1 #ifndef __CARD_DDCB_H__
2 #define __CARD_DDCB_H__
5 * IBM Accelerator Family 'GenWQE'
7 * (C) Copyright IBM Corp. 2013
9 * Author: Frank Haverkamp <haver@linux.vnet.ibm.com>
10 * Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com>
11 * Author: Michael Jung <mijung@de.ibm.com>
12 * Author: Michael Ruettger <michael@ibmra.de>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
25 #include <linux/types.h>
26 #include <asm/byteorder.h>
28 #include "genwqe_driver.h"
29 #include "card_base.h"
32 * struct ddcb - Device Driver Control Block DDCB
33 * @hsi: Hardware software interlock
34 * @shi: Software hardware interlock. Hsi and shi are used to interlock
35 * software and hardware activities. We are using a compare and
36 * swap operation to ensure that there are no races when
37 * activating new DDCBs on the queue, or when we need to
38 * purge a DDCB from a running queue.
39 * @acfunc: Accelerator function addresses a unit within the chip
40 * @cmd: Command to work on
41 * @cmdopts_16: Options for the command
45 * The DDCB data format is big endian. Multiple consequtive DDBCs form
48 #define ASIV_LENGTH 104 /* Old specification without ATS field */
49 #define ASIV_LENGTH_ATS 96 /* New specification with ATS field */
54 __be32 icrc_hsi_shi_32; /* iCRC, Hardware/SW interlock */
61 u8 pre; /* Preamble */
62 u8 xdir; /* Execution Directives */
63 __be16 seqnum_16; /* Sequence Number */
65 u8 acfunc; /* Accelerator Function.. */
66 u8 cmd; /* Command. */
67 __be16 cmdopts_16; /* Command Options */
68 u8 sur; /* Status Update Rate */
69 u8 psp; /* Protection Section Pointer */
70 __be16 rsvd_0e_16; /* Reserved invariant */
72 __be64 fwiv_64; /* Firmware Invariant. */
76 __be64 ats_64; /* Address Translation Spec */
77 u8 asiv[ASIV_LENGTH_ATS]; /* New ASIV */
79 u8 __asiv[ASIV_LENGTH]; /* obsolete */
81 u8 asv[ASV_LENGTH]; /* Appl Spec Variant */
83 __be16 rsvd_c0_16; /* Reserved Variant */
84 __be16 vcrc_16; /* Variant CRC */
85 __be32 rsvd_32; /* Reserved unprotected */
87 __be64 deque_ts_64; /* Deque Time Stamp. */
89 __be16 retc_16; /* Return Code */
90 __be16 attn_16; /* Attention/Extended Error Codes */
91 __be32 progress_32; /* Progress indicator. */
93 __be64 cmplt_ts_64; /* Completion Time Stamp. */
95 /* The following layout matches the new service layer format */
96 __be32 ibdc_32; /* Inbound Data Count (* 256) */
97 __be32 obdc_32; /* Outbound Data Count (* 256) */
99 __be64 rsvd_SLH_64; /* Reserved for hardware */
100 union { /* private data for driver */
104 __be64 disp_ts_64; /* Dispatch TimeStamp */
105 } __attribute__((__packed__));
107 /* CRC polynomials for DDCB */
108 #define CRC16_POLYNOMIAL 0x1021
111 * SHI: Software to Hardware Interlock
112 * This 1 byte field is written by software to interlock the
113 * movement of one queue entry to another with the hardware in the
116 #define DDCB_SHI_INTR 0x04 /* Bit 2 */
117 #define DDCB_SHI_PURGE 0x02 /* Bit 1 */
118 #define DDCB_SHI_NEXT 0x01 /* Bit 0 */
121 * HSI: Hardware to Software interlock
122 * This 1 byte field is written by hardware to interlock the movement
123 * of one queue entry to another with the software in the chip.
125 #define DDCB_HSI_COMPLETED 0x40 /* Bit 6 */
126 #define DDCB_HSI_FETCHED 0x04 /* Bit 2 */
129 * Accessing HSI/SHI is done 32-bit wide
130 * Normally 16-bit access would work too, but on some platforms the
131 * 16 compare and swap operation is not supported. Therefore
132 * switching to 32-bit such that those platforms will work too.
136 #define DDCB_INTR_BE32 cpu_to_be32(0x00000004)
137 #define DDCB_PURGE_BE32 cpu_to_be32(0x00000002)
138 #define DDCB_NEXT_BE32 cpu_to_be32(0x00000001)
139 #define DDCB_COMPLETED_BE32 cpu_to_be32(0x00004000)
140 #define DDCB_FETCHED_BE32 cpu_to_be32(0x00000400)
142 /* Definitions of DDCB presets */
143 #define DDCB_PRESET_PRE 0x80
144 #define ICRC_LENGTH(n) ((n) + 8 + 8 + 8) /* used ASIV + hdr fields */
145 #define VCRC_LENGTH(n) ((n)) /* used ASV */
148 * Genwqe Scatter Gather list
149 * Each element has up to 8 entries.
150 * The chaining element is element 0 cause of prefetching needs.
154 * 0b0110 Chained descriptor. The descriptor is describing the next
157 #define SG_CHAINED (0x6)
160 * 0b0010 First entry of a descriptor list. Start from a Buffer-Empty
163 #define SG_DATA (0x2)
166 * 0b0000 Early terminator. This is the last entry on the list
167 * irregardless of the length indicated.
169 #define SG_END_LIST (0x0)
172 * struct sglist - Scatter gather list
173 * @target_addr: Either a dma addr of memory to work on or a
174 * dma addr or a subsequent sglist block.
175 * @len: Length of the data block.
178 * Depending on the command the GenWQE card can use a scatter gather
179 * list to describe the memory it works on. Always 8 sg_entry's form
188 #endif /* __CARD_DDCB_H__ */