diff options
| author | Arthur Jones <arthur.jones@qlogic.com> | 2007-03-15 14:45:05 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-04-18 20:20:58 -0700 |
| commit | 569b87b47f906d65ee35d6ecc4767f20a6390b9b (patch) | |
| tree | d674574d3db6b25fe6bb41da8c64e1641bcc0d03 /drivers/infiniband/hw/ipath/ipath_file_ops.c | |
| parent | 7b196e2ff3953063b656212ff517f6115a1477b2 (diff) | |
| download | lwn-569b87b47f906d65ee35d6ecc4767f20a6390b9b.tar.gz lwn-569b87b47f906d65ee35d6ecc4767f20a6390b9b.zip | |
IB/ipath: Force PIOAvail update entry point
Due to a chip bug, the PIOAvail register is not always updated to
memory. This patch allows userspace to force an update.
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_file_ops.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_file_ops.c | 38 |
1 files changed, 30 insertions, 8 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_file_ops.c b/drivers/infiniband/hw/ipath/ipath_file_ops.c index bb53bde80ee8..9ca582b65fe9 100644 --- a/drivers/infiniband/hw/ipath/ipath_file_ops.c +++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c @@ -2047,6 +2047,17 @@ static int ipath_get_slave_info(struct ipath_portdata *pd, return ret; } +static int ipath_force_pio_avail_update(struct ipath_devdata *dd) +{ + u64 reg = dd->ipath_sendctrl; + + clear_bit(IPATH_S_PIOBUFAVAILUPD, ®); + ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, reg); + ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); + + return 0; +} + static ssize_t ipath_write(struct file *fp, const char __user *data, size_t count, loff_t *off) { @@ -2106,22 +2117,30 @@ static ssize_t ipath_write(struct file *fp, const char __user *data, dest = &cmd.cmd.slave_mask_addr; src = &ucmd->cmd.slave_mask_addr; break; + case IPATH_CMD_PIOAVAILUPD: // force an update of PIOAvail reg + copy = 0; + src = NULL; + dest = NULL; + break; default: ret = -EINVAL; goto bail; } - if ((count - consumed) < copy) { - ret = -EINVAL; - goto bail; - } + if (copy) { + if ((count - consumed) < copy) { + ret = -EINVAL; + goto bail; + } - if (copy_from_user(dest, src, copy)) { - ret = -EFAULT; - goto bail; + if (copy_from_user(dest, src, copy)) { + ret = -EFAULT; + goto bail; + } + + consumed += copy; } - consumed += copy; pd = port_fp(fp); if (!pd && cmd.type != __IPATH_CMD_USER_INIT && cmd.type != IPATH_CMD_ASSIGN_PORT) { @@ -2172,6 +2191,9 @@ static ssize_t ipath_write(struct file *fp, const char __user *data, (void __user *) (unsigned long) cmd.cmd.slave_mask_addr); break; + case IPATH_CMD_PIOAVAILUPD: + ret = ipath_force_pio_avail_update(pd->port_dd); + break; } if (ret >= 0) |