/*
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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, see .
*/
#ifndef __LOCAL_HCI_H
#define __LOCAL_HCI_H
#include
struct gate_pipe_map {
u8 gate;
u8 pipe;
};
struct hcp_message {
u8 header; /* type -cmd,evt,rsp- + instruction */
u8 data[];
} __packed;
struct hcp_packet {
u8 header; /* cbit+pipe */
struct hcp_message message;
} __packed;
struct hcp_exec_waiter {
wait_queue_head_t *wq;
bool exec_complete;
int exec_result;
struct sk_buff *result_skb;
};
struct hci_msg {
struct list_head msg_l;
struct sk_buff_head msg_frags;
bool wait_response;
data_exchange_cb_t cb;
void *cb_context;
unsigned long completion_delay;
};
struct hci_create_pipe_params {
u8 src_gate;
u8 dest_host;
u8 dest_gate;
} __packed;
struct hci_create_pipe_resp {
u8 src_host;
u8 src_gate;
u8 dest_host;
u8 dest_gate;
u8 pipe;
} __packed;
struct hci_delete_pipe_noti {
u8 pipe;
} __packed;
struct hci_all_pipe_cleared_noti {
u8 host;
} __packed;
#define NFC_HCI_FRAGMENT 0x7f
#define HCP_HEADER(type, instr) ((((type) & 0x03) << 6) | ((instr) & 0x3f))
#define HCP_MSG_GET_TYPE(header) ((header & 0xc0) >> 6)
#define HCP_MSG_GET_CMD(header) (header & 0x3f)
int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
u8 type, u8 instruction,
const u8 *payload, size_t payload_len,
data_exchange_cb_t cb, void *cb_context,
unsigned long completion_delay);
void nfc_hci_hcp_message_rx(struct nfc_hci_dev *hdev, u8 pipe, u8 type,
u8 instruction, struct sk_buff *skb);
/* HCP headers */
#define NFC_HCI_HCP_PACKET_HEADER_LEN 1
#define NFC_HCI_HCP_MESSAGE_HEADER_LEN 1
#define NFC_HCI_HCP_HEADER_LEN 2
/* HCP types */
#define NFC_HCI_HCP_COMMAND 0x00
#define NFC_HCI_HCP_EVENT 0x01
#define NFC_HCI_HCP_RESPONSE 0x02
/* Generic commands */
#define NFC_HCI_ANY_SET_PARAMETER 0x01
#define NFC_HCI_ANY_GET_PARAMETER 0x02
#define NFC_HCI_ANY_OPEN_PIPE 0x03
#define NFC_HCI_ANY_CLOSE_PIPE 0x04
/* Reader RF commands */
#define NFC_HCI_WR_XCHG_DATA 0x10
/* Admin commands */
#define NFC_HCI_ADM_CREATE_PIPE 0x10
#define NFC_HCI_ADM_DELETE_PIPE 0x11
#define NFC_HCI_ADM_NOTIFY_PIPE_CREATED 0x12
#define NFC_HCI_ADM_NOTIFY_PIPE_DELETED 0x13
#define NFC_HCI_ADM_CLEAR_ALL_PIPE 0x14
#define NFC_HCI_ADM_NOTIFY_ALL_PIPE_CLEARED 0x15
/* Generic responses */
#define NFC_HCI_ANY_OK 0x00
#define NFC_HCI_ANY_E_NOT_CONNECTED 0x01
#define NFC_HCI_ANY_E_CMD_PAR_UNKNOWN 0x02
#define NFC_HCI_ANY_E_NOK 0x03
#define NFC_HCI_ANY_E_PIPES_FULL 0x04
#define NFC_HCI_ANY_E_REG_PAR_UNKNOWN 0x05
#define NFC_HCI_ANY_E_PIPE_NOT_OPENED 0x06
#define NFC_HCI_ANY_E_CMD_NOT_SUPPORTED 0x07
#define NFC_HCI_ANY_E_INHIBITED 0x08
#define NFC_HCI_ANY_E_TIMEOUT 0x09
#define NFC_HCI_ANY_E_REG_ACCESS_DENIED 0x0a
#define NFC_HCI_ANY_E_PIPE_ACCESS_DENIED 0x0b
#endif /* __LOCAL_HCI_H */
emove&id=6d04dfc8966019b8b0977b2cb942351f13d2b178'>dwarf-regs.c
Merge branch 'sparc64-non-resumable-user-error-recovery'
Liam R. Howlett says:
====================
sparc64: Recover from userspace non-resumable PIO & MEM errors
A non-resumable error from userspace is able to cause a kernel panic or trap
loop due to the setup and handling of the queued traps once in the kernel.
This patch series addresses both of these issues.
The queues are fixed by simply zeroing the memory before use.
PIO errors from userspace will result in a SIGBUS being sent to the user
process.
The MEM errors form userspace will result in a SIGKILL and also cause the
offending pages to be claimed so they are no longer used in future tasks.
SIGKILL is used to ensure that the process does not try to coredump and result
in an attempt to read the memory again from within kernel space. Although
there is a HV call to scrub the memory (mem_scrub), there is no easy way to
guarantee that the real memory address(es) are not used by other tasks.
Clearing the error with mem_scrub would zero the memory and cause the other
processes to proceed with bad data.
The handling of other non-resumable errors remain unchanged and will cause a
panic.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>