/*
|
* 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);
|
}
|
