root / hw / shpc.c @ a8170e5e
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#include <strings.h> |
---|---|
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#include <stdint.h> |
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#include "range.h" |
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#include "range.h" |
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#include "shpc.h" |
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#include "pci.h" |
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#include "pci_internals.h" |
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#include "msi.h" |
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|
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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. */ |
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#define SHPC_SLOTS_66 0x08 /* 4 bytes. */ |
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#define SHPC_NSLOTS 0x0C /* 1 byte */ |
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#define SHPC_FIRST_DEV 0x0D /* 1 byte */ |
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#define SHPC_PHYS_SLOT 0x0E /* 2 byte */ |
24 |
#define SHPC_PHYS_NUM_MAX 0x7ff |
25 |
#define SHPC_PHYS_NUM_UP 0x2000 |
26 |
#define SHPC_PHYS_MRL 0x4000 |
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#define SHPC_PHYS_BUTTON 0x8000 |
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#define SHPC_SEC_BUS 0x10 /* 2 bytes */ |
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#define SHPC_SEC_BUS_33 0x0 |
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#define SHPC_SEC_BUS_66 0x1 /* Unused */ |
31 |
#define SHPC_SEC_BUS_MASK 0x7 |
32 |
#define SHPC_MSI_CTL 0x12 /* 1 byte */ |
33 |
#define SHPC_PROG_IFC 0x13 /* 1 byte */ |
34 |
#define SHPC_PROG_IFC_1_0 0x1 |
35 |
#define SHPC_CMD_CODE 0x14 /* 1 byte */ |
36 |
#define SHPC_CMD_TRGT 0x15 /* 1 byte */ |
37 |
#define SHPC_CMD_TRGT_MIN 0x1 |
38 |
#define SHPC_CMD_TRGT_MAX 0x1f |
39 |
#define SHPC_CMD_STATUS 0x16 /* 2 bytes */ |
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#define SHPC_CMD_STATUS_BUSY 0x1 |
41 |
#define SHPC_CMD_STATUS_MRL_OPEN 0x2 |
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#define SHPC_CMD_STATUS_INVALID_CMD 0x4 |
43 |
#define SHPC_CMD_STATUS_INVALID_MODE 0x8 |
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#define SHPC_INT_LOCATOR 0x18 /* 4 bytes */ |
45 |
#define SHPC_INT_COMMAND 0x1 |
46 |
#define SHPC_SERR_LOCATOR 0x1C /* 4 bytes */ |
47 |
#define SHPC_SERR_INT 0x20 /* 4 bytes */ |
48 |
#define SHPC_INT_DIS 0x1 |
49 |
#define SHPC_SERR_DIS 0x2 |
50 |
#define SHPC_CMD_INT_DIS 0x4 |
51 |
#define SHPC_ARB_SERR_DIS 0x8 |
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#define SHPC_CMD_DETECTED 0x10000 |
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#define SHPC_ARB_DETECTED 0x20000 |
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/* 4 bytes * slot # (start from 0) */
|
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#define SHPC_SLOT_REG(s) (0x24 + (s) * 4) |
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/* 2 bytes */
|
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#define SHPC_SLOT_STATUS(s) (0x0 + SHPC_SLOT_REG(s)) |
58 |
|
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/* Same slot state masks are used for command and status registers */
|
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#define SHPC_SLOT_STATE_MASK 0x03 |
61 |
#define SHPC_SLOT_STATE_SHIFT \
|
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(ffs(SHPC_SLOT_STATE_MASK) - 1)
|
63 |
|
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#define SHPC_STATE_NO 0x0 |
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#define SHPC_STATE_PWRONLY 0x1 |
66 |
#define SHPC_STATE_ENABLED 0x2 |
67 |
#define SHPC_STATE_DISABLED 0x3 |
68 |
|
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#define SHPC_SLOT_PWR_LED_MASK 0xC |
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#define SHPC_SLOT_PWR_LED_SHIFT \
|
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(ffs(SHPC_SLOT_PWR_LED_MASK) - 1)
|
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#define SHPC_SLOT_ATTN_LED_MASK 0x30 |
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#define SHPC_SLOT_ATTN_LED_SHIFT \
|
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(ffs(SHPC_SLOT_ATTN_LED_MASK) - 1)
|
75 |
|
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#define SHPC_LED_NO 0x0 |
77 |
#define SHPC_LED_ON 0x1 |
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#define SHPC_LED_BLINK 0x2 |
79 |
#define SHPC_LED_OFF 0x3 |
80 |
|
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#define SHPC_SLOT_STATUS_PWR_FAULT 0x40 |
82 |
#define SHPC_SLOT_STATUS_BUTTON 0x80 |
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#define SHPC_SLOT_STATUS_MRL_OPEN 0x100 |
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#define SHPC_SLOT_STATUS_66 0x200 |
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#define SHPC_SLOT_STATUS_PRSNT_MASK 0xC00 |
86 |
#define SHPC_SLOT_STATUS_PRSNT_EMPTY 0x3 |
87 |
#define SHPC_SLOT_STATUS_PRSNT_25W 0x1 |
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#define SHPC_SLOT_STATUS_PRSNT_15W 0x2 |
89 |
#define SHPC_SLOT_STATUS_PRSNT_7_5W 0x0 |
90 |
|
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#define SHPC_SLOT_STATUS_PRSNT_PCIX 0x3000 |
92 |
|
93 |
|
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/* 1 byte */
|
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#define SHPC_SLOT_EVENT_LATCH(s) (0x2 + SHPC_SLOT_REG(s)) |
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/* 1 byte */
|
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#define SHPC_SLOT_EVENT_SERR_INT_DIS(d, s) (0x3 + SHPC_SLOT_REG(s)) |
98 |
#define SHPC_SLOT_EVENT_PRESENCE 0x01 |
99 |
#define SHPC_SLOT_EVENT_ISOLATED_FAULT 0x02 |
100 |
#define SHPC_SLOT_EVENT_BUTTON 0x04 |
101 |
#define SHPC_SLOT_EVENT_MRL 0x08 |
102 |
#define SHPC_SLOT_EVENT_CONNECTED_FAULT 0x10 |
103 |
/* Bits below are used for Serr/Int disable only */
|
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#define SHPC_SLOT_EVENT_MRL_SERR_DIS 0x20 |
105 |
#define SHPC_SLOT_EVENT_CONNECTED_FAULT_SERR_DIS 0x40 |
106 |
|
107 |
#define SHPC_MIN_SLOTS 1 |
108 |
#define SHPC_MAX_SLOTS 31 |
109 |
#define SHPC_SIZEOF(d) SHPC_SLOT_REG((d)->shpc->nslots)
|
110 |
|
111 |
/* SHPC Slot identifiers */
|
112 |
|
113 |
/* Hotplug supported at 31 slots out of the total 32. We reserve slot 0,
|
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and give the rest of them physical *and* pci numbers starting from 1, so
|
115 |
they match logical numbers. Note: this means that multiple slots must have
|
116 |
different chassis number values, to make chassis+physical slot unique.
|
117 |
TODO: make this configurable? */
|
118 |
#define SHPC_IDX_TO_LOGICAL(slot) ((slot) + 1) |
119 |
#define SHPC_LOGICAL_TO_IDX(target) ((target) - 1) |
120 |
#define SHPC_IDX_TO_PCI(slot) ((slot) + 1) |
121 |
#define SHPC_PCI_TO_IDX(pci_slot) ((pci_slot) - 1) |
122 |
#define SHPC_IDX_TO_PHYSICAL(slot) ((slot) + 1) |
123 |
|
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static int roundup_pow_of_two(int x) |
125 |
{ |
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x |= (x >> 1);
|
127 |
x |= (x >> 2);
|
128 |
x |= (x >> 4);
|
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x |= (x >> 8);
|
130 |
x |= (x >> 16);
|
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return x + 1; |
132 |
} |
133 |
|
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static uint16_t shpc_get_status(SHPCDevice *shpc, int slot, uint16_t msk) |
135 |
{ |
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uint8_t *status = shpc->config + SHPC_SLOT_STATUS(slot); |
137 |
return (pci_get_word(status) & msk) >> (ffs(msk) - 1); |
138 |
} |
139 |
|
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static void shpc_set_status(SHPCDevice *shpc, |
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int slot, uint8_t value, uint16_t msk)
|
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{ |
143 |
uint8_t *status = shpc->config + SHPC_SLOT_STATUS(slot); |
144 |
pci_word_test_and_clear_mask(status, msk); |
145 |
pci_word_test_and_set_mask(status, value << (ffs(msk) - 1));
|
146 |
} |
147 |
|
148 |
static void shpc_interrupt_update(PCIDevice *d) |
149 |
{ |
150 |
SHPCDevice *shpc = d->shpc; |
151 |
int slot;
|
152 |
int level = 0; |
153 |
uint32_t serr_int; |
154 |
uint32_t int_locator = 0;
|
155 |
|
156 |
/* Update interrupt locator register */
|
157 |
for (slot = 0; slot < shpc->nslots; ++slot) { |
158 |
uint8_t event = shpc->config[SHPC_SLOT_EVENT_LATCH(slot)]; |
159 |
uint8_t disable = shpc->config[SHPC_SLOT_EVENT_SERR_INT_DIS(d, slot)]; |
160 |
uint32_t mask = 1 << SHPC_IDX_TO_LOGICAL(slot);
|
161 |
if (event & ~disable) {
|
162 |
int_locator |= mask; |
163 |
} |
164 |
} |
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serr_int = pci_get_long(shpc->config + SHPC_SERR_INT); |
166 |
if ((serr_int & SHPC_CMD_DETECTED) && !(serr_int & SHPC_CMD_INT_DIS)) {
|
167 |
int_locator |= SHPC_INT_COMMAND; |
168 |
} |
169 |
pci_set_long(shpc->config + SHPC_INT_LOCATOR, int_locator); |
170 |
level = (!(serr_int & SHPC_INT_DIS) && int_locator) ? 1 : 0; |
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if (msi_enabled(d) && shpc->msi_requested != level)
|
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msi_notify(d, 0);
|
173 |
else
|
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qemu_set_irq(d->irq[0], level);
|
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shpc->msi_requested = level; |
176 |
} |
177 |
|
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static void shpc_set_sec_bus_speed(SHPCDevice *shpc, uint8_t speed) |
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{ |
180 |
switch (speed) {
|
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case SHPC_SEC_BUS_33:
|
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shpc->config[SHPC_SEC_BUS] &= ~SHPC_SEC_BUS_MASK; |
183 |
shpc->config[SHPC_SEC_BUS] |= speed; |
184 |
break;
|
185 |
default:
|
186 |
pci_word_test_and_set_mask(shpc->config + SHPC_CMD_STATUS, |
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SHPC_CMD_STATUS_INVALID_MODE); |
188 |
} |
189 |
} |
190 |
|
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void shpc_reset(PCIDevice *d)
|
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{ |
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SHPCDevice *shpc = d->shpc; |
194 |
int nslots = shpc->nslots;
|
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int i;
|
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memset(shpc->config, 0, SHPC_SIZEOF(d));
|
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pci_set_byte(shpc->config + SHPC_NSLOTS, nslots); |
198 |
pci_set_long(shpc->config + SHPC_SLOTS_33, nslots); |
199 |
pci_set_long(shpc->config + SHPC_SLOTS_66, 0);
|
200 |
pci_set_byte(shpc->config + SHPC_FIRST_DEV, SHPC_IDX_TO_PCI(0));
|
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pci_set_word(shpc->config + SHPC_PHYS_SLOT, |
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SHPC_IDX_TO_PHYSICAL(0) |
|
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SHPC_PHYS_NUM_UP | |
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SHPC_PHYS_MRL | |
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SHPC_PHYS_BUTTON); |
206 |
pci_set_long(shpc->config + SHPC_SERR_INT, SHPC_INT_DIS | |
207 |
SHPC_SERR_DIS | |
208 |
SHPC_CMD_INT_DIS | |
209 |
SHPC_ARB_SERR_DIS); |
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pci_set_byte(shpc->config + SHPC_PROG_IFC, SHPC_PROG_IFC_1_0); |
211 |
pci_set_word(shpc->config + SHPC_SEC_BUS, SHPC_SEC_BUS_33); |
212 |
for (i = 0; i < shpc->nslots; ++i) { |
213 |
pci_set_byte(shpc->config + SHPC_SLOT_EVENT_SERR_INT_DIS(d, i), |
214 |
SHPC_SLOT_EVENT_PRESENCE | |
215 |
SHPC_SLOT_EVENT_ISOLATED_FAULT | |
216 |
SHPC_SLOT_EVENT_BUTTON | |
217 |
SHPC_SLOT_EVENT_MRL | |
218 |
SHPC_SLOT_EVENT_CONNECTED_FAULT | |
219 |
SHPC_SLOT_EVENT_MRL_SERR_DIS | |
220 |
SHPC_SLOT_EVENT_CONNECTED_FAULT_SERR_DIS); |
221 |
if (shpc->sec_bus->devices[PCI_DEVFN(SHPC_IDX_TO_PCI(i), 0)]) { |
222 |
shpc_set_status(shpc, i, SHPC_STATE_ENABLED, SHPC_SLOT_STATE_MASK); |
223 |
shpc_set_status(shpc, i, 0, SHPC_SLOT_STATUS_MRL_OPEN);
|
224 |
shpc_set_status(shpc, i, SHPC_SLOT_STATUS_PRSNT_7_5W, |
225 |
SHPC_SLOT_STATUS_PRSNT_MASK); |
226 |
shpc_set_status(shpc, i, SHPC_LED_ON, SHPC_SLOT_PWR_LED_MASK); |
227 |
} else {
|
228 |
shpc_set_status(shpc, i, SHPC_STATE_DISABLED, SHPC_SLOT_STATE_MASK); |
229 |
shpc_set_status(shpc, i, 1, SHPC_SLOT_STATUS_MRL_OPEN);
|
230 |
shpc_set_status(shpc, i, SHPC_SLOT_STATUS_PRSNT_EMPTY, |
231 |
SHPC_SLOT_STATUS_PRSNT_MASK); |
232 |
shpc_set_status(shpc, i, SHPC_LED_OFF, SHPC_SLOT_PWR_LED_MASK); |
233 |
} |
234 |
shpc_set_status(shpc, i, 0, SHPC_SLOT_STATUS_66);
|
235 |
} |
236 |
shpc_set_sec_bus_speed(shpc, SHPC_SEC_BUS_33); |
237 |
shpc->msi_requested = 0;
|
238 |
shpc_interrupt_update(d); |
239 |
} |
240 |
|
241 |
static void shpc_invalid_command(SHPCDevice *shpc) |
242 |
{ |
243 |
pci_word_test_and_set_mask(shpc->config + SHPC_CMD_STATUS, |
244 |
SHPC_CMD_STATUS_INVALID_CMD); |
245 |
} |
246 |
|
247 |
static void shpc_free_devices_in_slot(SHPCDevice *shpc, int slot) |
248 |
{ |
249 |
int devfn;
|
250 |
int pci_slot = SHPC_IDX_TO_PCI(slot);
|
251 |
for (devfn = PCI_DEVFN(pci_slot, 0); |
252 |
devfn <= PCI_DEVFN(pci_slot, PCI_FUNC_MAX - 1);
|
253 |
++devfn) { |
254 |
PCIDevice *affected_dev = shpc->sec_bus->devices[devfn]; |
255 |
if (affected_dev) {
|
256 |
qdev_free(&affected_dev->qdev); |
257 |
} |
258 |
} |
259 |
} |
260 |
|
261 |
static void shpc_slot_command(SHPCDevice *shpc, uint8_t target, |
262 |
uint8_t state, uint8_t power, uint8_t attn) |
263 |
{ |
264 |
uint8_t current_state; |
265 |
int slot = SHPC_LOGICAL_TO_IDX(target);
|
266 |
if (target < SHPC_CMD_TRGT_MIN || slot >= shpc->nslots) {
|
267 |
shpc_invalid_command(shpc); |
268 |
return;
|
269 |
} |
270 |
current_state = shpc_get_status(shpc, slot, SHPC_SLOT_STATE_MASK); |
271 |
if (current_state == SHPC_STATE_ENABLED && state == SHPC_STATE_PWRONLY) {
|
272 |
shpc_invalid_command(shpc); |
273 |
return;
|
274 |
} |
275 |
|
276 |
switch (power) {
|
277 |
case SHPC_LED_NO:
|
278 |
break;
|
279 |
default:
|
280 |
/* TODO: send event to monitor */
|
281 |
shpc_set_status(shpc, slot, power, SHPC_SLOT_PWR_LED_MASK); |
282 |
} |
283 |
switch (attn) {
|
284 |
case SHPC_LED_NO:
|
285 |
break;
|
286 |
default:
|
287 |
/* TODO: send event to monitor */
|
288 |
shpc_set_status(shpc, slot, attn, SHPC_SLOT_ATTN_LED_MASK); |
289 |
} |
290 |
|
291 |
if ((current_state == SHPC_STATE_DISABLED && state == SHPC_STATE_PWRONLY) ||
|
292 |
(current_state == SHPC_STATE_DISABLED && state == SHPC_STATE_ENABLED)) { |
293 |
shpc_set_status(shpc, slot, state, SHPC_SLOT_STATE_MASK); |
294 |
} else if ((current_state == SHPC_STATE_ENABLED || |
295 |
current_state == SHPC_STATE_PWRONLY) && |
296 |
state == SHPC_STATE_DISABLED) { |
297 |
shpc_set_status(shpc, slot, state, SHPC_SLOT_STATE_MASK); |
298 |
power = shpc_get_status(shpc, slot, SHPC_SLOT_PWR_LED_MASK); |
299 |
/* TODO: track what monitor requested. */
|
300 |
/* Look at LED to figure out whether it's ok to remove the device. */
|
301 |
if (power == SHPC_LED_OFF) {
|
302 |
shpc_free_devices_in_slot(shpc, slot); |
303 |
shpc_set_status(shpc, slot, 1, SHPC_SLOT_STATUS_MRL_OPEN);
|
304 |
shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_EMPTY, |
305 |
SHPC_SLOT_STATUS_PRSNT_MASK); |
306 |
shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= |
307 |
SHPC_SLOT_EVENT_BUTTON | |
308 |
SHPC_SLOT_EVENT_MRL | |
309 |
SHPC_SLOT_EVENT_PRESENCE; |
310 |
} |
311 |
} |
312 |
} |
313 |
|
314 |
static void shpc_command(SHPCDevice *shpc) |
315 |
{ |
316 |
uint8_t code = pci_get_byte(shpc->config + SHPC_CMD_CODE); |
317 |
uint8_t speed; |
318 |
uint8_t target; |
319 |
uint8_t attn; |
320 |
uint8_t power; |
321 |
uint8_t state; |
322 |
int i;
|
323 |
|
324 |
/* Clear status from the previous command. */
|
325 |
pci_word_test_and_clear_mask(shpc->config + SHPC_CMD_STATUS, |
326 |
SHPC_CMD_STATUS_BUSY | |
327 |
SHPC_CMD_STATUS_MRL_OPEN | |
328 |
SHPC_CMD_STATUS_INVALID_CMD | |
329 |
SHPC_CMD_STATUS_INVALID_MODE); |
330 |
switch (code) {
|
331 |
case 0x00 ... 0x3f: |
332 |
target = shpc->config[SHPC_CMD_TRGT] & SHPC_CMD_TRGT_MAX; |
333 |
state = (code & SHPC_SLOT_STATE_MASK) >> SHPC_SLOT_STATE_SHIFT; |
334 |
power = (code & SHPC_SLOT_PWR_LED_MASK) >> SHPC_SLOT_PWR_LED_SHIFT; |
335 |
attn = (code & SHPC_SLOT_ATTN_LED_MASK) >> SHPC_SLOT_ATTN_LED_SHIFT; |
336 |
shpc_slot_command(shpc, target, state, power, attn); |
337 |
break;
|
338 |
case 0x40 ... 0x47: |
339 |
speed = code & SHPC_SEC_BUS_MASK; |
340 |
shpc_set_sec_bus_speed(shpc, speed); |
341 |
break;
|
342 |
case 0x48: |
343 |
/* Power only all slots */
|
344 |
/* first verify no slots are enabled */
|
345 |
for (i = 0; i < shpc->nslots; ++i) { |
346 |
state = shpc_get_status(shpc, i, SHPC_SLOT_STATE_MASK); |
347 |
if (state == SHPC_STATE_ENABLED) {
|
348 |
shpc_invalid_command(shpc); |
349 |
goto done;
|
350 |
} |
351 |
} |
352 |
for (i = 0; i < shpc->nslots; ++i) { |
353 |
if (!(shpc_get_status(shpc, i, SHPC_SLOT_STATUS_MRL_OPEN))) {
|
354 |
shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN, |
355 |
SHPC_STATE_PWRONLY, SHPC_LED_ON, SHPC_LED_NO); |
356 |
} else {
|
357 |
shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN, |
358 |
SHPC_STATE_NO, SHPC_LED_OFF, SHPC_LED_NO); |
359 |
} |
360 |
} |
361 |
break;
|
362 |
case 0x49: |
363 |
/* Enable all slots */
|
364 |
/* TODO: Spec says this shall fail if some are already enabled.
|
365 |
* This doesn't make sense - why not? a spec bug? */
|
366 |
for (i = 0; i < shpc->nslots; ++i) { |
367 |
state = shpc_get_status(shpc, i, SHPC_SLOT_STATE_MASK); |
368 |
if (state == SHPC_STATE_ENABLED) {
|
369 |
shpc_invalid_command(shpc); |
370 |
goto done;
|
371 |
} |
372 |
} |
373 |
for (i = 0; i < shpc->nslots; ++i) { |
374 |
if (!(shpc_get_status(shpc, i, SHPC_SLOT_STATUS_MRL_OPEN))) {
|
375 |
shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN, |
376 |
SHPC_STATE_ENABLED, SHPC_LED_ON, SHPC_LED_NO); |
377 |
} else {
|
378 |
shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN, |
379 |
SHPC_STATE_NO, SHPC_LED_OFF, SHPC_LED_NO); |
380 |
} |
381 |
} |
382 |
break;
|
383 |
default:
|
384 |
shpc_invalid_command(shpc); |
385 |
break;
|
386 |
} |
387 |
done:
|
388 |
pci_long_test_and_set_mask(shpc->config + SHPC_SERR_INT, SHPC_CMD_DETECTED); |
389 |
} |
390 |
|
391 |
static void shpc_write(PCIDevice *d, unsigned addr, uint64_t val, int l) |
392 |
{ |
393 |
SHPCDevice *shpc = d->shpc; |
394 |
int i;
|
395 |
if (addr >= SHPC_SIZEOF(d)) {
|
396 |
return;
|
397 |
} |
398 |
l = MIN(l, SHPC_SIZEOF(d) - addr); |
399 |
|
400 |
/* TODO: code duplicated from pci.c */
|
401 |
for (i = 0; i < l; val >>= 8, ++i) { |
402 |
unsigned a = addr + i;
|
403 |
uint8_t wmask = shpc->wmask[a]; |
404 |
uint8_t w1cmask = shpc->w1cmask[a]; |
405 |
assert(!(wmask & w1cmask)); |
406 |
shpc->config[a] = (shpc->config[a] & ~wmask) | (val & wmask); |
407 |
shpc->config[a] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */
|
408 |
} |
409 |
if (ranges_overlap(addr, l, SHPC_CMD_CODE, 2)) { |
410 |
shpc_command(shpc); |
411 |
} |
412 |
shpc_interrupt_update(d); |
413 |
} |
414 |
|
415 |
static uint64_t shpc_read(PCIDevice *d, unsigned addr, int l) |
416 |
{ |
417 |
uint64_t val = 0x0;
|
418 |
if (addr >= SHPC_SIZEOF(d)) {
|
419 |
return val;
|
420 |
} |
421 |
l = MIN(l, SHPC_SIZEOF(d) - addr); |
422 |
memcpy(&val, d->shpc->config + addr, l); |
423 |
return val;
|
424 |
} |
425 |
|
426 |
/* SHPC Bridge Capability */
|
427 |
#define SHPC_CAP_LENGTH 0x08 |
428 |
#define SHPC_CAP_DWORD_SELECT 0x2 /* 1 byte */ |
429 |
#define SHPC_CAP_CxP 0x3 /* 1 byte: CSP, CIP */ |
430 |
#define SHPC_CAP_DWORD_DATA 0x4 /* 4 bytes */ |
431 |
#define SHPC_CAP_CSP_MASK 0x4 |
432 |
#define SHPC_CAP_CIP_MASK 0x8 |
433 |
|
434 |
static uint8_t shpc_cap_dword(PCIDevice *d)
|
435 |
{ |
436 |
return pci_get_byte(d->config + d->shpc->cap + SHPC_CAP_DWORD_SELECT);
|
437 |
} |
438 |
|
439 |
/* Update dword data capability register */
|
440 |
static void shpc_cap_update_dword(PCIDevice *d) |
441 |
{ |
442 |
unsigned data;
|
443 |
data = shpc_read(d, shpc_cap_dword(d) * 4, 4); |
444 |
pci_set_long(d->config + d->shpc->cap + SHPC_CAP_DWORD_DATA, data); |
445 |
} |
446 |
|
447 |
/* Add SHPC capability to the config space for the device. */
|
448 |
static int shpc_cap_add_config(PCIDevice *d) |
449 |
{ |
450 |
uint8_t *config; |
451 |
int config_offset;
|
452 |
config_offset = pci_add_capability(d, PCI_CAP_ID_SHPC, |
453 |
0, SHPC_CAP_LENGTH);
|
454 |
if (config_offset < 0) { |
455 |
return config_offset;
|
456 |
} |
457 |
config = d->config + config_offset; |
458 |
|
459 |
pci_set_byte(config + SHPC_CAP_DWORD_SELECT, 0);
|
460 |
pci_set_byte(config + SHPC_CAP_CxP, 0);
|
461 |
pci_set_long(config + SHPC_CAP_DWORD_DATA, 0);
|
462 |
d->shpc->cap = config_offset; |
463 |
/* Make dword select and data writeable. */
|
464 |
pci_set_byte(d->wmask + config_offset + SHPC_CAP_DWORD_SELECT, 0xff);
|
465 |
pci_set_long(d->wmask + config_offset + SHPC_CAP_DWORD_DATA, 0xffffffff);
|
466 |
return 0; |
467 |
} |
468 |
|
469 |
static uint64_t shpc_mmio_read(void *opaque, hwaddr addr, |
470 |
unsigned size)
|
471 |
{ |
472 |
return shpc_read(opaque, addr, size);
|
473 |
} |
474 |
|
475 |
static void shpc_mmio_write(void *opaque, hwaddr addr, |
476 |
uint64_t val, unsigned size)
|
477 |
{ |
478 |
shpc_write(opaque, addr, val, size); |
479 |
} |
480 |
|
481 |
static const MemoryRegionOps shpc_mmio_ops = { |
482 |
.read = shpc_mmio_read, |
483 |
.write = shpc_mmio_write, |
484 |
.endianness = DEVICE_LITTLE_ENDIAN, |
485 |
.valid = { |
486 |
/* SHPC ECN requires dword accesses, but the original 1.0 spec doesn't.
|
487 |
* It's easier to suppport all sizes than worry about it. */
|
488 |
.min_access_size = 1,
|
489 |
.max_access_size = 4,
|
490 |
}, |
491 |
}; |
492 |
|
493 |
static int shpc_device_hotplug(DeviceState *qdev, PCIDevice *affected_dev, |
494 |
PCIHotplugState hotplug_state) |
495 |
{ |
496 |
int pci_slot = PCI_SLOT(affected_dev->devfn);
|
497 |
uint8_t state; |
498 |
uint8_t led; |
499 |
PCIDevice *d = DO_UPCAST(PCIDevice, qdev, qdev); |
500 |
SHPCDevice *shpc = d->shpc; |
501 |
int slot = SHPC_PCI_TO_IDX(pci_slot);
|
502 |
if (pci_slot < SHPC_IDX_TO_PCI(0) || slot >= shpc->nslots) { |
503 |
error_report("Unsupported PCI slot %d for standard hotplug "
|
504 |
"controller. Valid slots are between %d and %d.",
|
505 |
pci_slot, SHPC_IDX_TO_PCI(0),
|
506 |
SHPC_IDX_TO_PCI(shpc->nslots) - 1);
|
507 |
return -1; |
508 |
} |
509 |
/* Don't send event when device is enabled during qemu machine creation:
|
510 |
* it is present on boot, no hotplug event is necessary. We do send an
|
511 |
* event when the device is disabled later. */
|
512 |
if (hotplug_state == PCI_COLDPLUG_ENABLED) {
|
513 |
shpc_set_status(shpc, slot, 0, SHPC_SLOT_STATUS_MRL_OPEN);
|
514 |
shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_7_5W, |
515 |
SHPC_SLOT_STATUS_PRSNT_MASK); |
516 |
return 0; |
517 |
} |
518 |
if (hotplug_state == PCI_HOTPLUG_DISABLED) {
|
519 |
shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= SHPC_SLOT_EVENT_BUTTON; |
520 |
state = shpc_get_status(shpc, slot, SHPC_SLOT_STATE_MASK); |
521 |
led = shpc_get_status(shpc, slot, SHPC_SLOT_PWR_LED_MASK); |
522 |
if (state == SHPC_STATE_DISABLED && led == SHPC_LED_OFF) {
|
523 |
shpc_free_devices_in_slot(shpc, slot); |
524 |
shpc_set_status(shpc, slot, 1, SHPC_SLOT_STATUS_MRL_OPEN);
|
525 |
shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_EMPTY, |
526 |
SHPC_SLOT_STATUS_PRSNT_MASK); |
527 |
shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= |
528 |
SHPC_SLOT_EVENT_MRL | |
529 |
SHPC_SLOT_EVENT_PRESENCE; |
530 |
} |
531 |
} else {
|
532 |
/* This could be a cancellation of the previous removal.
|
533 |
* We check MRL state to figure out. */
|
534 |
if (shpc_get_status(shpc, slot, SHPC_SLOT_STATUS_MRL_OPEN)) {
|
535 |
shpc_set_status(shpc, slot, 0, SHPC_SLOT_STATUS_MRL_OPEN);
|
536 |
shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_7_5W, |
537 |
SHPC_SLOT_STATUS_PRSNT_MASK); |
538 |
shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= |
539 |
SHPC_SLOT_EVENT_BUTTON | |
540 |
SHPC_SLOT_EVENT_MRL | |
541 |
SHPC_SLOT_EVENT_PRESENCE; |
542 |
} else {
|
543 |
/* Press attention button to cancel removal */
|
544 |
shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= |
545 |
SHPC_SLOT_EVENT_BUTTON; |
546 |
} |
547 |
} |
548 |
shpc_set_status(shpc, slot, 0, SHPC_SLOT_STATUS_66);
|
549 |
shpc_interrupt_update(d); |
550 |
return 0; |
551 |
} |
552 |
|
553 |
/* Initialize the SHPC structure in bridge's BAR. */
|
554 |
int shpc_init(PCIDevice *d, PCIBus *sec_bus, MemoryRegion *bar, unsigned offset) |
555 |
{ |
556 |
int i, ret;
|
557 |
int nslots = SHPC_MAX_SLOTS; /* TODO: qdev property? */ |
558 |
SHPCDevice *shpc = d->shpc = g_malloc0(sizeof(*d->shpc));
|
559 |
shpc->sec_bus = sec_bus; |
560 |
ret = shpc_cap_add_config(d); |
561 |
if (ret) {
|
562 |
g_free(d->shpc); |
563 |
return ret;
|
564 |
} |
565 |
if (nslots < SHPC_MIN_SLOTS) {
|
566 |
return 0; |
567 |
} |
568 |
if (nslots > SHPC_MAX_SLOTS ||
|
569 |
SHPC_IDX_TO_PCI(nslots) > PCI_SLOT_MAX) { |
570 |
/* TODO: report an error mesage that makes sense. */
|
571 |
return -EINVAL;
|
572 |
} |
573 |
shpc->nslots = nslots; |
574 |
shpc->config = g_malloc0(SHPC_SIZEOF(d)); |
575 |
shpc->cmask = g_malloc0(SHPC_SIZEOF(d)); |
576 |
shpc->wmask = g_malloc0(SHPC_SIZEOF(d)); |
577 |
shpc->w1cmask = g_malloc0(SHPC_SIZEOF(d)); |
578 |
|
579 |
shpc_reset(d); |
580 |
|
581 |
pci_set_long(shpc->config + SHPC_BASE_OFFSET, offset); |
582 |
|
583 |
pci_set_byte(shpc->wmask + SHPC_CMD_CODE, 0xff);
|
584 |
pci_set_byte(shpc->wmask + SHPC_CMD_TRGT, SHPC_CMD_TRGT_MAX); |
585 |
pci_set_byte(shpc->wmask + SHPC_CMD_TRGT, SHPC_CMD_TRGT_MAX); |
586 |
pci_set_long(shpc->wmask + SHPC_SERR_INT, |
587 |
SHPC_INT_DIS | |
588 |
SHPC_SERR_DIS | |
589 |
SHPC_CMD_INT_DIS | |
590 |
SHPC_ARB_SERR_DIS); |
591 |
pci_set_long(shpc->w1cmask + SHPC_SERR_INT, |
592 |
SHPC_CMD_DETECTED | |
593 |
SHPC_ARB_DETECTED); |
594 |
for (i = 0; i < nslots; ++i) { |
595 |
pci_set_byte(shpc->wmask + |
596 |
SHPC_SLOT_EVENT_SERR_INT_DIS(d, i), |
597 |
SHPC_SLOT_EVENT_PRESENCE | |
598 |
SHPC_SLOT_EVENT_ISOLATED_FAULT | |
599 |
SHPC_SLOT_EVENT_BUTTON | |
600 |
SHPC_SLOT_EVENT_MRL | |
601 |
SHPC_SLOT_EVENT_CONNECTED_FAULT | |
602 |
SHPC_SLOT_EVENT_MRL_SERR_DIS | |
603 |
SHPC_SLOT_EVENT_CONNECTED_FAULT_SERR_DIS); |
604 |
pci_set_byte(shpc->w1cmask + |
605 |
SHPC_SLOT_EVENT_LATCH(i), |
606 |
SHPC_SLOT_EVENT_PRESENCE | |
607 |
SHPC_SLOT_EVENT_ISOLATED_FAULT | |
608 |
SHPC_SLOT_EVENT_BUTTON | |
609 |
SHPC_SLOT_EVENT_MRL | |
610 |
SHPC_SLOT_EVENT_CONNECTED_FAULT); |
611 |
} |
612 |
|
613 |
/* TODO: init cmask */
|
614 |
memory_region_init_io(&shpc->mmio, &shpc_mmio_ops, d, "shpc-mmio",
|
615 |
SHPC_SIZEOF(d)); |
616 |
shpc_cap_update_dword(d); |
617 |
memory_region_add_subregion(bar, offset, &shpc->mmio); |
618 |
pci_bus_hotplug(sec_bus, shpc_device_hotplug, &d->qdev); |
619 |
|
620 |
d->cap_present |= QEMU_PCI_CAP_SHPC; |
621 |
return 0; |
622 |
} |
623 |
|
624 |
int shpc_bar_size(PCIDevice *d)
|
625 |
{ |
626 |
return roundup_pow_of_two(SHPC_SLOT_REG(SHPC_MAX_SLOTS));
|
627 |
} |
628 |
|
629 |
void shpc_cleanup(PCIDevice *d, MemoryRegion *bar)
|
630 |
{ |
631 |
SHPCDevice *shpc = d->shpc; |
632 |
d->cap_present &= ~QEMU_PCI_CAP_SHPC; |
633 |
memory_region_del_subregion(bar, &shpc->mmio); |
634 |
/* TODO: cleanup config space changes? */
|
635 |
g_free(shpc->config); |
636 |
g_free(shpc->cmask); |
637 |
g_free(shpc->wmask); |
638 |
g_free(shpc->w1cmask); |
639 |
memory_region_destroy(&shpc->mmio); |
640 |
g_free(shpc); |
641 |
} |
642 |
|
643 |
void shpc_cap_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l) |
644 |
{ |
645 |
if (!ranges_overlap(addr, l, d->shpc->cap, SHPC_CAP_LENGTH)) {
|
646 |
return;
|
647 |
} |
648 |
if (ranges_overlap(addr, l, d->shpc->cap + SHPC_CAP_DWORD_DATA, 4)) { |
649 |
unsigned dword_data;
|
650 |
dword_data = pci_get_long(d->shpc->config + d->shpc->cap |
651 |
+ SHPC_CAP_DWORD_DATA); |
652 |
shpc_write(d, shpc_cap_dword(d) * 4, dword_data, 4); |
653 |
} |
654 |
/* Update cap dword data in case guest is going to read it. */
|
655 |
shpc_cap_update_dword(d); |
656 |
} |
657 |
|
658 |
static void shpc_save(QEMUFile *f, void *pv, size_t size) |
659 |
{ |
660 |
PCIDevice *d = container_of(pv, PCIDevice, shpc); |
661 |
qemu_put_buffer(f, d->shpc->config, SHPC_SIZEOF(d)); |
662 |
} |
663 |
|
664 |
static int shpc_load(QEMUFile *f, void *pv, size_t size) |
665 |
{ |
666 |
PCIDevice *d = container_of(pv, PCIDevice, shpc); |
667 |
int ret = qemu_get_buffer(f, d->shpc->config, SHPC_SIZEOF(d));
|
668 |
if (ret != SHPC_SIZEOF(d)) {
|
669 |
return -EINVAL;
|
670 |
} |
671 |
/* Make sure we don't lose notifications. An extra interrupt is harmless. */
|
672 |
d->shpc->msi_requested = 0;
|
673 |
shpc_interrupt_update(d); |
674 |
return 0; |
675 |
} |
676 |
|
677 |
VMStateInfo shpc_vmstate_info = { |
678 |
.name = "shpc",
|
679 |
.get = shpc_load, |
680 |
.put = shpc_save, |
681 |
}; |