diff options
Diffstat (limited to 'drivers/staging/rdma/hfi1/qp.c')
| -rw-r--r-- | drivers/staging/rdma/hfi1/qp.c | 1642 |
1 files changed, 445 insertions, 1197 deletions
diff --git a/drivers/staging/rdma/hfi1/qp.c b/drivers/staging/rdma/hfi1/qp.c index ce036810d576..29a5ad28019b 100644 --- a/drivers/staging/rdma/hfi1/qp.c +++ b/drivers/staging/rdma/hfi1/qp.c @@ -1,12 +1,11 @@ /* + * Copyright(c) 2015, 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 * - * Copyright(c) 2015 Intel Corporation. - * * 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. @@ -18,8 +17,6 @@ * * BSD LICENSE * - * Copyright(c) 2015 Intel Corporation. - * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: @@ -54,31 +51,32 @@ #include <linux/module.h> #include <linux/random.h> #include <linux/seq_file.h> +#include <rdma/rdma_vt.h> +#include <rdma/rdmavt_qp.h> #include "hfi.h" #include "qp.h" #include "trace.h" -#include "sdma.h" +#include "verbs_txreq.h" -#define BITS_PER_PAGE (PAGE_SIZE*BITS_PER_BYTE) -#define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1) - -static unsigned int hfi1_qp_table_size = 256; +unsigned int hfi1_qp_table_size = 256; module_param_named(qp_table_size, hfi1_qp_table_size, uint, S_IRUGO); MODULE_PARM_DESC(qp_table_size, "QP table size"); -static void flush_tx_list(struct hfi1_qp *qp); +static void flush_tx_list(struct rvt_qp *qp); static int iowait_sleep( struct sdma_engine *sde, struct iowait *wait, struct sdma_txreq *stx, unsigned seq); static void iowait_wakeup(struct iowait *wait, int reason); +static void iowait_sdma_drained(struct iowait *wait); +static void qp_pio_drain(struct rvt_qp *qp); -static inline unsigned mk_qpn(struct hfi1_qpn_table *qpt, - struct qpn_map *map, unsigned off) +static inline unsigned mk_qpn(struct rvt_qpn_table *qpt, + struct rvt_qpn_map *map, unsigned off) { - return (map - qpt->map) * BITS_PER_PAGE + off; + return (map - qpt->map) * RVT_BITS_PER_PAGE + off; } /* @@ -118,437 +116,15 @@ static const u16 credit_table[31] = { 32768 /* 1E */ }; -static void get_map_page(struct hfi1_qpn_table *qpt, struct qpn_map *map) -{ - unsigned long page = get_zeroed_page(GFP_KERNEL); - - /* - * Free the page if someone raced with us installing it. - */ - - spin_lock(&qpt->lock); - if (map->page) - free_page(page); - else - map->page = (void *)page; - spin_unlock(&qpt->lock); -} - -/* - * Allocate the next available QPN or - * zero/one for QP type IB_QPT_SMI/IB_QPT_GSI. - */ -static int alloc_qpn(struct hfi1_devdata *dd, struct hfi1_qpn_table *qpt, - enum ib_qp_type type, u8 port) -{ - u32 i, offset, max_scan, qpn; - struct qpn_map *map; - u32 ret; - - if (type == IB_QPT_SMI || type == IB_QPT_GSI) { - unsigned n; - - ret = type == IB_QPT_GSI; - n = 1 << (ret + 2 * (port - 1)); - spin_lock(&qpt->lock); - if (qpt->flags & n) - ret = -EINVAL; - else - qpt->flags |= n; - spin_unlock(&qpt->lock); - goto bail; - } - - qpn = qpt->last + qpt->incr; - if (qpn >= QPN_MAX) - qpn = qpt->incr | ((qpt->last & 1) ^ 1); - /* offset carries bit 0 */ - offset = qpn & BITS_PER_PAGE_MASK; - map = &qpt->map[qpn / BITS_PER_PAGE]; - max_scan = qpt->nmaps - !offset; - for (i = 0;;) { - if (unlikely(!map->page)) { - get_map_page(qpt, map); - if (unlikely(!map->page)) - break; - } - do { - if (!test_and_set_bit(offset, map->page)) { - qpt->last = qpn; - ret = qpn; - goto bail; - } - offset += qpt->incr; - /* - * This qpn might be bogus if offset >= BITS_PER_PAGE. - * That is OK. It gets re-assigned below - */ - qpn = mk_qpn(qpt, map, offset); - } while (offset < BITS_PER_PAGE && qpn < QPN_MAX); - /* - * In order to keep the number of pages allocated to a - * minimum, we scan the all existing pages before increasing - * the size of the bitmap table. - */ - if (++i > max_scan) { - if (qpt->nmaps == QPNMAP_ENTRIES) - break; - map = &qpt->map[qpt->nmaps++]; - /* start at incr with current bit 0 */ - offset = qpt->incr | (offset & 1); - } else if (map < &qpt->map[qpt->nmaps]) { - ++map; - /* start at incr with current bit 0 */ - offset = qpt->incr | (offset & 1); - } else { - map = &qpt->map[0]; - /* wrap to first map page, invert bit 0 */ - offset = qpt->incr | ((offset & 1) ^ 1); - } - /* there can be no bits at shift and below */ - WARN_ON(offset & (dd->qos_shift - 1)); - qpn = mk_qpn(qpt, map, offset); - } - - ret = -ENOMEM; - -bail: - return ret; -} - -static void free_qpn(struct hfi1_qpn_table *qpt, u32 qpn) -{ - struct qpn_map *map; - - map = qpt->map + qpn / BITS_PER_PAGE; - if (map->page) - clear_bit(qpn & BITS_PER_PAGE_MASK, map->page); -} - -/* - * Put the QP into the hash table. - * The hash table holds a reference to the QP. - */ -static void insert_qp(struct hfi1_ibdev *dev, struct hfi1_qp *qp) -{ - struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); - unsigned long flags; - - atomic_inc(&qp->refcount); - spin_lock_irqsave(&dev->qp_dev->qpt_lock, flags); - - if (qp->ibqp.qp_num <= 1) { - rcu_assign_pointer(ibp->qp[qp->ibqp.qp_num], qp); - } else { - u32 n = qpn_hash(dev->qp_dev, qp->ibqp.qp_num); - - qp->next = dev->qp_dev->qp_table[n]; - rcu_assign_pointer(dev->qp_dev->qp_table[n], qp); - trace_hfi1_qpinsert(qp, n); - } - - spin_unlock_irqrestore(&dev->qp_dev->qpt_lock, flags); -} - -/* - * Remove the QP from the table so it can't be found asynchronously by - * the receive interrupt routine. - */ -static void remove_qp(struct hfi1_ibdev *dev, struct hfi1_qp *qp) -{ - struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); - u32 n = qpn_hash(dev->qp_dev, qp->ibqp.qp_num); - unsigned long flags; - int removed = 1; - - spin_lock_irqsave(&dev->qp_dev->qpt_lock, flags); - - if (rcu_dereference_protected(ibp->qp[0], - lockdep_is_held(&dev->qp_dev->qpt_lock)) == qp) { - RCU_INIT_POINTER(ibp->qp[0], NULL); - } else if (rcu_dereference_protected(ibp->qp[1], - lockdep_is_held(&dev->qp_dev->qpt_lock)) == qp) { - RCU_INIT_POINTER(ibp->qp[1], NULL); - } else { - struct hfi1_qp *q; - struct hfi1_qp __rcu **qpp; - - removed = 0; - qpp = &dev->qp_dev->qp_table[n]; - for (; (q = rcu_dereference_protected(*qpp, - lockdep_is_held(&dev->qp_dev->qpt_lock))) - != NULL; - qpp = &q->next) - if (q == qp) { - RCU_INIT_POINTER(*qpp, - rcu_dereference_protected(qp->next, - lockdep_is_held(&dev->qp_dev->qpt_lock))); - removed = 1; - trace_hfi1_qpremove(qp, n); - break; - } - } - - spin_unlock_irqrestore(&dev->qp_dev->qpt_lock, flags); - if (removed) { - synchronize_rcu(); - if (atomic_dec_and_test(&qp->refcount)) - wake_up(&qp->wait); - } -} - -/** - * free_all_qps - check for QPs still in use - * @qpt: the QP table to empty - * - * There should not be any QPs still in use. - * Free memory for table. - */ -static unsigned free_all_qps(struct hfi1_devdata *dd) -{ - struct hfi1_ibdev *dev = &dd->verbs_dev; - unsigned long flags; - struct hfi1_qp *qp; - unsigned n, qp_inuse = 0; - - for (n = 0; n < dd->num_pports; n++) { - struct hfi1_ibport *ibp = &dd->pport[n].ibport_data; - - if (!hfi1_mcast_tree_empty(ibp)) - qp_inuse++; - rcu_read_lock(); - if (rcu_dereference(ibp->qp[0])) - qp_inuse++; - if (rcu_dereference(ibp->qp[1])) - qp_inuse++; - rcu_read_unlock(); - } - - if (!dev->qp_dev) - goto bail; - spin_lock_irqsave(&dev->qp_dev->qpt_lock, flags); - for (n = 0; n < dev->qp_dev->qp_table_size; n++) { - qp = rcu_dereference_protected(dev->qp_dev->qp_table[n], - lockdep_is_held(&dev->qp_dev->qpt_lock)); - RCU_INIT_POINTER(dev->qp_dev->qp_table[n], NULL); - - for (; qp; qp = rcu_dereference_protected(qp->next, - lockdep_is_held(&dev->qp_dev->qpt_lock))) - qp_inuse++; - } - spin_unlock_irqrestore(&dev->qp_dev->qpt_lock, flags); - synchronize_rcu(); -bail: - return qp_inuse; -} - -/** - * reset_qp - initialize the QP state to the reset state - * @qp: the QP to reset - * @type: the QP type - */ -static void reset_qp(struct hfi1_qp *qp, enum ib_qp_type type) -{ - qp->remote_qpn = 0; - qp->qkey = 0; - qp->qp_access_flags = 0; - iowait_init( - &qp->s_iowait, - 1, - hfi1_do_send, - iowait_sleep, - iowait_wakeup); - qp->s_flags &= HFI1_S_SIGNAL_REQ_WR; - qp->s_hdrwords = 0; - qp->s_wqe = NULL; - qp->s_draining = 0; - qp->s_next_psn = 0; - qp->s_last_psn = 0; - qp->s_sending_psn = 0; - qp->s_sending_hpsn = 0; - qp->s_psn = 0; - qp->r_psn = 0; - qp->r_msn = 0; - if (type == IB_QPT_RC) { - qp->s_state = IB_OPCODE_RC_SEND_LAST; - qp->r_state = IB_OPCODE_RC_SEND_LAST; - } else { - qp->s_state = IB_OPCODE_UC_SEND_LAST; - qp->r_state = IB_OPCODE_UC_SEND_LAST; - } - qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE; - qp->r_nak_state = 0; - qp->r_adefered = 0; - qp->r_aflags = 0; - qp->r_flags = 0; - qp->s_head = 0; - qp->s_tail = 0; - qp->s_cur = 0; - qp->s_acked = 0; - qp->s_last = 0; - qp->s_ssn = 1; - qp->s_lsn = 0; - clear_ahg(qp); - qp->s_mig_state = IB_MIG_MIGRATED; - memset(qp->s_ack_queue, 0, sizeof(qp->s_ack_queue)); - qp->r_head_ack_queue = 0; - qp->s_tail_ack_queue = 0; - qp->s_num_rd_atomic = 0; - if (qp->r_rq.wq) { - qp->r_rq.wq->head = 0; - qp->r_rq.wq->tail = 0; - } - qp->r_sge.num_sge = 0; -} - -static void clear_mr_refs(struct hfi1_qp *qp, int clr_sends) -{ - unsigned n; - - if (test_and_clear_bit(HFI1_R_REWIND_SGE, &qp->r_aflags)) - hfi1_put_ss(&qp->s_rdma_read_sge); - - hfi1_put_ss(&qp->r_sge); - - if (clr_sends) { - while (qp->s_last != qp->s_head) { - struct hfi1_swqe *wqe = get_swqe_ptr(qp, qp->s_last); - unsigned i; - - for (i = 0; i < wqe->wr.num_sge; i++) { - struct hfi1_sge *sge = &wqe->sg_list[i]; - - hfi1_put_mr(sge->mr); - } - if (qp->ibqp.qp_type == IB_QPT_UD || - qp->ibqp.qp_type == IB_QPT_SMI || - qp->ibqp.qp_type == IB_QPT_GSI) - atomic_dec(&to_iah(wqe->ud_wr.ah)->refcount); - if (++qp->s_last >= qp->s_size) - qp->s_last = 0; - } - if (qp->s_rdma_mr) { - hfi1_put_mr(qp->s_rdma_mr); - qp->s_rdma_mr = NULL; - } - } - - if (qp->ibqp.qp_type != IB_QPT_RC) - return; - - for (n = 0; n < ARRAY_SIZE(qp->s_ack_queue); n++) { - struct hfi1_ack_entry *e = &qp->s_ack_queue[n]; - - if (e->opcode == IB_OPCODE_RC_RDMA_READ_REQUEST && - e->rdma_sge.mr) { - hfi1_put_mr(e->rdma_sge.mr); - e->rdma_sge.mr = NULL; - } - } -} - -/** - * hfi1_error_qp - put a QP into the error state - * @qp: the QP to put into the error state - * @err: the receive completion error to signal if a RWQE is active - * - * Flushes both send and receive work queues. - * Returns true if last WQE event should be generated. - * The QP r_lock and s_lock should be held and interrupts disabled. - * If we are already in error state, just return. - */ -int hfi1_error_qp(struct hfi1_qp *qp, enum ib_wc_status err) +static void flush_tx_list(struct rvt_qp *qp) { - struct hfi1_ibdev *dev = to_idev(qp->ibqp.device); - struct ib_wc wc; - int ret = 0; - - if (qp->state == IB_QPS_ERR || qp->state == IB_QPS_RESET) - goto bail; - - qp->state = IB_QPS_ERR; - - if (qp->s_flags & (HFI1_S_TIMER | HFI1_S_WAIT_RNR)) { - qp->s_flags &= ~(HFI1_S_TIMER | HFI1_S_WAIT_RNR); - del_timer(&qp->s_timer); - } - - if (qp->s_flags & HFI1_S_ANY_WAIT_SEND) - qp->s_flags &= ~HFI1_S_ANY_WAIT_SEND; - - write_seqlock(&dev->iowait_lock); - if (!list_empty(&qp->s_iowait.list) && !(qp->s_flags & HFI1_S_BUSY)) { - qp->s_flags &= ~HFI1_S_ANY_WAIT_IO; - list_del_init(&qp->s_iowait.list); - if (atomic_dec_and_test(&qp->refcount)) - wake_up(&qp->wait); - } - write_sequnlock(&dev->iowait_lock); - - if (!(qp->s_flags & HFI1_S_BUSY)) { - qp->s_hdrwords = 0; - if (qp->s_rdma_mr) { - hfi1_put_mr(qp->s_rdma_mr); - qp->s_rdma_mr = NULL; - } - flush_tx_list(qp); - } - - /* Schedule the sending tasklet to drain the send work queue. */ - if (qp->s_last != qp->s_head) - hfi1_schedule_send(qp); - - clear_mr_refs(qp, 0); - - memset(&wc, 0, sizeof(wc)); - wc.qp = &qp->ibqp; - wc.opcode = IB_WC_RECV; - - if (test_and_clear_bit(HFI1_R_WRID_VALID, &qp->r_aflags)) { - wc.wr_id = qp->r_wr_id; - wc.status = err; - hfi1_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1); - } - wc.status = IB_WC_WR_FLUSH_ERR; + struct hfi1_qp_priv *priv = qp->priv; - if (qp->r_rq.wq) { - struct hfi1_rwq *wq; - u32 head; - u32 tail; - - spin_lock(&qp->r_rq.lock); - - /* sanity check pointers before trusting them */ - wq = qp->r_rq.wq; - head = wq->head; - if (head >= qp->r_rq.size) - head = 0; - tail = wq->tail; - if (tail >= qp->r_rq.size) - tail = 0; - while (tail != head) { - wc.wr_id = get_rwqe_ptr(&qp->r_rq, tail)->wr_id; - if (++tail >= qp->r_rq.size) - tail = 0; - hfi1_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1); - } - wq->tail = tail; - - spin_unlock(&qp->r_rq.lock); - } else if (qp->ibqp.event_handler) - ret = 1; - -bail: - return ret; -} - -static void flush_tx_list(struct hfi1_qp *qp) -{ - while (!list_empty(&qp->s_iowait.tx_head)) { + while (!list_empty(&priv->s_iowait.tx_head)) { struct sdma_txreq *tx; tx = list_first_entry( - &qp->s_iowait.tx_head, + &priv->s_iowait.tx_head, struct sdma_txreq, list); list_del_init(&tx->list); @@ -557,14 +133,15 @@ static void flush_tx_list(struct hfi1_qp *qp) } } -static void flush_iowait(struct hfi1_qp *qp) +static void flush_iowait(struct rvt_qp *qp) { + struct hfi1_qp_priv *priv = qp->priv; struct hfi1_ibdev *dev = to_idev(qp->ibqp.device); unsigned long flags; write_seqlock_irqsave(&dev->iowait_lock, flags); - if (!list_empty(&qp->s_iowait.list)) { - list_del_init(&qp->s_iowait.list); + if (!list_empty(&priv->s_iowait.list)) { + list_del_init(&priv->s_iowait.list); if (atomic_dec_and_test(&qp->refcount)) wake_up(&qp->wait); } @@ -597,362 +174,106 @@ static inline int verbs_mtu_enum_to_int(struct ib_device *dev, enum ib_mtu mtu) return ib_mtu_enum_to_int(mtu); } - -/** - * hfi1_modify_qp - modify the attributes of a queue pair - * @ibqp: the queue pair who's attributes we're modifying - * @attr: the new attributes - * @attr_mask: the mask of attributes to modify - * @udata: user data for libibverbs.so - * - * Returns 0 on success, otherwise returns an errno. - */ -int hfi1_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, - int attr_mask, struct ib_udata *udata) +int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, + int attr_mask, struct ib_udata *udata) { + struct ib_qp *ibqp = &qp->ibqp; struct hfi1_ibdev *dev = to_idev(ibqp->device); - struct hfi1_qp *qp = to_iqp(ibqp); - enum ib_qp_state cur_state, new_state; - struct ib_event ev; - int lastwqe = 0; - int mig = 0; - int ret; - u32 pmtu = 0; /* for gcc warning only */ struct hfi1_devdata *dd = dd_from_dev(dev); - - spin_lock_irq(&qp->r_lock); - spin_lock(&qp->s_lock); - - cur_state = attr_mask & IB_QP_CUR_STATE ? - attr->cur_qp_state : qp->state; - new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; - - if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, - attr_mask, IB_LINK_LAYER_UNSPECIFIED)) - goto inval; + u8 sc; if (attr_mask & IB_QP_AV) { - u8 sc; - - if (attr->ah_attr.dlid >= HFI1_MULTICAST_LID_BASE) - goto inval; - if (hfi1_check_ah(qp->ibqp.device, &attr->ah_attr)) - goto inval; sc = ah_to_sc(ibqp->device, &attr->ah_attr); + if (sc == 0xf) + return -EINVAL; + if (!qp_to_sdma_engine(qp, sc) && dd->flags & HFI1_HAS_SEND_DMA) - goto inval; + return -EINVAL; + + if (!qp_to_send_context(qp, sc)) + return -EINVAL; } if (attr_mask & IB_QP_ALT_PATH) { - u8 sc; - - if (attr->alt_ah_attr.dlid >= HFI1_MULTICAST_LID_BASE) - goto inval; - if (hfi1_check_ah(qp->ibqp.device, &attr->alt_ah_attr)) - goto inval; - if (attr->alt_pkey_index >= hfi1_get_npkeys(dd)) - goto inval; sc = ah_to_sc(ibqp->device, &attr->alt_ah_attr); + if (sc == 0xf) + return -EINVAL; + if (!qp_to_sdma_engine(qp, sc) && dd->flags & HFI1_HAS_SEND_DMA) - goto inval; - } - - if (attr_mask & IB_QP_PKEY_INDEX) - if (attr->pkey_index >= hfi1_get_npkeys(dd)) - goto inval; - - if (attr_mask & IB_QP_MIN_RNR_TIMER) - if (attr->min_rnr_timer > 31) - goto inval; + return -EINVAL; - if (attr_mask & IB_QP_PORT) - if (qp->ibqp.qp_type == IB_QPT_SMI || - qp->ibqp.qp_type == IB_QPT_GSI || - attr->port_num == 0 || - attr->port_num > ibqp->device->phys_port_cnt) - goto inval; - - if (attr_mask & IB_QP_DEST_QPN) - if (attr->dest_qp_num > HFI1_QPN_MASK) - goto inval; + if (!qp_to_send_context(qp, sc)) + return -EINVAL; + } - if (attr_mask & IB_QP_RETRY_CNT) - if (attr->retry_cnt > 7) - goto inval; + return 0; +} - if (attr_mask & IB_QP_RNR_RETRY) - if (attr->rnr_retry > 7) - goto inval; +void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, + int attr_mask, struct ib_udata *udata) +{ + struct ib_qp *ibqp = &qp->ibqp; + struct hfi1_qp_priv *priv = qp->priv; - /* - * Don't allow invalid path_mtu values. OK to set greater - * than the active mtu (or even the max_cap, if we have tuned - * that to a small mtu. We'll set qp->path_mtu - * to the lesser of requested attribute mtu and active, - * for packetizing messages. - * Note that the QP port has to be set in INIT and MTU in RTR. - */ - if (attr_mask & IB_QP_PATH_MTU) { - int mtu, pidx = qp->port_num - 1; - - dd = dd_from_dev(dev); - mtu = verbs_mtu_enum_to_int(ibqp->device, attr->path_mtu); - if (mtu == -1) - goto inval; - - if (mtu > dd->pport[pidx].ibmtu) - pmtu = mtu_to_enum(dd->pport[pidx].ibmtu, IB_MTU_2048); - else - pmtu = attr->path_mtu; + if (attr_mask & IB_QP_AV) { + priv->s_sc = ah_to_sc(ibqp->device, &qp->remote_ah_attr); + priv->s_sde = qp_to_sdma_engine(qp, priv->s_sc); + priv->s_sendcontext = qp_to_send_context(qp, priv->s_sc); } - if (attr_mask & IB_QP_PATH_MIG_STATE) { - if (attr->path_mig_state == IB_MIG_REARM) { - if (qp->s_mig_state == IB_MIG_ARMED) - goto inval; - if (new_state != IB_QPS_RTS) - goto inval; - } else if (attr->path_mig_state == IB_MIG_MIGRATED) { - if (qp->s_mig_state == IB_MIG_REARM) - goto inval; - if (new_state != IB_QPS_RTS && new_state != IB_QPS_SQD) - goto inval; - if (qp->s_mig_state == IB_MIG_ARMED) - mig = 1; - } else - goto inval; + if (attr_mask & IB_QP_PATH_MIG_STATE && + attr->path_mig_state == IB_MIG_MIGRATED && + qp->s_mig_state == IB_MIG_ARMED) { + qp->s_flags |= RVT_S_AHG_CLEAR; + priv->s_sc = ah_to_sc(ibqp->device, &qp->remote_ah_attr); + priv->s_sde = qp_to_sdma_engine(qp, priv->s_sc); + priv->s_sendcontext = qp_to_send_context(qp, priv->s_sc); } +} - if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) - if (attr->max_dest_rd_atomic > HFI1_MAX_RDMA_ATOMIC) - goto inval; - - switch (new_state) { - case IB_QPS_RESET: - if (qp->state != IB_QPS_RESET) { - qp->state = IB_QPS_RESET; - flush_iowait(qp); - qp->s_flags &= ~(HFI1_S_TIMER | HFI1_S_ANY_WAIT); - spin_unlock(&qp->s_lock); - spin_unlock_irq(&qp->r_lock); - /* Stop the sending work queue and retry timer */ - cancel_work_sync(&qp->s_iowait.iowork); - del_timer_sync(&qp->s_timer); - iowait_sdma_drain(&qp->s_iowait); - flush_tx_list(qp); - remove_qp(dev, qp); - wait_event(qp->wait, !atomic_read(&qp->refcount)); - spin_lock_irq(&qp->r_lock); - spin_lock(&qp->s_lock); - clear_mr_refs(qp, 1); - clear_ahg(qp); - reset_qp(qp, ibqp->qp_type); - } - break; - - case IB_QPS_RTR: - /* Allow event to re-trigger if QP set to RTR more than once */ - qp->r_flags &= ~HFI1_R_COMM_EST; - qp->state = new_state; - break; - - case IB_QPS_SQD: - qp->s_draining = qp->s_last != qp->s_cur; - qp->state = new_state; - break; +/** + * hfi1_check_send_wqe - validate wqe + * @qp - The qp + * @wqe - The built wqe + * + * validate wqe. This is called + * prior to inserting the wqe into + * the ring but after the wqe has been + * setup. + * + * Returns 0 on success, -EINVAL on failure + * + */ +int hfi1_check_send_wqe(struct rvt_qp *qp, + struct rvt_swqe *wqe) +{ + struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); + struct rvt_ah *ah; - case IB_QPS_SQE: - if (qp->ibqp.qp_type == IB_QPT_RC) - goto inval; - qp->state = new_state; + switch (qp->ibqp.qp_type) { + case IB_QPT_RC: + case IB_QPT_UC: + if (wqe->length > 0x80000000U) + return -EINVAL; break; - - case IB_QPS_ERR: - lastwqe = hfi1_error_qp(qp, IB_WC_WR_FLUSH_ERR); + case IB_QPT_SMI: + ah = ibah_to_rvtah(wqe->ud_wr.ah); + if (wqe->length > (1 << ah->log_pmtu)) + return -EINVAL; break; - + case IB_QPT_GSI: + case IB_QPT_UD: + ah = ibah_to_rvtah(wqe->ud_wr.ah); + if (wqe->length > (1 << ah->log_pmtu)) + return -EINVAL; + if (ibp->sl_to_sc[ah->attr.sl] == 0xf) + return -EINVAL; default: - qp->state = new_state; break; } - - if (attr_mask & IB_QP_PKEY_INDEX) - qp->s_pkey_index = attr->pkey_index; - - if (attr_mask & IB_QP_PORT) - qp->port_num = attr->port_num; - - if (attr_mask & IB_QP_DEST_QPN) - qp->remote_qpn = attr->dest_qp_num; - - if (attr_mask & IB_QP_SQ_PSN) { - qp->s_next_psn = attr->sq_psn & PSN_MODIFY_MASK; - qp->s_psn = qp->s_next_psn; - qp->s_sending_psn = qp->s_next_psn; - qp->s_last_psn = qp->s_next_psn - 1; - qp->s_sending_hpsn = qp->s_last_psn; - } - - if (attr_mask & IB_QP_RQ_PSN) - qp->r_psn = attr->rq_psn & PSN_MODIFY_MASK; - - if (attr_mask & IB_QP_ACCESS_FLAGS) - qp->qp_access_flags = attr->qp_access_flags; - - if (attr_mask & IB_QP_AV) { - qp->remote_ah_attr = attr->ah_attr; - qp->s_srate = attr->ah_attr.static_rate; - qp->srate_mbps = ib_rate_to_mbps(qp->s_srate); - qp->s_sc = ah_to_sc(ibqp->device, &qp->remote_ah_attr); - qp->s_sde = qp_to_sdma_engine(qp, qp->s_sc); - } - - if (attr_mask & IB_QP_ALT_PATH) { - qp->alt_ah_attr = attr->alt_ah_attr; - qp->s_alt_pkey_index = attr->alt_pkey_index; - } - - if (attr_mask & IB_QP_PATH_MIG_STATE) { - qp->s_mig_state = attr->path_mig_state; - if (mig) { - qp->remote_ah_attr = qp->alt_ah_attr; - qp->port_num = qp->alt_ah_attr.port_num; - qp->s_pkey_index = qp->s_alt_pkey_index; - qp->s_flags |= HFI1_S_AHG_CLEAR; - qp->s_sc = ah_to_sc(ibqp->device, &qp->remote_ah_attr); - qp->s_sde = qp_to_sdma_engine(qp, qp->s_sc); - } - } - - if (attr_mask & IB_QP_PATH_MTU) { - struct hfi1_ibport *ibp; - u8 sc, vl; - u32 mtu; - - dd = dd_from_dev(dev); - ibp = &dd->pport[qp->port_num - 1].ibport_data; - - sc = ibp->sl_to_sc[qp->remote_ah_attr.sl]; - vl = sc_to_vlt(dd, sc); - - mtu = verbs_mtu_enum_to_int(ibqp->device, pmtu); - if (vl < PER_VL_SEND_CONTEXTS) - mtu = min_t(u32, mtu, dd->vld[vl].mtu); - pmtu = mtu_to_enum(mtu, OPA_MTU_8192); - - qp->path_mtu = pmtu; - qp->pmtu = mtu; - } - - if (attr_mask & IB_QP_RETRY_CNT) { - qp->s_retry_cnt = attr->retry_cnt; - qp->s_retry = attr->retry_cnt; - } - - if (attr_mask & IB_QP_RNR_RETRY) { - qp->s_rnr_retry_cnt = attr->rnr_retry; - qp->s_rnr_retry = attr->rnr_retry; - } - - if (attr_mask & IB_QP_MIN_RNR_TIMER) - qp->r_min_rnr_timer = attr->min_rnr_timer; - - if (attr_mask & IB_QP_TIMEOUT) { - qp->timeout = attr->timeout; - qp->timeout_jiffies = - usecs_to_jiffies((4096UL * (1UL << qp->timeout)) / - 1000UL); - } - - if (attr_mask & IB_QP_QKEY) - qp->qkey = attr->qkey; - - if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) - qp->r_max_rd_atomic = attr->max_dest_rd_atomic; - - if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) - qp->s_max_rd_atomic = attr->max_rd_atomic; - - spin_unlock(&qp->s_lock); - spin_unlock_irq(&qp->r_lock); - - if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) - insert_qp(dev, qp); - - if (lastwqe) { - ev.device = qp->ibqp.device; - ev.element.qp = &qp->ibqp; - ev.event = IB_EVENT_QP_LAST_WQE_REACHED; - qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); - } - if (mig) { - ev.device = qp->ibqp.device; - ev.element.qp = &qp->ibqp; - ev.event = IB_EVENT_PATH_MIG; - qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); - } - ret = 0; - goto bail; - -inval: - spin_unlock(&qp->s_lock); - spin_unlock_irq(&qp->r_lock); - ret = -EINVAL; - -bail: - return ret; -} - -int hfi1_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, - int attr_mask, struct ib_qp_init_attr *init_attr) -{ - struct hfi1_qp *qp = to_iqp(ibqp); - - attr->qp_state = qp->state; - attr->cur_qp_state = attr->qp_state; - attr->path_mtu = qp->path_mtu; - attr->path_mig_state = qp->s_mig_state; - attr->qkey = qp->qkey; - attr->rq_psn = mask_psn(qp->r_psn); - attr->sq_psn = mask_psn(qp->s_next_psn); - attr->dest_qp_num = qp->remote_qpn; - attr->qp_access_flags = qp->qp_access_flags; - attr->cap.max_send_wr = qp->s_size - 1; - attr->cap.max_recv_wr = qp->ibqp.srq ? 0 : qp->r_rq.size - 1; - attr->cap.max_send_sge = qp->s_max_sge; - attr->cap.max_recv_sge = qp->r_rq.max_sge; - attr->cap.max_inline_data = 0; - attr->ah_attr = qp->remote_ah_attr; - attr->alt_ah_attr = qp->alt_ah_attr; - attr->pkey_index = qp->s_pkey_index; - attr->alt_pkey_index = qp->s_alt_pkey_index; - attr->en_sqd_async_notify = 0; - attr->sq_draining = qp->s_draining; - attr->max_rd_atomic = qp->s_max_rd_atomic; - attr->max_dest_rd_atomic = qp->r_max_rd_atomic; - attr->min_rnr_timer = qp->r_min_rnr_timer; - attr->port_num = qp->port_num; - attr->timeout = qp->timeout; - attr->retry_cnt = qp->s_retry_cnt; - attr->rnr_retry = qp->s_rnr_retry_cnt; - attr->alt_port_num = qp->alt_ah_attr.port_num; - attr->alt_timeout = qp->alt_timeout; - - init_attr->event_handler = qp->ibqp.event_handler; - init_attr->qp_context = qp->ibqp.qp_context; - init_attr->send_cq = qp->ibqp.send_cq; - init_attr->recv_cq = qp->ibqp.recv_cq; - init_attr->srq = qp->ibqp.srq; - init_attr->cap = attr->cap; - if (qp->s_flags & HFI1_S_SIGNAL_REQ_WR) - init_attr->sq_sig_type = IB_SIGNAL_REQ_WR; - else - init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; - init_attr->qp_type = qp->ibqp.qp_type; - init_attr->port_num = qp->port_num; - return 0; + return wqe->length <= piothreshold; } /** @@ -961,7 +282,7 @@ int hfi1_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, * * Returns the AETH. */ -__be32 hfi1_compute_aeth(struct hfi1_qp *qp) +__be32 hfi1_compute_aeth(struct rvt_qp *qp) { u32 aeth = qp->r_msn & HFI1_MSN_MASK; @@ -974,7 +295,7 @@ __be32 hfi1_compute_aeth(struct hfi1_qp *qp) } else { u32 min, max, x; u32 credits; - struct hfi1_rwq *wq = qp->r_rq.wq; + struct rvt_rwq *wq = qp->r_rq.wq; u32 head; u32 tail; @@ -1004,12 +325,13 @@ __be32 hfi1_compute_aeth(struct hfi1_qp *qp) x = (min + max) / 2; if (credit_table[x] == credits) break; - if (credit_table[x] > credits) + if (credit_table[x] > credits) { max = x; - else if (min == x) - break; - else + } else { + if (min == x) + break; min = x; + } } aeth |= x << HFI1_AETH_CREDIT_SHIFT; } @@ -1017,348 +339,58 @@ __be32 hfi1_compute_aeth(struct hfi1_qp *qp) } /** - * hfi1_create_qp - create a queue pair for a device - * @ibpd: the protection domain who's device we create the queue pair for - * @init_attr: the attributes of the queue pair - * @udata: user data for libibverbs.so - * - * Returns the queue pair on success, otherwise returns an errno. - * - * Called by the ib_create_qp() core verbs function. - */ -struct ib_qp *hfi1_create_qp(struct ib_pd *ibpd, - struct ib_qp_init_attr *init_attr, - struct ib_udata *udata) -{ - struct hfi1_qp *qp; - int err; - struct hfi1_swqe *swq = NULL; - struct hfi1_ibdev *dev; - struct hfi1_devdata *dd; - size_t sz; - size_t sg_list_sz; - struct ib_qp *ret; - - if (init_attr->cap.max_send_sge > hfi1_max_sges || - init_attr->cap.max_send_wr > hfi1_max_qp_wrs || - init_attr->create_flags) { - ret = ERR_PTR(-EINVAL); - goto bail; - } - - /* Check receive queue parameters if no SRQ is specified. */ - if (!init_attr->srq) { - if (init_attr->cap.max_recv_sge > hfi1_max_sges || - init_attr->cap.max_recv_wr > hfi1_max_qp_wrs) { - ret = ERR_PTR(-EINVAL); - goto bail; - } - if (init_attr->cap.max_send_sge + - init_attr->cap.max_send_wr + - init_attr->cap.max_recv_sge + - init_attr->cap.max_recv_wr == 0) { - ret = ERR_PTR(-EINVAL); - goto bail; - } - } - - switch (init_attr->qp_type) { - case IB_QPT_SMI: - case IB_QPT_GSI: - if (init_attr->port_num == 0 || - init_attr->port_num > ibpd->device->phys_port_cnt) { - ret = ERR_PTR(-EINVAL); - goto bail; - } - case IB_QPT_UC: - case IB_QPT_RC: - case IB_QPT_UD: - sz = sizeof(struct hfi1_sge) * - init_attr->cap.max_send_sge + - sizeof(struct hfi1_swqe); - swq = vmalloc((init_attr->cap.max_send_wr + 1) * sz); - if (swq == NULL) { - ret = ERR_PTR(-ENOMEM); - goto bail; - } - sz = sizeof(*qp); - sg_list_sz = 0; - if (init_attr->srq) { - struct hfi1_srq *srq = to_isrq(init_attr->srq); - - if (srq->rq.max_sge > 1) - sg_list_sz = sizeof(*qp->r_sg_list) * - (srq->rq.max_sge - 1); - } else if (init_attr->cap.max_recv_sge > 1) - sg_list_sz = sizeof(*qp->r_sg_list) * - (init_attr->cap.max_recv_sge - 1); - qp = kzalloc(sz + sg_list_sz, GFP_KERNEL); - if (!qp) { - ret = ERR_PTR(-ENOMEM); - goto bail_swq; - } - RCU_INIT_POINTER(qp->next, NULL); - qp->s_hdr = kzalloc(sizeof(*qp->s_hdr), GFP_KERNEL); - if (!qp->s_hdr) { - ret = ERR_PTR(-ENOMEM); - goto bail_qp; - } - qp->timeout_jiffies = - usecs_to_jiffies((4096UL * (1UL << qp->timeout)) / - 1000UL); - if (init_attr->srq) - sz = 0; - else { - qp->r_rq.size = init_attr->cap.max_recv_wr + 1; - qp->r_rq.max_sge = init_attr->cap.max_recv_sge; - sz = (sizeof(struct ib_sge) * qp->r_rq.max_sge) + - sizeof(struct hfi1_rwqe); - qp->r_rq.wq = vmalloc_user(sizeof(struct hfi1_rwq) + - qp->r_rq.size * sz); - if (!qp->r_rq.wq) { - ret = ERR_PTR(-ENOMEM); - goto bail_qp; - } - } - - /* - * ib_create_qp() will initialize qp->ibqp - * except for qp->ibqp.qp_num. - */ - spin_lock_init(&qp->r_lock); - spin_lock_init(&qp->s_lock); - spin_lock_init(&qp->r_rq.lock); - atomic_set(&qp->refcount, 0); - init_waitqueue_head(&qp->wait); - init_timer(&qp->s_timer); - qp->s_timer.data = (unsigned long)qp; - INIT_LIST_HEAD(&qp->rspwait); - qp->state = IB_QPS_RESET; - qp->s_wq = swq; - qp->s_size = init_attr->cap.max_send_wr + 1; - qp->s_max_sge = init_attr->cap.max_send_sge; - if (init_attr->sq_sig_type == IB_SIGNAL_REQ_WR) - qp->s_flags = HFI1_S_SIGNAL_REQ_WR; - dev = to_idev(ibpd->device); - dd = dd_from_dev(dev); - err = alloc_qpn(dd, &dev->qp_dev->qpn_table, init_attr->qp_type, - init_attr->port_num); - if (err < 0) { - ret = ERR_PTR(err); - vfree(qp->r_rq.wq); - goto bail_qp; - } - qp->ibqp.qp_num = err; - qp->port_num = init_attr->port_num; - reset_qp(qp, init_attr->qp_type); - - break; - - default: - /* Don't support raw QPs */ - ret = ERR_PTR(-ENOSYS); - goto bail; - } - - init_attr->cap.max_inline_data = 0; - - /* - * Return the address of the RWQ as the offset to mmap. - * See hfi1_mmap() for details. - */ - if (udata && udata->outlen >= sizeof(__u64)) { - if (!qp->r_rq.wq) { - __u64 offset = 0; - - err = ib_copy_to_udata(udata, &offset, - sizeof(offset)); - if (err) { - ret = ERR_PTR(err); - goto bail_ip; - } - } else { - u32 s = sizeof(struct hfi1_rwq) + qp->r_rq.size * sz; - - qp->ip = hfi1_create_mmap_info(dev, s, - ibpd->uobject->context, - qp->r_rq.wq); |