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ab6bf42e23
linux-next/drivers/net/mlx4/profile.c
Eli Cohen ab6bf42e23 mlx4_core: Add module parameter for number of MTTs per segment 
The current MTT allocator uses kmalloc() to allocate a buffer for its
buddy allocator, and thus is limited in the amount of MTT segments
that it can control.  As a result, the size of memory that can be
registered is limited too.  This patch uses a module parameter to
control the number of MTT entries that each segment represents,
allowing more memory to be registered with the same number of
segments.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2009-05-27 14:38:34 -07:00

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/*
* 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/init.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;
int num;
int log_num;
};
u64 total_size = 0;
struct mlx4_resource *profile;
struct mlx4_resource tmp;
int i, j;
profile = kzalloc(MLX4_RES_NUM * sizeof *profile, GFP_KERNEL);
if (!profile)
return -ENOMEM;
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->caps.mtts_per_seg * dev_cap->mtt_entry_sz;
profile[MLX4_RES_MCG].size = MLX4_MGM_ENTRY_SIZE;
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 = min_t(unsigned, dev_cap->max_eqs,
dev_cap->reserved_eqs +
num_possible_cpus() + 1);
profile[MLX4_RES_DMPT].num = request->num_mpt;
profile[MLX4_RES_CMPT].num = MLX4_NUM_CMPTS;
profile[MLX4_RES_MTT].num = request->num_mtt;
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 = profile[i].num;
init_hca->eqc_base = profile[i].start;
init_hca->log_num_eqs = profile[i].log_num;
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_mtt_segs = profile[i].num;
priv->mr_table.mtt_base = profile[i].start;
init_hca->mtt_base = profile[i].start;
break;
case MLX4_RES_MCG:
dev->caps.num_mgms = profile[i].num >> 1;
dev->caps.num_amgms = profile[i].num >> 1;
init_hca->mc_base = profile[i].start;
init_hca->log_mc_entry_sz = ilog2(MLX4_MGM_ENTRY_SIZE);
init_hca->log_mc_table_sz = profile[i].log_num;
init_hca->log_mc_hash_sz = profile[i].log_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;
}
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