Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |