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-rw-r--r--kernel/arch/powerpc/platforms/ps3/mm.c1251
1 files changed, 1251 insertions, 0 deletions
diff --git a/kernel/arch/powerpc/platforms/ps3/mm.c b/kernel/arch/powerpc/platforms/ps3/mm.c
new file mode 100644
index 000000000..b0f34663b
--- /dev/null
+++ b/kernel/arch/powerpc/platforms/ps3/mm.c
@@ -0,0 +1,1251 @@
+/*
+ * 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/export.h>
+#include <linux/memblock.h>
+#include <linux/slab.h>
+
+#include <asm/cell-regs.h>
+#include <asm/firmware.h>
+#include <asm/prom.h>
+#include <asm/udbg.h>
+#include <asm/lv1call.h>
+#include <asm/setup.h>
+
+#include "platform.h"
+
+#if defined(DEBUG)
+#define DBG udbg_printf
+#else
+#define DBG pr_devel
+#endif
+
+enum {
+#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
+ * @destroy: flag if region should be destroyed upon shutdown
+ */
+
+struct mem_region {
+ u64 base;
+ u64 size;
+ unsigned long offset;
+ int destroy;
+};
+
+/**
+ * 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: highmem 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 {
+ u64 total;
+ u64 vas_id;
+ u64 htab_size;
+ struct mem_region rm;
+ struct mem_region r1;
+};
+
+#define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__)
+static void __maybe_unused _debug_dump_map(const struct map *m,
+ const char *func, int line)
+{
+ DBG("%s:%d: map.total = %llxh\n", func, line, m->total);
+ DBG("%s:%d: map.rm.size = %llxh\n", func, line, m->rm.size);
+ DBG("%s:%d: map.vas_id = %llu\n", func, line, m->vas_id);
+ DBG("%s:%d: map.htab_size = %llxh\n", func, line, m->htab_size);
+ DBG("%s:%d: map.r1.base = %llxh\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 = %llxh\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));
+ 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;
+ u64 start_address;
+ u64 size;
+ u64 access_right;
+ u64 max_page_size;
+ u64 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 %llxh\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)
+{
+ int result;
+
+ DBG("%s:%d: map.vas_id = %llu\n", __func__, __LINE__, map.vas_id);
+
+ if (map.vas_id) {
+ result = lv1_select_virtual_address_space(0);
+ BUG_ON(result);
+ result = lv1_destruct_virtual_address_space(map.vas_id);
+ BUG_ON(result);
+ map.vas_id = 0;
+ }
+}
+
+static int ps3_mm_get_repository_highmem(struct mem_region *r)
+{
+ int result;
+
+ /* Assume a single highmem region. */
+
+ result = ps3_repository_read_highmem_info(0, &r->base, &r->size);
+
+ if (result)
+ goto zero_region;
+
+ if (!r->base || !r->size) {
+ result = -1;
+ goto zero_region;
+ }
+
+ r->offset = r->base - map.rm.size;
+
+ DBG("%s:%d: Found high region in repository: %llxh %llxh\n",
+ __func__, __LINE__, r->base, r->size);
+
+ return 0;
+
+zero_region:
+ DBG("%s:%d: No high region in repository.\n", __func__, __LINE__);
+
+ r->size = r->base = r->offset = 0;
+ return result;
+}
+
+static int ps3_mm_set_repository_highmem(const struct mem_region *r)
+{
+ /* Assume a single highmem region. */
+
+ return r ? ps3_repository_write_highmem_info(0, r->base, r->size) :
+ ps3_repository_write_highmem_info(0, 0, 0);
+}
+
+/**
+ * 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.
+ */
+
+static int ps3_mm_region_create(struct mem_region *r, unsigned long size)
+{
+ int result;
+ u64 muid;
+
+ r->size = _ALIGN_DOWN(size, 1 << PAGE_SHIFT_16M);
+
+ DBG("%s:%d requested %lxh\n", __func__, __LINE__, size);
+ DBG("%s:%d actual %llxh\n", __func__, __LINE__, r->size);
+ DBG("%s:%d difference %llxh (%lluMB)\n", __func__, __LINE__,
+ 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->destroy = 1;
+ 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
+ */
+
+static void ps3_mm_region_destroy(struct mem_region *r)
+{
+ int result;
+
+ if (!r->destroy) {
+ pr_info("%s:%d: Not destroying high region: %llxh %llxh\n",
+ __func__, __LINE__, r->base, r->size);
+ return;
+ }
+
+ DBG("%s:%d: r->base = %llxh\n", __func__, __LINE__, r->base);
+
+ if (r->base) {
+ result = lv1_release_memory(r->base);
+ BUG_ON(result);
+ r->size = r->base = r->offset = 0;
+ map.total = map.rm.size;
+ }
+ ps3_mm_set_repository_highmem(NULL);
+}
+
+/*============================================================================*/
+/* dma routines */
+/*============================================================================*/
+
+/**
+ * dma_sb_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_sb_lpar_to_bus(struct ps3_dma_region *r,
+ unsigned long lpar_addr)
+{
+ if (lpar_addr >= map.rm.size)
+ lpar_addr -= map.r1.offset;
+ BUG_ON(lpar_addr < r->offset);
+ BUG_ON(lpar_addr >= r->offset + r->len);
+ return r->bus_addr + lpar_addr - r->offset;
+}
+
+#define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__)
+static void __maybe_unused _dma_dump_region(const struct ps3_dma_region *r,
+ const char *func, int line)
+{
+ DBG("%s:%d: dev %llu:%llu\n", func, line, r->dev->bus_id,
+ r->dev->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);
+ DBG("%s:%d: offset %lxh\n", func, line, r->offset);
+}
+
+ /**
+ * 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 %llu:%llu\n", func, line,
+ c->region->dev->bus_id, c->region->dev->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: r.offset %lxh\n", func, line, c->region->offset);
+ 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+bus_addr-aligned_bus,
+ 1 << r->page_size);
+
+ list_for_each_entry(c, &r->chunk_list.head, link) {
+ /* intersection */
+ if (aligned_bus >= c->bus_addr &&
+ 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 struct dma_chunk *dma_find_chunk_lpar(struct ps3_dma_region *r,
+ unsigned long lpar_addr, unsigned long len)
+{
+ struct dma_chunk *c;
+ unsigned long aligned_lpar = _ALIGN_DOWN(lpar_addr, 1 << r->page_size);
+ unsigned long aligned_len = _ALIGN_UP(len + lpar_addr - aligned_lpar,
+ 1 << r->page_size);
+
+ list_for_each_entry(c, &r->chunk_list.head, link) {
+ /* intersection */
+ if (c->lpar_addr <= aligned_lpar &&
+ aligned_lpar < c->lpar_addr + c->len) {
+ if (aligned_lpar + aligned_len <= c->lpar_addr + c->len)
+ return c;
+ else {
+ dma_dump_chunk(c);
+ BUG();
+ }
+ }
+ /* below */
+ if (aligned_lpar + aligned_len <= c->lpar_addr) {
+ continue;
+ }
+ /* above */
+ if (c->lpar_addr + c->len <= aligned_lpar) {
+ continue;
+ }
+ }
+ return NULL;
+}
+
+static int dma_sb_free_chunk(struct dma_chunk *c)
+{
+ int result = 0;
+
+ if (c->bus_addr) {
+ result = lv1_unmap_device_dma_region(c->region->dev->bus_id,
+ c->region->dev->dev_id, c->bus_addr, c->len);
+ BUG_ON(result);
+ }
+
+ kfree(c);
+ return result;
+}
+
+static int dma_ioc0_free_chunk(struct dma_chunk *c)
+{
+ int result = 0;
+ int iopage;
+ unsigned long offset;
+ struct ps3_dma_region *r = c->region;
+
+ DBG("%s:start\n", __func__);
+ for (iopage = 0; iopage < (c->len >> r->page_size); iopage++) {
+ offset = (1 << r->page_size) * iopage;
+ /* put INVALID entry */
+ result = lv1_put_iopte(0,
+ c->bus_addr + offset,
+ c->lpar_addr + offset,
+ r->ioid,
+ 0);
+ DBG("%s: bus=%#lx, lpar=%#lx, ioid=%d\n", __func__,
+ c->bus_addr + offset,
+ c->lpar_addr + offset,
+ r->ioid);
+
+ if (result) {
+ DBG("%s:%d: lv1_put_iopte failed: %s\n", __func__,
+ __LINE__, ps3_result(result));
+ }
+ }
+ kfree(c);
+ DBG("%s:end\n", __func__);
+ return result;
+}
+
+/**
+ * dma_sb_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_sb_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
+ unsigned long len, struct dma_chunk **c_out, u64 iopte_flag)
+{
+ 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_sb_lpar_to_bus(r, c->lpar_addr);
+ c->len = len;
+
+ BUG_ON(iopte_flag != 0xf800000000000000UL);
+ result = lv1_map_device_dma_region(c->region->dev->bus_id,
+ c->region->dev->dev_id, c->lpar_addr,
+ c->bus_addr, c->len, iopte_flag);
+ 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;
+}
+
+static int dma_ioc0_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
+ unsigned long len, struct dma_chunk **c_out,
+ u64 iopte_flag)
+{
+ int result;
+ struct dma_chunk *c, *last;
+ int iopage, pages;
+ unsigned long offset;
+
+ DBG(KERN_ERR "%s: phy=%#lx, lpar%#lx, len=%#lx\n", __func__,
+ phys_addr, ps3_mm_phys_to_lpar(phys_addr), len);
+ c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC);
+
+ if (!c) {
+ result = -ENOMEM;
+ goto fail_alloc;
+ }
+
+ c->region = r;
+ c->len = len;
+ c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
+ /* allocate IO address */
+ if (list_empty(&r->chunk_list.head)) {
+ /* first one */
+ c->bus_addr = r->bus_addr;
+ } else {
+ /* derive from last bus addr*/
+ last = list_entry(r->chunk_list.head.next,
+ struct dma_chunk, link);
+ c->bus_addr = last->bus_addr + last->len;
+ DBG("%s: last bus=%#lx, len=%#lx\n", __func__,
+ last->bus_addr, last->len);
+ }
+
+ /* FIXME: check whether length exceeds region size */
+
+ /* build ioptes for the area */
+ pages = len >> r->page_size;
+ DBG("%s: pgsize=%#x len=%#lx pages=%#x iopteflag=%#llx\n", __func__,
+ r->page_size, r->len, pages, iopte_flag);
+ for (iopage = 0; iopage < pages; iopage++) {
+ offset = (1 << r->page_size) * iopage;
+ result = lv1_put_iopte(0,
+ c->bus_addr + offset,
+ c->lpar_addr + offset,
+ r->ioid,
+ iopte_flag);
+ if (result) {
+ pr_warning("%s:%d: lv1_put_iopte failed: %s\n",
+ __func__, __LINE__, ps3_result(result));
+ goto fail_map;
+ }
+ DBG("%s: pg=%d bus=%#lx, lpar=%#lx, ioid=%#x\n", __func__,
+ iopage, c->bus_addr + offset, c->lpar_addr + offset,
+ r->ioid);
+ }
+
+ /* be sure that last allocated one is inserted at head */
+ list_add(&c->link, &r->chunk_list.head);
+
+ *c_out = c;
+ DBG("%s: end\n", __func__);
+ return 0;
+
+fail_map:
+ for (iopage--; 0 <= iopage; iopage--) {
+ lv1_put_iopte(0,
+ c->bus_addr + offset,
+ c->lpar_addr + offset,
+ r->ioid,
+ 0);
+ }
+ kfree(c);
+fail_alloc:
+ *c_out = NULL;
+ return result;
+}
+
+/**
+ * dma_sb_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_sb_region_create(struct ps3_dma_region *r)
+{
+ int result;
+ u64 bus_addr;
+
+ DBG(" -> %s:%d:\n", __func__, __LINE__);
+
+ BUG_ON(!r);
+
+ if (!r->dev->bus_id) {
+ pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__,
+ r->dev->bus_id, r->dev->dev_id);
+ return 0;
+ }
+
+ DBG("%s:%u: len = 0x%lx, page_size = %u, offset = 0x%lx\n", __func__,
+ __LINE__, r->len, r->page_size, r->offset);
+
+ BUG_ON(!r->len);
+ BUG_ON(!r->page_size);
+ BUG_ON(!r->region_ops);
+
+ INIT_LIST_HEAD(&r->chunk_list.head);
+ spin_lock_init(&r->chunk_list.lock);
+
+ result = lv1_allocate_device_dma_region(r->dev->bus_id, r->dev->dev_id,
+ roundup_pow_of_two(r->len), r->page_size, r->region_type,
+ &bus_addr);
+ r->bus_addr = bus_addr;
+
+ 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;
+}
+
+static int dma_ioc0_region_create(struct ps3_dma_region *r)
+{
+ int result;
+ u64 bus_addr;
+
+ INIT_LIST_HEAD(&r->chunk_list.head);
+ spin_lock_init(&r->chunk_list.lock);
+
+ result = lv1_allocate_io_segment(0,
+ r->len,
+ r->page_size,
+ &bus_addr);
+ r->bus_addr = bus_addr;
+ if (result) {
+ DBG("%s:%d: lv1_allocate_io_segment failed: %s\n",
+ __func__, __LINE__, ps3_result(result));
+ r->len = r->bus_addr = 0;
+ }
+ DBG("%s: len=%#lx, pg=%d, bus=%#lx\n", __func__,
+ r->len, r->page_size, r->bus_addr);
+ 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_sb_region_free(struct ps3_dma_region *r)
+{
+ int result;
+ struct dma_chunk *c;
+ struct dma_chunk *tmp;
+
+ BUG_ON(!r);
+
+ if (!r->dev->bus_id) {
+ pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__,
+ r->dev->bus_id, r->dev->dev_id);
+ return 0;
+ }
+
+ list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) {
+ list_del(&c->link);
+ dma_sb_free_chunk(c);
+ }
+
+ result = lv1_free_device_dma_region(r->dev->bus_id, r->dev->dev_id,
+ r->bus_addr);
+
+ if (result)
+ DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
+ __func__, __LINE__, ps3_result(result));
+
+ r->bus_addr = 0;
+
+ return result;
+}
+
+static int dma_ioc0_region_free(struct ps3_dma_region *r)
+{
+ int result;
+ struct dma_chunk *c, *n;
+
+ DBG("%s: start\n", __func__);
+ list_for_each_entry_safe(c, n, &r->chunk_list.head, link) {
+ list_del(&c->link);
+ dma_ioc0_free_chunk(c);
+ }
+
+ result = lv1_release_io_segment(0, r->bus_addr);
+
+ if (result)
+ DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
+ __func__, __LINE__, ps3_result(result));
+
+ r->bus_addr = 0;
+ DBG("%s: end\n", __func__);
+
+ return result;
+}
+
+/**
+ * dma_sb_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_sb_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
+ unsigned long len, dma_addr_t *bus_addr,
+ u64 iopte_flag)
+{
+ int result;
+ unsigned long flags;
+ struct dma_chunk *c;
+ unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
+ : virt_addr;
+ unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size);
+ unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys,
+ 1 << r->page_size);
+ *bus_addr = dma_sb_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 %llxh (%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) {
+ DBG("%s:%d: reusing mapped chunk", __func__, __LINE__);
+ dma_dump_chunk(c);
+ c->usage_count++;
+ spin_unlock_irqrestore(&r->chunk_list.lock, flags);
+ return 0;
+ }
+
+ result = dma_sb_map_pages(r, aligned_phys, aligned_len, &c, iopte_flag);
+
+ if (result) {
+ *bus_addr = 0;
+ DBG("%s:%d: dma_sb_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;
+}
+
+static int dma_ioc0_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
+ unsigned long len, dma_addr_t *bus_addr,
+ u64 iopte_flag)
+{
+ int result;
+ unsigned long flags;
+ struct dma_chunk *c;
+ unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
+ : virt_addr;
+ unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size);
+ unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys,
+ 1 << r->page_size);
+
+ DBG(KERN_ERR "%s: vaddr=%#lx, len=%#lx\n", __func__,
+ virt_addr, len);
+ DBG(KERN_ERR "%s: ph=%#lx a_ph=%#lx a_l=%#lx\n", __func__,
+ phys_addr, aligned_phys, aligned_len);
+
+ spin_lock_irqsave(&r->chunk_list.lock, flags);
+ c = dma_find_chunk_lpar(r, ps3_mm_phys_to_lpar(phys_addr), len);
+
+ if (c) {
+ /* FIXME */
+ BUG();
+ *bus_addr = c->bus_addr + phys_addr - aligned_phys;
+ c->usage_count++;
+ spin_unlock_irqrestore(&r->chunk_list.lock, flags);
+ return 0;
+ }
+
+ result = dma_ioc0_map_pages(r, aligned_phys, aligned_len, &c,
+ iopte_flag);
+
+ if (result) {
+ *bus_addr = 0;
+ DBG("%s:%d: dma_ioc0_map_pages failed (%d)\n",
+ __func__, __LINE__, result);
+ spin_unlock_irqrestore(&r->chunk_list.lock, flags);
+ return result;
+ }
+ *bus_addr = c->bus_addr + phys_addr - aligned_phys;
+ DBG("%s: va=%#lx pa=%#lx a_pa=%#lx bus=%#llx\n", __func__,
+ virt_addr, phys_addr, aligned_phys, *bus_addr);
+ c->usage_count = 1;
+
+ spin_unlock_irqrestore(&r->chunk_list.lock, flags);
+ return result;
+}
+
+/**
+ * dma_sb_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.
+ */
+
+static int dma_sb_unmap_area(struct ps3_dma_region *r, dma_addr_t 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 + bus_addr
+ - aligned_bus, 1 << r->page_size);
+ DBG("%s:%d: not found: bus_addr %llxh\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_sb_free_chunk(c);
+ }
+
+ spin_unlock_irqrestore(&r->chunk_list.lock, flags);
+ return 0;
+}
+
+static int dma_ioc0_unmap_area(struct ps3_dma_region *r,
+ dma_addr_t bus_addr, unsigned long len)
+{
+ unsigned long flags;
+ struct dma_chunk *c;
+
+ DBG("%s: start a=%#llx l=%#lx\n", __func__, bus_addr, len);
+ 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 + bus_addr
+ - aligned_bus,
+ 1 << r->page_size);
+ DBG("%s:%d: not found: bus_addr %llxh\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_ioc0_free_chunk(c);
+ }
+
+ spin_unlock_irqrestore(&r->chunk_list.lock, flags);
+ DBG("%s: end\n", __func__);
+ return 0;
+}
+
+/**
+ * dma_sb_region_create_linear - Setup a linear dma mapping 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_sb_region_create_linear(struct ps3_dma_region *r)
+{
+ int result;
+ unsigned long virt_addr, len;
+ dma_addr_t tmp;
+
+ if (r->len > 16*1024*1024) { /* FIXME: need proper fix */
+ /* 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;
+ r->len = _ALIGN_UP(r->len, 1 << r->page_size);
+ }
+ }
+
+ result = dma_sb_region_create(r);
+ BUG_ON(result);
+
+ if (r->offset < map.rm.size) {
+ /* Map (part of) 1st RAM chunk */
+ virt_addr = map.rm.base + r->offset;
+ len = map.rm.size - r->offset;
+ if (len > r->len)
+ len = r->len;
+ result = dma_sb_map_area(r, virt_addr, len, &tmp,
+ CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW |
+ CBE_IOPTE_M);
+ BUG_ON(result);
+ }
+
+ if (r->offset + r->len > map.rm.size) {
+ /* Map (part of) 2nd RAM chunk */
+ virt_addr = map.rm.size;
+ len = r->len;
+ if (r->offset >= map.rm.size)
+ virt_addr += r->offset - map.rm.size;
+ else
+ len -= map.rm.size - r->offset;
+ result = dma_sb_map_area(r, virt_addr, len, &tmp,
+ CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW |
+ CBE_IOPTE_M);
+ BUG_ON(result);
+ }
+
+ return result;
+}
+
+/**
+ * dma_sb_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_sb_region_free_linear(struct ps3_dma_region *r)
+{
+ int result;
+ dma_addr_t bus_addr;
+ unsigned long len, lpar_addr;
+
+ if (r->offset < map.rm.size) {
+ /* Unmap (part of) 1st RAM chunk */
+ lpar_addr = map.rm.base + r->offset;
+ len = map.rm.size - r->offset;
+ if (len > r->len)
+ len = r->len;
+ bus_addr = dma_sb_lpar_to_bus(r, lpar_addr);
+ result = dma_sb_unmap_area(r, bus_addr, len);
+ BUG_ON(result);
+ }
+
+ if (r->offset + r->len > map.rm.size) {
+ /* Unmap (part of) 2nd RAM chunk */
+ lpar_addr = map.r1.base;
+ len = r->len;
+ if (r->offset >= map.rm.size)
+ lpar_addr += r->offset - map.rm.size;
+ else
+ len -= map.rm.size - r->offset;
+ bus_addr = dma_sb_lpar_to_bus(r, lpar_addr);
+ result = dma_sb_unmap_area(r, bus_addr, len);
+ BUG_ON(result);
+ }
+
+ result = dma_sb_region_free(r);
+ BUG_ON(result);
+
+ return result;
+}
+
+/**
+ * dma_sb_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 corresponding bus address. Actual mapping
+ * occurs in dma_region_create_linear().
+ */
+
+static int dma_sb_map_area_linear(struct ps3_dma_region *r,
+ unsigned long virt_addr, unsigned long len, dma_addr_t *bus_addr,
+ u64 iopte_flag)
+{
+ unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
+ : virt_addr;
+ *bus_addr = dma_sb_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_sb_region_free_linear().
+ */
+
+static int dma_sb_unmap_area_linear(struct ps3_dma_region *r,
+ dma_addr_t bus_addr, unsigned long len)
+{
+ return 0;
+};
+
+static const struct ps3_dma_region_ops ps3_dma_sb_region_ops = {
+ .create = dma_sb_region_create,
+ .free = dma_sb_region_free,
+ .map = dma_sb_map_area,
+ .unmap = dma_sb_unmap_area
+};
+
+static const struct ps3_dma_region_ops ps3_dma_sb_region_linear_ops = {
+ .create = dma_sb_region_create_linear,
+ .free = dma_sb_region_free_linear,
+ .map = dma_sb_map_area_linear,
+ .unmap = dma_sb_unmap_area_linear
+};
+
+static const struct ps3_dma_region_ops ps3_dma_ioc0_region_ops = {
+ .create = dma_ioc0_region_create,
+ .free = dma_ioc0_region_free,
+ .map = dma_ioc0_map_area,
+ .unmap = dma_ioc0_unmap_area
+};
+
+int ps3_dma_region_init(struct ps3_system_bus_device *dev,
+ struct ps3_dma_region *r, enum ps3_dma_page_size page_size,
+ enum ps3_dma_region_type region_type, void *addr, unsigned long len)
+{
+ unsigned long lpar_addr;
+
+ lpar_addr = addr ? ps3_mm_phys_to_lpar(__pa(addr)) : 0;
+
+ r->dev = dev;
+ r->page_size = page_size;
+ r->region_type = region_type;
+ r->offset = lpar_addr;
+ if (r->offset >= map.rm.size)
+ r->offset -= map.r1.offset;
+ r->len = len ? len : _ALIGN_UP(map.total, 1 << r->page_size);
+
+ switch (dev->dev_type) {
+ case PS3_DEVICE_TYPE_SB:
+ r->region_ops = (USE_DYNAMIC_DMA)
+ ? &ps3_dma_sb_region_ops
+ : &ps3_dma_sb_region_linear_ops;
+ break;
+ case PS3_DEVICE_TYPE_IOC0:
+ r->region_ops = &ps3_dma_ioc0_region_ops;
+ break;
+ default:
+ BUG();
+ return -EINVAL;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ps3_dma_region_init);
+
+int ps3_dma_region_create(struct ps3_dma_region *r)
+{
+ BUG_ON(!r);
+ BUG_ON(!r->region_ops);
+ BUG_ON(!r->region_ops->create);
+ return r->region_ops->create(r);
+}
+EXPORT_SYMBOL(ps3_dma_region_create);
+
+int ps3_dma_region_free(struct ps3_dma_region *r)
+{
+ BUG_ON(!r);
+ BUG_ON(!r->region_ops);
+ BUG_ON(!r->region_ops->free);
+ return r->region_ops->free(r);
+}
+EXPORT_SYMBOL(ps3_dma_region_free);
+
+int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr,
+ unsigned long len, dma_addr_t *bus_addr,
+ u64 iopte_flag)
+{
+ return r->region_ops->map(r, virt_addr, len, bus_addr, iopte_flag);
+}
+
+int ps3_dma_unmap(struct ps3_dma_region *r, dma_addr_t bus_addr,
+ unsigned long len)
+{
+ return r->region_ops->unmap(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);
+
+ /* Check if we got the highmem region from an earlier boot step */
+
+ if (ps3_mm_get_repository_highmem(&map.r1)) {
+ result = ps3_mm_region_create(&map.r1, map.total - map.rm.size);
+
+ if (!result)
+ ps3_mm_set_repository_highmem(&map.r1);
+ }
+
+ /* correct map.total for the real total amount of memory we use */
+ map.total = map.rm.size + map.r1.size;
+
+ if (!map.r1.size) {
+ DBG("%s:%d: No highmem region found\n", __func__, __LINE__);
+ } else {
+ DBG("%s:%d: Adding highmem region: %llxh %llxh\n",
+ __func__, __LINE__, map.rm.size,
+ map.total - map.rm.size);
+ memblock_add(map.rm.size, 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);
+}