Messages in this thread | | | Date | Thu, 23 Aug 2001 09:53:24 +0200 | From | Jens Axboe <> | Subject | [patch] PCI64 + block zero-bounce highmem v11 |
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Hi,
Uploaded a new version. Changes since block-highmem-all-10:
- Merge pci64-1 from davem (me) - Merge pci64-2 from davem (me) - printk type warning on x86 when HIGHMEM wasn't enabled (me) - Better comment asm-i386/scatterlist.h - Add single_segment/highmem comment in scsi_merge (me) - Include Mark Hemment's no __save_flags/__cli in read bounce - Convert cciss to pci64 interface (me)
HIGHMEM I/O capable hardware now includes:
- IDE (DMA, PIO will revert to bounce) Basically all low level drivers - SCSI - aic7xxx (new) - qlogicfc (64-bit too) - sym53c8xx (64-bit too) - megaraid - IPS - cpqarray - cciss (64-bit too)
SCSI drivers are typically easy to convert to support < 4GB I/O, usually just the can_dma_32 flag needs to be added. Some need a bit more work, like IPS. Look for references to virt_to_bus on the scatterlist ->address and/or bh->b_data to find obvious highmem breakage. For 64-bit PCI DMA, take a look at David's modifications to sym53c8xx as a good reference.
I'll include I2O highmem support in the next release -- haven't started it yet, but it should be a breeze.
DAC960 would be nice to have as well. Leonard, we talked about converting it to the pci dma interface some time ago -- did you make progress on that?
*.kernel.org/pub/linux/kernel/people/axboe/patches/2.4.9/block-highmem-all-11
-- Jens Axboe
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