682 lines
24 KiB
C
682 lines
24 KiB
C
#include <strings.h>
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#include <stdint.h>
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#include "qemu/range.h"
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#include "qemu/range.h"
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#include "hw/pci/shpc.h"
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#include "hw/pci/pci.h"
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#include "hw/pci/pci_bus.h"
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#include "hw/pci/msi.h"
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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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/* TODO: remove fully only on state DISABLED and LED off.
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* track state to properly record this. */
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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 */
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#define SHPC_PHYS_NUM_MAX 0x7ff
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#define SHPC_PHYS_NUM_UP 0x2000
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#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 */
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#define SHPC_SEC_BUS_MASK 0x7
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#define SHPC_MSI_CTL 0x12 /* 1 byte */
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#define SHPC_PROG_IFC 0x13 /* 1 byte */
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#define SHPC_PROG_IFC_1_0 0x1
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#define SHPC_CMD_CODE 0x14 /* 1 byte */
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#define SHPC_CMD_TRGT 0x15 /* 1 byte */
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#define SHPC_CMD_TRGT_MIN 0x1
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#define SHPC_CMD_TRGT_MAX 0x1f
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#define SHPC_CMD_STATUS 0x16 /* 2 bytes */
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#define SHPC_CMD_STATUS_BUSY 0x1
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#define SHPC_CMD_STATUS_MRL_OPEN 0x2
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#define SHPC_CMD_STATUS_INVALID_CMD 0x4
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#define SHPC_CMD_STATUS_INVALID_MODE 0x8
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#define SHPC_INT_LOCATOR 0x18 /* 4 bytes */
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#define SHPC_INT_COMMAND 0x1
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#define SHPC_SERR_LOCATOR 0x1C /* 4 bytes */
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#define SHPC_SERR_INT 0x20 /* 4 bytes */
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#define SHPC_INT_DIS 0x1
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#define SHPC_SERR_DIS 0x2
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#define SHPC_CMD_INT_DIS 0x4
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#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))
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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
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#define SHPC_SLOT_STATE_SHIFT \
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(ffs(SHPC_SLOT_STATE_MASK) - 1)
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#define SHPC_STATE_NO 0x0
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#define SHPC_STATE_PWRONLY 0x1
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#define SHPC_STATE_ENABLED 0x2
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#define SHPC_STATE_DISABLED 0x3
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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)
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#define SHPC_LED_NO 0x0
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#define SHPC_LED_ON 0x1
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#define SHPC_LED_BLINK 0x2
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#define SHPC_LED_OFF 0x3
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#define SHPC_SLOT_STATUS_PWR_FAULT 0x40
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#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
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#define SHPC_SLOT_STATUS_PRSNT_EMPTY 0x3
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#define SHPC_SLOT_STATUS_PRSNT_25W 0x1
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#define SHPC_SLOT_STATUS_PRSNT_15W 0x2
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#define SHPC_SLOT_STATUS_PRSNT_7_5W 0x0
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#define SHPC_SLOT_STATUS_PRSNT_PCIX 0x3000
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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))
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#define SHPC_SLOT_EVENT_PRESENCE 0x01
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#define SHPC_SLOT_EVENT_ISOLATED_FAULT 0x02
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#define SHPC_SLOT_EVENT_BUTTON 0x04
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#define SHPC_SLOT_EVENT_MRL 0x08
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#define SHPC_SLOT_EVENT_CONNECTED_FAULT 0x10
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/* Bits below are used for Serr/Int disable only */
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#define SHPC_SLOT_EVENT_MRL_SERR_DIS 0x20
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#define SHPC_SLOT_EVENT_CONNECTED_FAULT_SERR_DIS 0x40
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#define SHPC_MIN_SLOTS 1
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#define SHPC_MAX_SLOTS 31
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#define SHPC_SIZEOF(d) SHPC_SLOT_REG((d)->shpc->nslots)
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/* SHPC Slot identifiers */
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/* 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
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they match logical numbers. Note: this means that multiple slots must have
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different chassis number values, to make chassis+physical slot unique.
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TODO: make this configurable? */
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#define SHPC_IDX_TO_LOGICAL(slot) ((slot) + 1)
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#define SHPC_LOGICAL_TO_IDX(target) ((target) - 1)
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#define SHPC_IDX_TO_PCI(slot) ((slot) + 1)
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#define SHPC_PCI_TO_IDX(pci_slot) ((pci_slot) - 1)
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#define SHPC_IDX_TO_PHYSICAL(slot) ((slot) + 1)
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static int roundup_pow_of_two(int x)
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{
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x |= (x >> 1);
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x |= (x >> 2);
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x |= (x >> 4);
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x |= (x >> 8);
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x |= (x >> 16);
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return x + 1;
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}
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static uint16_t shpc_get_status(SHPCDevice *shpc, int slot, uint16_t msk)
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{
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uint8_t *status = shpc->config + SHPC_SLOT_STATUS(slot);
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return (pci_get_word(status) & msk) >> (ffs(msk) - 1);
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}
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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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{
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uint8_t *status = shpc->config + SHPC_SLOT_STATUS(slot);
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pci_word_test_and_clear_mask(status, msk);
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pci_word_test_and_set_mask(status, value << (ffs(msk) - 1));
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}
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static void shpc_interrupt_update(PCIDevice *d)
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{
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SHPCDevice *shpc = d->shpc;
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int slot;
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int level = 0;
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uint32_t serr_int;
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uint32_t int_locator = 0;
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/* Update interrupt locator register */
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for (slot = 0; slot < shpc->nslots; ++slot) {
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uint8_t event = shpc->config[SHPC_SLOT_EVENT_LATCH(slot)];
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uint8_t disable = shpc->config[SHPC_SLOT_EVENT_SERR_INT_DIS(d, slot)];
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uint32_t mask = 1 << SHPC_IDX_TO_LOGICAL(slot);
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if (event & ~disable) {
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int_locator |= mask;
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}
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}
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serr_int = pci_get_long(shpc->config + SHPC_SERR_INT);
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if ((serr_int & SHPC_CMD_DETECTED) && !(serr_int & SHPC_CMD_INT_DIS)) {
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int_locator |= SHPC_INT_COMMAND;
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}
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pci_set_long(shpc->config + SHPC_INT_LOCATOR, int_locator);
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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);
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else
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qemu_set_irq(d->irq[0], level);
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shpc->msi_requested = level;
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}
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static void shpc_set_sec_bus_speed(SHPCDevice *shpc, uint8_t speed)
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{
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switch (speed) {
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case SHPC_SEC_BUS_33:
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shpc->config[SHPC_SEC_BUS] &= ~SHPC_SEC_BUS_MASK;
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shpc->config[SHPC_SEC_BUS] |= speed;
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break;
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default:
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pci_word_test_and_set_mask(shpc->config + SHPC_CMD_STATUS,
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SHPC_CMD_STATUS_INVALID_MODE);
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}
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}
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void shpc_reset(PCIDevice *d)
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{
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SHPCDevice *shpc = d->shpc;
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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);
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pci_set_long(shpc->config + SHPC_SLOTS_33, nslots);
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pci_set_long(shpc->config + SHPC_SLOTS_66, 0);
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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);
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pci_set_long(shpc->config + SHPC_SERR_INT, SHPC_INT_DIS |
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SHPC_SERR_DIS |
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SHPC_CMD_INT_DIS |
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SHPC_ARB_SERR_DIS);
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pci_set_byte(shpc->config + SHPC_PROG_IFC, SHPC_PROG_IFC_1_0);
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pci_set_word(shpc->config + SHPC_SEC_BUS, SHPC_SEC_BUS_33);
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for (i = 0; i < shpc->nslots; ++i) {
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pci_set_byte(shpc->config + SHPC_SLOT_EVENT_SERR_INT_DIS(d, i),
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SHPC_SLOT_EVENT_PRESENCE |
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SHPC_SLOT_EVENT_ISOLATED_FAULT |
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SHPC_SLOT_EVENT_BUTTON |
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SHPC_SLOT_EVENT_MRL |
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SHPC_SLOT_EVENT_CONNECTED_FAULT |
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SHPC_SLOT_EVENT_MRL_SERR_DIS |
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SHPC_SLOT_EVENT_CONNECTED_FAULT_SERR_DIS);
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if (shpc->sec_bus->devices[PCI_DEVFN(SHPC_IDX_TO_PCI(i), 0)]) {
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shpc_set_status(shpc, i, SHPC_STATE_ENABLED, SHPC_SLOT_STATE_MASK);
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shpc_set_status(shpc, i, 0, SHPC_SLOT_STATUS_MRL_OPEN);
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shpc_set_status(shpc, i, SHPC_SLOT_STATUS_PRSNT_7_5W,
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SHPC_SLOT_STATUS_PRSNT_MASK);
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shpc_set_status(shpc, i, SHPC_LED_ON, SHPC_SLOT_PWR_LED_MASK);
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} else {
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shpc_set_status(shpc, i, SHPC_STATE_DISABLED, SHPC_SLOT_STATE_MASK);
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shpc_set_status(shpc, i, 1, SHPC_SLOT_STATUS_MRL_OPEN);
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shpc_set_status(shpc, i, SHPC_SLOT_STATUS_PRSNT_EMPTY,
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SHPC_SLOT_STATUS_PRSNT_MASK);
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shpc_set_status(shpc, i, SHPC_LED_OFF, SHPC_SLOT_PWR_LED_MASK);
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}
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shpc_set_status(shpc, i, 0, SHPC_SLOT_STATUS_66);
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}
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shpc_set_sec_bus_speed(shpc, SHPC_SEC_BUS_33);
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shpc->msi_requested = 0;
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shpc_interrupt_update(d);
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}
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static void shpc_invalid_command(SHPCDevice *shpc)
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{
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pci_word_test_and_set_mask(shpc->config + SHPC_CMD_STATUS,
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SHPC_CMD_STATUS_INVALID_CMD);
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}
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static void shpc_free_devices_in_slot(SHPCDevice *shpc, int slot)
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{
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int devfn;
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int pci_slot = SHPC_IDX_TO_PCI(slot);
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for (devfn = PCI_DEVFN(pci_slot, 0);
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devfn <= PCI_DEVFN(pci_slot, PCI_FUNC_MAX - 1);
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++devfn) {
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PCIDevice *affected_dev = shpc->sec_bus->devices[devfn];
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if (affected_dev) {
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qdev_free(&affected_dev->qdev);
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}
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}
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}
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static void shpc_slot_command(SHPCDevice *shpc, uint8_t target,
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uint8_t state, uint8_t power, uint8_t attn)
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{
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uint8_t current_state;
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int slot = SHPC_LOGICAL_TO_IDX(target);
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if (target < SHPC_CMD_TRGT_MIN || slot >= shpc->nslots) {
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shpc_invalid_command(shpc);
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return;
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}
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current_state = shpc_get_status(shpc, slot, SHPC_SLOT_STATE_MASK);
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if (current_state == SHPC_STATE_ENABLED && state == SHPC_STATE_PWRONLY) {
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shpc_invalid_command(shpc);
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return;
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}
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switch (power) {
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case SHPC_LED_NO:
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break;
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default:
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/* TODO: send event to monitor */
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shpc_set_status(shpc, slot, power, SHPC_SLOT_PWR_LED_MASK);
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}
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switch (attn) {
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case SHPC_LED_NO:
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break;
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default:
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/* TODO: send event to monitor */
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shpc_set_status(shpc, slot, attn, SHPC_SLOT_ATTN_LED_MASK);
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}
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if ((current_state == SHPC_STATE_DISABLED && state == SHPC_STATE_PWRONLY) ||
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(current_state == SHPC_STATE_DISABLED && state == SHPC_STATE_ENABLED)) {
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shpc_set_status(shpc, slot, state, SHPC_SLOT_STATE_MASK);
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} else if ((current_state == SHPC_STATE_ENABLED ||
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current_state == SHPC_STATE_PWRONLY) &&
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state == SHPC_STATE_DISABLED) {
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shpc_set_status(shpc, slot, state, SHPC_SLOT_STATE_MASK);
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power = shpc_get_status(shpc, slot, SHPC_SLOT_PWR_LED_MASK);
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/* TODO: track what monitor requested. */
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/* Look at LED to figure out whether it's ok to remove the device. */
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if (power == SHPC_LED_OFF) {
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shpc_free_devices_in_slot(shpc, slot);
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shpc_set_status(shpc, slot, 1, SHPC_SLOT_STATUS_MRL_OPEN);
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shpc_set_status(shpc, slot, SHPC_SLOT_STATUS_PRSNT_EMPTY,
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SHPC_SLOT_STATUS_PRSNT_MASK);
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shpc->config[SHPC_SLOT_EVENT_LATCH(slot)] |=
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SHPC_SLOT_EVENT_BUTTON |
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SHPC_SLOT_EVENT_MRL |
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SHPC_SLOT_EVENT_PRESENCE;
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}
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}
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}
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static void shpc_command(SHPCDevice *shpc)
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{
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uint8_t code = pci_get_byte(shpc->config + SHPC_CMD_CODE);
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uint8_t speed;
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uint8_t target;
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uint8_t attn;
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uint8_t power;
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uint8_t state;
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int i;
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/* Clear status from the previous command. */
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pci_word_test_and_clear_mask(shpc->config + SHPC_CMD_STATUS,
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SHPC_CMD_STATUS_BUSY |
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SHPC_CMD_STATUS_MRL_OPEN |
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SHPC_CMD_STATUS_INVALID_CMD |
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SHPC_CMD_STATUS_INVALID_MODE);
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switch (code) {
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case 0x00 ... 0x3f:
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target = shpc->config[SHPC_CMD_TRGT] & SHPC_CMD_TRGT_MAX;
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state = (code & SHPC_SLOT_STATE_MASK) >> SHPC_SLOT_STATE_SHIFT;
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power = (code & SHPC_SLOT_PWR_LED_MASK) >> SHPC_SLOT_PWR_LED_SHIFT;
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attn = (code & SHPC_SLOT_ATTN_LED_MASK) >> SHPC_SLOT_ATTN_LED_SHIFT;
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shpc_slot_command(shpc, target, state, power, attn);
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break;
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case 0x40 ... 0x47:
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speed = code & SHPC_SEC_BUS_MASK;
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shpc_set_sec_bus_speed(shpc, speed);
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break;
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case 0x48:
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/* Power only all slots */
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/* first verify no slots are enabled */
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for (i = 0; i < shpc->nslots; ++i) {
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state = shpc_get_status(shpc, i, SHPC_SLOT_STATE_MASK);
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if (state == SHPC_STATE_ENABLED) {
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shpc_invalid_command(shpc);
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goto done;
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}
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}
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for (i = 0; i < shpc->nslots; ++i) {
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if (!(shpc_get_status(shpc, i, SHPC_SLOT_STATUS_MRL_OPEN))) {
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shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN,
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SHPC_STATE_PWRONLY, SHPC_LED_ON, SHPC_LED_NO);
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} else {
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shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN,
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SHPC_STATE_NO, SHPC_LED_OFF, SHPC_LED_NO);
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}
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}
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break;
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case 0x49:
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/* Enable all slots */
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/* TODO: Spec says this shall fail if some are already enabled.
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* This doesn't make sense - why not? a spec bug? */
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for (i = 0; i < shpc->nslots; ++i) {
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state = shpc_get_status(shpc, i, SHPC_SLOT_STATE_MASK);
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if (state == SHPC_STATE_ENABLED) {
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shpc_invalid_command(shpc);
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goto done;
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}
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}
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for (i = 0; i < shpc->nslots; ++i) {
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if (!(shpc_get_status(shpc, i, SHPC_SLOT_STATUS_MRL_OPEN))) {
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shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN,
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SHPC_STATE_ENABLED, SHPC_LED_ON, SHPC_LED_NO);
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} else {
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shpc_slot_command(shpc, i + SHPC_CMD_TRGT_MIN,
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SHPC_STATE_NO, SHPC_LED_OFF, SHPC_LED_NO);
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}
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}
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break;
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default:
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shpc_invalid_command(shpc);
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break;
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}
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done:
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pci_long_test_and_set_mask(shpc->config + SHPC_SERR_INT, SHPC_CMD_DETECTED);
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}
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static void shpc_write(PCIDevice *d, unsigned addr, uint64_t val, int l)
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{
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SHPCDevice *shpc = d->shpc;
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int i;
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if (addr >= SHPC_SIZEOF(d)) {
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return;
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}
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l = MIN(l, SHPC_SIZEOF(d) - addr);
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/* TODO: code duplicated from pci.c */
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for (i = 0; i < l; val >>= 8, ++i) {
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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 int shpc_device_hotplug(DeviceState *qdev, PCIDevice *affected_dev,
|
|
PCIHotplugState hotplug_state)
|
|
{
|
|
int pci_slot = PCI_SLOT(affected_dev->devfn);
|
|
uint8_t state;
|
|
uint8_t led;
|
|
PCIDevice *d = DO_UPCAST(PCIDevice, qdev, qdev);
|
|
SHPCDevice *shpc = d->shpc;
|
|
int slot = SHPC_PCI_TO_IDX(pci_slot);
|
|
if (pci_slot < SHPC_IDX_TO_PCI(0) || slot >= shpc->nslots) {
|
|
error_report("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 -1;
|
|
}
|
|
/* 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 (hotplug_state == PCI_COLDPLUG_ENABLED) {
|
|
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 0;
|
|
}
|
|
if (hotplug_state == PCI_HOTPLUG_DISABLED) {
|
|
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;
|
|
}
|
|
} else {
|
|
/* 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(d);
|
|
return 0;
|
|
}
|
|
|
|
/* 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, &shpc_mmio_ops, d, "shpc-mmio",
|
|
SHPC_SIZEOF(d));
|
|
shpc_cap_update_dword(d);
|
|
memory_region_add_subregion(bar, offset, &shpc->mmio);
|
|
pci_bus_hotplug(sec_bus, shpc_device_hotplug, &d->qdev);
|
|
|
|
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? */
|
|
g_free(shpc->config);
|
|
g_free(shpc->cmask);
|
|
g_free(shpc->wmask);
|
|
g_free(shpc->w1cmask);
|
|
memory_region_destroy(&shpc->mmio);
|
|
g_free(shpc);
|
|
}
|
|
|
|
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,
|
|
};
|