a2cb15b0dd
update all users so we can remove the makefile hack. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
303 lines
8.8 KiB
C
303 lines
8.8 KiB
C
#ifndef XEN_PT_H
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#define XEN_PT_H
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#include "qemu-common.h"
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#include "xen_common.h"
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#include "pci/pci.h"
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#include "xen-host-pci-device.h"
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void xen_pt_log(const PCIDevice *d, const char *f, ...) GCC_FMT_ATTR(2, 3);
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#define XEN_PT_ERR(d, _f, _a...) xen_pt_log(d, "%s: Error: "_f, __func__, ##_a)
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#ifdef XEN_PT_LOGGING_ENABLED
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# define XEN_PT_LOG(d, _f, _a...) xen_pt_log(d, "%s: " _f, __func__, ##_a)
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# define XEN_PT_WARN(d, _f, _a...) \
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xen_pt_log(d, "%s: Warning: "_f, __func__, ##_a)
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#else
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# define XEN_PT_LOG(d, _f, _a...)
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# define XEN_PT_WARN(d, _f, _a...)
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#endif
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#ifdef XEN_PT_DEBUG_PCI_CONFIG_ACCESS
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# define XEN_PT_LOG_CONFIG(d, addr, val, len) \
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xen_pt_log(d, "%s: address=0x%04x val=0x%08x len=%d\n", \
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__func__, addr, val, len)
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#else
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# define XEN_PT_LOG_CONFIG(d, addr, val, len)
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#endif
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/* Helper */
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#define XEN_PFN(x) ((x) >> XC_PAGE_SHIFT)
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typedef struct XenPTRegInfo XenPTRegInfo;
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typedef struct XenPTReg XenPTReg;
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typedef struct XenPCIPassthroughState XenPCIPassthroughState;
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/* function type for config reg */
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typedef int (*xen_pt_conf_reg_init)
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(XenPCIPassthroughState *, XenPTRegInfo *, uint32_t real_offset,
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uint32_t *data);
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typedef int (*xen_pt_conf_dword_write)
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(XenPCIPassthroughState *, XenPTReg *cfg_entry,
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uint32_t *val, uint32_t dev_value, uint32_t valid_mask);
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typedef int (*xen_pt_conf_word_write)
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(XenPCIPassthroughState *, XenPTReg *cfg_entry,
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uint16_t *val, uint16_t dev_value, uint16_t valid_mask);
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typedef int (*xen_pt_conf_byte_write)
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(XenPCIPassthroughState *, XenPTReg *cfg_entry,
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uint8_t *val, uint8_t dev_value, uint8_t valid_mask);
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typedef int (*xen_pt_conf_dword_read)
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(XenPCIPassthroughState *, XenPTReg *cfg_entry,
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uint32_t *val, uint32_t valid_mask);
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typedef int (*xen_pt_conf_word_read)
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(XenPCIPassthroughState *, XenPTReg *cfg_entry,
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uint16_t *val, uint16_t valid_mask);
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typedef int (*xen_pt_conf_byte_read)
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(XenPCIPassthroughState *, XenPTReg *cfg_entry,
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uint8_t *val, uint8_t valid_mask);
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#define XEN_PT_BAR_ALLF 0xFFFFFFFF
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#define XEN_PT_BAR_UNMAPPED (-1)
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#define PCI_CAP_MAX 48
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typedef enum {
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XEN_PT_GRP_TYPE_HARDWIRED = 0, /* 0 Hardwired reg group */
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XEN_PT_GRP_TYPE_EMU, /* emul reg group */
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} XenPTRegisterGroupType;
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typedef enum {
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XEN_PT_BAR_FLAG_MEM = 0, /* Memory type BAR */
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XEN_PT_BAR_FLAG_IO, /* I/O type BAR */
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XEN_PT_BAR_FLAG_UPPER, /* upper 64bit BAR */
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XEN_PT_BAR_FLAG_UNUSED, /* unused BAR */
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} XenPTBarFlag;
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typedef struct XenPTRegion {
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/* BAR flag */
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XenPTBarFlag bar_flag;
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/* Translation of the emulated address */
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union {
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uint64_t maddr;
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uint64_t pio_base;
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uint64_t u;
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} access;
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} XenPTRegion;
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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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/* emulated register information */
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struct XenPTRegInfo {
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uint32_t offset;
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uint32_t size;
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uint32_t init_val;
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/* reg read only field mask (ON:RO/ROS, OFF:other) */
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uint32_t ro_mask;
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/* reg emulate field mask (ON:emu, OFF:passthrough) */
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uint32_t emu_mask;
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/* no write back allowed */
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uint32_t no_wb;
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xen_pt_conf_reg_init init;
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/* read/write function pointer
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* for double_word/word/byte size */
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union {
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struct {
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xen_pt_conf_dword_write write;
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xen_pt_conf_dword_read read;
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} dw;
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struct {
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xen_pt_conf_word_write write;
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xen_pt_conf_word_read read;
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} w;
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struct {
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xen_pt_conf_byte_write write;
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xen_pt_conf_byte_read read;
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} b;
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} u;
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};
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/* emulated register management */
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struct XenPTReg {
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QLIST_ENTRY(XenPTReg) entries;
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XenPTRegInfo *reg;
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uint32_t data; /* emulated value */
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};
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typedef struct XenPTRegGroupInfo XenPTRegGroupInfo;
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/* emul reg group size initialize method */
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typedef int (*xen_pt_reg_size_init_fn)
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(XenPCIPassthroughState *, const XenPTRegGroupInfo *,
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uint32_t base_offset, uint8_t *size);
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/* emulated register group information */
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struct XenPTRegGroupInfo {
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uint8_t grp_id;
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XenPTRegisterGroupType grp_type;
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uint8_t grp_size;
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xen_pt_reg_size_init_fn size_init;
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XenPTRegInfo *emu_regs;
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};
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/* emul register group management table */
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typedef struct XenPTRegGroup {
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QLIST_ENTRY(XenPTRegGroup) entries;
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const XenPTRegGroupInfo *reg_grp;
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uint32_t base_offset;
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uint8_t size;
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QLIST_HEAD(, XenPTReg) reg_tbl_list;
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} XenPTRegGroup;
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#define XEN_PT_UNASSIGNED_PIRQ (-1)
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typedef struct XenPTMSI {
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uint16_t flags;
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uint32_t addr_lo; /* guest message address */
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uint32_t addr_hi; /* guest message upper address */
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uint16_t data; /* guest message data */
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uint32_t ctrl_offset; /* saved control offset */
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int pirq; /* guest pirq corresponding */
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bool initialized; /* when guest MSI is initialized */
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bool mapped; /* when pirq is mapped */
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} XenPTMSI;
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typedef struct XenPTMSIXEntry {
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int pirq;
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uint64_t addr;
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uint32_t data;
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uint32_t vector_ctrl;
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bool updated; /* indicate whether MSI ADDR or DATA is updated */
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} XenPTMSIXEntry;
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typedef struct XenPTMSIX {
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uint32_t ctrl_offset;
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bool enabled;
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int total_entries;
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int bar_index;
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uint64_t table_base;
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uint32_t table_offset_adjust; /* page align mmap */
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uint64_t mmio_base_addr;
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MemoryRegion mmio;
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void *phys_iomem_base;
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XenPTMSIXEntry msix_entry[0];
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} XenPTMSIX;
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struct XenPCIPassthroughState {
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PCIDevice dev;
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PCIHostDeviceAddress hostaddr;
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bool is_virtfn;
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XenHostPCIDevice real_device;
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XenPTRegion bases[PCI_NUM_REGIONS]; /* Access regions */
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QLIST_HEAD(, XenPTRegGroup) reg_grps;
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uint32_t machine_irq;
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XenPTMSI *msi;
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XenPTMSIX *msix;
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MemoryRegion bar[PCI_NUM_REGIONS - 1];
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MemoryRegion rom;
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MemoryListener memory_listener;
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MemoryListener io_listener;
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};
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int xen_pt_config_init(XenPCIPassthroughState *s);
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void xen_pt_config_delete(XenPCIPassthroughState *s);
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XenPTRegGroup *xen_pt_find_reg_grp(XenPCIPassthroughState *s, uint32_t address);
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XenPTReg *xen_pt_find_reg(XenPTRegGroup *reg_grp, uint32_t address);
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int xen_pt_bar_offset_to_index(uint32_t offset);
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static inline pcibus_t xen_pt_get_emul_size(XenPTBarFlag flag, pcibus_t r_size)
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{
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/* align resource size (memory type only) */
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if (flag == XEN_PT_BAR_FLAG_MEM) {
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return (r_size + XC_PAGE_SIZE - 1) & XC_PAGE_MASK;
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} else {
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return r_size;
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}
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}
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/* INTx */
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/* The PCI Local Bus Specification, Rev. 3.0,
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* Section 6.2.4 Miscellaneous Registers, pp 223
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* outlines 5 valid values for the interrupt pin (intx).
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* 0: For devices (or device functions) that don't use an interrupt in
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* 1: INTA#
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* 2: INTB#
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* 3: INTC#
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* 4: INTD#
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*
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* Xen uses the following 4 values for intx
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* 0: INTA#
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* 1: INTB#
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* 2: INTC#
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* 3: INTD#
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*
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* Observing that these list of values are not the same, xen_pt_pci_read_intx()
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* uses the following mapping from hw to xen values.
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* This seems to reflect the current usage within Xen.
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*
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* PCI hardware | Xen | Notes
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* ----------------+-----+----------------------------------------------------
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* 0 | 0 | No interrupt
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* 1 | 0 | INTA#
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* 2 | 1 | INTB#
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* 3 | 2 | INTC#
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* 4 | 3 | INTD#
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* any other value | 0 | This should never happen, log error message
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*/
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static inline uint8_t xen_pt_pci_read_intx(XenPCIPassthroughState *s)
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{
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uint8_t v = 0;
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xen_host_pci_get_byte(&s->real_device, PCI_INTERRUPT_PIN, &v);
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return v;
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}
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static inline uint8_t xen_pt_pci_intx(XenPCIPassthroughState *s)
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{
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uint8_t r_val = xen_pt_pci_read_intx(s);
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XEN_PT_LOG(&s->dev, "intx=%i\n", r_val);
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if (r_val < 1 || r_val > 4) {
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XEN_PT_LOG(&s->dev, "Interrupt pin read from hardware is out of range:"
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" value=%i, acceptable range is 1 - 4\n", r_val);
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r_val = 0;
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} else {
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r_val -= 1;
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}
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return r_val;
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}
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/* MSI/MSI-X */
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int xen_pt_msi_set_enable(XenPCIPassthroughState *s, bool en);
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int xen_pt_msi_setup(XenPCIPassthroughState *s);
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int xen_pt_msi_update(XenPCIPassthroughState *d);
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void xen_pt_msi_disable(XenPCIPassthroughState *s);
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int xen_pt_msix_init(XenPCIPassthroughState *s, uint32_t base);
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void xen_pt_msix_delete(XenPCIPassthroughState *s);
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int xen_pt_msix_update(XenPCIPassthroughState *s);
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int xen_pt_msix_update_remap(XenPCIPassthroughState *s, int bar_index);
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void xen_pt_msix_disable(XenPCIPassthroughState *s);
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static inline bool xen_pt_has_msix_mapping(XenPCIPassthroughState *s, int bar)
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{
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return s->msix && s->msix->bar_index == bar;
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}
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#endif /* !XEN_PT_H */
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