2 * Copyright (c) 2007, Neocleus Corporation.
3 * Copyright (c) 2007, Intel Corporation.
5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
8 * Alex Novik <alex@neocleus.com>
9 * Allen Kay <allen.m.kay@intel.com>
10 * Guy Zana <guy@neocleus.com>
12 * This file implements direct PCI assignment to a HVM guest
15 #include "qemu/timer.h"
16 #include "hw/xen/xen_backend.h"
19 #define XEN_PT_MERGE_VALUE(value, data, val_mask) \
20 (((value) & (val_mask)) | ((data) & ~(val_mask)))
22 #define XEN_PT_INVALID_REG 0xFFFFFFFF /* invalid register value */
26 static int xen_pt_ptr_reg_init(XenPCIPassthroughState *s, XenPTRegInfo *reg,
27 uint32_t real_offset, uint32_t *data);
32 /* A return value of 1 means the capability should NOT be exposed to guest. */
33 static int xen_pt_hide_dev_cap(const XenHostPCIDevice *d, uint8_t grp_id)
37 /* The PCI Express Capability Structure of the VF of Intel 82599 10GbE
38 * Controller looks trivial, e.g., the PCI Express Capabilities
39 * Register is 0. We should not try to expose it to guest.
41 * The datasheet is available at
42 * http://download.intel.com/design/network/datashts/82599_datasheet.pdf
44 * See 'Table 9.7. VF PCIe Configuration Space' of the datasheet, the
45 * PCI Express Capability Structure of the VF of Intel 82599 10GbE
46 * Controller looks trivial, e.g., the PCI Express Capabilities
47 * Register is 0, so the Capability Version is 0 and
48 * xen_pt_pcie_size_init() would fail.
50 if (d->vendor_id == PCI_VENDOR_ID_INTEL &&
51 d->device_id == PCI_DEVICE_ID_INTEL_82599_SFP_VF) {
59 /* find emulate register group entry */
60 XenPTRegGroup *xen_pt_find_reg_grp(XenPCIPassthroughState *s, uint32_t address)
62 XenPTRegGroup *entry = NULL;
64 /* find register group entry */
65 QLIST_FOREACH(entry, &s->reg_grps, entries) {
67 if ((entry->base_offset <= address)
68 && ((entry->base_offset + entry->size) > address)) {
73 /* group entry not found */
77 /* find emulate register entry */
78 XenPTReg *xen_pt_find_reg(XenPTRegGroup *reg_grp, uint32_t address)
80 XenPTReg *reg_entry = NULL;
81 XenPTRegInfo *reg = NULL;
82 uint32_t real_offset = 0;
84 /* find register entry */
85 QLIST_FOREACH(reg_entry, ®_grp->reg_tbl_list, entries) {
87 real_offset = reg_grp->base_offset + reg->offset;
89 if ((real_offset <= address)
90 && ((real_offset + reg->size) > address)) {
98 static uint32_t get_throughable_mask(const XenPCIPassthroughState *s,
99 XenPTRegInfo *reg, uint32_t valid_mask)
101 uint32_t throughable_mask = ~(reg->emu_mask | reg->ro_mask);
103 if (!s->permissive) {
104 throughable_mask &= ~reg->res_mask;
107 return throughable_mask & valid_mask;
111 * general register functions
114 /* register initialization function */
116 static int xen_pt_common_reg_init(XenPCIPassthroughState *s,
117 XenPTRegInfo *reg, uint32_t real_offset,
120 *data = reg->init_val;
124 /* Read register functions */
126 static int xen_pt_byte_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
127 uint8_t *value, uint8_t valid_mask)
129 XenPTRegInfo *reg = cfg_entry->reg;
130 uint8_t valid_emu_mask = 0;
132 /* emulate byte register */
133 valid_emu_mask = reg->emu_mask & valid_mask;
134 *value = XEN_PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
138 static int xen_pt_word_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
139 uint16_t *value, uint16_t valid_mask)
141 XenPTRegInfo *reg = cfg_entry->reg;
142 uint16_t valid_emu_mask = 0;
144 /* emulate word register */
145 valid_emu_mask = reg->emu_mask & valid_mask;
146 *value = XEN_PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
150 static int xen_pt_long_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
151 uint32_t *value, uint32_t valid_mask)
153 XenPTRegInfo *reg = cfg_entry->reg;
154 uint32_t valid_emu_mask = 0;
156 /* emulate long register */
157 valid_emu_mask = reg->emu_mask & valid_mask;
158 *value = XEN_PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
163 /* Write register functions */
165 static int xen_pt_byte_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
166 uint8_t *val, uint8_t dev_value,
169 XenPTRegInfo *reg = cfg_entry->reg;
170 uint8_t writable_mask = 0;
171 uint8_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
173 /* modify emulate register */
174 writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
175 cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
177 /* create value for writing to I/O device register */
178 *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
182 static int xen_pt_word_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
183 uint16_t *val, uint16_t dev_value,
186 XenPTRegInfo *reg = cfg_entry->reg;
187 uint16_t writable_mask = 0;
188 uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
190 /* modify emulate register */
191 writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
192 cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
194 /* create value for writing to I/O device register */
195 *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
199 static int xen_pt_long_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
200 uint32_t *val, uint32_t dev_value,
203 XenPTRegInfo *reg = cfg_entry->reg;
204 uint32_t writable_mask = 0;
205 uint32_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
207 /* modify emulate register */
208 writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
209 cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
211 /* create value for writing to I/O device register */
212 *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
218 /* XenPTRegInfo declaration
219 * - only for emulated register (either a part or whole bit).
220 * - for passthrough register that need special behavior (like interacting with
221 * other component), set emu_mask to all 0 and specify r/w func properly.
222 * - do NOT use ALL F for init_val, otherwise the tbl will not be registered.
225 /********************
229 static int xen_pt_vendor_reg_init(XenPCIPassthroughState *s,
230 XenPTRegInfo *reg, uint32_t real_offset,
233 *data = s->real_device.vendor_id;
236 static int xen_pt_device_reg_init(XenPCIPassthroughState *s,
237 XenPTRegInfo *reg, uint32_t real_offset,
240 *data = s->real_device.device_id;
243 static int xen_pt_status_reg_init(XenPCIPassthroughState *s,
244 XenPTRegInfo *reg, uint32_t real_offset,
247 XenPTRegGroup *reg_grp_entry = NULL;
248 XenPTReg *reg_entry = NULL;
249 uint32_t reg_field = 0;
251 /* find Header register group */
252 reg_grp_entry = xen_pt_find_reg_grp(s, PCI_CAPABILITY_LIST);
254 /* find Capabilities Pointer register */
255 reg_entry = xen_pt_find_reg(reg_grp_entry, PCI_CAPABILITY_LIST);
257 /* check Capabilities Pointer register */
258 if (reg_entry->data) {
259 reg_field |= PCI_STATUS_CAP_LIST;
261 reg_field &= ~PCI_STATUS_CAP_LIST;
264 xen_shutdown_fatal_error("Internal error: Couldn't find XenPTReg*"
265 " for Capabilities Pointer register."
266 " (%s)\n", __func__);
270 xen_shutdown_fatal_error("Internal error: Couldn't find XenPTRegGroup"
271 " for Header. (%s)\n", __func__);
278 static int xen_pt_header_type_reg_init(XenPCIPassthroughState *s,
279 XenPTRegInfo *reg, uint32_t real_offset,
282 /* read PCI_HEADER_TYPE */
283 *data = reg->init_val | 0x80;
287 /* initialize Interrupt Pin register */
288 static int xen_pt_irqpin_reg_init(XenPCIPassthroughState *s,
289 XenPTRegInfo *reg, uint32_t real_offset,
292 *data = xen_pt_pci_read_intx(s);
296 /* Command register */
297 static int xen_pt_cmd_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
298 uint16_t *val, uint16_t dev_value,
301 XenPTRegInfo *reg = cfg_entry->reg;
302 uint16_t writable_mask = 0;
303 uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
305 /* modify emulate register */
306 writable_mask = ~reg->ro_mask & valid_mask;
307 cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
309 /* create value for writing to I/O device register */
310 if (*val & PCI_COMMAND_INTX_DISABLE) {
311 throughable_mask |= PCI_COMMAND_INTX_DISABLE;
313 if (s->machine_irq) {
314 throughable_mask |= PCI_COMMAND_INTX_DISABLE;
318 *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
324 #define XEN_PT_BAR_MEM_RO_MASK 0x0000000F /* BAR ReadOnly mask(Memory) */
325 #define XEN_PT_BAR_MEM_EMU_MASK 0xFFFFFFF0 /* BAR emul mask(Memory) */
326 #define XEN_PT_BAR_IO_RO_MASK 0x00000003 /* BAR ReadOnly mask(I/O) */
327 #define XEN_PT_BAR_IO_EMU_MASK 0xFFFFFFFC /* BAR emul mask(I/O) */
329 static bool is_64bit_bar(PCIIORegion *r)
331 return !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64);
334 static uint64_t xen_pt_get_bar_size(PCIIORegion *r)
336 if (is_64bit_bar(r)) {
338 size64 = (r + 1)->size;
346 static XenPTBarFlag xen_pt_bar_reg_parse(XenPCIPassthroughState *s,
349 PCIDevice *d = &s->dev;
350 XenPTRegion *region = NULL;
353 /* check 64bit BAR */
354 if ((0 < index) && (index < PCI_ROM_SLOT)) {
355 int type = s->real_device.io_regions[index - 1].type;
357 if ((type & XEN_HOST_PCI_REGION_TYPE_MEM)
358 && (type & XEN_HOST_PCI_REGION_TYPE_MEM_64)) {
359 region = &s->bases[index - 1];
360 if (region->bar_flag != XEN_PT_BAR_FLAG_UPPER) {
361 return XEN_PT_BAR_FLAG_UPPER;
366 /* check unused BAR */
367 r = &d->io_regions[index];
368 if (!xen_pt_get_bar_size(r)) {
369 return XEN_PT_BAR_FLAG_UNUSED;
373 if (index == PCI_ROM_SLOT) {
374 return XEN_PT_BAR_FLAG_MEM;
377 /* check BAR I/O indicator */
378 if (s->real_device.io_regions[index].type & XEN_HOST_PCI_REGION_TYPE_IO) {
379 return XEN_PT_BAR_FLAG_IO;
381 return XEN_PT_BAR_FLAG_MEM;
385 static inline uint32_t base_address_with_flags(XenHostPCIIORegion *hr)
387 if (hr->type & XEN_HOST_PCI_REGION_TYPE_IO) {
388 return hr->base_addr | (hr->bus_flags & ~PCI_BASE_ADDRESS_IO_MASK);
390 return hr->base_addr | (hr->bus_flags & ~PCI_BASE_ADDRESS_MEM_MASK);
394 static int xen_pt_bar_reg_init(XenPCIPassthroughState *s, XenPTRegInfo *reg,
395 uint32_t real_offset, uint32_t *data)
397 uint32_t reg_field = 0;
400 index = xen_pt_bar_offset_to_index(reg->offset);
401 if (index < 0 || index >= PCI_NUM_REGIONS) {
402 XEN_PT_ERR(&s->dev, "Internal error: Invalid BAR index [%d].\n", index);
407 s->bases[index].bar_flag = xen_pt_bar_reg_parse(s, index);
408 if (s->bases[index].bar_flag == XEN_PT_BAR_FLAG_UNUSED) {
409 reg_field = XEN_PT_INVALID_REG;
415 static int xen_pt_bar_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
416 uint32_t *value, uint32_t valid_mask)
418 XenPTRegInfo *reg = cfg_entry->reg;
419 uint32_t valid_emu_mask = 0;
420 uint32_t bar_emu_mask = 0;
424 index = xen_pt_bar_offset_to_index(reg->offset);
425 if (index < 0 || index >= PCI_NUM_REGIONS - 1) {
426 XEN_PT_ERR(&s->dev, "Internal error: Invalid BAR index [%d].\n", index);
430 /* use fixed-up value from kernel sysfs */
431 *value = base_address_with_flags(&s->real_device.io_regions[index]);
433 /* set emulate mask depend on BAR flag */
434 switch (s->bases[index].bar_flag) {
435 case XEN_PT_BAR_FLAG_MEM:
436 bar_emu_mask = XEN_PT_BAR_MEM_EMU_MASK;
438 case XEN_PT_BAR_FLAG_IO:
439 bar_emu_mask = XEN_PT_BAR_IO_EMU_MASK;
441 case XEN_PT_BAR_FLAG_UPPER:
442 bar_emu_mask = XEN_PT_BAR_ALLF;
449 valid_emu_mask = bar_emu_mask & valid_mask;
450 *value = XEN_PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
454 static int xen_pt_bar_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
455 uint32_t *val, uint32_t dev_value,
458 XenPTRegInfo *reg = cfg_entry->reg;
459 XenPTRegion *base = NULL;
460 PCIDevice *d = &s->dev;
461 const PCIIORegion *r;
462 uint32_t writable_mask = 0;
463 uint32_t bar_emu_mask = 0;
464 uint32_t bar_ro_mask = 0;
468 index = xen_pt_bar_offset_to_index(reg->offset);
469 if (index < 0 || index >= PCI_NUM_REGIONS) {
470 XEN_PT_ERR(d, "Internal error: Invalid BAR index [%d].\n", index);
474 r = &d->io_regions[index];
475 base = &s->bases[index];
476 r_size = xen_pt_get_emul_size(base->bar_flag, r->size);
478 /* set emulate mask and read-only mask values depend on the BAR flag */
479 switch (s->bases[index].bar_flag) {
480 case XEN_PT_BAR_FLAG_MEM:
481 bar_emu_mask = XEN_PT_BAR_MEM_EMU_MASK;
483 /* low 32 bits mask for 64 bit bars */
484 bar_ro_mask = XEN_PT_BAR_ALLF;
486 bar_ro_mask = XEN_PT_BAR_MEM_RO_MASK | (r_size - 1);
489 case XEN_PT_BAR_FLAG_IO:
490 bar_emu_mask = XEN_PT_BAR_IO_EMU_MASK;
491 bar_ro_mask = XEN_PT_BAR_IO_RO_MASK | (r_size - 1);
493 case XEN_PT_BAR_FLAG_UPPER:
494 bar_emu_mask = XEN_PT_BAR_ALLF;
495 bar_ro_mask = r_size ? r_size - 1 : 0;
501 /* modify emulate register */
502 writable_mask = bar_emu_mask & ~bar_ro_mask & valid_mask;
503 cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
505 /* check whether we need to update the virtual region address or not */
506 switch (s->bases[index].bar_flag) {
507 case XEN_PT_BAR_FLAG_UPPER:
508 case XEN_PT_BAR_FLAG_MEM:
511 case XEN_PT_BAR_FLAG_IO:
518 /* create value for writing to I/O device register */
519 *val = XEN_PT_MERGE_VALUE(*val, dev_value, 0);
524 /* write Exp ROM BAR */
525 static int xen_pt_exp_rom_bar_reg_write(XenPCIPassthroughState *s,
526 XenPTReg *cfg_entry, uint32_t *val,
527 uint32_t dev_value, uint32_t valid_mask)
529 XenPTRegInfo *reg = cfg_entry->reg;
530 XenPTRegion *base = NULL;
531 PCIDevice *d = (PCIDevice *)&s->dev;
532 uint32_t writable_mask = 0;
533 uint32_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
535 uint32_t bar_ro_mask = 0;
537 r_size = d->io_regions[PCI_ROM_SLOT].size;
538 base = &s->bases[PCI_ROM_SLOT];
539 /* align memory type resource size */
540 r_size = xen_pt_get_emul_size(base->bar_flag, r_size);
542 /* set emulate mask and read-only mask */
543 bar_ro_mask = (reg->ro_mask | (r_size - 1)) & ~PCI_ROM_ADDRESS_ENABLE;
545 /* modify emulate register */
546 writable_mask = ~bar_ro_mask & valid_mask;
547 cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
549 /* create value for writing to I/O device register */
550 *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
555 /* Header Type0 reg static information table */
556 static XenPTRegInfo xen_pt_emu_reg_header0[] = {
559 .offset = PCI_VENDOR_ID,
564 .init = xen_pt_vendor_reg_init,
565 .u.w.read = xen_pt_word_reg_read,
566 .u.w.write = xen_pt_word_reg_write,
570 .offset = PCI_DEVICE_ID,
575 .init = xen_pt_device_reg_init,
576 .u.w.read = xen_pt_word_reg_read,
577 .u.w.write = xen_pt_word_reg_write,
581 .offset = PCI_COMMAND,
586 .init = xen_pt_common_reg_init,
587 .u.w.read = xen_pt_word_reg_read,
588 .u.w.write = xen_pt_cmd_reg_write,
590 /* Capabilities Pointer reg */
592 .offset = PCI_CAPABILITY_LIST,
597 .init = xen_pt_ptr_reg_init,
598 .u.b.read = xen_pt_byte_reg_read,
599 .u.b.write = xen_pt_byte_reg_write,
602 /* use emulated Cap Ptr value to initialize,
603 * so need to be declared after Cap Ptr reg
606 .offset = PCI_STATUS,
612 .init = xen_pt_status_reg_init,
613 .u.w.read = xen_pt_word_reg_read,
614 .u.w.write = xen_pt_word_reg_write,
616 /* Cache Line Size reg */
618 .offset = PCI_CACHE_LINE_SIZE,
623 .init = xen_pt_common_reg_init,
624 .u.b.read = xen_pt_byte_reg_read,
625 .u.b.write = xen_pt_byte_reg_write,
627 /* Latency Timer reg */
629 .offset = PCI_LATENCY_TIMER,
634 .init = xen_pt_common_reg_init,
635 .u.b.read = xen_pt_byte_reg_read,
636 .u.b.write = xen_pt_byte_reg_write,
638 /* Header Type reg */
640 .offset = PCI_HEADER_TYPE,
645 .init = xen_pt_header_type_reg_init,
646 .u.b.read = xen_pt_byte_reg_read,
647 .u.b.write = xen_pt_byte_reg_write,
649 /* Interrupt Line reg */
651 .offset = PCI_INTERRUPT_LINE,
656 .init = xen_pt_common_reg_init,
657 .u.b.read = xen_pt_byte_reg_read,
658 .u.b.write = xen_pt_byte_reg_write,
660 /* Interrupt Pin reg */
662 .offset = PCI_INTERRUPT_PIN,
667 .init = xen_pt_irqpin_reg_init,
668 .u.b.read = xen_pt_byte_reg_read,
669 .u.b.write = xen_pt_byte_reg_write,
672 /* mask of BAR need to be decided later, depends on IO/MEM type */
674 .offset = PCI_BASE_ADDRESS_0,
676 .init_val = 0x00000000,
677 .init = xen_pt_bar_reg_init,
678 .u.dw.read = xen_pt_bar_reg_read,
679 .u.dw.write = xen_pt_bar_reg_write,
683 .offset = PCI_BASE_ADDRESS_1,
685 .init_val = 0x00000000,
686 .init = xen_pt_bar_reg_init,
687 .u.dw.read = xen_pt_bar_reg_read,
688 .u.dw.write = xen_pt_bar_reg_write,
692 .offset = PCI_BASE_ADDRESS_2,
694 .init_val = 0x00000000,
695 .init = xen_pt_bar_reg_init,
696 .u.dw.read = xen_pt_bar_reg_read,
697 .u.dw.write = xen_pt_bar_reg_write,
701 .offset = PCI_BASE_ADDRESS_3,
703 .init_val = 0x00000000,
704 .init = xen_pt_bar_reg_init,
705 .u.dw.read = xen_pt_bar_reg_read,
706 .u.dw.write = xen_pt_bar_reg_write,
710 .offset = PCI_BASE_ADDRESS_4,
712 .init_val = 0x00000000,
713 .init = xen_pt_bar_reg_init,
714 .u.dw.read = xen_pt_bar_reg_read,
715 .u.dw.write = xen_pt_bar_reg_write,
719 .offset = PCI_BASE_ADDRESS_5,
721 .init_val = 0x00000000,
722 .init = xen_pt_bar_reg_init,
723 .u.dw.read = xen_pt_bar_reg_read,
724 .u.dw.write = xen_pt_bar_reg_write,
726 /* Expansion ROM BAR reg */
728 .offset = PCI_ROM_ADDRESS,
730 .init_val = 0x00000000,
731 .ro_mask = ~PCI_ROM_ADDRESS_MASK & ~PCI_ROM_ADDRESS_ENABLE,
732 .emu_mask = (uint32_t)PCI_ROM_ADDRESS_MASK,
733 .init = xen_pt_bar_reg_init,
734 .u.dw.read = xen_pt_long_reg_read,
735 .u.dw.write = xen_pt_exp_rom_bar_reg_write,
743 /*********************************
744 * Vital Product Data Capability
747 /* Vital Product Data Capability Structure reg static information table */
748 static XenPTRegInfo xen_pt_emu_reg_vpd[] = {
750 .offset = PCI_CAP_LIST_NEXT,
755 .init = xen_pt_ptr_reg_init,
756 .u.b.read = xen_pt_byte_reg_read,
757 .u.b.write = xen_pt_byte_reg_write,
760 .offset = PCI_VPD_ADDR,
764 .init = xen_pt_common_reg_init,
765 .u.w.read = xen_pt_word_reg_read,
766 .u.w.write = xen_pt_word_reg_write,
774 /**************************************
775 * Vendor Specific Capability
778 /* Vendor Specific Capability Structure reg static information table */
779 static XenPTRegInfo xen_pt_emu_reg_vendor[] = {
781 .offset = PCI_CAP_LIST_NEXT,
786 .init = xen_pt_ptr_reg_init,
787 .u.b.read = xen_pt_byte_reg_read,
788 .u.b.write = xen_pt_byte_reg_write,
796 /*****************************
797 * PCI Express Capability
800 static inline uint8_t get_capability_version(XenPCIPassthroughState *s,
803 uint8_t flags = pci_get_byte(s->dev.config + offset + PCI_EXP_FLAGS);
804 return flags & PCI_EXP_FLAGS_VERS;
807 static inline uint8_t get_device_type(XenPCIPassthroughState *s,
810 uint8_t flags = pci_get_byte(s->dev.config + offset + PCI_EXP_FLAGS);
811 return (flags & PCI_EXP_FLAGS_TYPE) >> 4;
814 /* initialize Link Control register */
815 static int xen_pt_linkctrl_reg_init(XenPCIPassthroughState *s,
816 XenPTRegInfo *reg, uint32_t real_offset,
819 uint8_t cap_ver = get_capability_version(s, real_offset - reg->offset);
820 uint8_t dev_type = get_device_type(s, real_offset - reg->offset);
822 /* no need to initialize in case of Root Complex Integrated Endpoint
825 if ((dev_type == PCI_EXP_TYPE_RC_END) && (cap_ver == 1)) {
826 *data = XEN_PT_INVALID_REG;
829 *data = reg->init_val;
832 /* initialize Device Control 2 register */
833 static int xen_pt_devctrl2_reg_init(XenPCIPassthroughState *s,
834 XenPTRegInfo *reg, uint32_t real_offset,
837 uint8_t cap_ver = get_capability_version(s, real_offset - reg->offset);
839 /* no need to initialize in case of cap_ver 1.x */
841 *data = XEN_PT_INVALID_REG;
844 *data = reg->init_val;
847 /* initialize Link Control 2 register */
848 static int xen_pt_linkctrl2_reg_init(XenPCIPassthroughState *s,
849 XenPTRegInfo *reg, uint32_t real_offset,
852 uint8_t cap_ver = get_capability_version(s, real_offset - reg->offset);
853 uint32_t reg_field = 0;
855 /* no need to initialize in case of cap_ver 1.x */
857 reg_field = XEN_PT_INVALID_REG;
859 /* set Supported Link Speed */
860 uint8_t lnkcap = pci_get_byte(s->dev.config + real_offset - reg->offset
862 reg_field |= PCI_EXP_LNKCAP_SLS & lnkcap;
869 /* PCI Express Capability Structure reg static information table */
870 static XenPTRegInfo xen_pt_emu_reg_pcie[] = {
871 /* Next Pointer reg */
873 .offset = PCI_CAP_LIST_NEXT,
878 .init = xen_pt_ptr_reg_init,
879 .u.b.read = xen_pt_byte_reg_read,
880 .u.b.write = xen_pt_byte_reg_write,
882 /* Device Capabilities reg */
884 .offset = PCI_EXP_DEVCAP,
886 .init_val = 0x00000000,
887 .ro_mask = 0xFFFFFFFF,
888 .emu_mask = 0x10000000,
889 .init = xen_pt_common_reg_init,
890 .u.dw.read = xen_pt_long_reg_read,
891 .u.dw.write = xen_pt_long_reg_write,
893 /* Device Control reg */
895 .offset = PCI_EXP_DEVCTL,
900 .init = xen_pt_common_reg_init,
901 .u.w.read = xen_pt_word_reg_read,
902 .u.w.write = xen_pt_word_reg_write,
904 /* Device Status reg */
906 .offset = PCI_EXP_DEVSTA,
910 .init = xen_pt_common_reg_init,
911 .u.w.read = xen_pt_word_reg_read,
912 .u.w.write = xen_pt_word_reg_write,
914 /* Link Control reg */
916 .offset = PCI_EXP_LNKCTL,
921 .init = xen_pt_linkctrl_reg_init,
922 .u.w.read = xen_pt_word_reg_read,
923 .u.w.write = xen_pt_word_reg_write,
925 /* Link Status reg */
927 .offset = PCI_EXP_LNKSTA,
930 .init = xen_pt_common_reg_init,
931 .u.w.read = xen_pt_word_reg_read,
932 .u.w.write = xen_pt_word_reg_write,
934 /* Device Control 2 reg */
941 .init = xen_pt_devctrl2_reg_init,
942 .u.w.read = xen_pt_word_reg_read,
943 .u.w.write = xen_pt_word_reg_write,
945 /* Link Control 2 reg */
952 .init = xen_pt_linkctrl2_reg_init,
953 .u.w.read = xen_pt_word_reg_read,
954 .u.w.write = xen_pt_word_reg_write,
962 /*********************************
963 * Power Management Capability
966 /* write Power Management Control/Status register */
967 static int xen_pt_pmcsr_reg_write(XenPCIPassthroughState *s,
968 XenPTReg *cfg_entry, uint16_t *val,
969 uint16_t dev_value, uint16_t valid_mask)
971 XenPTRegInfo *reg = cfg_entry->reg;
972 uint16_t writable_mask = 0;
973 uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
975 /* modify emulate register */
976 writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
977 cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
979 /* create value for writing to I/O device register */
980 *val = XEN_PT_MERGE_VALUE(*val, dev_value & ~PCI_PM_CTRL_PME_STATUS,
986 /* Power Management Capability reg static information table */
987 static XenPTRegInfo xen_pt_emu_reg_pm[] = {
988 /* Next Pointer reg */
990 .offset = PCI_CAP_LIST_NEXT,
995 .init = xen_pt_ptr_reg_init,
996 .u.b.read = xen_pt_byte_reg_read,
997 .u.b.write = xen_pt_byte_reg_write,
999 /* Power Management Capabilities reg */
1001 .offset = PCI_CAP_FLAGS,
1006 .init = xen_pt_common_reg_init,
1007 .u.w.read = xen_pt_word_reg_read,
1008 .u.w.write = xen_pt_word_reg_write,
1010 /* PCI Power Management Control/Status reg */
1012 .offset = PCI_PM_CTRL,
1018 .init = xen_pt_common_reg_init,
1019 .u.w.read = xen_pt_word_reg_read,
1020 .u.w.write = xen_pt_pmcsr_reg_write,
1028 /********************************
1033 #define xen_pt_msi_check_type(offset, flags, what) \
1034 ((offset) == ((flags) & PCI_MSI_FLAGS_64BIT ? \
1035 PCI_MSI_##what##_64 : PCI_MSI_##what##_32))
1037 /* Message Control register */
1038 static int xen_pt_msgctrl_reg_init(XenPCIPassthroughState *s,
1039 XenPTRegInfo *reg, uint32_t real_offset,
1042 PCIDevice *d = &s->dev;
1043 XenPTMSI *msi = s->msi;
1044 uint16_t reg_field = 0;
1046 /* use I/O device register's value as initial value */
1047 reg_field = pci_get_word(d->config + real_offset);
1049 if (reg_field & PCI_MSI_FLAGS_ENABLE) {
1050 XEN_PT_LOG(&s->dev, "MSI already enabled, disabling it first\n");
1051 xen_host_pci_set_word(&s->real_device, real_offset,
1052 reg_field & ~PCI_MSI_FLAGS_ENABLE);
1054 msi->flags |= reg_field;
1055 msi->ctrl_offset = real_offset;
1056 msi->initialized = false;
1057 msi->mapped = false;
1059 *data = reg->init_val;
1062 static int xen_pt_msgctrl_reg_write(XenPCIPassthroughState *s,
1063 XenPTReg *cfg_entry, uint16_t *val,
1064 uint16_t dev_value, uint16_t valid_mask)
1066 XenPTRegInfo *reg = cfg_entry->reg;
1067 XenPTMSI *msi = s->msi;
1068 uint16_t writable_mask = 0;
1069 uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
1071 /* Currently no support for multi-vector */
1072 if (*val & PCI_MSI_FLAGS_QSIZE) {
1073 XEN_PT_WARN(&s->dev, "Tries to set more than 1 vector ctrl %x\n", *val);
1076 /* modify emulate register */
1077 writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
1078 cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
1079 msi->flags |= cfg_entry->data & ~PCI_MSI_FLAGS_ENABLE;
1081 /* create value for writing to I/O device register */
1082 *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
1085 if (*val & PCI_MSI_FLAGS_ENABLE) {
1086 /* setup MSI pirq for the first time */
1087 if (!msi->initialized) {
1088 /* Init physical one */
1089 XEN_PT_LOG(&s->dev, "setup MSI\n");
1090 if (xen_pt_msi_setup(s)) {
1091 /* We do not broadcast the error to the framework code, so
1092 * that MSI errors are contained in MSI emulation code and
1093 * QEMU can go on running.
1094 * Guest MSI would be actually not working.
1096 *val &= ~PCI_MSI_FLAGS_ENABLE;
1097 XEN_PT_WARN(&s->dev, "Can not map MSI.\n");
1100 if (xen_pt_msi_update(s)) {
1101 *val &= ~PCI_MSI_FLAGS_ENABLE;
1102 XEN_PT_WARN(&s->dev, "Can not bind MSI\n");
1105 msi->initialized = true;
1108 msi->flags |= PCI_MSI_FLAGS_ENABLE;
1109 } else if (msi->mapped) {
1110 xen_pt_msi_disable(s);
1116 /* initialize Message Upper Address register */
1117 static int xen_pt_msgaddr64_reg_init(XenPCIPassthroughState *s,
1118 XenPTRegInfo *reg, uint32_t real_offset,
1121 /* no need to initialize in case of 32 bit type */
1122 if (!(s->msi->flags & PCI_MSI_FLAGS_64BIT)) {
1123 *data = XEN_PT_INVALID_REG;
1125 *data = reg->init_val;
1130 /* this function will be called twice (for 32 bit and 64 bit type) */
1131 /* initialize Message Data register */
1132 static int xen_pt_msgdata_reg_init(XenPCIPassthroughState *s,
1133 XenPTRegInfo *reg, uint32_t real_offset,
1136 uint32_t flags = s->msi->flags;
1137 uint32_t offset = reg->offset;
1139 /* check the offset whether matches the type or not */
1140 if (xen_pt_msi_check_type(offset, flags, DATA)) {
1141 *data = reg->init_val;
1143 *data = XEN_PT_INVALID_REG;
1148 /* this function will be called twice (for 32 bit and 64 bit type) */
1149 /* initialize Mask register */
1150 static int xen_pt_mask_reg_init(XenPCIPassthroughState *s,
1151 XenPTRegInfo *reg, uint32_t real_offset,
1154 uint32_t flags = s->msi->flags;
1156 /* check the offset whether matches the type or not */
1157 if (!(flags & PCI_MSI_FLAGS_MASKBIT)) {
1158 *data = XEN_PT_INVALID_REG;
1159 } else if (xen_pt_msi_check_type(reg->offset, flags, MASK)) {
1160 *data = reg->init_val;
1162 *data = XEN_PT_INVALID_REG;
1167 /* this function will be called twice (for 32 bit and 64 bit type) */
1168 /* initialize Pending register */
1169 static int xen_pt_pending_reg_init(XenPCIPassthroughState *s,
1170 XenPTRegInfo *reg, uint32_t real_offset,
1173 uint32_t flags = s->msi->flags;
1175 /* check the offset whether matches the type or not */
1176 if (!(flags & PCI_MSI_FLAGS_MASKBIT)) {
1177 *data = XEN_PT_INVALID_REG;
1178 } else if (xen_pt_msi_check_type(reg->offset, flags, PENDING)) {
1179 *data = reg->init_val;
1181 *data = XEN_PT_INVALID_REG;
1186 /* write Message Address register */
1187 static int xen_pt_msgaddr32_reg_write(XenPCIPassthroughState *s,
1188 XenPTReg *cfg_entry, uint32_t *val,
1189 uint32_t dev_value, uint32_t valid_mask)
1191 XenPTRegInfo *reg = cfg_entry->reg;
1192 uint32_t writable_mask = 0;
1193 uint32_t old_addr = cfg_entry->data;
1195 /* modify emulate register */
1196 writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
1197 cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
1198 s->msi->addr_lo = cfg_entry->data;
1200 /* create value for writing to I/O device register */
1201 *val = XEN_PT_MERGE_VALUE(*val, dev_value, 0);
1204 if (cfg_entry->data != old_addr) {
1205 if (s->msi->mapped) {
1206 xen_pt_msi_update(s);
1212 /* write Message Upper Address register */
1213 static int xen_pt_msgaddr64_reg_write(XenPCIPassthroughState *s,
1214 XenPTReg *cfg_entry, uint32_t *val,
1215 uint32_t dev_value, uint32_t valid_mask)
1217 XenPTRegInfo *reg = cfg_entry->reg;
1218 uint32_t writable_mask = 0;
1219 uint32_t old_addr = cfg_entry->data;
1221 /* check whether the type is 64 bit or not */
1222 if (!(s->msi->flags & PCI_MSI_FLAGS_64BIT)) {
1224 "Can't write to the upper address without 64 bit support\n");
1228 /* modify emulate register */
1229 writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
1230 cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
1231 /* update the msi_info too */
1232 s->msi->addr_hi = cfg_entry->data;
1234 /* create value for writing to I/O device register */
1235 *val = XEN_PT_MERGE_VALUE(*val, dev_value, 0);
1238 if (cfg_entry->data != old_addr) {
1239 if (s->msi->mapped) {
1240 xen_pt_msi_update(s);
1248 /* this function will be called twice (for 32 bit and 64 bit type) */
1249 /* write Message Data register */
1250 static int xen_pt_msgdata_reg_write(XenPCIPassthroughState *s,
1251 XenPTReg *cfg_entry, uint16_t *val,
1252 uint16_t dev_value, uint16_t valid_mask)
1254 XenPTRegInfo *reg = cfg_entry->reg;
1255 XenPTMSI *msi = s->msi;
1256 uint16_t writable_mask = 0;
1257 uint16_t old_data = cfg_entry->data;
1258 uint32_t offset = reg->offset;
1260 /* check the offset whether matches the type or not */
1261 if (!xen_pt_msi_check_type(offset, msi->flags, DATA)) {
1262 /* exit I/O emulator */
1263 XEN_PT_ERR(&s->dev, "the offset does not match the 32/64 bit type!\n");
1267 /* modify emulate register */
1268 writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
1269 cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
1270 /* update the msi_info too */
1271 msi->data = cfg_entry->data;
1273 /* create value for writing to I/O device register */
1274 *val = XEN_PT_MERGE_VALUE(*val, dev_value, 0);
1277 if (cfg_entry->data != old_data) {
1279 xen_pt_msi_update(s);
1286 /* MSI Capability Structure reg static information table */
1287 static XenPTRegInfo xen_pt_emu_reg_msi[] = {
1288 /* Next Pointer reg */
1290 .offset = PCI_CAP_LIST_NEXT,
1295 .init = xen_pt_ptr_reg_init,
1296 .u.b.read = xen_pt_byte_reg_read,
1297 .u.b.write = xen_pt_byte_reg_write,
1299 /* Message Control reg */
1301 .offset = PCI_MSI_FLAGS,
1307 .init = xen_pt_msgctrl_reg_init,
1308 .u.w.read = xen_pt_word_reg_read,
1309 .u.w.write = xen_pt_msgctrl_reg_write,
1311 /* Message Address reg */
1313 .offset = PCI_MSI_ADDRESS_LO,
1315 .init_val = 0x00000000,
1316 .ro_mask = 0x00000003,
1317 .emu_mask = 0xFFFFFFFF,
1318 .init = xen_pt_common_reg_init,
1319 .u.dw.read = xen_pt_long_reg_read,
1320 .u.dw.write = xen_pt_msgaddr32_reg_write,
1322 /* Message Upper Address reg (if PCI_MSI_FLAGS_64BIT set) */
1324 .offset = PCI_MSI_ADDRESS_HI,
1326 .init_val = 0x00000000,
1327 .ro_mask = 0x00000000,
1328 .emu_mask = 0xFFFFFFFF,
1329 .init = xen_pt_msgaddr64_reg_init,
1330 .u.dw.read = xen_pt_long_reg_read,
1331 .u.dw.write = xen_pt_msgaddr64_reg_write,
1333 /* Message Data reg (16 bits of data for 32-bit devices) */
1335 .offset = PCI_MSI_DATA_32,
1340 .init = xen_pt_msgdata_reg_init,
1341 .u.w.read = xen_pt_word_reg_read,
1342 .u.w.write = xen_pt_msgdata_reg_write,
1344 /* Message Data reg (16 bits of data for 64-bit devices) */
1346 .offset = PCI_MSI_DATA_64,
1351 .init = xen_pt_msgdata_reg_init,
1352 .u.w.read = xen_pt_word_reg_read,
1353 .u.w.write = xen_pt_msgdata_reg_write,
1355 /* Mask reg (if PCI_MSI_FLAGS_MASKBIT set, for 32-bit devices) */
1357 .offset = PCI_MSI_MASK_32,
1359 .init_val = 0x00000000,
1360 .ro_mask = 0xFFFFFFFF,
1361 .emu_mask = 0xFFFFFFFF,
1362 .init = xen_pt_mask_reg_init,
1363 .u.dw.read = xen_pt_long_reg_read,
1364 .u.dw.write = xen_pt_long_reg_write,
1366 /* Mask reg (if PCI_MSI_FLAGS_MASKBIT set, for 64-bit devices) */
1368 .offset = PCI_MSI_MASK_64,
1370 .init_val = 0x00000000,
1371 .ro_mask = 0xFFFFFFFF,
1372 .emu_mask = 0xFFFFFFFF,
1373 .init = xen_pt_mask_reg_init,
1374 .u.dw.read = xen_pt_long_reg_read,
1375 .u.dw.write = xen_pt_long_reg_write,
1377 /* Pending reg (if PCI_MSI_FLAGS_MASKBIT set, for 32-bit devices) */
1379 .offset = PCI_MSI_MASK_32 + 4,
1381 .init_val = 0x00000000,
1382 .ro_mask = 0xFFFFFFFF,
1383 .emu_mask = 0x00000000,
1384 .init = xen_pt_pending_reg_init,
1385 .u.dw.read = xen_pt_long_reg_read,
1386 .u.dw.write = xen_pt_long_reg_write,
1388 /* Pending reg (if PCI_MSI_FLAGS_MASKBIT set, for 64-bit devices) */
1390 .offset = PCI_MSI_MASK_64 + 4,
1392 .init_val = 0x00000000,
1393 .ro_mask = 0xFFFFFFFF,
1394 .emu_mask = 0x00000000,
1395 .init = xen_pt_pending_reg_init,
1396 .u.dw.read = xen_pt_long_reg_read,
1397 .u.dw.write = xen_pt_long_reg_write,
1405 /**************************************
1409 /* Message Control register for MSI-X */
1410 static int xen_pt_msixctrl_reg_init(XenPCIPassthroughState *s,
1411 XenPTRegInfo *reg, uint32_t real_offset,
1414 PCIDevice *d = &s->dev;
1415 uint16_t reg_field = 0;
1417 /* use I/O device register's value as initial value */
1418 reg_field = pci_get_word(d->config + real_offset);
1420 if (reg_field & PCI_MSIX_FLAGS_ENABLE) {
1421 XEN_PT_LOG(d, "MSIX already enabled, disabling it first\n");
1422 xen_host_pci_set_word(&s->real_device, real_offset,
1423 reg_field & ~PCI_MSIX_FLAGS_ENABLE);
1426 s->msix->ctrl_offset = real_offset;
1428 *data = reg->init_val;
1431 static int xen_pt_msixctrl_reg_write(XenPCIPassthroughState *s,
1432 XenPTReg *cfg_entry, uint16_t *val,
1433 uint16_t dev_value, uint16_t valid_mask)
1435 XenPTRegInfo *reg = cfg_entry->reg;
1436 uint16_t writable_mask = 0;
1437 uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
1438 int debug_msix_enabled_old;
1440 /* modify emulate register */
1441 writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
1442 cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
1444 /* create value for writing to I/O device register */
1445 *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
1448 if ((*val & PCI_MSIX_FLAGS_ENABLE)
1449 && !(*val & PCI_MSIX_FLAGS_MASKALL)) {
1450 xen_pt_msix_update(s);
1451 } else if (!(*val & PCI_MSIX_FLAGS_ENABLE) && s->msix->enabled) {
1452 xen_pt_msix_disable(s);
1455 debug_msix_enabled_old = s->msix->enabled;
1456 s->msix->enabled = !!(*val & PCI_MSIX_FLAGS_ENABLE);
1457 if (s->msix->enabled != debug_msix_enabled_old) {
1458 XEN_PT_LOG(&s->dev, "%s MSI-X\n",
1459 s->msix->enabled ? "enable" : "disable");
1465 /* MSI-X Capability Structure reg static information table */
1466 static XenPTRegInfo xen_pt_emu_reg_msix[] = {
1467 /* Next Pointer reg */
1469 .offset = PCI_CAP_LIST_NEXT,
1474 .init = xen_pt_ptr_reg_init,
1475 .u.b.read = xen_pt_byte_reg_read,
1476 .u.b.write = xen_pt_byte_reg_write,
1478 /* Message Control reg */
1480 .offset = PCI_MSI_FLAGS,
1486 .init = xen_pt_msixctrl_reg_init,
1487 .u.w.read = xen_pt_word_reg_read,
1488 .u.w.write = xen_pt_msixctrl_reg_write,
1496 /****************************
1500 /* capability structure register group size functions */
1502 static int xen_pt_reg_grp_size_init(XenPCIPassthroughState *s,
1503 const XenPTRegGroupInfo *grp_reg,
1504 uint32_t base_offset, uint8_t *size)
1506 *size = grp_reg->grp_size;
1509 /* get Vendor Specific Capability Structure register group size */
1510 static int xen_pt_vendor_size_init(XenPCIPassthroughState *s,
1511 const XenPTRegGroupInfo *grp_reg,
1512 uint32_t base_offset, uint8_t *size)
1514 *size = pci_get_byte(s->dev.config + base_offset + 0x02);
1517 /* get PCI Express Capability Structure register group size */
1518 static int xen_pt_pcie_size_init(XenPCIPassthroughState *s,
1519 const XenPTRegGroupInfo *grp_reg,
1520 uint32_t base_offset, uint8_t *size)
1522 PCIDevice *d = &s->dev;
1523 uint8_t version = get_capability_version(s, base_offset);
1524 uint8_t type = get_device_type(s, base_offset);
1525 uint8_t pcie_size = 0;
1528 /* calculate size depend on capability version and device/port type */
1529 /* in case of PCI Express Base Specification Rev 1.x */
1531 /* The PCI Express Capabilities, Device Capabilities, and Device
1532 * Status/Control registers are required for all PCI Express devices.
1533 * The Link Capabilities and Link Status/Control are required for all
1534 * Endpoints that are not Root Complex Integrated Endpoints. Endpoints
1535 * are not required to implement registers other than those listed
1536 * above and terminate the capability structure.
1539 case PCI_EXP_TYPE_ENDPOINT:
1540 case PCI_EXP_TYPE_LEG_END:
1543 case PCI_EXP_TYPE_RC_END:
1547 /* only EndPoint passthrough is supported */
1548 case PCI_EXP_TYPE_ROOT_PORT:
1549 case PCI_EXP_TYPE_UPSTREAM:
1550 case PCI_EXP_TYPE_DOWNSTREAM:
1551 case PCI_EXP_TYPE_PCI_BRIDGE:
1552 case PCI_EXP_TYPE_PCIE_BRIDGE:
1553 case PCI_EXP_TYPE_RC_EC:
1555 XEN_PT_ERR(d, "Unsupported device/port type %#x.\n", type);
1559 /* in case of PCI Express Base Specification Rev 2.0 */
1560 else if (version == 2) {
1562 case PCI_EXP_TYPE_ENDPOINT:
1563 case PCI_EXP_TYPE_LEG_END:
1564 case PCI_EXP_TYPE_RC_END:
1565 /* For Functions that do not implement the registers,
1566 * these spaces must be hardwired to 0b.
1570 /* only EndPoint passthrough is supported */
1571 case PCI_EXP_TYPE_ROOT_PORT:
1572 case PCI_EXP_TYPE_UPSTREAM:
1573 case PCI_EXP_TYPE_DOWNSTREAM:
1574 case PCI_EXP_TYPE_PCI_BRIDGE:
1575 case PCI_EXP_TYPE_PCIE_BRIDGE:
1576 case PCI_EXP_TYPE_RC_EC:
1578 XEN_PT_ERR(d, "Unsupported device/port type %#x.\n", type);
1582 XEN_PT_ERR(d, "Unsupported capability version %#x.\n", version);
1589 /* get MSI Capability Structure register group size */
1590 static int xen_pt_msi_size_init(XenPCIPassthroughState *s,
1591 const XenPTRegGroupInfo *grp_reg,
1592 uint32_t base_offset, uint8_t *size)
1594 PCIDevice *d = &s->dev;
1595 uint16_t msg_ctrl = 0;
1596 uint8_t msi_size = 0xa;
1598 msg_ctrl = pci_get_word(d->config + (base_offset + PCI_MSI_FLAGS));
1600 /* check if 64-bit address is capable of per-vector masking */
1601 if (msg_ctrl & PCI_MSI_FLAGS_64BIT) {
1604 if (msg_ctrl & PCI_MSI_FLAGS_MASKBIT) {
1608 s->msi = g_new0(XenPTMSI, 1);
1609 s->msi->pirq = XEN_PT_UNASSIGNED_PIRQ;
1614 /* get MSI-X Capability Structure register group size */
1615 static int xen_pt_msix_size_init(XenPCIPassthroughState *s,
1616 const XenPTRegGroupInfo *grp_reg,
1617 uint32_t base_offset, uint8_t *size)
1621 rc = xen_pt_msix_init(s, base_offset);
1624 XEN_PT_ERR(&s->dev, "Internal error: Invalid xen_pt_msix_init.\n");
1628 *size = grp_reg->grp_size;
1633 static const XenPTRegGroupInfo xen_pt_emu_reg_grps[] = {
1634 /* Header Type0 reg group */
1637 .grp_type = XEN_PT_GRP_TYPE_EMU,
1639 .size_init = xen_pt_reg_grp_size_init,
1640 .emu_regs = xen_pt_emu_reg_header0,
1642 /* PCI PowerManagement Capability reg group */
1644 .grp_id = PCI_CAP_ID_PM,
1645 .grp_type = XEN_PT_GRP_TYPE_EMU,
1646 .grp_size = PCI_PM_SIZEOF,
1647 .size_init = xen_pt_reg_grp_size_init,
1648 .emu_regs = xen_pt_emu_reg_pm,
1650 /* AGP Capability Structure reg group */
1652 .grp_id = PCI_CAP_ID_AGP,
1653 .grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
1655 .size_init = xen_pt_reg_grp_size_init,
1657 /* Vital Product Data Capability Structure reg group */
1659 .grp_id = PCI_CAP_ID_VPD,
1660 .grp_type = XEN_PT_GRP_TYPE_EMU,
1662 .size_init = xen_pt_reg_grp_size_init,
1663 .emu_regs = xen_pt_emu_reg_vpd,
1665 /* Slot Identification reg group */
1667 .grp_id = PCI_CAP_ID_SLOTID,
1668 .grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
1670 .size_init = xen_pt_reg_grp_size_init,
1672 /* MSI Capability Structure reg group */
1674 .grp_id = PCI_CAP_ID_MSI,
1675 .grp_type = XEN_PT_GRP_TYPE_EMU,
1677 .size_init = xen_pt_msi_size_init,
1678 .emu_regs = xen_pt_emu_reg_msi,
1680 /* PCI-X Capabilities List Item reg group */
1682 .grp_id = PCI_CAP_ID_PCIX,
1683 .grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
1685 .size_init = xen_pt_reg_grp_size_init,
1687 /* Vendor Specific Capability Structure reg group */
1689 .grp_id = PCI_CAP_ID_VNDR,
1690 .grp_type = XEN_PT_GRP_TYPE_EMU,
1692 .size_init = xen_pt_vendor_size_init,
1693 .emu_regs = xen_pt_emu_reg_vendor,
1695 /* SHPC Capability List Item reg group */
1697 .grp_id = PCI_CAP_ID_SHPC,
1698 .grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
1700 .size_init = xen_pt_reg_grp_size_init,
1702 /* Subsystem ID and Subsystem Vendor ID Capability List Item reg group */
1704 .grp_id = PCI_CAP_ID_SSVID,
1705 .grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
1707 .size_init = xen_pt_reg_grp_size_init,
1709 /* AGP 8x Capability Structure reg group */
1711 .grp_id = PCI_CAP_ID_AGP3,
1712 .grp_type = XEN_PT_GRP_TYPE_HARDWIRED,
1714 .size_init = xen_pt_reg_grp_size_init,
1716 /* PCI Express Capability Structure reg group */
1718 .grp_id = PCI_CAP_ID_EXP,
1719 .grp_type = XEN_PT_GRP_TYPE_EMU,
1721 .size_init = xen_pt_pcie_size_init,
1722 .emu_regs = xen_pt_emu_reg_pcie,
1724 /* MSI-X Capability Structure reg group */
1726 .grp_id = PCI_CAP_ID_MSIX,
1727 .grp_type = XEN_PT_GRP_TYPE_EMU,
1729 .size_init = xen_pt_msix_size_init,
1730 .emu_regs = xen_pt_emu_reg_msix,
1737 /* initialize Capabilities Pointer or Next Pointer register */
1738 static int xen_pt_ptr_reg_init(XenPCIPassthroughState *s,
1739 XenPTRegInfo *reg, uint32_t real_offset,
1743 uint8_t *config = s->dev.config;
1744 uint32_t reg_field = pci_get_byte(config + real_offset);
1747 /* find capability offset */
1749 for (i = 0; xen_pt_emu_reg_grps[i].grp_size != 0; i++) {
1750 if (xen_pt_hide_dev_cap(&s->real_device,
1751 xen_pt_emu_reg_grps[i].grp_id)) {
1755 cap_id = pci_get_byte(config + reg_field + PCI_CAP_LIST_ID);
1756 if (xen_pt_emu_reg_grps[i].grp_id == cap_id) {
1757 if (xen_pt_emu_reg_grps[i].grp_type == XEN_PT_GRP_TYPE_EMU) {
1760 /* ignore the 0 hardwired capability, find next one */
1765 /* next capability */
1766 reg_field = pci_get_byte(config + reg_field + PCI_CAP_LIST_NEXT);
1779 static uint8_t find_cap_offset(XenPCIPassthroughState *s, uint8_t cap)
1782 unsigned max_cap = PCI_CAP_MAX;
1783 uint8_t pos = PCI_CAPABILITY_LIST;
1786 if (xen_host_pci_get_byte(&s->real_device, PCI_STATUS, &status)) {
1789 if ((status & PCI_STATUS_CAP_LIST) == 0) {
1794 if (xen_host_pci_get_byte(&s->real_device, pos, &pos)) {
1797 if (pos < PCI_CONFIG_HEADER_SIZE) {
1802 if (xen_host_pci_get_byte(&s->real_device,
1803 pos + PCI_CAP_LIST_ID, &id)) {
1814 pos += PCI_CAP_LIST_NEXT;
1819 static int xen_pt_config_reg_init(XenPCIPassthroughState *s,
1820 XenPTRegGroup *reg_grp, XenPTRegInfo *reg)
1822 XenPTReg *reg_entry;
1826 reg_entry = g_new0(XenPTReg, 1);
1827 reg_entry->reg = reg;
1830 /* initialize emulate register */
1831 rc = reg->init(s, reg_entry->reg,
1832 reg_grp->base_offset + reg->offset, &data);
1837 if (data == XEN_PT_INVALID_REG) {
1838 /* free unused BAR register entry */
1842 /* set register value */
1843 reg_entry->data = data;
1845 /* list add register entry */
1846 QLIST_INSERT_HEAD(®_grp->reg_tbl_list, reg_entry, entries);
1851 int xen_pt_config_init(XenPCIPassthroughState *s)
1855 QLIST_INIT(&s->reg_grps);
1857 for (i = 0; xen_pt_emu_reg_grps[i].grp_size != 0; i++) {
1858 uint32_t reg_grp_offset = 0;
1859 XenPTRegGroup *reg_grp_entry = NULL;
1861 if (xen_pt_emu_reg_grps[i].grp_id != 0xFF) {
1862 if (xen_pt_hide_dev_cap(&s->real_device,
1863 xen_pt_emu_reg_grps[i].grp_id)) {
1867 reg_grp_offset = find_cap_offset(s, xen_pt_emu_reg_grps[i].grp_id);
1869 if (!reg_grp_offset) {
1874 reg_grp_entry = g_new0(XenPTRegGroup, 1);
1875 QLIST_INIT(®_grp_entry->reg_tbl_list);
1876 QLIST_INSERT_HEAD(&s->reg_grps, reg_grp_entry, entries);
1878 reg_grp_entry->base_offset = reg_grp_offset;
1879 reg_grp_entry->reg_grp = xen_pt_emu_reg_grps + i;
1880 if (xen_pt_emu_reg_grps[i].size_init) {
1881 /* get register group size */
1882 rc = xen_pt_emu_reg_grps[i].size_init(s, reg_grp_entry->reg_grp,
1884 ®_grp_entry->size);
1886 xen_pt_config_delete(s);
1891 if (xen_pt_emu_reg_grps[i].grp_type == XEN_PT_GRP_TYPE_EMU) {
1892 if (xen_pt_emu_reg_grps[i].emu_regs) {
1894 XenPTRegInfo *regs = xen_pt_emu_reg_grps[i].emu_regs;
1895 /* initialize capability register */
1896 for (j = 0; regs->size != 0; j++, regs++) {
1897 /* initialize capability register */
1898 rc = xen_pt_config_reg_init(s, reg_grp_entry, regs);
1900 xen_pt_config_delete(s);
1911 /* delete all emulate register */
1912 void xen_pt_config_delete(XenPCIPassthroughState *s)
1914 struct XenPTRegGroup *reg_group, *next_grp;
1915 struct XenPTReg *reg, *next_reg;
1917 /* free MSI/MSI-X info table */
1919 xen_pt_msix_delete(s);
1925 /* free all register group entry */
1926 QLIST_FOREACH_SAFE(reg_group, &s->reg_grps, entries, next_grp) {
1927 /* free all register entry */
1928 QLIST_FOREACH_SAFE(reg, ®_group->reg_tbl_list, entries, next_reg) {
1929 QLIST_REMOVE(reg, entries);
1933 QLIST_REMOVE(reg_group, entries);