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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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225c7b1fee
Add an InfiniBand driver for Mellanox ConnectX adapters. Because
these adapters can also be used as ethernet NICs and Fibre Channel
HBAs, the driver is split into two modules:
mlx4_core: Handles low-level things like device initialization and
processing firmware commands. Also controls resource allocation
so that the InfiniBand, ethernet and FC functions can share a
device without stepping on each other.
mlx4_ib: Handles InfiniBand-specific things; plugs into the
InfiniBand midlayer.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
/*
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* Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <asm/page.h>
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#include "mlx4.h"
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#include "icm.h"
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int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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*pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
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if (*pdn == -1)
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return -ENOMEM;
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return 0;
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}
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EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
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void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
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{
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mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn);
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}
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EXPORT_SYMBOL_GPL(mlx4_pd_free);
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int __devinit mlx4_init_pd_table(struct mlx4_dev *dev)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
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(1 << 24) - 1, dev->caps.reserved_pds);
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}
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void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
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{
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mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
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}
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int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)
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{
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uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
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if (uar->index == -1)
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return -ENOMEM;
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uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + uar->index;
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return 0;
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}
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EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
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void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)
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{
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mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index);
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}
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EXPORT_SYMBOL_GPL(mlx4_uar_free);
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int mlx4_init_uar_table(struct mlx4_dev *dev)
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{
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return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
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dev->caps.num_uars, dev->caps.num_uars - 1,
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max(128, dev->caps.reserved_uars));
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}
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void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
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{
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mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);
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}
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