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[SCSI] hpsa: factor out hpsa_p600_dma_prefetch_quirk

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Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Stephen M. Cameron 2010-05-27 15:13:43 -05:00 • committed by James Bottomley
parent f7c391015a
commit 3d0eab67cf
1 changed files with 15 additions and 11 deletions
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26
drivers/scsi/hpsa.c
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@ -3396,6 +3396,20 @@ static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
#endif #endif
} }
/* Disable DMA prefetch for the P600. Otherwise an ASIC bug may result
* in a prefetch beyond physical memory.
*/
static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
{
u32 dma_prefetch;
if (h->board_id != 0x3225103C)
return;
dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
dma_prefetch |= 0x8000;
writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
}
static int __devinit hpsa_pci_init(struct ctlr_info *h) static int __devinit hpsa_pci_init(struct ctlr_info *h)
{ {
int i, prod_index, err; int i, prod_index, err;
@ -3444,17 +3458,7 @@ static int __devinit hpsa_pci_init(struct ctlr_info *h)
goto err_out_free_res; goto err_out_free_res;
} }
hpsa_enable_scsi_prefetch(h); hpsa_enable_scsi_prefetch(h);
hpsa_p600_dma_prefetch_quirk(h);
/* Disabling DMA prefetch for the P600
* An ASIC bug may result in a prefetch beyond
* physical memory.
*/
if (h->board_id == 0x3225103C) {
u32 dma_prefetch;
dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
dma_prefetch |= 0x8000;
writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
}
h->max_commands = readl(&(h->cfgtable->CmdsOutMax)); h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
/* Update the field, and then ring the doorbell */ /* Update the field, and then ring the doorbell */