diff options
author | Corentin Labbe <clabbe@baylibre.com> | 2018-01-28 18:08:55 +0300 |
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committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-01-29 00:07:16 +0300 |
commit | 3356c8c0b8da4562e68b4e713279d372fbef6c3c (patch) | |
tree | a4167cb282585b0c1e07858fd35d721973d543ae /drivers/infiniband/hw/qib/qib_keys.c | |
parent | 57ac30c0efd2a3ab0b541b9bb44851f7a0be5d1c (diff) | |
download | linux-3356c8c0b8da4562e68b4e713279d372fbef6c3c.tar.xz |
IB/qib: remove qib_keys.c
qib_keys.c was left uncompilable in commit 7c2e11fe2dbe ("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>
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_keys.c')
-rw-r--r-- | drivers/infiniband/hw/qib/qib_keys.c | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/drivers/infiniband/hw/qib/qib_keys.c b/drivers/infiniband/hw/qib/qib_keys.c deleted file mode 100644 index 8fdf79f8d4e4..000000000000 --- a/drivers/infiniband/hw/qib/qib_keys.c +++ /dev/null @@ -1,235 +0,0 @@ -/* - * 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; -} - |