drivers/tty/synclink.c

178 struct mgsl_struct {  struct
198 	struct mgsl_struct	*next_device;	/* device list link */  argument
200 	spinlock_t irq_spinlock;		/* spinlock for synchronizing with ISR */
201 	struct work_struct task;		/* task structure for scheduling bh */
203 	u32 EventMask;			/* event trigger mask */
204 	u32 RecordedEvents;		/* pending events */
206 	u32 max_frame_size;		/* as set by device config */
208 	u32 pending_bh;
210 	bool bh_running;		/* Protection from multiple */
211 	int isr_overflow;
212 	bool bh_requested;
214 	int dcd_chkcount;		/* check counts to prevent */
215 	int cts_chkcount;		/* too many IRQs if a signal */
216 	int dsr_chkcount;		/* is floating */
217 	int ri_chkcount;
219 	char *buffer_list;		/* virtual address of Rx & Tx buffer lists */
220 	u32 buffer_list_phys;
221 	dma_addr_t buffer_list_dma_addr;
223 	unsigned int rx_buffer_count;	/* count of total allocated Rx buffers */
224 	DMABUFFERENTRY *rx_buffer_list;	/* list of receive buffer entries */
225 	unsigned int current_rx_buffer;
227 	int num_tx_dma_buffers;		/* number of tx dma frames required */
228  	int tx_dma_buffers_used;
229 	unsigned int tx_buffer_count;	/* count of total allocated Tx buffers */
230 	DMABUFFERENTRY *tx_buffer_list;	/* list of transmit buffer entries */
231 	int start_tx_dma_buffer;	/* tx dma buffer to start tx dma operation */
232 	int current_tx_buffer;          /* next tx dma buffer to be loaded */
234 	unsigned char *intermediate_rxbuffer;
236 	int num_tx_holding_buffers;	/* number of tx holding buffer allocated */
237 	int get_tx_holding_index;  	/* next tx holding buffer for adapter to load */
238 	int put_tx_holding_index;  	/* next tx holding buffer to store user request */
239 	int tx_holding_count;		/* number of tx holding buffers waiting */
240 	struct tx_holding_buffer tx_holding_buffers[MAX_TX_HOLDING_BUFFERS];
242 	bool rx_enabled;
243 	bool rx_overflow;
244 	bool rx_rcc_underrun;
246 	bool tx_enabled;
247 	bool tx_active;
248 	u32 idle_mode;
250 	u16 cmr_value;
251 	u16 tcsr_value;
253 	char device_name[25];		/* device instance name */
255 	unsigned char bus;		/* expansion bus number (zero based) */
256 	unsigned char function;		/* PCI device number */
258 	unsigned int io_base;		/* base I/O address of adapter */
259 	unsigned int io_addr_size;	/* size of the I/O address range */
260 	bool io_addr_requested;		/* true if I/O address requested */
262 	unsigned int irq_level;		/* interrupt level */
263 	unsigned long irq_flags;
264 	bool irq_requested;		/* true if IRQ requested */
266 	unsigned int dma_level;		/* DMA channel */
267 	bool dma_requested;		/* true if dma channel requested */
269 	u16 mbre_bit;
270 	u16 loopback_bits;
271 	u16 usc_idle_mode;
273 	MGSL_PARAMS params;		/* communications parameters */
275 	unsigned char serial_signals;	/* current serial signal states */
277 	bool irq_occurred;		/* for diagnostics use */
278 	unsigned int init_error;	/* Initialization startup error 		(DIAGS)	*/
279 	int	fDiagnosticsmode;	/* Driver in Diagnostic mode?			(DIAGS)	*/
281 	u32 last_mem_alloc;
282 	unsigned char* memory_base;	/* shared memory address (PCI only) */
283 	u32 phys_memory_base;
284 	bool shared_mem_requested;
286 	unsigned char* lcr_base;	/* local config registers (PCI only) */
287 	u32 phys_lcr_base;
288 	u32 lcr_offset;
289 	bool lcr_mem_requested;
291 	u32 misc_ctrl_value;
292 	char *flag_buf;
293 	bool drop_rts_on_tx_done;
295 	bool loopmode_insert_requested;
296 	bool loopmode_send_done_requested;
298 	struct	_input_signal_events	input_signal_events;
301 	int netcount;
302 	spinlock_t netlock;
305 	struct net_device *netdev;