4 #include "hw/xen/xen_common.h"
5 #include "xen-host-pci-device.h"
6 #include "qom/object.h"
8 bool xen_igd_gfx_pt_enabled(void);
9 void xen_igd_gfx_pt_set(bool value, Error **errp);
11 void xen_pt_log(const PCIDevice *d, const char *f, ...) G_GNUC_PRINTF(2, 3);
13 #define XEN_PT_ERR(d, _f, _a...) xen_pt_log(d, "%s: Error: "_f, __func__, ##_a)
15 #ifdef XEN_PT_LOGGING_ENABLED
16 # define XEN_PT_LOG(d, _f, _a...) xen_pt_log(d, "%s: " _f, __func__, ##_a)
17 # define XEN_PT_WARN(d, _f, _a...) \
18 xen_pt_log(d, "%s: Warning: "_f, __func__, ##_a)
20 # define XEN_PT_LOG(d, _f, _a...)
21 # define XEN_PT_WARN(d, _f, _a...)
24 #ifdef XEN_PT_DEBUG_PCI_CONFIG_ACCESS
25 # define XEN_PT_LOG_CONFIG(d, addr, val, len) \
26 xen_pt_log(d, "%s: address=0x%04x val=0x%08x len=%d\n", \
27 __func__, addr, val, len)
29 # define XEN_PT_LOG_CONFIG(d, addr, val, len)
34 #define XEN_PFN(x) ((x) >> XC_PAGE_SHIFT)
36 typedef const struct XenPTRegInfo XenPTRegInfo;
37 typedef struct XenPTReg XenPTReg;
40 #define TYPE_XEN_PT_DEVICE "xen-pci-passthrough"
41 OBJECT_DECLARE_SIMPLE_TYPE(XenPCIPassthroughState, XEN_PT_DEVICE)
43 uint32_t igd_read_opregion(XenPCIPassthroughState *s);
44 void igd_write_opregion(XenPCIPassthroughState *s, uint32_t val);
45 void xen_igd_passthrough_isa_bridge_create(XenPCIPassthroughState *s,
46 XenHostPCIDevice *dev);
48 /* function type for config reg */
49 typedef int (*xen_pt_conf_reg_init)
50 (XenPCIPassthroughState *, XenPTRegInfo *, uint32_t real_offset,
52 typedef int (*xen_pt_conf_dword_write)
53 (XenPCIPassthroughState *, XenPTReg *cfg_entry,
54 uint32_t *val, uint32_t dev_value, uint32_t valid_mask);
55 typedef int (*xen_pt_conf_word_write)
56 (XenPCIPassthroughState *, XenPTReg *cfg_entry,
57 uint16_t *val, uint16_t dev_value, uint16_t valid_mask);
58 typedef int (*xen_pt_conf_byte_write)
59 (XenPCIPassthroughState *, XenPTReg *cfg_entry,
60 uint8_t *val, uint8_t dev_value, uint8_t valid_mask);
61 typedef int (*xen_pt_conf_dword_read)
62 (XenPCIPassthroughState *, XenPTReg *cfg_entry,
63 uint32_t *val, uint32_t valid_mask);
64 typedef int (*xen_pt_conf_word_read)
65 (XenPCIPassthroughState *, XenPTReg *cfg_entry,
66 uint16_t *val, uint16_t valid_mask);
67 typedef int (*xen_pt_conf_byte_read)
68 (XenPCIPassthroughState *, XenPTReg *cfg_entry,
69 uint8_t *val, uint8_t valid_mask);
71 #define XEN_PT_BAR_ALLF 0xFFFFFFFF
72 #define XEN_PT_BAR_UNMAPPED (-1)
74 #define XEN_PCI_CAP_MAX 48
76 #define XEN_PCI_INTEL_OPREGION 0xfc
79 XEN_PT_GRP_TYPE_HARDWIRED = 0, /* 0 Hardwired reg group */
80 XEN_PT_GRP_TYPE_EMU, /* emul reg group */
81 } XenPTRegisterGroupType;
84 XEN_PT_BAR_FLAG_MEM = 0, /* Memory type BAR */
85 XEN_PT_BAR_FLAG_IO, /* I/O type BAR */
86 XEN_PT_BAR_FLAG_UPPER, /* upper 64bit BAR */
87 XEN_PT_BAR_FLAG_UNUSED, /* unused BAR */
91 typedef struct XenPTRegion {
93 XenPTBarFlag bar_flag;
94 /* Translation of the emulated address */
102 /* XenPTRegInfo declaration
103 * - only for emulated register (either a part or whole bit).
104 * - for passthrough register that need special behavior (like interacting with
105 * other component), set emu_mask to all 0 and specify r/w func properly.
106 * - do NOT use ALL F for init_val, otherwise the tbl will not be registered.
109 /* emulated register information */
110 struct XenPTRegInfo {
114 /* reg reserved field mask (ON:reserved, OFF:defined) */
116 /* reg read only field mask (ON:RO/ROS, OFF:other) */
118 /* reg read/write-1-clear field mask (ON:RW1C/RW1CS, OFF:other) */
120 /* reg emulate field mask (ON:emu, OFF:passthrough) */
122 xen_pt_conf_reg_init init;
123 /* read/write function pointer
124 * for double_word/word/byte size */
127 xen_pt_conf_dword_write write;
128 xen_pt_conf_dword_read read;
131 xen_pt_conf_word_write write;
132 xen_pt_conf_word_read read;
135 xen_pt_conf_byte_write write;
136 xen_pt_conf_byte_read read;
141 /* emulated register management */
143 QLIST_ENTRY(XenPTReg) entries;
149 } ptr; /* pointer to dev.config. */
152 typedef const struct XenPTRegGroupInfo XenPTRegGroupInfo;
154 /* emul reg group size initialize method */
155 typedef int (*xen_pt_reg_size_init_fn)
156 (XenPCIPassthroughState *, XenPTRegGroupInfo *,
157 uint32_t base_offset, uint8_t *size);
159 /* emulated register group information */
160 struct XenPTRegGroupInfo {
162 XenPTRegisterGroupType grp_type;
164 xen_pt_reg_size_init_fn size_init;
165 XenPTRegInfo *emu_regs;
168 /* emul register group management table */
169 typedef struct XenPTRegGroup {
170 QLIST_ENTRY(XenPTRegGroup) entries;
171 XenPTRegGroupInfo *reg_grp;
172 uint32_t base_offset;
174 QLIST_HEAD(, XenPTReg) reg_tbl_list;
178 #define XEN_PT_UNASSIGNED_PIRQ (-1)
179 typedef struct XenPTMSI {
181 uint32_t addr_lo; /* guest message address */
182 uint32_t addr_hi; /* guest message upper address */
183 uint16_t data; /* guest message data */
184 uint32_t ctrl_offset; /* saved control offset */
185 uint32_t mask; /* guest mask bits */
186 int pirq; /* guest pirq corresponding */
187 bool initialized; /* when guest MSI is initialized */
188 bool mapped; /* when pirq is mapped */
191 typedef struct XenPTMSIXEntry {
196 bool updated; /* indicate whether MSI ADDR or DATA is updated */
198 typedef struct XenPTMSIX {
199 uint32_t ctrl_offset;
205 uint32_t table_offset_adjust; /* page align mmap */
206 uint64_t mmio_base_addr;
208 void *phys_iomem_base;
209 XenPTMSIXEntry msix_entry[];
212 struct XenPCIPassthroughState {
215 PCIHostDeviceAddress hostaddr;
218 bool permissive_warned;
219 XenHostPCIDevice real_device;
220 XenPTRegion bases[PCI_NUM_REGIONS]; /* Access regions */
221 QLIST_HEAD(, XenPTRegGroup) reg_grps;
223 uint32_t machine_irq;
228 MemoryRegion bar[PCI_NUM_REGIONS - 1];
231 MemoryListener memory_listener;
232 MemoryListener io_listener;
236 void xen_pt_config_init(XenPCIPassthroughState *s, Error **errp);
237 void xen_pt_config_delete(XenPCIPassthroughState *s);
238 XenPTRegGroup *xen_pt_find_reg_grp(XenPCIPassthroughState *s, uint32_t address);
239 XenPTReg *xen_pt_find_reg(XenPTRegGroup *reg_grp, uint32_t address);
240 int xen_pt_bar_offset_to_index(uint32_t offset);
242 static inline pcibus_t xen_pt_get_emul_size(XenPTBarFlag flag, pcibus_t r_size)
244 /* align resource size (memory type only) */
245 if (flag == XEN_PT_BAR_FLAG_MEM) {
246 return (r_size + XC_PAGE_SIZE - 1) & XC_PAGE_MASK;
253 /* The PCI Local Bus Specification, Rev. 3.0,
254 * Section 6.2.4 Miscellaneous Registers, pp 223
255 * outlines 5 valid values for the interrupt pin (intx).
256 * 0: For devices (or device functions) that don't use an interrupt in
262 * Xen uses the following 4 values for intx
268 * Observing that these list of values are not the same, xen_pt_pci_read_intx()
269 * uses the following mapping from hw to xen values.
270 * This seems to reflect the current usage within Xen.
272 * PCI hardware | Xen | Notes
273 * ----------------+-----+----------------------------------------------------
274 * 0 | 0 | No interrupt
279 * any other value | 0 | This should never happen, log error message
282 static inline uint8_t xen_pt_pci_read_intx(XenPCIPassthroughState *s)
285 xen_host_pci_get_byte(&s->real_device, PCI_INTERRUPT_PIN, &v);
289 static inline uint8_t xen_pt_pci_intx(XenPCIPassthroughState *s)
291 uint8_t r_val = xen_pt_pci_read_intx(s);
293 XEN_PT_LOG(&s->dev, "intx=%i\n", r_val);
294 if (r_val < 1 || r_val > 4) {
295 XEN_PT_LOG(&s->dev, "Interrupt pin read from hardware is out of range:"
296 " value=%i, acceptable range is 1 - 4\n", r_val);
299 /* Note that if s.real_device.config_fd is closed we make 0xff. */
307 int xen_pt_msi_setup(XenPCIPassthroughState *s);
308 int xen_pt_msi_update(XenPCIPassthroughState *d);
309 void xen_pt_msi_disable(XenPCIPassthroughState *s);
311 int xen_pt_msix_init(XenPCIPassthroughState *s, uint32_t base);
312 void xen_pt_msix_delete(XenPCIPassthroughState *s);
313 void xen_pt_msix_unmap(XenPCIPassthroughState *s);
314 int xen_pt_msix_update(XenPCIPassthroughState *s);
315 int xen_pt_msix_update_remap(XenPCIPassthroughState *s, int bar_index);
316 void xen_pt_msix_disable(XenPCIPassthroughState *s);
318 static inline bool xen_pt_has_msix_mapping(XenPCIPassthroughState *s, int bar)
320 return s->msix && s->msix->bar_index == bar;
323 extern void *pci_assign_dev_load_option_rom(PCIDevice *dev,
326 unsigned int bus, unsigned int slot,
327 unsigned int function);
328 static inline bool is_igd_vga_passthrough(XenHostPCIDevice *dev)
330 return (xen_igd_gfx_pt_enabled()
331 && ((dev->class_code >> 0x8) == PCI_CLASS_DISPLAY_VGA));
333 int xen_pt_register_vga_regions(XenHostPCIDevice *dev);
334 int xen_pt_unregister_vga_regions(XenHostPCIDevice *dev);
335 void xen_pt_setup_vga(XenPCIPassthroughState *s, XenHostPCIDevice *dev,
337 #endif /* XEN_PT_H */