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* [dpdk-dev] UIO pci-generic support broke igb_uio
@ 2015-04-15  1:06 Stephen Hemminger
  2015-04-15  7:19 ` Zhou, Danny
  0 siblings, 1 reply; 6+ messages in thread
From: Stephen Hemminger @ 2015-04-15  1:06 UTC (permalink / raw)
  To: Danny Zhou, Bruce Richardson, Declan Doherty; +Cc: dev

The addition of uio pci-generic broke use if igb_uio because
the wrong file descriptor is being used.

If I was a hard ass I would recommend uio pci-generic support
be reverted from 2.0 until/unless this fixed.

Failure mode is on startup:

EAL:  Error reading interrupts status for fd 0
PANIC in start_port()
rte_eth-dev_start: port=0 err=-5

The problem commit is:
commit 4a499c64959074ba6fa6a5a2b3a2a6aa10627fa1
Author: Danny Zhou <danny.zhou@intel.com>
Date:   Fri Feb 20 16:59:15 2015 +0000

    eal/linux: enable uio_pci_generic support
    
    Change the EAL PCI code so that it can work with both the
    uio_pci_generic in-tree driver, as well as the igb_uio
    DPDK-specific driver.
    
    This involves changes to
    1) Modify method of retrieving BAR resource mapping information
    2) Mapping using resource files in /sys rather than /dev/uio*
    2) Setup bus master bit in NIC's PCIe configuration space for
    uio_pci_generic.
    
    Signed-off-by: Danny Zhou <danny.zhou@intel.com>
    Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
    Acked-by: Declan Doherty <declan.doherty@intel.com>

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2015-04-15 16:38 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-04-15  1:06 [dpdk-dev] UIO pci-generic support broke igb_uio Stephen Hemminger
2015-04-15  7:19 ` Zhou, Danny
2015-04-15 15:57   ` Stephen Hemminger
2015-04-15 16:34   ` [dpdk-dev] [PATCH 0/2] fix UIO support broken by 2.0 Stephen Hemminger
2015-04-15 16:36     ` [dpdk-dev] [PATCH 1/2 kernel] uio: add irq control support to uio_pci_generic Stephen Hemminger
2015-04-15 16:38     ` [dpdk-dev] [PATCH 2/2 dpdk] uio: fix pci generic driver breakage Stephen Hemminger

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