diff options
author | Jeff Garzik <jeff@garzik.org> | 2006-09-24 01:52:47 -0400 |
---|---|---|
committer | Jeff Garzik <jeff@garzik.org> | 2006-09-24 01:52:47 -0400 |
commit | 23930fa1cebfea6f79881c588ccd1b0781e49e3f (patch) | |
tree | 36d29e3f83661c4f5f45b6f74ac0d5f9886867a8 /drivers/infiniband/hw/ipath/ipath_diag.c | |
parent | 36b35a5be0e4b406acd816e2122d153e875105be (diff) | |
parent | 4f5537de7c1531398e84e18a24f667e49cc94208 (diff) | |
download | kernel_samsung_smdk4412-23930fa1cebfea6f79881c588ccd1b0781e49e3f.zip kernel_samsung_smdk4412-23930fa1cebfea6f79881c588ccd1b0781e49e3f.tar.gz kernel_samsung_smdk4412-23930fa1cebfea6f79881c588ccd1b0781e49e3f.tar.bz2 |
Merge branch 'master' into upstream
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_diag.c')
-rw-r--r-- | drivers/infiniband/hw/ipath/ipath_diag.c | 155 |
1 files changed, 154 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_diag.c b/drivers/infiniband/hw/ipath/ipath_diag.c index 147dd89..29958b6 100644 --- a/drivers/infiniband/hw/ipath/ipath_diag.c +++ b/drivers/infiniband/hw/ipath/ipath_diag.c @@ -41,11 +41,12 @@ * through the /sys/bus/pci resource mmap interface. */ +#include <linux/io.h> #include <linux/pci.h> +#include <linux/vmalloc.h> #include <asm/uaccess.h> #include "ipath_kernel.h" -#include "ipath_layer.h" #include "ipath_common.h" int ipath_diag_inuse; @@ -274,6 +275,158 @@ bail: return ret; } +static ssize_t ipath_diagpkt_write(struct file *fp, + const char __user *data, + size_t count, loff_t *off); + +static struct file_operations diagpkt_file_ops = { + .owner = THIS_MODULE, + .write = ipath_diagpkt_write, +}; + +static struct cdev *diagpkt_cdev; +static struct class_device *diagpkt_class_dev; + +int __init ipath_diagpkt_add(void) +{ + return ipath_cdev_init(IPATH_DIAGPKT_MINOR, + "ipath_diagpkt", &diagpkt_file_ops, + &diagpkt_cdev, &diagpkt_class_dev); +} + +void __exit ipath_diagpkt_remove(void) +{ + ipath_cdev_cleanup(&diagpkt_cdev, &diagpkt_class_dev); +} + +/** + * ipath_diagpkt_write - write an IB packet + * @fp: the diag data device file pointer + * @data: ipath_diag_pkt structure saying where to get the packet + * @count: size of data to write + * @off: unused by this code + */ +static ssize_t ipath_diagpkt_write(struct file *fp, + const char __user *data, + size_t count, loff_t *off) +{ + u32 __iomem *piobuf; + u32 plen, clen, pbufn; + struct ipath_diag_pkt dp; + u32 *tmpbuf = NULL; + struct ipath_devdata *dd; + ssize_t ret = 0; + u64 val; + + if (count < sizeof(dp)) { + ret = -EINVAL; + goto bail; + } + + if (copy_from_user(&dp, data, sizeof(dp))) { + ret = -EFAULT; + goto bail; + } + + /* send count must be an exact number of dwords */ + if (dp.len & 3) { + ret = -EINVAL; + goto bail; + } + + clen = dp.len >> 2; + + dd = ipath_lookup(dp.unit); + if (!dd || !(dd->ipath_flags & IPATH_PRESENT) || + !dd->ipath_kregbase) { + ipath_cdbg(VERBOSE, "illegal unit %u for diag data send\n", + dp.unit); + ret = -ENODEV; + goto bail; + } + + if (ipath_diag_inuse && !diag_set_link && + !(dd->ipath_flags & IPATH_LINKACTIVE)) { + diag_set_link = 1; + ipath_cdbg(VERBOSE, "Trying to set to set link active for " + "diag pkt\n"); + ipath_set_linkstate(dd, IPATH_IB_LINKARM); + ipath_set_linkstate(dd, IPATH_IB_LINKACTIVE); + } + + if (!(dd->ipath_flags & IPATH_INITTED)) { + /* no hardware, freeze, etc. */ + ipath_cdbg(VERBOSE, "unit %u not usable\n", dd->ipath_unit); + ret = -ENODEV; + goto bail; + } + val = dd->ipath_lastibcstat & IPATH_IBSTATE_MASK; + if (val != IPATH_IBSTATE_INIT && val != IPATH_IBSTATE_ARM && + val != IPATH_IBSTATE_ACTIVE) { + ipath_cdbg(VERBOSE, "unit %u not ready (state %llx)\n", + dd->ipath_unit, (unsigned long long) val); + ret = -EINVAL; + goto bail; + } + + /* need total length before first word written */ + /* +1 word is for the qword padding */ + plen = sizeof(u32) + dp.len; + + if ((plen + 4) > dd->ipath_ibmaxlen) { + ipath_dbg("Pkt len 0x%x > ibmaxlen %x\n", + plen - 4, dd->ipath_ibmaxlen); + ret = -EINVAL; + goto bail; /* before writing pbc */ + } + tmpbuf = vmalloc(plen); + if (!tmpbuf) { + dev_info(&dd->pcidev->dev, "Unable to allocate tmp buffer, " + "failing\n"); + ret = -ENOMEM; + goto bail; + } + + if (copy_from_user(tmpbuf, + (const void __user *) (unsigned long) dp.data, + dp.len)) { + ret = -EFAULT; + goto bail; + } + + piobuf = ipath_getpiobuf(dd, &pbufn); + if (!piobuf) { + ipath_cdbg(VERBOSE, "No PIO buffers avail unit for %u\n", + dd->ipath_unit); + ret = -EBUSY; + goto bail; + } + + plen >>= 2; /* in dwords */ + + if (ipath_debug & __IPATH_PKTDBG) + ipath_cdbg(VERBOSE, "unit %u 0x%x+1w pio%d\n", + dd->ipath_unit, plen - 1, pbufn); + + /* we have to flush after the PBC for correctness on some cpus + * or WC buffer can be written out of order */ + writeq(plen, piobuf); + ipath_flush_wc(); + /* copy all by the trigger word, then flush, so it's written + * to chip before trigger word, then write trigger word, then + * flush again, so packet is sent. */ + __iowrite32_copy(piobuf + 2, tmpbuf, clen - 1); + ipath_flush_wc(); + __raw_writel(tmpbuf[clen - 1], piobuf + clen + 1); + ipath_flush_wc(); + + ret = sizeof(dp); + +bail: + vfree(tmpbuf); + return ret; +} + static int ipath_diag_release(struct inode *in, struct file *fp) { mutex_lock(&ipath_mutex); |