1219820Sjeff/* 2219820Sjeff * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. 3219820Sjeff * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 4219820Sjeff * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. All rights reserved. 5272027Shselasky * Copyright (c) 2005, 2006, 2007, 2008, 2014 Mellanox Technologies. All rights reserved. 6219820Sjeff * Copyright (c) 2004 Voltaire, Inc. All rights reserved. 7219820Sjeff * 8219820Sjeff * This software is available to you under a choice of one of two 9219820Sjeff * licenses. You may choose to be licensed under the terms of the GNU 10219820Sjeff * General Public License (GPL) Version 2, available from the file 11219820Sjeff * COPYING in the main directory of this source tree, or the 12219820Sjeff * OpenIB.org BSD license below: 13219820Sjeff * 14219820Sjeff * Redistribution and use in source and binary forms, with or 15219820Sjeff * without modification, are permitted provided that the following 16219820Sjeff * conditions are met: 17219820Sjeff * 18219820Sjeff * - Redistributions of source code must retain the above 19219820Sjeff * copyright notice, this list of conditions and the following 20219820Sjeff * disclaimer. 21219820Sjeff * 22219820Sjeff * - Redistributions in binary form must reproduce the above 23219820Sjeff * copyright notice, this list of conditions and the following 24219820Sjeff * disclaimer in the documentation and/or other materials 25219820Sjeff * provided with the distribution. 26219820Sjeff * 27219820Sjeff * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 28219820Sjeff * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 29219820Sjeff * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 30219820Sjeff * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 31219820Sjeff * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 32219820Sjeff * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 33219820Sjeff * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 34219820Sjeff * SOFTWARE. 35219820Sjeff */ 36219820Sjeff 37219820Sjeff#include <linux/hardirq.h> 38272027Shselasky#include <linux/module.h> 39306486Shselasky#include <dev/mlx4/cmd.h> 40306486Shselasky#include <dev/mlx4/cq.h> 41219820Sjeff 42219820Sjeff#include "mlx4.h" 43219820Sjeff#include "icm.h" 44219820Sjeff 45219820Sjeff#define MLX4_CQ_STATUS_OK ( 0 << 28) 46219820Sjeff#define MLX4_CQ_STATUS_OVERFLOW ( 9 << 28) 47219820Sjeff#define MLX4_CQ_STATUS_WRITE_FAIL (10 << 28) 48219820Sjeff#define MLX4_CQ_FLAG_CC ( 1 << 18) 49219820Sjeff#define MLX4_CQ_FLAG_OI ( 1 << 17) 50219820Sjeff#define MLX4_CQ_STATE_ARMED ( 9 << 8) 51219820Sjeff#define MLX4_CQ_STATE_ARMED_SOL ( 6 << 8) 52219820Sjeff#define MLX4_EQ_STATE_FIRED (10 << 8) 53219820Sjeff 54219820Sjeffvoid mlx4_cq_completion(struct mlx4_dev *dev, u32 cqn) 55219820Sjeff{ 56219820Sjeff struct mlx4_cq *cq; 57219820Sjeff 58219820Sjeff cq = radix_tree_lookup(&mlx4_priv(dev)->cq_table.tree, 59219820Sjeff cqn & (dev->caps.num_cqs - 1)); 60219820Sjeff if (!cq) { 61219820Sjeff mlx4_dbg(dev, "Completion event for bogus CQ %08x\n", cqn); 62219820Sjeff return; 63219820Sjeff } 64219820Sjeff 65219820Sjeff ++cq->arm_sn; 66219820Sjeff 67219820Sjeff cq->comp(cq); 68219820Sjeff} 69219820Sjeff 70219820Sjeffvoid mlx4_cq_event(struct mlx4_dev *dev, u32 cqn, int event_type) 71219820Sjeff{ 72219820Sjeff struct mlx4_cq_table *cq_table = &mlx4_priv(dev)->cq_table; 73219820Sjeff struct mlx4_cq *cq; 74219820Sjeff 75329159Shselasky spin_lock(&cq_table->lock); 76219820Sjeff 77219820Sjeff cq = radix_tree_lookup(&cq_table->tree, cqn & (dev->caps.num_cqs - 1)); 78219820Sjeff if (cq) 79219820Sjeff atomic_inc(&cq->refcount); 80219820Sjeff 81329159Shselasky spin_unlock(&cq_table->lock); 82219820Sjeff 83219820Sjeff if (!cq) { 84219820Sjeff mlx4_warn(dev, "Async event for bogus CQ %08x\n", cqn); 85219820Sjeff return; 86219820Sjeff } 87219820Sjeff 88219820Sjeff cq->event(cq, event_type); 89219820Sjeff 90219820Sjeff if (atomic_dec_and_test(&cq->refcount)) 91219820Sjeff complete(&cq->free); 92219820Sjeff} 93219820Sjeff 94219820Sjeffstatic int mlx4_SW2HW_CQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, 95219820Sjeff int cq_num) 96219820Sjeff{ 97255932Salfred return mlx4_cmd(dev, mailbox->dma, cq_num, 0, 98255932Salfred MLX4_CMD_SW2HW_CQ, MLX4_CMD_TIME_CLASS_A, 99255932Salfred MLX4_CMD_WRAPPED); 100219820Sjeff} 101219820Sjeff 102219820Sjeffstatic int mlx4_MODIFY_CQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, 103219820Sjeff int cq_num, u32 opmod) 104219820Sjeff{ 105219820Sjeff return mlx4_cmd(dev, mailbox->dma, cq_num, opmod, MLX4_CMD_MODIFY_CQ, 106255932Salfred MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 107219820Sjeff} 108219820Sjeff 109219820Sjeffstatic int mlx4_HW2SW_CQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, 110219820Sjeff int cq_num) 111219820Sjeff{ 112255932Salfred return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, 113255932Salfred cq_num, mailbox ? 0 : 1, MLX4_CMD_HW2SW_CQ, 114255932Salfred MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 115219820Sjeff} 116219820Sjeff 117219820Sjeffint mlx4_cq_modify(struct mlx4_dev *dev, struct mlx4_cq *cq, 118219820Sjeff u16 count, u16 period) 119219820Sjeff{ 120219820Sjeff struct mlx4_cmd_mailbox *mailbox; 121219820Sjeff struct mlx4_cq_context *cq_context; 122219820Sjeff int err; 123219820Sjeff 124219820Sjeff mailbox = mlx4_alloc_cmd_mailbox(dev); 125219820Sjeff if (IS_ERR(mailbox)) 126219820Sjeff return PTR_ERR(mailbox); 127219820Sjeff 128219820Sjeff cq_context = mailbox->buf; 129219820Sjeff cq_context->cq_max_count = cpu_to_be16(count); 130219820Sjeff cq_context->cq_period = cpu_to_be16(period); 131219820Sjeff 132219820Sjeff err = mlx4_MODIFY_CQ(dev, mailbox, cq->cqn, 1); 133219820Sjeff 134219820Sjeff mlx4_free_cmd_mailbox(dev, mailbox); 135219820Sjeff return err; 136219820Sjeff} 137219820SjeffEXPORT_SYMBOL_GPL(mlx4_cq_modify); 138219820Sjeff 139219820Sjeffint mlx4_cq_resize(struct mlx4_dev *dev, struct mlx4_cq *cq, 140219820Sjeff int entries, struct mlx4_mtt *mtt) 141219820Sjeff{ 142219820Sjeff struct mlx4_cmd_mailbox *mailbox; 143219820Sjeff struct mlx4_cq_context *cq_context; 144219820Sjeff u64 mtt_addr; 145219820Sjeff int err; 146219820Sjeff 147219820Sjeff mailbox = mlx4_alloc_cmd_mailbox(dev); 148219820Sjeff if (IS_ERR(mailbox)) 149219820Sjeff return PTR_ERR(mailbox); 150219820Sjeff 151219820Sjeff cq_context = mailbox->buf; 152219820Sjeff cq_context->logsize_usrpage = cpu_to_be32(ilog2(entries) << 24); 153219820Sjeff cq_context->log_page_size = mtt->page_shift - 12; 154219820Sjeff mtt_addr = mlx4_mtt_addr(dev, mtt); 155219820Sjeff cq_context->mtt_base_addr_h = mtt_addr >> 32; 156219820Sjeff cq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff); 157219820Sjeff 158219820Sjeff err = mlx4_MODIFY_CQ(dev, mailbox, cq->cqn, 0); 159219820Sjeff 160219820Sjeff mlx4_free_cmd_mailbox(dev, mailbox); 161219820Sjeff return err; 162219820Sjeff} 163219820SjeffEXPORT_SYMBOL_GPL(mlx4_cq_resize); 164219820Sjeff 165255932Salfredint __mlx4_cq_alloc_icm(struct mlx4_dev *dev, int *cqn) 166255932Salfred{ 167255932Salfred struct mlx4_priv *priv = mlx4_priv(dev); 168255932Salfred struct mlx4_cq_table *cq_table = &priv->cq_table; 169255932Salfred int err; 170255932Salfred 171255932Salfred *cqn = mlx4_bitmap_alloc(&cq_table->bitmap); 172255932Salfred if (*cqn == -1) 173255932Salfred return -ENOMEM; 174255932Salfred 175329159Shselasky err = mlx4_table_get(dev, &cq_table->table, *cqn, GFP_KERNEL); 176255932Salfred if (err) 177255932Salfred goto err_out; 178255932Salfred 179329159Shselasky err = mlx4_table_get(dev, &cq_table->cmpt_table, *cqn, GFP_KERNEL); 180255932Salfred if (err) 181255932Salfred goto err_put; 182255932Salfred return 0; 183255932Salfred 184255932Salfrederr_put: 185255932Salfred mlx4_table_put(dev, &cq_table->table, *cqn); 186255932Salfred 187255932Salfrederr_out: 188272027Shselasky mlx4_bitmap_free(&cq_table->bitmap, *cqn, MLX4_NO_RR); 189255932Salfred return err; 190255932Salfred} 191255932Salfred 192255932Salfredstatic int mlx4_cq_alloc_icm(struct mlx4_dev *dev, int *cqn) 193255932Salfred{ 194255932Salfred u64 out_param; 195255932Salfred int err; 196255932Salfred 197255932Salfred if (mlx4_is_mfunc(dev)) { 198255932Salfred err = mlx4_cmd_imm(dev, 0, &out_param, RES_CQ, 199255932Salfred RES_OP_RESERVE_AND_MAP, MLX4_CMD_ALLOC_RES, 200255932Salfred MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 201255932Salfred if (err) 202255932Salfred return err; 203255932Salfred else { 204255932Salfred *cqn = get_param_l(&out_param); 205255932Salfred return 0; 206219820Sjeff } 207219820Sjeff } 208255932Salfred return __mlx4_cq_alloc_icm(dev, cqn); 209255932Salfred} 210219820Sjeff 211255932Salfredvoid __mlx4_cq_free_icm(struct mlx4_dev *dev, int cqn) 212255932Salfred{ 213255932Salfred struct mlx4_priv *priv = mlx4_priv(dev); 214255932Salfred struct mlx4_cq_table *cq_table = &priv->cq_table; 215255932Salfred 216255932Salfred mlx4_table_put(dev, &cq_table->cmpt_table, cqn); 217255932Salfred mlx4_table_put(dev, &cq_table->table, cqn); 218272027Shselasky mlx4_bitmap_free(&cq_table->bitmap, cqn, MLX4_NO_RR); 219219820Sjeff} 220219820Sjeff 221255932Salfredstatic void mlx4_cq_free_icm(struct mlx4_dev *dev, int cqn) 222219820Sjeff{ 223255932Salfred u64 in_param = 0; 224255932Salfred int err; 225255932Salfred 226255932Salfred if (mlx4_is_mfunc(dev)) { 227255932Salfred set_param_l(&in_param, cqn); 228255932Salfred err = mlx4_cmd(dev, in_param, RES_CQ, RES_OP_RESERVE_AND_MAP, 229255932Salfred MLX4_CMD_FREE_RES, 230255932Salfred MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 231255932Salfred if (err) 232255932Salfred mlx4_warn(dev, "Failed freeing cq:%d\n", cqn); 233255932Salfred } else 234255932Salfred __mlx4_cq_free_icm(dev, cqn); 235255932Salfred} 236255932Salfred 237255932Salfredint mlx4_cq_alloc(struct mlx4_dev *dev, int nent, 238255932Salfred struct mlx4_mtt *mtt, struct mlx4_uar *uar, u64 db_rec, 239255932Salfred struct mlx4_cq *cq, unsigned vector, int collapsed, 240255932Salfred int timestamp_en) 241255932Salfred{ 242219820Sjeff struct mlx4_priv *priv = mlx4_priv(dev); 243219820Sjeff struct mlx4_cq_table *cq_table = &priv->cq_table; 244219820Sjeff struct mlx4_cmd_mailbox *mailbox; 245219820Sjeff struct mlx4_cq_context *cq_context; 246219820Sjeff u64 mtt_addr; 247219820Sjeff int err; 248219820Sjeff 249329159Shselasky if (vector >= dev->caps.num_comp_vectors) 250219820Sjeff return -EINVAL; 251219820Sjeff 252272027Shselasky cq->vector = vector; 253272027Shselasky 254255932Salfred err = mlx4_cq_alloc_icm(dev, &cq->cqn); 255272027Shselasky if (err) 256255932Salfred return err; 257219820Sjeff 258219820Sjeff spin_lock_irq(&cq_table->lock); 259219820Sjeff err = radix_tree_insert(&cq_table->tree, cq->cqn, cq); 260219820Sjeff spin_unlock_irq(&cq_table->lock); 261272027Shselasky if (err) 262255932Salfred goto err_icm; 263219820Sjeff 264219820Sjeff mailbox = mlx4_alloc_cmd_mailbox(dev); 265219820Sjeff if (IS_ERR(mailbox)) { 266219820Sjeff err = PTR_ERR(mailbox); 267219820Sjeff goto err_radix; 268219820Sjeff } 269219820Sjeff 270219820Sjeff cq_context = mailbox->buf; 271219820Sjeff cq_context->flags = cpu_to_be32(!!collapsed << 18); 272255932Salfred if (timestamp_en) 273255932Salfred cq_context->flags |= cpu_to_be32(1 << 19); 274255932Salfred 275329159Shselasky cq_context->logsize_usrpage = 276329159Shselasky cpu_to_be32((ilog2(nent) << 24) | 277329159Shselasky mlx4_to_hw_uar_index(dev, uar->index)); 278329159Shselasky cq_context->comp_eqn = priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(vector)].eqn; 279219820Sjeff cq_context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT; 280219820Sjeff 281219820Sjeff mtt_addr = mlx4_mtt_addr(dev, mtt); 282219820Sjeff cq_context->mtt_base_addr_h = mtt_addr >> 32; 283219820Sjeff cq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff); 284219820Sjeff cq_context->db_rec_addr = cpu_to_be64(db_rec); 285219820Sjeff 286219820Sjeff err = mlx4_SW2HW_CQ(dev, mailbox, cq->cqn); 287219820Sjeff mlx4_free_cmd_mailbox(dev, mailbox); 288219820Sjeff if (err) 289219820Sjeff goto err_radix; 290219820Sjeff 291219820Sjeff cq->cons_index = 0; 292219820Sjeff cq->arm_sn = 1; 293219820Sjeff cq->uar = uar; 294219820Sjeff atomic_set(&cq->refcount, 1); 295219820Sjeff init_completion(&cq->free); 296219820Sjeff 297329159Shselasky cq->irq = priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(vector)].irq; 298219820Sjeff return 0; 299219820Sjeff 300219820Sjefferr_radix: 301219820Sjeff spin_lock_irq(&cq_table->lock); 302219820Sjeff radix_tree_delete(&cq_table->tree, cq->cqn); 303219820Sjeff spin_unlock_irq(&cq_table->lock); 304219820Sjeff 305255932Salfrederr_icm: 306255932Salfred mlx4_cq_free_icm(dev, cq->cqn); 307219820Sjeff 308219820Sjeff return err; 309219820Sjeff} 310219820SjeffEXPORT_SYMBOL_GPL(mlx4_cq_alloc); 311219820Sjeff 312219820Sjeffvoid mlx4_cq_free(struct mlx4_dev *dev, struct mlx4_cq *cq) 313219820Sjeff{ 314219820Sjeff struct mlx4_priv *priv = mlx4_priv(dev); 315219820Sjeff struct mlx4_cq_table *cq_table = &priv->cq_table; 316219820Sjeff int err; 317219820Sjeff 318219820Sjeff err = mlx4_HW2SW_CQ(dev, NULL, cq->cqn); 319219820Sjeff if (err) 320219820Sjeff mlx4_warn(dev, "HW2SW_CQ failed (%d) for CQN %06x\n", err, cq->cqn); 321219820Sjeff 322329159Shselasky synchronize_irq(priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(cq->vector)].irq); 323329159Shselasky if (priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(cq->vector)].irq != 324329159Shselasky priv->eq_table.eq[MLX4_EQ_ASYNC].irq) 325329159Shselasky synchronize_irq(priv->eq_table.eq[MLX4_EQ_ASYNC].irq); 326219820Sjeff 327219820Sjeff spin_lock_irq(&cq_table->lock); 328219820Sjeff radix_tree_delete(&cq_table->tree, cq->cqn); 329219820Sjeff spin_unlock_irq(&cq_table->lock); 330219820Sjeff 331219820Sjeff if (atomic_dec_and_test(&cq->refcount)) 332219820Sjeff complete(&cq->free); 333219820Sjeff wait_for_completion(&cq->free); 334219820Sjeff 335255932Salfred mlx4_cq_free_icm(dev, cq->cqn); 336219820Sjeff} 337219820SjeffEXPORT_SYMBOL_GPL(mlx4_cq_free); 338219820Sjeff 339219820Sjeffint mlx4_init_cq_table(struct mlx4_dev *dev) 340219820Sjeff{ 341219820Sjeff struct mlx4_cq_table *cq_table = &mlx4_priv(dev)->cq_table; 342219820Sjeff int err; 343219820Sjeff 344219820Sjeff spin_lock_init(&cq_table->lock); 345219820Sjeff INIT_RADIX_TREE(&cq_table->tree, GFP_ATOMIC); 346255932Salfred if (mlx4_is_slave(dev)) 347255932Salfred return 0; 348219820Sjeff 349219820Sjeff err = mlx4_bitmap_init(&cq_table->bitmap, dev->caps.num_cqs, 350219820Sjeff dev->caps.num_cqs - 1, dev->caps.reserved_cqs, 0); 351219820Sjeff if (err) 352219820Sjeff return err; 353219820Sjeff 354219820Sjeff return 0; 355219820Sjeff} 356219820Sjeff 357219820Sjeffvoid mlx4_cleanup_cq_table(struct mlx4_dev *dev) 358219820Sjeff{ 359255932Salfred if (mlx4_is_slave(dev)) 360255932Salfred return; 361219820Sjeff /* Nothing to do to clean up radix_tree */ 362219820Sjeff mlx4_bitmap_cleanup(&mlx4_priv(dev)->cq_table.bitmap); 363219820Sjeff} 364