2 * PS3 system bus driver.
4 * Copyright (C) 2006 Sony Computer Entertainment Inc.
5 * Copyright 2006 Sony Corp.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/kernel.h>
22 #include <linux/init.h>
23 #include <linux/module.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/err.h>
29 #include <asm/lv1call.h>
31 #define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
32 static void _dump_mmio_region(const struct ps3_mmio_region* r,
33 const char* func, int line)
35 pr_debug("%s:%d: dev %u:%u\n", func, line, r->did.bus_id,
37 pr_debug("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
38 pr_debug("%s:%d: len %lxh\n", func, line, r->len);
39 pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
42 int ps3_mmio_region_create(struct ps3_mmio_region *r)
46 result = lv1_map_device_mmio_region(r->did.bus_id, r->did.dev_id,
47 r->bus_addr, r->len, r->page_size, &r->lpar_addr);
50 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
51 __func__, __LINE__, ps3_result(result));
52 r->lpar_addr = r->len = r->bus_addr = 0;
59 int ps3_free_mmio_region(struct ps3_mmio_region *r)
63 result = lv1_unmap_device_mmio_region(r->did.bus_id, r->did.dev_id,
67 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
68 __func__, __LINE__, ps3_result(result));
70 r->lpar_addr = r->len = r->bus_addr = 0;
74 static int ps3_system_bus_match(struct device *_dev,
75 struct device_driver *_drv)
78 struct ps3_system_bus_driver *drv = to_ps3_system_bus_driver(_drv);
79 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
81 result = dev->match_id == drv->match_id;
83 pr_info("%s:%d: dev=%u(%s), drv=%u(%s): %s\n", __func__, __LINE__,
84 dev->match_id, dev->core.bus_id, drv->match_id, drv->core.name,
85 (result ? "match" : "miss"));
89 static int ps3_system_bus_probe(struct device *_dev)
92 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
93 struct ps3_system_bus_driver *drv =
94 to_ps3_system_bus_driver(_dev->driver);
96 result = lv1_open_device(dev->did.bus_id, dev->did.dev_id, 0);
99 pr_debug("%s:%d: lv1_open_device failed (%d)\n",
100 __func__, __LINE__, result);
105 if (dev->d_region->did.bus_id) {
106 result = ps3_dma_region_create(dev->d_region);
109 pr_debug("%s:%d: ps3_dma_region_create failed (%d)\n",
110 __func__, __LINE__, result);
111 BUG_ON("check region type");
120 result = drv->probe(dev);
122 pr_info("%s:%d: %s no probe method\n", __func__, __LINE__,
126 pr_debug("%s:%d: drv->probe failed\n", __func__, __LINE__);
133 ps3_dma_region_free(dev->d_region);
135 lv1_close_device(dev->did.bus_id, dev->did.dev_id);
140 static int ps3_system_bus_remove(struct device *_dev)
142 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
143 struct ps3_system_bus_driver *drv =
144 to_ps3_system_bus_driver(_dev->driver);
149 pr_info("%s:%d: %s no remove method\n", __func__, __LINE__,
152 ps3_dma_region_free(dev->d_region);
153 ps3_free_mmio_region(dev->m_region);
154 lv1_close_device(dev->did.bus_id, dev->did.dev_id);
159 struct bus_type ps3_system_bus_type = {
160 .name = "ps3_system_bus",
161 .match = ps3_system_bus_match,
162 .probe = ps3_system_bus_probe,
163 .remove = ps3_system_bus_remove,
166 int __init ps3_system_bus_init(void)
170 result = bus_register(&ps3_system_bus_type);
175 core_initcall(ps3_system_bus_init);
177 /* Allocates a contiguous real buffer and creates mappings over it.
178 * Returns the virtual address of the buffer and sets dma_handle
179 * to the dma address (mapping) of the first page.
182 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
183 dma_addr_t *dma_handle, gfp_t flag)
186 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
187 unsigned long virt_addr;
189 BUG_ON(!dev->d_region->bus_addr);
191 flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
194 virt_addr = __get_free_pages(flag, get_order(size));
197 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
201 result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle);
204 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
205 __func__, __LINE__, result);
206 BUG_ON("check region type");
210 return (void*)virt_addr;
213 free_pages(virt_addr, get_order(size));
219 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
220 dma_addr_t dma_handle)
222 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
224 ps3_dma_unmap(dev->d_region, dma_handle, size);
225 free_pages((unsigned long)vaddr, get_order(size));
228 /* Creates TCEs for a user provided buffer. The user buffer must be
229 * contiguous real kernel storage (not vmalloc). The address of the buffer
230 * passed here is the kernel (virtual) address of the buffer. The buffer
231 * need not be page aligned, the dma_addr_t returned will point to the same
232 * byte within the page as vaddr.
235 static dma_addr_t ps3_map_single(struct device *_dev, void *ptr, size_t size,
236 enum dma_data_direction direction)
238 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
240 unsigned long bus_addr;
242 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
246 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
247 __func__, __LINE__, result);
253 static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
254 size_t size, enum dma_data_direction direction)
256 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
259 result = ps3_dma_unmap(dev->d_region, dma_addr, size);
262 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
263 __func__, __LINE__, result);
267 static int ps3_map_sg(struct device *_dev, struct scatterlist *sg, int nents,
268 enum dma_data_direction direction)
270 #if defined(CONFIG_PS3_DYNAMIC_DMA)
276 static void ps3_unmap_sg(struct device *_dev, struct scatterlist *sg,
277 int nents, enum dma_data_direction direction)
279 #if defined(CONFIG_PS3_DYNAMIC_DMA)
284 static int ps3_dma_supported(struct device *_dev, u64 mask)
289 static struct dma_mapping_ops ps3_dma_ops = {
290 .alloc_coherent = ps3_alloc_coherent,
291 .free_coherent = ps3_free_coherent,
292 .map_single = ps3_map_single,
293 .unmap_single = ps3_unmap_single,
294 .map_sg = ps3_map_sg,
295 .unmap_sg = ps3_unmap_sg,
296 .dma_supported = ps3_dma_supported
300 * ps3_system_bus_release_device - remove a device from the system bus
303 static void ps3_system_bus_release_device(struct device *_dev)
305 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
310 * ps3_system_bus_device_register - add a device to the system bus
312 * ps3_system_bus_device_register() expects the dev object to be allocated
313 * dynamically by the caller. The system bus takes ownership of the dev
314 * object and frees the object in ps3_system_bus_release_device().
317 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
320 static unsigned int dev_count = 1;
322 dev->core.parent = NULL;
323 dev->core.bus = &ps3_system_bus_type;
324 dev->core.release = ps3_system_bus_release_device;
326 dev->core.archdata.of_node = NULL;
327 dev->core.archdata.dma_ops = &ps3_dma_ops;
328 dev->core.archdata.numa_node = 0;
330 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), "sb_%02x",
333 pr_debug("%s:%d add %s\n", __func__, __LINE__, dev->core.bus_id);
335 result = device_register(&dev->core);
339 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
341 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
345 drv->core.bus = &ps3_system_bus_type;
347 result = driver_register(&drv->core);
351 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
353 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
355 driver_unregister(&drv->core);
358 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);