4 #include "qemu-common.h"
5 #include "hw/xen/xen_common.h"
6 #include "hw/pci/pci.h"
7 #include "xen-host-pci-device.h"
9 void xen_pt_log(const PCIDevice *d, const char *f, ...) GCC_FMT_ATTR(2, 3);
11 #define XEN_PT_ERR(d, _f, _a...) xen_pt_log(d, "%s: Error: "_f, __func__, ##_a)
13 #ifdef XEN_PT_LOGGING_ENABLED
14 # define XEN_PT_LOG(d, _f, _a...) xen_pt_log(d, "%s: " _f, __func__, ##_a)
15 # define XEN_PT_WARN(d, _f, _a...) \
16 xen_pt_log(d, "%s: Warning: "_f, __func__, ##_a)
18 # define XEN_PT_LOG(d, _f, _a...)
19 # define XEN_PT_WARN(d, _f, _a...)
22 #ifdef XEN_PT_DEBUG_PCI_CONFIG_ACCESS
23 # define XEN_PT_LOG_CONFIG(d, addr, val, len) \
24 xen_pt_log(d, "%s: address=0x%04x val=0x%08x len=%d\n", \
25 __func__, addr, val, len)
27 # define XEN_PT_LOG_CONFIG(d, addr, val, len)
32 #define XEN_PFN(x) ((x) >> XC_PAGE_SHIFT)
34 typedef const struct XenPTRegInfo XenPTRegInfo;
35 typedef struct XenPTReg XenPTReg;
37 typedef struct XenPCIPassthroughState XenPCIPassthroughState;
39 #define TYPE_XEN_PT_DEVICE "xen-pci-passthrough"
40 #define XEN_PT_DEVICE(obj) \
41 OBJECT_CHECK(XenPCIPassthroughState, (obj), TYPE_XEN_PT_DEVICE)
43 /* function type for config reg */
44 typedef int (*xen_pt_conf_reg_init)
45 (XenPCIPassthroughState *, XenPTRegInfo *, uint32_t real_offset,
47 typedef int (*xen_pt_conf_dword_write)
48 (XenPCIPassthroughState *, XenPTReg *cfg_entry,
49 uint32_t *val, uint32_t dev_value, uint32_t valid_mask);
50 typedef int (*xen_pt_conf_word_write)
51 (XenPCIPassthroughState *, XenPTReg *cfg_entry,
52 uint16_t *val, uint16_t dev_value, uint16_t valid_mask);
53 typedef int (*xen_pt_conf_byte_write)
54 (XenPCIPassthroughState *, XenPTReg *cfg_entry,
55 uint8_t *val, uint8_t dev_value, uint8_t valid_mask);
56 typedef int (*xen_pt_conf_dword_read)
57 (XenPCIPassthroughState *, XenPTReg *cfg_entry,
58 uint32_t *val, uint32_t valid_mask);
59 typedef int (*xen_pt_conf_word_read)
60 (XenPCIPassthroughState *, XenPTReg *cfg_entry,
61 uint16_t *val, uint16_t valid_mask);
62 typedef int (*xen_pt_conf_byte_read)
63 (XenPCIPassthroughState *, XenPTReg *cfg_entry,
64 uint8_t *val, uint8_t valid_mask);
66 #define XEN_PT_BAR_ALLF 0xFFFFFFFF
67 #define XEN_PT_BAR_UNMAPPED (-1)
69 #define PCI_CAP_MAX 48
73 XEN_PT_GRP_TYPE_HARDWIRED = 0, /* 0 Hardwired reg group */
74 XEN_PT_GRP_TYPE_EMU, /* emul reg group */
75 } XenPTRegisterGroupType;
78 XEN_PT_BAR_FLAG_MEM = 0, /* Memory type BAR */
79 XEN_PT_BAR_FLAG_IO, /* I/O type BAR */
80 XEN_PT_BAR_FLAG_UPPER, /* upper 64bit BAR */
81 XEN_PT_BAR_FLAG_UNUSED, /* unused BAR */
85 typedef struct XenPTRegion {
87 XenPTBarFlag bar_flag;
88 /* Translation of the emulated address */
96 /* XenPTRegInfo declaration
97 * - only for emulated register (either a part or whole bit).
98 * - for passthrough register that need special behavior (like interacting with
99 * other component), set emu_mask to all 0 and specify r/w func properly.
100 * - do NOT use ALL F for init_val, otherwise the tbl will not be registered.
103 /* emulated register information */
104 struct XenPTRegInfo {
108 /* reg reserved field mask (ON:reserved, OFF:defined) */
110 /* reg read only field mask (ON:RO/ROS, OFF:other) */
112 /* reg emulate field mask (ON:emu, OFF:passthrough) */
114 xen_pt_conf_reg_init init;
115 /* read/write function pointer
116 * for double_word/word/byte size */
119 xen_pt_conf_dword_write write;
120 xen_pt_conf_dword_read read;
123 xen_pt_conf_word_write write;
124 xen_pt_conf_word_read read;
127 xen_pt_conf_byte_write write;
128 xen_pt_conf_byte_read read;
133 /* emulated register management */
135 QLIST_ENTRY(XenPTReg) entries;
137 uint32_t data; /* emulated value */
140 typedef const struct XenPTRegGroupInfo XenPTRegGroupInfo;
142 /* emul reg group size initialize method */
143 typedef int (*xen_pt_reg_size_init_fn)
144 (XenPCIPassthroughState *, XenPTRegGroupInfo *,
145 uint32_t base_offset, uint8_t *size);
147 /* emulated register group information */
148 struct XenPTRegGroupInfo {
150 XenPTRegisterGroupType grp_type;
152 xen_pt_reg_size_init_fn size_init;
153 XenPTRegInfo *emu_regs;
156 /* emul register group management table */
157 typedef struct XenPTRegGroup {
158 QLIST_ENTRY(XenPTRegGroup) entries;
159 XenPTRegGroupInfo *reg_grp;
160 uint32_t base_offset;
162 QLIST_HEAD(, XenPTReg) reg_tbl_list;
166 #define XEN_PT_UNASSIGNED_PIRQ (-1)
167 typedef struct XenPTMSI {
169 uint32_t addr_lo; /* guest message address */
170 uint32_t addr_hi; /* guest message upper address */
171 uint16_t data; /* guest message data */
172 uint32_t ctrl_offset; /* saved control offset */
173 int pirq; /* guest pirq corresponding */
174 bool initialized; /* when guest MSI is initialized */
175 bool mapped; /* when pirq is mapped */
178 typedef struct XenPTMSIXEntry {
182 uint32_t vector_ctrl;
183 bool updated; /* indicate whether MSI ADDR or DATA is updated */
184 bool warned; /* avoid issuing (bogus) warning more than once */
186 typedef struct XenPTMSIX {
187 uint32_t ctrl_offset;
192 uint32_t table_offset_adjust; /* page align mmap */
193 uint64_t mmio_base_addr;
195 void *phys_iomem_base;
196 XenPTMSIXEntry msix_entry[0];
199 struct XenPCIPassthroughState {
202 PCIHostDeviceAddress hostaddr;
205 bool permissive_warned;
206 XenHostPCIDevice real_device;
207 XenPTRegion bases[PCI_NUM_REGIONS]; /* Access regions */
208 QLIST_HEAD(, XenPTRegGroup) reg_grps;
210 uint32_t machine_irq;
215 MemoryRegion bar[PCI_NUM_REGIONS - 1];
218 MemoryListener memory_listener;
219 MemoryListener io_listener;
222 int xen_pt_config_init(XenPCIPassthroughState *s);
223 void xen_pt_config_delete(XenPCIPassthroughState *s);
224 XenPTRegGroup *xen_pt_find_reg_grp(XenPCIPassthroughState *s, uint32_t address);
225 XenPTReg *xen_pt_find_reg(XenPTRegGroup *reg_grp, uint32_t address);
226 int xen_pt_bar_offset_to_index(uint32_t offset);
228 static inline pcibus_t xen_pt_get_emul_size(XenPTBarFlag flag, pcibus_t r_size)
230 /* align resource size (memory type only) */
231 if (flag == XEN_PT_BAR_FLAG_MEM) {
232 return (r_size + XC_PAGE_SIZE - 1) & XC_PAGE_MASK;
239 /* The PCI Local Bus Specification, Rev. 3.0,
240 * Section 6.2.4 Miscellaneous Registers, pp 223
241 * outlines 5 valid values for the interrupt pin (intx).
242 * 0: For devices (or device functions) that don't use an interrupt in
248 * Xen uses the following 4 values for intx
254 * Observing that these list of values are not the same, xen_pt_pci_read_intx()
255 * uses the following mapping from hw to xen values.
256 * This seems to reflect the current usage within Xen.
258 * PCI hardware | Xen | Notes
259 * ----------------+-----+----------------------------------------------------
260 * 0 | 0 | No interrupt
265 * any other value | 0 | This should never happen, log error message
268 static inline uint8_t xen_pt_pci_read_intx(XenPCIPassthroughState *s)
271 xen_host_pci_get_byte(&s->real_device, PCI_INTERRUPT_PIN, &v);
275 static inline uint8_t xen_pt_pci_intx(XenPCIPassthroughState *s)
277 uint8_t r_val = xen_pt_pci_read_intx(s);
279 XEN_PT_LOG(&s->dev, "intx=%i\n", r_val);
280 if (r_val < 1 || r_val > 4) {
281 XEN_PT_LOG(&s->dev, "Interrupt pin read from hardware is out of range:"
282 " value=%i, acceptable range is 1 - 4\n", r_val);
292 int xen_pt_msi_set_enable(XenPCIPassthroughState *s, bool en);
293 int xen_pt_msi_setup(XenPCIPassthroughState *s);
294 int xen_pt_msi_update(XenPCIPassthroughState *d);
295 void xen_pt_msi_disable(XenPCIPassthroughState *s);
297 int xen_pt_msix_init(XenPCIPassthroughState *s, uint32_t base);
298 void xen_pt_msix_delete(XenPCIPassthroughState *s);
299 int xen_pt_msix_update(XenPCIPassthroughState *s);
300 int xen_pt_msix_update_remap(XenPCIPassthroughState *s, int bar_index);
301 void xen_pt_msix_disable(XenPCIPassthroughState *s);
303 static inline bool xen_pt_has_msix_mapping(XenPCIPassthroughState *s, int bar)
305 return s->msix && s->msix->bar_index == bar;
308 extern void *pci_assign_dev_load_option_rom(PCIDevice *dev,
309 struct Object *owner, int *size,
311 unsigned int bus, unsigned int slot,
312 unsigned int function);
313 extern bool has_igd_gfx_passthru;
314 static inline bool is_igd_vga_passthrough(XenHostPCIDevice *dev)
316 return (has_igd_gfx_passthru
317 && ((dev->class_code >> 0x8) == PCI_CLASS_DISPLAY_VGA));
319 int xen_pt_register_vga_regions(XenHostPCIDevice *dev);
320 int xen_pt_unregister_vga_regions(XenHostPCIDevice *dev);
321 int xen_pt_setup_vga(XenPCIPassthroughState *s, XenHostPCIDevice *dev);
322 #endif /* !XEN_PT_H */