[mirror_ubuntu-zesty-kernel.git] / 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/init.h>
#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);
}
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);
}

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->pdev, 2) /
				       dev->caps.uar_page_size);
	else
		offset = uar->index;
	uar->pfn = (pci_resource_start(dev->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);
}
EXPORT_SYMBOL_GPL(mlx4_uar_free);

int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf)
{
	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(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);
		if (!uar->bf_map) {
			err = -ENOMEM;
			goto unamp_uar;
		}
		uar->free_bf_bmap = 0;
		list_add(&uar->bf_list, &priv->bf_list);
	}

	bf->uar = uar;
	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)
{
	if (dev->caps.num_uars <= 128) {
		mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
			 dev->caps.num_uars);
		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);
}
Commit	Line	Data
225c7b1f RD	1	/*
	2	* Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
	3	* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
	4	*
	5	* This software is available to you under a choice of one of two
	6	* licenses. You may choose to be licensed under the terms of the GNU
	7	* General Public License (GPL) Version 2, available from the file
	8	* COPYING in the main directory of this source tree, or the
	9	* OpenIB.org BSD license below:
	10	*
	11	* Redistribution and use in source and binary forms, with or
	12	* without modification, are permitted provided that the following
	13	* conditions are met:
	14	*
	15	* - Redistributions of source code must retain the above
	16	* copyright notice, this list of conditions and the following
	17	* disclaimer.
	18	*
	19	* - Redistributions in binary form must reproduce the above
	20	* copyright notice, this list of conditions and the following
	21	* disclaimer in the documentation and/or other materials
	22	* provided with the distribution.
	23	*
	24	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	25	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	26	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	27	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	28	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	29	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	30	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	31	* SOFTWARE.
	32	*/
	33
f5311ac1	34	#include <linux/init.h>
225c7b1f	35	#include <linux/errno.h>
ee40fa06	36	#include <linux/export.h>
c1b43dca	37	#include <linux/io-mapping.h>
225c7b1f RD	38
	39	#include <asm/page.h>
	40
	41	#include "mlx4.h"
	42	#include "icm.h"
	43
9ace5e01 EC	44	enum {
	45	MLX4_NUM_RESERVED_UARS = 8
	46	};
	47
225c7b1f RD	48	int mlx4_pd_alloc(struct mlx4_dev dev, u32 pdn)
	49	{
	50	struct mlx4_priv *priv = mlx4_priv(dev);
	51
	52	*pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
	53	if (*pdn == -1)
	54	return -ENOMEM;
eb41049f	55
225c7b1f RD	56	return 0;
	57	}
	58	EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
	59
	60	void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
	61	{
	62	mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn);
	63	}
	64	EXPORT_SYMBOL_GPL(mlx4_pd_free);
	65
ba062d52	66	int __mlx4_xrcd_alloc(struct mlx4_dev dev, u32 xrcdn)
012a8ff5 SH	67	{
	68	struct mlx4_priv *priv = mlx4_priv(dev);
	69
	70	*xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap);
	71	if (*xrcdn == -1)
	72	return -ENOMEM;
	73
	74	return 0;
	75	}
ba062d52 JM	76
	77	int mlx4_xrcd_alloc(struct mlx4_dev dev, u32 xrcdn)
	78	{
	79	u64 out_param;
	80	int err;
	81
	82	if (mlx4_is_mfunc(dev)) {
	83	err = mlx4_cmd_imm(dev, 0, &out_param,
	84	RES_XRCD, RES_OP_RESERVE,
	85	MLX4_CMD_ALLOC_RES,
	86	MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
	87	if (err)
	88	return err;
	89
	90	*xrcdn = get_param_l(&out_param);
	91	return 0;
	92	}
	93	return __mlx4_xrcd_alloc(dev, xrcdn);
	94	}
012a8ff5 SH	95	EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc);
012a8ff5 SH	96
ba062d52	97	void __mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
012a8ff5 SH	98	{
	99	mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn);
	100	}
ba062d52 JM	101
	102	void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
	103	{
e7dbeba8	104	u64 in_param = 0;
ba062d52 JM	105	int err;
	106
	107	if (mlx4_is_mfunc(dev)) {
	108	set_param_l(&in_param, xrcdn);
	109	err = mlx4_cmd(dev, in_param, RES_XRCD,
	110	RES_OP_RESERVE, MLX4_CMD_FREE_RES,
	111	MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
	112	if (err)
	113	mlx4_warn(dev, "Failed to release xrcdn %d\n", xrcdn);
	114	} else
	115	__mlx4_xrcd_free(dev, xrcdn);
	116	}
012a8ff5 SH	117	EXPORT_SYMBOL_GPL(mlx4_xrcd_free);
012a8ff5 SH	118
3d73c288	119	int mlx4_init_pd_table(struct mlx4_dev *dev)
225c7b1f RD	120	{
	121	struct mlx4_priv *priv = mlx4_priv(dev);
	122
	123	return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
f5311ac1 JM	124	(1 << NOT_MASKED_PD_BITS) - 1,
f5311ac1 JM	125	dev->caps.reserved_pds, 0);
225c7b1f RD	126	}
	127
	128	void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
	129	{
	130	mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
	131	}
	132
012a8ff5 SH	133	int mlx4_init_xrcd_table(struct mlx4_dev *dev)
	134	{
	135	struct mlx4_priv *priv = mlx4_priv(dev);
	136
	137	return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16),
	138	(1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0);
	139	}
	140
	141	void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev)
	142	{
	143	mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap);
	144	}
225c7b1f RD	145
	146	int mlx4_uar_alloc(struct mlx4_dev dev, struct mlx4_uar uar)
	147	{
f5311ac1 JM	148	int offset;
f5311ac1 JM	149
225c7b1f RD	150	uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
	151	if (uar->index == -1)
	152	return -ENOMEM;
	153
f5311ac1 JM	154	if (mlx4_is_slave(dev))
	155	offset = uar->index % ((int) pci_resource_len(dev->pdev, 2) /
	156	dev->caps.uar_page_size);
	157	else
	158	offset = uar->index;
	159	uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + offset;
c1b43dca	160	uar->map = NULL;
225c7b1f RD	161	return 0;
	162	}
	163	EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
	164
	165	void mlx4_uar_free(struct mlx4_dev dev, struct mlx4_uar uar)
	166	{
	167	mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index);
	168	}
	169	EXPORT_SYMBOL_GPL(mlx4_uar_free);
	170
c1b43dca EC	171	int mlx4_bf_alloc(struct mlx4_dev dev, struct mlx4_bf bf)
	172	{
	173	struct mlx4_priv *priv = mlx4_priv(dev);
	174	struct mlx4_uar *uar;
	175	int err = 0;
	176	int idx;
	177
	178	if (!priv->bf_mapping)
	179	return -ENOMEM;
	180
	181	mutex_lock(&priv->bf_mutex);
	182	if (!list_empty(&priv->bf_list))
	183	uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list);
	184	else {
9ace5e01 EC	185	if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) {
	186	err = -ENOMEM;
	187	goto out;
	188	}
c1b43dca EC	189	uar = kmalloc(sizeof *uar, GFP_KERNEL);
	190	if (!uar) {
	191	err = -ENOMEM;
	192	goto out;
	193	}
	194	err = mlx4_uar_alloc(dev, uar);
	195	if (err)
	196	goto free_kmalloc;
	197
	198	uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE);
	199	if (!uar->map) {
	200	err = -ENOMEM;
	201	goto free_uar;
	202	}
	203
	204	uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT);
	205	if (!uar->bf_map) {
	206	err = -ENOMEM;
	207	goto unamp_uar;
	208	}
	209	uar->free_bf_bmap = 0;
	210	list_add(&uar->bf_list, &priv->bf_list);
	211	}
	212
	213	bf->uar = uar;
	214	idx = ffz(uar->free_bf_bmap);
	215	uar->free_bf_bmap \|= 1 << idx;
	216	bf->uar = uar;
	217	bf->offset = 0;
	218	bf->buf_size = dev->caps.bf_reg_size / 2;
	219	bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size;
	220	if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1)
	221	list_del_init(&uar->bf_list);
	222
	223	goto out;
	224
	225	unamp_uar:
	226	bf->uar = NULL;
	227	iounmap(uar->map);
	228
	229	free_uar:
	230	mlx4_uar_free(dev, uar);
	231
	232	free_kmalloc:
	233	kfree(uar);
	234
	235	out:
	236	mutex_unlock(&priv->bf_mutex);
	237	return err;
	238	}
	239	EXPORT_SYMBOL_GPL(mlx4_bf_alloc);
	240
	241	void mlx4_bf_free(struct mlx4_dev dev, struct mlx4_bf bf)
	242	{
	243	struct mlx4_priv *priv = mlx4_priv(dev);
	244	int idx;
	245
	246	if (!bf->uar \|\| !bf->uar->bf_map)
	247	return;
	248
	249	mutex_lock(&priv->bf_mutex);
	250	idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size;
	251	bf->uar->free_bf_bmap &= ~(1 << idx);
	252	if (!bf->uar->free_bf_bmap) {
253	if (!list_empty(&bf->uar->bf_list))
254	list_del(&bf->uar->bf_list);
255
256	io_mapping_unmap(bf->uar->bf_map);
257	iounmap(bf->uar->map);
258	mlx4_uar_free(dev, bf->uar);
259	kfree(bf->uar);
260	} else if (list_empty(&bf->uar->bf_list))
261	list_add(&bf->uar->bf_list, &priv->bf_list);
262
263	mutex_unlock(&priv->bf_mutex);
264	}
265	EXPORT_SYMBOL_GPL(mlx4_bf_free);
266
225c7b1f RD	267	int mlx4_init_uar_table(struct mlx4_dev *dev)
225c7b1f RD	268	{
76442640 RD	269	if (dev->caps.num_uars <= 128) {
	270	mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
	271	dev->caps.num_uars);
	272	mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
	273	return -ENODEV;
	274	}
	275
225c7b1f RD	276	return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
225c7b1f RD	277	dev->caps.num_uars, dev->caps.num_uars - 1,
f5311ac1	278	dev->caps.reserved_uars, 0);
225c7b1f RD	279	}
	280
	281	void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
	282	{
	283	mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);
	284	}