| 1 | /*- |
| 2 | * Driver for Hifn HIPP-I/II chipset |
| 3 | * Copyright (c) 2006 Michael Richardson <mcr@xelerance.com> |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | * |
| 28 | * Effort sponsored by Hifn Inc. |
| 29 | * |
| 30 | */ |
| 31 | |
| 32 | /* |
| 33 | * Driver for various Hifn encryption processors. |
| 34 | */ |
| 35 | #include <linux/version.h> |
| 36 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38) && !defined(AUTOCONF_INCLUDED) |
| 37 | #include <linux/config.h> |
| 38 | #endif |
| 39 | #include <linux/module.h> |
| 40 | #include <linux/init.h> |
| 41 | #include <linux/list.h> |
| 42 | #include <linux/slab.h> |
| 43 | #include <linux/wait.h> |
| 44 | #include <linux/sched.h> |
| 45 | #include <linux/pci.h> |
| 46 | #include <linux/delay.h> |
| 47 | #include <linux/interrupt.h> |
| 48 | #include <linux/spinlock.h> |
| 49 | #include <linux/random.h> |
| 50 | #include <linux/skbuff.h> |
| 51 | #include <linux/uio.h> |
| 52 | #include <linux/sysfs.h> |
| 53 | #include <linux/miscdevice.h> |
| 54 | #include <asm/io.h> |
| 55 | |
| 56 | #include <cryptodev.h> |
| 57 | |
| 58 | #include "hifnHIPPreg.h" |
| 59 | #include "hifnHIPPvar.h" |
| 60 | |
| 61 | #if 1 |
| 62 | #define DPRINTF(a...) if (hipp_debug) { \ |
| 63 | printk("%s: ", sc ? \ |
| 64 | device_get_nameunit(sc->sc_dev) : "hifn"); \ |
| 65 | printk(a); \ |
| 66 | } else |
| 67 | #else |
| 68 | #define DPRINTF(a...) |
| 69 | #endif |
| 70 | |
| 71 | typedef int bus_size_t; |
| 72 | |
| 73 | static inline int |
| 74 | pci_get_revid(struct pci_dev *dev) |
| 75 | { |
| 76 | u8 rid = 0; |
| 77 | pci_read_config_byte(dev, PCI_REVISION_ID, &rid); |
| 78 | return rid; |
| 79 | } |
| 80 | |
| 81 | #define debug hipp_debug |
| 82 | int hipp_debug = 0; |
| 83 | module_param(hipp_debug, int, 0644); |
| 84 | MODULE_PARM_DESC(hipp_debug, "Enable debug"); |
| 85 | |
| 86 | int hipp_maxbatch = 1; |
| 87 | module_param(hipp_maxbatch, int, 0644); |
| 88 | MODULE_PARM_DESC(hipp_maxbatch, "max ops to batch w/o interrupt"); |
| 89 | |
| 90 | static int hipp_probe(struct pci_dev *dev, const struct pci_device_id *ent); |
| 91 | static void hipp_remove(struct pci_dev *dev); |
| 92 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19) |
| 93 | static irqreturn_t hipp_intr(int irq, void *arg); |
| 94 | #else |
| 95 | static irqreturn_t hipp_intr(int irq, void *arg, struct pt_regs *regs); |
| 96 | #endif |
| 97 | |
| 98 | static int hipp_num_chips = 0; |
| 99 | static struct hipp_softc *hipp_chip_idx[HIPP_MAX_CHIPS]; |
| 100 | |
| 101 | static int hipp_newsession(device_t, u_int32_t *, struct cryptoini *); |
| 102 | static int hipp_freesession(device_t, u_int64_t); |
| 103 | static int hipp_process(device_t, struct cryptop *, int); |
| 104 | |
| 105 | static device_method_t hipp_methods = { |
| 106 | /* crypto device methods */ |
| 107 | DEVMETHOD(cryptodev_newsession, hipp_newsession), |
| 108 | DEVMETHOD(cryptodev_freesession,hipp_freesession), |
| 109 | DEVMETHOD(cryptodev_process, hipp_process), |
| 110 | }; |
| 111 | |
| 112 | static __inline u_int32_t |
| 113 | READ_REG(struct hipp_softc *sc, unsigned int barno, bus_size_t reg) |
| 114 | { |
| 115 | u_int32_t v = readl(sc->sc_bar[barno] + reg); |
| 116 | //sc->sc_bar0_lastreg = (bus_size_t) -1; |
| 117 | return (v); |
| 118 | } |
| 119 | static __inline void |
| 120 | WRITE_REG(struct hipp_softc *sc, unsigned int barno, bus_size_t reg, u_int32_t val) |
| 121 | { |
| 122 | writel(val, sc->sc_bar[barno] + reg); |
| 123 | } |
| 124 | |
| 125 | #define READ_REG_0(sc, reg) READ_REG(sc, 0, reg) |
| 126 | #define WRITE_REG_0(sc, reg, val) WRITE_REG(sc,0, reg, val) |
| 127 | #define READ_REG_1(sc, reg) READ_REG(sc, 1, reg) |
| 128 | #define WRITE_REG_1(sc, reg, val) WRITE_REG(sc,1, reg, val) |
| 129 | |
| 130 | static int |
| 131 | hipp_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri) |
| 132 | { |
| 133 | return EINVAL; |
| 134 | } |
| 135 | |
| 136 | static int |
| 137 | hipp_freesession(device_t dev, u_int64_t tid) |
| 138 | { |
| 139 | return EINVAL; |
| 140 | } |
| 141 | |
| 142 | static int |
| 143 | hipp_process(device_t dev, struct cryptop *crp, int hint) |
| 144 | { |
| 145 | return EINVAL; |
| 146 | } |
| 147 | |
| 148 | static const char* |
| 149 | hipp_partname(struct hipp_softc *sc, char buf[128], size_t blen) |
| 150 | { |
| 151 | char *n = NULL; |
| 152 | |
| 153 | switch (pci_get_vendor(sc->sc_pcidev)) { |
| 154 | case PCI_VENDOR_HIFN: |
| 155 | switch (pci_get_device(sc->sc_pcidev)) { |
| 156 | case PCI_PRODUCT_HIFN_7855: n = "Hifn 7855"; |
| 157 | case PCI_PRODUCT_HIFN_8155: n = "Hifn 8155"; |
| 158 | case PCI_PRODUCT_HIFN_6500: n = "Hifn 6500"; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | if(n==NULL) { |
| 163 | snprintf(buf, blen, "VID=%02x,PID=%02x", |
| 164 | pci_get_vendor(sc->sc_pcidev), |
| 165 | pci_get_device(sc->sc_pcidev)); |
| 166 | } else { |
| 167 | buf[0]='\0'; |
| 168 | strncat(buf, n, blen); |
| 169 | } |
| 170 | return buf; |
| 171 | } |
| 172 | |
| 173 | struct hipp_fs_entry { |
| 174 | struct attribute attr; |
| 175 | /* other stuff */ |
| 176 | }; |
| 177 | |
| 178 | |
| 179 | static ssize_t |
| 180 | cryptoid_show(struct device *dev, |
| 181 | struct device_attribute *attr, |
| 182 | char *buf) |
| 183 | { |
| 184 | struct hipp_softc *sc; |
| 185 | |
| 186 | sc = pci_get_drvdata(to_pci_dev (dev)); |
| 187 | return sprintf (buf, "%d\n", sc->sc_cid); |
| 188 | } |
| 189 | |
| 190 | struct device_attribute hipp_dev_cryptoid = __ATTR_RO(cryptoid); |
| 191 | |
| 192 | /* |
| 193 | * Attach an interface that successfully probed. |
| 194 | */ |
| 195 | static int |
| 196 | hipp_probe(struct pci_dev *dev, const struct pci_device_id *ent) |
| 197 | { |
| 198 | struct hipp_softc *sc = NULL; |
| 199 | int i; |
| 200 | //char rbase; |
| 201 | //u_int16_t ena; |
| 202 | int rev; |
| 203 | //int rseg; |
| 204 | int rc; |
| 205 | |
| 206 | DPRINTF("%s()\n", __FUNCTION__); |
| 207 | |
| 208 | if (pci_enable_device(dev) < 0) |
| 209 | return(-ENODEV); |
| 210 | |
| 211 | if (pci_set_mwi(dev)) |
| 212 | return(-ENODEV); |
| 213 | |
| 214 | if (!dev->irq) { |
| 215 | printk("hifn: found device with no IRQ assigned. check BIOS settings!"); |
| 216 | pci_disable_device(dev); |
| 217 | return(-ENODEV); |
| 218 | } |
| 219 | |
| 220 | sc = (struct hipp_softc *) kmalloc(sizeof(*sc), GFP_KERNEL); |
| 221 | if (!sc) |
| 222 | return(-ENOMEM); |
| 223 | memset(sc, 0, sizeof(*sc)); |
| 224 | |
| 225 | softc_device_init(sc, "hifn-hipp", hipp_num_chips, hipp_methods); |
| 226 | |
| 227 | sc->sc_pcidev = dev; |
| 228 | sc->sc_irq = -1; |
| 229 | sc->sc_cid = -1; |
| 230 | sc->sc_num = hipp_num_chips++; |
| 231 | |
| 232 | if (sc->sc_num < HIPP_MAX_CHIPS) |
| 233 | hipp_chip_idx[sc->sc_num] = sc; |
| 234 | |
| 235 | pci_set_drvdata(sc->sc_pcidev, sc); |
| 236 | |
| 237 | spin_lock_init(&sc->sc_mtx); |
| 238 | |
| 239 | /* |
| 240 | * Setup PCI resources. |
| 241 | * The READ_REG_0, WRITE_REG_0, READ_REG_1, |
| 242 | * and WRITE_REG_1 macros throughout the driver are used |
| 243 | * to permit better debugging. |
| 244 | */ |
| 245 | for(i=0; i<4; i++) { |
| 246 | unsigned long mem_start, mem_len; |
| 247 | mem_start = pci_resource_start(sc->sc_pcidev, i); |
| 248 | mem_len = pci_resource_len(sc->sc_pcidev, i); |
| 249 | sc->sc_barphy[i] = (caddr_t)mem_start; |
| 250 | sc->sc_bar[i] = (ocf_iomem_t) ioremap(mem_start, mem_len); |
| 251 | if (!sc->sc_bar[i]) { |
| 252 | device_printf(sc->sc_dev, "cannot map bar%d register space\n", i); |
| 253 | goto fail; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | //hipp_reset_board(sc, 0); |
| 258 | pci_set_master(sc->sc_pcidev); |
| 259 | |
| 260 | /* |
| 261 | * Arrange the interrupt line. |
| 262 | */ |
| 263 | rc = request_irq(dev->irq, hipp_intr, IRQF_SHARED, "hifn", sc); |
| 264 | if (rc) { |
| 265 | device_printf(sc->sc_dev, "could not map interrupt: %d\n", rc); |
| 266 | goto fail; |
| 267 | } |
| 268 | sc->sc_irq = dev->irq; |
| 269 | |
| 270 | rev = READ_REG_1(sc, HIPP_1_REVID) & 0xffff; |
| 271 | |
| 272 | { |
| 273 | char b[32]; |
| 274 | device_printf(sc->sc_dev, "%s, rev %u", |
| 275 | hipp_partname(sc, b, sizeof(b)), rev); |
| 276 | } |
| 277 | |
| 278 | #if 0 |
| 279 | if (sc->sc_flags & HIFN_IS_7956) |
| 280 | printf(", pll=0x%x<%s clk, %ux mult>", |
| 281 | sc->sc_pllconfig, |
| 282 | sc->sc_pllconfig & HIFN_PLL_REF_SEL ? "ext" : "pci", |
| 283 | 2 + 2*((sc->sc_pllconfig & HIFN_PLL_ND) >> 11)); |
| 284 | #endif |
| 285 | printf("\n"); |
| 286 | |
| 287 | sc->sc_cid = crypto_get_driverid(softc_get_device(sc),CRYPTOCAP_F_HARDWARE); |
| 288 | if (sc->sc_cid < 0) { |
| 289 | device_printf(sc->sc_dev, "could not get crypto driver id\n"); |
| 290 | goto fail; |
| 291 | } |
| 292 | |
| 293 | #if 0 /* cannot work with a non-GPL module */ |
| 294 | /* make a sysfs entry to let the world know what entry we got */ |
| 295 | sysfs_create_file(&sc->sc_pcidev->dev.kobj, &hipp_dev_cryptoid.attr); |
| 296 | #endif |
| 297 | |
| 298 | #if 0 |
| 299 | init_timer(&sc->sc_tickto); |
| 300 | sc->sc_tickto.function = hifn_tick; |
| 301 | sc->sc_tickto.data = (unsigned long) sc->sc_num; |
| 302 | mod_timer(&sc->sc_tickto, jiffies + HZ); |
| 303 | #endif |
| 304 | |
| 305 | #if 0 /* no code here yet ?? */ |
| 306 | crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0); |
| 307 | #endif |
| 308 | |
| 309 | return (0); |
| 310 | |
| 311 | fail: |
| 312 | if (sc->sc_cid >= 0) |
| 313 | crypto_unregister_all(sc->sc_cid); |
| 314 | if (sc->sc_irq != -1) |
| 315 | free_irq(sc->sc_irq, sc); |
| 316 | |
| 317 | #if 0 |
| 318 | if (sc->sc_dma) { |
| 319 | /* Turn off DMA polling */ |
| 320 | WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET | |
| 321 | HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE); |
| 322 | |
| 323 | pci_free_consistent(sc->sc_pcidev, |
| 324 | sizeof(*sc->sc_dma), |
| 325 | sc->sc_dma, sc->sc_dma_physaddr); |
| 326 | } |
| 327 | #endif |
| 328 | kfree(sc); |
| 329 | return (-ENXIO); |
| 330 | } |
| 331 | |
| 332 | /* |
| 333 | * Detach an interface that successfully probed. |
| 334 | */ |
| 335 | static void |
| 336 | hipp_remove(struct pci_dev *dev) |
| 337 | { |
| 338 | struct hipp_softc *sc = pci_get_drvdata(dev); |
| 339 | unsigned long l_flags; |
| 340 | |
| 341 | DPRINTF("%s()\n", __FUNCTION__); |
| 342 | |
| 343 | /* disable interrupts */ |
| 344 | HIPP_LOCK(sc); |
| 345 | |
| 346 | #if 0 |
| 347 | WRITE_REG_1(sc, HIFN_1_DMA_IER, 0); |
| 348 | HIFN_UNLOCK(sc); |
| 349 | |
| 350 | /*XXX other resources */ |
| 351 | del_timer_sync(&sc->sc_tickto); |
| 352 | |
| 353 | /* Turn off DMA polling */ |
| 354 | WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET | |
| 355 | HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE); |
| 356 | #endif |
| 357 | |
| 358 | crypto_unregister_all(sc->sc_cid); |
| 359 | |
| 360 | free_irq(sc->sc_irq, sc); |
| 361 | |
| 362 | #if 0 |
| 363 | pci_free_consistent(sc->sc_pcidev, sizeof(*sc->sc_dma), |
| 364 | sc->sc_dma, sc->sc_dma_physaddr); |
| 365 | #endif |
| 366 | } |
| 367 | |
| 368 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19) |
| 369 | static irqreturn_t hipp_intr(int irq, void *arg) |
| 370 | #else |
| 371 | static irqreturn_t hipp_intr(int irq, void *arg, struct pt_regs *regs) |
| 372 | #endif |
| 373 | { |
| 374 | struct hipp_softc *sc = arg; |
| 375 | |
| 376 | sc = sc; /* shut up compiler */ |
| 377 | |
| 378 | return IRQ_HANDLED; |
| 379 | } |
| 380 | |
| 381 | static struct pci_device_id hipp_pci_tbl[] = { |
| 382 | { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_7855, |
| 383 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, |
| 384 | { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_8155, |
| 385 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, |
| 386 | { 0 }, /* terminating entry */ |
| 387 | }; |
| 388 | MODULE_DEVICE_TABLE(pci, hipp_pci_tbl); |
| 389 | |
| 390 | static struct pci_driver hipp_driver = { |
| 391 | .name = "hipp", |
| 392 | .id_table = hipp_pci_tbl, |
| 393 | .probe = hipp_probe, |
| 394 | .remove = hipp_remove, |
| 395 | /* add PM stuff here one day */ |
| 396 | }; |
| 397 | |
| 398 | static int __init hipp_init (void) |
| 399 | { |
| 400 | struct hipp_softc *sc = NULL; |
| 401 | int rc; |
| 402 | |
| 403 | DPRINTF("%s(%p)\n", __FUNCTION__, hipp_init); |
| 404 | |
| 405 | rc = pci_register_driver(&hipp_driver); |
| 406 | pci_register_driver_compat(&hipp_driver, rc); |
| 407 | |
| 408 | return rc; |
| 409 | } |
| 410 | |
| 411 | static void __exit hipp_exit (void) |
| 412 | { |
| 413 | pci_unregister_driver(&hipp_driver); |
| 414 | } |
| 415 | |
| 416 | module_init(hipp_init); |
| 417 | module_exit(hipp_exit); |
| 418 | |
| 419 | MODULE_LICENSE("BSD"); |
| 420 | MODULE_AUTHOR("Michael Richardson <mcr@xelerance.com>"); |
| 421 | MODULE_DESCRIPTION("OCF driver for hifn HIPP-I/II PCI crypto devices"); |
| 422 | |
