litmus-rt.git - The LITMUS^RT kernel.

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Commits per author per week (path 'security/tomoyo/tomoyo.c')

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/* * Ultra Wide Band Radio Control * Event Size Tables management * * Copyright (C) 2005-2006 Intel Corporation * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA. * * * FIXME: docs * * Infrastructure, code and data tables for guessing the size of * events received on the notification endpoints of UWB radio * controllers. * * You define a table of events and for each, its size and how to get * the extra size. * * ENTRY POINTS: * * uwb_est_{init/destroy}(): To initialize/release the EST subsystem. * * uwb_est_[u]register(): To un/register event size tables * uwb_est_grow() * * uwb_est_find_size(): Get the size of an event * uwb_est_get_size() */ #include <linux/spinlock.h> #include <linux/slab.h> #include <linux/export.h> #include "uwb-internal.h" struct uwb_est { u16 type_event_high; u16 vendor, product; u8 entries; const struct uwb_est_entry *entry; }; static struct uwb_est *uwb_est; static u8 uwb_est_size; static u8 uwb_est_used; static DEFINE_RWLOCK(uwb_est_lock); /** * WUSB Standard Event Size Table, HWA-RC interface * * Sizes for events and notifications type 0 (general), high nibble 0. */ static struct uwb_est_entry uwb_est_00_00xx[] = { [UWB_RC_EVT_IE_RCV] = { .size = sizeof(struct uwb_rc_evt_ie_rcv), .offset = 1 + offsetof(struct uwb_rc_evt_ie_rcv, wIELength), }, [UWB_RC_EVT_BEACON] = { .size = sizeof(struct uwb_rc_evt_beacon), .offset = 1 + offsetof(struct uwb_rc_evt_beacon, wBeaconInfoLength), }, [UWB_RC_EVT_BEACON_SIZE] = { .size = sizeof(struct uwb_rc_evt_beacon_size), }, [UWB_RC_EVT_BPOIE_CHANGE] = { .size = sizeof(struct uwb_rc_evt_bpoie_change), .offset = 1 + offsetof(struct uwb_rc_evt_bpoie_change, wBPOIELength), }, [UWB_RC_EVT_BP_SLOT_CHANGE] = { .size = sizeof(struct uwb_rc_evt_bp_slot_change), }, [UWB_RC_EVT_BP_SWITCH_IE_RCV] = { .size = sizeof(struct uwb_rc_evt_bp_switch_ie_rcv), .offset = 1 + offsetof(struct uwb_rc_evt_bp_switch_ie_rcv, wIELength), }, [UWB_RC_EVT_DEV_ADDR_CONFLICT] = { .size = sizeof(struct uwb_rc_evt_dev_addr_conflict), }, [UWB_RC_EVT_DRP_AVAIL] = { .size = sizeof(struct uwb_rc_evt_drp_avail) }, [UWB_RC_EVT_DRP] = { .size = sizeof(struct uwb_rc_evt_drp), .offset = 1 + offsetof(struct uwb_rc_evt_drp, ie_length), }, [UWB_RC_EVT_BP_SWITCH_STATUS] = { .size = sizeof(struct uwb_rc_evt_bp_switch_status), }, [UWB_RC_EVT_CMD_FRAME_RCV] = { .size = sizeof(struct uwb_rc_evt_cmd_frame_rcv), .offset = 1 + offsetof(struct uwb_rc_evt_cmd_frame_rcv, dataLength), }, [UWB_RC_EVT_CHANNEL_CHANGE_IE_RCV] = { .size = sizeof(struct uwb_rc_evt_channel_change_ie_rcv), .offset = 1 + offsetof(struct uwb_rc_evt_channel_change_ie_rcv, wIELength), }, [UWB_RC_CMD_CHANNEL_CHANGE] = { .size = sizeof(struct uwb_rc_evt_confirm), }, [UWB_RC_CMD_DEV_ADDR_MGMT] = { .size = sizeof(struct uwb_rc_evt_dev_addr_mgmt) }, [UWB_RC_CMD_GET_IE] = { .size = sizeof(struct uwb_rc_evt_get_ie), .offset = 1 + offsetof(struct uwb_rc_evt_get_ie, wIELength), }, [UWB_RC_CMD_RESET] = { .size = sizeof(struct uwb_rc_evt_confirm), }, [UWB_RC_CMD_SCAN] = { .size = sizeof(struct uwb_rc_evt_confirm), }, [UWB_RC_CMD_SET_BEACON_FILTER] = { .size = sizeof(struct uwb_rc_evt_confirm), }, [UWB_RC_CMD_SET_DRP_IE] = { .size = sizeof(struct uwb_rc_evt_set_drp_ie), }, [UWB_RC_CMD_SET_IE] = { .size = sizeof(struct uwb_rc_evt_set_ie), }, [UWB_RC_CMD_SET_NOTIFICATION_FILTER] = { .size = sizeof(struct uwb_rc_evt_confirm), }, [UWB_RC_CMD_SET_TX_POWER] = { .size = sizeof(struct uwb_rc_evt_confirm), }, [UWB_RC_CMD_SLEEP] = { .size = sizeof(struct uwb_rc_evt_confirm), }, [UWB_RC_CMD_START_BEACON] = { .size = sizeof(struct uwb_rc_evt_confirm), }, [UWB_RC_CMD_STOP_BEACON] = { .size = sizeof(struct uwb_rc_evt_confirm), }, [UWB_RC_CMD_BP_MERGE] = { .size = sizeof(struct uwb_rc_evt_confirm), }, [UWB_RC_CMD_SEND_COMMAND_FRAME] = { .size = sizeof(struct uwb_rc_evt_confirm), }, [UWB_RC_CMD_SET_ASIE_NOTIF] = { .size = sizeof(struct uwb_rc_evt_confirm), }, }; static struct uwb_est_entry uwb_est_01_00xx[] = { [UWB_RC_DAA_ENERGY_DETECTED] = { .size = sizeof(struct uwb_rc_evt_daa_energy_detected), }, [UWB_RC_SET_DAA_ENERGY_MASK] = { .size = sizeof(struct uwb_rc_evt_set_daa_energy_mask), }, [UWB_RC_SET_NOTIFICATION_FILTER_EX] = { .size = sizeof(struct uwb_rc_evt_set_notification_filter_ex), }, }; /** * Initialize the EST subsystem * * Register the standard tables also. * * FIXME: tag init */ int uwb_est_create(void) { int result; uwb_est_size = 2; uwb_est_used = 0; uwb_est = kzalloc(uwb_est_size * sizeof(uwb_est[0]), GFP_KERNEL); if (uwb_est == NULL) return -ENOMEM; result = uwb_est_register(UWB_RC_CET_GENERAL, 0, 0xffff, 0xffff, uwb_est_00_00xx, ARRAY_SIZE(uwb_est_00_00xx)); if (result < 0) goto out; result = uwb_est_register(UWB_RC_CET_EX_TYPE_1, 0, 0xffff, 0xffff, uwb_est_01_00xx, ARRAY_SIZE(uwb_est_01_00xx)); out: return result; } /** Clean it up */ void uwb_est_destroy(void) { kfree(uwb_est); uwb_est = NULL; uwb_est_size = uwb_est_used = 0; } /** * Double the capacity of the EST table * * @returns 0 if ok, < 0 errno no error. */ static int uwb_est_grow(void) { size_t actual_size = uwb_est_size * sizeof(uwb_est[0]); void *new = kmalloc(2 * actual_size, GFP_ATOMIC); if (new == NULL) return -ENOMEM; memcpy(new, uwb_est, actual_size); memset(new + actual_size, 0, actual_size); kfree(uwb_est); uwb_est = new; uwb_est_size *= 2; return 0; } /** * Register an event size table * * Makes room for it if the table is full, and then inserts it in the * right position (entries are sorted by type, event_high, vendor and * then product). * * @vendor: vendor code for matching against the device (0x0000 and * 0xffff mean any); use 0x0000 to force all to match without * checking possible vendor specific ones, 0xfffff to match * after checking vendor specific ones. * * @product: product code from that vendor; same matching rules, use * 0x0000 for not allowing vendor specific matches, 0xffff * for allowing. * * This arragement just makes the tables sort differenty. Because the * table is sorted by growing type-event_high-vendor-product, a zero * vendor will match before than a 0x456a vendor, that will match * before a 0xfffff vendor. * * @returns 0 if ok, < 0 errno on error (-ENOENT if not found). */ /* FIXME: add bus type to vendor/product code */ int uwb_est_register(u8 type, u8 event_high, u16 vendor, u16 product, const struct uwb_est_entry *entry, size_t entries) { unsigned long flags; unsigned itr; u16 type_event_high; int result = 0; write_lock_irqsave(&uwb_est_lock, flags); if (uwb_est_used == uwb_est_size) { result = uwb_est_grow(); if (result < 0) goto out; } /* Find the right spot to insert it in */ type_event_high = type << 8 | event_high; for (itr = 0; itr < uwb_est_used; itr++) if (uwb_est[itr].type_event_high < type && uwb_est[itr].vendor < vendor && uwb_est[itr].product < product) break; /* Shift others to make room for the new one? */ if (itr < uwb_est_used) memmove(&uwb_est[itr+1], &uwb_est[itr], uwb_est_used - itr);


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