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 2358a690b7SGary R Hook static u32 ccp_alloc_ksb(struct ccp_cmd_queue *cmd_q, unsigned int count) 2458a690b7SGary R Hook { 2558a690b7SGary R Hook int start; 2658a690b7SGary R Hook struct ccp_device *ccp = cmd_q->ccp; 2758a690b7SGary R Hook 2858a690b7SGary R Hook for (;;) { 2958a690b7SGary R Hook mutex_lock(&ccp->sb_mutex); 3058a690b7SGary R Hook 3158a690b7SGary R Hook start = (u32)bitmap_find_next_zero_area(ccp->sb, 3258a690b7SGary R Hook ccp->sb_count, 3358a690b7SGary R Hook ccp->sb_start, 3458a690b7SGary R Hook count, 0); 3558a690b7SGary R Hook if (start <= ccp->sb_count) { 3658a690b7SGary R Hook bitmap_set(ccp->sb, start, count); 3758a690b7SGary R Hook 3858a690b7SGary R Hook mutex_unlock(&ccp->sb_mutex); 3958a690b7SGary R Hook break; 4058a690b7SGary R Hook } 4158a690b7SGary R Hook 4258a690b7SGary R Hook ccp->sb_avail = 0; 4358a690b7SGary R Hook 4458a690b7SGary R Hook mutex_unlock(&ccp->sb_mutex); 4558a690b7SGary R Hook 4658a690b7SGary R Hook /* Wait for KSB entries to become available */ 4758a690b7SGary R Hook if (wait_event_interruptible(ccp->sb_queue, ccp->sb_avail)) 4858a690b7SGary R Hook return 0; 4958a690b7SGary R Hook } 5058a690b7SGary R Hook 5158a690b7SGary R Hook return KSB_START + start; 5258a690b7SGary R Hook } 5358a690b7SGary R Hook 5458a690b7SGary R Hook static void ccp_free_ksb(struct ccp_cmd_queue *cmd_q, unsigned int start, 5558a690b7SGary R Hook unsigned int count) 5658a690b7SGary R Hook { 5758a690b7SGary R Hook struct ccp_device *ccp = cmd_q->ccp; 5858a690b7SGary R Hook 5958a690b7SGary R Hook if (!start) 6058a690b7SGary R Hook return; 6158a690b7SGary R Hook 6258a690b7SGary R Hook mutex_lock(&ccp->sb_mutex); 6358a690b7SGary R Hook 6458a690b7SGary R Hook bitmap_clear(ccp->sb, start - KSB_START, count); 6558a690b7SGary R Hook 6658a690b7SGary R Hook ccp->sb_avail = 1; 6758a690b7SGary R Hook 6858a690b7SGary R Hook mutex_unlock(&ccp->sb_mutex); 6958a690b7SGary R Hook 7058a690b7SGary R Hook wake_up_interruptible_all(&ccp->sb_queue); 7158a690b7SGary R Hook } 7258a690b7SGary R Hook 73bb4e89b3SGary R Hook static unsigned int ccp_get_free_slots(struct ccp_cmd_queue *cmd_q) 74bb4e89b3SGary R Hook { 75bb4e89b3SGary R Hook return CMD_Q_DEPTH(ioread32(cmd_q->reg_status)); 76bb4e89b3SGary R Hook } 77bb4e89b3SGary R Hook 78ea0375afSGary R Hook static int ccp_do_cmd(struct ccp_op *op, u32 *cr, unsigned int cr_count) 79ea0375afSGary R Hook { 80ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q = op->cmd_q; 81ea0375afSGary R Hook struct ccp_device *ccp = cmd_q->ccp; 82ea0375afSGary R Hook void __iomem *cr_addr; 83ea0375afSGary R Hook u32 cr0, cmd; 84ea0375afSGary R Hook unsigned int i; 85ea0375afSGary R Hook int ret = 0; 86ea0375afSGary R Hook 87ea0375afSGary R Hook /* We could read a status register to see how many free slots 88ea0375afSGary R Hook * are actually available, but reading that register resets it 89ea0375afSGary R Hook * and you could lose some error information. 90ea0375afSGary R Hook */ 91ea0375afSGary R Hook cmd_q->free_slots--; 92ea0375afSGary R Hook 93ea0375afSGary R Hook cr0 = (cmd_q->id << REQ0_CMD_Q_SHIFT) 94ea0375afSGary R Hook | (op->jobid << REQ0_JOBID_SHIFT) 95ea0375afSGary R Hook | REQ0_WAIT_FOR_WRITE; 96ea0375afSGary R Hook 97ea0375afSGary R Hook if (op->soc) 98ea0375afSGary R Hook cr0 |= REQ0_STOP_ON_COMPLETE 99ea0375afSGary R Hook | REQ0_INT_ON_COMPLETE; 100ea0375afSGary R Hook 101ea0375afSGary R Hook if (op->ioc || !cmd_q->free_slots) 102ea0375afSGary R Hook cr0 |= REQ0_INT_ON_COMPLETE; 103ea0375afSGary R Hook 104ea0375afSGary R Hook /* Start at CMD_REQ1 */ 105ea0375afSGary R Hook cr_addr = ccp->io_regs + CMD_REQ0 + CMD_REQ_INCR; 106ea0375afSGary R Hook 107ea0375afSGary R Hook mutex_lock(&ccp->req_mutex); 108ea0375afSGary R Hook 109ea0375afSGary R Hook /* Write CMD_REQ1 through CMD_REQx first */ 110ea0375afSGary R Hook for (i = 0; i < cr_count; i++, cr_addr += CMD_REQ_INCR) 111ea0375afSGary R Hook iowrite32(*(cr + i), cr_addr); 112ea0375afSGary R Hook 113ea0375afSGary R Hook /* Tell the CCP to start */ 114ea0375afSGary R Hook wmb(); 115ea0375afSGary R Hook iowrite32(cr0, ccp->io_regs + CMD_REQ0); 116ea0375afSGary R Hook 117ea0375afSGary R Hook mutex_unlock(&ccp->req_mutex); 118ea0375afSGary R Hook 119ea0375afSGary R Hook if (cr0 & REQ0_INT_ON_COMPLETE) { 120ea0375afSGary R Hook /* Wait for the job to complete */ 121ea0375afSGary R Hook ret = wait_event_interruptible(cmd_q->int_queue, 122ea0375afSGary R Hook cmd_q->int_rcvd); 123ea0375afSGary R Hook if (ret || cmd_q->cmd_error) { 124ea0375afSGary R Hook /* On error delete all related jobs from the queue */ 125ea0375afSGary R Hook cmd = (cmd_q->id << DEL_Q_ID_SHIFT) 126ea0375afSGary R Hook | op->jobid; 127ea0375afSGary R Hook 128ea0375afSGary R Hook iowrite32(cmd, ccp->io_regs + DEL_CMD_Q_JOB); 129ea0375afSGary R Hook 130ea0375afSGary R Hook if (!ret) 131ea0375afSGary R Hook ret = -EIO; 132ea0375afSGary R Hook } else if (op->soc) { 133ea0375afSGary R Hook /* Delete just head job from the queue on SoC */ 134ea0375afSGary R Hook cmd = DEL_Q_ACTIVE 135ea0375afSGary R Hook | (cmd_q->id << DEL_Q_ID_SHIFT) 136ea0375afSGary R Hook | op->jobid; 137ea0375afSGary R Hook 138ea0375afSGary R Hook iowrite32(cmd, ccp->io_regs + DEL_CMD_Q_JOB); 139ea0375afSGary R Hook } 140ea0375afSGary R Hook 141ea0375afSGary R Hook cmd_q->free_slots = CMD_Q_DEPTH(cmd_q->q_status); 142ea0375afSGary R Hook 143ea0375afSGary R Hook cmd_q->int_rcvd = 0; 144ea0375afSGary R Hook } 145ea0375afSGary R Hook 146ea0375afSGary R Hook return ret; 147ea0375afSGary R Hook } 148ea0375afSGary R Hook 149ea0375afSGary R Hook static int ccp_perform_aes(struct ccp_op *op) 150ea0375afSGary R Hook { 151ea0375afSGary R Hook u32 cr[6]; 152ea0375afSGary R Hook 153ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 154ea0375afSGary R Hook cr[0] = (CCP_ENGINE_AES << REQ1_ENGINE_SHIFT) 155ea0375afSGary R Hook | (op->u.aes.type << REQ1_AES_TYPE_SHIFT) 156ea0375afSGary R Hook | (op->u.aes.mode << REQ1_AES_MODE_SHIFT) 157ea0375afSGary R Hook | (op->u.aes.action << REQ1_AES_ACTION_SHIFT) 158956ee21aSGary R Hook | (op->sb_key << REQ1_KEY_KSB_SHIFT); 159ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 160ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 161956ee21aSGary R Hook cr[3] = (op->sb_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 cr[4] = ccp_addr_lo(&op->dst.u.dma); 165ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 166ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 167ea0375afSGary R Hook 168ea0375afSGary R Hook if (op->u.aes.mode == CCP_AES_MODE_CFB) 169ea0375afSGary R Hook cr[0] |= ((0x7f) << REQ1_AES_CFB_SIZE_SHIFT); 170ea0375afSGary R Hook 171ea0375afSGary R Hook if (op->eom) 172ea0375afSGary R Hook cr[0] |= REQ1_EOM; 173ea0375afSGary R Hook 174ea0375afSGary R Hook if (op->init) 175ea0375afSGary R Hook cr[0] |= REQ1_INIT; 176ea0375afSGary R Hook 177ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 178ea0375afSGary R Hook } 179ea0375afSGary R Hook 180ea0375afSGary R Hook static int ccp_perform_xts_aes(struct ccp_op *op) 181ea0375afSGary R Hook { 182ea0375afSGary R Hook u32 cr[6]; 183ea0375afSGary R Hook 184ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 185ea0375afSGary R Hook cr[0] = (CCP_ENGINE_XTS_AES_128 << REQ1_ENGINE_SHIFT) 186ea0375afSGary R Hook | (op->u.xts.action << REQ1_AES_ACTION_SHIFT) 187ea0375afSGary R Hook | (op->u.xts.unit_size << REQ1_XTS_AES_SIZE_SHIFT) 188956ee21aSGary R Hook | (op->sb_key << REQ1_KEY_KSB_SHIFT); 189ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 190ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 191956ee21aSGary R Hook cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT) 192ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 193ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 194ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 195ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 196ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 197ea0375afSGary R Hook 198ea0375afSGary R Hook if (op->eom) 199ea0375afSGary R Hook cr[0] |= REQ1_EOM; 200ea0375afSGary R Hook 201ea0375afSGary R Hook if (op->init) 202ea0375afSGary R Hook cr[0] |= REQ1_INIT; 203ea0375afSGary R Hook 204ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 205ea0375afSGary R Hook } 206ea0375afSGary R Hook 207ea0375afSGary R Hook static int ccp_perform_sha(struct ccp_op *op) 208ea0375afSGary R Hook { 209ea0375afSGary R Hook u32 cr[6]; 210ea0375afSGary R Hook 211ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 212ea0375afSGary R Hook cr[0] = (CCP_ENGINE_SHA << REQ1_ENGINE_SHIFT) 213ea0375afSGary R Hook | (op->u.sha.type << REQ1_SHA_TYPE_SHIFT) 214ea0375afSGary R Hook | REQ1_INIT; 215ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 216ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 217956ee21aSGary R Hook cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT) 218ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 219ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 220ea0375afSGary R Hook 221ea0375afSGary R Hook if (op->eom) { 222ea0375afSGary R Hook cr[0] |= REQ1_EOM; 223ea0375afSGary R Hook cr[4] = lower_32_bits(op->u.sha.msg_bits); 224ea0375afSGary R Hook cr[5] = upper_32_bits(op->u.sha.msg_bits); 225ea0375afSGary R Hook } else { 226ea0375afSGary R Hook cr[4] = 0; 227ea0375afSGary R Hook cr[5] = 0; 228ea0375afSGary R Hook } 229ea0375afSGary R Hook 230ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 231ea0375afSGary R Hook } 232ea0375afSGary R Hook 233ea0375afSGary R Hook static int ccp_perform_rsa(struct ccp_op *op) 234ea0375afSGary R Hook { 235ea0375afSGary R Hook u32 cr[6]; 236ea0375afSGary R Hook 237ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 238ea0375afSGary R Hook cr[0] = (CCP_ENGINE_RSA << REQ1_ENGINE_SHIFT) 239ea0375afSGary R Hook | (op->u.rsa.mod_size << REQ1_RSA_MOD_SIZE_SHIFT) 240956ee21aSGary R Hook | (op->sb_key << REQ1_KEY_KSB_SHIFT) 241ea0375afSGary R Hook | REQ1_EOM; 242ea0375afSGary R Hook cr[1] = op->u.rsa.input_len - 1; 243ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 244956ee21aSGary R Hook cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT) 245ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 246ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 247ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 248ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 249ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 250ea0375afSGary R Hook 251ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 252ea0375afSGary R Hook } 253ea0375afSGary R Hook 254ea0375afSGary R Hook static int ccp_perform_passthru(struct ccp_op *op) 255ea0375afSGary R Hook { 256ea0375afSGary R Hook u32 cr[6]; 257ea0375afSGary R Hook 258ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 259ea0375afSGary R Hook cr[0] = (CCP_ENGINE_PASSTHRU << REQ1_ENGINE_SHIFT) 260ea0375afSGary R Hook | (op->u.passthru.bit_mod << REQ1_PT_BW_SHIFT) 261ea0375afSGary R Hook | (op->u.passthru.byte_swap << REQ1_PT_BS_SHIFT); 262ea0375afSGary R Hook 263ea0375afSGary R Hook if (op->src.type == CCP_MEMTYPE_SYSTEM) 264ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 265ea0375afSGary R Hook else 266ea0375afSGary R Hook cr[1] = op->dst.u.dma.length - 1; 267ea0375afSGary R Hook 268ea0375afSGary R Hook if (op->src.type == CCP_MEMTYPE_SYSTEM) { 269ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 270ea0375afSGary R Hook cr[3] = (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 271ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 272ea0375afSGary R Hook 273ea0375afSGary R Hook if (op->u.passthru.bit_mod != CCP_PASSTHRU_BITWISE_NOOP) 274956ee21aSGary R Hook cr[3] |= (op->sb_key << REQ4_KSB_SHIFT); 275ea0375afSGary R Hook } else { 276956ee21aSGary R Hook cr[2] = op->src.u.sb * CCP_SB_BYTES; 277956ee21aSGary R Hook cr[3] = (CCP_MEMTYPE_SB << REQ4_MEMTYPE_SHIFT); 278ea0375afSGary R Hook } 279ea0375afSGary R Hook 280ea0375afSGary R Hook if (op->dst.type == CCP_MEMTYPE_SYSTEM) { 281ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 282ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 283ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 284ea0375afSGary R Hook } else { 285956ee21aSGary R Hook cr[4] = op->dst.u.sb * CCP_SB_BYTES; 286956ee21aSGary R Hook cr[5] = (CCP_MEMTYPE_SB << REQ6_MEMTYPE_SHIFT); 287ea0375afSGary R Hook } 288ea0375afSGary R Hook 289ea0375afSGary R Hook if (op->eom) 290ea0375afSGary R Hook cr[0] |= REQ1_EOM; 291ea0375afSGary R Hook 292ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 293ea0375afSGary R Hook } 294ea0375afSGary R Hook 295ea0375afSGary R Hook static int ccp_perform_ecc(struct ccp_op *op) 296ea0375afSGary R Hook { 297ea0375afSGary R Hook u32 cr[6]; 298ea0375afSGary R Hook 299ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 300ea0375afSGary R Hook cr[0] = REQ1_ECC_AFFINE_CONVERT 301ea0375afSGary R Hook | (CCP_ENGINE_ECC << REQ1_ENGINE_SHIFT) 302ea0375afSGary R Hook | (op->u.ecc.function << REQ1_ECC_FUNCTION_SHIFT) 303ea0375afSGary R Hook | REQ1_EOM; 304ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 305ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 306ea0375afSGary R Hook cr[3] = (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 307ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 308ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 309ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 310ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 311ea0375afSGary R Hook 312ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 313ea0375afSGary R Hook } 314ea0375afSGary R Hook 315ea0375afSGary R Hook static int ccp_init(struct ccp_device *ccp) 316ea0375afSGary R Hook { 317ea0375afSGary R Hook struct device *dev = ccp->dev; 318ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 319ea0375afSGary R Hook struct dma_pool *dma_pool; 320ea0375afSGary R Hook char dma_pool_name[MAX_DMAPOOL_NAME_LEN]; 321ea0375afSGary R Hook unsigned int qmr, qim, i; 322ea0375afSGary R Hook int ret; 323ea0375afSGary R Hook 324ea0375afSGary R Hook /* Find available queues */ 325ea0375afSGary R Hook qim = 0; 326ea0375afSGary R Hook qmr = ioread32(ccp->io_regs + Q_MASK_REG); 327ea0375afSGary R Hook for (i = 0; i < MAX_HW_QUEUES; i++) { 328ea0375afSGary R Hook if (!(qmr & (1 << i))) 329ea0375afSGary R Hook continue; 330ea0375afSGary R Hook 331ea0375afSGary R Hook /* Allocate a dma pool for this queue */ 332ea0375afSGary R Hook snprintf(dma_pool_name, sizeof(dma_pool_name), "%s_q%d", 333ea0375afSGary R Hook ccp->name, i); 334ea0375afSGary R Hook dma_pool = dma_pool_create(dma_pool_name, dev, 335ea0375afSGary R Hook CCP_DMAPOOL_MAX_SIZE, 336ea0375afSGary R Hook CCP_DMAPOOL_ALIGN, 0); 337ea0375afSGary R Hook if (!dma_pool) { 338ea0375afSGary R Hook dev_err(dev, "unable to allocate dma pool\n"); 339ea0375afSGary R Hook ret = -ENOMEM; 340ea0375afSGary R Hook goto e_pool; 341ea0375afSGary R Hook } 342ea0375afSGary R Hook 343ea0375afSGary R Hook cmd_q = &ccp->cmd_q[ccp->cmd_q_count]; 344ea0375afSGary R Hook ccp->cmd_q_count++; 345ea0375afSGary R Hook 346ea0375afSGary R Hook cmd_q->ccp = ccp; 347ea0375afSGary R Hook cmd_q->id = i; 348ea0375afSGary R Hook cmd_q->dma_pool = dma_pool; 349ea0375afSGary R Hook 350ea0375afSGary R Hook /* Reserve 2 KSB regions for the queue */ 351956ee21aSGary R Hook cmd_q->sb_key = KSB_START + ccp->sb_start++; 352956ee21aSGary R Hook cmd_q->sb_ctx = KSB_START + ccp->sb_start++; 353956ee21aSGary R Hook ccp->sb_count -= 2; 354ea0375afSGary R Hook 355ea0375afSGary R Hook /* Preset some register values and masks that are queue 356ea0375afSGary R Hook * number dependent 357ea0375afSGary R Hook */ 358ea0375afSGary R Hook cmd_q->reg_status = ccp->io_regs + CMD_Q_STATUS_BASE + 359ea0375afSGary R Hook (CMD_Q_STATUS_INCR * i); 360ea0375afSGary R Hook cmd_q->reg_int_status = ccp->io_regs + CMD_Q_INT_STATUS_BASE + 361ea0375afSGary R Hook (CMD_Q_STATUS_INCR * i); 362ea0375afSGary R Hook cmd_q->int_ok = 1 << (i * 2); 363ea0375afSGary R Hook cmd_q->int_err = 1 << ((i * 2) + 1); 364ea0375afSGary R Hook 365bb4e89b3SGary R Hook cmd_q->free_slots = ccp_get_free_slots(cmd_q); 366ea0375afSGary R Hook 367ea0375afSGary R Hook init_waitqueue_head(&cmd_q->int_queue); 368ea0375afSGary R Hook 369ea0375afSGary R Hook /* Build queue interrupt mask (two interrupts per queue) */ 370ea0375afSGary R Hook qim |= cmd_q->int_ok | cmd_q->int_err; 371ea0375afSGary R Hook 372ea0375afSGary R Hook #ifdef CONFIG_ARM64 373ea0375afSGary R Hook /* For arm64 set the recommended queue cache settings */ 374ea0375afSGary R Hook iowrite32(ccp->axcache, ccp->io_regs + CMD_Q_CACHE_BASE + 375ea0375afSGary R Hook (CMD_Q_CACHE_INC * i)); 376ea0375afSGary R Hook #endif 377ea0375afSGary R Hook 378ea0375afSGary R Hook dev_dbg(dev, "queue #%u available\n", i); 379ea0375afSGary R Hook } 380ea0375afSGary R Hook if (ccp->cmd_q_count == 0) { 381ea0375afSGary R Hook dev_notice(dev, "no command queues available\n"); 382ea0375afSGary R Hook ret = -EIO; 383ea0375afSGary R Hook goto e_pool; 384ea0375afSGary R Hook } 385ea0375afSGary R Hook dev_notice(dev, "%u command queues available\n", ccp->cmd_q_count); 386ea0375afSGary R Hook 387ea0375afSGary R Hook /* Disable and clear interrupts until ready */ 388ea0375afSGary R Hook iowrite32(0x00, ccp->io_regs + IRQ_MASK_REG); 389ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 390ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 391ea0375afSGary R Hook 392ea0375afSGary R Hook ioread32(cmd_q->reg_int_status); 393ea0375afSGary R Hook ioread32(cmd_q->reg_status); 394ea0375afSGary R Hook } 395ea0375afSGary R Hook iowrite32(qim, ccp->io_regs + IRQ_STATUS_REG); 396ea0375afSGary R Hook 397ea0375afSGary R Hook /* Request an irq */ 398ea0375afSGary R Hook ret = ccp->get_irq(ccp); 399ea0375afSGary R Hook if (ret) { 400ea0375afSGary R Hook dev_err(dev, "unable to allocate an IRQ\n"); 401ea0375afSGary R Hook goto e_pool; 402ea0375afSGary R Hook } 403ea0375afSGary R Hook 404ea0375afSGary R Hook /* Initialize the queues used to wait for KSB space and suspend */ 405956ee21aSGary R Hook init_waitqueue_head(&ccp->sb_queue); 406ea0375afSGary R Hook init_waitqueue_head(&ccp->suspend_queue); 407ea0375afSGary R Hook 4084b394a23SGary R Hook dev_dbg(dev, "Starting threads...\n"); 409ea0375afSGary R Hook /* Create a kthread for each queue */ 410ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 411ea0375afSGary R Hook struct task_struct *kthread; 412ea0375afSGary R Hook 413ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 414ea0375afSGary R Hook 415ea0375afSGary R Hook kthread = kthread_create(ccp_cmd_queue_thread, cmd_q, 416ea0375afSGary R Hook "%s-q%u", ccp->name, cmd_q->id); 417ea0375afSGary R Hook if (IS_ERR(kthread)) { 418ea0375afSGary R Hook dev_err(dev, "error creating queue thread (%ld)\n", 419ea0375afSGary R Hook PTR_ERR(kthread)); 420ea0375afSGary R Hook ret = PTR_ERR(kthread); 421ea0375afSGary R Hook goto e_kthread; 422ea0375afSGary R Hook } 423ea0375afSGary R Hook 424ea0375afSGary R Hook cmd_q->kthread = kthread; 425ea0375afSGary R Hook wake_up_process(kthread); 426ea0375afSGary R Hook } 427ea0375afSGary R Hook 4284b394a23SGary R Hook dev_dbg(dev, "Enabling interrupts...\n"); 4294b394a23SGary R Hook /* Enable interrupts */ 4304b394a23SGary R Hook iowrite32(qim, ccp->io_regs + IRQ_MASK_REG); 4314b394a23SGary R Hook 4324b394a23SGary R Hook dev_dbg(dev, "Registering device...\n"); 4334b394a23SGary R Hook ccp_add_device(ccp); 4344b394a23SGary R Hook 435*084935b2SGary R Hook ret = ccp_register_rng(ccp); 436*084935b2SGary R Hook if (ret) 437ea0375afSGary R Hook goto e_kthread; 438ea0375afSGary R Hook 43958ea8abfSGary R Hook /* Register the DMA engine support */ 44058ea8abfSGary R Hook ret = ccp_dmaengine_register(ccp); 44158ea8abfSGary R Hook if (ret) 44258ea8abfSGary R Hook goto e_hwrng; 44358ea8abfSGary R Hook 444ea0375afSGary R Hook return 0; 445ea0375afSGary R Hook 44658ea8abfSGary R Hook e_hwrng: 447*084935b2SGary R Hook ccp_unregister_rng(ccp); 44858ea8abfSGary R Hook 449ea0375afSGary R Hook e_kthread: 450ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 451ea0375afSGary R Hook if (ccp->cmd_q[i].kthread) 452ea0375afSGary R Hook kthread_stop(ccp->cmd_q[i].kthread); 453ea0375afSGary R Hook 454ea0375afSGary R Hook ccp->free_irq(ccp); 455ea0375afSGary R Hook 456ea0375afSGary R Hook e_pool: 457ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 458ea0375afSGary R Hook dma_pool_destroy(ccp->cmd_q[i].dma_pool); 459ea0375afSGary R Hook 460ea0375afSGary R Hook return ret; 461ea0375afSGary R Hook } 462ea0375afSGary R Hook 463ea0375afSGary R Hook static void ccp_destroy(struct ccp_device *ccp) 464ea0375afSGary R Hook { 465ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 466ea0375afSGary R Hook struct ccp_cmd *cmd; 467ea0375afSGary R Hook unsigned int qim, i; 468ea0375afSGary R Hook 4694b394a23SGary R Hook /* Unregister the DMA engine */ 4704b394a23SGary R Hook ccp_dmaengine_unregister(ccp); 4714b394a23SGary R Hook 4724b394a23SGary R Hook /* Unregister the RNG */ 473*084935b2SGary R Hook ccp_unregister_rng(ccp); 4744b394a23SGary R Hook 4754b394a23SGary R Hook /* Remove this device from the list of available units */ 476ea0375afSGary R Hook ccp_del_device(ccp); 477ea0375afSGary R Hook 478ea0375afSGary R Hook /* Build queue interrupt mask (two interrupt masks per queue) */ 479ea0375afSGary R Hook qim = 0; 480ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 481ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 482ea0375afSGary R Hook qim |= cmd_q->int_ok | cmd_q->int_err; 483ea0375afSGary R Hook } 484ea0375afSGary R Hook 485ea0375afSGary R Hook /* Disable and clear interrupts */ 486ea0375afSGary R Hook iowrite32(0x00, ccp->io_regs + IRQ_MASK_REG); 487ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 488ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 489ea0375afSGary R Hook 490ea0375afSGary R Hook ioread32(cmd_q->reg_int_status); 491ea0375afSGary R Hook ioread32(cmd_q->reg_status); 492ea0375afSGary R Hook } 493ea0375afSGary R Hook iowrite32(qim, ccp->io_regs + IRQ_STATUS_REG); 494ea0375afSGary R Hook 4958256e683SGary R Hook /* Stop the queue kthreads */ 4968256e683SGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 4978256e683SGary R Hook if (ccp->cmd_q[i].kthread) 4988256e683SGary R Hook kthread_stop(ccp->cmd_q[i].kthread); 4998256e683SGary R Hook 500ea0375afSGary R Hook ccp->free_irq(ccp); 501ea0375afSGary R Hook 502ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 503ea0375afSGary R Hook dma_pool_destroy(ccp->cmd_q[i].dma_pool); 504ea0375afSGary R Hook 505ea0375afSGary R Hook /* Flush the cmd and backlog queue */ 506ea0375afSGary R Hook while (!list_empty(&ccp->cmd)) { 507ea0375afSGary R Hook /* Invoke the callback directly with an error code */ 508ea0375afSGary R Hook cmd = list_first_entry(&ccp->cmd, struct ccp_cmd, entry); 509ea0375afSGary R Hook list_del(&cmd->entry); 510ea0375afSGary R Hook cmd->callback(cmd->data, -ENODEV); 511ea0375afSGary R Hook } 512ea0375afSGary R Hook while (!list_empty(&ccp->backlog)) { 513ea0375afSGary R Hook /* Invoke the callback directly with an error code */ 514ea0375afSGary R Hook cmd = list_first_entry(&ccp->backlog, struct ccp_cmd, entry); 515ea0375afSGary R Hook list_del(&cmd->entry); 516ea0375afSGary R Hook cmd->callback(cmd->data, -ENODEV); 517ea0375afSGary R Hook } 518ea0375afSGary R Hook } 519ea0375afSGary R Hook 520ea0375afSGary R Hook static irqreturn_t ccp_irq_handler(int irq, void *data) 521ea0375afSGary R Hook { 522ea0375afSGary R Hook struct device *dev = data; 523ea0375afSGary R Hook struct ccp_device *ccp = dev_get_drvdata(dev); 524ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 525ea0375afSGary R Hook u32 q_int, status; 526ea0375afSGary R Hook unsigned int i; 527ea0375afSGary R Hook 528ea0375afSGary R Hook status = ioread32(ccp->io_regs + IRQ_STATUS_REG); 529ea0375afSGary R Hook 530ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 531ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 532ea0375afSGary R Hook 533ea0375afSGary R Hook q_int = status & (cmd_q->int_ok | cmd_q->int_err); 534ea0375afSGary R Hook if (q_int) { 535ea0375afSGary R Hook cmd_q->int_status = status; 536ea0375afSGary R Hook cmd_q->q_status = ioread32(cmd_q->reg_status); 537ea0375afSGary R Hook cmd_q->q_int_status = ioread32(cmd_q->reg_int_status); 538ea0375afSGary R Hook 539ea0375afSGary R Hook /* On error, only save the first error value */ 540ea0375afSGary R Hook if ((q_int & cmd_q->int_err) && !cmd_q->cmd_error) 541ea0375afSGary R Hook cmd_q->cmd_error = CMD_Q_ERROR(cmd_q->q_status); 542ea0375afSGary R Hook 543ea0375afSGary R Hook cmd_q->int_rcvd = 1; 544ea0375afSGary R Hook 545ea0375afSGary R Hook /* Acknowledge the interrupt and wake the kthread */ 546ea0375afSGary R Hook iowrite32(q_int, ccp->io_regs + IRQ_STATUS_REG); 547ea0375afSGary R Hook wake_up_interruptible(&cmd_q->int_queue); 548ea0375afSGary R Hook } 549ea0375afSGary R Hook } 550ea0375afSGary R Hook 551ea0375afSGary R Hook return IRQ_HANDLED; 552ea0375afSGary R Hook } 553ea0375afSGary R Hook 554bc197b2aSJulia Lawall static const struct ccp_actions ccp3_actions = { 555a43eb985SGary R Hook .aes = ccp_perform_aes, 556a43eb985SGary R Hook .xts_aes = ccp_perform_xts_aes, 557a43eb985SGary R Hook .sha = ccp_perform_sha, 558a43eb985SGary R Hook .rsa = ccp_perform_rsa, 559a43eb985SGary R Hook .passthru = ccp_perform_passthru, 560a43eb985SGary R Hook .ecc = ccp_perform_ecc, 56158a690b7SGary R Hook .sballoc = ccp_alloc_ksb, 56258a690b7SGary R Hook .sbfree = ccp_free_ksb, 563ea0375afSGary R Hook .init = ccp_init, 564ea0375afSGary R Hook .destroy = ccp_destroy, 565bb4e89b3SGary R Hook .get_free_slots = ccp_get_free_slots, 566ea0375afSGary R Hook .irqhandler = ccp_irq_handler, 567ea0375afSGary R Hook }; 568ea0375afSGary R Hook 569ea0375afSGary R Hook struct ccp_vdata ccpv3 = { 570ea0375afSGary R Hook .version = CCP_VERSION(3, 0), 5714b394a23SGary R Hook .setup = NULL, 572ea0375afSGary R Hook .perform = &ccp3_actions, 573fba8855cSGary R Hook .bar = 2, 574fba8855cSGary R Hook .offset = 0x20000, 575ea0375afSGary R Hook }; 576