/* * IBM eServer eHCA Infiniband device driver for Linux on POWER * * module start stop, hca detection * * Authors: Heiko J Schick * Hoang-Nam Nguyen * Joachim Fenkes * * Copyright (c) 2005 IBM Corporation * * All rights reserved. * * This source code is distributed under a dual license of GPL v2.0 and OpenIB * BSD. * * OpenIB BSD License * * 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. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifdef CONFIG_PPC_64K_PAGES #include #endif #include #include #include "ehca_classes.h" #include "ehca_iverbs.h" #include "ehca_mrmw.h" #include "ehca_tools.h" #include "hcp_if.h" #define HCAD_VERSION "0029" MODULE_LICENSE("Dual BSD/GPL"); MODULE_AUTHOR("Christoph Raisch "); MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver"); MODULE_VERSION(HCAD_VERSION); static bool ehca_open_aqp1 = 0; static int ehca_hw_level = 0; static bool ehca_poll_all_eqs = 1; int ehca_debug_level = 0; int ehca_nr_ports = -1; bool ehca_use_hp_mr = 0; int ehca_port_act_time = 30; int ehca_static_rate = -1; bool ehca_scaling_code = 0; int ehca_lock_hcalls = -1; int ehca_max_cq = -1; int ehca_max_qp = -1; module_param_named(open_aqp1, ehca_open_aqp1, bool, S_IRUGO); module_param_named(debug_level, ehca_debug_level, int, S_IRUGO); module_param_named(hw_level, ehca_hw_level, int, S_IRUGO); module_param_named(nr_ports, ehca_nr_ports, int, S_IRUGO); module_param_named(use_hp_mr, ehca_use_hp_mr, bool, S_IRUGO); module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO); module_param_named(poll_all_eqs, ehca_poll_all_eqs, bool, S_IRUGO); module_param_named(static_rate, ehca_static_rate, int, S_IRUGO); module_param_named(scaling_code, ehca_scaling_code, bool, S_IRUGO); module_param_named(lock_hcalls, ehca_lock_hcalls, bint, S_IRUGO); module_param_named(number_of_cqs, ehca_max_cq, int, S_IRUGO); module_param_named(number_of_qps, ehca_max_qp, int, S_IRUGO); MODULE_PARM_DESC(open_aqp1, "Open AQP1 on startup (default: no)"); MODULE_PARM_DESC(debug_level, "Amount of debug output (0: none (default), 1: traces, " "2: some dumps, 3: lots)"); MODULE_PARM_DESC(hw_level, "Hardware level (0: autosensing (default), " "0x10..0x14: eHCA, 0x20..0x23: eHCA2)"); MODULE_PARM_DESC(nr_ports, "number of connected ports (-1: autodetect (default), " "1: port one only, 2: two ports)"); MODULE_PARM_DESC(use_hp_mr, "Use high performance MRs (default: no)"); MODULE_PARM_DESC(port_act_time, "Time to wait for port activation (default: 30 sec)"); MODULE_PARM_DESC(poll_all_eqs, "Poll all event queues periodically (default: yes)"); MODULE_PARM_DESC(static_rate, "Set permanent static rate (default: no static rate)"); MODULE_PARM_DESC(scaling_code, "Enable scaling code (default: no)"); MODULE_PARM_DESC(lock_hcalls, "Serialize all hCalls made by the driver " "(default: autodetect)"); MODULE_PARM_DESC(number_of_cqs, "Max number of CQs which can be allocated " "(default: autodetect)"); MODULE_PARM_DESC(number_of_qps, "Max number of QPs which can be allocated " "(default: autodetect)"); DEFINE_RWLOCK(ehca_qp_idr_lock); DEFINE_RWLOCK(ehca_cq_idr_lock); DEFINE_IDR(ehca_qp_idr); DEFINE_IDR(ehca_cq_idr); static LIST_HEAD(shca_list); /* list of all registered ehcas */ DEFINE_SPINLOCK(shca_list_lock); static struct timer_list poll_eqs_timer; #ifdef CONFIG_PPC_64K_PAGES static struct kmem_cache *ctblk_cache; void *ehca_alloc_fw_ctrlblock(gfp_t flags) { void *ret = kmem_cache_zalloc(ctblk_cache, flags); if (!ret) ehca_gen_err("Out of memory for ctblk"); return ret; } void ehca_free_fw_ctrlblock(void *ptr) { if (ptr) kmem_cache_free(ctblk_cache, ptr); } #endif int ehca2ib_return_code(u64 ehca_rc) { switch (ehca_rc) { case H_SUCCESS: return 0; case H_RESOURCE: /* Resource in use */ case H_BUSY: return -EBUSY; case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */ case H_CONSTRAINED: /* resource constraint */ case H_NO_MEM: return -ENOMEM; default: return -EINVAL; } } static int ehca_create_slab_caches(void) { int ret; ret = ehca_init_pd_cache(); if (ret) { ehca_gen_err("Cannot create PD SLAB cache."); return ret; } ret = ehca_init_cq_cache(); if (ret) { ehca_gen_err("Cannot create CQ SLAB cache."); goto create_slab_caches2; } ret = ehca_init_qp_cache(); if (ret) { ehca_gen_err("Cannot create QP SLAB cache."); goto create_slab_caches3; } ret = ehca_init_av_cache(); if (ret) { ehca_gen_err("Cannot create AV SLAB cache."); goto create_slab_caches4; } ret = ehca_init_mrmw_cache(); if (ret) { ehca_gen_err("Cannot create MR&MW SLAB cache."); goto create_slab_caches5; } ret = ehca_init_small_qp_cache(); if (ret) { ehca_gen_err("Cannot create small queue SLAB cache."); goto create_slab_caches6; } #ifdef CONFIG_PPC_64K_PAGES ctblk_cache = kmem_cache_create("ehca_cache_ctblk", EHCA_PAGESIZE, H_CB_ALIGNMENT, SLAB_HWCACHE_ALIGN, NULL); if (!ctblk_cache) { ehca_gen_err("Cannot create ctblk SLAB cache."); ehca_cleanup_small_qp_cache(); ret = -ENOMEM; goto create_slab_caches6; } #endif return 0; create_slab_caches6: ehca_cleanup_mrmw_cache(); create_slab_caches5: ehca_cleanup_av_cache(); create_slab_caches4: ehca_cleanup_qp_cache(); create_slab_caches3: ehca_cleanup_cq_cache(); create_slab_caches2: ehca_cleanup_pd_cache(); return ret; } static void ehca_destroy_slab_caches(void) { ehca_cleanup_small_qp_cache(); ehca_cleanup_mrmw_cache(); ehca_cleanup_av_cache(); ehca_cleanup_qp_cache(); ehca_cleanup_cq_cache(); ehca_cleanup_pd_cache(); #ifdef CONFIG_PPC_64K_PAGES if (ctblk_cache) kmem_cache_destroy(ctblk_cache); #endif } #define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39) #define EHCA_REVID EHCA_BMASK_IBM(40, 63) static struct cap_descr { u64 mask; char *descr; } hca_cap_descr[] = { { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" }, { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" }, { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" }, { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" }, { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" }, { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" }, { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" }, { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" }, { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" }, { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" }, { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" }, { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" }, { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" }, { HCA_CAP_SRQ, "HCA_CAP_SRQ" }, { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" }, { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" }, { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" }, { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" }, }; static int ehca_sense_attributes(struct ehca_shca *shca) { int i, ret = 0; u64 h_ret; struct hipz_query_hca *rblock; struct hipz_query_port *port; const char *loc_code; static const u32 pgsize_map[] = { HCA_CAP_MR_PGSIZE_4K, 0x1000, HCA_CAP_MR_PGSIZE_64K, 0x10000, HCA_CAP_MR_PGSIZE_1M, 0x100000, HCA_CAP_MR_PGSIZE_16M, 0x1000000, }; ehca_gen_dbg("Probing adapter %s...", shca->ofdev->dev.of_node->full_name); loc_code = of_get_property(shca->ofdev->dev.of_node, "ibm,loc-code", NULL); if (loc_code) ehca_gen_dbg(" ... location lode=%s", loc_code); rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); if (!rblock) { ehca_gen_err("Cannot allocate rblock memory."); return -ENOMEM; } h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock); if (h_ret != H_SUCCESS) { ehca_gen_err("Cannot query device properties. h_ret=%lli", h_ret); ret = -EPERM; goto sense_attributes1; } if (ehca_nr_ports == 1) shca->num_ports = 1; else shca->num_ports = (u8)rblock->num_ports; ehca_gen_dbg(" ... found %x ports", rblock->num_ports); if (ehca_hw_level == 0) { u32 hcaaver; u32 revid; hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver); revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver); ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid); if (hcaaver == 1) { if (revid <= 3) shca->hw_level = 0x10 | (revid + 1); else shca->hw_level = 0x14; } else if (hcaaver == 2) { if (revid == 0) shca->hw_level = 0x21; else if (revid == 0x10) shca->hw_level = 0x22; else if (revid == 0x20 || revid == 0x21) shca->hw_level = 0x23; } if (!shca->hw_level) { ehca_gen_warn("unknown hardware version" " - assuming default level"); shca->hw_level = 0x22; } } else shca->hw_level = ehca_hw_level; ehca_gen_dbg(" ... hardware level=%x", shca->hw_level); shca->hca_cap = rblock->hca_cap_indicators; ehca_gen_dbg(" ... HCA capabilities:"); for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++) if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap)) ehca_gen_dbg(" %s", hca_cap_descr[i].descr); /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is * a firmware property, so it's valid across all adapters */ if (ehca_lock_hcalls == -1) ehca_lock_hcalls = !EHCA_BMASK_GET(HCA_CAP_H_ALLOC_RES_SYNC, shca->hca_cap); /* translate supported MR page sizes; always support 4K */ shca->hca_cap_mr_pgsize = EHCA_PAGESIZE; for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2) if (rblock->memory_page_size_supported & pgsize_map[i]) shca->hca_cap_mr_pgsize |= pgsize_map[i + 1]; /* Set maximum number of CQs and QPs to calculate EQ size */ if (shca->max_num_qps == -1) shca->max_num_qps = min_t(int, rblock->max_qp, EHCA_MAX_NUM_QUEUES); else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) { ehca_gen_warn("The requested number of QPs is out of range " "(1 - %i) specified by HW. Value is set to %i", rblock->max_qp, rblock->max_qp); shca->max_num_qps = rblock->max_qp; } if (shca->max_num_cqs == -1) shca->max_num_cqs = min_t(int, rblock->max_cq, EHCA_MAX_NUM_QUEUES); else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) { ehca_gen_warn("The requested number of CQs is out of range " "(1 - %i) specified by HW. Value is set to %i", rblock->max_cq, rblock->max_cq); } /* query max MTU from first port -- it's the same for all ports */ port = (struct hipz_query_port *)rblock; h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port); if (h_ret != H_SUCCESS) { ehca_gen_err("Cannot query port properties. h_ret=%lli", h_ret); ret = -EPERM; goto sense_attributes1; } shca->max_mtu = port->max_mtu; sense_attributes1: ehca_free_fw_ctrlblock(rblock); return ret; } static int init_node_guid(struct ehca_shca *shca) { int ret = 0; struct hipz_query_hca *rblock; rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); if (!rblock) { ehca_err(&shca->ib_device, "Can't allocate rblock memory."); return -ENOMEM; } if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { ehca_err(&shca->ib_device, "Can't query device properties"); ret = -EINVAL; goto init_node_guid1; } memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64)); init_node_guid1: ehca_free_fw_ctrlblock(rblock); return ret; } static int ehca_port_immutable(struct ib_device *ibdev, u8 port_num, struct ib_port_immutable *immutable) { struct ib_port_attr attr; int err; err = ehca_query_port(ibdev, port_num, &attr); if (err) return err; immutable->pkey_tbl_len = attr.pkey_tbl_len; immutable->gid_tbl_len = attr.gid_tbl_len; immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB; return 0; } static int ehca_init_device(struct ehca_shca *shca) { int ret; ret = init_node_guid(shca); if (ret) return ret; strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX); shca->ib_device.owner = THIS_MODULE; shca->ib_device.uverbs_abi_ver = 8; shca->ib_device.uverbs_cmd_mask = (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | (1ull << IB_USER_VERBS_CMD_REG_MR) | (1ull << IB_USER_VERBS_CMD_DEREG_MR) | (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | (1ull << IB_USER_VERBS_CMD_CREATE_QP) | (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | (1ull << IB_USER_VERBS_CMD_QUERY_QP) | (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) | (1ull << IB_USER_VERBS_CMD_DETACH_MCAST); shca->ib_device.node_type = RDMA_NODE_IB_CA; shca->ib_device.phys_port_cnt = shca->num_ports; shca->ib_device.num_comp_vectors = 1; shca->ib_device.dma_device = &shca->ofdev->dev; shca->ib_device.query_device = ehca_query_device; shca->ib_device.query_port = ehca_query_port; shca->ib_device.query_gid = ehca_query_gid; shca->ib_device.query_pkey = ehca_query_pkey; /* shca->in_device.modify_device = ehca_modify_device */ shca->ib_device.modify_port = ehca_modify_port; shca->ib_device.alloc_ucontext = ehca_alloc_ucontext; shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext; shca->ib_device.alloc_pd = ehca_alloc_pd; shca->ib_device.dealloc_pd = ehca_dealloc_pd; shca->ib_device.create_ah = ehca_create_ah; /* shca->ib_device.modify_ah = ehca_modify_ah; */ shca->ib_device.query_ah = ehca_query_ah; shca->ib_device.destroy_ah = ehca_destroy_ah; shca->ib_device.create_qp = ehca_create_qp; shca->ib_device.modify_qp = ehca_modify_qp; shca->ib_device.query_qp = ehca_query_qp; shca->ib_device.destroy_qp = ehca_destroy_qp; shca->ib_device.post_send = ehca_post_send; shca->ib_device.post_recv = ehca_post_recv; shca->ib_device.create_cq = ehca_create_cq; shca->ib_device.destroy_cq = ehca_destroy_cq; shca->ib_device.resize_cq = ehca_resize_cq; shca->ib_device.poll_cq = ehca_poll_cq; /* shca->ib_device.peek_cq = ehca_peek_cq; */ shca->ib_device.req_notify_cq = ehca_req_notify_cq; /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */ shca->ib_device.get_dma_mr = ehca_get_dma_mr; shca->ib_device.reg_phys_mr = ehca_reg_phys_mr; shca->ib_device.reg_user_mr = ehca_reg_user_mr; shca->ib_device.query_mr = ehca_query_mr; shca->ib_device.dereg_mr = ehca_dereg_mr; shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr; shca->ib_device.alloc_mw = ehca_alloc_mw; shca->ib_device.bind_mw = ehca_bind_mw; shca->ib_device.dealloc_mw = ehca_dealloc_mw; shca->ib_device.alloc_fmr = ehca_alloc_fmr; shca->ib_device.map_phys_fmr = ehca_map_phys_fmr; shca->ib_device.unmap_fmr = ehca_unmap_fmr; shca->ib_device.dealloc_fmr = ehca_dealloc_fmr; shca->ib_device.attach_mcast = ehca_attach_mcast; shca->ib_device.detach_mcast = ehca_detach_mcast; shca->ib_device.process_mad = ehca_process_mad; shca->ib_device.mmap = ehca_mmap; shca->ib_device.dma_ops = &ehca_dma_mapping_ops; shca->ib_device.get_port_immutable = ehca_port_immutable; if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) { shca->ib_device.uverbs_cmd_mask |= (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) | (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) | (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) | (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ); shca->ib_device.create_srq = ehca_create_srq; shca->ib_device.modify_srq = ehca_modify_srq; shca->ib_device.query_srq = ehca_query_srq; shca->ib_device.destroy_srq = ehca_destroy_srq; shca->ib_device.post_srq_recv = ehca_post_srq_recv; } return ret; } static int ehca_create_aqp1(struct ehca_shca *shca, u32 port) { struct ehca_sport *sport = &shca->sport[port - 1]; struct ib_cq *ibcq; struct ib_qp *ibqp; struct ib_qp_init_attr qp_init_attr; int ret; if (sport->ibcq_aqp1) { ehca_err(&shca->ib_device, "AQP1 CQ is already created."); return -EPERM; } ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0); if (IS_ERR(ibcq)) { ehca_err(&shca->ib_device, "Cannot create AQP1 CQ."); return PTR_ERR(ibcq); } sport->ibcq_aqp1 = ibcq; if (sport->ibqp_sqp[IB_QPT_GSI]) { ehca_err(&shca->ib_device, "AQP1 QP is already created."); ret = -EPERM; goto create_aqp1; } memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr)); qp_init_attr.send_cq = ibcq; qp_init_attr.recv_cq = ibcq; qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; qp_init_attr.cap.max_send_wr = 100; qp_init_attr.cap.max_recv_wr = 100; qp_init_attr.cap.max_send_sge = 2; qp_init_attr.cap.max_recv_sge = 1; qp_init_attr.qp_type = IB_QPT_GSI; qp_init_attr.port_num = port; qp_init_attr.qp_context = NULL; qp_init_attr.event_handler = NULL; qp_init_attr.srq = NULL; ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr); if (IS_ERR(ibqp)) { ehca_err(&shca->ib_device, "Cannot create AQP1 QP."); ret = PTR_ERR(ibqp); goto create_aqp1; } sport->ibqp_sqp[IB_QPT_GSI] = ibqp; return 0; create_aqp1: ib_destroy_cq(sport->ibcq_aqp1); return ret; } static int ehca_destroy_aqp1(struct ehca_sport *sport) { int ret; ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]); if (ret) { ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret); return ret; } ret = ib_destroy_cq(sport->ibcq_aqp1); if (ret) ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret); return ret; } static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf) { return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level); } static ssize_t ehca_store_debug_level(struct device_driver *ddp, const char *buf, size_t count) { int value = (*buf) - '0'; if (value >= 0 && value <= 9) ehca_debug_level = value; return 1; } static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR, ehca_show_debug_level, ehca_store_debug_level); static struct attribute *ehca_drv_attrs[] = { &driver_attr_debug_level.attr, NULL }; static struct attribute_group ehca_drv_attr_grp = { .attrs = ehca_drv_attrs }; static const struct attribute_group *ehca_drv_attr_groups[] = { &ehca_drv_attr_grp, NULL, }; #define EHCA_RESOURCE_ATTR(name) \ static ssize_t ehca_show_##name(struct device *dev, \ struct device_attribute *attr, \ char *buf) \ { \ struct ehca_shca *shca; \ struct hipz_query_hca *rblock; \ int data; \ \ shca = dev_get_drvdata(dev); \ \ rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \ if (!rblock) { \ dev_err(dev, "Can't allocate rblock memory.\n"); \ return 0; \ } \ \ if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \ dev_err(dev, "Can't query device properties\n"); \ ehca_free_fw_ctrlblock(rblock); \ return 0; \ } \ \ data = rblock->name; \ ehca_free_fw_ctrlblock(rblock); \ \ if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \ return snprintf(buf, 256, "1\n"); \ else \ return snprintf(buf, 256, "%d\n", data); \ \ } \ static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL); EHCA_RESOURCE_ATTR(num_ports); EHCA_RESOURCE_ATTR(hw_ver); EHCA_RESOURCE_ATTR(max_eq); EHCA_RESOURCE_ATTR(cur_eq); EHCA_RESOURCE_ATTR(max_cq); EHCA_RESOURCE_ATTR(cur_cq); EHCA_RESOURCE_ATTR(max_qp); EHCA_RESOURCE_ATTR(cur_qp); EHCA_RESOURCE_ATTR(max_mr); EHCA_RESOURCE_ATTR(cur_mr); EHCA_RESOURCE_ATTR(max_mw); EHCA_RESOURCE_ATTR(cur_mw); EHCA_RESOURCE_ATTR(max_pd); EHCA_RESOURCE_ATTR(max_ah); static ssize_t ehca_show_adapter_handle(struct device *dev, struct device_attribute *attr, char *buf) { struct ehca_shca *shca = dev_get_drvdata(dev); return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle); } static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL); static struct attribute *ehca_dev_attrs[] = { &dev_attr_adapter_handle.attr, &dev_attr_num_ports.attr, &dev_attr_hw_ver.attr, &dev_attr_max_eq.attr, &dev_attr_cur_eq.attr, &dev_attr_max_cq.attr, &dev_attr_cur_cq.attr, &dev_attr_max_qp.attr, &dev_attr_cur_qp.attr, &dev_attr_max_mr.attr, &dev_attr_cur_mr.attr, &dev_attr_max_mw.attr, &dev_attr_cur_mw.attr, &dev_attr_max_pd.attr, &dev_attr_max_ah.attr, NULL }; static struct attribute_group ehca_dev_attr_grp = { .attrs = ehca_dev_attrs }; static int ehca_probe(struct platform_device *dev) { struct ehca_shca *shca; const u64 *handle; struct ib_pd *ibpd; int ret, i, eq_size; unsigned long flags; handle = of_get_property(dev->dev.of_node, "ibm,hca-handle", NULL); if (!handle) { ehca_gen_err("Cannot get eHCA handle for adapter: %s.", dev->dev.of_node->full_name); return -ENODEV; } if (!(*handle)) { ehca_gen_err("Wrong eHCA handle for adapter: %s.", dev->dev.of_node->full_name); return -ENODEV; } shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca)); if (!shca) { ehca_gen_err("Cannot allocate shca memory."); return -ENOMEM; } mutex_init(&shca->modify_mutex); atomic_set(&shca->num_cqs, 0); atomic_set(&shca->num_qps, 0); shca->max_num_qps = ehca_max_qp; shca->max_num_cqs = ehca_max_cq; for (i = 0; i < ARRAY_SIZE(shca->sport); i++) spin_lock_init(&shca->sport[i].mod_sqp_lock); shca->ofdev = dev; shca->ipz_hca_handle.handle = *handle; dev_set_drvdata(&dev->dev, shca); ret = ehca_sense_attributes(shca); if (ret < 0) { ehca_gen_err("Cannot sense eHCA attributes."); goto probe1; } ret = ehca_init_device(shca); if (ret) { ehca_gen_err("Cannot init ehca device struct"); goto probe1; } eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps; /* create event queues */ ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size); if (ret) { ehca_err(&shca->ib_device, "Cannot create EQ."); goto probe1; } ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513); if (ret) { ehca_err(&shca->ib_device, "Cannot create NEQ."); goto probe3; } /* create internal protection domain */ ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL); if (IS_ERR(ibpd)) { ehca_err(&shca->ib_device, "Cannot create internal PD."); ret = PTR_ERR(ibpd); goto probe4; } shca->pd = container_of(ibpd, struct ehca_pd, ib_pd); shca->pd->ib_pd.device = &shca->ib_device; /* create internal max MR */ ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr); if (ret) { ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i", ret); goto probe5; } ret = ib_register_device(&shca->ib_device, NULL); if (ret) { ehca_err(&shca->ib_device, "ib_register_device() failed ret=%i", ret); goto probe6; } /* create AQP1 for port 1 */ if (ehca_open_aqp1 == 1) { shca->sport[0].port_state = IB_PORT_DOWN; ret = ehca_create_aqp1(shca, 1); if (ret) { ehca_err(&shca->ib_device, "Cannot create AQP1 for port 1."); goto probe7; } } /* create AQP1 for port 2 */ if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) { shca->sport[1].port_state = IB_PORT_DOWN; ret = ehca_create_aqp1(shca, 2); if (ret) { ehca_err(&shca->ib_device, "Cannot create AQP1 for port 2."); goto probe8; } } ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp); if (ret) /* only complain; we can live without attributes */ ehca_err(&shca->ib_device, "Cannot create device attributes ret=%d", ret); spin_lock_irqsave(&shca_list_lock, flags); list_add(&shca->shca_list, &shca_list); spin_unlock_irqrestore(&shca_list_lock, flags); return 0; probe8: ret = ehca_destroy_aqp1(&shca->sport[0]); if (ret) ehca_err(&shca->ib_device, "Cannot destroy AQP1 for port 1. ret=%i", ret); probe7: ib_unregister_device(&shca->ib_device); probe6: ret = ehca_dereg_internal_maxmr(shca); if (ret) ehca_err(&shca->ib_device, "Cannot destroy internal MR. ret=%x", ret); probe5: ret = ehca_dealloc_pd(&shca->pd->ib_pd); if (ret) ehca_err(&shca->ib_device, "Cannot destroy internal PD. ret=%x", ret); probe4: ret = ehca_destroy_eq(shca, &shca->neq); if (ret) ehca_err(&shca->ib_device, "Cannot destroy NEQ. ret=%x", ret); probe3: ret = ehca_destroy_eq(shca, &shca->eq); if (ret) ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret); probe1: ib_dealloc_device(&shca->ib_device); return -EINVAL; } static int ehca_remove(struct platform_device *dev) { struct ehca_shca *shca = dev_get_drvdata(&dev->dev); unsigned long flags; int ret; sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp); if (ehca_open_aqp1 == 1) { int i; for (i = 0; i < shca->num_ports; i++) { ret = ehca_destroy_aqp1(&shca->sport[i]); if (ret) ehca_err(&shca->ib_device, "Cannot destroy AQP1 for port %x " "ret=%i", ret, i); } } ib_unregister_device(&shca->ib_device); ret = ehca_dereg_internal_maxmr(shca); if (ret) ehca_err(&shca->ib_device, "Cannot destroy internal MR. ret=%i", ret); ret = ehca_dealloc_pd(&shca->pd->ib_pd); if (ret) ehca_err(&shca->ib_device, "Cannot destroy internal PD. ret=%i", ret); ret = ehca_destroy_eq(shca, &shca->eq); if (ret) ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret); ret = ehca_destroy_eq(shca, &shca->neq); if (ret) ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret); ib_dealloc_device(&shca->ib_device); spin_lock_irqsave(&shca_list_lock, flags); list_del(&shca->shca_list); spin_unlock_irqrestore(&shca_list_lock, flags); return ret; } static struct of_device_id ehca_device_table[] = { { .name = "lhca", .compatible = "IBM,lhca", }, {}, }; MODULE_DEVICE_TABLE(of, ehca_device_table); static struct platform_driver ehca_driver = { .probe = ehca_probe, .remove = ehca_remove, .driver = { .name = "ehca", .owner = THIS_MODULE, .groups = ehca_drv_attr_groups, .of_match_table = ehca_device_table, }, }; void ehca_poll_eqs(unsigned long data) { struct ehca_shca *shca; spin_lock(&shca_list_lock); list_for_each_entry(shca, &shca_list, shca_list) { if (shca->eq.is_initialized) { /* call deadman proc only if eq ptr does not change */ struct ehca_eq *eq = &shca->eq; int max = 3; volatile u64 q_ofs, q_ofs2; unsigned long flags; spin_lock_irqsave(&eq->spinlock, flags); q_ofs = eq->ipz_queue.current_q_offset; spin_unlock_irqrestore(&eq->spinlock, flags); do { spin_lock_irqsave(&eq->spinlock, flags); q_ofs2 = eq->ipz_queue.current_q_offset; spin_unlock_irqrestore(&eq->spinlock, flags); max--; } while (q_ofs == q_ofs2 && max > 0); if (q_ofs == q_ofs2) ehca_process_eq(shca, 0); } } mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ)); spin_unlock(&shca_list_lock); } static int ehca_mem_notifier(struct notifier_block *nb, unsigned long action, void *data) { static unsigned long ehca_dmem_warn_time; unsigned long flags; switch (action) { case MEM_CANCEL_OFFLINE: case MEM_CANCEL_ONLINE: case MEM_ONLINE: case MEM_OFFLINE: return NOTIFY_OK; case MEM_GOING_ONLINE: case MEM_GOING_OFFLINE: /* only ok if no hca is attached to the lpar */ spin_lock_irqsave(&shca_list_lock, flags); if (list_empty(&shca_list)) { spin_unlock_irqrestore(&shca_list_lock, flags); return NOTIFY_OK; } else { spin_unlock_irqrestore(&shca_list_lock, flags); if (printk_timed_ratelimit(&ehca_dmem_warn_time, 30 * 1000)) ehca_gen_err("DMEM operations are not allowed" "in conjunction with eHCA"); return NOTIFY_BAD; } } return NOTIFY_OK; } static struct notifier_block ehca_mem_nb = { .notifier_call = ehca_mem_notifier, }; static int __init ehca_module_init(void) { int ret; printk(KERN_INFO "eHCA Infiniband Device Driver " "(Version " HCAD_VERSION ")\n"); ret = ehca_create_comp_pool(); if (ret) { ehca_gen_err("Cannot create comp pool."); return ret; } ret = ehca_create_slab_caches(); if (ret) { ehca_gen_err("Cannot create SLAB caches"); ret = -ENOMEM; goto module_init1; } ret = ehca_create_busmap(); if (ret) { ehca_gen_err("Cannot create busmap."); goto module_init2; } ret = ibmebus_register_driver(&ehca_driver); if (ret) { ehca_gen_err("Cannot register eHCA device driver"); ret = -EINVAL; goto module_init3; } ret = register_memory_notifier(&ehca_mem_nb); if (ret) { ehca_gen_err("Failed registering memory add/remove notifier"); goto module_init4; } if (ehca_poll_all_eqs != 1) { ehca_gen_err("WARNING!!!"); ehca_gen_err("It is possible to lose interrupts."); } else { init_timer(&poll_eqs_timer); poll_eqs_timer.function = ehca_poll_eqs; poll_eqs_timer.expires = jiffies + HZ; add_timer(&poll_eqs_timer); } return 0; module_init4: ibmebus_unregister_driver(&ehca_driver); module_init3: ehca_destroy_busmap(); module_init2: ehca_destroy_slab_caches(); module_init1: ehca_destroy_comp_pool(); return ret; }; static void __exit ehca_module_exit(void) { if (ehca_poll_all_eqs == 1) del_timer_sync(&poll_eqs_timer); ibmebus_unregister_driver(&ehca_driver); unregister_memory_notifier(&ehca_mem_nb); ehca_destroy_busmap(); ehca_destroy_slab_caches(); ehca_destroy_comp_pool(); idr_destroy(&ehca_cq_idr); idr_destroy(&ehca_qp_idr); }; module_init(ehca_module_init); module_exit(ehca_module_exit);