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295 lines
7.3 KiB
295 lines
7.3 KiB
/* |
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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/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, MLX4_USE_RR); |
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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, MLX4_USE_RR); |
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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 = 0; |
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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->persist->pdev, |
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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->persist->pdev, 2) >> PAGE_SHIFT) |
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+ 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, MLX4_USE_RR); |
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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, int node) |
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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_node(sizeof(*uar), GFP_KERNEL, node); |
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if (!uar) { |
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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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} |
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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, |
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uar->index << PAGE_SHIFT, |
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PAGE_SIZE); |
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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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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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int num_reserved_uar = mlx4_get_num_reserved_uar(dev); |
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mlx4_dbg(dev, "uar_page_shift = %d", dev->uar_page_shift); |
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mlx4_dbg(dev, "Effective reserved_uars=%d", dev->caps.reserved_uars); |
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if (dev->caps.num_uars <= num_reserved_uar) { |
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mlx4_err( |
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dev, "Only %d UAR pages (need more than %d)\n", |
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dev->caps.num_uars, num_reserved_uar); |
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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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