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be2net: account for skb allocation failures
[linux-2.6.git] / drivers / scsi / eata_generic.h
blob5016af5cf860886bdebfded4193753a935777b04
1 /********************************************************
2 * Header file for eata_dma.c and eata_pio.c *
3 * Linux EATA SCSI drivers *
4 * (c) 1993-96 Michael Neuffer *
5 * mike@i-Connect.Net *
6 * neuffer@mail.uni-mainz.de *
7 *********************************************************
8 * last change: 96/08/14 *
9 ********************************************************/
10
11
12 #ifndef _EATA_GENERIC_H
13 #define _EATA_GENERIC_H
14
15
16
17 /*********************************************
18 * Misc. definitions *
19 *********************************************/
20
21 #define R_LIMIT 0x20000
22
23 #define MAXISA 4
24 #define MAXEISA 16
25 #define MAXPCI 16
26 #define MAXIRQ 16
27 #define MAXTARGET 16
28 #define MAXCHANNEL 3
29
30 #define IS_ISA 'I'
31 #define IS_EISA 'E'
32 #define IS_PCI 'P'
33
34 #define BROKEN_INQUIRY 1
35
36 #define BUSMASTER 0xff
37 #define PIO 0xfe
38
39 #define EATA_SIGNATURE 0x45415441 /* BIG ENDIAN coded "EATA" sig. */
40
41 #define DPT_ID1 0x12
42 #define DPT_ID2 0x14
43
44 #define ATT_ID1 0x06
45 #define ATT_ID2 0x94
46 #define ATT_ID3 0x0
47
48 #define NEC_ID1 0x38
49 #define NEC_ID2 0xa3
50 #define NEC_ID3 0x82
51
52
53 #define EATA_CP_SIZE 44
54
55 #define MAX_PCI_DEVICES 32 /* Maximum # Of Devices Per Bus */
56 #define MAX_METHOD_2 16 /* Max Devices For Method 2 */
57 #define MAX_PCI_BUS 16 /* Maximum # Of Busses Allowed */
58
59 #define SG_SIZE 64
60 #define SG_SIZE_BIG 252 /* max. 8096 elements, 64k */
61
62 #define UPPER_DEVICE_QUEUE_LIMIT 64 /* The limit we have to set for the
63 * device queue to keep the broken
64 * midlevel SCSI code from producing
65 * bogus timeouts
66 */
67
68 #define TYPE_DISK_QUEUE 16
69 #define TYPE_TAPE_QUEUE 4
70 #define TYPE_ROM_QUEUE 4
71 #define TYPE_OTHER_QUEUE 2
72
73 #define FREE 0
74 #define OK 0
75 #define NO_TIMEOUT 0
76 #define USED 1
77 #define TIMEOUT 2
78 #define RESET 4
79 #define LOCKED 8
80 #define ABORTED 16
81
82 #define READ 0
83 #define WRITE 1
84 #define OTHER 2
85
86 #define HD(cmd) ((hostdata *)&(cmd->device->host->hostdata))
87 #define CD(cmd) ((struct eata_ccb *)(cmd->host_scribble))
88 #define SD(host) ((hostdata *)&(host->hostdata))
89
90 /***********************************************
91 * EATA Command & Register definitions *
92 ***********************************************/
93 #define PCI_REG_DPTconfig 0x40
94 #define PCI_REG_PumpModeAddress 0x44
95 #define PCI_REG_PumpModeData 0x48
96 #define PCI_REG_ConfigParam1 0x50
97 #define PCI_REG_ConfigParam2 0x54
98
99
100 #define EATA_CMD_PIO_SETUPTEST 0xc6
101 #define EATA_CMD_PIO_READ_CONFIG 0xf0
102 #define EATA_CMD_PIO_SET_CONFIG 0xf1
103 #define EATA_CMD_PIO_SEND_CP 0xf2
104 #define EATA_CMD_PIO_RECEIVE_SP 0xf3
105 #define EATA_CMD_PIO_TRUNC 0xf4
106
107 #define EATA_CMD_RESET 0xf9
108 #define EATA_CMD_IMMEDIATE 0xfa
109
110 #define EATA_CMD_DMA_READ_CONFIG 0xfd
111 #define EATA_CMD_DMA_SET_CONFIG 0xfe
112 #define EATA_CMD_DMA_SEND_CP 0xff
113
114 #define ECS_EMULATE_SENSE 0xd4
115
116 #define EATA_GENERIC_ABORT 0x00
117 #define EATA_SPECIFIC_RESET 0x01
118 #define EATA_BUS_RESET 0x02
119 #define EATA_SPECIFIC_ABORT 0x03
120 #define EATA_QUIET_INTR 0x04
121 #define EATA_COLD_BOOT_HBA 0x06 /* Only as a last resort */
122 #define EATA_FORCE_IO 0x07
123
124 #define HA_CTRLREG 0x206 /* control register for HBA */
125 #define HA_CTRL_DISINT 0x02 /* CTRLREG: disable interrupts */
126 #define HA_CTRL_RESCPU 0x04 /* CTRLREG: reset processor */
127 #define HA_CTRL_8HEADS 0x08 /* CTRLREG: set for drives with*
128 * >=8 heads (WD1003 rudimentary :-) */
129
130 #define HA_WCOMMAND 0x07 /* command register offset */
131 #define HA_WIFC 0x06 /* immediate command offset */
132 #define HA_WCODE 0x05
133 #define HA_WCODE2 0x04
134 #define HA_WDMAADDR 0x02 /* DMA address LSB offset */
135 #define HA_RAUXSTAT 0x08 /* aux status register offset*/
136 #define HA_RSTATUS 0x07 /* status register offset */
137 #define HA_RDATA 0x00 /* data register (16bit) */
138 #define HA_WDATA 0x00 /* data register (16bit) */
139
140 #define HA_ABUSY 0x01 /* aux busy bit */
141 #define HA_AIRQ 0x02 /* aux IRQ pending bit */
142 #define HA_SERROR 0x01 /* pr. command ended in error*/
143 #define HA_SMORE 0x02 /* more data soon to come */
144 #define HA_SCORR 0x04 /* data corrected */
145 #define HA_SDRQ 0x08 /* data request active */
146 #define HA_SSC 0x10 /* seek complete */
147 #define HA_SFAULT 0x20 /* write fault */
148 #define HA_SREADY 0x40 /* drive ready */
149 #define HA_SBUSY 0x80 /* drive busy */
150 #define HA_SDRDY HA_SSC+HA_SREADY+HA_SDRQ
151
152 /**********************************************
153 * Message definitions *
154 **********************************************/
155
156 #define HA_NO_ERROR 0x00 /* No Error */
157 #define HA_ERR_SEL_TO 0x01 /* Selection Timeout */
158 #define HA_ERR_CMD_TO 0x02 /* Command Timeout */
159 #define HA_BUS_RESET 0x03 /* SCSI Bus Reset Received */
160 #define HA_INIT_POWERUP 0x04 /* Initial Controller Power-up */
161 #define HA_UNX_BUSPHASE 0x05 /* Unexpected Bus Phase */
162 #define HA_UNX_BUS_FREE 0x06 /* Unexpected Bus Free */
163 #define HA_BUS_PARITY 0x07 /* Bus Parity Error */
164 #define HA_SCSI_HUNG 0x08 /* SCSI Hung */
165 #define HA_UNX_MSGRJCT 0x09 /* Unexpected Message Rejected */
166 #define HA_RESET_STUCK 0x0a /* SCSI Bus Reset Stuck */
167 #define HA_RSENSE_FAIL 0x0b /* Auto Request-Sense Failed */
168 #define HA_PARITY_ERR 0x0c /* Controller Ram Parity Error */
169 #define HA_CP_ABORT_NA 0x0d /* Abort Message sent to non-active cmd */
170 #define HA_CP_ABORTED 0x0e /* Abort Message sent to active cmd */
171 #define HA_CP_RESET_NA 0x0f /* Reset Message sent to non-active cmd */
172 #define HA_CP_RESET 0x10 /* Reset Message sent to active cmd */
173 #define HA_ECC_ERR 0x11 /* Controller Ram ECC Error */
174 #define HA_PCI_PARITY 0x12 /* PCI Parity Error */
175 #define HA_PCI_MABORT 0x13 /* PCI Master Abort */
176 #define HA_PCI_TABORT 0x14 /* PCI Target Abort */
177 #define HA_PCI_STABORT 0x15 /* PCI Signaled Target Abort */
178
179 /**********************************************
180 * Other definitions *
181 **********************************************/
182
183 struct reg_bit { /* reading this one will clear the interrupt */
184 __u8 error:1; /* previous command ended in an error */
185 __u8 more:1; /* more DATA coming soon, poll BSY & DRQ (PIO) */
186 __u8 corr:1; /* data read was successfully corrected with ECC*/
187 __u8 drq:1; /* data request active */
188 __u8 sc:1; /* seek complete */
189 __u8 fault:1; /* write fault */
190 __u8 ready:1; /* drive ready */
191 __u8 busy:1; /* controller busy */
192 };
193
194 struct reg_abit { /* reading this won't clear the interrupt */
195 __u8 abusy:1; /* auxiliary busy */
196 __u8 irq:1; /* set when drive interrupt is asserted */
197 __u8 dummy:6;
198 };
199
200 struct eata_register { /* EATA register set */
201 __u8 data_reg[2]; /* R, couldn't figure this one out */
202 __u8 cp_addr[4]; /* W, CP address register */
203 union {
204 __u8 command; /* W, command code: [read|set] conf, send CP*/
205 struct reg_bit status; /* R, see register_bit1 */
206 __u8 statusbyte;
207 } ovr;
208 struct reg_abit aux_stat; /* R, see register_bit2 */
209 };
210
211 struct get_conf { /* Read Configuration Array */
212 __u32 len; /* Should return 0x22, 0x24, etc */
213 __u32 signature; /* Signature MUST be "EATA" */
214 __u8 version2:4,
215 version:4; /* EATA Version level */
216 __u8 OCS_enabled:1, /* Overlap Command Support enabled */
217 TAR_support:1, /* SCSI Target Mode supported */
218 TRNXFR:1, /* Truncate Transfer Cmd not necessary *
219 * Only used in PIO Mode */
220 MORE_support:1, /* MORE supported (only PIO Mode) */
221 DMA_support:1, /* DMA supported Driver uses only *
222 * this mode */
223 DMA_valid:1, /* DRQ value in Byte 30 is valid */
224 ATA:1, /* ATA device connected (not supported) */
225 HAA_valid:1; /* Hostadapter Address is valid */
226
227 __u16 cppadlen; /* Number of pad bytes send after CD data *
228 * set to zero for DMA commands */
229 __u8 scsi_id[4]; /* SCSI ID of controller 2-0 Byte 0 res. *
230 * if not, zero is returned */
231 __u32 cplen; /* CP length: number of valid cp bytes */
232 __u32 splen; /* Number of bytes returned after *
233 * Receive SP command */
234 __u16 queuesiz; /* max number of queueable CPs */
235 __u16 dummy;
236 __u16 SGsiz; /* max number of SG table entries */
237 __u8 IRQ:4, /* IRQ used this HA */
238 IRQ_TR:1, /* IRQ Trigger: 0=edge, 1=level */
239 SECOND:1, /* This is a secondary controller */
240 DMA_channel:2; /* DRQ index, DRQ is 2comp of DRQX */
241 __u8 sync; /* device at ID 7 tru 0 is running in *
242 * synchronous mode, this will disappear */
243 __u8 DSBLE:1, /* ISA i/o addressing is disabled */
244 FORCADR:1, /* i/o address has been forced */
245 SG_64K:1,
246 SG_UAE:1,
247 :4;
248 __u8 MAX_ID:5, /* Max number of SCSI target IDs */
249 MAX_CHAN:3; /* Number of SCSI busses on HBA */
250 __u8 MAX_LUN; /* Max number of LUNs */
251 __u8 :3,
252 AUTOTRM:1,
253 M1_inst:1,
254 ID_qest:1, /* Raidnum ID is questionable */
255 is_PCI:1, /* HBA is PCI */
256 is_EISA:1; /* HBA is EISA */
257 __u8 RAIDNUM; /* unique HBA identifier */
258 __u8 unused[474];
259 };
260
261 struct eata_sg_list
262 {
263 __u32 data;
264 __u32 len;
265 };
266
267 struct eata_ccb { /* Send Command Packet structure */
268
269 __u8 SCSI_Reset:1, /* Cause a SCSI Bus reset on the cmd */
270 HBA_Init:1, /* Cause Controller to reinitialize */
271 Auto_Req_Sen:1, /* Do Auto Request Sense on errors */
272 scatter:1, /* Data Ptr points to a SG Packet */
273 Resrvd:1, /* RFU */
274 Interpret:1, /* Interpret the SCSI cdb of own use */
275 DataOut:1, /* Data Out phase with command */
276 DataIn:1; /* Data In phase with command */
277 __u8 reqlen; /* Request Sense Length *
278 * Valid if Auto_Req_Sen=1 */
279 __u8 unused[3];
280 __u8 FWNEST:1, /* send cmd to phys RAID component */
281 unused2:7;
282 __u8 Phsunit:1, /* physical unit on mirrored pair */
283 I_AT:1, /* inhibit address translation */
284 I_HBA_C:1, /* HBA inhibit caching */
285 unused3:5;
286
287 __u8 cp_id:5, /* SCSI Device ID of target */
288 cp_channel:3; /* SCSI Channel # of HBA */
289 __u8 cp_lun:3,
290 :2,
291 cp_luntar:1, /* CP is for target ROUTINE */
292 cp_dispri:1, /* Grant disconnect privilege */
293 cp_identify:1; /* Always TRUE */
294 __u8 cp_msg1; /* Message bytes 0-3 */
295 __u8 cp_msg2;
296 __u8 cp_msg3;
297 __u8 cp_cdb[12]; /* Command Descriptor Block */
298 __u32 cp_datalen; /* Data Transfer Length *
299 * If scatter=1 len of sg package */
300 void *cp_viraddr; /* address of this ccb */
301 __u32 cp_dataDMA; /* Data Address, if scatter=1 *
302 * address of scatter packet */
303 __u32 cp_statDMA; /* address for Status Packet */
304 __u32 cp_reqDMA; /* Request Sense Address, used if *
305 * CP command ends with error */
306 /* Additional CP info begins here */
307 __u32 timestamp; /* Needed to measure command latency */
308 __u32 timeout;
309 __u8 sizeindex;
310 __u8 rw_latency;
311 __u8 retries;
312 __u8 status; /* status of this queueslot */
313 struct scsi_cmnd *cmd; /* address of cmd */
314 struct eata_sg_list *sg_list;
315 };
316
317
318 struct eata_sp {
319 __u8 hba_stat:7, /* HBA status */
320 EOC:1; /* True if command finished */
321 __u8 scsi_stat; /* Target SCSI status */
322 __u8 reserved[2];
323 __u32 residue_len; /* Number of bytes not transferred */
324 struct eata_ccb *ccb; /* Address set in COMMAND PACKET */
325 __u8 msg[12];
326 };
327
328 typedef struct hstd {
329 __u8 vendor[9];
330 __u8 name[18];
331 __u8 revision[6];
332 __u8 EATA_revision;
333 __u32 firmware_revision;
334 __u8 HBA_number;
335 __u8 bustype; /* bustype of HBA */
336 __u8 channel; /* # of avail. scsi channels */
337 __u8 state; /* state of HBA */
338 __u8 primary; /* true if primary */
339 __u8 more_support:1, /* HBA supports MORE flag */
340 immediate_support:1, /* HBA supports IMMEDIATE CMDs*/
341 broken_INQUIRY:1; /* This is an EISA HBA with *
342 * broken INQUIRY */
343 __u8 do_latency; /* Latency measurement flag */
344 __u32 reads[13];
345 __u32 writes[13];
346 __u32 reads_lat[12][4];
347 __u32 writes_lat[12][4];
348 __u32 all_lat[4];
349 __u8 resetlevel[MAXCHANNEL];
350 __u32 last_ccb; /* Last used ccb */
351 __u32 cplen; /* size of CP in words */
352 __u16 cppadlen; /* pad length of cp in words */
353 __u16 queuesize;
354 __u16 sgsize; /* # of entries in the SG list*/
355 __u16 devflags; /* bits set for detected devices */
356 __u8 hostid; /* SCSI ID of HBA */
357 __u8 moresupport; /* HBA supports MORE flag */
358 struct Scsi_Host *next;
359 struct Scsi_Host *prev;
360 struct pci_dev *pdev; /* PCI device or NULL for non PCI */
361 struct eata_sp sp; /* status packet */
362 struct eata_ccb ccb[0]; /* ccb array begins here */
363 }hostdata;
364
365 /* structure for max. 2 emulated drives */
366 struct drive_geom_emul {
367 __u8 trans; /* translation flag 1=transl */
368 __u8 channel; /* SCSI channel number */
369 __u8 HBA; /* HBA number (prim/sec) */
370 __u8 id; /* drive id */
371 __u8 lun; /* drive lun */
372 __u32 heads; /* number of heads */
373 __u32 sectors; /* number of sectors */
374 __u32 cylinder; /* number of cylinders */
375 };
376
377 struct geom_emul {
378 __u8 bios_drives; /* number of emulated drives */
379 struct drive_geom_emul drv[2]; /* drive structures */
380 };
381
382 #endif /* _EATA_GENERIC_H */
383
384 /*
385 * Overrides for Emacs so that we almost follow Linus's tabbing style.
386 * Emacs will notice this stuff at the end of the file and automatically
387 * adjust the settings for this buffer only. This must remain at the end
388 * of the file.
389 * ---------------------------------------------------------------------------
390 * Local variables:
391 * c-indent-level: 4
392 * c-brace-imaginary-offset: 0
393 * c-brace-offset: -4
394 * c-argdecl-indent: 4
395 * c-label-offset: -4
396 * c-continued-statement-offset: 4
397 * c-continued-brace-offset: 0
398 * tab-width: 8
399 * End:
400 */
Linus' kernel tree