drivers/net/ethernet/mellanox/mlx4/profile.c - maze/linux - Git at Google

 /*
  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
  * Copyright (c) 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 <linux/slab.h>

 #include "mlx4.h"
 #include "fw.h"

 enum {
 	MLX4_RES_QP,
 	MLX4_RES_RDMARC,
 	MLX4_RES_ALTC,
 	MLX4_RES_AUXC,
 	MLX4_RES_SRQ,
 	MLX4_RES_CQ,
 	MLX4_RES_EQ,
 	MLX4_RES_DMPT,
 	MLX4_RES_CMPT,
 	MLX4_RES_MTT,
 	MLX4_RES_MCG,
 	MLX4_RES_NUM
 };

 static const char *res_name[] = {
 	[MLX4_RES_QP]		= "QP",
 	[MLX4_RES_RDMARC]	= "RDMARC",
 	[MLX4_RES_ALTC]		= "ALTC",
 	[MLX4_RES_AUXC]		= "AUXC",
 	[MLX4_RES_SRQ]		= "SRQ",
 	[MLX4_RES_CQ]		= "CQ",
 	[MLX4_RES_EQ]		= "EQ",
 	[MLX4_RES_DMPT]		= "DMPT",
 	[MLX4_RES_CMPT]		= "CMPT",
 	[MLX4_RES_MTT]		= "MTT",
 	[MLX4_RES_MCG]		= "MCG",
 };

 u64 mlx4_make_profile(struct mlx4_dev *dev,
 		      struct mlx4_profile *request,
 		      struct mlx4_dev_cap *dev_cap,
 		      struct mlx4_init_hca_param *init_hca)
 {
 	struct mlx4_priv *priv = mlx4_priv(dev);
 	struct mlx4_resource {
 		u64 size;
 		u64 start;
 		int type;
 		u32 num;
 		int log_num;
 	};

 	u64 total_size = 0;
 	struct mlx4_resource *profile;
 	struct mlx4_resource tmp;
 	struct sysinfo si;
 	int i, j;

 	profile = kcalloc(MLX4_RES_NUM, sizeof(*profile), GFP_KERNEL);
 	if (!profile)
 		return -ENOMEM;

 	/*
 	 * We want to scale the number of MTTs with the size of the
 	 * system memory, since it makes sense to register a lot of
 	 * memory on a system with a lot of memory.  As a heuristic,
 	 * make sure we have enough MTTs to cover twice the system
 	 * memory (with PAGE_SIZE entries).
 	 *
 	 * This number has to be a power of two and fit into 32 bits
 	 * due to device limitations, so cap this at 2^31 as well.
 	 * That limits us to 8TB of memory registration per HCA with
 	 * 4KB pages, which is probably OK for the next few months.
 	 */
 	si_meminfo(&si);
 	request->num_mtt =
 		roundup_pow_of_two(max_t(unsigned, request->num_mtt,
 					 min(1UL << (31 - log_mtts_per_seg),
 					     si.totalram >> (log_mtts_per_seg - 1))));

 	profile[MLX4_RES_QP].size     = dev_cap->qpc_entry_sz;
 	profile[MLX4_RES_RDMARC].size = dev_cap->rdmarc_entry_sz;
 	profile[MLX4_RES_ALTC].size   = dev_cap->altc_entry_sz;
 	profile[MLX4_RES_AUXC].size   = dev_cap->aux_entry_sz;
 	profile[MLX4_RES_SRQ].size    = dev_cap->srq_entry_sz;
 	profile[MLX4_RES_CQ].size     = dev_cap->cqc_entry_sz;
 	profile[MLX4_RES_EQ].size     = dev_cap->eqc_entry_sz;
 	profile[MLX4_RES_DMPT].size   = dev_cap->dmpt_entry_sz;
 	profile[MLX4_RES_CMPT].size   = dev_cap->cmpt_entry_sz;
 	profile[MLX4_RES_MTT].size    = dev_cap->mtt_entry_sz;
 	profile[MLX4_RES_MCG].size    = mlx4_get_mgm_entry_size(dev);

 	profile[MLX4_RES_QP].num      = request->num_qp;
 	profile[MLX4_RES_RDMARC].num  = request->num_qp * request->rdmarc_per_qp;
 	profile[MLX4_RES_ALTC].num    = request->num_qp;
 	profile[MLX4_RES_AUXC].num    = request->num_qp;
 	profile[MLX4_RES_SRQ].num     = request->num_srq;
 	profile[MLX4_RES_CQ].num      = request->num_cq;
 	profile[MLX4_RES_EQ].num      = mlx4_is_mfunc(dev) ?
 					dev->phys_caps.num_phys_eqs :
 					min_t(unsigned, dev_cap->max_eqs, MAX_MSIX);
 	profile[MLX4_RES_DMPT].num    = request->num_mpt;
 	profile[MLX4_RES_CMPT].num    = MLX4_NUM_CMPTS;
 	profile[MLX4_RES_MTT].num     = request->num_mtt * (1 << log_mtts_per_seg);
 	profile[MLX4_RES_MCG].num     = request->num_mcg;

 	for (i = 0; i < MLX4_RES_NUM; ++i) {
 		profile[i].type     = i;
 		profile[i].num      = roundup_pow_of_two(profile[i].num);
 		profile[i].log_num  = ilog2(profile[i].num);
 		profile[i].size    *= profile[i].num;
 		profile[i].size     = max(profile[i].size, (u64) PAGE_SIZE);
 	}

 	/*
 	 * Sort the resources in decreasing order of size.  Since they
 	 * all have sizes that are powers of 2, we'll be able to keep
 	 * resources aligned to their size and pack them without gaps
 	 * using the sorted order.
 	 */
 	for (i = MLX4_RES_NUM; i > 0; --i)
 		for (j = 1; j < i; ++j) {
 			if (profile[j].size > profile[j - 1].size) {
 				tmp	       = profile[j];
 				profile[j]     = profile[j - 1];
 				profile[j - 1] = tmp;
 			}
 		}

 	for (i = 0; i < MLX4_RES_NUM; ++i) {
 		if (profile[i].size) {
 			profile[i].start = total_size;
 			total_size	+= profile[i].size;
 		}

 		if (total_size > dev_cap->max_icm_sz) {
 			mlx4_err(dev, "Profile requires 0x%llx bytes; "
 				  "won't fit in 0x%llx bytes of context memory.\n",
 				  (unsigned long long) total_size,
 				  (unsigned long long) dev_cap->max_icm_sz);
 			kfree(profile);
 			return -ENOMEM;
 		}

 		if (profile[i].size)
 			mlx4_dbg(dev, "  profile[%2d] (%6s): 2^%02d entries @ 0x%10llx, "
 				  "size 0x%10llx\n",
 				 i, res_name[profile[i].type], profile[i].log_num,
 				 (unsigned long long) profile[i].start,
 				 (unsigned long long) profile[i].size);
 	}

 	mlx4_dbg(dev, "HCA context memory: reserving %d KB\n",
 		 (int) (total_size >> 10));

 	for (i = 0; i < MLX4_RES_NUM; ++i) {
 		switch (profile[i].type) {
 		case MLX4_RES_QP:
 			dev->caps.num_qps     = profile[i].num;
 			init_hca->qpc_base    = profile[i].start;
 			init_hca->log_num_qps = profile[i].log_num;
 			break;
 		case MLX4_RES_RDMARC:
 			for (priv->qp_table.rdmarc_shift = 0;
 			     request->num_qp << priv->qp_table.rdmarc_shift < profile[i].num;
 			     ++priv->qp_table.rdmarc_shift)
 				; /* nothing */
 			dev->caps.max_qp_dest_rdma = 1 << priv->qp_table.rdmarc_shift;
 			priv->qp_table.rdmarc_base   = (u32) profile[i].start;
 			init_hca->rdmarc_base	     = profile[i].start;
 			init_hca->log_rd_per_qp	     = priv->qp_table.rdmarc_shift;
 			break;
 		case MLX4_RES_ALTC:
 			init_hca->altc_base = profile[i].start;
 			break;
 		case MLX4_RES_AUXC:
 			init_hca->auxc_base = profile[i].start;
 			break;
 		case MLX4_RES_SRQ:
 			dev->caps.num_srqs     = profile[i].num;
 			init_hca->srqc_base    = profile[i].start;
 			init_hca->log_num_srqs = profile[i].log_num;
 			break;
 		case MLX4_RES_CQ:
 			dev->caps.num_cqs     = profile[i].num;
 			init_hca->cqc_base    = profile[i].start;
 			init_hca->log_num_cqs = profile[i].log_num;
 			break;
 		case MLX4_RES_EQ:
 			dev->caps.num_eqs     = roundup_pow_of_two(min_t(unsigned, dev_cap->max_eqs,
 									 MAX_MSIX));
 			init_hca->eqc_base    = profile[i].start;
 			init_hca->log_num_eqs = ilog2(dev->caps.num_eqs);
 			break;
 		case MLX4_RES_DMPT:
 			dev->caps.num_mpts	= profile[i].num;
 			priv->mr_table.mpt_base = profile[i].start;
 			init_hca->dmpt_base	= profile[i].start;
 			init_hca->log_mpt_sz	= profile[i].log_num;
 			break;
 		case MLX4_RES_CMPT:
 			init_hca->cmpt_base	 = profile[i].start;
 			break;
 		case MLX4_RES_MTT:
 			dev->caps.num_mtts	 = profile[i].num;
 			priv->mr_table.mtt_base	 = profile[i].start;
 			init_hca->mtt_base	 = profile[i].start;
 			break;
 		case MLX4_RES_MCG:
 			init_hca->mc_base	  = profile[i].start;
 			init_hca->log_mc_entry_sz =
 					ilog2(mlx4_get_mgm_entry_size(dev));
 			init_hca->log_mc_table_sz = profile[i].log_num;
 			if (dev->caps.steering_mode ==
 			    MLX4_STEERING_MODE_DEVICE_MANAGED) {
 				dev->caps.num_mgms = profile[i].num;
 			} else {
 				init_hca->log_mc_hash_sz =
 						profile[i].log_num - 1;
 				dev->caps.num_mgms = profile[i].num >> 1;
 				dev->caps.num_amgms = profile[i].num >> 1;
 			}
 			break;
 		default:
 			break;
 		}
 	}

 	/*
 	 * PDs don't take any HCA memory, but we assign them as part
 	 * of the HCA profile anyway.
 	 */
 	dev->caps.num_pds = MLX4_NUM_PDS;

 	kfree(profile);
 	return total_size;
 }
	/*
	* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
	* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
	* Copyright (c) 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 <linux/slab.h>

	#include "mlx4.h"
	#include "fw.h"

	enum {
	MLX4_RES_QP,
	MLX4_RES_RDMARC,
	MLX4_RES_ALTC,
	MLX4_RES_AUXC,
	MLX4_RES_SRQ,
	MLX4_RES_CQ,
	MLX4_RES_EQ,
	MLX4_RES_DMPT,
	MLX4_RES_CMPT,
	MLX4_RES_MTT,
	MLX4_RES_MCG,
	MLX4_RES_NUM
	};

	static const char *res_name[] = {
	[MLX4_RES_QP] = "QP",
	[MLX4_RES_RDMARC] = "RDMARC",
	[MLX4_RES_ALTC] = "ALTC",
	[MLX4_RES_AUXC] = "AUXC",
	[MLX4_RES_SRQ] = "SRQ",
	[MLX4_RES_CQ] = "CQ",
	[MLX4_RES_EQ] = "EQ",
	[MLX4_RES_DMPT] = "DMPT",
	[MLX4_RES_CMPT] = "CMPT",
	[MLX4_RES_MTT] = "MTT",
	[MLX4_RES_MCG] = "MCG",
	};

	u64 mlx4_make_profile(struct mlx4_dev *dev,
	struct mlx4_profile *request,
	struct mlx4_dev_cap *dev_cap,
	struct mlx4_init_hca_param *init_hca)
	{
	struct mlx4_priv *priv = mlx4_priv(dev);
	struct mlx4_resource {
	u64 size;
	u64 start;
	int type;
	u32 num;
	int log_num;
	};

	u64 total_size = 0;
	struct mlx4_resource *profile;
	struct mlx4_resource tmp;
	struct sysinfo si;
	int i, j;

	profile = kcalloc(MLX4_RES_NUM, sizeof(*profile), GFP_KERNEL);
	if (!profile)
	return -ENOMEM;

	/*
	* We want to scale the number of MTTs with the size of the
	* system memory, since it makes sense to register a lot of
	* memory on a system with a lot of memory. As a heuristic,
	* make sure we have enough MTTs to cover twice the system
	* memory (with PAGE_SIZE entries).
	*
	* This number has to be a power of two and fit into 32 bits
	* due to device limitations, so cap this at 2^31 as well.
	* That limits us to 8TB of memory registration per HCA with
	* 4KB pages, which is probably OK for the next few months.
	*/
	si_meminfo(&si);
	request->num_mtt =
	roundup_pow_of_two(max_t(unsigned, request->num_mtt,
	min(1UL << (31 - log_mtts_per_seg),
	si.totalram >> (log_mtts_per_seg - 1))));

	profile[MLX4_RES_QP].size = dev_cap->qpc_entry_sz;
	profile[MLX4_RES_RDMARC].size = dev_cap->rdmarc_entry_sz;
	profile[MLX4_RES_ALTC].size = dev_cap->altc_entry_sz;
	profile[MLX4_RES_AUXC].size = dev_cap->aux_entry_sz;
	profile[MLX4_RES_SRQ].size = dev_cap->srq_entry_sz;
	profile[MLX4_RES_CQ].size = dev_cap->cqc_entry_sz;
	profile[MLX4_RES_EQ].size = dev_cap->eqc_entry_sz;
	profile[MLX4_RES_DMPT].size = dev_cap->dmpt_entry_sz;
	profile[MLX4_RES_CMPT].size = dev_cap->cmpt_entry_sz;
	profile[MLX4_RES_MTT].size = dev_cap->mtt_entry_sz;
	profile[MLX4_RES_MCG].size = mlx4_get_mgm_entry_size(dev);

	profile[MLX4_RES_QP].num = request->num_qp;
	profile[MLX4_RES_RDMARC].num = request->num_qp * request->rdmarc_per_qp;
	profile[MLX4_RES_ALTC].num = request->num_qp;
	profile[MLX4_RES_AUXC].num = request->num_qp;
	profile[MLX4_RES_SRQ].num = request->num_srq;
	profile[MLX4_RES_CQ].num = request->num_cq;
	profile[MLX4_RES_EQ].num = mlx4_is_mfunc(dev) ?
	dev->phys_caps.num_phys_eqs :
	min_t(unsigned, dev_cap->max_eqs, MAX_MSIX);
	profile[MLX4_RES_DMPT].num = request->num_mpt;
	profile[MLX4_RES_CMPT].num = MLX4_NUM_CMPTS;
	profile[MLX4_RES_MTT].num = request->num_mtt * (1 << log_mtts_per_seg);
	profile[MLX4_RES_MCG].num = request->num_mcg;

	for (i = 0; i < MLX4_RES_NUM; ++i) {
	profile[i].type = i;
	profile[i].num = roundup_pow_of_two(profile[i].num);
	profile[i].log_num = ilog2(profile[i].num);
	profile[i].size *= profile[i].num;
	profile[i].size = max(profile[i].size, (u64) PAGE_SIZE);
	}

	/*
	* Sort the resources in decreasing order of size. Since they
	* all have sizes that are powers of 2, we'll be able to keep
	* resources aligned to their size and pack them without gaps
	* using the sorted order.
	*/
	for (i = MLX4_RES_NUM; i > 0; --i)
	for (j = 1; j < i; ++j) {
	if (profile[j].size > profile[j - 1].size) {
	tmp = profile[j];
	profile[j] = profile[j - 1];
	profile[j - 1] = tmp;
	}
	}

	for (i = 0; i < MLX4_RES_NUM; ++i) {
	if (profile[i].size) {
	profile[i].start = total_size;
	total_size += profile[i].size;
	}

	if (total_size > dev_cap->max_icm_sz) {
	mlx4_err(dev, "Profile requires 0x%llx bytes; "
	"won't fit in 0x%llx bytes of context memory.\n",
	(unsigned long long) total_size,
	(unsigned long long) dev_cap->max_icm_sz);
	kfree(profile);
	return -ENOMEM;
	}

	if (profile[i].size)
	mlx4_dbg(dev, " profile[%2d] (%6s): 2^%02d entries @ 0x%10llx, "
	"size 0x%10llx\n",
	i, res_name[profile[i].type], profile[i].log_num,
	(unsigned long long) profile[i].start,
	(unsigned long long) profile[i].size);
	}

	mlx4_dbg(dev, "HCA context memory: reserving %d KB\n",
	(int) (total_size >> 10));

	for (i = 0; i < MLX4_RES_NUM; ++i) {
	switch (profile[i].type) {
	case MLX4_RES_QP:
	dev->caps.num_qps = profile[i].num;
	init_hca->qpc_base = profile[i].start;
	init_hca->log_num_qps = profile[i].log_num;
	break;
	case MLX4_RES_RDMARC:
	for (priv->qp_table.rdmarc_shift = 0;
	request->num_qp << priv->qp_table.rdmarc_shift < profile[i].num;
	++priv->qp_table.rdmarc_shift)
	; /* nothing */
	dev->caps.max_qp_dest_rdma = 1 << priv->qp_table.rdmarc_shift;
	priv->qp_table.rdmarc_base = (u32) profile[i].start;
	init_hca->rdmarc_base = profile[i].start;
	init_hca->log_rd_per_qp = priv->qp_table.rdmarc_shift;
	break;
	case MLX4_RES_ALTC:
	init_hca->altc_base = profile[i].start;
	break;
	case MLX4_RES_AUXC:
	init_hca->auxc_base = profile[i].start;
	break;
	case MLX4_RES_SRQ:
	dev->caps.num_srqs = profile[i].num;
	init_hca->srqc_base = profile[i].start;
	init_hca->log_num_srqs = profile[i].log_num;
	break;
	case MLX4_RES_CQ:
	dev->caps.num_cqs = profile[i].num;
	init_hca->cqc_base = profile[i].start;
	init_hca->log_num_cqs = profile[i].log_num;
	break;
	case MLX4_RES_EQ:
	dev->caps.num_eqs = roundup_pow_of_two(min_t(unsigned, dev_cap->max_eqs,
	MAX_MSIX));
	init_hca->eqc_base = profile[i].start;
	init_hca->log_num_eqs = ilog2(dev->caps.num_eqs);
	break;
	case MLX4_RES_DMPT:
	dev->caps.num_mpts = profile[i].num;
	priv->mr_table.mpt_base = profile[i].start;
	init_hca->dmpt_base = profile[i].start;
	init_hca->log_mpt_sz = profile[i].log_num;
	break;
	case MLX4_RES_CMPT:
	init_hca->cmpt_base = profile[i].start;
	break;
	case MLX4_RES_MTT:
	dev->caps.num_mtts = profile[i].num;
	priv->mr_table.mtt_base = profile[i].start;
	init_hca->mtt_base = profile[i].start;
	break;
	case MLX4_RES_MCG:
	init_hca->mc_base = profile[i].start;
	init_hca->log_mc_entry_sz =
	ilog2(mlx4_get_mgm_entry_size(dev));
	init_hca->log_mc_table_sz = profile[i].log_num;
	if (dev->caps.steering_mode ==
	MLX4_STEERING_MODE_DEVICE_MANAGED) {
	dev->caps.num_mgms = profile[i].num;
	} else {
	init_hca->log_mc_hash_sz =
	profile[i].log_num - 1;
	dev->caps.num_mgms = profile[i].num >> 1;
	dev->caps.num_amgms = profile[i].num >> 1;
	}
	break;
	default:
	break;
	}
	}

	/*
	* PDs don't take any HCA memory, but we assign them as part
	* of the HCA profile anyway.
	*/
	dev->caps.num_pds = MLX4_NUM_PDS;

	kfree(profile);
	return total_size;
	}