diff options
Diffstat (limited to 'hw/pci/shpc.c')
| -rw-r--r-- | hw/pci/shpc.c | 200 |
1 files changed, 136 insertions, 64 deletions
diff --git a/hw/pci/shpc.c b/hw/pci/shpc.c index a8462d48bb..aac6f2d034 100644 --- a/hw/pci/shpc.c +++ b/hw/pci/shpc.c @@ -1,13 +1,14 @@ #include "qemu/osdep.h" #include "qapi/error.h" -#include "qemu-common.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" +#include "trace.h" /* TODO: model power only and disabled slot states. */ /* TODO: handle SERR and wakeups */ @@ -123,10 +124,41 @@ #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) +static const char *shpc_led_state_to_str(uint8_t value) +{ + switch (value) { + case SHPC_LED_ON: + return "on"; + case SHPC_LED_BLINK: + return "blink"; + case SHPC_LED_OFF: + return "off"; + default: + return "invalid"; + } +} + +static const char *shpc_slot_state_to_str(uint8_t value) +{ + switch (value) { + case SHPC_STATE_PWRONLY: + return "power-only"; + case SHPC_STATE_ENABLED: + return "enabled"; + case SHPC_STATE_DISABLED: + return "disabled"; + default: + return "invalid"; + } +} + +static uint8_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); + uint16_t result = (pci_get_word(status) & msk) >> ctz32(msk); + + assert(result <= UINT8_MAX); + return result; } static void shpc_set_status(SHPCDevice *shpc, @@ -223,6 +255,7 @@ void shpc_reset(PCIDevice *d) 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); @@ -238,6 +271,7 @@ static void shpc_invalid_command(SHPCDevice *shpc) 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); @@ -245,66 +279,91 @@ static void shpc_free_devices_in_slot(SHPCDevice *shpc, int slot) ++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, +static bool shpc_slot_is_off(uint8_t state, uint8_t power, uint8_t attn) +{ + return state == SHPC_STATE_DISABLED && power == SHPC_LED_OFF; +} + +static void shpc_slot_command(PCIDevice *d, uint8_t target, uint8_t state, uint8_t power, uint8_t attn) { - uint8_t current_state; + SHPCDevice *shpc = d->shpc; int slot = SHPC_LOGICAL_TO_IDX(target); + uint8_t old_state = shpc_get_status(shpc, slot, SHPC_SLOT_STATE_MASK); + uint8_t old_power = shpc_get_status(shpc, slot, SHPC_SLOT_PWR_LED_MASK); + uint8_t old_attn = shpc_get_status(shpc, slot, SHPC_SLOT_ATTN_LED_MASK); + 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) { + + if (old_state == SHPC_STATE_ENABLED && state == SHPC_STATE_PWRONLY) { shpc_invalid_command(shpc); return; } - switch (power) { - case SHPC_LED_NO: - break; - default: + if (power == SHPC_LED_NO) { + power = old_power; + } else { /* TODO: send event to monitor */ shpc_set_status(shpc, slot, power, SHPC_SLOT_PWR_LED_MASK); } - switch (attn) { - case SHPC_LED_NO: - break; - default: + + if (attn == SHPC_LED_NO) { + attn = old_attn; + } else { /* 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) { + if (state == SHPC_STATE_NO) { + state = old_state; + } else { 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_BUTTON | - SHPC_SLOT_EVENT_MRL | - SHPC_SLOT_EVENT_PRESENCE; - } + } + + if (trace_event_get_state_backends(TRACE_SHPC_SLOT_COMMAND)) { + DeviceState *parent = DEVICE(d); + int pci_slot = SHPC_IDX_TO_PCI(slot); + DeviceState *child = + DEVICE(shpc->sec_bus->devices[PCI_DEVFN(pci_slot, 0)]); + + trace_shpc_slot_command( + parent->canonical_path, pci_slot, + child ? child->canonical_path : "no-child", + shpc_led_state_to_str(old_power), + shpc_led_state_to_str(power), + shpc_led_state_to_str(old_attn), + shpc_led_state_to_str(attn), + shpc_slot_state_to_str(old_state), + shpc_slot_state_to_str(state)); + } + + if (!shpc_slot_is_off(old_state, old_power, old_attn) && + shpc_slot_is_off(state, power, attn)) + { + 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) +static void shpc_command(PCIDevice *d) { + SHPCDevice *shpc = d->shpc; uint8_t code = pci_get_byte(shpc->config + SHPC_CMD_CODE); uint8_t speed; uint8_t target; @@ -325,7 +384,7 @@ static void shpc_command(SHPCDevice *shpc) 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); + shpc_slot_command(d, target, state, power, attn); break; case 0x40 ... 0x47: speed = code & SHPC_SEC_BUS_MASK; @@ -343,10 +402,10 @@ static void shpc_command(SHPCDevice *shpc) } 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_slot_command(d, 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_slot_command(d, i + SHPC_CMD_TRGT_MIN, SHPC_STATE_NO, SHPC_LED_OFF, SHPC_LED_NO); } } @@ -364,10 +423,10 @@ static void shpc_command(SHPCDevice *shpc) } 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_slot_command(d, 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_slot_command(d, i + SHPC_CMD_TRGT_MIN, SHPC_STATE_NO, SHPC_LED_OFF, SHPC_LED_NO); } } @@ -399,7 +458,7 @@ static void shpc_write(PCIDevice *d, unsigned addr, uint64_t val, int l) shpc->config[a] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */ } if (ranges_overlap(addr, l, SHPC_CMD_CODE, 2)) { - shpc_command(shpc); + shpc_command(d); } shpc_interrupt_update(d); } @@ -453,7 +512,7 @@ static int shpc_cap_add_config(PCIDevice *d, Error **errp) 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 writeable. */ + /* 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; @@ -477,13 +536,15 @@ static const MemoryRegionOps shpc_mmio_ops = { .endianness = DEVICE_LITTLE_ENDIAN, .valid = { /* SHPC ECN requires dword accesses, but the original 1.0 spec doesn't. - * It's easier to suppport all sizes than worry about it. */ + * It's easier to support all sizes than worry about it. + */ .min_access_size = 1, .max_access_size = 4, }, }; -static void shpc_device_hotplug_common(PCIDevice *affected_dev, int *slot, - SHPCDevice *shpc, Error **errp) + +static bool shpc_device_get_slot(PCIDevice *affected_dev, int *slot, + SHPCDevice *shpc, Error **errp) { int pci_slot = PCI_SLOT(affected_dev->devfn); *slot = SHPC_PCI_TO_IDX(pci_slot); @@ -493,21 +554,20 @@ static void shpc_device_hotplug_common(PCIDevice *affected_dev, int *slot, "controller. Valid slots are between %d and %d.", pci_slot, SHPC_IDX_TO_PCI(0), SHPC_IDX_TO_PCI(shpc->nslots) - 1); - return; + return false; } + + return true; } -void shpc_device_hotplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, +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_hotplug_common(PCI_DEVICE(dev), &slot, shpc, &local_err); - if (local_err) { - error_propagate(errp, local_err); + if (!shpc_device_get_slot(PCI_DEVICE(dev), &slot, shpc, errp)) { return; } @@ -540,25 +600,34 @@ void shpc_device_hotplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, shpc_interrupt_update(pci_hotplug_dev); } -void shpc_device_hot_unplug_request_cb(HotplugHandler *hotplug_dev, - DeviceState *dev, Error **errp) +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_hotplug_common(PCI_DEVICE(dev), &slot, shpc, &local_err); - if (local_err) { - error_propagate(errp, local_err); + if (!shpc_device_get_slot(PCI_DEVICE(dev), &slot, shpc, errp)) { return; } - shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |= SHPC_SLOT_EVENT_BUTTON; 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); @@ -567,6 +636,8 @@ void shpc_device_hot_unplug_request_cb(HotplugHandler *hotplug_dev, 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); @@ -590,7 +661,7 @@ int shpc_init(PCIDevice *d, PCIBus *sec_bus, MemoryRegion *bar, } if (nslots > SHPC_MAX_SLOTS || SHPC_IDX_TO_PCI(nslots) > PCI_SLOT_MAX) { - /* TODO: report an error mesage that makes sense. */ + /* TODO: report an error message that makes sense. */ return -EINVAL; } shpc->nslots = nslots; @@ -639,7 +710,7 @@ int shpc_init(PCIDevice *d, PCIBus *sec_bus, MemoryRegion *bar, shpc_cap_update_dword(d); memory_region_add_subregion(bar, offset, &shpc->mmio); - qbus_set_hotplug_handler(BUS(sec_bus), DEVICE(d), NULL); + qbus_set_hotplug_handler(BUS(sec_bus), OBJECT(d)); d->cap_present |= QEMU_PCI_CAP_SHPC; return 0; @@ -688,8 +759,8 @@ void shpc_cap_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l) shpc_cap_update_dword(d); } -static int shpc_save(QEMUFile *f, void *pv, size_t size, VMStateField *field, - QJSON *vmdesc) +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)); @@ -697,7 +768,8 @@ static int shpc_save(QEMUFile *f, void *pv, size_t size, VMStateField *field, return 0; } -static int shpc_load(QEMUFile *f, void *pv, size_t size, VMStateField *field) +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)); @@ -710,7 +782,7 @@ static int shpc_load(QEMUFile *f, void *pv, size_t size, VMStateField *field) return 0; } -VMStateInfo shpc_vmstate_info = { +const VMStateInfo shpc_vmstate_info = { .name = "shpc", .get = shpc_load, .put = shpc_save, |