QE: Move QE from arch/powerpc to drivers/soc

ls1 has qe and ls1 has arm cpu.
move qe from arch/powerpc to drivers/soc/fsl
to adapt to powerpc and arm

Signed-off-by: Zhao Qiang <qiang.zhao@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>

1 files changed, 235 insertions, 0 deletions

diff --git a/drivers/soc/fsl/qe/qe_common.c b/drivers/soc/fsl/qe/qe_common.c
new file mode 100644
index 000000000000..419fa5b7be4d
--- /dev/null
+++ b/drivers/soc/fsl/qe/qe_common.c
@@ -0,0 +1,235 @@
+/*
+ * 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>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ */
+#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 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);