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authorZhao Qiang <qiang.zhao@freescale.com>2015-11-30 10:48:54 +0800
committerScott Wood <scottwood@freescale.com>2015-12-22 17:10:18 -0600
commit0e6e01ff694ee222acc5a9184211678473c948e3 (patch)
treeb3c1809b02b0b8accf5b7b8ca82c632842799e7a /arch/powerpc/sysdev/cpm_common.c
parentgenalloc:support allocating specific region (diff)
downloadlinux-dev-0e6e01ff694ee222acc5a9184211678473c948e3.tar.xz
linux-dev-0e6e01ff694ee222acc5a9184211678473c948e3.zip
CPM/QE: use genalloc to manage CPM/QE muram
Use genalloc to manage CPM/QE muram instead of rheap. Signed-off-by: Zhao Qiang <qiang.zhao@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc/sysdev/cpm_common.c')
-rw-r--r--arch/powerpc/sysdev/cpm_common.c126
1 files changed, 88 insertions, 38 deletions
diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c
index e00a5ee58fd7..fcc83cd9cc2f 100644
--- a/arch/powerpc/sysdev/cpm_common.c
+++ b/arch/powerpc/sysdev/cpm_common.c
@@ -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