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

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

arch/powerpc/include/asm/cpm.h

+3 −0
Original line number Diff line number Diff line
@@ -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);

arch/powerpc/platforms/Kconfig

+2 −2
Original line number Diff line number Diff line
@@ -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

arch/powerpc/sysdev/cpm_common.c

+88 −38
Original line number Diff line number Diff line
@@ -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

lib/genalloc.c

+1 −1
Original line number Diff line number Diff line
@@ -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,