This patch implements helper functions for pci express capability
and pci express extended capability allocation.
NOTE: presence detection depends on pci_qdev_init() change.
Signed-off-by: Isaku Yamahata <yamah...@valinux.co.jp>
---
Changes v2 -> v3:
- don't use 0b gcc extension. use 0x instead.
- split out constants into pcie_regs.h for linux merge.
- export some helpers for pcie-aer split.
- split out aer helper functions from pcie.c to pcie_aer.c
- embed PCIExpressDevice into PCIDevice.
---
Makefile.objs | 1 +
hw/pci.h | 12 +
hw/pcie.c | 638 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
hw/pcie.h | 96 +++++++++
qemu-common.h | 1 +
5 files changed, 748 insertions(+), 0 deletions(-)
create mode 100644 hw/pcie.c
create mode 100644 hw/pcie.h
diff --git a/Makefile.objs b/Makefile.objs
index 5f5a4c5..eeb5134 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -186,6 +186,7 @@ hw-obj-$(CONFIG_PIIX4) += piix4.o
# PCI watchdog devices
hw-obj-y += wdt_i6300esb.o
+hw-obj-y += pcie.o
hw-obj-y += msix.o msi.o
# PCI network cards
diff --git a/hw/pci.h b/hw/pci.h
index 630631b..19e85f5 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -9,6 +9,8 @@
/* PCI includes legacy ISA access. */
#include "isa.h"
+#include "pcie.h"
+
/* PCI bus */
#define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
@@ -175,6 +177,9 @@ struct PCIDevice {
/* Offset of MSI capability in config space */
uint8_t msi_cap;
+ /* PCI Express */
+ PCIExpressDevice exp;
+
/* Location of option rom */
char *romfile;
ram_addr_t rom_offset;
@@ -389,6 +394,13 @@ static inline uint32_t pci_config_size(const PCIDevice *d)
return pci_is_express(d) ? PCIE_CONFIG_SPACE_SIZE : PCI_CONFIG_SPACE_SIZE;
}
+/* These are pci express specific, so should belong to pcie.h.
+ they're here to avoid mutual header dependency. */
+static inline uint8_t pci_pcie_cap(const PCIDevice *d)
+{
+ return pci_is_express(d) ? d->exp.exp_cap : 0;
+}
+
/* These are not pci specific. Should move into a separate header.
* Only pci.c uses them, so keep them here for now.
*/
diff --git a/hw/pcie.c b/hw/pcie.c
new file mode 100644
index 0000000..a6f396b
--- /dev/null
+++ b/hw/pcie.c
@@ -0,0 +1,638 @@
+/*
+ * 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 "sysemu.h"
+#include "pci_bridge.h"
+#include "pcie.h"
+#include "msix.h"
+#include "msi.h"
+#include "pci_internals.h"
+#include "pcie_regs.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__)
+
+static inline const char *pcie_hp_event_name(enum PCIExpressHotPlugEvent event)
+{
+ switch (event) {
+ case PCI_EXP_HP_EV_ABP:
+ return "attention button pushed";
+ case PCI_EXP_HP_EV_PDC:
+ return "present detection changed";
+ case PCI_EXP_HP_EV_CCI:
+ return "command completed";
+ default:
+ break;
+ }
+ return "Unknown event";
+}
+
+/***************************************************************************
+ * pci express capability helper functions
+ */
+void pcie_notify(PCIDevice *dev, uint16_t vector, bool trigger, int level)
+{
+ /* masking/masking interrupt is handled by upper layer.
+ * i.e. msix_notify() for MSI-X
+ * msi_notify() for MSI
+ * pci_set_irq() for INTx
+ */
+ PCIE_DEV_PRINTF(dev, "noitfy vector %d tirgger:%d level:%d\n",
+ vector, trigger, level);
+ if (msix_enabled(dev)) {
+ if (trigger) {
+ msix_notify(dev, vector);
+ }
+ } else if (msi_enabled(dev)) {
+ if (trigger){
+ msi_notify(dev, vector);
+ }
+ } else {
+ qemu_set_irq(dev->irq[0], level);
+ }
+}
+
+int pcie_cap_init(PCIDevice *dev, uint8_t offset, uint8_t type, uint8_t port)
+{
+ int exp_cap;
+ uint8_t *pcie_cap;
+
+ assert(pci_is_express(dev));
+
+ exp_cap = pci_add_capability(dev, PCI_CAP_ID_EXP, offset,
+ PCI_EXP_VER2_SIZEOF);
+ if (exp_cap < 0) {
+ return exp_cap;
+ }
+ dev->exp.exp_cap = exp_cap;
+
+ /* already done in pci_qdev_init() */
+ assert(dev->cap_present & QEMU_PCI_CAP_EXPRESS);
+
+ pcie_cap = dev->config + pci_pcie_cap(dev);
+
+ /* capability register
+ interrupt message number defaults to 0 */
+ pci_set_word(pcie_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(pcie_cap + PCI_EXP_DEVCAP, PCI_EXP_DEVCAP_RBER);
+
+ pci_set_long(pcie_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(pcie_cap + PCI_EXP_LNKSTA,
+ PCI_EXP_LNK_MLW_1 | PCI_EXP_LNK_LS_25);
+
+ pci_set_long(pcie_cap + PCI_EXP_DEVCAP2,
+ PCI_EXP_DEVCAP2_EFF | PCI_EXP_DEVCAP2_EETLPP);
+
+ pci_set_word(dev->wmask + exp_cap, PCI_EXP_DEVCTL2_EETLPPB);
+ return exp_cap;
+}
+
+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 = pci_pcie_cap(dev);
+ 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 */
+void pcie_cap_flags_set_vector(PCIDevice *dev, uint8_t vector)
+{
+ uint8_t *pcie_cap = dev->config + pci_pcie_cap(dev);
+ uint16_t tmp;
+
+ assert(vector <= 32);
+ tmp = pci_get_word(pcie_cap + PCI_EXP_FLAGS);
+ tmp &= ~PCI_EXP_FLAGS_IRQ;
+ tmp |= vector << PCI_EXP_FLAGS_IRQ_SHIFT;
+ pci_set_word(pcie_cap + PCI_EXP_FLAGS, tmp);
+}
+
+uint8_t pcie_cap_flags_get_vector(PCIDevice *dev)
+{
+ return (pci_get_word(dev->config + pci_pcie_cap(dev) + PCI_EXP_FLAGS) &
+ PCI_EXP_FLAGS_IRQ) >> PCI_EXP_FLAGS_IRQ_SHIFT;
+}
+
+void pcie_cap_deverr_init(PCIDevice *dev)
+{
+ uint32_t pos = pci_pcie_cap(dev);
+ uint8_t *pcie_cap = dev->config + pos;
+ uint8_t *pcie_wmask = dev->wmask + pos;
+ uint8_t *pcie_w1cmask = dev->wmask + pos;
+
+ pci_set_long(pcie_cap + PCI_EXP_DEVCAP,
+ pci_get_long(pcie_cap + PCI_EXP_DEVCAP) |
+ PCI_EXP_DEVCAP_RBER);
+
+ pci_set_long(pcie_wmask + PCI_EXP_DEVCTL,
+ pci_get_long(pcie_wmask + PCI_EXP_DEVCTL) |
+ PCI_EXP_DEVCTL_CERE | PCI_EXP_DEVCTL_NFERE |
+ PCI_EXP_DEVCTL_FERE | PCI_EXP_DEVCTL_URRE);
+
+ pci_set_long(pcie_w1cmask + PCI_EXP_DEVSTA,
+ pci_get_long(pcie_w1cmask + 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 *pcie_cap = dev->config + pci_pcie_cap(dev);
+ pci_set_long(pcie_cap + PCI_EXP_DEVCTL,
+ pci_get_long(pcie_cap + PCI_EXP_DEVCTL) &
+ ~(PCI_EXP_DEVCTL_CERE | PCI_EXP_DEVCTL_NFERE |
+ PCI_EXP_DEVCTL_FERE | PCI_EXP_DEVCTL_URRE));
+}
+
+/*
+ * events: PCI_EXP_HP_EV_xxx
+ * status: bit or of PCI_EXP_SLTSTA_xxx
+ */
+static void pcie_cap_slot_event(PCIDevice *dev,
+ enum PCIExpressHotPlugEvent events,
+ uint16_t status)
+{
+ bool trigger;
+ int level;
+ uint8_t *pcie_cap = dev->config + pci_pcie_cap(dev);
+ uint16_t sltctl = pci_get_word(pcie_cap + PCI_EXP_SLTCTL);
+ uint16_t sltsta = pci_get_word(pcie_cap + PCI_EXP_SLTSTA);
+
+ PCIE_DEV_PRINTF(dev,
+ "sltctl: 0x%0x2 sltsta: 0x%02x event:%x %s status:%d\n",
+ sltctl, sltsta,
+ events, pcie_hp_event_name(events), status);
+ events &= PCI_EXP_HP_EV_SUPPORTED;
+ if ((sltctl & PCI_EXP_SLTCTL_HPIE) && (sltctl & events) &&
+ ((sltsta ^ events) & events) /* 0 -> 1 */) {
+ trigger = true;
+ } else {
+ trigger = false;
+ }
+
+ if (events & PCI_EXP_HP_EV_PDC) {
+ sltsta &= ~PCI_EXP_SLTSTA_PDS;
+ sltsta |= (status & PCI_EXP_SLTSTA_PDS);
+ }
+ sltsta |= events;
+ pci_set_word(pcie_cap + PCI_EXP_SLTSTA, sltsta);
+ PCIE_DEV_PRINTF(dev, "sltsta -> %02xn", sltsta);
+
+ if ((sltctl & PCI_EXP_SLTCTL_HPIE) && (sltsta & PCI_EXP_HP_EV_SUPPORTED)) {
+ level = 1;
+ } else {
+ level = 0;
+ }
+
+ pcie_notify(dev, pcie_cap_flags_get_vector(dev), trigger, level);
+}
+
+static int pcie_cap_slot_hotplug(DeviceState *qdev,
+ PCIDevice *pci_dev, int state)
+{
+ PCIDevice *d = DO_UPCAST(PCIDevice, qdev, qdev);
+ uint8_t *pcie_cap = d->config + pci_pcie_cap(d);
+ uint16_t sltsta = pci_get_word(pcie_cap + PCI_EXP_SLTSTA);
+
+ if (!pci_dev->qdev.hotplugged) {
+ assert(state); /* this case only happens machine creation. */
+ sltsta |= PCI_EXP_SLTSTA_PDS;
+ pci_set_word(pcie_cap + PCI_EXP_SLTSTA, sltsta);
+ return 0;
+ }
+
+ PCIE_DEV_PRINTF(pci_dev, "hotplug state: %d\n", state);
+ if (sltsta & PCI_EXP_SLTSTA_EIS) {
+ /* the slot is electromechanically locked. */
+ return -EBUSY;
+ }
+
+ if (state) {
+ if (PCI_FUNC(pci_dev->devfn) == 0) {
+ /* event is per slot. Not per function
+ * only generates event for function = 0.
+ * When hot plug, populate functions > 0
+ * and then add function = 0 last.
+ */
+ pcie_cap_slot_event(d, PCI_EXP_HP_EV_PDC, PCI_EXP_SLTSTA_PDS);
+ }
+ } else {
+ PCIBridge *br;
+ PCIBus *bus;
+ DeviceState *next;
+ if (PCI_FUNC(pci_dev->devfn) != 0) {
+ /* event is per slot. Not per function.
+ accepts function = 0 only. */
+ return -EINVAL;
+ }
+
+ /* zap all functions. */
+ br = DO_UPCAST(PCIBridge, dev, d);
+ bus = pci_bridge_get_sec_bus(br);
+ QLIST_FOREACH_SAFE(qdev, &bus->qbus.children, sibling, next) {
+ qdev_free(qdev);
+ }
+
+ pcie_cap_slot_event(d, PCI_EXP_HP_EV_PDC, 0);
+ }
+ 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)
+{
+ uint8_t *pcie_cap = dev->config + pci_pcie_cap(dev);
+ uint8_t *pcie_wmask = dev->wmask + pci_pcie_cap(dev);
+ uint8_t *pcie_w1cmask = dev->w1cmask + pci_pcie_cap(dev);
+ uint32_t tmp;
+
+ pci_set_word(pcie_cap + PCI_EXP_FLAGS,
+ pci_get_word(pcie_cap + PCI_EXP_FLAGS) | PCI_EXP_FLAGS_SLOT);
+
+ tmp = pci_get_long(pcie_cap + PCI_EXP_SLTCAP);
+ tmp &= PCI_EXP_SLTCAP_PSN;
+ tmp |=
+ (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_set_long(pcie_cap + PCI_EXP_SLTCAP, tmp);
+
+ tmp = pci_get_word(pcie_cap + PCI_EXP_SLTCTL);
+ tmp &= ~(PCI_EXP_SLTCTL_PIC | PCI_EXP_SLTCTL_AIC);
+ tmp |= PCI_EXP_SLTCTL_PIC_OFF | PCI_EXP_SLTCTL_AIC_OFF;
+ pci_set_word(pcie_cap + PCI_EXP_SLTCTL, tmp);
+ pci_set_word(pcie_wmask + PCI_EXP_SLTCTL,
+ pci_get_word(pcie_wmask + 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);
+
+ pci_set_word(pcie_w1cmask + PCI_EXP_SLTSTA,
+ pci_get_word(pcie_w1cmask + PCI_EXP_SLTSTA) |
+ PCI_EXP_HP_EV_SUPPORTED);
+
+ 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 *pcie_cap = dev->config + pci_pcie_cap(dev);
+ uint32_t tmp;
+
+ PCIE_DEV_PRINTF(dev, "reset\n");
+
+ tmp = pci_get_word(pcie_cap + PCI_EXP_SLTCTL);
+ tmp &= ~(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);
+ tmp |= PCI_EXP_SLTCTL_PIC_OFF | PCI_EXP_SLTCTL_AIC_OFF;
+ pci_set_word(pcie_cap + PCI_EXP_SLTCTL, tmp);
+
+ tmp = pci_get_word(pcie_cap + PCI_EXP_SLTSTA);
+ tmp &= ~(PCI_EXP_SLTSTA_EIS | /* by reset, the lock is released */
+ PCI_EXP_SLTSTA_CC |
+ PCI_EXP_SLTSTA_PDC |
+ PCI_EXP_SLTSTA_ABP);
+ pci_set_word(pcie_cap + PCI_EXP_SLTSTA, tmp);
+}
+
+void pcie_cap_slot_write_config(PCIDevice *dev,
+ uint32_t addr, uint32_t val, int len,
+ uint16_t sltctl_prev)
+{
+ uint32_t pos = pci_pcie_cap(dev);
+ uint8_t *pcie_cap = dev->config + pos;
+ uint16_t sltctl = pci_get_word(pcie_cap + PCI_EXP_SLTCTL);
+ uint16_t sltsta = pci_get_word(pcie_cap + PCI_EXP_SLTSTA);
+
+ PCIE_DEV_PRINTF(dev,
+ "addr: 0x%x val: 0x%x len: %d\n"
+ "\tsltctl_prev: 0x%02x sltctl: 0x%02x sltsta 0x%02x\n",
+ addr, val, len, sltctl_prev, sltctl, sltsta);
+ /* SLTSTA: process SLTSTA before SLTCTL to avoid spurious interrupt */
+ if (ranges_overlap(addr, len, pos + PCI_EXP_SLTSTA, 2)) {
+ sltsta = pci_get_word(pcie_cap + PCI_EXP_SLTSTA);
+
+ /* write to stlsta results in clearing bits,
+ so new interrupts won't be generated. */
+ PCIE_DEV_PRINTF(dev, "sltsta -> 0x%02x\n", sltsta);
+ }
+
+ /* SLTCTL */
+ if (ranges_overlap(addr, len, pos + PCI_EXP_SLTCTL, 2)) {
+ PCIE_DEV_PRINTF(dev, "sltctl: 0x%02x -> 0x%02x\n",
+ sltctl_prev, sltctl);
+ if (pci_shift_word(addr, val, pos + PCI_EXP_SLTCTL) &
+ PCI_EXP_SLTCTL_EIC) {
+ /* toggle PCI_EXP_SLTSTA_EIS */
+ sltsta = (sltsta & ~PCI_EXP_SLTSTA_EIS) |
+ ((sltsta ^ PCI_EXP_SLTSTA_EIS) & PCI_EXP_SLTSTA_EIS);
+ pci_set_word(pcie_cap + PCI_EXP_SLTSTA, sltsta);
+ PCIE_DEV_PRINTF(dev, "PCI_EXP_SLTCTL_EIC: sltsta -> 0x%02x\n",
+ sltsta);
+ }
+
+ if (sltctl & PCI_EXP_SLTCTL_HPIE) {
+ bool trigger;
+ int level;
+
+ if (((sltctl_prev ^ sltctl) & sltctl) & PCI_EXP_HP_EV_SUPPORTED) {
+ /* 0 -> 1 */
+ trigger = true;
+ } else {
+ trigger = false;
+ }
+ if ((sltctl & sltsta) & PCI_EXP_HP_EV_SUPPORTED) {
+ level = 1;
+ } else {
+ level = 0;
+ }
+ pcie_notify(dev, pcie_cap_flags_get_vector(dev), trigger, level);
+ }
+
+ if (!((sltctl_prev ^ sltctl) & PCI_EXP_SLTCTL_SUPPORTED)) {
+ PCIE_DEV_PRINTF(dev,
+ "sprious command completion slctl 0x%x -> 0x%x\n",
+ sltctl_prev, sltctl);
+ }
+
+ /* command completion.
+ * 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.
+ */
+ /* set command completed bit */
+ pcie_cap_slot_event(dev, PCI_EXP_HP_EV_CCI, 0);
+ }
+}
+
+void pcie_cap_slot_push_attention_button(PCIDevice *dev)
+{
+ pcie_cap_slot_event(dev, PCI_EXP_HP_EV_ABP, 0);
+}
+
+/* root control/capabilities/status. PME isn't emulated for now */
+void pcie_cap_root_init(PCIDevice *dev)
+{
+ uint8_t pos = pci_pcie_cap(dev);
+ pci_set_word(dev->wmask + pos + PCI_EXP_RTCTL,
+ PCI_EXP_RTCTL_SECEE | PCI_EXP_RTCTL_SENFEE |
+ PCI_EXP_RTCTL_SEFEE);
+}
+
+void pcie_cap_root_reset(PCIDevice *dev)
+{
+ uint8_t *pcie_cap = dev->config + pci_pcie_cap(dev);
+ pci_set_word(pcie_cap + PCI_EXP_RTCTL, 0);
+}
+
+/* function level reset(FLR) */
+void pcie_cap_flr_init(PCIDevice *dev, pcie_flr_fn flr)
+{
+ uint8_t *pcie_cap = dev->config + pci_pcie_cap(dev);
+ pci_set_word(pcie_cap + PCI_EXP_DEVCAP,
+ pci_get_word(pcie_cap + PCI_EXP_DEVCAP) | PCI_EXP_DEVCAP_FLR);
+ dev->exp.flr = flr;
+}
+
+void pcie_cap_flr_write_config(PCIDevice *dev,
+ uint32_t addr, uint32_t val, int len)
+{
+ uint32_t pos = pci_pcie_cap(dev);
+ if (ranges_overlap(addr, len, pos + PCI_EXP_DEVCTL, 2)) {
+ uint16_t val16 = pci_shift_word(addr, val, pos + PCI_EXP_DEVCTL);
+ if ((val16 & PCI_EXP_DEVCTL_BCR_FLR) && dev->exp.flr) {
+ dev->exp.flr(dev);
+ }
+ }
+}
+
+/* Alternative Routing-ID Interpretation (ARI) */
+/* ari forwarding support for down stream port */
+void pcie_cap_ari_init(PCIDevice *dev)
+{
+ uint8_t *pcie_cap = dev->config + pci_pcie_cap(dev);
+ uint8_t *pcie_wmask = dev->wmask + pci_pcie_cap(dev);
+
+ pci_set_long(pcie_cap + PCI_EXP_DEVCAP2,
+ pci_get_long(pcie_cap + PCI_EXP_DEVCAP2) |
+ PCI_EXP_DEVCAP2_ARI);
+
+ pci_set_long(pcie_wmask + PCI_EXP_DEVCTL2,
+ pci_get_long(pcie_wmask + PCI_EXP_DEVCTL2) |
+ PCI_EXP_DEVCTL2_ARI);
+}
+
+void pcie_cap_ari_reset(PCIDevice *dev)
+{
+ uint8_t *pcie_cap = dev->config + pci_pcie_cap(dev);
+
+ pci_set_long(pcie_cap + PCI_EXP_DEVCTL2,
+ pci_get_long(pcie_cap + PCI_EXP_DEVCTL2) &
+ ~PCI_EXP_DEVCTL2_ARI);
+}
+
+bool pcie_cap_is_ari_enabled(const PCIDevice *dev)
+{
+ if (!pci_is_express(dev)) {
+ return false;
+ }
+ if (!pci_pcie_cap(dev)) {
+ return false;
+ }
+
+ return pci_get_long(dev->config + pci_pcie_cap(dev) + 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
+ */
+
+#define PCI_EXT_CAP_NO_ID ((uint16_t)0) /* 0 is reserved cap id.
+ * use internally to find the
+ * last capability in the
+ * linked list
+ */
+
+static uint16_t pcie_find_capability_list(PCIDevice *dev, uint16_t cap_id,
+ uint16_t *prev_p)
+{
+ uint16_t prev = 0;
+ uint16_t next = PCI_CONFIG_SPACE_SIZE;
+ uint32_t header = pci_get_long(dev->config + next);
+
+ if (!header) {
+ /* no extended capability */
+ next = 0;
+ goto out;
+ }
+
+ while (next) {
+ 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;
+ }
+ prev = next;
+ next = PCI_EXT_CAP_NEXT(header);
+ }
+
+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;
+ next = pcie_find_capability_list(dev, PCI_EXT_CAP_NO_ID, &prev);
+ 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);
+ /* Check capability by default */
+ memset(dev->cmask + offset, 0xFF, size);
+}
+
+void pcie_del_capability(PCIDevice *dev, uint16_t cap_id, uint16_t size)
+{
+ uint16_t prev;
+ uint16_t offset = pcie_find_capability_list(dev, cap_id, &prev);
+ uint32_t header;
+
+ assert(offset >= PCI_CONFIG_SPACE_SIZE);
+ header = pci_get_long(dev->config + offset);
+ if (prev) {
+ pcie_ext_cap_set_next(dev, prev, PCI_EXT_CAP_NEXT(header));
+ } else {
+ /* move up next ext cap to PCI_CONFIG_SPACE_SIZE? */
+ assert(offset == PCI_CONFIG_SPACE_SIZE);
+ pci_set_long(dev->config + offset,
+ PCI_EXT_CAP(0, 0, PCI_EXT_CAP_NEXT(header)));
+ }
+
+ /* Make those registers read-only reserved zero */
+ memset(dev->config + offset, 0, size);
+ memset(dev->wmask + offset, 0, size);
+ /* Clear cmask as device-specific registers can't be checked */
+ memset(dev->cmask + offset, 0, 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));
+}
diff --git a/hw/pcie.h b/hw/pcie.h
new file mode 100644
index 0000000..37713dc
--- /dev/null
+++ b/hw/pcie.h
@@ -0,0 +1,96 @@
+/*
+ * pcie.h
+ *
+ * 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/>.
+ */
+
+#ifndef QEMU_PCIE_H
+#define QEMU_PCIE_H
+
+#include "hw.h"
+#include "pcie_regs.h"
+
+enum PCIExpressIndicator {
+ /* for attention and power indicator */
+ PCI_EXP_HP_IND_RESERVED = PCI_EXP_SLTCTL_IND_RESERVED,
+ PCI_EXP_HP_IND_ON = PCI_EXP_SLTCTL_IND_ON,
+ PCI_EXP_HP_IND_BLINK = PCI_EXP_SLTCTL_IND_BLINK,
+ PCI_EXP_HP_IND_OFF = PCI_EXP_SLTCTL_IND_OFF,
+};
+
+enum PCIExpressHotPlugEvent {
+ /* the bits match the bits in Slot Control/Status registers.
+ * PCI_EXP_HP_EV_xxx = PCI_EXP_SLTCTL_xxxE = PCI_EXP_SLTSTA_xxx
+ */
+ PCI_EXP_HP_EV_ABP = 0x01, /* attention button preseed */
+ PCI_EXP_HP_EV_PDC = 0x08, /* presence detect changed */
+ PCI_EXP_HP_EV_CCI = 0x10, /* command completed */
+
+ PCI_EXP_HP_EV_SUPPORTED = 0x19, /* supported event mask */
+ /* events not listed aren't supported */
+};
+
+typedef void (*pcie_flr_fn)(PCIDevice *dev);
+
+struct PCIExpressDevice {
+ /* Offset of express capability in config space */
+ uint8_t exp_cap;
+
+ /* FLR */
+ pcie_flr_fn flr;
+};
+
+void pcie_notify(PCIDevice *dev, uint16_t vector, bool trigger, int level);
+
+/* PCI express capability helper functions */
+int pcie_cap_init(PCIDevice *dev, uint8_t offset, uint8_t type, uint8_t port);
+void pcie_cap_exit(PCIDevice *dev);
+uint8_t pcie_cap_get_type(const PCIDevice *dev);
+void pcie_cap_flags_set_vector(PCIDevice *dev, uint8_t vector);
+uint8_t pcie_cap_flags_get_vector(PCIDevice *dev);
+
+void pcie_cap_deverr_init(PCIDevice *dev);
+void pcie_cap_deverr_reset(PCIDevice *dev);
+
+void pcie_cap_slot_init(PCIDevice *dev, uint16_t slot);
+void pcie_cap_slot_reset(PCIDevice *dev);
+void pcie_cap_slot_write_config(PCIDevice *dev,
+ uint32_t addr, uint32_t val, int len,
+ uint16_t sltctl_prev);
+void pcie_cap_slot_push_attention_button(PCIDevice *dev);
+
+void pcie_cap_root_init(PCIDevice *dev);
+void pcie_cap_root_reset(PCIDevice *dev);
+
+void pcie_cap_flr_init(PCIDevice *dev, pcie_flr_fn flr);
+void pcie_cap_flr_write_config(PCIDevice *dev,
+ uint32_t addr, uint32_t val, int len);
+
+void pcie_cap_ari_init(PCIDevice *dev);
+void pcie_cap_ari_reset(PCIDevice *dev);
+bool pcie_cap_is_ari_enabled(const PCIDevice *dev);
+
+/* PCI express extended capability helper functions */
+uint16_t pcie_find_capability(PCIDevice *dev, uint16_t cap_id);
+void pcie_add_capability(PCIDevice *dev,
+ uint16_t cap_id, uint8_t cap_ver,
+ uint16_t offset, uint16_t size);
+void pcie_del_capability(PCIDevice *dev, uint16_t cap_id, uint16_t size);
+
+void pcie_ari_init(PCIDevice *dev, uint16_t offset, uint16_t nextfn);
+
+#endif /* QEMU_PCIE_H */
diff --git a/qemu-common.h b/qemu-common.h
index d735235..6d9ee26 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -219,6 +219,7 @@ typedef struct PCIHostState PCIHostState;
typedef struct PCIExpressHost PCIExpressHost;
typedef struct PCIBus PCIBus;
typedef struct PCIDevice PCIDevice;
+typedef struct PCIExpressDevice PCIExpressDevice;
typedef struct PCIBridge PCIBridge;
typedef struct SerialState SerialState;
typedef struct IRQState *qemu_irq;
--
1.7.1.1
