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authorSalyzyn, Mark <mark_salyzyn@adaptec.com>2006-06-26 08:37:39 -0400
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-06-26 16:47:46 -0500
commit12e9b5fb96028aab26af65bb06d2dee56c428a6e (patch)
tree02208162fa852b78fc1908e8d97a1d866089b503 /drivers/scsi/aacraid
parent99d19bb75b88cc997d3cd611903908714c735981 (diff)
[SCSI] aacraid: remove x86_64 IOMMU dependent code
This may seem like a DILLIGAF, but after chatting with the F/W folks, there is no harm in dropping the page calculation as denoted in the enclosed patch for these older adapters in this new age of 4GB+ memory sticks. Any resource optimization within the old-old-old adapters for systems with less than 4G of memory is of little consequence. The existing AAC_QUIRK_31BIT flag in linit.c should look after the rest of the legacy hardware DMA limitations. Signed-off-by: Mark Salyzyn <aacraid@adaptec.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/aacraid')
-rw-r--r--drivers/scsi/aacraid/comminit.c23
1 files changed, 1 insertions, 22 deletions
diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c
index 35b0a6ebd3f..1cd3584ba7f 100644
--- a/drivers/scsi/aacraid/comminit.c
+++ b/drivers/scsi/aacraid/comminit.c
@@ -92,28 +92,7 @@ static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long co
init->AdapterFibsPhysicalAddress = cpu_to_le32((u32)phys);
init->AdapterFibsSize = cpu_to_le32(fibsize);
init->AdapterFibAlign = cpu_to_le32(sizeof(struct hw_fib));
- /*
- * number of 4k pages of host physical memory. The aacraid fw needs
- * this number to be less than 4gb worth of pages. num_physpages is in
- * system page units. New firmware doesn't have any issues with the
- * mapping system, but older Firmware did, and had *troubles* dealing
- * with the math overloading past 32 bits, thus we must limit this
- * field.
- *
- * This assumes the memory is mapped zero->n, which isnt
- * always true on real computers. It also has some slight problems
- * with the GART on x86-64. I've btw never tried DMA from PCI space
- * on this platform but don't be surprised if its problematic.
- */
-#ifndef CONFIG_GART_IOMMU
- if ((num_physpages << (PAGE_SHIFT - 12)) <= AAC_MAX_HOSTPHYSMEMPAGES) {
- init->HostPhysMemPages =
- cpu_to_le32(num_physpages << (PAGE_SHIFT-12));
- } else
-#endif
- {
- init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
- }
+ init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
init->InitFlags = 0;
if (dev->new_comm_interface) {