/* * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved. * Copyright (c) 2005, 2006, 2007 Cisco Systems, 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 * 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 #include #include "fw.h" #include "icm.h" enum { MLX4_COMMAND_INTERFACE_MIN_REV = 2, MLX4_COMMAND_INTERFACE_MAX_REV = 3, MLX4_COMMAND_INTERFACE_NEW_PORT_CMDS = 3, }; extern void __buggy_use_of_MLX4_GET(void); extern void __buggy_use_of_MLX4_PUT(void); static int enable_qos; module_param(enable_qos, bool, 0444); MODULE_PARM_DESC(enable_qos, "Enable Quality of Service support in the HCA (default: off)"); #define MLX4_GET(dest, source, offset) \ do { \ void *__p = (char *) (source) + (offset); \ switch (sizeof (dest)) { \ case 1: (dest) = *(u8 *) __p; break; \ case 2: (dest) = be16_to_cpup(__p); break; \ case 4: (dest) = be32_to_cpup(__p); break; \ case 8: (dest) = be64_to_cpup(__p); break; \ default: __buggy_use_of_MLX4_GET(); \ } \ } while (0) #define MLX4_PUT(dest, source, offset) \ do { \ void *__d = ((char *) (dest) + (offset)); \ switch (sizeof(source)) { \ case 1: *(u8 *) __d = (source); break; \ case 2: *(__be16 *) __d = cpu_to_be16(source); break; \ case 4: *(__be32 *) __d = cpu_to_be32(source); break; \ case 8: *(__be64 *) __d = cpu_to_be64(source); break; \ default: __buggy_use_of_MLX4_PUT(); \ } \ } while (0) static void dump_dev_cap_flags(struct mlx4_dev *dev, u32 flags) { static const char *fname[] = { [ 0] = "RC transport", [ 1] = "UC transport", [ 2] = "UD transport", [ 3] = "XRC transport", [ 4] = "reliable multicast", [ 5] = "FCoIB support", [ 6] = "SRQ support", [ 7] = "IPoIB checksum offload", [ 8] = "P_Key violation counter", [ 9] = "Q_Key violation counter", [10] = "VMM", [12] = "DPDP", [15] = "Big LSO headers", [16] = "MW support", [17] = "APM support", [18] = "Atomic ops support", [19] = "Raw multicast support", [20] = "Address vector port checking support", [21] = "UD multicast support", [24] = "Demand paging support", [25] = "Router support", [30] = "IBoE support" }; int i; mlx4_dbg(dev, "DEV_CAP flags:\n"); for (i = 0; i < ARRAY_SIZE(fname); ++i) if (fname[i] && (flags & (1 << i))) mlx4_dbg(dev, " %s\n", fname[i]); } int mlx4_MOD_STAT_CFG(struct mlx4_dev *dev, struct mlx4_mod_stat_cfg *cfg) { struct mlx4_cmd_mailbox *mailbox; u32 *inbox; int err = 0; #define MOD_STAT_CFG_IN_SIZE 0x100 #define MOD_STAT_CFG_PG_SZ_M_OFFSET 0x002 #define MOD_STAT_CFG_PG_SZ_OFFSET 0x003 mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); inbox = mailbox->buf; memset(inbox, 0, MOD_STAT_CFG_IN_SIZE); MLX4_PUT(inbox, cfg->log_pg_sz, MOD_STAT_CFG_PG_SZ_OFFSET); MLX4_PUT(inbox, cfg->log_pg_sz_m, MOD_STAT_CFG_PG_SZ_M_OFFSET); err = mlx4_cmd(dev, mailbox->dma, 0, 0, MLX4_CMD_MOD_STAT_CFG, MLX4_CMD_TIME_CLASS_A); mlx4_free_cmd_mailbox(dev, mailbox); return err; } int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap) { struct mlx4_cmd_mailbox *mailbox; u32 *outbox; u8 field; u32 field32; u16 size; u16 stat_rate; int err; int i; #define QUERY_DEV_CAP_OUT_SIZE 0x100 #define QUERY_DEV_CAP_MAX_SRQ_SZ_OFFSET 0x10 #define QUERY_DEV_CAP_MAX_QP_SZ_OFFSET 0x11 #define QUERY_DEV_CAP_RSVD_QP_OFFSET 0x12 #define QUERY_DEV_CAP_MAX_QP_OFFSET 0x13 #define QUERY_DEV_CAP_RSVD_SRQ_OFFSET 0x14 #define QUERY_DEV_CAP_MAX_SRQ_OFFSET 0x15 #define QUERY_DEV_CAP_RSVD_EEC_OFFSET 0x16 #define QUERY_DEV_CAP_MAX_EEC_OFFSET 0x17 #define QUERY_DEV_CAP_MAX_CQ_SZ_OFFSET 0x19 #define QUERY_DEV_CAP_RSVD_CQ_OFFSET 0x1a #define QUERY_DEV_CAP_MAX_CQ_OFFSET 0x1b #define QUERY_DEV_CAP_MAX_MPT_OFFSET 0x1d #define QUERY_DEV_CAP_RSVD_EQ_OFFSET 0x1e #define QUERY_DEV_CAP_MAX_EQ_OFFSET 0x1f #define QUERY_DEV_CAP_RSVD_MTT_OFFSET 0x20 #define QUERY_DEV_CAP_MAX_MRW_SZ_OFFSET 0x21 #define QUERY_DEV_CAP_RSVD_MRW_OFFSET 0x22 #define QUERY_DEV_CAP_MAX_MTT_SEG_OFFSET 0x23 #define QUERY_DEV_CAP_MAX_AV_OFFSET 0x27 #define QUERY_DEV_CAP_MAX_REQ_QP_OFFSET 0x29 #define QUERY_DEV_CAP_MAX_RES_QP_OFFSET 0x2b #define QUERY_DEV_CAP_MAX_GSO_OFFSET 0x2d #define QUERY_DEV_CAP_MAX_RDMA_OFFSET 0x2f #define QUERY_DEV_CAP_RSZ_SRQ_OFFSET 0x33 #define QUERY_DEV_CAP_ACK_DELAY_OFFSET 0x35 #define QUERY_DEV_CAP_MTU_WIDTH_OFFSET 0x36 #define QUERY_DEV_CAP_VL_PORT_OFFSET 0x37 #define QUERY_DEV_CAP_MAX_MSG_SZ_OFFSET 0x38 #define QUERY_DEV_CAP_MAX_GID_OFFSET 0x3b #define QUERY_DEV_CAP_RATE_SUPPORT_OFFSET 0x3c #define QUERY_DEV_CAP_MAX_PKEY_OFFSET 0x3f #define QUERY_DEV_CAP_UDP_RSS_OFFSET 0x42 #define QUERY_DEV_CAP_ETH_UC_LOOPBACK_OFFSET 0x43 #define QUERY_DEV_CAP_FLAGS_OFFSET 0x44 #define QUERY_DEV_CAP_RSVD_UAR_OFFSET 0x48 #define QUERY_DEV_CAP_UAR_SZ_OFFSET 0x49 #define QUERY_DEV_CAP_PAGE_SZ_OFFSET 0x4b #define QUERY_DEV_CAP_BF_OFFSET 0x4c #define QUERY_DEV_CAP_LOG_BF_REG_SZ_OFFSET 0x4d #define QUERY_DEV_CAP_LOG_MAX_BF_REGS_PER_PAGE_OFFSET 0x4e #define QUERY_DEV_CAP_LOG_MAX_BF_PAGES_OFFSET 0x4f #define QUERY_DEV_CAP_MAX_SG_SQ_OFFSET 0x51 #define QUERY_DEV_CAP_MAX_DESC_SZ_SQ_OFFSET 0x52 #define QUERY_DEV_CAP_MAX_SG_RQ_OFFSET 0x55 #define QUERY_DEV_CAP_MAX_DESC_SZ_RQ_OFFSET 0x56 #define QUERY_DEV_CAP_MAX_QP_MCG_OFFSET 0x61 #define QUERY_DEV_CAP_RSVD_MCG_OFFSET 0x62 #define QUERY_DEV_CAP_MAX_MCG_OFFSET 0x63 #define QUERY_DEV_CAP_RSVD_PD_OFFSET 0x64 #define QUERY_DEV_CAP_MAX_PD_OFFSET 0x65 #define QUERY_DEV_CAP_RDMARC_ENTRY_SZ_OFFSET 0x80 #define QUERY_DEV_CAP_QPC_ENTRY_SZ_OFFSET 0x82 #define QUERY_DEV_CAP_AUX_ENTRY_SZ_OFFSET 0x84 #define QUERY_DEV_CAP_ALTC_ENTRY_SZ_OFFSET 0x86 #define QUERY_DEV_CAP_EQC_ENTRY_SZ_OFFSET 0x88 #define QUERY_DEV_CAP_CQC_ENTRY_SZ_OFFSET 0x8a #define QUERY_DEV_CAP_SRQ_ENTRY_SZ_OFFSET 0x8c #define QUERY_DEV_CAP_C_MPT_ENTRY_SZ_OFFSET 0x8e #define QUERY_DEV_CAP_MTT_ENTRY_SZ_OFFSET 0x90 #define QUERY_DEV_CAP_D_MPT_ENTRY_SZ_OFFSET 0x92 #define QUERY_DEV_CAP_BMME_FLAGS_OFFSET 0x94 #define QUERY_DEV_CAP_RSVD_LKEY_OFFSET 0x98 #define QUERY_DEV_CAP_MAX_ICM_SZ_OFFSET 0xa0 mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); outbox = mailbox->buf; err = mlx4_cmd_box(dev, 0, mailbox->dma, 0, 0, MLX4_CMD_QUERY_DEV_CAP, MLX4_CMD_TIME_CLASS_A); if (err) goto out; MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_QP_OFFSET); dev_cap->reserved_qps = 1 << (field & 0xf); MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_QP_OFFSET); dev_cap->max_qps = 1 << (field & 0x1f); MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_SRQ_OFFSET); dev_cap->reserved_srqs = 1 << (field >> 4); MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_SRQ_OFFSET); dev_cap->max_srqs = 1 << (field & 0x1f); MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_CQ_SZ_OFFSET); dev_cap->max_cq_sz = 1 << field; MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_CQ_OFFSET); dev_cap->reserved_cqs = 1 << (field & 0xf); MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_CQ_OFFSET); dev_cap->max_cqs = 1 << (field & 0x1f); MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_MPT_OFFSET); dev_cap->max_mpts = 1 << (field & 0x3f); MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_EQ_OFFSET); dev_cap->reserved_eqs = field & 0xf; MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_EQ_OFFSET); dev_cap->max_eqs = 1 << (field & 0xf); MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_MTT_OFFSET); dev_cap->reserved_mtts = 1 << (field >> 4); MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_MRW_SZ_OFFSET); dev_cap->max_mrw_sz = 1 << field; MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_MRW_OFFSET); dev_cap->reserved_mrws = 1 << (field & 0xf); MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_MTT_SEG_OFFSET); dev_cap->max_mtt_seg = 1 << (field & 0x3f); MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_REQ_QP_OFFSET); dev_cap->max_requester_per_qp = 1 << (field & 0x3f); MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_RES_QP_OFFSET); dev_cap->max_responder_per_qp = 1 << (field & 0x3f); MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_GSO_OFFSET); field &= 0x1f; if (!field) dev_cap->max_gso_sz = 0; else dev_cap->max_gso_sz = 1 << field; MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_RDMA_OFFSET); dev_cap->max_rdma_global = 1 << (field & 0x3f); MLX4_GET(field, outbox, QUERY_DEV_CAP_ACK_DELAY_OFFSET); dev_cap->local_ca_ack_delay = field & 0x1f; MLX4_GET(field, outbox, QUERY_DEV_CAP_VL_PORT_OFFSET); dev_cap->num_ports = field & 0xf; MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_MSG_SZ_OFFSET); dev_cap->max_msg_sz = 1 << (field & 0x1f); MLX4_GET(stat_rate, outbox, QUERY_DEV_CAP_RATE_SUPPORT_OFFSET); dev_cap->stat_rate_support = stat_rate; MLX4_GET(field, outbox, QUERY_DEV_CAP_UDP_RSS_OFFSET); dev_cap->udp_rss = field & 0x1; MLX4_GET(field, outbox, QUERY_DEV_CAP_ETH_UC_LOOPBACK_OFFSET); dev_cap->loopback_support = field & 0x1; dev_cap->wol = field & 0x40; MLX4_GET(dev_cap->flags, outbox, QUERY_DEV_CAP_FLAGS_OFFSET); MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_UAR_OFFSET); dev_cap->reserved_uars = field >> 4; MLX4_GET(field, outbox, QUERY_DEV_CAP_UAR_SZ_OFFSET); dev_cap->uar_size = 1 << ((field & 0x3f) + 20); MLX4_GET(field, outbox, QUERY_DEV_CAP_PAGE_SZ_OFFSET); dev_cap->min_page_sz = 1 << field; MLX4_GET(field, outbox, QUERY_DEV_CAP_BF_OFFSET); if (field & 0x80) { MLX4_GET(field, outbox, QUERY_DEV_CAP_LOG_BF_REG_SZ_OFFSET); dev_cap->bf_reg_size = 1 << (field & 0x1f); MLX4_GET(field, outbox, QUERY_DEV_CAP_LOG_MAX_BF_REGS_PER_PAGE_OFFSET); if ((1 << (field & 0x3f)) > (PAGE_SIZE / dev_cap->bf_reg_size)) field = 3; dev_cap->bf_regs_per_page = 1 << (field & 0x3f); mlx4_dbg(dev, "BlueFlame available (reg size %d, regs/page %d)\n", dev_cap->bf_reg_size, dev_cap->bf_regs_per_page); } else { dev_cap->bf_reg_size = 0; mlx4_dbg(dev, "BlueFlame not available\n"); } MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_SG_SQ_OFFSET); dev_cap->max_sq_sg = field; MLX4_GET(size, outbox, QUERY_DEV_CAP_MAX_DESC_SZ_SQ_OFFSET); dev_cap->max_sq_desc_sz = size; MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_QP_MCG_OFFSET); dev_cap->max_qp_per_mcg = 1 << field; MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_MCG_OFFSET); dev_cap->reserved_mgms = field & 0xf; MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_MCG_OFFSET); dev_cap->max_mcgs = 1 << field; MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_PD_OFFSET); dev_cap->reserved_pds = field >> 4; MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_PD_OFFSET); dev_cap->max_pds = 1 << (field & 0x3f); MLX4_GET(size, outbox, QUERY_DEV_CAP_RDMARC_ENTRY_SZ_OFFSET); dev_cap->rdmarc_entry_sz = size; MLX4_GET(size, outbox, QUERY_DEV_CAP_QPC_ENTRY_SZ_OFFSET); dev_cap->qpc_entry_sz = size; MLX4_GET(size, outbox, QUERY_DEV_CAP_AUX_ENTRY_SZ_OFFSET); dev_cap->aux_entry_sz = size; MLX4_GET(size, outbox, QUERY_DEV_CAP_ALTC_ENTRY_SZ_OFFSET); dev_cap->altc_entry_sz = size; MLX4_GET(size, outbox, QUERY_DEV_CAP_EQC_ENTRY_SZ_OFFSET); dev_cap->eqc_entry_sz = size; MLX4_GET(size, outbox, QUERY_DEV_CAP_CQC_ENTRY_SZ_OFFSET); dev_cap->cqc_entry_sz = size; MLX4_GET(size, outbox, QUERY_DEV_CAP_SRQ_ENTRY_SZ_OFFSET); dev_cap->srq_entry_sz = size; MLX4_GET(size, outbox, QUERY_DEV_CAP_C_MPT_ENTRY_SZ_OFFSET); dev_cap->cmpt_entry_sz = size; MLX4_GET(size, outbox, QUERY_DEV_CAP_MTT_ENTRY_SZ_OFFSET); dev_cap->mtt_entry_sz = size; MLX4_GET(size, outbox, QUERY_DEV_CAP_D_MPT_ENTRY_SZ_OFFSET); dev_cap->dmpt_entry_sz = size; MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_SRQ_SZ_OFFSET); dev_cap->max_srq_sz = 1 << field; MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_QP_SZ_OFFSET); dev_cap->max_qp_sz = 1 << field; MLX4_GET(field, outbox, QUERY_DEV_CAP_RSZ_SRQ_OFFSET); dev_cap->resize_srq = field & 1; MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_SG_RQ_OFFSET); dev_cap->max_rq_sg = field; MLX4_GET(size, outbox, QUERY_DEV_CAP_MAX_DESC_SZ_RQ_OFFSET); dev_cap->max_rq_desc_sz = size; MLX4_GET(dev_cap->bmme_flags, outbox, QUERY_DEV_CAP_BMME_FLAGS_OFFSET); MLX4_GET(dev_cap->reserved_lkey, outbox, QUERY_DEV_CAP_RSVD_LKEY_OFFSET); MLX4_GET(dev_cap->max_icm_sz, outbox, QUERY_DEV_CAP_MAX_ICM_SZ_OFFSET); if (dev->flags & MLX4_FLAG_OLD_PORT_CMDS) { for (i = 1; i <= dev_cap->num_ports; ++i) { MLX4_GET(field, outbox, QUERY_DEV_CAP_VL_PORT_OFFSET); dev_cap->max_vl[i] = field >> 4; MLX4_GET(field, outbox, QUERY_DEV_CAP_MTU_WIDTH_OFFSET); dev_cap->ib_mtu[i] = field >> 4; dev_cap->max_port_width[i] = field & 0xf; MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_GID_OFFSET); dev_cap->max_gids[i] = 1 << (field & 0xf); MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_PKEY_OFFSET); dev_cap->max_pkeys[i] = 1 << (field & 0xf); } } else { #define QUERY_PORT_SUPPORTED_TYPE_OFFSET 0x00 #define QUERY_PORT_MTU_OFFSET 0x01 #define QUERY_PORT_ETH_MTU_OFFSET 0x02 #define QUERY_PORT_WIDTH_OFFSET 0x06 #define QUERY_PORT_MAX_GID_PKEY_OFFSET 0x07 #define QUERY_PORT_MAX_MACVLAN_OFFSET 0x0a #define QUERY_PORT_MAX_VL_OFFSET 0x0b #define QUERY_PORT_MAC_OFFSET 0x10 #define QUERY_PORT_TRANS_VENDOR_OFFSET 0x18 #define QUERY_PORT_WAVELENGTH_OFFSET 0x1c #define QUERY_PORT_TRANS_CODE_OFFSET 0x20 for (i = 1; i <= dev_cap->num_ports; ++i) { err = mlx4_cmd_box(dev, 0, mailbox->dma, i, 0, MLX4_CMD_QUERY_PORT, MLX4_CMD_TIME_CLASS_B); if (err) goto out; MLX4_GET(field, outbox, QUERY_PORT_SUPPORTED_TYPE_OFFSET); dev_cap->supported_port_types[i] = field & 3; MLX4_GET(field, outbox, QUERY_PORT_MTU_OFFSET); dev_cap->ib_mtu[i] = field & 0xf; MLX4_GET(field, outbox, QUERY_PORT_WIDTH_OFFSET); dev_cap->max_port_width[i] = field & 0xf; MLX4_GET(field, outbox, QUERY_PORT_MAX_GID_PKEY_OFFSET); dev_cap->max_gids[i] = 1 << (field >> 4); dev_cap->max_pkeys[i] = 1 << (field & 0xf); MLX4_GET(field, outbox, QUERY_PORT_MAX_VL_OFFSET); dev_cap->max_vl[i] = field & 0xf; MLX4_GET(field, outbox, QUERY_PORT_MAX_MACVLAN_OFFSET); dev_cap->log_max_macs[i] = field & 0xf; dev_cap->log_max_vlans[i] = field >> 4; MLX4_GET(dev_cap->eth_mtu[i], outbox, QUERY_PORT_ETH_MTU_OFFSET); MLX4_GET(dev_cap->def_mac[i], outbox, QUERY_PORT_MAC_OFFSET); MLX4_GET(field32, outbox, QUERY_PORT_TRANS_VENDOR_OFFSET); dev_cap->trans_type[i] = field32 >> 24; dev_cap->vendor_oui[i] = field32 & 0xffffff; MLX4_GET(dev_cap->wavelength[i], outbox, QUERY_PORT_WAVELENGTH_OFFSET); MLX4_GET(dev_cap->trans_code[i], outbox, QUERY_PORT_TRANS_CODE_OFFSET); } } mlx4_dbg(dev, "Base MM extensions: flags %08x, rsvd L_Key %08x\n", dev_cap->bmme_flags, dev_cap->reserved_lkey); /* * Each UAR has 4 EQ doorbells; so if a UAR is reserved, then * we can't use any EQs whose doorbell falls on that page, * even if the EQ itself isn't reserved. */ dev_cap->reserved_eqs = max(dev_cap->reserved_uars * 4, dev_cap->reserved_eqs); mlx4_dbg(dev, "Max ICM size %lld MB\n", (unsigned long long) dev_cap->max_icm_sz >> 20); mlx4_dbg(dev, "Max QPs: %d, reserved QPs: %d, entry size: %d\n", dev_cap->max_qps, dev_cap->reserved_qps, dev_cap->qpc_entry_sz); mlx4_dbg(dev, "Max SRQs: %d, reserved SRQs: %d, entry size: %d\n", dev_cap->max_srqs, dev_cap->reserved_srqs, dev_cap->srq_entry_sz); mlx4_dbg(dev, "Max CQs: %d, reserved CQs: %d, entry size: %d\n", dev_cap->max_cqs, dev_cap->reserved_cqs, dev_cap->cqc_entry_sz); mlx4_dbg(dev, "Max EQs: %d, reserved EQs: %d, entry size: %d\n", dev_cap->max_eqs, dev_cap->reserved_eqs, dev_cap->eqc_entry_sz); mlx4_dbg(dev, "reserved MPTs: %d, reserved MTTs: %d\n", dev_cap->reserved_mrws, dev_cap->reserved_mtts); mlx4_dbg(dev, "Max PDs: %d, reserved PDs: %d, reserved UARs: %d\n", dev_cap->max_pds, dev_cap->reserved_pds, dev_cap->reserved_uars); mlx4_dbg(dev, "Max QP/MCG: %d, reserved MGMs: %d\n", dev_cap->max_pds, dev_cap->reserved_mgms); mlx4_dbg(dev, "Max CQEs: %d, max WQEs: %d, max SRQ WQEs: %d\n", dev_cap->max_cq_sz, dev_cap->max_qp_sz, dev_cap->max_srq_sz); mlx4_dbg(dev, "Local CA ACK delay: %d, max MTU: %d, port width cap: %d\n", dev_cap->local_ca_ack_delay, 128 << dev_cap->ib_mtu[1], dev_cap->max_port_width[1]); mlx4_dbg(dev, "Max SQ desc size: %d, max SQ S/G: %d\n", dev_cap->max_sq_desc_sz, dev_cap->max_sq_sg); mlx4_dbg(dev, "Max RQ desc size: %d, max RQ S/G: %d\n", dev_cap->max_rq_desc_sz, dev_cap->max_rq_sg); mlx4_dbg(dev, "Max GSO size: %d\n", dev_cap->max_gso_sz); dump_dev_cap_flags(dev, dev_cap->flags); out: mlx4_free_cmd_mailbox(dev, mailbox); return err; } int mlx4_map_cmd(struct mlx4_dev *dev, u16 op, struct mlx4_icm *icm, u64 virt) { struct mlx4_cmd_mailbox *mailbox; struct mlx4_icm_iter iter; __be64 *pages; int lg; int nent = 0; int i; int err = 0; int ts = 0, tc = 0; mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); memset(mailbox->buf, 0, MLX4_MAILBOX_SIZE); pages = mailbox->buf; for (mlx4_icm_first(icm, &iter); !mlx4_icm_last(&iter); mlx4_icm_next(&iter)) { /* * We have to pass pages that are aligned to their * size, so find the least significant 1 in the * address or size and use that as our log2 size. */ lg = ffs(mlx4_icm_addr(&iter) | mlx4_icm_size(&iter)) - 1; if (lg < MLX4_ICM_PAGE_SHIFT) { mlx4_warn(dev, "Got FW area not aligned to %d (%llx/%lx).\n", MLX4_ICM_PAGE_SIZE, (unsigned long long) mlx4_icm_addr(&iter), mlx4_icm_size(&iter)); err = -EINVAL; goto out; } for (i = 0; i < mlx4_icm_size(&iter) >> lg; ++i) { if (virt != -1) { pages[nent * 2] = cpu_to_be64(virt); virt += 1 << lg; } pages[nent * 2 + 1] = cpu_to_be64((mlx4_icm_addr(&iter) + (i << lg)) | (lg - MLX4_ICM_PAGE_SHIFT)); ts += 1 << (lg - 10); ++tc; if (++nent == MLX4_MAILBOX_SIZE / 16) { err = mlx4_cmd(dev, mailbox->dma, nent, 0, op, MLX4_CMD_TIME_CLASS_B); if (err) goto out; nent = 0; } } } if (nent) err = mlx4_cmd(dev, mailbox->dma, nent, 0, op, MLX4_CMD_TIME_CLASS_B); if (err) goto out; switch (op) { case MLX4_CMD_MAP_FA: mlx4_dbg(dev, "Mapped %d chunks/%d KB for FW.\n", tc, ts); break; case MLX4_CMD_MAP_ICM_AUX: mlx4_dbg(dev, "Mapped %d chunks/%d KB for ICM aux.\n", tc, ts); break; case MLX4_CMD_MAP_ICM: mlx4_dbg(dev, "Mapped %d chunks/%d KB at %llx for ICM.\n", tc, ts, (unsigned long long) virt - (ts << 10)); break; } out: mlx4_free_cmd_mailbox(dev, mailbox); return err; } int mlx4_MAP_FA(struct mlx4_dev *dev, struct mlx4_icm *icm) { return mlx4_map_cmd(dev, MLX4_CMD_MAP_FA, icm, -1); } int mlx4_UNMAP_FA(struct mlx4_dev *dev) { return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_UNMAP_FA, MLX4_CMD_TIME_CLASS_B); } int mlx4_RUN_FW(struct mlx4_dev *dev) { return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_RUN_FW, MLX4_CMD_TIME_CLASS_A); } int mlx4_QUERY_FW(struct mlx4_dev *dev) { struct mlx4_fw *fw = &mlx4_priv(dev)->fw; struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd; struct mlx4_cmd_mailbox *mailbox; u32 *outbox; int err = 0; u64 fw_ver; u16 cmd_if_rev; u8 lg; #define QUERY_FW_OUT_SIZE 0x100 #define QUERY_FW_VER_OFFSET 0x00 #define QUERY_FW_CMD_IF_REV_OFFSET 0x0a #define QUERY_FW_MAX_CMD_OFFSET 0x0f #define QUERY_FW_ERR_START_OFFSET 0x30 #define QUERY_FW_ERR_SIZE_OFFSET 0x38 #define QUERY_FW_ERR_BAR_OFFSET 0x3c #define QUERY_FW_SIZE_OFFSET 0x00 #define QUERY_FW_CLR_INT_BASE_OFFSET 0x20 #define QUERY_FW_CLR_INT_BAR_OFFSET 0x28 mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); outbox = mailbox->buf; err = mlx4_cmd_box(dev, 0, mailbox->dma, 0, 0, MLX4_CMD_QUERY_FW, MLX4_CMD_TIME_CLASS_A); if (err) goto out; MLX4_GET(fw_ver, outbox, QUERY_FW_VER_OFFSET); /* * FW subminor version is at more significant bits than minor * version, so swap here. */ dev->caps.fw_ver = (fw_ver & 0xffff00000000ull) | ((fw_ver & 0xffff0000ull) >> 16) | ((fw_ver & 0x0000ffffull) << 16); MLX4_GET(cmd_if_rev, outbox, QUERY_FW_CMD_IF_REV_OFFSET); if (cmd_if_rev < MLX4_COMMAND_INTERFACE_MIN_REV || cmd_if_rev > MLX4_COMMAND_INTERFACE_MAX_REV) { mlx4_err(dev, "Installed FW has unsupported " "command interface revision %d.\n", cmd_if_rev); mlx4_err(dev, "(Installed FW version is %d.%d.%03d)\n", (int) (dev->caps.fw_ver >> 32), (int) (dev->caps.fw_ver >> 16) & 0xffff, (int) dev->caps.fw_ver & 0xffff); mlx4_err(dev, "This driver version supports only revisions %d to %d.\n", MLX4_COMMAND_INTERFACE_MIN_REV, MLX4_COMMAND_INTERFACE_MAX_REV); err = -ENODEV; goto out; } if (cmd_if_rev < MLX4_COMMAND_INTERFACE_NEW_PORT_CMDS) dev->flags |= MLX4_FLAG_OLD_PORT_CMDS; MLX4_GET(lg, outbox, QUERY_FW_MAX_CMD_OFFSET); cmd->max_cmds = 1 << lg; mlx4_dbg(dev, "FW version %d.%d.%03d (cmd intf rev %d), max commands %d\n", (int) (dev->caps.fw_ver >> 32), (int) (dev->caps.fw_ver >> 16) & 0xffff, (int) dev->caps.fw_ver & 0xffff, cmd_if_rev, cmd->max_cmds); MLX4_GET(fw->catas_offset, outbox, QUERY_FW_ERR_START_OFFSET); MLX4_GET(fw->catas_size, outbox, QUERY_FW_ERR_SIZE_OFFSET); MLX4_GET(fw->catas_bar, outbox, QUERY_FW_ERR_BAR_OFFSET); fw->catas_bar = (fw->catas_bar >> 6) * 2; mlx4_dbg(dev, "Catastrophic error buffer at 0x%llx, size 0x%x, BAR %d\n", (unsigned long long) fw->catas_offset, fw->catas_size, fw->catas_bar); MLX4_GET(fw->fw_pages, outbox, QUERY_FW_SIZE_OFFSET); MLX4_GET(fw->clr_int_base, outbox, QUERY_FW_CLR_INT_BASE_OFFSET); MLX4_GET(fw->clr_int_bar, outbox, QUERY_FW_CLR_INT_BAR_OFFSET); fw->clr_int_bar = (fw->clr_int_bar >> 6) * 2; mlx4_dbg(dev, "FW size %d KB\n", fw->fw_pages >> 2); /* * Round up number of system pages needed in case * MLX4_ICM_PAGE_SIZE < PAGE_SIZE. */ fw->fw_pages = ALIGN(fw->fw_pages, PAGE_SIZE / MLX4_ICM_PAGE_SIZE) >> (PAGE_SHIFT - MLX4_ICM_PAGE_SHIFT); mlx4_dbg(dev, "Clear int @ %llx, BAR %d\n", (unsigned long long) fw->clr_int_base, fw->clr_int_bar); out: mlx4_free_cmd_mailbox(dev, mailbox); return err; } static void get_board_id(void *vsd, char *board_id) { int i; #define VSD_OFFSET_SIG1 0x00 #define VSD_OFFSET_SIG2 0xde #define VSD_OFFSET_MLX_BOARD_ID 0xd0 #define VSD_OFFSET_TS_BOARD_ID 0x20 #define VSD_SIGNATURE_TOPSPIN 0x5ad memset(board_id, 0, MLX4_BOARD_ID_LEN); if (be16_to_cpup(vsd + VSD_OFFSET_SIG1) == VSD_SIGNATURE_TOPSPIN && be16_to_cpup(vsd + VSD_OFFSET_SIG2) == VSD_SIGNATURE_TOPSPIN) { strlcpy(board_id, vsd + VSD_OFFSET_TS_BOARD_ID, MLX4_BOARD_ID_LEN); } else { /* * The board ID is a string but the firmware byte * swaps each 4-byte word before passing it back to * us. Therefore we need to swab it before printing. */ for (i = 0; i < 4; ++i) ((u32 *) board_id)[i] = swab32(*(u32 *) (vsd + VSD_OFFSET_MLX_BOARD_ID + i * 4)); } } int mlx4_QUERY_ADAPTER(struct mlx4_dev *dev, struct mlx4_adapter *adapter) { struct mlx4_cmd_mailbox *mailbox; u32 *outbox; int err; #define QUERY_ADAPTER_OUT_SIZE 0x100 #define QUERY_ADAPTER_INTA_PIN_OFFSET 0x10 #define QUERY_ADAPTER_VSD_OFFSET 0x20 mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); outbox = mailbox->buf; err = mlx4_cmd_box(dev, 0, mailbox->dma, 0, 0, MLX4_CMD_QUERY_ADAPTER, MLX4_CMD_TIME_CLASS_A); if (err) goto out; MLX4_GET(adapter->inta_pin, outbox, QUERY_ADAPTER_INTA_PIN_OFFSET); get_board_id(outbox + QUERY_ADAPTER_VSD_OFFSET / 4, adapter->board_id); out: mlx4_free_cmd_mailbox(dev, mailbox); return err; } int mlx4_INIT_HCA(struct mlx4_dev *dev, struct mlx4_init_hca_param *param) { struct mlx4_cmd_mailbox *mailbox; __be32 *inbox; int err; #define INIT_HCA_IN_SIZE 0x200 #define INIT_HCA_VERSION_OFFSET 0x000 #define INIT_HCA_VERSION 2 #define INIT_HCA_CACHELINE_SZ_OFFSET 0x0e #define INIT_HCA_FLAGS_OFFSET 0x014 #define INIT_HCA_QPC_OFFSET 0x020 #define INIT_HCA_QPC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x10) #define INIT_HCA_LOG_QP_OFFSET (INIT_HCA_QPC_OFFSET + 0x17) #define INIT_HCA_SRQC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x28) #define INIT_HCA_LOG_SRQ_OFFSET (INIT_HCA_QPC_OFFSET + 0x2f) #define INIT_HCA_CQC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x30) #define INIT_HCA_LOG_CQ_OFFSET (INIT_HCA_QPC_OFFSET + 0x37) #define INIT_HCA_ALTC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x40) #define INIT_HCA_AUXC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x50) #define INIT_HCA_EQC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x60) #define INIT_HCA_LOG_EQ_OFFSET (INIT_HCA_QPC_OFFSET + 0x67) #define INIT_HCA_RDMARC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x70) #define INIT_HCA_LOG_RD_OFFSET (INIT_HCA_QPC_OFFSET + 0x77) #define INIT_HCA_MCAST_OFFSET 0x0c0 #define INIT_HCA_MC_BASE_OFFSET (INIT_HCA_MCAST_OFFSET + 0x00) #define INIT_HCA_LOG_MC_ENTRY_SZ_OFFSET (INIT_HCA_MCAST_OFFSET + 0x12) #define INIT_HCA_LOG_MC_HASH_SZ_OFFSET (INIT_HCA_MCAST_OFFSET + 0x16) #define INIT_HCA_LOG_MC_TABLE_SZ_OFFSET (INIT_HCA_MCAST_OFFSET + 0x1b) #define INIT_HCA_TPT_OFFSET 0x0f0 #define INIT_HCA_DMPT_BASE_OFFSET (INIT_HCA_TPT_OFFSET + 0x00) #define INIT_HCA_LOG_MPT_SZ_OFFSET (INIT_HCA_TPT_OFFSET + 0x0b) #define INIT_HCA_MTT_BASE_OFFSET (INIT_HCA_TPT_OFFSET + 0x10) #define INIT_HCA_CMPT_BASE_OFFSET (INIT_HCA_TPT_OFFSET + 0x18) #define INIT_HCA_UAR_OFFSET 0x120 #define INIT_HCA_LOG_UAR_SZ_OFFSET (INIT_HCA_UAR_OFFSET + 0x0a) #define INIT_HCA_UAR_PAGE_SZ_OFFSET (INIT_HCA_UAR_OFFSET + 0x0b) mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); inbox = mailbox->buf; memset(inbox, 0, INIT_HCA_IN_SIZE); *((u8 *) mailbox->buf + INIT_HCA_VERSION_OFFSET) = INIT_HCA_VERSION; *((u8 *) mailbox->buf + INIT_HCA_CACHELINE_SZ_OFFSET) = (ilog2(cache_line_size()) - 4) << 5; #if defined(__LITTLE_ENDIAN) *(inbox + INIT_HCA_FLAGS_OFFSET / 4) &= ~cpu_to_be32(1 << 1); #elif defined(__BIG_ENDIAN) *(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1 << 1); #else #error Host endianness not defined #endif /* Check port for UD address vector: */ *(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1); /* Enable IPoIB checksumming if we can: */ if (dev->caps.flags & MLX4_DEV_CAP_FLAG_IPOIB_CSUM) *(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1 << 3); /* Enable QoS support if module parameter set */ if (enable_qos) *(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1 << 2); /* QPC/EEC/CQC/EQC/RDMARC attributes */ MLX4_PUT(inbox, param->qpc_base, INIT_HCA_QPC_BASE_OFFSET); MLX4_PUT(inbox, param->log_num_qps, INIT_HCA_LOG_QP_OFFSET); MLX4_PUT(inbox, param->srqc_base, INIT_HCA_SRQC_BASE_OFFSET); MLX4_PUT(inbox, param->log_num_srqs, INIT_HCA_LOG_SRQ_OFFSET); MLX4_PUT(inbox, param->cqc_base, INIT_HCA_CQC_BASE_OFFSET); MLX4_PUT(inbox, param->log_num_cqs, INIT_HCA_LOG_CQ_OFFSET); MLX4_PUT(inbox, param->altc_base, INIT_HCA_ALTC_BASE_OFFSET); MLX4_PUT(inbox, param->auxc_base, INIT_HCA_AUXC_BASE_OFFSET); MLX4_PUT(inbox, param->eqc_base, INIT_HCA_EQC_BASE_OFFSET); MLX4_PUT(inbox, param->log_num_eqs, INIT_HCA_LOG_EQ_OFFSET); MLX4_PUT(inbox, param->rdmarc_base, INIT_HCA_RDMARC_BASE_OFFSET); MLX4_PUT(inbox, param->log_rd_per_qp, INIT_HCA_LOG_RD_OFFSET); /* multicast attributes */ MLX4_PUT(inbox, param->mc_base, INIT_HCA_MC_BASE_OFFSET); MLX4_PUT(inbox, param->log_mc_entry_sz, INIT_HCA_LOG_MC_ENTRY_SZ_OFFSET); MLX4_PUT(inbox, param->log_mc_hash_sz, INIT_HCA_LOG_MC_HASH_SZ_OFFSET); MLX4_PUT(inbox, param->log_mc_table_sz, INIT_HCA_LOG_MC_TABLE_SZ_OFFSET); /* TPT attributes */ MLX4_PUT(inbox, param->dmpt_base, INIT_HCA_DMPT_BASE_OFFSET); MLX4_PUT(inbox, param->log_mpt_sz, INIT_HCA_LOG_MPT_SZ_OFFSET); MLX4_PUT(inbox, param->mtt_base, INIT_HCA_MTT_BASE_OFFSET); MLX4_PUT(inbox, param->cmpt_base, INIT_HCA_CMPT_BASE_OFFSET); /* UAR attributes */ MLX4_PUT(inbox, (u8) (PAGE_SHIFT - 12), INIT_HCA_UAR_PAGE_SZ_OFFSET); MLX4_PUT(inbox, param->log_uar_sz, INIT_HCA_LOG_UAR_SZ_OFFSET); err = mlx4_cmd(dev, mailbox->dma, 0, 0, MLX4_CMD_INIT_HCA, 10000); if (err) mlx4_err(dev, "INIT_HCA returns %d\n", err); mlx4_free_cmd_mailbox(dev, mailbox); return err; } int mlx4_INIT_PORT(struct mlx4_dev *dev, int port) { struct mlx4_cmd_mailbox *mailbox; u32 *inbox; int err; u32 flags; u16 field; if (dev->flags & MLX4_FLAG_OLD_PORT_CMDS) { #define INIT_PORT_IN_SIZE 256 #define INIT_PORT_FLAGS_OFFSET 0x00 #define INIT_PORT_FLAG_SIG (1 << 18) #define INIT_PORT_FLAG_NG (1 << 17) #define INIT_PORT_FLAG_G0 (1 << 16) #define INIT_PORT_VL_SHIFT 4 #define INIT_PORT_PORT_WIDTH_SHIFT 8 #define INIT_PORT_MTU_OFFSET 0x04 #define INIT_PORT_MAX_GID_OFFSET 0x06 #define INIT_PORT_MAX_PKEY_OFFSET 0x0a #define INIT_PORT_GUID0_OFFSET 0x10 #define INIT_PORT_NODE_GUID_OFFSET 0x18 #define INIT_PORT_SI_GUID_OFFSET 0x20 mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); inbox = mailbox->buf; memset(inbox, 0, INIT_PORT_IN_SIZE); flags = 0; flags |= (dev->caps.vl_cap[port] & 0xf) << INIT_PORT_VL_SHIFT; flags |= (dev->caps.port_width_cap[port] & 0xf) << INIT_PORT_PORT_WIDTH_SHIFT; MLX4_PUT(inbox, flags, INIT_PORT_FLAGS_OFFSET); field = 128 << dev->caps.ib_mtu_cap[port]; MLX4_PUT(inbox, field, INIT_PORT_MTU_OFFSET); field = dev->caps.gid_table_len[port]; MLX4_PUT(inbox, field, INIT_PORT_MAX_GID_OFFSET); field = dev->caps.pkey_table_len[port]; MLX4_PUT(inbox, field, INIT_PORT_MAX_PKEY_OFFSET); err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_INIT_PORT, MLX4_CMD_TIME_CLASS_A); mlx4_free_cmd_mailbox(dev, mailbox); } else err = mlx4_cmd(dev, 0, port, 0, MLX4_CMD_INIT_PORT, MLX4_CMD_TIME_CLASS_A); return err; } EXPORT_SYMBOL_GPL(mlx4_INIT_PORT); int mlx4_CLOSE_PORT(struct mlx4_dev *dev, int port) { return mlx4_cmd(dev, 0, port, 0, MLX4_CMD_CLOSE_PORT, 1000); } EXPORT_SYMBOL_GPL(mlx4_CLOSE_PORT); int mlx4_CLOSE_HCA(struct mlx4_dev *dev, int panic) { return mlx4_cmd(dev, 0, 0, panic, MLX4_CMD_CLOSE_HCA, 1000); } int mlx4_SET_ICM_SIZE(struct mlx4_dev *dev, u64 icm_size, u64 *aux_pages) { int ret = mlx4_cmd_imm(dev, icm_size, aux_pages, 0, 0, MLX4_CMD_SET_ICM_SIZE, MLX4_CMD_TIME_CLASS_A); if (ret) return ret; /* * Round up number of system pages needed in case * MLX4_ICM_PAGE_SIZE < PAGE_SIZE. */ *aux_pages = ALIGN(*aux_pages, PAGE_SIZE / MLX4_ICM_PAGE_SIZE) >> (PAGE_SHIFT - MLX4_ICM_PAGE_SHIFT); return 0; } int mlx4_NOP(struct mlx4_dev *dev) { /* Input modifier of 0x1f means "finish as soon as possible." */ return mlx4_cmd(dev, 0, 0x1f, 0, MLX4_CMD_NOP, 100); } #define MLX4_WOL_SETUP_MODE (5 << 28) int mlx4_wol_read(struct mlx4_dev *dev, u64 *config, int port) { u32 in_mod = MLX4_WOL_SETUP_MODE | port << 8; return mlx4_cmd_imm(dev, 0, config, in_mod, 0x3, MLX4_CMD_MOD_STAT_CFG, MLX4_CMD_TIME_CLASS_A); } EXPORT_SYMBOL_GPL(mlx4_wol_read); int mlx4_wol_write(struct mlx4_dev *dev, u64 config, int port) { u32 in_mod = MLX4_WOL_SETUP_MODE | port << 8; return mlx4_cmd(dev, config, in_mod, 0x1, MLX4_CMD_MOD_STAT_CFG, MLX4_CMD_TIME_CLASS_A); } EXPORT_SYMBOL_GPL(mlx4_wol_write);