1 /*
2 * Adaptec AAC series RAID controller driver
3 * (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
4 *
5 * based on the old aacraid driver that is..
6 * Adaptec aacraid device driver for Linux.
7 *
8 * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; see the file COPYING. If not, write to
22 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 *
24 * Module Name:
25 * comminit.c
26 *
27 * Abstract: This supports the initialization of the host adapter commuication interface.
28 * This is a platform dependent module for the pci cyclone board.
29 *
30 */
31
32 #include <linux/kernel.h>
33 #include <linux/init.h>
34 #include <linux/types.h>
35 #include <linux/sched.h>
36 #include <linux/pci.h>
37 #include <linux/spinlock.h>
38 #include <linux/slab.h>
39 #include <linux/blkdev.h>
40 #include <linux/completion.h>
41 #include <linux/mm.h>
42 #include <asm/semaphore.h>
43
44 #include "aacraid.h"
45
46 struct aac_common aac_config;
47
48 static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long commsize, unsigned long commalign)
49 {
50 unsigned char *base;
51 unsigned long size, align;
52 unsigned long fibsize = 4096;
53 unsigned long printfbufsiz = 256;
54 struct aac_init *init;
55 dma_addr_t phys;
56
57 size = fibsize + sizeof(struct aac_init) + commsize + commalign + printfbufsiz;
58
59
60 base = pci_alloc_consistent(dev->pdev, size, &phys);
61
62 if(base == NULL)
63 {
64 printk(KERN_ERR "aacraid: unable to create mapping.\n");
65 return 0;
66 }
67 dev->comm_addr = (void *)base;
68 dev->comm_phys = phys;
69 dev->comm_size = size;
70
71 dev->init = (struct aac_init *)(base + fibsize);
72 dev->init_pa = phys + fibsize;
73
74 init = dev->init;
75
76 init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
77 init->MiniPortRevision = cpu_to_le32(Sa_MINIPORT_REVISION);
78 init->fsrev = cpu_to_le32(dev->fsrev);
79
80 /*
81 * Adapter Fibs are the first thing allocated so that they
82 * start page aligned
83 */
84 dev->aif_base_va = (struct hw_fib *)base;
85
86 init->AdapterFibsVirtualAddress = cpu_to_le32(0);
87 init->AdapterFibsPhysicalAddress = cpu_to_le32((u32)phys);
88 init->AdapterFibsSize = cpu_to_le32(fibsize);
89 init->AdapterFibAlign = cpu_to_le32(sizeof(struct hw_fib));
90 /*
91 * number of 4k pages of host physical memory. The aacraid fw needs
92 * this number to be less than 4gb worth of pages. num_physpages is in
93 * system page units. New firmware doesn't have any issues with the
94 * mapping system, but older Firmware did, and had *troubles* dealing
95 * with the math overloading past 32 bits, thus we must limit this
96 * field.
97 *
98 * This assumes the memory is mapped zero->n, which isnt
99 * always true on real computers. It also has some slight problems
100 * with the GART on x86-64. I've btw never tried DMA from PCI space
101 * on this platform but don't be suprised if its problematic.
102 */
103 #ifndef CONFIG_GART_IOMMU
104 if ((num_physpages << (PAGE_SHIFT - 12)) <= AAC_MAX_HOSTPHYSMEMPAGES) {
105 init->HostPhysMemPages =
106 cpu_to_le32(num_physpages << (PAGE_SHIFT-12));
107 } else
108 #endif
109 {
110 init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
111 }
112
113
114 /*
115 * Increment the base address by the amount already used
116 */
117 base = base + fibsize + sizeof(struct aac_init);
118 phys = (dma_addr_t)((ulong)phys + fibsize + sizeof(struct aac_init));
119 /*
120 * Align the beginning of Headers to commalign
121 */
122 align = (commalign - ((unsigned long)(base) & (commalign - 1)));
123 base = base + align;
124 phys = phys + align;
125 /*
126 * Fill in addresses of the Comm Area Headers and Queues
127 */
128 *commaddr = base;
129 init->CommHeaderAddress = cpu_to_le32((u32)phys);
130 /*
131 * Increment the base address by the size of the CommArea
132 */
133 base = base + commsize;
134 phys = phys + commsize;
135 /*
136 * Place the Printf buffer area after the Fast I/O comm area.
137 */
138 dev->printfbuf = (void *)base;
139 init->printfbuf = cpu_to_le32(phys);
140 init->printfbufsiz = cpu_to_le32(printfbufsiz);
141 memset(base, 0, printfbufsiz);
142 return 1;
143 }
144
145 static void aac_queue_init(struct aac_dev * dev, struct aac_queue * q, u32 *mem, int qsize)
146 {
147 q->numpending = 0;
148 q->dev = dev;
149 INIT_LIST_HEAD(&q->pendingq);
150 init_waitqueue_head(&q->cmdready);
151 INIT_LIST_HEAD(&q->cmdq);
152 init_waitqueue_head(&q->qfull);
153 spin_lock_init(&q->lockdata);
154 q->lock = &q->lockdata;
155 q->headers.producer = mem;
156 q->headers.consumer = mem+1;
157 *(q->headers.producer) = cpu_to_le32(qsize);
158 *(q->headers.consumer) = cpu_to_le32(qsize);
159 q->entries = qsize;
160 }
161
162 /**
163 * aac_send_shutdown - shutdown an adapter
164 * @dev: Adapter to shutdown
165 *
166 * This routine will send a VM_CloseAll (shutdown) request to the adapter.
167 */
168
169 int aac_send_shutdown(struct aac_dev * dev)
170 {
171 struct fib * fibctx;
172 struct aac_close *cmd;
173 int status;
174
175 fibctx = fib_alloc(dev);
176 fib_init(fibctx);
177
178 cmd = (struct aac_close *) fib_data(fibctx);
179
180 cmd->command = cpu_to_le32(VM_CloseAll);
181 cmd->cid = cpu_to_le32(0xffffffff);
182
183 status = fib_send(ContainerCommand,
184 fibctx,
185 sizeof(struct aac_close),
186 FsaNormal,
187 1, 1,
188 NULL, NULL);
189
190 if (status == 0)
191 fib_complete(fibctx);
192 fib_free(fibctx);
193 return status;
194 }
195
196 /**
197 * aac_comm_init - Initialise FSA data structures
198 * @dev: Adapter to initialise
199 *
200 * Initializes the data structures that are required for the FSA commuication
201 * interface to operate.
202 * Returns
203 * 1 - if we were able to init the commuication interface.
204 * 0 - If there were errors initing. This is a fatal error.
205 */
206
207 int aac_comm_init(struct aac_dev * dev)
208 {
209 unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
210 unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
211 u32 *headers;
212 struct aac_entry * queues;
213 unsigned long size;
214 struct aac_queue_block * comm = dev->queues;
215 /*
216 * Now allocate and initialize the zone structures used as our
217 * pool of FIB context records. The size of the zone is based
218 * on the system memory size. We also initialize the mutex used
219 * to protect the zone.
220 */
221 spin_lock_init(&dev->fib_lock);
222
223 /*
224 * Allocate the physically contigous space for the commuication
225 * queue headers.
226 */
227
228 size = hdrsize + queuesize;
229
230 if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
231 return -ENOMEM;
232
233 queues = (struct aac_entry *)(((ulong)headers) + hdrsize);
234
235 /* Adapter to Host normal priority Command queue */
236 comm->queue[HostNormCmdQueue].base = queues;
237 aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
238 queues += HOST_NORM_CMD_ENTRIES;
239 headers += 2;
240
241 /* Adapter to Host high priority command queue */
242 comm->queue[HostHighCmdQueue].base = queues;
243 aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
244
245 queues += HOST_HIGH_CMD_ENTRIES;
246 headers +=2;
247
248 /* Host to adapter normal priority command queue */
249 comm->queue[AdapNormCmdQueue].base = queues;
250 aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
251
252 queues += ADAP_NORM_CMD_ENTRIES;
253 headers += 2;
254
255 /* host to adapter high priority command queue */
256 comm->queue[AdapHighCmdQueue].base = queues;
257 aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
258
259 queues += ADAP_HIGH_CMD_ENTRIES;
260 headers += 2;
261
262 /* adapter to host normal priority response queue */
263 comm->queue[HostNormRespQueue].base = queues;
264 aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
265 queues += HOST_NORM_RESP_ENTRIES;
266 headers += 2;
267
268 /* adapter to host high priority response queue */
269 comm->queue[HostHighRespQueue].base = queues;
270 aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
271
272 queues += HOST_HIGH_RESP_ENTRIES;
273 headers += 2;
274
275 /* host to adapter normal priority response queue */
276 comm->queue[AdapNormRespQueue].base = queues;
277 aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);
278
279 queues += ADAP_NORM_RESP_ENTRIES;
280 headers += 2;
281
282 /* host to adapter high priority response queue */
283 comm->queue[AdapHighRespQueue].base = queues;
284 aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);
285
286 comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
287 comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
288 comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
289 comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;
290
291 return 0;
292 }
293
294 struct aac_dev *aac_init_adapter(struct aac_dev *dev)
295 {
296 /*
297 * Ok now init the communication subsystem
298 */
299
300 dev->queues = (struct aac_queue_block *) kmalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
301 if (dev->queues == NULL) {
302 printk(KERN_ERR "Error could not allocate comm region.\n");
303 return NULL;
304 }
305 memset(dev->queues, 0, sizeof(struct aac_queue_block));
306
307 if (aac_comm_init(dev)<0){
308 kfree(dev->queues);
309 return NULL;
310 }
311 /*
312 * Initialize the list of fibs
313 */
314 if(fib_setup(dev)<0){
315 kfree(dev->queues);
316 return NULL;
317 }
318
319 INIT_LIST_HEAD(&dev->fib_list);
320 init_completion(&dev->aif_completion);
321
322 return dev;
323 }
324
325
326
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