cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/ethernet/mellanox/mlx5/core/qp.c

/*
 * Copyright (c) 2013-2015, Mellanox Technologies. 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
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */


#include <linux/gfp.h>
#include <linux/export.h>
#include <linux/mlx5/cmd.h>
#include <linux/mlx5/qp.h>
#include <linux/mlx5/driver.h>
#include <linux/mlx5/transobj.h>

#include "mlx5_core.h"


static struct mlx5_core_rsc_common *mlx5_get_rsc(struct mlx5_core_dev *dev, u32 rsn) { struct mlx5_qp_table *table = &dev->priv.qp_table; struct mlx5_core_rsc_common *common; spin_lock(&table->lock); common = radix_tree_lookup(&table->tree, rsn); if (common) atomic_inc(&common->refcount); spin_unlock(&table->lock); if (!common) { mlx5_core_warn(dev, "Async event for bogus resource 0x%x\n", rsn); return NULL; } return common; }

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void mlx5_core_put_rsc(struct mlx5_core_rsc_common *common) { if (atomic_dec_and_test(&common->refcount)) complete(&common->free); }

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static u64 qp_allowed_event_types(void) { u64 mask; mask = BIT(MLX5_EVENT_TYPE_PATH_MIG) | BIT(MLX5_EVENT_TYPE_COMM_EST) | BIT(MLX5_EVENT_TYPE_SQ_DRAINED) | BIT(MLX5_EVENT_TYPE_SRQ_LAST_WQE) | BIT(MLX5_EVENT_TYPE_WQ_CATAS_ERROR) | BIT(MLX5_EVENT_TYPE_PATH_MIG_FAILED) | BIT(MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | BIT(MLX5_EVENT_TYPE_WQ_ACCESS_ERROR); return mask; }

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static u64 rq_allowed_event_types(void) { u64 mask; mask = BIT(MLX5_EVENT_TYPE_SRQ_LAST_WQE) | BIT(MLX5_EVENT_TYPE_WQ_CATAS_ERROR); return mask; }

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static u64 sq_allowed_event_types(void) { return BIT(MLX5_EVENT_TYPE_WQ_CATAS_ERROR); }

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static bool is_event_type_allowed(int rsc_type, int event_type) { switch (rsc_type) { case MLX5_EVENT_QUEUE_TYPE_QP: return BIT(event_type) & qp_allowed_event_types(); case MLX5_EVENT_QUEUE_TYPE_RQ: return BIT(event_type) & rq_allowed_event_types(); case MLX5_EVENT_QUEUE_TYPE_SQ: return BIT(event_type) & sq_allowed_event_types(); default: WARN(1, "Event arrived for unknown resource type"); return false; } }

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void mlx5_rsc_event(struct mlx5_core_dev *dev, u32 rsn, int event_type) { struct mlx5_core_rsc_common *common = mlx5_get_rsc(dev, rsn); struct mlx5_core_qp *qp; if (!common) return; if (!is_event_type_allowed((rsn >> MLX5_USER_INDEX_LEN), event_type)) { mlx5_core_warn(dev, "event 0x%.2x is not allowed on resource 0x%.8x\n", event_type, rsn); return; } switch (common->res) { case MLX5_RES_QP: case MLX5_RES_RQ: case MLX5_RES_SQ: qp = (struct mlx5_core_qp *)common; qp->event(qp, event_type); break; default: mlx5_core_warn(dev, "invalid resource type for 0x%x\n", rsn); } mlx5_core_put_rsc(common); }

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static int create_qprqsq_common(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp, int rsc_type) { struct mlx5_qp_table *table = &dev->priv.qp_table; int err; qp->common.res = rsc_type; spin_lock_irq(&table->lock); err = radix_tree_insert(&table->tree, qp->qpn | (rsc_type << MLX5_USER_INDEX_LEN), qp); spin_unlock_irq(&table->lock); if (err) return err; atomic_set(&qp->common.refcount, 1); init_completion(&qp->common.free); qp->pid = current->pid; return 0; }

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static void destroy_qprqsq_common(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp) { struct mlx5_qp_table *table = &dev->priv.qp_table; unsigned long flags; spin_lock_irqsave(&table->lock, flags); radix_tree_delete(&table->tree, qp->qpn | (qp->common.res << MLX5_USER_INDEX_LEN)); spin_unlock_irqrestore(&table->lock, flags); mlx5_core_put_rsc((struct mlx5_core_rsc_common *)qp); wait_for_completion(&qp->common.free); }

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int mlx5_core_create_qp(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp, u32 *in, int inlen) { u32 out[MLX5_ST_SZ_DW(create_qp_out)] = {0}; u32 dout[MLX5_ST_SZ_DW(destroy_qp_out)]; u32 din[MLX5_ST_SZ_DW(destroy_qp_in)]; int err; MLX5_SET(create_qp_in, in, opcode, MLX5_CMD_OP_CREATE_QP); err = mlx5_cmd_exec(dev, in, inlen, out, sizeof(out)); if (err) return err; qp->qpn = MLX5_GET(create_qp_out, out, qpn); mlx5_core_dbg(dev, "qpn = 0x%x\n", qp->qpn); err = create_qprqsq_common(dev, qp, MLX5_RES_QP); if (err) goto err_cmd; err = mlx5_debug_qp_add(dev, qp); if (err) mlx5_core_dbg(dev, "failed adding QP 0x%x to debug file system\n", qp->qpn); atomic_inc(&dev->num_qps); return 0; err_cmd: memset(din, 0, sizeof(din)); memset(dout, 0, sizeof(dout)); MLX5_SET(destroy_qp_in, in, opcode, MLX5_CMD_OP_DESTROY_QP); MLX5_SET(destroy_qp_in, in, qpn, qp->qpn); mlx5_cmd_exec(dev, din, sizeof(din), dout, sizeof(dout)); return err; }

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Majd Dibbiny239.54%133.33%
Total241100.00%3100.00%

EXPORT_SYMBOL_GPL(mlx5_core_create_qp);
int mlx5_core_destroy_qp(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp) { u32 out[MLX5_ST_SZ_DW(destroy_qp_out)] = {0}; u32 in[MLX5_ST_SZ_DW(destroy_qp_in)] = {0}; int err; mlx5_debug_qp_remove(dev, qp); destroy_qprqsq_common(dev, qp); MLX5_SET(destroy_qp_in, in, opcode, MLX5_CMD_OP_DESTROY_QP); MLX5_SET(destroy_qp_in, in, qpn, qp->qpn); err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); if (err) return err; atomic_dec(&dev->num_qps); return 0; }

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Eli Cohen7965.29%133.33%
Saeed Mahameed3528.93%133.33%
Majd Dibbiny75.79%133.33%
Total121100.00%3100.00%

EXPORT_SYMBOL_GPL(mlx5_core_destroy_qp); struct mbox_info { u32 *in; u32 *out; int inlen; int outlen; };
static int mbox_alloc(struct mbox_info *mbox, int inlen, int outlen) { mbox->inlen = inlen; mbox->outlen = outlen; mbox->in = kzalloc(mbox->inlen, GFP_KERNEL); mbox->out = kzalloc(mbox->outlen, GFP_KERNEL); if (!mbox->in || !mbox->out) { kfree(mbox->in); kfree(mbox->out); return -ENOMEM; } return 0; }

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static void mbox_free(struct mbox_info *mbox) { kfree(mbox->in); kfree(mbox->out); }

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static int modify_qp_mbox_alloc(struct mlx5_core_dev *dev, u16 opcode, int qpn, u32 opt_param_mask, void *qpc, struct mbox_info *mbox) { mbox->out = NULL; mbox->in = NULL; #define MBOX_ALLOC(mbox, typ) \ mbox_alloc(mbox, MLX5_ST_SZ_BYTES(typ##_in), MLX5_ST_SZ_BYTES(typ##_out)) #define MOD_QP_IN_SET(typ, in, _opcode, _qpn) \ MLX5_SET(typ##_in, in, opcode, _opcode); \ MLX5_SET(typ##_in, in, qpn, _qpn) #define MOD_QP_IN_SET_QPC(typ, in, _opcode, _qpn, _opt_p, _qpc) \ MOD_QP_IN_SET(typ, in, _opcode, _qpn); \ MLX5_SET(typ##_in, in, opt_param_mask, _opt_p); \ memcpy(MLX5_ADDR_OF(typ##_in, in, qpc), _qpc, MLX5_ST_SZ_BYTES(qpc)) switch (opcode) { /* 2RST & 2ERR */ case MLX5_CMD_OP_2RST_QP: if (MBOX_ALLOC(mbox, qp_2rst)) return -ENOMEM; MOD_QP_IN_SET(qp_2rst, mbox->in, opcode, qpn); break; case MLX5_CMD_OP_2ERR_QP: if (MBOX_ALLOC(mbox, qp_2err)) return -ENOMEM; MOD_QP_IN_SET(qp_2err, mbox->in, opcode, qpn); break; /* MODIFY with QPC */ case MLX5_CMD_OP_RST2INIT_QP: if (MBOX_ALLOC(mbox, rst2init_qp)) return -ENOMEM; MOD_QP_IN_SET_QPC(rst2init_qp, mbox->in, opcode, qpn, opt_param_mask, qpc); break; case MLX5_CMD_OP_INIT2RTR_QP: if (MBOX_ALLOC(mbox, init2rtr_qp)) return -ENOMEM; MOD_QP_IN_SET_QPC(init2rtr_qp, mbox->in, opcode, qpn, opt_param_mask, qpc); break; case MLX5_CMD_OP_RTR2RTS_QP: if (MBOX_ALLOC(mbox, rtr2rts_qp)) return -ENOMEM; MOD_QP_IN_SET_QPC(rtr2rts_qp, mbox->in, opcode, qpn, opt_param_mask, qpc); break; case MLX5_CMD_OP_RTS2RTS_QP: if (MBOX_ALLOC(mbox, rts2rts_qp)) return -ENOMEM; MOD_QP_IN_SET_QPC(rts2rts_qp, mbox->in, opcode, qpn, opt_param_mask, qpc); break; case MLX5_CMD_OP_SQERR2RTS_QP: if (MBOX_ALLOC(mbox, sqerr2rts_qp)) return -ENOMEM; MOD_QP_IN_SET_QPC(sqerr2rts_qp, mbox->in, opcode, qpn, opt_param_mask, qpc); break; case MLX5_CMD_OP_INIT2INIT_QP: if (MBOX_ALLOC(mbox, init2init_qp)) return -ENOMEM; MOD_QP_IN_SET_QPC(init2init_qp, mbox->in, opcode, qpn, opt_param_mask, qpc); break; default: mlx5_core_err(dev, "Unknown transition for modify QP: OP(0x%x) QPN(0x%x)\n", opcode, qpn); return -EINVAL; } return 0; }

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int mlx5_core_qp_modify(struct mlx5_core_dev *dev, u16 opcode, u32 opt_param_mask, void *qpc, struct mlx5_core_qp *qp) { struct mbox_info mbox; int err; err = modify_qp_mbox_alloc(dev, opcode, qp->qpn, opt_param_mask, qpc, &mbox); if (err) return err; err = mlx5_cmd_exec(dev, mbox.in, mbox.inlen, mbox.out, mbox.outlen); mbox_free(&mbox); return err; }

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EXPORT_SYMBOL_GPL(mlx5_core_qp_modify);
void mlx5_init_qp_table(struct mlx5_core_dev *dev) { struct mlx5_qp_table *table = &dev->priv.qp_table; memset(table, 0, sizeof(*table)); spin_lock_init(&table->lock); INIT_RADIX_TREE(&table->tree, GFP_ATOMIC); mlx5_qp_debugfs_init(dev); }

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void mlx5_cleanup_qp_table(struct mlx5_core_dev *dev) { mlx5_qp_debugfs_cleanup(dev); }

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int mlx5_core_qp_query(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp, u32 *out, int outlen) { u32 in[MLX5_ST_SZ_DW(query_qp_in)] = {0}; MLX5_SET(query_qp_in, in, opcode, MLX5_CMD_OP_QUERY_QP); MLX5_SET(query_qp_in, in, qpn, qp->qpn); return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen); }

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EXPORT_SYMBOL_GPL(mlx5_core_qp_query);
int mlx5_core_xrcd_alloc(struct mlx5_core_dev *dev, u32 *xrcdn) { u32 out[MLX5_ST_SZ_DW(alloc_xrcd_out)] = {0}; u32 in[MLX5_ST_SZ_DW(alloc_xrcd_in)] = {0}; int err; MLX5_SET(alloc_xrcd_in, in, opcode, MLX5_CMD_OP_ALLOC_XRCD); err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); if (!err) *xrcdn = MLX5_GET(alloc_xrcd_out, out, xrcd); return err; }

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EXPORT_SYMBOL_GPL(mlx5_core_xrcd_alloc);
int mlx5_core_xrcd_dealloc(struct mlx5_core_dev *dev, u32 xrcdn) { u32 out[MLX5_ST_SZ_DW(dealloc_xrcd_out)] = {0}; u32 in[MLX5_ST_SZ_DW(dealloc_xrcd_in)] = {0}; MLX5_SET(dealloc_xrcd_in, in, opcode, MLX5_CMD_OP_DEALLOC_XRCD); MLX5_SET(dealloc_xrcd_in, in, xrcd, xrcdn); return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); }

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EXPORT_SYMBOL_GPL(mlx5_core_xrcd_dealloc);
int mlx5_core_create_rq_tracked(struct mlx5_core_dev *dev, u32 *in, int inlen, struct mlx5_core_qp *rq) { int err; u32 rqn; err = mlx5_core_create_rq(dev, in, inlen, &rqn); if (err) return err; rq->qpn = rqn; err = create_qprqsq_common(dev, rq, MLX5_RES_RQ); if (err) goto err_destroy_rq; return 0; err_destroy_rq: mlx5_core_destroy_rq(dev, rq->qpn); return err; }

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EXPORT_SYMBOL(mlx5_core_create_rq_tracked);
void mlx5_core_destroy_rq_tracked(struct mlx5_core_dev *dev, struct mlx5_core_qp *rq) { destroy_qprqsq_common(dev, rq); mlx5_core_destroy_rq(dev, rq->qpn); }

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EXPORT_SYMBOL(mlx5_core_destroy_rq_tracked);
int mlx5_core_create_sq_tracked(struct mlx5_core_dev *dev, u32 *in, int inlen, struct mlx5_core_qp *sq) { int err; u32 sqn; err = mlx5_core_create_sq(dev, in, inlen, &sqn); if (err) return err; sq->qpn = sqn; err = create_qprqsq_common(dev, sq, MLX5_RES_SQ); if (err) goto err_destroy_sq; return 0; err_destroy_sq: mlx5_core_destroy_sq(dev, sq->qpn); return err; }

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EXPORT_SYMBOL(mlx5_core_create_sq_tracked);
void mlx5_core_destroy_sq_tracked(struct mlx5_core_dev *dev, struct mlx5_core_qp *sq) { destroy_qprqsq_common(dev, sq); mlx5_core_destroy_sq(dev, sq->qpn); }

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EXPORT_SYMBOL(mlx5_core_destroy_sq_tracked);
int mlx5_core_alloc_q_counter(struct mlx5_core_dev *dev, u16 *counter_id) { u32 in[MLX5_ST_SZ_DW(alloc_q_counter_in)] = {0}; u32 out[MLX5_ST_SZ_DW(alloc_q_counter_out)] = {0}; int err; MLX5_SET(alloc_q_counter_in, in, opcode, MLX5_CMD_OP_ALLOC_Q_COUNTER); err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); if (!err) *counter_id = MLX5_GET(alloc_q_counter_out, out, counter_set_id); return err; }

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Total95100.00%3100.00%

EXPORT_SYMBOL_GPL(mlx5_core_alloc_q_counter);
int mlx5_core_dealloc_q_counter(struct mlx5_core_dev *dev, u16 counter_id) { u32 in[MLX5_ST_SZ_DW(dealloc_q_counter_in)] = {0}; u32 out[MLX5_ST_SZ_DW(dealloc_q_counter_out)] = {0}; MLX5_SET(dealloc_q_counter_in, in, opcode, MLX5_CMD_OP_DEALLOC_Q_COUNTER); MLX5_SET(dealloc_q_counter_in, in, counter_set_id, counter_id); return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); }

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Tariq Toukan7288.89%133.33%
Saeed Mahameed911.11%266.67%
Total81100.00%3100.00%

EXPORT_SYMBOL_GPL(mlx5_core_dealloc_q_counter);
int mlx5_core_query_q_counter(struct mlx5_core_dev *dev, u16 counter_id, int reset, void *out, int out_size) { u32 in[MLX5_ST_SZ_DW(query_q_counter_in)] = {0}; MLX5_SET(query_q_counter_in, in, opcode, MLX5_CMD_OP_QUERY_Q_COUNTER); MLX5_SET(query_q_counter_in, in, clear, reset); MLX5_SET(query_q_counter_in, in, counter_set_id, counter_id); return mlx5_cmd_exec(dev, in, sizeof(in), out, out_size); }

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Tariq Toukan8194.19%133.33%
Saeed Mahameed55.81%266.67%
Total86100.00%3100.00%

EXPORT_SYMBOL_GPL(mlx5_core_query_q_counter);
int mlx5_core_query_out_of_buffer(struct mlx5_core_dev *dev, u16 counter_id, u32 *out_of_buffer) { int outlen = MLX5_ST_SZ_BYTES(query_q_counter_out); void *out; int err; out = mlx5_vzalloc(outlen); if (!out) return -ENOMEM; err = mlx5_core_query_q_counter(dev, counter_id, 0, out, outlen); if (!err) *out_of_buffer = MLX5_GET(query_q_counter_out, out, out_of_buffer); kfree(out); return err; }

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Eli Cohen80231.07%220.00%
Saeed Mahameed74929.02%440.00%
Majd Dibbiny68826.66%330.00%
Tariq Toukan34213.25%110.00%
Total2581100.00%10100.00%
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