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block: Clean up local variable shadowing
[qemu/armbru.git] / hw / ppc / pnv_psi.c
blobdaaa2f0575fd654034855fd2f9f406a6c929a88f
1 /*
2 * QEMU PowerPC PowerNV Processor Service Interface (PSI) model
3 *
4 * Copyright (c) 2015-2017, IBM Corporation.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library 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 GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "exec/address-spaces.h"
22 #include "hw/irq.h"
23 #include "target/ppc/cpu.h"
24 #include "qemu/log.h"
25 #include "qemu/module.h"
26 #include "sysemu/reset.h"
27 #include "qapi/error.h"
28 #include "monitor/monitor.h"
29
30
31 #include "hw/ppc/fdt.h"
32 #include "hw/ppc/pnv.h"
33 #include "hw/ppc/pnv_xscom.h"
34 #include "hw/qdev-properties.h"
35 #include "hw/ppc/pnv_psi.h"
36
37 #include <libfdt.h>
38
39 #define PSIHB_XSCOM_FIR_RW 0x00
40 #define PSIHB_XSCOM_FIR_AND 0x01
41 #define PSIHB_XSCOM_FIR_OR 0x02
42 #define PSIHB_XSCOM_FIRMASK_RW 0x03
43 #define PSIHB_XSCOM_FIRMASK_AND 0x04
44 #define PSIHB_XSCOM_FIRMASK_OR 0x05
45 #define PSIHB_XSCOM_FIRACT0 0x06
46 #define PSIHB_XSCOM_FIRACT1 0x07
47
48 /* Host Bridge Base Address Register */
49 #define PSIHB_XSCOM_BAR 0x0a
50 #define PSIHB_BAR_EN 0x0000000000000001ull
51
52 /* FSP Base Address Register */
53 #define PSIHB_XSCOM_FSPBAR 0x0b
54
55 /* PSI Host Bridge Control/Status Register */
56 #define PSIHB_XSCOM_CR 0x0e
57 #define PSIHB_CR_FSP_CMD_ENABLE 0x8000000000000000ull
58 #define PSIHB_CR_FSP_MMIO_ENABLE 0x4000000000000000ull
59 #define PSIHB_CR_FSP_IRQ_ENABLE 0x1000000000000000ull
60 #define PSIHB_CR_FSP_ERR_RSP_ENABLE 0x0800000000000000ull
61 #define PSIHB_CR_PSI_LINK_ENABLE 0x0400000000000000ull
62 #define PSIHB_CR_FSP_RESET 0x0200000000000000ull
63 #define PSIHB_CR_PSIHB_RESET 0x0100000000000000ull
64 #define PSIHB_CR_PSI_IRQ 0x0000800000000000ull
65 #define PSIHB_CR_FSP_IRQ 0x0000400000000000ull
66 #define PSIHB_CR_FSP_LINK_ACTIVE 0x0000200000000000ull
67 #define PSIHB_CR_IRQ_CMD_EXPECT 0x0000010000000000ull
68 /* and more ... */
69
70 /* PSIHB Status / Error Mask Register */
71 #define PSIHB_XSCOM_SEMR 0x0f
72
73 /* XIVR, to signal interrupts to the CEC firmware. more XIVR below. */
74 #define PSIHB_XSCOM_XIVR_FSP 0x10
75 #define PSIHB_XIVR_SERVER_SH 40
76 #define PSIHB_XIVR_SERVER_MSK (0xffffull << PSIHB_XIVR_SERVER_SH)
77 #define PSIHB_XIVR_PRIO_SH 32
78 #define PSIHB_XIVR_PRIO_MSK (0xffull << PSIHB_XIVR_PRIO_SH)
79 #define PSIHB_XIVR_SRC_SH 29
80 #define PSIHB_XIVR_SRC_MSK (0x7ull << PSIHB_XIVR_SRC_SH)
81 #define PSIHB_XIVR_PENDING 0x01000000ull
82
83 /* PSI Host Bridge Set Control/ Status Register */
84 #define PSIHB_XSCOM_SCR 0x12
85
86 /* PSI Host Bridge Clear Control/ Status Register */
87 #define PSIHB_XSCOM_CCR 0x13
88
89 /* DMA Upper Address Register */
90 #define PSIHB_XSCOM_DMA_UPADD 0x14
91
92 /* Interrupt Status */
93 #define PSIHB_XSCOM_IRQ_STAT 0x15
94 #define PSIHB_IRQ_STAT_OCC 0x0000001000000000ull
95 #define PSIHB_IRQ_STAT_FSI 0x0000000800000000ull
96 #define PSIHB_IRQ_STAT_LPCI2C 0x0000000400000000ull
97 #define PSIHB_IRQ_STAT_LOCERR 0x0000000200000000ull
98 #define PSIHB_IRQ_STAT_EXT 0x0000000100000000ull
99
100 /* remaining XIVR */
101 #define PSIHB_XSCOM_XIVR_OCC 0x16
102 #define PSIHB_XSCOM_XIVR_FSI 0x17
103 #define PSIHB_XSCOM_XIVR_LPCI2C 0x18
104 #define PSIHB_XSCOM_XIVR_LOCERR 0x19
105 #define PSIHB_XSCOM_XIVR_EXT 0x1a
106
107 /* Interrupt Requester Source Compare Register */
108 #define PSIHB_XSCOM_IRSN 0x1b
109 #define PSIHB_IRSN_COMP_SH 45
110 #define PSIHB_IRSN_COMP_MSK (0x7ffffull << PSIHB_IRSN_COMP_SH)
111 #define PSIHB_IRSN_IRQ_MUX 0x0000000800000000ull
112 #define PSIHB_IRSN_IRQ_RESET 0x0000000400000000ull
113 #define PSIHB_IRSN_DOWNSTREAM_EN 0x0000000200000000ull
114 #define PSIHB_IRSN_UPSTREAM_EN 0x0000000100000000ull
115 #define PSIHB_IRSN_COMPMASK_SH 13
116 #define PSIHB_IRSN_COMPMASK_MSK (0x7ffffull << PSIHB_IRSN_COMPMASK_SH)
117
118 #define PSIHB_BAR_MASK 0x0003fffffff00000ull
119 #define PSIHB_FSPBAR_MASK 0x0003ffff00000000ull
120
121 #define PSIHB9_BAR_MASK 0x00fffffffff00000ull
122 #define PSIHB9_FSPBAR_MASK 0x00ffffff00000000ull
123
124 /* mmio address to xscom address */
125 #define PSIHB_REG(addr) (((addr) >> 3) + PSIHB_XSCOM_BAR)
126
127 /* xscom address to mmio address */
128 #define PSIHB_MMIO(reg) ((reg - PSIHB_XSCOM_BAR) << 3)
129
130 static void pnv_psi_set_bar(PnvPsi *psi, uint64_t bar)
131 {
132 PnvPsiClass *ppc = PNV_PSI_GET_CLASS(psi);
133 MemoryRegion *sysmem = get_system_memory();
134 uint64_t old = psi->regs[PSIHB_XSCOM_BAR];
135
136 psi->regs[PSIHB_XSCOM_BAR] = bar & (ppc->bar_mask | PSIHB_BAR_EN);
137
138 /* Update MR, always remove it first */
139 if (old & PSIHB_BAR_EN) {
140 memory_region_del_subregion(sysmem, &psi->regs_mr);
141 }
142
143 /* Then add it back if needed */
144 if (bar & PSIHB_BAR_EN) {
145 uint64_t addr = bar & ppc->bar_mask;
146 memory_region_add_subregion(sysmem, addr, &psi->regs_mr);
147 }
148 }
149
150 static void pnv_psi_update_fsp_mr(PnvPsi *psi)
151 {
152 /* TODO: Update FSP MR if/when we support FSP BAR */
153 }
154
155 static void pnv_psi_set_cr(PnvPsi *psi, uint64_t cr)
156 {
157 uint64_t old = psi->regs[PSIHB_XSCOM_CR];
158
159 psi->regs[PSIHB_XSCOM_CR] = cr;
160
161 /* Check some bit changes */
162 if ((old ^ psi->regs[PSIHB_XSCOM_CR]) & PSIHB_CR_FSP_MMIO_ENABLE) {
163 pnv_psi_update_fsp_mr(psi);
164 }
165 }
166
167 static void pnv_psi_set_irsn(PnvPsi *psi, uint64_t val)
168 {
169 ICSState *ics = &PNV8_PSI(psi)->ics;
170
171 /* In this model we ignore the up/down enable bits for now
172 * as SW doesn't use them (other than setting them at boot).
173 * We ignore IRQ_MUX, its meaning isn't clear and we don't use
174 * it and finally we ignore reset (XXX fix that ?)
175 */
176 psi->regs[PSIHB_XSCOM_IRSN] = val & (PSIHB_IRSN_COMP_MSK |
177 PSIHB_IRSN_IRQ_MUX |
178 PSIHB_IRSN_IRQ_RESET |
179 PSIHB_IRSN_DOWNSTREAM_EN |
180 PSIHB_IRSN_UPSTREAM_EN);
181
182 /* We ignore the compare mask as well, our ICS emulation is too
183 * simplistic to make any use if it, and we extract the offset
184 * from the compare value
185 */
186 ics->offset = (val & PSIHB_IRSN_COMP_MSK) >> PSIHB_IRSN_COMP_SH;
187 }
188
189 /*
190 * FSP and PSI interrupts are muxed under the same number.
191 */
192 static const uint32_t xivr_regs[PSI_NUM_INTERRUPTS] = {
193 [PSIHB_IRQ_FSP] = PSIHB_XSCOM_XIVR_FSP,
194 [PSIHB_IRQ_OCC] = PSIHB_XSCOM_XIVR_OCC,
195 [PSIHB_IRQ_FSI] = PSIHB_XSCOM_XIVR_FSI,
196 [PSIHB_IRQ_LPC_I2C] = PSIHB_XSCOM_XIVR_LPCI2C,
197 [PSIHB_IRQ_LOCAL_ERR] = PSIHB_XSCOM_XIVR_LOCERR,
198 [PSIHB_IRQ_EXTERNAL] = PSIHB_XSCOM_XIVR_EXT,
199 };
200
201 static const uint32_t stat_regs[PSI_NUM_INTERRUPTS] = {
202 [PSIHB_IRQ_FSP] = PSIHB_XSCOM_CR,
203 [PSIHB_IRQ_OCC] = PSIHB_XSCOM_IRQ_STAT,
204 [PSIHB_IRQ_FSI] = PSIHB_XSCOM_IRQ_STAT,
205 [PSIHB_IRQ_LPC_I2C] = PSIHB_XSCOM_IRQ_STAT,
206 [PSIHB_IRQ_LOCAL_ERR] = PSIHB_XSCOM_IRQ_STAT,
207 [PSIHB_IRQ_EXTERNAL] = PSIHB_XSCOM_IRQ_STAT,
208 };
209
210 static const uint64_t stat_bits[PSI_NUM_INTERRUPTS] = {
211 [PSIHB_IRQ_FSP] = PSIHB_CR_FSP_IRQ,
212 [PSIHB_IRQ_OCC] = PSIHB_IRQ_STAT_OCC,
213 [PSIHB_IRQ_FSI] = PSIHB_IRQ_STAT_FSI,
214 [PSIHB_IRQ_LPC_I2C] = PSIHB_IRQ_STAT_LPCI2C,
215 [PSIHB_IRQ_LOCAL_ERR] = PSIHB_IRQ_STAT_LOCERR,
216 [PSIHB_IRQ_EXTERNAL] = PSIHB_IRQ_STAT_EXT,
217 };
218
219 static void pnv_psi_power8_set_irq(void *opaque, int irq, int state)
220 {
221 PnvPsi *psi = opaque;
222 uint32_t xivr_reg;
223 uint32_t stat_reg;
224 uint32_t src;
225 bool masked;
226
227 xivr_reg = xivr_regs[irq];
228 stat_reg = stat_regs[irq];
229
230 src = (psi->regs[xivr_reg] & PSIHB_XIVR_SRC_MSK) >> PSIHB_XIVR_SRC_SH;
231 if (state) {
232 psi->regs[stat_reg] |= stat_bits[irq];
233 /* TODO: optimization, check mask here. That means
234 * re-evaluating when unmasking
235 */
236 qemu_irq_raise(psi->qirqs[src]);
237 } else {
238 psi->regs[stat_reg] &= ~stat_bits[irq];
239
240 /* FSP and PSI are muxed so don't lower if either is still set */
241 if (stat_reg != PSIHB_XSCOM_CR ||
242 !(psi->regs[stat_reg] & (PSIHB_CR_PSI_IRQ | PSIHB_CR_FSP_IRQ))) {
243 qemu_irq_lower(psi->qirqs[src]);
244 } else {
245 state = true;
246 }
247 }
248
249 /* Note about the emulation of the pending bit: This isn't
250 * entirely correct. The pending bit should be cleared when the
251 * EOI has been received. However, we don't have callbacks on EOI
252 * (especially not under KVM) so no way to emulate that properly,
253 * so instead we just set that bit as the logical "output" of the
254 * XIVR (ie pending & !masked)
255 *
256 * CLG: We could define a new ICS object with a custom eoi()
257 * handler to clear the pending bit. But I am not sure this would
258 * be useful for the software anyhow.
259 */
260 masked = (psi->regs[xivr_reg] & PSIHB_XIVR_PRIO_MSK) == PSIHB_XIVR_PRIO_MSK;
261 if (state && !masked) {
262 psi->regs[xivr_reg] |= PSIHB_XIVR_PENDING;
263 } else {
264 psi->regs[xivr_reg] &= ~PSIHB_XIVR_PENDING;
265 }
266 }
267
268 static void pnv_psi_set_xivr(PnvPsi *psi, uint32_t reg, uint64_t val)
269 {
270 ICSState *ics = &PNV8_PSI(psi)->ics;
271 uint16_t server;
272 uint8_t prio;
273 uint8_t src;
274
275 psi->regs[reg] = (psi->regs[reg] & PSIHB_XIVR_PENDING) |
276 (val & (PSIHB_XIVR_SERVER_MSK |
277 PSIHB_XIVR_PRIO_MSK |
278 PSIHB_XIVR_SRC_MSK));
279 val = psi->regs[reg];
280 server = (val & PSIHB_XIVR_SERVER_MSK) >> PSIHB_XIVR_SERVER_SH;
281 prio = (val & PSIHB_XIVR_PRIO_MSK) >> PSIHB_XIVR_PRIO_SH;
282 src = (val & PSIHB_XIVR_SRC_MSK) >> PSIHB_XIVR_SRC_SH;
283
284 if (src >= PSI_NUM_INTERRUPTS) {
285 qemu_log_mask(LOG_GUEST_ERROR, "PSI: Unsupported irq %d\n", src);
286 return;
287 }
288
289 /* Remove pending bit if the IRQ is masked */
290 if ((psi->regs[reg] & PSIHB_XIVR_PRIO_MSK) == PSIHB_XIVR_PRIO_MSK) {
291 psi->regs[reg] &= ~PSIHB_XIVR_PENDING;
292 }
293
294 /* The low order 2 bits are the link pointer (Type II interrupts).
295 * Shift back to get a valid IRQ server.
296 */
297 server >>= 2;
298
299 /* Now because of source remapping, weird things can happen
300 * if you change the source number dynamically, our simple ICS
301 * doesn't deal with remapping. So we just poke a different
302 * ICS entry based on what source number was written. This will
303 * do for now but a more accurate implementation would instead
304 * use a fixed server/prio and a remapper of the generated irq.
305 */
306 ics_write_xive(ics, src, server, prio, prio);
307 }
308
309 static uint64_t pnv_psi_reg_read(PnvPsi *psi, uint32_t offset, bool mmio)
310 {
311 uint64_t val = 0xffffffffffffffffull;
312
313 switch (offset) {
314 case PSIHB_XSCOM_FIR_RW:
315 case PSIHB_XSCOM_FIRACT0:
316 case PSIHB_XSCOM_FIRACT1:
317 case PSIHB_XSCOM_BAR:
318 case PSIHB_XSCOM_FSPBAR:
319 case PSIHB_XSCOM_CR:
320 case PSIHB_XSCOM_XIVR_FSP:
321 case PSIHB_XSCOM_XIVR_OCC:
322 case PSIHB_XSCOM_XIVR_FSI:
323 case PSIHB_XSCOM_XIVR_LPCI2C:
324 case PSIHB_XSCOM_XIVR_LOCERR:
325 case PSIHB_XSCOM_XIVR_EXT:
326 case PSIHB_XSCOM_IRQ_STAT:
327 case PSIHB_XSCOM_SEMR:
328 case PSIHB_XSCOM_DMA_UPADD:
329 case PSIHB_XSCOM_IRSN:
330 val = psi->regs[offset];
331 break;
332 default:
333 qemu_log_mask(LOG_UNIMP, "PSI: read at 0x%" PRIx32 "\n", offset);
334 }
335 return val;
336 }
337
338 static void pnv_psi_reg_write(PnvPsi *psi, uint32_t offset, uint64_t val,
339 bool mmio)
340 {
341 switch (offset) {
342 case PSIHB_XSCOM_FIR_RW:
343 case PSIHB_XSCOM_FIRACT0:
344 case PSIHB_XSCOM_FIRACT1:
345 case PSIHB_XSCOM_SEMR:
346 case PSIHB_XSCOM_DMA_UPADD:
347 psi->regs[offset] = val;
348 break;
349 case PSIHB_XSCOM_FIR_OR:
350 psi->regs[PSIHB_XSCOM_FIR_RW] |= val;
351 break;
352 case PSIHB_XSCOM_FIR_AND:
353 psi->regs[PSIHB_XSCOM_FIR_RW] &= val;
354 break;
355 case PSIHB_XSCOM_BAR:
356 /* Only XSCOM can write this one */
357 if (!mmio) {
358 pnv_psi_set_bar(psi, val);
359 } else {
360 qemu_log_mask(LOG_GUEST_ERROR, "PSI: invalid write of BAR\n");
361 }
362 break;
363 case PSIHB_XSCOM_FSPBAR:
364 psi->regs[PSIHB_XSCOM_FSPBAR] = val & PSIHB_FSPBAR_MASK;
365 pnv_psi_update_fsp_mr(psi);
366 break;
367 case PSIHB_XSCOM_CR:
368 pnv_psi_set_cr(psi, val);
369 break;
370 case PSIHB_XSCOM_SCR:
371 pnv_psi_set_cr(psi, psi->regs[PSIHB_XSCOM_CR] | val);
372 break;
373 case PSIHB_XSCOM_CCR:
374 pnv_psi_set_cr(psi, psi->regs[PSIHB_XSCOM_CR] & ~val);
375 break;
376 case PSIHB_XSCOM_XIVR_FSP:
377 case PSIHB_XSCOM_XIVR_OCC:
378 case PSIHB_XSCOM_XIVR_FSI:
379 case PSIHB_XSCOM_XIVR_LPCI2C:
380 case PSIHB_XSCOM_XIVR_LOCERR:
381 case PSIHB_XSCOM_XIVR_EXT:
382 pnv_psi_set_xivr(psi, offset, val);
383 break;
384 case PSIHB_XSCOM_IRQ_STAT:
385 /* Read only */
386 qemu_log_mask(LOG_GUEST_ERROR, "PSI: invalid write of IRQ_STAT\n");
387 break;
388 case PSIHB_XSCOM_IRSN:
389 pnv_psi_set_irsn(psi, val);
390 break;
391 default:
392 qemu_log_mask(LOG_UNIMP, "PSI: write at 0x%" PRIx32 "\n", offset);
393 }
394 }
395
396 /*
397 * The values of the registers when accessed through the MMIO region
398 * follow the relation : xscom = (mmio + 0x50) >> 3
399 */
400 static uint64_t pnv_psi_mmio_read(void *opaque, hwaddr addr, unsigned size)
401 {
402 return pnv_psi_reg_read(opaque, PSIHB_REG(addr), true);
403 }
404
405 static void pnv_psi_mmio_write(void *opaque, hwaddr addr,
406 uint64_t val, unsigned size)
407 {
408 pnv_psi_reg_write(opaque, PSIHB_REG(addr), val, true);
409 }
410
411 static const MemoryRegionOps psi_mmio_ops = {
412 .read = pnv_psi_mmio_read,
413 .write = pnv_psi_mmio_write,
414 .endianness = DEVICE_BIG_ENDIAN,
415 .valid = {
416 .min_access_size = 8,
417 .max_access_size = 8,
418 },
419 .impl = {
420 .min_access_size = 8,
421 .max_access_size = 8,
422 },
423 };
424
425 static uint64_t pnv_psi_xscom_read(void *opaque, hwaddr addr, unsigned size)
426 {
427 return pnv_psi_reg_read(opaque, addr >> 3, false);
428 }
429
430 static void pnv_psi_xscom_write(void *opaque, hwaddr addr,
431 uint64_t val, unsigned size)
432 {
433 pnv_psi_reg_write(opaque, addr >> 3, val, false);
434 }
435
436 static const MemoryRegionOps pnv_psi_xscom_ops = {
437 .read = pnv_psi_xscom_read,
438 .write = pnv_psi_xscom_write,
439 .endianness = DEVICE_BIG_ENDIAN,
440 .valid = {
441 .min_access_size = 8,
442 .max_access_size = 8,
443 },
444 .impl = {
445 .min_access_size = 8,
446 .max_access_size = 8,
447 }
448 };
449
450 static void pnv_psi_reset(DeviceState *dev)
451 {
452 PnvPsi *psi = PNV_PSI(dev);
453
454 memset(psi->regs, 0x0, sizeof(psi->regs));
455
456 psi->regs[PSIHB_XSCOM_BAR] = psi->bar | PSIHB_BAR_EN;
457 }
458
459 static void pnv_psi_reset_handler(void *dev)
460 {
461 device_cold_reset(DEVICE(dev));
462 }
463
464 static void pnv_psi_realize(DeviceState *dev, Error **errp)
465 {
466 PnvPsi *psi = PNV_PSI(dev);
467
468 /* Default BAR for MMIO region */
469 pnv_psi_set_bar(psi, psi->bar | PSIHB_BAR_EN);
470
471 qemu_register_reset(pnv_psi_reset_handler, dev);
472 }
473
474 static void pnv_psi_power8_instance_init(Object *obj)
475 {
476 Pnv8Psi *psi8 = PNV8_PSI(obj);
477
478 object_initialize_child(obj, "ics-psi", &psi8->ics, TYPE_ICS);
479 object_property_add_alias(obj, ICS_PROP_XICS, OBJECT(&psi8->ics),
480 ICS_PROP_XICS);
481 }
482
483 static const uint8_t irq_to_xivr[] = {
484 PSIHB_XSCOM_XIVR_FSP,
485 PSIHB_XSCOM_XIVR_OCC,
486 PSIHB_XSCOM_XIVR_FSI,
487 PSIHB_XSCOM_XIVR_LPCI2C,
488 PSIHB_XSCOM_XIVR_LOCERR,
489 PSIHB_XSCOM_XIVR_EXT,
490 };
491
492 static void pnv_psi_power8_realize(DeviceState *dev, Error **errp)
493 {
494 PnvPsi *psi = PNV_PSI(dev);
495 ICSState *ics = &PNV8_PSI(psi)->ics;
496 unsigned int i;
497
498 /* Create PSI interrupt control source */
499 if (!object_property_set_int(OBJECT(ics), "nr-irqs", PSI_NUM_INTERRUPTS,
500 errp)) {
501 return;
502 }
503 if (!qdev_realize(DEVICE(ics), NULL, errp)) {
504 return;
505 }
506
507 for (i = 0; i < ics->nr_irqs; i++) {
508 ics_set_irq_type(ics, i, true);
509 }
510
511 qdev_init_gpio_in(dev, pnv_psi_power8_set_irq, ics->nr_irqs);
512
513 psi->qirqs = qemu_allocate_irqs(ics_set_irq, ics, ics->nr_irqs);
514
515 /* XSCOM region for PSI registers */
516 pnv_xscom_region_init(&psi->xscom_regs, OBJECT(dev), &pnv_psi_xscom_ops,
517 psi, "xscom-psi", PNV_XSCOM_PSIHB_SIZE);
518
519 /* Initialize MMIO region */
520 memory_region_init_io(&psi->regs_mr, OBJECT(dev), &psi_mmio_ops, psi,
521 "psihb", PNV_PSIHB_SIZE);
522
523 /* Default sources in XIVR */
524 for (i = 0; i < PSI_NUM_INTERRUPTS; i++) {
525 uint8_t xivr = irq_to_xivr[i];
526 psi->regs[xivr] = PSIHB_XIVR_PRIO_MSK |
527 ((uint64_t) i << PSIHB_XIVR_SRC_SH);
528 }
529
530 pnv_psi_realize(dev, errp);
531 }
532
533 static int pnv_psi_dt_xscom(PnvXScomInterface *dev, void *fdt, int xscom_offset)
534 {
535 PnvPsiClass *ppc = PNV_PSI_GET_CLASS(dev);
536 char *name;
537 int offset;
538 uint32_t reg[] = {
539 cpu_to_be32(ppc->xscom_pcba),
540 cpu_to_be32(ppc->xscom_size)
541 };
542
543 name = g_strdup_printf("psihb@%x", ppc->xscom_pcba);
544 offset = fdt_add_subnode(fdt, xscom_offset, name);
545 _FDT(offset);
546 g_free(name);
547
548 _FDT(fdt_setprop(fdt, offset, "reg", reg, sizeof(reg)));
549 _FDT(fdt_setprop_cell(fdt, offset, "#address-cells", 2));
550 _FDT(fdt_setprop_cell(fdt, offset, "#size-cells", 1));
551 _FDT(fdt_setprop(fdt, offset, "compatible", ppc->compat,
552 ppc->compat_size));
553 return 0;
554 }
555
556 static Property pnv_psi_properties[] = {
557 DEFINE_PROP_UINT64("bar", PnvPsi, bar, 0),
558 DEFINE_PROP_UINT64("fsp-bar", PnvPsi, fsp_bar, 0),
559 DEFINE_PROP_END_OF_LIST(),
560 };
561
562 static void pnv_psi_power8_class_init(ObjectClass *klass, void *data)
563 {
564 DeviceClass *dc = DEVICE_CLASS(klass);
565 PnvPsiClass *ppc = PNV_PSI_CLASS(klass);
566 static const char compat[] = "ibm,power8-psihb-x\0ibm,psihb-x";
567
568 dc->desc = "PowerNV PSI Controller POWER8";
569 dc->realize = pnv_psi_power8_realize;
570
571 ppc->xscom_pcba = PNV_XSCOM_PSIHB_BASE;
572 ppc->xscom_size = PNV_XSCOM_PSIHB_SIZE;
573 ppc->bar_mask = PSIHB_BAR_MASK;
574 ppc->compat = compat;
575 ppc->compat_size = sizeof(compat);
576 }
577
578 static const TypeInfo pnv_psi_power8_info = {
579 .name = TYPE_PNV8_PSI,
580 .parent = TYPE_PNV_PSI,
581 .instance_size = sizeof(Pnv8Psi),
582 .instance_init = pnv_psi_power8_instance_init,
583 .class_init = pnv_psi_power8_class_init,
584 };
585
586
587 /* Common registers */
588
589 #define PSIHB9_CR 0x20
590 #define PSIHB9_SEMR 0x28
591
592 /* P9 registers */
593
594 #define PSIHB9_INTERRUPT_CONTROL 0x58
595 #define PSIHB9_IRQ_METHOD PPC_BIT(0)
596 #define PSIHB9_IRQ_RESET PPC_BIT(1)
597 #define PSIHB9_ESB_CI_BASE 0x60
598 #define PSIHB9_ESB_CI_ADDR_MASK PPC_BITMASK(8, 47)
599 #define PSIHB9_ESB_CI_VALID PPC_BIT(63)
600 #define PSIHB9_ESB_NOTIF_ADDR 0x68
601 #define PSIHB9_ESB_NOTIF_ADDR_MASK PPC_BITMASK(8, 60)
602 #define PSIHB9_ESB_NOTIF_VALID PPC_BIT(63)
603 #define PSIHB9_IVT_OFFSET 0x70
604 #define PSIHB9_IVT_OFF_SHIFT 32
605
606 #define PSIHB9_IRQ_LEVEL 0x78 /* assertion */
607 #define PSIHB9_IRQ_LEVEL_PSI PPC_BIT(0)
608 #define PSIHB9_IRQ_LEVEL_OCC PPC_BIT(1)
609 #define PSIHB9_IRQ_LEVEL_FSI PPC_BIT(2)
610 #define PSIHB9_IRQ_LEVEL_LPCHC PPC_BIT(3)
611 #define PSIHB9_IRQ_LEVEL_LOCAL_ERR PPC_BIT(4)
612 #define PSIHB9_IRQ_LEVEL_GLOBAL_ERR PPC_BIT(5)
613 #define PSIHB9_IRQ_LEVEL_TPM PPC_BIT(6)
614 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ1 PPC_BIT(7)
615 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ2 PPC_BIT(8)
616 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ3 PPC_BIT(9)
617 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ4 PPC_BIT(10)
618 #define PSIHB9_IRQ_LEVEL_SBE_I2C PPC_BIT(11)
619 #define PSIHB9_IRQ_LEVEL_DIO PPC_BIT(12)
620 #define PSIHB9_IRQ_LEVEL_PSU PPC_BIT(13)
621 #define PSIHB9_IRQ_LEVEL_I2C_C PPC_BIT(14)
622 #define PSIHB9_IRQ_LEVEL_I2C_D PPC_BIT(15)
623 #define PSIHB9_IRQ_LEVEL_I2C_E PPC_BIT(16)
624 #define PSIHB9_IRQ_LEVEL_SBE PPC_BIT(19)
625
626 #define PSIHB9_IRQ_STAT 0x80 /* P bit */
627 #define PSIHB9_IRQ_STAT_PSI PPC_BIT(0)
628 #define PSIHB9_IRQ_STAT_OCC PPC_BIT(1)
629 #define PSIHB9_IRQ_STAT_FSI PPC_BIT(2)
630 #define PSIHB9_IRQ_STAT_LPCHC PPC_BIT(3)
631 #define PSIHB9_IRQ_STAT_LOCAL_ERR PPC_BIT(4)
632 #define PSIHB9_IRQ_STAT_GLOBAL_ERR PPC_BIT(5)
633 #define PSIHB9_IRQ_STAT_TPM PPC_BIT(6)
634 #define PSIHB9_IRQ_STAT_LPC_SIRQ1 PPC_BIT(7)
635 #define PSIHB9_IRQ_STAT_LPC_SIRQ2 PPC_BIT(8)
636 #define PSIHB9_IRQ_STAT_LPC_SIRQ3 PPC_BIT(9)
637 #define PSIHB9_IRQ_STAT_LPC_SIRQ4 PPC_BIT(10)
638 #define PSIHB9_IRQ_STAT_SBE_I2C PPC_BIT(11)
639 #define PSIHB9_IRQ_STAT_DIO PPC_BIT(12)
640 #define PSIHB9_IRQ_STAT_PSU PPC_BIT(13)
641
642 /* P10 register extensions */
643
644 #define PSIHB10_CR PSIHB9_CR
645 #define PSIHB10_CR_STORE_EOI PPC_BIT(12)
646
647 #define PSIHB10_ESB_CI_BASE PSIHB9_ESB_CI_BASE
648 #define PSIHB10_ESB_CI_64K PPC_BIT(1)
649
650 static void pnv_psi_notify(XiveNotifier *xf, uint32_t srcno, bool pq_checked)
651 {
652 PnvPsi *psi = PNV_PSI(xf);
653 uint64_t notif_port = psi->regs[PSIHB_REG(PSIHB9_ESB_NOTIF_ADDR)];
654 bool valid = notif_port & PSIHB9_ESB_NOTIF_VALID;
655 uint64_t notify_addr = notif_port & ~PSIHB9_ESB_NOTIF_VALID;
656
657 uint32_t offset =
658 (psi->regs[PSIHB_REG(PSIHB9_IVT_OFFSET)] >> PSIHB9_IVT_OFF_SHIFT);
659 uint64_t data = offset | srcno;
660 MemTxResult result;
661
662 if (pq_checked) {
663 data |= XIVE_TRIGGER_PQ;
664 }
665
666 if (!valid) {
667 return;
668 }
669
670 address_space_stq_be(&address_space_memory, notify_addr, data,
671 MEMTXATTRS_UNSPECIFIED, &result);
672 if (result != MEMTX_OK) {
673 qemu_log_mask(LOG_GUEST_ERROR, "%s: trigger failed @%"
674 HWADDR_PRIx "\n", __func__, notif_port);
675 return;
676 }
677 }
678
679 static uint64_t pnv_psi_p9_mmio_read(void *opaque, hwaddr addr, unsigned size)
680 {
681 PnvPsi *psi = PNV_PSI(opaque);
682 uint32_t reg = PSIHB_REG(addr);
683 uint64_t val = -1;
684
685 switch (addr) {
686 case PSIHB9_CR:
687 case PSIHB9_SEMR:
688 /* FSP stuff */
689 case PSIHB9_INTERRUPT_CONTROL:
690 case PSIHB9_ESB_CI_BASE:
691 case PSIHB9_ESB_NOTIF_ADDR:
692 case PSIHB9_IVT_OFFSET:
693 val = psi->regs[reg];
694 break;
695 default:
696 qemu_log_mask(LOG_GUEST_ERROR, "PSI: read at 0x%" PRIx64 "\n", addr);
697 }
698
699 return val;
700 }
701
702 static void pnv_psi_p9_mmio_write(void *opaque, hwaddr addr,
703 uint64_t val, unsigned size)
704 {
705 PnvPsi *psi = PNV_PSI(opaque);
706 Pnv9Psi *psi9 = PNV9_PSI(psi);
707 uint32_t reg = PSIHB_REG(addr);
708 MemoryRegion *sysmem = get_system_memory();
709
710 switch (addr) {
711 case PSIHB9_CR:
712 if (val & PSIHB10_CR_STORE_EOI) {
713 psi9->source.esb_flags |= XIVE_SRC_STORE_EOI;
714 } else {
715 psi9->source.esb_flags &= ~XIVE_SRC_STORE_EOI;
716 }
717 break;
718
719 case PSIHB9_SEMR:
720 /* FSP stuff */
721 break;
722 case PSIHB9_INTERRUPT_CONTROL:
723 if (val & PSIHB9_IRQ_RESET) {
724 device_cold_reset(DEVICE(&psi9->source));
725 }
726 psi->regs[reg] = val;
727 break;
728
729 case PSIHB9_ESB_CI_BASE:
730 if (val & PSIHB10_ESB_CI_64K) {
731 psi9->source.esb_shift = XIVE_ESB_64K;
732 } else {
733 psi9->source.esb_shift = XIVE_ESB_4K;
734 }
735 if (!(val & PSIHB9_ESB_CI_VALID)) {
736 if (psi->regs[reg] & PSIHB9_ESB_CI_VALID) {
737 memory_region_del_subregion(sysmem, &psi9->source.esb_mmio);
738 }
739 } else {
740 if (!(psi->regs[reg] & PSIHB9_ESB_CI_VALID)) {
741 hwaddr addr = val & ~(PSIHB9_ESB_CI_VALID | PSIHB10_ESB_CI_64K);
742 memory_region_add_subregion(sysmem, addr,
743 &psi9->source.esb_mmio);
744 }
745 }
746 psi->regs[reg] = val;
747 break;
748
749 case PSIHB9_ESB_NOTIF_ADDR:
750 psi->regs[reg] = val;
751 break;
752 case PSIHB9_IVT_OFFSET:
753 psi->regs[reg] = val;
754 break;
755 default:
756 qemu_log_mask(LOG_GUEST_ERROR, "PSI: write at 0x%" PRIx64 "\n", addr);
757 }
758 }
759
760 static const MemoryRegionOps pnv_psi_p9_mmio_ops = {
761 .read = pnv_psi_p9_mmio_read,
762 .write = pnv_psi_p9_mmio_write,
763 .endianness = DEVICE_BIG_ENDIAN,
764 .valid = {
765 .min_access_size = 8,
766 .max_access_size = 8,
767 },
768 .impl = {
769 .min_access_size = 8,
770 .max_access_size = 8,
771 },
772 };
773
774 static uint64_t pnv_psi_p9_xscom_read(void *opaque, hwaddr addr, unsigned size)
775 {
776 uint32_t reg = addr >> 3;
777 uint64_t val = -1;
778
779 if (reg < PSIHB_XSCOM_BAR) {
780 /* FIR, not modeled */
781 qemu_log_mask(LOG_UNIMP, "PSI: xscom read at 0x%08x\n", reg);
782 } else {
783 val = pnv_psi_p9_mmio_read(opaque, PSIHB_MMIO(reg), size);
784 }
785 return val;
786 }
787
788 static void pnv_psi_p9_xscom_write(void *opaque, hwaddr addr,
789 uint64_t val, unsigned size)
790 {
791 PnvPsi *psi = PNV_PSI(opaque);
792 uint32_t reg = addr >> 3;
793
794 if (reg < PSIHB_XSCOM_BAR) {
795 /* FIR, not modeled */
796 qemu_log_mask(LOG_UNIMP, "PSI: xscom write at 0x%08x\n", reg);
797 } else if (reg == PSIHB_XSCOM_BAR) {
798 pnv_psi_set_bar(psi, val);
799 } else {
800 pnv_psi_p9_mmio_write(opaque, PSIHB_MMIO(reg), val, size);
801 }
802 }
803
804 static const MemoryRegionOps pnv_psi_p9_xscom_ops = {
805 .read = pnv_psi_p9_xscom_read,
806 .write = pnv_psi_p9_xscom_write,
807 .endianness = DEVICE_BIG_ENDIAN,
808 .valid = {
809 .min_access_size = 8,
810 .max_access_size = 8,
811 },
812 .impl = {
813 .min_access_size = 8,
814 .max_access_size = 8,
815 }
816 };
817
818 static void pnv_psi_power9_set_irq(void *opaque, int irq, int state)
819 {
820 PnvPsi *psi = opaque;
821 uint64_t irq_method = psi->regs[PSIHB_REG(PSIHB9_INTERRUPT_CONTROL)];
822
823 if (irq_method & PSIHB9_IRQ_METHOD) {
824 qemu_log_mask(LOG_GUEST_ERROR, "PSI: LSI IRQ method no supported\n");
825 return;
826 }
827
828 /* Update LSI levels */
829 if (state) {
830 psi->regs[PSIHB_REG(PSIHB9_IRQ_LEVEL)] |= PPC_BIT(irq);
831 } else {
832 psi->regs[PSIHB_REG(PSIHB9_IRQ_LEVEL)] &= ~PPC_BIT(irq);
833 }
834
835 qemu_set_irq(psi->qirqs[irq], state);
836 }
837
838 static void pnv_psi_power9_reset(DeviceState *dev)
839 {
840 Pnv9Psi *psi = PNV9_PSI(dev);
841
842 pnv_psi_reset(dev);
843
844 if (memory_region_is_mapped(&psi->source.esb_mmio)) {
845 memory_region_del_subregion(get_system_memory(), &psi->source.esb_mmio);
846 }
847 }
848
849 static void pnv_psi_power9_instance_init(Object *obj)
850 {
851 Pnv9Psi *psi = PNV9_PSI(obj);
852
853 object_initialize_child(obj, "source", &psi->source, TYPE_XIVE_SOURCE);
854 object_property_add_alias(obj, "shift", OBJECT(&psi->source), "shift");
855 }
856
857 static void pnv_psi_power9_realize(DeviceState *dev, Error **errp)
858 {
859 PnvPsi *psi = PNV_PSI(dev);
860 XiveSource *xsrc = &PNV9_PSI(psi)->source;
861 int i;
862
863 object_property_set_int(OBJECT(xsrc), "nr-irqs", PSIHB9_NUM_IRQS,
864 &error_fatal);
865 object_property_set_link(OBJECT(xsrc), "xive", OBJECT(psi), &error_abort);
866 object_property_set_int(OBJECT(xsrc), "reset-pq", XIVE_ESB_RESET,
867 &error_abort);
868 if (!qdev_realize(DEVICE(xsrc), NULL, errp)) {
869 return;
870 }
871
872 for (i = 0; i < xsrc->nr_irqs; i++) {
873 xive_source_irq_set_lsi(xsrc, i);
874 }
875
876 psi->qirqs = qemu_allocate_irqs(xive_source_set_irq, xsrc, xsrc->nr_irqs);
877
878 qdev_init_gpio_in(dev, pnv_psi_power9_set_irq, xsrc->nr_irqs);
879
880 /* XSCOM region for PSI registers */
881 pnv_xscom_region_init(&psi->xscom_regs, OBJECT(dev), &pnv_psi_p9_xscom_ops,
882 psi, "xscom-psi", PNV9_XSCOM_PSIHB_SIZE);
883
884 /* MMIO region for PSI registers */
885 memory_region_init_io(&psi->regs_mr, OBJECT(dev), &pnv_psi_p9_mmio_ops, psi,
886 "psihb", PNV9_PSIHB_SIZE);
887
888 pnv_psi_realize(dev, errp);
889 }
890
891 static void pnv_psi_power9_class_init(ObjectClass *klass, void *data)
892 {
893 DeviceClass *dc = DEVICE_CLASS(klass);
894 PnvPsiClass *ppc = PNV_PSI_CLASS(klass);
895 XiveNotifierClass *xfc = XIVE_NOTIFIER_CLASS(klass);
896 static const char compat[] = "ibm,power9-psihb-x\0ibm,psihb-x";
897
898 dc->desc = "PowerNV PSI Controller POWER9";
899 dc->realize = pnv_psi_power9_realize;
900 dc->reset = pnv_psi_power9_reset;
901
902 ppc->xscom_pcba = PNV9_XSCOM_PSIHB_BASE;
903 ppc->xscom_size = PNV9_XSCOM_PSIHB_SIZE;
904 ppc->bar_mask = PSIHB9_BAR_MASK;
905 ppc->compat = compat;
906 ppc->compat_size = sizeof(compat);
907
908 xfc->notify = pnv_psi_notify;
909 }
910
911 static const TypeInfo pnv_psi_power9_info = {
912 .name = TYPE_PNV9_PSI,
913 .parent = TYPE_PNV_PSI,
914 .instance_size = sizeof(Pnv9Psi),
915 .instance_init = pnv_psi_power9_instance_init,
916 .class_init = pnv_psi_power9_class_init,
917 .interfaces = (InterfaceInfo[]) {
918 { TYPE_XIVE_NOTIFIER },
919 { },
920 },
921 };
922
923 static void pnv_psi_power10_class_init(ObjectClass *klass, void *data)
924 {
925 DeviceClass *dc = DEVICE_CLASS(klass);
926 PnvPsiClass *ppc = PNV_PSI_CLASS(klass);
927 static const char compat[] = "ibm,power10-psihb-x\0ibm,psihb-x";
928
929 dc->desc = "PowerNV PSI Controller POWER10";
930
931 ppc->xscom_pcba = PNV10_XSCOM_PSIHB_BASE;
932 ppc->xscom_size = PNV10_XSCOM_PSIHB_SIZE;
933 ppc->compat = compat;
934 ppc->compat_size = sizeof(compat);
935 }
936
937 static const TypeInfo pnv_psi_power10_info = {
938 .name = TYPE_PNV10_PSI,
939 .parent = TYPE_PNV9_PSI,
940 .class_init = pnv_psi_power10_class_init,
941 };
942
943 static void pnv_psi_class_init(ObjectClass *klass, void *data)
944 {
945 DeviceClass *dc = DEVICE_CLASS(klass);
946 PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
947
948 xdc->dt_xscom = pnv_psi_dt_xscom;
949
950 dc->desc = "PowerNV PSI Controller";
951 device_class_set_props(dc, pnv_psi_properties);
952 dc->reset = pnv_psi_reset;
953 dc->user_creatable = false;
954 }
955
956 static const TypeInfo pnv_psi_info = {
957 .name = TYPE_PNV_PSI,
958 .parent = TYPE_DEVICE,
959 .instance_size = sizeof(PnvPsi),
960 .class_init = pnv_psi_class_init,
961 .class_size = sizeof(PnvPsiClass),
962 .abstract = true,
963 .interfaces = (InterfaceInfo[]) {
964 { TYPE_PNV_XSCOM_INTERFACE },
965 { }
966 }
967 };
968
969 static void pnv_psi_register_types(void)
970 {
971 type_register_static(&pnv_psi_info);
972 type_register_static(&pnv_psi_power8_info);
973 type_register_static(&pnv_psi_power9_info);
974 type_register_static(&pnv_psi_power10_info);
975 }
976
977 type_init(pnv_psi_register_types);
978
979 void pnv_psi_pic_print_info(Pnv9Psi *psi9, Monitor *mon)
980 {
981 PnvPsi *psi = PNV_PSI(psi9);
982
983 uint32_t offset =
984 (psi->regs[PSIHB_REG(PSIHB9_IVT_OFFSET)] >> PSIHB9_IVT_OFF_SHIFT);
985
986 monitor_printf(mon, "PSIHB Source %08x .. %08x\n",
987 offset, offset + psi9->source.nr_irqs - 1);
988 xive_source_pic_print_info(&psi9->source, offset, mon);
989 }
armbru's QEMU hackery