From: Peter Xu <peterx@redhat.com>
To: DPDK Dev <dev@dpdk.org>
Subject: [dpdk-dev] [Question] How pmd virtio works without UIO?
Date: Tue, 22 Dec 2015 11:50:41 +0800 [thread overview]
Message-ID: <20151222035041.GA7532@pxdev.xzpeter.org> (raw)
Hi,
I got a question related to how virtio pmd driver work without
UIO layer.
I see that in virtio PMD driver, DPDK will first try to init the
device using UIO interfaces. If it fails, it will try to init by
manipulating IO ports directly (see virtio_resource_init()).
For the ioport case, is it okay to do it like this? E.g., in
eth_virtio_dev_init(), we are resetting the virtio device, however,
this device should still be owned by virtio-pci driver in the
kernel.
How is that working? Did I miss anything?
Thanks in advance.
Peter
next reply other threads:[~2015-12-22 3:50 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-22 3:50 Peter Xu [this message]
2015-12-22 7:00 ` Yuanhan Liu
2015-12-22 8:23 ` Peter Xu
2015-12-22 8:32 ` Yuanhan Liu
2015-12-22 9:56 ` Peter Xu
2015-12-22 10:47 ` Xie, Huawei
2015-12-22 10:53 ` Xie, Huawei
2015-12-22 11:39 ` Peter Xu
2015-12-22 14:31 ` Xie, Huawei
2015-12-22 16:38 ` Xie, Huawei
2015-12-23 1:55 ` Peter Xu
2015-12-23 2:09 ` Yuanhan Liu
2015-12-23 2:38 ` Peter Xu
2015-12-23 22:26 ` Thomas Monjalon
2015-12-24 3:30 ` Yuanhan Liu
2015-12-24 17:56 ` Stephen Hemminger
2015-12-23 2:01 ` Yuanhan Liu
2015-12-23 2:41 ` Peter Xu
2015-12-23 2:58 ` Yuanhan Liu
2015-12-23 5:13 ` Xie, Huawei
2015-12-23 22:20 ` Thomas Monjalon
2015-12-24 18:38 ` [dpdk-dev] [PATCH 0/4] check if any kernel driver is manipulating the virtio device Huawei Xie
2015-12-24 18:38 ` [dpdk-dev] [PATCH 1/4] eal: make the comment more accurate Huawei Xie
2015-12-24 18:38 ` [dpdk-dev] [PATCH 2/4] eal: set kdrv to RTE_KDRV_NONE if kernel driver isn't manipulating the device Huawei Xie
2015-12-28 20:24 ` David Marchand
2015-12-24 18:38 ` [dpdk-dev] [PATCH 3/4] virtio: return 1 to tell the upper layer we don't take over this device Huawei Xie
2015-12-28 5:25 ` Yuanhan Liu
2015-12-28 5:38 ` Xie, Huawei
2015-12-24 18:38 ` [dpdk-dev] [PATCH 4/4] virtio: check if any kernel driver is manipulating the device Huawei Xie
2015-12-28 5:26 ` Yuanhan Liu
2015-12-28 5:29 ` Xie, Huawei
2016-01-04 9:02 ` Xie, Huawei
2016-01-04 17:29 ` Stephen Hemminger
2016-01-05 14:44 ` Panu Matilainen
2015-12-28 3:08 ` [dpdk-dev] [PATCH 0/4] check if any kernel driver is manipulating the virtio device Peter Xu
2016-01-03 17:56 ` [dpdk-dev] [PATCH v2 0/4] fix the issue that DPDK takes over virtio device blindly Huawei Xie
2016-01-03 17:56 ` [dpdk-dev] [PATCH v2 1/4] eal: make the comment more accurate Huawei Xie
2016-01-03 17:56 ` [dpdk-dev] [PATCH v2 2/4] eal: set kdrv to RTE_KDRV_NONE if kernel driver isn't manipulating the device Huawei Xie
2016-01-03 17:56 ` [dpdk-dev] [PATCH v2 3/4] virtio: return 1 to tell the upper layer we don't take over this device Huawei Xie
2016-01-03 17:56 ` [dpdk-dev] [PATCH v2 4/4] virtio: check if any kernel driver is manipulating the virtio device Huawei Xie
2016-01-04 17:24 ` Stephen Hemminger
2016-01-04 17:56 ` Xie, Huawei
2016-01-05 1:56 ` Yuanhan Liu
2016-01-07 13:17 ` Ferruh Yigit
2016-01-07 14:17 ` Panu Matilainen
2016-01-27 12:43 ` Thomas Monjalon
2016-01-04 17:25 ` [dpdk-dev] [PATCH v2 0/4] fix the issue that DPDK takes over virtio device blindly Stephen Hemminger
2016-01-12 3:02 ` Xie, Huawei
2016-01-12 4:23 ` Santosh Shukla
2016-01-12 5:16 ` Xie, Huawei
2016-01-13 12:17 ` Santosh Shukla
2016-01-27 15:21 ` [dpdk-dev] [PATCH v3 " Huawei Xie
2016-01-27 15:21 ` [dpdk-dev] [PATCH v3 1/4] eal: make the comment more accurate Huawei Xie
2016-01-27 15:21 ` [dpdk-dev] [PATCH v3 2/4] eal: set kdrv to RTE_KDRV_NONE if kernel driver isn't manipulating the device Huawei Xie
2016-01-27 15:21 ` [dpdk-dev] [PATCH v3 3/4] virtio: return 1 to tell the upper layer we don't take over this device Huawei Xie
2016-01-27 15:21 ` [dpdk-dev] [PATCH v3 4/4] virtio: check if kernel driver is manipulating the virtio device Huawei Xie
2016-01-28 9:55 ` Panu Matilainen
2016-01-29 7:40 ` [dpdk-dev] [PATCH v3 0/4] fix the issue that DPDK takes over virtio device blindly Yuanhan Liu
2016-02-24 12:43 ` Thomas Monjalon
2016-02-26 6:09 ` Xie, Huawei
2016-02-26 8:40 ` David Marchand
2016-02-26 9:00 ` Xie, Huawei
2016-02-26 1:53 ` [dpdk-dev] [PATCH v4 " Huawei Xie
2016-02-26 1:53 ` [dpdk-dev] [PATCH v4 1/4] eal: make the comment more accurate Huawei Xie
2016-02-29 8:48 ` David Marchand
2016-02-26 1:53 ` [dpdk-dev] [PATCH v4 2/4] eal: set kdrv to RTE_KDRV_NONE if kernel driver isn't managing the device Huawei Xie
2016-02-29 2:34 ` Xie, Huawei
2016-02-29 8:46 ` David Marchand
2016-02-29 9:00 ` Xie, Huawei
2016-02-29 9:05 ` David Marchand
2016-02-26 1:53 ` [dpdk-dev] [PATCH v4 3/4] eal: call pci_ioport_map when " Huawei Xie
2016-02-29 9:02 ` David Marchand
2016-02-26 1:53 ` [dpdk-dev] [PATCH v4 4/4] virtio: return 1 to tell the upper layer we don't take over this device Huawei Xie
2016-02-29 13:15 ` Santosh Shukla
2016-03-01 7:16 ` Thomas Monjalon
2016-03-01 7:53 ` Xie, Huawei
2016-03-01 8:20 ` Thomas Monjalon
2016-03-01 8:39 ` Xie, Huawei
2016-03-01 9:55 ` Thomas Monjalon
2016-03-01 10:08 ` Xie, Huawei
2016-03-08 17:00 ` Xie, Huawei
2016-03-08 23:01 ` Thomas Monjalon
2016-03-08 15:33 ` [dpdk-dev] [PATCH v5 0/6] fix the issue that DPDK takes over virtio device blindly Huawei Xie
2016-03-08 15:33 ` [dpdk-dev] [PATCH v5 1/6] eal: make the comment more accurate Huawei Xie
2016-03-08 15:33 ` [dpdk-dev] [PATCH v5 2/6] eal: RTE_KDRV_NONE means kernel driver isn't managing the device Huawei Xie
2016-03-08 15:33 ` [dpdk-dev] [PATCH v5 3/6] eal: use new RTE_ARCH_X86 for x86 arch Huawei Xie
2016-03-09 23:04 ` Thomas Monjalon
2016-03-08 15:33 ` [dpdk-dev] [PATCH v5 4/6] eal: simple code rework Huawei Xie
2016-03-08 15:33 ` [dpdk-dev] [PATCH v5 5/6] eal: map IO port when kernel driver isn't managing the device Huawei Xie
2016-03-08 15:33 ` [dpdk-dev] [PATCH v5 6/6] virtio: return 1 to tell the upper layer we don't take over this device Huawei Xie
2016-03-09 23:23 ` Thomas Monjalon
2016-03-09 23:35 ` [dpdk-dev] [PATCH v5 0/6] fix the issue that DPDK takes over virtio device blindly Thomas Monjalon
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