cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/ethernet/mellanox/mlx4/pd.c

/*
 * Copyright (c) 2006, 2007 Cisco Systems, Inc.  All rights reserved.
 * Copyright (c) 2005 Mellanox Technologies. 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/errno.h>
#include <linux/export.h>
#include <linux/io-mapping.h>

#include <asm/page.h>

#include "mlx4.h"
#include "icm.h"

enum {
	
MLX4_NUM_RESERVED_UARS = 8
};


int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn) { struct mlx4_priv *priv = mlx4_priv(dev); *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap); if (*pdn == -1) return -ENOMEM; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier50100.00%1100.00%
Total50100.00%1100.00%

EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn) { mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn, MLX4_USE_RR); }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier2692.86%150.00%
Jack Morgenstein27.14%150.00%
Total28100.00%2100.00%

EXPORT_SYMBOL_GPL(mlx4_pd_free);
int __mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn) { struct mlx4_priv *priv = mlx4_priv(dev); *xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap); if (*xrcdn == -1) return -ENOMEM; return 0; }

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PersonTokensPropCommitsCommitProp
Sean Hefty4998.00%150.00%
Jack Morgenstein12.00%150.00%
Total50100.00%2100.00%


int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn) { u64 out_param; int err; if (mlx4_is_mfunc(dev)) { err = mlx4_cmd_imm(dev, 0, &out_param, RES_XRCD, RES_OP_RESERVE, MLX4_CMD_ALLOC_RES, MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); if (err) return err; *xrcdn = get_param_l(&out_param); return 0; } return __mlx4_xrcd_alloc(dev, xrcdn); }

Contributors

PersonTokensPropCommitsCommitProp
Jack Morgenstein78100.00%1100.00%
Total78100.00%1100.00%

EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc);
void __mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn) { mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn, MLX4_USE_RR); }

Contributors

PersonTokensPropCommitsCommitProp
Sean Hefty2589.29%133.33%
Jack Morgenstein310.71%266.67%
Total28100.00%3100.00%


void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn) { u64 in_param = 0; int err; if (mlx4_is_mfunc(dev)) { set_param_l(&in_param, xrcdn); err = mlx4_cmd(dev, in_param, RES_XRCD, RES_OP_RESERVE, MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); if (err) mlx4_warn(dev, "Failed to release xrcdn %d\n", xrcdn); } else __mlx4_xrcd_free(dev, xrcdn); }

Contributors

PersonTokensPropCommitsCommitProp
Jack Morgenstein78100.00%2100.00%
Total78100.00%2100.00%

EXPORT_SYMBOL_GPL(mlx4_xrcd_free);
int mlx4_init_pd_table(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds, (1 << NOT_MASKED_PD_BITS) - 1, dev->caps.reserved_pds, 0); }

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PersonTokensPropCommitsCommitProp
Roland Dreier4894.12%133.33%
Yevgeny Petrilin23.92%133.33%
Jack Morgenstein11.96%133.33%
Total51100.00%3100.00%


void mlx4_cleanup_pd_table(struct mlx4_dev *dev) { mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap); }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier21100.00%1100.00%
Total21100.00%1100.00%


int mlx4_init_xrcd_table(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16), (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Sean Hefty53100.00%1100.00%
Total53100.00%1100.00%


void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev) { mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap); }

Contributors

PersonTokensPropCommitsCommitProp
Sean Hefty21100.00%1100.00%
Total21100.00%1100.00%


int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar) { int offset; uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap); if (uar->index == -1) return -ENOMEM; if (mlx4_is_slave(dev)) offset = uar->index % ((int)pci_resource_len(dev->persist->pdev, 2) / dev->caps.uar_page_size); else offset = uar->index; uar->pfn = (pci_resource_start(dev->persist->pdev, 2) >> PAGE_SHIFT) + offset; uar->map = NULL; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier6655.00%125.00%
Jack Morgenstein4436.67%125.00%
Eli Cohen65.00%125.00%
Yishai Hadas43.33%125.00%
Total120100.00%4100.00%

EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar) { mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index, MLX4_USE_RR); }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier3294.12%150.00%
Jack Morgenstein25.88%150.00%
Total34100.00%2100.00%

EXPORT_SYMBOL_GPL(mlx4_uar_free);
int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf, int node) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_uar *uar; int err = 0; int idx; if (!priv->bf_mapping) return -ENOMEM; mutex_lock(&priv->bf_mutex); if (!list_empty(&priv->bf_list)) uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list); else { if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) { err = -ENOMEM; goto out; } uar = kmalloc_node(sizeof(*uar), GFP_KERNEL, node); if (!uar) { uar = kmalloc(sizeof(*uar), GFP_KERNEL); if (!uar) { err = -ENOMEM; goto out; } } err = mlx4_uar_alloc(dev, uar); if (err) goto free_kmalloc; uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE); if (!uar->map) { err = -ENOMEM; goto free_uar; } uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT, PAGE_SIZE); if (!uar->bf_map) { err = -ENOMEM; goto unamp_uar; } uar->free_bf_bmap = 0; list_add(&uar->bf_list, &priv->bf_list); } idx = ffz(uar->free_bf_bmap); uar->free_bf_bmap |= 1 << idx; bf->uar = uar; bf->offset = 0; bf->buf_size = dev->caps.bf_reg_size / 2; bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size; if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1) list_del_init(&uar->bf_list); goto out; unamp_uar: bf->uar = NULL; iounmap(uar->map); free_uar: mlx4_uar_free(dev, uar); free_kmalloc: kfree(uar); out: mutex_unlock(&priv->bf_mutex); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Eli Cohen36792.44%250.00%
Eugenia Emantayev287.05%125.00%
Chris Wilson20.50%125.00%
Total397100.00%4100.00%

EXPORT_SYMBOL_GPL(mlx4_bf_alloc);
void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf) { struct mlx4_priv *priv = mlx4_priv(dev); int idx; if (!bf->uar || !bf->uar->bf_map) return; mutex_lock(&priv->bf_mutex); idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size; bf->uar->free_bf_bmap &= ~(1 << idx); if (!bf->uar->free_bf_bmap) { if (!list_empty(&bf->uar->bf_list)) list_del(&bf->uar->bf_list); io_mapping_unmap(bf->uar->bf_map); iounmap(bf->uar->map); mlx4_uar_free(dev, bf->uar); kfree(bf->uar); } else if (list_empty(&bf->uar->bf_list)) list_add(&bf->uar->bf_list, &priv->bf_list); mutex_unlock(&priv->bf_mutex); }

Contributors

PersonTokensPropCommitsCommitProp
Eli Cohen188100.00%1100.00%
Total188100.00%1100.00%

EXPORT_SYMBOL_GPL(mlx4_bf_free);
int mlx4_init_uar_table(struct mlx4_dev *dev) { int num_reserved_uar = mlx4_get_num_reserved_uar(dev); mlx4_dbg(dev, "uar_page_shift = %d", dev->uar_page_shift); mlx4_dbg(dev, "Effective reserved_uars=%d", dev->caps.reserved_uars); if (dev->caps.num_uars <= num_reserved_uar) { mlx4_err( dev, "Only %d UAR pages (need more than %d)\n", dev->caps.num_uars, num_reserved_uar); mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n"); return -ENODEV; } return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap, dev->caps.num_uars, dev->caps.num_uars - 1, dev->caps.reserved_uars, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier7867.24%250.00%
Huy Nguyen3631.03%125.00%
Yevgeny Petrilin21.72%125.00%
Total116100.00%4100.00%


void mlx4_cleanup_uar_table(struct mlx4_dev *dev) { mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap); }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier23100.00%1100.00%
Total23100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Eli Cohen58141.44%213.33%
Roland Dreier37726.89%213.33%
Jack Morgenstein20914.91%426.67%
Sean Hefty15811.27%16.67%
Huy Nguyen362.57%16.67%
Eugenia Emantayev282.00%16.67%
Yevgeny Petrilin40.29%16.67%
Yishai Hadas40.29%16.67%
Paul Gortmaker30.21%16.67%
Chris Wilson20.14%16.67%
Total1402100.00%15100.00%
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