diff options
| author | Kleber Sacilotto de Souza <klebers@linux.vnet.ibm.com> | 2014-06-04 17:57:50 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-10 01:14:27 +0400 |
| commit | c1f732ad767e37bd1d41043cbdefc0874b4d05e5 (patch) | |
| tree | e4e80d6cd088b93acdb7d8078bb7d726a37f8ffc /drivers/misc/genwqe/card_sysfs.c | |
| parent | fc51768ba24077c8148067036e1555a8a978bb99 (diff) | |
| download | linux-c1f732ad767e37bd1d41043cbdefc0874b4d05e5.tar.xz | |
GenWQE: Add sysfs interface for bitstream reload
This patch adds an interface on sysfs for userspace to request a card
bitstream reload. It sets the appropriate register and try to perform a
fundamental reset on the PCIe slot for the card to reload the bitstream
from the chosen partition.
Signed-off-by: Kleber Sacilotto de Souza <klebers@linux.vnet.ibm.com>
Acked-by: Frank Haverkamp <haver@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/genwqe/card_sysfs.c')
| -rw-r--r-- | drivers/misc/genwqe/card_sysfs.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/misc/genwqe/card_sysfs.c b/drivers/misc/genwqe/card_sysfs.c index a72a99266c3c..7232e40a3ad9 100644 --- a/drivers/misc/genwqe/card_sysfs.c +++ b/drivers/misc/genwqe/card_sysfs.c @@ -223,6 +223,30 @@ static ssize_t next_bitstream_store(struct device *dev, } static DEVICE_ATTR_RW(next_bitstream); +static ssize_t reload_bitstream_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int reload; + struct genwqe_dev *cd = dev_get_drvdata(dev); + + if (kstrtoint(buf, 0, &reload) < 0) + return -EINVAL; + + if (reload == 0x1) { + if (cd->card_state == GENWQE_CARD_UNUSED || + cd->card_state == GENWQE_CARD_USED) + cd->card_state = GENWQE_CARD_RELOAD_BITSTREAM; + else + return -EIO; + } else { + return -EINVAL; + } + + return count; +} +static DEVICE_ATTR_WO(reload_bitstream); + /* * Create device_attribute structures / params: name, mode, show, store * additional flag if valid in VF @@ -239,6 +263,7 @@ static struct attribute *genwqe_attributes[] = { &dev_attr_status.attr, &dev_attr_freerunning_timer.attr, &dev_attr_queue_working_time.attr, + &dev_attr_reload_bitstream.attr, NULL, }; |