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>
28 #include <asm/lv1call.h>
29 #include <asm/firmware.h>
33 #define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
34 static void _dump_mmio_region(const struct ps3_mmio_region* r,
35 const char* func, int line)
37 pr_debug("%s:%d: dev %u:%u\n", func, line, r->did.bus_id,
39 pr_debug("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
40 pr_debug("%s:%d: len %lxh\n", func, line, r->len);
41 pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
44 int ps3_mmio_region_create(struct ps3_mmio_region *r)
48 result = lv1_map_device_mmio_region(r->did.bus_id, r->did.dev_id,
49 r->bus_addr, r->len, r->page_size, &r->lpar_addr);
52 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
53 __func__, __LINE__, ps3_result(result));
61 int ps3_free_mmio_region(struct ps3_mmio_region *r)
65 result = lv1_unmap_device_mmio_region(r->did.bus_id, r->did.dev_id,
69 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
70 __func__, __LINE__, ps3_result(result));
76 static int ps3_system_bus_match(struct device *_dev,
77 struct device_driver *_drv)
80 struct ps3_system_bus_driver *drv = to_ps3_system_bus_driver(_drv);
81 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
83 result = dev->match_id == drv->match_id;
85 pr_info("%s:%d: dev=%u(%s), drv=%u(%s): %s\n", __func__, __LINE__,
86 dev->match_id, dev->core.bus_id, drv->match_id, drv->core.name,
87 (result ? "match" : "miss"));
91 static int ps3_system_bus_probe(struct device *_dev)
94 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
95 struct ps3_system_bus_driver *drv =
96 to_ps3_system_bus_driver(_dev->driver);
98 result = lv1_open_device(dev->did.bus_id, dev->did.dev_id, 0);
101 pr_debug("%s:%d: lv1_open_device failed (%d)\n",
102 __func__, __LINE__, result);
107 if (dev->d_region->did.bus_id) {
108 result = ps3_dma_region_create(dev->d_region);
111 pr_debug("%s:%d: ps3_dma_region_create failed (%d)\n",
112 __func__, __LINE__, result);
113 BUG_ON("check region type");
122 result = drv->probe(dev);
124 pr_info("%s:%d: %s no probe method\n", __func__, __LINE__,
128 pr_debug("%s:%d: drv->probe failed\n", __func__, __LINE__);
135 ps3_dma_region_free(dev->d_region);
137 lv1_close_device(dev->did.bus_id, dev->did.dev_id);
142 static int ps3_system_bus_remove(struct device *_dev)
144 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
145 struct ps3_system_bus_driver *drv =
146 to_ps3_system_bus_driver(_dev->driver);
151 pr_info("%s:%d: %s no remove method\n", __func__, __LINE__,
154 ps3_dma_region_free(dev->d_region);
155 ps3_free_mmio_region(dev->m_region);
156 lv1_close_device(dev->did.bus_id, dev->did.dev_id);
161 struct bus_type ps3_system_bus_type = {
162 .name = "ps3_system_bus",
163 .match = ps3_system_bus_match,
164 .probe = ps3_system_bus_probe,
165 .remove = ps3_system_bus_remove,
168 int __init ps3_system_bus_init(void)
172 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
175 result = bus_register(&ps3_system_bus_type);
180 core_initcall(ps3_system_bus_init);
182 /* Allocates a contiguous real buffer and creates mappings over it.
183 * Returns the virtual address of the buffer and sets dma_handle
184 * to the dma address (mapping) of the first page.
187 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
188 dma_addr_t *dma_handle, gfp_t flag)
191 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
192 unsigned long virt_addr;
194 BUG_ON(!dev->d_region->bus_addr);
196 flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
199 virt_addr = __get_free_pages(flag, get_order(size));
202 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
206 result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle);
209 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
210 __func__, __LINE__, result);
211 BUG_ON("check region type");
215 return (void*)virt_addr;
218 free_pages(virt_addr, get_order(size));
224 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
225 dma_addr_t dma_handle)
227 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
229 ps3_dma_unmap(dev->d_region, dma_handle, size);
230 free_pages((unsigned long)vaddr, get_order(size));
233 /* Creates TCEs for a user provided buffer. The user buffer must be
234 * contiguous real kernel storage (not vmalloc). The address of the buffer
235 * passed here is the kernel (virtual) address of the buffer. The buffer
236 * need not be page aligned, the dma_addr_t returned will point to the same
237 * byte within the page as vaddr.
240 static dma_addr_t ps3_map_single(struct device *_dev, void *ptr, size_t size,
241 enum dma_data_direction direction)
243 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
245 unsigned long bus_addr;
247 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
251 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
252 __func__, __LINE__, result);
258 static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
259 size_t size, enum dma_data_direction direction)
261 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
264 result = ps3_dma_unmap(dev->d_region, dma_addr, size);
267 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
268 __func__, __LINE__, result);
272 static int ps3_map_sg(struct device *_dev, struct scatterlist *sg, int nents,
273 enum dma_data_direction direction)
275 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
278 #if defined(CONFIG_PS3_DYNAMIC_DMA)
282 for (i = 0; i < nents; i++, sg++) {
283 int result = ps3_dma_map(dev->d_region,
284 page_to_phys(sg->page) + sg->offset, sg->length,
288 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
289 __func__, __LINE__, result);
293 sg->dma_length = sg->length;
300 static void ps3_unmap_sg(struct device *_dev, struct scatterlist *sg,
301 int nents, enum dma_data_direction direction)
303 #if defined(CONFIG_PS3_DYNAMIC_DMA)
308 static int ps3_dma_supported(struct device *_dev, u64 mask)
310 return mask >= DMA_32BIT_MASK;
313 static struct dma_mapping_ops ps3_dma_ops = {
314 .alloc_coherent = ps3_alloc_coherent,
315 .free_coherent = ps3_free_coherent,
316 .map_single = ps3_map_single,
317 .unmap_single = ps3_unmap_single,
318 .map_sg = ps3_map_sg,
319 .unmap_sg = ps3_unmap_sg,
320 .dma_supported = ps3_dma_supported
324 * ps3_system_bus_release_device - remove a device from the system bus
327 static void ps3_system_bus_release_device(struct device *_dev)
329 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
334 * ps3_system_bus_device_register - add a device to the system bus
336 * ps3_system_bus_device_register() expects the dev object to be allocated
337 * dynamically by the caller. The system bus takes ownership of the dev
338 * object and frees the object in ps3_system_bus_release_device().
341 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
344 static unsigned int dev_count = 1;
346 dev->core.parent = NULL;
347 dev->core.bus = &ps3_system_bus_type;
348 dev->core.release = ps3_system_bus_release_device;
350 dev->core.archdata.of_node = NULL;
351 dev->core.archdata.dma_ops = &ps3_dma_ops;
352 dev->core.archdata.numa_node = 0;
354 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), "sb_%02x",
357 pr_debug("%s:%d add %s\n", __func__, __LINE__, dev->core.bus_id);
359 result = device_register(&dev->core);
363 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
365 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
369 drv->core.bus = &ps3_system_bus_type;
371 result = driver_register(&drv->core);
375 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
377 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
379 driver_unregister(&drv->core);
382 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);