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2120 lines
66 KiB
C
2120 lines
66 KiB
C
/*
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* Copyright (c) 2007, Neocleus Corporation.
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* Copyright (c) 2007, Intel Corporation.
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Alex Novik <alex@neocleus.com>
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* Allen Kay <allen.m.kay@intel.com>
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* Guy Zana <guy@neocleus.com>
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*
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* This file implements direct PCI assignment to a HVM guest
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qemu/timer.h"
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#include "hw/xen/xen_pt.h"
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#include "hw/xen/xen_igd.h"
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#include "hw/xen/xen-legacy-backend.h"
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#define XEN_PT_MERGE_VALUE(value, data, val_mask) \
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(((value) & (val_mask)) | ((data) & ~(val_mask)))
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#define XEN_PT_INVALID_REG 0xFFFFFFFF /* invalid register value */
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/* prototype */
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static int xen_pt_ptr_reg_init(XenPCIPassthroughState *s, XenPTRegInfo *reg,
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uint32_t real_offset, uint32_t *data);
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/* helper */
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/* A return value of 1 means the capability should NOT be exposed to guest. */
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static int xen_pt_hide_dev_cap(const XenHostPCIDevice *d, uint8_t grp_id)
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{
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switch (grp_id) {
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case PCI_CAP_ID_EXP:
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/* The PCI Express Capability Structure of the VF of Intel 82599 10GbE
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* Controller looks trivial, e.g., the PCI Express Capabilities
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* Register is 0. We should not try to expose it to guest.
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*
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* The datasheet is available at
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* http://download.intel.com/design/network/datashts/82599_datasheet.pdf
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*
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* See 'Table 9.7. VF PCIe Configuration Space' of the datasheet, the
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* PCI Express Capability Structure of the VF of Intel 82599 10GbE
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* Controller looks trivial, e.g., the PCI Express Capabilities
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* Register is 0, so the Capability Version is 0 and
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* xen_pt_pcie_size_init() would fail.
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*/
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if (d->vendor_id == PCI_VENDOR_ID_INTEL &&
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d->device_id == PCI_DEVICE_ID_INTEL_82599_SFP_VF) {
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return 1;
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}
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break;
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}
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return 0;
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}
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/* find emulate register group entry */
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XenPTRegGroup *xen_pt_find_reg_grp(XenPCIPassthroughState *s, uint32_t address)
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{
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XenPTRegGroup *entry = NULL;
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/* find register group entry */
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QLIST_FOREACH(entry, &s->reg_grps, entries) {
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/* check address */
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if ((entry->base_offset <= address)
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&& ((entry->base_offset + entry->size) > address)) {
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return entry;
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}
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}
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/* group entry not found */
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return NULL;
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}
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/* find emulate register entry */
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XenPTReg *xen_pt_find_reg(XenPTRegGroup *reg_grp, uint32_t address)
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{
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XenPTReg *reg_entry = NULL;
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XenPTRegInfo *reg = NULL;
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uint32_t real_offset = 0;
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/* find register entry */
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QLIST_FOREACH(reg_entry, ®_grp->reg_tbl_list, entries) {
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reg = reg_entry->reg;
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real_offset = reg_grp->base_offset + reg->offset;
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/* check address */
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if ((real_offset <= address)
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&& ((real_offset + reg->size) > address)) {
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return reg_entry;
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}
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}
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return NULL;
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}
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static uint32_t get_throughable_mask(const XenPCIPassthroughState *s,
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XenPTRegInfo *reg, uint32_t valid_mask)
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{
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uint32_t throughable_mask = ~(reg->emu_mask | reg->ro_mask);
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if (!s->permissive) {
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throughable_mask &= ~reg->res_mask;
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}
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return throughable_mask & valid_mask;
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}
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/****************
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* general register functions
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*/
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/* register initialization function */
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static int xen_pt_common_reg_init(XenPCIPassthroughState *s,
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XenPTRegInfo *reg, uint32_t real_offset,
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uint32_t *data)
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{
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*data = reg->init_val;
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return 0;
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}
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/* Read register functions */
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static int xen_pt_byte_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
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uint8_t *value, uint8_t valid_mask)
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{
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XenPTRegInfo *reg = cfg_entry->reg;
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uint8_t valid_emu_mask = 0;
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uint8_t *data = cfg_entry->ptr.byte;
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/* emulate byte register */
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valid_emu_mask = reg->emu_mask & valid_mask;
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*value = XEN_PT_MERGE_VALUE(*value, *data, ~valid_emu_mask);
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return 0;
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}
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static int xen_pt_word_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
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uint16_t *value, uint16_t valid_mask)
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{
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XenPTRegInfo *reg = cfg_entry->reg;
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uint16_t valid_emu_mask = 0;
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uint16_t *data = cfg_entry->ptr.half_word;
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/* emulate word register */
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valid_emu_mask = reg->emu_mask & valid_mask;
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*value = XEN_PT_MERGE_VALUE(*value, *data, ~valid_emu_mask);
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return 0;
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}
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static int xen_pt_long_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
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uint32_t *value, uint32_t valid_mask)
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{
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XenPTRegInfo *reg = cfg_entry->reg;
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uint32_t valid_emu_mask = 0;
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uint32_t *data = cfg_entry->ptr.word;
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/* emulate long register */
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valid_emu_mask = reg->emu_mask & valid_mask;
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*value = XEN_PT_MERGE_VALUE(*value, *data, ~valid_emu_mask);
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return 0;
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}
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/* Write register functions */
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static int xen_pt_byte_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
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uint8_t *val, uint8_t dev_value,
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uint8_t valid_mask)
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{
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XenPTRegInfo *reg = cfg_entry->reg;
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uint8_t writable_mask = 0;
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uint8_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
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uint8_t *data = cfg_entry->ptr.byte;
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/* modify emulate register */
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writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
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*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
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/* create value for writing to I/O device register */
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*val = XEN_PT_MERGE_VALUE(*val, dev_value & ~reg->rw1c_mask,
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throughable_mask);
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return 0;
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}
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static int xen_pt_word_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
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uint16_t *val, uint16_t dev_value,
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uint16_t valid_mask)
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{
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XenPTRegInfo *reg = cfg_entry->reg;
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uint16_t writable_mask = 0;
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uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
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uint16_t *data = cfg_entry->ptr.half_word;
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/* modify emulate register */
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writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
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*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
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/* create value for writing to I/O device register */
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*val = XEN_PT_MERGE_VALUE(*val, dev_value & ~reg->rw1c_mask,
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throughable_mask);
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return 0;
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}
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static int xen_pt_long_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
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uint32_t *val, uint32_t dev_value,
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uint32_t valid_mask)
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{
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XenPTRegInfo *reg = cfg_entry->reg;
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uint32_t writable_mask = 0;
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uint32_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
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uint32_t *data = cfg_entry->ptr.word;
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/* modify emulate register */
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writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
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*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
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/* create value for writing to I/O device register */
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*val = XEN_PT_MERGE_VALUE(*val, dev_value & ~reg->rw1c_mask,
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throughable_mask);
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return 0;
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}
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/* XenPTRegInfo declaration
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* - only for emulated register (either a part or whole bit).
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* - for passthrough register that need special behavior (like interacting with
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* other component), set emu_mask to all 0 and specify r/w func properly.
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* - do NOT use ALL F for init_val, otherwise the tbl will not be registered.
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*/
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/********************
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* Header Type0
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*/
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static int xen_pt_vendor_reg_init(XenPCIPassthroughState *s,
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XenPTRegInfo *reg, uint32_t real_offset,
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uint32_t *data)
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{
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*data = s->real_device.vendor_id;
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return 0;
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}
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static int xen_pt_device_reg_init(XenPCIPassthroughState *s,
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XenPTRegInfo *reg, uint32_t real_offset,
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uint32_t *data)
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{
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*data = s->real_device.device_id;
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return 0;
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}
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static int xen_pt_status_reg_init(XenPCIPassthroughState *s,
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XenPTRegInfo *reg, uint32_t real_offset,
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uint32_t *data)
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{
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XenPTRegGroup *reg_grp_entry = NULL;
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XenPTReg *reg_entry = NULL;
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uint32_t reg_field = 0;
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/* find Header register group */
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reg_grp_entry = xen_pt_find_reg_grp(s, PCI_CAPABILITY_LIST);
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if (reg_grp_entry) {
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/* find Capabilities Pointer register */
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reg_entry = xen_pt_find_reg(reg_grp_entry, PCI_CAPABILITY_LIST);
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if (reg_entry) {
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/* check Capabilities Pointer register */
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if (*reg_entry->ptr.half_word) {
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reg_field |= PCI_STATUS_CAP_LIST;
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} else {
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reg_field &= ~PCI_STATUS_CAP_LIST;
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}
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} else {
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xen_shutdown_fatal_error("Internal error: Couldn't find XenPTReg*"
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" for Capabilities Pointer register."
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" (%s)\n", __func__);
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return -1;
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}
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} else {
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xen_shutdown_fatal_error("Internal error: Couldn't find XenPTRegGroup"
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" for Header. (%s)\n", __func__);
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return -1;
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}
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*data = reg_field;
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return 0;
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}
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static int xen_pt_header_type_reg_init(XenPCIPassthroughState *s,
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XenPTRegInfo *reg, uint32_t real_offset,
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uint32_t *data)
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{
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/* read PCI_HEADER_TYPE */
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*data = reg->init_val;
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if ((PCI_DEVICE(s)->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) {
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*data |= PCI_HEADER_TYPE_MULTI_FUNCTION;
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}
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return 0;
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}
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/* initialize Interrupt Pin register */
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static int xen_pt_irqpin_reg_init(XenPCIPassthroughState *s,
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XenPTRegInfo *reg, uint32_t real_offset,
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uint32_t *data)
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{
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if (s->real_device.irq) {
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*data = xen_pt_pci_read_intx(s);
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}
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return 0;
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}
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/* Command register */
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static int xen_pt_cmd_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
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uint16_t *val, uint16_t dev_value,
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uint16_t valid_mask)
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{
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XenPTRegInfo *reg = cfg_entry->reg;
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uint16_t writable_mask = 0;
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uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
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uint16_t *data = cfg_entry->ptr.half_word;
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/* modify emulate register */
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writable_mask = ~reg->ro_mask & valid_mask;
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*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
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/* create value for writing to I/O device register */
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if (*val & PCI_COMMAND_INTX_DISABLE) {
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throughable_mask |= PCI_COMMAND_INTX_DISABLE;
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} else {
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if (s->machine_irq) {
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throughable_mask |= PCI_COMMAND_INTX_DISABLE;
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}
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}
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*val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
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return 0;
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}
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/* BAR */
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#define XEN_PT_BAR_MEM_RO_MASK 0x0000000F /* BAR ReadOnly mask(Memory) */
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#define XEN_PT_BAR_MEM_EMU_MASK 0xFFFFFFF0 /* BAR emul mask(Memory) */
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#define XEN_PT_BAR_IO_RO_MASK 0x00000003 /* BAR ReadOnly mask(I/O) */
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#define XEN_PT_BAR_IO_EMU_MASK 0xFFFFFFFC /* BAR emul mask(I/O) */
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static bool is_64bit_bar(PCIIORegion *r)
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{
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return !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64);
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}
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static uint64_t xen_pt_get_bar_size(PCIIORegion *r)
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{
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if (is_64bit_bar(r)) {
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uint64_t size64;
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size64 = (r + 1)->size;
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size64 <<= 32;
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size64 += r->size;
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return size64;
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}
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return r->size;
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}
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static XenPTBarFlag xen_pt_bar_reg_parse(XenPCIPassthroughState *s,
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int index)
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{
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PCIDevice *d = PCI_DEVICE(s);
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XenPTRegion *region = NULL;
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PCIIORegion *r;
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/* check 64bit BAR */
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if ((0 < index) && (index < PCI_ROM_SLOT)) {
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int type = s->real_device.io_regions[index - 1].type;
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if ((type & XEN_HOST_PCI_REGION_TYPE_MEM)
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&& (type & XEN_HOST_PCI_REGION_TYPE_MEM_64)) {
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region = &s->bases[index - 1];
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if (region->bar_flag != XEN_PT_BAR_FLAG_UPPER) {
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return XEN_PT_BAR_FLAG_UPPER;
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}
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}
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}
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/* check unused BAR */
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r = &d->io_regions[index];
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if (!xen_pt_get_bar_size(r)) {
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return XEN_PT_BAR_FLAG_UNUSED;
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}
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/* for ExpROM BAR */
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if (index == PCI_ROM_SLOT) {
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return XEN_PT_BAR_FLAG_MEM;
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}
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/* check BAR I/O indicator */
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if (s->real_device.io_regions[index].type & XEN_HOST_PCI_REGION_TYPE_IO) {
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return XEN_PT_BAR_FLAG_IO;
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} else {
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return XEN_PT_BAR_FLAG_MEM;
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}
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}
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static inline uint32_t base_address_with_flags(XenHostPCIIORegion *hr)
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{
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if (hr->type & XEN_HOST_PCI_REGION_TYPE_IO) {
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return hr->base_addr | (hr->bus_flags & ~PCI_BASE_ADDRESS_IO_MASK);
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} else {
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return hr->base_addr | (hr->bus_flags & ~PCI_BASE_ADDRESS_MEM_MASK);
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}
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}
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static int xen_pt_bar_reg_init(XenPCIPassthroughState *s, XenPTRegInfo *reg,
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uint32_t real_offset, uint32_t *data)
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{
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uint32_t reg_field = 0;
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int index;
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index = xen_pt_bar_offset_to_index(reg->offset);
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if (index < 0 || index >= PCI_NUM_REGIONS) {
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XEN_PT_ERR(&s->dev, "Internal error: Invalid BAR index [%d].\n", index);
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return -1;
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}
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/* set BAR flag */
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s->bases[index].bar_flag = xen_pt_bar_reg_parse(s, index);
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if (s->bases[index].bar_flag == XEN_PT_BAR_FLAG_UNUSED) {
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reg_field = XEN_PT_INVALID_REG;
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}
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*data = reg_field;
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return 0;
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}
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static int xen_pt_bar_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
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uint32_t *value, uint32_t valid_mask)
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{
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XenPTRegInfo *reg = cfg_entry->reg;
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uint32_t valid_emu_mask = 0;
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uint32_t bar_emu_mask = 0;
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int index;
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/* get BAR index */
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index = xen_pt_bar_offset_to_index(reg->offset);
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if (index < 0 || index >= PCI_NUM_REGIONS - 1) {
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XEN_PT_ERR(&s->dev, "Internal error: Invalid BAR index [%d].\n", index);
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return -1;
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}
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/* use fixed-up value from kernel sysfs */
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*value = base_address_with_flags(&s->real_device.io_regions[index]);
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/* set emulate mask depend on BAR flag */
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switch (s->bases[index].bar_flag) {
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case XEN_PT_BAR_FLAG_MEM:
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bar_emu_mask = XEN_PT_BAR_MEM_EMU_MASK;
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break;
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case XEN_PT_BAR_FLAG_IO:
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bar_emu_mask = XEN_PT_BAR_IO_EMU_MASK;
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break;
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case XEN_PT_BAR_FLAG_UPPER:
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bar_emu_mask = XEN_PT_BAR_ALLF;
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break;
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default:
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break;
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}
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/* emulate BAR */
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valid_emu_mask = bar_emu_mask & valid_mask;
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*value = XEN_PT_MERGE_VALUE(*value, *cfg_entry->ptr.word, ~valid_emu_mask);
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return 0;
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}
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static int xen_pt_bar_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
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uint32_t *val, uint32_t dev_value,
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uint32_t valid_mask)
|
|
{
|
|
XenPTRegInfo *reg = cfg_entry->reg;
|
|
XenPTRegion *base = NULL;
|
|
PCIDevice *d = PCI_DEVICE(s);
|
|
const PCIIORegion *r;
|
|
uint32_t writable_mask = 0;
|
|
uint32_t bar_emu_mask = 0;
|
|
uint32_t bar_ro_mask = 0;
|
|
uint32_t r_size = 0;
|
|
int index = 0;
|
|
uint32_t *data = cfg_entry->ptr.word;
|
|
|
|
index = xen_pt_bar_offset_to_index(reg->offset);
|
|
if (index < 0 || index >= PCI_NUM_REGIONS) {
|
|
XEN_PT_ERR(d, "Internal error: Invalid BAR index [%d].\n", index);
|
|
return -1;
|
|
}
|
|
|
|
r = &d->io_regions[index];
|
|
base = &s->bases[index];
|
|
r_size = xen_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 XEN_PT_BAR_FLAG_MEM:
|
|
bar_emu_mask = XEN_PT_BAR_MEM_EMU_MASK;
|
|
if (!r_size) {
|
|
/* low 32 bits mask for 64 bit bars */
|
|
bar_ro_mask = XEN_PT_BAR_ALLF;
|
|
} else {
|
|
bar_ro_mask = XEN_PT_BAR_MEM_RO_MASK | (r_size - 1);
|
|
}
|
|
break;
|
|
case XEN_PT_BAR_FLAG_IO:
|
|
bar_emu_mask = XEN_PT_BAR_IO_EMU_MASK;
|
|
bar_ro_mask = XEN_PT_BAR_IO_RO_MASK | (r_size - 1);
|
|
break;
|
|
case XEN_PT_BAR_FLAG_UPPER:
|
|
assert(index > 0);
|
|
r_size = d->io_regions[index - 1].size >> 32;
|
|
bar_emu_mask = XEN_PT_BAR_ALLF;
|
|
bar_ro_mask = r_size ? r_size - 1 : 0;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* modify emulate register */
|
|
writable_mask = bar_emu_mask & ~bar_ro_mask & valid_mask;
|
|
*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
|
|
|
|
/* check whether we need to update the virtual region address or not */
|
|
switch (s->bases[index].bar_flag) {
|
|
case XEN_PT_BAR_FLAG_UPPER:
|
|
case XEN_PT_BAR_FLAG_MEM:
|
|
/* nothing to do */
|
|
break;
|
|
case XEN_PT_BAR_FLAG_IO:
|
|
/* nothing to do */
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* create value for writing to I/O device register */
|
|
*val = XEN_PT_MERGE_VALUE(*val, dev_value, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* write Exp ROM BAR */
|
|
static int xen_pt_exp_rom_bar_reg_write(XenPCIPassthroughState *s,
|
|
XenPTReg *cfg_entry, uint32_t *val,
|
|
uint32_t dev_value, uint32_t valid_mask)
|
|
{
|
|
XenPTRegInfo *reg = cfg_entry->reg;
|
|
XenPTRegion *base = NULL;
|
|
PCIDevice *d = PCI_DEVICE(s);
|
|
uint32_t writable_mask = 0;
|
|
uint32_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
|
|
pcibus_t r_size = 0;
|
|
uint32_t bar_ro_mask = 0;
|
|
uint32_t *data = cfg_entry->ptr.word;
|
|
|
|
r_size = d->io_regions[PCI_ROM_SLOT].size;
|
|
base = &s->bases[PCI_ROM_SLOT];
|
|
/* align memory type resource size */
|
|
r_size = xen_pt_get_emul_size(base->bar_flag, r_size);
|
|
|
|
/* set emulate mask and read-only mask */
|
|
bar_ro_mask = (reg->ro_mask | (r_size - 1)) & ~PCI_ROM_ADDRESS_ENABLE;
|
|
|
|
/* modify emulate register */
|
|
writable_mask = ~bar_ro_mask & valid_mask;
|
|
*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
|
|
|
|
/* create value for writing to I/O device register */
|
|
*val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xen_pt_intel_opregion_read(XenPCIPassthroughState *s,
|
|
XenPTReg *cfg_entry,
|
|
uint32_t *value, uint32_t valid_mask)
|
|
{
|
|
*value = igd_read_opregion(s);
|
|
return 0;
|
|
}
|
|
|
|
static int xen_pt_intel_opregion_write(XenPCIPassthroughState *s,
|
|
XenPTReg *cfg_entry, uint32_t *value,
|
|
uint32_t dev_value, uint32_t valid_mask)
|
|
{
|
|
igd_write_opregion(s, *value);
|
|
return 0;
|
|
}
|
|
|
|
/* Header Type0 reg static information table */
|
|
static XenPTRegInfo xen_pt_emu_reg_header0[] = {
|
|
/* Vendor ID reg */
|
|
{
|
|
.offset = PCI_VENDOR_ID,
|
|
.size = 2,
|
|
.init_val = 0x0000,
|
|
.ro_mask = 0xFFFF,
|
|
.emu_mask = 0xFFFF,
|
|
.init = xen_pt_vendor_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_word_reg_write,
|
|
},
|
|
/* Device ID reg */
|
|
{
|
|
.offset = PCI_DEVICE_ID,
|
|
.size = 2,
|
|
.init_val = 0x0000,
|
|
.ro_mask = 0xFFFF,
|
|
.emu_mask = 0xFFFF,
|
|
.init = xen_pt_device_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_word_reg_write,
|
|
},
|
|
/* Command reg */
|
|
{
|
|
.offset = PCI_COMMAND,
|
|
.size = 2,
|
|
.init_val = 0x0000,
|
|
.res_mask = 0xF880,
|
|
.emu_mask = 0x0743,
|
|
.init = xen_pt_common_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_cmd_reg_write,
|
|
},
|
|
/* Capabilities Pointer reg */
|
|
{
|
|
.offset = PCI_CAPABILITY_LIST,
|
|
.size = 1,
|
|
.init_val = 0x00,
|
|
.ro_mask = 0xFF,
|
|
.emu_mask = 0xFF,
|
|
.init = xen_pt_ptr_reg_init,
|
|
.u.b.read = xen_pt_byte_reg_read,
|
|
.u.b.write = xen_pt_byte_reg_write,
|
|
},
|
|
/* 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,
|
|
.res_mask = 0x0007,
|
|
.ro_mask = 0x06F8,
|
|
.rw1c_mask = 0xF900,
|
|
.emu_mask = 0x0010,
|
|
.init = xen_pt_status_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_word_reg_write,
|
|
},
|
|
/* Cache Line Size reg */
|
|
{
|
|
.offset = PCI_CACHE_LINE_SIZE,
|
|
.size = 1,
|
|
.init_val = 0x00,
|
|
.ro_mask = 0x00,
|
|
.emu_mask = 0xFF,
|
|
.init = xen_pt_common_reg_init,
|
|
.u.b.read = xen_pt_byte_reg_read,
|
|
.u.b.write = xen_pt_byte_reg_write,
|
|
},
|
|
/* Latency Timer reg */
|
|
{
|
|
.offset = PCI_LATENCY_TIMER,
|
|
.size = 1,
|
|
.init_val = 0x00,
|
|
.ro_mask = 0x00,
|
|
.emu_mask = 0xFF,
|
|
.init = xen_pt_common_reg_init,
|
|
.u.b.read = xen_pt_byte_reg_read,
|
|
.u.b.write = xen_pt_byte_reg_write,
|
|
},
|
|
/* Header Type reg */
|
|
{
|
|
.offset = PCI_HEADER_TYPE,
|
|
.size = 1,
|
|
.init_val = 0x00,
|
|
.ro_mask = 0xFF,
|
|
.emu_mask = PCI_HEADER_TYPE_MULTI_FUNCTION,
|
|
.init = xen_pt_header_type_reg_init,
|
|
.u.b.read = xen_pt_byte_reg_read,
|
|
.u.b.write = xen_pt_byte_reg_write,
|
|
},
|
|
/* Interrupt Line reg */
|
|
{
|
|
.offset = PCI_INTERRUPT_LINE,
|
|
.size = 1,
|
|
.init_val = 0x00,
|
|
.ro_mask = 0x00,
|
|
.emu_mask = 0xFF,
|
|
.init = xen_pt_common_reg_init,
|
|
.u.b.read = xen_pt_byte_reg_read,
|
|
.u.b.write = xen_pt_byte_reg_write,
|
|
},
|
|
/* Interrupt Pin reg */
|
|
{
|
|
.offset = PCI_INTERRUPT_PIN,
|
|
.size = 1,
|
|
.init_val = 0x00,
|
|
.ro_mask = 0xFF,
|
|
.emu_mask = 0xFF,
|
|
.init = xen_pt_irqpin_reg_init,
|
|
.u.b.read = xen_pt_byte_reg_read,
|
|
.u.b.write = xen_pt_byte_reg_write,
|
|
},
|
|
/* 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 = xen_pt_bar_reg_init,
|
|
.u.dw.read = xen_pt_bar_reg_read,
|
|
.u.dw.write = xen_pt_bar_reg_write,
|
|
},
|
|
/* BAR 1 reg */
|
|
{
|
|
.offset = PCI_BASE_ADDRESS_1,
|
|
.size = 4,
|
|
.init_val = 0x00000000,
|
|
.init = xen_pt_bar_reg_init,
|
|
.u.dw.read = xen_pt_bar_reg_read,
|
|
.u.dw.write = xen_pt_bar_reg_write,
|
|
},
|
|
/* BAR 2 reg */
|
|
{
|
|
.offset = PCI_BASE_ADDRESS_2,
|
|
.size = 4,
|
|
.init_val = 0x00000000,
|
|
.init = xen_pt_bar_reg_init,
|
|
.u.dw.read = xen_pt_bar_reg_read,
|
|
.u.dw.write = xen_pt_bar_reg_write,
|
|
},
|
|
/* BAR 3 reg */
|
|
{
|
|
.offset = PCI_BASE_ADDRESS_3,
|
|
.size = 4,
|
|
.init_val = 0x00000000,
|
|
.init = xen_pt_bar_reg_init,
|
|
.u.dw.read = xen_pt_bar_reg_read,
|
|
.u.dw.write = xen_pt_bar_reg_write,
|
|
},
|
|
/* BAR 4 reg */
|
|
{
|
|
.offset = PCI_BASE_ADDRESS_4,
|
|
.size = 4,
|
|
.init_val = 0x00000000,
|
|
.init = xen_pt_bar_reg_init,
|
|
.u.dw.read = xen_pt_bar_reg_read,
|
|
.u.dw.write = xen_pt_bar_reg_write,
|
|
},
|
|
/* BAR 5 reg */
|
|
{
|
|
.offset = PCI_BASE_ADDRESS_5,
|
|
.size = 4,
|
|
.init_val = 0x00000000,
|
|
.init = xen_pt_bar_reg_init,
|
|
.u.dw.read = xen_pt_bar_reg_read,
|
|
.u.dw.write = xen_pt_bar_reg_write,
|
|
},
|
|
/* Expansion ROM BAR reg */
|
|
{
|
|
.offset = PCI_ROM_ADDRESS,
|
|
.size = 4,
|
|
.init_val = 0x00000000,
|
|
.ro_mask = ~PCI_ROM_ADDRESS_MASK & ~PCI_ROM_ADDRESS_ENABLE,
|
|
.emu_mask = (uint32_t)PCI_ROM_ADDRESS_MASK,
|
|
.init = xen_pt_bar_reg_init,
|
|
.u.dw.read = xen_pt_long_reg_read,
|
|
.u.dw.write = xen_pt_exp_rom_bar_reg_write,
|
|
},
|
|
{
|
|
.size = 0,
|
|
},
|
|
};
|
|
|
|
|
|
/*********************************
|
|
* Vital Product Data Capability
|
|
*/
|
|
|
|
/* Vital Product Data Capability Structure reg static information table */
|
|
static XenPTRegInfo xen_pt_emu_reg_vpd[] = {
|
|
{
|
|
.offset = PCI_CAP_LIST_NEXT,
|
|
.size = 1,
|
|
.init_val = 0x00,
|
|
.ro_mask = 0xFF,
|
|
.emu_mask = 0xFF,
|
|
.init = xen_pt_ptr_reg_init,
|
|
.u.b.read = xen_pt_byte_reg_read,
|
|
.u.b.write = xen_pt_byte_reg_write,
|
|
},
|
|
{
|
|
.offset = PCI_VPD_ADDR,
|
|
.size = 2,
|
|
.ro_mask = 0x0003,
|
|
.emu_mask = 0x0003,
|
|
.init = xen_pt_common_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_word_reg_write,
|
|
},
|
|
{
|
|
.size = 0,
|
|
},
|
|
};
|
|
|
|
|
|
/**************************************
|
|
* Vendor Specific Capability
|
|
*/
|
|
|
|
/* Vendor Specific Capability Structure reg static information table */
|
|
static XenPTRegInfo xen_pt_emu_reg_vendor[] = {
|
|
{
|
|
.offset = PCI_CAP_LIST_NEXT,
|
|
.size = 1,
|
|
.init_val = 0x00,
|
|
.ro_mask = 0xFF,
|
|
.emu_mask = 0xFF,
|
|
.init = xen_pt_ptr_reg_init,
|
|
.u.b.read = xen_pt_byte_reg_read,
|
|
.u.b.write = xen_pt_byte_reg_write,
|
|
},
|
|
{
|
|
.size = 0,
|
|
},
|
|
};
|
|
|
|
|
|
/*****************************
|
|
* PCI Express Capability
|
|
*/
|
|
|
|
static inline uint8_t get_capability_version(XenPCIPassthroughState *s,
|
|
uint32_t offset)
|
|
{
|
|
uint8_t flag;
|
|
if (xen_host_pci_get_byte(&s->real_device, offset + PCI_EXP_FLAGS, &flag)) {
|
|
return 0;
|
|
}
|
|
return flag & PCI_EXP_FLAGS_VERS;
|
|
}
|
|
|
|
static inline uint8_t get_device_type(XenPCIPassthroughState *s,
|
|
uint32_t offset)
|
|
{
|
|
uint8_t flag;
|
|
if (xen_host_pci_get_byte(&s->real_device, offset + PCI_EXP_FLAGS, &flag)) {
|
|
return 0;
|
|
}
|
|
return (flag & PCI_EXP_FLAGS_TYPE) >> 4;
|
|
}
|
|
|
|
/* initialize Link Control register */
|
|
static int xen_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 = XEN_PT_INVALID_REG;
|
|
}
|
|
|
|
*data = reg->init_val;
|
|
return 0;
|
|
}
|
|
/* initialize Device Control 2 register */
|
|
static int xen_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 = XEN_PT_INVALID_REG;
|
|
}
|
|
|
|
*data = reg->init_val;
|
|
return 0;
|
|
}
|
|
/* initialize Link Control 2 register */
|
|
static int xen_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 = XEN_PT_INVALID_REG;
|
|
} else {
|
|
/* set Supported Link Speed */
|
|
uint8_t lnkcap;
|
|
int rc;
|
|
rc = xen_host_pci_get_byte(&s->real_device,
|
|
real_offset - reg->offset + PCI_EXP_LNKCAP,
|
|
&lnkcap);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
reg_field |= PCI_EXP_LNKCAP_SLS & lnkcap;
|
|
}
|
|
|
|
*data = reg_field;
|
|
return 0;
|
|
}
|
|
|
|
/* PCI Express Capability Structure reg static information table */
|
|
static XenPTRegInfo xen_pt_emu_reg_pcie[] = {
|
|
/* Next Pointer reg */
|
|
{
|
|
.offset = PCI_CAP_LIST_NEXT,
|
|
.size = 1,
|
|
.init_val = 0x00,
|
|
.ro_mask = 0xFF,
|
|
.emu_mask = 0xFF,
|
|
.init = xen_pt_ptr_reg_init,
|
|
.u.b.read = xen_pt_byte_reg_read,
|
|
.u.b.write = xen_pt_byte_reg_write,
|
|
},
|
|
/* Device Capabilities reg */
|
|
{
|
|
.offset = PCI_EXP_DEVCAP,
|
|
.size = 4,
|
|
.init_val = 0x00000000,
|
|
.ro_mask = 0xFFFFFFFF,
|
|
.emu_mask = 0x10000000,
|
|
.init = xen_pt_common_reg_init,
|
|
.u.dw.read = xen_pt_long_reg_read,
|
|
.u.dw.write = xen_pt_long_reg_write,
|
|
},
|
|
/* Device Control reg */
|
|
{
|
|
.offset = PCI_EXP_DEVCTL,
|
|
.size = 2,
|
|
.init_val = 0x2810,
|
|
.ro_mask = 0x8400,
|
|
.emu_mask = 0xFFFF,
|
|
.init = xen_pt_common_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_word_reg_write,
|
|
},
|
|
/* Device Status reg */
|
|
{
|
|
.offset = PCI_EXP_DEVSTA,
|
|
.size = 2,
|
|
.res_mask = 0xFFC0,
|
|
.ro_mask = 0x0030,
|
|
.rw1c_mask = 0x000F,
|
|
.init = xen_pt_common_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_word_reg_write,
|
|
},
|
|
/* Link Control reg */
|
|
{
|
|
.offset = PCI_EXP_LNKCTL,
|
|
.size = 2,
|
|
.init_val = 0x0000,
|
|
.ro_mask = 0xFC34,
|
|
.emu_mask = 0xFFFF,
|
|
.init = xen_pt_linkctrl_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_word_reg_write,
|
|
},
|
|
/* Link Status reg */
|
|
{
|
|
.offset = PCI_EXP_LNKSTA,
|
|
.size = 2,
|
|
.ro_mask = 0x3FFF,
|
|
.rw1c_mask = 0xC000,
|
|
.init = xen_pt_common_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_word_reg_write,
|
|
},
|
|
/* Device Control 2 reg */
|
|
{
|
|
.offset = 0x28,
|
|
.size = 2,
|
|
.init_val = 0x0000,
|
|
.ro_mask = 0xFFA0,
|
|
.emu_mask = 0xFFBF,
|
|
.init = xen_pt_devctrl2_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_word_reg_write,
|
|
},
|
|
/* Link Control 2 reg */
|
|
{
|
|
.offset = 0x30,
|
|
.size = 2,
|
|
.init_val = 0x0000,
|
|
.ro_mask = 0xE040,
|
|
.emu_mask = 0xFFFF,
|
|
.init = xen_pt_linkctrl2_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_word_reg_write,
|
|
},
|
|
{
|
|
.size = 0,
|
|
},
|
|
};
|
|
|
|
|
|
/*********************************
|
|
* Power Management Capability
|
|
*/
|
|
|
|
/* Power Management Capability reg static information table */
|
|
static XenPTRegInfo xen_pt_emu_reg_pm[] = {
|
|
/* Next Pointer reg */
|
|
{
|
|
.offset = PCI_CAP_LIST_NEXT,
|
|
.size = 1,
|
|
.init_val = 0x00,
|
|
.ro_mask = 0xFF,
|
|
.emu_mask = 0xFF,
|
|
.init = xen_pt_ptr_reg_init,
|
|
.u.b.read = xen_pt_byte_reg_read,
|
|
.u.b.write = xen_pt_byte_reg_write,
|
|
},
|
|
/* Power Management Capabilities reg */
|
|
{
|
|
.offset = PCI_CAP_FLAGS,
|
|
.size = 2,
|
|
.init_val = 0x0000,
|
|
.ro_mask = 0xFFFF,
|
|
.emu_mask = 0xF9C8,
|
|
.init = xen_pt_common_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_word_reg_write,
|
|
},
|
|
/* PCI Power Management Control/Status reg */
|
|
{
|
|
.offset = PCI_PM_CTRL,
|
|
.size = 2,
|
|
.init_val = 0x0008,
|
|
.res_mask = 0x00F0,
|
|
.ro_mask = 0x610C,
|
|
.rw1c_mask = 0x8000,
|
|
.emu_mask = 0x810B,
|
|
.init = xen_pt_common_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_word_reg_write,
|
|
},
|
|
{
|
|
.size = 0,
|
|
},
|
|
};
|
|
|
|
|
|
/********************************
|
|
* MSI Capability
|
|
*/
|
|
|
|
/* Helper */
|
|
#define xen_pt_msi_check_type(offset, flags, what) \
|
|
((offset) == ((flags) & PCI_MSI_FLAGS_64BIT ? \
|
|
PCI_MSI_##what##_64 : PCI_MSI_##what##_32))
|
|
|
|
/* Message Control register */
|
|
static int xen_pt_msgctrl_reg_init(XenPCIPassthroughState *s,
|
|
XenPTRegInfo *reg, uint32_t real_offset,
|
|
uint32_t *data)
|
|
{
|
|
XenPTMSI *msi = s->msi;
|
|
uint16_t reg_field;
|
|
int rc;
|
|
|
|
/* use I/O device register's value as initial value */
|
|
rc = xen_host_pci_get_word(&s->real_device, real_offset, ®_field);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
if (reg_field & PCI_MSI_FLAGS_ENABLE) {
|
|
XEN_PT_LOG(&s->dev, "MSI already enabled, disabling it first\n");
|
|
xen_host_pci_set_word(&s->real_device, real_offset,
|
|
reg_field & ~PCI_MSI_FLAGS_ENABLE);
|
|
}
|
|
msi->flags |= reg_field;
|
|
msi->ctrl_offset = real_offset;
|
|
msi->initialized = false;
|
|
msi->mapped = false;
|
|
|
|
*data = reg->init_val;
|
|
return 0;
|
|
}
|
|
static int xen_pt_msgctrl_reg_write(XenPCIPassthroughState *s,
|
|
XenPTReg *cfg_entry, uint16_t *val,
|
|
uint16_t dev_value, uint16_t valid_mask)
|
|
{
|
|
XenPTRegInfo *reg = cfg_entry->reg;
|
|
XenPTMSI *msi = s->msi;
|
|
uint16_t writable_mask = 0;
|
|
uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
|
|
uint16_t *data = cfg_entry->ptr.half_word;
|
|
|
|
/* Currently no support for multi-vector */
|
|
if (*val & PCI_MSI_FLAGS_QSIZE) {
|
|
XEN_PT_WARN(&s->dev, "Tries to set more than 1 vector ctrl %x\n", *val);
|
|
}
|
|
|
|
/* modify emulate register */
|
|
writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
|
|
*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
|
|
msi->flags |= *data & ~PCI_MSI_FLAGS_ENABLE;
|
|
|
|
/* create value for writing to I/O device register */
|
|
*val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
|
|
|
|
/* update MSI */
|
|
if (*val & PCI_MSI_FLAGS_ENABLE) {
|
|
/* setup MSI pirq for the first time */
|
|
if (!msi->initialized) {
|
|
/* Init physical one */
|
|
XEN_PT_LOG(&s->dev, "setup MSI (register: %x).\n", *val);
|
|
if (xen_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.
|
|
*/
|
|
*val &= ~PCI_MSI_FLAGS_ENABLE;
|
|
XEN_PT_WARN(&s->dev, "Can not map MSI (register: %x)!\n", *val);
|
|
return 0;
|
|
}
|
|
if (xen_pt_msi_update(s)) {
|
|
*val &= ~PCI_MSI_FLAGS_ENABLE;
|
|
XEN_PT_WARN(&s->dev, "Can not bind MSI (register: %x)!\n", *val);
|
|
return 0;
|
|
}
|
|
msi->initialized = true;
|
|
msi->mapped = true;
|
|
}
|
|
msi->flags |= PCI_MSI_FLAGS_ENABLE;
|
|
} else if (msi->mapped) {
|
|
xen_pt_msi_disable(s);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* initialize Message Upper Address register */
|
|
static int xen_pt_msgaddr64_reg_init(XenPCIPassthroughState *s,
|
|
XenPTRegInfo *reg, uint32_t real_offset,
|
|
uint32_t *data)
|
|
{
|
|
/* no need to initialize in case of 32 bit type */
|
|
if (!(s->msi->flags & PCI_MSI_FLAGS_64BIT)) {
|
|
*data = XEN_PT_INVALID_REG;
|
|
} else {
|
|
*data = reg->init_val;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/* this function will be called twice (for 32 bit and 64 bit type) */
|
|
/* initialize Message Data register */
|
|
static int xen_pt_msgdata_reg_init(XenPCIPassthroughState *s,
|
|
XenPTRegInfo *reg, uint32_t real_offset,
|
|
uint32_t *data)
|
|
{
|
|
uint32_t flags = s->msi->flags;
|
|
uint32_t offset = reg->offset;
|
|
|
|
/* check the offset whether matches the type or not */
|
|
if (xen_pt_msi_check_type(offset, flags, DATA)) {
|
|
*data = reg->init_val;
|
|
} else {
|
|
*data = XEN_PT_INVALID_REG;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* this function will be called twice (for 32 bit and 64 bit type) */
|
|
/* initialize Mask register */
|
|
static int xen_pt_mask_reg_init(XenPCIPassthroughState *s,
|
|
XenPTRegInfo *reg, uint32_t real_offset,
|
|
uint32_t *data)
|
|
{
|
|
uint32_t flags = s->msi->flags;
|
|
|
|
/* check the offset whether matches the type or not */
|
|
if (!(flags & PCI_MSI_FLAGS_MASKBIT)) {
|
|
*data = XEN_PT_INVALID_REG;
|
|
} else if (xen_pt_msi_check_type(reg->offset, flags, MASK)) {
|
|
*data = reg->init_val;
|
|
} else {
|
|
*data = XEN_PT_INVALID_REG;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* this function will be called twice (for 32 bit and 64 bit type) */
|
|
/* initialize Pending register */
|
|
static int xen_pt_pending_reg_init(XenPCIPassthroughState *s,
|
|
XenPTRegInfo *reg, uint32_t real_offset,
|
|
uint32_t *data)
|
|
{
|
|
uint32_t flags = s->msi->flags;
|
|
|
|
/* check the offset whether matches the type or not */
|
|
if (!(flags & PCI_MSI_FLAGS_MASKBIT)) {
|
|
*data = XEN_PT_INVALID_REG;
|
|
} else if (xen_pt_msi_check_type(reg->offset, flags, PENDING)) {
|
|
*data = reg->init_val;
|
|
} else {
|
|
*data = XEN_PT_INVALID_REG;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* write Message Address register */
|
|
static int xen_pt_msgaddr32_reg_write(XenPCIPassthroughState *s,
|
|
XenPTReg *cfg_entry, uint32_t *val,
|
|
uint32_t dev_value, uint32_t valid_mask)
|
|
{
|
|
XenPTRegInfo *reg = cfg_entry->reg;
|
|
uint32_t writable_mask = 0;
|
|
uint32_t old_addr = *cfg_entry->ptr.word;
|
|
uint32_t *data = cfg_entry->ptr.word;
|
|
|
|
/* modify emulate register */
|
|
writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
|
|
*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
|
|
s->msi->addr_lo = *data;
|
|
|
|
/* create value for writing to I/O device register */
|
|
*val = XEN_PT_MERGE_VALUE(*val, dev_value, 0);
|
|
|
|
/* update MSI */
|
|
if (*data != old_addr) {
|
|
if (s->msi->mapped) {
|
|
xen_pt_msi_update(s);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/* write Message Upper Address register */
|
|
static int xen_pt_msgaddr64_reg_write(XenPCIPassthroughState *s,
|
|
XenPTReg *cfg_entry, uint32_t *val,
|
|
uint32_t dev_value, uint32_t valid_mask)
|
|
{
|
|
XenPTRegInfo *reg = cfg_entry->reg;
|
|
uint32_t writable_mask = 0;
|
|
uint32_t old_addr = *cfg_entry->ptr.word;
|
|
uint32_t *data = cfg_entry->ptr.word;
|
|
|
|
/* check whether the type is 64 bit or not */
|
|
if (!(s->msi->flags & PCI_MSI_FLAGS_64BIT)) {
|
|
XEN_PT_ERR(&s->dev,
|
|
"Can't write to the upper address without 64 bit support\n");
|
|
return -1;
|
|
}
|
|
|
|
/* modify emulate register */
|
|
writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
|
|
*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
|
|
/* update the msi_info too */
|
|
s->msi->addr_hi = *data;
|
|
|
|
/* create value for writing to I/O device register */
|
|
*val = XEN_PT_MERGE_VALUE(*val, dev_value, 0);
|
|
|
|
/* update MSI */
|
|
if (*data != old_addr) {
|
|
if (s->msi->mapped) {
|
|
xen_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 xen_pt_msgdata_reg_write(XenPCIPassthroughState *s,
|
|
XenPTReg *cfg_entry, uint16_t *val,
|
|
uint16_t dev_value, uint16_t valid_mask)
|
|
{
|
|
XenPTRegInfo *reg = cfg_entry->reg;
|
|
XenPTMSI *msi = s->msi;
|
|
uint16_t writable_mask = 0;
|
|
uint16_t old_data = *cfg_entry->ptr.half_word;
|
|
uint32_t offset = reg->offset;
|
|
uint16_t *data = cfg_entry->ptr.half_word;
|
|
|
|
/* check the offset whether matches the type or not */
|
|
if (!xen_pt_msi_check_type(offset, msi->flags, DATA)) {
|
|
/* exit I/O emulator */
|
|
XEN_PT_ERR(&s->dev, "the offset does not match the 32/64 bit type!\n");
|
|
return -1;
|
|
}
|
|
|
|
/* modify emulate register */
|
|
writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
|
|
*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
|
|
/* update the msi_info too */
|
|
msi->data = *data;
|
|
|
|
/* create value for writing to I/O device register */
|
|
*val = XEN_PT_MERGE_VALUE(*val, dev_value, 0);
|
|
|
|
/* update MSI */
|
|
if (*data != old_data) {
|
|
if (msi->mapped) {
|
|
xen_pt_msi_update(s);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xen_pt_mask_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
|
|
uint32_t *val, uint32_t dev_value,
|
|
uint32_t valid_mask)
|
|
{
|
|
int rc;
|
|
|
|
rc = xen_pt_long_reg_write(s, cfg_entry, val, dev_value, valid_mask);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
|
|
s->msi->mask = *val;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* MSI Capability Structure reg static information table */
|
|
static XenPTRegInfo xen_pt_emu_reg_msi[] = {
|
|
/* Next Pointer reg */
|
|
{
|
|
.offset = PCI_CAP_LIST_NEXT,
|
|
.size = 1,
|
|
.init_val = 0x00,
|
|
.ro_mask = 0xFF,
|
|
.emu_mask = 0xFF,
|
|
.init = xen_pt_ptr_reg_init,
|
|
.u.b.read = xen_pt_byte_reg_read,
|
|
.u.b.write = xen_pt_byte_reg_write,
|
|
},
|
|
/* Message Control reg */
|
|
{
|
|
.offset = PCI_MSI_FLAGS,
|
|
.size = 2,
|
|
.init_val = 0x0000,
|
|
.res_mask = 0xFE00,
|
|
.ro_mask = 0x018E,
|
|
.emu_mask = 0x017E,
|
|
.init = xen_pt_msgctrl_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_msgctrl_reg_write,
|
|
},
|
|
/* Message Address reg */
|
|
{
|
|
.offset = PCI_MSI_ADDRESS_LO,
|
|
.size = 4,
|
|
.init_val = 0x00000000,
|
|
.ro_mask = 0x00000003,
|
|
.emu_mask = 0xFFFFFFFF,
|
|
.init = xen_pt_common_reg_init,
|
|
.u.dw.read = xen_pt_long_reg_read,
|
|
.u.dw.write = xen_pt_msgaddr32_reg_write,
|
|
},
|
|
/* 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,
|
|
.init = xen_pt_msgaddr64_reg_init,
|
|
.u.dw.read = xen_pt_long_reg_read,
|
|
.u.dw.write = xen_pt_msgaddr64_reg_write,
|
|
},
|
|
/* 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,
|
|
.init = xen_pt_msgdata_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_msgdata_reg_write,
|
|
},
|
|
/* 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,
|
|
.init = xen_pt_msgdata_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_msgdata_reg_write,
|
|
},
|
|
/* Mask reg (if PCI_MSI_FLAGS_MASKBIT set, for 32-bit devices) */
|
|
{
|
|
.offset = PCI_MSI_MASK_32,
|
|
.size = 4,
|
|
.init_val = 0x00000000,
|
|
.ro_mask = 0xFFFFFFFF,
|
|
.emu_mask = 0xFFFFFFFF,
|
|
.init = xen_pt_mask_reg_init,
|
|
.u.dw.read = xen_pt_long_reg_read,
|
|
.u.dw.write = xen_pt_mask_reg_write,
|
|
},
|
|
/* Mask reg (if PCI_MSI_FLAGS_MASKBIT set, for 64-bit devices) */
|
|
{
|
|
.offset = PCI_MSI_MASK_64,
|
|
.size = 4,
|
|
.init_val = 0x00000000,
|
|
.ro_mask = 0xFFFFFFFF,
|
|
.emu_mask = 0xFFFFFFFF,
|
|
.init = xen_pt_mask_reg_init,
|
|
.u.dw.read = xen_pt_long_reg_read,
|
|
.u.dw.write = xen_pt_mask_reg_write,
|
|
},
|
|
/* Pending reg (if PCI_MSI_FLAGS_MASKBIT set, for 32-bit devices) */
|
|
{
|
|
.offset = PCI_MSI_MASK_32 + 4,
|
|
.size = 4,
|
|
.init_val = 0x00000000,
|
|
.ro_mask = 0xFFFFFFFF,
|
|
.emu_mask = 0x00000000,
|
|
.init = xen_pt_pending_reg_init,
|
|
.u.dw.read = xen_pt_long_reg_read,
|
|
.u.dw.write = xen_pt_long_reg_write,
|
|
},
|
|
/* Pending reg (if PCI_MSI_FLAGS_MASKBIT set, for 64-bit devices) */
|
|
{
|
|
.offset = PCI_MSI_MASK_64 + 4,
|
|
.size = 4,
|
|
.init_val = 0x00000000,
|
|
.ro_mask = 0xFFFFFFFF,
|
|
.emu_mask = 0x00000000,
|
|
.init = xen_pt_pending_reg_init,
|
|
.u.dw.read = xen_pt_long_reg_read,
|
|
.u.dw.write = xen_pt_long_reg_write,
|
|
},
|
|
{
|
|
.size = 0,
|
|
},
|
|
};
|
|
|
|
|
|
/**************************************
|
|
* MSI-X Capability
|
|
*/
|
|
|
|
/* Message Control register for MSI-X */
|
|
static int xen_pt_msixctrl_reg_init(XenPCIPassthroughState *s,
|
|
XenPTRegInfo *reg, uint32_t real_offset,
|
|
uint32_t *data)
|
|
{
|
|
uint16_t reg_field;
|
|
int rc;
|
|
|
|
/* use I/O device register's value as initial value */
|
|
rc = xen_host_pci_get_word(&s->real_device, real_offset, ®_field);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
if (reg_field & PCI_MSIX_FLAGS_ENABLE) {
|
|
XEN_PT_LOG(&s->dev, "MSIX already enabled, disabling it first\n");
|
|
xen_host_pci_set_word(&s->real_device, real_offset,
|
|
reg_field & ~PCI_MSIX_FLAGS_ENABLE);
|
|
}
|
|
|
|
s->msix->ctrl_offset = real_offset;
|
|
|
|
*data = reg->init_val;
|
|
return 0;
|
|
}
|
|
static int xen_pt_msixctrl_reg_write(XenPCIPassthroughState *s,
|
|
XenPTReg *cfg_entry, uint16_t *val,
|
|
uint16_t dev_value, uint16_t valid_mask)
|
|
{
|
|
XenPTRegInfo *reg = cfg_entry->reg;
|
|
uint16_t writable_mask = 0;
|
|
uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
|
|
int debug_msix_enabled_old;
|
|
uint16_t *data = cfg_entry->ptr.half_word;
|
|
|
|
/* modify emulate register */
|
|
writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
|
|
*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
|
|
|
|
/* create value for writing to I/O device register */
|
|
*val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
|
|
|
|
/* update MSI-X */
|
|
if ((*val & PCI_MSIX_FLAGS_ENABLE)
|
|
&& !(*val & PCI_MSIX_FLAGS_MASKALL)) {
|
|
xen_pt_msix_update(s);
|
|
} else if (!(*val & PCI_MSIX_FLAGS_ENABLE) && s->msix->enabled) {
|
|
xen_pt_msix_disable(s);
|
|
}
|
|
|
|
s->msix->maskall = *val & PCI_MSIX_FLAGS_MASKALL;
|
|
|
|
debug_msix_enabled_old = s->msix->enabled;
|
|
s->msix->enabled = !!(*val & PCI_MSIX_FLAGS_ENABLE);
|
|
if (s->msix->enabled != debug_msix_enabled_old) {
|
|
XEN_PT_LOG(&s->dev, "%s MSI-X\n",
|
|
s->msix->enabled ? "enable" : "disable");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* MSI-X Capability Structure reg static information table */
|
|
static XenPTRegInfo xen_pt_emu_reg_msix[] = {
|
|
/* Next Pointer reg */
|
|
{
|
|
.offset = PCI_CAP_LIST_NEXT,
|
|
.size = 1,
|
|
.init_val = 0x00,
|
|
.ro_mask = 0xFF,
|
|
.emu_mask = 0xFF,
|
|
.init = xen_pt_ptr_reg_init,
|
|
.u.b.read = xen_pt_byte_reg_read,
|
|
.u.b.write = xen_pt_byte_reg_write,
|
|
},
|
|
/* Message Control reg */
|
|
{
|
|
.offset = PCI_MSI_FLAGS,
|
|
.size = 2,
|
|
.init_val = 0x0000,
|
|
.res_mask = 0x3800,
|
|
.ro_mask = 0x07FF,
|
|
.emu_mask = 0x0000,
|
|
.init = xen_pt_msixctrl_reg_init,
|
|
.u.w.read = xen_pt_word_reg_read,
|
|
.u.w.write = xen_pt_msixctrl_reg_write,
|
|
},
|
|
{
|
|
.size = 0,
|
|
},
|
|
};
|
|
|
|
static XenPTRegInfo xen_pt_emu_reg_igd_opregion[] = {
|
|
/* Intel IGFX OpRegion reg */
|
|
{
|
|
.offset = 0x0,
|
|
.size = 4,
|
|
.init_val = 0,
|
|
.emu_mask = 0xFFFFFFFF,
|
|
.u.dw.read = xen_pt_intel_opregion_read,
|
|
.u.dw.write = xen_pt_intel_opregion_write,
|
|
},
|
|
{
|
|
.size = 0,
|
|
},
|
|
};
|
|
|
|
/****************************
|
|
* Capabilities
|
|
*/
|
|
|
|
/* capability structure register group size functions */
|
|
|
|
static int xen_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 xen_pt_vendor_size_init(XenPCIPassthroughState *s,
|
|
const XenPTRegGroupInfo *grp_reg,
|
|
uint32_t base_offset, uint8_t *size)
|
|
{
|
|
return xen_host_pci_get_byte(&s->real_device, base_offset + 0x02, size);
|
|
}
|
|
/* get PCI Express Capability Structure register group size */
|
|
static int xen_pt_pcie_size_init(XenPCIPassthroughState *s,
|
|
const XenPTRegGroupInfo *grp_reg,
|
|
uint32_t base_offset, uint8_t *size)
|
|
{
|
|
PCIDevice *d = PCI_DEVICE(s);
|
|
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:
|
|
XEN_PT_ERR(d, "Unsupported device/port type 0x%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:
|
|
XEN_PT_ERR(d, "Unsupported device/port type 0x%x.\n", type);
|
|
return -1;
|
|
}
|
|
} else {
|
|
XEN_PT_ERR(d, "Unsupported capability version 0x%x.\n", version);
|
|
return -1;
|
|
}
|
|
|
|
*size = pcie_size;
|
|
return 0;
|
|
}
|
|
/* get MSI Capability Structure register group size */
|
|
static int xen_pt_msi_size_init(XenPCIPassthroughState *s,
|
|
const XenPTRegGroupInfo *grp_reg,
|
|
uint32_t base_offset, uint8_t *size)
|
|
{
|
|
uint16_t msg_ctrl = 0;
|
|
uint8_t msi_size = 0xa;
|
|
int rc;
|
|
|
|
rc = xen_host_pci_get_word(&s->real_device, base_offset + PCI_MSI_FLAGS,
|
|
&msg_ctrl);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
/* check if 64-bit address is capable of per-vector masking */
|
|
if (msg_ctrl & PCI_MSI_FLAGS_64BIT) {
|
|
msi_size += 4;
|
|
}
|
|
if (msg_ctrl & PCI_MSI_FLAGS_MASKBIT) {
|
|
msi_size += 10;
|
|
}
|
|
|
|
s->msi = g_new0(XenPTMSI, 1);
|
|
s->msi->pirq = XEN_PT_UNASSIGNED_PIRQ;
|
|
|
|
*size = msi_size;
|
|
return 0;
|
|
}
|
|
/* get MSI-X Capability Structure register group size */
|
|
static int xen_pt_msix_size_init(XenPCIPassthroughState *s,
|
|
const XenPTRegGroupInfo *grp_reg,
|
|
uint32_t base_offset, uint8_t *size)
|
|
{
|
|
int rc = 0;
|
|
|
|
rc = xen_pt_msix_init(s, base_offset);
|
|
|
|
if (rc < 0) {
|
|
XEN_PT_ERR(&s->dev, "Internal error: Invalid xen_pt_msix_init.\n");
|
|
return rc;
|
|
}
|
|
|
|
*size = grp_reg->grp_size;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static const XenPTRegGroupInfo xen_pt_emu_reg_grps[] = {
|
|
/* Header Type0 reg group */
|
|
{
|
|
.grp_id = 0xFF,
|
|
.grp_type = XEN_PT_GRP_TYPE_EMU,
|
|
.grp_size = 0x40,
|
|
.size_init = xen_pt_reg_grp_size_init,
|
|
.emu_regs = xen_pt_emu_reg_header0,
|
|
},
|
|
/* PCI PowerManagement Capability reg group */
|
|
{
|
|
.grp_id = PCI_CAP_ID_PM,
|
|
.grp_type = XEN_PT_GRP_TYPE_EMU,
|
|
.grp_size = PCI_PM_SIZEOF,
|
|
.size_init = xen_pt_reg_grp_size_init,
|
|
.emu_regs = xen_pt_emu_reg_pm,
|
|
},
|
|
/* AGP Capability Structure reg group */
|
|
{
|
|
.grp_id = PCI_CAP_ID_AGP,
|
|
.grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
|
|
.grp_size = 0x30,
|
|
.size_init = xen_pt_reg_grp_size_init,
|
|
},
|
|
/* Vital Product Data Capability Structure reg group */
|
|
{
|
|
.grp_id = PCI_CAP_ID_VPD,
|
|
.grp_type = XEN_PT_GRP_TYPE_EMU,
|
|
.grp_size = 0x08,
|
|
.size_init = xen_pt_reg_grp_size_init,
|
|
.emu_regs = xen_pt_emu_reg_vpd,
|
|
},
|
|
/* Slot Identification reg group */
|
|
{
|
|
.grp_id = PCI_CAP_ID_SLOTID,
|
|
.grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
|
|
.grp_size = 0x04,
|
|
.size_init = xen_pt_reg_grp_size_init,
|
|
},
|
|
/* MSI Capability Structure reg group */
|
|
{
|
|
.grp_id = PCI_CAP_ID_MSI,
|
|
.grp_type = XEN_PT_GRP_TYPE_EMU,
|
|
.grp_size = 0xFF,
|
|
.size_init = xen_pt_msi_size_init,
|
|
.emu_regs = xen_pt_emu_reg_msi,
|
|
},
|
|
/* PCI-X Capabilities List Item reg group */
|
|
{
|
|
.grp_id = PCI_CAP_ID_PCIX,
|
|
.grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
|
|
.grp_size = 0x18,
|
|
.size_init = xen_pt_reg_grp_size_init,
|
|
},
|
|
/* Vendor Specific Capability Structure reg group */
|
|
{
|
|
.grp_id = PCI_CAP_ID_VNDR,
|
|
.grp_type = XEN_PT_GRP_TYPE_EMU,
|
|
.grp_size = 0xFF,
|
|
.size_init = xen_pt_vendor_size_init,
|
|
.emu_regs = xen_pt_emu_reg_vendor,
|
|
},
|
|
/* SHPC Capability List Item reg group */
|
|
{
|
|
.grp_id = PCI_CAP_ID_SHPC,
|
|
.grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
|
|
.grp_size = 0x08,
|
|
.size_init = xen_pt_reg_grp_size_init,
|
|
},
|
|
/* Subsystem ID and Subsystem Vendor ID Capability List Item reg group */
|
|
{
|
|
.grp_id = PCI_CAP_ID_SSVID,
|
|
.grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
|
|
.grp_size = 0x08,
|
|
.size_init = xen_pt_reg_grp_size_init,
|
|
},
|
|
/* AGP 8x Capability Structure reg group */
|
|
{
|
|
.grp_id = PCI_CAP_ID_AGP3,
|
|
.grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
|
|
.grp_size = 0x30,
|
|
.size_init = xen_pt_reg_grp_size_init,
|
|
},
|
|
/* PCI Express Capability Structure reg group */
|
|
{
|
|
.grp_id = PCI_CAP_ID_EXP,
|
|
.grp_type = XEN_PT_GRP_TYPE_EMU,
|
|
.grp_size = 0xFF,
|
|
.size_init = xen_pt_pcie_size_init,
|
|
.emu_regs = xen_pt_emu_reg_pcie,
|
|
},
|
|
/* MSI-X Capability Structure reg group */
|
|
{
|
|
.grp_id = PCI_CAP_ID_MSIX,
|
|
.grp_type = XEN_PT_GRP_TYPE_EMU,
|
|
.grp_size = 0x0C,
|
|
.size_init = xen_pt_msix_size_init,
|
|
.emu_regs = xen_pt_emu_reg_msix,
|
|
},
|
|
/* Intel IGD Opregion group */
|
|
{
|
|
.grp_id = XEN_PCI_INTEL_OPREGION,
|
|
.grp_type = XEN_PT_GRP_TYPE_EMU,
|
|
.grp_size = 0x4,
|
|
.size_init = xen_pt_reg_grp_size_init,
|
|
.emu_regs = xen_pt_emu_reg_igd_opregion,
|
|
},
|
|
{
|
|
.grp_size = 0,
|
|
},
|
|
};
|
|
|
|
/* initialize Capabilities Pointer or Next Pointer register */
|
|
static int xen_pt_ptr_reg_init(XenPCIPassthroughState *s,
|
|
XenPTRegInfo *reg, uint32_t real_offset,
|
|
uint32_t *data)
|
|
{
|
|
int i, rc;
|
|
uint8_t reg_field;
|
|
uint8_t cap_id = 0;
|
|
|
|
rc = xen_host_pci_get_byte(&s->real_device, real_offset, ®_field);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
/* find capability offset */
|
|
while (reg_field) {
|
|
for (i = 0; xen_pt_emu_reg_grps[i].grp_size != 0; i++) {
|
|
if (xen_pt_hide_dev_cap(&s->real_device,
|
|
xen_pt_emu_reg_grps[i].grp_id)) {
|
|
continue;
|
|
}
|
|
|
|
rc = xen_host_pci_get_byte(&s->real_device,
|
|
reg_field + PCI_CAP_LIST_ID, &cap_id);
|
|
if (rc) {
|
|
XEN_PT_ERR(&s->dev, "Failed to read capability @0x%x (rc:%d)\n",
|
|
reg_field + PCI_CAP_LIST_ID, rc);
|
|
return rc;
|
|
}
|
|
if (xen_pt_emu_reg_grps[i].grp_id == cap_id) {
|
|
if (xen_pt_emu_reg_grps[i].grp_type == XEN_PT_GRP_TYPE_EMU) {
|
|
goto out;
|
|
}
|
|
/* ignore the 0 hardwired capability, find next one */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* next capability */
|
|
rc = xen_host_pci_get_byte(&s->real_device,
|
|
reg_field + PCI_CAP_LIST_NEXT, ®_field);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
out:
|
|
*data = reg_field;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*************
|
|
* Main
|
|
*/
|
|
|
|
static uint8_t find_cap_offset(XenPCIPassthroughState *s, uint8_t cap)
|
|
{
|
|
uint8_t id;
|
|
unsigned max_cap = XEN_PCI_CAP_MAX;
|
|
uint8_t pos = PCI_CAPABILITY_LIST;
|
|
uint8_t status = 0;
|
|
|
|
if (xen_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 (xen_host_pci_get_byte(&s->real_device, pos, &pos)) {
|
|
break;
|
|
}
|
|
if (pos < PCI_CONFIG_HEADER_SIZE) {
|
|
break;
|
|
}
|
|
|
|
pos &= ~3;
|
|
if (xen_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 void xen_pt_config_reg_init(XenPCIPassthroughState *s,
|
|
XenPTRegGroup *reg_grp, XenPTRegInfo *reg,
|
|
Error **errp)
|
|
{
|
|
XenPTReg *reg_entry;
|
|
uint32_t data = 0;
|
|
int rc = 0;
|
|
|
|
reg_entry = g_new0(XenPTReg, 1);
|
|
reg_entry->reg = reg;
|
|
|
|
if (reg->init) {
|
|
uint32_t host_mask, size_mask;
|
|
unsigned int offset;
|
|
uint32_t val = 0;
|
|
|
|
/* initialize emulate register */
|
|
rc = reg->init(s, reg_entry->reg,
|
|
reg_grp->base_offset + reg->offset, &data);
|
|
if (rc < 0) {
|
|
g_free(reg_entry);
|
|
error_setg(errp, "Init emulate register fail");
|
|
return;
|
|
}
|
|
if (data == XEN_PT_INVALID_REG) {
|
|
/* free unused BAR register entry */
|
|
g_free(reg_entry);
|
|
return;
|
|
}
|
|
/* Sync up the data to dev.config */
|
|
offset = reg_grp->base_offset + reg->offset;
|
|
size_mask = 0xFFFFFFFF >> ((4 - reg->size) << 3);
|
|
|
|
switch (reg->size) {
|
|
case 1: rc = xen_host_pci_get_byte(&s->real_device, offset, (uint8_t *)&val);
|
|
break;
|
|
case 2: rc = xen_host_pci_get_word(&s->real_device, offset, (uint16_t *)&val);
|
|
break;
|
|
case 4: rc = xen_host_pci_get_long(&s->real_device, offset, &val);
|
|
break;
|
|
default: abort();
|
|
}
|
|
if (rc) {
|
|
/* Serious issues when we cannot read the host values! */
|
|
g_free(reg_entry);
|
|
error_setg(errp, "Cannot read host values");
|
|
return;
|
|
}
|
|
/* Set bits in emu_mask are the ones we emulate. The dev.config shall
|
|
* contain the emulated view of the guest - therefore we flip the mask
|
|
* to mask out the host values (which dev.config initially has) . */
|
|
host_mask = size_mask & ~reg->emu_mask;
|
|
|
|
if ((data & host_mask) != (val & host_mask)) {
|
|
uint32_t new_val;
|
|
/*
|
|
* Merge the emulated bits (data) with the host bits (val)
|
|
* and mask out the bits past size to enable restoration
|
|
* of the proper value for logging below.
|
|
*/
|
|
new_val = XEN_PT_MERGE_VALUE(val, data, host_mask) & size_mask;
|
|
/* Leave intact host and emulated values past the size - even though
|
|
* we do not care as we write per reg->size granularity, but for the
|
|
* logging below lets have the proper value. */
|
|
new_val |= ((val | data)) & ~size_mask;
|
|
XEN_PT_LOG(&s->dev,"Offset 0x%04x mismatch! Emulated=0x%04x, host=0x%04x, syncing to 0x%04x.\n",
|
|
offset, data, val, new_val);
|
|
val = new_val;
|
|
} else
|
|
val = data;
|
|
|
|
if (val & ~size_mask) {
|
|
error_setg(errp, "Offset 0x%04x:0x%04x expands past"
|
|
" register size (%d)", offset, val, reg->size);
|
|
g_free(reg_entry);
|
|
return;
|
|
}
|
|
/* This could be just pci_set_long as we don't modify the bits
|
|
* past reg->size, but in case this routine is run in parallel or the
|
|
* init value is larger, we do not want to over-write registers. */
|
|
switch (reg->size) {
|
|
case 1: pci_set_byte(s->dev.config + offset, (uint8_t)val);
|
|
break;
|
|
case 2: pci_set_word(s->dev.config + offset, (uint16_t)val);
|
|
break;
|
|
case 4: pci_set_long(s->dev.config + offset, val);
|
|
break;
|
|
default: abort();
|
|
}
|
|
/* set register value pointer to the data. */
|
|
reg_entry->ptr.byte = s->dev.config + offset;
|
|
|
|
}
|
|
/* list add register entry */
|
|
QLIST_INSERT_HEAD(®_grp->reg_tbl_list, reg_entry, entries);
|
|
}
|
|
|
|
void xen_pt_config_init(XenPCIPassthroughState *s, Error **errp)
|
|
{
|
|
ERRP_GUARD();
|
|
int i, rc;
|
|
|
|
QLIST_INIT(&s->reg_grps);
|
|
|
|
for (i = 0; xen_pt_emu_reg_grps[i].grp_size != 0; i++) {
|
|
uint32_t reg_grp_offset = 0;
|
|
XenPTRegGroup *reg_grp_entry = NULL;
|
|
|
|
if (xen_pt_emu_reg_grps[i].grp_id != 0xFF
|
|
&& xen_pt_emu_reg_grps[i].grp_id != XEN_PCI_INTEL_OPREGION) {
|
|
if (xen_pt_hide_dev_cap(&s->real_device,
|
|
xen_pt_emu_reg_grps[i].grp_id)) {
|
|
continue;
|
|
}
|
|
|
|
reg_grp_offset = find_cap_offset(s, xen_pt_emu_reg_grps[i].grp_id);
|
|
|
|
if (!reg_grp_offset) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (xen_pt_emu_reg_grps[i].grp_id == XEN_PCI_INTEL_OPREGION) {
|
|
if (!is_igd_vga_passthrough(&s->real_device) ||
|
|
s->real_device.vendor_id != PCI_VENDOR_ID_INTEL) {
|
|
continue;
|
|
}
|
|
/*
|
|
* By default we will trap up to 0x40 in the cfg space.
|
|
* If an intel device is pass through we need to trap 0xfc,
|
|
* therefore the size should be 0xff.
|
|
*/
|
|
reg_grp_offset = XEN_PCI_INTEL_OPREGION;
|
|
}
|
|
|
|
reg_grp_entry = g_new0(XenPTRegGroup, 1);
|
|
QLIST_INIT(®_grp_entry->reg_tbl_list);
|
|
QLIST_INSERT_HEAD(&s->reg_grps, reg_grp_entry, entries);
|
|
|
|
reg_grp_entry->base_offset = reg_grp_offset;
|
|
reg_grp_entry->reg_grp = xen_pt_emu_reg_grps + i;
|
|
if (xen_pt_emu_reg_grps[i].size_init) {
|
|
/* get register group size */
|
|
rc = xen_pt_emu_reg_grps[i].size_init(s, reg_grp_entry->reg_grp,
|
|
reg_grp_offset,
|
|
®_grp_entry->size);
|
|
if (rc < 0) {
|
|
error_setg(errp, "Failed to initialize %d/%zu, type = 0x%x,"
|
|
" rc: %d", i, ARRAY_SIZE(xen_pt_emu_reg_grps),
|
|
xen_pt_emu_reg_grps[i].grp_type, rc);
|
|
xen_pt_config_delete(s);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (xen_pt_emu_reg_grps[i].grp_type == XEN_PT_GRP_TYPE_EMU) {
|
|
if (xen_pt_emu_reg_grps[i].emu_regs) {
|
|
int j = 0;
|
|
XenPTRegInfo *regs = xen_pt_emu_reg_grps[i].emu_regs;
|
|
|
|
/* initialize capability register */
|
|
for (j = 0; regs->size != 0; j++, regs++) {
|
|
xen_pt_config_reg_init(s, reg_grp_entry, regs, errp);
|
|
if (*errp) {
|
|
error_append_hint(errp, "Failed to init register %d"
|
|
" offsets 0x%x in grp_type = 0x%x (%d/%zu)",
|
|
j,
|
|
regs->offset,
|
|
xen_pt_emu_reg_grps[i].grp_type,
|
|
i, ARRAY_SIZE(xen_pt_emu_reg_grps));
|
|
xen_pt_config_delete(s);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* delete all emulate register */
|
|
void xen_pt_config_delete(XenPCIPassthroughState *s)
|
|
{
|
|
struct XenPTRegGroup *reg_group, *next_grp;
|
|
struct XenPTReg *reg, *next_reg;
|
|
|
|
/* free MSI/MSI-X info table */
|
|
if (s->msix) {
|
|
xen_pt_msix_unmap(s);
|
|
}
|
|
g_free(s->msi);
|
|
|
|
/* free all register group entry */
|
|
QLIST_FOREACH_SAFE(reg_group, &s->reg_grps, 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);
|
|
}
|
|
}
|