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[Qemu-devel] [PATCH V6 08/11] Introduce Xen PCI Passthrough, PCI config
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From: |
Anthony PERARD |
|
Subject: |
[Qemu-devel] [PATCH V6 08/11] Introduce Xen PCI Passthrough, PCI config space helpers (2/3) |
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Date: |
Mon, 13 Feb 2012 12:20:10 +0000 |
From: Allen Kay <address@hidden>
A more complete history can be found here:
git://xenbits.xensource.com/qemu-xen-unstable.git
Signed-off-by: Allen Kay <address@hidden>
Signed-off-by: Guy Zana <address@hidden>
Signed-off-by: Anthony PERARD <address@hidden>
---
hw/xen_pci_passthrough.c | 10 +
hw/xen_pci_passthrough.h | 2 +
hw/xen_pci_passthrough_config_init.c | 1481 ++++++++++++++++++++++++++++++++++
3 files changed, 1493 insertions(+), 0 deletions(-)
diff --git a/hw/xen_pci_passthrough.c b/hw/xen_pci_passthrough.c
index 4ab1218..bdc3690 100644
--- a/hw/xen_pci_passthrough.c
+++ b/hw/xen_pci_passthrough.c
@@ -676,6 +676,13 @@ static int pt_initfn(PCIDevice *d)
/* Handle real device's MMIO/PIO BARs */
pt_register_regions(s);
+ /* reinitialize each config register to be emulated */
+ if (pt_config_init(s)) {
+ PT_ERR(d, "PCI Config space initialisation failed.\n");
+ host_pci_device_put(s->real_device);
+ return -1;
+ }
+
/* Bind interrupt */
if (!s->dev.config[PCI_INTERRUPT_PIN]) {
PT_LOG(d, "no pin interrupt\n");
@@ -773,6 +780,9 @@ static int pt_unregister_device(PCIDevice *d)
}
}
+ /* delete all emulated config registers */
+ pt_config_delete(s);
+
/* unregister real device's MMIO/PIO BARs */
pt_unregister_regions(s);
diff --git a/hw/xen_pci_passthrough.h b/hw/xen_pci_passthrough.h
index 7a609b5..0b9902d 100644
--- a/hw/xen_pci_passthrough.h
+++ b/hw/xen_pci_passthrough.h
@@ -70,6 +70,8 @@ typedef int (*conf_byte_restore)
#define PT_BAR_ALLF 0xFFFFFFFF /* BAR ALLF value */
#define PT_PCI_BAR_UNMAPPED (-1)
+#define PCI_CAP_MAX 48
+
typedef enum {
GRP_TYPE_HARDWIRED = 0, /* 0 Hardwired reg group */
diff --git a/hw/xen_pci_passthrough_config_init.c
b/hw/xen_pci_passthrough_config_init.c
index 1e9de64..2fb27ff 100644
--- a/hw/xen_pci_passthrough_config_init.c
+++ b/hw/xen_pci_passthrough_config_init.c
@@ -1,11 +1,1492 @@
+/*
+ * Copyright (c) 2007, Neocleus Corporation.
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ * Alex Novik <address@hidden>
+ * Allen Kay <address@hidden>
+ * Guy Zana <address@hidden>
+ *
+ * This file implements direct PCI assignment to a HVM guest
+ */
+
+#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)))
+
+#define PT_INVALID_REG 0xFFFFFFFF /* invalid register value */
+
+/* prototype */
+
+static int pt_ptr_reg_init(XenPCIPassthroughState *s, XenPTRegInfo *reg,
+ uint32_t real_offset, uint32_t *data);
+
+
+/* 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.
+ *
+ * The datasheet is available at
+ *
http://download.intel.com/design/network/datashts/82599_datasheet.pdf
+ *
+ * See 'Table 9.7. VF PCIe Configuration Space' of the datasheet, the
+ * PCI Express Capability Structure of the VF of Intel 82599 10GbE
+ * Controller looks trivial, e.g., the PCI Express Capabilities
+ * Register is 0, so the Capability Version is 0 and
+ * pt_pcie_size_init() would fail.
+ */
+ 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 ((0 < index) && (index < PCI_ROM_SLOT)) {
+ int flags = s->real_device->io_regions[index - 1].flags;
+
+ if ((flags & IORESOURCE_MEM) && (flags & IORESOURCE_MEM_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->io_regions[index].flags & IORESOURCE_IO) {
+ return PT_BAR_FLAG_IO;
+ } else {
+ return PT_BAR_FLAG_MEM;
+ }
+}
+
+
+/****************
+ * general register functions
+ */
+
+/* register initialization function */
+
+static int pt_common_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ *data = reg->init_val;
+ return 0;
+}
+
+/* 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 int pt_vendor_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ *data = s->real_device->vendor_id;
+ return 0;
+}
+static int pt_device_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ *data = s->real_device->device_id;
+ return 0;
+}
+static int pt_status_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ XenPTRegGroup *reg_grp_entry = NULL;
+ XenPTReg *reg_entry = NULL;
+ uint32_t 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 {
+ xen_shutdown_fatal_error("Internal error: Couldn't find XenPTReg*"
+ " for Capabilities Pointer register."
+ " (%s)\n", __func__);
+ return -1;
+ }
+ } else {
+ xen_shutdown_fatal_error("Internal error: Couldn't find XenPTRegGroup"
+ " for Header. (%s)\n", __func__);
+ return -1;
+ }
+
+ *data = reg_field;
+ return 0;
+}
+static int pt_header_type_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ /* read PCI_HEADER_TYPE */
+ *data = reg->init_val | 0x80;
+ return 0;
+}
+
+/* initialize Interrupt Pin register */
+static int pt_irqpin_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ *data = pci_read_intx(s);
+ return 0;
+}
+
+/* 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) {
+ throughable_mask |= PCI_COMMAND_INTX_DISABLE;
+ } else {
+ if (s->machine_irq) {
+ throughable_mask |= PCI_COMMAND_INTX_DISABLE;
+ }
+ }
+
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ 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 the 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 */
+#define PT_BAR_MEM_RO_MASK 0x0000000F /* BAR ReadOnly mask(Memory) */
+#define PT_BAR_MEM_EMU_MASK 0xFFFFFFF0 /* BAR emul mask(Memory) */
+#define PT_BAR_IO_RO_MASK 0x00000003 /* BAR ReadOnly mask(I/O) */
+#define PT_BAR_IO_EMU_MASK 0xFFFFFFFC /* BAR emul mask(I/O) */
+
+static inline uint32_t base_address_with_flags(HostPCIIORegion *hr)
+{
+ if ((hr->flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
+ return hr->base_addr | (hr->flags & ~PCI_BASE_ADDRESS_IO_MASK);
+ } else {
+ return hr->base_addr | (hr->flags & ~PCI_BASE_ADDRESS_MEM_MASK);
+ }
+}
+
+static int pt_bar_reg_init(XenPCIPassthroughState *s, XenPTRegInfo *reg,
+ uint32_t real_offset, uint32_t *data)
+{
+ uint32_t reg_field = 0;
+ int index;
+
+ index = pt_bar_offset_to_index(reg->offset);
+ if (index < 0 || index >= PCI_NUM_REGIONS) {
+ PT_ERR(&s->dev, "Internal error: Invalid BAR index [%d].\n", index);
+ return -1;
+ }
+
+ s->bases[index].e_physbase = PT_PCI_BAR_UNMAPPED;
+
+ /* 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;
+ }
+
+ *data = reg_field;
+ return 0;
+}
+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 || index >= PCI_NUM_REGIONS) {
+ PT_ERR(&s->dev, "Internal error: Invalid BAR index [%d].\n", index);
+ return -1;
+ }
+
+ /* use fixed-up value from kernel sysfs */
+ *value = base_address_with_flags(&s->real_device->io_regions[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;
+ const 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 r_size = 0;
+ int index = 0;
+
+ index = pt_bar_offset_to_index(reg->offset);
+ if (index < 0 || index >= PCI_NUM_REGIONS) {
+ PT_ERR(d, "Internal error: Invalid BAR index [%d].\n", index);
+ return -1;
+ }
+
+ 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 values depend on the 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:
+ /* nothing to do */
+ break;
+ case PT_BAR_FLAG_UPPER:
+ if (cfg_entry->data) {
+ if (cfg_entry->data != (PT_BAR_ALLF & ~bar_ro_mask)) {
+ PT_WARN(d, "Guest attempt to set high MMIO Base Address. "
+ "Ignore mapping. "
+ "(offset: 0x%02x, high address: 0x%08x)\n",
+ reg->offset, cfg_entry->data);
+ }
+ }
+ break;
+ default:
+ break;
+ }
+
+ /* 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) {
+ PT_ERR(&s->dev, "Internal error: Invalid BAR index [%d].\n", index);
+ return -1;
+ }
+
+ /* use value from kernel sysfs */
+ if (s->bases[index].bar_flag == PT_BAR_FLAG_UPPER) {
+ *value = s->real_device->io_regions[index - 1].base_addr >> 32;
+ } else {
+ *value = base_address_with_flags(&s->real_device->io_regions[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;
+ uint32_t v;
+
+ if (host_pci_get_long(s->real_device, PCI_ROM_ADDRESS, &v)) {
+ return -1;
+ }
+ /* use value from kernel sysfs */
+ *value = PT_MERGE_VALUE(v, 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
+ */
+
+static inline uint8_t get_capability_version(XenPCIPassthroughState *s,
+ uint32_t offset)
+{
+ uint8_t flags = pci_get_byte(s->dev.config + offset + PCI_EXP_FLAGS);
+ return flags & PCI_EXP_FLAGS_VERS;
+}
+
+static inline uint8_t get_device_type(XenPCIPassthroughState *s,
+ uint32_t offset)
+{
+ uint8_t flags = pci_get_byte(s->dev.config + offset + PCI_EXP_FLAGS);
+ return (flags & PCI_EXP_FLAGS_TYPE) >> 4;
+}
+
+/* initialize Link Control register */
+static int pt_linkctrl_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ uint8_t cap_ver = get_capability_version(s, real_offset - reg->offset);
+ uint8_t dev_type = get_device_type(s, real_offset - reg->offset);
+
+ /* 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)) {
+ *data = PT_INVALID_REG;
+ }
+
+ *data = reg->init_val;
+ return 0;
+}
+/* initialize Device Control 2 register */
+static int pt_devctrl2_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ uint8_t cap_ver = get_capability_version(s, real_offset - reg->offset);
+
+ /* no need to initialize in case of cap_ver 1.x */
+ if (cap_ver == 1) {
+ *data = PT_INVALID_REG;
+ }
+
+ *data = reg->init_val;
+ return 0;
+}
+/* initialize Link Control 2 register */
+static int pt_linkctrl2_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ uint8_t cap_ver = get_capability_version(s, real_offset - reg->offset);
+ uint32_t reg_field = 0;
+
+ /* no need to initialize in case of cap_ver 1.x */
+ if (cap_ver == 1) {
+ reg_field = PT_INVALID_REG;
+ } else {
+ /* set Supported Link Speed */
+ uint8_t lnkcap = pci_get_byte(s->dev.config + real_offset - reg->offset
+ + PCI_EXP_LNKCAP);
+ reg_field |= PCI_EXP_LNKCAP_SLS & lnkcap;
+ }
+
+ *data = reg_field;
+ return 0;
+}
+
+/* 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,
+ },
+};
+
+
+/****************************
+ * Capabilities
+ */
+
+/* capability structure register group size functions */
+
+static int pt_reg_grp_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset, uint8_t *size)
+{
+ *size = grp_reg->grp_size;
+ return 0;
+}
+/* get Vendor Specific Capability Structure register group size */
+static int pt_vendor_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset, uint8_t *size)
+{
+ *size = pci_get_byte(s->dev.config + base_offset + 0x02);
+ return 0;
+}
+/* get PCI Express Capability Structure register group size */
+static int pt_pcie_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset, uint8_t *size)
+{
+ PCIDevice *d = &s->dev;
+ uint8_t version = get_capability_version(s, base_offset);
+ uint8_t type = get_device_type(s, base_offset);
+ uint8_t pcie_size = 0;
+
+
+ /* 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:
+ PT_ERR(d, "Unsupported device/port type %#x.\n", type);
+ return -1;
+ }
+ }
+ /* 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:
+ PT_ERR(d, "Unsupported device/port type %#x.\n", type);
+ return -1;
+ }
+ } else {
+ PT_ERR(d, "Unsupported capability version %#x.\n", version);
+ return -1;
+ }
+
+ *size = pcie_size;
+ return 0;
+}
+
+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,
+ },
+ /* 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,
+ },
+ /* 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,
+ },
+ {
+ .grp_size = 0,
+ },
+};
+
+/* initialize Capabilities Pointer or Next Pointer register */
+static int pt_ptr_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ int i;
+ uint8_t *config = s->dev.config;
+ uint32_t reg_field = pci_get_byte(config + real_offset);
+ uint8_t cap_id = 0;
+
+ /* 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;
+ }
+
+ cap_id = pci_get_byte(config + reg_field + PCI_CAP_LIST_ID);
+ if (pt_emu_reg_grp_tbl[i].grp_id == cap_id) {
+ 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 = pci_get_byte(config + reg_field + PCI_CAP_LIST_NEXT);
+ }
+
+out:
+ *data = reg_field;
+ return 0;
+}
+
+
+/*************
+ * Main
+ */
+
+static uint8_t find_cap_offset(XenPCIPassthroughState *s, uint8_t cap)
+{
+ uint8_t id;
+ unsigned max_cap = PCI_CAP_MAX;
+ uint8_t pos = PCI_CAPABILITY_LIST;
+ uint8_t status = 0;
+
+ if (host_pci_get_byte(s->real_device, PCI_STATUS, &status)) {
+ return 0;
+ }
+ if ((status & PCI_STATUS_CAP_LIST) == 0) {
+ return 0;
+ }
+
+ while (max_cap--) {
+ if (host_pci_get_byte(s->real_device, pos, &pos)) {
+ break;
+ }
+ if (pos < PCI_CONFIG_HEADER_SIZE) {
+ break;
+ }
+
+ pos &= ~3;
+ if (host_pci_get_byte(s->real_device, pos + PCI_CAP_LIST_ID, &id)) {
+ break;
+ }
+
+ if (id == 0xff) {
+ break;
+ }
+ if (id == cap) {
+ return pos;
+ }
+
+ pos += PCI_CAP_LIST_NEXT;
+ }
+ return 0;
+}
+
+static int pt_config_reg_init(XenPCIPassthroughState *s,
+ XenPTRegGroup *reg_grp, XenPTRegInfo *reg)
+{
+ XenPTReg *reg_entry;
+ uint32_t data = 0;
+ int rc = 0;
+
+ reg_entry = g_new0(XenPTReg, 1);
+ reg_entry->reg = reg;
+
+ if (reg->init) {
+ /* initialize emulate register */
+ rc = reg->init(s, reg_entry->reg,
+ reg_grp->base_offset + reg->offset, &data);
+ if (rc < 0) {
+ free(reg_entry);
+ return rc;
+ }
+ if (data == PT_INVALID_REG) {
+ /* free unused BAR register entry */
+ free(reg_entry);
+ return 0;
+ }
+ /* set register value */
+ reg_entry->data = data;
+ }
+ /* list add register entry */
+ QLIST_INSERT_HEAD(®_grp->reg_tbl_list, reg_entry, entries);
+
+ return 0;
+}
+
+int pt_config_init(XenPCIPassthroughState *s)
+{
+ int i, rc;
+
+ QLIST_INIT(&s->reg_grp_tbl);
+
+ for (i = 0; pt_emu_reg_grp_tbl[i].grp_size != 0; i++) {
+ uint32_t reg_grp_offset = 0;
+ XenPTRegGroup *reg_grp_entry = NULL;
+
+ 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_new0(XenPTRegGroup, 1);
+ 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 */
+ rc = pt_emu_reg_grp_tbl[i].size_init(s, reg_grp_entry->reg_grp,
+ reg_grp_offset,
+ ®_grp_entry->size);
+ if (rc < 0) {
+ pt_config_delete(s);
+ return rc;
+ }
+ }
+
+ if (pt_emu_reg_grp_tbl[i].grp_type == GRP_TYPE_EMU) {
+ if (pt_emu_reg_grp_tbl[i].emu_reg_tbl) {
+ int j = 0;
+ XenPTRegInfo *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 */
+ rc = pt_config_reg_init(s, reg_grp_entry, reg_tbl);
+ if (rc < 0) {
+ pt_config_delete(s);
+ return rc;
+ }
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+/* delete all emulate register */
+void pt_config_delete(XenPCIPassthroughState *s)
+{
+ struct XenPTRegGroup *reg_group, *next_grp;
+ struct XenPTReg *reg, *next_reg;
+
+ /* free all register group entry */
+ QLIST_FOREACH_SAFE(reg_group, &s->reg_grp_tbl, entries, next_grp) {
+ /* free all register entry */
+ QLIST_FOREACH_SAFE(reg, ®_group->reg_tbl_list, entries, next_reg) {
+ QLIST_REMOVE(reg, entries);
+ g_free(reg);
+ }
+
+ QLIST_REMOVE(reg_group, entries);
+ g_free(reg_group);
+ }
+}
--
Anthony PERARD
- [Qemu-devel] [PATCH V6 04/11] configure: Introduce --enable-xen-pci-passthrough., (continued)
- [Qemu-devel] [PATCH V6 04/11] configure: Introduce --enable-xen-pci-passthrough., Anthony PERARD, 2012/02/13
- [Qemu-devel] [PATCH V6 01/11] pci_ids: Add INTEL_82599_VF id., Anthony PERARD, 2012/02/13
- [Qemu-devel] [PATCH V6 03/11] pci_regs: Add PCI_EXP_TYPE_PCIE_BRIDGE, Anthony PERARD, 2012/02/13
- [Qemu-devel] [PATCH V6 05/11] Introduce HostPCIDevice to access a pci device on the host., Anthony PERARD, 2012/02/13
- [Qemu-devel] [PATCH V6 06/11] pci.c: Add pci_check_bar_overlap, Anthony PERARD, 2012/02/13
- [Qemu-devel] [PATCH V6 09/11] Introduce apic-msidef.h, Anthony PERARD, 2012/02/13
- [Qemu-devel] [PATCH V6 07/11] Introduce Xen PCI Passthrough, qdevice (1/3), Anthony PERARD, 2012/02/13
- [Qemu-devel] [PATCH V6 11/11] pci: Do not check if a bus exist in pci_parse_devaddr., Anthony PERARD, 2012/02/13
- [Qemu-devel] [PATCH V6 08/11] Introduce Xen PCI Passthrough, PCI config space helpers (2/3),
Anthony PERARD <=
- [Qemu-devel] [PATCH V6 10/11] Introduce Xen PCI Passthrough, MSI (3/3), Anthony PERARD, 2012/02/13