Re: [ANNOUNCE][PATCH 2.6.11 2/3] megaraid_sas: Announcing new mod ule for LSI Logic's SAS based MegaRAID controllers

From: 'Christoph Hellwig' (hch_at_infradead.org)
Date: 03/09/05

  • Next message: Alan Cox: "Re: [PATCH] Support for GEODE CPUs" 
    Date:	Wed, 9 Mar 2005 22:03:35 +0000
To: "Bagalkote, Sreenivas" <sreenib@lsil.com>

    On Wed, Mar 09, 2005 at 09:43:47AM -0500, Bagalkote, Sreenivas wrote:
    > During the module load time, I allocate 32 bit or 64 bit SGLs based on
    > whether I can receive 64 bit DMA addresses or not. If size of dma_addr_t
    > is 4, then I allocate only 32 bit SGLs. During the run time, I prepare
    > 32/64 bit SGLs based on this variable. And since this is compile time
    > system-wide property, I kept it as driver global.

    Even for kernels with a 64bit dma_addr_t you can get 32bit dma addresses
    only. As a start check whether the pci_set_dma_mask for the 64bit mask
    failed - in that case you can always use 32bit SGLs.
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

  • Next message: Alan Cox: "Re: [PATCH] Support for GEODE CPUs"