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> 7fba8855cSGary R Hook * Author: Gary R Hook <gary.hook@amd.com> 8ea0375afSGary R Hook * 9ea0375afSGary R Hook * This program is free software; you can redistribute it and/or modify 10ea0375afSGary R Hook * it under the terms of the GNU General Public License version 2 as 11ea0375afSGary R Hook * published by the Free Software Foundation. 12ea0375afSGary R Hook */ 13ea0375afSGary R Hook 14ea0375afSGary R Hook #include <linux/module.h> 15ea0375afSGary R Hook #include <linux/kernel.h> 16ea0375afSGary R Hook #include <linux/pci.h> 17ea0375afSGary R Hook #include <linux/kthread.h> 18ea0375afSGary R Hook #include <linux/interrupt.h> 19ea0375afSGary R Hook #include <linux/ccp.h> 20ea0375afSGary R Hook 21ea0375afSGary R Hook #include "ccp-dev.h" 22ea0375afSGary R Hook 23*58a690b7SGary R Hook static u32 ccp_alloc_ksb(struct ccp_cmd_queue *cmd_q, unsigned int count) 24*58a690b7SGary R Hook { 25*58a690b7SGary R Hook int start; 26*58a690b7SGary R Hook struct ccp_device *ccp = cmd_q->ccp; 27*58a690b7SGary R Hook 28*58a690b7SGary R Hook for (;;) { 29*58a690b7SGary R Hook mutex_lock(&ccp->sb_mutex); 30*58a690b7SGary R Hook 31*58a690b7SGary R Hook start = (u32)bitmap_find_next_zero_area(ccp->sb, 32*58a690b7SGary R Hook ccp->sb_count, 33*58a690b7SGary R Hook ccp->sb_start, 34*58a690b7SGary R Hook count, 0); 35*58a690b7SGary R Hook if (start <= ccp->sb_count) { 36*58a690b7SGary R Hook bitmap_set(ccp->sb, start, count); 37*58a690b7SGary R Hook 38*58a690b7SGary R Hook mutex_unlock(&ccp->sb_mutex); 39*58a690b7SGary R Hook break; 40*58a690b7SGary R Hook } 41*58a690b7SGary R Hook 42*58a690b7SGary R Hook ccp->sb_avail = 0; 43*58a690b7SGary R Hook 44*58a690b7SGary R Hook mutex_unlock(&ccp->sb_mutex); 45*58a690b7SGary R Hook 46*58a690b7SGary R Hook /* Wait for KSB entries to become available */ 47*58a690b7SGary R Hook if (wait_event_interruptible(ccp->sb_queue, ccp->sb_avail)) 48*58a690b7SGary R Hook return 0; 49*58a690b7SGary R Hook } 50*58a690b7SGary R Hook 51*58a690b7SGary R Hook return KSB_START + start; 52*58a690b7SGary R Hook } 53*58a690b7SGary R Hook 54*58a690b7SGary R Hook static void ccp_free_ksb(struct ccp_cmd_queue *cmd_q, unsigned int start, 55*58a690b7SGary R Hook unsigned int count) 56*58a690b7SGary R Hook { 57*58a690b7SGary R Hook struct ccp_device *ccp = cmd_q->ccp; 58*58a690b7SGary R Hook 59*58a690b7SGary R Hook if (!start) 60*58a690b7SGary R Hook return; 61*58a690b7SGary R Hook 62*58a690b7SGary R Hook mutex_lock(&ccp->sb_mutex); 63*58a690b7SGary R Hook 64*58a690b7SGary R Hook bitmap_clear(ccp->sb, start - KSB_START, count); 65*58a690b7SGary R Hook 66*58a690b7SGary R Hook ccp->sb_avail = 1; 67*58a690b7SGary R Hook 68*58a690b7SGary R Hook mutex_unlock(&ccp->sb_mutex); 69*58a690b7SGary R Hook 70*58a690b7SGary R Hook wake_up_interruptible_all(&ccp->sb_queue); 71*58a690b7SGary R Hook } 72*58a690b7SGary R Hook 73ea0375afSGary R Hook static int ccp_do_cmd(struct ccp_op *op, u32 *cr, unsigned int cr_count) 74ea0375afSGary R Hook { 75ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q = op->cmd_q; 76ea0375afSGary R Hook struct ccp_device *ccp = cmd_q->ccp; 77ea0375afSGary R Hook void __iomem *cr_addr; 78ea0375afSGary R Hook u32 cr0, cmd; 79ea0375afSGary R Hook unsigned int i; 80ea0375afSGary R Hook int ret = 0; 81ea0375afSGary R Hook 82ea0375afSGary R Hook /* We could read a status register to see how many free slots 83ea0375afSGary R Hook * are actually available, but reading that register resets it 84ea0375afSGary R Hook * and you could lose some error information. 85ea0375afSGary R Hook */ 86ea0375afSGary R Hook cmd_q->free_slots--; 87ea0375afSGary R Hook 88ea0375afSGary R Hook cr0 = (cmd_q->id << REQ0_CMD_Q_SHIFT) 89ea0375afSGary R Hook | (op->jobid << REQ0_JOBID_SHIFT) 90ea0375afSGary R Hook | REQ0_WAIT_FOR_WRITE; 91ea0375afSGary R Hook 92ea0375afSGary R Hook if (op->soc) 93ea0375afSGary R Hook cr0 |= REQ0_STOP_ON_COMPLETE 94ea0375afSGary R Hook | REQ0_INT_ON_COMPLETE; 95ea0375afSGary R Hook 96ea0375afSGary R Hook if (op->ioc || !cmd_q->free_slots) 97ea0375afSGary R Hook cr0 |= REQ0_INT_ON_COMPLETE; 98ea0375afSGary R Hook 99ea0375afSGary R Hook /* Start at CMD_REQ1 */ 100ea0375afSGary R Hook cr_addr = ccp->io_regs + CMD_REQ0 + CMD_REQ_INCR; 101ea0375afSGary R Hook 102ea0375afSGary R Hook mutex_lock(&ccp->req_mutex); 103ea0375afSGary R Hook 104ea0375afSGary R Hook /* Write CMD_REQ1 through CMD_REQx first */ 105ea0375afSGary R Hook for (i = 0; i < cr_count; i++, cr_addr += CMD_REQ_INCR) 106ea0375afSGary R Hook iowrite32(*(cr + i), cr_addr); 107ea0375afSGary R Hook 108ea0375afSGary R Hook /* Tell the CCP to start */ 109ea0375afSGary R Hook wmb(); 110ea0375afSGary R Hook iowrite32(cr0, ccp->io_regs + CMD_REQ0); 111ea0375afSGary R Hook 112ea0375afSGary R Hook mutex_unlock(&ccp->req_mutex); 113ea0375afSGary R Hook 114ea0375afSGary R Hook if (cr0 & REQ0_INT_ON_COMPLETE) { 115ea0375afSGary R Hook /* Wait for the job to complete */ 116ea0375afSGary R Hook ret = wait_event_interruptible(cmd_q->int_queue, 117ea0375afSGary R Hook cmd_q->int_rcvd); 118ea0375afSGary R Hook if (ret || cmd_q->cmd_error) { 119ea0375afSGary R Hook /* On error delete all related jobs from the queue */ 120ea0375afSGary R Hook cmd = (cmd_q->id << DEL_Q_ID_SHIFT) 121ea0375afSGary R Hook | op->jobid; 122ea0375afSGary R Hook 123ea0375afSGary R Hook iowrite32(cmd, ccp->io_regs + DEL_CMD_Q_JOB); 124ea0375afSGary R Hook 125ea0375afSGary R Hook if (!ret) 126ea0375afSGary R Hook ret = -EIO; 127ea0375afSGary R Hook } else if (op->soc) { 128ea0375afSGary R Hook /* Delete just head job from the queue on SoC */ 129ea0375afSGary R Hook cmd = DEL_Q_ACTIVE 130ea0375afSGary R Hook | (cmd_q->id << DEL_Q_ID_SHIFT) 131ea0375afSGary R Hook | op->jobid; 132ea0375afSGary R Hook 133ea0375afSGary R Hook iowrite32(cmd, ccp->io_regs + DEL_CMD_Q_JOB); 134ea0375afSGary R Hook } 135ea0375afSGary R Hook 136ea0375afSGary R Hook cmd_q->free_slots = CMD_Q_DEPTH(cmd_q->q_status); 137ea0375afSGary R Hook 138ea0375afSGary R Hook cmd_q->int_rcvd = 0; 139ea0375afSGary R Hook } 140ea0375afSGary R Hook 141ea0375afSGary R Hook return ret; 142ea0375afSGary R Hook } 143ea0375afSGary R Hook 144ea0375afSGary R Hook static int ccp_perform_aes(struct ccp_op *op) 145ea0375afSGary R Hook { 146ea0375afSGary R Hook u32 cr[6]; 147ea0375afSGary R Hook 148ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 149ea0375afSGary R Hook cr[0] = (CCP_ENGINE_AES << REQ1_ENGINE_SHIFT) 150ea0375afSGary R Hook | (op->u.aes.type << REQ1_AES_TYPE_SHIFT) 151ea0375afSGary R Hook | (op->u.aes.mode << REQ1_AES_MODE_SHIFT) 152ea0375afSGary R Hook | (op->u.aes.action << REQ1_AES_ACTION_SHIFT) 153956ee21aSGary R Hook | (op->sb_key << REQ1_KEY_KSB_SHIFT); 154ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 155ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 156956ee21aSGary R Hook cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT) 157ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 158ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 159ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 160ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 161ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 162ea0375afSGary R Hook 163ea0375afSGary R Hook if (op->u.aes.mode == CCP_AES_MODE_CFB) 164ea0375afSGary R Hook cr[0] |= ((0x7f) << REQ1_AES_CFB_SIZE_SHIFT); 165ea0375afSGary R Hook 166ea0375afSGary R Hook if (op->eom) 167ea0375afSGary R Hook cr[0] |= REQ1_EOM; 168ea0375afSGary R Hook 169ea0375afSGary R Hook if (op->init) 170ea0375afSGary R Hook cr[0] |= REQ1_INIT; 171ea0375afSGary R Hook 172ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 173ea0375afSGary R Hook } 174ea0375afSGary R Hook 175ea0375afSGary R Hook static int ccp_perform_xts_aes(struct ccp_op *op) 176ea0375afSGary R Hook { 177ea0375afSGary R Hook u32 cr[6]; 178ea0375afSGary R Hook 179ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 180ea0375afSGary R Hook cr[0] = (CCP_ENGINE_XTS_AES_128 << REQ1_ENGINE_SHIFT) 181ea0375afSGary R Hook | (op->u.xts.action << REQ1_AES_ACTION_SHIFT) 182ea0375afSGary R Hook | (op->u.xts.unit_size << REQ1_XTS_AES_SIZE_SHIFT) 183956ee21aSGary R Hook | (op->sb_key << REQ1_KEY_KSB_SHIFT); 184ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 185ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 186956ee21aSGary R Hook cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT) 187ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 188ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 189ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 190ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 191ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 192ea0375afSGary R Hook 193ea0375afSGary R Hook if (op->eom) 194ea0375afSGary R Hook cr[0] |= REQ1_EOM; 195ea0375afSGary R Hook 196ea0375afSGary R Hook if (op->init) 197ea0375afSGary R Hook cr[0] |= REQ1_INIT; 198ea0375afSGary R Hook 199ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 200ea0375afSGary R Hook } 201ea0375afSGary R Hook 202ea0375afSGary R Hook static int ccp_perform_sha(struct ccp_op *op) 203ea0375afSGary R Hook { 204ea0375afSGary R Hook u32 cr[6]; 205ea0375afSGary R Hook 206ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 207ea0375afSGary R Hook cr[0] = (CCP_ENGINE_SHA << REQ1_ENGINE_SHIFT) 208ea0375afSGary R Hook | (op->u.sha.type << REQ1_SHA_TYPE_SHIFT) 209ea0375afSGary R Hook | REQ1_INIT; 210ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 211ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 212956ee21aSGary R Hook cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT) 213ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 214ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 215ea0375afSGary R Hook 216ea0375afSGary R Hook if (op->eom) { 217ea0375afSGary R Hook cr[0] |= REQ1_EOM; 218ea0375afSGary R Hook cr[4] = lower_32_bits(op->u.sha.msg_bits); 219ea0375afSGary R Hook cr[5] = upper_32_bits(op->u.sha.msg_bits); 220ea0375afSGary R Hook } else { 221ea0375afSGary R Hook cr[4] = 0; 222ea0375afSGary R Hook cr[5] = 0; 223ea0375afSGary R Hook } 224ea0375afSGary R Hook 225ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 226ea0375afSGary R Hook } 227ea0375afSGary R Hook 228ea0375afSGary R Hook static int ccp_perform_rsa(struct ccp_op *op) 229ea0375afSGary R Hook { 230ea0375afSGary R Hook u32 cr[6]; 231ea0375afSGary R Hook 232ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 233ea0375afSGary R Hook cr[0] = (CCP_ENGINE_RSA << REQ1_ENGINE_SHIFT) 234ea0375afSGary R Hook | (op->u.rsa.mod_size << REQ1_RSA_MOD_SIZE_SHIFT) 235956ee21aSGary R Hook | (op->sb_key << REQ1_KEY_KSB_SHIFT) 236ea0375afSGary R Hook | REQ1_EOM; 237ea0375afSGary R Hook cr[1] = op->u.rsa.input_len - 1; 238ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 239956ee21aSGary R Hook cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT) 240ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 241ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 242ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 243ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 244ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 245ea0375afSGary R Hook 246ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 247ea0375afSGary R Hook } 248ea0375afSGary R Hook 249ea0375afSGary R Hook static int ccp_perform_passthru(struct ccp_op *op) 250ea0375afSGary R Hook { 251ea0375afSGary R Hook u32 cr[6]; 252ea0375afSGary R Hook 253ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 254ea0375afSGary R Hook cr[0] = (CCP_ENGINE_PASSTHRU << REQ1_ENGINE_SHIFT) 255ea0375afSGary R Hook | (op->u.passthru.bit_mod << REQ1_PT_BW_SHIFT) 256ea0375afSGary R Hook | (op->u.passthru.byte_swap << REQ1_PT_BS_SHIFT); 257ea0375afSGary R Hook 258ea0375afSGary R Hook if (op->src.type == CCP_MEMTYPE_SYSTEM) 259ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 260ea0375afSGary R Hook else 261ea0375afSGary R Hook cr[1] = op->dst.u.dma.length - 1; 262ea0375afSGary R Hook 263ea0375afSGary R Hook if (op->src.type == CCP_MEMTYPE_SYSTEM) { 264ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 265ea0375afSGary R Hook cr[3] = (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 266ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 267ea0375afSGary R Hook 268ea0375afSGary R Hook if (op->u.passthru.bit_mod != CCP_PASSTHRU_BITWISE_NOOP) 269956ee21aSGary R Hook cr[3] |= (op->sb_key << REQ4_KSB_SHIFT); 270ea0375afSGary R Hook } else { 271956ee21aSGary R Hook cr[2] = op->src.u.sb * CCP_SB_BYTES; 272956ee21aSGary R Hook cr[3] = (CCP_MEMTYPE_SB << REQ4_MEMTYPE_SHIFT); 273ea0375afSGary R Hook } 274ea0375afSGary R Hook 275ea0375afSGary R Hook if (op->dst.type == CCP_MEMTYPE_SYSTEM) { 276ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 277ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 278ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 279ea0375afSGary R Hook } else { 280956ee21aSGary R Hook cr[4] = op->dst.u.sb * CCP_SB_BYTES; 281956ee21aSGary R Hook cr[5] = (CCP_MEMTYPE_SB << REQ6_MEMTYPE_SHIFT); 282ea0375afSGary R Hook } 283ea0375afSGary R Hook 284ea0375afSGary R Hook if (op->eom) 285ea0375afSGary R Hook cr[0] |= REQ1_EOM; 286ea0375afSGary R Hook 287ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 288ea0375afSGary R Hook } 289ea0375afSGary R Hook 290ea0375afSGary R Hook static int ccp_perform_ecc(struct ccp_op *op) 291ea0375afSGary R Hook { 292ea0375afSGary R Hook u32 cr[6]; 293ea0375afSGary R Hook 294ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 295ea0375afSGary R Hook cr[0] = REQ1_ECC_AFFINE_CONVERT 296ea0375afSGary R Hook | (CCP_ENGINE_ECC << REQ1_ENGINE_SHIFT) 297ea0375afSGary R Hook | (op->u.ecc.function << REQ1_ECC_FUNCTION_SHIFT) 298ea0375afSGary R Hook | REQ1_EOM; 299ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 300ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 301ea0375afSGary R Hook cr[3] = (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 302ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 303ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 304ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 305ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 306ea0375afSGary R Hook 307ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 308ea0375afSGary R Hook } 309ea0375afSGary R Hook 310ea0375afSGary R Hook static int ccp_trng_read(struct hwrng *rng, void *data, size_t max, bool wait) 311ea0375afSGary R Hook { 312ea0375afSGary R Hook struct ccp_device *ccp = container_of(rng, struct ccp_device, hwrng); 313ea0375afSGary R Hook u32 trng_value; 314ea0375afSGary R Hook int len = min_t(int, sizeof(trng_value), max); 315ea0375afSGary R Hook 316ea0375afSGary R Hook /* 317ea0375afSGary R Hook * Locking is provided by the caller so we can update device 318ea0375afSGary R Hook * hwrng-related fields safely 319ea0375afSGary R Hook */ 320ea0375afSGary R Hook trng_value = ioread32(ccp->io_regs + TRNG_OUT_REG); 321ea0375afSGary R Hook if (!trng_value) { 322ea0375afSGary R Hook /* Zero is returned if not data is available or if a 323ea0375afSGary R Hook * bad-entropy error is present. Assume an error if 324ea0375afSGary R Hook * we exceed TRNG_RETRIES reads of zero. 325ea0375afSGary R Hook */ 326ea0375afSGary R Hook if (ccp->hwrng_retries++ > TRNG_RETRIES) 327ea0375afSGary R Hook return -EIO; 328ea0375afSGary R Hook 329ea0375afSGary R Hook return 0; 330ea0375afSGary R Hook } 331ea0375afSGary R Hook 332ea0375afSGary R Hook /* Reset the counter and save the rng value */ 333ea0375afSGary R Hook ccp->hwrng_retries = 0; 334ea0375afSGary R Hook memcpy(data, &trng_value, len); 335ea0375afSGary R Hook 336ea0375afSGary R Hook return len; 337ea0375afSGary R Hook } 338ea0375afSGary R Hook 339ea0375afSGary R Hook static int ccp_init(struct ccp_device *ccp) 340ea0375afSGary R Hook { 341ea0375afSGary R Hook struct device *dev = ccp->dev; 342ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 343ea0375afSGary R Hook struct dma_pool *dma_pool; 344ea0375afSGary R Hook char dma_pool_name[MAX_DMAPOOL_NAME_LEN]; 345ea0375afSGary R Hook unsigned int qmr, qim, i; 346ea0375afSGary R Hook int ret; 347ea0375afSGary R Hook 348ea0375afSGary R Hook /* Find available queues */ 349ea0375afSGary R Hook qim = 0; 350ea0375afSGary R Hook qmr = ioread32(ccp->io_regs + Q_MASK_REG); 351ea0375afSGary R Hook for (i = 0; i < MAX_HW_QUEUES; i++) { 352ea0375afSGary R Hook if (!(qmr & (1 << i))) 353ea0375afSGary R Hook continue; 354ea0375afSGary R Hook 355ea0375afSGary R Hook /* Allocate a dma pool for this queue */ 356ea0375afSGary R Hook snprintf(dma_pool_name, sizeof(dma_pool_name), "%s_q%d", 357ea0375afSGary R Hook ccp->name, i); 358ea0375afSGary R Hook dma_pool = dma_pool_create(dma_pool_name, dev, 359ea0375afSGary R Hook CCP_DMAPOOL_MAX_SIZE, 360ea0375afSGary R Hook CCP_DMAPOOL_ALIGN, 0); 361ea0375afSGary R Hook if (!dma_pool) { 362ea0375afSGary R Hook dev_err(dev, "unable to allocate dma pool\n"); 363ea0375afSGary R Hook ret = -ENOMEM; 364ea0375afSGary R Hook goto e_pool; 365ea0375afSGary R Hook } 366ea0375afSGary R Hook 367ea0375afSGary R Hook cmd_q = &ccp->cmd_q[ccp->cmd_q_count]; 368ea0375afSGary R Hook ccp->cmd_q_count++; 369ea0375afSGary R Hook 370ea0375afSGary R Hook cmd_q->ccp = ccp; 371ea0375afSGary R Hook cmd_q->id = i; 372ea0375afSGary R Hook cmd_q->dma_pool = dma_pool; 373ea0375afSGary R Hook 374ea0375afSGary R Hook /* Reserve 2 KSB regions for the queue */ 375956ee21aSGary R Hook cmd_q->sb_key = KSB_START + ccp->sb_start++; 376956ee21aSGary R Hook cmd_q->sb_ctx = KSB_START + ccp->sb_start++; 377956ee21aSGary R Hook ccp->sb_count -= 2; 378ea0375afSGary R Hook 379ea0375afSGary R Hook /* Preset some register values and masks that are queue 380ea0375afSGary R Hook * number dependent 381ea0375afSGary R Hook */ 382ea0375afSGary R Hook cmd_q->reg_status = ccp->io_regs + CMD_Q_STATUS_BASE + 383ea0375afSGary R Hook (CMD_Q_STATUS_INCR * i); 384ea0375afSGary R Hook cmd_q->reg_int_status = ccp->io_regs + CMD_Q_INT_STATUS_BASE + 385ea0375afSGary R Hook (CMD_Q_STATUS_INCR * i); 386ea0375afSGary R Hook cmd_q->int_ok = 1 << (i * 2); 387ea0375afSGary R Hook cmd_q->int_err = 1 << ((i * 2) + 1); 388ea0375afSGary R Hook 389ea0375afSGary R Hook cmd_q->free_slots = CMD_Q_DEPTH(ioread32(cmd_q->reg_status)); 390ea0375afSGary R Hook 391ea0375afSGary R Hook init_waitqueue_head(&cmd_q->int_queue); 392ea0375afSGary R Hook 393ea0375afSGary R Hook /* Build queue interrupt mask (two interrupts per queue) */ 394ea0375afSGary R Hook qim |= cmd_q->int_ok | cmd_q->int_err; 395ea0375afSGary R Hook 396ea0375afSGary R Hook #ifdef CONFIG_ARM64 397ea0375afSGary R Hook /* For arm64 set the recommended queue cache settings */ 398ea0375afSGary R Hook iowrite32(ccp->axcache, ccp->io_regs + CMD_Q_CACHE_BASE + 399ea0375afSGary R Hook (CMD_Q_CACHE_INC * i)); 400ea0375afSGary R Hook #endif 401ea0375afSGary R Hook 402ea0375afSGary R Hook dev_dbg(dev, "queue #%u available\n", i); 403ea0375afSGary R Hook } 404ea0375afSGary R Hook if (ccp->cmd_q_count == 0) { 405ea0375afSGary R Hook dev_notice(dev, "no command queues available\n"); 406ea0375afSGary R Hook ret = -EIO; 407ea0375afSGary R Hook goto e_pool; 408ea0375afSGary R Hook } 409ea0375afSGary R Hook dev_notice(dev, "%u command queues available\n", ccp->cmd_q_count); 410ea0375afSGary R Hook 411ea0375afSGary R Hook /* Disable and clear interrupts until ready */ 412ea0375afSGary R Hook iowrite32(0x00, ccp->io_regs + IRQ_MASK_REG); 413ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 414ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 415ea0375afSGary R Hook 416ea0375afSGary R Hook ioread32(cmd_q->reg_int_status); 417ea0375afSGary R Hook ioread32(cmd_q->reg_status); 418ea0375afSGary R Hook } 419ea0375afSGary R Hook iowrite32(qim, ccp->io_regs + IRQ_STATUS_REG); 420ea0375afSGary R Hook 421ea0375afSGary R Hook /* Request an irq */ 422ea0375afSGary R Hook ret = ccp->get_irq(ccp); 423ea0375afSGary R Hook if (ret) { 424ea0375afSGary R Hook dev_err(dev, "unable to allocate an IRQ\n"); 425ea0375afSGary R Hook goto e_pool; 426ea0375afSGary R Hook } 427ea0375afSGary R Hook 428ea0375afSGary R Hook /* Initialize the queues used to wait for KSB space and suspend */ 429956ee21aSGary R Hook init_waitqueue_head(&ccp->sb_queue); 430ea0375afSGary R Hook init_waitqueue_head(&ccp->suspend_queue); 431ea0375afSGary R Hook 432ea0375afSGary R Hook /* Create a kthread for each queue */ 433ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 434ea0375afSGary R Hook struct task_struct *kthread; 435ea0375afSGary R Hook 436ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 437ea0375afSGary R Hook 438ea0375afSGary R Hook kthread = kthread_create(ccp_cmd_queue_thread, cmd_q, 439ea0375afSGary R Hook "%s-q%u", ccp->name, cmd_q->id); 440ea0375afSGary R Hook if (IS_ERR(kthread)) { 441ea0375afSGary R Hook dev_err(dev, "error creating queue thread (%ld)\n", 442ea0375afSGary R Hook PTR_ERR(kthread)); 443ea0375afSGary R Hook ret = PTR_ERR(kthread); 444ea0375afSGary R Hook goto e_kthread; 445ea0375afSGary R Hook } 446ea0375afSGary R Hook 447ea0375afSGary R Hook cmd_q->kthread = kthread; 448ea0375afSGary R Hook wake_up_process(kthread); 449ea0375afSGary R Hook } 450ea0375afSGary R Hook 451ea0375afSGary R Hook /* Register the RNG */ 452ea0375afSGary R Hook ccp->hwrng.name = ccp->rngname; 453ea0375afSGary R Hook ccp->hwrng.read = ccp_trng_read; 454ea0375afSGary R Hook ret = hwrng_register(&ccp->hwrng); 455ea0375afSGary R Hook if (ret) { 456ea0375afSGary R Hook dev_err(dev, "error registering hwrng (%d)\n", ret); 457ea0375afSGary R Hook goto e_kthread; 458ea0375afSGary R Hook } 459ea0375afSGary R Hook 46058ea8abfSGary R Hook /* Register the DMA engine support */ 46158ea8abfSGary R Hook ret = ccp_dmaengine_register(ccp); 46258ea8abfSGary R Hook if (ret) 46358ea8abfSGary R Hook goto e_hwrng; 46458ea8abfSGary R Hook 465ea0375afSGary R Hook ccp_add_device(ccp); 466ea0375afSGary R Hook 467ea0375afSGary R Hook /* Enable interrupts */ 468ea0375afSGary R Hook iowrite32(qim, ccp->io_regs + IRQ_MASK_REG); 469ea0375afSGary R Hook 470ea0375afSGary R Hook return 0; 471ea0375afSGary R Hook 47258ea8abfSGary R Hook e_hwrng: 47358ea8abfSGary R Hook hwrng_unregister(&ccp->hwrng); 47458ea8abfSGary R Hook 475ea0375afSGary R Hook e_kthread: 476ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 477ea0375afSGary R Hook if (ccp->cmd_q[i].kthread) 478ea0375afSGary R Hook kthread_stop(ccp->cmd_q[i].kthread); 479ea0375afSGary R Hook 480ea0375afSGary R Hook ccp->free_irq(ccp); 481ea0375afSGary R Hook 482ea0375afSGary R Hook e_pool: 483ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 484ea0375afSGary R Hook dma_pool_destroy(ccp->cmd_q[i].dma_pool); 485ea0375afSGary R Hook 486ea0375afSGary R Hook return ret; 487ea0375afSGary R Hook } 488ea0375afSGary R Hook 489ea0375afSGary R Hook static void ccp_destroy(struct ccp_device *ccp) 490ea0375afSGary R Hook { 491ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 492ea0375afSGary R Hook struct ccp_cmd *cmd; 493ea0375afSGary R Hook unsigned int qim, i; 494ea0375afSGary R Hook 495ea0375afSGary R Hook /* Remove this device from the list of available units first */ 496ea0375afSGary R Hook ccp_del_device(ccp); 497ea0375afSGary R Hook 49858ea8abfSGary R Hook /* Unregister the DMA engine */ 49958ea8abfSGary R Hook ccp_dmaengine_unregister(ccp); 50058ea8abfSGary R Hook 501ea0375afSGary R Hook /* Unregister the RNG */ 502ea0375afSGary R Hook hwrng_unregister(&ccp->hwrng); 503ea0375afSGary R Hook 504ea0375afSGary R Hook /* Stop the queue kthreads */ 505ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 506ea0375afSGary R Hook if (ccp->cmd_q[i].kthread) 507ea0375afSGary R Hook kthread_stop(ccp->cmd_q[i].kthread); 508ea0375afSGary R Hook 509ea0375afSGary R Hook /* Build queue interrupt mask (two interrupt masks per queue) */ 510ea0375afSGary R Hook qim = 0; 511ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 512ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 513ea0375afSGary R Hook qim |= cmd_q->int_ok | cmd_q->int_err; 514ea0375afSGary R Hook } 515ea0375afSGary R Hook 516ea0375afSGary R Hook /* Disable and clear interrupts */ 517ea0375afSGary R Hook iowrite32(0x00, ccp->io_regs + IRQ_MASK_REG); 518ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 519ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 520ea0375afSGary R Hook 521ea0375afSGary R Hook ioread32(cmd_q->reg_int_status); 522ea0375afSGary R Hook ioread32(cmd_q->reg_status); 523ea0375afSGary R Hook } 524ea0375afSGary R Hook iowrite32(qim, ccp->io_regs + IRQ_STATUS_REG); 525ea0375afSGary R Hook 526ea0375afSGary R Hook ccp->free_irq(ccp); 527ea0375afSGary R Hook 528ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 529ea0375afSGary R Hook dma_pool_destroy(ccp->cmd_q[i].dma_pool); 530ea0375afSGary R Hook 531ea0375afSGary R Hook /* Flush the cmd and backlog queue */ 532ea0375afSGary R Hook while (!list_empty(&ccp->cmd)) { 533ea0375afSGary R Hook /* Invoke the callback directly with an error code */ 534ea0375afSGary R Hook cmd = list_first_entry(&ccp->cmd, struct ccp_cmd, entry); 535ea0375afSGary R Hook list_del(&cmd->entry); 536ea0375afSGary R Hook cmd->callback(cmd->data, -ENODEV); 537ea0375afSGary R Hook } 538ea0375afSGary R Hook while (!list_empty(&ccp->backlog)) { 539ea0375afSGary R Hook /* Invoke the callback directly with an error code */ 540ea0375afSGary R Hook cmd = list_first_entry(&ccp->backlog, struct ccp_cmd, entry); 541ea0375afSGary R Hook list_del(&cmd->entry); 542ea0375afSGary R Hook cmd->callback(cmd->data, -ENODEV); 543ea0375afSGary R Hook } 544ea0375afSGary R Hook } 545ea0375afSGary R Hook 546ea0375afSGary R Hook static irqreturn_t ccp_irq_handler(int irq, void *data) 547ea0375afSGary R Hook { 548ea0375afSGary R Hook struct device *dev = data; 549ea0375afSGary R Hook struct ccp_device *ccp = dev_get_drvdata(dev); 550ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 551ea0375afSGary R Hook u32 q_int, status; 552ea0375afSGary R Hook unsigned int i; 553ea0375afSGary R Hook 554ea0375afSGary R Hook status = ioread32(ccp->io_regs + IRQ_STATUS_REG); 555ea0375afSGary R Hook 556ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 557ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 558ea0375afSGary R Hook 559ea0375afSGary R Hook q_int = status & (cmd_q->int_ok | cmd_q->int_err); 560ea0375afSGary R Hook if (q_int) { 561ea0375afSGary R Hook cmd_q->int_status = status; 562ea0375afSGary R Hook cmd_q->q_status = ioread32(cmd_q->reg_status); 563ea0375afSGary R Hook cmd_q->q_int_status = ioread32(cmd_q->reg_int_status); 564ea0375afSGary R Hook 565ea0375afSGary R Hook /* On error, only save the first error value */ 566ea0375afSGary R Hook if ((q_int & cmd_q->int_err) && !cmd_q->cmd_error) 567ea0375afSGary R Hook cmd_q->cmd_error = CMD_Q_ERROR(cmd_q->q_status); 568ea0375afSGary R Hook 569ea0375afSGary R Hook cmd_q->int_rcvd = 1; 570ea0375afSGary R Hook 571ea0375afSGary R Hook /* Acknowledge the interrupt and wake the kthread */ 572ea0375afSGary R Hook iowrite32(q_int, ccp->io_regs + IRQ_STATUS_REG); 573ea0375afSGary R Hook wake_up_interruptible(&cmd_q->int_queue); 574ea0375afSGary R Hook } 575ea0375afSGary R Hook } 576ea0375afSGary R Hook 577ea0375afSGary R Hook return IRQ_HANDLED; 578ea0375afSGary R Hook } 579ea0375afSGary R Hook 580bc197b2aSJulia Lawall static const struct ccp_actions ccp3_actions = { 581a43eb985SGary R Hook .aes = ccp_perform_aes, 582a43eb985SGary R Hook .xts_aes = ccp_perform_xts_aes, 583a43eb985SGary R Hook .sha = ccp_perform_sha, 584a43eb985SGary R Hook .rsa = ccp_perform_rsa, 585a43eb985SGary R Hook .passthru = ccp_perform_passthru, 586a43eb985SGary R Hook .ecc = ccp_perform_ecc, 587*58a690b7SGary R Hook .sballoc = ccp_alloc_ksb, 588*58a690b7SGary R Hook .sbfree = ccp_free_ksb, 589ea0375afSGary R Hook .init = ccp_init, 590ea0375afSGary R Hook .destroy = ccp_destroy, 591ea0375afSGary R Hook .irqhandler = ccp_irq_handler, 592ea0375afSGary R Hook }; 593ea0375afSGary R Hook 594ea0375afSGary R Hook struct ccp_vdata ccpv3 = { 595ea0375afSGary R Hook .version = CCP_VERSION(3, 0), 596ea0375afSGary R Hook .perform = &ccp3_actions, 597fba8855cSGary R Hook .bar = 2, 598fba8855cSGary R Hook .offset = 0x20000, 599ea0375afSGary R Hook }; 600