diff options
Diffstat (limited to 'qemu/roms/ipxe/src/include/xen/io')
| -rw-r--r-- | qemu/roms/ipxe/src/include/xen/io/netif.h | 307 | ||||
| -rw-r--r-- | qemu/roms/ipxe/src/include/xen/io/ring.h | 314 | ||||
| -rw-r--r-- | qemu/roms/ipxe/src/include/xen/io/xenbus.h | 82 | ||||
| -rw-r--r-- | qemu/roms/ipxe/src/include/xen/io/xs_wire.h | 140 |
4 files changed, 0 insertions, 843 deletions
diff --git a/qemu/roms/ipxe/src/include/xen/io/netif.h b/qemu/roms/ipxe/src/include/xen/io/netif.h deleted file mode 100644 index ae12eab73..000000000 --- a/qemu/roms/ipxe/src/include/xen/io/netif.h +++ /dev/null @@ -1,307 +0,0 @@ -/****************************************************************************** - * netif.h - * - * Unified network-device I/O interface for Xen guest OSes. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to - * deal in the Software without restriction, including without limitation the - * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER - * DEALINGS IN THE SOFTWARE. - * - * Copyright (c) 2003-2004, Keir Fraser - */ - -#ifndef __XEN_PUBLIC_IO_NETIF_H__ -#define __XEN_PUBLIC_IO_NETIF_H__ - -FILE_LICENCE ( MIT ); - -#include "ring.h" -#include "../grant_table.h" - -/* - * Older implementation of Xen network frontend / backend has an - * implicit dependency on the MAX_SKB_FRAGS as the maximum number of - * ring slots a skb can use. Netfront / netback may not work as - * expected when frontend and backend have different MAX_SKB_FRAGS. - * - * A better approach is to add mechanism for netfront / netback to - * negotiate this value. However we cannot fix all possible - * frontends, so we need to define a value which states the minimum - * slots backend must support. - * - * The minimum value derives from older Linux kernel's MAX_SKB_FRAGS - * (18), which is proved to work with most frontends. Any new backend - * which doesn't negotiate with frontend should expect frontend to - * send a valid packet using slots up to this value. - */ -#define XEN_NETIF_NR_SLOTS_MIN 18 - -/* - * Notifications after enqueuing any type of message should be conditional on - * the appropriate req_event or rsp_event field in the shared ring. - * If the client sends notification for rx requests then it should specify - * feature 'feature-rx-notify' via xenbus. Otherwise the backend will assume - * that it cannot safely queue packets (as it may not be kicked to send them). - */ - -/* - * "feature-split-event-channels" is introduced to separate guest TX - * and RX notification. Backend either doesn't support this feature or - * advertises it via xenstore as 0 (disabled) or 1 (enabled). - * - * To make use of this feature, frontend should allocate two event - * channels for TX and RX, advertise them to backend as - * "event-channel-tx" and "event-channel-rx" respectively. If frontend - * doesn't want to use this feature, it just writes "event-channel" - * node as before. - */ - -/* - * Multiple transmit and receive queues: - * If supported, the backend will write the key "multi-queue-max-queues" to - * the directory for that vif, and set its value to the maximum supported - * number of queues. - * Frontends that are aware of this feature and wish to use it can write the - * key "multi-queue-num-queues", set to the number they wish to use, which - * must be greater than zero, and no more than the value reported by the backend - * in "multi-queue-max-queues". - * - * Queues replicate the shared rings and event channels. - * "feature-split-event-channels" may optionally be used when using - * multiple queues, but is not mandatory. - * - * Each queue consists of one shared ring pair, i.e. there must be the same - * number of tx and rx rings. - * - * For frontends requesting just one queue, the usual event-channel and - * ring-ref keys are written as before, simplifying the backend processing - * to avoid distinguishing between a frontend that doesn't understand the - * multi-queue feature, and one that does, but requested only one queue. - * - * Frontends requesting two or more queues must not write the toplevel - * event-channel (or event-channel-{tx,rx}) and {tx,rx}-ring-ref keys, - * instead writing those keys under sub-keys having the name "queue-N" where - * N is the integer ID of the queue for which those keys belong. Queues - * are indexed from zero. For example, a frontend with two queues and split - * event channels must write the following set of queue-related keys: - * - * /local/domain/1/device/vif/0/multi-queue-num-queues = "2" - * /local/domain/1/device/vif/0/queue-0 = "" - * /local/domain/1/device/vif/0/queue-0/tx-ring-ref = "<ring-ref-tx0>" - * /local/domain/1/device/vif/0/queue-0/rx-ring-ref = "<ring-ref-rx0>" - * /local/domain/1/device/vif/0/queue-0/event-channel-tx = "<evtchn-tx0>" - * /local/domain/1/device/vif/0/queue-0/event-channel-rx = "<evtchn-rx0>" - * /local/domain/1/device/vif/0/queue-1 = "" - * /local/domain/1/device/vif/0/queue-1/tx-ring-ref = "<ring-ref-tx1>" - * /local/domain/1/device/vif/0/queue-1/rx-ring-ref = "<ring-ref-rx1" - * /local/domain/1/device/vif/0/queue-1/event-channel-tx = "<evtchn-tx1>" - * /local/domain/1/device/vif/0/queue-1/event-channel-rx = "<evtchn-rx1>" - * - * If there is any inconsistency in the XenStore data, the backend may - * choose not to connect any queues, instead treating the request as an - * error. This includes scenarios where more (or fewer) queues were - * requested than the frontend provided details for. - * - * Mapping of packets to queues is considered to be a function of the - * transmitting system (backend or frontend) and is not negotiated - * between the two. Guests are free to transmit packets on any queue - * they choose, provided it has been set up correctly. Guests must be - * prepared to receive packets on any queue they have requested be set up. - */ - -/* - * "feature-no-csum-offload" should be used to turn IPv4 TCP/UDP checksum - * offload off or on. If it is missing then the feature is assumed to be on. - * "feature-ipv6-csum-offload" should be used to turn IPv6 TCP/UDP checksum - * offload on or off. If it is missing then the feature is assumed to be off. - */ - -/* - * "feature-gso-tcpv4" and "feature-gso-tcpv6" advertise the capability to - * handle large TCP packets (in IPv4 or IPv6 form respectively). Neither - * frontends nor backends are assumed to be capable unless the flags are - * present. - */ - -/* - * This is the 'wire' format for packets: - * Request 1: netif_tx_request -- NETTXF_* (any flags) - * [Request 2: netif_tx_extra] (only if request 1 has NETTXF_extra_info) - * [Request 3: netif_tx_extra] (only if request 2 has XEN_NETIF_EXTRA_MORE) - * Request 4: netif_tx_request -- NETTXF_more_data - * Request 5: netif_tx_request -- NETTXF_more_data - * ... - * Request N: netif_tx_request -- 0 - */ - -/* Protocol checksum field is blank in the packet (hardware offload)? */ -#define _NETTXF_csum_blank (0) -#define NETTXF_csum_blank (1U<<_NETTXF_csum_blank) - -/* Packet data has been validated against protocol checksum. */ -#define _NETTXF_data_validated (1) -#define NETTXF_data_validated (1U<<_NETTXF_data_validated) - -/* Packet continues in the next request descriptor. */ -#define _NETTXF_more_data (2) -#define NETTXF_more_data (1U<<_NETTXF_more_data) - -/* Packet to be followed by extra descriptor(s). */ -#define _NETTXF_extra_info (3) -#define NETTXF_extra_info (1U<<_NETTXF_extra_info) - -#define XEN_NETIF_MAX_TX_SIZE 0xFFFF -struct netif_tx_request { - grant_ref_t gref; /* Reference to buffer page */ - uint16_t offset; /* Offset within buffer page */ - uint16_t flags; /* NETTXF_* */ - uint16_t id; /* Echoed in response message. */ - uint16_t size; /* Packet size in bytes. */ -}; -typedef struct netif_tx_request netif_tx_request_t; - -/* Types of netif_extra_info descriptors. */ -#define XEN_NETIF_EXTRA_TYPE_NONE (0) /* Never used - invalid */ -#define XEN_NETIF_EXTRA_TYPE_GSO (1) /* u.gso */ -#define XEN_NETIF_EXTRA_TYPE_MCAST_ADD (2) /* u.mcast */ -#define XEN_NETIF_EXTRA_TYPE_MCAST_DEL (3) /* u.mcast */ -#define XEN_NETIF_EXTRA_TYPE_MAX (4) - -/* netif_extra_info flags. */ -#define _XEN_NETIF_EXTRA_FLAG_MORE (0) -#define XEN_NETIF_EXTRA_FLAG_MORE (1U<<_XEN_NETIF_EXTRA_FLAG_MORE) - -/* GSO types */ -#define XEN_NETIF_GSO_TYPE_NONE (0) -#define XEN_NETIF_GSO_TYPE_TCPV4 (1) -#define XEN_NETIF_GSO_TYPE_TCPV6 (2) - -/* - * This structure needs to fit within both netif_tx_request and - * netif_rx_response for compatibility. - */ -struct netif_extra_info { - uint8_t type; /* XEN_NETIF_EXTRA_TYPE_* */ - uint8_t flags; /* XEN_NETIF_EXTRA_FLAG_* */ - - union { - /* - * XEN_NETIF_EXTRA_TYPE_GSO: - */ - struct { - /* - * Maximum payload size of each segment. For example, for TCP this - * is just the path MSS. - */ - uint16_t size; - - /* - * GSO type. This determines the protocol of the packet and any - * extra features required to segment the packet properly. - */ - uint8_t type; /* XEN_NETIF_GSO_TYPE_* */ - - /* Future expansion. */ - uint8_t pad; - - /* - * GSO features. This specifies any extra GSO features required - * to process this packet, such as ECN support for TCPv4. - */ - uint16_t features; /* XEN_NETIF_GSO_FEAT_* */ - } gso; - - /* - * XEN_NETIF_EXTRA_TYPE_MCAST_{ADD,DEL}: - * Backend advertises availability via 'feature-multicast-control' - * xenbus node containing value '1'. - * Frontend requests this feature by advertising - * 'request-multicast-control' xenbus node containing value '1'. - * If multicast control is requested then multicast flooding is - * disabled and the frontend must explicitly register its interest - * in multicast groups using dummy transmit requests containing - * MCAST_{ADD,DEL} extra-info fragments. - */ - struct { - uint8_t addr[6]; /* Address to add/remove. */ - } mcast; - - uint16_t pad[3]; - } u; -}; -typedef struct netif_extra_info netif_extra_info_t; - -struct netif_tx_response { - uint16_t id; - int16_t status; /* NETIF_RSP_* */ -}; -typedef struct netif_tx_response netif_tx_response_t; - -struct netif_rx_request { - uint16_t id; /* Echoed in response message. */ - grant_ref_t gref; /* Reference to incoming granted frame */ -}; -typedef struct netif_rx_request netif_rx_request_t; - -/* Packet data has been validated against protocol checksum. */ -#define _NETRXF_data_validated (0) -#define NETRXF_data_validated (1U<<_NETRXF_data_validated) - -/* Protocol checksum field is blank in the packet (hardware offload)? */ -#define _NETRXF_csum_blank (1) -#define NETRXF_csum_blank (1U<<_NETRXF_csum_blank) - -/* Packet continues in the next request descriptor. */ -#define _NETRXF_more_data (2) -#define NETRXF_more_data (1U<<_NETRXF_more_data) - -/* Packet to be followed by extra descriptor(s). */ -#define _NETRXF_extra_info (3) -#define NETRXF_extra_info (1U<<_NETRXF_extra_info) - -struct netif_rx_response { - uint16_t id; - uint16_t offset; /* Offset in page of start of received packet */ - uint16_t flags; /* NETRXF_* */ - int16_t status; /* -ve: NETIF_RSP_* ; +ve: Rx'ed pkt size. */ -}; -typedef struct netif_rx_response netif_rx_response_t; - -/* - * Generate netif ring structures and types. - */ - -DEFINE_RING_TYPES(netif_tx, struct netif_tx_request, struct netif_tx_response); -DEFINE_RING_TYPES(netif_rx, struct netif_rx_request, struct netif_rx_response); - -#define NETIF_RSP_DROPPED -2 -#define NETIF_RSP_ERROR -1 -#define NETIF_RSP_OKAY 0 -/* No response: used for auxiliary requests (e.g., netif_tx_extra). */ -#define NETIF_RSP_NULL 1 - -#endif - -/* - * Local variables: - * mode: C - * c-file-style: "BSD" - * c-basic-offset: 4 - * tab-width: 4 - * indent-tabs-mode: nil - * End: - */ diff --git a/qemu/roms/ipxe/src/include/xen/io/ring.h b/qemu/roms/ipxe/src/include/xen/io/ring.h deleted file mode 100644 index 89d738691..000000000 --- a/qemu/roms/ipxe/src/include/xen/io/ring.h +++ /dev/null @@ -1,314 +0,0 @@ -/****************************************************************************** - * ring.h - * - * Shared producer-consumer ring macros. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to - * deal in the Software without restriction, including without limitation the - * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER - * DEALINGS IN THE SOFTWARE. - * - * Tim Deegan and Andrew Warfield November 2004. - */ - -#ifndef __XEN_PUBLIC_IO_RING_H__ -#define __XEN_PUBLIC_IO_RING_H__ - -FILE_LICENCE ( MIT ); - -#include "../xen-compat.h" - -#if __XEN_INTERFACE_VERSION__ < 0x00030208 -#define xen_mb() mb() -#define xen_rmb() rmb() -#define xen_wmb() wmb() -#endif - -typedef unsigned int RING_IDX; - -/* Round a 32-bit unsigned constant down to the nearest power of two. */ -#define __RD2(_x) (((_x) & 0x00000002) ? 0x2 : ((_x) & 0x1)) -#define __RD4(_x) (((_x) & 0x0000000c) ? __RD2((_x)>>2)<<2 : __RD2(_x)) -#define __RD8(_x) (((_x) & 0x000000f0) ? __RD4((_x)>>4)<<4 : __RD4(_x)) -#define __RD16(_x) (((_x) & 0x0000ff00) ? __RD8((_x)>>8)<<8 : __RD8(_x)) -#define __RD32(_x) (((_x) & 0xffff0000) ? __RD16((_x)>>16)<<16 : __RD16(_x)) - -/* - * Calculate size of a shared ring, given the total available space for the - * ring and indexes (_sz), and the name tag of the request/response structure. - * A ring contains as many entries as will fit, rounded down to the nearest - * power of two (so we can mask with (size-1) to loop around). - */ -#define __CONST_RING_SIZE(_s, _sz) \ - (__RD32(((_sz) - offsetof(struct _s##_sring, ring)) / \ - sizeof(((struct _s##_sring *)0)->ring[0]))) -/* - * The same for passing in an actual pointer instead of a name tag. - */ -#define __RING_SIZE(_s, _sz) \ - (__RD32(((_sz) - (long)(_s)->ring + (long)(_s)) / sizeof((_s)->ring[0]))) - -/* - * Macros to make the correct C datatypes for a new kind of ring. - * - * To make a new ring datatype, you need to have two message structures, - * let's say request_t, and response_t already defined. - * - * In a header where you want the ring datatype declared, you then do: - * - * DEFINE_RING_TYPES(mytag, request_t, response_t); - * - * These expand out to give you a set of types, as you can see below. - * The most important of these are: - * - * mytag_sring_t - The shared ring. - * mytag_front_ring_t - The 'front' half of the ring. - * mytag_back_ring_t - The 'back' half of the ring. - * - * To initialize a ring in your code you need to know the location and size - * of the shared memory area (PAGE_SIZE, for instance). To initialise - * the front half: - * - * mytag_front_ring_t front_ring; - * SHARED_RING_INIT((mytag_sring_t *)shared_page); - * FRONT_RING_INIT(&front_ring, (mytag_sring_t *)shared_page, PAGE_SIZE); - * - * Initializing the back follows similarly (note that only the front - * initializes the shared ring): - * - * mytag_back_ring_t back_ring; - * BACK_RING_INIT(&back_ring, (mytag_sring_t *)shared_page, PAGE_SIZE); - */ - -#define DEFINE_RING_TYPES(__name, __req_t, __rsp_t) \ - \ -/* Shared ring entry */ \ -union __name##_sring_entry { \ - __req_t req; \ - __rsp_t rsp; \ -}; \ - \ -/* Shared ring page */ \ -struct __name##_sring { \ - RING_IDX req_prod, req_event; \ - RING_IDX rsp_prod, rsp_event; \ - union { \ - struct { \ - uint8_t smartpoll_active; \ - } netif; \ - struct { \ - uint8_t msg; \ - } tapif_user; \ - uint8_t pvt_pad[4]; \ - } private; \ - uint8_t __pad[44]; \ - union __name##_sring_entry ring[1]; /* variable-length */ \ -}; \ - \ -/* "Front" end's private variables */ \ -struct __name##_front_ring { \ - RING_IDX req_prod_pvt; \ - RING_IDX rsp_cons; \ - unsigned int nr_ents; \ - struct __name##_sring *sring; \ -}; \ - \ -/* "Back" end's private variables */ \ -struct __name##_back_ring { \ - RING_IDX rsp_prod_pvt; \ - RING_IDX req_cons; \ - unsigned int nr_ents; \ - struct __name##_sring *sring; \ -}; \ - \ -/* Syntactic sugar */ \ -typedef struct __name##_sring __name##_sring_t; \ -typedef struct __name##_front_ring __name##_front_ring_t; \ -typedef struct __name##_back_ring __name##_back_ring_t - -/* - * Macros for manipulating rings. - * - * FRONT_RING_whatever works on the "front end" of a ring: here - * requests are pushed on to the ring and responses taken off it. - * - * BACK_RING_whatever works on the "back end" of a ring: here - * requests are taken off the ring and responses put on. - * - * N.B. these macros do NO INTERLOCKS OR FLOW CONTROL. - * This is OK in 1-for-1 request-response situations where the - * requestor (front end) never has more than RING_SIZE()-1 - * outstanding requests. - */ - -/* Initialising empty rings */ -#define SHARED_RING_INIT(_s) do { \ - (_s)->req_prod = (_s)->rsp_prod = 0; \ - (_s)->req_event = (_s)->rsp_event = 1; \ - (void)memset((_s)->private.pvt_pad, 0, sizeof((_s)->private.pvt_pad)); \ - (void)memset((_s)->__pad, 0, sizeof((_s)->__pad)); \ -} while(0) - -#define FRONT_RING_INIT(_r, _s, __size) do { \ - (_r)->req_prod_pvt = 0; \ - (_r)->rsp_cons = 0; \ - (_r)->nr_ents = __RING_SIZE(_s, __size); \ - (_r)->sring = (_s); \ -} while (0) - -#define BACK_RING_INIT(_r, _s, __size) do { \ - (_r)->rsp_prod_pvt = 0; \ - (_r)->req_cons = 0; \ - (_r)->nr_ents = __RING_SIZE(_s, __size); \ - (_r)->sring = (_s); \ -} while (0) - -/* How big is this ring? */ -#define RING_SIZE(_r) \ - ((_r)->nr_ents) - -/* Number of free requests (for use on front side only). */ -#define RING_FREE_REQUESTS(_r) \ - (RING_SIZE(_r) - ((_r)->req_prod_pvt - (_r)->rsp_cons)) - -/* Test if there is an empty slot available on the front ring. - * (This is only meaningful from the front. ) - */ -#define RING_FULL(_r) \ - (RING_FREE_REQUESTS(_r) == 0) - -/* Test if there are outstanding messages to be processed on a ring. */ -#define RING_HAS_UNCONSUMED_RESPONSES(_r) \ - ((_r)->sring->rsp_prod - (_r)->rsp_cons) - -#ifdef __GNUC__ -#define RING_HAS_UNCONSUMED_REQUESTS(_r) ({ \ - unsigned int req = (_r)->sring->req_prod - (_r)->req_cons; \ - unsigned int rsp = RING_SIZE(_r) - \ - ((_r)->req_cons - (_r)->rsp_prod_pvt); \ - req < rsp ? req : rsp; \ -}) -#else -/* Same as above, but without the nice GCC ({ ... }) syntax. */ -#define RING_HAS_UNCONSUMED_REQUESTS(_r) \ - ((((_r)->sring->req_prod - (_r)->req_cons) < \ - (RING_SIZE(_r) - ((_r)->req_cons - (_r)->rsp_prod_pvt))) ? \ - ((_r)->sring->req_prod - (_r)->req_cons) : \ - (RING_SIZE(_r) - ((_r)->req_cons - (_r)->rsp_prod_pvt))) -#endif - -/* Direct access to individual ring elements, by index. */ -#define RING_GET_REQUEST(_r, _idx) \ - (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].req)) - -#define RING_GET_RESPONSE(_r, _idx) \ - (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].rsp)) - -/* Loop termination condition: Would the specified index overflow the ring? */ -#define RING_REQUEST_CONS_OVERFLOW(_r, _cons) \ - (((_cons) - (_r)->rsp_prod_pvt) >= RING_SIZE(_r)) - -/* Ill-behaved frontend determination: Can there be this many requests? */ -#define RING_REQUEST_PROD_OVERFLOW(_r, _prod) \ - (((_prod) - (_r)->rsp_prod_pvt) > RING_SIZE(_r)) - -#define RING_PUSH_REQUESTS(_r) do { \ - xen_wmb(); /* back sees requests /before/ updated producer index */ \ - (_r)->sring->req_prod = (_r)->req_prod_pvt; \ -} while (0) - -#define RING_PUSH_RESPONSES(_r) do { \ - xen_wmb(); /* front sees resps /before/ updated producer index */ \ - (_r)->sring->rsp_prod = (_r)->rsp_prod_pvt; \ -} while (0) - -/* - * Notification hold-off (req_event and rsp_event): - * - * When queueing requests or responses on a shared ring, it may not always be - * necessary to notify the remote end. For example, if requests are in flight - * in a backend, the front may be able to queue further requests without - * notifying the back (if the back checks for new requests when it queues - * responses). - * - * When enqueuing requests or responses: - * - * Use RING_PUSH_{REQUESTS,RESPONSES}_AND_CHECK_NOTIFY(). The second argument - * is a boolean return value. True indicates that the receiver requires an - * asynchronous notification. - * - * After dequeuing requests or responses (before sleeping the connection): - * - * Use RING_FINAL_CHECK_FOR_REQUESTS() or RING_FINAL_CHECK_FOR_RESPONSES(). - * The second argument is a boolean return value. True indicates that there - * are pending messages on the ring (i.e., the connection should not be put - * to sleep). - * - * These macros will set the req_event/rsp_event field to trigger a - * notification on the very next message that is enqueued. If you want to - * create batches of work (i.e., only receive a notification after several - * messages have been enqueued) then you will need to create a customised - * version of the FINAL_CHECK macro in your own code, which sets the event - * field appropriately. - */ - -#define RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(_r, _notify) do { \ - RING_IDX __old = (_r)->sring->req_prod; \ - RING_IDX __new = (_r)->req_prod_pvt; \ - xen_wmb(); /* back sees requests /before/ updated producer index */ \ - (_r)->sring->req_prod = __new; \ - xen_mb(); /* back sees new requests /before/ we check req_event */ \ - (_notify) = ((RING_IDX)(__new - (_r)->sring->req_event) < \ - (RING_IDX)(__new - __old)); \ -} while (0) - -#define RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(_r, _notify) do { \ - RING_IDX __old = (_r)->sring->rsp_prod; \ - RING_IDX __new = (_r)->rsp_prod_pvt; \ - xen_wmb(); /* front sees resps /before/ updated producer index */ \ - (_r)->sring->rsp_prod = __new; \ - xen_mb(); /* front sees new resps /before/ we check rsp_event */ \ - (_notify) = ((RING_IDX)(__new - (_r)->sring->rsp_event) < \ - (RING_IDX)(__new - __old)); \ -} while (0) - -#define RING_FINAL_CHECK_FOR_REQUESTS(_r, _work_to_do) do { \ - (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \ - if (_work_to_do) break; \ - (_r)->sring->req_event = (_r)->req_cons + 1; \ - xen_mb(); \ - (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \ -} while (0) - -#define RING_FINAL_CHECK_FOR_RESPONSES(_r, _work_to_do) do { \ - (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \ - if (_work_to_do) break; \ - (_r)->sring->rsp_event = (_r)->rsp_cons + 1; \ - xen_mb(); \ - (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \ -} while (0) - -#endif /* __XEN_PUBLIC_IO_RING_H__ */ - -/* - * Local variables: - * mode: C - * c-file-style: "BSD" - * c-basic-offset: 4 - * tab-width: 4 - * indent-tabs-mode: nil - * End: - */ diff --git a/qemu/roms/ipxe/src/include/xen/io/xenbus.h b/qemu/roms/ipxe/src/include/xen/io/xenbus.h deleted file mode 100644 index 182aeb9bc..000000000 --- a/qemu/roms/ipxe/src/include/xen/io/xenbus.h +++ /dev/null @@ -1,82 +0,0 @@ -/***************************************************************************** - * xenbus.h - * - * Xenbus protocol details. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to - * deal in the Software without restriction, including without limitation the - * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER - * DEALINGS IN THE SOFTWARE. - * - * Copyright (C) 2005 XenSource Ltd. - */ - -#ifndef _XEN_PUBLIC_IO_XENBUS_H -#define _XEN_PUBLIC_IO_XENBUS_H - -FILE_LICENCE ( MIT ); - -/* - * The state of either end of the Xenbus, i.e. the current communication - * status of initialisation across the bus. States here imply nothing about - * the state of the connection between the driver and the kernel's device - * layers. - */ -enum xenbus_state { - XenbusStateUnknown = 0, - - XenbusStateInitialising = 1, - - /* - * InitWait: Finished early initialisation but waiting for information - * from the peer or hotplug scripts. - */ - XenbusStateInitWait = 2, - - /* - * Initialised: Waiting for a connection from the peer. - */ - XenbusStateInitialised = 3, - - XenbusStateConnected = 4, - - /* - * Closing: The device is being closed due to an error or an unplug event. - */ - XenbusStateClosing = 5, - - XenbusStateClosed = 6, - - /* - * Reconfiguring: The device is being reconfigured. - */ - XenbusStateReconfiguring = 7, - - XenbusStateReconfigured = 8 -}; -typedef enum xenbus_state XenbusState; - -#endif /* _XEN_PUBLIC_IO_XENBUS_H */ - -/* - * Local variables: - * mode: C - * c-file-style: "BSD" - * c-basic-offset: 4 - * tab-width: 4 - * indent-tabs-mode: nil - * End: - */ diff --git a/qemu/roms/ipxe/src/include/xen/io/xs_wire.h b/qemu/roms/ipxe/src/include/xen/io/xs_wire.h deleted file mode 100644 index 50415f02f..000000000 --- a/qemu/roms/ipxe/src/include/xen/io/xs_wire.h +++ /dev/null @@ -1,140 +0,0 @@ -/* - * Details of the "wire" protocol between Xen Store Daemon and client - * library or guest kernel. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to - * deal in the Software without restriction, including without limitation the - * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER - * DEALINGS IN THE SOFTWARE. - * - * Copyright (C) 2005 Rusty Russell IBM Corporation - */ - -#ifndef _XS_WIRE_H -#define _XS_WIRE_H - -FILE_LICENCE ( MIT ); - -enum xsd_sockmsg_type -{ - XS_DEBUG, - XS_DIRECTORY, - XS_READ, - XS_GET_PERMS, - XS_WATCH, - XS_UNWATCH, - XS_TRANSACTION_START, - XS_TRANSACTION_END, - XS_INTRODUCE, - XS_RELEASE, - XS_GET_DOMAIN_PATH, - XS_WRITE, - XS_MKDIR, - XS_RM, - XS_SET_PERMS, - XS_WATCH_EVENT, - XS_ERROR, - XS_IS_DOMAIN_INTRODUCED, - XS_RESUME, - XS_SET_TARGET, - XS_RESTRICT, - XS_RESET_WATCHES -}; - -#define XS_WRITE_NONE "NONE" -#define XS_WRITE_CREATE "CREATE" -#define XS_WRITE_CREATE_EXCL "CREATE|EXCL" - -/* We hand errors as strings, for portability. */ -struct xsd_errors -{ - int errnum; - const char *errstring; -}; -#ifdef EINVAL -#define XSD_ERROR(x) { x, #x } -/* LINTED: static unused */ -static struct xsd_errors xsd_errors[] -#if defined(__GNUC__) -__attribute__((unused)) -#endif - = { - XSD_ERROR(EINVAL), - XSD_ERROR(EACCES), - XSD_ERROR(EEXIST), - XSD_ERROR(EISDIR), - XSD_ERROR(ENOENT), - XSD_ERROR(ENOMEM), - XSD_ERROR(ENOSPC), - XSD_ERROR(EIO), - XSD_ERROR(ENOTEMPTY), - XSD_ERROR(ENOSYS), - XSD_ERROR(EROFS), - XSD_ERROR(EBUSY), - XSD_ERROR(EAGAIN), - XSD_ERROR(EISCONN), - XSD_ERROR(E2BIG) -}; -#endif - -struct xsd_sockmsg -{ - uint32_t type; /* XS_??? */ - uint32_t req_id;/* Request identifier, echoed in daemon's response. */ - uint32_t tx_id; /* Transaction id (0 if not related to a transaction). */ - uint32_t len; /* Length of data following this. */ - - /* Generally followed by nul-terminated string(s). */ -}; - -enum xs_watch_type -{ - XS_WATCH_PATH = 0, - XS_WATCH_TOKEN -}; - -/* - * `incontents 150 xenstore_struct XenStore wire protocol. - * - * Inter-domain shared memory communications. */ -#define XENSTORE_RING_SIZE 1024 -typedef uint32_t XENSTORE_RING_IDX; -#define MASK_XENSTORE_IDX(idx) ((idx) & (XENSTORE_RING_SIZE-1)) -struct xenstore_domain_interface { - char req[XENSTORE_RING_SIZE]; /* Requests to xenstore daemon. */ - char rsp[XENSTORE_RING_SIZE]; /* Replies and async watch events. */ - XENSTORE_RING_IDX req_cons, req_prod; - XENSTORE_RING_IDX rsp_cons, rsp_prod; -}; - -/* Violating this is very bad. See docs/misc/xenstore.txt. */ -#define XENSTORE_PAYLOAD_MAX 4096 - -/* Violating these just gets you an error back */ -#define XENSTORE_ABS_PATH_MAX 3072 -#define XENSTORE_REL_PATH_MAX 2048 - -#endif /* _XS_WIRE_H */ - -/* - * Local variables: - * mode: C - * c-file-style: "BSD" - * c-basic-offset: 4 - * tab-width: 4 - * indent-tabs-mode: nil - * End: - */ |