diff options
Diffstat (limited to 'hw/pcie.c')
| -rw-r--r-- | hw/pcie.c | 555 |
1 files changed, 0 insertions, 555 deletions
diff --git a/hw/pcie.c b/hw/pcie.c deleted file mode 100644 index 7c92f193e7..0000000000 --- a/hw/pcie.c +++ /dev/null @@ -1,555 +0,0 @@ -/* - * pcie.c - * - * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp> - * VA Linux Systems Japan K.K. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, see <http://www.gnu.org/licenses/>. - */ - -#include "qemu-common.h" -#include "pci_bridge.h" -#include "pcie.h" -#include "msix.h" -#include "msi.h" -#include "pci_internals.h" -#include "pcie_regs.h" -#include "range.h" - -//#define DEBUG_PCIE -#ifdef DEBUG_PCIE -# define PCIE_DPRINTF(fmt, ...) \ - fprintf(stderr, "%s:%d " fmt, __func__, __LINE__, ## __VA_ARGS__) -#else -# define PCIE_DPRINTF(fmt, ...) do {} while (0) -#endif -#define PCIE_DEV_PRINTF(dev, fmt, ...) \ - PCIE_DPRINTF("%s:%x "fmt, (dev)->name, (dev)->devfn, ## __VA_ARGS__) - - -/*************************************************************************** - * pci express capability helper functions - */ -int pcie_cap_init(PCIDevice *dev, uint8_t offset, uint8_t type, uint8_t port) -{ - int pos; - uint8_t *exp_cap; - - assert(pci_is_express(dev)); - - pos = pci_add_capability(dev, PCI_CAP_ID_EXP, offset, - PCI_EXP_VER2_SIZEOF); - if (pos < 0) { - return pos; - } - dev->exp.exp_cap = pos; - exp_cap = dev->config + pos; - - /* capability register - interrupt message number defaults to 0 */ - pci_set_word(exp_cap + PCI_EXP_FLAGS, - ((type << PCI_EXP_FLAGS_TYPE_SHIFT) & PCI_EXP_FLAGS_TYPE) | - PCI_EXP_FLAGS_VER2); - - /* device capability register - * table 7-12: - * roll based error reporting bit must be set by all - * Functions conforming to the ECN, PCI Express Base - * Specification, Revision 1.1., or subsequent PCI Express Base - * Specification revisions. - */ - pci_set_long(exp_cap + PCI_EXP_DEVCAP, PCI_EXP_DEVCAP_RBER); - - pci_set_long(exp_cap + PCI_EXP_LNKCAP, - (port << PCI_EXP_LNKCAP_PN_SHIFT) | - PCI_EXP_LNKCAP_ASPMS_0S | - PCI_EXP_LNK_MLW_1 | - PCI_EXP_LNK_LS_25); - - pci_set_word(exp_cap + PCI_EXP_LNKSTA, - PCI_EXP_LNK_MLW_1 | PCI_EXP_LNK_LS_25); - - pci_set_long(exp_cap + PCI_EXP_DEVCAP2, - PCI_EXP_DEVCAP2_EFF | PCI_EXP_DEVCAP2_EETLPP); - - pci_set_word(dev->wmask + pos, PCI_EXP_DEVCTL2_EETLPPB); - return pos; -} - -void pcie_cap_exit(PCIDevice *dev) -{ - pci_del_capability(dev, PCI_CAP_ID_EXP, PCI_EXP_VER2_SIZEOF); -} - -uint8_t pcie_cap_get_type(const PCIDevice *dev) -{ - uint32_t pos = dev->exp.exp_cap; - assert(pos > 0); - return (pci_get_word(dev->config + pos + PCI_EXP_FLAGS) & - PCI_EXP_FLAGS_TYPE) >> PCI_EXP_FLAGS_TYPE_SHIFT; -} - -/* MSI/MSI-X */ -/* pci express interrupt message number */ -/* 7.8.2 PCI Express Capabilities Register: Interrupt Message Number */ -void pcie_cap_flags_set_vector(PCIDevice *dev, uint8_t vector) -{ - uint8_t *exp_cap = dev->config + dev->exp.exp_cap; - assert(vector < 32); - pci_word_test_and_clear_mask(exp_cap + PCI_EXP_FLAGS, PCI_EXP_FLAGS_IRQ); - pci_word_test_and_set_mask(exp_cap + PCI_EXP_FLAGS, - vector << PCI_EXP_FLAGS_IRQ_SHIFT); -} - -uint8_t pcie_cap_flags_get_vector(PCIDevice *dev) -{ - return (pci_get_word(dev->config + dev->exp.exp_cap + PCI_EXP_FLAGS) & - PCI_EXP_FLAGS_IRQ) >> PCI_EXP_FLAGS_IRQ_SHIFT; -} - -void pcie_cap_deverr_init(PCIDevice *dev) -{ - uint32_t pos = dev->exp.exp_cap; - pci_long_test_and_set_mask(dev->config + pos + PCI_EXP_DEVCAP, - PCI_EXP_DEVCAP_RBER); - pci_long_test_and_set_mask(dev->wmask + pos + PCI_EXP_DEVCTL, - PCI_EXP_DEVCTL_CERE | PCI_EXP_DEVCTL_NFERE | - PCI_EXP_DEVCTL_FERE | PCI_EXP_DEVCTL_URRE); - pci_long_test_and_set_mask(dev->w1cmask + pos + PCI_EXP_DEVSTA, - PCI_EXP_DEVSTA_CED | PCI_EXP_DEVSTA_NFED | - PCI_EXP_DEVSTA_URD | PCI_EXP_DEVSTA_URD); -} - -void pcie_cap_deverr_reset(PCIDevice *dev) -{ - uint8_t *devctl = dev->config + dev->exp.exp_cap + PCI_EXP_DEVCTL; - pci_long_test_and_clear_mask(devctl, - PCI_EXP_DEVCTL_CERE | PCI_EXP_DEVCTL_NFERE | - PCI_EXP_DEVCTL_FERE | PCI_EXP_DEVCTL_URRE); -} - -static void hotplug_event_update_event_status(PCIDevice *dev) -{ - uint32_t pos = dev->exp.exp_cap; - uint8_t *exp_cap = dev->config + pos; - uint16_t sltctl = pci_get_word(exp_cap + PCI_EXP_SLTCTL); - uint16_t sltsta = pci_get_word(exp_cap + PCI_EXP_SLTSTA); - - dev->exp.hpev_notified = (sltctl & PCI_EXP_SLTCTL_HPIE) && - (sltsta & sltctl & PCI_EXP_HP_EV_SUPPORTED); -} - -static void hotplug_event_notify(PCIDevice *dev) -{ - bool prev = dev->exp.hpev_notified; - - hotplug_event_update_event_status(dev); - - if (prev == dev->exp.hpev_notified) { - return; - } - - /* Note: the logic above does not take into account whether interrupts - * are masked. The result is that interrupt will be sent when it is - * subsequently unmasked. This appears to be legal: Section 6.7.3.4: - * The Port may optionally send an MSI when there are hot-plug events that - * occur while interrupt generation is disabled, and interrupt generation is - * subsequently enabled. */ - if (msix_enabled(dev)) { - msix_notify(dev, pcie_cap_flags_get_vector(dev)); - } else if (msi_enabled(dev)) { - msi_notify(dev, pcie_cap_flags_get_vector(dev)); - } else { - qemu_set_irq(dev->irq[dev->exp.hpev_intx], dev->exp.hpev_notified); - } -} - -static void hotplug_event_clear(PCIDevice *dev) -{ - hotplug_event_update_event_status(dev); - if (!msix_enabled(dev) && !msi_enabled(dev) && !dev->exp.hpev_notified) { - qemu_set_irq(dev->irq[dev->exp.hpev_intx], 0); - } -} - -/* - * A PCI Express Hot-Plug Event has occurred, so update slot status register - * and notify OS of the event if necessary. - * - * 6.7.3 PCI Express Hot-Plug Events - * 6.7.3.4 Software Notification of Hot-Plug Events - */ -static void pcie_cap_slot_event(PCIDevice *dev, PCIExpressHotPlugEvent event) -{ - /* Minor optimization: if nothing changed - no event is needed. */ - if (pci_word_test_and_set_mask(dev->config + dev->exp.exp_cap + - PCI_EXP_SLTSTA, event)) { - return; - } - hotplug_event_notify(dev); -} - -static int pcie_cap_slot_hotplug(DeviceState *qdev, - PCIDevice *pci_dev, PCIHotplugState state) -{ - PCIDevice *d = PCI_DEVICE(qdev); - uint8_t *exp_cap = d->config + d->exp.exp_cap; - uint16_t sltsta = pci_get_word(exp_cap + PCI_EXP_SLTSTA); - - /* 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 (state == PCI_COLDPLUG_ENABLED) { - pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTSTA, - PCI_EXP_SLTSTA_PDS); - return 0; - } - - PCIE_DEV_PRINTF(pci_dev, "hotplug state: %d\n", state); - if (sltsta & PCI_EXP_SLTSTA_EIS) { - /* the slot is electromechanically locked. - * This error is propagated up to qdev and then to HMP/QMP. - */ - return -EBUSY; - } - - /* TODO: multifunction hot-plug. - * Right now, only a device of function = 0 is allowed to be - * hot plugged/unplugged. - */ - assert(PCI_FUNC(pci_dev->devfn) == 0); - - if (state == PCI_HOTPLUG_ENABLED) { - pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTSTA, - PCI_EXP_SLTSTA_PDS); - pcie_cap_slot_event(d, PCI_EXP_HP_EV_PDC); - } else { - qdev_free(&pci_dev->qdev); - pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTSTA, - PCI_EXP_SLTSTA_PDS); - pcie_cap_slot_event(d, PCI_EXP_HP_EV_PDC); - } - return 0; -} - -/* pci express slot for pci express root/downstream port - PCI express capability slot registers */ -void pcie_cap_slot_init(PCIDevice *dev, uint16_t slot) -{ - uint32_t pos = dev->exp.exp_cap; - - pci_word_test_and_set_mask(dev->config + pos + PCI_EXP_FLAGS, - PCI_EXP_FLAGS_SLOT); - - pci_long_test_and_clear_mask(dev->config + pos + PCI_EXP_SLTCAP, - ~PCI_EXP_SLTCAP_PSN); - pci_long_test_and_set_mask(dev->config + pos + PCI_EXP_SLTCAP, - (slot << PCI_EXP_SLTCAP_PSN_SHIFT) | - PCI_EXP_SLTCAP_EIP | - PCI_EXP_SLTCAP_HPS | - PCI_EXP_SLTCAP_HPC | - PCI_EXP_SLTCAP_PIP | - PCI_EXP_SLTCAP_AIP | - PCI_EXP_SLTCAP_ABP); - - pci_word_test_and_clear_mask(dev->config + pos + PCI_EXP_SLTCTL, - PCI_EXP_SLTCTL_PIC | - PCI_EXP_SLTCTL_AIC); - pci_word_test_and_set_mask(dev->config + pos + PCI_EXP_SLTCTL, - PCI_EXP_SLTCTL_PIC_OFF | - PCI_EXP_SLTCTL_AIC_OFF); - pci_word_test_and_set_mask(dev->wmask + pos + PCI_EXP_SLTCTL, - PCI_EXP_SLTCTL_PIC | - PCI_EXP_SLTCTL_AIC | - PCI_EXP_SLTCTL_HPIE | - PCI_EXP_SLTCTL_CCIE | - PCI_EXP_SLTCTL_PDCE | - PCI_EXP_SLTCTL_ABPE); - /* Although reading PCI_EXP_SLTCTL_EIC returns always 0, - * make the bit writable here in order to detect 1b is written. - * pcie_cap_slot_write_config() test-and-clear the bit, so - * this bit always returns 0 to the guest. - */ - pci_word_test_and_set_mask(dev->wmask + pos + PCI_EXP_SLTCTL, - PCI_EXP_SLTCTL_EIC); - - pci_word_test_and_set_mask(dev->w1cmask + pos + PCI_EXP_SLTSTA, - PCI_EXP_HP_EV_SUPPORTED); - - dev->exp.hpev_notified = false; - - pci_bus_hotplug(pci_bridge_get_sec_bus(DO_UPCAST(PCIBridge, dev, dev)), - pcie_cap_slot_hotplug, &dev->qdev); -} - -void pcie_cap_slot_reset(PCIDevice *dev) -{ - uint8_t *exp_cap = dev->config + dev->exp.exp_cap; - - PCIE_DEV_PRINTF(dev, "reset\n"); - - pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTCTL, - PCI_EXP_SLTCTL_EIC | - PCI_EXP_SLTCTL_PIC | - PCI_EXP_SLTCTL_AIC | - PCI_EXP_SLTCTL_HPIE | - PCI_EXP_SLTCTL_CCIE | - PCI_EXP_SLTCTL_PDCE | - PCI_EXP_SLTCTL_ABPE); - pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTCTL, - PCI_EXP_SLTCTL_PIC_OFF | - PCI_EXP_SLTCTL_AIC_OFF); - - pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTSTA, - PCI_EXP_SLTSTA_EIS |/* on reset, - the lock is released */ - PCI_EXP_SLTSTA_CC | - PCI_EXP_SLTSTA_PDC | - PCI_EXP_SLTSTA_ABP); - - hotplug_event_update_event_status(dev); -} - -void pcie_cap_slot_write_config(PCIDevice *dev, - uint32_t addr, uint32_t val, int len) -{ - uint32_t pos = dev->exp.exp_cap; - uint8_t *exp_cap = dev->config + pos; - uint16_t sltsta = pci_get_word(exp_cap + PCI_EXP_SLTSTA); - - if (ranges_overlap(addr, len, pos + PCI_EXP_SLTSTA, 2)) { - hotplug_event_clear(dev); - } - - if (!ranges_overlap(addr, len, pos + PCI_EXP_SLTCTL, 2)) { - return; - } - - if (pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTCTL, - PCI_EXP_SLTCTL_EIC)) { - sltsta ^= PCI_EXP_SLTSTA_EIS; /* toggle PCI_EXP_SLTSTA_EIS bit */ - pci_set_word(exp_cap + PCI_EXP_SLTSTA, sltsta); - PCIE_DEV_PRINTF(dev, "PCI_EXP_SLTCTL_EIC: " - "sltsta -> 0x%02"PRIx16"\n", - sltsta); - } - - hotplug_event_notify(dev); - - /* - * 6.7.3.2 Command Completed Events - * - * Software issues a command to a hot-plug capable Downstream Port by - * issuing a write transaction that targets any portion of the Port’s Slot - * Control register. A single write to the Slot Control register is - * considered to be a single command, even if the write affects more than - * one field in the Slot Control register. In response to this transaction, - * the Port must carry out the requested actions and then set the - * associated status field for the command completed event. */ - - /* Real hardware might take a while to complete requested command because - * physical movement would be involved like locking the electromechanical - * lock. However in our case, command is completed instantaneously above, - * so send a command completion event right now. - */ - pcie_cap_slot_event(dev, PCI_EXP_HP_EV_CCI); -} - -int pcie_cap_slot_post_load(void *opaque, int version_id) -{ - PCIDevice *dev = opaque; - hotplug_event_update_event_status(dev); - return 0; -} - -void pcie_cap_slot_push_attention_button(PCIDevice *dev) -{ - pcie_cap_slot_event(dev, PCI_EXP_HP_EV_ABP); -} - -/* root control/capabilities/status. PME isn't emulated for now */ -void pcie_cap_root_init(PCIDevice *dev) -{ - pci_set_word(dev->wmask + dev->exp.exp_cap + PCI_EXP_RTCTL, - PCI_EXP_RTCTL_SECEE | PCI_EXP_RTCTL_SENFEE | - PCI_EXP_RTCTL_SEFEE); -} - -void pcie_cap_root_reset(PCIDevice *dev) -{ - pci_set_word(dev->config + dev->exp.exp_cap + PCI_EXP_RTCTL, 0); -} - -/* function level reset(FLR) */ -void pcie_cap_flr_init(PCIDevice *dev) -{ - pci_long_test_and_set_mask(dev->config + dev->exp.exp_cap + PCI_EXP_DEVCAP, - PCI_EXP_DEVCAP_FLR); - - /* Although reading BCR_FLR returns always 0, - * the bit is made writable here in order to detect the 1b is written - * pcie_cap_flr_write_config() test-and-clear the bit, so - * this bit always returns 0 to the guest. - */ - pci_word_test_and_set_mask(dev->wmask + dev->exp.exp_cap + PCI_EXP_DEVCTL, - PCI_EXP_DEVCTL_BCR_FLR); -} - -void pcie_cap_flr_write_config(PCIDevice *dev, - uint32_t addr, uint32_t val, int len) -{ - uint8_t *devctl = dev->config + dev->exp.exp_cap + PCI_EXP_DEVCTL; - if (pci_get_word(devctl) & PCI_EXP_DEVCTL_BCR_FLR) { - /* Clear PCI_EXP_DEVCTL_BCR_FLR after invoking the reset handler - so the handler can detect FLR by looking at this bit. */ - pci_device_reset(dev); - pci_word_test_and_clear_mask(devctl, PCI_EXP_DEVCTL_BCR_FLR); - } -} - -/* Alternative Routing-ID Interpretation (ARI) */ -/* ari forwarding support for down stream port */ -void pcie_cap_ari_init(PCIDevice *dev) -{ - uint32_t pos = dev->exp.exp_cap; - pci_long_test_and_set_mask(dev->config + pos + PCI_EXP_DEVCAP2, - PCI_EXP_DEVCAP2_ARI); - pci_long_test_and_set_mask(dev->wmask + pos + PCI_EXP_DEVCTL2, - PCI_EXP_DEVCTL2_ARI); -} - -void pcie_cap_ari_reset(PCIDevice *dev) -{ - uint8_t *devctl2 = dev->config + dev->exp.exp_cap + PCI_EXP_DEVCTL2; - pci_long_test_and_clear_mask(devctl2, PCI_EXP_DEVCTL2_ARI); -} - -bool pcie_cap_is_ari_enabled(const PCIDevice *dev) -{ - if (!pci_is_express(dev)) { - return false; - } - if (!dev->exp.exp_cap) { - return false; - } - - return pci_get_long(dev->config + dev->exp.exp_cap + PCI_EXP_DEVCTL2) & - PCI_EXP_DEVCTL2_ARI; -} - -/************************************************************************** - * pci express extended capability allocation functions - * uint16_t ext_cap_id (16 bit) - * uint8_t cap_ver (4 bit) - * uint16_t cap_offset (12 bit) - * uint16_t ext_cap_size - */ - -static uint16_t pcie_find_capability_list(PCIDevice *dev, uint16_t cap_id, - uint16_t *prev_p) -{ - uint16_t prev = 0; - uint16_t next; - uint32_t header = pci_get_long(dev->config + PCI_CONFIG_SPACE_SIZE); - - if (!header) { - /* no extended capability */ - next = 0; - goto out; - } - for (next = PCI_CONFIG_SPACE_SIZE; next; - prev = next, next = PCI_EXT_CAP_NEXT(header)) { - - assert(next >= PCI_CONFIG_SPACE_SIZE); - assert(next <= PCIE_CONFIG_SPACE_SIZE - 8); - - header = pci_get_long(dev->config + next); - if (PCI_EXT_CAP_ID(header) == cap_id) { - break; - } - } - -out: - if (prev_p) { - *prev_p = prev; - } - return next; -} - -uint16_t pcie_find_capability(PCIDevice *dev, uint16_t cap_id) -{ - return pcie_find_capability_list(dev, cap_id, NULL); -} - -static void pcie_ext_cap_set_next(PCIDevice *dev, uint16_t pos, uint16_t next) -{ - uint16_t header = pci_get_long(dev->config + pos); - assert(!(next & (PCI_EXT_CAP_ALIGN - 1))); - header = (header & ~PCI_EXT_CAP_NEXT_MASK) | - ((next << PCI_EXT_CAP_NEXT_SHIFT) & PCI_EXT_CAP_NEXT_MASK); - pci_set_long(dev->config + pos, header); -} - -/* - * caller must supply valid (offset, size) * such that the range shouldn't - * overlap with other capability or other registers. - * This function doesn't check it. - */ -void pcie_add_capability(PCIDevice *dev, - uint16_t cap_id, uint8_t cap_ver, - uint16_t offset, uint16_t size) -{ - uint32_t header; - uint16_t next; - - assert(offset >= PCI_CONFIG_SPACE_SIZE); - assert(offset < offset + size); - assert(offset + size < PCIE_CONFIG_SPACE_SIZE); - assert(size >= 8); - assert(pci_is_express(dev)); - - if (offset == PCI_CONFIG_SPACE_SIZE) { - header = pci_get_long(dev->config + offset); - next = PCI_EXT_CAP_NEXT(header); - } else { - uint16_t prev; - - /* 0 is reserved cap id. use internally to find the last capability - in the linked list */ - next = pcie_find_capability_list(dev, 0, &prev); - - assert(prev >= PCI_CONFIG_SPACE_SIZE); - assert(next == 0); - pcie_ext_cap_set_next(dev, prev, offset); - } - pci_set_long(dev->config + offset, PCI_EXT_CAP(cap_id, cap_ver, next)); - - /* Make capability read-only by default */ - memset(dev->wmask + offset, 0, size); - memset(dev->w1cmask + offset, 0, size); - /* Check capability by default */ - memset(dev->cmask + offset, 0xFF, size); -} - -/************************************************************************** - * pci express extended capability helper functions - */ - -/* ARI */ -void pcie_ari_init(PCIDevice *dev, uint16_t offset, uint16_t nextfn) -{ - pcie_add_capability(dev, PCI_EXT_CAP_ID_ARI, PCI_ARI_VER, - offset, PCI_ARI_SIZEOF); - pci_set_long(dev->config + offset + PCI_ARI_CAP, PCI_ARI_CAP_NFN(nextfn)); -} |