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IB/ipath: Add flag and handling for chips with swapped register bug

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The 6110 had a bug that caused some registers to be swapped; it was
fixed for the 7220 (and didn't affect the 6120 because it had fewer
registers).  This adds a flag and related code to handle that, and
includes some minor cleanups in the same area.

Signed-off-by:  Ralph Campbell <ralph.campbell@qlogic.com>
This commit is contained in:
Ralph Campbell 2008-01-06 21:12:38 -08:00 committed by Roland Dreier
parent 60948a4158
commit 4ea61b548b
5 changed files with 10 additions and 16 deletions
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11
drivers/infiniband/hw/ipath/ipath_driver.c
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@ -1340,14 +1340,9 @@ static void ipath_update_pio_bufs(struct ipath_devdata *dd)
/*
* Chip Errata: bug 6641; even and odd qwords>3 are swapped
*/
if (i > 3) {
if (i & 1)
piov = le64_to_cpu(
dd->ipath_pioavailregs_dma[i - 1]);
else
piov = le64_to_cpu(
dd->ipath_pioavailregs_dma[i + 1]);
} else
if (i > 3 && (dd->ipath_flags & IPATH_SWAP_PIOBUFS))
piov = le64_to_cpu(dd->ipath_pioavailregs_dma[i ^ 1]);
else
piov = le64_to_cpu(dd->ipath_pioavailregs_dma[i]);
pchg = _IPATH_ALL_CHECKBITS &
~(dd->ipath_pioavailshadow[i] ^ piov);

2
drivers/infiniband/hw/ipath/ipath_iba6110.c
View File

@ -1043,6 +1043,8 @@ static int ipath_setup_ht_config(struct ipath_devdata *dd,
} while ((pos = pci_find_next_capability(pdev, pos,
PCI_CAP_ID_HT)));
dd->ipath_flags |= IPATH_SWAP_PIOBUFS;
bail:
return ret;
}

8
drivers/infiniband/hw/ipath/ipath_init_chip.c
View File

@ -528,12 +528,8 @@ static void enable_chip(struct ipath_devdata *dd,
/*
* Chip Errata bug 6641; even and odd qwords>3 are swapped.
*/
if (i > 3) {
if (i & 1)
val = dd->ipath_pioavailregs_dma[i - 1];
else
val = dd->ipath_pioavailregs_dma[i + 1];
}
if (i > 3 && (dd->ipath_flags & IPATH_SWAP_PIOBUFS))
val = dd->ipath_pioavailregs_dma[i ^ 1];
else
val = dd->ipath_pioavailregs_dma[i];
dd->ipath_pioavailshadow[i] = le64_to_cpu(val);

4
drivers/infiniband/hw/ipath/ipath_intr.c
View File

@ -831,8 +831,8 @@ void ipath_clear_freeze(struct ipath_devdata *dd)
*/
for (i = 0; i < dd->ipath_pioavregs; i++) {
/* deal with 6110 chip bug */
im = i > 3 ? ((i&1) ? i-1 : i+1) : i;
val = ipath_read_kreg64(dd, (0x1000/sizeof(u64))+im);
im = i > 3 ? i ^ 1 : i;
val = ipath_read_kreg64(dd, (0x1000 / sizeof(u64)) + im);
dd->ipath_pioavailregs_dma[i] = dd->ipath_pioavailshadow[i]
= le64_to_cpu(val);
}

1
drivers/infiniband/hw/ipath/ipath_kernel.h
View File

@ -756,6 +756,7 @@ int ipath_set_rx_pol_inv(struct ipath_devdata *dd, u8 new_pol_inv);
#define IPATH_DISABLED 0x80000 /* administratively disabled */
/* Use GPIO interrupts for new counters */
#define IPATH_GPIO_ERRINTRS 0x100000
#define IPATH_SWAP_PIOBUFS 0x200000
/* Bits in GPIO for the added interrupts */
#define IPATH_GPIO_PORT0_BIT 2