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 = 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