diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/infiniband/hw/ehca/ehca_eq.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
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 <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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 <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/infiniband/hw/ehca/ehca_eq.c')
-rw-r--r-- | kernel/drivers/infiniband/hw/ehca/ehca_eq.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/kernel/drivers/infiniband/hw/ehca/ehca_eq.c b/kernel/drivers/infiniband/hw/ehca/ehca_eq.c new file mode 100644 index 000000000..90da6747d --- /dev/null +++ b/kernel/drivers/infiniband/hw/ehca/ehca_eq.c @@ -0,0 +1,189 @@ +/* + * IBM eServer eHCA Infiniband device driver for Linux on POWER + * + * Event queue handling + * + * Authors: Waleri Fomin <fomin@de.ibm.com> + * Khadija Souissi <souissi@de.ibm.com> + * Reinhard Ernst <rernst@de.ibm.com> + * Heiko J Schick <schickhj@de.ibm.com> + * Hoang-Nam Nguyen <hnguyen@de.ibm.com> + * + * + * Copyright (c) 2005 IBM Corporation + * + * All rights reserved. + * + * This source code is distributed under a dual license of GPL v2.0 and OpenIB + * BSD. + * + * OpenIB BSD License + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER + * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include "ehca_classes.h" +#include "ehca_irq.h" +#include "ehca_iverbs.h" +#include "ehca_qes.h" +#include "hcp_if.h" +#include "ipz_pt_fn.h" + +int ehca_create_eq(struct ehca_shca *shca, + struct ehca_eq *eq, + const enum ehca_eq_type type, const u32 length) +{ + int ret; + u64 h_ret; + u32 nr_pages; + u32 i; + void *vpage; + struct ib_device *ib_dev = &shca->ib_device; + + spin_lock_init(&eq->spinlock); + spin_lock_init(&eq->irq_spinlock); + eq->is_initialized = 0; + + if (type != EHCA_EQ && type != EHCA_NEQ) { + ehca_err(ib_dev, "Invalid EQ type %x. eq=%p", type, eq); + return -EINVAL; + } + if (!length) { + ehca_err(ib_dev, "EQ length must not be zero. eq=%p", eq); + return -EINVAL; + } + + h_ret = hipz_h_alloc_resource_eq(shca->ipz_hca_handle, + &eq->pf, + type, + length, + &eq->ipz_eq_handle, + &eq->length, + &nr_pages, &eq->ist); + + if (h_ret != H_SUCCESS) { + ehca_err(ib_dev, "Can't allocate EQ/NEQ. eq=%p", eq); + return -EINVAL; + } + + ret = ipz_queue_ctor(NULL, &eq->ipz_queue, nr_pages, + EHCA_PAGESIZE, sizeof(struct ehca_eqe), 0, 0); + if (!ret) { + ehca_err(ib_dev, "Can't allocate EQ pages eq=%p", eq); + goto create_eq_exit1; + } + + for (i = 0; i < nr_pages; i++) { + u64 rpage; + + vpage = ipz_qpageit_get_inc(&eq->ipz_queue); + if (!vpage) + goto create_eq_exit2; + + rpage = __pa(vpage); + h_ret = hipz_h_register_rpage_eq(shca->ipz_hca_handle, + eq->ipz_eq_handle, + &eq->pf, + 0, 0, rpage, 1); + + if (i == (nr_pages - 1)) { + /* last page */ + vpage = ipz_qpageit_get_inc(&eq->ipz_queue); + if (h_ret != H_SUCCESS || vpage) + goto create_eq_exit2; + } else { + if (h_ret != H_PAGE_REGISTERED) + goto create_eq_exit2; + } + } + + ipz_qeit_reset(&eq->ipz_queue); + + /* register interrupt handlers and initialize work queues */ + if (type == EHCA_EQ) { + tasklet_init(&eq->interrupt_task, ehca_tasklet_eq, (long)shca); + + ret = ibmebus_request_irq(eq->ist, ehca_interrupt_eq, + 0, "ehca_eq", + (void *)shca); + if (ret < 0) + ehca_err(ib_dev, "Can't map interrupt handler."); + } else if (type == EHCA_NEQ) { + tasklet_init(&eq->interrupt_task, ehca_tasklet_neq, (long)shca); + + ret = ibmebus_request_irq(eq->ist, ehca_interrupt_neq, + 0, "ehca_neq", + (void *)shca); + if (ret < 0) + ehca_err(ib_dev, "Can't map interrupt handler."); + } + + eq->is_initialized = 1; + + return 0; + +create_eq_exit2: + ipz_queue_dtor(NULL, &eq->ipz_queue); + +create_eq_exit1: + hipz_h_destroy_eq(shca->ipz_hca_handle, eq); + + return -EINVAL; +} + +void *ehca_poll_eq(struct ehca_shca *shca, struct ehca_eq *eq) +{ + unsigned long flags; + void *eqe; + + spin_lock_irqsave(&eq->spinlock, flags); + eqe = ipz_eqit_eq_get_inc_valid(&eq->ipz_queue); + spin_unlock_irqrestore(&eq->spinlock, flags); + + return eqe; +} + +int ehca_destroy_eq(struct ehca_shca *shca, struct ehca_eq *eq) +{ + unsigned long flags; + u64 h_ret; + + ibmebus_free_irq(eq->ist, (void *)shca); + + spin_lock_irqsave(&shca_list_lock, flags); + eq->is_initialized = 0; + spin_unlock_irqrestore(&shca_list_lock, flags); + + tasklet_kill(&eq->interrupt_task); + + h_ret = hipz_h_destroy_eq(shca->ipz_hca_handle, eq); + + if (h_ret != H_SUCCESS) { + ehca_err(&shca->ib_device, "Can't free EQ resources."); + return -EINVAL; + } + ipz_queue_dtor(NULL, &eq->ipz_queue); + + return 0; +} |