Commit 0e6e01ff authored by Zhao Qiang's avatar Zhao Qiang Committed by Scott Wood

CPM/QE: use genalloc to manage CPM/QE muram

Use genalloc to manage CPM/QE muram instead of rheap.
Signed-off-by: default avatarZhao Qiang <qiang.zhao@freescale.com>
Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
parent b26981c8
......@@ -2,6 +2,7 @@
#define __CPM_H
#include <linux/compiler.h>
#include <linux/genalloc.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/of.h>
......@@ -161,6 +162,8 @@ int cpm_muram_init(void);
unsigned long cpm_muram_alloc(unsigned long size, unsigned long align);
int cpm_muram_free(unsigned long offset);
unsigned long cpm_muram_alloc_fixed(unsigned long offset, unsigned long size);
unsigned long cpm_muram_alloc_common(unsigned long size, genpool_algo_t algo,
void *data);
void __iomem *cpm_muram_addr(unsigned long offset);
unsigned long cpm_muram_offset(void __iomem *addr);
dma_addr_t cpm_muram_dma(void __iomem *addr);
......
......@@ -275,7 +275,7 @@ config TAU_AVERAGE
config QUICC_ENGINE
bool "Freescale QUICC Engine (QE) Support"
depends on FSL_SOC && PPC32
select PPC_LIB_RHEAP
select GENERIC_ALLOCATOR
select CRC32
help
The QUICC Engine (QE) is a new generation of communications
......@@ -295,7 +295,6 @@ config CPM2
bool "Enable support for the CPM2 (Communications Processor Module)"
depends on (FSL_SOC_BOOKE && PPC32) || 8260
select CPM
select PPC_LIB_RHEAP
select PPC_PCI_CHOICE
select ARCH_REQUIRE_GPIOLIB
help
......@@ -325,6 +324,7 @@ config FSL_ULI1575
config CPM
bool
select GENERIC_ALLOCATOR
config OF_RTC
bool
......
......@@ -17,6 +17,7 @@
* published by the Free Software Foundation.
*/
#include <linux/genalloc.h>
#include <linux/init.h>
#include <linux/of_device.h>
#include <linux/spinlock.h>
......@@ -27,7 +28,6 @@
#include <asm/udbg.h>
#include <asm/io.h>
#include <asm/rheap.h>
#include <asm/cpm.h>
#include <mm/mmu_decl.h>
......@@ -65,14 +65,22 @@ void __init udbg_init_cpm(void)
}
#endif
static struct gen_pool *muram_pool;
static spinlock_t cpm_muram_lock;
static rh_block_t cpm_boot_muram_rh_block[16];
static rh_info_t cpm_muram_info;
static u8 __iomem *muram_vbase;
static phys_addr_t muram_pbase;
/* Max address size we deal with */
struct muram_block {
struct list_head head;
unsigned long 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)
{
......@@ -87,50 +95,51 @@ int cpm_muram_init(void)
return 0;
spin_lock_init(&cpm_muram_lock);
/* initialize the info header */
rh_init(&cpm_muram_info, 1,
sizeof(cpm_boot_muram_rh_block) /
sizeof(cpm_boot_muram_rh_block[0]),
cpm_boot_muram_rh_block);
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) {
printk(KERN_ERR "Cannot find CPM muram data node");
pr_err("Cannot find CPM muram data node");
ret = -ENODEV;
goto out;
goto out_muram;
}
}
muram_pool = gen_pool_create(0, -1);
muram_pbase = of_translate_address(np, zero);
if (muram_pbase == (phys_addr_t)OF_BAD_ADDR) {
printk(KERN_ERR "Cannot translate zero through CPM muram node");
pr_err("Cannot translate zero through CPM muram node");
ret = -ENODEV;
goto out;
goto out_pool;
}
while (of_address_to_resource(np, i++, &r) == 0) {
if (r.end > max)
max = r.end;
rh_attach_region(&cpm_muram_info, r.start - muram_pbase,
resource_size(&r));
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) {
printk(KERN_ERR "Cannot map CPM muram");
pr_err("Cannot map QE muram");
ret = -ENOMEM;
goto out_pool;
}
out:
goto out_muram;
out_pool:
gen_pool_destroy(muram_pool);
out_muram:
of_node_put(np);
return ret;
}
/**
/*
* cpm_muram_alloc - allocate the requested size worth of multi-user ram
* @size: number of bytes to allocate
* @align: requested alignment, in bytes
......@@ -143,14 +152,13 @@ unsigned long cpm_muram_alloc(unsigned long size, unsigned long align)
{
unsigned long start;
unsigned long flags;
struct genpool_data_align muram_pool_data;
spin_lock_irqsave(&cpm_muram_lock, flags);
cpm_muram_info.alignment = align;
start = rh_alloc(&cpm_muram_info, size, "commproc");
if (!IS_ERR_VALUE(start))
memset_io(cpm_muram_addr(start), 0, size);
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);
......@@ -161,23 +169,31 @@ EXPORT_SYMBOL(cpm_muram_alloc);
*/
int cpm_muram_free(unsigned long offset)
{
int ret;
unsigned long flags;
int size;
struct muram_block *tmp;
size = 0;
spin_lock_irqsave(&cpm_muram_lock, flags);
ret = rh_free(&cpm_muram_info, offset);
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);
return ret;
return size;
}
EXPORT_SYMBOL(cpm_muram_free);
/**
/*
* cpm_muram_alloc_fixed - reserve a specific region of multi-user ram
* @offset: the offset into the muram area to reserve
* @size: the number of bytes to reserve
*
* This function returns "start" on success, -ENOMEM on failure.
* @offset: offset of allocation start address
* @size: number of bytes to allocate
* This function returns an offset into the muram area
* Use cpm_dpram_addr() to get the virtual address of the area.
* Use cpm_muram_free() to free the allocation.
*/
......@@ -185,16 +201,50 @@ unsigned long cpm_muram_alloc_fixed(unsigned long offset, unsigned long size)
{
unsigned long start;
unsigned long flags;
struct genpool_data_fixed muram_pool_data_fixed;
spin_lock_irqsave(&cpm_muram_lock, flags);
cpm_muram_info.alignment = 1;
start = rh_alloc_fixed(&cpm_muram_info, offset, size, "commproc");
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_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 an offset into the muram area.
*/
unsigned long cpm_muram_alloc_common(unsigned long size, genpool_algo_t algo,
void *data)
{
struct muram_block *entry;
unsigned long start;
start = gen_pool_alloc_algo(muram_pool, size, algo, data);
if (!start)
goto out2;
start = start - GENPOOL_OFFSET;
memset_io(cpm_muram_addr(start), 0, size);
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
goto out1;
entry->start = start;
entry->size = size;
list_add(&entry->head, &muram_block_list);
return start;
out1:
gen_pool_free(muram_pool, start, size);
out2:
return (unsigned long)-ENOMEM;
}
/**
* cpm_muram_addr - turn a muram offset into a virtual address
* @offset: muram offset to convert
......
......@@ -576,7 +576,7 @@ unsigned long gen_pool_fixed_alloc(unsigned long *map, unsigned long size,
fixed_data = data;
order = pool->min_alloc_order;
offset_bit = fixed_data->offset >> order;
if (WARN_ON(fixed_data->offset & (1UL << order - 1)))
if (WARN_ON(fixed_data->offset & ((1UL << order) - 1)))
return size;
start_bit = bitmap_find_next_zero_area(map, size,
......
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