root / hw / pci / shpc.c @ ddf5636d
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#include "qemu-common.h" |
---|---|
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#include <strings.h> |
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#include <stdint.h> |
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#include "qemu/range.h" |
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#include "qemu/error-report.h" |
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#include "hw/pci/shpc.h" |
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#include "hw/pci/pci.h" |
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#include "hw/pci/pci_bus.h" |
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#include "hw/pci/msi.h" |
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#include "qapi/qmp/qerror.h" |
11 |
|
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/* TODO: model power only and disabled slot states. */
|
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/* TODO: handle SERR and wakeups */
|
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/* TODO: consider enabling 66MHz support */
|
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|
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/* TODO: remove fully only on state DISABLED and LED off.
|
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* track state to properly record this. */
|
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|
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/* SHPC Working Register Set */
|
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#define SHPC_BASE_OFFSET 0x00 /* 4 bytes */ |
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#define SHPC_SLOTS_33 0x04 /* 4 bytes. Also encodes PCI-X slots. */ |
22 |
#define SHPC_SLOTS_66 0x08 /* 4 bytes. */ |
23 |
#define SHPC_NSLOTS 0x0C /* 1 byte */ |
24 |
#define SHPC_FIRST_DEV 0x0D /* 1 byte */ |
25 |
#define SHPC_PHYS_SLOT 0x0E /* 2 byte */ |
26 |
#define SHPC_PHYS_NUM_MAX 0x7ff |
27 |
#define SHPC_PHYS_NUM_UP 0x2000 |
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#define SHPC_PHYS_MRL 0x4000 |
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#define SHPC_PHYS_BUTTON 0x8000 |
30 |
#define SHPC_SEC_BUS 0x10 /* 2 bytes */ |
31 |
#define SHPC_SEC_BUS_33 0x0 |
32 |
#define SHPC_SEC_BUS_66 0x1 /* Unused */ |
33 |
#define SHPC_SEC_BUS_MASK 0x7 |
34 |
#define SHPC_MSI_CTL 0x12 /* 1 byte */ |
35 |
#define SHPC_PROG_IFC 0x13 /* 1 byte */ |
36 |
#define SHPC_PROG_IFC_1_0 0x1 |
37 |
#define SHPC_CMD_CODE 0x14 /* 1 byte */ |
38 |
#define SHPC_CMD_TRGT 0x15 /* 1 byte */ |
39 |
#define SHPC_CMD_TRGT_MIN 0x1 |
40 |
#define SHPC_CMD_TRGT_MAX 0x1f |
41 |
#define SHPC_CMD_STATUS 0x16 /* 2 bytes */ |
42 |
#define SHPC_CMD_STATUS_BUSY 0x1 |
43 |
#define SHPC_CMD_STATUS_MRL_OPEN 0x2 |
44 |
#define SHPC_CMD_STATUS_INVALID_CMD 0x4 |
45 |
#define SHPC_CMD_STATUS_INVALID_MODE 0x8 |
46 |
#define SHPC_INT_LOCATOR 0x18 /* 4 bytes */ |
47 |
#define SHPC_INT_COMMAND 0x1 |
48 |
#define SHPC_SERR_LOCATOR 0x1C /* 4 bytes */ |
49 |
#define SHPC_SERR_INT 0x20 /* 4 bytes */ |
50 |
#define SHPC_INT_DIS 0x1 |
51 |
#define SHPC_SERR_DIS 0x2 |
52 |
#define SHPC_CMD_INT_DIS 0x4 |
53 |
#define SHPC_ARB_SERR_DIS 0x8 |
54 |
#define SHPC_CMD_DETECTED 0x10000 |
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#define SHPC_ARB_DETECTED 0x20000 |
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/* 4 bytes * slot # (start from 0) */
|
57 |
#define SHPC_SLOT_REG(s) (0x24 + (s) * 4) |
58 |
/* 2 bytes */
|
59 |
#define SHPC_SLOT_STATUS(s) (0x0 + SHPC_SLOT_REG(s)) |
60 |
|
61 |
/* Same slot state masks are used for command and status registers */
|
62 |
#define SHPC_SLOT_STATE_MASK 0x03 |
63 |
#define SHPC_SLOT_STATE_SHIFT \
|
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(ffs(SHPC_SLOT_STATE_MASK) - 1)
|
65 |
|
66 |
#define SHPC_STATE_NO 0x0 |
67 |
#define SHPC_STATE_PWRONLY 0x1 |
68 |
#define SHPC_STATE_ENABLED 0x2 |
69 |
#define SHPC_STATE_DISABLED 0x3 |
70 |
|
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#define SHPC_SLOT_PWR_LED_MASK 0xC |
72 |
#define SHPC_SLOT_PWR_LED_SHIFT \
|
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(ffs(SHPC_SLOT_PWR_LED_MASK) - 1)
|
74 |
#define SHPC_SLOT_ATTN_LED_MASK 0x30 |
75 |
#define SHPC_SLOT_ATTN_LED_SHIFT \
|
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(ffs(SHPC_SLOT_ATTN_LED_MASK) - 1)
|
77 |
|
78 |
#define SHPC_LED_NO 0x0 |
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#define SHPC_LED_ON 0x1 |
80 |
#define SHPC_LED_BLINK 0x2 |
81 |
#define SHPC_LED_OFF 0x3 |
82 |
|
83 |
#define SHPC_SLOT_STATUS_PWR_FAULT 0x40 |
84 |
#define SHPC_SLOT_STATUS_BUTTON 0x80 |
85 |
#define SHPC_SLOT_STATUS_MRL_OPEN 0x100 |
86 |
#define SHPC_SLOT_STATUS_66 0x200 |
87 |
#define SHPC_SLOT_STATUS_PRSNT_MASK 0xC00 |
88 |
#define SHPC_SLOT_STATUS_PRSNT_EMPTY 0x3 |
89 |
#define SHPC_SLOT_STATUS_PRSNT_25W 0x1 |
90 |
#define SHPC_SLOT_STATUS_PRSNT_15W 0x2 |
91 |
#define SHPC_SLOT_STATUS_PRSNT_7_5W 0x0 |
92 |
|
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#define SHPC_SLOT_STATUS_PRSNT_PCIX 0x3000 |
94 |
|
95 |
|
96 |
/* 1 byte */
|
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#define SHPC_SLOT_EVENT_LATCH(s) (0x2 + SHPC_SLOT_REG(s)) |
98 |
/* 1 byte */
|
99 |
#define SHPC_SLOT_EVENT_SERR_INT_DIS(d, s) (0x3 + SHPC_SLOT_REG(s)) |
100 |
#define SHPC_SLOT_EVENT_PRESENCE 0x01 |
101 |
#define SHPC_SLOT_EVENT_ISOLATED_FAULT 0x02 |
102 |
#define SHPC_SLOT_EVENT_BUTTON 0x04 |
103 |
#define SHPC_SLOT_EVENT_MRL 0x08 |
104 |
#define SHPC_SLOT_EVENT_CONNECTED_FAULT 0x10 |
105 |
/* Bits below are used for Serr/Int disable only */
|
106 |
#define SHPC_SLOT_EVENT_MRL_SERR_DIS 0x20 |
107 |
#define SHPC_SLOT_EVENT_CONNECTED_FAULT_SERR_DIS 0x40 |
108 |
|
109 |
#define SHPC_MIN_SLOTS 1 |
110 |
#define SHPC_MAX_SLOTS 31 |
111 |
#define SHPC_SIZEOF(d) SHPC_SLOT_REG((d)->shpc->nslots)
|
112 |
|
113 |
/* SHPC Slot identifiers */
|
114 |
|
115 |
/* Hotplug supported at 31 slots out of the total 32. We reserve slot 0,
|
116 |
and give the rest of them physical *and* pci numbers starting from 1, so
|
117 |
they match logical numbers. Note: this means that multiple slots must have
|
118 |
different chassis number values, to make chassis+physical slot unique.
|
119 |
TODO: make this configurable? */
|
120 |
#define SHPC_IDX_TO_LOGICAL(slot) ((slot) + 1) |
121 |
#define SHPC_LOGICAL_TO_IDX(target) ((target) - 1) |
122 |
#define SHPC_IDX_TO_PCI(slot) ((slot) + 1) |
123 |
#define SHPC_PCI_TO_IDX(pci_slot) ((pci_slot) - 1) |
124 |
#define SHPC_IDX_TO_PHYSICAL(slot) ((slot) + 1) |
125 |
|
126 |
static int roundup_pow_of_two(int x) |
127 |
{ |
128 |
x |= (x >> 1);
|
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x |= (x >> 2);
|
130 |
x |= (x >> 4);
|
131 |
x |= (x >> 8);
|
132 |
x |= (x >> 16);
|
133 |
return x + 1; |
134 |
} |
135 |
|
136 |
static uint16_t shpc_get_status(SHPCDevice *shpc, int slot, uint16_t msk) |
137 |
{ |
138 |
uint8_t *status = shpc->config + SHPC_SLOT_STATUS(slot); |
139 |
return (pci_get_word(status) & msk) >> (ffs(msk) - 1); |
140 |
} |
141 |
|
142 |
static void shpc_set_status(SHPCDevice *shpc, |
143 |
int slot, uint8_t value, uint16_t msk)
|
144 |
{ |
145 |
uint8_t *status = shpc->config + SHPC_SLOT_STATUS(slot); |
146 |
pci_word_test_and_clear_mask(status, msk); |
147 |
pci_word_test_and_set_mask(status, value << (ffs(msk) - 1));
|
148 |
} |
149 |
|
150 |
static void shpc_interrupt_update(PCIDevice *d) |
151 |
{ |
152 |
SHPCDevice *shpc = d->shpc; |
153 |
int slot;
|
154 |
int level = 0; |
155 |
uint32_t serr_int; |
156 |
uint32_t int_locator = 0;
|
157 |
|
158 |
/* Update interrupt locator register */
|
159 |
for (slot = 0; slot < shpc->nslots; ++slot) { |
160 |
uint8_t event = shpc->config[SHPC_SLOT_EVENT_LATCH(slot)]; |
161 |
uint8_t disable = shpc->config[SHPC_SLOT_EVENT_SERR_INT_DIS(d, slot)]; |
162 |
uint32_t mask = 1 << SHPC_IDX_TO_LOGICAL(slot);
|
163 |
if (event & ~disable) {
|
164 |
int_locator |= mask; |
165 |
} |
166 |
} |
167 |
serr_int = pci_get_long(shpc->config + SHPC_SERR_INT); |
168 |
if ((serr_int & SHPC_CMD_DETECTED) && !(serr_int & SHPC_CMD_INT_DIS)) {
|
169 |
int_locator |= SHPC_INT_COMMAND; |
170 |
} |
171 |
pci_set_long(shpc->config + SHPC_INT_LOCATOR, int_locator); |
172 |
level = (!(serr_int & SHPC_INT_DIS) && int_locator) ? 1 : 0; |
173 |
if (msi_enabled(d) && shpc->msi_requested != level)
|
174 |
msi_notify(d, 0);
|
175 |
else
|
176 |
pci_set_irq(d, level); |
177 |
shpc->msi_requested = level; |
178 |
} |
179 |
|
180 |
static void shpc_set_sec_bus_speed(SHPCDevice *shpc, uint8_t speed) |
181 |
{ |
182 |
switch (speed) {
|
183 |
case SHPC_SEC_BUS_33:
|
184 |
shpc->config[SHPC_SEC_BUS] &= ~SHPC_SEC_BUS_MASK; |
185 |
shpc->config[SHPC_SEC_BUS] |= speed; |
186 |
break;
|
187 |
default:
|
188 |
pci_word_test_and_set_mask(shpc->config + SHPC_CMD_STATUS, |
189 |
SHPC_CMD_STATUS_INVALID_MODE); |
190 |
} |
191 |
} |
192 |
|
193 |
void shpc_reset(PCIDevice *d)
|
194 |
{ |
195 |
SHPCDevice *shpc = d->shpc; |
196 |
int nslots = shpc->nslots;
|
197 |
int i;
|
198 |
memset(shpc->config, 0, SHPC_SIZEOF(d));
|
199 |
pci_set_byte(shpc->config + SHPC_NSLOTS, nslots); |
200 |
pci_set_long(shpc->config + SHPC_SLOTS_33, nslots); |
201 |
pci_set_long(shpc->config + SHPC_SLOTS_66, 0);
|
202 |
pci_set_byte(shpc->config + SHPC_FIRST_DEV, SHPC_IDX_TO_PCI(0));
|
203 |
pci_set_word(shpc->config + SHPC_PHYS_SLOT, |
204 |
SHPC_IDX_TO_PHYSICAL(0) |
|
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SHPC_PHYS_NUM_UP | |
206 |
SHPC_PHYS_MRL | |
207 |
SHPC_PHYS_BUTTON); |
208 |
pci_set_long(shpc->config + SHPC_SERR_INT, SHPC_INT_DIS | |
209 |
SHPC_SERR_DIS | |
210 |
SHPC_CMD_INT_DIS | |
211 |
SHPC_ARB_SERR_DIS); |
212 |
pci_set_byte(shpc->config + SHPC_PROG_IFC, SHPC_PROG_IFC_1_0); |
213 |
pci_set_word(shpc->config + SHPC_SEC_BUS, SHPC_SEC_BUS_33); |
214 |
for (i = 0; i < shpc->nslots; ++i) { |
215 |
pci_set_byte(shpc->config + SHPC_SLOT_EVENT_SERR_INT_DIS(d, i), |
216 |
SHPC_SLOT_EVENT_PRESENCE | |
217 |
SHPC_SLOT_EVENT_ISOLATED_FAULT | |
218 |
SHPC_SLOT_EVENT_BUTTON | |
219 |
SHPC_SLOT_EVENT_MRL | |
220 |
SHPC_SLOT_EVENT_CONNECTED_FAULT | |
221 |
SHPC_SLOT_EVENT_MRL_SERR_DIS | |
222 |
SHPC_SLOT_EVENT_CONNECTED_FAULT_SERR_DIS); |
223 |
if (shpc->sec_bus->devices[PCI_DEVFN(SHPC_IDX_TO_PCI(i), 0)]) { |
224 |
shpc_set_status(shpc, i, SHPC_STATE_ENABLED, SHPC_SLOT_STATE_MASK); |
225 |
shpc_set_status(shpc, i, 0, SHPC_SLOT_STATUS_MRL_OPEN);
|
226 |
shpc_set_status(shpc, i, SHPC_SLOT_STATUS_PRSNT_7_5W, |
227 |
SHPC_SLOT_STATUS_PRSNT_MASK); |
228 |
shpc_set_status(shpc, i, SHPC_LED_ON, SHPC_SLOT_PWR_LED_MASK); |
229 |
} else {
|
230 |
shpc_set_status(shpc, i, SHPC_STATE_DISABLED, SHPC_SLOT_STATE_MASK); |
231 |
shpc_set_status(shpc, i, 1, SHPC_SLOT_STATUS_MRL_OPEN);
|
232 |
shpc_set_status(shpc, i, SHPC_SLOT_STATUS_PRSNT_EMPTY, |
233 |
SHPC_SLOT_STATUS_PRSNT_MASK); |
234 |
shpc_set_status(shpc, i, SHPC_LED_OFF, SHPC_SLOT_PWR_LED_MASK); |
235 |
} |
236 |
shpc_set_status(shpc, i, 0, SHPC_SLOT_STATUS_66);
|
237 |
} |
238 |
shpc_set_sec_bus_speed(shpc, SHPC_SEC_BUS_33); |
239 |
shpc->msi_requested = 0;
|
240 |
shpc_interrupt_update(d); |
241 |
} |
242 |
|
243 |
static void shpc_invalid_command(SHPCDevice *shpc) |
244 |
{ |
245 |
pci_word_test_and_set_mask(shpc->config + SHPC_CMD_STATUS, |
246 |
SHPC_CMD_STATUS_INVALID_CMD); |
247 |
} |
248 |
|
249 |
static void shpc_free_devices_in_slot(SHPCDevice *shpc, int slot) |
250 |
{ |
251 |
int devfn;
|
252 |
int pci_slot = SHPC_IDX_TO_PCI(slot);
|
253 |
for (devfn = PCI_DEVFN(pci_slot, 0); |
254 |
devfn <= PCI_DEVFN(pci_slot, PCI_FUNC_MAX - 1);
|
255 |
++devfn) { |
256 |
PCIDevice *affected_dev = shpc->sec_bus->devices[devfn]; |
257 |
if (affected_dev) {
|
258 |
object_unparent(OBJECT(affected_dev)); |
259 |
} |
260 |
} |
261 |
} |
262 |
|
263 |
static void shpc_slot_command(SHPCDevice *shpc, uint8_t target, |
264 |
uint8_t state, uint8_t power, uint8_t attn) |
265 |
{ |
266 |
uint8_t current_state; |
267 |
int slot = SHPC_LOGICAL_TO_IDX(target);
|
268 |
if (target < SHPC_CMD_TRGT_MIN || slot >= shpc->nslots) {
|
269 |
shpc_invalid_command(shpc); |
270 |
return;
|
271 |
} |
272 |
current_state = shpc_get_status(shpc, slot, SHPC_SLOT_STATE_MASK); |
273 |
if (current_state == SHPC_STATE_ENABLED && state == SHPC_STATE_PWRONLY) {
|
274 |
shpc_invalid_command(shpc); |
275 |
return;
|
276 |
} |
277 |
|
278 |
switch (power) {
|
279 |
case SHPC_LED_NO:
|
280 |
break;
|
281 |
default:
|
282 |
/* TODO: send event to monitor */
|
283 |
shpc_set_status(shpc, slot, power, SHPC_SLOT_PWR_LED_MASK); |
284 |
} |
285 |
switch (attn) {
|
286 |
case SHPC_LED_NO:
|
287 |
break;
|
288 |
default:
|
289 |
/* TODO: send event to monitor */
|
290 |
shpc_set_status(shpc, slot, attn, SHPC_SLOT_ATTN_LED_MASK); |
291 |
} |
292 |
|
293 |
if ((current_state == SHPC_STATE_DISABLED && state == SHPC_STATE_PWRONLY) ||
|
294 |
(current_state == SHPC_STATE_DISABLED && state == SHPC_STATE_ENABLED)) { |
295 |
shpc_set_status(shpc, slot, state, SHPC_SLOT_STATE_MASK); |
296 |
} else if ((current_state == SHPC_STATE_ENABLED || |
297 |
current_state == SHPC_STATE_PWRONLY) && |
298 |
state == SHPC_STATE_DISABLED) { |
299 |
shpc_set_status(shpc, slot, state, SHPC_SLOT_STATE_MASK); |
300 |
power = shpc_get_status(shpc, slot, SHPC_SLOT_PWR_LED_MASK); |
301 |
/* TODO: track what monitor requested. */
|
302 |
/* Look at LED to figure out whether it's ok to remove the device. */
|
303 |
if (power == SHPC_LED_OFF) {
|
304 |
shpc_free_devices_in_slot(shpc, slot); |
305 |
shpc_set_status(shpc, slot, 1, SHPC_SLOT_STATUS_MRL_OPEN);
|
306 |
shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_EMPTY, |
307 |
SHPC_SLOT_STATUS_PRSNT_MASK); |
308 |
shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= |
309 |
SHPC_SLOT_EVENT_BUTTON | |
310 |
SHPC_SLOT_EVENT_MRL | |
311 |
SHPC_SLOT_EVENT_PRESENCE; |
312 |
} |
313 |
} |
314 |
} |
315 |
|
316 |
static void shpc_command(SHPCDevice *shpc) |
317 |
{ |
318 |
uint8_t code = pci_get_byte(shpc->config + SHPC_CMD_CODE); |
319 |
uint8_t speed; |
320 |
uint8_t target; |
321 |
uint8_t attn; |
322 |
uint8_t power; |
323 |
uint8_t state; |
324 |
int i;
|
325 |
|
326 |
/* Clear status from the previous command. */
|
327 |
pci_word_test_and_clear_mask(shpc->config + SHPC_CMD_STATUS, |
328 |
SHPC_CMD_STATUS_BUSY | |
329 |
SHPC_CMD_STATUS_MRL_OPEN | |
330 |
SHPC_CMD_STATUS_INVALID_CMD | |
331 |
SHPC_CMD_STATUS_INVALID_MODE); |
332 |
switch (code) {
|
333 |
case 0x00 ... 0x3f: |
334 |
target = shpc->config[SHPC_CMD_TRGT] & SHPC_CMD_TRGT_MAX; |
335 |
state = (code & SHPC_SLOT_STATE_MASK) >> SHPC_SLOT_STATE_SHIFT; |
336 |
power = (code & SHPC_SLOT_PWR_LED_MASK) >> SHPC_SLOT_PWR_LED_SHIFT; |
337 |
attn = (code & SHPC_SLOT_ATTN_LED_MASK) >> SHPC_SLOT_ATTN_LED_SHIFT; |
338 |
shpc_slot_command(shpc, target, state, power, attn); |
339 |
break;
|
340 |
case 0x40 ... 0x47: |
341 |
speed = code & SHPC_SEC_BUS_MASK; |
342 |
shpc_set_sec_bus_speed(shpc, speed); |
343 |
break;
|
344 |
case 0x48: |
345 |
/* Power only all slots */
|
346 |
/* first verify no slots are enabled */
|
347 |
for (i = 0; i < shpc->nslots; ++i) { |
348 |
state = shpc_get_status(shpc, i, SHPC_SLOT_STATE_MASK); |
349 |
if (state == SHPC_STATE_ENABLED) {
|
350 |
shpc_invalid_command(shpc); |
351 |
goto done;
|
352 |
} |
353 |
} |
354 |
for (i = 0; i < shpc->nslots; ++i) { |
355 |
if (!(shpc_get_status(shpc, i, SHPC_SLOT_STATUS_MRL_OPEN))) {
|
356 |
shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN, |
357 |
SHPC_STATE_PWRONLY, SHPC_LED_ON, SHPC_LED_NO); |
358 |
} else {
|
359 |
shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN, |
360 |
SHPC_STATE_NO, SHPC_LED_OFF, SHPC_LED_NO); |
361 |
} |
362 |
} |
363 |
break;
|
364 |
case 0x49: |
365 |
/* Enable all slots */
|
366 |
/* TODO: Spec says this shall fail if some are already enabled.
|
367 |
* This doesn't make sense - why not? a spec bug? */
|
368 |
for (i = 0; i < shpc->nslots; ++i) { |
369 |
state = shpc_get_status(shpc, i, SHPC_SLOT_STATE_MASK); |
370 |
if (state == SHPC_STATE_ENABLED) {
|
371 |
shpc_invalid_command(shpc); |
372 |
goto done;
|
373 |
} |
374 |
} |
375 |
for (i = 0; i < shpc->nslots; ++i) { |
376 |
if (!(shpc_get_status(shpc, i, SHPC_SLOT_STATUS_MRL_OPEN))) {
|
377 |
shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN, |
378 |
SHPC_STATE_ENABLED, SHPC_LED_ON, SHPC_LED_NO); |
379 |
} else {
|
380 |
shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN, |
381 |
SHPC_STATE_NO, SHPC_LED_OFF, SHPC_LED_NO); |
382 |
} |
383 |
} |
384 |
break;
|
385 |
default:
|
386 |
shpc_invalid_command(shpc); |
387 |
break;
|
388 |
} |
389 |
done:
|
390 |
pci_long_test_and_set_mask(shpc->config + SHPC_SERR_INT, SHPC_CMD_DETECTED); |
391 |
} |
392 |
|
393 |
static void shpc_write(PCIDevice *d, unsigned addr, uint64_t val, int l) |
394 |
{ |
395 |
SHPCDevice *shpc = d->shpc; |
396 |
int i;
|
397 |
if (addr >= SHPC_SIZEOF(d)) {
|
398 |
return;
|
399 |
} |
400 |
l = MIN(l, SHPC_SIZEOF(d) - addr); |
401 |
|
402 |
/* TODO: code duplicated from pci.c */
|
403 |
for (i = 0; i < l; val >>= 8, ++i) { |
404 |
unsigned a = addr + i;
|
405 |
uint8_t wmask = shpc->wmask[a]; |
406 |
uint8_t w1cmask = shpc->w1cmask[a]; |
407 |
assert(!(wmask & w1cmask)); |
408 |
shpc->config[a] = (shpc->config[a] & ~wmask) | (val & wmask); |
409 |
shpc->config[a] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */
|
410 |
} |
411 |
if (ranges_overlap(addr, l, SHPC_CMD_CODE, 2)) { |
412 |
shpc_command(shpc); |
413 |
} |
414 |
shpc_interrupt_update(d); |
415 |
} |
416 |
|
417 |
static uint64_t shpc_read(PCIDevice *d, unsigned addr, int l) |
418 |
{ |
419 |
uint64_t val = 0x0;
|
420 |
if (addr >= SHPC_SIZEOF(d)) {
|
421 |
return val;
|
422 |
} |
423 |
l = MIN(l, SHPC_SIZEOF(d) - addr); |
424 |
memcpy(&val, d->shpc->config + addr, l); |
425 |
return val;
|
426 |
} |
427 |
|
428 |
/* SHPC Bridge Capability */
|
429 |
#define SHPC_CAP_LENGTH 0x08 |
430 |
#define SHPC_CAP_DWORD_SELECT 0x2 /* 1 byte */ |
431 |
#define SHPC_CAP_CxP 0x3 /* 1 byte: CSP, CIP */ |
432 |
#define SHPC_CAP_DWORD_DATA 0x4 /* 4 bytes */ |
433 |
#define SHPC_CAP_CSP_MASK 0x4 |
434 |
#define SHPC_CAP_CIP_MASK 0x8 |
435 |
|
436 |
static uint8_t shpc_cap_dword(PCIDevice *d)
|
437 |
{ |
438 |
return pci_get_byte(d->config + d->shpc->cap + SHPC_CAP_DWORD_SELECT);
|
439 |
} |
440 |
|
441 |
/* Update dword data capability register */
|
442 |
static void shpc_cap_update_dword(PCIDevice *d) |
443 |
{ |
444 |
unsigned data;
|
445 |
data = shpc_read(d, shpc_cap_dword(d) * 4, 4); |
446 |
pci_set_long(d->config + d->shpc->cap + SHPC_CAP_DWORD_DATA, data); |
447 |
} |
448 |
|
449 |
/* Add SHPC capability to the config space for the device. */
|
450 |
static int shpc_cap_add_config(PCIDevice *d) |
451 |
{ |
452 |
uint8_t *config; |
453 |
int config_offset;
|
454 |
config_offset = pci_add_capability(d, PCI_CAP_ID_SHPC, |
455 |
0, SHPC_CAP_LENGTH);
|
456 |
if (config_offset < 0) { |
457 |
return config_offset;
|
458 |
} |
459 |
config = d->config + config_offset; |
460 |
|
461 |
pci_set_byte(config + SHPC_CAP_DWORD_SELECT, 0);
|
462 |
pci_set_byte(config + SHPC_CAP_CxP, 0);
|
463 |
pci_set_long(config + SHPC_CAP_DWORD_DATA, 0);
|
464 |
d->shpc->cap = config_offset; |
465 |
/* Make dword select and data writeable. */
|
466 |
pci_set_byte(d->wmask + config_offset + SHPC_CAP_DWORD_SELECT, 0xff);
|
467 |
pci_set_long(d->wmask + config_offset + SHPC_CAP_DWORD_DATA, 0xffffffff);
|
468 |
return 0; |
469 |
} |
470 |
|
471 |
static uint64_t shpc_mmio_read(void *opaque, hwaddr addr, |
472 |
unsigned size)
|
473 |
{ |
474 |
return shpc_read(opaque, addr, size);
|
475 |
} |
476 |
|
477 |
static void shpc_mmio_write(void *opaque, hwaddr addr, |
478 |
uint64_t val, unsigned size)
|
479 |
{ |
480 |
shpc_write(opaque, addr, val, size); |
481 |
} |
482 |
|
483 |
static const MemoryRegionOps shpc_mmio_ops = { |
484 |
.read = shpc_mmio_read, |
485 |
.write = shpc_mmio_write, |
486 |
.endianness = DEVICE_LITTLE_ENDIAN, |
487 |
.valid = { |
488 |
/* SHPC ECN requires dword accesses, but the original 1.0 spec doesn't.
|
489 |
* It's easier to suppport all sizes than worry about it. */
|
490 |
.min_access_size = 1,
|
491 |
.max_access_size = 4,
|
492 |
}, |
493 |
}; |
494 |
static void shpc_device_hotplug_common(PCIDevice *affected_dev, int *slot, |
495 |
SHPCDevice *shpc, Error **errp) |
496 |
{ |
497 |
int pci_slot = PCI_SLOT(affected_dev->devfn);
|
498 |
*slot = SHPC_PCI_TO_IDX(pci_slot); |
499 |
|
500 |
if (pci_slot < SHPC_IDX_TO_PCI(0) || *slot >= shpc->nslots) { |
501 |
error_setg(errp, "Unsupported PCI slot %d for standard hotplug "
|
502 |
"controller. Valid slots are between %d and %d.",
|
503 |
pci_slot, SHPC_IDX_TO_PCI(0),
|
504 |
SHPC_IDX_TO_PCI(shpc->nslots) - 1);
|
505 |
return;
|
506 |
} |
507 |
} |
508 |
|
509 |
void shpc_device_hotplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
|
510 |
Error **errp) |
511 |
{ |
512 |
Error *local_err = NULL;
|
513 |
PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev); |
514 |
SHPCDevice *shpc = pci_hotplug_dev->shpc; |
515 |
int slot;
|
516 |
|
517 |
shpc_device_hotplug_common(PCI_DEVICE(dev), &slot, shpc, &local_err); |
518 |
if (local_err) {
|
519 |
error_propagate(errp, local_err); |
520 |
return;
|
521 |
} |
522 |
|
523 |
/* Don't send event when device is enabled during qemu machine creation:
|
524 |
* it is present on boot, no hotplug event is necessary. We do send an
|
525 |
* event when the device is disabled later. */
|
526 |
if (!dev->hotplugged) {
|
527 |
shpc_set_status(shpc, slot, 0, SHPC_SLOT_STATUS_MRL_OPEN);
|
528 |
shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_7_5W, |
529 |
SHPC_SLOT_STATUS_PRSNT_MASK); |
530 |
return;
|
531 |
} |
532 |
|
533 |
/* This could be a cancellation of the previous removal.
|
534 |
* We check MRL state to figure out. */
|
535 |
if (shpc_get_status(shpc, slot, SHPC_SLOT_STATUS_MRL_OPEN)) {
|
536 |
shpc_set_status(shpc, slot, 0, SHPC_SLOT_STATUS_MRL_OPEN);
|
537 |
shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_7_5W, |
538 |
SHPC_SLOT_STATUS_PRSNT_MASK); |
539 |
shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= |
540 |
SHPC_SLOT_EVENT_BUTTON | |
541 |
SHPC_SLOT_EVENT_MRL | |
542 |
SHPC_SLOT_EVENT_PRESENCE; |
543 |
} else {
|
544 |
/* Press attention button to cancel removal */
|
545 |
shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= |
546 |
SHPC_SLOT_EVENT_BUTTON; |
547 |
} |
548 |
shpc_set_status(shpc, slot, 0, SHPC_SLOT_STATUS_66);
|
549 |
shpc_interrupt_update(pci_hotplug_dev); |
550 |
} |
551 |
|
552 |
void shpc_device_hot_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
|
553 |
Error **errp) |
554 |
{ |
555 |
Error *local_err = NULL;
|
556 |
PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev); |
557 |
SHPCDevice *shpc = pci_hotplug_dev->shpc; |
558 |
uint8_t state; |
559 |
uint8_t led; |
560 |
int slot;
|
561 |
|
562 |
shpc_device_hotplug_common(PCI_DEVICE(dev), &slot, shpc, errp); |
563 |
if (local_err) {
|
564 |
return;
|
565 |
} |
566 |
|
567 |
shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= SHPC_SLOT_EVENT_BUTTON; |
568 |
state = shpc_get_status(shpc, slot, SHPC_SLOT_STATE_MASK); |
569 |
led = shpc_get_status(shpc, slot, SHPC_SLOT_PWR_LED_MASK); |
570 |
if (state == SHPC_STATE_DISABLED && led == SHPC_LED_OFF) {
|
571 |
shpc_free_devices_in_slot(shpc, slot); |
572 |
shpc_set_status(shpc, slot, 1, SHPC_SLOT_STATUS_MRL_OPEN);
|
573 |
shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_EMPTY, |
574 |
SHPC_SLOT_STATUS_PRSNT_MASK); |
575 |
shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= |
576 |
SHPC_SLOT_EVENT_MRL | |
577 |
SHPC_SLOT_EVENT_PRESENCE; |
578 |
} |
579 |
shpc_set_status(shpc, slot, 0, SHPC_SLOT_STATUS_66);
|
580 |
shpc_interrupt_update(pci_hotplug_dev); |
581 |
} |
582 |
|
583 |
/* Initialize the SHPC structure in bridge's BAR. */
|
584 |
int shpc_init(PCIDevice *d, PCIBus *sec_bus, MemoryRegion *bar, unsigned offset) |
585 |
{ |
586 |
int i, ret;
|
587 |
int nslots = SHPC_MAX_SLOTS; /* TODO: qdev property? */ |
588 |
SHPCDevice *shpc = d->shpc = g_malloc0(sizeof(*d->shpc));
|
589 |
shpc->sec_bus = sec_bus; |
590 |
ret = shpc_cap_add_config(d); |
591 |
if (ret) {
|
592 |
g_free(d->shpc); |
593 |
return ret;
|
594 |
} |
595 |
if (nslots < SHPC_MIN_SLOTS) {
|
596 |
return 0; |
597 |
} |
598 |
if (nslots > SHPC_MAX_SLOTS ||
|
599 |
SHPC_IDX_TO_PCI(nslots) > PCI_SLOT_MAX) { |
600 |
/* TODO: report an error mesage that makes sense. */
|
601 |
return -EINVAL;
|
602 |
} |
603 |
shpc->nslots = nslots; |
604 |
shpc->config = g_malloc0(SHPC_SIZEOF(d)); |
605 |
shpc->cmask = g_malloc0(SHPC_SIZEOF(d)); |
606 |
shpc->wmask = g_malloc0(SHPC_SIZEOF(d)); |
607 |
shpc->w1cmask = g_malloc0(SHPC_SIZEOF(d)); |
608 |
|
609 |
shpc_reset(d); |
610 |
|
611 |
pci_set_long(shpc->config + SHPC_BASE_OFFSET, offset); |
612 |
|
613 |
pci_set_byte(shpc->wmask + SHPC_CMD_CODE, 0xff);
|
614 |
pci_set_byte(shpc->wmask + SHPC_CMD_TRGT, SHPC_CMD_TRGT_MAX); |
615 |
pci_set_byte(shpc->wmask + SHPC_CMD_TRGT, SHPC_CMD_TRGT_MAX); |
616 |
pci_set_long(shpc->wmask + SHPC_SERR_INT, |
617 |
SHPC_INT_DIS | |
618 |
SHPC_SERR_DIS | |
619 |
SHPC_CMD_INT_DIS | |
620 |
SHPC_ARB_SERR_DIS); |
621 |
pci_set_long(shpc->w1cmask + SHPC_SERR_INT, |
622 |
SHPC_CMD_DETECTED | |
623 |
SHPC_ARB_DETECTED); |
624 |
for (i = 0; i < nslots; ++i) { |
625 |
pci_set_byte(shpc->wmask + |
626 |
SHPC_SLOT_EVENT_SERR_INT_DIS(d, i), |
627 |
SHPC_SLOT_EVENT_PRESENCE | |
628 |
SHPC_SLOT_EVENT_ISOLATED_FAULT | |
629 |
SHPC_SLOT_EVENT_BUTTON | |
630 |
SHPC_SLOT_EVENT_MRL | |
631 |
SHPC_SLOT_EVENT_CONNECTED_FAULT | |
632 |
SHPC_SLOT_EVENT_MRL_SERR_DIS | |
633 |
SHPC_SLOT_EVENT_CONNECTED_FAULT_SERR_DIS); |
634 |
pci_set_byte(shpc->w1cmask + |
635 |
SHPC_SLOT_EVENT_LATCH(i), |
636 |
SHPC_SLOT_EVENT_PRESENCE | |
637 |
SHPC_SLOT_EVENT_ISOLATED_FAULT | |
638 |
SHPC_SLOT_EVENT_BUTTON | |
639 |
SHPC_SLOT_EVENT_MRL | |
640 |
SHPC_SLOT_EVENT_CONNECTED_FAULT); |
641 |
} |
642 |
|
643 |
/* TODO: init cmask */
|
644 |
memory_region_init_io(&shpc->mmio, OBJECT(d), &shpc_mmio_ops, |
645 |
d, "shpc-mmio", SHPC_SIZEOF(d));
|
646 |
shpc_cap_update_dword(d); |
647 |
memory_region_add_subregion(bar, offset, &shpc->mmio); |
648 |
|
649 |
qbus_set_hotplug_handler(BUS(sec_bus), DEVICE(d), NULL);
|
650 |
|
651 |
d->cap_present |= QEMU_PCI_CAP_SHPC; |
652 |
return 0; |
653 |
} |
654 |
|
655 |
int shpc_bar_size(PCIDevice *d)
|
656 |
{ |
657 |
return roundup_pow_of_two(SHPC_SLOT_REG(SHPC_MAX_SLOTS));
|
658 |
} |
659 |
|
660 |
void shpc_cleanup(PCIDevice *d, MemoryRegion *bar)
|
661 |
{ |
662 |
SHPCDevice *shpc = d->shpc; |
663 |
d->cap_present &= ~QEMU_PCI_CAP_SHPC; |
664 |
memory_region_del_subregion(bar, &shpc->mmio); |
665 |
/* TODO: cleanup config space changes? */
|
666 |
g_free(shpc->config); |
667 |
g_free(shpc->cmask); |
668 |
g_free(shpc->wmask); |
669 |
g_free(shpc->w1cmask); |
670 |
memory_region_destroy(&shpc->mmio); |
671 |
g_free(shpc); |
672 |
} |
673 |
|
674 |
void shpc_cap_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l) |
675 |
{ |
676 |
if (!ranges_overlap(addr, l, d->shpc->cap, SHPC_CAP_LENGTH)) {
|
677 |
return;
|
678 |
} |
679 |
if (ranges_overlap(addr, l, d->shpc->cap + SHPC_CAP_DWORD_DATA, 4)) { |
680 |
unsigned dword_data;
|
681 |
dword_data = pci_get_long(d->shpc->config + d->shpc->cap |
682 |
+ SHPC_CAP_DWORD_DATA); |
683 |
shpc_write(d, shpc_cap_dword(d) * 4, dword_data, 4); |
684 |
} |
685 |
/* Update cap dword data in case guest is going to read it. */
|
686 |
shpc_cap_update_dword(d); |
687 |
} |
688 |
|
689 |
static void shpc_save(QEMUFile *f, void *pv, size_t size) |
690 |
{ |
691 |
PCIDevice *d = container_of(pv, PCIDevice, shpc); |
692 |
qemu_put_buffer(f, d->shpc->config, SHPC_SIZEOF(d)); |
693 |
} |
694 |
|
695 |
static int shpc_load(QEMUFile *f, void *pv, size_t size) |
696 |
{ |
697 |
PCIDevice *d = container_of(pv, PCIDevice, shpc); |
698 |
int ret = qemu_get_buffer(f, d->shpc->config, SHPC_SIZEOF(d));
|
699 |
if (ret != SHPC_SIZEOF(d)) {
|
700 |
return -EINVAL;
|
701 |
} |
702 |
/* Make sure we don't lose notifications. An extra interrupt is harmless. */
|
703 |
d->shpc->msi_requested = 0;
|
704 |
shpc_interrupt_update(d); |
705 |
return 0; |
706 |
} |
707 |
|
708 |
VMStateInfo shpc_vmstate_info = { |
709 |
.name = "shpc",
|
710 |
.get = shpc_load, |
711 |
.put = shpc_save, |
712 |
}; |