10-01 15:11                                                               ` Michael S. Tsirkin
2015-10-01 15:19                                                                 ` Avi Kivity
2015-10-01 15:40                                                                   ` Michael S. Tsirkin
2015-10-01 11:31                                                           ` Michael S. Tsirkin
2015-10-01 11:34                                                             ` Avi Kivity
2015-10-01 11:08                                                     ` Bruce Richardson
2015-10-01 11:23                                                       ` Michael S. Tsirkin
2015-10-01 12:07                                                         ` Bruce Richardson
2015-10-01 13:14                                                           ` Michael S. Tsirkin
2015-10-01 16:04                                                             ` Michael S. Tsirkin
2015-10-01 21:02                                                             ` Alexander Duyck
2015-10-02 14:00                                                               ` Michael S. Tsirkin
2015-10-02 14:07                                                                 ` Bruce Richardson
2015-10-04  9:07                                                                   ` Michael S. Tsirkin
2015-10-02 15:56                                                                 ` Gleb Natapov
2015-10-02 16:57                                                                 ` Alexander Duyck
2015-10-01  9:15                                           ` Avi Kivity
2015-10-01  9:29                                             ` Michael S. Tsirkin
2015-10-01  9:38                                               ` Avi Kivity
2015-10-01 10:07                                                 ` Michael S. Tsirkin
2015-10-01 10:11                                                   ` Avi Kivity
2015-10-01  9:16                                         ` Michael S. Tsirkin
2015-09-30 17:28             ` Stephen Hemminger
2015-09-30 17:39               ` Michael S. Tsirkin
2015-09-30 17:43                 ` Stephen Hemminger
2015-09-30 18:50                   ` Michael S. Tsirkin
2015-09-30 20:00                     ` Gleb Natapov
2015-09-30 20:36                       ` Michael S. Tsirkin
2015-10-01  5:04                         ` Gleb Natapov
2015-09-30 17:44                 ` Gleb Natapov

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