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path: root/drivers/scsi/aacraid/comminit.c
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Diffstat (limited to 'drivers/scsi/aacraid/comminit.c')
-rw-r--r--drivers/scsi/aacraid/comminit.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c
index 16310443b55a..d598eba630d0 100644
--- a/drivers/scsi/aacraid/comminit.c
+++ b/drivers/scsi/aacraid/comminit.c
@@ -54,6 +54,7 @@ static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long co
const unsigned long printfbufsiz = 256;
struct aac_init *init;
dma_addr_t phys;
+ unsigned long aac_max_hostphysmempages;
size = fibsize + sizeof(struct aac_init) + commsize + commalign + printfbufsiz;
@@ -90,7 +91,18 @@ 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));
- init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
+ /*
+ * number of 4k pages of host physical memory. The aacraid fw needs
+ * this number to be less than 4gb worth of pages. 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.
+ */
+ aac_max_hostphysmempages = dma_get_required_mask(&dev->pdev->dev) >> 12;
+ if (aac_max_hostphysmempages < AAC_MAX_HOSTPHYSMEMPAGES)
+ init->HostPhysMemPages = cpu_to_le32(aac_max_hostphysmempages);
+ else
+ init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
init->InitFlags = 0;
if (dev->comm_interface == AAC_COMM_MESSAGE) {