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5b3b1688 DD |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com> | |
7 | * Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org> | |
8 | * Copyright (C) 2005 Ilya A. Volynets-Evenbakh <ilya@total-knowledge.com> | |
9 | * swiped from i386, and cloned for MIPS by Geert, polished by Ralf. | |
10 | * IP32 changes by Ilya. | |
b93b2abc | 11 | * Copyright (C) 2010 Cavium Networks, Inc. |
5b3b1688 | 12 | */ |
e8635b48 | 13 | #include <linux/dma-mapping.h> |
e8635b48 | 14 | #include <linux/scatterlist.h> |
b93b2abc | 15 | #include <linux/bootmem.h> |
cae39d13 | 16 | #include <linux/export.h> |
b93b2abc DD |
17 | #include <linux/swiotlb.h> |
18 | #include <linux/types.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/mm.h> | |
e8635b48 | 21 | |
b93b2abc | 22 | #include <asm/bootinfo.h> |
e8635b48 DD |
23 | |
24 | #include <asm/octeon/octeon.h> | |
b93b2abc DD |
25 | |
26 | #ifdef CONFIG_PCI | |
27 | #include <asm/octeon/pci-octeon.h> | |
e8635b48 DD |
28 | #include <asm/octeon/cvmx-npi-defs.h> |
29 | #include <asm/octeon/cvmx-pci-defs.h> | |
5b3b1688 | 30 | |
b93b2abc DD |
31 | static dma_addr_t octeon_hole_phys_to_dma(phys_addr_t paddr) |
32 | { | |
33 | if (paddr >= CVMX_PCIE_BAR1_PHYS_BASE && paddr < (CVMX_PCIE_BAR1_PHYS_BASE + CVMX_PCIE_BAR1_PHYS_SIZE)) | |
34 | return paddr - CVMX_PCIE_BAR1_PHYS_BASE + CVMX_PCIE_BAR1_RC_BASE; | |
35 | else | |
36 | return paddr; | |
37 | } | |
5b3b1688 | 38 | |
b93b2abc DD |
39 | static phys_addr_t octeon_hole_dma_to_phys(dma_addr_t daddr) |
40 | { | |
41 | if (daddr >= CVMX_PCIE_BAR1_RC_BASE) | |
42 | return daddr + CVMX_PCIE_BAR1_PHYS_BASE - CVMX_PCIE_BAR1_RC_BASE; | |
43 | else | |
44 | return daddr; | |
45 | } | |
46 | ||
47 | static dma_addr_t octeon_gen1_phys_to_dma(struct device *dev, phys_addr_t paddr) | |
48 | { | |
49 | if (paddr >= 0x410000000ull && paddr < 0x420000000ull) | |
50 | paddr -= 0x400000000ull; | |
51 | return octeon_hole_phys_to_dma(paddr); | |
52 | } | |
e8635b48 | 53 | |
b93b2abc DD |
54 | static phys_addr_t octeon_gen1_dma_to_phys(struct device *dev, dma_addr_t daddr) |
55 | { | |
56 | daddr = octeon_hole_dma_to_phys(daddr); | |
e8635b48 | 57 | |
b93b2abc DD |
58 | if (daddr >= 0x10000000ull && daddr < 0x20000000ull) |
59 | daddr += 0x400000000ull; | |
e8635b48 | 60 | |
b93b2abc DD |
61 | return daddr; |
62 | } | |
e8635b48 | 63 | |
714c1f5c DD |
64 | static dma_addr_t octeon_gen2_phys_to_dma(struct device *dev, phys_addr_t paddr) |
65 | { | |
66 | return octeon_hole_phys_to_dma(paddr); | |
67 | } | |
68 | ||
69 | static phys_addr_t octeon_gen2_dma_to_phys(struct device *dev, dma_addr_t daddr) | |
70 | { | |
71 | return octeon_hole_dma_to_phys(daddr); | |
72 | } | |
73 | ||
b93b2abc | 74 | static dma_addr_t octeon_big_phys_to_dma(struct device *dev, phys_addr_t paddr) |
5b3b1688 | 75 | { |
b93b2abc DD |
76 | if (paddr >= 0x410000000ull && paddr < 0x420000000ull) |
77 | paddr -= 0x400000000ull; | |
78 | ||
79 | /* Anything in the BAR1 hole or above goes via BAR2 */ | |
80 | if (paddr >= 0xf0000000ull) | |
81 | paddr = OCTEON_BAR2_PCI_ADDRESS + paddr; | |
82 | ||
83 | return paddr; | |
84 | } | |
85 | ||
86 | static phys_addr_t octeon_big_dma_to_phys(struct device *dev, dma_addr_t daddr) | |
87 | { | |
88 | if (daddr >= OCTEON_BAR2_PCI_ADDRESS) | |
89 | daddr -= OCTEON_BAR2_PCI_ADDRESS; | |
90 | ||
91 | if (daddr >= 0x10000000ull && daddr < 0x20000000ull) | |
92 | daddr += 0x400000000ull; | |
93 | return daddr; | |
94 | } | |
95 | ||
96 | static dma_addr_t octeon_small_phys_to_dma(struct device *dev, | |
97 | phys_addr_t paddr) | |
98 | { | |
99 | if (paddr >= 0x410000000ull && paddr < 0x420000000ull) | |
100 | paddr -= 0x400000000ull; | |
101 | ||
102 | /* Anything not in the BAR1 range goes via BAR2 */ | |
103 | if (paddr >= octeon_bar1_pci_phys && paddr < octeon_bar1_pci_phys + 0x8000000ull) | |
104 | paddr = paddr - octeon_bar1_pci_phys; | |
105 | else | |
106 | paddr = OCTEON_BAR2_PCI_ADDRESS + paddr; | |
107 | ||
108 | return paddr; | |
109 | } | |
110 | ||
111 | static phys_addr_t octeon_small_dma_to_phys(struct device *dev, | |
112 | dma_addr_t daddr) | |
113 | { | |
114 | if (daddr >= OCTEON_BAR2_PCI_ADDRESS) | |
115 | daddr -= OCTEON_BAR2_PCI_ADDRESS; | |
116 | else | |
117 | daddr += octeon_bar1_pci_phys; | |
118 | ||
119 | if (daddr >= 0x10000000ull && daddr < 0x20000000ull) | |
120 | daddr += 0x400000000ull; | |
121 | return daddr; | |
122 | } | |
123 | ||
124 | #endif /* CONFIG_PCI */ | |
125 | ||
126 | static dma_addr_t octeon_dma_map_page(struct device *dev, struct page *page, | |
127 | unsigned long offset, size_t size, enum dma_data_direction direction, | |
128 | struct dma_attrs *attrs) | |
129 | { | |
130 | dma_addr_t daddr = swiotlb_map_page(dev, page, offset, size, | |
131 | direction, attrs); | |
5b3b1688 | 132 | mb(); |
e8635b48 | 133 | |
b93b2abc DD |
134 | return daddr; |
135 | } | |
136 | ||
137 | static int octeon_dma_map_sg(struct device *dev, struct scatterlist *sg, | |
138 | int nents, enum dma_data_direction direction, struct dma_attrs *attrs) | |
139 | { | |
140 | int r = swiotlb_map_sg_attrs(dev, sg, nents, direction, attrs); | |
e8635b48 | 141 | mb(); |
b93b2abc DD |
142 | return r; |
143 | } | |
e8635b48 | 144 | |
b93b2abc DD |
145 | static void octeon_dma_sync_single_for_device(struct device *dev, |
146 | dma_addr_t dma_handle, size_t size, enum dma_data_direction direction) | |
147 | { | |
148 | swiotlb_sync_single_for_device(dev, dma_handle, size, direction); | |
149 | mb(); | |
150 | } | |
e8635b48 | 151 | |
b93b2abc DD |
152 | static void octeon_dma_sync_sg_for_device(struct device *dev, |
153 | struct scatterlist *sg, int nelems, enum dma_data_direction direction) | |
154 | { | |
155 | swiotlb_sync_sg_for_device(dev, sg, nelems, direction); | |
156 | mb(); | |
157 | } | |
e8635b48 | 158 | |
b93b2abc | 159 | static void *octeon_dma_alloc_coherent(struct device *dev, size_t size, |
e8d51e54 | 160 | dma_addr_t *dma_handle, gfp_t gfp, struct dma_attrs *attrs) |
b93b2abc DD |
161 | { |
162 | void *ret; | |
e8635b48 | 163 | |
b93b2abc DD |
164 | if (dma_alloc_from_coherent(dev, size, dma_handle, &ret)) |
165 | return ret; | |
166 | ||
167 | /* ignore region specifiers */ | |
168 | gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM); | |
169 | ||
170 | #ifdef CONFIG_ZONE_DMA | |
171 | if (dev == NULL) | |
172 | gfp |= __GFP_DMA; | |
173 | else if (dev->coherent_dma_mask <= DMA_BIT_MASK(24)) | |
174 | gfp |= __GFP_DMA; | |
175 | else | |
e8635b48 | 176 | #endif |
b93b2abc DD |
177 | #ifdef CONFIG_ZONE_DMA32 |
178 | if (dev->coherent_dma_mask <= DMA_BIT_MASK(32)) | |
179 | gfp |= __GFP_DMA32; | |
180 | else | |
181 | #endif | |
182 | ; | |
e8635b48 | 183 | |
b93b2abc DD |
184 | /* Don't invoke OOM killer */ |
185 | gfp |= __GFP_NORETRY; | |
e8635b48 | 186 | |
b93b2abc | 187 | ret = swiotlb_alloc_coherent(dev, size, dma_handle, gfp); |
e8635b48 | 188 | |
b93b2abc | 189 | mb(); |
e8635b48 | 190 | |
b93b2abc DD |
191 | return ret; |
192 | } | |
e8635b48 | 193 | |
b93b2abc | 194 | static void octeon_dma_free_coherent(struct device *dev, size_t size, |
e8d51e54 | 195 | void *vaddr, dma_addr_t dma_handle, struct dma_attrs *attrs) |
b93b2abc DD |
196 | { |
197 | int order = get_order(size); | |
e8635b48 | 198 | |
b93b2abc DD |
199 | if (dma_release_from_coherent(dev, order, vaddr)) |
200 | return; | |
201 | ||
202 | swiotlb_free_coherent(dev, size, vaddr, dma_handle); | |
5b3b1688 DD |
203 | } |
204 | ||
b93b2abc | 205 | static dma_addr_t octeon_unity_phys_to_dma(struct device *dev, phys_addr_t paddr) |
5b3b1688 | 206 | { |
b93b2abc DD |
207 | return paddr; |
208 | } | |
e8635b48 | 209 | |
b93b2abc DD |
210 | static phys_addr_t octeon_unity_dma_to_phys(struct device *dev, dma_addr_t daddr) |
211 | { | |
212 | return daddr; | |
213 | } | |
214 | ||
215 | struct octeon_dma_map_ops { | |
216 | struct dma_map_ops dma_map_ops; | |
217 | dma_addr_t (*phys_to_dma)(struct device *dev, phys_addr_t paddr); | |
218 | phys_addr_t (*dma_to_phys)(struct device *dev, dma_addr_t daddr); | |
219 | }; | |
220 | ||
221 | dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) | |
222 | { | |
223 | struct octeon_dma_map_ops *ops = container_of(get_dma_ops(dev), | |
224 | struct octeon_dma_map_ops, | |
225 | dma_map_ops); | |
226 | ||
227 | return ops->phys_to_dma(dev, paddr); | |
228 | } | |
229 | EXPORT_SYMBOL(phys_to_dma); | |
230 | ||
231 | phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) | |
232 | { | |
233 | struct octeon_dma_map_ops *ops = container_of(get_dma_ops(dev), | |
234 | struct octeon_dma_map_ops, | |
235 | dma_map_ops); | |
236 | ||
237 | return ops->dma_to_phys(dev, daddr); | |
238 | } | |
239 | EXPORT_SYMBOL(dma_to_phys); | |
240 | ||
241 | static struct octeon_dma_map_ops octeon_linear_dma_map_ops = { | |
242 | .dma_map_ops = { | |
e8d51e54 AP |
243 | .alloc = octeon_dma_alloc_coherent, |
244 | .free = octeon_dma_free_coherent, | |
b93b2abc DD |
245 | .map_page = octeon_dma_map_page, |
246 | .unmap_page = swiotlb_unmap_page, | |
247 | .map_sg = octeon_dma_map_sg, | |
248 | .unmap_sg = swiotlb_unmap_sg_attrs, | |
249 | .sync_single_for_cpu = swiotlb_sync_single_for_cpu, | |
250 | .sync_single_for_device = octeon_dma_sync_single_for_device, | |
251 | .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, | |
252 | .sync_sg_for_device = octeon_dma_sync_sg_for_device, | |
253 | .mapping_error = swiotlb_dma_mapping_error, | |
254 | .dma_supported = swiotlb_dma_supported | |
255 | }, | |
256 | .phys_to_dma = octeon_unity_phys_to_dma, | |
257 | .dma_to_phys = octeon_unity_dma_to_phys | |
258 | }; | |
259 | ||
260 | char *octeon_swiotlb; | |
261 | ||
262 | void __init plat_swiotlb_setup(void) | |
263 | { | |
264 | int i; | |
265 | phys_t max_addr; | |
266 | phys_t addr_size; | |
267 | size_t swiotlbsize; | |
268 | unsigned long swiotlb_nslabs; | |
269 | ||
270 | max_addr = 0; | |
271 | addr_size = 0; | |
272 | ||
273 | for (i = 0 ; i < boot_mem_map.nr_map; i++) { | |
274 | struct boot_mem_map_entry *e = &boot_mem_map.map[i]; | |
714c1f5c | 275 | if (e->type != BOOT_MEM_RAM && e->type != BOOT_MEM_INIT_RAM) |
b93b2abc DD |
276 | continue; |
277 | ||
278 | /* These addresses map low for PCI. */ | |
714c1f5c | 279 | if (e->addr > 0x410000000ull && !OCTEON_IS_MODEL(OCTEON_CN6XXX)) |
b93b2abc DD |
280 | continue; |
281 | ||
282 | addr_size += e->size; | |
283 | ||
284 | if (max_addr < e->addr + e->size) | |
285 | max_addr = e->addr + e->size; | |
286 | ||
287 | } | |
288 | ||
289 | swiotlbsize = PAGE_SIZE; | |
290 | ||
291 | #ifdef CONFIG_PCI | |
e8635b48 | 292 | /* |
b93b2abc DD |
293 | * For OCTEON_DMA_BAR_TYPE_SMALL, size the iotlb at 1/4 memory |
294 | * size to a maximum of 64MB | |
e8635b48 | 295 | */ |
b93b2abc DD |
296 | if (OCTEON_IS_MODEL(OCTEON_CN31XX) |
297 | || OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2)) { | |
298 | swiotlbsize = addr_size / 4; | |
299 | if (swiotlbsize > 64 * (1<<20)) | |
300 | swiotlbsize = 64 * (1<<20); | |
301 | } else if (max_addr > 0xf0000000ul) { | |
302 | /* | |
303 | * Otherwise only allocate a big iotlb if there is | |
304 | * memory past the BAR1 hole. | |
305 | */ | |
306 | swiotlbsize = 64 * (1<<20); | |
307 | } | |
714c1f5c DD |
308 | #endif |
309 | #ifdef CONFIG_USB_OCTEON_OHCI | |
310 | /* OCTEON II ohci is only 32-bit. */ | |
311 | if (OCTEON_IS_MODEL(OCTEON_CN6XXX) && max_addr >= 0x100000000ul) | |
312 | swiotlbsize = 64 * (1<<20); | |
b93b2abc DD |
313 | #endif |
314 | swiotlb_nslabs = swiotlbsize >> IO_TLB_SHIFT; | |
315 | swiotlb_nslabs = ALIGN(swiotlb_nslabs, IO_TLB_SEGSIZE); | |
316 | swiotlbsize = swiotlb_nslabs << IO_TLB_SHIFT; | |
317 | ||
318 | octeon_swiotlb = alloc_bootmem_low_pages(swiotlbsize); | |
e8635b48 | 319 | |
ac2cbab2 YL |
320 | if (swiotlb_init_with_tbl(octeon_swiotlb, swiotlb_nslabs, 1) == -ENOMEM) |
321 | panic("Cannot allocate SWIOTLB buffer"); | |
b93b2abc DD |
322 | |
323 | mips_dma_map_ops = &octeon_linear_dma_map_ops.dma_map_ops; | |
324 | } | |
325 | ||
326 | #ifdef CONFIG_PCI | |
327 | static struct octeon_dma_map_ops _octeon_pci_dma_map_ops = { | |
328 | .dma_map_ops = { | |
e8d51e54 AP |
329 | .alloc = octeon_dma_alloc_coherent, |
330 | .free = octeon_dma_free_coherent, | |
b93b2abc DD |
331 | .map_page = octeon_dma_map_page, |
332 | .unmap_page = swiotlb_unmap_page, | |
333 | .map_sg = octeon_dma_map_sg, | |
334 | .unmap_sg = swiotlb_unmap_sg_attrs, | |
335 | .sync_single_for_cpu = swiotlb_sync_single_for_cpu, | |
336 | .sync_single_for_device = octeon_dma_sync_single_for_device, | |
337 | .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, | |
338 | .sync_sg_for_device = octeon_dma_sync_sg_for_device, | |
339 | .mapping_error = swiotlb_dma_mapping_error, | |
340 | .dma_supported = swiotlb_dma_supported | |
341 | }, | |
342 | }; | |
343 | ||
344 | struct dma_map_ops *octeon_pci_dma_map_ops; | |
345 | ||
346 | void __init octeon_pci_dma_init(void) | |
347 | { | |
e8635b48 | 348 | switch (octeon_dma_bar_type) { |
714c1f5c DD |
349 | case OCTEON_DMA_BAR_TYPE_PCIE2: |
350 | _octeon_pci_dma_map_ops.phys_to_dma = octeon_gen2_phys_to_dma; | |
351 | _octeon_pci_dma_map_ops.dma_to_phys = octeon_gen2_dma_to_phys; | |
352 | break; | |
e8635b48 | 353 | case OCTEON_DMA_BAR_TYPE_PCIE: |
b93b2abc DD |
354 | _octeon_pci_dma_map_ops.phys_to_dma = octeon_gen1_phys_to_dma; |
355 | _octeon_pci_dma_map_ops.dma_to_phys = octeon_gen1_dma_to_phys; | |
356 | break; | |
e8635b48 | 357 | case OCTEON_DMA_BAR_TYPE_BIG: |
b93b2abc DD |
358 | _octeon_pci_dma_map_ops.phys_to_dma = octeon_big_phys_to_dma; |
359 | _octeon_pci_dma_map_ops.dma_to_phys = octeon_big_dma_to_phys; | |
e8635b48 | 360 | break; |
e8635b48 | 361 | case OCTEON_DMA_BAR_TYPE_SMALL: |
b93b2abc DD |
362 | _octeon_pci_dma_map_ops.phys_to_dma = octeon_small_phys_to_dma; |
363 | _octeon_pci_dma_map_ops.dma_to_phys = octeon_small_dma_to_phys; | |
e8635b48 | 364 | break; |
e8635b48 | 365 | default: |
b93b2abc | 366 | BUG(); |
e8635b48 | 367 | } |
b93b2abc | 368 | octeon_pci_dma_map_ops = &_octeon_pci_dma_map_ops.dma_map_ops; |
5b3b1688 | 369 | } |
b93b2abc | 370 | #endif /* CONFIG_PCI */ |