From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/infiniband/hw/qib/qib_mr.c | 532 ++++++++++++++++++++++++++++++ 1 file changed, 532 insertions(+) create mode 100644 kernel/drivers/infiniband/hw/qib/qib_mr.c (limited to 'kernel/drivers/infiniband/hw/qib/qib_mr.c') diff --git a/kernel/drivers/infiniband/hw/qib/qib_mr.c b/kernel/drivers/infiniband/hw/qib/qib_mr.c new file mode 100644 index 000000000..c4473db46 --- /dev/null +++ b/kernel/drivers/infiniband/hw/qib/qib_mr.c @@ -0,0 +1,532 @@ +/* + * Copyright (c) 2006, 2007, 2008, 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 +#include + +#include "qib.h" + +/* Fast memory region */ +struct qib_fmr { + struct ib_fmr ibfmr; + struct qib_mregion mr; /* must be last */ +}; + +static inline struct qib_fmr *to_ifmr(struct ib_fmr *ibfmr) +{ + return container_of(ibfmr, struct qib_fmr, ibfmr); +} + +static int init_qib_mregion(struct qib_mregion *mr, struct ib_pd *pd, + int count) +{ + int m, i = 0; + int rval = 0; + + m = (count + QIB_SEGSZ - 1) / QIB_SEGSZ; + for (; i < m; i++) { + mr->map[i] = kzalloc(sizeof(*mr->map[0]), GFP_KERNEL); + if (!mr->map[i]) + goto bail; + } + mr->mapsz = m; + init_completion(&mr->comp); + /* count returning the ptr to user */ + atomic_set(&mr->refcount, 1); + mr->pd = pd; + mr->max_segs = count; +out: + return rval; +bail: + while (i) + kfree(mr->map[--i]); + rval = -ENOMEM; + goto out; +} + +static void deinit_qib_mregion(struct qib_mregion *mr) +{ + int i = mr->mapsz; + + mr->mapsz = 0; + while (i) + kfree(mr->map[--i]); +} + + +/** + * qib_get_dma_mr - get a DMA memory region + * @pd: protection domain for this memory region + * @acc: access flags + * + * Returns the memory region on success, otherwise returns an errno. + * Note that all DMA addresses should be created via the + * struct ib_dma_mapping_ops functions (see qib_dma.c). + */ +struct ib_mr *qib_get_dma_mr(struct ib_pd *pd, int acc) +{ + struct qib_mr *mr = NULL; + struct ib_mr *ret; + int rval; + + if (to_ipd(pd)->user) { + ret = ERR_PTR(-EPERM); + goto bail; + } + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) { + ret = ERR_PTR(-ENOMEM); + goto bail; + } + + rval = init_qib_mregion(&mr->mr, pd, 0); + if (rval) { + ret = ERR_PTR(rval); + goto bail; + } + + + rval = qib_alloc_lkey(&mr->mr, 1); + if (rval) { + ret = ERR_PTR(rval); + goto bail_mregion; + } + + mr->mr.access_flags = acc; + ret = &mr->ibmr; +done: + return ret; + +bail_mregion: + deinit_qib_mregion(&mr->mr); +bail: + kfree(mr); + goto done; +} + +static struct qib_mr *alloc_mr(int count, struct ib_pd *pd) +{ + struct qib_mr *mr; + int rval = -ENOMEM; + int m; + + /* Allocate struct plus pointers to first level page tables. */ + m = (count + QIB_SEGSZ - 1) / QIB_SEGSZ; + mr = kzalloc(sizeof(*mr) + m * sizeof(mr->mr.map[0]), GFP_KERNEL); + if (!mr) + goto bail; + + rval = init_qib_mregion(&mr->mr, pd, count); + if (rval) + goto bail; + /* + * ib_reg_phys_mr() will initialize mr->ibmr except for + * lkey and rkey. + */ + rval = qib_alloc_lkey(&mr->mr, 0); + if (rval) + goto bail_mregion; + mr->ibmr.lkey = mr->mr.lkey; + mr->ibmr.rkey = mr->mr.lkey; +done: + return mr; + +bail_mregion: + deinit_qib_mregion(&mr->mr); +bail: + kfree(mr); + mr = ERR_PTR(rval); + goto done; +} + +/** + * qib_reg_phys_mr - register a physical memory region + * @pd: protection domain for this memory region + * @buffer_list: pointer to the list of physical buffers to register + * @num_phys_buf: the number of physical buffers to register + * @iova_start: the starting address passed over IB which maps to this MR + * + * Returns the memory region on success, otherwise returns an errno. + */ +struct ib_mr *qib_reg_phys_mr(struct ib_pd *pd, + struct ib_phys_buf *buffer_list, + int num_phys_buf, int acc, u64 *iova_start) +{ + struct qib_mr *mr; + int n, m, i; + struct ib_mr *ret; + + mr = alloc_mr(num_phys_buf, pd); + if (IS_ERR(mr)) { + ret = (struct ib_mr *)mr; + goto bail; + } + + mr->mr.user_base = *iova_start; + mr->mr.iova = *iova_start; + mr->mr.access_flags = acc; + + m = 0; + n = 0; + for (i = 0; i < num_phys_buf; i++) { + mr->mr.map[m]->segs[n].vaddr = (void *) buffer_list[i].addr; + mr->mr.map[m]->segs[n].length = buffer_list[i].size; + mr->mr.length += buffer_list[i].size; + n++; + if (n == QIB_SEGSZ) { + m++; + n = 0; + } + } + + ret = &mr->ibmr; + +bail: + return ret; +} + +/** + * qib_reg_user_mr - register a userspace memory region + * @pd: protection domain for this memory region + * @start: starting userspace address + * @length: length of region to register + * @mr_access_flags: access flags for this memory region + * @udata: unused by the QLogic_IB driver + * + * Returns the memory region on success, otherwise returns an errno. + */ +struct ib_mr *qib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, + u64 virt_addr, int mr_access_flags, + struct ib_udata *udata) +{ + struct qib_mr *mr; + struct ib_umem *umem; + struct scatterlist *sg; + int n, m, entry; + struct ib_mr *ret; + + if (length == 0) { + ret = ERR_PTR(-EINVAL); + goto bail; + } + + umem = ib_umem_get(pd->uobject->context, start, length, + mr_access_flags, 0); + if (IS_ERR(umem)) + return (void *) umem; + + n = umem->nmap; + + mr = alloc_mr(n, pd); + if (IS_ERR(mr)) { + ret = (struct ib_mr *)mr; + ib_umem_release(umem); + goto bail; + } + + mr->mr.user_base = start; + mr->mr.iova = virt_addr; + mr->mr.length = length; + mr->mr.offset = ib_umem_offset(umem); + mr->mr.access_flags = mr_access_flags; + mr->umem = umem; + + if (is_power_of_2(umem->page_size)) + mr->mr.page_shift = ilog2(umem->page_size); + m = 0; + n = 0; + for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) { + void *vaddr; + + vaddr = page_address(sg_page(sg)); + if (!vaddr) { + ret = ERR_PTR(-EINVAL); + goto bail; + } + mr->mr.map[m]->segs[n].vaddr = vaddr; + mr->mr.map[m]->segs[n].length = umem->page_size; + n++; + if (n == QIB_SEGSZ) { + m++; + n = 0; + } + } + ret = &mr->ibmr; + +bail: + return ret; +} + +/** + * qib_dereg_mr - unregister and free a memory region + * @ibmr: the memory region to free + * + * Returns 0 on success. + * + * Note that this is called to free MRs created by qib_get_dma_mr() + * or qib_reg_user_mr(). + */ +int qib_dereg_mr(struct ib_mr *ibmr) +{ + struct qib_mr *mr = to_imr(ibmr); + int ret = 0; + unsigned long timeout; + + qib_free_lkey(&mr->mr); + + qib_put_mr(&mr->mr); /* will set completion if last */ + timeout = wait_for_completion_timeout(&mr->mr.comp, + 5 * HZ); + if (!timeout) { + qib_get_mr(&mr->mr); + ret = -EBUSY; + goto out; + } + deinit_qib_mregion(&mr->mr); + if (mr->umem) + ib_umem_release(mr->umem); + kfree(mr); +out: + return ret; +} + +/* + * Allocate a memory region usable with the + * IB_WR_FAST_REG_MR send work request. + * + * Return the memory region on success, otherwise return an errno. + */ +struct ib_mr *qib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len) +{ + struct qib_mr *mr; + + mr = alloc_mr(max_page_list_len, pd); + if (IS_ERR(mr)) + return (struct ib_mr *)mr; + + return &mr->ibmr; +} + +struct ib_fast_reg_page_list * +qib_alloc_fast_reg_page_list(struct ib_device *ibdev, int page_list_len) +{ + unsigned size = page_list_len * sizeof(u64); + struct ib_fast_reg_page_list *pl; + + if (size > PAGE_SIZE) + return ERR_PTR(-EINVAL); + + pl = kzalloc(sizeof(*pl), GFP_KERNEL); + if (!pl) + return ERR_PTR(-ENOMEM); + + pl->page_list = kzalloc(size, GFP_KERNEL); + if (!pl->page_list) + goto err_free; + + return pl; + +err_free: + kfree(pl); + return ERR_PTR(-ENOMEM); +} + +void qib_free_fast_reg_page_list(struct ib_fast_reg_page_list *pl) +{ + kfree(pl->page_list); + kfree(pl); +} + +/** + * qib_alloc_fmr - allocate a fast memory region + * @pd: the protection domain for this memory region + * @mr_access_flags: access flags for this memory region + * @fmr_attr: fast memory region attributes + * + * Returns the memory region on success, otherwise returns an errno. + */ +struct ib_fmr *qib_alloc_fmr(struct ib_pd *pd, int mr_access_flags, + struct ib_fmr_attr *fmr_attr) +{ + struct qib_fmr *fmr; + int m; + struct ib_fmr *ret; + int rval = -ENOMEM; + + /* Allocate struct plus pointers to first level page tables. */ + m = (fmr_attr->max_pages + QIB_SEGSZ - 1) / QIB_SEGSZ; + fmr = kzalloc(sizeof(*fmr) + m * sizeof(fmr->mr.map[0]), GFP_KERNEL); + if (!fmr) + goto bail; + + rval = init_qib_mregion(&fmr->mr, pd, fmr_attr->max_pages); + if (rval) + goto bail; + + /* + * ib_alloc_fmr() will initialize fmr->ibfmr except for lkey & + * rkey. + */ + rval = qib_alloc_lkey(&fmr->mr, 0); + if (rval) + goto bail_mregion; + fmr->ibfmr.rkey = fmr->mr.lkey; + fmr->ibfmr.lkey = fmr->mr.lkey; + /* + * Resources are allocated but no valid mapping (RKEY can't be + * used). + */ + fmr->mr.access_flags = mr_access_flags; + fmr->mr.max_segs = fmr_attr->max_pages; + fmr->mr.page_shift = fmr_attr->page_shift; + + ret = &fmr->ibfmr; +done: + return ret; + +bail_mregion: + deinit_qib_mregion(&fmr->mr); +bail: + kfree(fmr); + ret = ERR_PTR(rval); + goto done; +} + +/** + * qib_map_phys_fmr - set up a fast memory region + * @ibmfr: the fast memory region to set up + * @page_list: the list of pages to associate with the fast memory region + * @list_len: the number of pages to associate with the fast memory region + * @iova: the virtual address of the start of the fast memory region + * + * This may be called from interrupt context. + */ + +int qib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, + int list_len, u64 iova) +{ + struct qib_fmr *fmr = to_ifmr(ibfmr); + struct qib_lkey_table *rkt; + unsigned long flags; + int m, n, i; + u32 ps; + int ret; + + i = atomic_read(&fmr->mr.refcount); + if (i > 2) + return -EBUSY; + + if (list_len > fmr->mr.max_segs) { + ret = -EINVAL; + goto bail; + } + rkt = &to_idev(ibfmr->device)->lk_table; + spin_lock_irqsave(&rkt->lock, flags); + fmr->mr.user_base = iova; + fmr->mr.iova = iova; + ps = 1 << fmr->mr.page_shift; + fmr->mr.length = list_len * ps; + m = 0; + n = 0; + for (i = 0; i < list_len; i++) { + fmr->mr.map[m]->segs[n].vaddr = (void *) page_list[i]; + fmr->mr.map[m]->segs[n].length = ps; + if (++n == QIB_SEGSZ) { + m++; + n = 0; + } + } + spin_unlock_irqrestore(&rkt->lock, flags); + ret = 0; + +bail: + return ret; +} + +/** + * qib_unmap_fmr - unmap fast memory regions + * @fmr_list: the list of fast memory regions to unmap + * + * Returns 0 on success. + */ +int qib_unmap_fmr(struct list_head *fmr_list) +{ + struct qib_fmr *fmr; + struct qib_lkey_table *rkt; + unsigned long flags; + + list_for_each_entry(fmr, fmr_list, ibfmr.list) { + rkt = &to_idev(fmr->ibfmr.device)->lk_table; + spin_lock_irqsave(&rkt->lock, flags); + fmr->mr.user_base = 0; + fmr->mr.iova = 0; + fmr->mr.length = 0; + spin_unlock_irqrestore(&rkt->lock, flags); + } + return 0; +} + +/** + * qib_dealloc_fmr - deallocate a fast memory region + * @ibfmr: the fast memory region to deallocate + * + * Returns 0 on success. + */ +int qib_dealloc_fmr(struct ib_fmr *ibfmr) +{ + struct qib_fmr *fmr = to_ifmr(ibfmr); + int ret = 0; + unsigned long timeout; + + qib_free_lkey(&fmr->mr); + qib_put_mr(&fmr->mr); /* will set completion if last */ + timeout = wait_for_completion_timeout(&fmr->mr.comp, + 5 * HZ); + if (!timeout) { + qib_get_mr(&fmr->mr); + ret = -EBUSY; + goto out; + } + deinit_qib_mregion(&fmr->mr); + kfree(fmr); +out: + return ret; +} + +void mr_rcu_callback(struct rcu_head *list) +{ + struct qib_mregion *mr = container_of(list, struct qib_mregion, list); + + complete(&mr->comp); +} -- cgit 1.2.3-korg