--- /dev/null
+/*
+ * PS3 address space management.
+ *
+ * Copyright (C) 2006 Sony Computer Entertainment Inc.
+ * Copyright 2006 Sony Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/memory_hotplug.h>
+
+#include <asm/firmware.h>
+#include <asm/lmb.h>
+#include <asm/udbg.h>
+#include <asm/ps3.h>
+#include <asm/lv1call.h>
+
+#include "platform.h"
+
+#if defined(DEBUG)
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...) do{if(0)printk(fmt);}while(0)
+#endif
+
+enum {
+#if defined(CONFIG_PS3_USE_LPAR_ADDR)
+ USE_LPAR_ADDR = 1,
+#else
+ USE_LPAR_ADDR = 0,
+#endif
+#if defined(CONFIG_PS3_DYNAMIC_DMA)
+ USE_DYNAMIC_DMA = 1,
+#else
+ USE_DYNAMIC_DMA = 0,
+#endif
+};
+
+enum {
+ PAGE_SHIFT_4K = 12U,
+ PAGE_SHIFT_64K = 16U,
+ PAGE_SHIFT_16M = 24U,
+};
+
+static unsigned long make_page_sizes(unsigned long a, unsigned long b)
+{
+ return (a << 56) | (b << 48);
+}
+
+enum {
+ ALLOCATE_MEMORY_TRY_ALT_UNIT = 0X04,
+ ALLOCATE_MEMORY_ADDR_ZERO = 0X08,
+};
+
+/* valid htab sizes are {18,19,20} = 256K, 512K, 1M */
+
+enum {
+ HTAB_SIZE_MAX = 20U, /* HV limit of 1MB */
+ HTAB_SIZE_MIN = 18U, /* CPU limit of 256KB */
+};
+
+/*============================================================================*/
+/* virtual address space routines */
+/*============================================================================*/
+
+/**
+ * struct mem_region - memory region structure
+ * @base: base address
+ * @size: size in bytes
+ * @offset: difference between base and rm.size
+ */
+
+struct mem_region {
+ unsigned long base;
+ unsigned long size;
+ unsigned long offset;
+};
+
+/**
+ * struct map - address space state variables holder
+ * @total: total memory available as reported by HV
+ * @vas_id - HV virtual address space id
+ * @htab_size: htab size in bytes
+ *
+ * The HV virtual address space (vas) allows for hotplug memory regions.
+ * Memory regions can be created and destroyed in the vas at runtime.
+ * @rm: real mode (bootmem) region
+ * @r1: hotplug memory region(s)
+ *
+ * ps3 addresses
+ * virt_addr: a cpu 'translated' effective address
+ * phys_addr: an address in what Linux thinks is the physical address space
+ * lpar_addr: an address in the HV virtual address space
+ * bus_addr: an io controller 'translated' address on a device bus
+ */
+
+struct map {
+ unsigned long total;
+ unsigned long vas_id;
+ unsigned long htab_size;
+ struct mem_region rm;
+ struct mem_region r1;
+};
+
+#define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__)
+static void _debug_dump_map(const struct map* m, const char* func, int line)
+{
+ DBG("%s:%d: map.total = %lxh\n", func, line, m->total);
+ DBG("%s:%d: map.rm.size = %lxh\n", func, line, m->rm.size);
+ DBG("%s:%d: map.vas_id = %lu\n", func, line, m->vas_id);
+ DBG("%s:%d: map.htab_size = %lxh\n", func, line, m->htab_size);
+ DBG("%s:%d: map.r1.base = %lxh\n", func, line, m->r1.base);
+ DBG("%s:%d: map.r1.offset = %lxh\n", func, line, m->r1.offset);
+ DBG("%s:%d: map.r1.size = %lxh\n", func, line, m->r1.size);
+}
+
+static struct map map;
+
+/**
+ * ps3_mm_phys_to_lpar - translate a linux physical address to lpar address
+ * @phys_addr: linux physical address
+ */
+
+unsigned long ps3_mm_phys_to_lpar(unsigned long phys_addr)
+{
+ BUG_ON(is_kernel_addr(phys_addr));
+ if (USE_LPAR_ADDR)
+ return phys_addr;
+ else
+ return (phys_addr < map.rm.size || phys_addr >= map.total)
+ ? phys_addr : phys_addr + map.r1.offset;
+}
+
+EXPORT_SYMBOL(ps3_mm_phys_to_lpar);
+
+/**
+ * ps3_mm_vas_create - create the virtual address space
+ */
+
+void __init ps3_mm_vas_create(unsigned long* htab_size)
+{
+ int result;
+ unsigned long start_address;
+ unsigned long size;
+ unsigned long access_right;
+ unsigned long max_page_size;
+ unsigned long flags;
+
+ result = lv1_query_logical_partition_address_region_info(0,
+ &start_address, &size, &access_right, &max_page_size,
+ &flags);
+
+ if (result) {
+ DBG("%s:%d: lv1_query_logical_partition_address_region_info "
+ "failed: %s\n", __func__, __LINE__,
+ ps3_result(result));
+ goto fail;
+ }
+
+ if (max_page_size < PAGE_SHIFT_16M) {
+ DBG("%s:%d: bad max_page_size %lxh\n", __func__, __LINE__,
+ max_page_size);
+ goto fail;
+ }
+
+ BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE > HTAB_SIZE_MAX);
+ BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE < HTAB_SIZE_MIN);
+
+ result = lv1_construct_virtual_address_space(CONFIG_PS3_HTAB_SIZE,
+ 2, make_page_sizes(PAGE_SHIFT_16M, PAGE_SHIFT_64K),
+ &map.vas_id, &map.htab_size);
+
+ if (result) {
+ DBG("%s:%d: lv1_construct_virtual_address_space failed: %s\n",
+ __func__, __LINE__, ps3_result(result));
+ goto fail;
+ }
+
+ result = lv1_select_virtual_address_space(map.vas_id);
+
+ if (result) {
+ DBG("%s:%d: lv1_select_virtual_address_space failed: %s\n",
+ __func__, __LINE__, ps3_result(result));
+ goto fail;
+ }
+
+ *htab_size = map.htab_size;
+
+ debug_dump_map(&map);
+
+ return;
+
+fail:
+ panic("ps3_mm_vas_create failed");
+}
+
+/**
+ * ps3_mm_vas_destroy -
+ */
+
+void ps3_mm_vas_destroy(void)
+{
+ if (map.vas_id) {
+ lv1_select_virtual_address_space(0);
+ lv1_destruct_virtual_address_space(map.vas_id);
+ map.vas_id = 0;
+ }
+}
+
+/*============================================================================*/
+/* memory hotplug routines */
+/*============================================================================*/
+
+/**
+ * ps3_mm_region_create - create a memory region in the vas
+ * @r: pointer to a struct mem_region to accept initialized values
+ * @size: requested region size
+ *
+ * This implementation creates the region with the vas large page size.
+ * @size is rounded down to a multiple of the vas large page size.
+ */
+
+int ps3_mm_region_create(struct mem_region *r, unsigned long size)
+{
+ int result;
+ unsigned long muid;
+
+ r->size = _ALIGN_DOWN(size, 1 << PAGE_SHIFT_16M);
+
+ DBG("%s:%d requested %lxh\n", __func__, __LINE__, size);
+ DBG("%s:%d actual %lxh\n", __func__, __LINE__, r->size);
+ DBG("%s:%d difference %lxh (%luMB)\n", __func__, __LINE__,
+ (unsigned long)(size - r->size),
+ (size - r->size) / 1024 / 1024);
+
+ if (r->size == 0) {
+ DBG("%s:%d: size == 0\n", __func__, __LINE__);
+ result = -1;
+ goto zero_region;
+ }
+
+ result = lv1_allocate_memory(r->size, PAGE_SHIFT_16M, 0,
+ ALLOCATE_MEMORY_TRY_ALT_UNIT, &r->base, &muid);
+
+ if (result || r->base < map.rm.size) {
+ DBG("%s:%d: lv1_allocate_memory failed: %s\n",
+ __func__, __LINE__, ps3_result(result));
+ goto zero_region;
+ }
+
+ r->offset = r->base - map.rm.size;
+ return result;
+
+zero_region:
+ r->size = r->base = r->offset = 0;
+ return result;
+}
+
+/**
+ * ps3_mm_region_destroy - destroy a memory region
+ * @r: pointer to struct mem_region
+ */
+
+void ps3_mm_region_destroy(struct mem_region *r)
+{
+ if (r->base) {
+ lv1_release_memory(r->base);
+ r->size = r->base = r->offset = 0;
+ map.total = map.rm.size;
+ }
+}
+
+/**
+ * ps3_mm_add_memory - hot add memory
+ */
+
+static int __init ps3_mm_add_memory(void)
+{
+ int result;
+ unsigned long start_addr;
+ unsigned long start_pfn;
+ unsigned long nr_pages;
+
+ if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
+ return 0;
+
+ BUG_ON(!mem_init_done);
+
+ start_addr = USE_LPAR_ADDR ? map.r1.base : map.rm.size;
+ start_pfn = start_addr >> PAGE_SHIFT;
+ nr_pages = (map.r1.size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+
+ DBG("%s:%d: start_addr %lxh, start_pfn %lxh, nr_pages %lxh\n",
+ __func__, __LINE__, start_addr, start_pfn, nr_pages);
+
+ result = add_memory(0, start_addr, map.r1.size);
+
+ if (result) {
+ DBG("%s:%d: add_memory failed: (%d)\n",
+ __func__, __LINE__, result);
+ return result;
+ }
+
+ result = online_pages(start_pfn, nr_pages);
+
+ if (result)
+ DBG("%s:%d: online_pages failed: (%d)\n",
+ __func__, __LINE__, result);
+
+ return result;
+}
+
+core_initcall(ps3_mm_add_memory);
+
+/*============================================================================*/
+/* dma routines */
+/*============================================================================*/
+
+/**
+ * dma_lpar_to_bus - Translate an lpar address to ioc mapped bus address.
+ * @r: pointer to dma region structure
+ * @lpar_addr: HV lpar address
+ */
+
+static unsigned long dma_lpar_to_bus(struct ps3_dma_region *r,
+ unsigned long lpar_addr)
+{
+ BUG_ON(lpar_addr >= map.r1.base + map.r1.size);
+ return r->bus_addr + (lpar_addr <= map.rm.size ? lpar_addr
+ : lpar_addr - map.r1.offset);
+}
+
+#define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__)
+static void _dma_dump_region(const struct ps3_dma_region *r, const char* func,
+ int line)
+{
+ DBG("%s:%d: dev %u:%u\n", func, line, r->did.bus_id,
+ r->did.dev_id);
+ DBG("%s:%d: page_size %u\n", func, line, r->page_size);
+ DBG("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
+ DBG("%s:%d: len %lxh\n", func, line, r->len);
+}
+
+/**
+ * dma_chunk - A chunk of dma pages mapped by the io controller.
+ * @region - The dma region that owns this chunk.
+ * @lpar_addr: Starting lpar address of the area to map.
+ * @bus_addr: Starting ioc bus address of the area to map.
+ * @len: Length in bytes of the area to map.
+ * @link: A struct list_head used with struct ps3_dma_region.chunk_list, the
+ * list of all chuncks owned by the region.
+ *
+ * This implementation uses a very simple dma page manager
+ * based on the dma_chunk structure. This scheme assumes
+ * that all drivers use very well behaved dma ops.
+ */
+
+struct dma_chunk {
+ struct ps3_dma_region *region;
+ unsigned long lpar_addr;
+ unsigned long bus_addr;
+ unsigned long len;
+ struct list_head link;
+ unsigned int usage_count;
+};
+
+#define dma_dump_chunk(_a) _dma_dump_chunk(_a, __func__, __LINE__)
+static void _dma_dump_chunk (const struct dma_chunk* c, const char* func,
+ int line)
+{
+ DBG("%s:%d: r.dev %u:%u\n", func, line,
+ c->region->did.bus_id, c->region->did.dev_id);
+ DBG("%s:%d: r.bus_addr %lxh\n", func, line, c->region->bus_addr);
+ DBG("%s:%d: r.page_size %u\n", func, line, c->region->page_size);
+ DBG("%s:%d: r.len %lxh\n", func, line, c->region->len);
+ DBG("%s:%d: c.lpar_addr %lxh\n", func, line, c->lpar_addr);
+ DBG("%s:%d: c.bus_addr %lxh\n", func, line, c->bus_addr);
+ DBG("%s:%d: c.len %lxh\n", func, line, c->len);
+}
+
+static struct dma_chunk * dma_find_chunk(struct ps3_dma_region *r,
+ unsigned long bus_addr, unsigned long len)
+{
+ struct dma_chunk *c;
+ unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 1 << r->page_size);
+ unsigned long aligned_len = _ALIGN_UP(len, 1 << r->page_size);
+
+ list_for_each_entry(c, &r->chunk_list.head, link) {
+ /* intersection */
+ if (aligned_bus >= c->bus_addr
+ && aligned_bus < c->bus_addr + c->len
+ && aligned_bus + aligned_len <= c->bus_addr + c->len) {
+ return c;
+ }
+ /* below */
+ if (aligned_bus + aligned_len <= c->bus_addr) {
+ continue;
+ }
+ /* above */
+ if (aligned_bus >= c->bus_addr + c->len) {
+ continue;
+ }
+
+ /* we don't handle the multi-chunk case for now */
+
+ dma_dump_chunk(c);
+ BUG();
+ }
+ return NULL;
+}
+
+static int dma_free_chunk(struct dma_chunk *c)
+{
+ int result = 0;
+
+ if (c->bus_addr) {
+ result = lv1_unmap_device_dma_region(c->region->did.bus_id,
+ c->region->did.dev_id, c->bus_addr, c->len);
+ BUG_ON(result);
+ }
+
+ kfree(c);
+ return result;
+}
+
+/**
+ * dma_map_pages - Maps dma pages into the io controller bus address space.
+ * @r: Pointer to a struct ps3_dma_region.
+ * @phys_addr: Starting physical address of the area to map.
+ * @len: Length in bytes of the area to map.
+ * c_out: A pointer to receive an allocated struct dma_chunk for this area.
+ *
+ * This is the lowest level dma mapping routine, and is the one that will
+ * make the HV call to add the pages into the io controller address space.
+ */
+
+static int dma_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
+ unsigned long len, struct dma_chunk **c_out)
+{
+ int result;
+ struct dma_chunk *c;
+
+ c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC);
+
+ if (!c) {
+ result = -ENOMEM;
+ goto fail_alloc;
+ }
+
+ c->region = r;
+ c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
+ c->bus_addr = dma_lpar_to_bus(r, c->lpar_addr);
+ c->len = len;
+
+ result = lv1_map_device_dma_region(c->region->did.bus_id,
+ c->region->did.dev_id, c->lpar_addr, c->bus_addr, c->len,
+ 0xf800000000000000UL);
+
+ if (result) {
+ DBG("%s:%d: lv1_map_device_dma_region failed: %s\n",
+ __func__, __LINE__, ps3_result(result));
+ goto fail_map;
+ }
+
+ list_add(&c->link, &r->chunk_list.head);
+
+ *c_out = c;
+ return 0;
+
+fail_map:
+ kfree(c);
+fail_alloc:
+ *c_out = NULL;
+ DBG(" <- %s:%d\n", __func__, __LINE__);
+ return result;
+}
+
+/**
+ * dma_region_create - Create a device dma region.
+ * @r: Pointer to a struct ps3_dma_region.
+ *
+ * This is the lowest level dma region create routine, and is the one that
+ * will make the HV call to create the region.
+ */
+
+static int dma_region_create(struct ps3_dma_region* r)
+{
+ int result;
+
+ r->len = _ALIGN_UP(map.total, 1 << r->page_size);
+ INIT_LIST_HEAD(&r->chunk_list.head);
+ spin_lock_init(&r->chunk_list.lock);
+
+ result = lv1_allocate_device_dma_region(r->did.bus_id, r->did.dev_id,
+ r->len, r->page_size, r->region_type, &r->bus_addr);
+
+ dma_dump_region(r);
+
+ if (result) {
+ DBG("%s:%d: lv1_allocate_device_dma_region failed: %s\n",
+ __func__, __LINE__, ps3_result(result));
+ r->len = r->bus_addr = 0;
+ }
+
+ return result;
+}
+
+/**
+ * dma_region_free - Free a device dma region.
+ * @r: Pointer to a struct ps3_dma_region.
+ *
+ * This is the lowest level dma region free routine, and is the one that
+ * will make the HV call to free the region.
+ */
+
+static int dma_region_free(struct ps3_dma_region* r)
+{
+ int result;
+ struct dma_chunk *c;
+ struct dma_chunk *tmp;
+
+ list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) {
+ list_del(&c->link);
+ dma_free_chunk(c);
+ }
+
+ result = lv1_free_device_dma_region(r->did.bus_id, r->did.dev_id,
+ r->bus_addr);
+
+ if (result)
+ DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
+ __func__, __LINE__, ps3_result(result));
+
+ r->len = r->bus_addr = 0;
+
+ return result;
+}
+
+/**
+ * dma_map_area - Map an area of memory into a device dma region.
+ * @r: Pointer to a struct ps3_dma_region.
+ * @virt_addr: Starting virtual address of the area to map.
+ * @len: Length in bytes of the area to map.
+ * @bus_addr: A pointer to return the starting ioc bus address of the area to
+ * map.
+ *
+ * This is the common dma mapping routine.
+ */
+
+static int dma_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
+ unsigned long len, unsigned long *bus_addr)
+{
+ int result;
+ unsigned long flags;
+ struct dma_chunk *c;
+ unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
+ : virt_addr;
+
+ *bus_addr = dma_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr));
+
+ if (!USE_DYNAMIC_DMA) {
+ unsigned long lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
+ DBG(" -> %s:%d\n", __func__, __LINE__);
+ DBG("%s:%d virt_addr %lxh\n", __func__, __LINE__,
+ virt_addr);
+ DBG("%s:%d phys_addr %lxh\n", __func__, __LINE__,
+ phys_addr);
+ DBG("%s:%d lpar_addr %lxh\n", __func__, __LINE__,
+ lpar_addr);
+ DBG("%s:%d len %lxh\n", __func__, __LINE__, len);
+ DBG("%s:%d bus_addr %lxh (%lxh)\n", __func__, __LINE__,
+ *bus_addr, len);
+ }
+
+ spin_lock_irqsave(&r->chunk_list.lock, flags);
+ c = dma_find_chunk(r, *bus_addr, len);
+
+ if (c) {
+ c->usage_count++;
+ spin_unlock_irqrestore(&r->chunk_list.lock, flags);
+ return 0;
+ }
+
+ result = dma_map_pages(r, _ALIGN_DOWN(phys_addr, 1 << r->page_size),
+ _ALIGN_UP(len, 1 << r->page_size), &c);
+
+ if (result) {
+ *bus_addr = 0;
+ DBG("%s:%d: dma_map_pages failed (%d)\n",
+ __func__, __LINE__, result);
+ spin_unlock_irqrestore(&r->chunk_list.lock, flags);
+ return result;
+ }
+
+ c->usage_count = 1;
+
+ spin_unlock_irqrestore(&r->chunk_list.lock, flags);
+ return result;
+}
+
+/**
+ * dma_unmap_area - Unmap an area of memory from a device dma region.
+ * @r: Pointer to a struct ps3_dma_region.
+ * @bus_addr: The starting ioc bus address of the area to unmap.
+ * @len: Length in bytes of the area to unmap.
+ *
+ * This is the common dma unmap routine.
+ */
+
+int dma_unmap_area(struct ps3_dma_region *r, unsigned long bus_addr,
+ unsigned long len)
+{
+ unsigned long flags;
+ struct dma_chunk *c;
+
+ spin_lock_irqsave(&r->chunk_list.lock, flags);
+ c = dma_find_chunk(r, bus_addr, len);
+
+ if (!c) {
+ unsigned long aligned_bus = _ALIGN_DOWN(bus_addr,
+ 1 << r->page_size);
+ unsigned long aligned_len = _ALIGN_UP(len, 1 << r->page_size);
+ DBG("%s:%d: not found: bus_addr %lxh\n",
+ __func__, __LINE__, bus_addr);
+ DBG("%s:%d: not found: len %lxh\n",
+ __func__, __LINE__, len);
+ DBG("%s:%d: not found: aligned_bus %lxh\n",
+ __func__, __LINE__, aligned_bus);
+ DBG("%s:%d: not found: aligned_len %lxh\n",
+ __func__, __LINE__, aligned_len);
+ BUG();
+ }
+
+ c->usage_count--;
+
+ if (!c->usage_count) {
+ list_del(&c->link);
+ dma_free_chunk(c);
+ }
+
+ spin_unlock_irqrestore(&r->chunk_list.lock, flags);
+ return 0;
+}
+
+/**
+ * dma_region_create_linear - Setup a linear dma maping for a device.
+ * @r: Pointer to a struct ps3_dma_region.
+ *
+ * This routine creates an HV dma region for the device and maps all available
+ * ram into the io controller bus address space.
+ */
+
+static int dma_region_create_linear(struct ps3_dma_region *r)
+{
+ int result;
+ unsigned long tmp;
+
+ /* force 16M dma pages for linear mapping */
+
+ if (r->page_size != PS3_DMA_16M) {
+ pr_info("%s:%d: forcing 16M pages for linear map\n",
+ __func__, __LINE__);
+ r->page_size = PS3_DMA_16M;
+ }
+
+ result = dma_region_create(r);
+ BUG_ON(result);
+
+ result = dma_map_area(r, map.rm.base, map.rm.size, &tmp);
+ BUG_ON(result);
+
+ if (USE_LPAR_ADDR)
+ result = dma_map_area(r, map.r1.base, map.r1.size,
+ &tmp);
+ else
+ result = dma_map_area(r, map.rm.size, map.r1.size,
+ &tmp);
+
+ BUG_ON(result);
+
+ return result;
+}
+
+/**
+ * dma_region_free_linear - Free a linear dma mapping for a device.
+ * @r: Pointer to a struct ps3_dma_region.
+ *
+ * This routine will unmap all mapped areas and free the HV dma region.
+ */
+
+static int dma_region_free_linear(struct ps3_dma_region *r)
+{
+ int result;
+
+ result = dma_unmap_area(r, dma_lpar_to_bus(r, 0), map.rm.size);
+ BUG_ON(result);
+
+ result = dma_unmap_area(r, dma_lpar_to_bus(r, map.r1.base),
+ map.r1.size);
+ BUG_ON(result);
+
+ result = dma_region_free(r);
+ BUG_ON(result);
+
+ return result;
+}
+
+/**
+ * dma_map_area_linear - Map an area of memory into a device dma region.
+ * @r: Pointer to a struct ps3_dma_region.
+ * @virt_addr: Starting virtual address of the area to map.
+ * @len: Length in bytes of the area to map.
+ * @bus_addr: A pointer to return the starting ioc bus address of the area to
+ * map.
+ *
+ * This routine just returns the coresponding bus address. Actual mapping
+ * occurs in dma_region_create_linear().
+ */
+
+static int dma_map_area_linear(struct ps3_dma_region *r,
+ unsigned long virt_addr, unsigned long len, unsigned long *bus_addr)
+{
+ unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
+ : virt_addr;
+ *bus_addr = dma_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr));
+ return 0;
+}
+
+/**
+ * dma_unmap_area_linear - Unmap an area of memory from a device dma region.
+ * @r: Pointer to a struct ps3_dma_region.
+ * @bus_addr: The starting ioc bus address of the area to unmap.
+ * @len: Length in bytes of the area to unmap.
+ *
+ * This routine does nothing. Unmapping occurs in dma_region_free_linear().
+ */
+
+static int dma_unmap_area_linear(struct ps3_dma_region *r,
+ unsigned long bus_addr, unsigned long len)
+{
+ return 0;
+}
+
+int ps3_dma_region_create(struct ps3_dma_region *r)
+{
+ return (USE_DYNAMIC_DMA)
+ ? dma_region_create(r)
+ : dma_region_create_linear(r);
+}
+
+int ps3_dma_region_free(struct ps3_dma_region *r)
+{
+ return (USE_DYNAMIC_DMA)
+ ? dma_region_free(r)
+ : dma_region_free_linear(r);
+}
+
+int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr,
+ unsigned long len, unsigned long *bus_addr)
+{
+ return (USE_DYNAMIC_DMA)
+ ? dma_map_area(r, virt_addr, len, bus_addr)
+ : dma_map_area_linear(r, virt_addr, len, bus_addr);
+}
+
+int ps3_dma_unmap(struct ps3_dma_region *r, unsigned long bus_addr,
+ unsigned long len)
+{
+ return (USE_DYNAMIC_DMA) ? dma_unmap_area(r, bus_addr, len)
+ : dma_unmap_area_linear(r, bus_addr, len);
+}
+
+/*============================================================================*/
+/* system startup routines */
+/*============================================================================*/
+
+/**
+ * ps3_mm_init - initialize the address space state variables
+ */
+
+void __init ps3_mm_init(void)
+{
+ int result;
+
+ DBG(" -> %s:%d\n", __func__, __LINE__);
+
+ result = ps3_repository_read_mm_info(&map.rm.base, &map.rm.size,
+ &map.total);
+
+ if (result)
+ panic("ps3_repository_read_mm_info() failed");
+
+ map.rm.offset = map.rm.base;
+ map.vas_id = map.htab_size = 0;
+
+ /* this implementation assumes map.rm.base is zero */
+
+ BUG_ON(map.rm.base);
+ BUG_ON(!map.rm.size);
+
+ lmb_add(map.rm.base, map.rm.size);
+ lmb_analyze();
+
+ /* arrange to do this in ps3_mm_add_memory */
+ ps3_mm_region_create(&map.r1, map.total - map.rm.size);
+
+ DBG(" <- %s:%d\n", __func__, __LINE__);
+}
+
+/**
+ * ps3_mm_shutdown - final cleanup of address space
+ */
+
+void ps3_mm_shutdown(void)
+{
+ ps3_mm_region_destroy(&map.r1);
+ map.total = map.rm.size;
+}
git://git.onelab.eu / linux-2.6.git / blobdiff