1ea0375afSGary R Hook /* 2ea0375afSGary R Hook * AMD Cryptographic Coprocessor (CCP) driver 3ea0375afSGary R Hook * 4ea0375afSGary R Hook * Copyright (C) 2013,2016 Advanced Micro Devices, Inc. 5ea0375afSGary R Hook * 6ea0375afSGary R Hook * Author: Tom Lendacky <thomas.lendacky@amd.com> 7ea0375afSGary R Hook * 8ea0375afSGary R Hook * This program is free software; you can redistribute it and/or modify 9ea0375afSGary R Hook * it under the terms of the GNU General Public License version 2 as 10ea0375afSGary R Hook * published by the Free Software Foundation. 11ea0375afSGary R Hook */ 12ea0375afSGary R Hook 13ea0375afSGary R Hook #include <linux/module.h> 14ea0375afSGary R Hook #include <linux/kernel.h> 15ea0375afSGary R Hook #include <linux/pci.h> 16ea0375afSGary R Hook #include <linux/kthread.h> 17ea0375afSGary R Hook #include <linux/interrupt.h> 18ea0375afSGary R Hook #include <linux/ccp.h> 19ea0375afSGary R Hook 20ea0375afSGary R Hook #include "ccp-dev.h" 21ea0375afSGary R Hook 22ea0375afSGary R Hook static int ccp_do_cmd(struct ccp_op *op, u32 *cr, unsigned int cr_count) 23ea0375afSGary R Hook { 24ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q = op->cmd_q; 25ea0375afSGary R Hook struct ccp_device *ccp = cmd_q->ccp; 26ea0375afSGary R Hook void __iomem *cr_addr; 27ea0375afSGary R Hook u32 cr0, cmd; 28ea0375afSGary R Hook unsigned int i; 29ea0375afSGary R Hook int ret = 0; 30ea0375afSGary R Hook 31ea0375afSGary R Hook /* We could read a status register to see how many free slots 32ea0375afSGary R Hook * are actually available, but reading that register resets it 33ea0375afSGary R Hook * and you could lose some error information. 34ea0375afSGary R Hook */ 35ea0375afSGary R Hook cmd_q->free_slots--; 36ea0375afSGary R Hook 37ea0375afSGary R Hook cr0 = (cmd_q->id << REQ0_CMD_Q_SHIFT) 38ea0375afSGary R Hook | (op->jobid << REQ0_JOBID_SHIFT) 39ea0375afSGary R Hook | REQ0_WAIT_FOR_WRITE; 40ea0375afSGary R Hook 41ea0375afSGary R Hook if (op->soc) 42ea0375afSGary R Hook cr0 |= REQ0_STOP_ON_COMPLETE 43ea0375afSGary R Hook | REQ0_INT_ON_COMPLETE; 44ea0375afSGary R Hook 45ea0375afSGary R Hook if (op->ioc || !cmd_q->free_slots) 46ea0375afSGary R Hook cr0 |= REQ0_INT_ON_COMPLETE; 47ea0375afSGary R Hook 48ea0375afSGary R Hook /* Start at CMD_REQ1 */ 49ea0375afSGary R Hook cr_addr = ccp->io_regs + CMD_REQ0 + CMD_REQ_INCR; 50ea0375afSGary R Hook 51ea0375afSGary R Hook mutex_lock(&ccp->req_mutex); 52ea0375afSGary R Hook 53ea0375afSGary R Hook /* Write CMD_REQ1 through CMD_REQx first */ 54ea0375afSGary R Hook for (i = 0; i < cr_count; i++, cr_addr += CMD_REQ_INCR) 55ea0375afSGary R Hook iowrite32(*(cr + i), cr_addr); 56ea0375afSGary R Hook 57ea0375afSGary R Hook /* Tell the CCP to start */ 58ea0375afSGary R Hook wmb(); 59ea0375afSGary R Hook iowrite32(cr0, ccp->io_regs + CMD_REQ0); 60ea0375afSGary R Hook 61ea0375afSGary R Hook mutex_unlock(&ccp->req_mutex); 62ea0375afSGary R Hook 63ea0375afSGary R Hook if (cr0 & REQ0_INT_ON_COMPLETE) { 64ea0375afSGary R Hook /* Wait for the job to complete */ 65ea0375afSGary R Hook ret = wait_event_interruptible(cmd_q->int_queue, 66ea0375afSGary R Hook cmd_q->int_rcvd); 67ea0375afSGary R Hook if (ret || cmd_q->cmd_error) { 68ea0375afSGary R Hook /* On error delete all related jobs from the queue */ 69ea0375afSGary R Hook cmd = (cmd_q->id << DEL_Q_ID_SHIFT) 70ea0375afSGary R Hook | op->jobid; 71ea0375afSGary R Hook 72ea0375afSGary R Hook iowrite32(cmd, ccp->io_regs + DEL_CMD_Q_JOB); 73ea0375afSGary R Hook 74ea0375afSGary R Hook if (!ret) 75ea0375afSGary R Hook ret = -EIO; 76ea0375afSGary R Hook } else if (op->soc) { 77ea0375afSGary R Hook /* Delete just head job from the queue on SoC */ 78ea0375afSGary R Hook cmd = DEL_Q_ACTIVE 79ea0375afSGary R Hook | (cmd_q->id << DEL_Q_ID_SHIFT) 80ea0375afSGary R Hook | op->jobid; 81ea0375afSGary R Hook 82ea0375afSGary R Hook iowrite32(cmd, ccp->io_regs + DEL_CMD_Q_JOB); 83ea0375afSGary R Hook } 84ea0375afSGary R Hook 85ea0375afSGary R Hook cmd_q->free_slots = CMD_Q_DEPTH(cmd_q->q_status); 86ea0375afSGary R Hook 87ea0375afSGary R Hook cmd_q->int_rcvd = 0; 88ea0375afSGary R Hook } 89ea0375afSGary R Hook 90ea0375afSGary R Hook return ret; 91ea0375afSGary R Hook } 92ea0375afSGary R Hook 93ea0375afSGary R Hook static int ccp_perform_aes(struct ccp_op *op) 94ea0375afSGary R Hook { 95ea0375afSGary R Hook u32 cr[6]; 96ea0375afSGary R Hook 97ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 98ea0375afSGary R Hook cr[0] = (CCP_ENGINE_AES << REQ1_ENGINE_SHIFT) 99ea0375afSGary R Hook | (op->u.aes.type << REQ1_AES_TYPE_SHIFT) 100ea0375afSGary R Hook | (op->u.aes.mode << REQ1_AES_MODE_SHIFT) 101ea0375afSGary R Hook | (op->u.aes.action << REQ1_AES_ACTION_SHIFT) 102ea0375afSGary R Hook | (op->ksb_key << REQ1_KEY_KSB_SHIFT); 103ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 104ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 105ea0375afSGary R Hook cr[3] = (op->ksb_ctx << REQ4_KSB_SHIFT) 106ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 107ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 108ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 109ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 110ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 111ea0375afSGary R Hook 112ea0375afSGary R Hook if (op->u.aes.mode == CCP_AES_MODE_CFB) 113ea0375afSGary R Hook cr[0] |= ((0x7f) << REQ1_AES_CFB_SIZE_SHIFT); 114ea0375afSGary R Hook 115ea0375afSGary R Hook if (op->eom) 116ea0375afSGary R Hook cr[0] |= REQ1_EOM; 117ea0375afSGary R Hook 118ea0375afSGary R Hook if (op->init) 119ea0375afSGary R Hook cr[0] |= REQ1_INIT; 120ea0375afSGary R Hook 121ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 122ea0375afSGary R Hook } 123ea0375afSGary R Hook 124ea0375afSGary R Hook static int ccp_perform_xts_aes(struct ccp_op *op) 125ea0375afSGary R Hook { 126ea0375afSGary R Hook u32 cr[6]; 127ea0375afSGary R Hook 128ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 129ea0375afSGary R Hook cr[0] = (CCP_ENGINE_XTS_AES_128 << REQ1_ENGINE_SHIFT) 130ea0375afSGary R Hook | (op->u.xts.action << REQ1_AES_ACTION_SHIFT) 131ea0375afSGary R Hook | (op->u.xts.unit_size << REQ1_XTS_AES_SIZE_SHIFT) 132ea0375afSGary R Hook | (op->ksb_key << REQ1_KEY_KSB_SHIFT); 133ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 134ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 135ea0375afSGary R Hook cr[3] = (op->ksb_ctx << REQ4_KSB_SHIFT) 136ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 137ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 138ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 139ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 140ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 141ea0375afSGary R Hook 142ea0375afSGary R Hook if (op->eom) 143ea0375afSGary R Hook cr[0] |= REQ1_EOM; 144ea0375afSGary R Hook 145ea0375afSGary R Hook if (op->init) 146ea0375afSGary R Hook cr[0] |= REQ1_INIT; 147ea0375afSGary R Hook 148ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 149ea0375afSGary R Hook } 150ea0375afSGary R Hook 151ea0375afSGary R Hook static int ccp_perform_sha(struct ccp_op *op) 152ea0375afSGary R Hook { 153ea0375afSGary R Hook u32 cr[6]; 154ea0375afSGary R Hook 155ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 156ea0375afSGary R Hook cr[0] = (CCP_ENGINE_SHA << REQ1_ENGINE_SHIFT) 157ea0375afSGary R Hook | (op->u.sha.type << REQ1_SHA_TYPE_SHIFT) 158ea0375afSGary R Hook | REQ1_INIT; 159ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 160ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 161ea0375afSGary R Hook cr[3] = (op->ksb_ctx << REQ4_KSB_SHIFT) 162ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 163ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 164ea0375afSGary R Hook 165ea0375afSGary R Hook if (op->eom) { 166ea0375afSGary R Hook cr[0] |= REQ1_EOM; 167ea0375afSGary R Hook cr[4] = lower_32_bits(op->u.sha.msg_bits); 168ea0375afSGary R Hook cr[5] = upper_32_bits(op->u.sha.msg_bits); 169ea0375afSGary R Hook } else { 170ea0375afSGary R Hook cr[4] = 0; 171ea0375afSGary R Hook cr[5] = 0; 172ea0375afSGary R Hook } 173ea0375afSGary R Hook 174ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 175ea0375afSGary R Hook } 176ea0375afSGary R Hook 177ea0375afSGary R Hook static int ccp_perform_rsa(struct ccp_op *op) 178ea0375afSGary R Hook { 179ea0375afSGary R Hook u32 cr[6]; 180ea0375afSGary R Hook 181ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 182ea0375afSGary R Hook cr[0] = (CCP_ENGINE_RSA << REQ1_ENGINE_SHIFT) 183ea0375afSGary R Hook | (op->u.rsa.mod_size << REQ1_RSA_MOD_SIZE_SHIFT) 184ea0375afSGary R Hook | (op->ksb_key << REQ1_KEY_KSB_SHIFT) 185ea0375afSGary R Hook | REQ1_EOM; 186ea0375afSGary R Hook cr[1] = op->u.rsa.input_len - 1; 187ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 188ea0375afSGary R Hook cr[3] = (op->ksb_ctx << REQ4_KSB_SHIFT) 189ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 190ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 191ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 192ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 193ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 194ea0375afSGary R Hook 195ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 196ea0375afSGary R Hook } 197ea0375afSGary R Hook 198ea0375afSGary R Hook static int ccp_perform_passthru(struct ccp_op *op) 199ea0375afSGary R Hook { 200ea0375afSGary R Hook u32 cr[6]; 201ea0375afSGary R Hook 202ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 203ea0375afSGary R Hook cr[0] = (CCP_ENGINE_PASSTHRU << REQ1_ENGINE_SHIFT) 204ea0375afSGary R Hook | (op->u.passthru.bit_mod << REQ1_PT_BW_SHIFT) 205ea0375afSGary R Hook | (op->u.passthru.byte_swap << REQ1_PT_BS_SHIFT); 206ea0375afSGary R Hook 207ea0375afSGary R Hook if (op->src.type == CCP_MEMTYPE_SYSTEM) 208ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 209ea0375afSGary R Hook else 210ea0375afSGary R Hook cr[1] = op->dst.u.dma.length - 1; 211ea0375afSGary R Hook 212ea0375afSGary R Hook if (op->src.type == CCP_MEMTYPE_SYSTEM) { 213ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 214ea0375afSGary R Hook cr[3] = (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 215ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 216ea0375afSGary R Hook 217ea0375afSGary R Hook if (op->u.passthru.bit_mod != CCP_PASSTHRU_BITWISE_NOOP) 218ea0375afSGary R Hook cr[3] |= (op->ksb_key << REQ4_KSB_SHIFT); 219ea0375afSGary R Hook } else { 220ea0375afSGary R Hook cr[2] = op->src.u.ksb * CCP_KSB_BYTES; 221ea0375afSGary R Hook cr[3] = (CCP_MEMTYPE_KSB << REQ4_MEMTYPE_SHIFT); 222ea0375afSGary R Hook } 223ea0375afSGary R Hook 224ea0375afSGary R Hook if (op->dst.type == CCP_MEMTYPE_SYSTEM) { 225ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 226ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 227ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 228ea0375afSGary R Hook } else { 229ea0375afSGary R Hook cr[4] = op->dst.u.ksb * CCP_KSB_BYTES; 230ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_KSB << REQ6_MEMTYPE_SHIFT); 231ea0375afSGary R Hook } 232ea0375afSGary R Hook 233ea0375afSGary R Hook if (op->eom) 234ea0375afSGary R Hook cr[0] |= REQ1_EOM; 235ea0375afSGary R Hook 236ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 237ea0375afSGary R Hook } 238ea0375afSGary R Hook 239ea0375afSGary R Hook static int ccp_perform_ecc(struct ccp_op *op) 240ea0375afSGary R Hook { 241ea0375afSGary R Hook u32 cr[6]; 242ea0375afSGary R Hook 243ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 244ea0375afSGary R Hook cr[0] = REQ1_ECC_AFFINE_CONVERT 245ea0375afSGary R Hook | (CCP_ENGINE_ECC << REQ1_ENGINE_SHIFT) 246ea0375afSGary R Hook | (op->u.ecc.function << REQ1_ECC_FUNCTION_SHIFT) 247ea0375afSGary R Hook | REQ1_EOM; 248ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 249ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 250ea0375afSGary R Hook cr[3] = (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 251ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 252ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 253ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 254ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 255ea0375afSGary R Hook 256ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 257ea0375afSGary R Hook } 258ea0375afSGary R Hook 259ea0375afSGary R Hook static int ccp_trng_read(struct hwrng *rng, void *data, size_t max, bool wait) 260ea0375afSGary R Hook { 261ea0375afSGary R Hook struct ccp_device *ccp = container_of(rng, struct ccp_device, hwrng); 262ea0375afSGary R Hook u32 trng_value; 263ea0375afSGary R Hook int len = min_t(int, sizeof(trng_value), max); 264ea0375afSGary R Hook 265ea0375afSGary R Hook /* 266ea0375afSGary R Hook * Locking is provided by the caller so we can update device 267ea0375afSGary R Hook * hwrng-related fields safely 268ea0375afSGary R Hook */ 269ea0375afSGary R Hook trng_value = ioread32(ccp->io_regs + TRNG_OUT_REG); 270ea0375afSGary R Hook if (!trng_value) { 271ea0375afSGary R Hook /* Zero is returned if not data is available or if a 272ea0375afSGary R Hook * bad-entropy error is present. Assume an error if 273ea0375afSGary R Hook * we exceed TRNG_RETRIES reads of zero. 274ea0375afSGary R Hook */ 275ea0375afSGary R Hook if (ccp->hwrng_retries++ > TRNG_RETRIES) 276ea0375afSGary R Hook return -EIO; 277ea0375afSGary R Hook 278ea0375afSGary R Hook return 0; 279ea0375afSGary R Hook } 280ea0375afSGary R Hook 281ea0375afSGary R Hook /* Reset the counter and save the rng value */ 282ea0375afSGary R Hook ccp->hwrng_retries = 0; 283ea0375afSGary R Hook memcpy(data, &trng_value, len); 284ea0375afSGary R Hook 285ea0375afSGary R Hook return len; 286ea0375afSGary R Hook } 287ea0375afSGary R Hook 288ea0375afSGary R Hook static int ccp_init(struct ccp_device *ccp) 289ea0375afSGary R Hook { 290ea0375afSGary R Hook struct device *dev = ccp->dev; 291ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 292ea0375afSGary R Hook struct dma_pool *dma_pool; 293ea0375afSGary R Hook char dma_pool_name[MAX_DMAPOOL_NAME_LEN]; 294ea0375afSGary R Hook unsigned int qmr, qim, i; 295ea0375afSGary R Hook int ret; 296ea0375afSGary R Hook 297ea0375afSGary R Hook /* Find available queues */ 298ea0375afSGary R Hook qim = 0; 299ea0375afSGary R Hook qmr = ioread32(ccp->io_regs + Q_MASK_REG); 300ea0375afSGary R Hook for (i = 0; i < MAX_HW_QUEUES; i++) { 301ea0375afSGary R Hook if (!(qmr & (1 << i))) 302ea0375afSGary R Hook continue; 303ea0375afSGary R Hook 304ea0375afSGary R Hook /* Allocate a dma pool for this queue */ 305ea0375afSGary R Hook snprintf(dma_pool_name, sizeof(dma_pool_name), "%s_q%d", 306ea0375afSGary R Hook ccp->name, i); 307ea0375afSGary R Hook dma_pool = dma_pool_create(dma_pool_name, dev, 308ea0375afSGary R Hook CCP_DMAPOOL_MAX_SIZE, 309ea0375afSGary R Hook CCP_DMAPOOL_ALIGN, 0); 310ea0375afSGary R Hook if (!dma_pool) { 311ea0375afSGary R Hook dev_err(dev, "unable to allocate dma pool\n"); 312ea0375afSGary R Hook ret = -ENOMEM; 313ea0375afSGary R Hook goto e_pool; 314ea0375afSGary R Hook } 315ea0375afSGary R Hook 316ea0375afSGary R Hook cmd_q = &ccp->cmd_q[ccp->cmd_q_count]; 317ea0375afSGary R Hook ccp->cmd_q_count++; 318ea0375afSGary R Hook 319ea0375afSGary R Hook cmd_q->ccp = ccp; 320ea0375afSGary R Hook cmd_q->id = i; 321ea0375afSGary R Hook cmd_q->dma_pool = dma_pool; 322ea0375afSGary R Hook 323ea0375afSGary R Hook /* Reserve 2 KSB regions for the queue */ 324ea0375afSGary R Hook cmd_q->ksb_key = KSB_START + ccp->ksb_start++; 325ea0375afSGary R Hook cmd_q->ksb_ctx = KSB_START + ccp->ksb_start++; 326ea0375afSGary R Hook ccp->ksb_count -= 2; 327ea0375afSGary R Hook 328ea0375afSGary R Hook /* Preset some register values and masks that are queue 329ea0375afSGary R Hook * number dependent 330ea0375afSGary R Hook */ 331ea0375afSGary R Hook cmd_q->reg_status = ccp->io_regs + CMD_Q_STATUS_BASE + 332ea0375afSGary R Hook (CMD_Q_STATUS_INCR * i); 333ea0375afSGary R Hook cmd_q->reg_int_status = ccp->io_regs + CMD_Q_INT_STATUS_BASE + 334ea0375afSGary R Hook (CMD_Q_STATUS_INCR * i); 335ea0375afSGary R Hook cmd_q->int_ok = 1 << (i * 2); 336ea0375afSGary R Hook cmd_q->int_err = 1 << ((i * 2) + 1); 337ea0375afSGary R Hook 338ea0375afSGary R Hook cmd_q->free_slots = CMD_Q_DEPTH(ioread32(cmd_q->reg_status)); 339ea0375afSGary R Hook 340ea0375afSGary R Hook init_waitqueue_head(&cmd_q->int_queue); 341ea0375afSGary R Hook 342ea0375afSGary R Hook /* Build queue interrupt mask (two interrupts per queue) */ 343ea0375afSGary R Hook qim |= cmd_q->int_ok | cmd_q->int_err; 344ea0375afSGary R Hook 345ea0375afSGary R Hook #ifdef CONFIG_ARM64 346ea0375afSGary R Hook /* For arm64 set the recommended queue cache settings */ 347ea0375afSGary R Hook iowrite32(ccp->axcache, ccp->io_regs + CMD_Q_CACHE_BASE + 348ea0375afSGary R Hook (CMD_Q_CACHE_INC * i)); 349ea0375afSGary R Hook #endif 350ea0375afSGary R Hook 351ea0375afSGary R Hook dev_dbg(dev, "queue #%u available\n", i); 352ea0375afSGary R Hook } 353ea0375afSGary R Hook if (ccp->cmd_q_count == 0) { 354ea0375afSGary R Hook dev_notice(dev, "no command queues available\n"); 355ea0375afSGary R Hook ret = -EIO; 356ea0375afSGary R Hook goto e_pool; 357ea0375afSGary R Hook } 358ea0375afSGary R Hook dev_notice(dev, "%u command queues available\n", ccp->cmd_q_count); 359ea0375afSGary R Hook 360ea0375afSGary R Hook /* Disable and clear interrupts until ready */ 361ea0375afSGary R Hook iowrite32(0x00, ccp->io_regs + IRQ_MASK_REG); 362ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 363ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 364ea0375afSGary R Hook 365ea0375afSGary R Hook ioread32(cmd_q->reg_int_status); 366ea0375afSGary R Hook ioread32(cmd_q->reg_status); 367ea0375afSGary R Hook } 368ea0375afSGary R Hook iowrite32(qim, ccp->io_regs + IRQ_STATUS_REG); 369ea0375afSGary R Hook 370ea0375afSGary R Hook /* Request an irq */ 371ea0375afSGary R Hook ret = ccp->get_irq(ccp); 372ea0375afSGary R Hook if (ret) { 373ea0375afSGary R Hook dev_err(dev, "unable to allocate an IRQ\n"); 374ea0375afSGary R Hook goto e_pool; 375ea0375afSGary R Hook } 376ea0375afSGary R Hook 377ea0375afSGary R Hook /* Initialize the queues used to wait for KSB space and suspend */ 378ea0375afSGary R Hook init_waitqueue_head(&ccp->ksb_queue); 379ea0375afSGary R Hook init_waitqueue_head(&ccp->suspend_queue); 380ea0375afSGary R Hook 381ea0375afSGary R Hook /* Create a kthread for each queue */ 382ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 383ea0375afSGary R Hook struct task_struct *kthread; 384ea0375afSGary R Hook 385ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 386ea0375afSGary R Hook 387ea0375afSGary R Hook kthread = kthread_create(ccp_cmd_queue_thread, cmd_q, 388ea0375afSGary R Hook "%s-q%u", ccp->name, cmd_q->id); 389ea0375afSGary R Hook if (IS_ERR(kthread)) { 390ea0375afSGary R Hook dev_err(dev, "error creating queue thread (%ld)\n", 391ea0375afSGary R Hook PTR_ERR(kthread)); 392ea0375afSGary R Hook ret = PTR_ERR(kthread); 393ea0375afSGary R Hook goto e_kthread; 394ea0375afSGary R Hook } 395ea0375afSGary R Hook 396ea0375afSGary R Hook cmd_q->kthread = kthread; 397ea0375afSGary R Hook wake_up_process(kthread); 398ea0375afSGary R Hook } 399ea0375afSGary R Hook 400ea0375afSGary R Hook /* Register the RNG */ 401ea0375afSGary R Hook ccp->hwrng.name = ccp->rngname; 402ea0375afSGary R Hook ccp->hwrng.read = ccp_trng_read; 403ea0375afSGary R Hook ret = hwrng_register(&ccp->hwrng); 404ea0375afSGary R Hook if (ret) { 405ea0375afSGary R Hook dev_err(dev, "error registering hwrng (%d)\n", ret); 406ea0375afSGary R Hook goto e_kthread; 407ea0375afSGary R Hook } 408ea0375afSGary R Hook 409*58ea8abfSGary R Hook /* Register the DMA engine support */ 410*58ea8abfSGary R Hook ret = ccp_dmaengine_register(ccp); 411*58ea8abfSGary R Hook if (ret) 412*58ea8abfSGary R Hook goto e_hwrng; 413*58ea8abfSGary R Hook 414ea0375afSGary R Hook ccp_add_device(ccp); 415ea0375afSGary R Hook 416ea0375afSGary R Hook /* Enable interrupts */ 417ea0375afSGary R Hook iowrite32(qim, ccp->io_regs + IRQ_MASK_REG); 418ea0375afSGary R Hook 419ea0375afSGary R Hook return 0; 420ea0375afSGary R Hook 421*58ea8abfSGary R Hook e_hwrng: 422*58ea8abfSGary R Hook hwrng_unregister(&ccp->hwrng); 423*58ea8abfSGary R Hook 424ea0375afSGary R Hook e_kthread: 425ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 426ea0375afSGary R Hook if (ccp->cmd_q[i].kthread) 427ea0375afSGary R Hook kthread_stop(ccp->cmd_q[i].kthread); 428ea0375afSGary R Hook 429ea0375afSGary R Hook ccp->free_irq(ccp); 430ea0375afSGary R Hook 431ea0375afSGary R Hook e_pool: 432ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 433ea0375afSGary R Hook dma_pool_destroy(ccp->cmd_q[i].dma_pool); 434ea0375afSGary R Hook 435ea0375afSGary R Hook return ret; 436ea0375afSGary R Hook } 437ea0375afSGary R Hook 438ea0375afSGary R Hook static void ccp_destroy(struct ccp_device *ccp) 439ea0375afSGary R Hook { 440ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 441ea0375afSGary R Hook struct ccp_cmd *cmd; 442ea0375afSGary R Hook unsigned int qim, i; 443ea0375afSGary R Hook 444ea0375afSGary R Hook /* Remove this device from the list of available units first */ 445ea0375afSGary R Hook ccp_del_device(ccp); 446ea0375afSGary R Hook 447*58ea8abfSGary R Hook /* Unregister the DMA engine */ 448*58ea8abfSGary R Hook ccp_dmaengine_unregister(ccp); 449*58ea8abfSGary R Hook 450ea0375afSGary R Hook /* Unregister the RNG */ 451ea0375afSGary R Hook hwrng_unregister(&ccp->hwrng); 452ea0375afSGary R Hook 453ea0375afSGary R Hook /* Stop the queue kthreads */ 454ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 455ea0375afSGary R Hook if (ccp->cmd_q[i].kthread) 456ea0375afSGary R Hook kthread_stop(ccp->cmd_q[i].kthread); 457ea0375afSGary R Hook 458ea0375afSGary R Hook /* Build queue interrupt mask (two interrupt masks per queue) */ 459ea0375afSGary R Hook qim = 0; 460ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 461ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 462ea0375afSGary R Hook qim |= cmd_q->int_ok | cmd_q->int_err; 463ea0375afSGary R Hook } 464ea0375afSGary R Hook 465ea0375afSGary R Hook /* Disable and clear interrupts */ 466ea0375afSGary R Hook iowrite32(0x00, ccp->io_regs + IRQ_MASK_REG); 467ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 468ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 469ea0375afSGary R Hook 470ea0375afSGary R Hook ioread32(cmd_q->reg_int_status); 471ea0375afSGary R Hook ioread32(cmd_q->reg_status); 472ea0375afSGary R Hook } 473ea0375afSGary R Hook iowrite32(qim, ccp->io_regs + IRQ_STATUS_REG); 474ea0375afSGary R Hook 475ea0375afSGary R Hook ccp->free_irq(ccp); 476ea0375afSGary R Hook 477ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 478ea0375afSGary R Hook dma_pool_destroy(ccp->cmd_q[i].dma_pool); 479ea0375afSGary R Hook 480ea0375afSGary R Hook /* Flush the cmd and backlog queue */ 481ea0375afSGary R Hook while (!list_empty(&ccp->cmd)) { 482ea0375afSGary R Hook /* Invoke the callback directly with an error code */ 483ea0375afSGary R Hook cmd = list_first_entry(&ccp->cmd, struct ccp_cmd, entry); 484ea0375afSGary R Hook list_del(&cmd->entry); 485ea0375afSGary R Hook cmd->callback(cmd->data, -ENODEV); 486ea0375afSGary R Hook } 487ea0375afSGary R Hook while (!list_empty(&ccp->backlog)) { 488ea0375afSGary R Hook /* Invoke the callback directly with an error code */ 489ea0375afSGary R Hook cmd = list_first_entry(&ccp->backlog, struct ccp_cmd, entry); 490ea0375afSGary R Hook list_del(&cmd->entry); 491ea0375afSGary R Hook cmd->callback(cmd->data, -ENODEV); 492ea0375afSGary R Hook } 493ea0375afSGary R Hook } 494ea0375afSGary R Hook 495ea0375afSGary R Hook static irqreturn_t ccp_irq_handler(int irq, void *data) 496ea0375afSGary R Hook { 497ea0375afSGary R Hook struct device *dev = data; 498ea0375afSGary R Hook struct ccp_device *ccp = dev_get_drvdata(dev); 499ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 500ea0375afSGary R Hook u32 q_int, status; 501ea0375afSGary R Hook unsigned int i; 502ea0375afSGary R Hook 503ea0375afSGary R Hook status = ioread32(ccp->io_regs + IRQ_STATUS_REG); 504ea0375afSGary R Hook 505ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 506ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 507ea0375afSGary R Hook 508ea0375afSGary R Hook q_int = status & (cmd_q->int_ok | cmd_q->int_err); 509ea0375afSGary R Hook if (q_int) { 510ea0375afSGary R Hook cmd_q->int_status = status; 511ea0375afSGary R Hook cmd_q->q_status = ioread32(cmd_q->reg_status); 512ea0375afSGary R Hook cmd_q->q_int_status = ioread32(cmd_q->reg_int_status); 513ea0375afSGary R Hook 514ea0375afSGary R Hook /* On error, only save the first error value */ 515ea0375afSGary R Hook if ((q_int & cmd_q->int_err) && !cmd_q->cmd_error) 516ea0375afSGary R Hook cmd_q->cmd_error = CMD_Q_ERROR(cmd_q->q_status); 517ea0375afSGary R Hook 518ea0375afSGary R Hook cmd_q->int_rcvd = 1; 519ea0375afSGary R Hook 520ea0375afSGary R Hook /* Acknowledge the interrupt and wake the kthread */ 521ea0375afSGary R Hook iowrite32(q_int, ccp->io_regs + IRQ_STATUS_REG); 522ea0375afSGary R Hook wake_up_interruptible(&cmd_q->int_queue); 523ea0375afSGary R Hook } 524ea0375afSGary R Hook } 525ea0375afSGary R Hook 526ea0375afSGary R Hook return IRQ_HANDLED; 527ea0375afSGary R Hook } 528ea0375afSGary R Hook 529ea0375afSGary R Hook static struct ccp_actions ccp3_actions = { 530ea0375afSGary R Hook .perform_aes = ccp_perform_aes, 531ea0375afSGary R Hook .perform_xts_aes = ccp_perform_xts_aes, 532ea0375afSGary R Hook .perform_sha = ccp_perform_sha, 533ea0375afSGary R Hook .perform_rsa = ccp_perform_rsa, 534ea0375afSGary R Hook .perform_passthru = ccp_perform_passthru, 535ea0375afSGary R Hook .perform_ecc = ccp_perform_ecc, 536ea0375afSGary R Hook .init = ccp_init, 537ea0375afSGary R Hook .destroy = ccp_destroy, 538ea0375afSGary R Hook .irqhandler = ccp_irq_handler, 539ea0375afSGary R Hook }; 540ea0375afSGary R Hook 541ea0375afSGary R Hook struct ccp_vdata ccpv3 = { 542ea0375afSGary R Hook .version = CCP_VERSION(3, 0), 543ea0375afSGary R Hook .perform = &ccp3_actions, 544ea0375afSGary R Hook }; 545