1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 Madge Horizon ATM Adapter driver.
4 Copyright (C) 1995-1999 Madge Networks Ltd.
9 IMPORTANT NOTE: Madge Networks no longer makes the adapters
10 supported by this driver and makes no commitment to maintain it.
13 /* too many macros - change to inline functions */
15 #ifndef DRIVER_ATM_HORIZON_H
16 #define DRIVER_ATM_HORIZON_H
19 #ifdef CONFIG_ATM_HORIZON_DEBUG
23 #define DEV_LABEL "hrz"
25 #ifndef PCI_VENDOR_ID_MADGE
26 #define PCI_VENDOR_ID_MADGE 0x10B6
28 #ifndef PCI_DEVICE_ID_MADGE_HORIZON
29 #define PCI_DEVICE_ID_MADGE_HORIZON 0x1000
34 #define PRINTK(severity,format,args...) \
35 printk(severity DEV_LABEL ": " format "\n" , ## args)
39 #define DBG_ERR 0x0001
40 #define DBG_WARN 0x0002
41 #define DBG_INFO 0x0004
42 #define DBG_VCC 0x0008
43 #define DBG_QOS 0x0010
46 #define DBG_SKB 0x0080
47 #define DBG_IRQ 0x0100
48 #define DBG_FLOW 0x0200
49 #define DBG_BUS 0x0400
50 #define DBG_REGS 0x0800
51 #define DBG_DATA 0x1000
52 #define DBG_MASK 0x1fff
54 /* the ## prevents the annoying double expansion of the macro arguments */
55 /* KERN_INFO is used since KERN_DEBUG often does not make it to the console */
56 #define PRINTDB(bits,format,args...) \
57 ( (debug & (bits)) ? printk (KERN_INFO DEV_LABEL ": " format , ## args) : 1 )
58 #define PRINTDM(bits,format,args...) \
59 ( (debug & (bits)) ? printk (format , ## args) : 1 )
60 #define PRINTDE(bits,format,args...) \
61 ( (debug & (bits)) ? printk (format "\n" , ## args) : 1 )
62 #define PRINTD(bits,format,args...) \
63 ( (debug & (bits)) ? printk (KERN_INFO DEV_LABEL ": " format "\n" , ## args) : 1 )
67 #define PRINTD(bits,format,args...)
68 #define PRINTDB(bits,format,args...)
69 #define PRINTDM(bits,format,args...)
70 #define PRINTDE(bits,format,args...)
74 #define PRINTDD(sec,fmt,args...)
75 #define PRINTDDB(sec,fmt,args...)
76 #define PRINTDDM(sec,fmt,args...)
77 #define PRINTDDE(sec,fmt,args...)
81 #define SPARE_BUFFER_POOL_SIZE MAX_VCS
83 #define MIN_PCI_LATENCY 48 // 24 IS TOO SMALL
85 /* Horizon specific bits */
86 /* Register offsets */
88 #define HRZ_IO_EXTENT 0x80
90 #define DATA_PORT_OFF 0x00
91 #define TX_CHANNEL_PORT_OFF 0x04
92 #define TX_DESCRIPTOR_PORT_OFF 0x08
93 #define MEMORY_PORT_OFF 0x0C
94 #define MEM_WR_ADDR_REG_OFF 0x14
95 #define MEM_RD_ADDR_REG_OFF 0x18
96 #define CONTROL_0_REG 0x1C
97 #define INT_SOURCE_REG_OFF 0x20
98 #define INT_ENABLE_REG_OFF 0x24
99 #define MASTER_RX_ADDR_REG_OFF 0x28
100 #define MASTER_RX_COUNT_REG_OFF 0x2C
101 #define MASTER_TX_ADDR_REG_OFF 0x30
102 #define MASTER_TX_COUNT_REG_OFF 0x34
103 #define TX_DESCRIPTOR_REG_OFF 0x38
104 #define TX_CHANNEL_CONFIG_COMMAND_OFF 0x40
105 #define TX_CHANNEL_CONFIG_DATA_OFF 0x44
106 #define TX_FREE_BUFFER_COUNT_OFF 0x48
107 #define RX_FREE_BUFFER_COUNT_OFF 0x4C
108 #define TX_CONFIG_OFF 0x50
109 #define TX_STATUS_OFF 0x54
110 #define RX_CONFIG_OFF 0x58
111 #define RX_LINE_CONFIG_OFF 0x5C
112 #define RX_QUEUE_RD_PTR_OFF 0x60
113 #define RX_QUEUE_WR_PTR_OFF 0x64
114 #define MAX_AAL5_CELL_COUNT_OFF 0x68
115 #define RX_CHANNEL_PORT_OFF 0x6C
116 #define TX_CELL_COUNT_OFF 0x70
117 #define RX_CELL_COUNT_OFF 0x74
118 #define HEC_ERROR_COUNT_OFF 0x78
119 #define UNASSIGNED_CELL_COUNT_OFF 0x7C
121 /* Register bit definitions */
123 /* Control 0 register */
125 #define SEEPROM_DO 0x00000001
126 #define SEEPROM_DI 0x00000002
127 #define SEEPROM_SK 0x00000004
128 #define SEEPROM_CS 0x00000008
129 #define DEBUG_BIT_0 0x00000010
130 #define DEBUG_BIT_1 0x00000020
131 #define DEBUG_BIT_2 0x00000040
132 // RESERVED 0x00000080
133 #define DEBUG_BIT_0_OE 0x00000100
134 #define DEBUG_BIT_1_OE 0x00000200
135 #define DEBUG_BIT_2_OE 0x00000400
136 // RESERVED 0x00000800
137 #define DEBUG_BIT_0_STATE 0x00001000
138 #define DEBUG_BIT_1_STATE 0x00002000
139 #define DEBUG_BIT_2_STATE 0x00004000
140 // RESERVED 0x00008000
141 #define GENERAL_BIT_0 0x00010000
142 #define GENERAL_BIT_1 0x00020000
143 #define GENERAL_BIT_2 0x00040000
144 #define GENERAL_BIT_3 0x00080000
145 #define RESET_HORIZON 0x00100000
146 #define RESET_ATM 0x00200000
147 #define RESET_RX 0x00400000
148 #define RESET_TX 0x00800000
149 #define RESET_HOST 0x01000000
150 // RESERVED 0x02000000
151 #define TARGET_RETRY_DISABLE 0x04000000
152 #define ATM_LAYER_SELECT 0x08000000
153 #define ATM_LAYER_STATUS 0x10000000
154 // RESERVED 0xE0000000
156 /* Interrupt source and enable registers */
158 #define RX_DATA_AV 0x00000001
159 #define RX_DISABLED 0x00000002
160 #define TIMING_MARKER 0x00000004
161 #define FORCED 0x00000008
162 #define RX_BUS_MASTER_COMPLETE 0x00000010
163 #define TX_BUS_MASTER_COMPLETE 0x00000020
164 #define ABR_TX_CELL_COUNT_INT 0x00000040
165 #define DEBUG_INT 0x00000080
166 // RESERVED 0xFFFFFF00
168 /* PIO and Bus Mastering */
170 #define MAX_PIO_COUNT 0x000000ff // 255 - make tunable?
171 // 8188 is a hard limit for bus mastering
172 #define MAX_TRANSFER_COUNT 0x00001ffc // 8188
173 #define MASTER_TX_AUTO_APPEND_DESC 0x80000000
175 /* TX channel config command port */
177 #define PCR_TIMER_ACCESS 0x0000
178 #define SCR_TIMER_ACCESS 0x0001
179 #define BUCKET_CAPACITY_ACCESS 0x0002
180 #define BUCKET_FULLNESS_ACCESS 0x0003
181 #define RATE_TYPE_ACCESS 0x0004
183 #define TX_CHANNEL_CONFIG_MULT 0x0100
185 #define BUCKET_MAX_SIZE 0x003f
187 /* TX channel config data port */
189 #define CLOCK_SELECT_SHIFT 4
190 #define CLOCK_DISABLE 0x00ff
192 #define IDLE_RATE_TYPE 0x0
193 #define ABR_RATE_TYPE 0x1
194 #define VBR_RATE_TYPE 0x2
195 #define CBR_RATE_TYPE 0x3
197 /* TX config register */
199 #define DRVR_DRVRBAR_ENABLE 0x0001
200 #define TXCLK_MUX_SELECT_RCLK 0x0002
201 #define TRANSMIT_TIMING_MARKER 0x0004
202 #define LOOPBACK_TIMING_MARKER 0x0008
203 #define TX_TEST_MODE_16MHz 0x0000
204 #define TX_TEST_MODE_8MHz 0x0010
205 #define TX_TEST_MODE_5_33MHz 0x0020
206 #define TX_TEST_MODE_4MHz 0x0030
207 #define TX_TEST_MODE_3_2MHz 0x0040
208 #define TX_TEST_MODE_2_66MHz 0x0050
209 #define TX_TEST_MODE_2_29MHz 0x0060
210 #define TX_NORMAL_OPERATION 0x0070
211 #define ABR_ROUND_ROBIN 0x0080
213 /* TX status register */
215 #define IDLE_CHANNELS_MASK 0x00FF
216 #define ABR_CELL_COUNT_REACHED_MULT 0x0100
217 #define ABR_CELL_COUNT_REACHED_MASK 0xFF
219 /* RX config register */
221 #define NON_USER_CELLS_IN_ONE_CHANNEL 0x0008
222 #define RX_ENABLE 0x0010
223 #define IGNORE_UNUSED_VPI_VCI_BITS_SET 0x0000
224 #define NON_USER_UNUSED_VPI_VCI_BITS_SET 0x0020
225 #define DISCARD_UNUSED_VPI_VCI_BITS_SET 0x0040
227 /* RX line config register */
229 #define SIGNAL_LOSS 0x0001
230 #define FREQUENCY_DETECT_ERROR 0x0002
231 #define LOCK_DETECT_ERROR 0x0004
232 #define SELECT_INTERNAL_LOOPBACK 0x0008
233 #define LOCK_DETECT_ENABLE 0x0010
234 #define FREQUENCY_DETECT_ENABLE 0x0020
235 #define USER_FRAQ 0x0040
236 #define GXTALOUT_SELECT_DIV4 0x0080
237 #define GXTALOUT_SELECT_NO_GATING 0x0100
238 #define TIMING_MARKER_RECEIVED 0x0200
240 /* RX channel port */
242 #define RX_CHANNEL_MASK 0x03FF
244 #define FLUSH_CHANNEL 0x4000
245 #define RX_CHANNEL_UPDATE_IN_PROGRESS 0x8000
247 /* Receive queue entry */
249 #define RX_Q_ENTRY_LENGTH_MASK 0x0000FFFF
250 #define RX_Q_ENTRY_CHANNEL_SHIFT 16
251 #define SIMONS_DODGEY_MARKER 0x08000000
252 #define RX_CONGESTION_EXPERIENCED 0x10000000
253 #define RX_CRC_10_OK 0x20000000
254 #define RX_CRC_32_OK 0x40000000
255 #define RX_COMPLETE_FRAME 0x80000000
257 /* Offsets and constants for use with the buffer memory */
259 /* Buffer pointers and channel types */
261 #define BUFFER_PTR_MASK 0x0000FFFF
262 #define RX_INT_THRESHOLD_MULT 0x00010000
263 #define RX_INT_THRESHOLD_MASK 0x07FF
264 #define INT_EVERY_N_CELLS 0x08000000
265 #define CONGESTION_EXPERIENCED 0x10000000
266 #define FIRST_CELL_OF_AAL5_FRAME 0x20000000
267 #define CHANNEL_TYPE_AAL5 0x00000000
268 #define CHANNEL_TYPE_RAW_CELLS 0x40000000
269 #define CHANNEL_TYPE_AAL3_4 0x80000000
271 /* Buffer status stuff */
273 #define BUFF_STATUS_MASK 0x00030000
274 #define BUFF_STATUS_EMPTY 0x00000000
275 #define BUFF_STATUS_CELL_AV 0x00010000
276 #define BUFF_STATUS_LAST_CELL_AV 0x00020000
278 /* Transmit channel stuff */
280 /* Receive channel stuff */
282 #define RX_CHANNEL_DISABLED 0x00000000
283 #define RX_CHANNEL_IDLE 0x00000001
287 #define INITIAL_CRC 0xFFFFFFFF
289 // A Horizon u32, a byte! Really nasty. Horizon pointers are (32 bit)
290 // word addresses and so standard C pointer operations break (as they
291 // assume byte addresses); so we pretend that Horizon words (and word
292 // pointers) are bytes (and byte pointers) for the purposes of having
293 // a memory map that works.
297 typedef struct cell_buf {
300 HDW cell_count; // AAL5 rx bufs
303 HDW partial_crc; // AAL5 rx bufs
304 HDW cell_header; // RAW bufs
308 typedef struct tx_ch_desc {
315 typedef struct rx_ch_desc {
320 typedef struct rx_q_entry {
325 #define RX_CHANS 1024
327 #define MAX_VCS RX_CHANS
329 /* Horizon buffer memory map */
331 // TX Channel Descriptors 2
332 // TX Initial Buffers 8 // TX_CHANS
333 #define BUFN1_SIZE 118 // (126 - TX_CHANS)
334 // RX/TX Start/End Buffers 4
335 #define BUFN2_SIZE 124
336 // RX Queue Entries 64
337 #define BUFN3_SIZE 192
338 // RX Channel Descriptors 128
339 #define BUFN4_SIZE 1408
340 // TOTAL cell_buff chunks 2048
342 // cell_buf bufs[2048];
345 typedef struct MEMMAP {
346 tx_ch_desc tx_descs[TX_CHANS]; // 8 * 4 = 32 , 0x0020
347 cell_buf inittxbufs[TX_CHANS]; // these are really
348 cell_buf bufn1[BUFN1_SIZE]; // part of this pool
349 cell_buf txfreebufstart;
350 cell_buf txfreebufend;
351 cell_buf rxfreebufstart;
352 cell_buf rxfreebufend; // 8+118+1+1+1+1+124 = 254
353 cell_buf bufn2[BUFN2_SIZE]; // 16 * 254 = 4064 , 0x1000
354 rx_q_entry rx_q_entries[RX_QS]; // 1 * 1024 = 1024 , 0x1400
355 cell_buf bufn3[BUFN3_SIZE]; // 16 * 192 = 3072 , 0x2000
356 rx_ch_desc rx_descs[MAX_VCS]; // 2 * 1024 = 2048 , 0x2800
357 cell_buf bufn4[BUFN4_SIZE]; // 16 * 1408 = 22528 , 0x8000
360 #define memmap ((MEMMAP *)0)
362 /* end horizon specific bits */
376 // a single struct pointed to by atm_vcc->dev_data
379 unsigned int tx_rate;
380 unsigned int rx_rate;
396 struct sk_buff * rx_skb; // skb being RXed
397 unsigned int rx_bytes; // bytes remaining to RX within region
398 void * rx_addr; // addr to send bytes to (for PIO)
399 unsigned int rx_channel; // channel that the skb is going out on
401 struct sk_buff * tx_skb; // skb being TXed
402 unsigned int tx_bytes; // bytes remaining to TX within region
403 void * tx_addr; // addr to send bytes from (for PIO)
404 struct iovec * tx_iovec; // remaining regions
405 unsigned int tx_regions; // number of remaining regions
408 wait_queue_head_t tx_queue;
415 rx_q_entry * rx_q_reset;
416 rx_q_entry * rx_q_entry;
417 rx_q_entry * rx_q_wrap;
419 struct atm_dev * atm_dev;
423 int noof_spare_buffers;
424 u16 spare_buffers[SPARE_BUFFER_POOL_SIZE];
426 u16 tx_channel_record[TX_CHANS];
428 // this is what we follow when we get incoming data
429 u32 txer[MAX_VCS/32];
430 struct atm_vcc * rxer[MAX_VCS];
432 // cell rate allocation
433 spinlock_t rate_lock;
434 unsigned int rx_avail;
435 unsigned int tx_avail;
438 unsigned long tx_cell_count;
439 unsigned long rx_cell_count;
440 unsigned long hec_error_count;
441 unsigned long unassigned_cell_count;
443 struct pci_dev * pci_dev;
444 struct timer_list housekeeping;
447 typedef struct hrz_dev hrz_dev;
449 /* macros for use later */
451 #define BUF_PTR(cbptr) ((cbptr) - (cell_buf *) 0)
453 #define INTERESTING_INTERRUPTS \
454 (RX_DATA_AV | RX_DISABLED | TX_BUS_MASTER_COMPLETE | RX_BUS_MASTER_COMPLETE)
456 // 190 cells by default (192 TX buffers - 2 elbow room, see docs)
457 #define TX_AAL5_LIMIT (190*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER) // 9112
459 // Have enough RX buffers (unless we allow other buffer splits)
460 #define RX_AAL5_LIMIT ATM_MAX_AAL5_PDU
462 /* multi-statement macro protector */
463 #define DW(x) do{ x } while(0)
465 #define HRZ_DEV(atm_dev) ((hrz_dev *) (atm_dev)->dev_data)
466 #define HRZ_VCC(atm_vcc) ((hrz_vcc *) (atm_vcc)->dev_data)
468 /* Turn the LEDs on and off */
469 // The LEDs bits are upside down in that setting the bit in the debug
470 // register will turn the appropriate LED off.
472 #define YELLOW_LED DEBUG_BIT_0
473 #define GREEN_LED DEBUG_BIT_1
474 #define YELLOW_LED_OE DEBUG_BIT_0_OE
475 #define GREEN_LED_OE DEBUG_BIT_1_OE
477 #define GREEN_LED_OFF(dev) \
478 wr_regl (dev, CONTROL_0_REG, rd_regl (dev, CONTROL_0_REG) | GREEN_LED)
479 #define GREEN_LED_ON(dev) \
480 wr_regl (dev, CONTROL_0_REG, rd_regl (dev, CONTROL_0_REG) &~ GREEN_LED)
481 #define YELLOW_LED_OFF(dev) \
482 wr_regl (dev, CONTROL_0_REG, rd_regl (dev, CONTROL_0_REG) | YELLOW_LED)
483 #define YELLOW_LED_ON(dev) \
484 wr_regl (dev, CONTROL_0_REG, rd_regl (dev, CONTROL_0_REG) &~ YELLOW_LED)
492 #endif /* DRIVER_ATM_HORIZON_H */