From 45842abbb292338d7d328c40bae411218242d2cd Mon Sep 17 00:00:00 2001 From: Mike Marciniszyn Date: Sun, 14 Feb 2016 12:44:34 -0800 Subject: [PATCH] staging/rdma/hfi1: move txreq header code The patch separates the txreq defines into new files, one for verbs and one for sdma. The verbs_txreq implementation handles the setup and teardown of the txreq cache, so the register routine is changed to call the new init/exit routines. This patch allows for followup patches enhance the send engine. Reviewed-by: Dennis Dalessandro Signed-off-by: Mike Marciniszyn Signed-off-by: Doug Ledford --- drivers/staging/rdma/hfi1/Makefile | 3 +- drivers/staging/rdma/hfi1/qp.c | 2 +- drivers/staging/rdma/hfi1/ruc.c | 2 +- drivers/staging/rdma/hfi1/sdma.h | 80 +---------------- drivers/staging/rdma/hfi1/sdma_txreq.h | 130 ++++++++++++++++++++++++++++ drivers/staging/rdma/hfi1/verbs.c | 111 ++---------------------- drivers/staging/rdma/hfi1/verbs_txreq.c | 149 ++++++++++++++++++++++++++++++++ drivers/staging/rdma/hfi1/verbs_txreq.h | 95 ++++++++++++++++++++ 8 files changed, 384 insertions(+), 188 deletions(-) create mode 100644 drivers/staging/rdma/hfi1/sdma_txreq.h create mode 100644 drivers/staging/rdma/hfi1/verbs_txreq.c create mode 100644 drivers/staging/rdma/hfi1/verbs_txreq.h diff --git a/drivers/staging/rdma/hfi1/Makefile b/drivers/staging/rdma/hfi1/Makefile index 6681b74..9b11706 100644 --- a/drivers/staging/rdma/hfi1/Makefile +++ b/drivers/staging/rdma/hfi1/Makefile @@ -11,7 +11,8 @@ hfi1-y := affinity.o chip.o device.o diag.o driver.o efivar.o \ eprom.o file_ops.o firmware.o \ init.o intr.o mad.o pcie.o pio.o pio_copy.o platform.o \ qp.o qsfp.o rc.o ruc.o sdma.o sysfs.o trace.o twsi.o \ - uc.o ud.o user_exp_rcv.o user_pages.o user_sdma.o verbs.o + uc.o ud.o user_exp_rcv.o user_pages.o user_sdma.o verbs.o \ + verbs_txreq.o hfi1-$(CONFIG_DEBUG_FS) += debugfs.o CFLAGS_trace.o = -I$(src) diff --git a/drivers/staging/rdma/hfi1/qp.c b/drivers/staging/rdma/hfi1/qp.c index 9846cd6..7387ef5 100644 --- a/drivers/staging/rdma/hfi1/qp.c +++ b/drivers/staging/rdma/hfi1/qp.c @@ -60,7 +60,7 @@ #include "hfi.h" #include "qp.h" #include "trace.h" -#include "sdma.h" +#include "verbs_txreq.h" unsigned int hfi1_qp_table_size = 256; module_param_named(qp_table_size, hfi1_qp_table_size, uint, S_IRUGO); diff --git a/drivers/staging/rdma/hfi1/ruc.c b/drivers/staging/rdma/hfi1/ruc.c index 6114550..7c6feff 100644 --- a/drivers/staging/rdma/hfi1/ruc.c +++ b/drivers/staging/rdma/hfi1/ruc.c @@ -53,7 +53,7 @@ #include "hfi.h" #include "mad.h" #include "qp.h" -#include "sdma.h" +#include "verbs_txreq.h" /* * Convert the AETH RNR timeout code into the number of microseconds. diff --git a/drivers/staging/rdma/hfi1/sdma.h b/drivers/staging/rdma/hfi1/sdma.h index 1d52d6e..76ed215 100644 --- a/drivers/staging/rdma/hfi1/sdma.h +++ b/drivers/staging/rdma/hfi1/sdma.h @@ -58,9 +58,8 @@ #include "hfi.h" #include "verbs.h" +#include "sdma_txreq.h" -/* increased for AHG */ -#define NUM_DESC 6 /* Hardware limit */ #define MAX_DESC 64 /* Hardware limit for SDMA packet size */ @@ -311,83 +310,6 @@ struct hw_sdma_desc { __le64 qw[2]; }; -/* - * struct sdma_desc - canonical fragment descriptor - * - * This is the descriptor carried in the tx request - * corresponding to each fragment. - * - */ -struct sdma_desc { - /* private: don't use directly */ - u64 qw[2]; -}; - -struct sdma_txreq; -typedef void (*callback_t)(struct sdma_txreq *, int, int); - -/** - * struct sdma_txreq - the sdma_txreq structure (one per packet) - * @list: for use by user and by queuing for wait - * - * This is the representation of a packet which consists of some - * number of fragments. Storage is provided to within the structure. - * for all fragments. - * - * The storage for the descriptors are automatically extended as needed - * when the currently allocation is exceeded. - * - * The user (Verbs or PSM) may overload this structure with fields - * specific to their use by putting this struct first in their struct. - * The method of allocation of the overloaded structure is user dependent - * - * The list is the only public field in the structure. - * - */ - -struct sdma_txreq { - struct list_head list; - /* private: */ - struct sdma_desc *descp; - /* private: */ - void *coalesce_buf; - /* private: */ - u16 coalesce_idx; - /* private: */ - struct iowait *wait; - /* private: */ - callback_t complete; -#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER - u64 sn; -#endif - /* private: - used in coalesce/pad processing */ - u16 packet_len; - /* private: - down-counted to trigger last */ - u16 tlen; - /* private: flags */ - u16 flags; - /* private: */ - u16 num_desc; - /* private: */ - u16 desc_limit; - /* private: */ - u16 next_descq_idx; - /* private: */ - struct sdma_desc descs[NUM_DESC]; -}; - -struct verbs_txreq { - struct hfi1_pio_header phdr; - struct sdma_txreq txreq; - struct rvt_qp *qp; - struct rvt_swqe *wqe; - struct rvt_mregion *mr; - struct rvt_sge_state *ss; - struct sdma_engine *sde; - u16 hdr_dwords; - u16 hdr_inx; -}; - /** * struct sdma_engine - Data pertaining to each SDMA engine. * @dd: a back-pointer to the device data diff --git a/drivers/staging/rdma/hfi1/sdma_txreq.h b/drivers/staging/rdma/hfi1/sdma_txreq.h new file mode 100644 index 0000000..d0f77a8 --- /dev/null +++ b/drivers/staging/rdma/hfi1/sdma_txreq.h @@ -0,0 +1,130 @@ +/* + * Copyright(c) 2016 Intel Corporation. + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * 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. + * - Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * 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. + * + */ + +#ifndef HFI1_SDMA_TXREQ_H +#define HFI1_SDMA_TXREQ_H + +/* increased for AHG */ +#define NUM_DESC 6 + +/* + * struct sdma_desc - canonical fragment descriptor + * + * This is the descriptor carried in the tx request + * corresponding to each fragment. + * + */ +struct sdma_desc { + /* private: don't use directly */ + u64 qw[2]; +}; + +/** + * struct sdma_txreq - the sdma_txreq structure (one per packet) + * @list: for use by user and by queuing for wait + * + * This is the representation of a packet which consists of some + * number of fragments. Storage is provided to within the structure. + * for all fragments. + * + * The storage for the descriptors are automatically extended as needed + * when the currently allocation is exceeded. + * + * The user (Verbs or PSM) may overload this structure with fields + * specific to their use by putting this struct first in their struct. + * The method of allocation of the overloaded structure is user dependent + * + * The list is the only public field in the structure. + * + */ + +#define SDMA_TXREQ_S_OK 0 +#define SDMA_TXREQ_S_SENDERROR 1 +#define SDMA_TXREQ_S_ABORTED 2 +#define SDMA_TXREQ_S_SHUTDOWN 3 + +/* flags bits */ +#define SDMA_TXREQ_F_URGENT 0x0001 +#define SDMA_TXREQ_F_AHG_COPY 0x0002 +#define SDMA_TXREQ_F_USE_AHG 0x0004 + +struct sdma_txreq; +typedef void (*callback_t)(struct sdma_txreq *, int, int); + +struct iowait; +struct sdma_txreq { + struct list_head list; + /* private: */ + struct sdma_desc *descp; + /* private: */ + void *coalesce_buf; + /* private: */ + struct iowait *wait; + /* private: */ + callback_t complete; +#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER + u64 sn; +#endif + /* private: - used in coalesce/pad processing */ + u16 packet_len; + /* private: - down-counted to trigger last */ + u16 tlen; + /* private: */ + u16 num_desc; + /* private: */ + u16 desc_limit; + /* private: */ + u16 next_descq_idx; + /* private: */ + u16 coalesce_idx; + /* private: flags */ + u16 flags; + /* private: */ + struct sdma_desc descs[NUM_DESC]; +}; + +#endif /* HFI1_SDMA_TXREQ_H */ diff --git a/drivers/staging/rdma/hfi1/verbs.c b/drivers/staging/rdma/hfi1/verbs.c index 1df4648..7838b21 100644 --- a/drivers/staging/rdma/hfi1/verbs.c +++ b/drivers/staging/rdma/hfi1/verbs.c @@ -63,7 +63,7 @@ #include "device.h" #include "trace.h" #include "qp.h" -#include "sdma.h" +#include "verbs_txreq.h" static unsigned int hfi1_lkey_table_size = 16; module_param_named(lkey_table_size, hfi1_lkey_table_size, uint, @@ -508,89 +508,6 @@ void update_sge(struct rvt_sge_state *ss, u32 length) } } -static noinline struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev, - struct rvt_qp *qp) -{ - struct hfi1_qp_priv *priv = qp->priv; - struct verbs_txreq *tx; - unsigned long flags; - - tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC); - if (!tx) { - spin_lock_irqsave(&qp->s_lock, flags); - write_seqlock(&dev->iowait_lock); - if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK && - list_empty(&priv->s_iowait.list)) { - dev->n_txwait++; - qp->s_flags |= RVT_S_WAIT_TX; - list_add_tail(&priv->s_iowait.list, &dev->txwait); - trace_hfi1_qpsleep(qp, RVT_S_WAIT_TX); - atomic_inc(&qp->refcount); - } - qp->s_flags &= ~RVT_S_BUSY; - write_sequnlock(&dev->iowait_lock); - spin_unlock_irqrestore(&qp->s_lock, flags); - tx = ERR_PTR(-EBUSY); - } - return tx; -} - -static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev, - struct rvt_qp *qp) -{ - struct verbs_txreq *tx; - - tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC); - if (!tx) { - /* call slow path to get the lock */ - tx = __get_txreq(dev, qp); - if (IS_ERR(tx)) - return tx; - } - tx->qp = qp; - return tx; -} - -void hfi1_put_txreq(struct verbs_txreq *tx) -{ - struct hfi1_ibdev *dev; - struct rvt_qp *qp; - unsigned long flags; - unsigned int seq; - struct hfi1_qp_priv *priv; - - qp = tx->qp; - dev = to_idev(qp->ibqp.device); - - if (tx->mr) { - rvt_put_mr(tx->mr); - tx->mr = NULL; - } - sdma_txclean(dd_from_dev(dev), &tx->txreq); - - /* Free verbs_txreq and return to slab cache */ - kmem_cache_free(dev->verbs_txreq_cache, tx); - - do { - seq = read_seqbegin(&dev->iowait_lock); - if (!list_empty(&dev->txwait)) { - struct iowait *wait; - - write_seqlock_irqsave(&dev->iowait_lock, flags); - /* Wake up first QP wanting a free struct */ - wait = list_first_entry(&dev->txwait, struct iowait, - list); - qp = iowait_to_qp(wait); - priv = qp->priv; - list_del_init(&priv->s_iowait.list); - /* refcount held until actual wake up */ - write_sequnlock_irqrestore(&dev->iowait_lock, flags); - hfi1_qp_wakeup(qp, RVT_S_WAIT_TX); - break; - } - } while (read_seqretry(&dev->iowait_lock, seq)); -} - /* * This is called with progress side lock held. */ @@ -1427,13 +1344,6 @@ static void init_ibport(struct hfi1_pportdata *ppd) RCU_INIT_POINTER(ibp->rvp.qp[1], NULL); } -static void verbs_txreq_kmem_cache_ctor(void *obj) -{ - struct verbs_txreq *tx = obj; - - memset(tx, 0, sizeof(*tx)); -} - /** * hfi1_register_ib_device - register our device with the infiniband core * @dd: the device data structure @@ -1447,8 +1357,6 @@ int hfi1_register_ib_device(struct hfi1_devdata *dd) unsigned i; int ret; size_t lcpysz = IB_DEVICE_NAME_MAX; - u16 descq_cnt; - char buf[TXREQ_NAME_LEN]; for (i = 0; i < dd->num_pports; i++) init_ibport(ppd + i); @@ -1461,18 +1369,9 @@ int hfi1_register_ib_device(struct hfi1_devdata *dd) INIT_LIST_HEAD(&dev->txwait); INIT_LIST_HEAD(&dev->memwait); - descq_cnt = sdma_get_descq_cnt(); - - snprintf(buf, sizeof(buf), "hfi1_%u_vtxreq_cache", dd->unit); - /* SLAB_HWCACHE_ALIGN for AHG */ - dev->verbs_txreq_cache = kmem_cache_create(buf, - sizeof(struct verbs_txreq), - 0, SLAB_HWCACHE_ALIGN, - verbs_txreq_kmem_cache_ctor); - if (!dev->verbs_txreq_cache) { - ret = -ENOMEM; + ret = verbs_txreq_init(dev); + if (ret) goto err_verbs_txreq; - } /* * The system image GUID is supposed to be the same for all @@ -1578,7 +1477,7 @@ int hfi1_register_ib_device(struct hfi1_devdata *dd) err_class: rvt_unregister_device(&dd->verbs_dev.rdi); err_verbs_txreq: - kmem_cache_destroy(dev->verbs_txreq_cache); + verbs_txreq_exit(dev); dd_dev_err(dd, "cannot register verbs: %d!\n", -ret); return ret; } @@ -1597,7 +1496,7 @@ void hfi1_unregister_ib_device(struct hfi1_devdata *dd) dd_dev_err(dd, "memwait list not empty!\n"); del_timer_sync(&dev->mem_timer); - kmem_cache_destroy(dev->verbs_txreq_cache); + verbs_txreq_exit(dev); } void hfi1_cnp_rcv(struct hfi1_packet *packet) diff --git a/drivers/staging/rdma/hfi1/verbs_txreq.c b/drivers/staging/rdma/hfi1/verbs_txreq.c new file mode 100644 index 0000000..bc95c41 --- /dev/null +++ b/drivers/staging/rdma/hfi1/verbs_txreq.c @@ -0,0 +1,149 @@ +/* + * Copyright(c) 2016 Intel Corporation. + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * 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. + * - Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * 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 "hfi.h" +#include "verbs_txreq.h" +#include "qp.h" +#include "trace.h" + +#define TXREQ_LEN 24 + +void hfi1_put_txreq(struct verbs_txreq *tx) +{ + struct hfi1_ibdev *dev; + struct rvt_qp *qp; + unsigned long flags; + unsigned int seq; + struct hfi1_qp_priv *priv; + + qp = tx->qp; + dev = to_idev(qp->ibqp.device); + + if (tx->mr) + rvt_put_mr(tx->mr); + + sdma_txclean(dd_from_dev(dev), &tx->txreq); + + /* Free verbs_txreq and return to slab cache */ + kmem_cache_free(dev->verbs_txreq_cache, tx); + + do { + seq = read_seqbegin(&dev->iowait_lock); + if (!list_empty(&dev->txwait)) { + struct iowait *wait; + + write_seqlock_irqsave(&dev->iowait_lock, flags); + wait = list_first_entry(&dev->txwait, struct iowait, + list); + qp = iowait_to_qp(wait); + priv = qp->priv; + list_del_init(&priv->s_iowait.list); + /* refcount held until actual wake up */ + write_sequnlock_irqrestore(&dev->iowait_lock, flags); + hfi1_qp_wakeup(qp, RVT_S_WAIT_TX); + break; + } + } while (read_seqretry(&dev->iowait_lock, seq)); +} + +struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev, + struct rvt_qp *qp) +{ + struct verbs_txreq *tx = ERR_PTR(-EBUSY); + unsigned long flags; + + spin_lock_irqsave(&qp->s_lock, flags); + write_seqlock(&dev->iowait_lock); + if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) { + struct hfi1_qp_priv *priv; + + tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC); + if (tx) + goto out; + priv = qp->priv; + if (list_empty(&priv->s_iowait.list)) { + dev->n_txwait++; + qp->s_flags |= RVT_S_WAIT_TX; + list_add_tail(&priv->s_iowait.list, &dev->txwait); + trace_hfi1_qpsleep(qp, RVT_S_WAIT_TX); + atomic_inc(&qp->refcount); + } + qp->s_flags &= ~RVT_S_BUSY; + } +out: + write_sequnlock(&dev->iowait_lock); + spin_unlock_irqrestore(&qp->s_lock, flags); + return tx; +} + +static void verbs_txreq_kmem_cache_ctor(void *obj) +{ + struct verbs_txreq *tx = (struct verbs_txreq *)obj; + + memset(tx, 0, sizeof(*tx)); +} + +int verbs_txreq_init(struct hfi1_ibdev *dev) +{ + char buf[TXREQ_LEN]; + struct hfi1_devdata *dd = dd_from_dev(dev); + + snprintf(buf, sizeof(buf), "hfi1_%u_vtxreq_cache", dd->unit); + dev->verbs_txreq_cache = kmem_cache_create(buf, + sizeof(struct verbs_txreq), + 0, SLAB_HWCACHE_ALIGN, + verbs_txreq_kmem_cache_ctor); + if (!dev->verbs_txreq_cache) + return -ENOMEM; + return 0; +} + +void verbs_txreq_exit(struct hfi1_ibdev *dev) +{ + kmem_cache_destroy(dev->verbs_txreq_cache); + dev->verbs_txreq_cache = NULL; +} diff --git a/drivers/staging/rdma/hfi1/verbs_txreq.h b/drivers/staging/rdma/hfi1/verbs_txreq.h new file mode 100644 index 0000000..387882a --- /dev/null +++ b/drivers/staging/rdma/hfi1/verbs_txreq.h @@ -0,0 +1,95 @@ +/* + * Copyright(c) 2016 Intel Corporation. + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * 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. + * - Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * 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. + * + */ + +#ifndef HFI1_VERBS_TXREQ_H +#define HFI1_VERBS_TXREQ_H + +#include +#include + +#include "verbs.h" +#include "sdma_txreq.h" +#include "iowait.h" + +struct verbs_txreq { + struct hfi1_pio_header phdr; + struct sdma_txreq txreq; + struct rvt_qp *qp; + struct rvt_swqe *wqe; + struct rvt_mregion *mr; + struct rvt_sge_state *ss; + struct sdma_engine *sde; + struct send_context *psc; + u16 hdr_dwords; +}; + +struct hfi1_ibdev; +struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev, + struct rvt_qp *qp); + +static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev, + struct rvt_qp *qp) +{ + struct verbs_txreq *tx; + + tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC); + if (unlikely(!tx)) { + /* call slow path to get the lock */ + tx = __get_txreq(dev, qp); + if (IS_ERR(tx)) + return tx; + } + tx->qp = qp; + tx->mr = NULL; + return tx; +} + +void hfi1_put_txreq(struct verbs_txreq *tx); +int verbs_txreq_init(struct hfi1_ibdev *dev); +void verbs_txreq_exit(struct hfi1_ibdev *dev); + +#endif /* HFI1_VERBS_TXREQ_H */ -- 2.7.4