text: /*
   *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   *
   *  HCA query functions
   *
   *  Authors: Heiko J Schick <schickhj@de.ibm.com>
   *           Christoph Raisch <raisch@de.ibm.com>
   *
   *  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.
   */
  
  #include "ehca_tools.h"
  #include "ehca_iverbs.h"
  #include "hcp_if.h"
  
  static unsigned int limit_uint(unsigned int value)
  {
  	return min_t(unsigned int, value, INT_MAX);
  }
  
  int ehca_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
  {
  	int i, ret = 0;
  	struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
  					      ib_device);
  	struct hipz_query_hca *rblock;
  
  	static const u32 cap_mapping[] = {
  		IB_DEVICE_RESIZE_MAX_WR,      HCA_CAP_WQE_RESIZE,
  		IB_DEVICE_BAD_PKEY_CNTR,      HCA_CAP_BAD_P_KEY_CTR,
  		IB_DEVICE_BAD_QKEY_CNTR,      HCA_CAP_Q_KEY_VIOL_CTR,
  		IB_DEVICE_RAW_MULTI,          HCA_CAP_RAW_PACKET_MCAST,
  		IB_DEVICE_AUTO_PATH_MIG,      HCA_CAP_AUTO_PATH_MIG,
  		IB_DEVICE_CHANGE_PHY_PORT,    HCA_CAP_SQD_RTS_PORT_CHANGE,
  		IB_DEVICE_UD_AV_PORT_ENFORCE, HCA_CAP_AH_PORT_NR_CHECK,
  		IB_DEVICE_CURR_QP_STATE_MOD,  HCA_CAP_CUR_QP_STATE_MOD,
  		IB_DEVICE_SHUTDOWN_PORT,      HCA_CAP_SHUTDOWN_PORT,
  		IB_DEVICE_INIT_TYPE,          HCA_CAP_INIT_TYPE,
  		IB_DEVICE_PORT_ACTIVE_EVENT,  HCA_CAP_PORT_ACTIVE_EVENT,
  	};
  
  	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 query_device1;
  	}
  
  	memset(props, 0, sizeof(struct ib_device_attr));
  	props->page_size_cap   = shca->hca_cap_mr_pgsize;
  	props->fw_ver          = rblock->hw_ver;
  	props->max_mr_size     = rblock->max_mr_size;
  	props->vendor_id       = rblock->vendor_id >> 8;
  	props->vendor_part_id  = rblock->vendor_part_id >> 16;
  	props->hw_ver          = rblock->hw_ver;
  	props->max_qp          = limit_uint(rblock->max_qp);
  	props->max_qp_wr       = limit_uint(rblock->max_wqes_wq);
  	props->max_sge         = limit_uint(rblock->max_sge);
  	props->max_sge_rd      = limit_uint(rblock->max_sge_rd);
  	props->max_cq          = limit_uint(rblock->max_cq);
  	props->max_cqe         = limit_uint(rblock->max_cqe);
  	props->max_mr          = limit_uint(rblock->max_mr);
  	props->max_mw          = limit_uint(rblock->max_mw);
  	props->max_pd          = limit_uint(rblock->max_pd);
  	props->max_ah          = limit_uint(rblock->max_ah);
  	props->max_ee          = limit_uint(rblock->max_rd_ee_context);
  	props->max_rdd         = limit_uint(rblock->max_rd_domain);
  	props->max_fmr         = limit_uint(rblock->max_mr);
  	props->max_qp_rd_atom  = limit_uint(rblock->max_rr_qp);
  	props->max_ee_rd_atom  = limit_uint(rblock->max_rr_ee_context);
  	props->max_res_rd_atom = limit_uint(rblock->max_rr_hca);
  	props->max_qp_init_rd_atom = limit_uint(rblock->max_act_wqs_qp);
  	props->max_ee_init_rd_atom = limit_uint(rblock->max_act_wqs_ee_context);
  
  	if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
  		props->max_srq         = limit_uint(props->max_qp);
  		props->max_srq_wr      = limit_uint(props->max_qp_wr);
  		props->max_srq_sge     = 3;
  	}
  
  	props->max_pkeys           = 16;
  	/* Some FW versions say 0 here; insert sensible value in that case */
  	props->local_ca_ack_delay  = rblock->local_ca_ack_delay ?
  		min_t(u8, rblock->local_ca_ack_delay, 255) : 12;
  	props->max_raw_ipv6_qp     = limit_uint(rblock->max_raw_ipv6_qp);
  	props->max_raw_ethy_qp     = limit_uint(rblock->max_raw_ethy_qp);
  	props->max_mcast_grp       = limit_uint(rblock->max_mcast_grp);
  	props->max_mcast_qp_attach = limit_uint(rblock->max_mcast_qp_attach);
  	props->max_total_mcast_qp_attach
  		= limit_uint(rblock->max_total_mcast_qp_attach);
  
  	/* translate device capabilities */
  	props->device_cap_flags = IB_DEVICE_SYS_IMAGE_GUID |
  		IB_DEVICE_RC_RNR_NAK_GEN | IB_DEVICE_N_NOTIFY_CQ;
  	for (i = 0; i < ARRAY_SIZE(cap_mapping); i += 2)
  		if (rblock->hca_cap_indicators & cap_mapping[i + 1])
  			props->device_cap_flags |= cap_mapping[i];
  
  query_device1:
  	ehca_free_fw_ctrlblock(rblock);
  
  	return ret;
  }
  
  static enum ib_mtu map_mtu(struct ehca_shca *shca, u32 fw_mtu)
  {
  	switch (fw_mtu) {
  	case 0x1:
  		return IB_MTU_256;
  	case 0x2:
  		return IB_MTU_512;
  	case 0x3:
  		return IB_MTU_1024;
  	case 0x4:
  		return IB_MTU_2048;
  	case 0x5:
  		return IB_MTU_4096;
  	default:
  		ehca_err(&shca->ib_device, "Unknown MTU size: %x.",
  			 fw_mtu);
  		return 0;
  	}
  }
  
  static u8 map_number_of_vls(struct ehca_shca *shca, u32 vl_cap)
  {
  	switch (vl_cap) {
  	case 0x1:
  		return 1;
  	case 0x2:
  		return 2;
  	case 0x3:
  		return 4;
  	case 0x4:
  		return 8;
  	case 0x5:
  		return 15;
  	default:
  		ehca_err(&shca->ib_device, "invalid Vl Capability: %x.",
  			 vl_cap);
  		return 0;
  	}
  }
  
  int ehca_query_port(struct ib_device *ibdev,
  		    u8 port, struct ib_port_attr *props)
  {
  	int ret = 0;
  	u64 h_ret;
  	struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
  					      ib_device);
  	struct hipz_query_port *rblock;
  
  	rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
  	if (!rblock) {
  		ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
  		return -ENOMEM;
  	}
  
  	h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
  	if (h_ret != H_SUCCESS) {
  		ehca_err(&shca->ib_device, "Can't query port properties");
  		ret = -EINVAL;
  		goto query_port1;
  	}
  
  	memset(props, 0, sizeof(struct ib_port_attr));
  
  	props->active_mtu = props->max_mtu = map_mtu(shca, rblock->max_mtu);
  	props->port_cap_flags  = rblock->capability_mask;
  	props->gid_tbl_len     = rblock->gid_tbl_len;
  	if (rblock->max_msg_sz)
  		props->max_msg_sz      = rblock->max_msg_sz;
  	else
  		props->max_msg_sz      = 0x1 << 31;
  	props->bad_pkey_cntr   = rblock->bad_pkey_cntr;
  	props->qkey_viol_cntr  = rblock->qkey_viol_cntr;
  	props->pkey_tbl_len    = rblock->pkey_tbl_len;
  	props->lid             = rblock->lid;
  	props->sm_lid          = rblock->sm_lid;
  	props->lmc             = rblock->lmc;
  	props->sm_sl           = rblock->sm_sl;
  	props->subnet_timeout  = rblock->subnet_timeout;
  	props->init_type_reply = rblock->init_type_reply;
  	props->max_vl_num      = map_number_of_vls(shca, rblock->vl_cap);
  
  	if (rblock->state && rblock->phys_width) {
  		props->phys_state      = rblock->phys_pstate;
  		props->state           = rblock->phys_state;
  		props->active_width    = rblock->phys_width;
  		props->active_speed    = rblock->phys_speed;
  	} else {
  		/* old firmware releases don't report physical
  		 * port info, so use default values
  		 */
  		props->phys_state      = 5;
  		props->state           = rblock->state;
  		props->active_width    = IB_WIDTH_12X;
  		props->active_speed    = 0x1;
  	}
  
  query_port1:
  	ehca_free_fw_ctrlblock(rblock);
  
  	return ret;
  }
  
  int ehca_query_sma_attr(struct ehca_shca *shca,
  			u8 port, struct ehca_sma_attr *attr)
  {
  	int ret = 0;
  	u64 h_ret;
  	struct hipz_query_port *rblock;
  
  	rblock = ehca_alloc_fw_ctrlblock(GFP_ATOMIC);
  	if (!rblock) {
  		ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
  		return -ENOMEM;
  	}
  
  	h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
  	if (h_ret != H_SUCCESS) {
  		ehca_err(&shca->ib_device, "Can't query port properties");
  		ret = -EINVAL;
  		goto query_sma_attr1;
  	}
  
  	memset(attr, 0, sizeof(struct ehca_sma_attr));
  
  	attr->lid    = rblock->lid;
  	attr->lmc    = rblock->lmc;
  	attr->sm_sl  = rblock->sm_sl;
  	attr->sm_lid = rblock->sm_lid;
  
  	attr->pkey_tbl_len = rblock->pkey_tbl_len;
  	memcpy(attr->pkeys, rblock->pkey_entries, sizeof(attr->pkeys));
  
  query_sma_attr1:
  	ehca_free_fw_ctrlblock(rblock);
  
  	return ret;
  }
  
  int ehca_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
  {
  	int ret = 0;
  	u64 h_ret;
  	struct ehca_shca *shca;
  	struct hipz_query_port *rblock;
  
  	shca = container_of(ibdev, struct ehca_shca, ib_device);
  	if (index > 16) {
  		ehca_err(&shca->ib_device, "Invalid index: %x.", index);
  		return -EINVAL;
  	}
  
  	rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
  	if (!rblock) {
  		ehca_err(&shca->ib_device,  "Can't allocate rblock memory.");
  		return -ENOMEM;
  	}
  
  	h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
  	if (h_ret != H_SUCCESS) {
  		ehca_err(&shca->ib_device, "Can't query port properties");
  		ret = -EINVAL;
  		goto query_pkey1;
  	}
  
  	memcpy(pkey, &rblock->pkey_entries + index, sizeof(u16));
  
  query_pkey1:
  	ehca_free_fw_ctrlblock(rblock);
  
  	return ret;
  }
  
  int ehca_query_gid(struct ib_device *ibdev, u8 port,
  		   int index, union ib_gid *gid)
  {
  	int ret = 0;
  	u64 h_ret;
  	struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
  					      ib_device);
  	struct hipz_query_port *rblock;
  
  	if (index < 0 || index > 255) {
  		ehca_err(&shca->ib_device, "Invalid index: %x.", index);
  		return -EINVAL;
  	}
  
  	rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
  	if (!rblock) {
  		ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
  		return -ENOMEM;
  	}
  
  	h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
  	if (h_ret != H_SUCCESS) {
  		ehca_err(&shca->ib_device, "Can't query port properties");
  		ret = -EINVAL;
  		goto query_gid1;
  	}
  
  	memcpy(&gid->raw[0], &rblock->gid_prefix, sizeof(u64));
  	memcpy(&gid->raw[8], &rblock->guid_entries[index], sizeof(u64));
  
  query_gid1:
  	ehca_free_fw_ctrlblock(rblock);
  
  	return ret;
  }
  
  static const u32 allowed_port_caps = (
  	IB_PORT_SM | IB_PORT_LED_INFO_SUP | IB_PORT_CM_SUP |
  	IB_PORT_SNMP_TUNNEL_SUP | IB_PORT_DEVICE_MGMT_SUP |
  	IB_PORT_VENDOR_CLASS_SUP);
  
  int ehca_modify_port(struct ib_device *ibdev,
  		     u8 port, int port_modify_mask,
  		     struct ib_port_modify *props)
  {
  	int ret = 0;
  	struct ehca_shca *shca;
  	struct hipz_query_port *rblock;
  	u32 cap;
  	u64 hret;
  
  	shca = container_of(ibdev, struct ehca_shca, ib_device);
  	if ((props->set_port_cap_mask | props->clr_port_cap_mask)
  	    & ~allowed_port_caps) {
  		ehca_err(&shca->ib_device, "Non-changeable bits set in masks  "
  			 "set=%x  clr=%x  allowed=%x", props->set_port_cap_mask,
  			 props->clr_port_cap_mask, allowed_port_caps);
  		return -EINVAL;
  	}
  
  	if (mutex_lock_interruptible(&shca->modify_mutex))
  		return -ERESTARTSYS;
  
  	rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
  	if (!rblock) {
  		ehca_err(&shca->ib_device,  "Can't allocate rblock memory.");
  		ret = -ENOMEM;
  		goto modify_port1;
  	}
  
  	hret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
  	if (hret != H_SUCCESS) {
  		ehca_err(&shca->ib_device, "Can't query port properties");
  		ret = -EINVAL;
  		goto modify_port2;
  	}
  
  	cap = (rblock->capability_mask | props->set_port_cap_mask)
  		& ~props->clr_port_cap_mask;
  
  	hret = hipz_h_modify_port(shca->ipz_hca_handle, port,
  				  cap, props->init_type, port_modify_mask);
  	if (hret != H_SUCCESS) {
  		ehca_err(&shca->ib_device, "Modify port failed  h_ret=%lli",
  			 hret);
  		ret = -EINVAL;
  	}
  
  modify_port2:
  	ehca_free_fw_ctrlblock(rblock);
  
  modify_port1:
  	mutex_unlock(&shca->modify_mutex);
  
  	return ret;
  }
  