Re: Ordering between PCI config space writes and MMIO reads?

Ar Maw, 2006-10-24 am 12:13 -0700, ysgrifennodd Roland Dreier:
>  1) Is this something that should be fixed in the driver?  The PCI
>     spec allows MMIO cycles to start before an earlier config cycle
>     completed, but do we want to expose this fact to drivers?  Would
>     it be better for ia64 to use some sort of barrier to make sure
>     pci_write_config_xxx() is strongly ordered with MMIO?

It is good to be conservative in this area. Some AMD chipsets at least
had ordering problems with some configurations in the K7 era.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• Follow-Ups:
  • Re: Ordering between PCI config space writes and MMIO reads?
    • From: Roland Dreier <[email protected]>

• References:
  • Ordering between PCI config space writes and MMIO reads?
    • From: Roland Dreier <[email protected]>

• Prev by Date: BUG: Network: Duplicate MAC adress response in multihomed system : All Kernels
• Next by Date: Re: [PATCH] Freeze bdevs when freezing processes.
• Previous by thread: Re: [openib-general] Ordering between PCI config space writes and MMIO reads?
• Next by thread: Re: Ordering between PCI config space writes and MMIO reads?
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]