diff options
Diffstat (limited to 'qemu/hw/pci/shpc.c')
| -rw-r--r-- | qemu/hw/pci/shpc.c | 721 |
1 files changed, 0 insertions, 721 deletions
diff --git a/qemu/hw/pci/shpc.c b/qemu/hw/pci/shpc.c deleted file mode 100644 index 3dcd472eb..000000000 --- a/qemu/hw/pci/shpc.c +++ /dev/null @@ -1,721 +0,0 @@ -#include "qemu/osdep.h" -#include "qapi/error.h" -#include "qemu-common.h" -#include "qemu/range.h" -#include "qemu/error-report.h" -#include "hw/pci/shpc.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 int roundup_pow_of_two(int x) -{ - x |= (x >> 1); - x |= (x >> 2); - x |= (x >> 4); - x |= (x >> 8); - x |= (x >> 16); - return x + 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, 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) -{ - 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) { - 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_BUTTON | - 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) -{ - uint8_t *config; - int config_offset; - config_offset = pci_add_capability(d, PCI_CAP_ID_SHPC, - 0, SHPC_CAP_LENGTH); - 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 writeable. */ - 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 suppport 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) -{ - 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_hotplug_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); - 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_hot_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); - 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 (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; - } - 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) -{ - 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); - 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), DEVICE(d), NULL); - - d->cap_present |= QEMU_PCI_CAP_SHPC; - return 0; -} - -int shpc_bar_size(PCIDevice *d) -{ - return roundup_pow_of_two(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 void shpc_save(QEMUFile *f, void *pv, size_t size) -{ - PCIDevice *d = container_of(pv, PCIDevice, shpc); - qemu_put_buffer(f, d->shpc->config, SHPC_SIZEOF(d)); -} - -static int shpc_load(QEMUFile *f, void *pv, size_t size) -{ - 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, -}; |