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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH RFC V1 09/11] Introduce Xen PCI Passthrough, PCI config space helpers (2/3)
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
hw/xen_pci_passthrough_config_init.c | 2489 ++++++++++++++++++++++++++++++++++
1 files changed, 2489 insertions(+), 0 deletions(-)
create mode 100644 hw/xen_pci_passthrough_config_init.c
diff --git a/hw/xen_pci_passthrough_config_init.c
b/hw/xen_pci_passthrough_config_init.c
new file mode 100644
index 0000000..4bf9c15
--- /dev/null
+++ b/hw/xen_pci_passthrough_config_init.c
@@ -0,0 +1,2489 @@
+#include "qemu-timer.h"
+#include "xen_backend.h"
+#include "xen_pci_passthrough.h"
+
+#define PT_MERGE_VALUE(value, data, val_mask) \
+ (((value) & (val_mask)) | ((data) & ~(val_mask)))
+
+/* prototype */
+
+static uint32_t pt_ptr_reg_init(XenPCIPassthroughState *s, XenPTRegInfo *reg,
+ uint32_t real_offset);
+static int pt_init_pci_config(XenPCIPassthroughState *s);
+
+
+/* helper */
+
+/* A return value of 1 means the capability should NOT be exposed to guest. */
+static int pt_hide_dev_cap(const HostPCIDevice *d, uint8_t grp_id)
+{
+ switch (grp_id) {
+ case PCI_CAP_ID_EXP:
+ /* The PCI Express Capability Structure of the VF of Intel 82599 10GbE
+ * Controller looks trivial, e.g., the PCI Express Capabilities
+ * Register is 0. We should not try to expose it to guest.
+ */
+ if (d->vendor_id == PCI_VENDOR_ID_INTEL &&
+ d->device_id == PCI_DEVICE_ID_INTEL_82599_VF) {
+ return 1;
+ }
+ break;
+ }
+ return 0;
+}
+
+/* find emulate register group entry */
+XenPTRegGroup *pt_find_reg_grp(XenPCIPassthroughState *s, uint32_t address)
+{
+ XenPTRegGroup *entry = NULL;
+
+ /* find register group entry */
+ QLIST_FOREACH(entry, &s->reg_grp_tbl, entries) {
+ /* check address */
+ if ((entry->base_offset <= address)
+ && ((entry->base_offset + entry->size) > address)) {
+ return entry;
+ }
+ }
+
+ /* group entry not found */
+ return NULL;
+}
+
+/* find emulate register entry */
+XenPTReg *pt_find_reg(XenPTRegGroup *reg_grp, uint32_t address)
+{
+ XenPTReg *reg_entry = NULL;
+ XenPTRegInfo *reg = NULL;
+ uint32_t real_offset = 0;
+
+ /* find register entry */
+ QLIST_FOREACH(reg_entry, ®_grp->reg_tbl_list, entries) {
+ reg = reg_entry->reg;
+ real_offset = reg_grp->base_offset + reg->offset;
+ /* check address */
+ if ((real_offset <= address)
+ && ((real_offset + reg->size) > address)) {
+ return reg_entry;
+ }
+ }
+
+ return NULL;
+}
+
+/* parse BAR */
+static PTBarFlag pt_bar_reg_parse(XenPCIPassthroughState *s, XenPTRegInfo *reg)
+{
+ PCIDevice *d = &s->dev;
+ XenPTRegion *region = NULL;
+ PCIIORegion *r;
+ int index = 0;
+
+ /* check 64bit BAR */
+ index = pt_bar_offset_to_index(reg->offset);
+ if ((index > 0) && (index < PCI_ROM_SLOT) &&
+ ((s->real_device->base_addr[index - 1]
+ & (PCI_BASE_ADDRESS_SPACE | PCI_BASE_ADDRESS_MEM_TYPE_MASK))
+ == (PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_64)))
+ {
+ region = &s->bases[index - 1];
+ if (region->bar_flag != PT_BAR_FLAG_UPPER) {
+ return PT_BAR_FLAG_UPPER;
+ }
+ }
+
+ /* check unused BAR */
+ r = &d->io_regions[index];
+ if (r->size == 0) {
+ return PT_BAR_FLAG_UNUSED;
+ }
+
+ /* for ExpROM BAR */
+ if (index == PCI_ROM_SLOT) {
+ return PT_BAR_FLAG_MEM;
+ }
+
+ /* check BAR I/O indicator */
+ if (s->real_device->base_addr[index] & PCI_BASE_ADDRESS_SPACE_IO) {
+ return PT_BAR_FLAG_IO;
+ } else {
+ return PT_BAR_FLAG_MEM;
+ }
+}
+
+
+/****************
+ * general register functions
+ */
+
+/* register initialization function */
+
+static uint32_t pt_common_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ return reg->init_val;
+}
+
+/* Read register functions */
+
+static int pt_byte_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint8_t *value, uint8_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint8_t valid_emu_mask = 0;
+
+ /* emulate byte register */
+ valid_emu_mask = reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
+
+ return 0;
+}
+static int pt_word_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t valid_emu_mask = 0;
+
+ /* emulate word register */
+ valid_emu_mask = reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
+
+ return 0;
+}
+static int pt_long_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t *value, uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t valid_emu_mask = 0;
+
+ /* emulate long register */
+ valid_emu_mask = reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
+
+ return 0;
+}
+
+/* Write register functions */
+
+static int pt_byte_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint8_t *value, uint8_t dev_value,
+ uint8_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint8_t writable_mask = 0;
+ uint8_t throughable_mask = 0;
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ return 0;
+}
+static int pt_word_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t dev_value,
+ uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ return 0;
+}
+static int pt_long_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t *value, uint32_t dev_value,
+ uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t writable_mask = 0;
+ uint32_t throughable_mask = 0;
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ return 0;
+}
+
+/* common restore register fonctions */
+static int pt_byte_reg_restore(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t real_offset, uint8_t dev_value,
+ uint8_t *value)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ PCIDevice *d = &s->dev;
+
+ /* use I/O device register's value as restore value */
+ *value = pci_get_byte(d->config + real_offset);
+
+ /* create value for restoring to I/O device register */
+ *value = PT_MERGE_VALUE(*value, dev_value, reg->emu_mask);
+
+ return 0;
+}
+static int pt_word_reg_restore(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t real_offset, uint16_t dev_value,
+ uint16_t *value)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ PCIDevice *d = &s->dev;
+
+ /* use I/O device register's value as restore value */
+ *value = pci_get_word(d->config + real_offset);
+
+ /* create value for restoring to I/O device register */
+ *value = PT_MERGE_VALUE(*value, dev_value, reg->emu_mask);
+
+ return 0;
+}
+
+
+/* XenPTRegInfo declaration
+ * - only for emulated register (either a part or whole bit).
+ * - for passthrough register that need special behavior (like interacting with
+ * other component), set emu_mask to all 0 and specify r/w func properly.
+ * - do NOT use ALL F for init_val, otherwise the tbl will not be registered.
+ */
+
+/********************
+ * Header Type0
+ */
+
+static uint32_t pt_vendor_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ return s->real_device->vendor_id;
+}
+static uint32_t pt_device_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ return s->real_device->device_id;
+}
+static uint32_t pt_status_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ XenPTRegGroup *reg_grp_entry = NULL;
+ XenPTReg *reg_entry = NULL;
+ int reg_field = 0;
+
+ /* find Header register group */
+ reg_grp_entry = pt_find_reg_grp(s, PCI_CAPABILITY_LIST);
+ if (reg_grp_entry) {
+ /* find Capabilities Pointer register */
+ reg_entry = pt_find_reg(reg_grp_entry, PCI_CAPABILITY_LIST);
+ if (reg_entry) {
+ /* check Capabilities Pointer register */
+ if (reg_entry->data) {
+ reg_field |= PCI_STATUS_CAP_LIST;
+ } else {
+ reg_field &= ~PCI_STATUS_CAP_LIST;
+ }
+ } else {
+ hw_error("Internal error: Couldn't find pt_reg_tbl for "
+ "Capabilities Pointer register. I/O emulator exit.\n");
+ }
+ } else {
+ hw_error("Internal error: Couldn't find pt_reg_grp_tbl for Header. "
+ "I/O emulator exit.\n");
+ }
+
+ return reg_field;
+}
+static uint32_t pt_header_type_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg,
+ uint32_t real_offset)
+{
+ /* read PCI_HEADER_TYPE */
+ return reg->init_val | 0x80;
+}
+
+/* initialize Interrupt Pin register */
+static uint32_t pt_irqpin_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ return pci_read_intx(s);
+}
+
+/* Command register */
+static int pt_cmd_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t valid_emu_mask = 0;
+ uint16_t emu_mask = reg->emu_mask;
+
+ if (s->is_virtfn) {
+ emu_mask |= PCI_COMMAND_MEMORY;
+ }
+
+ /* emulate word register */
+ valid_emu_mask = emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
+
+ return 0;
+}
+static int pt_cmd_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t dev_value,
+ uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+ uint16_t wr_value = *value;
+ uint16_t emu_mask = reg->emu_mask;
+
+ if (s->is_virtfn) {
+ emu_mask |= PCI_COMMAND_MEMORY;
+ }
+
+ /* modify emulate register */
+ writable_mask = ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~emu_mask & valid_mask;
+
+ if (*value & PCI_COMMAND_INTX_DISABLE) {
+ if (s->msi_trans_en) {
+ msi_set_enable(s, 0);
+ } else {
+ throughable_mask |= PCI_COMMAND_INTX_DISABLE;
+ }
+ } else {
+ if (s->msi_trans_en) {
+ msi_set_enable(s, 1);
+ } else {
+ if (s->machine_irq) {
+ throughable_mask |= PCI_COMMAND_INTX_DISABLE;
+ }
+ }
+ }
+
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* mapping BAR */
+ pt_bar_mapping(s, wr_value & PCI_COMMAND_IO,
+ wr_value & PCI_COMMAND_MEMORY);
+
+ return 0;
+}
+static int pt_cmd_reg_restore(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t real_offset, uint16_t dev_value,
+ uint16_t *value)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ PCIDevice *d = &s->dev;
+ uint16_t restorable_mask = 0;
+
+ /* use I/O device register's value as restore value */
+ *value = pci_get_word(d->config + real_offset);
+
+ /* create value for restoring to I/O device register
+ * but do not include Fast Back-to-Back Enable bit.
+ */
+ restorable_mask = reg->emu_mask & ~PCI_COMMAND_FAST_BACK;
+ *value = PT_MERGE_VALUE(*value, dev_value, restorable_mask);
+
+ if (!s->machine_irq) {
+ *value |= PCI_COMMAND_INTX_DISABLE;
+ } else {
+ *value &= ~PCI_COMMAND_INTX_DISABLE;
+ }
+
+ return 0;
+}
+
+/* BAR */
+static uint32_t pt_bar_reg_init(XenPCIPassthroughState *s, XenPTRegInfo *reg,
+ uint32_t real_offset)
+{
+ int reg_field = 0;
+ int index;
+
+ /* get BAR index */
+ index = pt_bar_offset_to_index(reg->offset);
+ if (index < 0) {
+ hw_error("Internal error: Invalid BAR index[%d]. "
+ "I/O emulator exit.\n", index);
+ }
+
+ /* set initial guest physical base address to -1 */
+ s->bases[index].e_physbase = -1;
+
+ /* set BAR flag */
+ s->bases[index].bar_flag = pt_bar_reg_parse(s, reg);
+ if (s->bases[index].bar_flag == PT_BAR_FLAG_UNUSED) {
+ reg_field = PT_INVALID_REG;
+ }
+
+ return reg_field;
+}
+static int pt_bar_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t *value, uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t valid_emu_mask = 0;
+ uint32_t bar_emu_mask = 0;
+ int index;
+
+ /* get BAR index */
+ index = pt_bar_offset_to_index(reg->offset);
+ if (index < 0) {
+ hw_error("Internal error: Invalid BAR index[%d]. "
+ "I/O emulator exit.\n", index);
+ }
+
+ /* use fixed-up value from kernel sysfs */
+ *value = s->real_device->base_addr[index];
+
+ /* set emulate mask depend on BAR flag */
+ switch (s->bases[index].bar_flag)
+ {
+ case PT_BAR_FLAG_MEM:
+ bar_emu_mask = PT_BAR_MEM_EMU_MASK;
+ break;
+ case PT_BAR_FLAG_IO:
+ bar_emu_mask = PT_BAR_IO_EMU_MASK;
+ break;
+ case PT_BAR_FLAG_UPPER:
+ bar_emu_mask = PT_BAR_ALLF;
+ break;
+ default:
+ break;
+ }
+
+ /* emulate BAR */
+ valid_emu_mask = bar_emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
+
+ return 0;
+}
+static int pt_bar_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t *value, uint32_t dev_value,
+ uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ XenPTRegGroup *reg_grp_entry = NULL;
+ XenPTReg *reg_entry = NULL;
+ XenPTRegion *base = NULL;
+ PCIDevice *d = &s->dev;
+ PCIIORegion *r;
+ uint32_t writable_mask = 0;
+ uint32_t throughable_mask = 0;
+ uint32_t bar_emu_mask = 0;
+ uint32_t bar_ro_mask = 0;
+ uint32_t new_addr, last_addr;
+ uint32_t prev_offset;
+ uint32_t r_size = 0;
+ int index = 0;
+
+ /* get BAR index */
+ index = pt_bar_offset_to_index(reg->offset);
+ if (index < 0) {
+ hw_error("Internal error: Invalid BAR index[%d]. "
+ "I/O emulator exit.\n", index);
+ }
+
+ r = &d->io_regions[index];
+ base = &s->bases[index];
+ r_size = pt_get_emul_size(base->bar_flag, r->size);
+
+ /* set emulate mask and read-only mask depend on BAR flag */
+ switch (s->bases[index].bar_flag)
+ {
+ case PT_BAR_FLAG_MEM:
+ bar_emu_mask = PT_BAR_MEM_EMU_MASK;
+ bar_ro_mask = PT_BAR_MEM_RO_MASK | (r_size - 1);
+ break;
+ case PT_BAR_FLAG_IO:
+ bar_emu_mask = PT_BAR_IO_EMU_MASK;
+ bar_ro_mask = PT_BAR_IO_RO_MASK | (r_size - 1);
+ break;
+ case PT_BAR_FLAG_UPPER:
+ bar_emu_mask = PT_BAR_ALLF;
+ bar_ro_mask = 0; /* all upper 32bit are R/W */
+ break;
+ default:
+ break;
+ }
+
+ /* modify emulate register */
+ writable_mask = bar_emu_mask & ~bar_ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+
+ /* check whether we need to update the virtual region address or not */
+ switch (s->bases[index].bar_flag)
+ {
+ case PT_BAR_FLAG_MEM:
+ /* nothing to do */
+ break;
+ case PT_BAR_FLAG_IO:
+ new_addr = cfg_entry->data;
+ last_addr = new_addr + r_size - 1;
+ /* check invalid address */
+ if (last_addr <= new_addr || !new_addr || last_addr >= 0x10000) {
+ /* check 64K range */
+ if ((last_addr >= 0x10000) &&
+ (cfg_entry->data != (PT_BAR_ALLF & ~bar_ro_mask))) {
+ PT_LOG("Warning: Guest attempt to set Base Address "
+ "over the 64KB. [%02x:%02x.%x][Offset:%02xh]"
+ "[Address:%08xh][Size:%08xh]\n",
+ pci_bus_num(d->bus), PCI_SLOT(d->devfn),
+ PCI_FUNC(d->devfn),
+ reg->offset, new_addr, r_size);
+ }
+ /* just remove mapping */
+ r->addr = -1;
+ goto exit;
+ }
+ break;
+ case PT_BAR_FLAG_UPPER:
+ if (cfg_entry->data) {
+ if (cfg_entry->data != (PT_BAR_ALLF & ~bar_ro_mask)) {
+ PT_LOG("Warning: Guest attempt to set high MMIO Base Address. "
+ "Ignore mapping. "
+ "[%02x:%02x.%x][Offset:%02xh][High Address:%08xh]\n",
+ pci_bus_num(d->bus), PCI_SLOT(d->devfn),
+ PCI_FUNC(d->devfn), reg->offset, cfg_entry->data);
+ }
+ /* clear lower address */
+ d->io_regions[index-1].addr = -1;
+ } else {
+ /* find lower 32bit BAR */
+ prev_offset = (reg->offset - 4);
+ reg_grp_entry = pt_find_reg_grp(s, prev_offset);
+ if (reg_grp_entry) {
+ reg_entry = pt_find_reg(reg_grp_entry, prev_offset);
+ if (reg_entry) {
+ /* restore lower address */
+ d->io_regions[index-1].addr = reg_entry->data;
+ } else {
+ return -1;
+ }
+ } else {
+ return -1;
+ }
+ }
+
+ /* never mapping the 'empty' upper region,
+ * because we'll do it enough for the lower region.
+ */
+ r->addr = -1;
+ goto exit;
+ default:
+ break;
+ }
+
+ /* update the corresponding virtual region address */
+ /*
+ * When guest code tries to get block size of mmio, it will write all "1"s
+ * into pci bar register. In this case, cfg_entry->data == writable_mask.
+ * Especially for devices with large mmio, the value of writable_mask
+ * is likely to be a guest physical address that has been mapped to ram
+ * rather than mmio. Remapping this value to mmio should be prevented.
+ */
+
+ if (cfg_entry->data != writable_mask) {
+ r->addr = cfg_entry->data;
+ }
+
+exit:
+ /* create value for writing to I/O device register */
+ throughable_mask = ~bar_emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* After BAR reg update, we need to remap BAR */
+ reg_grp_entry = pt_find_reg_grp(s, PCI_COMMAND);
+ if (reg_grp_entry) {
+ reg_entry = pt_find_reg(reg_grp_entry, PCI_COMMAND);
+ if (reg_entry) {
+ pt_bar_mapping_one(s, index, reg_entry->data & PCI_COMMAND_IO,
+ reg_entry->data & PCI_COMMAND_MEMORY);
+ }
+ }
+
+ return 0;
+}
+static int pt_bar_reg_restore(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t real_offset, uint32_t dev_value,
+ uint32_t *value)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t bar_emu_mask = 0;
+ int index = 0;
+
+ /* get BAR index */
+ index = pt_bar_offset_to_index(reg->offset);
+ if (index < 0) {
+ hw_error("Internal error: Invalid BAR index[%d]. "
+ "I/O emulator exit.\n", index);
+ }
+
+ /* use value from kernel sysfs */
+ if (s->bases[index].bar_flag == PT_BAR_FLAG_UPPER) {
+ *value = s->real_device->base_addr[index-1]; // >> 32;
+ } else {
+ *value = s->real_device->base_addr[index];
+ }
+
+ /* set emulate mask depend on BAR flag */
+ switch (s->bases[index].bar_flag)
+ {
+ case PT_BAR_FLAG_MEM:
+ bar_emu_mask = PT_BAR_MEM_EMU_MASK;
+ break;
+ case PT_BAR_FLAG_IO:
+ bar_emu_mask = PT_BAR_IO_EMU_MASK;
+ break;
+ case PT_BAR_FLAG_UPPER:
+ bar_emu_mask = PT_BAR_ALLF;
+ break;
+ default:
+ break;
+ }
+
+ /* create value for restoring to I/O device register */
+ *value = PT_MERGE_VALUE(*value, dev_value, bar_emu_mask);
+
+ return 0;
+}
+
+/* write Exp ROM BAR */
+static int pt_exp_rom_bar_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint32_t *value,
+ uint32_t dev_value, uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ XenPTRegGroup *reg_grp_entry = NULL;
+ XenPTReg *reg_entry = NULL;
+ XenPTRegion *base = NULL;
+ PCIDevice *d = (PCIDevice *)&s->dev;
+ PCIIORegion *r;
+ uint32_t writable_mask = 0;
+ uint32_t throughable_mask = 0;
+ pcibus_t r_size = 0;
+ uint32_t bar_emu_mask = 0;
+ uint32_t bar_ro_mask = 0;
+
+ r = &d->io_regions[PCI_ROM_SLOT];
+ r_size = r->size;
+ base = &s->bases[PCI_ROM_SLOT];
+ /* align memory type resource size */
+ pt_get_emul_size(base->bar_flag, r_size);
+
+ /* set emulate mask and read-only mask */
+ bar_emu_mask = reg->emu_mask;
+ bar_ro_mask = (reg->ro_mask | (r_size - 1)) & ~PCI_ROM_ADDRESS_ENABLE;
+
+ /* modify emulate register */
+ writable_mask = ~bar_ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+
+ /* update the corresponding virtual region address */
+ /*
+ * When guest code tries to get block size of mmio, it will write all "1"s
+ * into pci bar register. In this case, cfg_entry->data == writable_mask.
+ * Especially for devices with large mmio, the value of writable_mask
+ * is likely to be a guest physical address that has been mapped to ram
+ * rather than mmio. Remapping this value to mmio should be prevented.
+ */
+
+ if (cfg_entry->data != writable_mask) {
+ r->addr = cfg_entry->data;
+ }
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~bar_emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* After BAR reg update, we need to remap BAR*/
+ reg_grp_entry = pt_find_reg_grp(s, PCI_COMMAND);
+ if (reg_grp_entry) {
+ reg_entry = pt_find_reg(reg_grp_entry, PCI_COMMAND);
+ if (reg_entry) {
+ pt_bar_mapping_one(s, PCI_ROM_SLOT,
+ reg_entry->data & PCI_COMMAND_IO,
+ reg_entry->data & PCI_COMMAND_MEMORY);
+ }
+ }
+
+ return 0;
+}
+/* restore ROM BAR */
+static int pt_exp_rom_bar_reg_restore(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry,
+ uint32_t real_offset,
+ uint32_t dev_value, uint32_t *value)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+
+ /* use value from kernel sysfs */
+ *value =
+ PT_MERGE_VALUE(host_pci_read_long(s->real_device, PCI_ROM_ADDRESS),
+ dev_value, reg->emu_mask);
+ return 0;
+}
+
+/* Header Type0 reg static infomation table */
+static XenPTRegInfo pt_emu_reg_header0_tbl[] = {
+ /* Vendor ID reg */
+ {
+ .offset = PCI_VENDOR_ID,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFFFF,
+ .emu_mask = 0xFFFF,
+ .init = pt_vendor_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_word_reg_write,
+ .u.w.restore = NULL,
+ },
+ /* Device ID reg */
+ {
+ .offset = PCI_DEVICE_ID,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFFFF,
+ .emu_mask = 0xFFFF,
+ .init = pt_device_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_word_reg_write,
+ .u.w.restore = NULL,
+ },
+ /* Command reg */
+ {
+ .offset = PCI_COMMAND,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xF880,
+ .emu_mask = 0x0740,
+ .init = pt_common_reg_init,
+ .u.w.read = pt_cmd_reg_read,
+ .u.w.write = pt_cmd_reg_write,
+ .u.w.restore = pt_cmd_reg_restore,
+ },
+ /* Capabilities Pointer reg */
+ {
+ .offset = PCI_CAPABILITY_LIST,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = pt_ptr_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = NULL,
+ },
+ /* Status reg */
+ /* use emulated Cap Ptr value to initialize,
+ * so need to be declared after Cap Ptr reg
+ */
+ {
+ .offset = PCI_STATUS,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0x06FF,
+ .emu_mask = 0x0010,
+ .init = pt_status_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_word_reg_write,
+ .u.w.restore = NULL,
+ },
+ /* Cache Line Size reg */
+ {
+ .offset = PCI_CACHE_LINE_SIZE,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0x00,
+ .emu_mask = 0xFF,
+ .init = pt_common_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = pt_byte_reg_restore,
+ },
+ /* Latency Timer reg */
+ {
+ .offset = PCI_LATENCY_TIMER,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0x00,
+ .emu_mask = 0xFF,
+ .init = pt_common_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = pt_byte_reg_restore,
+ },
+ /* Header Type reg */
+ {
+ .offset = PCI_HEADER_TYPE,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0x00,
+ .init = pt_header_type_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = NULL,
+ },
+ /* Interrupt Line reg */
+ {
+ .offset = PCI_INTERRUPT_LINE,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0x00,
+ .emu_mask = 0xFF,
+ .init = pt_common_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = NULL,
+ },
+ /* Interrupt Pin reg */
+ {
+ .offset = PCI_INTERRUPT_PIN,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = pt_irqpin_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = NULL,
+ },
+ /* BAR 0 reg */
+ /* mask of BAR need to be decided later, depends on IO/MEM type */
+ {
+ .offset = PCI_BASE_ADDRESS_0,
+ .size = 4,
+ .init_val = 0x00000000,
+ .init = pt_bar_reg_init,
+ .u.dw.read = pt_bar_reg_read,
+ .u.dw.write = pt_bar_reg_write,
+ .u.dw.restore = pt_bar_reg_restore,
+ },
+ /* BAR 1 reg */
+ {
+ .offset = PCI_BASE_ADDRESS_1,
+ .size = 4,
+ .init_val = 0x00000000,
+ .init = pt_bar_reg_init,
+ .u.dw.read = pt_bar_reg_read,
+ .u.dw.write = pt_bar_reg_write,
+ .u.dw.restore = pt_bar_reg_restore,
+ },
+ /* BAR 2 reg */
+ {
+ .offset = PCI_BASE_ADDRESS_2,
+ .size = 4,
+ .init_val = 0x00000000,
+ .init = pt_bar_reg_init,
+ .u.dw.read = pt_bar_reg_read,
+ .u.dw.write = pt_bar_reg_write,
+ .u.dw.restore = pt_bar_reg_restore,
+ },
+ /* BAR 3 reg */
+ {
+ .offset = PCI_BASE_ADDRESS_3,
+ .size = 4,
+ .init_val = 0x00000000,
+ .init = pt_bar_reg_init,
+ .u.dw.read = pt_bar_reg_read,
+ .u.dw.write = pt_bar_reg_write,
+ .u.dw.restore = pt_bar_reg_restore,
+ },
+ /* BAR 4 reg */
+ {
+ .offset = PCI_BASE_ADDRESS_4,
+ .size = 4,
+ .init_val = 0x00000000,
+ .init = pt_bar_reg_init,
+ .u.dw.read = pt_bar_reg_read,
+ .u.dw.write = pt_bar_reg_write,
+ .u.dw.restore = pt_bar_reg_restore,
+ },
+ /* BAR 5 reg */
+ {
+ .offset = PCI_BASE_ADDRESS_5,
+ .size = 4,
+ .init_val = 0x00000000,
+ .init = pt_bar_reg_init,
+ .u.dw.read = pt_bar_reg_read,
+ .u.dw.write = pt_bar_reg_write,
+ .u.dw.restore = pt_bar_reg_restore,
+ },
+ /* Expansion ROM BAR reg */
+ {
+ .offset = PCI_ROM_ADDRESS,
+ .size = 4,
+ .init_val = 0x00000000,
+ .ro_mask = 0x000007FE,
+ .emu_mask = 0xFFFFF800,
+ .init = pt_bar_reg_init,
+ .u.dw.read = pt_long_reg_read,
+ .u.dw.write = pt_exp_rom_bar_reg_write,
+ .u.dw.restore = pt_exp_rom_bar_reg_restore,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/*********************************
+ * Vital Product Data Capability
+ */
+
+/* Vital Product Data Capability Structure reg static infomation table */
+static XenPTRegInfo pt_emu_reg_vpd_tbl[] = {
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = pt_ptr_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = NULL,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/**************************************
+ * Vendor Specific Capability
+ */
+
+/* Vendor Specific Capability Structure reg static infomation table */
+static XenPTRegInfo pt_emu_reg_vendor_tbl[] = {
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = pt_ptr_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = NULL,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/*****************************
+ * PCI Express Capability
+ */
+
+/* initialize Link Control register */
+static uint32_t pt_linkctrl_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ uint8_t cap_ver = 0;
+ uint8_t dev_type = 0;
+
+ /* TODO maybe better to use fonction from hw/pcie.c */
+ cap_ver = pci_get_byte(s->dev.config + real_offset - reg->offset
+ + PCI_EXP_FLAGS)
+ & PCI_EXP_FLAGS_VERS;
+ dev_type = (pci_get_byte(s->dev.config + real_offset - reg->offset
+ + PCI_EXP_FLAGS)
+ & PCI_EXP_FLAGS_TYPE) >> 4;
+
+ /* no need to initialize in case of Root Complex Integrated Endpoint
+ * with cap_ver 1.x
+ */
+ if ((dev_type == PCI_EXP_TYPE_RC_END) && (cap_ver == 1)) {
+ return PT_INVALID_REG;
+ }
+
+ return reg->init_val;
+}
+/* initialize Device Control 2 register */
+static uint32_t pt_devctrl2_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ uint8_t cap_ver = 0;
+
+ cap_ver = pci_get_byte(s->dev.config + real_offset - reg->offset
+ + PCI_EXP_FLAGS)
+ & PCI_EXP_FLAGS_VERS;
+
+ /* no need to initialize in case of cap_ver 1.x */
+ if (cap_ver == 1) {
+ return PT_INVALID_REG;
+ }
+
+ return reg->init_val;
+}
+/* initialize Link Control 2 register */
+static uint32_t pt_linkctrl2_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ int reg_field = 0;
+ uint8_t cap_ver = 0;
+
+ cap_ver = pci_get_byte(s->dev.config + real_offset - reg->offset
+ + PCI_EXP_FLAGS)
+ & PCI_EXP_FLAGS_VERS;
+
+ /* no need to initialize in case of cap_ver 1.x */
+ if (cap_ver == 1) {
+ return PT_INVALID_REG;
+ }
+
+ /* set Supported Link Speed */
+ reg_field |= PCI_EXP_LNKCAP_SLS &
+ pci_get_byte(s->dev.config + real_offset - reg->offset
+ + PCI_EXP_LNKCAP);
+
+ return reg_field;
+}
+
+/* PCI Express Capability Structure reg static infomation table */
+static XenPTRegInfo pt_emu_reg_pcie_tbl[] = {
+ /* Next Pointer reg */
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = pt_ptr_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = NULL,
+ },
+ /* Device Capabilities reg */
+ {
+ .offset = PCI_EXP_DEVCAP,
+ .size = 4,
+ .init_val = 0x00000000,
+ .ro_mask = 0x1FFCFFFF,
+ .emu_mask = 0x10000000,
+ .init = pt_common_reg_init,
+ .u.dw.read = pt_long_reg_read,
+ .u.dw.write = pt_long_reg_write,
+ .u.dw.restore = NULL,
+ },
+ /* Device Control reg */
+ {
+ .offset = PCI_EXP_DEVCTL,
+ .size = 2,
+ .init_val = 0x2810,
+ .ro_mask = 0x8400,
+ .emu_mask = 0xFFFF,
+ .init = pt_common_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_word_reg_write,
+ .u.w.restore = pt_word_reg_restore,
+ },
+ /* Link Control reg */
+ {
+ .offset = PCI_EXP_LNKCTL,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFC34,
+ .emu_mask = 0xFFFF,
+ .init = pt_linkctrl_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_word_reg_write,
+ .u.w.restore = pt_word_reg_restore,
+ },
+ /* Device Control 2 reg */
+ {
+ .offset = 0x28,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFFE0,
+ .emu_mask = 0xFFFF,
+ .init = pt_devctrl2_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_word_reg_write,
+ .u.w.restore = pt_word_reg_restore,
+ },
+ /* Link Control 2 reg */
+ {
+ .offset = 0x30,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xE040,
+ .emu_mask = 0xFFFF,
+ .init = pt_linkctrl2_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_word_reg_write,
+ .u.w.restore = pt_word_reg_restore,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/*********************************
+ * Power Management Capability
+ */
+
+/* initialize Power Management Capabilities register */
+static uint32_t pt_pmc_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ PCIDevice *d = &s->dev;
+
+ if (!s->power_mgmt) {
+ return reg->init_val;
+ }
+
+ /* set Power Management Capabilities register */
+ s->pm_state->pmc_field = pci_get_word(d->config + real_offset);
+
+ return reg->init_val;
+}
+/* initialize PCI Power Management Control/Status register */
+static uint32_t pt_pmcsr_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ PCIDevice *d = &s->dev;
+ uint16_t cap_ver = 0;
+
+ if (!s->power_mgmt) {
+ return reg->init_val;
+ }
+
+ /* check PCI Power Management support version */
+ cap_ver = s->pm_state->pmc_field & PCI_PM_CAP_VER_MASK;
+
+ if (cap_ver > 2) {
+ /* set No Soft Reset */
+ s->pm_state->no_soft_reset =
+ pci_get_byte(d->config + real_offset) & PCI_PM_CTRL_NO_SOFT_RESET;
+ }
+
+ /* wake up real physical device */
+ switch (host_pci_read_word(s->real_device, real_offset)
+ & PCI_PM_CTRL_STATE_MASK) {
+ case 0:
+ break;
+ case 1:
+ PT_LOG("Power state transition D1 -> D0active\n");
+ host_pci_write_word(s->real_device, real_offset, 0);
+ break;
+ case 2:
+ PT_LOG("Power state transition D2 -> D0active\n");
+ host_pci_write_word(s->real_device, real_offset, 0);
+ usleep(200);
+ break;
+ case 3:
+ PT_LOG("Power state transition D3hot -> D0active\n");
+ host_pci_write_word(s->real_device, real_offset, 0);
+ usleep(10 * 1000);
+ pt_init_pci_config(s);
+ break;
+ }
+
+ return reg->init_val;
+}
+/* read Power Management Control/Status register */
+static int pt_pmcsr_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t valid_emu_mask = reg->emu_mask;
+
+ if (!s->power_mgmt) {
+ valid_emu_mask |= PCI_PM_CTRL_STATE_MASK | PCI_PM_CTRL_NO_SOFT_RESET;
+ }
+
+ valid_emu_mask = valid_emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
+
+ return 0;
+}
+/* reset Interrupt and I/O resource */
+static void pt_reset_interrupt_and_io_mapping(XenPCIPassthroughState *s)
+{
+ PCIDevice *d = &s->dev;
+ PCIIORegion *r;
+ int i = 0;
+ uint8_t e_device = 0;
+ uint8_t e_intx = 0;
+
+ /* unbind INTx */
+ e_device = PCI_SLOT(s->dev.devfn);
+ e_intx = pci_intx(s);
+
+ if (s->msi_trans_en == 0 && s->machine_irq) {
+ if (xc_domain_unbind_pt_irq(xen_xc, xen_domid, s->machine_irq,
+ PT_IRQ_TYPE_PCI, 0, e_device, e_intx, 0)) {
+ PT_LOG("Error: Unbinding of interrupt failed!\n");
+ }
+ }
+
+ /* disable MSI/MSI-X and MSI-INTx translation */
+ if (s->msi) {
+ pt_msi_disable(s);
+ }
+ if (s->msix) {
+ pt_msix_disable(s);
+ }
+
+ /* clear all virtual region address */
+ for (i = 0; i < PCI_NUM_REGIONS; i++) {
+ r = &d->io_regions[i];
+ r->addr = -1;
+ }
+
+ /* unmapping BAR */
+ pt_bar_mapping(s, 0, 0);
+}
+/* check power state transition */
+static int check_power_state(XenPCIPassthroughState *s)
+{
+ XenPTPM *pm_state = s->pm_state;
+ PCIDevice *d = &s->dev;
+ uint16_t read_val = 0;
+ uint16_t cur_state = 0;
+
+ /* get current power state */
+ read_val = host_pci_read_word(s->real_device,
+ pm_state->pm_base + PCI_PM_CTRL);
+ cur_state = read_val & PCI_PM_CTRL_STATE_MASK;
+
+ if (pm_state->req_state != cur_state) {
+ PT_LOG("Error: Failed to change power state. "
+ "[%02x:%02x.%x][requested state:%d][current state:%d]\n",
+ pci_bus_num(d->bus), PCI_SLOT(d->devfn), PCI_FUNC(d->devfn),
+ pm_state->req_state, cur_state);
+ return -1;
+ }
+ return 0;
+}
+/* write Power Management Control/Status register */
+static void pt_from_d3hot_to_d0_with_reset(void *opaque)
+{
+ XenPCIPassthroughState *s = opaque;
+ XenPTPM *pm_state = s->pm_state;
+ int ret = 0;
+
+ /* check power state */
+ ret = check_power_state(s);
+
+ if (ret < 0) {
+ goto out;
+ }
+
+ pt_init_pci_config(s);
+
+out:
+ /* power state transition flags off */
+ pm_state->flags &= ~PT_FLAG_TRANSITING;
+
+ qemu_free_timer(pm_state->pm_timer);
+ pm_state->pm_timer = NULL;
+}
+static void pt_default_power_transition(void *opaque)
+{
+ XenPCIPassthroughState *ptdev = opaque;
+ XenPTPM *pm_state = ptdev->pm_state;
+
+ /* check power state */
+ check_power_state(ptdev);
+
+ /* power state transition flags off */
+ pm_state->flags &= ~PT_FLAG_TRANSITING;
+
+ qemu_free_timer(pm_state->pm_timer);
+ pm_state->pm_timer = NULL;
+}
+static int pt_pmcsr_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t dev_value,
+ uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ PCIDevice *d = &s->dev;
+ uint16_t emu_mask = reg->emu_mask;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+ struct pt_pm_info *pm_state = s->pm_state;
+
+ if (!s->power_mgmt) {
+ emu_mask |= PCI_PM_CTRL_STATE_MASK | PCI_PM_CTRL_NO_SOFT_RESET;
+ }
+
+ /* modify emulate register */
+ writable_mask = emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ if (!s->power_mgmt) {
+ return 0;
+ }
+
+ /* set I/O device power state */
+ pm_state->cur_state = dev_value & PCI_PM_CTRL_STATE_MASK;
+
+ /* set Guest requested PowerState */
+ pm_state->req_state = *value & PCI_PM_CTRL_STATE_MASK;
+
+ /* check power state transition or not */
+ if (pm_state->cur_state == pm_state->req_state) {
+ /* not power state transition */
+ return 0;
+ }
+
+ /* check enable power state transition */
+ if ((pm_state->req_state != 0) &&
+ (pm_state->cur_state > pm_state->req_state)) {
+ PT_LOG("Error: Invalid power transition. "
+ "[%02x:%02x.%x][requested state:%d][current state:%d]\n",
+ pci_bus_num(d->bus), PCI_SLOT(d->devfn), PCI_FUNC(d->devfn),
+ pm_state->req_state, pm_state->cur_state);
+
+ return 0;
+ }
+
+ /* check if this device supports the requested power state */
+ if (((pm_state->req_state == 1) && !(pm_state->pmc_field & PCI_PM_CAP_D1))
+ || ((pm_state->req_state == 2) &&
+ !(pm_state->pmc_field & PCI_PM_CAP_D2))) {
+ PT_LOG("Error: Invalid power transition. "
+ "[%02x:%02x.%x][requested state:%d][current state:%d]\n",
+ pci_bus_num(d->bus), PCI_SLOT(d->devfn), PCI_FUNC(d->devfn),
+ pm_state->req_state, pm_state->cur_state);
+
+ return 0;
+ }
+
+ /* in case of transition related to D3hot, it's necessary to wait 10 ms.
+ * But because writing to register will be performed later on actually,
+ * don't start QEMUTimer right now, just alloc and init QEMUTimer here.
+ */
+ if ((pm_state->cur_state == 3) || (pm_state->req_state == 3)) {
+ if (pm_state->req_state == 0) {
+ /* alloc and init QEMUTimer */
+ if (!pm_state->no_soft_reset) {
+ pm_state->pm_timer = qemu_new_timer_ms(rt_clock,
+ pt_from_d3hot_to_d0_with_reset, s);
+
+ /* reset Interrupt and I/O resource mapping */
+ pt_reset_interrupt_and_io_mapping(s);
+ } else {
+ pm_state->pm_timer = qemu_new_timer_ms(rt_clock,
+ pt_default_power_transition, s);
+ }
+ } else {
+ /* alloc and init QEMUTimer */
+ pm_state->pm_timer = qemu_new_timer_ms(rt_clock,
+ pt_default_power_transition, s);
+ }
+
+ /* set power state transition delay */
+ pm_state->pm_delay = 10;
+
+ /* power state transition flags on */
+ pm_state->flags |= PT_FLAG_TRANSITING;
+ }
+ /* in case of transition related to D0, D1 and D2,
+ * no need to use QEMUTimer.
+ * So, we perfom writing to register here and then read it back.
+ */
+ else {
+ /* write power state to I/O device register */
+ host_pci_write_word(s->real_device, pm_state->pm_base + PCI_PM_CTRL,
+ *value);
+
+ /* in case of transition related to D2,
+ * it's necessary to wait 200 usec.
+ * But because QEMUTimer do not support microsec unit right now,
+ * so we do wait ourself here.
+ */
+ if ((pm_state->cur_state == 2) || (pm_state->req_state == 2)) {
+ usleep(200);
+ }
+
+ /* check power state */
+ check_power_state(s);
+
+ /* recreate value for writing to I/O device register */
+ *value = host_pci_read_word(s->real_device,
+ pm_state->pm_base + PCI_PM_CTRL);
+ }
+
+ return 0;
+}
+
+/* restore Power Management Control/Status register */
+static int pt_pmcsr_reg_restore(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint32_t real_offset, uint16_t dev_value,
+ uint16_t *value)
+{
+ /* create value for restoring to I/O device register
+ * No need to restore, just clear PME Enable and PME Status bit
+ * Note: register type of PME Status bit is RW1C, so clear by writing 1b
+ */
+ *value = (dev_value & ~PCI_PM_CTRL_PME_ENABLE) | PCI_PM_CTRL_PME_STATUS;
+
+ return 0;
+}
+
+
+/* Power Management Capability reg static infomation table */
+static XenPTRegInfo pt_emu_reg_pm_tbl[] = {
+ /* Next Pointer reg */
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = pt_ptr_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = NULL,
+ },
+ /* Power Management Capabilities reg */
+ {
+ .offset = PCI_CAP_FLAGS,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFFFF,
+ .emu_mask = 0xF9C8,
+ .init = pt_pmc_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_word_reg_write,
+ .u.w.restore = NULL,
+ },
+ /* PCI Power Management Control/Status reg */
+ {
+ .offset = PCI_PM_CTRL,
+ .size = 2,
+ .init_val = 0x0008,
+ .ro_mask = 0xE1FC,
+ .emu_mask = 0x8100,
+ .init = pt_pmcsr_reg_init,
+ .u.w.read = pt_pmcsr_reg_read,
+ .u.w.write = pt_pmcsr_reg_write,
+ .u.w.restore = pt_pmcsr_reg_restore,
+ },
+ {
+ .size = 0,
+ },
+};
+
+/********************************
+ * MSI Capability
+ */
+
+/* Message Control register */
+static uint32_t pt_msgctrl_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ PCIDevice *d = &s->dev;
+ uint16_t reg_field = 0;
+
+ /* use I/O device register's value as initial value */
+ reg_field = pci_get_word(d->config + real_offset);
+
+ if (reg_field & PCI_MSI_FLAGS_ENABLE) {
+ PT_LOG("MSI enabled already, disable first\n");
+ host_pci_write_word(s->real_device, real_offset,
+ reg_field & ~PCI_MSI_FLAGS_ENABLE);
+ }
+ s->msi->flags |= reg_field | MSI_FLAG_UNINIT;
+ s->msi->ctrl_offset = real_offset;
+
+ return reg->init_val;
+}
+static int pt_msgctrl_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t dev_value,
+ uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+ PCIDevice *pd = (PCIDevice *)s;
+ uint16_t val;
+
+ /* Currently no support for multi-vector */
+ if (*value & PCI_MSI_FLAGS_QSIZE) {
+ PT_LOG("Warning: try to set more than 1 vector ctrl %x\n", *value);
+ }
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+ /* update the msi_info too */
+ s->msi->flags |= cfg_entry->data &
+ ~(MSI_FLAG_UNINIT | PT_MSI_MAPPED | PCI_MSI_FLAGS_ENABLE);
+
+ /* create value for writing to I/O device register */
+ val = *value;
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* update MSI */
+ if (val & PCI_MSI_FLAGS_ENABLE) {
+ /* setup MSI pirq for the first time */
+ if (s->msi->flags & MSI_FLAG_UNINIT) {
+ if (s->msi_trans_en) {
+ PT_LOG("guest enabling MSI, disable MSI-INTx translation\n");
+ pt_disable_msi_translate(s);
+ } else {
+ /* Init physical one */
+ PT_LOG("setup msi for dev %x\n", pd->devfn);
+ if (pt_msi_setup(s)) {
+ /* We do not broadcast the error to the framework code, so
+ * that MSI errors are contained in MSI emulation code and
+ * QEMU can go on running.
+ * Guest MSI would be actually not working.
+ */
+ *value &= ~PCI_MSI_FLAGS_ENABLE;
+ PT_LOG("Warning: Can not map MSI for dev %x\n", pd->devfn);
+ return 0;
+ }
+ }
+ if (pt_msi_update(s)) {
+ *value &= ~PCI_MSI_FLAGS_ENABLE;
+ PT_LOG("Warning: Can not bind MSI for dev %x\n", pd->devfn);
+ return 0;
+ }
+ s->msi->flags &= ~MSI_FLAG_UNINIT;
+ s->msi->flags |= PT_MSI_MAPPED;
+ }
+ s->msi->flags |= PCI_MSI_FLAGS_ENABLE;
+ } else {
+ s->msi->flags &= ~PCI_MSI_FLAGS_ENABLE;
+ }
+
+ /* pass through MSI_ENABLE bit when no MSI-INTx translation */
+ if (!s->msi_trans_en) {
+ *value &= ~PCI_MSI_FLAGS_ENABLE;
+ *value |= val & PCI_MSI_FLAGS_ENABLE;
+ }
+
+ return 0;
+}
+
+/* initialize Message Upper Address register */
+static uint32_t pt_msgaddr64_reg_init(XenPCIPassthroughState *ptdev,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ /* no need to initialize in case of 32 bit type */
+ if (!(ptdev->msi->flags & PCI_MSI_FLAGS_64BIT)) {
+ return PT_INVALID_REG;
+ }
+
+ return reg->init_val;
+}
+/* this function will be called twice (for 32 bit and 64 bit type) */
+/* initialize Message Data register */
+static uint32_t pt_msgdata_reg_init(XenPCIPassthroughState *ptdev,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ uint32_t flags = ptdev->msi->flags;
+ uint32_t offset = reg->offset;
+
+ /* check the offset whether matches the type or not */
+ if (((offset == PCI_MSI_DATA_64) && (flags & PCI_MSI_FLAGS_64BIT)) ||
+ ((offset == PCI_MSI_DATA_32) && !(flags & PCI_MSI_FLAGS_64BIT))) {
+ return reg->init_val;
+ } else {
+ return PT_INVALID_REG;
+ }
+}
+
+/* write Message Address register */
+static int pt_msgaddr32_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint32_t *value,
+ uint32_t dev_value, uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t writable_mask = 0;
+ uint32_t throughable_mask = 0;
+ uint32_t old_addr = cfg_entry->data;
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+ /* update the msi_info too */
+ s->msi->addr_lo = cfg_entry->data;
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* update MSI */
+ if (cfg_entry->data != old_addr) {
+ if (s->msi->flags & PT_MSI_MAPPED) {
+ pt_msi_update(s);
+ }
+ }
+
+ return 0;
+}
+/* write Message Upper Address register */
+static int pt_msgaddr64_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint32_t *value,
+ uint32_t dev_value, uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t writable_mask = 0;
+ uint32_t throughable_mask = 0;
+ uint32_t old_addr = cfg_entry->data;
+
+ /* check whether the type is 64 bit or not */
+ if (!(s->msi->flags & PCI_MSI_FLAGS_64BIT)) {
+ /* exit I/O emulator */
+ PT_LOG("Error: why comes to Upper Address without 64 bit support??\n");
+ return -1;
+ }
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+ /* update the msi_info too */
+ s->msi->addr_hi = cfg_entry->data;
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* update MSI */
+ if (cfg_entry->data != old_addr) {
+ if (s->msi->flags & PT_MSI_MAPPED) {
+ pt_msi_update(s);
+ }
+ }
+
+ return 0;
+}
+
+
+/* this function will be called twice (for 32 bit and 64 bit type) */
+/* write Message Data register */
+static int pt_msgdata_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t dev_value,
+ uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+ uint16_t old_data = cfg_entry->data;
+ uint32_t flags = s->msi->flags;
+ uint32_t offset = reg->offset;
+
+ /* check the offset whether matches the type or not */
+ if (!((offset == PCI_MSI_DATA_64) && (flags & PCI_MSI_FLAGS_64BIT)) &&
+ !((offset == PCI_MSI_DATA_32) && !(flags & PCI_MSI_FLAGS_64BIT))) {
+ /* exit I/O emulator */
+ PT_LOG("Error: the offset is not match with the 32/64 bit type!!\n");
+ return -1;
+ }
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+ /* update the msi_info too */
+ s->msi->data = cfg_entry->data;
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* update MSI */
+ if (cfg_entry->data != old_data) {
+ if (flags & PT_MSI_MAPPED) {
+ pt_msi_update(s);
+ }
+ }
+
+ return 0;
+}
+
+/* MSI Capability Structure reg static infomation table */
+static XenPTRegInfo pt_emu_reg_msi_tbl[] = {
+ /* Next Pointer reg */
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = pt_ptr_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = NULL,
+ },
+ /* Message Control reg */
+ {
+ .offset = PCI_MSI_FLAGS,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFF8E,
+ .emu_mask = 0x007F,
+ .init = pt_msgctrl_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_msgctrl_reg_write,
+ .u.w.restore = NULL,
+ },
+ /* Message Address reg */
+ {
+ .offset = PCI_MSI_ADDRESS_LO,
+ .size = 4,
+ .init_val = 0x00000000,
+ .ro_mask = 0x00000003,
+ .emu_mask = 0xFFFFFFFF,
+ .no_wb = 1,
+ .init = pt_common_reg_init,
+ .u.dw.read = pt_long_reg_read,
+ .u.dw.write = pt_msgaddr32_reg_write,
+ .u.dw.restore = NULL,
+ },
+ /* Message Upper Address reg (if PCI_MSI_FLAGS_64BIT set) */
+ {
+ .offset = PCI_MSI_ADDRESS_HI,
+ .size = 4,
+ .init_val = 0x00000000,
+ .ro_mask = 0x00000000,
+ .emu_mask = 0xFFFFFFFF,
+ .no_wb = 1,
+ .init = pt_msgaddr64_reg_init,
+ .u.dw.read = pt_long_reg_read,
+ .u.dw.write = pt_msgaddr64_reg_write,
+ .u.dw.restore = NULL,
+ },
+ /* Message Data reg (16 bits of data for 32-bit devices) */
+ {
+ .offset = PCI_MSI_DATA_32,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0x0000,
+ .emu_mask = 0xFFFF,
+ .no_wb = 1,
+ .init = pt_msgdata_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_msgdata_reg_write,
+ .u.w.restore = NULL,
+ },
+ /* Message Data reg (16 bits of data for 64-bit devices) */
+ {
+ .offset = PCI_MSI_DATA_64,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0x0000,
+ .emu_mask = 0xFFFF,
+ .no_wb = 1,
+ .init = pt_msgdata_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_msgdata_reg_write,
+ .u.w.restore = NULL,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/**************************************
+ * MSI-X Capability
+ */
+
+/* Message Control register for MSI-X */
+static uint32_t pt_msixctrl_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ PCIDevice *d = &s->dev;
+ uint16_t reg_field = 0;
+
+ /* use I/O device register's value as initial value */
+ reg_field = pci_get_word(d->config + real_offset);
+
+ if (reg_field & PCI_MSIX_FLAGS_ENABLE) {
+ PT_LOG("MSIX enabled already, disable first\n");
+ host_pci_write_word(s->real_device, real_offset,
+ reg_field & ~PCI_MSIX_FLAGS_ENABLE);
+ }
+
+ s->msix->ctrl_offset = real_offset;
+
+ return reg->init_val;
+}
+static int pt_msixctrl_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint16_t *value,
+ uint16_t dev_value, uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* update MSI-X */
+ if ((*value & PCI_MSIX_FLAGS_ENABLE)
+ && !(*value & PCI_MSIX_FLAGS_MASKALL)) {
+ if (s->msi_trans_en) {
+ PT_LOG("guest enabling MSI-X, disable MSI-INTx translation\n");
+ pt_disable_msi_translate(s);
+ }
+ pt_msix_update(s);
+ }
+
+ s->msix->enabled = !!(*value & PCI_MSIX_FLAGS_ENABLE);
+
+ return 0;
+}
+
+/* MSI-X Capability Structure reg static infomation table */
+static XenPTRegInfo pt_emu_reg_msix_tbl[] = {
+ /* Next Pointer reg */
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = pt_ptr_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = NULL,
+ },
+ /* Message Control reg */
+ {
+ .offset = PCI_MSI_FLAGS,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0x3FFF,
+ .emu_mask = 0x0000,
+ .init = pt_msixctrl_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_msixctrl_reg_write,
+ .u.w.restore = NULL,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/****************************
+ * Capabilities
+ */
+
+/* AER register operations */
+
+static void aer_save_one_register(XenPCIPassthroughState *s, int offset)
+{
+ PCIDevice *d = &s->dev;
+ uint32_t aer_base = s->pm_state->aer_base;
+ uint32_t val = 0;
+
+ val = host_pci_read_long(s->real_device, aer_base + offset);
+ pci_set_long(d->config + aer_base + offset, val);
+}
+static void pt_aer_reg_save(XenPCIPassthroughState *s)
+{
+ /* after reset, following register values should be restored.
+ * So, save them.
+ */
+ aer_save_one_register(s, PCI_ERR_UNCOR_MASK);
+ aer_save_one_register(s, PCI_ERR_UNCOR_SEVER);
+ aer_save_one_register(s, PCI_ERR_COR_MASK);
+ aer_save_one_register(s, PCI_ERR_CAP);
+}
+static void aer_restore_one_register(XenPCIPassthroughState *s, int offset)
+{
+ PCIDevice *d = &s->dev;
+ uint32_t aer_base = s->pm_state->aer_base;
+ uint32_t config = 0;
+
+ config = pci_get_long(d->config + aer_base + offset);
+ host_pci_write_long(s->real_device, aer_base + offset, config);
+}
+static void pt_aer_reg_restore(XenPCIPassthroughState *s)
+{
+ /* the following registers should be reconfigured to correct values
+ * after reset. restore them.
+ * other registers should not be reconfigured after reset
+ * if there is no reason
+ */
+ aer_restore_one_register(s, PCI_ERR_UNCOR_MASK);
+ aer_restore_one_register(s, PCI_ERR_UNCOR_SEVER);
+ aer_restore_one_register(s, PCI_ERR_COR_MASK);
+ aer_restore_one_register(s, PCI_ERR_CAP);
+}
+
+/* capability structure register group size functions */
+
+static uint8_t pt_reg_grp_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset)
+{
+ return grp_reg->grp_size;
+}
+/* get Power Management Capability Structure register group size */
+static uint8_t pt_pm_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset)
+{
+ if (!s->power_mgmt) {
+ return grp_reg->grp_size;
+ }
+
+ s->pm_state = g_malloc0(sizeof (XenPTPM));
+
+ /* set Power Management Capability base offset */
+ s->pm_state->pm_base = base_offset;
+
+ /* find AER register and set AER Capability base offset */
+ s->pm_state->aer_base = host_pci_find_ext_cap_offset(s->real_device,
+ PCI_EXT_CAP_ID_ERR);
+
+ /* save AER register */
+ if (s->pm_state->aer_base) {
+ pt_aer_reg_save(s);
+ }
+
+ return grp_reg->grp_size;
+}
+/* get Vendor Specific Capability Structure register group size */
+static uint8_t pt_vendor_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset)
+{
+ return pci_get_byte(s->dev.config + base_offset + 0x02);
+}
+/* get PCI Express Capability Structure register group size */
+static uint8_t pt_pcie_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset)
+{
+ PCIDevice *d = &s->dev;
+ uint16_t exp_flag = 0;
+ uint16_t type = 0;
+ uint16_t version = 0;
+ uint8_t pcie_size = 0;
+
+ exp_flag = pci_get_word(d->config + base_offset + PCI_EXP_FLAGS);
+ type = (exp_flag & PCI_EXP_FLAGS_TYPE) >> 4;
+ version = exp_flag & PCI_EXP_FLAGS_VERS;
+
+ /* calculate size depend on capability version and device/port type */
+ /* in case of PCI Express Base Specification Rev 1.x */
+ if (version == 1) {
+ /* The PCI Express Capabilities, Device Capabilities, and Device
+ * Status/Control registers are required for all PCI Express devices.
+ * The Link Capabilities and Link Status/Control are required for all
+ * Endpoints that are not Root Complex Integrated Endpoints. Endpoints
+ * are not required to implement registers other than those listed
+ * above and terminate the capability structure.
+ */
+ switch (type) {
+ case PCI_EXP_TYPE_ENDPOINT:
+ case PCI_EXP_TYPE_LEG_END:
+ pcie_size = 0x14;
+ break;
+ case PCI_EXP_TYPE_RC_END:
+ /* has no link */
+ pcie_size = 0x0C;
+ break;
+ /* only EndPoint passthrough is supported */
+ case PCI_EXP_TYPE_ROOT_PORT:
+ case PCI_EXP_TYPE_UPSTREAM:
+ case PCI_EXP_TYPE_DOWNSTREAM:
+ case PCI_EXP_TYPE_PCI_BRIDGE:
+ case PCI_EXP_TYPE_PCIE_BRIDGE:
+ case PCI_EXP_TYPE_RC_EC:
+ default:
+ hw_error("Internal error: Unsupported device/port type[%d]. "
+ "I/O emulator exit.\n", type);
+ }
+ }
+ /* in case of PCI Express Base Specification Rev 2.0 */
+ else if (version == 2) {
+ switch (type) {
+ case PCI_EXP_TYPE_ENDPOINT:
+ case PCI_EXP_TYPE_LEG_END:
+ case PCI_EXP_TYPE_RC_END:
+ /* For Functions that do not implement the registers,
+ * these spaces must be hardwired to 0b.
+ */
+ pcie_size = 0x3C;
+ break;
+ /* only EndPoint passthrough is supported */
+ case PCI_EXP_TYPE_ROOT_PORT:
+ case PCI_EXP_TYPE_UPSTREAM:
+ case PCI_EXP_TYPE_DOWNSTREAM:
+ case PCI_EXP_TYPE_PCI_BRIDGE:
+ case PCI_EXP_TYPE_PCIE_BRIDGE:
+ case PCI_EXP_TYPE_RC_EC:
+ default:
+ hw_error("Internal error: Unsupported device/port type[%d]. "
+ "I/O emulator exit.\n", type);
+ }
+ } else {
+ hw_error("Internal error: Unsupported capability version[%d]. "
+ "I/O emulator exit.\n", version);
+ }
+
+ return pcie_size;
+}
+/* get MSI Capability Structure register group size */
+static uint8_t pt_msi_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset)
+{
+ PCIDevice *d = &s->dev;
+ uint16_t msg_ctrl = 0;
+ uint8_t msi_size = 0xa;
+
+ msg_ctrl = pci_get_word(d->config + (base_offset + PCI_MSI_FLAGS));
+
+ /* check 64 bit address capable & Per-vector masking capable */
+ if (msg_ctrl & PCI_MSI_FLAGS_64BIT) {
+ msi_size += 4;
+ }
+ if (msg_ctrl & PCI_MSI_FLAGS_MASKBIT) {
+ msi_size += 10;
+ }
+
+ s->msi = g_malloc0(sizeof (XenPTMSI));
+ s->msi->pirq = -1;
+ PT_LOG("done\n");
+
+ return msi_size;
+}
+/* get MSI-X Capability Structure register group size */
+static uint8_t pt_msix_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset)
+{
+ int ret = 0;
+
+ ret = pt_msix_init(s, base_offset);
+
+ if (ret == -1) {
+ hw_error("Internal error: Invalid pt_msix_init return value[%d]. "
+ "I/O emulator exit.\n", ret);
+ }
+
+ return grp_reg->grp_size;
+}
+
+
+static const XenPTRegGroupInfo pt_emu_reg_grp_tbl[] = {
+ /* Header Type0 reg group */
+ {
+ .grp_id = 0xFF,
+ .grp_type = GRP_TYPE_EMU,
+ .grp_size = 0x40,
+ .size_init = pt_reg_grp_size_init,
+ .emu_reg_tbl= pt_emu_reg_header0_tbl,
+ },
+ /* PCI PowerManagement Capability reg group */
+ {
+ .grp_id = PCI_CAP_ID_PM,
+ .grp_type = GRP_TYPE_EMU,
+ .grp_size = PCI_PM_SIZEOF,
+ .size_init = pt_pm_size_init,
+ .emu_reg_tbl= pt_emu_reg_pm_tbl,
+ },
+ /* AGP Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_AGP,
+ .grp_type = GRP_TYPE_HARDWIRED,
+ .grp_size = 0x30,
+ .size_init = pt_reg_grp_size_init,
+ },
+ /* Vital Product Data Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_VPD,
+ .grp_type = GRP_TYPE_EMU,
+ .grp_size = 0x08,
+ .size_init = pt_reg_grp_size_init,
+ .emu_reg_tbl= pt_emu_reg_vpd_tbl,
+ },
+ /* Slot Identification reg group */
+ {
+ .grp_id = PCI_CAP_ID_SLOTID,
+ .grp_type = GRP_TYPE_HARDWIRED,
+ .grp_size = 0x04,
+ .size_init = pt_reg_grp_size_init,
+ },
+ /* MSI Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_MSI,
+ .grp_type = GRP_TYPE_EMU,
+ .grp_size = 0xFF,
+ .size_init = pt_msi_size_init,
+ .emu_reg_tbl= pt_emu_reg_msi_tbl,
+ },
+ /* PCI-X Capabilities List Item reg group */
+ {
+ .grp_id = PCI_CAP_ID_PCIX,
+ .grp_type = GRP_TYPE_HARDWIRED,
+ .grp_size = 0x18,
+ .size_init = pt_reg_grp_size_init,
+ },
+ /* Vendor Specific Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_VNDR,
+ .grp_type = GRP_TYPE_EMU,
+ .grp_size = 0xFF,
+ .size_init = pt_vendor_size_init,
+ .emu_reg_tbl= pt_emu_reg_vendor_tbl,
+ },
+ /* SHPC Capability List Item reg group */
+ {
+ .grp_id = PCI_CAP_ID_SHPC,
+ .grp_type = GRP_TYPE_HARDWIRED,
+ .grp_size = 0x08,
+ .size_init = pt_reg_grp_size_init,
+ },
+ /* Subsystem ID and Subsystem Vendor ID Capability List Item reg group */
+ {
+ .grp_id = PCI_CAP_ID_SSVID,
+ .grp_type = GRP_TYPE_HARDWIRED,
+ .grp_size = 0x08,
+ .size_init = pt_reg_grp_size_init,
+ },
+ /* AGP 8x Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_AGP3,
+ .grp_type = GRP_TYPE_HARDWIRED,
+ .grp_size = 0x30,
+ .size_init = pt_reg_grp_size_init,
+ },
+ /* PCI Express Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_EXP,
+ .grp_type = GRP_TYPE_EMU,
+ .grp_size = 0xFF,
+ .size_init = pt_pcie_size_init,
+ .emu_reg_tbl= pt_emu_reg_pcie_tbl,
+ },
+ /* MSI-X Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_MSIX,
+ .grp_type = GRP_TYPE_EMU,
+ .grp_size = 0x0C,
+ .size_init = pt_msix_size_init,
+ .emu_reg_tbl= pt_emu_reg_msix_tbl,
+ },
+ {
+ .grp_size = 0,
+ },
+};
+
+/* initialize Capabilities Pointer or Next Pointer register */
+static uint32_t pt_ptr_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset)
+{
+ /* uint32_t reg_field = (uint32_t)s->dev.config[real_offset]; */
+ uint32_t reg_field = pci_get_byte(s->dev.config + real_offset);
+ int i;
+
+ /* find capability offset */
+ while (reg_field) {
+ for (i = 0; pt_emu_reg_grp_tbl[i].grp_size != 0; i++) {
+ if (pt_hide_dev_cap(s->real_device,
+ pt_emu_reg_grp_tbl[i].grp_id)) {
+ continue;
+ }
+ if (pt_emu_reg_grp_tbl[i].grp_id == s->dev.config[reg_field]) {
+ if (pt_emu_reg_grp_tbl[i].grp_type == GRP_TYPE_EMU) {
+ goto out;
+ }
+ /* ignore the 0 hardwired capability, find next one */
+ break;
+ }
+ }
+ /* next capability */
+ /* reg_field = (uint32_t)s->dev.config[reg_field + 1]; */
+ reg_field = pci_get_byte(s->dev.config + reg_field + 1);
+ }
+
+out:
+ return reg_field;
+}
+
+
+/*************
+ * Main
+ */
+
+/* restore a part of I/O device register */
+static void pt_config_restore(XenPCIPassthroughState *s)
+{
+ XenPTRegGroup *reg_grp_entry = NULL;
+ XenPTReg *reg_entry = NULL;
+ XenPTRegInfo *reg = NULL;
+ uint32_t real_offset = 0;
+ uint32_t read_val = 0;
+ uint32_t val = 0;
+ int ret = 0;
+
+ /* find emulate register group entry */
+ QLIST_FOREACH(reg_grp_entry, &s->reg_grp_tbl, entries) {
+ /* find emulate register entry */
+ QLIST_FOREACH(reg_entry, ®_grp_entry->reg_tbl_list, entries) {
+ reg = reg_entry->reg;
+
+ /* check whether restoring is needed */
+ if (!reg->u.b.restore) {
+ continue;
+ }
+
+ real_offset = reg_grp_entry->base_offset + reg->offset;
+
+ /* read I/O device register value */
+ ret = host_pci_read_block(s->real_device, real_offset,
+ (uint8_t *)&read_val, reg->size);
+
+ if (!ret) {
+ PT_LOG("Error: pci_read_block failed. "
+ "return value[%d].\n", ret);
+ memset(&read_val, 0xff, reg->size);
+ }
+
+ val = 0;
+
+ /* restore based on register size */
+ switch (reg->size) {
+ case 1:
+ /* byte register */
+ ret = reg->u.b.restore(s, reg_entry, real_offset,
+ (uint8_t)read_val, (uint8_t *)&val);
+ break;
+ case 2:
+ /* word register */
+ ret = reg->u.w.restore(s, reg_entry, real_offset,
+ (uint16_t)read_val, (uint16_t *)&val);
+ break;
+ case 4:
+ /* double word register */
+ ret = reg->u.dw.restore(s, reg_entry, real_offset,
+ (uint32_t)read_val, (uint32_t *)&val);
+ break;
+ }
+
+ /* restoring error */
+ if (ret < 0) {
+ hw_error("Internal error: Invalid restoring "
+ "return value[%d]. I/O emulator exit.\n", ret);
+ }
+
+ PT_LOG_CONFIG("[%02x:%02x.%x]: address=%04x val=0x%08x len=%d\n",
+ pci_bus_num(s->dev.bus), PCI_SLOT(s->dev.devfn),
+ PCI_FUNC(s->dev.devfn),
+ real_offset, val, reg->size);
+
+ ret = host_pci_write_block(s->real_device, real_offset,
+ (uint8_t *)&val, reg->size);
+
+ if (!ret) {
+ PT_LOG("Error: pci_write_block failed. "
+ "return value[%d].\n", ret);
+ }
+ }
+ }
+
+ /* if AER supported, restore it */
+ if (s->pm_state->aer_base) {
+ pt_aer_reg_restore(s);
+ }
+}
+/* reinitialize all emulate registers */
+static void pt_config_reinit(XenPCIPassthroughState *s)
+{
+ XenPTRegGroup *reg_grp_entry = NULL;
+ XenPTReg *reg_entry = NULL;
+ XenPTRegInfo *reg = NULL;
+
+ /* find emulate register group entry */
+ QLIST_FOREACH(reg_grp_entry, &s->reg_grp_tbl, entries) {
+ /* find emulate register entry */
+ QLIST_FOREACH(reg_entry, ®_grp_entry->reg_tbl_list, entries) {
+ reg = reg_entry->reg;
+ if (reg->init) {
+ /* initialize emulate register */
+ reg_entry->data =
+ reg->init(s, reg_entry->reg,
+ reg_grp_entry->base_offset + reg->offset);
+ }
+ }
+ }
+}
+
+static int pt_init_pci_config(XenPCIPassthroughState *s)
+{
+ PCIDevice *d = &s->dev;
+ int ret = 0;
+
+ PT_LOG("Reinitialize PCI configuration registers due to power state"
+ " transition with internal reset. [%02x:%02x.%x]\n",
+ pci_bus_num(d->bus), PCI_SLOT(d->devfn), PCI_FUNC(d->devfn));
+
+ /* restore a part of I/O device register */
+ pt_config_restore(s);
+
+ /* reinitialize all emulate register */
+ pt_config_reinit(s);
+
+ /* setup MSI-INTx translation if support */
+ ret = pt_enable_msi_translate(s);
+
+ /* rebind machine_irq to device */
+ if (ret < 0 && s->machine_irq != 0) {
+ uint8_t e_device = PCI_SLOT(s->dev.devfn);
+ uint8_t e_intx = pci_intx(s);
+
+ ret = xc_domain_bind_pt_pci_irq(xen_xc, xen_domid, s->machine_irq, 0,
+ e_device, e_intx);
+ if (ret < 0) {
+ PT_LOG("Error: Rebinding of interrupt failed! ret=%d\n", ret);
+ }
+ }
+
+ return ret;
+}
+
+static uint8_t find_cap_offset(XenPCIPassthroughState *s, uint8_t cap)
+{
+ int id;
+ int max_cap = 48;
+ int pos = PCI_CAPABILITY_LIST;
+ int status;
+
+ status = host_pci_read_byte(s->real_device, PCI_STATUS);
+ if ((status & PCI_STATUS_CAP_LIST) == 0) {
+ return 0;
+ }
+
+ while (max_cap--) {
+ pos = host_pci_read_byte(s->real_device, pos);
+ if (pos < 0x40) {
+ break;
+ }
+
+ pos &= ~3;
+ id = host_pci_read_byte(s->real_device, pos + PCI_CAP_LIST_ID);
+
+ if (id == 0xff) {
+ break;
+ }
+ if (id == cap) {
+ return pos;
+ }
+
+ pos += PCI_CAP_LIST_NEXT;
+ }
+ return 0;
+}
+
+static void pt_config_reg_init(XenPCIPassthroughState *s,
+ XenPTRegGroup *reg_grp, XenPTRegInfo *reg)
+{
+ XenPTReg *reg_entry;
+ uint32_t data = 0;
+
+ reg_entry = g_malloc0(sizeof (XenPTReg));
+
+ reg_entry->reg = reg;
+ reg_entry->data = 0;
+
+ if (reg->init) {
+ /* initialize emulate register */
+ data = reg->init(s, reg_entry->reg,
+ reg_grp->base_offset + reg->offset);
+ if (data == PT_INVALID_REG) {
+ /* free unused BAR register entry */
+ free(reg_entry);
+ return;
+ }
+ /* set register value */
+ reg_entry->data = data;
+ }
+ /* list add register entry */
+ QLIST_INSERT_HEAD(®_grp->reg_tbl_list, reg_entry, entries);
+
+ return;
+}
+
+void pt_config_init(XenPCIPassthroughState *s)
+{
+ XenPTRegGroup *reg_grp_entry = NULL;
+ uint32_t reg_grp_offset = 0;
+ XenPTRegInfo *reg_tbl = NULL;
+ int i, j;
+
+ QLIST_INIT(&s->reg_grp_tbl);
+
+ for (i = 0; pt_emu_reg_grp_tbl[i].grp_size != 0; i++) {
+ if (pt_emu_reg_grp_tbl[i].grp_id != 0xFF) {
+ if (pt_hide_dev_cap(s->real_device,
+ pt_emu_reg_grp_tbl[i].grp_id)) {
+ continue;
+ }
+
+ reg_grp_offset = find_cap_offset(s, pt_emu_reg_grp_tbl[i].grp_id);
+
+ if (!reg_grp_offset) {
+ continue;
+ }
+ }
+
+ reg_grp_entry = g_malloc0(sizeof (XenPTRegGroup));
+ QLIST_INIT(®_grp_entry->reg_tbl_list);
+ QLIST_INSERT_HEAD(&s->reg_grp_tbl, reg_grp_entry, entries);
+
+ reg_grp_entry->base_offset = reg_grp_offset;
+ reg_grp_entry->reg_grp = pt_emu_reg_grp_tbl + i;
+ if (pt_emu_reg_grp_tbl[i].size_init) {
+ /* get register group size */
+ reg_grp_entry->size =
+ pt_emu_reg_grp_tbl[i].size_init(s, reg_grp_entry->reg_grp,
+ reg_grp_offset);
+ }
+
+ if (pt_emu_reg_grp_tbl[i].grp_type == GRP_TYPE_EMU) {
+ if (pt_emu_reg_grp_tbl[i].emu_reg_tbl) {
+ reg_tbl = pt_emu_reg_grp_tbl[i].emu_reg_tbl;
+ /* initialize capability register */
+ for (j = 0; reg_tbl->size != 0; j++, reg_tbl++) {
+ /* initialize capability register */
+ pt_config_reg_init(s, reg_grp_entry, reg_tbl);
+ }
+ }
+ }
+ reg_grp_offset = 0;
+ }
+
+ return;
+}
--
Anthony PERARD
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