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>
30 #include <asm/firmware.h>
32 #define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
33 static void _dump_mmio_region(const struct ps3_mmio_region* r,
34 const char* func, int line)
36 pr_debug("%s:%d: dev %u:%u\n", func, line, r->did.bus_id,
38 pr_debug("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
39 pr_debug("%s:%d: len %lxh\n", func, line, r->len);
40 pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
43 int ps3_mmio_region_create(struct ps3_mmio_region *r)
47 result = lv1_map_device_mmio_region(r->did.bus_id, r->did.dev_id,
48 r->bus_addr, r->len, r->page_size, &r->lpar_addr);
51 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
52 __func__, __LINE__, ps3_result(result));
53 r->lpar_addr = r->len = r->bus_addr = 0;
60 int ps3_free_mmio_region(struct ps3_mmio_region *r)
64 result = lv1_unmap_device_mmio_region(r->did.bus_id, r->did.dev_id,
68 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
69 __func__, __LINE__, ps3_result(result));
71 r->lpar_addr = r->len = r->bus_addr = 0;
75 static int ps3_system_bus_match(struct device *_dev,
76 struct device_driver *_drv)
79 struct ps3_system_bus_driver *drv = to_ps3_system_bus_driver(_drv);
80 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
82 result = dev->match_id == drv->match_id;
84 pr_info("%s:%d: dev=%u(%s), drv=%u(%s): %s\n", __func__, __LINE__,
85 dev->match_id, dev->core.bus_id, drv->match_id, drv->core.name,
86 (result ? "match" : "miss"));
90 static int ps3_system_bus_probe(struct device *_dev)
93 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
94 struct ps3_system_bus_driver *drv =
95 to_ps3_system_bus_driver(_dev->driver);
97 result = lv1_open_device(dev->did.bus_id, dev->did.dev_id, 0);
100 pr_debug("%s:%d: lv1_open_device failed (%d)\n",
101 __func__, __LINE__, result);
106 if (dev->d_region->did.bus_id) {
107 result = ps3_dma_region_create(dev->d_region);
110 pr_debug("%s:%d: ps3_dma_region_create failed (%d)\n",
111 __func__, __LINE__, result);
112 BUG_ON("check region type");
121 result = drv->probe(dev);
123 pr_info("%s:%d: %s no probe method\n", __func__, __LINE__,
127 pr_debug("%s:%d: drv->probe failed\n", __func__, __LINE__);
134 ps3_dma_region_free(dev->d_region);
136 lv1_close_device(dev->did.bus_id, dev->did.dev_id);
141 static int ps3_system_bus_remove(struct device *_dev)
143 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
144 struct ps3_system_bus_driver *drv =
145 to_ps3_system_bus_driver(_dev->driver);
150 pr_info("%s:%d: %s no remove method\n", __func__, __LINE__,
153 ps3_dma_region_free(dev->d_region);
154 ps3_free_mmio_region(dev->m_region);
155 lv1_close_device(dev->did.bus_id, dev->did.dev_id);
160 struct bus_type ps3_system_bus_type = {
161 .name = "ps3_system_bus",
162 .match = ps3_system_bus_match,
163 .probe = ps3_system_bus_probe,
164 .remove = ps3_system_bus_remove,
167 int __init ps3_system_bus_init(void)
171 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
174 result = bus_register(&ps3_system_bus_type);
179 core_initcall(ps3_system_bus_init);
181 /* Allocates a contiguous real buffer and creates mappings over it.
182 * Returns the virtual address of the buffer and sets dma_handle
183 * to the dma address (mapping) of the first page.
186 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
187 dma_addr_t *dma_handle, gfp_t flag)
190 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
191 unsigned long virt_addr;
193 BUG_ON(!dev->d_region->bus_addr);
195 flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
198 virt_addr = __get_free_pages(flag, get_order(size));
201 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
205 result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle);
208 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
209 __func__, __LINE__, result);
210 BUG_ON("check region type");
214 return (void*)virt_addr;
217 free_pages(virt_addr, get_order(size));
223 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
224 dma_addr_t dma_handle)
226 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
228 ps3_dma_unmap(dev->d_region, dma_handle, size);
229 free_pages((unsigned long)vaddr, get_order(size));
232 /* Creates TCEs for a user provided buffer. The user buffer must be
233 * contiguous real kernel storage (not vmalloc). The address of the buffer
234 * passed here is the kernel (virtual) address of the buffer. The buffer
235 * need not be page aligned, the dma_addr_t returned will point to the same
236 * byte within the page as vaddr.
239 static dma_addr_t ps3_map_single(struct device *_dev, void *ptr, size_t size,
240 enum dma_data_direction direction)
242 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
244 unsigned long bus_addr;
246 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
250 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
251 __func__, __LINE__, result);
257 static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
258 size_t size, enum dma_data_direction direction)
260 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
263 result = ps3_dma_unmap(dev->d_region, dma_addr, size);
266 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
267 __func__, __LINE__, result);
271 static int ps3_map_sg(struct device *_dev, struct scatterlist *sg, int nents,
272 enum dma_data_direction direction)
274 #if defined(CONFIG_PS3_DYNAMIC_DMA)
280 static void ps3_unmap_sg(struct device *_dev, struct scatterlist *sg,
281 int nents, enum dma_data_direction direction)
283 #if defined(CONFIG_PS3_DYNAMIC_DMA)
288 static int ps3_dma_supported(struct device *_dev, u64 mask)
293 static struct dma_mapping_ops ps3_dma_ops = {
294 .alloc_coherent = ps3_alloc_coherent,
295 .free_coherent = ps3_free_coherent,
296 .map_single = ps3_map_single,
297 .unmap_single = ps3_unmap_single,
298 .map_sg = ps3_map_sg,
299 .unmap_sg = ps3_unmap_sg,
300 .dma_supported = ps3_dma_supported
304 * ps3_system_bus_release_device - remove a device from the system bus
307 static void ps3_system_bus_release_device(struct device *_dev)
309 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
314 * ps3_system_bus_device_register - add a device to the system bus
316 * ps3_system_bus_device_register() expects the dev object to be allocated
317 * dynamically by the caller. The system bus takes ownership of the dev
318 * object and frees the object in ps3_system_bus_release_device().
321 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
324 static unsigned int dev_count = 1;
326 dev->core.parent = NULL;
327 dev->core.bus = &ps3_system_bus_type;
328 dev->core.release = ps3_system_bus_release_device;
330 dev->core.archdata.of_node = NULL;
331 dev->core.archdata.dma_ops = &ps3_dma_ops;
332 dev->core.archdata.numa_node = 0;
334 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), "sb_%02x",
337 pr_debug("%s:%d add %s\n", __func__, __LINE__, dev->core.bus_id);
339 result = device_register(&dev->core);
343 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
345 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
349 drv->core.bus = &ps3_system_bus_type;
351 result = driver_register(&drv->core);
355 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
357 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
359 driver_unregister(&drv->core);
362 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);