2 * linux/drivers/char/hpilo.h
4 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
5 * David Altobelli <david.altobelli@hp.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
14 #define ILO_NAME "hpilo"
16 /* max number of open channel control blocks per device, hw limited to 32 */
18 /* max number of supported devices */
20 /* max number of files */
21 #define MAX_OPEN (MAX_CCB * MAX_ILO_DEV)
22 /* spin counter for open/close delay */
23 #define MAX_WAIT 10000
26 * Per device, used to track global memory allocations.
29 /* mmio registers on device */
30 char __iomem *mmio_vaddr;
32 /* doorbell registers on device */
33 char __iomem *db_vaddr;
35 /* shared memory on device used for channel control blocks */
36 char __iomem *ram_vaddr;
38 /* files corresponding to this device */
39 struct ccb_data *ccb_alloc[MAX_CCB];
41 struct pci_dev *ilo_dev;
43 spinlock_t alloc_lock;
49 /* offset from mmio_vaddr */
51 /* DB_OUT reset bit */
55 * Channel control block. Used to manage hardware queues.
56 * The format must match hw's version. The hw ccb is 128 bytes,
57 * but the context area shouldn't be touched by the driver.
59 #define ILOSW_CCB_SZ 64
60 #define ILOHW_CCB_SZ 128
83 char __iomem *db_base;
89 /* unused context area (64 bytes) */
92 /* ccb queue parameters */
96 #define L2_QENTRY_SZ 12
98 /* ccb ctrl bitfields */
99 #define CTRL_BITPOS_L2SZ 0
100 #define CTRL_BITPOS_FIFOINDEXMASK 4
101 #define CTRL_BITPOS_DESCLIMIT 18
102 #define CTRL_BITPOS_A 30
103 #define CTRL_BITPOS_G 31
105 /* ccb doorbell macros */
106 #define L2_DB_SIZE 14
107 #define ONE_DB_SIZE (1 << L2_DB_SIZE)
110 * Per fd structure used to track the ccb allocated to that dev file.
113 /* software version of ccb, using virtual addrs */
114 struct ccb driver_ccb;
116 /* hardware version of ccb, using physical addrs */
119 /* hardware ccb is written to this shared mapped device memory */
120 struct ccb __iomem *mapped_ccb;
122 /* dma'able memory used for send/recv queues */
127 /* pointer to hardware device info */
128 struct ilo_hwinfo *ilo_hw;
130 /* usage count, to allow for shared ccb's */
133 /* open wanted exclusive access to this ccb */
138 * FIFO queue structure, shared with hw.
140 #define ILO_START_ALIGN 4096
141 #define ILO_CACHE_SZ 128
143 u64 nrents; /* user requested number of fifo entries */
144 u64 imask; /* mask to extract valid fifo index */
145 u64 merge; /* O/C bits to merge in during enqueue operation */
146 u64 reset; /* set to non-zero when the target device resets */
147 u8 pad_0[ILO_CACHE_SZ - (sizeof(u64) * 4)];
150 u8 pad_1[ILO_CACHE_SZ - (sizeof(u64))];
153 u8 pad_2[ILO_CACHE_SZ - (sizeof(u64))];
158 /* convert between struct fifo, and the fifobar, which is saved in the ccb */
159 #define FIFOHANDLESIZE (sizeof(struct fifo) - sizeof(u64))
160 #define FIFOBARTOHANDLE(_fifo) \
161 ((struct fifo *)(((char *)(_fifo)) - FIFOHANDLESIZE))
163 /* the number of qwords to consume from the entry descriptor */
164 #define ENTRY_BITPOS_QWORDS 0
165 /* descriptor index number (within a specified queue) */
166 #define ENTRY_BITPOS_DESCRIPTOR 10
167 /* state bit, fifo entry consumed by consumer */
168 #define ENTRY_BITPOS_C 22
169 /* state bit, fifo entry is occupied */
170 #define ENTRY_BITPOS_O 23
172 #define ENTRY_BITS_QWORDS 10
173 #define ENTRY_BITS_DESCRIPTOR 12
174 #define ENTRY_BITS_C 1
175 #define ENTRY_BITS_O 1
176 #define ENTRY_BITS_TOTAL \
177 (ENTRY_BITS_C + ENTRY_BITS_O + \
178 ENTRY_BITS_QWORDS + ENTRY_BITS_DESCRIPTOR)
180 /* extract various entry fields */
181 #define ENTRY_MASK ((1 << ENTRY_BITS_TOTAL) - 1)
182 #define ENTRY_MASK_C (((1 << ENTRY_BITS_C) - 1) << ENTRY_BITPOS_C)
183 #define ENTRY_MASK_O (((1 << ENTRY_BITS_O) - 1) << ENTRY_BITPOS_O)
184 #define ENTRY_MASK_QWORDS \
185 (((1 << ENTRY_BITS_QWORDS) - 1) << ENTRY_BITPOS_QWORDS)
186 #define ENTRY_MASK_DESCRIPTOR \
187 (((1 << ENTRY_BITS_DESCRIPTOR) - 1) << ENTRY_BITPOS_DESCRIPTOR)
189 #define ENTRY_MASK_NOSTATE (ENTRY_MASK >> (ENTRY_BITS_C + ENTRY_BITS_O))
191 #endif /* __HPILO_H */