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28#include "qemu/osdep.h"
29#include "hw/irq.h"
30#include "hw/qdev-properties.h"
31#include "hw/sparc/sparc32_dma.h"
32#include "hw/sparc/sun4m_iommu.h"
33#include "hw/sysbus.h"
34#include "migration/vmstate.h"
35#include "sysemu/dma.h"
36#include "qapi/error.h"
37#include "qemu/module.h"
38#include "trace.h"
39
40
41
42
43
44
45
46
47
48#define DMA_SIZE (4 * sizeof(uint32_t))
49
50
51#define DMA_MASK (DMA_SIZE - 1)
52
53#define DMA_ETH_SIZE (8 * sizeof(uint32_t))
54#define DMA_MAX_REG_OFFSET (2 * DMA_SIZE - 1)
55
56#define DMA_VER 0xa0000000
57#define DMA_INTR 1
58#define DMA_INTREN 0x10
59#define DMA_WRITE_MEM 0x100
60#define DMA_EN 0x200
61#define DMA_LOADED 0x04000000
62#define DMA_DRAIN_FIFO 0x40
63#define DMA_RESET 0x80
64
65
66#define DMA_CSR_RO_MASK 0xfe000007
67
68enum {
69 GPIO_RESET = 0,
70 GPIO_DMA,
71};
72
73
74void ledma_memory_read(void *opaque, hwaddr addr,
75 uint8_t *buf, int len, int do_bswap)
76{
77 DMADeviceState *s = opaque;
78 IOMMUState *is = (IOMMUState *)s->iommu;
79 int i;
80
81 addr |= s->dmaregs[3];
82 trace_ledma_memory_read(addr, len);
83 if (do_bswap) {
84 dma_memory_read(&is->iommu_as, addr, buf, len);
85 } else {
86 addr &= ~1;
87 len &= ~1;
88 dma_memory_read(&is->iommu_as, addr, buf, len);
89 for(i = 0; i < len; i += 2) {
90 bswap16s((uint16_t *)(buf + i));
91 }
92 }
93}
94
95void ledma_memory_write(void *opaque, hwaddr addr,
96 uint8_t *buf, int len, int do_bswap)
97{
98 DMADeviceState *s = opaque;
99 IOMMUState *is = (IOMMUState *)s->iommu;
100 int l, i;
101 uint16_t tmp_buf[32];
102
103 addr |= s->dmaregs[3];
104 trace_ledma_memory_write(addr, len);
105 if (do_bswap) {
106 dma_memory_write(&is->iommu_as, addr, buf, len);
107 } else {
108 addr &= ~1;
109 len &= ~1;
110 while (len > 0) {
111 l = len;
112 if (l > sizeof(tmp_buf))
113 l = sizeof(tmp_buf);
114 for(i = 0; i < l; i += 2) {
115 tmp_buf[i >> 1] = bswap16(*(uint16_t *)(buf + i));
116 }
117 dma_memory_write(&is->iommu_as, addr, tmp_buf, l);
118 len -= l;
119 buf += l;
120 addr += l;
121 }
122 }
123}
124
125static void dma_set_irq(void *opaque, int irq, int level)
126{
127 DMADeviceState *s = opaque;
128 if (level) {
129 s->dmaregs[0] |= DMA_INTR;
130 if (s->dmaregs[0] & DMA_INTREN) {
131 trace_sparc32_dma_set_irq_raise();
132 qemu_irq_raise(s->irq);
133 }
134 } else {
135 if (s->dmaregs[0] & DMA_INTR) {
136 s->dmaregs[0] &= ~DMA_INTR;
137 if (s->dmaregs[0] & DMA_INTREN) {
138 trace_sparc32_dma_set_irq_lower();
139 qemu_irq_lower(s->irq);
140 }
141 }
142 }
143}
144
145void espdma_memory_read(void *opaque, uint8_t *buf, int len)
146{
147 DMADeviceState *s = opaque;
148 IOMMUState *is = (IOMMUState *)s->iommu;
149
150 trace_espdma_memory_read(s->dmaregs[1], len);
151 dma_memory_read(&is->iommu_as, s->dmaregs[1], buf, len);
152 s->dmaregs[1] += len;
153}
154
155void espdma_memory_write(void *opaque, uint8_t *buf, int len)
156{
157 DMADeviceState *s = opaque;
158 IOMMUState *is = (IOMMUState *)s->iommu;
159
160 trace_espdma_memory_write(s->dmaregs[1], len);
161 dma_memory_write(&is->iommu_as, s->dmaregs[1], buf, len);
162 s->dmaregs[1] += len;
163}
164
165static uint64_t dma_mem_read(void *opaque, hwaddr addr,
166 unsigned size)
167{
168 DMADeviceState *s = opaque;
169 uint32_t saddr;
170
171 saddr = (addr & DMA_MASK) >> 2;
172 trace_sparc32_dma_mem_readl(addr, s->dmaregs[saddr]);
173 return s->dmaregs[saddr];
174}
175
176static void dma_mem_write(void *opaque, hwaddr addr,
177 uint64_t val, unsigned size)
178{
179 DMADeviceState *s = opaque;
180 uint32_t saddr;
181
182 saddr = (addr & DMA_MASK) >> 2;
183 trace_sparc32_dma_mem_writel(addr, s->dmaregs[saddr], val);
184 switch (saddr) {
185 case 0:
186 if (val & DMA_INTREN) {
187 if (s->dmaregs[0] & DMA_INTR) {
188 trace_sparc32_dma_set_irq_raise();
189 qemu_irq_raise(s->irq);
190 }
191 } else {
192 if (s->dmaregs[0] & (DMA_INTR | DMA_INTREN)) {
193 trace_sparc32_dma_set_irq_lower();
194 qemu_irq_lower(s->irq);
195 }
196 }
197 if (val & DMA_RESET) {
198 qemu_irq_raise(s->gpio[GPIO_RESET]);
199 qemu_irq_lower(s->gpio[GPIO_RESET]);
200 } else if (val & DMA_DRAIN_FIFO) {
201 val &= ~DMA_DRAIN_FIFO;
202 } else if (val == 0)
203 val = DMA_DRAIN_FIFO;
204
205 if (val & DMA_EN && !(s->dmaregs[0] & DMA_EN)) {
206 trace_sparc32_dma_enable_raise();
207 qemu_irq_raise(s->gpio[GPIO_DMA]);
208 } else if (!(val & DMA_EN) && !!(s->dmaregs[0] & DMA_EN)) {
209 trace_sparc32_dma_enable_lower();
210 qemu_irq_lower(s->gpio[GPIO_DMA]);
211 }
212
213 val &= ~DMA_CSR_RO_MASK;
214 val |= DMA_VER;
215 s->dmaregs[0] = (s->dmaregs[0] & DMA_CSR_RO_MASK) | val;
216 break;
217 case 1:
218 s->dmaregs[0] |= DMA_LOADED;
219
220 default:
221 s->dmaregs[saddr] = val;
222 break;
223 }
224}
225
226static const MemoryRegionOps dma_mem_ops = {
227 .read = dma_mem_read,
228 .write = dma_mem_write,
229 .endianness = DEVICE_NATIVE_ENDIAN,
230 .valid = {
231 .min_access_size = 4,
232 .max_access_size = 4,
233 },
234};
235
236static void sparc32_dma_device_reset(DeviceState *d)
237{
238 DMADeviceState *s = SPARC32_DMA_DEVICE(d);
239
240 memset(s->dmaregs, 0, DMA_SIZE);
241 s->dmaregs[0] = DMA_VER;
242}
243
244static const VMStateDescription vmstate_sparc32_dma_device = {
245 .name ="sparc32_dma",
246 .version_id = 2,
247 .minimum_version_id = 2,
248 .fields = (VMStateField[]) {
249 VMSTATE_UINT32_ARRAY(dmaregs, DMADeviceState, DMA_REGS),
250 VMSTATE_END_OF_LIST()
251 }
252};
253
254static void sparc32_dma_device_init(Object *obj)
255{
256 DeviceState *dev = DEVICE(obj);
257 DMADeviceState *s = SPARC32_DMA_DEVICE(obj);
258 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
259
260 sysbus_init_irq(sbd, &s->irq);
261
262 sysbus_init_mmio(sbd, &s->iomem);
263
264 object_property_add_link(OBJECT(dev), "iommu", TYPE_SUN4M_IOMMU,
265 (Object **) &s->iommu,
266 qdev_prop_allow_set_link_before_realize,
267 0);
268
269 qdev_init_gpio_in(dev, dma_set_irq, 1);
270 qdev_init_gpio_out(dev, s->gpio, 2);
271}
272
273static void sparc32_dma_device_class_init(ObjectClass *klass, void *data)
274{
275 DeviceClass *dc = DEVICE_CLASS(klass);
276
277 dc->reset = sparc32_dma_device_reset;
278 dc->vmsd = &vmstate_sparc32_dma_device;
279}
280
281static const TypeInfo sparc32_dma_device_info = {
282 .name = TYPE_SPARC32_DMA_DEVICE,
283 .parent = TYPE_SYS_BUS_DEVICE,
284 .abstract = true,
285 .instance_size = sizeof(DMADeviceState),
286 .instance_init = sparc32_dma_device_init,
287 .class_init = sparc32_dma_device_class_init,
288};
289
290static void sparc32_espdma_device_init(Object *obj)
291{
292 DMADeviceState *s = SPARC32_DMA_DEVICE(obj);
293 ESPDMADeviceState *es = SPARC32_ESPDMA_DEVICE(obj);
294
295 memory_region_init_io(&s->iomem, OBJECT(s), &dma_mem_ops, s,
296 "espdma-mmio", DMA_SIZE);
297
298 object_initialize_child(obj, "esp", &es->esp, TYPE_ESP);
299}
300
301static void sparc32_espdma_device_realize(DeviceState *dev, Error **errp)
302{
303 ESPDMADeviceState *es = SPARC32_ESPDMA_DEVICE(dev);
304 SysBusESPState *sysbus = ESP(&es->esp);
305 ESPState *esp = &sysbus->esp;
306
307 esp->dma_memory_read = espdma_memory_read;
308 esp->dma_memory_write = espdma_memory_write;
309 esp->dma_opaque = SPARC32_DMA_DEVICE(dev);
310 sysbus->it_shift = 2;
311 esp->dma_enabled = 1;
312 sysbus_realize(SYS_BUS_DEVICE(sysbus), &error_fatal);
313}
314
315static void sparc32_espdma_device_class_init(ObjectClass *klass, void *data)
316{
317 DeviceClass *dc = DEVICE_CLASS(klass);
318
319 dc->realize = sparc32_espdma_device_realize;
320}
321
322static const TypeInfo sparc32_espdma_device_info = {
323 .name = TYPE_SPARC32_ESPDMA_DEVICE,
324 .parent = TYPE_SPARC32_DMA_DEVICE,
325 .instance_size = sizeof(ESPDMADeviceState),
326 .instance_init = sparc32_espdma_device_init,
327 .class_init = sparc32_espdma_device_class_init,
328};
329
330static void sparc32_ledma_device_init(Object *obj)
331{
332 DMADeviceState *s = SPARC32_DMA_DEVICE(obj);
333 LEDMADeviceState *ls = SPARC32_LEDMA_DEVICE(obj);
334
335 memory_region_init_io(&s->iomem, OBJECT(s), &dma_mem_ops, s,
336 "ledma-mmio", DMA_SIZE);
337
338 object_initialize_child(obj, "lance", &ls->lance, TYPE_LANCE);
339}
340
341static void sparc32_ledma_device_realize(DeviceState *dev, Error **errp)
342{
343 LEDMADeviceState *s = SPARC32_LEDMA_DEVICE(dev);
344 SysBusPCNetState *lance = SYSBUS_PCNET(&s->lance);
345
346 object_property_set_link(OBJECT(lance), "dma", OBJECT(dev), &error_abort);
347 sysbus_realize(SYS_BUS_DEVICE(lance), &error_fatal);
348}
349
350static void sparc32_ledma_device_class_init(ObjectClass *klass, void *data)
351{
352 DeviceClass *dc = DEVICE_CLASS(klass);
353
354 dc->realize = sparc32_ledma_device_realize;
355}
356
357static const TypeInfo sparc32_ledma_device_info = {
358 .name = TYPE_SPARC32_LEDMA_DEVICE,
359 .parent = TYPE_SPARC32_DMA_DEVICE,
360 .instance_size = sizeof(LEDMADeviceState),
361 .instance_init = sparc32_ledma_device_init,
362 .class_init = sparc32_ledma_device_class_init,
363};
364
365static void sparc32_dma_realize(DeviceState *dev, Error **errp)
366{
367 SPARC32DMAState *s = SPARC32_DMA(dev);
368 DeviceState *espdma, *esp, *ledma, *lance;
369 SysBusDevice *sbd;
370 Object *iommu;
371
372 iommu = object_resolve_path_type("", TYPE_SUN4M_IOMMU, NULL);
373 if (!iommu) {
374 error_setg(errp, "unable to locate sun4m IOMMU device");
375 return;
376 }
377
378 espdma = DEVICE(&s->espdma);
379 object_property_set_link(OBJECT(espdma), "iommu", iommu, &error_abort);
380 sysbus_realize(SYS_BUS_DEVICE(espdma), &error_fatal);
381
382 esp = DEVICE(object_resolve_path_component(OBJECT(espdma), "esp"));
383 sbd = SYS_BUS_DEVICE(esp);
384 sysbus_connect_irq(sbd, 0, qdev_get_gpio_in(espdma, 0));
385 qdev_connect_gpio_out(espdma, 0, qdev_get_gpio_in(esp, 0));
386 qdev_connect_gpio_out(espdma, 1, qdev_get_gpio_in(esp, 1));
387
388 sbd = SYS_BUS_DEVICE(espdma);
389 memory_region_add_subregion(&s->dmamem, 0x0,
390 sysbus_mmio_get_region(sbd, 0));
391
392 ledma = DEVICE(&s->ledma);
393 object_property_set_link(OBJECT(ledma), "iommu", iommu, &error_abort);
394 sysbus_realize(SYS_BUS_DEVICE(ledma), &error_fatal);
395
396 lance = DEVICE(object_resolve_path_component(OBJECT(ledma), "lance"));
397 sbd = SYS_BUS_DEVICE(lance);
398 sysbus_connect_irq(sbd, 0, qdev_get_gpio_in(ledma, 0));
399 qdev_connect_gpio_out(ledma, 0, qdev_get_gpio_in(lance, 0));
400
401 sbd = SYS_BUS_DEVICE(ledma);
402 memory_region_add_subregion(&s->dmamem, 0x10,
403 sysbus_mmio_get_region(sbd, 0));
404
405
406 memory_region_init_alias(&s->ledma_alias, OBJECT(dev), "ledma-alias",
407 sysbus_mmio_get_region(sbd, 0), 0x4, 0x4);
408 memory_region_add_subregion(&s->dmamem, 0x20, &s->ledma_alias);
409}
410
411static void sparc32_dma_init(Object *obj)
412{
413 SPARC32DMAState *s = SPARC32_DMA(obj);
414 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
415
416 memory_region_init(&s->dmamem, OBJECT(s), "dma", DMA_SIZE + DMA_ETH_SIZE);
417 sysbus_init_mmio(sbd, &s->dmamem);
418
419 object_initialize_child(obj, "espdma", &s->espdma,
420 TYPE_SPARC32_ESPDMA_DEVICE);
421 object_initialize_child(obj, "ledma", &s->ledma,
422 TYPE_SPARC32_LEDMA_DEVICE);
423}
424
425static void sparc32_dma_class_init(ObjectClass *klass, void *data)
426{
427 DeviceClass *dc = DEVICE_CLASS(klass);
428
429 dc->realize = sparc32_dma_realize;
430}
431
432static const TypeInfo sparc32_dma_info = {
433 .name = TYPE_SPARC32_DMA,
434 .parent = TYPE_SYS_BUS_DEVICE,
435 .instance_size = sizeof(SPARC32DMAState),
436 .instance_init = sparc32_dma_init,
437 .class_init = sparc32_dma_class_init,
438};
439
440
441static void sparc32_dma_register_types(void)
442{
443 type_register_static(&sparc32_dma_device_info);
444 type_register_static(&sparc32_espdma_device_info);
445 type_register_static(&sparc32_ledma_device_info);
446 type_register_static(&sparc32_dma_info);
447}
448
449type_init(sparc32_dma_register_types)
450
