| #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 uint8_t shpc_get_status(SHPCDevice *shpc, int slot, uint16_t msk) |
| { |
| uint8_t *status = shpc->config + SHPC_SLOT_STATUS(slot); |
| uint16_t result = (pci_get_word(status) & msk) >> ctz32(msk); |
| |
| assert(result <= UINT8_MAX); |
| return result; |
| } |
| |
| 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 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) |
| { |
| 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; |
| } |
| |
| if (old_state == SHPC_STATE_ENABLED && state == SHPC_STATE_PWRONLY) { |
| shpc_invalid_command(shpc); |
| return; |
| } |
| |
| 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); |
| } |
| |
| 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 (state == SHPC_STATE_NO) { |
| state = old_state; |
| } else { |
| shpc_set_status(shpc, slot, state, SHPC_SLOT_STATE_MASK); |
| } |
| |
| 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(PCIDevice *d) |
| { |
| SHPCDevice *shpc = d->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(d, 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(d, i + SHPC_CMD_TRGT_MIN, |
| SHPC_STATE_PWRONLY, SHPC_LED_ON, SHPC_LED_NO); |
| } else { |
| shpc_slot_command(d, 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(d, i + SHPC_CMD_TRGT_MIN, |
| SHPC_STATE_ENABLED, SHPC_LED_ON, SHPC_LED_NO); |
| } else { |
| shpc_slot_command(d, 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(d); |
| } |
| 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 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); |
| |
| 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 false; |
| } |
| |
| return true; |
| } |
| |
| void shpc_device_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, |
| Error **errp) |
| { |
| PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev); |
| SHPCDevice *shpc = pci_hotplug_dev->shpc; |
| int slot; |
| |
| if (!shpc_device_get_slot(PCI_DEVICE(dev), &slot, shpc, errp)) { |
| 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) |
| { |
| PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev); |
| SHPCDevice *shpc = pci_hotplug_dev->shpc; |
| uint8_t state; |
| uint8_t led; |
| int slot; |
| |
| if (!shpc_device_get_slot(PCI_DEVICE(dev), &slot, shpc, errp)) { |
| 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, |
| }; |
