/*
+ * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved.
* Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
*/
#include <linux/err.h>
+#include <linux/sched.h>
#include <linux/vmalloc.h>
#include "ipath_verbs.h"
-#include "ips_common.h"
+#include "ipath_kernel.h"
#define BITS_PER_PAGE (PAGE_SIZE*BITS_PER_BYTE)
#define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1)
#define find_next_offset(map, off) find_next_zero_bit((map)->page, \
BITS_PER_PAGE, off)
-#define TRANS_INVALID 0
-#define TRANS_ANY2RST 1
-#define TRANS_RST2INIT 2
-#define TRANS_INIT2INIT 3
-#define TRANS_INIT2RTR 4
-#define TRANS_RTR2RTS 5
-#define TRANS_RTS2RTS 6
-#define TRANS_SQERR2RTS 7
-#define TRANS_ANY2ERR 8
-#define TRANS_RTS2SQD 9 /* XXX Wait for expected ACKs & signal event */
-#define TRANS_SQD2SQD 10 /* error if not drained & parameter change */
-#define TRANS_SQD2RTS 11 /* error if not drained */
-
/*
* Convert the AETH credit code into the number of credits.
*/
32768 /* 1E */
};
-static u32 alloc_qpn(struct ipath_qp_table *qpt)
+
+static void get_map_page(struct ipath_qp_table *qpt, struct qpn_map *map)
+{
+ unsigned long page = get_zeroed_page(GFP_KERNEL);
+ unsigned long flags;
+
+ /*
+ * Free the page if someone raced with us installing it.
+ */
+
+ spin_lock_irqsave(&qpt->lock, flags);
+ if (map->page)
+ free_page(page);
+ else
+ map->page = (void *)page;
+ spin_unlock_irqrestore(&qpt->lock, flags);
+}
+
+
+static int alloc_qpn(struct ipath_qp_table *qpt, enum ib_qp_type type)
{
u32 i, offset, max_scan, qpn;
struct qpn_map *map;
- u32 ret;
+ u32 ret = -1;
+
+ if (type == IB_QPT_SMI)
+ ret = 0;
+ else if (type == IB_QPT_GSI)
+ ret = 1;
+
+ if (ret != -1) {
+ map = &qpt->map[0];
+ if (unlikely(!map->page)) {
+ get_map_page(qpt, map);
+ if (unlikely(!map->page)) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+ }
+ if (!test_and_set_bit(ret, map->page))
+ atomic_dec(&map->n_free);
+ else
+ ret = -EBUSY;
+ goto bail;
+ }
qpn = qpt->last + 1;
if (qpn >= QPN_MAX)
max_scan = qpt->nmaps - !offset;
for (i = 0;;) {
if (unlikely(!map->page)) {
- unsigned long page = get_zeroed_page(GFP_KERNEL);
- unsigned long flags;
-
- /*
- * Free the page if someone raced with us
- * installing it:
- */
- spin_lock_irqsave(&qpt->lock, flags);
- if (map->page)
- free_page(page);
- else
- map->page = (void *)page;
- spin_unlock_irqrestore(&qpt->lock, flags);
+ get_map_page(qpt, map);
if (unlikely(!map->page))
break;
}
qpn = mk_qpn(qpt, map, offset);
}
- ret = 0;
+ ret = -ENOMEM;
bail:
return ret;
enum ib_qp_type type)
{
unsigned long flags;
- u32 qpn;
int ret;
- if (type == IB_QPT_SMI)
- qpn = 0;
- else if (type == IB_QPT_GSI)
- qpn = 1;
- else {
- /* Allocate the next available QPN */
- qpn = alloc_qpn(qpt);
- if (qpn == 0) {
- ret = -ENOMEM;
- goto bail;
- }
- }
- qp->ibqp.qp_num = qpn;
+ ret = alloc_qpn(qpt, type);
+ if (ret < 0)
+ goto bail;
+ qp->ibqp.qp_num = ret;
/* Add the QP to the hash table. */
spin_lock_irqsave(&qpt->lock, flags);
- qpn %= qpt->max;
- qp->next = qpt->table[qpn];
- qpt->table[qpn] = qp;
+ ret %= qpt->max;
+ qp->next = qpt->table[ret];
+ qpt->table[ret] = qp;
atomic_inc(&qp->refcount);
spin_unlock_irqrestore(&qpt->lock, flags);
{
struct ipath_qp *q, **qpp;
unsigned long flags;
- int fnd = 0;
spin_lock_irqsave(&qpt->lock, flags);
*qpp = qp->next;
qp->next = NULL;
atomic_dec(&qp->refcount);
- fnd = 1;
break;
}
}
spin_unlock_irqrestore(&qpt->lock, flags);
-
- if (!fnd)
- return;
-
- /* If QPN is not reserved, mark QPN free in the bitmap. */
- if (qp->ibqp.qp_num > 1)
- free_qpn(qpt, qp->ibqp.qp_num);
-
- wait_event(qp->wait, !atomic_read(&qp->refcount));
}
/**
- * ipath_free_all_qps - remove all QPs from the table
+ * ipath_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.
*/
-void ipath_free_all_qps(struct ipath_qp_table *qpt)
+unsigned ipath_free_all_qps(struct ipath_qp_table *qpt)
{
unsigned long flags;
- struct ipath_qp *qp, *nqp;
- u32 n;
+ struct ipath_qp *qp;
+ u32 n, qp_inuse = 0;
+ spin_lock_irqsave(&qpt->lock, flags);
for (n = 0; n < qpt->max; n++) {
- spin_lock_irqsave(&qpt->lock, flags);
qp = qpt->table[n];
qpt->table[n] = NULL;
- spin_unlock_irqrestore(&qpt->lock, flags);
-
- while (qp) {
- nqp = qp->next;
- if (qp->ibqp.qp_num > 1)
- free_qpn(qpt, qp->ibqp.qp_num);
- if (!atomic_dec_and_test(&qp->refcount) ||
- !ipath_destroy_qp(&qp->ibqp))
- _VERBS_INFO("QP memory leak!\n");
- qp = nqp;
- }
+
+ for (; qp; qp = qp->next)
+ qp_inuse++;
}
+ spin_unlock_irqrestore(&qpt->lock, flags);
- for (n = 0; n < ARRAY_SIZE(qpt->map); n++) {
+ for (n = 0; n < ARRAY_SIZE(qpt->map); n++)
if (qpt->map[n].page)
- free_page((unsigned long)qpt->map[n].page);
- }
+ free_page((unsigned long) qpt->map[n].page);
+ return qp_inuse;
}
/**
/**
* ipath_reset_qp - initialize the QP state to the reset state
* @qp: the QP to reset
+ * @type: the QP type
*/
-static void ipath_reset_qp(struct ipath_qp *qp)
+static void ipath_reset_qp(struct ipath_qp *qp, enum ib_qp_type type)
{
qp->remote_qpn = 0;
qp->qkey = 0;
qp->qp_access_flags = 0;
+ atomic_set(&qp->s_dma_busy, 0);
+ qp->s_flags &= IPATH_S_SIGNAL_REQ_WR;
qp->s_hdrwords = 0;
+ qp->s_wqe = NULL;
+ qp->s_pkt_delay = 0;
+ qp->s_draining = 0;
qp->s_psn = 0;
qp->r_psn = 0;
- atomic_set(&qp->msn, 0);
- if (qp->ibqp.qp_type == IB_QPT_RC) {
+ 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->r_state = IB_OPCODE_UC_SEND_LAST;
}
qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE;
- qp->s_nak_state = 0;
+ qp->r_nak_state = 0;
+ qp->r_aflags = 0;
+ qp->r_flags = 0;
qp->s_rnr_timeout = 0;
qp->s_head = 0;
qp->s_tail = 0;
qp->s_last = 0;
qp->s_ssn = 1;
qp->s_lsn = 0;
- qp->r_rq.head = 0;
- qp->r_rq.tail = 0;
- qp->r_reuse_sge = 0;
+ 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;
+ }
}
/**
- * ipath_error_qp - put a QP into an error state
- * @qp: the QP to put into an error state
+ * ipath_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.
- * QP r_rq.lock and s_lock should be held.
+ * Returns true if last WQE event should be generated.
+ * The QP s_lock should be held and interrupts disabled.
+ * If we are already in error state, just return.
*/
-static void ipath_error_qp(struct ipath_qp *qp)
+int ipath_error_qp(struct ipath_qp *qp, enum ib_wc_status err)
{
struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
struct ib_wc wc;
+ int ret = 0;
+
+ if (qp->state == IB_QPS_ERR)
+ goto bail;
- _VERBS_INFO("QP%d/%d in error state\n",
- qp->ibqp.qp_num, qp->remote_qpn);
+ qp->state = IB_QPS_ERR;
spin_lock(&dev->pending_lock);
- /* XXX What if its already removed by the timeout code? */
if (!list_empty(&qp->timerwait))
list_del_init(&qp->timerwait);
if (!list_empty(&qp->piowait))
list_del_init(&qp->piowait);
spin_unlock(&dev->pending_lock);
- wc.status = IB_WC_WR_FLUSH_ERR;
- wc.vendor_err = 0;
- wc.byte_len = 0;
- wc.imm_data = 0;
- wc.qp_num = qp->ibqp.qp_num;
- wc.src_qp = 0;
- wc.wc_flags = 0;
- wc.pkey_index = 0;
- wc.slid = 0;
- wc.sl = 0;
- wc.dlid_path_bits = 0;
- wc.port_num = 0;
-
- while (qp->s_last != qp->s_head) {
- struct ipath_swqe *wqe = get_swqe_ptr(qp, qp->s_last);
-
- wc.wr_id = wqe->wr.wr_id;
- wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
- if (++qp->s_last >= qp->s_size)
- qp->s_last = 0;
- ipath_cq_enter(to_icq(qp->ibqp.send_cq), &wc, 1);
- }
- qp->s_cur = qp->s_tail = qp->s_head;
- qp->s_hdrwords = 0;
- qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE;
+ /* Schedule the sending tasklet to drain the send work queue. */
+ if (qp->s_last != qp->s_head)
+ ipath_schedule_send(qp);
+ memset(&wc, 0, sizeof(wc));
+ wc.qp = &qp->ibqp;
wc.opcode = IB_WC_RECV;
- while (qp->r_rq.tail != qp->r_rq.head) {
- wc.wr_id = get_rwqe_ptr(&qp->r_rq, qp->r_rq.tail)->wr_id;
- if (++qp->r_rq.tail >= qp->r_rq.size)
- qp->r_rq.tail = 0;
+
+ if (test_and_clear_bit(IPATH_R_WRID_VALID, &qp->r_aflags)) {
+ wc.wr_id = qp->r_wr_id;
+ wc.status = err;
ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1);
}
+ wc.status = IB_WC_WR_FLUSH_ERR;
+
+ if (qp->r_rq.wq) {
+ struct ipath_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;
+ ipath_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;
}
/**
* @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 ipathverbs.so
*
* Returns 0 on success, otherwise returns an errno.
*/
int ipath_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
- int attr_mask)
+ int attr_mask, struct ib_udata *udata)
{
struct ipath_ibdev *dev = to_idev(ibqp->device);
struct ipath_qp *qp = to_iqp(ibqp);
enum ib_qp_state cur_state, new_state;
- unsigned long flags;
+ int lastwqe = 0;
int ret;
- spin_lock_irqsave(&qp->r_rq.lock, flags);
- spin_lock(&qp->s_lock);
+ spin_lock_irq(&qp->s_lock);
cur_state = attr_mask & IB_QP_CUR_STATE ?
attr->cur_qp_state : qp->state;
attr_mask))
goto inval;
- if (attr_mask & IB_QP_AV)
+ if (attr_mask & IB_QP_AV) {
if (attr->ah_attr.dlid == 0 ||
- attr->ah_attr.dlid >= IPS_MULTICAST_LID_BASE)
+ attr->ah_attr.dlid >= IPATH_MULTICAST_LID_BASE)
goto inval;
+ if ((attr->ah_attr.ah_flags & IB_AH_GRH) &&
+ (attr->ah_attr.grh.sgid_index > 1))
+ goto inval;
+ }
+
if (attr_mask & IB_QP_PKEY_INDEX)
- if (attr->pkey_index >= ipath_layer_get_npkeys(dev->dd))
+ if (attr->pkey_index >= ipath_get_npkeys(dev->dd))
goto inval;
if (attr_mask & IB_QP_MIN_RNR_TIMER)
if (attr->min_rnr_timer > 31)
goto inval;
+ if (attr_mask & IB_QP_PORT)
+ if (attr->port_num == 0 ||
+ attr->port_num > ibqp->device->phys_port_cnt)
+ goto inval;
+
+ /*
+ * don't allow invalid Path MTU values or greater than 2048
+ * unless we are configured for a 4KB MTU
+ */
+ if ((attr_mask & IB_QP_PATH_MTU) &&
+ (ib_mtu_enum_to_int(attr->path_mtu) == -1 ||
+ (attr->path_mtu > IB_MTU_2048 && !ipath_mtu4096)))
+ goto inval;
+
+ if (attr_mask & IB_QP_PATH_MIG_STATE)
+ if (attr->path_mig_state != IB_MIG_MIGRATED &&
+ attr->path_mig_state != IB_MIG_REARM)
+ goto inval;
+
+ if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
+ if (attr->max_dest_rd_atomic > IPATH_MAX_RDMA_ATOMIC)
+ goto inval;
+
switch (new_state) {
case IB_QPS_RESET:
- ipath_reset_qp(qp);
+ if (qp->state != IB_QPS_RESET) {
+ qp->state = IB_QPS_RESET;
+ spin_lock(&dev->pending_lock);
+ if (!list_empty(&qp->timerwait))
+ list_del_init(&qp->timerwait);
+ if (!list_empty(&qp->piowait))
+ list_del_init(&qp->piowait);
+ spin_unlock(&dev->pending_lock);
+ qp->s_flags &= ~IPATH_S_ANY_WAIT;
+ spin_unlock_irq(&qp->s_lock);
+ /* Stop the sending tasklet */
+ tasklet_kill(&qp->s_task);
+ wait_event(qp->wait_dma, !atomic_read(&qp->s_dma_busy));
+ spin_lock_irq(&qp->s_lock);
+ }
+ ipath_reset_qp(qp, ibqp->qp_type);
+ break;
+
+ case IB_QPS_SQD:
+ qp->s_draining = qp->s_last != qp->s_cur;
+ qp->state = new_state;
+ break;
+
+ case IB_QPS_SQE:
+ if (qp->ibqp.qp_type == IB_QPT_RC)
+ goto inval;
+ qp->state = new_state;
break;
case IB_QPS_ERR:
- ipath_error_qp(qp);
+ lastwqe = ipath_error_qp(qp, IB_WC_WR_FLUSH_ERR);
break;
default:
+ qp->state = new_state;
break;
-
}
if (attr_mask & IB_QP_PKEY_INDEX)
qp->remote_qpn = attr->dest_qp_num;
if (attr_mask & IB_QP_SQ_PSN) {
- qp->s_next_psn = attr->sq_psn;
+ qp->s_psn = qp->s_next_psn = attr->sq_psn;
qp->s_last_psn = qp->s_next_psn - 1;
}
if (attr_mask & IB_QP_ACCESS_FLAGS)
qp->qp_access_flags = attr->qp_access_flags;
- if (attr_mask & IB_QP_AV)
+ if (attr_mask & IB_QP_AV) {
qp->remote_ah_attr = attr->ah_attr;
+ qp->s_dmult = ipath_ib_rate_to_mult(attr->ah_attr.static_rate);
+ }
if (attr_mask & IB_QP_PATH_MTU)
qp->path_mtu = attr->path_mtu;
}
if (attr_mask & IB_QP_MIN_RNR_TIMER)
- qp->s_min_rnr_timer = attr->min_rnr_timer;
+ qp->r_min_rnr_timer = attr->min_rnr_timer;
+
+ if (attr_mask & IB_QP_TIMEOUT)
+ qp->timeout = attr->timeout;
if (attr_mask & IB_QP_QKEY)
qp->qkey = attr->qkey;
- if (attr_mask & IB_QP_PKEY_INDEX)
- qp->s_pkey_index = attr->pkey_index;
+ if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
+ qp->r_max_rd_atomic = attr->max_dest_rd_atomic;
- qp->state = new_state;
- spin_unlock(&qp->s_lock);
- spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
+ qp->s_max_rd_atomic = attr->max_rd_atomic;
- /*
- * If QP1 changed to the RTS state, try to move to the link to INIT
- * even if it was ACTIVE so the SM will reinitialize the SMA's
- * state.
- */
- if (qp->ibqp.qp_num == 1 && new_state == IB_QPS_RTS) {
- struct ipath_ibdev *dev = to_idev(ibqp->device);
+ spin_unlock_irq(&qp->s_lock);
+
+ if (lastwqe) {
+ struct ib_event ev;
- ipath_layer_set_linkstate(dev->dd, IPATH_IB_LINKDOWN);
+ 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);
}
ret = 0;
goto bail;
inval:
- spin_unlock(&qp->s_lock);
- spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ spin_unlock_irq(&qp->s_lock);
ret = -EINVAL;
bail:
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->r_rq.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->pkey_index = qp->s_pkey_index;
attr->alt_pkey_index = 0;
attr->en_sqd_async_notify = 0;
- attr->sq_draining = 0;
- attr->max_rd_atomic = 1;
- attr->max_dest_rd_atomic = 1;
- attr->min_rnr_timer = qp->s_min_rnr_timer;
+ 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 = 1;
- attr->timeout = 0;
+ attr->timeout = qp->timeout;
attr->retry_cnt = qp->s_retry_cnt;
- attr->rnr_retry = qp->s_rnr_retry;
+ attr->rnr_retry = qp->s_rnr_retry_cnt;
attr->alt_port_num = 0;
attr->alt_timeout = 0;
init_attr->recv_cq = qp->ibqp.recv_cq;
init_attr->srq = qp->ibqp.srq;
init_attr->cap = attr->cap;
- init_attr->sq_sig_type =
- (qp->s_flags & (1 << IPATH_S_SIGNAL_REQ_WR))
- ? IB_SIGNAL_REQ_WR : 0;
+ if (qp->s_flags & IPATH_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 = 1;
return 0;
* @qp: the queue pair to compute the AETH for
*
* Returns the AETH.
- *
- * The QP s_lock should be held.
*/
__be32 ipath_compute_aeth(struct ipath_qp *qp)
{
- u32 aeth = atomic_read(&qp->msn) & IPS_MSN_MASK;
+ u32 aeth = qp->r_msn & IPATH_MSN_MASK;
- if (qp->s_nak_state) {
- aeth |= qp->s_nak_state << IPS_AETH_CREDIT_SHIFT;
- } else if (qp->ibqp.srq) {
+ if (qp->ibqp.srq) {
/*
* Shared receive queues don't generate credits.
* Set the credit field to the invalid value.
*/
- aeth |= IPS_AETH_CREDIT_INVAL << IPS_AETH_CREDIT_SHIFT;
+ aeth |= IPATH_AETH_CREDIT_INVAL << IPATH_AETH_CREDIT_SHIFT;
} else {
u32 min, max, x;
u32 credits;
-
+ struct ipath_rwq *wq = qp->r_rq.wq;
+ u32 head;
+ u32 tail;
+
+ /* sanity check pointers before trusting them */
+ head = wq->head;
+ if (head >= qp->r_rq.size)
+ head = 0;
+ tail = wq->tail;
+ if (tail >= qp->r_rq.size)
+ tail = 0;
/*
* Compute the number of credits available (RWQEs).
* XXX Not holding the r_rq.lock here so there is a small
* chance that the pair of reads are not atomic.
*/
- credits = qp->r_rq.head - qp->r_rq.tail;
+ credits = head - tail;
if ((int)credits < 0)
credits += qp->r_rq.size;
/*
else
min = x;
}
- aeth |= x << IPS_AETH_CREDIT_SHIFT;
+ aeth |= x << IPATH_AETH_CREDIT_SHIFT;
}
return cpu_to_be32(aeth);
}
struct ipath_swqe *swq = NULL;
struct ipath_ibdev *dev;
size_t sz;
+ size_t sg_list_sz;
struct ib_qp *ret;
- if (init_attr->cap.max_send_sge > 255 ||
- init_attr->cap.max_recv_sge > 255) {
- ret = ERR_PTR(-ENOMEM);
+ if (init_attr->create_flags) {
+ ret = ERR_PTR(-EINVAL);
goto bail;
}
+ if (init_attr->cap.max_send_sge > ib_ipath_max_sges ||
+ init_attr->cap.max_send_wr > ib_ipath_max_qp_wrs) {
+ 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 > ib_ipath_max_sges ||
+ init_attr->cap.max_recv_wr > ib_ipath_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_UC:
case IB_QPT_RC:
+ case IB_QPT_UD:
+ case IB_QPT_SMI:
+ case IB_QPT_GSI:
sz = sizeof(struct ipath_sge) *
init_attr->cap.max_send_sge +
sizeof(struct ipath_swqe);
ret = ERR_PTR(-ENOMEM);
goto bail;
}
- /* FALLTHROUGH */
- case IB_QPT_UD:
- case IB_QPT_SMI:
- case IB_QPT_GSI:
- qp = kmalloc(sizeof(*qp), GFP_KERNEL);
+ sz = sizeof(*qp);
+ sg_list_sz = 0;
+ if (init_attr->srq) {
+ struct ipath_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 = kmalloc(sz + sg_list_sz, GFP_KERNEL);
if (!qp) {
ret = ERR_PTR(-ENOMEM);
- goto bail;
+ goto bail_swq;
}
- qp->r_rq.size = init_attr->cap.max_recv_wr + 1;
- sz = sizeof(struct ipath_sge) *
- init_attr->cap.max_recv_sge +
- sizeof(struct ipath_rwqe);
- qp->r_rq.wq = vmalloc(qp->r_rq.size * sz);
- if (!qp->r_rq.wq) {
- kfree(qp);
- ret = ERR_PTR(-ENOMEM);
- goto bail;
+ if (sg_list_sz && (init_attr->qp_type == IB_QPT_UD ||
+ init_attr->qp_type == IB_QPT_SMI ||
+ init_attr->qp_type == IB_QPT_GSI)) {
+ qp->r_ud_sg_list = kmalloc(sg_list_sz, GFP_KERNEL);
+ if (!qp->r_ud_sg_list) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_qp;
+ }
+ } else
+ qp->r_ud_sg_list = NULL;
+ if (init_attr->srq) {
+ sz = 0;
+ qp->r_rq.size = 0;
+ qp->r_rq.max_sge = 0;
+ qp->r_rq.wq = NULL;
+ init_attr->cap.max_recv_wr = 0;
+ init_attr->cap.max_recv_sge = 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 ipath_rwqe);
+ qp->r_rq.wq = vmalloc_user(sizeof(struct ipath_rwq) +
+ qp->r_rq.size * sz);
+ if (!qp->r_rq.wq) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_sg_list;
+ }
}
/*
spin_lock_init(&qp->r_rq.lock);
atomic_set(&qp->refcount, 0);
init_waitqueue_head(&qp->wait);
- tasklet_init(&qp->s_task,
- init_attr->qp_type == IB_QPT_RC ?
- ipath_do_rc_send : ipath_do_uc_send,
- (unsigned long)qp);
+ init_waitqueue_head(&qp->wait_dma);
+ tasklet_init(&qp->s_task, ipath_do_send, (unsigned long)qp);
INIT_LIST_HEAD(&qp->piowait);
INIT_LIST_HEAD(&qp->timerwait);
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;
- qp->r_rq.max_sge = init_attr->cap.max_recv_sge;
- qp->s_flags = init_attr->sq_sig_type == IB_SIGNAL_REQ_WR ?
- 1 << IPATH_S_SIGNAL_REQ_WR : 0;
+ if (init_attr->sq_sig_type == IB_SIGNAL_REQ_WR)
+ qp->s_flags = IPATH_S_SIGNAL_REQ_WR;
+ else
+ qp->s_flags = 0;
dev = to_idev(ibpd->device);
err = ipath_alloc_qpn(&dev->qp_table, qp,
init_attr->qp_type);
if (err) {
- vfree(swq);
- vfree(qp->r_rq.wq);
- kfree(qp);
ret = ERR_PTR(err);
- goto bail;
+ vfree(qp->r_rq.wq);
+ goto bail_sg_list;
}
- ipath_reset_qp(qp);
-
- /* Tell the core driver that the kernel SMA is present. */
- if (init_attr->qp_type == IB_QPT_SMI)
- ipath_layer_set_verbs_flags(dev->dd,
- IPATH_VERBS_KERNEL_SMA);
+ qp->ip = NULL;
+ qp->s_tx = NULL;
+ ipath_reset_qp(qp, init_attr->qp_type);
break;
default:
init_attr->cap.max_inline_data = 0;
+ /*
+ * Return the address of the RWQ as the offset to mmap.
+ * See ipath_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 ipath_rwq) +
+ qp->r_rq.size * sz;
+
+ qp->ip =
+ ipath_create_mmap_info(dev, s,
+ ibpd->uobject->context,
+ qp->r_rq.wq);
+ if (!qp->ip) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_ip;
+ }
+
+ err = ib_copy_to_udata(udata, &(qp->ip->offset),
+ sizeof(qp->ip->offset));
+ if (err) {
+ ret = ERR_PTR(err);
+ goto bail_ip;
+ }
+ }
+ }
+
+ spin_lock(&dev->n_qps_lock);
+ if (dev->n_qps_allocated == ib_ipath_max_qps) {
+ spin_unlock(&dev->n_qps_lock);
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_ip;
+ }
+
+ dev->n_qps_allocated++;
+ spin_unlock(&dev->n_qps_lock);
+
+ if (qp->ip) {
+ spin_lock_irq(&dev->pending_lock);
+ list_add(&qp->ip->pending_mmaps, &dev->pending_mmaps);
+ spin_unlock_irq(&dev->pending_lock);
+ }
+
ret = &qp->ibqp;
+ goto bail;
+bail_ip:
+ if (qp->ip)
+ kref_put(&qp->ip->ref, ipath_release_mmap_info);
+ else
+ vfree(qp->r_rq.wq);
+ ipath_free_qp(&dev->qp_table, qp);
+ free_qpn(&dev->qp_table, qp->ibqp.qp_num);
+bail_sg_list:
+ kfree(qp->r_ud_sg_list);
+bail_qp:
+ kfree(qp);
+bail_swq:
+ vfree(swq);
bail:
return ret;
}
{
struct ipath_qp *qp = to_iqp(ibqp);
struct ipath_ibdev *dev = to_idev(ibqp->device);
- unsigned long flags;
-
- /* Tell the core driver that the kernel SMA is gone. */
- if (qp->ibqp.qp_type == IB_QPT_SMI)
- ipath_layer_set_verbs_flags(dev->dd, 0);
-
- spin_lock_irqsave(&qp->r_rq.lock, flags);
- spin_lock(&qp->s_lock);
- qp->state = IB_QPS_ERR;
- spin_unlock(&qp->s_lock);
- spin_unlock_irqrestore(&qp->r_rq.lock, flags);
-
- /* Stop the sending tasklet. */
- tasklet_kill(&qp->s_task);
- /* Make sure the QP isn't on the timeout list. */
- spin_lock_irqsave(&dev->pending_lock, flags);
- if (!list_empty(&qp->timerwait))
- list_del_init(&qp->timerwait);
- if (!list_empty(&qp->piowait))
- list_del_init(&qp->piowait);
- spin_unlock_irqrestore(&dev->pending_lock, flags);
+ /* Make sure HW and driver activity is stopped. */
+ spin_lock_irq(&qp->s_lock);
+ if (qp->state != IB_QPS_RESET) {
+ qp->state = IB_QPS_RESET;
+ spin_lock(&dev->pending_lock);
+ if (!list_empty(&qp->timerwait))
+ list_del_init(&qp->timerwait);
+ if (!list_empty(&qp->piowait))
+ list_del_init(&qp->piowait);
+ spin_unlock(&dev->pending_lock);
+ qp->s_flags &= ~IPATH_S_ANY_WAIT;
+ spin_unlock_irq(&qp->s_lock);
+ /* Stop the sending tasklet */
+ tasklet_kill(&qp->s_task);
+ wait_event(qp->wait_dma, !atomic_read(&qp->s_dma_busy));
+ } else
+ spin_unlock_irq(&qp->s_lock);
+
+ ipath_free_qp(&dev->qp_table, qp);
+
+ if (qp->s_tx) {
+ atomic_dec(&qp->refcount);
+ if (qp->s_tx->txreq.flags & IPATH_SDMA_TXREQ_F_FREEBUF)
+ kfree(qp->s_tx->txreq.map_addr);
+ spin_lock_irq(&dev->pending_lock);
+ list_add(&qp->s_tx->txreq.list, &dev->txreq_free);
+ spin_unlock_irq(&dev->pending_lock);
+ qp->s_tx = NULL;
+ }
- /*
- * Make sure that the QP is not in the QPN table so receive
- * interrupts will discard packets for this QP. XXX Also remove QP
- * from multicast table.
- */
- if (atomic_read(&qp->refcount) != 0)
- ipath_free_qp(&dev->qp_table, qp);
+ wait_event(qp->wait, !atomic_read(&qp->refcount));
+ /* all user's cleaned up, mark it available */
+ free_qpn(&dev->qp_table, qp->ibqp.qp_num);
+ spin_lock(&dev->n_qps_lock);
+ dev->n_qps_allocated--;
+ spin_unlock(&dev->n_qps_lock);
+
+ if (qp->ip)
+ kref_put(&qp->ip->ref, ipath_release_mmap_info);
+ else
+ vfree(qp->r_rq.wq);
+ kfree(qp->r_ud_sg_list);
vfree(qp->s_wq);
- vfree(qp->r_rq.wq);
kfree(qp);
return 0;
}
}
/**
- * ipath_sqerror_qp - put a QP's send queue into an error state
- * @qp: QP who's send queue will be put into an error state
- * @wc: the WC responsible for putting the QP in this state
- *
- * Flushes the send work queue.
- * The QP s_lock should be held.
- */
-
-void ipath_sqerror_qp(struct ipath_qp *qp, struct ib_wc *wc)
-{
- struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
- struct ipath_swqe *wqe = get_swqe_ptr(qp, qp->s_last);
-
- _VERBS_INFO("Send queue error on QP%d/%d: err: %d\n",
- qp->ibqp.qp_num, qp->remote_qpn, wc->status);
-
- spin_lock(&dev->pending_lock);
- /* XXX What if its already removed by the timeout code? */
- if (!list_empty(&qp->timerwait))
- list_del_init(&qp->timerwait);
- if (!list_empty(&qp->piowait))
- list_del_init(&qp->piowait);
- spin_unlock(&dev->pending_lock);
-
- ipath_cq_enter(to_icq(qp->ibqp.send_cq), wc, 1);
- if (++qp->s_last >= qp->s_size)
- qp->s_last = 0;
-
- wc->status = IB_WC_WR_FLUSH_ERR;
-
- while (qp->s_last != qp->s_head) {
- wc->wr_id = wqe->wr.wr_id;
- wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
- ipath_cq_enter(to_icq(qp->ibqp.send_cq), wc, 1);
- if (++qp->s_last >= qp->s_size)
- qp->s_last = 0;
- wqe = get_swqe_ptr(qp, qp->s_last);
- }
- qp->s_cur = qp->s_tail = qp->s_head;
- qp->state = IB_QPS_SQE;
-}
-
-/**
* ipath_get_credit - flush the send work queue of a QP
* @qp: the qp who's send work queue to flush
* @aeth: the Acknowledge Extended Transport Header
*/
void ipath_get_credit(struct ipath_qp *qp, u32 aeth)
{
- u32 credit = (aeth >> IPS_AETH_CREDIT_SHIFT) & IPS_AETH_CREDIT_MASK;
+ u32 credit = (aeth >> IPATH_AETH_CREDIT_SHIFT) & IPATH_AETH_CREDIT_MASK;
/*
* If the credit is invalid, we can send
* as many packets as we like. Otherwise, we have to
* honor the credit field.
*/
- if (credit == IPS_AETH_CREDIT_INVAL) {
+ if (credit == IPATH_AETH_CREDIT_INVAL)
qp->s_lsn = (u32) -1;
- } else if (qp->s_lsn != (u32) -1) {
+ else if (qp->s_lsn != (u32) -1) {
/* Compute new LSN (i.e., MSN + credit) */
- credit = (aeth + credit_table[credit]) & IPS_MSN_MASK;
+ credit = (aeth + credit_table[credit]) & IPATH_MSN_MASK;
if (ipath_cmp24(credit, qp->s_lsn) > 0)
qp->s_lsn = credit;
}
/* Restart sending if it was blocked due to lack of credits. */
- if (qp->s_cur != qp->s_head &&
+ if ((qp->s_flags & IPATH_S_WAIT_SSN_CREDIT) &&
+ qp->s_cur != qp->s_head &&
(qp->s_lsn == (u32) -1 ||
ipath_cmp24(get_swqe_ptr(qp, qp->s_cur)->ssn,
qp->s_lsn + 1) <= 0))
- tasklet_hi_schedule(&qp->s_task);
+ ipath_schedule_send(qp);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff