![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
405 lines
12 KiB
C
405 lines
12 KiB
C
/*
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* IBM eServer eHCA Infiniband device driver for Linux on POWER
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*
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* Completion queue handling
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*
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* Authors: Waleri Fomin <fomin@de.ibm.com>
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* Khadija Souissi <souissi@de.ibm.com>
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* Reinhard Ernst <rernst@de.ibm.com>
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* Heiko J Schick <schickhj@de.ibm.com>
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* Hoang-Nam Nguyen <hnguyen@de.ibm.com>
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*
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*
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* Copyright (c) 2005 IBM Corporation
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*
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* All rights reserved.
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*
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* This source code is distributed under a dual license of GPL v2.0 and OpenIB
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* BSD.
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*
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* OpenIB BSD License
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/slab.h>
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#include "ehca_iverbs.h"
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#include "ehca_classes.h"
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#include "ehca_irq.h"
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#include "hcp_if.h"
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static struct kmem_cache *cq_cache;
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int ehca_cq_assign_qp(struct ehca_cq *cq, struct ehca_qp *qp)
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{
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unsigned int qp_num = qp->real_qp_num;
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unsigned int key = qp_num & (QP_HASHTAB_LEN-1);
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unsigned long flags;
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spin_lock_irqsave(&cq->spinlock, flags);
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hlist_add_head(&qp->list_entries, &cq->qp_hashtab[key]);
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spin_unlock_irqrestore(&cq->spinlock, flags);
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ehca_dbg(cq->ib_cq.device, "cq_num=%x real_qp_num=%x",
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cq->cq_number, qp_num);
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return 0;
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}
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int ehca_cq_unassign_qp(struct ehca_cq *cq, unsigned int real_qp_num)
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{
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int ret = -EINVAL;
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unsigned int key = real_qp_num & (QP_HASHTAB_LEN-1);
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struct hlist_node *iter;
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struct ehca_qp *qp;
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unsigned long flags;
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spin_lock_irqsave(&cq->spinlock, flags);
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hlist_for_each(iter, &cq->qp_hashtab[key]) {
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qp = hlist_entry(iter, struct ehca_qp, list_entries);
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if (qp->real_qp_num == real_qp_num) {
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hlist_del(iter);
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ehca_dbg(cq->ib_cq.device,
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"removed qp from cq .cq_num=%x real_qp_num=%x",
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cq->cq_number, real_qp_num);
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ret = 0;
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break;
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}
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}
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spin_unlock_irqrestore(&cq->spinlock, flags);
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if (ret)
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ehca_err(cq->ib_cq.device,
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"qp not found cq_num=%x real_qp_num=%x",
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cq->cq_number, real_qp_num);
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return ret;
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}
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struct ehca_qp *ehca_cq_get_qp(struct ehca_cq *cq, int real_qp_num)
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{
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struct ehca_qp *ret = NULL;
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unsigned int key = real_qp_num & (QP_HASHTAB_LEN-1);
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struct hlist_node *iter;
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struct ehca_qp *qp;
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hlist_for_each(iter, &cq->qp_hashtab[key]) {
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qp = hlist_entry(iter, struct ehca_qp, list_entries);
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if (qp->real_qp_num == real_qp_num) {
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ret = qp;
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break;
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}
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}
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return ret;
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}
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struct ib_cq *ehca_create_cq(struct ib_device *device, int cqe, int comp_vector,
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struct ib_ucontext *context,
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struct ib_udata *udata)
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{
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static const u32 additional_cqe = 20;
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struct ib_cq *cq;
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struct ehca_cq *my_cq;
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struct ehca_shca *shca =
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container_of(device, struct ehca_shca, ib_device);
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struct ipz_adapter_handle adapter_handle;
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struct ehca_alloc_cq_parms param; /* h_call's out parameters */
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struct h_galpa gal;
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void *vpage;
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u32 counter;
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u64 rpage, cqx_fec, h_ret;
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int ipz_rc, ret, i;
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unsigned long flags;
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if (cqe >= 0xFFFFFFFF - 64 - additional_cqe)
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return ERR_PTR(-EINVAL);
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if (!atomic_add_unless(&shca->num_cqs, 1, shca->max_num_cqs)) {
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ehca_err(device, "Unable to create CQ, max number of %i "
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"CQs reached.", shca->max_num_cqs);
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ehca_err(device, "To increase the maximum number of CQs "
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"use the number_of_cqs module parameter.\n");
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return ERR_PTR(-ENOSPC);
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}
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my_cq = kmem_cache_zalloc(cq_cache, GFP_KERNEL);
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if (!my_cq) {
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ehca_err(device, "Out of memory for ehca_cq struct device=%p",
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device);
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atomic_dec(&shca->num_cqs);
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return ERR_PTR(-ENOMEM);
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}
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memset(¶m, 0, sizeof(struct ehca_alloc_cq_parms));
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spin_lock_init(&my_cq->spinlock);
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spin_lock_init(&my_cq->cb_lock);
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spin_lock_init(&my_cq->task_lock);
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atomic_set(&my_cq->nr_events, 0);
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init_waitqueue_head(&my_cq->wait_completion);
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cq = &my_cq->ib_cq;
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adapter_handle = shca->ipz_hca_handle;
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param.eq_handle = shca->eq.ipz_eq_handle;
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do {
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if (!idr_pre_get(&ehca_cq_idr, GFP_KERNEL)) {
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cq = ERR_PTR(-ENOMEM);
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ehca_err(device, "Can't reserve idr nr. device=%p",
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device);
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goto create_cq_exit1;
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}
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write_lock_irqsave(&ehca_cq_idr_lock, flags);
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ret = idr_get_new(&ehca_cq_idr, my_cq, &my_cq->token);
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write_unlock_irqrestore(&ehca_cq_idr_lock, flags);
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} while (ret == -EAGAIN);
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if (ret) {
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cq = ERR_PTR(-ENOMEM);
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ehca_err(device, "Can't allocate new idr entry. device=%p",
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device);
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goto create_cq_exit1;
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}
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if (my_cq->token > 0x1FFFFFF) {
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cq = ERR_PTR(-ENOMEM);
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ehca_err(device, "Invalid number of cq. device=%p", device);
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goto create_cq_exit2;
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}
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/*
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* CQs maximum depth is 4GB-64, but we need additional 20 as buffer
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* for receiving errors CQEs.
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*/
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param.nr_cqe = cqe + additional_cqe;
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h_ret = hipz_h_alloc_resource_cq(adapter_handle, my_cq, ¶m);
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if (h_ret != H_SUCCESS) {
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ehca_err(device, "hipz_h_alloc_resource_cq() failed "
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"h_ret=%lli device=%p", h_ret, device);
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cq = ERR_PTR(ehca2ib_return_code(h_ret));
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goto create_cq_exit2;
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}
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ipz_rc = ipz_queue_ctor(NULL, &my_cq->ipz_queue, param.act_pages,
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EHCA_PAGESIZE, sizeof(struct ehca_cqe), 0, 0);
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if (!ipz_rc) {
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ehca_err(device, "ipz_queue_ctor() failed ipz_rc=%i device=%p",
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ipz_rc, device);
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cq = ERR_PTR(-EINVAL);
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goto create_cq_exit3;
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}
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for (counter = 0; counter < param.act_pages; counter++) {
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vpage = ipz_qpageit_get_inc(&my_cq->ipz_queue);
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if (!vpage) {
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ehca_err(device, "ipz_qpageit_get_inc() "
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"returns NULL device=%p", device);
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cq = ERR_PTR(-EAGAIN);
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goto create_cq_exit4;
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}
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rpage = virt_to_abs(vpage);
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h_ret = hipz_h_register_rpage_cq(adapter_handle,
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my_cq->ipz_cq_handle,
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&my_cq->pf,
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0,
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0,
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rpage,
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1,
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my_cq->galpas.
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kernel);
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if (h_ret < H_SUCCESS) {
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ehca_err(device, "hipz_h_register_rpage_cq() failed "
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"ehca_cq=%p cq_num=%x h_ret=%lli counter=%i "
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"act_pages=%i", my_cq, my_cq->cq_number,
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h_ret, counter, param.act_pages);
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cq = ERR_PTR(-EINVAL);
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goto create_cq_exit4;
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}
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if (counter == (param.act_pages - 1)) {
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vpage = ipz_qpageit_get_inc(&my_cq->ipz_queue);
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if ((h_ret != H_SUCCESS) || vpage) {
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ehca_err(device, "Registration of pages not "
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"complete ehca_cq=%p cq_num=%x "
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"h_ret=%lli", my_cq, my_cq->cq_number,
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h_ret);
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cq = ERR_PTR(-EAGAIN);
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goto create_cq_exit4;
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}
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} else {
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if (h_ret != H_PAGE_REGISTERED) {
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ehca_err(device, "Registration of page failed "
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"ehca_cq=%p cq_num=%x h_ret=%lli "
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"counter=%i act_pages=%i",
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my_cq, my_cq->cq_number,
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h_ret, counter, param.act_pages);
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cq = ERR_PTR(-ENOMEM);
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goto create_cq_exit4;
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}
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}
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}
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ipz_qeit_reset(&my_cq->ipz_queue);
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gal = my_cq->galpas.kernel;
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cqx_fec = hipz_galpa_load(gal, CQTEMM_OFFSET(cqx_fec));
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ehca_dbg(device, "ehca_cq=%p cq_num=%x CQX_FEC=%llx",
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my_cq, my_cq->cq_number, cqx_fec);
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my_cq->ib_cq.cqe = my_cq->nr_of_entries =
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param.act_nr_of_entries - additional_cqe;
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my_cq->cq_number = (my_cq->ipz_cq_handle.handle) & 0xffff;
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for (i = 0; i < QP_HASHTAB_LEN; i++)
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INIT_HLIST_HEAD(&my_cq->qp_hashtab[i]);
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INIT_LIST_HEAD(&my_cq->sqp_err_list);
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INIT_LIST_HEAD(&my_cq->rqp_err_list);
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if (context) {
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struct ipz_queue *ipz_queue = &my_cq->ipz_queue;
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struct ehca_create_cq_resp resp;
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memset(&resp, 0, sizeof(resp));
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resp.cq_number = my_cq->cq_number;
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resp.token = my_cq->token;
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resp.ipz_queue.qe_size = ipz_queue->qe_size;
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resp.ipz_queue.act_nr_of_sg = ipz_queue->act_nr_of_sg;
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resp.ipz_queue.queue_length = ipz_queue->queue_length;
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resp.ipz_queue.pagesize = ipz_queue->pagesize;
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resp.ipz_queue.toggle_state = ipz_queue->toggle_state;
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resp.fw_handle_ofs = (u32)
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(my_cq->galpas.user.fw_handle & (PAGE_SIZE - 1));
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if (ib_copy_to_udata(udata, &resp, sizeof(resp))) {
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ehca_err(device, "Copy to udata failed.");
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goto create_cq_exit4;
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}
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}
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return cq;
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create_cq_exit4:
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ipz_queue_dtor(NULL, &my_cq->ipz_queue);
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create_cq_exit3:
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h_ret = hipz_h_destroy_cq(adapter_handle, my_cq, 1);
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if (h_ret != H_SUCCESS)
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ehca_err(device, "hipz_h_destroy_cq() failed ehca_cq=%p "
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"cq_num=%x h_ret=%lli", my_cq, my_cq->cq_number, h_ret);
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create_cq_exit2:
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write_lock_irqsave(&ehca_cq_idr_lock, flags);
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idr_remove(&ehca_cq_idr, my_cq->token);
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write_unlock_irqrestore(&ehca_cq_idr_lock, flags);
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create_cq_exit1:
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kmem_cache_free(cq_cache, my_cq);
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atomic_dec(&shca->num_cqs);
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return cq;
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}
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int ehca_destroy_cq(struct ib_cq *cq)
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{
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u64 h_ret;
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struct ehca_cq *my_cq = container_of(cq, struct ehca_cq, ib_cq);
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int cq_num = my_cq->cq_number;
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struct ib_device *device = cq->device;
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struct ehca_shca *shca = container_of(device, struct ehca_shca,
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ib_device);
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struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
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unsigned long flags;
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if (cq->uobject) {
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if (my_cq->mm_count_galpa || my_cq->mm_count_queue) {
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ehca_err(device, "Resources still referenced in "
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"user space cq_num=%x", my_cq->cq_number);
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return -EINVAL;
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}
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}
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/*
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* remove the CQ from the idr first to make sure
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* no more interrupt tasklets will touch this CQ
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*/
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write_lock_irqsave(&ehca_cq_idr_lock, flags);
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idr_remove(&ehca_cq_idr, my_cq->token);
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write_unlock_irqrestore(&ehca_cq_idr_lock, flags);
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/* now wait until all pending events have completed */
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wait_event(my_cq->wait_completion, !atomic_read(&my_cq->nr_events));
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/* nobody's using our CQ any longer -- we can destroy it */
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h_ret = hipz_h_destroy_cq(adapter_handle, my_cq, 0);
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if (h_ret == H_R_STATE) {
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/* cq in err: read err data and destroy it forcibly */
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ehca_dbg(device, "ehca_cq=%p cq_num=%x resource=%llx in err "
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"state. Try to delete it forcibly.",
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my_cq, cq_num, my_cq->ipz_cq_handle.handle);
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ehca_error_data(shca, my_cq, my_cq->ipz_cq_handle.handle);
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h_ret = hipz_h_destroy_cq(adapter_handle, my_cq, 1);
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if (h_ret == H_SUCCESS)
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ehca_dbg(device, "cq_num=%x deleted successfully.",
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cq_num);
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}
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if (h_ret != H_SUCCESS) {
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ehca_err(device, "hipz_h_destroy_cq() failed h_ret=%lli "
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"ehca_cq=%p cq_num=%x", h_ret, my_cq, cq_num);
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return ehca2ib_return_code(h_ret);
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}
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ipz_queue_dtor(NULL, &my_cq->ipz_queue);
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kmem_cache_free(cq_cache, my_cq);
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atomic_dec(&shca->num_cqs);
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return 0;
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}
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int ehca_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata)
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{
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/* TODO: proper resize needs to be done */
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ehca_err(cq->device, "not implemented yet");
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return -EFAULT;
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}
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int ehca_init_cq_cache(void)
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{
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cq_cache = kmem_cache_create("ehca_cache_cq",
|
|
sizeof(struct ehca_cq), 0,
|
|
SLAB_HWCACHE_ALIGN,
|
|
NULL);
|
|
if (!cq_cache)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
void ehca_cleanup_cq_cache(void)
|
|
{
|
|
if (cq_cache)
|
|
kmem_cache_destroy(cq_cache);
|
|
}
|