Release 4.11 drivers/net/ethernet/mellanox/mlx5/core/alloc.c
/*
* Copyright (c) 2013-2015, 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/slab.h>
#include <linux/mm.h>
#include <linux/export.h>
#include <linux/bitmap.h>
#include <linux/dma-mapping.h>
#include <linux/vmalloc.h>
#include <linux/mlx5/driver.h>
#include "mlx5_core.h"
struct mlx5_db_pgdir {
struct list_head list;
unsigned long *bitmap;
__be32 *db_page;
dma_addr_t db_dma;
};
/* Handling for queue buffers -- we allocate a bunch of memory and
* register it in a memory region at HCA virtual address 0.
*/
static void *mlx5_dma_zalloc_coherent_node(struct mlx5_core_dev *dev,
size_t size, dma_addr_t *dma_handle,
int node)
{
struct mlx5_priv *priv = &dev->priv;
int original_node;
void *cpu_handle;
mutex_lock(&priv->alloc_mutex);
original_node = dev_to_node(&dev->pdev->dev);
set_dev_node(&dev->pdev->dev, node);
cpu_handle = dma_zalloc_coherent(&dev->pdev->dev, size,
dma_handle, GFP_KERNEL);
set_dev_node(&dev->pdev->dev, original_node);
mutex_unlock(&priv->alloc_mutex);
return cpu_handle;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Saeed Mahameed | 111 | 99.11% | 1 | 50.00% |
| Eli Cohen | 1 | 0.89% | 1 | 50.00% |
| Total | 112 | 100.00% | 2 | 100.00% |
int mlx5_buf_alloc_node(struct mlx5_core_dev *dev, int size,
struct mlx5_buf *buf, int node)
{
dma_addr_t t;
buf->size = size;
buf->npages = 1;
buf->page_shift = (u8)get_order(size) + PAGE_SHIFT;
buf->direct.buf = mlx5_dma_zalloc_coherent_node(dev, size,
&t, node);
if (!buf->direct.buf)
return -ENOMEM;
buf->direct.map = t;
while (t & ((1 << buf->page_shift) - 1)) {
--buf->page_shift;
buf->npages *= 2;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eli Cohen | 111 | 91.74% | 1 | 33.33% |
| Saeed Mahameed | 7 | 5.79% | 1 | 33.33% |
| Jack Morgenstein | 3 | 2.48% | 1 | 33.33% |
| Total | 121 | 100.00% | 3 | 100.00% |
int mlx5_buf_alloc(struct mlx5_core_dev *dev, int size, struct mlx5_buf *buf)
{
return mlx5_buf_alloc_node(dev, size, buf, dev->priv.numa_node);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Saeed Mahameed | 34 | 100.00% | 1 | 100.00% |
| Total | 34 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(mlx5_buf_alloc);
void mlx5_buf_free(struct mlx5_core_dev *dev, struct mlx5_buf *buf)
{
dma_free_coherent(&dev->pdev->dev, buf->size, buf->direct.buf,
buf->direct.map);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eli Cohen | 41 | 100.00% | 1 | 100.00% |
| Total | 41 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(mlx5_buf_free);
int mlx5_frag_buf_alloc_node(struct mlx5_core_dev *dev, int size,
struct mlx5_frag_buf *buf, int node)
{
int i;
buf->size = size;
buf->npages = 1 << get_order(size);
buf->page_shift = PAGE_SHIFT;
buf->frags = kcalloc(buf->npages, sizeof(struct mlx5_buf_list),
GFP_KERNEL);
if (!buf->frags)
goto err_out;
for (i = 0; i < buf->npages; i++) {
struct mlx5_buf_list *frag = &buf->frags[i];
int frag_sz = min_t(int, size, PAGE_SIZE);
frag->buf = mlx5_dma_zalloc_coherent_node(dev, frag_sz,
&frag->map, node);
if (!frag->buf)
goto err_free_buf;
if (frag->map & ((1 << buf->page_shift) - 1)) {
dma_free_coherent(&dev->pdev->dev, frag_sz,
buf->frags[i].buf, buf->frags[i].map);
mlx5_core_warn(dev, "unexpected map alignment: %pad, page_shift=%d\n",
&frag->map, buf->page_shift);
goto err_free_buf;
}
size -= frag_sz;
}
return 0;
err_free_buf:
while (i--)
dma_free_coherent(&dev->pdev->dev, PAGE_SIZE, buf->frags[i].buf,
buf->frags[i].map);
kfree(buf->frags);
err_out:
return -ENOMEM;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tariq Toukan | 270 | 99.26% | 1 | 50.00% |
| Arnd Bergmann | 2 | 0.74% | 1 | 50.00% |
| Total | 272 | 100.00% | 2 | 100.00% |
void mlx5_frag_buf_free(struct mlx5_core_dev *dev, struct mlx5_frag_buf *buf)
{
int size = buf->size;
int i;
for (i = 0; i < buf->npages; i++) {
int frag_sz = min_t(int, size, PAGE_SIZE);
dma_free_coherent(&dev->pdev->dev, frag_sz, buf->frags[i].buf,
buf->frags[i].map);
size -= frag_sz;
}
kfree(buf->frags);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tariq Toukan | 95 | 100.00% | 1 | 100.00% |
| Total | 95 | 100.00% | 1 | 100.00% |
static struct mlx5_db_pgdir *mlx5_alloc_db_pgdir(struct mlx5_core_dev *dev,
int node)
{
u32 db_per_page = PAGE_SIZE / cache_line_size();
struct mlx5_db_pgdir *pgdir;
pgdir = kzalloc(sizeof(*pgdir), GFP_KERNEL);
if (!pgdir)
return NULL;
pgdir->bitmap = kcalloc(BITS_TO_LONGS(db_per_page),
sizeof(unsigned long),
GFP_KERNEL);
if (!pgdir->bitmap) {
kfree(pgdir);
return NULL;
}
bitmap_fill(pgdir->bitmap, db_per_page);
pgdir->db_page = mlx5_dma_zalloc_coherent_node(dev, PAGE_SIZE,
&pgdir->db_dma, node);
if (!pgdir->db_page) {
kfree(pgdir->bitmap);
kfree(pgdir);
return NULL;
}
return pgdir;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eli Cohen | 80 | 56.74% | 1 | 33.33% |
| Daniel Jurgens | 53 | 37.59% | 1 | 33.33% |
| Saeed Mahameed | 8 | 5.67% | 1 | 33.33% |
| Total | 141 | 100.00% | 3 | 100.00% |
static int mlx5_alloc_db_from_pgdir(struct mlx5_db_pgdir *pgdir,
struct mlx5_db *db)
{
u32 db_per_page = PAGE_SIZE / cache_line_size();
int offset;
int i;
i = find_first_bit(pgdir->bitmap, db_per_page);
if (i >= db_per_page)
return -ENOMEM;
__clear_bit(i, pgdir->bitmap);
db->u.pgdir = pgdir;
db->index = i;
offset = db->index * cache_line_size();
db->db = pgdir->db_page + offset / sizeof(*pgdir->db_page);
db->dma = pgdir->db_dma + offset;
db->db[0] = 0;
db->db[1] = 0;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eli Cohen | 102 | 77.27% | 1 | 33.33% |
| Saeed Mahameed | 18 | 13.64% | 1 | 33.33% |
| Daniel Jurgens | 12 | 9.09% | 1 | 33.33% |
| Total | 132 | 100.00% | 3 | 100.00% |
int mlx5_db_alloc_node(struct mlx5_core_dev *dev, struct mlx5_db *db, int node)
{
struct mlx5_db_pgdir *pgdir;
int ret = 0;
mutex_lock(&dev->priv.pgdir_mutex);
list_for_each_entry(pgdir, &dev->priv.pgdir_list, list)
if (!mlx5_alloc_db_from_pgdir(pgdir, db))
goto out;
pgdir = mlx5_alloc_db_pgdir(dev, node);
if (!pgdir) {
ret = -ENOMEM;
goto out;
}
list_add(&pgdir->list, &dev->priv.pgdir_list);
/* This should never fail -- we just allocated an empty page: */
WARN_ON(mlx5_alloc_db_from_pgdir(pgdir, db));
out:
mutex_unlock(&dev->priv.pgdir_mutex);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eli Cohen | 118 | 95.16% | 1 | 50.00% |
| Saeed Mahameed | 6 | 4.84% | 1 | 50.00% |
| Total | 124 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(mlx5_db_alloc_node);
int mlx5_db_alloc(struct mlx5_core_dev *dev, struct mlx5_db *db)
{
return mlx5_db_alloc_node(dev, db, dev->priv.numa_node);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Saeed Mahameed | 29 | 100.00% | 1 | 100.00% |
| Total | 29 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(mlx5_db_alloc);
void mlx5_db_free(struct mlx5_core_dev *dev, struct mlx5_db *db)
{
u32 db_per_page = PAGE_SIZE / cache_line_size();
mutex_lock(&dev->priv.pgdir_mutex);
__set_bit(db->index, db->u.pgdir->bitmap);
if (bitmap_full(db->u.pgdir->bitmap, db_per_page)) {
dma_free_coherent(&(dev->pdev->dev), PAGE_SIZE,
db->u.pgdir->db_page, db->u.pgdir->db_dma);
list_del(&db->u.pgdir->list);
kfree(db->u.pgdir->bitmap);
kfree(db->u.pgdir);
}
mutex_unlock(&dev->priv.pgdir_mutex);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eli Cohen | 117 | 85.40% | 1 | 50.00% |
| Daniel Jurgens | 20 | 14.60% | 1 | 50.00% |
| Total | 137 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(mlx5_db_free);
void mlx5_fill_page_array(struct mlx5_buf *buf, __be64 *pas)
{
u64 addr;
int i;
for (i = 0; i < buf->npages; i++) {
addr = buf->direct.map + (i << buf->page_shift);
pas[i] = cpu_to_be64(addr);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eli Cohen | 63 | 100.00% | 1 | 100.00% |
| Total | 63 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(mlx5_fill_page_array);
void mlx5_fill_page_frag_array(struct mlx5_frag_buf *buf, __be64 *pas)
{
int i;
for (i = 0; i < buf->npages; i++)
pas[i] = cpu_to_be64(buf->frags[i].map);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tariq Toukan | 49 | 100.00% | 1 | 100.00% |
| Total | 49 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(mlx5_fill_page_frag_array);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eli Cohen | 685 | 47.74% | 1 | 11.11% |
| Tariq Toukan | 419 | 29.20% | 1 | 11.11% |
| Saeed Mahameed | 219 | 15.26% | 3 | 33.33% |
| Daniel Jurgens | 106 | 7.39% | 1 | 11.11% |
| Jack Morgenstein | 3 | 0.21% | 1 | 11.11% |
| Arnd Bergmann | 2 | 0.14% | 1 | 11.11% |
| Amir Vadai | 1 | 0.07% | 1 | 11.11% |
| Total | 1435 | 100.00% | 9 | 100.00% |
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