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NTB: Clear property bits in BAR value

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The lower bits read from a BAR register will contain property bits
that we do not care about. Clear those so that we can use the BAR
values for limit and xlat registers.

Reported-by: Conrad Meyer <cem@freebsd.org>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
This commit is contained in:
Dave Jiang 2015-11-19 14:00:54 -07:00 committed by Jon Mason
parent 179f912a39
commit 703872c2c5
2 changed files with 5 additions and 2 deletions
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4
drivers/ntb/hw/intel/ntb_hw_intel.c
View file

@ -875,7 +875,7 @@ static int intel_ntb_mw_set_trans(struct ntb_dev *ntb, int idx,
limit_reg = bar2_off(ndev->xlat_reg->bar2_limit, bar);
if (bar < 4 || !ndev->bar4_split) {
base = ioread64(mmio + base_reg);
base = ioread64(mmio + base_reg) & NTB_BAR_MASK_64;
/* Set the limit if supported, if size is not mw_size */
if (limit_reg && size != mw_size)
@ -906,7 +906,7 @@ static int intel_ntb_mw_set_trans(struct ntb_dev *ntb, int idx,
if ((addr + size) & (~0ull << 32))
return -EINVAL;
base = ioread32(mmio + base_reg);
base = ioread32(mmio + base_reg) & NTB_BAR_MASK_32;
/* Set the limit if supported, if size is not mw_size */
if (limit_reg && size != mw_size)

3
drivers/ntb/hw/intel/ntb_hw_intel.h
View file

@ -245,6 +245,9 @@
#define NTB_UNSAFE_DB BIT_ULL(0)
#define NTB_UNSAFE_SPAD BIT_ULL(1)
#define NTB_BAR_MASK_64 ~(0xfull)
#define NTB_BAR_MASK_32 ~(0xfu)
struct intel_ntb_dev;
struct intel_ntb_reg {