drivers/net/ethernet/mellanox/mlx4/pd.c - linux - Git at Google

 /*
  * 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;
 }
 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);
 }
 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;
 }

 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);
 }
 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);
 }

 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);
 }
 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);
 }

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

 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);
 }

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

 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;
 }
 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);
 }
 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;
 }
 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);
 }
 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);
 }

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

	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);
	}
	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);
	}

	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);
	}
	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);
	}

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

	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);
	}

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

	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;
	}
	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);
	}
	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;
	}
	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);
	}
	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);
	}

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