net/mlx5: Add XRQ support

Add support to new XRQ(eXtended shared Receive Queue)
hardware object. It supports SRQ semantics with addition
of extended receive buffers topologies and offloads.

Currently supports tag matching topology and rendezvouz offload.

Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Reviewed-by: Yossi Itigin <yosefe@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/srq.c b/drivers/net/ethernet/mellanox/mlx5/core/srq.c
index f774de6f5fcb4b88bbe0e491ca7a2e2c2fb432ea..7673da04efa4851452982f1ad50920151800b934 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/srq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/srq.c
@@ -435,16 +435,128 @@ out:
        return err;
 }
 
+static int create_xrq_cmd(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq,
+                         struct mlx5_srq_attr *in)
+{
+       u32 create_out[MLX5_ST_SZ_DW(create_xrq_out)] = {0};
+       void *create_in;
+       void *xrqc;
+       void *wq;
+       int pas_size;
+       int inlen;
+       int err;
+
+       pas_size = get_pas_size(in);
+       inlen = MLX5_ST_SZ_BYTES(create_xrq_in) + pas_size;
+       create_in = kvzalloc(inlen, GFP_KERNEL);
+       if (!create_in)
+               return -ENOMEM;
+
+       xrqc = MLX5_ADDR_OF(create_xrq_in, create_in, xrq_context);
+       wq = MLX5_ADDR_OF(xrqc, xrqc, wq);
+
+       set_wq(wq, in);
+       memcpy(MLX5_ADDR_OF(xrqc, xrqc, wq.pas), in->pas, pas_size);
+
+       if (in->type == IB_SRQT_TM) {
+               MLX5_SET(xrqc, xrqc, topology, MLX5_XRQC_TOPOLOGY_TAG_MATCHING);
+               if (in->flags & MLX5_SRQ_FLAG_RNDV)
+                       MLX5_SET(xrqc, xrqc, offload, MLX5_XRQC_OFFLOAD_RNDV);
+               MLX5_SET(xrqc, xrqc,
+                        tag_matching_topology_context.log_matching_list_sz,
+                        in->tm_log_list_size);
+       }
+       MLX5_SET(xrqc, xrqc, user_index, in->user_index);
+       MLX5_SET(xrqc, xrqc, cqn, in->cqn);
+       MLX5_SET(create_xrq_in, create_in, opcode, MLX5_CMD_OP_CREATE_XRQ);
+       err = mlx5_cmd_exec(dev, create_in, inlen, create_out,
+                           sizeof(create_out));
+       kvfree(create_in);
+       if (!err)
+               srq->srqn = MLX5_GET(create_xrq_out, create_out, xrqn);
+
+       return err;
+}
+
+static int destroy_xrq_cmd(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq)
+{
+       u32 in[MLX5_ST_SZ_DW(destroy_xrq_in)] = {0};
+       u32 out[MLX5_ST_SZ_DW(destroy_xrq_out)] = {0};
+
+       MLX5_SET(destroy_xrq_in, in, opcode, MLX5_CMD_OP_DESTROY_XRQ);
+       MLX5_SET(destroy_xrq_in, in, xrqn,   srq->srqn);
+
+       return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+}
+
+static int arm_xrq_cmd(struct mlx5_core_dev *dev,
+                      struct mlx5_core_srq *srq,
+                      u16 lwm)
+{
+       u32 out[MLX5_ST_SZ_DW(arm_rq_out)] = {0};
+       u32 in[MLX5_ST_SZ_DW(arm_rq_in)] = {0};
+
+       MLX5_SET(arm_rq_in, in, opcode,     MLX5_CMD_OP_ARM_RQ);
+       MLX5_SET(arm_rq_in, in, op_mod,     MLX5_ARM_RQ_IN_OP_MOD_XRQ);
+       MLX5_SET(arm_rq_in, in, srq_number, srq->srqn);
+       MLX5_SET(arm_rq_in, in, lwm,        lwm);
+
+       return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+}
+
+static int query_xrq_cmd(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq,
+                        struct mlx5_srq_attr *out)
+{
+       u32 in[MLX5_ST_SZ_DW(query_xrq_in)] = {0};
+       u32 *xrq_out;
+       int outlen = MLX5_ST_SZ_BYTES(query_xrq_out);
+       void *xrqc;
+       int err;
+
+       xrq_out = kvzalloc(outlen, GFP_KERNEL);
+       if (!xrq_out)
+               return -ENOMEM;
+
+       MLX5_SET(query_xrq_in, in, opcode, MLX5_CMD_OP_QUERY_XRQ);
+       MLX5_SET(query_xrq_in, in, xrqn, srq->srqn);
+
+       err = mlx5_cmd_exec(dev, in, sizeof(in), xrq_out, outlen);
+       if (err)
+               goto out;
+
+       xrqc = MLX5_ADDR_OF(query_xrq_out, xrq_out, xrq_context);
+       get_wq(MLX5_ADDR_OF(xrqc, xrqc, wq), out);
+       if (MLX5_GET(xrqc, xrqc, state) != MLX5_XRQC_STATE_GOOD)
+               out->flags |= MLX5_SRQ_FLAG_ERR;
+       out->tm_next_tag =
+               MLX5_GET(xrqc, xrqc,
+                        tag_matching_topology_context.append_next_index);
+       out->tm_hw_phase_cnt =
+               MLX5_GET(xrqc, xrqc,
+                        tag_matching_topology_context.hw_phase_cnt);
+       out->tm_sw_phase_cnt =
+               MLX5_GET(xrqc, xrqc,
+                        tag_matching_topology_context.sw_phase_cnt);
+
+out:
+       kvfree(xrq_out);
+       return err;
+}
+
 static int create_srq_split(struct mlx5_core_dev *dev,
                            struct mlx5_core_srq *srq,
                            struct mlx5_srq_attr *in)
 {
        if (!dev->issi)
                return create_srq_cmd(dev, srq, in);
-       else if (srq->common.res == MLX5_RES_XSRQ)
+       switch (srq->common.res) {
+       case MLX5_RES_XSRQ:
                return create_xrc_srq_cmd(dev, srq, in);
-       else
+       case MLX5_RES_XRQ:
+               return create_xrq_cmd(dev, srq, in);
+       default:
                return create_rmp_cmd(dev, srq, in);
+       }
 }
 
 static int destroy_srq_split(struct mlx5_core_dev *dev,
@@ -452,10 +564,14 @@ static int destroy_srq_split(struct mlx5_core_dev *dev,
 {
        if (!dev->issi)
                return destroy_srq_cmd(dev, srq);
-       else if (srq->common.res == MLX5_RES_XSRQ)
+       switch (srq->common.res) {
+       case MLX5_RES_XSRQ:
                return destroy_xrc_srq_cmd(dev, srq);
-       else
+       case MLX5_RES_XRQ:
+               return destroy_xrq_cmd(dev, srq);
+       default:
                return destroy_rmp_cmd(dev, srq);
+       }
 }
 
 int mlx5_core_create_srq(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq,
@@ -464,10 +580,16 @@ int mlx5_core_create_srq(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq,
        int err;
        struct mlx5_srq_table *table = &dev->priv.srq_table;
 
-       if (in->type == IB_SRQT_XRC)
+       switch (in->type) {
+       case IB_SRQT_XRC:
                srq->common.res = MLX5_RES_XSRQ;
-       else
+               break;
+       case IB_SRQT_TM:
+               srq->common.res = MLX5_RES_XRQ;
+               break;
+       default:
                srq->common.res = MLX5_RES_SRQ;
+       }
 
        err = create_srq_split(dev, srq, in);
        if (err)
@@ -528,10 +650,14 @@ int mlx5_core_query_srq(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq,
 {
        if (!dev->issi)
                return query_srq_cmd(dev, srq, out);
-       else if (srq->common.res == MLX5_RES_XSRQ)
+       switch (srq->common.res) {
+       case MLX5_RES_XSRQ:
                return query_xrc_srq_cmd(dev, srq, out);
-       else
+       case MLX5_RES_XRQ:
+               return query_xrq_cmd(dev, srq, out);
+       default:
                return query_rmp_cmd(dev, srq, out);
+       }
 }
 EXPORT_SYMBOL(mlx5_core_query_srq);
 
@@ -540,10 +666,14 @@ int mlx5_core_arm_srq(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq,
 {
        if (!dev->issi)
                return arm_srq_cmd(dev, srq, lwm, is_srq);
-       else if (srq->common.res == MLX5_RES_XSRQ)
+       switch (srq->common.res) {
+       case MLX5_RES_XSRQ:
                return arm_xrc_srq_cmd(dev, srq, lwm);
-       else
+       case MLX5_RES_XRQ:
+               return arm_xrq_cmd(dev, srq, lwm);
+       default:
                return arm_rmp_cmd(dev, srq, lwm);
+       }
 }
 EXPORT_SYMBOL(mlx5_core_arm_srq);
 

diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 99d88624ad0710d8e4e63a6d9d805a6a8239f988..c33e6f7a1afbef10c0f987ad0c255d9e8d83f39d 100644 (file)
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -418,6 +418,7 @@ enum mlx5_res_type {
        MLX5_RES_SQ     = MLX5_EVENT_QUEUE_TYPE_SQ,
        MLX5_RES_SRQ    = 3,
        MLX5_RES_XSRQ   = 4,
+       MLX5_RES_XRQ    = 5,
 };
 
 struct mlx5_core_rsc_common {

diff --git a/include/linux/mlx5/srq.h b/include/linux/mlx5/srq.h
index 1cde0fd53f90e026645a3d171e79653e3477980a..24ff23e27c8ab117f23d7d00c93d16535ef0a663 100644 (file)
--- a/include/linux/mlx5/srq.h
+++ b/include/linux/mlx5/srq.h
@@ -38,6 +38,7 @@
 enum {
        MLX5_SRQ_FLAG_ERR    = (1 << 0),
        MLX5_SRQ_FLAG_WQ_SIG = (1 << 1),
+       MLX5_SRQ_FLAG_RNDV   = (1 << 2),
 };
 
 struct mlx5_srq_attr {
@@ -56,6 +57,10 @@ struct mlx5_srq_attr {
        u32 user_index;
        u64 db_record;
        __be64 *pas;
+       u32 tm_log_list_size;
+       u32 tm_next_tag;
+       u32 tm_hw_phase_cnt;
+       u32 tm_sw_phase_cnt;
 };
 
 struct mlx5_core_dev;