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; 12781422badSGary R Hook if (cmd_q->cmd_error) 12881422badSGary R Hook ccp_log_error(cmd_q->ccp, 12981422badSGary R Hook cmd_q->cmd_error); 130ea0375afSGary R Hook 131ea0375afSGary R Hook iowrite32(cmd, ccp->io_regs + DEL_CMD_Q_JOB); 132ea0375afSGary R Hook 133ea0375afSGary R Hook if (!ret) 134ea0375afSGary R Hook ret = -EIO; 135ea0375afSGary R Hook } else if (op->soc) { 136ea0375afSGary R Hook /* Delete just head job from the queue on SoC */ 137ea0375afSGary R Hook cmd = DEL_Q_ACTIVE 138ea0375afSGary R Hook | (cmd_q->id << DEL_Q_ID_SHIFT) 139ea0375afSGary R Hook | op->jobid; 140ea0375afSGary R Hook 141ea0375afSGary R Hook iowrite32(cmd, ccp->io_regs + DEL_CMD_Q_JOB); 142ea0375afSGary R Hook } 143ea0375afSGary R Hook 144ea0375afSGary R Hook cmd_q->free_slots = CMD_Q_DEPTH(cmd_q->q_status); 145ea0375afSGary R Hook 146ea0375afSGary R Hook cmd_q->int_rcvd = 0; 147ea0375afSGary R Hook } 148ea0375afSGary R Hook 149ea0375afSGary R Hook return ret; 150ea0375afSGary R Hook } 151ea0375afSGary R Hook 152ea0375afSGary R Hook static int ccp_perform_aes(struct ccp_op *op) 153ea0375afSGary R Hook { 154ea0375afSGary R Hook u32 cr[6]; 155ea0375afSGary R Hook 156ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 157ea0375afSGary R Hook cr[0] = (CCP_ENGINE_AES << REQ1_ENGINE_SHIFT) 158ea0375afSGary R Hook | (op->u.aes.type << REQ1_AES_TYPE_SHIFT) 159ea0375afSGary R Hook | (op->u.aes.mode << REQ1_AES_MODE_SHIFT) 160ea0375afSGary R Hook | (op->u.aes.action << REQ1_AES_ACTION_SHIFT) 161956ee21aSGary R Hook | (op->sb_key << REQ1_KEY_KSB_SHIFT); 162ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 163ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 164956ee21aSGary R Hook cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT) 165ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 166ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 167ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 168ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 169ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 170ea0375afSGary R Hook 171ea0375afSGary R Hook if (op->u.aes.mode == CCP_AES_MODE_CFB) 172ea0375afSGary R Hook cr[0] |= ((0x7f) << REQ1_AES_CFB_SIZE_SHIFT); 173ea0375afSGary R Hook 174ea0375afSGary R Hook if (op->eom) 175ea0375afSGary R Hook cr[0] |= REQ1_EOM; 176ea0375afSGary R Hook 177ea0375afSGary R Hook if (op->init) 178ea0375afSGary R Hook cr[0] |= REQ1_INIT; 179ea0375afSGary R Hook 180ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 181ea0375afSGary R Hook } 182ea0375afSGary R Hook 183ea0375afSGary R Hook static int ccp_perform_xts_aes(struct ccp_op *op) 184ea0375afSGary R Hook { 185ea0375afSGary R Hook u32 cr[6]; 186ea0375afSGary R Hook 187ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 188ea0375afSGary R Hook cr[0] = (CCP_ENGINE_XTS_AES_128 << REQ1_ENGINE_SHIFT) 189ea0375afSGary R Hook | (op->u.xts.action << REQ1_AES_ACTION_SHIFT) 190ea0375afSGary R Hook | (op->u.xts.unit_size << REQ1_XTS_AES_SIZE_SHIFT) 191956ee21aSGary R Hook | (op->sb_key << REQ1_KEY_KSB_SHIFT); 192ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 193ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 194956ee21aSGary R Hook cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT) 195ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 196ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 197ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 198ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 199ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 200ea0375afSGary R Hook 201ea0375afSGary R Hook if (op->eom) 202ea0375afSGary R Hook cr[0] |= REQ1_EOM; 203ea0375afSGary R Hook 204ea0375afSGary R Hook if (op->init) 205ea0375afSGary R Hook cr[0] |= REQ1_INIT; 206ea0375afSGary R Hook 207ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 208ea0375afSGary R Hook } 209ea0375afSGary R Hook 210ea0375afSGary R Hook static int ccp_perform_sha(struct ccp_op *op) 211ea0375afSGary R Hook { 212ea0375afSGary R Hook u32 cr[6]; 213ea0375afSGary R Hook 214ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 215ea0375afSGary R Hook cr[0] = (CCP_ENGINE_SHA << REQ1_ENGINE_SHIFT) 216ea0375afSGary R Hook | (op->u.sha.type << REQ1_SHA_TYPE_SHIFT) 217ea0375afSGary R Hook | REQ1_INIT; 218ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 219ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 220956ee21aSGary R Hook cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT) 221ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 222ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 223ea0375afSGary R Hook 224ea0375afSGary R Hook if (op->eom) { 225ea0375afSGary R Hook cr[0] |= REQ1_EOM; 226ea0375afSGary R Hook cr[4] = lower_32_bits(op->u.sha.msg_bits); 227ea0375afSGary R Hook cr[5] = upper_32_bits(op->u.sha.msg_bits); 228ea0375afSGary R Hook } else { 229ea0375afSGary R Hook cr[4] = 0; 230ea0375afSGary R Hook cr[5] = 0; 231ea0375afSGary R Hook } 232ea0375afSGary R Hook 233ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 234ea0375afSGary R Hook } 235ea0375afSGary R Hook 236ea0375afSGary R Hook static int ccp_perform_rsa(struct ccp_op *op) 237ea0375afSGary R Hook { 238ea0375afSGary R Hook u32 cr[6]; 239ea0375afSGary R Hook 240ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 241ea0375afSGary R Hook cr[0] = (CCP_ENGINE_RSA << REQ1_ENGINE_SHIFT) 242ea0375afSGary R Hook | (op->u.rsa.mod_size << REQ1_RSA_MOD_SIZE_SHIFT) 243956ee21aSGary R Hook | (op->sb_key << REQ1_KEY_KSB_SHIFT) 244ea0375afSGary R Hook | REQ1_EOM; 245ea0375afSGary R Hook cr[1] = op->u.rsa.input_len - 1; 246ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 247956ee21aSGary R Hook cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT) 248ea0375afSGary R Hook | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 249ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 250ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 251ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 252ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 253ea0375afSGary R Hook 254ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 255ea0375afSGary R Hook } 256ea0375afSGary R Hook 257ea0375afSGary R Hook static int ccp_perform_passthru(struct ccp_op *op) 258ea0375afSGary R Hook { 259ea0375afSGary R Hook u32 cr[6]; 260ea0375afSGary R Hook 261ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 262ea0375afSGary R Hook cr[0] = (CCP_ENGINE_PASSTHRU << REQ1_ENGINE_SHIFT) 263ea0375afSGary R Hook | (op->u.passthru.bit_mod << REQ1_PT_BW_SHIFT) 264ea0375afSGary R Hook | (op->u.passthru.byte_swap << REQ1_PT_BS_SHIFT); 265ea0375afSGary R Hook 266ea0375afSGary R Hook if (op->src.type == CCP_MEMTYPE_SYSTEM) 267ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 268ea0375afSGary R Hook else 269ea0375afSGary R Hook cr[1] = op->dst.u.dma.length - 1; 270ea0375afSGary R Hook 271ea0375afSGary R Hook if (op->src.type == CCP_MEMTYPE_SYSTEM) { 272ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 273ea0375afSGary R Hook cr[3] = (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 274ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 275ea0375afSGary R Hook 276ea0375afSGary R Hook if (op->u.passthru.bit_mod != CCP_PASSTHRU_BITWISE_NOOP) 277956ee21aSGary R Hook cr[3] |= (op->sb_key << REQ4_KSB_SHIFT); 278ea0375afSGary R Hook } else { 279956ee21aSGary R Hook cr[2] = op->src.u.sb * CCP_SB_BYTES; 280956ee21aSGary R Hook cr[3] = (CCP_MEMTYPE_SB << REQ4_MEMTYPE_SHIFT); 281ea0375afSGary R Hook } 282ea0375afSGary R Hook 283ea0375afSGary R Hook if (op->dst.type == CCP_MEMTYPE_SYSTEM) { 284ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 285ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 286ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 287ea0375afSGary R Hook } else { 288956ee21aSGary R Hook cr[4] = op->dst.u.sb * CCP_SB_BYTES; 289956ee21aSGary R Hook cr[5] = (CCP_MEMTYPE_SB << REQ6_MEMTYPE_SHIFT); 290ea0375afSGary R Hook } 291ea0375afSGary R Hook 292ea0375afSGary R Hook if (op->eom) 293ea0375afSGary R Hook cr[0] |= REQ1_EOM; 294ea0375afSGary R Hook 295ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 296ea0375afSGary R Hook } 297ea0375afSGary R Hook 298ea0375afSGary R Hook static int ccp_perform_ecc(struct ccp_op *op) 299ea0375afSGary R Hook { 300ea0375afSGary R Hook u32 cr[6]; 301ea0375afSGary R Hook 302ea0375afSGary R Hook /* Fill out the register contents for REQ1 through REQ6 */ 303ea0375afSGary R Hook cr[0] = REQ1_ECC_AFFINE_CONVERT 304ea0375afSGary R Hook | (CCP_ENGINE_ECC << REQ1_ENGINE_SHIFT) 305ea0375afSGary R Hook | (op->u.ecc.function << REQ1_ECC_FUNCTION_SHIFT) 306ea0375afSGary R Hook | REQ1_EOM; 307ea0375afSGary R Hook cr[1] = op->src.u.dma.length - 1; 308ea0375afSGary R Hook cr[2] = ccp_addr_lo(&op->src.u.dma); 309ea0375afSGary R Hook cr[3] = (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) 310ea0375afSGary R Hook | ccp_addr_hi(&op->src.u.dma); 311ea0375afSGary R Hook cr[4] = ccp_addr_lo(&op->dst.u.dma); 312ea0375afSGary R Hook cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) 313ea0375afSGary R Hook | ccp_addr_hi(&op->dst.u.dma); 314ea0375afSGary R Hook 315ea0375afSGary R Hook return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); 316ea0375afSGary R Hook } 317ea0375afSGary R Hook 318*7b537b24SGary R Hook static void ccp_disable_queue_interrupts(struct ccp_device *ccp) 319*7b537b24SGary R Hook { 320*7b537b24SGary R Hook iowrite32(0x00, ccp->io_regs + IRQ_MASK_REG); 321*7b537b24SGary R Hook } 322*7b537b24SGary R Hook 323*7b537b24SGary R Hook static void ccp_enable_queue_interrupts(struct ccp_device *ccp) 324*7b537b24SGary R Hook { 325*7b537b24SGary R Hook iowrite32(ccp->qim, ccp->io_regs + IRQ_MASK_REG); 326*7b537b24SGary R Hook } 327*7b537b24SGary R Hook 328*7b537b24SGary R Hook static void ccp_irq_bh(unsigned long data) 329*7b537b24SGary R Hook { 330*7b537b24SGary R Hook struct ccp_device *ccp = (struct ccp_device *)data; 331*7b537b24SGary R Hook struct ccp_cmd_queue *cmd_q; 332*7b537b24SGary R Hook u32 q_int, status; 333*7b537b24SGary R Hook unsigned int i; 334*7b537b24SGary R Hook 335*7b537b24SGary R Hook status = ioread32(ccp->io_regs + IRQ_STATUS_REG); 336*7b537b24SGary R Hook 337*7b537b24SGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 338*7b537b24SGary R Hook cmd_q = &ccp->cmd_q[i]; 339*7b537b24SGary R Hook 340*7b537b24SGary R Hook q_int = status & (cmd_q->int_ok | cmd_q->int_err); 341*7b537b24SGary R Hook if (q_int) { 342*7b537b24SGary R Hook cmd_q->int_status = status; 343*7b537b24SGary R Hook cmd_q->q_status = ioread32(cmd_q->reg_status); 344*7b537b24SGary R Hook cmd_q->q_int_status = ioread32(cmd_q->reg_int_status); 345*7b537b24SGary R Hook 346*7b537b24SGary R Hook /* On error, only save the first error value */ 347*7b537b24SGary R Hook if ((q_int & cmd_q->int_err) && !cmd_q->cmd_error) 348*7b537b24SGary R Hook cmd_q->cmd_error = CMD_Q_ERROR(cmd_q->q_status); 349*7b537b24SGary R Hook 350*7b537b24SGary R Hook cmd_q->int_rcvd = 1; 351*7b537b24SGary R Hook 352*7b537b24SGary R Hook /* Acknowledge the interrupt and wake the kthread */ 353*7b537b24SGary R Hook iowrite32(q_int, ccp->io_regs + IRQ_STATUS_REG); 354*7b537b24SGary R Hook wake_up_interruptible(&cmd_q->int_queue); 355*7b537b24SGary R Hook } 356*7b537b24SGary R Hook } 357*7b537b24SGary R Hook ccp_enable_queue_interrupts(ccp); 358*7b537b24SGary R Hook } 359*7b537b24SGary R Hook 360*7b537b24SGary R Hook static irqreturn_t ccp_irq_handler(int irq, void *data) 361*7b537b24SGary R Hook { 362*7b537b24SGary R Hook struct device *dev = data; 363*7b537b24SGary R Hook struct ccp_device *ccp = dev_get_drvdata(dev); 364*7b537b24SGary R Hook 365*7b537b24SGary R Hook ccp_disable_queue_interrupts(ccp); 366*7b537b24SGary R Hook if (ccp->use_tasklet) 367*7b537b24SGary R Hook tasklet_schedule(&ccp->irq_tasklet); 368*7b537b24SGary R Hook else 369*7b537b24SGary R Hook ccp_irq_bh((unsigned long)ccp); 370*7b537b24SGary R Hook 371*7b537b24SGary R Hook return IRQ_HANDLED; 372*7b537b24SGary R Hook } 373*7b537b24SGary R Hook 374ea0375afSGary R Hook static int ccp_init(struct ccp_device *ccp) 375ea0375afSGary R Hook { 376ea0375afSGary R Hook struct device *dev = ccp->dev; 377ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 378ea0375afSGary R Hook struct dma_pool *dma_pool; 379ea0375afSGary R Hook char dma_pool_name[MAX_DMAPOOL_NAME_LEN]; 380*7b537b24SGary R Hook unsigned int qmr, i; 381ea0375afSGary R Hook int ret; 382ea0375afSGary R Hook 383ea0375afSGary R Hook /* Find available queues */ 384*7b537b24SGary R Hook ccp->qim = 0; 385ea0375afSGary R Hook qmr = ioread32(ccp->io_regs + Q_MASK_REG); 386ea0375afSGary R Hook for (i = 0; i < MAX_HW_QUEUES; i++) { 387ea0375afSGary R Hook if (!(qmr & (1 << i))) 388ea0375afSGary R Hook continue; 389ea0375afSGary R Hook 390ea0375afSGary R Hook /* Allocate a dma pool for this queue */ 391ea0375afSGary R Hook snprintf(dma_pool_name, sizeof(dma_pool_name), "%s_q%d", 392ea0375afSGary R Hook ccp->name, i); 393ea0375afSGary R Hook dma_pool = dma_pool_create(dma_pool_name, dev, 394ea0375afSGary R Hook CCP_DMAPOOL_MAX_SIZE, 395ea0375afSGary R Hook CCP_DMAPOOL_ALIGN, 0); 396ea0375afSGary R Hook if (!dma_pool) { 397ea0375afSGary R Hook dev_err(dev, "unable to allocate dma pool\n"); 398ea0375afSGary R Hook ret = -ENOMEM; 399ea0375afSGary R Hook goto e_pool; 400ea0375afSGary R Hook } 401ea0375afSGary R Hook 402ea0375afSGary R Hook cmd_q = &ccp->cmd_q[ccp->cmd_q_count]; 403ea0375afSGary R Hook ccp->cmd_q_count++; 404ea0375afSGary R Hook 405ea0375afSGary R Hook cmd_q->ccp = ccp; 406ea0375afSGary R Hook cmd_q->id = i; 407ea0375afSGary R Hook cmd_q->dma_pool = dma_pool; 408ea0375afSGary R Hook 409ea0375afSGary R Hook /* Reserve 2 KSB regions for the queue */ 410956ee21aSGary R Hook cmd_q->sb_key = KSB_START + ccp->sb_start++; 411956ee21aSGary R Hook cmd_q->sb_ctx = KSB_START + ccp->sb_start++; 412956ee21aSGary R Hook ccp->sb_count -= 2; 413ea0375afSGary R Hook 414ea0375afSGary R Hook /* Preset some register values and masks that are queue 415ea0375afSGary R Hook * number dependent 416ea0375afSGary R Hook */ 417ea0375afSGary R Hook cmd_q->reg_status = ccp->io_regs + CMD_Q_STATUS_BASE + 418ea0375afSGary R Hook (CMD_Q_STATUS_INCR * i); 419ea0375afSGary R Hook cmd_q->reg_int_status = ccp->io_regs + CMD_Q_INT_STATUS_BASE + 420ea0375afSGary R Hook (CMD_Q_STATUS_INCR * i); 421ea0375afSGary R Hook cmd_q->int_ok = 1 << (i * 2); 422ea0375afSGary R Hook cmd_q->int_err = 1 << ((i * 2) + 1); 423ea0375afSGary R Hook 424bb4e89b3SGary R Hook cmd_q->free_slots = ccp_get_free_slots(cmd_q); 425ea0375afSGary R Hook 426ea0375afSGary R Hook init_waitqueue_head(&cmd_q->int_queue); 427ea0375afSGary R Hook 428ea0375afSGary R Hook /* Build queue interrupt mask (two interrupts per queue) */ 429*7b537b24SGary R Hook ccp->qim |= cmd_q->int_ok | cmd_q->int_err; 430ea0375afSGary R Hook 431ea0375afSGary R Hook #ifdef CONFIG_ARM64 432ea0375afSGary R Hook /* For arm64 set the recommended queue cache settings */ 433ea0375afSGary R Hook iowrite32(ccp->axcache, ccp->io_regs + CMD_Q_CACHE_BASE + 434ea0375afSGary R Hook (CMD_Q_CACHE_INC * i)); 435ea0375afSGary R Hook #endif 436ea0375afSGary R Hook 437ea0375afSGary R Hook dev_dbg(dev, "queue #%u available\n", i); 438ea0375afSGary R Hook } 439ea0375afSGary R Hook if (ccp->cmd_q_count == 0) { 440ea0375afSGary R Hook dev_notice(dev, "no command queues available\n"); 441ea0375afSGary R Hook ret = -EIO; 442ea0375afSGary R Hook goto e_pool; 443ea0375afSGary R Hook } 444ea0375afSGary R Hook dev_notice(dev, "%u command queues available\n", ccp->cmd_q_count); 445ea0375afSGary R Hook 446ea0375afSGary R Hook /* Disable and clear interrupts until ready */ 447*7b537b24SGary R Hook ccp_disable_queue_interrupts(ccp); 448ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 449ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 450ea0375afSGary R Hook 451ea0375afSGary R Hook ioread32(cmd_q->reg_int_status); 452ea0375afSGary R Hook ioread32(cmd_q->reg_status); 453ea0375afSGary R Hook } 454*7b537b24SGary R Hook iowrite32(ccp->qim, ccp->io_regs + IRQ_STATUS_REG); 455ea0375afSGary R Hook 456ea0375afSGary R Hook /* Request an irq */ 457ea0375afSGary R Hook ret = ccp->get_irq(ccp); 458ea0375afSGary R Hook if (ret) { 459ea0375afSGary R Hook dev_err(dev, "unable to allocate an IRQ\n"); 460ea0375afSGary R Hook goto e_pool; 461ea0375afSGary R Hook } 462ea0375afSGary R Hook 463*7b537b24SGary R Hook /* Initialize the ISR tasklet? */ 464*7b537b24SGary R Hook if (ccp->use_tasklet) 465*7b537b24SGary R Hook tasklet_init(&ccp->irq_tasklet, ccp_irq_bh, 466*7b537b24SGary R Hook (unsigned long)ccp); 467*7b537b24SGary R Hook 4684b394a23SGary R Hook dev_dbg(dev, "Starting threads...\n"); 469ea0375afSGary R Hook /* Create a kthread for each queue */ 470ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 471ea0375afSGary R Hook struct task_struct *kthread; 472ea0375afSGary R Hook 473ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 474ea0375afSGary R Hook 475ea0375afSGary R Hook kthread = kthread_create(ccp_cmd_queue_thread, cmd_q, 476ea0375afSGary R Hook "%s-q%u", ccp->name, cmd_q->id); 477ea0375afSGary R Hook if (IS_ERR(kthread)) { 478ea0375afSGary R Hook dev_err(dev, "error creating queue thread (%ld)\n", 479ea0375afSGary R Hook PTR_ERR(kthread)); 480ea0375afSGary R Hook ret = PTR_ERR(kthread); 481ea0375afSGary R Hook goto e_kthread; 482ea0375afSGary R Hook } 483ea0375afSGary R Hook 484ea0375afSGary R Hook cmd_q->kthread = kthread; 485ea0375afSGary R Hook wake_up_process(kthread); 486ea0375afSGary R Hook } 487ea0375afSGary R Hook 4884b394a23SGary R Hook dev_dbg(dev, "Enabling interrupts...\n"); 4894b394a23SGary R Hook /* Enable interrupts */ 490*7b537b24SGary R Hook ccp_enable_queue_interrupts(ccp); 4914b394a23SGary R Hook 4924b394a23SGary R Hook dev_dbg(dev, "Registering device...\n"); 4934b394a23SGary R Hook ccp_add_device(ccp); 4944b394a23SGary R Hook 495084935b2SGary R Hook ret = ccp_register_rng(ccp); 496084935b2SGary R Hook if (ret) 497ea0375afSGary R Hook goto e_kthread; 498ea0375afSGary R Hook 49958ea8abfSGary R Hook /* Register the DMA engine support */ 50058ea8abfSGary R Hook ret = ccp_dmaengine_register(ccp); 50158ea8abfSGary R Hook if (ret) 50258ea8abfSGary R Hook goto e_hwrng; 50358ea8abfSGary R Hook 504ea0375afSGary R Hook return 0; 505ea0375afSGary R Hook 50658ea8abfSGary R Hook e_hwrng: 507084935b2SGary R Hook ccp_unregister_rng(ccp); 50858ea8abfSGary R Hook 509ea0375afSGary R Hook e_kthread: 510ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 511ea0375afSGary R Hook if (ccp->cmd_q[i].kthread) 512ea0375afSGary R Hook kthread_stop(ccp->cmd_q[i].kthread); 513ea0375afSGary R Hook 514ea0375afSGary R Hook ccp->free_irq(ccp); 515ea0375afSGary R Hook 516ea0375afSGary R Hook e_pool: 517ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 518ea0375afSGary R Hook dma_pool_destroy(ccp->cmd_q[i].dma_pool); 519ea0375afSGary R Hook 520ea0375afSGary R Hook return ret; 521ea0375afSGary R Hook } 522ea0375afSGary R Hook 523ea0375afSGary R Hook static void ccp_destroy(struct ccp_device *ccp) 524ea0375afSGary R Hook { 525ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 526ea0375afSGary R Hook struct ccp_cmd *cmd; 527*7b537b24SGary R Hook unsigned int i; 528ea0375afSGary R Hook 5294b394a23SGary R Hook /* Unregister the DMA engine */ 5304b394a23SGary R Hook ccp_dmaengine_unregister(ccp); 5314b394a23SGary R Hook 5324b394a23SGary R Hook /* Unregister the RNG */ 533084935b2SGary R Hook ccp_unregister_rng(ccp); 5344b394a23SGary R Hook 5354b394a23SGary R Hook /* Remove this device from the list of available units */ 536ea0375afSGary R Hook ccp_del_device(ccp); 537ea0375afSGary R Hook 538ea0375afSGary R Hook /* Disable and clear interrupts */ 539*7b537b24SGary R Hook ccp_disable_queue_interrupts(ccp); 540ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 541ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 542ea0375afSGary R Hook 543ea0375afSGary R Hook ioread32(cmd_q->reg_int_status); 544ea0375afSGary R Hook ioread32(cmd_q->reg_status); 545ea0375afSGary R Hook } 546*7b537b24SGary R Hook iowrite32(ccp->qim, ccp->io_regs + IRQ_STATUS_REG); 547ea0375afSGary R Hook 5488256e683SGary R Hook /* Stop the queue kthreads */ 5498256e683SGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 5508256e683SGary R Hook if (ccp->cmd_q[i].kthread) 5518256e683SGary R Hook kthread_stop(ccp->cmd_q[i].kthread); 5528256e683SGary R Hook 553ea0375afSGary R Hook ccp->free_irq(ccp); 554ea0375afSGary R Hook 555ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 556ea0375afSGary R Hook dma_pool_destroy(ccp->cmd_q[i].dma_pool); 557ea0375afSGary R Hook 558ea0375afSGary R Hook /* Flush the cmd and backlog queue */ 559ea0375afSGary R Hook while (!list_empty(&ccp->cmd)) { 560ea0375afSGary R Hook /* Invoke the callback directly with an error code */ 561ea0375afSGary R Hook cmd = list_first_entry(&ccp->cmd, struct ccp_cmd, entry); 562ea0375afSGary R Hook list_del(&cmd->entry); 563ea0375afSGary R Hook cmd->callback(cmd->data, -ENODEV); 564ea0375afSGary R Hook } 565ea0375afSGary R Hook while (!list_empty(&ccp->backlog)) { 566ea0375afSGary R Hook /* Invoke the callback directly with an error code */ 567ea0375afSGary R Hook cmd = list_first_entry(&ccp->backlog, struct ccp_cmd, entry); 568ea0375afSGary R Hook list_del(&cmd->entry); 569ea0375afSGary R Hook cmd->callback(cmd->data, -ENODEV); 570ea0375afSGary R Hook } 571ea0375afSGary R Hook } 572ea0375afSGary R Hook 573bc197b2aSJulia Lawall static const struct ccp_actions ccp3_actions = { 574a43eb985SGary R Hook .aes = ccp_perform_aes, 575a43eb985SGary R Hook .xts_aes = ccp_perform_xts_aes, 576990672d4SGary R Hook .des3 = NULL, 577a43eb985SGary R Hook .sha = ccp_perform_sha, 578a43eb985SGary R Hook .rsa = ccp_perform_rsa, 579a43eb985SGary R Hook .passthru = ccp_perform_passthru, 580a43eb985SGary R Hook .ecc = ccp_perform_ecc, 58158a690b7SGary R Hook .sballoc = ccp_alloc_ksb, 58258a690b7SGary R Hook .sbfree = ccp_free_ksb, 583ea0375afSGary R Hook .init = ccp_init, 584ea0375afSGary R Hook .destroy = ccp_destroy, 585bb4e89b3SGary R Hook .get_free_slots = ccp_get_free_slots, 586ea0375afSGary R Hook .irqhandler = ccp_irq_handler, 587ea0375afSGary R Hook }; 588ea0375afSGary R Hook 5899ddb9dc6SGary R Hook const struct ccp_vdata ccpv3 = { 590ea0375afSGary R Hook .version = CCP_VERSION(3, 0), 5914b394a23SGary R Hook .setup = NULL, 592ea0375afSGary R Hook .perform = &ccp3_actions, 593fba8855cSGary R Hook .bar = 2, 594fba8855cSGary R Hook .offset = 0x20000, 595ea0375afSGary R Hook }; 596