xref: /linux/drivers/scsi/be2iscsi/be_main.h (revision 1ac731c529cd4d6adbce134754b51ff7d822b145)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright 2017 Broadcom. All Rights Reserved.
4  * The term "Broadcom" refers to Broadcom Limited and/or its subsidiaries.
5  *
6  * Contact Information:
7  * linux-drivers@broadcom.com
8  */
9 
10 #ifndef _BEISCSI_MAIN_
11 #define _BEISCSI_MAIN_
12 
13 #include <linux/kernel.h>
14 #include <linux/pci.h>
15 #include <linux/if_ether.h>
16 #include <linux/in.h>
17 #include <linux/ctype.h>
18 #include <linux/module.h>
19 #include <scsi/scsi.h>
20 #include <scsi/scsi_cmnd.h>
21 #include <scsi/scsi_device.h>
22 #include <scsi/scsi_host.h>
23 #include <scsi/iscsi_proto.h>
24 #include <scsi/libiscsi.h>
25 #include <scsi/scsi_transport_iscsi.h>
26 
27 #define DRV_NAME		"be2iscsi"
28 #define BUILD_STR		"11.4.0.1"
29 #define BE_NAME			"Emulex OneConnect" \
30 				"Open-iSCSI Driver version" BUILD_STR
31 #define DRV_DESC		BE_NAME " " "Driver"
32 
33 #define BE_VENDOR_ID		0x19A2
34 #define ELX_VENDOR_ID		0x10DF
35 /* DEVICE ID's for BE2 */
36 #define BE_DEVICE_ID1		0x212
37 #define OC_DEVICE_ID1		0x702
38 #define OC_DEVICE_ID2		0x703
39 
40 /* DEVICE ID's for BE3 */
41 #define BE_DEVICE_ID2		0x222
42 #define OC_DEVICE_ID3		0x712
43 
44 /* DEVICE ID for SKH */
45 #define OC_SKH_ID1		0x722
46 
47 #define BE2_IO_DEPTH		1024
48 #define BE2_MAX_SESSIONS	256
49 #define BE2_TMFS		16
50 #define BE2_NOPOUT_REQ		16
51 #define BE2_SGE			32
52 #define BE2_DEFPDU_HDR_SZ	64
53 #define BE2_DEFPDU_DATA_SZ	8192
54 #define BE2_MAX_NUM_CQ_PROC	512
55 
56 #define MAX_CPUS		64U
57 #define BEISCSI_MAX_NUM_CPUS	7
58 
59 #define BEISCSI_VER_STRLEN 32
60 
61 #define BEISCSI_SGLIST_ELEMENTS	30
62 
63 /**
64  * BE_INVLDT_CMD_TBL_SZ is 128 which is total number commands that can
65  * be invalidated at a time, consider it before changing the value of
66  * BEISCSI_CMD_PER_LUN.
67  */
68 #define BEISCSI_CMD_PER_LUN	128	/* scsi_host->cmd_per_lun */
69 #define BEISCSI_MAX_SECTORS	1024	/* scsi_host->max_sectors */
70 #define BEISCSI_TEMPLATE_HDR_PER_CXN_SIZE 128 /* Template size per cxn */
71 
72 #define BEISCSI_MAX_CMD_LEN	16	/* scsi_host->max_cmd_len */
73 #define BEISCSI_NUM_MAX_LUN	256	/* scsi_host->max_lun */
74 #define BEISCSI_MAX_FRAGS_INIT	192
75 
76 #define BE_SENSE_INFO_SIZE		258
77 #define BE_ISCSI_PDU_HEADER_SIZE	64
78 #define BE_MIN_MEM_SIZE			16384
79 #define MAX_CMD_SZ			65536
80 #define IIOC_SCSI_DATA                  0x05	/* Write Operation */
81 
82 /**
83  * hardware needs the async PDU buffers to be posted in multiples of 8
84  * So have atleast 8 of them by default
85  */
86 
87 #define HWI_GET_ASYNC_PDU_CTX(phwi, ulp_num)	\
88 	(phwi->phwi_ctxt->pasync_ctx[ulp_num])
89 
90 /********* Memory BAR register ************/
91 #define PCICFG_MEMBAR_CTRL_INT_CTRL_OFFSET	0xfc
92 /**
93  * Host Interrupt Enable, if set interrupts are enabled although "PCI Interrupt
94  * Disable" may still globally block interrupts in addition to individual
95  * interrupt masks; a mechanism for the device driver to block all interrupts
96  * atomically without having to arbitrate for the PCI Interrupt Disable bit
97  * with the OS.
98  */
99 #define MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK	(1 << 29)	/* bit 29 */
100 
101 /********* ISR0 Register offset **********/
102 #define CEV_ISR0_OFFSET				0xC18
103 #define CEV_ISR_SIZE				4
104 
105 /**
106  * Macros for reading/writing a protection domain or CSR registers
107  * in BladeEngine.
108  */
109 
110 #define DB_TXULP0_OFFSET 0x40
111 #define DB_RXULP0_OFFSET 0xA0
112 /********* Event Q door bell *************/
113 #define DB_EQ_OFFSET			DB_CQ_OFFSET
114 #define DB_EQ_RING_ID_LOW_MASK		0x1FF	/* bits 0 - 8 */
115 /* Clear the interrupt for this eq */
116 #define DB_EQ_CLR_SHIFT			(9)	/* bit 9 */
117 /* Must be 1 */
118 #define DB_EQ_EVNT_SHIFT		(10)	/* bit 10 */
119 /* Higher Order EQ_ID bit */
120 #define DB_EQ_RING_ID_HIGH_MASK	0x1F /* bits 11 - 15 */
121 #define DB_EQ_HIGH_SET_SHIFT	11
122 #define DB_EQ_HIGH_FEILD_SHIFT	9
123 /* Number of event entries processed */
124 #define DB_EQ_NUM_POPPED_SHIFT		(16)	/* bits 16 - 28 */
125 /* Rearm bit */
126 #define DB_EQ_REARM_SHIFT		(29)	/* bit 29 */
127 
128 /********* Compl Q door bell *************/
129 #define DB_CQ_OFFSET			0x120
130 #define DB_CQ_RING_ID_LOW_MASK		0x3FF	/* bits 0 - 9 */
131 /* Higher Order CQ_ID bit */
132 #define DB_CQ_RING_ID_HIGH_MASK	0x1F /* bits 11 - 15 */
133 #define DB_CQ_HIGH_SET_SHIFT	11
134 #define DB_CQ_HIGH_FEILD_SHIFT	10
135 
136 /* Number of event entries processed */
137 #define DB_CQ_NUM_POPPED_SHIFT		(16)	/* bits 16 - 28 */
138 /* Rearm bit */
139 #define DB_CQ_REARM_SHIFT		(29)	/* bit 29 */
140 
141 #define GET_HWI_CONTROLLER_WS(pc)	(pc->phwi_ctrlr)
142 #define HWI_GET_DEF_BUFQ_ID(pc, ulp_num) (((struct hwi_controller *)\
143 		(GET_HWI_CONTROLLER_WS(pc)))->default_pdu_data[ulp_num].id)
144 #define HWI_GET_DEF_HDRQ_ID(pc, ulp_num) (((struct hwi_controller *)\
145 		(GET_HWI_CONTROLLER_WS(pc)))->default_pdu_hdr[ulp_num].id)
146 
147 #define PAGES_REQUIRED(x) \
148 	((x < PAGE_SIZE) ? 1 :  ((x + PAGE_SIZE - 1) / PAGE_SIZE))
149 
150 #define MEM_DESCR_OFFSET 8
151 #define BEISCSI_DEFQ_HDR 1
152 #define BEISCSI_DEFQ_DATA 0
153 enum be_mem_enum {
154 	HWI_MEM_ADDN_CONTEXT,
155 	HWI_MEM_WRB,
156 	HWI_MEM_WRBH,
157 	HWI_MEM_SGLH,
158 	HWI_MEM_SGE,
159 	HWI_MEM_TEMPLATE_HDR_ULP0,
160 	HWI_MEM_ASYNC_HEADER_BUF_ULP0,	/* 6 */
161 	HWI_MEM_ASYNC_DATA_BUF_ULP0,
162 	HWI_MEM_ASYNC_HEADER_RING_ULP0,
163 	HWI_MEM_ASYNC_DATA_RING_ULP0,
164 	HWI_MEM_ASYNC_HEADER_HANDLE_ULP0,
165 	HWI_MEM_ASYNC_DATA_HANDLE_ULP0,	/* 11 */
166 	HWI_MEM_ASYNC_PDU_CONTEXT_ULP0,
167 	HWI_MEM_TEMPLATE_HDR_ULP1,
168 	HWI_MEM_ASYNC_HEADER_BUF_ULP1,	/* 14 */
169 	HWI_MEM_ASYNC_DATA_BUF_ULP1,
170 	HWI_MEM_ASYNC_HEADER_RING_ULP1,
171 	HWI_MEM_ASYNC_DATA_RING_ULP1,
172 	HWI_MEM_ASYNC_HEADER_HANDLE_ULP1,
173 	HWI_MEM_ASYNC_DATA_HANDLE_ULP1,	/* 19 */
174 	HWI_MEM_ASYNC_PDU_CONTEXT_ULP1,
175 	ISCSI_MEM_GLOBAL_HEADER,
176 	SE_MEM_MAX
177 };
178 
179 struct be_bus_address32 {
180 	unsigned int address_lo;
181 	unsigned int address_hi;
182 };
183 
184 struct be_bus_address64 {
185 	unsigned long long address;
186 };
187 
188 struct be_bus_address {
189 	union {
190 		struct be_bus_address32 a32;
191 		struct be_bus_address64 a64;
192 	} u;
193 };
194 
195 struct mem_array {
196 	struct be_bus_address bus_address;	/* Bus address of location */
197 	void *virtual_address;		/* virtual address to the location */
198 	unsigned int size;		/* Size required by memory block */
199 };
200 
201 struct be_mem_descriptor {
202 	unsigned int size_in_bytes;	/* Size required by memory block */
203 	unsigned int num_elements;
204 	struct mem_array *mem_array;
205 };
206 
207 struct sgl_handle {
208 	unsigned int sgl_index;
209 	unsigned int type;
210 	unsigned int cid;
211 	struct iscsi_task *task;
212 	struct iscsi_sge *pfrag;
213 };
214 
215 struct hba_parameters {
216 	unsigned int ios_per_ctrl;
217 	unsigned int cxns_per_ctrl;
218 	unsigned int icds_per_ctrl;
219 	unsigned int num_sge_per_io;
220 	unsigned int defpdu_hdr_sz;
221 	unsigned int defpdu_data_sz;
222 	unsigned int num_cq_entries;
223 	unsigned int num_eq_entries;
224 	unsigned int wrbs_per_cxn;
225 	unsigned int hwi_ws_sz;
226 };
227 
228 #define BEISCSI_GET_ULP_FROM_CRI(phwi_ctrlr, cri) \
229 	(phwi_ctrlr->wrb_context[cri].ulp_num)
230 struct hwi_wrb_context {
231 	spinlock_t wrb_lock;
232 	struct wrb_handle **pwrb_handle_base;
233 	struct wrb_handle **pwrb_handle_basestd;
234 	struct iscsi_wrb *plast_wrb;
235 	unsigned short alloc_index;
236 	unsigned short free_index;
237 	unsigned short wrb_handles_available;
238 	unsigned short cid;
239 	uint8_t ulp_num;	/* ULP to which CID binded */
240 	uint32_t doorbell_offset;
241 };
242 
243 struct ulp_cid_info {
244 	unsigned short *cid_array;
245 	unsigned short avlbl_cids;
246 	unsigned short cid_alloc;
247 	unsigned short cid_free;
248 };
249 
250 #include "be.h"
251 #define chip_be2(phba)      (phba->generation == BE_GEN2)
252 #define chip_be3_r(phba)    (phba->generation == BE_GEN3)
253 #define is_chip_be2_be3r(phba) (chip_be3_r(phba) || (chip_be2(phba)))
254 
255 #define BEISCSI_ULP0    0
256 #define BEISCSI_ULP1    1
257 #define BEISCSI_ULP_COUNT   2
258 #define BEISCSI_ULP0_LOADED 0x01
259 #define BEISCSI_ULP1_LOADED 0x02
260 
261 #define BEISCSI_ULP_AVLBL_CID(phba, ulp_num) \
262 	(((struct ulp_cid_info *)phba->cid_array_info[ulp_num])->avlbl_cids)
263 #define BEISCSI_ULP0_AVLBL_CID(phba) \
264 	BEISCSI_ULP_AVLBL_CID(phba, BEISCSI_ULP0)
265 #define BEISCSI_ULP1_AVLBL_CID(phba) \
266 	BEISCSI_ULP_AVLBL_CID(phba, BEISCSI_ULP1)
267 
268 struct beiscsi_hba {
269 	struct hba_parameters params;
270 	struct hwi_controller *phwi_ctrlr;
271 	unsigned int mem_req[SE_MEM_MAX];
272 	/* PCI BAR mapped addresses */
273 	u8 __iomem *csr_va;	/* CSR */
274 	u8 __iomem *db_va;	/* Door  Bell  */
275 	u8 __iomem *pci_va;	/* PCI Config */
276 	/* PCI representation of our HBA */
277 	struct pci_dev *pcidev;
278 	unsigned int num_cpus;
279 	unsigned int nxt_cqid;
280 	char *msi_name[MAX_CPUS];
281 	struct be_mem_descriptor *init_mem;
282 
283 	unsigned short io_sgl_alloc_index;
284 	unsigned short io_sgl_free_index;
285 	unsigned short io_sgl_hndl_avbl;
286 	struct sgl_handle **io_sgl_hndl_base;
287 
288 	unsigned short eh_sgl_alloc_index;
289 	unsigned short eh_sgl_free_index;
290 	unsigned short eh_sgl_hndl_avbl;
291 	struct sgl_handle **eh_sgl_hndl_base;
292 	spinlock_t io_sgl_lock;
293 	spinlock_t mgmt_sgl_lock;
294 	spinlock_t async_pdu_lock;
295 	struct list_head hba_queue;
296 #define BE_MAX_SESSION 2048
297 #define BE_INVALID_CID 0xffff
298 #define BE_SET_CID_TO_CRI(cri_index, cid) \
299 			  (phba->cid_to_cri_map[cid] = cri_index)
300 #define BE_GET_CRI_FROM_CID(cid) (phba->cid_to_cri_map[cid])
301 	unsigned short cid_to_cri_map[BE_MAX_SESSION];
302 	struct ulp_cid_info *cid_array_info[BEISCSI_ULP_COUNT];
303 	struct iscsi_endpoint **ep_array;
304 	struct beiscsi_conn **conn_table;
305 	struct Scsi_Host *shost;
306 	struct iscsi_iface *ipv4_iface;
307 	struct iscsi_iface *ipv6_iface;
308 	struct {
309 		/**
310 		 * group together since they are used most frequently
311 		 * for cid to cri conversion
312 		 */
313 #define BEISCSI_PHYS_PORT_MAX	4
314 		unsigned int phys_port;
315 		/* valid values of phys_port id are 0, 1, 2, 3 */
316 		unsigned int eqid_count;
317 		unsigned int cqid_count;
318 		unsigned int iscsi_cid_start[BEISCSI_ULP_COUNT];
319 #define BEISCSI_GET_CID_COUNT(phba, ulp_num) \
320 		(phba->fw_config.iscsi_cid_count[ulp_num])
321 		unsigned int iscsi_cid_count[BEISCSI_ULP_COUNT];
322 		unsigned int iscsi_icd_count[BEISCSI_ULP_COUNT];
323 		unsigned int iscsi_icd_start[BEISCSI_ULP_COUNT];
324 		unsigned int iscsi_chain_start[BEISCSI_ULP_COUNT];
325 		unsigned int iscsi_chain_count[BEISCSI_ULP_COUNT];
326 
327 		unsigned short iscsi_features;
328 		uint16_t dual_ulp_aware;
329 		unsigned long ulp_supported;
330 	} fw_config;
331 
332 	unsigned long state;
333 #define BEISCSI_HBA_ONLINE	0
334 #define BEISCSI_HBA_LINK_UP	1
335 #define BEISCSI_HBA_BOOT_FOUND	2
336 #define BEISCSI_HBA_BOOT_WORK	3
337 #define BEISCSI_HBA_UER_SUPP	4
338 #define BEISCSI_HBA_PCI_ERR	5
339 #define BEISCSI_HBA_FW_TIMEOUT	6
340 #define BEISCSI_HBA_IN_UE	7
341 #define BEISCSI_HBA_IN_TPE	8
342 
343 /* error bits */
344 #define BEISCSI_HBA_IN_ERR	((1 << BEISCSI_HBA_PCI_ERR) | \
345 				 (1 << BEISCSI_HBA_FW_TIMEOUT) | \
346 				 (1 << BEISCSI_HBA_IN_UE) | \
347 				 (1 << BEISCSI_HBA_IN_TPE))
348 
349 	u8 optic_state;
350 	struct delayed_work eqd_update;
351 	/* update EQ delay timer every 1000ms */
352 #define BEISCSI_EQD_UPDATE_INTERVAL	1000
353 	struct timer_list hw_check;
354 	/* check for UE every 1000ms */
355 #define BEISCSI_UE_DETECT_INTERVAL	1000
356 	u32 ue2rp;
357 	struct delayed_work recover_port;
358 	struct work_struct sess_work;
359 
360 	bool mac_addr_set;
361 	u8 mac_address[ETH_ALEN];
362 	u8 port_name;
363 	u8 port_speed;
364 	char fw_ver_str[BEISCSI_VER_STRLEN];
365 	struct workqueue_struct *wq;	/* The actuak work queue */
366 	struct be_ctrl_info ctrl;
367 	unsigned int generation;
368 	unsigned int interface_handle;
369 
370 	struct be_aic_obj aic_obj[MAX_CPUS];
371 	unsigned int attr_log_enable;
372 	int (*iotask_fn)(struct iscsi_task *,
373 			struct scatterlist *sg,
374 			uint32_t num_sg, uint32_t xferlen,
375 			uint32_t writedir);
376 	struct boot_struct {
377 		int retry;
378 		unsigned int tag;
379 		unsigned int s_handle;
380 		struct be_dma_mem nonemb_cmd;
381 		enum {
382 			BEISCSI_BOOT_REOPEN_SESS = 1,
383 			BEISCSI_BOOT_GET_SHANDLE,
384 			BEISCSI_BOOT_GET_SINFO,
385 			BEISCSI_BOOT_LOGOUT_SESS,
386 			BEISCSI_BOOT_CREATE_KSET,
387 		} action;
388 		struct mgmt_session_info boot_sess;
389 		struct iscsi_boot_kset *boot_kset;
390 	} boot_struct;
391 	struct work_struct boot_work;
392 };
393 
394 #define beiscsi_hba_in_error(phba) ((phba)->state & BEISCSI_HBA_IN_ERR)
395 #define beiscsi_hba_is_online(phba) \
396 	(!beiscsi_hba_in_error((phba)) && \
397 	 test_bit(BEISCSI_HBA_ONLINE, &phba->state))
398 
399 struct beiscsi_session {
400 	struct dma_pool *bhs_pool;
401 };
402 
403 /**
404  * struct beiscsi_conn - iscsi connection structure
405  */
406 struct beiscsi_conn {
407 	struct iscsi_conn *conn;
408 	struct beiscsi_hba *phba;
409 	u32 exp_statsn;
410 	u32 doorbell_offset;
411 	u32 beiscsi_conn_cid;
412 	struct beiscsi_endpoint *ep;
413 	unsigned short login_in_progress;
414 	struct wrb_handle *plogin_wrb_handle;
415 	struct sgl_handle *plogin_sgl_handle;
416 	struct beiscsi_session *beiscsi_sess;
417 	struct iscsi_task *task;
418 };
419 
420 /* This structure is used by the chip */
421 struct pdu_data_out {
422 	u32 dw[12];
423 };
424 /**
425  * Pseudo amap definition in which each bit of the actual structure is defined
426  * as a byte: used to calculate offset/shift/mask of each field
427  */
428 struct amap_pdu_data_out {
429 	u8 opcode[6];		/* opcode */
430 	u8 rsvd0[2];		/* should be 0 */
431 	u8 rsvd1[7];
432 	u8 final_bit;		/* F bit */
433 	u8 rsvd2[16];
434 	u8 ahs_length[8];	/* no AHS */
435 	u8 data_len_hi[8];
436 	u8 data_len_lo[16];	/* DataSegmentLength */
437 	u8 lun[64];
438 	u8 itt[32];		/* ITT; initiator task tag */
439 	u8 ttt[32];		/* TTT; valid for R2T or 0xffffffff */
440 	u8 rsvd3[32];
441 	u8 exp_stat_sn[32];
442 	u8 rsvd4[32];
443 	u8 data_sn[32];
444 	u8 buffer_offset[32];
445 	u8 rsvd5[32];
446 };
447 
448 struct be_cmd_bhs {
449 	struct iscsi_scsi_req iscsi_hdr;
450 	unsigned char pad1[16];
451 	struct pdu_data_out iscsi_data_pdu;
452 	unsigned char pad2[BE_SENSE_INFO_SIZE -
453 			sizeof(struct pdu_data_out)];
454 };
455 
456 struct beiscsi_io_task {
457 	struct wrb_handle *pwrb_handle;
458 	struct sgl_handle *psgl_handle;
459 	struct beiscsi_conn *conn;
460 	struct scsi_cmnd *scsi_cmnd;
461 	int num_sg;
462 	struct hwi_wrb_context *pwrb_context;
463 	itt_t libiscsi_itt;
464 	struct be_cmd_bhs *cmd_bhs;
465 	struct be_bus_address bhs_pa;
466 	unsigned short bhs_len;
467 	dma_addr_t mtask_addr;
468 	uint32_t mtask_data_count;
469 	uint8_t wrb_type;
470 };
471 
472 struct be_nonio_bhs {
473 	struct iscsi_hdr iscsi_hdr;
474 	unsigned char pad1[16];
475 	struct pdu_data_out iscsi_data_pdu;
476 	unsigned char pad2[BE_SENSE_INFO_SIZE -
477 			sizeof(struct pdu_data_out)];
478 };
479 
480 struct be_status_bhs {
481 	struct iscsi_scsi_req iscsi_hdr;
482 	unsigned char pad1[16];
483 	/**
484 	 * The plus 2 below is to hold the sense info length that gets
485 	 * DMA'ed by RxULP
486 	 */
487 	unsigned char sense_info[BE_SENSE_INFO_SIZE];
488 };
489 
490 struct iscsi_sge {
491 	u32 dw[4];
492 };
493 
494 /**
495  * Pseudo amap definition in which each bit of the actual structure is defined
496  * as a byte: used to calculate offset/shift/mask of each field
497  */
498 struct amap_iscsi_sge {
499 	u8 addr_hi[32];
500 	u8 addr_lo[32];
501 	u8 sge_offset[22];	/* DWORD 2 */
502 	u8 rsvd0[9];		/* DWORD 2 */
503 	u8 last_sge;		/* DWORD 2 */
504 	u8 len[17];		/* DWORD 3 */
505 	u8 rsvd1[15];		/* DWORD 3 */
506 };
507 
508 struct beiscsi_offload_params {
509 	u32 dw[6];
510 };
511 
512 #define OFFLD_PARAMS_ERL	0x00000003
513 #define OFFLD_PARAMS_DDE	0x00000004
514 #define OFFLD_PARAMS_HDE	0x00000008
515 #define OFFLD_PARAMS_IR2T	0x00000010
516 #define OFFLD_PARAMS_IMD	0x00000020
517 #define OFFLD_PARAMS_DATA_SEQ_INORDER   0x00000040
518 #define OFFLD_PARAMS_PDU_SEQ_INORDER    0x00000080
519 #define OFFLD_PARAMS_MAX_R2T 0x00FFFF00
520 
521 /**
522  * Pseudo amap definition in which each bit of the actual structure is defined
523  * as a byte: used to calculate offset/shift/mask of each field
524  */
525 struct amap_beiscsi_offload_params {
526 	u8 max_burst_length[32];
527 	u8 max_send_data_segment_length[32];
528 	u8 first_burst_length[32];
529 	u8 erl[2];
530 	u8 dde[1];
531 	u8 hde[1];
532 	u8 ir2t[1];
533 	u8 imd[1];
534 	u8 data_seq_inorder[1];
535 	u8 pdu_seq_inorder[1];
536 	u8 max_r2t[16];
537 	u8 pad[8];
538 	u8 exp_statsn[32];
539 	u8 max_recv_data_segment_length[32];
540 };
541 
542 struct hd_async_handle {
543 	struct list_head link;
544 	struct be_bus_address pa;
545 	void *pbuffer;
546 	u32 buffer_len;
547 	u16 index;
548 	u16 cri;
549 	u8 is_header;
550 	u8 is_final;
551 	u8 in_use;
552 };
553 
554 #define BEISCSI_ASYNC_HDQ_SIZE(phba, ulp) \
555 	(BEISCSI_GET_CID_COUNT((phba), (ulp)) * 2)
556 
557 /**
558  * This has list of async PDUs that are waiting to be processed.
559  * Buffers live in this list for a brief duration before they get
560  * processed and posted back to hardware.
561  * Note that we don't really need one cri_wait_queue per async_entry.
562  * We need one cri_wait_queue per CRI. Its easier to manage if this
563  * is tagged along with the async_entry.
564  */
565 struct hd_async_entry {
566 	struct cri_wait_queue {
567 		unsigned short hdr_len;
568 		unsigned int bytes_received;
569 		unsigned int bytes_needed;
570 		struct list_head list;
571 	} wq;
572 	/* handles posted to FW resides here */
573 	struct hd_async_handle *header;
574 	struct hd_async_handle *data;
575 };
576 
577 struct hd_async_buf_context {
578 	struct be_bus_address pa_base;
579 	void *va_base;
580 	void *ring_base;
581 	struct hd_async_handle *handle_base;
582 	u32 buffer_size;
583 	u16 pi;
584 };
585 
586 /**
587  * hd_async_context is declared for each ULP supporting iSCSI function.
588  */
589 struct hd_async_context {
590 	struct hd_async_buf_context async_header;
591 	struct hd_async_buf_context async_data;
592 	u16 num_entries;
593 	/**
594 	 * When unsol PDU is in, it needs to be chained till all the bytes are
595 	 * received and then processing is done. hd_async_entry is created
596 	 * based on the cid_count for each ULP. When unsol PDU comes in based
597 	 * on the conn_id it needs to be added to the correct async_entry wq.
598 	 * Below defined cid_to_async_cri_map is used to reterive the
599 	 * async_cri_map for a particular connection.
600 	 *
601 	 * This array is initialized after beiscsi_create_wrb_rings returns.
602 	 *
603 	 * - this method takes more memory space, fixed to 2K
604 	 * - any support for connections greater than this the array size needs
605 	 * to be incremented
606 	 */
607 #define BE_GET_ASYNC_CRI_FROM_CID(cid) (pasync_ctx->cid_to_async_cri_map[cid])
608 	unsigned short cid_to_async_cri_map[BE_MAX_SESSION];
609 	/**
610 	 * This is a variable size array. Don`t add anything after this field!!
611 	 */
612 	struct hd_async_entry *async_entry;
613 };
614 
615 struct i_t_dpdu_cqe {
616 	u32 dw[4];
617 } __packed;
618 
619 /**
620  * Pseudo amap definition in which each bit of the actual structure is defined
621  * as a byte: used to calculate offset/shift/mask of each field
622  */
623 struct amap_i_t_dpdu_cqe {
624 	u8 db_addr_hi[32];
625 	u8 db_addr_lo[32];
626 	u8 code[6];
627 	u8 cid[10];
628 	u8 dpl[16];
629 	u8 index[16];
630 	u8 num_cons[10];
631 	u8 rsvd0[4];
632 	u8 final;
633 	u8 valid;
634 } __packed;
635 
636 struct amap_i_t_dpdu_cqe_v2 {
637 	u8 db_addr_hi[32];  /* DWORD 0 */
638 	u8 db_addr_lo[32];  /* DWORD 1 */
639 	u8 code[6]; /* DWORD 2 */
640 	u8 num_cons; /* DWORD 2*/
641 	u8 rsvd0[8]; /* DWORD 2 */
642 	u8 dpl[17]; /* DWORD 2 */
643 	u8 index[16]; /* DWORD 3 */
644 	u8 cid[13]; /* DWORD 3 */
645 	u8 rsvd1; /* DWORD 3 */
646 	u8 final; /* DWORD 3 */
647 	u8 valid; /* DWORD 3 */
648 } __packed;
649 
650 #define CQE_VALID_MASK	0x80000000
651 #define CQE_CODE_MASK	0x0000003F
652 #define CQE_CID_MASK	0x0000FFC0
653 
654 #define EQE_VALID_MASK		0x00000001
655 #define EQE_MAJORCODE_MASK	0x0000000E
656 #define EQE_RESID_MASK		0xFFFF0000
657 
658 struct be_eq_entry {
659 	u32 dw[1];
660 } __packed;
661 
662 /**
663  * Pseudo amap definition in which each bit of the actual structure is defined
664  * as a byte: used to calculate offset/shift/mask of each field
665  */
666 struct amap_eq_entry {
667 	u8 valid;		/* DWORD 0 */
668 	u8 major_code[3];	/* DWORD 0 */
669 	u8 minor_code[12];	/* DWORD 0 */
670 	u8 resource_id[16];	/* DWORD 0 */
671 
672 } __packed;
673 
674 struct cq_db {
675 	u32 dw[1];
676 } __packed;
677 
678 /**
679  * Pseudo amap definition in which each bit of the actual structure is defined
680  * as a byte: used to calculate offset/shift/mask of each field
681  */
682 struct amap_cq_db {
683 	u8 qid[10];
684 	u8 event[1];
685 	u8 rsvd0[5];
686 	u8 num_popped[13];
687 	u8 rearm[1];
688 	u8 rsvd1[2];
689 } __packed;
690 
691 void beiscsi_process_eq(struct beiscsi_hba *phba);
692 
693 struct iscsi_wrb {
694 	u32 dw[16];
695 } __packed;
696 
697 #define WRB_TYPE_MASK 0xF0000000
698 #define SKH_WRB_TYPE_OFFSET 27
699 #define BE_WRB_TYPE_OFFSET  28
700 
701 #define ADAPTER_SET_WRB_TYPE(pwrb, wrb_type, type_offset) \
702 		(pwrb->dw[0] |= (wrb_type << type_offset))
703 
704 /**
705  * Pseudo amap definition in which each bit of the actual structure is defined
706  * as a byte: used to calculate offset/shift/mask of each field
707  */
708 struct amap_iscsi_wrb {
709 	u8 lun[14];		/* DWORD 0 */
710 	u8 lt;			/* DWORD 0 */
711 	u8 invld;		/* DWORD 0 */
712 	u8 wrb_idx[8];		/* DWORD 0 */
713 	u8 dsp;			/* DWORD 0 */
714 	u8 dmsg;		/* DWORD 0 */
715 	u8 undr_run;		/* DWORD 0 */
716 	u8 over_run;		/* DWORD 0 */
717 	u8 type[4];		/* DWORD 0 */
718 	u8 ptr2nextwrb[8];	/* DWORD 1 */
719 	u8 r2t_exp_dtl[24];	/* DWORD 1 */
720 	u8 sgl_icd_idx[12];	/* DWORD 2 */
721 	u8 rsvd0[20];		/* DWORD 2 */
722 	u8 exp_data_sn[32];	/* DWORD 3 */
723 	u8 iscsi_bhs_addr_hi[32];	/* DWORD 4 */
724 	u8 iscsi_bhs_addr_lo[32];	/* DWORD 5 */
725 	u8 cmdsn_itt[32];	/* DWORD 6 */
726 	u8 dif_ref_tag[32];	/* DWORD 7 */
727 	u8 sge0_addr_hi[32];	/* DWORD 8 */
728 	u8 sge0_addr_lo[32];	/* DWORD 9  */
729 	u8 sge0_offset[22];	/* DWORD 10 */
730 	u8 pbs;			/* DWORD 10 */
731 	u8 dif_mode[2];		/* DWORD 10 */
732 	u8 rsvd1[6];		/* DWORD 10 */
733 	u8 sge0_last;		/* DWORD 10 */
734 	u8 sge0_len[17];	/* DWORD 11 */
735 	u8 dif_meta_tag[14];	/* DWORD 11 */
736 	u8 sge0_in_ddr;		/* DWORD 11 */
737 	u8 sge1_addr_hi[32];	/* DWORD 12 */
738 	u8 sge1_addr_lo[32];	/* DWORD 13 */
739 	u8 sge1_r2t_offset[22];	/* DWORD 14 */
740 	u8 rsvd2[9];		/* DWORD 14 */
741 	u8 sge1_last;		/* DWORD 14 */
742 	u8 sge1_len[17];	/* DWORD 15 */
743 	u8 ref_sgl_icd_idx[12];	/* DWORD 15 */
744 	u8 rsvd3[2];		/* DWORD 15 */
745 	u8 sge1_in_ddr;		/* DWORD 15 */
746 
747 } __packed;
748 
749 struct amap_iscsi_wrb_v2 {
750 	u8 r2t_exp_dtl[25]; /* DWORD 0 */
751 	u8 rsvd0[2];    /* DWORD 0*/
752 	u8 type[5];     /* DWORD 0 */
753 	u8 ptr2nextwrb[8];  /* DWORD 1 */
754 	u8 wrb_idx[8];      /* DWORD 1 */
755 	u8 lun[16];     /* DWORD 1 */
756 	u8 sgl_idx[16]; /* DWORD 2 */
757 	u8 ref_sgl_icd_idx[16]; /* DWORD 2 */
758 	u8 exp_data_sn[32]; /* DWORD 3 */
759 	u8 iscsi_bhs_addr_hi[32];   /* DWORD 4 */
760 	u8 iscsi_bhs_addr_lo[32];   /* DWORD 5 */
761 	u8 cq_id[16];   /* DWORD 6 */
762 	u8 rsvd1[16];   /* DWORD 6 */
763 	u8 cmdsn_itt[32];   /* DWORD 7 */
764 	u8 sge0_addr_hi[32];    /* DWORD 8 */
765 	u8 sge0_addr_lo[32];    /* DWORD 9 */
766 	u8 sge0_offset[24]; /* DWORD 10 */
767 	u8 rsvd2[7];    /* DWORD 10 */
768 	u8 sge0_last;   /* DWORD 10 */
769 	u8 sge0_len[17];    /* DWORD 11 */
770 	u8 rsvd3[7];    /* DWORD 11 */
771 	u8 diff_enbl;   /* DWORD 11 */
772 	u8 u_run;       /* DWORD 11 */
773 	u8 o_run;       /* DWORD 11 */
774 	u8 invld;     /* DWORD 11 */
775 	u8 dsp;         /* DWORD 11 */
776 	u8 dmsg;        /* DWORD 11 */
777 	u8 rsvd4;       /* DWORD 11 */
778 	u8 lt;          /* DWORD 11 */
779 	u8 sge1_addr_hi[32];    /* DWORD 12 */
780 	u8 sge1_addr_lo[32];    /* DWORD 13 */
781 	u8 sge1_r2t_offset[24]; /* DWORD 14 */
782 	u8 rsvd5[7];    /* DWORD 14 */
783 	u8 sge1_last;   /* DWORD 14 */
784 	u8 sge1_len[17];    /* DWORD 15 */
785 	u8 rsvd6[15];   /* DWORD 15 */
786 } __packed;
787 
788 
789 struct wrb_handle *alloc_wrb_handle(struct beiscsi_hba *phba, unsigned int cid,
790 				     struct hwi_wrb_context **pcontext);
791 void
792 free_mgmt_sgl_handle(struct beiscsi_hba *phba, struct sgl_handle *psgl_handle);
793 
794 void beiscsi_free_mgmt_task_handles(struct beiscsi_conn *beiscsi_conn,
795 				     struct iscsi_task *task);
796 
797 void hwi_ring_cq_db(struct beiscsi_hba *phba,
798 		     unsigned int id, unsigned int num_processed,
799 		     unsigned char rearm);
800 
801 unsigned int beiscsi_process_cq(struct be_eq_obj *pbe_eq, int budget);
802 void beiscsi_process_mcc_cq(struct beiscsi_hba *phba);
803 
804 struct pdu_nop_out {
805 	u32 dw[12];
806 };
807 
808 /**
809  * Pseudo amap definition in which each bit of the actual structure is defined
810  * as a byte: used to calculate offset/shift/mask of each field
811  */
812 struct amap_pdu_nop_out {
813 	u8 opcode[6];		/* opcode 0x00 */
814 	u8 i_bit;		/* I Bit */
815 	u8 x_bit;		/* reserved; should be 0 */
816 	u8 fp_bit_filler1[7];
817 	u8 f_bit;		/* always 1 */
818 	u8 reserved1[16];
819 	u8 ahs_length[8];	/* no AHS */
820 	u8 data_len_hi[8];
821 	u8 data_len_lo[16];	/* DataSegmentLength */
822 	u8 lun[64];
823 	u8 itt[32];		/* initiator id for ping or 0xffffffff */
824 	u8 ttt[32];		/* target id for ping or 0xffffffff */
825 	u8 cmd_sn[32];
826 	u8 exp_stat_sn[32];
827 	u8 reserved5[128];
828 };
829 
830 #define PDUBASE_OPCODE_MASK	0x0000003F
831 #define PDUBASE_DATALENHI_MASK	0x0000FF00
832 #define PDUBASE_DATALENLO_MASK	0xFFFF0000
833 
834 struct pdu_base {
835 	u32 dw[16];
836 } __packed;
837 
838 /**
839  * Pseudo amap definition in which each bit of the actual structure is defined
840  * as a byte: used to calculate offset/shift/mask of each field
841  */
842 struct amap_pdu_base {
843 	u8 opcode[6];
844 	u8 i_bit;		/* immediate bit */
845 	u8 x_bit;		/* reserved, always 0 */
846 	u8 reserved1[24];	/* opcode-specific fields */
847 	u8 ahs_length[8];	/* length units is 4 byte words */
848 	u8 data_len_hi[8];
849 	u8 data_len_lo[16];	/* DatasegmentLength */
850 	u8 lun[64];		/* lun or opcode-specific fields */
851 	u8 itt[32];		/* initiator task tag */
852 	u8 reserved4[224];
853 };
854 
855 struct iscsi_target_context_update_wrb {
856 	u32 dw[16];
857 } __packed;
858 
859 /**
860  * Pseudo amap definition in which each bit of the actual structure is defined
861  * as a byte: used to calculate offset/shift/mask of each field
862  */
863 #define BE_TGT_CTX_UPDT_CMD 0x07
864 struct amap_iscsi_target_context_update_wrb {
865 	u8 lun[14];		/* DWORD 0 */
866 	u8 lt;			/* DWORD 0 */
867 	u8 invld;		/* DWORD 0 */
868 	u8 wrb_idx[8];		/* DWORD 0 */
869 	u8 dsp;			/* DWORD 0 */
870 	u8 dmsg;		/* DWORD 0 */
871 	u8 undr_run;		/* DWORD 0 */
872 	u8 over_run;		/* DWORD 0 */
873 	u8 type[4];		/* DWORD 0 */
874 	u8 ptr2nextwrb[8];	/* DWORD 1 */
875 	u8 max_burst_length[19];	/* DWORD 1 */
876 	u8 rsvd0[5];		/* DWORD 1 */
877 	u8 rsvd1[15];		/* DWORD 2 */
878 	u8 max_send_data_segment_length[17];	/* DWORD 2 */
879 	u8 first_burst_length[14];	/* DWORD 3 */
880 	u8 rsvd2[2];		/* DWORD 3 */
881 	u8 tx_wrbindex_drv_msg[8];	/* DWORD 3 */
882 	u8 rsvd3[5];		/* DWORD 3 */
883 	u8 session_state[3];	/* DWORD 3 */
884 	u8 rsvd4[16];		/* DWORD 4 */
885 	u8 tx_jumbo;		/* DWORD 4 */
886 	u8 hde;			/* DWORD 4 */
887 	u8 dde;			/* DWORD 4 */
888 	u8 erl[2];		/* DWORD 4 */
889 	u8 domain_id[5];		/* DWORD 4 */
890 	u8 mode;		/* DWORD 4 */
891 	u8 imd;			/* DWORD 4 */
892 	u8 ir2t;		/* DWORD 4 */
893 	u8 notpredblq[2];	/* DWORD 4 */
894 	u8 compltonack;		/* DWORD 4 */
895 	u8 stat_sn[32];		/* DWORD 5 */
896 	u8 pad_buffer_addr_hi[32];	/* DWORD 6 */
897 	u8 pad_buffer_addr_lo[32];	/* DWORD 7 */
898 	u8 pad_addr_hi[32];	/* DWORD 8 */
899 	u8 pad_addr_lo[32];	/* DWORD 9 */
900 	u8 rsvd5[32];		/* DWORD 10 */
901 	u8 rsvd6[32];		/* DWORD 11 */
902 	u8 rsvd7[32];		/* DWORD 12 */
903 	u8 rsvd8[32];		/* DWORD 13 */
904 	u8 rsvd9[32];		/* DWORD 14 */
905 	u8 rsvd10[32];		/* DWORD 15 */
906 
907 } __packed;
908 
909 #define BEISCSI_MAX_RECV_DATASEG_LEN    (64 * 1024)
910 #define BEISCSI_MAX_CXNS    1
911 struct amap_iscsi_target_context_update_wrb_v2 {
912 	u8 max_burst_length[24];    /* DWORD 0 */
913 	u8 rsvd0[3];    /* DWORD 0 */
914 	u8 type[5];     /* DWORD 0 */
915 	u8 ptr2nextwrb[8];  /* DWORD 1 */
916 	u8 wrb_idx[8];      /* DWORD 1 */
917 	u8 rsvd1[16];       /* DWORD 1 */
918 	u8 max_send_data_segment_length[24];    /* DWORD 2 */
919 	u8 rsvd2[8];    /* DWORD 2 */
920 	u8 first_burst_length[24]; /* DWORD 3 */
921 	u8 rsvd3[8]; /* DOWRD 3 */
922 	u8 max_r2t[16]; /* DWORD 4 */
923 	u8 rsvd4;       /* DWORD 4 */
924 	u8 hde;         /* DWORD 4 */
925 	u8 dde;         /* DWORD 4 */
926 	u8 erl[2];      /* DWORD 4 */
927 	u8 rsvd5[6];    /* DWORD 4 */
928 	u8 imd;         /* DWORD 4 */
929 	u8 ir2t;        /* DWORD 4 */
930 	u8 rsvd6[3];    /* DWORD 4 */
931 	u8 stat_sn[32];     /* DWORD 5 */
932 	u8 rsvd7[32];   /* DWORD 6 */
933 	u8 rsvd8[32];   /* DWORD 7 */
934 	u8 max_recv_dataseg_len[24];    /* DWORD 8 */
935 	u8 rsvd9[8]; /* DWORD 8 */
936 	u8 rsvd10[32];   /* DWORD 9 */
937 	u8 rsvd11[32];   /* DWORD 10 */
938 	u8 max_cxns[16]; /* DWORD 11 */
939 	u8 rsvd12[11]; /* DWORD  11*/
940 	u8 invld; /* DWORD 11 */
941 	u8 rsvd13;/* DWORD 11*/
942 	u8 dmsg; /* DWORD 11 */
943 	u8 data_seq_inorder; /* DWORD 11 */
944 	u8 pdu_seq_inorder; /* DWORD 11 */
945 	u8 rsvd14[32]; /*DWORD 12 */
946 	u8 rsvd15[32]; /* DWORD 13 */
947 	u8 rsvd16[32]; /* DWORD 14 */
948 	u8 rsvd17[32]; /* DWORD 15 */
949 } __packed;
950 
951 
952 struct be_ring {
953 	u32 pages;		/* queue size in pages */
954 	u32 id;			/* queue id assigned by beklib */
955 	u32 num;		/* number of elements in queue */
956 	u32 cidx;		/* consumer index */
957 	u32 pidx;		/* producer index -- not used by most rings */
958 	u32 item_size;		/* size in bytes of one object */
959 	u8 ulp_num;	/* ULP to which CID binded */
960 	u16 register_set;
961 	u16 doorbell_format;
962 	u32 doorbell_offset;
963 
964 	void *va;		/* The virtual address of the ring.  This
965 				 * should be last to allow 32 & 64 bit debugger
966 				 * extensions to work.
967 				 */
968 };
969 
970 struct hwi_controller {
971 	struct hwi_wrb_context *wrb_context;
972 	struct be_ring default_pdu_hdr[BEISCSI_ULP_COUNT];
973 	struct be_ring default_pdu_data[BEISCSI_ULP_COUNT];
974 	struct hwi_context_memory *phwi_ctxt;
975 };
976 
977 enum hwh_type_enum {
978 	HWH_TYPE_IO = 1,
979 	HWH_TYPE_LOGOUT = 2,
980 	HWH_TYPE_TMF = 3,
981 	HWH_TYPE_NOP = 4,
982 	HWH_TYPE_IO_RD = 5,
983 	HWH_TYPE_LOGIN = 11,
984 	HWH_TYPE_INVALID = 0xFFFFFFFF
985 };
986 
987 struct wrb_handle {
988 	unsigned short wrb_index;
989 	struct iscsi_task *pio_handle;
990 	struct iscsi_wrb *pwrb;
991 };
992 
993 struct hwi_context_memory {
994 	struct be_eq_obj be_eq[MAX_CPUS];
995 	struct be_queue_info be_cq[MAX_CPUS - 1];
996 
997 	struct be_queue_info *be_wrbq;
998 	/**
999 	 * Create array of ULP number for below entries as DEFQ
1000 	 * will be created for both ULP if iSCSI Protocol is
1001 	 * loaded on both ULP.
1002 	 */
1003 	struct be_queue_info be_def_hdrq[BEISCSI_ULP_COUNT];
1004 	struct be_queue_info be_def_dataq[BEISCSI_ULP_COUNT];
1005 	struct hd_async_context *pasync_ctx[BEISCSI_ULP_COUNT];
1006 };
1007 
1008 void beiscsi_start_boot_work(struct beiscsi_hba *phba, unsigned int s_handle);
1009 
1010 /* Logging related definitions */
1011 #define BEISCSI_LOG_INIT	0x0001	/* Initialization events */
1012 #define BEISCSI_LOG_MBOX	0x0002	/* Mailbox Events */
1013 #define BEISCSI_LOG_MISC	0x0004	/* Miscllaneous Events */
1014 #define BEISCSI_LOG_EH		0x0008	/* Error Handler */
1015 #define BEISCSI_LOG_IO		0x0010	/* IO Code Path */
1016 #define BEISCSI_LOG_CONFIG	0x0020	/* CONFIG Code Path */
1017 #define BEISCSI_LOG_ISCSI	0x0040	/* SCSI/iSCSI Protocol related Logs */
1018 
1019 #define __beiscsi_log(phba, level, fmt, arg...) \
1020 	shost_printk(level, phba->shost, fmt, __LINE__, ##arg)
1021 
1022 #define beiscsi_log(phba, level, mask, fmt, arg...) \
1023 do { \
1024 	uint32_t log_value = phba->attr_log_enable; \
1025 		if (((mask) & log_value) || (level[1] <= '3')) \
1026 			__beiscsi_log(phba, level, fmt, ##arg); \
1027 } while (0);
1028 
1029 #endif
1030