*/
static int hfi1_file_open(struct inode *, struct file *);
static int hfi1_file_close(struct inode *, struct file *);
-static ssize_t hfi1_file_write(struct file *, const char __user *,
- size_t, loff_t *);
static ssize_t hfi1_write_iter(struct kiocb *, struct iov_iter *);
static unsigned int hfi1_poll(struct file *, struct poll_table_struct *);
static int hfi1_file_mmap(struct file *, struct vm_area_struct *);
static const struct file_operations hfi1_file_ops = {
.owner = THIS_MODULE,
- .write = hfi1_file_write,
.write_iter = hfi1_write_iter,
.open = hfi1_file_open,
.release = hfi1_file_close,
return ret;
}
-static ssize_t hfi1_file_write(struct file *fp, const char __user *data,
- size_t count, loff_t *offset)
-{
- const struct hfi1_cmd __user *ucmd;
- struct hfi1_filedata *fd = fp->private_data;
- struct hfi1_ctxtdata *uctxt = fd->uctxt;
- struct hfi1_cmd cmd;
- struct hfi1_user_info uinfo;
- struct hfi1_tid_info tinfo;
- unsigned long addr;
- ssize_t consumed = 0, copy = 0, ret = 0;
- void *dest = NULL;
- __u64 user_val = 0;
- int uctxt_required = 1;
-
- /* FIXME: This interface cannot continue out of staging */
- if (WARN_ON_ONCE(!ib_safe_file_access(fp)))
- return -EACCES;
-
- if (count < sizeof(cmd)) {
- ret = -EINVAL;
- goto bail;
- }
-
- ucmd = (const struct hfi1_cmd __user *)data;
- if (copy_from_user(&cmd, ucmd, sizeof(cmd))) {
- ret = -EFAULT;
- goto bail;
- }
-
- consumed = sizeof(cmd);
-
- switch (cmd.type) {
- case HFI1_CMD_ASSIGN_CTXT:
- uctxt_required = 0; /* assigned user context not required */
- copy = sizeof(uinfo);
- dest = &uinfo;
- break;
- case HFI1_CMD_CREDIT_UPD:
- copy = 0;
- break;
- case HFI1_CMD_TID_UPDATE:
- case HFI1_CMD_TID_FREE:
- case HFI1_CMD_TID_INVAL_READ:
- copy = sizeof(tinfo);
- dest = &tinfo;
- break;
- case HFI1_CMD_USER_INFO:
- case HFI1_CMD_RECV_CTRL:
- case HFI1_CMD_POLL_TYPE:
- case HFI1_CMD_ACK_EVENT:
- case HFI1_CMD_CTXT_INFO:
- case HFI1_CMD_SET_PKEY:
- case HFI1_CMD_CTXT_RESET:
- copy = 0;
- user_val = cmd.addr;
- break;
- default:
- ret = -EINVAL;
- goto bail;
- }
-
- /* If the command comes with user data, copy it. */
- if (copy) {
- if (copy_from_user(dest, (void __user *)cmd.addr, copy)) {
- ret = -EFAULT;
- goto bail;
- }
- consumed += copy;
- }
-
- /*
- * Make sure there is a uctxt when needed.
- */
- if (uctxt_required && !uctxt) {
- ret = -EINVAL;
- goto bail;
- }
-
- switch (cmd.type) {
- case HFI1_CMD_ASSIGN_CTXT:
- ret = assign_ctxt(fp, &uinfo);
- if (ret < 0)
- goto bail;
- ret = setup_ctxt(fp);
- if (ret)
- goto bail;
- ret = user_init(fp);
- break;
- case HFI1_CMD_CTXT_INFO:
- ret = get_ctxt_info(fp, (void __user *)(unsigned long)
- user_val, cmd.len);
- break;
- case HFI1_CMD_USER_INFO:
- ret = get_base_info(fp, (void __user *)(unsigned long)
- user_val, cmd.len);
- break;
- case HFI1_CMD_CREDIT_UPD:
- if (uctxt && uctxt->sc)
- sc_return_credits(uctxt->sc);
- break;
- case HFI1_CMD_TID_UPDATE:
- ret = hfi1_user_exp_rcv_setup(fp, &tinfo);
- if (!ret) {
- /*
- * Copy the number of tidlist entries we used
- * and the length of the buffer we registered.
- * These fields are adjacent in the structure so
- * we can copy them at the same time.
- */
- addr = (unsigned long)cmd.addr +
- offsetof(struct hfi1_tid_info, tidcnt);
- if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
- sizeof(tinfo.tidcnt) +
- sizeof(tinfo.length)))
- ret = -EFAULT;
- }
- break;
- case HFI1_CMD_TID_INVAL_READ:
- ret = hfi1_user_exp_rcv_invalid(fp, &tinfo);
- if (ret)
- break;
- addr = (unsigned long)cmd.addr +
- offsetof(struct hfi1_tid_info, tidcnt);
- if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
- sizeof(tinfo.tidcnt)))
- ret = -EFAULT;
- break;
- case HFI1_CMD_TID_FREE:
- ret = hfi1_user_exp_rcv_clear(fp, &tinfo);
- if (ret)
- break;
- addr = (unsigned long)cmd.addr +
- offsetof(struct hfi1_tid_info, tidcnt);
- if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
- sizeof(tinfo.tidcnt)))
- ret = -EFAULT;
- break;
- case HFI1_CMD_RECV_CTRL:
- ret = manage_rcvq(uctxt, fd->subctxt, (int)user_val);
- break;
- case HFI1_CMD_POLL_TYPE:
- uctxt->poll_type = (typeof(uctxt->poll_type))user_val;
- break;
- case HFI1_CMD_ACK_EVENT:
- ret = user_event_ack(uctxt, fd->subctxt, user_val);
- break;
- case HFI1_CMD_SET_PKEY:
- if (HFI1_CAP_IS_USET(PKEY_CHECK))
- ret = set_ctxt_pkey(uctxt, fd->subctxt, user_val);
- else
- ret = -EPERM;
- break;
- case HFI1_CMD_CTXT_RESET: {
- struct send_context *sc;
- struct hfi1_devdata *dd;
-
- if (!uctxt || !uctxt->dd || !uctxt->sc) {
- ret = -EINVAL;
- break;
- }
- /*
- * There is no protection here. User level has to
- * guarantee that no one will be writing to the send
- * context while it is being re-initialized.
- * If user level breaks that guarantee, it will break
- * it's own context and no one else's.
- */
- dd = uctxt->dd;
- sc = uctxt->sc;
- /*
- * Wait until the interrupt handler has marked the
- * context as halted or frozen. Report error if we time
- * out.
- */
- wait_event_interruptible_timeout(
- sc->halt_wait, (sc->flags & SCF_HALTED),
- msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT));
- if (!(sc->flags & SCF_HALTED)) {
- ret = -ENOLCK;
- break;
- }
- /*
- * If the send context was halted due to a Freeze,
- * wait until the device has been "unfrozen" before
- * resetting the context.
- */
- if (sc->flags & SCF_FROZEN) {
- wait_event_interruptible_timeout(
- dd->event_queue,
- !(ACCESS_ONCE(dd->flags) & HFI1_FROZEN),
- msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT));
- if (dd->flags & HFI1_FROZEN) {
- ret = -ENOLCK;
- break;
- }
- if (dd->flags & HFI1_FORCED_FREEZE) {
- /*
- * Don't allow context reset if we are into
- * forced freeze
- */
- ret = -ENODEV;
- break;
- }
- sc_disable(sc);
- ret = sc_enable(sc);
- hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_ENB,
- uctxt->ctxt);
- } else {
- ret = sc_restart(sc);
- }
- if (!ret)
- sc_return_credits(sc);
- break;
- }
- }
-
- if (ret >= 0)
- ret = consumed;
-bail:
- return ret;
-}
-
static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from)
{
struct hfi1_filedata *fd = kiocb->ki_filp->private_data;
projects / cascardo / linux.git / commitdiff