285 lines
7.0 KiB
C
285 lines
7.0 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 <linux/export.h>
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#include <linux/io-mapping.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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enum {
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MLX4_NUM_RESERVED_UARS = 8
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};
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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 __mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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*xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap);
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if (*xrcdn == -1)
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return -ENOMEM;
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return 0;
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}
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int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)
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{
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u64 out_param;
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int err;
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if (mlx4_is_mfunc(dev)) {
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err = mlx4_cmd_imm(dev, 0, &out_param,
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RES_XRCD, RES_OP_RESERVE,
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MLX4_CMD_ALLOC_RES,
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MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
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if (err)
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return err;
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*xrcdn = get_param_l(&out_param);
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return 0;
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}
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return __mlx4_xrcd_alloc(dev, xrcdn);
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}
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EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc);
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void __mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
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{
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mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn);
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}
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void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
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{
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u64 in_param;
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int err;
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if (mlx4_is_mfunc(dev)) {
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set_param_l(&in_param, xrcdn);
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err = mlx4_cmd(dev, in_param, RES_XRCD,
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RES_OP_RESERVE, MLX4_CMD_FREE_RES,
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MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
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if (err)
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mlx4_warn(dev, "Failed to release xrcdn %d\n", xrcdn);
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} else
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__mlx4_xrcd_free(dev, xrcdn);
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}
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EXPORT_SYMBOL_GPL(mlx4_xrcd_free);
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int 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 << NOT_MASKED_PD_BITS) - 1,
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dev->caps.reserved_pds, 0);
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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_init_xrcd_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->xrcd_bitmap, (1 << 16),
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(1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0);
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}
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void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev)
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{
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mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_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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int offset;
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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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if (mlx4_is_slave(dev))
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offset = uar->index % ((int) pci_resource_len(dev->pdev, 2) /
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dev->caps.uar_page_size);
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else
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offset = uar->index;
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uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + offset;
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uar->map = NULL;
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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_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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struct mlx4_uar *uar;
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int err = 0;
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int idx;
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if (!priv->bf_mapping)
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return -ENOMEM;
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mutex_lock(&priv->bf_mutex);
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if (!list_empty(&priv->bf_list))
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uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list);
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else {
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if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) {
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err = -ENOMEM;
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goto out;
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}
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uar = kmalloc(sizeof *uar, GFP_KERNEL);
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if (!uar) {
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err = -ENOMEM;
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goto out;
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}
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err = mlx4_uar_alloc(dev, uar);
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if (err)
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goto free_kmalloc;
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uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE);
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if (!uar->map) {
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err = -ENOMEM;
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goto free_uar;
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}
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uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT);
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if (!uar->bf_map) {
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err = -ENOMEM;
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goto unamp_uar;
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}
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uar->free_bf_bmap = 0;
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list_add(&uar->bf_list, &priv->bf_list);
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}
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bf->uar = uar;
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idx = ffz(uar->free_bf_bmap);
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uar->free_bf_bmap |= 1 << idx;
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bf->uar = uar;
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bf->offset = 0;
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bf->buf_size = dev->caps.bf_reg_size / 2;
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bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size;
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if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1)
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list_del_init(&uar->bf_list);
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goto out;
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unamp_uar:
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bf->uar = NULL;
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iounmap(uar->map);
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free_uar:
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mlx4_uar_free(dev, uar);
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free_kmalloc:
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kfree(uar);
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out:
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mutex_unlock(&priv->bf_mutex);
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return err;
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}
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EXPORT_SYMBOL_GPL(mlx4_bf_alloc);
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void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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int idx;
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if (!bf->uar || !bf->uar->bf_map)
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return;
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mutex_lock(&priv->bf_mutex);
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idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size;
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bf->uar->free_bf_bmap &= ~(1 << idx);
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if (!bf->uar->free_bf_bmap) {
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if (!list_empty(&bf->uar->bf_list))
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list_del(&bf->uar->bf_list);
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io_mapping_unmap(bf->uar->bf_map);
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iounmap(bf->uar->map);
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mlx4_uar_free(dev, bf->uar);
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kfree(bf->uar);
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} else if (list_empty(&bf->uar->bf_list))
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list_add(&bf->uar->bf_list, &priv->bf_list);
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mutex_unlock(&priv->bf_mutex);
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}
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EXPORT_SYMBOL_GPL(mlx4_bf_free);
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int mlx4_init_uar_table(struct mlx4_dev *dev)
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{
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if (dev->caps.num_uars <= 128) {
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mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
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dev->caps.num_uars);
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mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
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return -ENODEV;
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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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dev->caps.reserved_uars, 0);
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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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