IB/qib: remove qib_keys.c

qib_keys.c was left uncompilable in commit 7c2e11fe ("IB/qib: Remove qp and mr functionality from qib")
Since nothing need it, remove it from tree.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/qib/qib_keys.c

-/*
- * Copyright (c) 2006, 2007, 2009 QLogic Corporation. All rights reserved.
- * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include "qib.h"
-
-/**
- * qib_alloc_lkey - allocate an lkey
- * @mr: memory region that this lkey protects
- * @dma_region: 0->normal key, 1->restricted DMA key
- *
- * Returns 0 if successful, otherwise returns -errno.
- *
- * Increments mr reference count as required.
- *
- * Sets the lkey field mr for non-dma regions.
- *
- */
-
-int qib_alloc_lkey(struct rvt_mregion *mr, int dma_region)
-{
-	unsigned long flags;
-	u32 r;
-	u32 n;
-	int ret = 0;
-	struct qib_ibdev *dev = to_idev(mr->pd->device);
-	struct rvt_lkey_table *rkt = &dev->lk_table;
-
-	spin_lock_irqsave(&rkt->lock, flags);
-
-	/* special case for dma_mr lkey == 0 */
-	if (dma_region) {
-		struct rvt_mregion *tmr;
-
-		tmr = rcu_access_pointer(dev->dma_mr);
-		if (!tmr) {
-			qib_get_mr(mr);
-			rcu_assign_pointer(dev->dma_mr, mr);
-			mr->lkey_published = 1;
-		}
-		goto success;
-	}
-
-	/* Find the next available LKEY */
-	r = rkt->next;
-	n = r;
-	for (;;) {
-		if (rkt->table[r] == NULL)
-			break;
-		r = (r + 1) & (rkt->max - 1);
-		if (r == n)
-			goto bail;
-	}
-	rkt->next = (r + 1) & (rkt->max - 1);
-	/*
-	 * Make sure lkey is never zero which is reserved to indicate an
-	 * unrestricted LKEY.
-	 */
-	rkt->gen++;
-	/*
-	 * bits are capped in qib_verbs.c to insure enough bits
-	 * for generation number
-	 */
-	mr->lkey = (r << (32 - ib_rvt_lkey_table_size)) |
-		((((1 << (24 - ib_rvt_lkey_table_size)) - 1) & rkt->gen)
-		 << 8);
-	if (mr->lkey == 0) {
-		mr->lkey |= 1 << 8;
-		rkt->gen++;
-	}
-	qib_get_mr(mr);
-	rcu_assign_pointer(rkt->table[r], mr);
-	mr->lkey_published = 1;
-success:
-	spin_unlock_irqrestore(&rkt->lock, flags);
-out:
-	return ret;
-bail:
-	spin_unlock_irqrestore(&rkt->lock, flags);
-	ret = -ENOMEM;
-	goto out;
-}
-
-/**
- * qib_free_lkey - free an lkey
- * @mr: mr to free from tables
- */
-void qib_free_lkey(struct rvt_mregion *mr)
-{
-	unsigned long flags;
-	u32 lkey = mr->lkey;
-	u32 r;
-	struct qib_ibdev *dev = to_idev(mr->pd->device);
-	struct rvt_lkey_table *rkt = &dev->lk_table;
-
-	spin_lock_irqsave(&rkt->lock, flags);
-	if (!mr->lkey_published)
-		goto out;
-	if (lkey == 0)
-		RCU_INIT_POINTER(dev->dma_mr, NULL);
-	else {
-		r = lkey >> (32 - ib_rvt_lkey_table_size);
-		RCU_INIT_POINTER(rkt->table[r], NULL);
-	}
-	qib_put_mr(mr);
-	mr->lkey_published = 0;
-out:
-	spin_unlock_irqrestore(&rkt->lock, flags);
-}
-
-/**
- * qib_rkey_ok - check the IB virtual address, length, and RKEY
- * @qp: qp for validation
- * @sge: SGE state
- * @len: length of data
- * @vaddr: virtual address to place data
- * @rkey: rkey to check
- * @acc: access flags
- *
- * Return 1 if successful, otherwise 0.
- *
- * increments the reference count upon success
- */
-int qib_rkey_ok(struct rvt_qp *qp, struct rvt_sge *sge,
-		u32 len, u64 vaddr, u32 rkey, int acc)
-{
-	struct rvt_lkey_table *rkt = &to_idev(qp->ibqp.device)->lk_table;
-	struct rvt_mregion *mr;
-	unsigned n, m;
-	size_t off;
-
-	/* We use RKEY == zero for kernel virtual addresses */
-	rcu_read_lock();
-	if (rkey == 0) {
-		struct rvt_pd *pd = ibpd_to_rvtpd(qp->ibqp.pd);
-		struct qib_ibdev *dev = to_idev(pd->ibpd.device);
-
-		if (pd->user)
-			goto bail;
-		mr = rcu_dereference(dev->dma_mr);
-		if (!mr)
-			goto bail;
-		if (unlikely(!atomic_inc_not_zero(&mr->refcount)))
-			goto bail;
-		rcu_read_unlock();
-
-		sge->mr = mr;
-		sge->vaddr = (void *) vaddr;
-		sge->length = len;
-		sge->sge_length = len;
-		sge->m = 0;
-		sge->n = 0;
-		goto ok;
-	}
-
-	mr = rcu_dereference(
-		rkt->table[(rkey >> (32 - ib_rvt_lkey_table_size))]);
-	if (unlikely(!mr || mr->lkey != rkey || qp->ibqp.pd != mr->pd))
-		goto bail;
-
-	off = vaddr - mr->iova;
-	if (unlikely(vaddr < mr->iova || off + len > mr->length ||
-		     (mr->access_flags & acc) == 0))
-		goto bail;
-	if (unlikely(!atomic_inc_not_zero(&mr->refcount)))
-		goto bail;
-	rcu_read_unlock();
-
-	off += mr->offset;
-	if (mr->page_shift) {
-		/*
-		page sizes are uniform power of 2 so no loop is necessary
-		entries_spanned_by_off is the number of times the loop below
-		would have executed.
-		*/
-		size_t entries_spanned_by_off;
-
-		entries_spanned_by_off = off >> mr->page_shift;
-		off -= (entries_spanned_by_off << mr->page_shift);
-		m = entries_spanned_by_off / RVT_SEGSZ;
-		n = entries_spanned_by_off % RVT_SEGSZ;
-	} else {
-		m = 0;
-		n = 0;
-		while (off >= mr->map[m]->segs[n].length) {
-			off -= mr->map[m]->segs[n].length;
-			n++;
-			if (n >= RVT_SEGSZ) {
-				m++;
-				n = 0;
-			}
-		}
-	}
-	sge->mr = mr;
-	sge->vaddr = mr->map[m]->segs[n].vaddr + off;
-	sge->length = mr->map[m]->segs[n].length - off;
-	sge->sge_length = len;
-	sge->m = m;
-	sge->n = n;
-ok:
-	return 1;
-bail:
-	rcu_read_unlock();
-	return 0;
-}
-