diff options
Diffstat (limited to 'arch/powerpc/sysdev/cpm_common.c')
-rw-r--r-- | arch/powerpc/sysdev/cpm_common.c | 208 |
1 files changed, 1 insertions, 207 deletions
diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c index fcc83cd..6993aa8 100644 --- a/arch/powerpc/sysdev/cpm_common.c +++ b/arch/powerpc/sysdev/cpm_common.c @@ -17,7 +17,6 @@ * published by the Free Software Foundation. */ -#include <linux/genalloc.h> #include <linux/init.h> #include <linux/of_device.h> #include <linux/spinlock.h> @@ -29,6 +28,7 @@ #include <asm/udbg.h> #include <asm/io.h> #include <asm/cpm.h> +#include <asm/qe.h> #include <mm/mmu_decl.h> @@ -65,212 +65,6 @@ void __init udbg_init_cpm(void) } #endif -static struct gen_pool *muram_pool; -static spinlock_t cpm_muram_lock; -static u8 __iomem *muram_vbase; -static phys_addr_t muram_pbase; - -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) -{ - struct device_node *np; - struct resource r; - u32 zero[OF_MAX_ADDR_CELLS] = {}; - resource_size_t max = 0; - int i = 0; - int ret = 0; - - if (muram_pbase) - return 0; - - spin_lock_init(&cpm_muram_lock); - 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); - 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 - allocate the requested size worth of multi-user ram - * @size: number of bytes to allocate - * @align: requested alignment, in bytes - * - * 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. - */ -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); - 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(). - */ -int cpm_muram_free(unsigned long offset) -{ - unsigned long flags; - int size; - struct muram_block *tmp; - - 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); - return size; -} -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 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. - */ -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); - 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 - */ -void __iomem *cpm_muram_addr(unsigned long offset) -{ - return muram_vbase + offset; -} -EXPORT_SYMBOL(cpm_muram_addr); - -unsigned long cpm_muram_offset(void __iomem *addr) -{ - return addr - (void __iomem *)muram_vbase; -} -EXPORT_SYMBOL(cpm_muram_offset); - -/** - * cpm_muram_dma - turn a muram virtual address into a DMA address - * @offset: virtual address from cpm_muram_addr() to convert - */ -dma_addr_t cpm_muram_dma(void __iomem *addr) -{ - return muram_pbase + ((u8 __iomem *)addr - muram_vbase); -} -EXPORT_SYMBOL(cpm_muram_dma); - #if defined(CONFIG_CPM2) || defined(CONFIG_8xx_GPIO) struct cpm2_ioports { |