diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/Kbuild | 5 | ||||
| -rw-r--r-- | include/linux/apm_bios.h | 30 | ||||
| -rw-r--r-- | include/linux/edd.h | 137 | ||||
| -rw-r--r-- | include/linux/lguest.h | 80 | ||||
| -rw-r--r-- | include/linux/lguest_bus.h | 51 | ||||
| -rw-r--r-- | include/linux/lguest_launcher.h | 112 | ||||
| -rw-r--r-- | include/linux/mod_devicetable.h | 6 | ||||
| -rw-r--r-- | include/linux/screen_info.h | 81 | ||||
| -rw-r--r-- | include/linux/virtio.h | 110 | ||||
| -rw-r--r-- | include/linux/virtio_blk.h | 51 | ||||
| -rw-r--r-- | include/linux/virtio_config.h | 111 | ||||
| -rw-r--r-- | include/linux/virtio_console.h | 12 | ||||
| -rw-r--r-- | include/linux/virtio_net.h | 36 | ||||
| -rw-r--r-- | include/linux/virtio_ring.h | 119 |
14 files changed, 614 insertions, 327 deletions
diff --git a/include/linux/Kbuild b/include/linux/Kbuild index e3ffd14a3f0..6a65231bc78 100644 --- a/include/linux/Kbuild +++ b/include/linux/Kbuild @@ -186,6 +186,7 @@ unifdef-y += cyclades.h unifdef-y += dccp.h unifdef-y += dirent.h unifdef-y += dlm.h +unifdef-y += edd.h unifdef-y += elfcore.h unifdef-y += errno.h unifdef-y += errqueue.h @@ -306,6 +307,7 @@ unifdef-y += rtc.h unifdef-y += rtnetlink.h unifdef-y += scc.h unifdef-y += sched.h +unifdef-y += screen_info.h unifdef-y += sdla.h unifdef-y += selinux_netlink.h unifdef-y += sem.h @@ -341,6 +343,9 @@ unifdef-y += user.h unifdef-y += utsname.h unifdef-y += videodev2.h unifdef-y += videodev.h +unifdef-y += virtio_config.h +unifdef-y += virtio_blk.h +unifdef-y += virtio_net.h unifdef-y += wait.h unifdef-y += wanrouter.h unifdef-y += watchdog.h diff --git a/include/linux/apm_bios.h b/include/linux/apm_bios.h index 5f921c84827..9754baa1492 100644 --- a/include/linux/apm_bios.h +++ b/include/linux/apm_bios.h @@ -16,29 +16,29 @@ * General Public License for more details. */ -typedef unsigned short apm_event_t; -typedef unsigned short apm_eventinfo_t; +#include <linux/types.h> + +struct apm_bios_info { + __u16 version; + __u16 cseg; + __u32 offset; + __u16 cseg_16; + __u16 dseg; + __u16 flags; + __u16 cseg_len; + __u16 cseg_16_len; + __u16 dseg_len; +}; #ifdef __KERNEL__ -#include <linux/types.h> +typedef unsigned short apm_event_t; +typedef unsigned short apm_eventinfo_t; #define APM_CS (GDT_ENTRY_APMBIOS_BASE * 8) #define APM_CS_16 (APM_CS + 8) #define APM_DS (APM_CS_16 + 8) -struct apm_bios_info { - u16 version; - u16 cseg; - u32 offset; - u16 cseg_16; - u16 dseg; - u16 flags; - u16 cseg_len; - u16 cseg_16_len; - u16 dseg_len; -}; - /* Results of APM Installation Check */ #define APM_16_BIT_SUPPORT 0x0001 #define APM_32_BIT_SUPPORT 0x0002 diff --git a/include/linux/edd.h b/include/linux/edd.h index 7b647822d6d..5d747c5cd0f 100644 --- a/include/linux/edd.h +++ b/include/linux/edd.h @@ -67,113 +67,113 @@ #define EDD_INFO_USE_INT13_FN50 (1 << 7) struct edd_device_params { - u16 length; - u16 info_flags; - u32 num_default_cylinders; - u32 num_default_heads; - u32 sectors_per_track; - u64 number_of_sectors; - u16 bytes_per_sector; - u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */ - u16 key; /* = 0xBEDD */ - u8 device_path_info_length; /* = 44 */ - u8 reserved2; - u16 reserved3; - u8 host_bus_type[4]; - u8 interface_type[8]; + __u16 length; + __u16 info_flags; + __u32 num_default_cylinders; + __u32 num_default_heads; + __u32 sectors_per_track; + __u64 number_of_sectors; + __u16 bytes_per_sector; + __u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */ + __u16 key; /* = 0xBEDD */ + __u8 device_path_info_length; /* = 44 */ + __u8 reserved2; + __u16 reserved3; + __u8 host_bus_type[4]; + __u8 interface_type[8]; union { struct { - u16 base_address; - u16 reserved1; - u32 reserved2; + __u16 base_address; + __u16 reserved1; + __u32 reserved2; } __attribute__ ((packed)) isa; struct { - u8 bus; - u8 slot; - u8 function; - u8 channel; - u32 reserved; + __u8 bus; + __u8 slot; + __u8 function; + __u8 channel; + __u32 reserved; } __attribute__ ((packed)) pci; /* pcix is same as pci */ struct { - u64 reserved; + __u64 reserved; } __attribute__ ((packed)) ibnd; struct { - u64 reserved; + __u64 reserved; } __attribute__ ((packed)) xprs; struct { - u64 reserved; + __u64 reserved; } __attribute__ ((packed)) htpt; struct { - u64 reserved; + __u64 reserved; } __attribute__ ((packed)) unknown; } interface_path; union { struct { - u8 device; - u8 reserved1; - u16 reserved2; - u32 reserved3; - u64 reserved4; + __u8 device; + __u8 reserved1; + __u16 reserved2; + __u32 reserved3; + __u64 reserved4; } __attribute__ ((packed)) ata; struct { - u8 device; - u8 lun; - u8 reserved1; - u8 reserved2; - u32 reserved3; - u64 reserved4; + __u8 device; + __u8 lun; + __u8 reserved1; + __u8 reserved2; + __u32 reserved3; + __u64 reserved4; } __attribute__ ((packed)) atapi; struct { - u16 id; - u64 lun; - u16 reserved1; - u32 reserved2; + __u16 id; + __u64 lun; + __u16 reserved1; + __u32 reserved2; } __attribute__ ((packed)) scsi; struct { - u64 serial_number; - u64 reserved; + __u64 serial_number; + __u64 reserved; } __attribute__ ((packed)) usb; struct { - u64 eui; - u64 reserved; + __u64 eui; + __u64 reserved; } __attribute__ ((packed)) i1394; struct { - u64 wwid; - u64 lun; + __u64 wwid; + __u64 lun; } __attribute__ ((packed)) fibre; struct { - u64 identity_tag; - u64 reserved; + __u64 identity_tag; + __u64 reserved; } __attribute__ ((packed)) i2o; struct { - u32 array_number; - u32 reserved1; - u64 reserved2; + __u32 array_number; + __u32 reserved1; + __u64 reserved2; } __attribute__ ((packed)) raid; struct { - u8 device; - u8 reserved1; - u16 reserved2; - u32 reserved3; - u64 reserved4; + __u8 device; + __u8 reserved1; + __u16 reserved2; + __u32 reserved3; + __u64 reserved4; } __attribute__ ((packed)) sata; struct { - u64 reserved1; - u64 reserved2; + __u64 reserved1; + __u64 reserved2; } __attribute__ ((packed)) unknown; } device_path; - u8 reserved4; - u8 checksum; + __u8 reserved4; + __u8 checksum; } __attribute__ ((packed)); struct edd_info { - u8 device; - u8 version; - u16 interface_support; - u16 legacy_max_cylinder; - u8 legacy_max_head; - u8 legacy_sectors_per_track; + __u8 device; + __u8 version; + __u16 interface_support; + __u16 legacy_max_cylinder; + __u8 legacy_max_head; + __u8 legacy_sectors_per_track; struct edd_device_params params; } __attribute__ ((packed)); @@ -184,8 +184,9 @@ struct edd { unsigned char edd_info_nr; }; +#ifdef __KERNEL__ extern struct edd edd; - +#endif /* __KERNEL__ */ #endif /*!__ASSEMBLY__ */ #endif /* _LINUX_EDD_H */ diff --git a/include/linux/lguest.h b/include/linux/lguest.h index 157ad64aa7c..8beb2913462 100644 --- a/include/linux/lguest.h +++ b/include/linux/lguest.h @@ -1,76 +1,16 @@ /* Things the lguest guest needs to know. Note: like all lguest interfaces, * this is subject to wild and random change between versions. */ -#ifndef _ASM_LGUEST_H -#define _ASM_LGUEST_H +#ifndef _LINUX_LGUEST_H +#define _LINUX_LGUEST_H #ifndef __ASSEMBLY__ +#include <linux/time.h> #include <asm/irq.h> - -#define LHCALL_FLUSH_ASYNC 0 -#define LHCALL_LGUEST_INIT 1 -#define LHCALL_CRASH 2 -#define LHCALL_LOAD_GDT 3 -#define LHCALL_NEW_PGTABLE 4 -#define LHCALL_FLUSH_TLB 5 -#define LHCALL_LOAD_IDT_ENTRY 6 -#define LHCALL_SET_STACK 7 -#define LHCALL_TS 8 -#define LHCALL_SET_CLOCKEVENT 9 -#define LHCALL_HALT 10 -#define LHCALL_BIND_DMA 12 -#define LHCALL_SEND_DMA 13 -#define LHCALL_SET_PTE 14 -#define LHCALL_SET_PMD 15 -#define LHCALL_LOAD_TLS 16 +#include <asm/lguest_hcall.h> #define LG_CLOCK_MIN_DELTA 100UL #define LG_CLOCK_MAX_DELTA ULONG_MAX -/*G:031 First, how does our Guest contact the Host to ask for privileged - * operations? There are two ways: the direct way is to make a "hypercall", - * to make requests of the Host Itself. - * - * Our hypercall mechanism uses the highest unused trap code (traps 32 and - * above are used by real hardware interrupts). Seventeen hypercalls are - * available: the hypercall number is put in the %eax register, and the - * arguments (when required) are placed in %edx, %ebx and %ecx. If a return - * value makes sense, it's returned in %eax. - * - * Grossly invalid calls result in Sudden Death at the hands of the vengeful - * Host, rather than returning failure. This reflects Winston Churchill's - * definition of a gentleman: "someone who is only rude intentionally". */ -#define LGUEST_TRAP_ENTRY 0x1F - -static inline unsigned long -hcall(unsigned long call, - unsigned long arg1, unsigned long arg2, unsigned long arg3) -{ - /* "int" is the Intel instruction to trigger a trap. */ - asm volatile("int $" __stringify(LGUEST_TRAP_ENTRY) - /* The call is in %eax (aka "a"), and can be replaced */ - : "=a"(call) - /* The other arguments are in %eax, %edx, %ebx & %ecx */ - : "a"(call), "d"(arg1), "b"(arg2), "c"(arg3) - /* "memory" means this might write somewhere in memory. - * This isn't true for all calls, but it's safe to tell - * gcc that it might happen so it doesn't get clever. */ - : "memory"); - return call; -} -/*:*/ - -void async_hcall(unsigned long call, - unsigned long arg1, unsigned long arg2, unsigned long arg3); - -/* Can't use our min() macro here: needs to be a constant */ -#define LGUEST_IRQS (NR_IRQS < 32 ? NR_IRQS: 32) - -#define LHCALL_RING_SIZE 64 -struct hcall_ring -{ - u32 eax, edx, ebx, ecx; -}; - /*G:032 The second method of communicating with the Host is to via "struct * lguest_data". The Guest's very first hypercall is to tell the Host where * this is, and then the Guest and Host both publish information in it. :*/ @@ -97,20 +37,24 @@ struct lguest_data /* 0xFF == done (set by Host), 0 == pending (set by Guest). */ u8 hcall_status[LHCALL_RING_SIZE]; /* The actual registers for the hypercalls. */ - struct hcall_ring hcalls[LHCALL_RING_SIZE]; + struct hcall_args hcalls[LHCALL_RING_SIZE]; /* Fields initialized by the Host at boot: */ /* Memory not to try to access */ unsigned long reserve_mem; - /* ID of this Guest (used by network driver to set ethernet address) */ - u16 guestid; /* KHz for the TSC clock. */ u32 tsc_khz; + /* Page where the top-level pagetable is */ + unsigned long pgdir; /* Fields initialized by the Guest at boot: */ /* Instruction range to suppress interrupts even if enabled */ unsigned long noirq_start, noirq_end; + /* Address above which page tables are all identical. */ + unsigned long kernel_address; + /* The vector to try to use for system calls (0x40 or 0x80). */ + unsigned int syscall_vec; }; extern struct lguest_data lguest_data; #endif /* __ASSEMBLY__ */ -#endif /* _ASM_LGUEST_H */ +#endif /* _LINUX_LGUEST_H */ diff --git a/include/linux/lguest_bus.h b/include/linux/lguest_bus.h deleted file mode 100644 index d27853ddc64..00000000000 --- a/include/linux/lguest_bus.h +++ /dev/null @@ -1,51 +0,0 @@ -#ifndef _ASM_LGUEST_DEVICE_H -#define _ASM_LGUEST_DEVICE_H -/* Everything you need to know about lguest devices. */ -#include <linux/device.h> -#include <linux/lguest.h> -#include <linux/lguest_launcher.h> - -struct lguest_device { - /* Unique busid, and index into lguest_page->devices[] */ - unsigned int index; - - struct device dev; - - /* Driver can hang data off here. */ - void *private; -}; - -/*D:380 Since interrupt numbers are arbitrary, we use a convention: each device - * can use the interrupt number corresponding to its index. The +1 is because - * interrupt 0 is not usable (it's actually the timer interrupt). */ -static inline int lgdev_irq(const struct lguest_device *dev) -{ - return dev->index + 1; -} -/*:*/ - -/* dma args must not be vmalloced! */ -void lguest_send_dma(unsigned long key, struct lguest_dma *dma); -int lguest_bind_dma(unsigned long key, struct lguest_dma *dmas, - unsigned int num, u8 irq); -void lguest_unbind_dma(unsigned long key, struct lguest_dma *dmas); - -/* Map the virtual device space */ -void *lguest_map(unsigned long phys_addr, unsigned long pages); -void lguest_unmap(void *); - -struct lguest_driver { - const char *name; - struct module *owner; - u16 device_type; - int (*probe)(struct lguest_device *dev); - void (*remove)(struct lguest_device *dev); - - struct device_driver drv; -}; - -extern int register_lguest_driver(struct lguest_driver *drv); -extern void unregister_lguest_driver(struct lguest_driver *drv); - -extern struct lguest_device_desc *lguest_devices; /* Just past max_pfn */ -#endif /* _ASM_LGUEST_DEVICE_H */ diff --git a/include/linux/lguest_launcher.h b/include/linux/lguest_launcher.h index 64167057944..61e1e3e6b1c 100644 --- a/include/linux/lguest_launcher.h +++ b/include/linux/lguest_launcher.h @@ -1,6 +1,7 @@ #ifndef _ASM_LGUEST_USER #define _ASM_LGUEST_USER /* Everything the "lguest" userspace program needs to know. */ +#include <linux/types.h> /* They can register up to 32 arrays of lguest_dma. */ #define LGUEST_MAX_DMA 32 /* At most we can dma 16 lguest_dma in one op. */ @@ -9,66 +10,6 @@ /* How many devices? Assume each one wants up to two dma arrays per device. */ #define LGUEST_MAX_DEVICES (LGUEST_MAX_DMA/2) -/*D:200 - * Lguest I/O - * - * The lguest I/O mechanism is the only way Guests can talk to devices. There - * are two hypercalls involved: SEND_DMA for output and BIND_DMA for input. In - * each case, "struct lguest_dma" describes the buffer: this contains 16 - * addr/len pairs, and if there are fewer buffer elements the len array is - * terminated with a 0. - * - * I/O is organized by keys: BIND_DMA attaches buffers to a particular key, and - * SEND_DMA transfers to buffers bound to particular key. By convention, keys - * correspond to a physical address within the device's page. This means that - * devices will never accidentally end up with the same keys, and allows the - * Host use The Futex Trick (as we'll see later in our journey). - * - * SEND_DMA simply indicates a key to send to, and the physical address of the - * "struct lguest_dma" to send. The Host will write the number of bytes - * transferred into the "struct lguest_dma"'s used_len member. - * - * BIND_DMA indicates a key to bind to, a pointer to an array of "struct - * lguest_dma"s ready for receiving, the size of that array, and an interrupt - * to trigger when data is received. The Host will only allow transfers into - * buffers with a used_len of zero: it then sets used_len to the number of - * bytes transferred and triggers the interrupt for the Guest to process the - * new input. */ -struct lguest_dma -{ - /* 0 if free to be used, filled by the Host. */ - u32 used_len; - unsigned long addr[LGUEST_MAX_DMA_SECTIONS]; - u16 len[LGUEST_MAX_DMA_SECTIONS]; -}; -/*:*/ - -/*D:460 This is the layout of a block device memory page. The Launcher sets up - * the num_sectors initially to tell the Guest the size of the disk. The Guest - * puts the type, sector and length of the request in the first three fields, - * then DMAs to the Host. The Host processes the request, sets up the result, - * then DMAs back to the Guest. */ -struct lguest_block_page -{ - /* 0 is a read, 1 is a write. */ - int type; - u32 sector; /* Offset in device = sector * 512. */ - u32 bytes; /* Length expected to be read/written in bytes */ - /* 0 = pending, 1 = done, 2 = done, error */ - int result; - u32 num_sectors; /* Disk length = num_sectors * 512 */ -}; - -/*D:520 The network device is basically a memory page where all the Guests on - * the network publish their MAC (ethernet) addresses: it's an array of "struct - * lguest_net": */ -struct lguest_net -{ - /* Simply the mac address (with multicast bit meaning promisc). */ - unsigned char mac[6]; -}; -/*:*/ - /* Where the Host expects the Guest to SEND_DMA console output to. */ #define LGUEST_CONSOLE_DMA_KEY 0 @@ -81,38 +22,29 @@ struct lguest_net * complex burden for the Host and suboptimal for the Guest, so we have our own * "lguest" bus and simple drivers. * - * Devices are described by an array of LGUEST_MAX_DEVICES of these structs, - * placed by the Launcher just above the top of physical memory: + * Devices are described by a simplified ID, a status byte, and some "config" + * bytes which describe this device's configuration. This is placed by the + * Launcher just above the top of physical memory: */ struct lguest_device_desc { - /* The device type: console, network, disk etc. */ - u16 type; -#define LGUEST_DEVICE_T_CONSOLE 1 -#define LGUEST_DEVICE_T_NET 2 -#define LGUEST_DEVICE_T_BLOCK 3 - - /* The specific features of this device: these depends on device type - * except for LGUEST_DEVICE_F_RANDOMNESS. */ - u16 features; -#define LGUEST_NET_F_NOCSUM 0x4000 /* Don't bother checksumming */ -#define LGUEST_DEVICE_F_RANDOMNESS 0x8000 /* IRQ is fairly random */ - - /* This is how the Guest reports status of the device: the Host can set - * LGUEST_DEVICE_S_REMOVED to indicate removal, but the rest are only - * ever manipulated by the Guest, and only ever set. */ - u16 status; -/* 256 and above are device specific. */ -#define LGUEST_DEVICE_S_ACKNOWLEDGE 1 /* We have seen device. */ -#define LGUEST_DEVICE_S_DRIVER 2 /* We have found a driver */ -#define LGUEST_DEVICE_S_DRIVER_OK 4 /* Driver says OK! */ -#define LGUEST_DEVICE_S_REMOVED 8 /* Device has gone away. */ -#define LGUEST_DEVICE_S_REMOVED_ACK 16 /* Driver has been told. */ -#define LGUEST_DEVICE_S_FAILED 128 /* Something actually failed */ + /* The device type: console, network, disk etc. Type 0 terminates. */ + __u8 type; + /* The number of bytes of the config array. */ + __u8 config_len; + /* A status byte, written by the Guest. */ + __u8 status; + __u8 config[0]; +}; - /* Each device exists somewhere in Guest physical memory, over some - * number of pages. */ - u16 num_pages; - u32 pfn; +/*D:135 This is how we expect the device configuration field for a virtqueue + * (type VIRTIO_CONFIG_F_VIRTQUEUE) to be laid out: */ +struct lguest_vqconfig { + /* The number of entries in the virtio_ring */ + __u16 num; + /* The interrupt we get when something happens. */ + __u16 irq; + /* The page number of the virtio ring for this device. */ + __u32 pfn; }; /*:*/ @@ -120,7 +52,7 @@ struct lguest_device_desc { enum lguest_req { LHREQ_INITIALIZE, /* + pfnlimit, pgdir, start, pageoffset */ - LHREQ_GETDMA, /* + addr (returns &lguest_dma, irq in ->used_len) */ + LHREQ_GETDMA, /* No longer used */ LHREQ_IRQ, /* + irq */ LHREQ_BREAK, /* + on/off flag (on blocks until someone does off) */ }; diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h index 522b0dd836c..e9fddb42f26 100644 --- a/include/linux/mod_devicetable.h +++ b/include/linux/mod_devicetable.h @@ -361,4 +361,10 @@ struct ssb_device_id { #define SSB_ANY_ID 0xFFFF #define SSB_ANY_REV 0xFF +struct virtio_device_id { + __u32 device; + __u32 vendor; +}; +#define VIRTIO_DEV_ANY_ID 0xffffffff + #endif /* LINUX_MOD_DEVICETABLE_H */ diff --git a/include/linux/screen_info.h b/include/linux/screen_info.h index ba81ffe9958..827b85bbf38 100644 --- a/include/linux/screen_info.h +++ b/include/linux/screen_info.h @@ -8,45 +8,43 @@ */ struct screen_info { - u8 orig_x; /* 0x00 */ - u8 orig_y; /* 0x01 */ - u16 ext_mem_k; /* 0x02 */ - u16 orig_video_page; /* 0x04 */ - u8 orig_video_mode; /* 0x06 */ - u8 orig_video_cols; /* 0x07 */ - u16 unused2; /* 0x08 */ - u16 orig_video_ega_bx; /* 0x0a */ - u16 unused3; /* 0x0c */ - u8 orig_video_lines; /* 0x0e */ - u8 orig_video_isVGA; /* 0x0f */ - u16 orig_video_points; /* 0x10 */ + __u8 orig_x; /* 0x00 */ + __u8 orig_y; /* 0x01 */ + __u16 ext_mem_k; /* 0x02 */ + __u16 orig_video_page; /* 0x04 */ + __u8 orig_video_mode; /* 0x06 */ + __u8 orig_video_cols; /* 0x07 */ + __u16 unused2; /* 0x08 */ + __u16 orig_video_ega_bx;/* 0x0a */ + __u16 unused3; /* 0x0c */ + __u8 orig_video_lines; /* 0x0e */ + __u8 orig_video_isVGA; /* 0x0f */ + __u16 orig_video_points;/* 0x10 */ /* VESA graphic mode -- linear frame buffer */ - u16 lfb_width; /* 0x12 */ - u16 lfb_height; /* 0x14 */ - u16 lfb_depth; /* 0x16 */ - u32 lfb_base; /* 0x18 */ - u32 lfb_size; /* 0x1c */ - u16 cl_magic, cl_offset; /* 0x20 */ - u16 lfb_linelength; /* 0x24 */ - u8 red_size; /* 0x26 */ - u8 red_pos; /* 0x27 */ - u8 green_size; /* 0x28 */ - u8 green_pos; /* 0x29 */ - u8 blue_size; /* 0x2a */ - u8 blue_pos; /* 0x2b */ - u8 rsvd_size; /* 0x2c */ - u8 rsvd_pos; /* 0x2d */ - u16 vesapm_seg; /* 0x2e */ - u16 vesapm_off; /* 0x30 */ - u16 pages; /* 0x32 */ - u16 vesa_attributes; /* 0x34 */ - u32 capabilities; /* 0x36 */ - u8 _reserved[6]; /* 0x3a */ + __u16 lfb_width; /* 0x12 */ + __u16 lfb_height; /* 0x14 */ + __u16 lfb_depth; /* 0x16 */ + __u32 lfb_base; /* 0x18 */ + __u32 lfb_size; /* 0x1c */ + __u16 cl_magic, cl_offset; /* 0x20 */ + __u16 lfb_linelength; /* 0x24 */ + __u8 red_size; /* 0x26 */ + __u8 red_pos; /* 0x27 */ + __u8 green_size; /* 0x28 */ + __u8 green_pos; /* 0x29 */ + __u8 blue_size; /* 0x2a */ + __u8 blue_pos; /* 0x2b */ + __u8 rsvd_size; /* 0x2c */ + __u8 rsvd_pos; /* 0x2d */ + __u16 vesapm_seg; /* 0x2e */ + __u16 vesapm_off; /* 0x30 */ + __u16 pages; /* 0x32 */ + __u16 vesa_attributes; /* 0x34 */ + __u32 capabilities; /* 0x36 */ + __u8 _reserved[6]; /* 0x3a */ } __attribute__((packed)); -extern struct screen_info screen_info; - #define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */ #define VIDEO_TYPE_CGA 0x11 /* CGA Display */ #define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */ @@ -65,4 +63,17 @@ extern struct screen_info screen_info; #define VIDEO_TYPE_PMAC 0x60 /* PowerMacintosh frame buffer. */ +#ifdef __KERNEL__ +extern struct screen_info screen_info; + +#define ORIG_X (screen_info.orig_x) +#define ORIG_Y (screen_info.orig_y) +#define ORIG_VIDEO_MODE (screen_info.orig_video_mode) +#define ORIG_VIDEO_COLS (screen_info.orig_video_cols) +#define ORIG_VIDEO_EGA_BX (screen_info.orig_video_ega_bx) +#define ORIG_VIDEO_LINES (screen_info.orig_video_lines) +#define ORIG_VIDEO_ISVGA (screen_info.orig_video_isVGA) +#define ORIG_VIDEO_POINTS (screen_info.orig_video_points) +#endif /* __KERNEL__ */ + #endif /* _SCREEN_INFO_H */ diff --git a/include/linux/virtio.h b/include/linux/virtio.h new file mode 100644 index 00000000000..14e1379876d --- /dev/null +++ b/include/linux/virtio.h @@ -0,0 +1,110 @@ +#ifndef _LINUX_VIRTIO_H +#define _LINUX_VIRTIO_H +/* Everything a virtio driver needs to work with any particular virtio + * implementation. */ +#include <linux/types.h> +#include <linux/scatterlist.h> +#include <linux/spinlock.h> +#include <linux/device.h> +#include <linux/mod_devicetable.h> + +/** + * virtqueue - a queue to register buffers for sending or receiving. + * @callback: the function to call when buffers are consumed (can be NULL). + * If this returns false, callbacks are suppressed until vq_ops->restart + * is called. + * @vdev: the virtio device this queue was created for. + * @vq_ops: the operations for this virtqueue (see below). + * @priv: a pointer for the virtqueue implementation to use. + */ +struct virtqueue +{ + bool (*callback)(struct virtqueue *vq); + struct virtio_device *vdev; + struct virtqueue_ops *vq_ops; + void *priv; +}; + +/** + * virtqueue_ops - operations for virtqueue abstraction layer + * @add_buf: expose buffer to other end + * vq: the struct virtqueue we're talking about. + * sg: the description of the buffer(s). + * out_num: the number of sg readable by other side + * in_num: the number of sg which are writable (after readable ones) + * data: the token identifying the buffer. + * Returns 0 or an error. + * @kick: update after add_buf + * vq: the struct virtqueue + * After one or more add_buf calls, invoke this to kick the other side. + * @get_buf: get the next used buffer + * vq: the struct virtqueue we're talking about. + * len: the length written into the buffer + * Returns NULL or the "data" token handed to add_buf. + * @restart: restart callbacks after callback returned false. + * vq: the struct virtqueue we're talking about. + * This returns "false" (and doesn't re-enable) if there are pending + * buffers in the queue, to avoid a race. + * @shutdown: "unadd" all buffers. + * vq: the struct virtqueue we're talking about. + * Remove everything from the queue. + * + * Locking rules are straightforward: the driver is responsible for + * locking. No two operations may be invoked simultaneously. + * + * All operations can be called in any context. + */ +struct virtqueue_ops { + int (*add_buf)(struct virtqueue *vq, + struct scatterlist sg[], + unsigned int out_num, + unsigned int in_num, + void *data); + + void (*kick)(struct virtqueue *vq); + + void *(*get_buf)(struct virtqueue *vq, unsigned int *len); + + bool (*restart)(struct virtqueue *vq); + + void (*shutdown)(struct virtqueue *vq); +}; + +/** + * virtio_device - representation of a device using virtio + * @index: unique position on the virtio bus + * @dev: underlying device. + * @id: the device type identification (used to match it with a driver). + * @config: the configuration ops for this device. + * @priv: private pointer for the driver's use. + */ +struct virtio_device +{ + int index; + struct device dev; + struct virtio_device_id id; + struct virtio_config_ops *config; + void *priv; +}; + +int register_virtio_device(struct virtio_device *dev); +void unregister_virtio_device(struct virtio_device *dev); + +/** + * virtio_driver - operations for a virtio I/O driver + * @driver: underlying device driver (populate name and owner). + * @id_table: the ids serviced by this driver. + * @probe: the function to call when a device is found. Returns a token for + * remove, or PTR_ERR(). + * @remove: the function when a device is removed. + */ +struct virtio_driver { + struct device_driver driver; + const struct virtio_device_id *id_table; + int (*probe)(struct virtio_device *dev); + void (*remove)(struct virtio_device *dev); +}; + +int register_virtio_driver(struct virtio_driver *drv); +void unregister_virtio_driver(struct virtio_driver *drv); +#endif /* _LINUX_VIRTIO_H */ diff --git a/include/linux/virtio_blk.h b/include/linux/virtio_blk.h new file mode 100644 index 00000000000..7bd2bce0cfd --- /dev/null +++ b/include/linux/virtio_blk.h @@ -0,0 +1,51 @@ +#ifndef _LINUX_VIRTIO_BLK_H +#define _LINUX_VIRTIO_BLK_H +#include <linux/virtio_config.h> + +/* The ID for virtio_block */ +#define VIRTIO_ID_BLOCK 2 + +/* Feature bits */ +#define VIRTIO_CONFIG_BLK_F 0x40 +#define VIRTIO_BLK_F_BARRIER 1 /* Does host support barriers? */ + +/* The capacity (in 512-byte sectors). */ +#define VIRTIO_CONFIG_BLK_F_CAPACITY 0x41 +/* The maximum segment size. */ +#define VIRTIO_CONFIG_BLK_F_SIZE_MAX 0x42 +/* The maximum number of segments. */ +#define VIRTIO_CONFIG_BLK_F_SEG_MAX 0x43 + +/* These two define direction. */ +#define VIRTIO_BLK_T_IN 0 +#define VIRTIO_BLK_T_OUT 1 + +/* This bit says it's a scsi command, not an actual read or write. */ +#define VIRTIO_BLK_T_SCSI_CMD 2 + +/* Barrier before this op. */ +#define VIRTIO_BLK_T_BARRIER 0x80000000 + +/* This is the first element of the read scatter-gather list. */ +struct virtio_blk_outhdr +{ + /* VIRTIO_BLK_T* */ + __u32 type; + /* io priority. */ + __u32 ioprio; + /* Sector (ie. 512 byte offset) */ + __u64 sector; + /* Where to put reply. */ + __u64 id; +}; + +#define VIRTIO_BLK_S_OK 0 +#define VIRTIO_BLK_S_IOERR 1 +#define VIRTIO_BLK_S_UNSUPP 2 + +/* This is the first element of the write scatter-gather list */ +struct virtio_blk_inhdr +{ + unsigned char status; +}; +#endif /* _LINUX_VIRTIO_BLK_H */ diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h new file mode 100644 index 00000000000..bcc01888df7 --- /dev/null +++ b/include/linux/virtio_config.h @@ -0,0 +1,111 @@ +#ifndef _LINUX_VIRTIO_CONFIG_H +#define _LINUX_VIRTIO_CONFIG_H +/* Virtio devices use a standardized configuration space to define their + * features and pass configuration information, but each implementation can + * store and access that space differently. */ +#include <linux/types.h> + +/* Status byte for guest to report progress, and synchronize config. */ +/* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */ +#define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 +/* We have found a driver for the device. */ +#define VIRTIO_CONFIG_S_DRIVER 2 +/* Driver has used its parts of the config, and is happy */ +#define VIRTIO_CONFIG_S_DRIVER_OK 4 +/* We've given up on this device. */ +#define VIRTIO_CONFIG_S_FAILED 0x80 + +/* Feature byte (actually 7 bits availabe): */ +/* Requirements/features of the virtio implementation. */ +#define VIRTIO_CONFIG_F_VIRTIO 1 +/* Requirements/features of the virtqueue (may have more than one). */ +#define VIRTIO_CONFIG_F_VIRTQUEUE 2 + +#ifdef __KERNEL__ +struct virtio_device; + +/** + * virtio_config_ops - operations for configuring a virtio device + * @find: search for the next configuration field of the given type. + * vdev: the virtio_device + * type: the feature type + * len: the (returned) length of the field if found. + * Returns a token if found, or NULL. Never returnes the same field twice + * (ie. it's used up). + * @get: read the value of a configuration field after find(). + * vdev: the virtio_device + * token: the token returned from find(). + * buf: the buffer to write the field value into. + * len: the length of the buffer (given by find()). + * Note that contents are conventionally little-endian. + * @set: write the value of a configuration field after find(). + * vdev: the virtio_device + * token: the token returned from find(). + * buf: the buffer to read the field value from. + * len: the length of the buffer (given by find()). + * Note that contents are conventionally little-endian. + * @get_status: read the status byte + * vdev: the virtio_device + * Returns the status byte + * @set_status: write the status byte + * vdev: the virtio_device + * status: the new status byte + * @find_vq: find the first VIRTIO_CONFIG_F_VIRTQUEUE and create a virtqueue. + * vdev: the virtio_device + * callback: the virqtueue callback + * Returns the new virtqueue or ERR_PTR(). + * @del_vq: free a virtqueue found by find_vq(). + */ +struct virtio_config_ops +{ + void *(*find)(struct virtio_device *vdev, u8 type, unsigned *len); + void (*get)(struct virtio_device *vdev, void *token, + void *buf, unsigned len); + void (*set)(struct virtio_device *vdev, void *token, + const void *buf, unsigned len); + u8 (*get_status)(struct virtio_device *vdev); + void (*set_status)(struct virtio_device *vdev, u8 status); + struct virtqueue *(*find_vq)(struct virtio_device *vdev, + bool (*callback)(struct virtqueue *)); + void (*del_vq)(struct virtqueue *vq); +}; + +/** + * virtio_config_val - get a single virtio config and mark it used. + * @config: the virtio config space + * @type: the type to search for. + * @val: a pointer to the value to fill in. + * + * Once used, the config type is marked with VIRTIO_CONFIG_F_USED so it can't + * be found again. This version does endian conversion. */ +#define virtio_config_val(vdev, type, v) ({ \ + int _err = __virtio_config_val((vdev),(type),(v),sizeof(*(v))); \ + \ + BUILD_BUG_ON(sizeof(*(v)) != 1 && sizeof(*(v)) != 2 \ + && sizeof(*(v)) != 4 && sizeof(*(v)) != 8); \ + if (!_err) { \ + switch (sizeof(*(v))) { \ + case 2: le16_to_cpus((__u16 *) v); break; \ + case 4: le32_to_cpus((__u32 *) v); break; \ + case 8: le64_to_cpus((__u64 *) v); break; \ + } \ + } \ + _err; \ +}) + +int __virtio_config_val(struct virtio_device *dev, + u8 type, void *val, size_t size); + +/** + * virtio_use_bit - helper to use a feature bit in a bitfield value. + * @dev: the virtio device + * @token: the token as returned from vdev->config->find(). + * @len: the length of the field. + * @bitnum: the bit to test. + * + * If handed a NULL token, it returns false, otherwise returns bit status. + * If it's one, it sets the mirroring acknowledgement bit. */ +int virtio_use_bit(struct virtio_device *vdev, + void *token, unsigned int len, unsigned int bitnum); +#endif /* __KERNEL__ */ +#endif /* _LINUX_VIRTIO_CONFIG_H */ diff --git a/include/linux/virtio_console.h b/include/linux/virtio_console.h new file mode 100644 index 00000000000..ed2d4ead7eb --- /dev/null +++ b/include/linux/virtio_console.h @@ -0,0 +1,12 @@ +#ifndef _LINUX_VIRTIO_CONSOLE_H +#define _LINUX_VIRTIO_CONSOLE_H +#include <linux/virtio_config.h> + +/* The ID for virtio console */ +#define VIRTIO_ID_CONSOLE 3 + +#ifdef __KERNEL__ +int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int)); +#endif /* __KERNEL__ */ + +#endif /* _LINUX_VIRTIO_CONSOLE_H */ diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h new file mode 100644 index 00000000000..ae469ae55d3 --- /dev/null +++ b/include/linux/virtio_net.h @@ -0,0 +1,36 @@ +#ifndef _LINUX_VIRTIO_NET_H +#define _LINUX_VIRTIO_NET_H +#include <linux/virtio_config.h> + +/* The ID for virtio_net */ +#define VIRTIO_ID_NET 1 + +/* The bitmap of config for virtio net */ +#define VIRTIO_CONFIG_NET_F 0x40 +#define VIRTIO_NET_F_NO_CSUM 0 +#define VIRTIO_NET_F_TSO4 1 +#define VIRTIO_NET_F_UFO 2 +#define VIRTIO_NET_F_TSO4_ECN 3 +#define VIRTIO_NET_F_TSO6 4 + +/* The config defining mac address. */ +#define VIRTIO_CONFIG_NET_MAC_F 0x41 + +/* This is the first element of the scatter-gather list. If you don't + * specify GSO or CSUM features, you can simply ignore the header. */ +struct virtio_net_hdr +{ +#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset + __u8 flags; +#define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame +#define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO) +/* FIXME: Do we need this? If they said they can handle ECN, do they care? */ +#define VIRTIO_NET_HDR_GSO_TCPV4_ECN 2 // GSO frame, IPv4 TCP w/ ECN +#define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO) +#define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP + __u8 gso_type; + __u16 gso_size; + __u16 csum_start; + __u16 csum_offset; +}; +#endif /* _LINUX_VIRTIO_NET_H */ diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h new file mode 100644 index 00000000000..ac69e7bb5a1 --- /dev/null +++ b/include/linux/virtio_ring.h @@ -0,0 +1,119 @@ +#ifndef _LINUX_VIRTIO_RING_H +#define _LINUX_VIRTIO_RING_H +/* An interface for efficient virtio implementation, currently for use by KVM + * and lguest, but hopefully others soon. Do NOT change this since it will + * break existing servers and clients. + * + * This header is BSD licensed so anyone can use the definitions to implement + * compatible drivers/servers. + * + * Copyright Rusty Russell IBM Corporation 2007. */ +#include <linux/types.h> + +/* This marks a buffer as continuing via the next field. */ +#define VRING_DESC_F_NEXT 1 +/* This marks a buffer as write-only (otherwise read-only). */ +#define VRING_DESC_F_WRITE 2 + +/* This means don't notify other side when buffer added. */ +#define VRING_USED_F_NO_NOTIFY 1 +/* This means don't interrupt guest when buffer consumed. */ +#define VRING_AVAIL_F_NO_INTERRUPT 1 + +/* Virtio ring descriptors: 16 bytes. These can chain together via "next". */ +struct vring_desc +{ + /* Address (guest-physical). */ + __u64 addr; + /* Length. */ + __u32 len; + /* The flags as indicated above. */ + __u16 flags; + /* We chain unused descriptors via this, too */ + __u16 next; +}; + +struct vring_avail +{ + __u16 flags; + __u16 idx; + __u16 ring[]; +}; + +/* u32 is used here for ids for padding reasons. */ +struct vring_used_elem +{ + /* Index of start of used descriptor chain. */ + __u32 id; + /* Total length of the descriptor chain which was used (written to) */ + __u32 len; +}; + +struct vring_used +{ + __u16 flags; + __u16 idx; + struct vring_used_elem ring[]; +}; + +struct vring { + unsigned int num; + + struct vring_desc *desc; + + struct vring_avail *avail; + + struct vring_used *used; +}; + +/* The standard layout for the ring is a continuous chunk of memory which looks + * like this. The used fields will be aligned to a "num+1" boundary. + * + * struct vring + * { + * // The actual descriptors (16 bytes each) + * struct vring_desc desc[num]; + * + * // A ring of available descriptor heads with free-running index. + * __u16 avail_flags; + * __u16 avail_idx; + * __u16 available[num]; + * + * // Padding so a correctly-chosen num value will cache-align used_idx. + * char pad[sizeof(struct vring_desc) - sizeof(avail_flags)]; + * + * // A ring of used descriptor heads with free-running index. + * __u16 used_flags; + * __u16 used_idx; + * struct vring_used_elem used[num]; + * }; + */ +static inline void vring_init(struct vring *vr, unsigned int num, void *p) +{ + vr->num = num; + vr->desc = p; + vr->avail = p + num*sizeof(struct vring); + vr->used = p + (num+1)*(sizeof(struct vring) + sizeof(__u16)); +} + +static inline unsigned vring_size(unsigned int num) +{ + return (num + 1) * (sizeof(struct vring_desc) + sizeof(__u16)) + + sizeof(__u32) + num * sizeof(struct vring_used_elem); +} + +#ifdef __KERNEL__ +#include <linux/irqreturn.h> +struct virtio_device; +struct virtqueue; + +struct virtqueue *vring_new_virtqueue(unsigned int num, + struct virtio_device *vdev, + void *pages, + void (*notify)(struct virtqueue *vq), + bool (*callback)(struct virtqueue *vq)); +void vring_del_virtqueue(struct virtqueue *vq); + +irqreturn_t vring_interrupt(int irq, void *_vq); +#endif /* __KERNEL__ */ +#endif /* _LINUX_VIRTIO_RING_H */ |