Contributors: 25
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Scott Wood |
336 |
40.63% |
3 |
7.14% |
| Zhao Qiang |
257 |
31.08% |
4 |
9.52% |
| Vitaly Bordug |
69 |
8.34% |
3 |
7.14% |
| Rasmus Villemoes |
58 |
7.01% |
7 |
16.67% |
| Anton Vorontsov |
19 |
2.30% |
2 |
4.76% |
| Hongjun Chen |
16 |
1.93% |
1 |
2.38% |
| Christophe Leroy |
13 |
1.57% |
2 |
4.76% |
| Li Yang |
8 |
0.97% |
2 |
4.76% |
| Saurabh Sengar |
5 |
0.60% |
2 |
4.76% |
| Kumar Gala |
5 |
0.60% |
1 |
2.38% |
| Huang Ying |
5 |
0.60% |
1 |
2.38% |
| Benjamin Gaignard |
4 |
0.48% |
1 |
2.38% |
| Joe Perches |
4 |
0.48% |
1 |
2.38% |
| Zheng Yongjun |
4 |
0.48% |
1 |
2.38% |
| Paul Gortmaker |
3 |
0.36% |
1 |
2.38% |
| Laurent Pinchart |
3 |
0.36% |
1 |
2.38% |
| Jes Sorensen |
3 |
0.36% |
1 |
2.38% |
| Rob Herring |
3 |
0.36% |
1 |
2.38% |
| Anton Blanchard |
3 |
0.36% |
1 |
2.38% |
| Thomas Gleixner |
2 |
0.24% |
1 |
2.38% |
| Linus Torvalds (pre-git) |
2 |
0.24% |
1 |
2.38% |
| Timur Tabi |
2 |
0.24% |
1 |
2.38% |
| Lee Jones |
1 |
0.12% |
1 |
2.38% |
| Linus Torvalds |
1 |
0.12% |
1 |
2.38% |
| Dean Nelson |
1 |
0.12% |
1 |
2.38% |
| Total |
827 |
|
42 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Common CPM code
*
* Author: Scott Wood <scottwood@freescale.com>
*
* Copyright 2007-2008,2010 Freescale Semiconductor, Inc.
*
* Some parts derived from commproc.c/cpm2_common.c, which is:
* Copyright (c) 1997 Dan error_act (dmalek@jlc.net)
* Copyright (c) 1999-2001 Dan Malek <dan@embeddedalley.com>
* Copyright (c) 2000 MontaVista Software, Inc (source@mvista.com)
* 2006 (c) MontaVista Software, Inc.
* Vitaly Bordug <vbordug@ru.mvista.com>
*/
#include <linux/genalloc.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/of_device.h>
#include <linux/spinlock.h>
#include <linux/export.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <soc/fsl/qe/qe.h>
static struct gen_pool *muram_pool;
static DEFINE_SPINLOCK(cpm_muram_lock);
static void __iomem *muram_vbase;
static phys_addr_t muram_pbase;
struct muram_block {
struct list_head head;
s32 start;
int size;
};
static LIST_HEAD(muram_block_list);
/* max address size we deal with */
#define OF_MAX_ADDR_CELLS 4
#define GENPOOL_OFFSET (4096 * 8)
int cpm_muram_init(void)
{
struct device_node *np;
struct resource r;
__be32 zero[OF_MAX_ADDR_CELLS] = {};
resource_size_t max = 0;
int i = 0;
int ret = 0;
if (muram_pbase)
return 0;
np = of_find_compatible_node(NULL, NULL, "fsl,cpm-muram-data");
if (!np) {
/* try legacy bindings */
np = of_find_node_by_name(NULL, "data-only");
if (!np) {
pr_err("Cannot find CPM muram data node");
ret = -ENODEV;
goto out_muram;
}
}
muram_pool = gen_pool_create(0, -1);
if (!muram_pool) {
pr_err("Cannot allocate memory pool for CPM/QE muram");
ret = -ENOMEM;
goto out_muram;
}
muram_pbase = of_translate_address(np, zero);
if (muram_pbase == (phys_addr_t)OF_BAD_ADDR) {
pr_err("Cannot translate zero through CPM muram node");
ret = -ENODEV;
goto out_pool;
}
while (of_address_to_resource(np, i++, &r) == 0) {
if (r.end > max)
max = r.end;
ret = gen_pool_add(muram_pool, r.start - muram_pbase +
GENPOOL_OFFSET, resource_size(&r), -1);
if (ret) {
pr_err("QE: couldn't add muram to pool!\n");
goto out_pool;
}
}
muram_vbase = ioremap(muram_pbase, max - muram_pbase + 1);
if (!muram_vbase) {
pr_err("Cannot map QE muram");
ret = -ENOMEM;
goto out_pool;
}
goto out_muram;
out_pool:
gen_pool_destroy(muram_pool);
out_muram:
of_node_put(np);
return ret;
}
/*
* cpm_muram_alloc_common - cpm_muram_alloc common code
* @size: number of bytes to allocate
* @algo: algorithm for alloc.
* @data: data for genalloc's algorithm.
*
* This function returns a non-negative offset into the muram area, or
* a negative errno on failure.
*/
static s32 cpm_muram_alloc_common(unsigned long size,
genpool_algo_t algo, void *data)
{
struct muram_block *entry;
s32 start;
entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
if (!entry)
return -ENOMEM;
start = gen_pool_alloc_algo(muram_pool, size, algo, data);
if (!start) {
kfree(entry);
return -ENOMEM;
}
start = start - GENPOOL_OFFSET;
memset_io(cpm_muram_addr(start), 0, size);
entry->start = start;
entry->size = size;
list_add(&entry->head, &muram_block_list);
return start;
}
/*
* cpm_muram_alloc - allocate the requested size worth of multi-user ram
* @size: number of bytes to allocate
* @align: requested alignment, in bytes
*
* This function returns a non-negative offset into the muram area, or
* a negative errno on failure.
* Use cpm_dpram_addr() to get the virtual address of the area.
* Use cpm_muram_free() to free the allocation.
*/
s32 cpm_muram_alloc(unsigned long size, unsigned long align)
{
s32 start;
unsigned long flags;
struct genpool_data_align muram_pool_data;
spin_lock_irqsave(&cpm_muram_lock, flags);
muram_pool_data.align = align;
start = cpm_muram_alloc_common(size, gen_pool_first_fit_align,
&muram_pool_data);
spin_unlock_irqrestore(&cpm_muram_lock, flags);
return start;
}
EXPORT_SYMBOL(cpm_muram_alloc);
/**
* cpm_muram_free - free a chunk of multi-user ram
* @offset: The beginning of the chunk as returned by cpm_muram_alloc().
*/
void cpm_muram_free(s32 offset)
{
unsigned long flags;
int size;
struct muram_block *tmp;
if (offset < 0)
return;
size = 0;
spin_lock_irqsave(&cpm_muram_lock, flags);
list_for_each_entry(tmp, &muram_block_list, head) {
if (tmp->start == offset) {
size = tmp->size;
list_del(&tmp->head);
kfree(tmp);
break;
}
}
gen_pool_free(muram_pool, offset + GENPOOL_OFFSET, size);
spin_unlock_irqrestore(&cpm_muram_lock, flags);
}
EXPORT_SYMBOL(cpm_muram_free);
/*
* cpm_muram_alloc_fixed - reserve a specific region of multi-user ram
* @offset: offset of allocation start address
* @size: number of bytes to allocate
* This function returns @offset if the area was available, a negative
* errno otherwise.
* Use cpm_dpram_addr() to get the virtual address of the area.
* Use cpm_muram_free() to free the allocation.
*/
s32 cpm_muram_alloc_fixed(unsigned long offset, unsigned long size)
{
s32 start;
unsigned long flags;
struct genpool_data_fixed muram_pool_data_fixed;
spin_lock_irqsave(&cpm_muram_lock, flags);
muram_pool_data_fixed.offset = offset + GENPOOL_OFFSET;
start = cpm_muram_alloc_common(size, gen_pool_fixed_alloc,
&muram_pool_data_fixed);
spin_unlock_irqrestore(&cpm_muram_lock, flags);
return start;
}
EXPORT_SYMBOL(cpm_muram_alloc_fixed);
/**
* cpm_muram_addr - turn a muram offset into a virtual address
* @offset: muram offset to convert
*/
void __iomem *cpm_muram_addr(unsigned long offset)
{
return muram_vbase + offset;
}
EXPORT_SYMBOL(cpm_muram_addr);
unsigned long cpm_muram_offset(const void __iomem *addr)
{
return addr - muram_vbase;
}
EXPORT_SYMBOL(cpm_muram_offset);
/**
* cpm_muram_dma - turn a muram virtual address into a DMA address
* @addr: virtual address from cpm_muram_addr() to convert
*/
dma_addr_t cpm_muram_dma(void __iomem *addr)
{
return muram_pbase + (addr - muram_vbase);
}
EXPORT_SYMBOL(cpm_muram_dma);
/*
* As cpm_muram_free, but takes the virtual address rather than the
* muram offset.
*/
void cpm_muram_free_addr(const void __iomem *addr)
{
if (!addr)
return;
cpm_muram_free(cpm_muram_offset(addr));
}
EXPORT_SYMBOL(cpm_muram_free_addr);