/*
* Copyright (c) 2004 Topspin Communications. All rights reserved.
+ * Copyright (c) 2005 Cisco Systems. All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* $Id: mthca_qp.c 1355 2004-12-17 15:23:43Z roland $
*/
-#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/slab.h>
-#include <ib_verbs.h>
-#include <ib_cache.h>
-#include <ib_pack.h>
+#include <asm/io.h>
+
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_cache.h>
+#include <rdma/ib_pack.h>
#include "mthca_dev.h"
#include "mthca_cmd.h"
+#include "mthca_memfree.h"
+#include "mthca_wqe.h"
enum {
MTHCA_MAX_DIRECT_QP_SIZE = 4 * PAGE_SIZE,
MTHCA_ACK_REQ_FREQ = 10,
MTHCA_FLIGHT_LIMIT = 9,
- MTHCA_UD_HEADER_SIZE = 72 /* largest UD header possible */
+ MTHCA_UD_HEADER_SIZE = 72, /* largest UD header possible */
+ MTHCA_INLINE_HEADER_SIZE = 4, /* data segment overhead for inline */
+ MTHCA_INLINE_CHUNK_SIZE = 16 /* inline data segment chunk */
};
enum {
MTHCA_QP_BIT_RSC = 1 << 3
};
+enum {
+ MTHCA_SEND_DOORBELL_FENCE = 1 << 5
+};
+
struct mthca_qp_path {
- u32 port_pkey;
- u8 rnr_retry;
- u8 g_mylmc;
- u16 rlid;
- u8 ackto;
- u8 mgid_index;
- u8 static_rate;
- u8 hop_limit;
- u32 sl_tclass_flowlabel;
- u8 rgid[16];
+ __be32 port_pkey;
+ u8 rnr_retry;
+ u8 g_mylmc;
+ __be16 rlid;
+ u8 ackto;
+ u8 mgid_index;
+ u8 static_rate;
+ u8 hop_limit;
+ __be32 sl_tclass_flowlabel;
+ u8 rgid[16];
} __attribute__((packed));
struct mthca_qp_context {
- u32 flags;
- u32 sched_queue;
- u32 mtu_msgmax;
- u32 usr_page;
- u32 local_qpn;
- u32 remote_qpn;
- u32 reserved1[2];
+ __be32 flags;
+ __be32 tavor_sched_queue; /* Reserved on Arbel */
+ u8 mtu_msgmax;
+ u8 rq_size_stride; /* Reserved on Tavor */
+ u8 sq_size_stride; /* Reserved on Tavor */
+ u8 rlkey_arbel_sched_queue; /* Reserved on Tavor */
+ __be32 usr_page;
+ __be32 local_qpn;
+ __be32 remote_qpn;
+ u32 reserved1[2];
struct mthca_qp_path pri_path;
struct mthca_qp_path alt_path;
- u32 rdd;
- u32 pd;
- u32 wqe_base;
- u32 wqe_lkey;
- u32 params1;
- u32 reserved2;
- u32 next_send_psn;
- u32 cqn_snd;
- u32 next_snd_wqe[2];
- u32 last_acked_psn;
- u32 ssn;
- u32 params2;
- u32 rnr_nextrecvpsn;
- u32 ra_buff_indx;
- u32 cqn_rcv;
- u32 next_rcv_wqe[2];
- u32 qkey;
- u32 srqn;
- u32 rmsn;
- u32 reserved3[19];
+ __be32 rdd;
+ __be32 pd;
+ __be32 wqe_base;
+ __be32 wqe_lkey;
+ __be32 params1;
+ __be32 reserved2;
+ __be32 next_send_psn;
+ __be32 cqn_snd;
+ __be32 snd_wqe_base_l; /* Next send WQE on Tavor */
+ __be32 snd_db_index; /* (debugging only entries) */
+ __be32 last_acked_psn;
+ __be32 ssn;
+ __be32 params2;
+ __be32 rnr_nextrecvpsn;
+ __be32 ra_buff_indx;
+ __be32 cqn_rcv;
+ __be32 rcv_wqe_base_l; /* Next recv WQE on Tavor */
+ __be32 rcv_db_index; /* (debugging only entries) */
+ __be32 qkey;
+ __be32 srqn;
+ __be32 rmsn;
+ __be16 rq_wqe_counter; /* reserved on Tavor */
+ __be16 sq_wqe_counter; /* reserved on Tavor */
+ u32 reserved3[18];
} __attribute__((packed));
struct mthca_qp_param {
- u32 opt_param_mask;
- u32 reserved1;
+ __be32 opt_param_mask;
+ u32 reserved1;
struct mthca_qp_context context;
- u32 reserved2[62];
+ u32 reserved2[62];
} __attribute__((packed));
enum {
MTHCA_QP_OPTPAR_SCHED_QUEUE = 1 << 16
};
-enum {
- MTHCA_OPCODE_NOP = 0x00,
- MTHCA_OPCODE_RDMA_WRITE = 0x08,
- MTHCA_OPCODE_RDMA_WRITE_IMM = 0x09,
- MTHCA_OPCODE_SEND = 0x0a,
- MTHCA_OPCODE_SEND_IMM = 0x0b,
- MTHCA_OPCODE_RDMA_READ = 0x10,
- MTHCA_OPCODE_ATOMIC_CS = 0x11,
- MTHCA_OPCODE_ATOMIC_FA = 0x12,
- MTHCA_OPCODE_BIND_MW = 0x18,
- MTHCA_OPCODE_INVALID = 0xff
-};
-
-enum {
- MTHCA_NEXT_DBD = 1 << 7,
- MTHCA_NEXT_FENCE = 1 << 6,
- MTHCA_NEXT_CQ_UPDATE = 1 << 3,
- MTHCA_NEXT_EVENT_GEN = 1 << 2,
- MTHCA_NEXT_SOLICIT = 1 << 1,
-
- MTHCA_MLX_VL15 = 1 << 17,
- MTHCA_MLX_SLR = 1 << 16
-};
-
-struct mthca_next_seg {
- u32 nda_op; /* [31:6] next WQE [4:0] next opcode */
- u32 ee_nds; /* [31:8] next EE [7] DBD [6] F [5:0] next WQE size */
- u32 flags; /* [3] CQ [2] Event [1] Solicit */
- u32 imm; /* immediate data */
-};
-
-struct mthca_ud_seg {
- u32 reserved1;
- u32 lkey;
- u64 av_addr;
- u32 reserved2[4];
- u32 dqpn;
- u32 qkey;
- u32 reserved3[2];
-};
-
-struct mthca_bind_seg {
- u32 flags; /* [31] Atomic [30] rem write [29] rem read */
- u32 reserved;
- u32 new_rkey;
- u32 lkey;
- u64 addr;
- u64 length;
-};
-
-struct mthca_raddr_seg {
- u64 raddr;
- u32 rkey;
- u32 reserved;
-};
-
-struct mthca_atomic_seg {
- u64 swap_add;
- u64 compare;
-};
-
-struct mthca_data_seg {
- u32 byte_count;
- u32 lkey;
- u64 addr;
-};
-
-struct mthca_mlx_seg {
- u32 nda_op;
- u32 nds;
- u32 flags; /* [17] VL15 [16] SLR [14:12] static rate
- [11:8] SL [3] C [2] E */
- u16 rlid;
- u16 vcrc;
+static const u8 mthca_opcode[] = {
+ [IB_WR_SEND] = MTHCA_OPCODE_SEND,
+ [IB_WR_SEND_WITH_IMM] = MTHCA_OPCODE_SEND_IMM,
+ [IB_WR_RDMA_WRITE] = MTHCA_OPCODE_RDMA_WRITE,
+ [IB_WR_RDMA_WRITE_WITH_IMM] = MTHCA_OPCODE_RDMA_WRITE_IMM,
+ [IB_WR_RDMA_READ] = MTHCA_OPCODE_RDMA_READ,
+ [IB_WR_ATOMIC_CMP_AND_SWP] = MTHCA_OPCODE_ATOMIC_CS,
+ [IB_WR_ATOMIC_FETCH_AND_ADD] = MTHCA_OPCODE_ATOMIC_FA,
};
static int is_sqp(struct mthca_dev *dev, struct mthca_qp *qp)
(PAGE_SIZE - 1));
}
+static void mthca_wq_reset(struct mthca_wq *wq)
+{
+ wq->next_ind = 0;
+ wq->last_comp = wq->max - 1;
+ wq->head = 0;
+ wq->tail = 0;
+}
+
void mthca_qp_event(struct mthca_dev *dev, u32 qpn,
enum ib_event_type event_type)
{
spin_lock(&dev->qp_table.lock);
qp = mthca_array_get(&dev->qp_table.qp, qpn & (dev->limits.num_qps - 1));
if (qp)
- atomic_inc(&qp->refcount);
+ ++qp->refcount;
spin_unlock(&dev->qp_table.lock);
if (!qp) {
return;
}
+ if (event_type == IB_EVENT_PATH_MIG)
+ qp->port = qp->alt_port;
+
event.device = &dev->ib_dev;
event.event = event_type;
event.element.qp = &qp->ibqp;
if (qp->ibqp.event_handler)
qp->ibqp.event_handler(&event, qp->ibqp.qp_context);
- if (atomic_dec_and_test(&qp->refcount))
+ spin_lock(&dev->qp_table.lock);
+ if (!--qp->refcount)
wake_up(&qp->wait);
+ spin_unlock(&dev->qp_table.lock);
}
static int to_mthca_state(enum ib_qp_state ib_state)
}
}
-static const struct {
- int trans;
- u32 req_param[NUM_TRANS];
- u32 opt_param[NUM_TRANS];
-} state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
- [IB_QPS_RESET] = {
- [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
- [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
- [IB_QPS_INIT] = {
- .trans = MTHCA_TRANS_RST2INIT,
- .req_param = {
- [UD] = (IB_QP_PKEY_INDEX |
- IB_QP_PORT |
- IB_QP_QKEY),
- [RC] = (IB_QP_PKEY_INDEX |
- IB_QP_PORT |
- IB_QP_ACCESS_FLAGS),
- [MLX] = (IB_QP_PKEY_INDEX |
- IB_QP_QKEY),
- },
- /* bug-for-bug compatibility with VAPI: */
- .opt_param = {
- [MLX] = IB_QP_PORT
- }
- },
- },
- [IB_QPS_INIT] = {
- [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
- [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
- [IB_QPS_INIT] = {
- .trans = MTHCA_TRANS_INIT2INIT,
- .opt_param = {
- [UD] = (IB_QP_PKEY_INDEX |
- IB_QP_PORT |
- IB_QP_QKEY),
- [RC] = (IB_QP_PKEY_INDEX |
- IB_QP_PORT |
- IB_QP_ACCESS_FLAGS),
- [MLX] = (IB_QP_PKEY_INDEX |
- IB_QP_QKEY),
- }
- },
- [IB_QPS_RTR] = {
- .trans = MTHCA_TRANS_INIT2RTR,
- .req_param = {
- [RC] = (IB_QP_AV |
- IB_QP_PATH_MTU |
- IB_QP_DEST_QPN |
- IB_QP_RQ_PSN |
- IB_QP_MAX_DEST_RD_ATOMIC |
- IB_QP_MIN_RNR_TIMER),
- },
- .opt_param = {
- [UD] = (IB_QP_PKEY_INDEX |
- IB_QP_QKEY),
- [RC] = (IB_QP_ALT_PATH |
- IB_QP_ACCESS_FLAGS |
- IB_QP_PKEY_INDEX),
- [MLX] = (IB_QP_PKEY_INDEX |
- IB_QP_QKEY),
- }
- }
- },
- [IB_QPS_RTR] = {
- [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
- [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
- [IB_QPS_RTS] = {
- .trans = MTHCA_TRANS_RTR2RTS,
- .req_param = {
- [UD] = IB_QP_SQ_PSN,
- [RC] = (IB_QP_TIMEOUT |
- IB_QP_RETRY_CNT |
- IB_QP_RNR_RETRY |
- IB_QP_SQ_PSN |
- IB_QP_MAX_QP_RD_ATOMIC),
- [MLX] = IB_QP_SQ_PSN,
- },
- .opt_param = {
- [UD] = (IB_QP_CUR_STATE |
- IB_QP_QKEY),
- [RC] = (IB_QP_CUR_STATE |
- IB_QP_ALT_PATH |
- IB_QP_ACCESS_FLAGS |
- IB_QP_PKEY_INDEX |
- IB_QP_MIN_RNR_TIMER |
- IB_QP_PATH_MIG_STATE),
- [MLX] = (IB_QP_CUR_STATE |
- IB_QP_QKEY),
- }
- }
- },
- [IB_QPS_RTS] = {
- [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
- [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
- [IB_QPS_RTS] = {
- .trans = MTHCA_TRANS_RTS2RTS,
- .opt_param = {
- [UD] = (IB_QP_CUR_STATE |
- IB_QP_QKEY),
- [RC] = (IB_QP_ACCESS_FLAGS |
- IB_QP_ALT_PATH |
- IB_QP_PATH_MIG_STATE |
- IB_QP_MIN_RNR_TIMER),
- [MLX] = (IB_QP_CUR_STATE |
- IB_QP_QKEY),
- }
- },
- [IB_QPS_SQD] = {
- .trans = MTHCA_TRANS_RTS2SQD,
- },
- },
- [IB_QPS_SQD] = {
- [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
- [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
- [IB_QPS_RTS] = {
- .trans = MTHCA_TRANS_SQD2RTS,
- .opt_param = {
- [UD] = (IB_QP_CUR_STATE |
- IB_QP_QKEY),
- [RC] = (IB_QP_CUR_STATE |
- IB_QP_ALT_PATH |
- IB_QP_ACCESS_FLAGS |
- IB_QP_MIN_RNR_TIMER |
- IB_QP_PATH_MIG_STATE),
- [MLX] = (IB_QP_CUR_STATE |
- IB_QP_QKEY),
- }
- },
- [IB_QPS_SQD] = {
- .trans = MTHCA_TRANS_SQD2SQD,
- .opt_param = {
- [UD] = (IB_QP_PKEY_INDEX |
- IB_QP_QKEY),
- [RC] = (IB_QP_AV |
- IB_QP_TIMEOUT |
- IB_QP_RETRY_CNT |
- IB_QP_RNR_RETRY |
- IB_QP_MAX_QP_RD_ATOMIC |
- IB_QP_MAX_DEST_RD_ATOMIC |
- IB_QP_CUR_STATE |
- IB_QP_ALT_PATH |
- IB_QP_ACCESS_FLAGS |
- IB_QP_PKEY_INDEX |
- IB_QP_MIN_RNR_TIMER |
- IB_QP_PATH_MIG_STATE),
- [MLX] = (IB_QP_PKEY_INDEX |
- IB_QP_QKEY),
- }
- }
- },
- [IB_QPS_SQE] = {
- [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
- [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
- [IB_QPS_RTS] = {
- .trans = MTHCA_TRANS_SQERR2RTS,
- .opt_param = {
- [UD] = (IB_QP_CUR_STATE |
- IB_QP_QKEY),
- [RC] = (IB_QP_CUR_STATE |
- IB_QP_MIN_RNR_TIMER),
- [MLX] = (IB_QP_CUR_STATE |
- IB_QP_QKEY),
- }
- }
- },
- [IB_QPS_ERR] = {
- [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
- [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR }
- }
-};
-
static void store_attrs(struct mthca_sqp *sqp, struct ib_qp_attr *attr,
int attr_mask)
{
memset(¶m, 0, sizeof param);
- param.enable_1x = 1;
- param.enable_4x = 1;
- param.vl_cap = dev->limits.vl_cap;
- param.mtu_cap = dev->limits.mtu_cap;
- param.gid_cap = dev->limits.gid_table_len;
- param.pkey_cap = dev->limits.pkey_table_len;
+ param.port_width = dev->limits.port_width_cap;
+ param.vl_cap = dev->limits.vl_cap;
+ param.mtu_cap = dev->limits.mtu_cap;
+ param.gid_cap = dev->limits.gid_table_len;
+ param.pkey_cap = dev->limits.pkey_table_len;
err = mthca_INIT_IB(dev, ¶m, port, &status);
if (err)
mthca_warn(dev, "INIT_IB returned status %02x.\n", status);
}
-int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
+static __be32 get_hw_access_flags(struct mthca_qp *qp, struct ib_qp_attr *attr,
+ int attr_mask)
+{
+ u8 dest_rd_atomic;
+ u32 access_flags;
+ u32 hw_access_flags = 0;
+
+ if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
+ dest_rd_atomic = attr->max_dest_rd_atomic;
+ else
+ dest_rd_atomic = qp->resp_depth;
+
+ if (attr_mask & IB_QP_ACCESS_FLAGS)
+ access_flags = attr->qp_access_flags;
+ else
+ access_flags = qp->atomic_rd_en;
+
+ if (!dest_rd_atomic)
+ access_flags &= IB_ACCESS_REMOTE_WRITE;
+
+ if (access_flags & IB_ACCESS_REMOTE_READ)
+ hw_access_flags |= MTHCA_QP_BIT_RRE;
+ if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
+ hw_access_flags |= MTHCA_QP_BIT_RAE;
+ if (access_flags & IB_ACCESS_REMOTE_WRITE)
+ hw_access_flags |= MTHCA_QP_BIT_RWE;
+
+ return cpu_to_be32(hw_access_flags);
+}
+
+static inline enum ib_qp_state to_ib_qp_state(int mthca_state)
+{
+ switch (mthca_state) {
+ case MTHCA_QP_STATE_RST: return IB_QPS_RESET;
+ case MTHCA_QP_STATE_INIT: return IB_QPS_INIT;
+ case MTHCA_QP_STATE_RTR: return IB_QPS_RTR;
+ case MTHCA_QP_STATE_RTS: return IB_QPS_RTS;
+ case MTHCA_QP_STATE_DRAINING:
+ case MTHCA_QP_STATE_SQD: return IB_QPS_SQD;
+ case MTHCA_QP_STATE_SQE: return IB_QPS_SQE;
+ case MTHCA_QP_STATE_ERR: return IB_QPS_ERR;
+ default: return -1;
+ }
+}
+
+static inline enum ib_mig_state to_ib_mig_state(int mthca_mig_state)
+{
+ switch (mthca_mig_state) {
+ case 0: return IB_MIG_ARMED;
+ case 1: return IB_MIG_REARM;
+ case 3: return IB_MIG_MIGRATED;
+ default: return -1;
+ }
+}
+
+static int to_ib_qp_access_flags(int mthca_flags)
+{
+ int ib_flags = 0;
+
+ if (mthca_flags & MTHCA_QP_BIT_RRE)
+ ib_flags |= IB_ACCESS_REMOTE_READ;
+ if (mthca_flags & MTHCA_QP_BIT_RWE)
+ ib_flags |= IB_ACCESS_REMOTE_WRITE;
+ if (mthca_flags & MTHCA_QP_BIT_RAE)
+ ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
+
+ return ib_flags;
+}
+
+static void to_ib_ah_attr(struct mthca_dev *dev, struct ib_ah_attr *ib_ah_attr,
+ struct mthca_qp_path *path)
+{
+ memset(ib_ah_attr, 0, sizeof *path);
+ ib_ah_attr->port_num = (be32_to_cpu(path->port_pkey) >> 24) & 0x3;
+
+ if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->limits.num_ports)
+ return;
+
+ ib_ah_attr->dlid = be16_to_cpu(path->rlid);
+ ib_ah_attr->sl = be32_to_cpu(path->sl_tclass_flowlabel) >> 28;
+ ib_ah_attr->src_path_bits = path->g_mylmc & 0x7f;
+ ib_ah_attr->static_rate = mthca_rate_to_ib(dev,
+ path->static_rate & 0xf,
+ ib_ah_attr->port_num);
+ ib_ah_attr->ah_flags = (path->g_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
+ if (ib_ah_attr->ah_flags) {
+ ib_ah_attr->grh.sgid_index = path->mgid_index & (dev->limits.gid_table_len - 1);
+ ib_ah_attr->grh.hop_limit = path->hop_limit;
+ ib_ah_attr->grh.traffic_class =
+ (be32_to_cpu(path->sl_tclass_flowlabel) >> 20) & 0xff;
+ ib_ah_attr->grh.flow_label =
+ be32_to_cpu(path->sl_tclass_flowlabel) & 0xfffff;
+ memcpy(ib_ah_attr->grh.dgid.raw,
+ path->rgid, sizeof ib_ah_attr->grh.dgid.raw);
+ }
+}
+
+int mthca_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
+ struct ib_qp_init_attr *qp_init_attr)
+{
+ struct mthca_dev *dev = to_mdev(ibqp->device);
+ struct mthca_qp *qp = to_mqp(ibqp);
+ int err = 0;
+ struct mthca_mailbox *mailbox = NULL;
+ struct mthca_qp_param *qp_param;
+ struct mthca_qp_context *context;
+ int mthca_state;
+ u8 status;
+
+ if (qp->state == IB_QPS_RESET) {
+ qp_attr->qp_state = IB_QPS_RESET;
+ goto done;
+ }
+
+ mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
+ if (IS_ERR(mailbox))
+ return PTR_ERR(mailbox);
+
+ err = mthca_QUERY_QP(dev, qp->qpn, 0, mailbox, &status);
+ if (err)
+ goto out;
+ if (status) {
+ mthca_warn(dev, "QUERY_QP returned status %02x\n", status);
+ err = -EINVAL;
+ goto out;
+ }
+
+ qp_param = mailbox->buf;
+ context = &qp_param->context;
+ mthca_state = be32_to_cpu(context->flags) >> 28;
+
+ qp_attr->qp_state = to_ib_qp_state(mthca_state);
+ qp_attr->path_mtu = context->mtu_msgmax >> 5;
+ qp_attr->path_mig_state =
+ to_ib_mig_state((be32_to_cpu(context->flags) >> 11) & 0x3);
+ qp_attr->qkey = be32_to_cpu(context->qkey);
+ qp_attr->rq_psn = be32_to_cpu(context->rnr_nextrecvpsn) & 0xffffff;
+ qp_attr->sq_psn = be32_to_cpu(context->next_send_psn) & 0xffffff;
+ qp_attr->dest_qp_num = be32_to_cpu(context->remote_qpn) & 0xffffff;
+ qp_attr->qp_access_flags =
+ to_ib_qp_access_flags(be32_to_cpu(context->params2));
+
+ if (qp->transport == RC || qp->transport == UC) {
+ to_ib_ah_attr(dev, &qp_attr->ah_attr, &context->pri_path);
+ to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context->alt_path);
+ qp_attr->alt_pkey_index =
+ be32_to_cpu(context->alt_path.port_pkey) & 0x7f;
+ qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num;
+ }
+
+ qp_attr->pkey_index = be32_to_cpu(context->pri_path.port_pkey) & 0x7f;
+ qp_attr->port_num =
+ (be32_to_cpu(context->pri_path.port_pkey) >> 24) & 0x3;
+
+ /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
+ qp_attr->sq_draining = mthca_state == MTHCA_QP_STATE_DRAINING;
+
+ qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context->params1) >> 21) & 0x7);
+
+ qp_attr->max_dest_rd_atomic =
+ 1 << ((be32_to_cpu(context->params2) >> 21) & 0x7);
+ qp_attr->min_rnr_timer =
+ (be32_to_cpu(context->rnr_nextrecvpsn) >> 24) & 0x1f;
+ qp_attr->timeout = context->pri_path.ackto >> 3;
+ qp_attr->retry_cnt = (be32_to_cpu(context->params1) >> 16) & 0x7;
+ qp_attr->rnr_retry = context->pri_path.rnr_retry >> 5;
+ qp_attr->alt_timeout = context->alt_path.ackto >> 3;
+
+done:
+ qp_attr->cur_qp_state = qp_attr->qp_state;
+ qp_attr->cap.max_send_wr = qp->sq.max;
+ qp_attr->cap.max_recv_wr = qp->rq.max;
+ qp_attr->cap.max_send_sge = qp->sq.max_gs;
+ qp_attr->cap.max_recv_sge = qp->rq.max_gs;
+ qp_attr->cap.max_inline_data = qp->max_inline_data;
+
+ qp_init_attr->cap = qp_attr->cap;
+
+out:
+ mthca_free_mailbox(dev, mailbox);
+ return err;
+}
+
+static int mthca_path_set(struct mthca_dev *dev, struct ib_ah_attr *ah,
+ struct mthca_qp_path *path, u8 port)
+{
+ path->g_mylmc = ah->src_path_bits & 0x7f;
+ path->rlid = cpu_to_be16(ah->dlid);
+ path->static_rate = mthca_get_rate(dev, ah->static_rate, port);
+
+ if (ah->ah_flags & IB_AH_GRH) {
+ if (ah->grh.sgid_index >= dev->limits.gid_table_len) {
+ mthca_dbg(dev, "sgid_index (%u) too large. max is %d\n",
+ ah->grh.sgid_index, dev->limits.gid_table_len-1);
+ return -1;
+ }
+
+ path->g_mylmc |= 1 << 7;
+ path->mgid_index = ah->grh.sgid_index;
+ path->hop_limit = ah->grh.hop_limit;
+ path->sl_tclass_flowlabel =
+ cpu_to_be32((ah->sl << 28) |
+ (ah->grh.traffic_class << 20) |
+ (ah->grh.flow_label));
+ memcpy(path->rgid, ah->grh.dgid.raw, 16);
+ } else
+ path->sl_tclass_flowlabel = cpu_to_be32(ah->sl << 28);
+
+ return 0;
+}
+
+int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
+ struct ib_udata *udata)
{
struct mthca_dev *dev = to_mdev(ibqp->device);
struct mthca_qp *qp = to_mqp(ibqp);
enum ib_qp_state cur_state, new_state;
- void *mailbox = NULL;
+ struct mthca_mailbox *mailbox;
struct mthca_qp_param *qp_param;
struct mthca_qp_context *qp_context;
- u32 req_param, opt_param;
+ u32 sqd_event = 0;
u8 status;
- int err;
+ int err = -EINVAL;
+
+ mutex_lock(&qp->mutex);
if (attr_mask & IB_QP_CUR_STATE) {
- if (attr->cur_qp_state != IB_QPS_RTR &&
- attr->cur_qp_state != IB_QPS_RTS &&
- attr->cur_qp_state != IB_QPS_SQD &&
- attr->cur_qp_state != IB_QPS_SQE)
- return -EINVAL;
- else
- cur_state = attr->cur_qp_state;
+ cur_state = attr->cur_qp_state;
} else {
- spin_lock_irq(&qp->lock);
+ spin_lock_irq(&qp->sq.lock);
+ spin_lock(&qp->rq.lock);
cur_state = qp->state;
- spin_unlock_irq(&qp->lock);
+ spin_unlock(&qp->rq.lock);
+ spin_unlock_irq(&qp->sq.lock);
}
- if (attr_mask & IB_QP_STATE) {
- if (attr->qp_state < 0 || attr->qp_state > IB_QPS_ERR)
- return -EINVAL;
- new_state = attr->qp_state;
- } else
- new_state = cur_state;
+ new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
- if (state_table[cur_state][new_state].trans == MTHCA_TRANS_INVALID) {
- mthca_dbg(dev, "Illegal QP transition "
- "%d->%d\n", cur_state, new_state);
- return -EINVAL;
+ if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask)) {
+ mthca_dbg(dev, "Bad QP transition (transport %d) "
+ "%d->%d with attr 0x%08x\n",
+ qp->transport, cur_state, new_state,
+ attr_mask);
+ goto out;
}
- req_param = state_table[cur_state][new_state].req_param[qp->transport];
- opt_param = state_table[cur_state][new_state].opt_param[qp->transport];
+ if ((attr_mask & IB_QP_PKEY_INDEX) &&
+ attr->pkey_index >= dev->limits.pkey_table_len) {
+ mthca_dbg(dev, "P_Key index (%u) too large. max is %d\n",
+ attr->pkey_index, dev->limits.pkey_table_len-1);
+ goto out;
+ }
- if ((req_param & attr_mask) != req_param) {
- mthca_dbg(dev, "QP transition "
- "%d->%d missing req attr 0x%08x\n",
- cur_state, new_state,
- req_param & ~attr_mask);
- return -EINVAL;
+ if ((attr_mask & IB_QP_PORT) &&
+ (attr->port_num == 0 || attr->port_num > dev->limits.num_ports)) {
+ mthca_dbg(dev, "Port number (%u) is invalid\n", attr->port_num);
+ goto out;
}
- if (attr_mask & ~(req_param | opt_param | IB_QP_STATE)) {
- mthca_dbg(dev, "QP transition (transport %d) "
- "%d->%d has extra attr 0x%08x\n",
- qp->transport,
- cur_state, new_state,
- attr_mask & ~(req_param | opt_param |
- IB_QP_STATE));
- return -EINVAL;
+ if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
+ attr->max_rd_atomic > dev->limits.max_qp_init_rdma) {
+ mthca_dbg(dev, "Max rdma_atomic as initiator %u too large (max is %d)\n",
+ attr->max_rd_atomic, dev->limits.max_qp_init_rdma);
+ goto out;
}
- mailbox = kmalloc(sizeof (*qp_param) + MTHCA_CMD_MAILBOX_EXTRA, GFP_KERNEL);
- if (!mailbox)
- return -ENOMEM;
- qp_param = MAILBOX_ALIGN(mailbox);
+ if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
+ attr->max_dest_rd_atomic > 1 << dev->qp_table.rdb_shift) {
+ mthca_dbg(dev, "Max rdma_atomic as responder %u too large (max %d)\n",
+ attr->max_dest_rd_atomic, 1 << dev->qp_table.rdb_shift);
+ goto out;
+ }
+
+ mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
+ if (IS_ERR(mailbox)) {
+ err = PTR_ERR(mailbox);
+ goto out;
+ }
+ qp_param = mailbox->buf;
qp_context = &qp_param->context;
memset(qp_param, 0, sizeof *qp_param);
break;
}
}
- /* leave sched_queue as 0 */
+
+ /* leave tavor_sched_queue as 0 */
+
if (qp->transport == MLX || qp->transport == UD)
- qp_context->mtu_msgmax = cpu_to_be32((IB_MTU_2048 << 29) |
- (11 << 24));
+ qp_context->mtu_msgmax = (IB_MTU_2048 << 5) | 11;
else if (attr_mask & IB_QP_PATH_MTU) {
- qp_context->mtu_msgmax = cpu_to_be32((attr->path_mtu << 29) |
- (31 << 24));
+ if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_2048) {
+ mthca_dbg(dev, "path MTU (%u) is invalid\n",
+ attr->path_mtu);
+ goto out_mailbox;
+ }
+ qp_context->mtu_msgmax = (attr->path_mtu << 5) | 31;
+ }
+
+ if (mthca_is_memfree(dev)) {
+ if (qp->rq.max)
+ qp_context->rq_size_stride = ilog2(qp->rq.max) << 3;
+ qp_context->rq_size_stride |= qp->rq.wqe_shift - 4;
+
+ if (qp->sq.max)
+ qp_context->sq_size_stride = ilog2(qp->sq.max) << 3;
+ qp_context->sq_size_stride |= qp->sq.wqe_shift - 4;
}
- qp_context->usr_page = cpu_to_be32(MTHCA_KAR_PAGE);
+
+ /* leave arbel_sched_queue as 0 */
+
+ if (qp->ibqp.uobject)
+ qp_context->usr_page =
+ cpu_to_be32(to_mucontext(qp->ibqp.uobject->context)->uar.index);
+ else
+ qp_context->usr_page = cpu_to_be32(dev->driver_uar.index);
qp_context->local_qpn = cpu_to_be32(qp->qpn);
if (attr_mask & IB_QP_DEST_QPN) {
qp_context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
if (qp->transport == MLX)
qp_context->pri_path.port_pkey |=
- cpu_to_be32(to_msqp(qp)->port << 24);
+ cpu_to_be32(qp->port << 24);
else {
if (attr_mask & IB_QP_PORT) {
qp_context->pri_path.port_pkey |=
}
if (attr_mask & IB_QP_RNR_RETRY) {
- qp_context->pri_path.rnr_retry = attr->rnr_retry << 5;
- qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_RETRY);
+ qp_context->alt_path.rnr_retry = qp_context->pri_path.rnr_retry =
+ attr->rnr_retry << 5;
+ qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_RETRY |
+ MTHCA_QP_OPTPAR_ALT_RNR_RETRY);
}
if (attr_mask & IB_QP_AV) {
- qp_context->pri_path.g_mylmc = attr->ah_attr.src_path_bits & 0x7f;
- qp_context->pri_path.rlid = cpu_to_be16(attr->ah_attr.dlid);
- qp_context->pri_path.static_rate = (!!attr->ah_attr.static_rate) << 3;
- if (attr->ah_attr.ah_flags & IB_AH_GRH) {
- qp_context->pri_path.g_mylmc |= 1 << 7;
- qp_context->pri_path.mgid_index = attr->ah_attr.grh.sgid_index;
- qp_context->pri_path.hop_limit = attr->ah_attr.grh.hop_limit;
- qp_context->pri_path.sl_tclass_flowlabel =
- cpu_to_be32((attr->ah_attr.sl << 28) |
- (attr->ah_attr.grh.traffic_class << 20) |
- (attr->ah_attr.grh.flow_label));
- memcpy(qp_context->pri_path.rgid,
- attr->ah_attr.grh.dgid.raw, 16);
- } else {
- qp_context->pri_path.sl_tclass_flowlabel =
- cpu_to_be32(attr->ah_attr.sl << 28);
- }
+ if (mthca_path_set(dev, &attr->ah_attr, &qp_context->pri_path,
+ attr_mask & IB_QP_PORT ? attr->port_num : qp->port))
+ goto out_mailbox;
+
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH);
}
if (attr_mask & IB_QP_TIMEOUT) {
- qp_context->pri_path.ackto = attr->timeout;
+ qp_context->pri_path.ackto = attr->timeout << 3;
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_ACK_TIMEOUT);
}
- /* XXX alt_path */
+ if (attr_mask & IB_QP_ALT_PATH) {
+ if (attr->alt_pkey_index >= dev->limits.pkey_table_len) {
+ mthca_dbg(dev, "Alternate P_Key index (%u) too large. max is %d\n",
+ attr->alt_pkey_index, dev->limits.pkey_table_len-1);
+ goto out_mailbox;
+ }
+
+ if (attr->alt_port_num == 0 || attr->alt_port_num > dev->limits.num_ports) {
+ mthca_dbg(dev, "Alternate port number (%u) is invalid\n",
+ attr->alt_port_num);
+ goto out_mailbox;
+ }
+
+ if (mthca_path_set(dev, &attr->alt_ah_attr, &qp_context->alt_path,
+ attr->alt_ah_attr.port_num))
+ goto out_mailbox;
+
+ qp_context->alt_path.port_pkey |= cpu_to_be32(attr->alt_pkey_index |
+ attr->alt_port_num << 24);
+ qp_context->alt_path.ackto = attr->alt_timeout << 3;
+ qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_ALT_ADDR_PATH);
+ }
/* leave rdd as 0 */
qp_context->pd = cpu_to_be32(to_mpd(ibqp->pd)->pd_num);
qp_context->wqe_lkey = cpu_to_be32(qp->mr.ibmr.lkey);
qp_context->params1 = cpu_to_be32((MTHCA_ACK_REQ_FREQ << 28) |
(MTHCA_FLIGHT_LIMIT << 24) |
- MTHCA_QP_BIT_SRE |
- MTHCA_QP_BIT_SWE |
- MTHCA_QP_BIT_SAE);
- if (qp->sq.policy == IB_SIGNAL_ALL_WR)
+ MTHCA_QP_BIT_SWE);
+ if (qp->sq_policy == IB_SIGNAL_ALL_WR)
qp_context->params1 |= cpu_to_be32(MTHCA_QP_BIT_SSC);
if (attr_mask & IB_QP_RETRY_CNT) {
qp_context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RETRY_COUNT);
}
- if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
- qp_context->params1 |= cpu_to_be32(min(attr->max_dest_rd_atomic ?
- ffs(attr->max_dest_rd_atomic) - 1 : 0,
- 7) << 21);
+ if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
+ if (attr->max_rd_atomic) {
+ qp_context->params1 |=
+ cpu_to_be32(MTHCA_QP_BIT_SRE |
+ MTHCA_QP_BIT_SAE);
+ qp_context->params1 |=
+ cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
+ }
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_SRA_MAX);
}
qp_context->next_send_psn = cpu_to_be32(attr->sq_psn);
qp_context->cqn_snd = cpu_to_be32(to_mcq(ibqp->send_cq)->cqn);
- if (attr_mask & IB_QP_ACCESS_FLAGS) {
- /*
- * Only enable RDMA/atomics if we have responder
- * resources set to a non-zero value.
- */
- if (qp->resp_depth) {
- qp_context->params2 |=
- cpu_to_be32(attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE ?
- MTHCA_QP_BIT_RWE : 0);
- qp_context->params2 |=
- cpu_to_be32(attr->qp_access_flags & IB_ACCESS_REMOTE_READ ?
- MTHCA_QP_BIT_RRE : 0);
+ if (mthca_is_memfree(dev)) {
+ qp_context->snd_wqe_base_l = cpu_to_be32(qp->send_wqe_offset);
+ qp_context->snd_db_index = cpu_to_be32(qp->sq.db_index);
+ }
+
+ if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
+ if (attr->max_dest_rd_atomic)
qp_context->params2 |=
- cpu_to_be32(attr->qp_access_flags & IB_ACCESS_REMOTE_ATOMIC ?
- MTHCA_QP_BIT_RAE : 0);
- }
+ cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
+ qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RRA_MAX);
+ }
+
+ if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
+ qp_context->params2 |= get_hw_access_flags(qp, attr, attr_mask);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RWE |
MTHCA_QP_OPTPAR_RRE |
MTHCA_QP_OPTPAR_RAE);
-
- qp->atomic_rd_en = attr->qp_access_flags;
}
- if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
- u8 rra_max;
-
- if (qp->resp_depth && !attr->max_rd_atomic) {
- /*
- * Lowering our responder resources to zero.
- * Turn off RDMA/atomics as responder.
- * (RWE/RRE/RAE in params2 already zero)
- */
- qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RWE |
- MTHCA_QP_OPTPAR_RRE |
- MTHCA_QP_OPTPAR_RAE);
- }
-
- if (!qp->resp_depth && attr->max_rd_atomic) {
- /*
- * Increasing our responder resources from
- * zero. Turn on RDMA/atomics as appropriate.
- */
- qp_context->params2 |=
- cpu_to_be32(qp->atomic_rd_en & IB_ACCESS_REMOTE_WRITE ?
- MTHCA_QP_BIT_RWE : 0);
- qp_context->params2 |=
- cpu_to_be32(qp->atomic_rd_en & IB_ACCESS_REMOTE_READ ?
- MTHCA_QP_BIT_RRE : 0);
- qp_context->params2 |=
- cpu_to_be32(qp->atomic_rd_en & IB_ACCESS_REMOTE_ATOMIC ?
- MTHCA_QP_BIT_RAE : 0);
-
- qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RWE |
- MTHCA_QP_OPTPAR_RRE |
- MTHCA_QP_OPTPAR_RAE);
- }
-
- for (rra_max = 0;
- 1 << rra_max < attr->max_rd_atomic &&
- rra_max < dev->qp_table.rdb_shift;
- ++rra_max)
- ; /* nothing */
-
- qp_context->params2 |= cpu_to_be32(rra_max << 21);
- qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RRA_MAX);
+ qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RSC);
- qp->resp_depth = attr->max_rd_atomic;
- }
+ if (ibqp->srq)
+ qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RIC);
- if (qp->rq.policy == IB_SIGNAL_ALL_WR)
- qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RSC);
if (attr_mask & IB_QP_MIN_RNR_TIMER) {
qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_TIMEOUT);
if (attr_mask & IB_QP_RQ_PSN)
qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
- qp_context->ra_buff_indx = dev->qp_table.rdb_base +
- ((qp->qpn & (dev->limits.num_qps - 1)) * MTHCA_RDB_ENTRY_SIZE <<
- dev->qp_table.rdb_shift);
+ qp_context->ra_buff_indx =
+ cpu_to_be32(dev->qp_table.rdb_base +
+ ((qp->qpn & (dev->limits.num_qps - 1)) * MTHCA_RDB_ENTRY_SIZE <<
+ dev->qp_table.rdb_shift));
qp_context->cqn_rcv = cpu_to_be32(to_mcq(ibqp->recv_cq)->cqn);
+ if (mthca_is_memfree(dev))
+ qp_context->rcv_db_index = cpu_to_be32(qp->rq.db_index);
+
if (attr_mask & IB_QP_QKEY) {
qp_context->qkey = cpu_to_be32(attr->qkey);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_Q_KEY);
}
- err = mthca_MODIFY_QP(dev, state_table[cur_state][new_state].trans,
- qp->qpn, 0, qp_param, 0, &status);
+ if (ibqp->srq)
+ qp_context->srqn = cpu_to_be32(1 << 24 |
+ to_msrq(ibqp->srq)->srqn);
+
+ if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
+ attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY &&
+ attr->en_sqd_async_notify)
+ sqd_event = 1 << 31;
+
+ err = mthca_MODIFY_QP(dev, cur_state, new_state, qp->qpn, 0,
+ mailbox, sqd_event, &status);
+ if (err)
+ goto out_mailbox;
if (status) {
- mthca_warn(dev, "modify QP %d returned status %02x.\n",
- state_table[cur_state][new_state].trans, status);
+ mthca_warn(dev, "modify QP %d->%d returned status %02x.\n",
+ cur_state, new_state, status);
err = -EINVAL;
+ goto out_mailbox;
}
- if (!err)
- qp->state = new_state;
-
- kfree(mailbox);
+ qp->state = new_state;
+ if (attr_mask & IB_QP_ACCESS_FLAGS)
+ qp->atomic_rd_en = attr->qp_access_flags;
+ if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
+ qp->resp_depth = attr->max_dest_rd_atomic;
+ if (attr_mask & IB_QP_PORT)
+ qp->port = attr->port_num;
+ if (attr_mask & IB_QP_ALT_PATH)
+ qp->alt_port = attr->alt_port_num;
if (is_sqp(dev, qp))
store_attrs(to_msqp(qp), attr, attr_mask);
/*
- * If we are moving QP0 to RTR, bring the IB link up; if we
- * are moving QP0 to RESET or ERROR, bring the link back down.
+ * If we moved QP0 to RTR, bring the IB link up; if we moved
+ * QP0 to RESET or ERROR, bring the link back down.
*/
if (is_qp0(dev, qp)) {
if (cur_state != IB_QPS_RTR &&
new_state == IB_QPS_RTR)
- init_port(dev, to_msqp(qp)->port);
+ init_port(dev, qp->port);
if (cur_state != IB_QPS_RESET &&
cur_state != IB_QPS_ERR &&
(new_state == IB_QPS_RESET ||
new_state == IB_QPS_ERR))
- mthca_CLOSE_IB(dev, to_msqp(qp)->port, &status);
+ mthca_CLOSE_IB(dev, qp->port, &status);
}
+ /*
+ * If we moved a kernel QP to RESET, clean up all old CQ
+ * entries and reinitialize the QP.
+ */
+ if (new_state == IB_QPS_RESET && !qp->ibqp.uobject) {
+ mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq), qp->qpn,
+ qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
+ if (qp->ibqp.send_cq != qp->ibqp.recv_cq)
+ mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq), qp->qpn, NULL);
+
+ mthca_wq_reset(&qp->sq);
+ qp->sq.last = get_send_wqe(qp, qp->sq.max - 1);
+
+ mthca_wq_reset(&qp->rq);
+ qp->rq.last = get_recv_wqe(qp, qp->rq.max - 1);
+
+ if (mthca_is_memfree(dev)) {
+ *qp->sq.db = 0;
+ *qp->rq.db = 0;
+ }
+ }
+
+out_mailbox:
+ mthca_free_mailbox(dev, mailbox);
+
+out:
+ mutex_unlock(&qp->mutex);
return err;
}
+static int mthca_max_data_size(struct mthca_dev *dev, struct mthca_qp *qp, int desc_sz)
+{
+ /*
+ * Calculate the maximum size of WQE s/g segments, excluding
+ * the next segment and other non-data segments.
+ */
+ int max_data_size = desc_sz - sizeof (struct mthca_next_seg);
+
+ switch (qp->transport) {
+ case MLX:
+ max_data_size -= 2 * sizeof (struct mthca_data_seg);
+ break;
+
+ case UD:
+ if (mthca_is_memfree(dev))
+ max_data_size -= sizeof (struct mthca_arbel_ud_seg);
+ else
+ max_data_size -= sizeof (struct mthca_tavor_ud_seg);
+ break;
+
+ default:
+ max_data_size -= sizeof (struct mthca_raddr_seg);
+ break;
+ }
+
+ return max_data_size;
+}
+
+static inline int mthca_max_inline_data(struct mthca_pd *pd, int max_data_size)
+{
+ /* We don't support inline data for kernel QPs (yet). */
+ return pd->ibpd.uobject ? max_data_size - MTHCA_INLINE_HEADER_SIZE : 0;
+}
+
+static void mthca_adjust_qp_caps(struct mthca_dev *dev,
+ struct mthca_pd *pd,
+ struct mthca_qp *qp)
+{
+ int max_data_size = mthca_max_data_size(dev, qp,
+ min(dev->limits.max_desc_sz,
+ 1 << qp->sq.wqe_shift));
+
+ qp->max_inline_data = mthca_max_inline_data(pd, max_data_size);
+
+ qp->sq.max_gs = min_t(int, dev->limits.max_sg,
+ max_data_size / sizeof (struct mthca_data_seg));
+ qp->rq.max_gs = min_t(int, dev->limits.max_sg,
+ (min(dev->limits.max_desc_sz, 1 << qp->rq.wqe_shift) -
+ sizeof (struct mthca_next_seg)) /
+ sizeof (struct mthca_data_seg));
+}
+
/*
* Allocate and register buffer for WQEs. qp->rq.max, sq.max,
* rq.max_gs and sq.max_gs must all be assigned.
struct mthca_qp *qp)
{
int size;
- int i;
- int npages, shift;
- dma_addr_t t;
- u64 *dma_list = NULL;
int err = -ENOMEM;
size = sizeof (struct mthca_next_seg) +
qp->rq.max_gs * sizeof (struct mthca_data_seg);
+ if (size > dev->limits.max_desc_sz)
+ return -EINVAL;
+
for (qp->rq.wqe_shift = 6; 1 << qp->rq.wqe_shift < size;
qp->rq.wqe_shift++)
; /* nothing */
- size = sizeof (struct mthca_next_seg) +
- qp->sq.max_gs * sizeof (struct mthca_data_seg);
- if (qp->transport == MLX)
+ size = qp->sq.max_gs * sizeof (struct mthca_data_seg);
+ switch (qp->transport) {
+ case MLX:
size += 2 * sizeof (struct mthca_data_seg);
- else if (qp->transport == UD)
- size += sizeof (struct mthca_ud_seg);
- else /* bind seg is as big as atomic + raddr segs */
- size += sizeof (struct mthca_bind_seg);
+ break;
+
+ case UD:
+ size += mthca_is_memfree(dev) ?
+ sizeof (struct mthca_arbel_ud_seg) :
+ sizeof (struct mthca_tavor_ud_seg);
+ break;
+
+ case UC:
+ size += sizeof (struct mthca_raddr_seg);
+ break;
+
+ case RC:
+ size += sizeof (struct mthca_raddr_seg);
+ /*
+ * An atomic op will require an atomic segment, a
+ * remote address segment and one scatter entry.
+ */
+ size = max_t(int, size,
+ sizeof (struct mthca_atomic_seg) +
+ sizeof (struct mthca_raddr_seg) +
+ sizeof (struct mthca_data_seg));
+ break;
+
+ default:
+ break;
+ }
+
+ /* Make sure that we have enough space for a bind request */
+ size = max_t(int, size, sizeof (struct mthca_bind_seg));
+
+ size += sizeof (struct mthca_next_seg);
+
+ if (size > dev->limits.max_desc_sz)
+ return -EINVAL;
for (qp->sq.wqe_shift = 6; 1 << qp->sq.wqe_shift < size;
qp->sq.wqe_shift++)
qp->send_wqe_offset = ALIGN(qp->rq.max << qp->rq.wqe_shift,
1 << qp->sq.wqe_shift);
+
+ /*
+ * If this is a userspace QP, we don't actually have to
+ * allocate anything. All we need is to calculate the WQE
+ * sizes and the send_wqe_offset, so we're done now.
+ */
+ if (pd->ibpd.uobject)
+ return 0;
+
size = PAGE_ALIGN(qp->send_wqe_offset +
(qp->sq.max << qp->sq.wqe_shift));
if (!qp->wrid)
goto err_out;
- if (size <= MTHCA_MAX_DIRECT_QP_SIZE) {
- qp->is_direct = 1;
- npages = 1;
- shift = get_order(size) + PAGE_SHIFT;
+ err = mthca_buf_alloc(dev, size, MTHCA_MAX_DIRECT_QP_SIZE,
+ &qp->queue, &qp->is_direct, pd, 0, &qp->mr);
+ if (err)
+ goto err_out;
- if (0)
- mthca_dbg(dev, "Creating direct QP of size %d (shift %d)\n",
- size, shift);
+ return 0;
- qp->queue.direct.buf = pci_alloc_consistent(dev->pdev, size, &t);
- if (!qp->queue.direct.buf)
- goto err_out;
+err_out:
+ kfree(qp->wrid);
+ return err;
+}
- pci_unmap_addr_set(&qp->queue.direct, mapping, t);
+static void mthca_free_wqe_buf(struct mthca_dev *dev,
+ struct mthca_qp *qp)
+{
+ mthca_buf_free(dev, PAGE_ALIGN(qp->send_wqe_offset +
+ (qp->sq.max << qp->sq.wqe_shift)),
+ &qp->queue, qp->is_direct, &qp->mr);
+ kfree(qp->wrid);
+}
- memset(qp->queue.direct.buf, 0, size);
+static int mthca_map_memfree(struct mthca_dev *dev,
+ struct mthca_qp *qp)
+{
+ int ret;
- while (t & ((1 << shift) - 1)) {
- --shift;
- npages *= 2;
- }
+ if (mthca_is_memfree(dev)) {
+ ret = mthca_table_get(dev, dev->qp_table.qp_table, qp->qpn);
+ if (ret)
+ return ret;
- dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
- if (!dma_list)
- goto err_out_free;
+ ret = mthca_table_get(dev, dev->qp_table.eqp_table, qp->qpn);
+ if (ret)
+ goto err_qpc;
- for (i = 0; i < npages; ++i)
- dma_list[i] = t + i * (1 << shift);
- } else {
- qp->is_direct = 0;
- npages = size / PAGE_SIZE;
- shift = PAGE_SHIFT;
+ ret = mthca_table_get(dev, dev->qp_table.rdb_table,
+ qp->qpn << dev->qp_table.rdb_shift);
+ if (ret)
+ goto err_eqpc;
- if (0)
- mthca_dbg(dev, "Creating indirect QP with %d pages\n", npages);
+ }
- dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
- if (!dma_list)
- goto err_out;
+ return 0;
- qp->queue.page_list = kmalloc(npages *
- sizeof *qp->queue.page_list,
- GFP_KERNEL);
- if (!qp->queue.page_list)
- goto err_out;
+err_eqpc:
+ mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn);
- for (i = 0; i < npages; ++i) {
- qp->queue.page_list[i].buf =
- pci_alloc_consistent(dev->pdev, PAGE_SIZE, &t);
- if (!qp->queue.page_list[i].buf)
- goto err_out_free;
+err_qpc:
+ mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn);
- memset(qp->queue.page_list[i].buf, 0, PAGE_SIZE);
+ return ret;
+}
- pci_unmap_addr_set(&qp->queue.page_list[i], mapping, t);
- dma_list[i] = t;
- }
- }
-
- err = mthca_mr_alloc_phys(dev, pd->pd_num, dma_list, shift,
- npages, 0, size,
- MTHCA_MPT_FLAG_LOCAL_WRITE |
- MTHCA_MPT_FLAG_LOCAL_READ,
- &qp->mr);
- if (err)
- goto err_out_free;
-
- kfree(dma_list);
- return 0;
+static void mthca_unmap_memfree(struct mthca_dev *dev,
+ struct mthca_qp *qp)
+{
+ mthca_table_put(dev, dev->qp_table.rdb_table,
+ qp->qpn << dev->qp_table.rdb_shift);
+ mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn);
+ mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn);
+}
- err_out_free:
- if (qp->is_direct) {
- pci_free_consistent(dev->pdev, size,
- qp->queue.direct.buf,
- pci_unmap_addr(&qp->queue.direct, mapping));
- } else
- for (i = 0; i < npages; ++i) {
- if (qp->queue.page_list[i].buf)
- pci_free_consistent(dev->pdev, PAGE_SIZE,
- qp->queue.page_list[i].buf,
- pci_unmap_addr(&qp->queue.page_list[i],
- mapping));
+static int mthca_alloc_memfree(struct mthca_dev *dev,
+ struct mthca_qp *qp)
+{
+ int ret = 0;
+
+ if (mthca_is_memfree(dev)) {
+ qp->rq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_RQ,
+ qp->qpn, &qp->rq.db);
+ if (qp->rq.db_index < 0)
+ return ret;
+
+ qp->sq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_SQ,
+ qp->qpn, &qp->sq.db);
+ if (qp->sq.db_index < 0)
+ mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index);
+ }
- }
+ return ret;
+}
- err_out:
- kfree(qp->wrid);
- kfree(dma_list);
- return err;
+static void mthca_free_memfree(struct mthca_dev *dev,
+ struct mthca_qp *qp)
+{
+ if (mthca_is_memfree(dev)) {
+ mthca_free_db(dev, MTHCA_DB_TYPE_SQ, qp->sq.db_index);
+ mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index);
+ }
}
static int mthca_alloc_qp_common(struct mthca_dev *dev,
struct mthca_cq *send_cq,
struct mthca_cq *recv_cq,
enum ib_sig_type send_policy,
- enum ib_sig_type recv_policy,
struct mthca_qp *qp)
{
- int err;
+ int ret;
+ int i;
- spin_lock_init(&qp->lock);
- atomic_set(&qp->refcount, 1);
+ qp->refcount = 1;
+ init_waitqueue_head(&qp->wait);
+ mutex_init(&qp->mutex);
qp->state = IB_QPS_RESET;
qp->atomic_rd_en = 0;
qp->resp_depth = 0;
- qp->sq.policy = send_policy;
- qp->rq.policy = recv_policy;
- qp->rq.cur = 0;
- qp->sq.cur = 0;
- qp->rq.next = 0;
- qp->sq.next = 0;
- qp->rq.last_comp = qp->rq.max - 1;
- qp->sq.last_comp = qp->sq.max - 1;
- qp->rq.last = NULL;
- qp->sq.last = NULL;
-
- err = mthca_alloc_wqe_buf(dev, pd, qp);
- return err;
+ qp->sq_policy = send_policy;
+ mthca_wq_reset(&qp->sq);
+ mthca_wq_reset(&qp->rq);
+
+ spin_lock_init(&qp->sq.lock);
+ spin_lock_init(&qp->rq.lock);
+
+ ret = mthca_map_memfree(dev, qp);
+ if (ret)
+ return ret;
+
+ ret = mthca_alloc_wqe_buf(dev, pd, qp);
+ if (ret) {
+ mthca_unmap_memfree(dev, qp);
+ return ret;
+ }
+
+ mthca_adjust_qp_caps(dev, pd, qp);
+
+ /*
+ * If this is a userspace QP, we're done now. The doorbells
+ * will be allocated and buffers will be initialized in
+ * userspace.
+ */
+ if (pd->ibpd.uobject)
+ return 0;
+
+ ret = mthca_alloc_memfree(dev, qp);
+ if (ret) {
+ mthca_free_wqe_buf(dev, qp);
+ mthca_unmap_memfree(dev, qp);
+ return ret;
+ }
+
+ if (mthca_is_memfree(dev)) {
+ struct mthca_next_seg *next;
+ struct mthca_data_seg *scatter;
+ int size = (sizeof (struct mthca_next_seg) +
+ qp->rq.max_gs * sizeof (struct mthca_data_seg)) / 16;
+
+ for (i = 0; i < qp->rq.max; ++i) {
+ next = get_recv_wqe(qp, i);
+ next->nda_op = cpu_to_be32(((i + 1) & (qp->rq.max - 1)) <<
+ qp->rq.wqe_shift);
+ next->ee_nds = cpu_to_be32(size);
+
+ for (scatter = (void *) (next + 1);
+ (void *) scatter < (void *) next + (1 << qp->rq.wqe_shift);
+ ++scatter)
+ scatter->lkey = cpu_to_be32(MTHCA_INVAL_LKEY);
+ }
+
+ for (i = 0; i < qp->sq.max; ++i) {
+ next = get_send_wqe(qp, i);
+ next->nda_op = cpu_to_be32((((i + 1) & (qp->sq.max - 1)) <<
+ qp->sq.wqe_shift) +
+ qp->send_wqe_offset);
+ }
+ }
+
+ qp->sq.last = get_send_wqe(qp, qp->sq.max - 1);
+ qp->rq.last = get_recv_wqe(qp, qp->rq.max - 1);
+
+ return 0;
+}
+
+static int mthca_set_qp_size(struct mthca_dev *dev, struct ib_qp_cap *cap,
+ struct mthca_pd *pd, struct mthca_qp *qp)
+{
+ int max_data_size = mthca_max_data_size(dev, qp, dev->limits.max_desc_sz);
+
+ /* Sanity check QP size before proceeding */
+ if (cap->max_send_wr > dev->limits.max_wqes ||
+ cap->max_recv_wr > dev->limits.max_wqes ||
+ cap->max_send_sge > dev->limits.max_sg ||
+ cap->max_recv_sge > dev->limits.max_sg ||
+ cap->max_inline_data > mthca_max_inline_data(pd, max_data_size))
+ return -EINVAL;
+
+ /*
+ * For MLX transport we need 2 extra S/G entries:
+ * one for the header and one for the checksum at the end
+ */
+ if (qp->transport == MLX && cap->max_recv_sge + 2 > dev->limits.max_sg)
+ return -EINVAL;
+
+ if (mthca_is_memfree(dev)) {
+ qp->rq.max = cap->max_recv_wr ?
+ roundup_pow_of_two(cap->max_recv_wr) : 0;
+ qp->sq.max = cap->max_send_wr ?
+ roundup_pow_of_two(cap->max_send_wr) : 0;
+ } else {
+ qp->rq.max = cap->max_recv_wr;
+ qp->sq.max = cap->max_send_wr;
+ }
+
+ qp->rq.max_gs = cap->max_recv_sge;
+ qp->sq.max_gs = max_t(int, cap->max_send_sge,
+ ALIGN(cap->max_inline_data + MTHCA_INLINE_HEADER_SIZE,
+ MTHCA_INLINE_CHUNK_SIZE) /
+ sizeof (struct mthca_data_seg));
+
+ return 0;
}
int mthca_alloc_qp(struct mthca_dev *dev,
struct mthca_cq *recv_cq,
enum ib_qp_type type,
enum ib_sig_type send_policy,
- enum ib_sig_type recv_policy,
+ struct ib_qp_cap *cap,
struct mthca_qp *qp)
{
int err;
default: return -EINVAL;
}
+ err = mthca_set_qp_size(dev, cap, pd, qp);
+ if (err)
+ return err;
+
qp->qpn = mthca_alloc(&dev->qp_table.alloc);
if (qp->qpn == -1)
return -ENOMEM;
+ /* initialize port to zero for error-catching. */
+ qp->port = 0;
+
err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq,
- send_policy, recv_policy, qp);
+ send_policy, qp);
if (err) {
mthca_free(&dev->qp_table.alloc, qp->qpn);
return err;
return 0;
}
+static void mthca_lock_cqs(struct mthca_cq *send_cq, struct mthca_cq *recv_cq)
+{
+ if (send_cq == recv_cq)
+ spin_lock_irq(&send_cq->lock);
+ else if (send_cq->cqn < recv_cq->cqn) {
+ spin_lock_irq(&send_cq->lock);
+ spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
+ } else {
+ spin_lock_irq(&recv_cq->lock);
+ spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
+ }
+}
+
+static void mthca_unlock_cqs(struct mthca_cq *send_cq, struct mthca_cq *recv_cq)
+{
+ if (send_cq == recv_cq)
+ spin_unlock_irq(&send_cq->lock);
+ else if (send_cq->cqn < recv_cq->cqn) {
+ spin_unlock(&recv_cq->lock);
+ spin_unlock_irq(&send_cq->lock);
+ } else {
+ spin_unlock(&send_cq->lock);
+ spin_unlock_irq(&recv_cq->lock);
+ }
+}
+
int mthca_alloc_sqp(struct mthca_dev *dev,
struct mthca_pd *pd,
struct mthca_cq *send_cq,
struct mthca_cq *recv_cq,
enum ib_sig_type send_policy,
- enum ib_sig_type recv_policy,
+ struct ib_qp_cap *cap,
int qpn,
int port,
struct mthca_sqp *sqp)
{
- int err = 0;
u32 mqpn = qpn * 2 + dev->qp_table.sqp_start + port - 1;
+ int err;
+
+ sqp->qp.transport = MLX;
+ err = mthca_set_qp_size(dev, cap, pd, &sqp->qp);
+ if (err)
+ return err;
sqp->header_buf_size = sqp->qp.sq.max * MTHCA_UD_HEADER_SIZE;
sqp->header_buf = dma_alloc_coherent(&dev->pdev->dev, sqp->header_buf_size,
if (err)
goto err_out;
- sqp->port = port;
+ sqp->qp.port = port;
sqp->qp.qpn = mqpn;
sqp->qp.transport = MLX;
err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq,
- send_policy, recv_policy,
- &sqp->qp);
+ send_policy, &sqp->qp);
if (err)
goto err_out_free;
return 0;
err_out_free:
- spin_lock_irq(&dev->qp_table.lock);
+ /*
+ * Lock CQs here, so that CQ polling code can do QP lookup
+ * without taking a lock.
+ */
+ mthca_lock_cqs(send_cq, recv_cq);
+
+ spin_lock(&dev->qp_table.lock);
mthca_array_clear(&dev->qp_table.qp, mqpn);
- spin_unlock_irq(&dev->qp_table.lock);
+ spin_unlock(&dev->qp_table.lock);
+
+ mthca_unlock_cqs(send_cq, recv_cq);
err_out:
dma_free_coherent(&dev->pdev->dev, sqp->header_buf_size,
return err;
}
+static inline int get_qp_refcount(struct mthca_dev *dev, struct mthca_qp *qp)
+{
+ int c;
+
+ spin_lock_irq(&dev->qp_table.lock);
+ c = qp->refcount;
+ spin_unlock_irq(&dev->qp_table.lock);
+
+ return c;
+}
+
void mthca_free_qp(struct mthca_dev *dev,
struct mthca_qp *qp)
{
u8 status;
- int size;
- int i;
+ struct mthca_cq *send_cq;
+ struct mthca_cq *recv_cq;
- spin_lock_irq(&dev->qp_table.lock);
- mthca_array_clear(&dev->qp_table.qp,
- qp->qpn & (dev->limits.num_qps - 1));
- spin_unlock_irq(&dev->qp_table.lock);
+ send_cq = to_mcq(qp->ibqp.send_cq);
+ recv_cq = to_mcq(qp->ibqp.recv_cq);
- atomic_dec(&qp->refcount);
- wait_event(qp->wait, !atomic_read(&qp->refcount));
+ /*
+ * Lock CQs here, so that CQ polling code can do QP lookup
+ * without taking a lock.
+ */
+ mthca_lock_cqs(send_cq, recv_cq);
- if (qp->state != IB_QPS_RESET)
- mthca_MODIFY_QP(dev, MTHCA_TRANS_ANY2RST, qp->qpn, 0, NULL, 0, &status);
+ spin_lock(&dev->qp_table.lock);
+ mthca_array_clear(&dev->qp_table.qp,
+ qp->qpn & (dev->limits.num_qps - 1));
+ --qp->refcount;
+ spin_unlock(&dev->qp_table.lock);
- mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq)->cqn, qp->qpn);
- if (qp->ibqp.send_cq != qp->ibqp.recv_cq)
- mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq)->cqn, qp->qpn);
+ mthca_unlock_cqs(send_cq, recv_cq);
- mthca_free_mr(dev, &qp->mr);
+ wait_event(qp->wait, !get_qp_refcount(dev, qp));
- size = PAGE_ALIGN(qp->send_wqe_offset +
- (qp->sq.max << qp->sq.wqe_shift));
+ if (qp->state != IB_QPS_RESET)
+ mthca_MODIFY_QP(dev, qp->state, IB_QPS_RESET, qp->qpn, 0,
+ NULL, 0, &status);
- if (qp->is_direct) {
- pci_free_consistent(dev->pdev, size,
- qp->queue.direct.buf,
- pci_unmap_addr(&qp->queue.direct, mapping));
- } else {
- for (i = 0; i < size / PAGE_SIZE; ++i) {
- pci_free_consistent(dev->pdev, PAGE_SIZE,
- qp->queue.page_list[i].buf,
- pci_unmap_addr(&qp->queue.page_list[i],
- mapping));
- }
+ /*
+ * If this is a userspace QP, the buffers, MR, CQs and so on
+ * will be cleaned up in userspace, so all we have to do is
+ * unref the mem-free tables and free the QPN in our table.
+ */
+ if (!qp->ibqp.uobject) {
+ mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq), qp->qpn,
+ qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
+ if (qp->ibqp.send_cq != qp->ibqp.recv_cq)
+ mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq), qp->qpn,
+ qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
+
+ mthca_free_memfree(dev, qp);
+ mthca_free_wqe_buf(dev, qp);
}
- kfree(qp->wrid);
+ mthca_unmap_memfree(dev, qp);
if (is_sqp(dev, qp)) {
atomic_dec(&(to_mpd(qp->ibqp.pd)->sqp_count));
to_msqp(qp)->header_buf_size,
to_msqp(qp)->header_buf,
to_msqp(qp)->header_dma);
- }
- else
+ } else
mthca_free(&dev->qp_table.alloc, qp->qpn);
}
{
int header_size;
int err;
+ u16 pkey;
ib_ud_header_init(256, /* assume a MAD */
- sqp->ud_header.grh_present,
+ mthca_ah_grh_present(to_mah(wr->wr.ud.ah)),
&sqp->ud_header);
err = mthca_read_ah(dev, to_mah(wr->wr.ud.ah), &sqp->ud_header);
return err;
mlx->flags &= ~cpu_to_be32(MTHCA_NEXT_SOLICIT | 1);
mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MTHCA_MLX_VL15 : 0) |
- (sqp->ud_header.lrh.destination_lid == 0xffff ?
- MTHCA_MLX_SLR : 0) |
+ (sqp->ud_header.lrh.destination_lid ==
+ IB_LID_PERMISSIVE ? MTHCA_MLX_SLR : 0) |
(sqp->ud_header.lrh.service_level << 8));
mlx->rlid = sqp->ud_header.lrh.destination_lid;
mlx->vcrc = 0;
}
sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
- if (sqp->ud_header.lrh.destination_lid == 0xffff)
- sqp->ud_header.lrh.source_lid = 0xffff;
+ if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
+ sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
if (!sqp->qp.ibqp.qp_num)
- ib_get_cached_pkey(&dev->ib_dev, sqp->port,
- sqp->pkey_index,
- &sqp->ud_header.bth.pkey);
+ ib_get_cached_pkey(&dev->ib_dev, sqp->qp.port,
+ sqp->pkey_index, &pkey);
else
- ib_get_cached_pkey(&dev->ib_dev, sqp->port,
- wr->wr.ud.pkey_index,
- &sqp->ud_header.bth.pkey);
- cpu_to_be16s(&sqp->ud_header.bth.pkey);
+ ib_get_cached_pkey(&dev->ib_dev, sqp->qp.port,
+ wr->wr.ud.pkey_index, &pkey);
+ sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
return 0;
}
-int mthca_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
- struct ib_send_wr **bad_wr)
+static inline int mthca_wq_overflow(struct mthca_wq *wq, int nreq,
+ struct ib_cq *ib_cq)
+{
+ unsigned cur;
+ struct mthca_cq *cq;
+
+ cur = wq->head - wq->tail;
+ if (likely(cur + nreq < wq->max))
+ return 0;
+
+ cq = to_mcq(ib_cq);
+ spin_lock(&cq->lock);
+ cur = wq->head - wq->tail;
+ spin_unlock(&cq->lock);
+
+ return cur + nreq >= wq->max;
+}
+
+int mthca_tavor_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+ struct ib_send_wr **bad_wr)
{
struct mthca_dev *dev = to_mdev(ibqp->device);
struct mthca_qp *qp = to_mqp(ibqp);
int i;
int size;
int size0 = 0;
- u32 f0 = 0;
+ u32 f0;
int ind;
u8 op0 = 0;
- static const u8 opcode[] = {
- [IB_WR_SEND] = MTHCA_OPCODE_SEND,
- [IB_WR_SEND_WITH_IMM] = MTHCA_OPCODE_SEND_IMM,
- [IB_WR_RDMA_WRITE] = MTHCA_OPCODE_RDMA_WRITE,
- [IB_WR_RDMA_WRITE_WITH_IMM] = MTHCA_OPCODE_RDMA_WRITE_IMM,
- [IB_WR_RDMA_READ] = MTHCA_OPCODE_RDMA_READ,
- [IB_WR_ATOMIC_CMP_AND_SWP] = MTHCA_OPCODE_ATOMIC_CS,
- [IB_WR_ATOMIC_FETCH_AND_ADD] = MTHCA_OPCODE_ATOMIC_FA,
- };
-
- spin_lock_irqsave(&qp->lock, flags);
+ spin_lock_irqsave(&qp->sq.lock, flags);
/* XXX check that state is OK to post send */
- ind = qp->sq.next;
+ ind = qp->sq.next_ind;
for (nreq = 0; wr; ++nreq, wr = wr->next) {
- if (qp->sq.cur + nreq >= qp->sq.max) {
- mthca_err(dev, "SQ full (%d posted, %d max, %d nreq)\n",
- qp->sq.cur, qp->sq.max, nreq);
+ if (mthca_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
+ mthca_err(dev, "SQ %06x full (%u head, %u tail,"
+ " %d max, %d nreq)\n", qp->qpn,
+ qp->sq.head, qp->sq.tail,
+ qp->sq.max, nreq);
err = -ENOMEM;
*bad_wr = wr;
goto out;
cpu_to_be32(1);
if (wr->opcode == IB_WR_SEND_WITH_IMM ||
wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
- ((struct mthca_next_seg *) wqe)->flags = wr->imm_data;
+ ((struct mthca_next_seg *) wqe)->imm = wr->imm_data;
wqe += sizeof (struct mthca_next_seg);
size = sizeof (struct mthca_next_seg) / 16;
}
wqe += sizeof (struct mthca_atomic_seg);
- size += sizeof (struct mthca_raddr_seg) / 16 +
- sizeof (struct mthca_atomic_seg);
+ size += (sizeof (struct mthca_raddr_seg) +
+ sizeof (struct mthca_atomic_seg)) / 16;
break;
case IB_WR_RDMA_WRITE:
break;
+ case UC:
+ switch (wr->opcode) {
+ case IB_WR_RDMA_WRITE:
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ ((struct mthca_raddr_seg *) wqe)->raddr =
+ cpu_to_be64(wr->wr.rdma.remote_addr);
+ ((struct mthca_raddr_seg *) wqe)->rkey =
+ cpu_to_be32(wr->wr.rdma.rkey);
+ ((struct mthca_raddr_seg *) wqe)->reserved = 0;
+ wqe += sizeof (struct mthca_raddr_seg);
+ size += sizeof (struct mthca_raddr_seg) / 16;
+ break;
+
+ default:
+ /* No extra segments required for sends */
+ break;
+ }
+
+ break;
+
case UD:
- ((struct mthca_ud_seg *) wqe)->lkey =
+ ((struct mthca_tavor_ud_seg *) wqe)->lkey =
cpu_to_be32(to_mah(wr->wr.ud.ah)->key);
- ((struct mthca_ud_seg *) wqe)->av_addr =
+ ((struct mthca_tavor_ud_seg *) wqe)->av_addr =
cpu_to_be64(to_mah(wr->wr.ud.ah)->avdma);
- ((struct mthca_ud_seg *) wqe)->dqpn =
+ ((struct mthca_tavor_ud_seg *) wqe)->dqpn =
cpu_to_be32(wr->wr.ud.remote_qpn);
- ((struct mthca_ud_seg *) wqe)->qkey =
+ ((struct mthca_tavor_ud_seg *) wqe)->qkey =
cpu_to_be32(wr->wr.ud.remote_qkey);
- wqe += sizeof (struct mthca_ud_seg);
- size += sizeof (struct mthca_ud_seg) / 16;
+ wqe += sizeof (struct mthca_tavor_ud_seg);
+ size += sizeof (struct mthca_tavor_ud_seg) / 16;
break;
case MLX:
qp->wrid[ind + qp->rq.max] = wr->wr_id;
- if (wr->opcode >= ARRAY_SIZE(opcode)) {
+ if (wr->opcode >= ARRAY_SIZE(mthca_opcode)) {
mthca_err(dev, "opcode invalid\n");
err = -EINVAL;
*bad_wr = wr;
goto out;
}
- if (prev_wqe) {
- ((struct mthca_next_seg *) prev_wqe)->nda_op =
- cpu_to_be32(((ind << qp->sq.wqe_shift) +
- qp->send_wqe_offset) |
- opcode[wr->opcode]);
- smp_wmb();
- ((struct mthca_next_seg *) prev_wqe)->ee_nds =
- cpu_to_be32((size0 ? 0 : MTHCA_NEXT_DBD) | size);
- }
+ ((struct mthca_next_seg *) prev_wqe)->nda_op =
+ cpu_to_be32(((ind << qp->sq.wqe_shift) +
+ qp->send_wqe_offset) |
+ mthca_opcode[wr->opcode]);
+ wmb();
+ ((struct mthca_next_seg *) prev_wqe)->ee_nds =
+ cpu_to_be32((size0 ? 0 : MTHCA_NEXT_DBD) | size |
+ ((wr->send_flags & IB_SEND_FENCE) ?
+ MTHCA_NEXT_FENCE : 0));
if (!size0) {
size0 = size;
- op0 = opcode[wr->opcode];
+ op0 = mthca_opcode[wr->opcode];
+ f0 = wr->send_flags & IB_SEND_FENCE ?
+ MTHCA_SEND_DOORBELL_FENCE : 0;
}
++ind;
}
out:
- if (nreq) {
- u32 doorbell[2];
+ if (likely(nreq)) {
+ __be32 doorbell[2];
- doorbell[0] = cpu_to_be32(((qp->sq.next << qp->sq.wqe_shift) +
+ doorbell[0] = cpu_to_be32(((qp->sq.next_ind << qp->sq.wqe_shift) +
qp->send_wqe_offset) | f0 | op0);
doorbell[1] = cpu_to_be32((qp->qpn << 8) | size0);
mthca_write64(doorbell,
dev->kar + MTHCA_SEND_DOORBELL,
MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+ /*
+ * Make sure doorbells don't leak out of SQ spinlock
+ * and reach the HCA out of order:
+ */
+ mmiowb();
}
- qp->sq.cur += nreq;
- qp->sq.next = ind;
+ qp->sq.next_ind = ind;
+ qp->sq.head += nreq;
- spin_unlock_irqrestore(&qp->lock, flags);
+ spin_unlock_irqrestore(&qp->sq.lock, flags);
return err;
}
-int mthca_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
- struct ib_recv_wr **bad_wr)
+int mthca_tavor_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
{
struct mthca_dev *dev = to_mdev(ibqp->device);
struct mthca_qp *qp = to_mqp(ibqp);
+ __be32 doorbell[2];
unsigned long flags;
int err = 0;
int nreq;
void *wqe;
void *prev_wqe;
- spin_lock_irqsave(&qp->lock, flags);
+ spin_lock_irqsave(&qp->rq.lock, flags);
/* XXX check that state is OK to post receive */
- ind = qp->rq.next;
+ ind = qp->rq.next_ind;
- for (nreq = 0; wr; ++nreq, wr = wr->next) {
- if (qp->rq.cur + nreq >= qp->rq.max) {
- mthca_err(dev, "RQ %06x full\n", qp->qpn);
+ for (nreq = 0; wr; wr = wr->next) {
+ if (mthca_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
+ mthca_err(dev, "RQ %06x full (%u head, %u tail,"
+ " %d max, %d nreq)\n", qp->qpn,
+ qp->rq.head, qp->rq.tail,
+ qp->rq.max, nreq);
err = -ENOMEM;
*bad_wr = wr;
goto out;
((struct mthca_next_seg *) wqe)->nda_op = 0;
((struct mthca_next_seg *) wqe)->ee_nds =
cpu_to_be32(MTHCA_NEXT_DBD);
- ((struct mthca_next_seg *) wqe)->flags =
- (wr->recv_flags & IB_RECV_SIGNALED) ?
- cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0;
+ ((struct mthca_next_seg *) wqe)->flags = 0;
wqe += sizeof (struct mthca_next_seg);
size = sizeof (struct mthca_next_seg) / 16;
- if (wr->num_sge > qp->rq.max_gs) {
+ if (unlikely(wr->num_sge > qp->rq.max_gs)) {
err = -EINVAL;
*bad_wr = wr;
goto out;
qp->wrid[ind] = wr->wr_id;
- if (prev_wqe) {
- ((struct mthca_next_seg *) prev_wqe)->nda_op =
- cpu_to_be32((ind << qp->rq.wqe_shift) | 1);
- smp_wmb();
- ((struct mthca_next_seg *) prev_wqe)->ee_nds =
- cpu_to_be32(MTHCA_NEXT_DBD | size);
- }
+ ((struct mthca_next_seg *) prev_wqe)->nda_op =
+ cpu_to_be32((ind << qp->rq.wqe_shift) | 1);
+ wmb();
+ ((struct mthca_next_seg *) prev_wqe)->ee_nds =
+ cpu_to_be32(MTHCA_NEXT_DBD | size);
if (!size0)
size0 = size;
++ind;
if (unlikely(ind >= qp->rq.max))
ind -= qp->rq.max;
+
+ ++nreq;
+ if (unlikely(nreq == MTHCA_TAVOR_MAX_WQES_PER_RECV_DB)) {
+ nreq = 0;
+
+ doorbell[0] = cpu_to_be32((qp->rq.next_ind << qp->rq.wqe_shift) | size0);
+ doorbell[1] = cpu_to_be32(qp->qpn << 8);
+
+ wmb();
+
+ mthca_write64(doorbell,
+ dev->kar + MTHCA_RECEIVE_DOORBELL,
+ MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+
+ qp->rq.head += MTHCA_TAVOR_MAX_WQES_PER_RECV_DB;
+ size0 = 0;
+ }
}
out:
- if (nreq) {
- u32 doorbell[2];
-
- doorbell[0] = cpu_to_be32((qp->rq.next << qp->rq.wqe_shift) | size0);
+ if (likely(nreq)) {
+ doorbell[0] = cpu_to_be32((qp->rq.next_ind << qp->rq.wqe_shift) | size0);
doorbell[1] = cpu_to_be32((qp->qpn << 8) | nreq);
wmb();
MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
}
- qp->rq.cur += nreq;
- qp->rq.next = ind;
+ qp->rq.next_ind = ind;
+ qp->rq.head += nreq;
+
+ /*
+ * Make sure doorbells don't leak out of RQ spinlock and reach
+ * the HCA out of order:
+ */
+ mmiowb();
+
+ spin_unlock_irqrestore(&qp->rq.lock, flags);
+ return err;
+}
+
+int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+ struct ib_send_wr **bad_wr)
+{
+ struct mthca_dev *dev = to_mdev(ibqp->device);
+ struct mthca_qp *qp = to_mqp(ibqp);
+ __be32 doorbell[2];
+ void *wqe;
+ void *prev_wqe;
+ unsigned long flags;
+ int err = 0;
+ int nreq;
+ int i;
+ int size;
+ int size0 = 0;
+ u32 f0;
+ int ind;
+ u8 op0 = 0;
+
+ spin_lock_irqsave(&qp->sq.lock, flags);
+
+ /* XXX check that state is OK to post send */
+
+ ind = qp->sq.head & (qp->sq.max - 1);
+
+ for (nreq = 0; wr; ++nreq, wr = wr->next) {
+ if (unlikely(nreq == MTHCA_ARBEL_MAX_WQES_PER_SEND_DB)) {
+ nreq = 0;
+
+ doorbell[0] = cpu_to_be32((MTHCA_ARBEL_MAX_WQES_PER_SEND_DB << 24) |
+ ((qp->sq.head & 0xffff) << 8) |
+ f0 | op0);
+ doorbell[1] = cpu_to_be32((qp->qpn << 8) | size0);
+
+ qp->sq.head += MTHCA_ARBEL_MAX_WQES_PER_SEND_DB;
+ size0 = 0;
+
+ /*
+ * Make sure that descriptors are written before
+ * doorbell record.
+ */
+ wmb();
+ *qp->sq.db = cpu_to_be32(qp->sq.head & 0xffff);
+
+ /*
+ * Make sure doorbell record is written before we
+ * write MMIO send doorbell.
+ */
+ wmb();
+ mthca_write64(doorbell,
+ dev->kar + MTHCA_SEND_DOORBELL,
+ MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+ }
+
+ if (mthca_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
+ mthca_err(dev, "SQ %06x full (%u head, %u tail,"
+ " %d max, %d nreq)\n", qp->qpn,
+ qp->sq.head, qp->sq.tail,
+ qp->sq.max, nreq);
+ err = -ENOMEM;
+ *bad_wr = wr;
+ goto out;
+ }
+
+ wqe = get_send_wqe(qp, ind);
+ prev_wqe = qp->sq.last;
+ qp->sq.last = wqe;
+
+ ((struct mthca_next_seg *) wqe)->flags =
+ ((wr->send_flags & IB_SEND_SIGNALED) ?
+ cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0) |
+ ((wr->send_flags & IB_SEND_SOLICITED) ?
+ cpu_to_be32(MTHCA_NEXT_SOLICIT) : 0) |
+ cpu_to_be32(1);
+ if (wr->opcode == IB_WR_SEND_WITH_IMM ||
+ wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
+ ((struct mthca_next_seg *) wqe)->imm = wr->imm_data;
+
+ wqe += sizeof (struct mthca_next_seg);
+ size = sizeof (struct mthca_next_seg) / 16;
+
+ switch (qp->transport) {
+ case RC:
+ switch (wr->opcode) {
+ case IB_WR_ATOMIC_CMP_AND_SWP:
+ case IB_WR_ATOMIC_FETCH_AND_ADD:
+ ((struct mthca_raddr_seg *) wqe)->raddr =
+ cpu_to_be64(wr->wr.atomic.remote_addr);
+ ((struct mthca_raddr_seg *) wqe)->rkey =
+ cpu_to_be32(wr->wr.atomic.rkey);
+ ((struct mthca_raddr_seg *) wqe)->reserved = 0;
+
+ wqe += sizeof (struct mthca_raddr_seg);
+
+ if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
+ ((struct mthca_atomic_seg *) wqe)->swap_add =
+ cpu_to_be64(wr->wr.atomic.swap);
+ ((struct mthca_atomic_seg *) wqe)->compare =
+ cpu_to_be64(wr->wr.atomic.compare_add);
+ } else {
+ ((struct mthca_atomic_seg *) wqe)->swap_add =
+ cpu_to_be64(wr->wr.atomic.compare_add);
+ ((struct mthca_atomic_seg *) wqe)->compare = 0;
+ }
+
+ wqe += sizeof (struct mthca_atomic_seg);
+ size += (sizeof (struct mthca_raddr_seg) +
+ sizeof (struct mthca_atomic_seg)) / 16;
+ break;
+
+ case IB_WR_RDMA_READ:
+ case IB_WR_RDMA_WRITE:
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ ((struct mthca_raddr_seg *) wqe)->raddr =
+ cpu_to_be64(wr->wr.rdma.remote_addr);
+ ((struct mthca_raddr_seg *) wqe)->rkey =
+ cpu_to_be32(wr->wr.rdma.rkey);
+ ((struct mthca_raddr_seg *) wqe)->reserved = 0;
+ wqe += sizeof (struct mthca_raddr_seg);
+ size += sizeof (struct mthca_raddr_seg) / 16;
+ break;
+
+ default:
+ /* No extra segments required for sends */
+ break;
+ }
+
+ break;
+
+ case UC:
+ switch (wr->opcode) {
+ case IB_WR_RDMA_WRITE:
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ ((struct mthca_raddr_seg *) wqe)->raddr =
+ cpu_to_be64(wr->wr.rdma.remote_addr);
+ ((struct mthca_raddr_seg *) wqe)->rkey =
+ cpu_to_be32(wr->wr.rdma.rkey);
+ ((struct mthca_raddr_seg *) wqe)->reserved = 0;
+ wqe += sizeof (struct mthca_raddr_seg);
+ size += sizeof (struct mthca_raddr_seg) / 16;
+ break;
+
+ default:
+ /* No extra segments required for sends */
+ break;
+ }
+
+ break;
+
+ case UD:
+ memcpy(((struct mthca_arbel_ud_seg *) wqe)->av,
+ to_mah(wr->wr.ud.ah)->av, MTHCA_AV_SIZE);
+ ((struct mthca_arbel_ud_seg *) wqe)->dqpn =
+ cpu_to_be32(wr->wr.ud.remote_qpn);
+ ((struct mthca_arbel_ud_seg *) wqe)->qkey =
+ cpu_to_be32(wr->wr.ud.remote_qkey);
+
+ wqe += sizeof (struct mthca_arbel_ud_seg);
+ size += sizeof (struct mthca_arbel_ud_seg) / 16;
+ break;
+
+ case MLX:
+ err = build_mlx_header(dev, to_msqp(qp), ind, wr,
+ wqe - sizeof (struct mthca_next_seg),
+ wqe);
+ if (err) {
+ *bad_wr = wr;
+ goto out;
+ }
+ wqe += sizeof (struct mthca_data_seg);
+ size += sizeof (struct mthca_data_seg) / 16;
+ break;
+ }
+
+ if (wr->num_sge > qp->sq.max_gs) {
+ mthca_err(dev, "too many gathers\n");
+ err = -EINVAL;
+ *bad_wr = wr;
+ goto out;
+ }
+
+ for (i = 0; i < wr->num_sge; ++i) {
+ ((struct mthca_data_seg *) wqe)->byte_count =
+ cpu_to_be32(wr->sg_list[i].length);
+ ((struct mthca_data_seg *) wqe)->lkey =
+ cpu_to_be32(wr->sg_list[i].lkey);
+ ((struct mthca_data_seg *) wqe)->addr =
+ cpu_to_be64(wr->sg_list[i].addr);
+ wqe += sizeof (struct mthca_data_seg);
+ size += sizeof (struct mthca_data_seg) / 16;
+ }
+
+ /* Add one more inline data segment for ICRC */
+ if (qp->transport == MLX) {
+ ((struct mthca_data_seg *) wqe)->byte_count =
+ cpu_to_be32((1 << 31) | 4);
+ ((u32 *) wqe)[1] = 0;
+ wqe += sizeof (struct mthca_data_seg);
+ size += sizeof (struct mthca_data_seg) / 16;
+ }
+
+ qp->wrid[ind + qp->rq.max] = wr->wr_id;
+
+ if (wr->opcode >= ARRAY_SIZE(mthca_opcode)) {
+ mthca_err(dev, "opcode invalid\n");
+ err = -EINVAL;
+ *bad_wr = wr;
+ goto out;
+ }
+
+ ((struct mthca_next_seg *) prev_wqe)->nda_op =
+ cpu_to_be32(((ind << qp->sq.wqe_shift) +
+ qp->send_wqe_offset) |
+ mthca_opcode[wr->opcode]);
+ wmb();
+ ((struct mthca_next_seg *) prev_wqe)->ee_nds =
+ cpu_to_be32(MTHCA_NEXT_DBD | size |
+ ((wr->send_flags & IB_SEND_FENCE) ?
+ MTHCA_NEXT_FENCE : 0));
+
+ if (!size0) {
+ size0 = size;
+ op0 = mthca_opcode[wr->opcode];
+ f0 = wr->send_flags & IB_SEND_FENCE ?
+ MTHCA_SEND_DOORBELL_FENCE : 0;
+ }
+
+ ++ind;
+ if (unlikely(ind >= qp->sq.max))
+ ind -= qp->sq.max;
+ }
+
+out:
+ if (likely(nreq)) {
+ doorbell[0] = cpu_to_be32((nreq << 24) |
+ ((qp->sq.head & 0xffff) << 8) |
+ f0 | op0);
+ doorbell[1] = cpu_to_be32((qp->qpn << 8) | size0);
+
+ qp->sq.head += nreq;
+
+ /*
+ * Make sure that descriptors are written before
+ * doorbell record.
+ */
+ wmb();
+ *qp->sq.db = cpu_to_be32(qp->sq.head & 0xffff);
+
+ /*
+ * Make sure doorbell record is written before we
+ * write MMIO send doorbell.
+ */
+ wmb();
+ mthca_write64(doorbell,
+ dev->kar + MTHCA_SEND_DOORBELL,
+ MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+ }
+
+ /*
+ * Make sure doorbells don't leak out of SQ spinlock and reach
+ * the HCA out of order:
+ */
+ mmiowb();
+
+ spin_unlock_irqrestore(&qp->sq.lock, flags);
+ return err;
+}
+
+int mthca_arbel_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ struct mthca_dev *dev = to_mdev(ibqp->device);
+ struct mthca_qp *qp = to_mqp(ibqp);
+ unsigned long flags;
+ int err = 0;
+ int nreq;
+ int ind;
+ int i;
+ void *wqe;
+
+ spin_lock_irqsave(&qp->rq.lock, flags);
+
+ /* XXX check that state is OK to post receive */
+
+ ind = qp->rq.head & (qp->rq.max - 1);
+
+ for (nreq = 0; wr; ++nreq, wr = wr->next) {
+ if (mthca_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
+ mthca_err(dev, "RQ %06x full (%u head, %u tail,"
+ " %d max, %d nreq)\n", qp->qpn,
+ qp->rq.head, qp->rq.tail,
+ qp->rq.max, nreq);
+ err = -ENOMEM;
+ *bad_wr = wr;
+ goto out;
+ }
+
+ wqe = get_recv_wqe(qp, ind);
+
+ ((struct mthca_next_seg *) wqe)->flags = 0;
+
+ wqe += sizeof (struct mthca_next_seg);
+
+ if (unlikely(wr->num_sge > qp->rq.max_gs)) {
+ err = -EINVAL;
+ *bad_wr = wr;
+ goto out;
+ }
+
+ for (i = 0; i < wr->num_sge; ++i) {
+ ((struct mthca_data_seg *) wqe)->byte_count =
+ cpu_to_be32(wr->sg_list[i].length);
+ ((struct mthca_data_seg *) wqe)->lkey =
+ cpu_to_be32(wr->sg_list[i].lkey);
+ ((struct mthca_data_seg *) wqe)->addr =
+ cpu_to_be64(wr->sg_list[i].addr);
+ wqe += sizeof (struct mthca_data_seg);
+ }
+
+ if (i < qp->rq.max_gs) {
+ ((struct mthca_data_seg *) wqe)->byte_count = 0;
+ ((struct mthca_data_seg *) wqe)->lkey = cpu_to_be32(MTHCA_INVAL_LKEY);
+ ((struct mthca_data_seg *) wqe)->addr = 0;
+ }
+
+ qp->wrid[ind] = wr->wr_id;
+
+ ++ind;
+ if (unlikely(ind >= qp->rq.max))
+ ind -= qp->rq.max;
+ }
+out:
+ if (likely(nreq)) {
+ qp->rq.head += nreq;
+
+ /*
+ * Make sure that descriptors are written before
+ * doorbell record.
+ */
+ wmb();
+ *qp->rq.db = cpu_to_be32(qp->rq.head & 0xffff);
+ }
- spin_unlock_irqrestore(&qp->lock, flags);
+ spin_unlock_irqrestore(&qp->rq.lock, flags);
return err;
}
-int mthca_free_err_wqe(struct mthca_qp *qp, int is_send,
- int index, int *dbd, u32 *new_wqe)
+void mthca_free_err_wqe(struct mthca_dev *dev, struct mthca_qp *qp, int is_send,
+ int index, int *dbd, __be32 *new_wqe)
{
struct mthca_next_seg *next;
+ /*
+ * For SRQs, all WQEs generate a CQE, so we're always at the
+ * end of the doorbell chain.
+ */
+ if (qp->ibqp.srq) {
+ *new_wqe = 0;
+ return;
+ }
+
if (is_send)
next = get_send_wqe(qp, index);
else
(next->ee_nds & cpu_to_be32(0x3f));
else
*new_wqe = 0;
-
- return 0;
}
-int __devinit mthca_init_qp_table(struct mthca_dev *dev)
+int mthca_init_qp_table(struct mthca_dev *dev)
{
int err;
u8 status;
return err;
}
-void __devexit mthca_cleanup_qp_table(struct mthca_dev *dev)
+void mthca_cleanup_qp_table(struct mthca_dev *dev)
{
int i;
u8 status;
for (i = 0; i < 2; ++i)
mthca_CONF_SPECIAL_QP(dev, i, 0, &status);
+ mthca_array_cleanup(&dev->qp_table.qp, dev->limits.num_qps);
mthca_alloc_cleanup(&dev->qp_table.alloc);
}
git://git.onelab.eu / linux-2.6.git / blobdiff