#include "qemu/osdep.h" #include "qapi/error.h" #include "qemu/host-utils.h" #include "qemu/range.h" #include "qemu/error-report.h" #include "hw/pci/shpc.h" #include "migration/qemu-file-types.h" #include "hw/pci/pci.h" #include "hw/pci/pci_bus.h" #include "hw/pci/msi.h" /* TODO: model power only and disabled slot states. */ /* TODO: handle SERR and wakeups */ /* TODO: consider enabling 66MHz support */ /* TODO: remove fully only on state DISABLED and LED off. * track state to properly record this. */ /* SHPC Working Register Set */ #define SHPC_BASE_OFFSET 0x00 /* 4 bytes */ #define SHPC_SLOTS_33 0x04 /* 4 bytes. Also encodes PCI-X slots. */ #define SHPC_SLOTS_66 0x08 /* 4 bytes. */ #define SHPC_NSLOTS 0x0C /* 1 byte */ #define SHPC_FIRST_DEV 0x0D /* 1 byte */ #define SHPC_PHYS_SLOT 0x0E /* 2 byte */ #define SHPC_PHYS_NUM_MAX 0x7ff #define SHPC_PHYS_NUM_UP 0x2000 #define SHPC_PHYS_MRL 0x4000 #define SHPC_PHYS_BUTTON 0x8000 #define SHPC_SEC_BUS 0x10 /* 2 bytes */ #define SHPC_SEC_BUS_33 0x0 #define SHPC_SEC_BUS_66 0x1 /* Unused */ #define SHPC_SEC_BUS_MASK 0x7 #define SHPC_MSI_CTL 0x12 /* 1 byte */ #define SHPC_PROG_IFC 0x13 /* 1 byte */ #define SHPC_PROG_IFC_1_0 0x1 #define SHPC_CMD_CODE 0x14 /* 1 byte */ #define SHPC_CMD_TRGT 0x15 /* 1 byte */ #define SHPC_CMD_TRGT_MIN 0x1 #define SHPC_CMD_TRGT_MAX 0x1f #define SHPC_CMD_STATUS 0x16 /* 2 bytes */ #define SHPC_CMD_STATUS_BUSY 0x1 #define SHPC_CMD_STATUS_MRL_OPEN 0x2 #define SHPC_CMD_STATUS_INVALID_CMD 0x4 #define SHPC_CMD_STATUS_INVALID_MODE 0x8 #define SHPC_INT_LOCATOR 0x18 /* 4 bytes */ #define SHPC_INT_COMMAND 0x1 #define SHPC_SERR_LOCATOR 0x1C /* 4 bytes */ #define SHPC_SERR_INT 0x20 /* 4 bytes */ #define SHPC_INT_DIS 0x1 #define SHPC_SERR_DIS 0x2 #define SHPC_CMD_INT_DIS 0x4 #define SHPC_ARB_SERR_DIS 0x8 #define SHPC_CMD_DETECTED 0x10000 #define SHPC_ARB_DETECTED 0x20000 /* 4 bytes * slot # (start from 0) */ #define SHPC_SLOT_REG(s) (0x24 + (s) * 4) /* 2 bytes */ #define SHPC_SLOT_STATUS(s) (0x0 + SHPC_SLOT_REG(s)) /* Same slot state masks are used for command and status registers */ #define SHPC_SLOT_STATE_MASK 0x03 #define SHPC_SLOT_STATE_SHIFT \ ctz32(SHPC_SLOT_STATE_MASK) #define SHPC_STATE_NO 0x0 #define SHPC_STATE_PWRONLY 0x1 #define SHPC_STATE_ENABLED 0x2 #define SHPC_STATE_DISABLED 0x3 #define SHPC_SLOT_PWR_LED_MASK 0xC #define SHPC_SLOT_PWR_LED_SHIFT \ ctz32(SHPC_SLOT_PWR_LED_MASK) #define SHPC_SLOT_ATTN_LED_MASK 0x30 #define SHPC_SLOT_ATTN_LED_SHIFT \ ctz32(SHPC_SLOT_ATTN_LED_MASK) #define SHPC_LED_NO 0x0 #define SHPC_LED_ON 0x1 #define SHPC_LED_BLINK 0x2 #define SHPC_LED_OFF 0x3 #define SHPC_SLOT_STATUS_PWR_FAULT 0x40 #define SHPC_SLOT_STATUS_BUTTON 0x80 #define SHPC_SLOT_STATUS_MRL_OPEN 0x100 #define SHPC_SLOT_STATUS_66 0x200 #define SHPC_SLOT_STATUS_PRSNT_MASK 0xC00 #define SHPC_SLOT_STATUS_PRSNT_EMPTY 0x3 #define SHPC_SLOT_STATUS_PRSNT_25W 0x1 #define SHPC_SLOT_STATUS_PRSNT_15W 0x2 #define SHPC_SLOT_STATUS_PRSNT_7_5W 0x0 #define SHPC_SLOT_STATUS_PRSNT_PCIX 0x3000 /* 1 byte */ #define SHPC_SLOT_EVENT_LATCH(s) (0x2 + SHPC_SLOT_REG(s)) /* 1 byte */ #define SHPC_SLOT_EVENT_SERR_INT_DIS(d, s) (0x3 + SHPC_SLOT_REG(s)) #define SHPC_SLOT_EVENT_PRESENCE 0x01 #define SHPC_SLOT_EVENT_ISOLATED_FAULT 0x02 #define SHPC_SLOT_EVENT_BUTTON 0x04 #define SHPC_SLOT_EVENT_MRL 0x08 #define SHPC_SLOT_EVENT_CONNECTED_FAULT 0x10 /* Bits below are used for Serr/Int disable only */ #define SHPC_SLOT_EVENT_MRL_SERR_DIS 0x20 #define SHPC_SLOT_EVENT_CONNECTED_FAULT_SERR_DIS 0x40 #define SHPC_MIN_SLOTS 1 #define SHPC_MAX_SLOTS 31 #define SHPC_SIZEOF(d) SHPC_SLOT_REG((d)->shpc->nslots) /* SHPC Slot identifiers */ /* Hotplug supported at 31 slots out of the total 32. We reserve slot 0, and give the rest of them physical *and* pci numbers starting from 1, so they match logical numbers. Note: this means that multiple slots must have different chassis number values, to make chassis+physical slot unique. TODO: make this configurable? */ #define SHPC_IDX_TO_LOGICAL(slot) ((slot) + 1) #define SHPC_LOGICAL_TO_IDX(target) ((target) - 1) #define SHPC_IDX_TO_PCI(slot) ((slot) + 1) #define SHPC_PCI_TO_IDX(pci_slot) ((pci_slot) - 1) #define SHPC_IDX_TO_PHYSICAL(slot) ((slot) + 1) static uint16_t shpc_get_status(SHPCDevice *shpc, int slot, uint16_t msk) { uint8_t *status = shpc->config + SHPC_SLOT_STATUS(slot); return (pci_get_word(status) & msk) >> ctz32(msk); } static void shpc_set_status(SHPCDevice *shpc, int slot, uint8_t value, uint16_t msk) { uint8_t *status = shpc->config + SHPC_SLOT_STATUS(slot); pci_word_test_and_clear_mask(status, msk); pci_word_test_and_set_mask(status, value << ctz32(msk)); } static void shpc_interrupt_update(PCIDevice *d) { SHPCDevice *shpc = d->shpc; int slot; int level = 0; uint32_t serr_int; uint32_t int_locator = 0; /* Update interrupt locator register */ for (slot = 0; slot < shpc->nslots; ++slot) { uint8_t event = shpc->config[SHPC_SLOT_EVENT_LATCH(slot)]; uint8_t disable = shpc->config[SHPC_SLOT_EVENT_SERR_INT_DIS(d, slot)]; uint32_t mask = 1U << SHPC_IDX_TO_LOGICAL(slot); if (event & ~disable) { int_locator |= mask; } } serr_int = pci_get_long(shpc->config + SHPC_SERR_INT); if ((serr_int & SHPC_CMD_DETECTED) && !(serr_int & SHPC_CMD_INT_DIS)) { int_locator |= SHPC_INT_COMMAND; } pci_set_long(shpc->config + SHPC_INT_LOCATOR, int_locator); level = (!(serr_int & SHPC_INT_DIS) && int_locator) ? 1 : 0; if (msi_enabled(d) && shpc->msi_requested != level) msi_notify(d, 0); else pci_set_irq(d, level); shpc->msi_requested = level; } static void shpc_set_sec_bus_speed(SHPCDevice *shpc, uint8_t speed) { switch (speed) { case SHPC_SEC_BUS_33: shpc->config[SHPC_SEC_BUS] &= ~SHPC_SEC_BUS_MASK; shpc->config[SHPC_SEC_BUS] |= speed; break; default: pci_word_test_and_set_mask(shpc->config + SHPC_CMD_STATUS, SHPC_CMD_STATUS_INVALID_MODE); } } void shpc_reset(PCIDevice *d) { SHPCDevice *shpc = d->shpc; int nslots = shpc->nslots; int i; memset(shpc->config, 0, SHPC_SIZEOF(d)); pci_set_byte(shpc->config + SHPC_NSLOTS, nslots); pci_set_long(shpc->config + SHPC_SLOTS_33, nslots); pci_set_long(shpc->config + SHPC_SLOTS_66, 0); pci_set_byte(shpc->config + SHPC_FIRST_DEV, SHPC_IDX_TO_PCI(0)); pci_set_word(shpc->config + SHPC_PHYS_SLOT, SHPC_IDX_TO_PHYSICAL(0) | SHPC_PHYS_NUM_UP | SHPC_PHYS_MRL | SHPC_PHYS_BUTTON); pci_set_long(shpc->config + SHPC_SERR_INT, SHPC_INT_DIS | SHPC_SERR_DIS | SHPC_CMD_INT_DIS | SHPC_ARB_SERR_DIS); pci_set_byte(shpc->config + SHPC_PROG_IFC, SHPC_PROG_IFC_1_0); pci_set_word(shpc->config + SHPC_SEC_BUS, SHPC_SEC_BUS_33); for (i = 0; i < shpc->nslots; ++i) { pci_set_byte(shpc->config + SHPC_SLOT_EVENT_SERR_INT_DIS(d, i), SHPC_SLOT_EVENT_PRESENCE | SHPC_SLOT_EVENT_ISOLATED_FAULT | SHPC_SLOT_EVENT_BUTTON | SHPC_SLOT_EVENT_MRL | SHPC_SLOT_EVENT_CONNECTED_FAULT | SHPC_SLOT_EVENT_MRL_SERR_DIS | SHPC_SLOT_EVENT_CONNECTED_FAULT_SERR_DIS); if (shpc->sec_bus->devices[PCI_DEVFN(SHPC_IDX_TO_PCI(i), 0)]) { shpc_set_status(shpc, i, SHPC_STATE_ENABLED, SHPC_SLOT_STATE_MASK); shpc_set_status(shpc, i, 0, SHPC_SLOT_STATUS_MRL_OPEN); shpc_set_status(shpc, i, SHPC_SLOT_STATUS_PRSNT_7_5W, SHPC_SLOT_STATUS_PRSNT_MASK); shpc_set_status(shpc, i, SHPC_LED_ON, SHPC_SLOT_PWR_LED_MASK); } else { shpc_set_status(shpc, i, SHPC_STATE_DISABLED, SHPC_SLOT_STATE_MASK); shpc_set_status(shpc, i, 1, SHPC_SLOT_STATUS_MRL_OPEN); shpc_set_status(shpc, i, SHPC_SLOT_STATUS_PRSNT_EMPTY, SHPC_SLOT_STATUS_PRSNT_MASK); shpc_set_status(shpc, i, SHPC_LED_OFF, SHPC_SLOT_PWR_LED_MASK); } shpc_set_status(shpc, i, SHPC_LED_OFF, SHPC_SLOT_ATTN_LED_MASK); shpc_set_status(shpc, i, 0, SHPC_SLOT_STATUS_66); } shpc_set_sec_bus_speed(shpc, SHPC_SEC_BUS_33); shpc->msi_requested = 0; shpc_interrupt_update(d); } static void shpc_invalid_command(SHPCDevice *shpc) { pci_word_test_and_set_mask(shpc->config + SHPC_CMD_STATUS, SHPC_CMD_STATUS_INVALID_CMD); } static void shpc_free_devices_in_slot(SHPCDevice *shpc, int slot) { HotplugHandler *hotplug_ctrl; int devfn; int pci_slot = SHPC_IDX_TO_PCI(slot); for (devfn = PCI_DEVFN(pci_slot, 0); devfn <= PCI_DEVFN(pci_slot, PCI_FUNC_MAX - 1); ++devfn) { PCIDevice *affected_dev = shpc->sec_bus->devices[devfn]; if (affected_dev) { hotplug_ctrl = qdev_get_hotplug_handler(DEVICE(affected_dev)); hotplug_handler_unplug(hotplug_ctrl, DEVICE(affected_dev), &error_abort); object_unparent(OBJECT(affected_dev)); } } } static void shpc_slot_command(SHPCDevice *shpc, uint8_t target, uint8_t state, uint8_t power, uint8_t attn) { uint8_t current_state; int slot = SHPC_LOGICAL_TO_IDX(target); if (target < SHPC_CMD_TRGT_MIN || slot >= shpc->nslots) { shpc_invalid_command(shpc); return; } current_state = shpc_get_status(shpc, slot, SHPC_SLOT_STATE_MASK); if (current_state == SHPC_STATE_ENABLED && state == SHPC_STATE_PWRONLY) { shpc_invalid_command(shpc); return; } switch (power) { case SHPC_LED_NO: break; default: /* TODO: send event to monitor */ shpc_set_status(shpc, slot, power, SHPC_SLOT_PWR_LED_MASK); } switch (attn) { case SHPC_LED_NO: break; default: /* TODO: send event to monitor */ shpc_set_status(shpc, slot, attn, SHPC_SLOT_ATTN_LED_MASK); } if ((current_state == SHPC_STATE_DISABLED && state == SHPC_STATE_PWRONLY) || (current_state == SHPC_STATE_DISABLED && state == SHPC_STATE_ENABLED)) { shpc_set_status(shpc, slot, state, SHPC_SLOT_STATE_MASK); } else if ((current_state == SHPC_STATE_ENABLED || current_state == SHPC_STATE_PWRONLY) && state == SHPC_STATE_DISABLED) { shpc_set_status(shpc, slot, state, SHPC_SLOT_STATE_MASK); power = shpc_get_status(shpc, slot, SHPC_SLOT_PWR_LED_MASK); /* TODO: track what monitor requested. */ /* Look at LED to figure out whether it's ok to remove the device. */ if (power == SHPC_LED_OFF) { shpc_free_devices_in_slot(shpc, slot); shpc_set_status(shpc, slot, 1, SHPC_SLOT_STATUS_MRL_OPEN); shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_EMPTY, SHPC_SLOT_STATUS_PRSNT_MASK); shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= SHPC_SLOT_EVENT_MRL | SHPC_SLOT_EVENT_PRESENCE; } } } static void shpc_command(SHPCDevice *shpc) { uint8_t code = pci_get_byte(shpc->config + SHPC_CMD_CODE); uint8_t speed; uint8_t target; uint8_t attn; uint8_t power; uint8_t state; int i; /* Clear status from the previous command. */ pci_word_test_and_clear_mask(shpc->config + SHPC_CMD_STATUS, SHPC_CMD_STATUS_BUSY | SHPC_CMD_STATUS_MRL_OPEN | SHPC_CMD_STATUS_INVALID_CMD | SHPC_CMD_STATUS_INVALID_MODE); switch (code) { case 0x00 ... 0x3f: target = shpc->config[SHPC_CMD_TRGT] & SHPC_CMD_TRGT_MAX; state = (code & SHPC_SLOT_STATE_MASK) >> SHPC_SLOT_STATE_SHIFT; power = (code & SHPC_SLOT_PWR_LED_MASK) >> SHPC_SLOT_PWR_LED_SHIFT; attn = (code & SHPC_SLOT_ATTN_LED_MASK) >> SHPC_SLOT_ATTN_LED_SHIFT; shpc_slot_command(shpc, target, state, power, attn); break; case 0x40 ... 0x47: speed = code & SHPC_SEC_BUS_MASK; shpc_set_sec_bus_speed(shpc, speed); break; case 0x48: /* Power only all slots */ /* first verify no slots are enabled */ for (i = 0; i < shpc->nslots; ++i) { state = shpc_get_status(shpc, i, SHPC_SLOT_STATE_MASK); if (state == SHPC_STATE_ENABLED) { shpc_invalid_command(shpc); goto done; } } for (i = 0; i < shpc->nslots; ++i) { if (!(shpc_get_status(shpc, i, SHPC_SLOT_STATUS_MRL_OPEN))) { shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN, SHPC_STATE_PWRONLY, SHPC_LED_ON, SHPC_LED_NO); } else { shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN, SHPC_STATE_NO, SHPC_LED_OFF, SHPC_LED_NO); } } break; case 0x49: /* Enable all slots */ /* TODO: Spec says this shall fail if some are already enabled. * This doesn't make sense - why not? a spec bug? */ for (i = 0; i < shpc->nslots; ++i) { state = shpc_get_status(shpc, i, SHPC_SLOT_STATE_MASK); if (state == SHPC_STATE_ENABLED) { shpc_invalid_command(shpc); goto done; } } for (i = 0; i < shpc->nslots; ++i) { if (!(shpc_get_status(shpc, i, SHPC_SLOT_STATUS_MRL_OPEN))) { shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN, SHPC_STATE_ENABLED, SHPC_LED_ON, SHPC_LED_NO); } else { shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN, SHPC_STATE_NO, SHPC_LED_OFF, SHPC_LED_NO); } } break; default: shpc_invalid_command(shpc); break; } done: pci_long_test_and_set_mask(shpc->config + SHPC_SERR_INT, SHPC_CMD_DETECTED); } static void shpc_write(PCIDevice *d, unsigned addr, uint64_t val, int l) { SHPCDevice *shpc = d->shpc; int i; if (addr >= SHPC_SIZEOF(d)) { return; } l = MIN(l, SHPC_SIZEOF(d) - addr); /* TODO: code duplicated from pci.c */ for (i = 0; i < l; val >>= 8, ++i) { unsigned a = addr + i; uint8_t wmask = shpc->wmask[a]; uint8_t w1cmask = shpc->w1cmask[a]; assert(!(wmask & w1cmask)); shpc->config[a] = (shpc->config[a] & ~wmask) | (val & wmask); shpc->config[a] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */ } if (ranges_overlap(addr, l, SHPC_CMD_CODE, 2)) { shpc_command(shpc); } shpc_interrupt_update(d); } static uint64_t shpc_read(PCIDevice *d, unsigned addr, int l) { uint64_t val = 0x0; if (addr >= SHPC_SIZEOF(d)) { return val; } l = MIN(l, SHPC_SIZEOF(d) - addr); memcpy(&val, d->shpc->config + addr, l); return val; } /* SHPC Bridge Capability */ #define SHPC_CAP_LENGTH 0x08 #define SHPC_CAP_DWORD_SELECT 0x2 /* 1 byte */ #define SHPC_CAP_CxP 0x3 /* 1 byte: CSP, CIP */ #define SHPC_CAP_DWORD_DATA 0x4 /* 4 bytes */ #define SHPC_CAP_CSP_MASK 0x4 #define SHPC_CAP_CIP_MASK 0x8 static uint8_t shpc_cap_dword(PCIDevice *d) { return pci_get_byte(d->config + d->shpc->cap + SHPC_CAP_DWORD_SELECT); } /* Update dword data capability register */ static void shpc_cap_update_dword(PCIDevice *d) { unsigned data; data = shpc_read(d, shpc_cap_dword(d) * 4, 4); pci_set_long(d->config + d->shpc->cap + SHPC_CAP_DWORD_DATA, data); } /* Add SHPC capability to the config space for the device. */ static int shpc_cap_add_config(PCIDevice *d, Error **errp) { uint8_t *config; int config_offset; config_offset = pci_add_capability(d, PCI_CAP_ID_SHPC, 0, SHPC_CAP_LENGTH, errp); if (config_offset < 0) { return config_offset; } config = d->config + config_offset; pci_set_byte(config + SHPC_CAP_DWORD_SELECT, 0); pci_set_byte(config + SHPC_CAP_CxP, 0); pci_set_long(config + SHPC_CAP_DWORD_DATA, 0); d->shpc->cap = config_offset; /* Make dword select and data writable. */ pci_set_byte(d->wmask + config_offset + SHPC_CAP_DWORD_SELECT, 0xff); pci_set_long(d->wmask + config_offset + SHPC_CAP_DWORD_DATA, 0xffffffff); return 0; } static uint64_t shpc_mmio_read(void *opaque, hwaddr addr, unsigned size) { return shpc_read(opaque, addr, size); } static void shpc_mmio_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { shpc_write(opaque, addr, val, size); } static const MemoryRegionOps shpc_mmio_ops = { .read = shpc_mmio_read, .write = shpc_mmio_write, .endianness = DEVICE_LITTLE_ENDIAN, .valid = { /* SHPC ECN requires dword accesses, but the original 1.0 spec doesn't. * It's easier to support all sizes than worry about it. */ .min_access_size = 1, .max_access_size = 4, }, }; static void shpc_device_plug_common(PCIDevice *affected_dev, int *slot, SHPCDevice *shpc, Error **errp) { int pci_slot = PCI_SLOT(affected_dev->devfn); *slot = SHPC_PCI_TO_IDX(pci_slot); if (pci_slot < SHPC_IDX_TO_PCI(0) || *slot >= shpc->nslots) { error_setg(errp, "Unsupported PCI slot %d for standard hotplug " "controller. Valid slots are between %d and %d.", pci_slot, SHPC_IDX_TO_PCI(0), SHPC_IDX_TO_PCI(shpc->nslots) - 1); return; } } void shpc_device_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { Error *local_err = NULL; PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev); SHPCDevice *shpc = pci_hotplug_dev->shpc; int slot; shpc_device_plug_common(PCI_DEVICE(dev), &slot, shpc, &local_err); if (local_err) { error_propagate(errp, local_err); return; } /* Don't send event when device is enabled during qemu machine creation: * it is present on boot, no hotplug event is necessary. We do send an * event when the device is disabled later. */ if (!dev->hotplugged) { shpc_set_status(shpc, slot, 0, SHPC_SLOT_STATUS_MRL_OPEN); shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_7_5W, SHPC_SLOT_STATUS_PRSNT_MASK); return; } /* This could be a cancellation of the previous removal. * We check MRL state to figure out. */ if (shpc_get_status(shpc, slot, SHPC_SLOT_STATUS_MRL_OPEN)) { shpc_set_status(shpc, slot, 0, SHPC_SLOT_STATUS_MRL_OPEN); shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_7_5W, SHPC_SLOT_STATUS_PRSNT_MASK); shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= SHPC_SLOT_EVENT_BUTTON | SHPC_SLOT_EVENT_MRL | SHPC_SLOT_EVENT_PRESENCE; } else { /* Press attention button to cancel removal */ shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= SHPC_SLOT_EVENT_BUTTON; } shpc_set_status(shpc, slot, 0, SHPC_SLOT_STATUS_66); shpc_interrupt_update(pci_hotplug_dev); } void shpc_device_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { qdev_unrealize(dev); } void shpc_device_unplug_request_cb(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { Error *local_err = NULL; PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev); SHPCDevice *shpc = pci_hotplug_dev->shpc; uint8_t state; uint8_t led; int slot; shpc_device_plug_common(PCI_DEVICE(dev), &slot, shpc, &local_err); if (local_err) { error_propagate(errp, local_err); return; } state = shpc_get_status(shpc, slot, SHPC_SLOT_STATE_MASK); led = shpc_get_status(shpc, slot, SHPC_SLOT_PWR_LED_MASK); if (led == SHPC_LED_BLINK) { error_setg(errp, "Hot-unplug failed: " "guest is busy (power indicator blinking)"); return; } if (state == SHPC_STATE_DISABLED && led == SHPC_LED_OFF) { shpc_free_devices_in_slot(shpc, slot); shpc_set_status(shpc, slot, 1, SHPC_SLOT_STATUS_MRL_OPEN); shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_EMPTY, SHPC_SLOT_STATUS_PRSNT_MASK); shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= SHPC_SLOT_EVENT_MRL | SHPC_SLOT_EVENT_PRESENCE; } else { shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= SHPC_SLOT_EVENT_BUTTON; } shpc_set_status(shpc, slot, 0, SHPC_SLOT_STATUS_66); shpc_interrupt_update(pci_hotplug_dev); } /* Initialize the SHPC structure in bridge's BAR. */ int shpc_init(PCIDevice *d, PCIBus *sec_bus, MemoryRegion *bar, unsigned offset, Error **errp) { int i, ret; int nslots = SHPC_MAX_SLOTS; /* TODO: qdev property? */ SHPCDevice *shpc = d->shpc = g_malloc0(sizeof(*d->shpc)); shpc->sec_bus = sec_bus; ret = shpc_cap_add_config(d, errp); if (ret) { g_free(d->shpc); return ret; } if (nslots < SHPC_MIN_SLOTS) { return 0; } if (nslots > SHPC_MAX_SLOTS || SHPC_IDX_TO_PCI(nslots) > PCI_SLOT_MAX) { /* TODO: report an error mesage that makes sense. */ return -EINVAL; } shpc->nslots = nslots; shpc->config = g_malloc0(SHPC_SIZEOF(d)); shpc->cmask = g_malloc0(SHPC_SIZEOF(d)); shpc->wmask = g_malloc0(SHPC_SIZEOF(d)); shpc->w1cmask = g_malloc0(SHPC_SIZEOF(d)); shpc_reset(d); pci_set_long(shpc->config + SHPC_BASE_OFFSET, offset); pci_set_byte(shpc->wmask + SHPC_CMD_CODE, 0xff); pci_set_byte(shpc->wmask + SHPC_CMD_TRGT, SHPC_CMD_TRGT_MAX); pci_set_byte(shpc->wmask + SHPC_CMD_TRGT, SHPC_CMD_TRGT_MAX); pci_set_long(shpc->wmask + SHPC_SERR_INT, SHPC_INT_DIS | SHPC_SERR_DIS | SHPC_CMD_INT_DIS | SHPC_ARB_SERR_DIS); pci_set_long(shpc->w1cmask + SHPC_SERR_INT, SHPC_CMD_DETECTED | SHPC_ARB_DETECTED); for (i = 0; i < nslots; ++i) { pci_set_byte(shpc->wmask + SHPC_SLOT_EVENT_SERR_INT_DIS(d, i), SHPC_SLOT_EVENT_PRESENCE | SHPC_SLOT_EVENT_ISOLATED_FAULT | SHPC_SLOT_EVENT_BUTTON | SHPC_SLOT_EVENT_MRL | SHPC_SLOT_EVENT_CONNECTED_FAULT | SHPC_SLOT_EVENT_MRL_SERR_DIS | SHPC_SLOT_EVENT_CONNECTED_FAULT_SERR_DIS); pci_set_byte(shpc->w1cmask + SHPC_SLOT_EVENT_LATCH(i), SHPC_SLOT_EVENT_PRESENCE | SHPC_SLOT_EVENT_ISOLATED_FAULT | SHPC_SLOT_EVENT_BUTTON | SHPC_SLOT_EVENT_MRL | SHPC_SLOT_EVENT_CONNECTED_FAULT); } /* TODO: init cmask */ memory_region_init_io(&shpc->mmio, OBJECT(d), &shpc_mmio_ops, d, "shpc-mmio", SHPC_SIZEOF(d)); shpc_cap_update_dword(d); memory_region_add_subregion(bar, offset, &shpc->mmio); qbus_set_hotplug_handler(BUS(sec_bus), OBJECT(d)); d->cap_present |= QEMU_PCI_CAP_SHPC; return 0; } int shpc_bar_size(PCIDevice *d) { return pow2roundup32(SHPC_SLOT_REG(SHPC_MAX_SLOTS)); } void shpc_cleanup(PCIDevice *d, MemoryRegion *bar) { SHPCDevice *shpc = d->shpc; d->cap_present &= ~QEMU_PCI_CAP_SHPC; memory_region_del_subregion(bar, &shpc->mmio); /* TODO: cleanup config space changes? */ } void shpc_free(PCIDevice *d) { SHPCDevice *shpc = d->shpc; if (!shpc) { return; } object_unparent(OBJECT(&shpc->mmio)); g_free(shpc->config); g_free(shpc->cmask); g_free(shpc->wmask); g_free(shpc->w1cmask); g_free(shpc); d->shpc = NULL; } void shpc_cap_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l) { if (!ranges_overlap(addr, l, d->shpc->cap, SHPC_CAP_LENGTH)) { return; } if (ranges_overlap(addr, l, d->shpc->cap + SHPC_CAP_DWORD_DATA, 4)) { unsigned dword_data; dword_data = pci_get_long(d->shpc->config + d->shpc->cap + SHPC_CAP_DWORD_DATA); shpc_write(d, shpc_cap_dword(d) * 4, dword_data, 4); } /* Update cap dword data in case guest is going to read it. */ shpc_cap_update_dword(d); } static int shpc_save(QEMUFile *f, void *pv, size_t size, const VMStateField *field, JSONWriter *vmdesc) { PCIDevice *d = container_of(pv, PCIDevice, shpc); qemu_put_buffer(f, d->shpc->config, SHPC_SIZEOF(d)); return 0; } static int shpc_load(QEMUFile *f, void *pv, size_t size, const VMStateField *field) { PCIDevice *d = container_of(pv, PCIDevice, shpc); int ret = qemu_get_buffer(f, d->shpc->config, SHPC_SIZEOF(d)); if (ret != SHPC_SIZEOF(d)) { return -EINVAL; } /* Make sure we don't lose notifications. An extra interrupt is harmless. */ d->shpc->msi_requested = 0; shpc_interrupt_update(d); return 0; } VMStateInfo shpc_vmstate_info = { .name = "shpc", .get = shpc_load, .put = shpc_save, };