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 3187b537b24SGary R Hook static void ccp_disable_queue_interrupts(struct ccp_device *ccp) 3197b537b24SGary R Hook { 3207b537b24SGary R Hook iowrite32(0x00, ccp->io_regs + IRQ_MASK_REG); 3217b537b24SGary R Hook } 3227b537b24SGary R Hook 3237b537b24SGary R Hook static void ccp_enable_queue_interrupts(struct ccp_device *ccp) 3247b537b24SGary R Hook { 3257b537b24SGary R Hook iowrite32(ccp->qim, ccp->io_regs + IRQ_MASK_REG); 3267b537b24SGary R Hook } 3277b537b24SGary R Hook 3287b537b24SGary R Hook static void ccp_irq_bh(unsigned long data) 3297b537b24SGary R Hook { 3307b537b24SGary R Hook struct ccp_device *ccp = (struct ccp_device *)data; 3317b537b24SGary R Hook struct ccp_cmd_queue *cmd_q; 3327b537b24SGary R Hook u32 q_int, status; 3337b537b24SGary R Hook unsigned int i; 3347b537b24SGary R Hook 3357b537b24SGary R Hook status = ioread32(ccp->io_regs + IRQ_STATUS_REG); 3367b537b24SGary R Hook 3377b537b24SGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 3387b537b24SGary R Hook cmd_q = &ccp->cmd_q[i]; 3397b537b24SGary R Hook 3407b537b24SGary R Hook q_int = status & (cmd_q->int_ok | cmd_q->int_err); 3417b537b24SGary R Hook if (q_int) { 3427b537b24SGary R Hook cmd_q->int_status = status; 3437b537b24SGary R Hook cmd_q->q_status = ioread32(cmd_q->reg_status); 3447b537b24SGary R Hook cmd_q->q_int_status = ioread32(cmd_q->reg_int_status); 3457b537b24SGary R Hook 3467b537b24SGary R Hook /* On error, only save the first error value */ 3477b537b24SGary R Hook if ((q_int & cmd_q->int_err) && !cmd_q->cmd_error) 3487b537b24SGary R Hook cmd_q->cmd_error = CMD_Q_ERROR(cmd_q->q_status); 3497b537b24SGary R Hook 3507b537b24SGary R Hook cmd_q->int_rcvd = 1; 3517b537b24SGary R Hook 3527b537b24SGary R Hook /* Acknowledge the interrupt and wake the kthread */ 3537b537b24SGary R Hook iowrite32(q_int, ccp->io_regs + IRQ_STATUS_REG); 3547b537b24SGary R Hook wake_up_interruptible(&cmd_q->int_queue); 3557b537b24SGary R Hook } 3567b537b24SGary R Hook } 3577b537b24SGary R Hook ccp_enable_queue_interrupts(ccp); 3587b537b24SGary R Hook } 3597b537b24SGary R Hook 3607b537b24SGary R Hook static irqreturn_t ccp_irq_handler(int irq, void *data) 3617b537b24SGary R Hook { 362720419f0SBrijesh Singh struct ccp_device *ccp = (struct ccp_device *)data; 3637b537b24SGary R Hook 3647b537b24SGary R Hook ccp_disable_queue_interrupts(ccp); 3657b537b24SGary R Hook if (ccp->use_tasklet) 3667b537b24SGary R Hook tasklet_schedule(&ccp->irq_tasklet); 3677b537b24SGary R Hook else 3687b537b24SGary R Hook ccp_irq_bh((unsigned long)ccp); 3697b537b24SGary R Hook 3707b537b24SGary R Hook return IRQ_HANDLED; 3717b537b24SGary R Hook } 3727b537b24SGary R Hook 373ea0375afSGary R Hook static int ccp_init(struct ccp_device *ccp) 374ea0375afSGary R Hook { 375ea0375afSGary R Hook struct device *dev = ccp->dev; 376ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 377ea0375afSGary R Hook struct dma_pool *dma_pool; 378ea0375afSGary R Hook char dma_pool_name[MAX_DMAPOOL_NAME_LEN]; 3797b537b24SGary R Hook unsigned int qmr, i; 380ea0375afSGary R Hook int ret; 381ea0375afSGary R Hook 382ea0375afSGary R Hook /* Find available queues */ 3837b537b24SGary R Hook ccp->qim = 0; 384ea0375afSGary R Hook qmr = ioread32(ccp->io_regs + Q_MASK_REG); 385ea0375afSGary R Hook for (i = 0; i < MAX_HW_QUEUES; i++) { 386ea0375afSGary R Hook if (!(qmr & (1 << i))) 387ea0375afSGary R Hook continue; 388ea0375afSGary R Hook 389ea0375afSGary R Hook /* Allocate a dma pool for this queue */ 390ea0375afSGary R Hook snprintf(dma_pool_name, sizeof(dma_pool_name), "%s_q%d", 391ea0375afSGary R Hook ccp->name, i); 392ea0375afSGary R Hook dma_pool = dma_pool_create(dma_pool_name, dev, 393ea0375afSGary R Hook CCP_DMAPOOL_MAX_SIZE, 394ea0375afSGary R Hook CCP_DMAPOOL_ALIGN, 0); 395ea0375afSGary R Hook if (!dma_pool) { 396ea0375afSGary R Hook dev_err(dev, "unable to allocate dma pool\n"); 397ea0375afSGary R Hook ret = -ENOMEM; 398ea0375afSGary R Hook goto e_pool; 399ea0375afSGary R Hook } 400ea0375afSGary R Hook 401ea0375afSGary R Hook cmd_q = &ccp->cmd_q[ccp->cmd_q_count]; 402ea0375afSGary R Hook ccp->cmd_q_count++; 403ea0375afSGary R Hook 404ea0375afSGary R Hook cmd_q->ccp = ccp; 405ea0375afSGary R Hook cmd_q->id = i; 406ea0375afSGary R Hook cmd_q->dma_pool = dma_pool; 407ea0375afSGary R Hook 408ea0375afSGary R Hook /* Reserve 2 KSB regions for the queue */ 409956ee21aSGary R Hook cmd_q->sb_key = KSB_START + ccp->sb_start++; 410956ee21aSGary R Hook cmd_q->sb_ctx = KSB_START + ccp->sb_start++; 411956ee21aSGary R Hook ccp->sb_count -= 2; 412ea0375afSGary R Hook 413ea0375afSGary R Hook /* Preset some register values and masks that are queue 414ea0375afSGary R Hook * number dependent 415ea0375afSGary R Hook */ 416ea0375afSGary R Hook cmd_q->reg_status = ccp->io_regs + CMD_Q_STATUS_BASE + 417ea0375afSGary R Hook (CMD_Q_STATUS_INCR * i); 418ea0375afSGary R Hook cmd_q->reg_int_status = ccp->io_regs + CMD_Q_INT_STATUS_BASE + 419ea0375afSGary R Hook (CMD_Q_STATUS_INCR * i); 420ea0375afSGary R Hook cmd_q->int_ok = 1 << (i * 2); 421ea0375afSGary R Hook cmd_q->int_err = 1 << ((i * 2) + 1); 422ea0375afSGary R Hook 423bb4e89b3SGary R Hook cmd_q->free_slots = ccp_get_free_slots(cmd_q); 424ea0375afSGary R Hook 425ea0375afSGary R Hook init_waitqueue_head(&cmd_q->int_queue); 426ea0375afSGary R Hook 427ea0375afSGary R Hook /* Build queue interrupt mask (two interrupts per queue) */ 4287b537b24SGary R Hook ccp->qim |= cmd_q->int_ok | cmd_q->int_err; 429ea0375afSGary R Hook 430ea0375afSGary R Hook #ifdef CONFIG_ARM64 431ea0375afSGary R Hook /* For arm64 set the recommended queue cache settings */ 432ea0375afSGary R Hook iowrite32(ccp->axcache, ccp->io_regs + CMD_Q_CACHE_BASE + 433ea0375afSGary R Hook (CMD_Q_CACHE_INC * i)); 434ea0375afSGary R Hook #endif 435ea0375afSGary R Hook 436ea0375afSGary R Hook dev_dbg(dev, "queue #%u available\n", i); 437ea0375afSGary R Hook } 438ea0375afSGary R Hook if (ccp->cmd_q_count == 0) { 439ea0375afSGary R Hook dev_notice(dev, "no command queues available\n"); 440ea0375afSGary R Hook ret = -EIO; 441ea0375afSGary R Hook goto e_pool; 442ea0375afSGary R Hook } 443ea0375afSGary R Hook dev_notice(dev, "%u command queues available\n", ccp->cmd_q_count); 444ea0375afSGary R Hook 445ea0375afSGary R Hook /* Disable and clear interrupts until ready */ 4467b537b24SGary R Hook ccp_disable_queue_interrupts(ccp); 447ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 448ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 449ea0375afSGary R Hook 450ea0375afSGary R Hook ioread32(cmd_q->reg_int_status); 451ea0375afSGary R Hook ioread32(cmd_q->reg_status); 452ea0375afSGary R Hook } 4537b537b24SGary R Hook iowrite32(ccp->qim, ccp->io_regs + IRQ_STATUS_REG); 454ea0375afSGary R Hook 455ea0375afSGary R Hook /* Request an irq */ 456*f4d18d65SBrijesh Singh ret = sp_request_ccp_irq(ccp->sp, ccp_irq_handler, ccp->name, ccp); 457ea0375afSGary R Hook if (ret) { 458ea0375afSGary R Hook dev_err(dev, "unable to allocate an IRQ\n"); 459ea0375afSGary R Hook goto e_pool; 460ea0375afSGary R Hook } 461ea0375afSGary R Hook 4627b537b24SGary R Hook /* Initialize the ISR tasklet? */ 4637b537b24SGary R Hook if (ccp->use_tasklet) 4647b537b24SGary R Hook tasklet_init(&ccp->irq_tasklet, ccp_irq_bh, 4657b537b24SGary R Hook (unsigned long)ccp); 4667b537b24SGary R Hook 4674b394a23SGary R Hook dev_dbg(dev, "Starting threads...\n"); 468ea0375afSGary R Hook /* Create a kthread for each queue */ 469ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 470ea0375afSGary R Hook struct task_struct *kthread; 471ea0375afSGary R Hook 472ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 473ea0375afSGary R Hook 474ea0375afSGary R Hook kthread = kthread_create(ccp_cmd_queue_thread, cmd_q, 475ea0375afSGary R Hook "%s-q%u", ccp->name, cmd_q->id); 476ea0375afSGary R Hook if (IS_ERR(kthread)) { 477ea0375afSGary R Hook dev_err(dev, "error creating queue thread (%ld)\n", 478ea0375afSGary R Hook PTR_ERR(kthread)); 479ea0375afSGary R Hook ret = PTR_ERR(kthread); 480ea0375afSGary R Hook goto e_kthread; 481ea0375afSGary R Hook } 482ea0375afSGary R Hook 483ea0375afSGary R Hook cmd_q->kthread = kthread; 484ea0375afSGary R Hook wake_up_process(kthread); 485ea0375afSGary R Hook } 486ea0375afSGary R Hook 4874b394a23SGary R Hook dev_dbg(dev, "Enabling interrupts...\n"); 4884b394a23SGary R Hook /* Enable interrupts */ 4897b537b24SGary R Hook ccp_enable_queue_interrupts(ccp); 4904b394a23SGary R Hook 4914b394a23SGary R Hook dev_dbg(dev, "Registering device...\n"); 4924b394a23SGary R Hook ccp_add_device(ccp); 4934b394a23SGary R Hook 494084935b2SGary R Hook ret = ccp_register_rng(ccp); 495084935b2SGary R Hook if (ret) 496ea0375afSGary R Hook goto e_kthread; 497ea0375afSGary R Hook 49858ea8abfSGary R Hook /* Register the DMA engine support */ 49958ea8abfSGary R Hook ret = ccp_dmaengine_register(ccp); 50058ea8abfSGary R Hook if (ret) 50158ea8abfSGary R Hook goto e_hwrng; 50258ea8abfSGary R Hook 503ea0375afSGary R Hook return 0; 504ea0375afSGary R Hook 50558ea8abfSGary R Hook e_hwrng: 506084935b2SGary R Hook ccp_unregister_rng(ccp); 50758ea8abfSGary R Hook 508ea0375afSGary R Hook e_kthread: 509ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 510ea0375afSGary R Hook if (ccp->cmd_q[i].kthread) 511ea0375afSGary R Hook kthread_stop(ccp->cmd_q[i].kthread); 512ea0375afSGary R Hook 513*f4d18d65SBrijesh Singh sp_free_ccp_irq(ccp->sp, ccp); 514ea0375afSGary R Hook 515ea0375afSGary R Hook e_pool: 516ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 517ea0375afSGary R Hook dma_pool_destroy(ccp->cmd_q[i].dma_pool); 518ea0375afSGary R Hook 519ea0375afSGary R Hook return ret; 520ea0375afSGary R Hook } 521ea0375afSGary R Hook 522ea0375afSGary R Hook static void ccp_destroy(struct ccp_device *ccp) 523ea0375afSGary R Hook { 524ea0375afSGary R Hook struct ccp_cmd_queue *cmd_q; 525ea0375afSGary R Hook struct ccp_cmd *cmd; 5267b537b24SGary R Hook unsigned int i; 527ea0375afSGary R Hook 5284b394a23SGary R Hook /* Unregister the DMA engine */ 5294b394a23SGary R Hook ccp_dmaengine_unregister(ccp); 5304b394a23SGary R Hook 5314b394a23SGary R Hook /* Unregister the RNG */ 532084935b2SGary R Hook ccp_unregister_rng(ccp); 5334b394a23SGary R Hook 5344b394a23SGary R Hook /* Remove this device from the list of available units */ 535ea0375afSGary R Hook ccp_del_device(ccp); 536ea0375afSGary R Hook 537ea0375afSGary R Hook /* Disable and clear interrupts */ 5387b537b24SGary R Hook ccp_disable_queue_interrupts(ccp); 539ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) { 540ea0375afSGary R Hook cmd_q = &ccp->cmd_q[i]; 541ea0375afSGary R Hook 542ea0375afSGary R Hook ioread32(cmd_q->reg_int_status); 543ea0375afSGary R Hook ioread32(cmd_q->reg_status); 544ea0375afSGary R Hook } 5457b537b24SGary R Hook iowrite32(ccp->qim, ccp->io_regs + IRQ_STATUS_REG); 546ea0375afSGary R Hook 5478256e683SGary R Hook /* Stop the queue kthreads */ 5488256e683SGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 5498256e683SGary R Hook if (ccp->cmd_q[i].kthread) 5508256e683SGary R Hook kthread_stop(ccp->cmd_q[i].kthread); 5518256e683SGary R Hook 552*f4d18d65SBrijesh Singh sp_free_ccp_irq(ccp->sp, ccp); 553ea0375afSGary R Hook 554ea0375afSGary R Hook for (i = 0; i < ccp->cmd_q_count; i++) 555ea0375afSGary R Hook dma_pool_destroy(ccp->cmd_q[i].dma_pool); 556ea0375afSGary R Hook 557ea0375afSGary R Hook /* Flush the cmd and backlog queue */ 558ea0375afSGary R Hook while (!list_empty(&ccp->cmd)) { 559ea0375afSGary R Hook /* Invoke the callback directly with an error code */ 560ea0375afSGary R Hook cmd = list_first_entry(&ccp->cmd, struct ccp_cmd, entry); 561ea0375afSGary R Hook list_del(&cmd->entry); 562ea0375afSGary R Hook cmd->callback(cmd->data, -ENODEV); 563ea0375afSGary R Hook } 564ea0375afSGary R Hook while (!list_empty(&ccp->backlog)) { 565ea0375afSGary R Hook /* Invoke the callback directly with an error code */ 566ea0375afSGary R Hook cmd = list_first_entry(&ccp->backlog, struct ccp_cmd, entry); 567ea0375afSGary R Hook list_del(&cmd->entry); 568ea0375afSGary R Hook cmd->callback(cmd->data, -ENODEV); 569ea0375afSGary R Hook } 570ea0375afSGary R Hook } 571ea0375afSGary R Hook 572bc197b2aSJulia Lawall static const struct ccp_actions ccp3_actions = { 573a43eb985SGary R Hook .aes = ccp_perform_aes, 574a43eb985SGary R Hook .xts_aes = ccp_perform_xts_aes, 575990672d4SGary R Hook .des3 = NULL, 576a43eb985SGary R Hook .sha = ccp_perform_sha, 577a43eb985SGary R Hook .rsa = ccp_perform_rsa, 578a43eb985SGary R Hook .passthru = ccp_perform_passthru, 579a43eb985SGary R Hook .ecc = ccp_perform_ecc, 58058a690b7SGary R Hook .sballoc = ccp_alloc_ksb, 58158a690b7SGary R Hook .sbfree = ccp_free_ksb, 582ea0375afSGary R Hook .init = ccp_init, 583ea0375afSGary R Hook .destroy = ccp_destroy, 584bb4e89b3SGary R Hook .get_free_slots = ccp_get_free_slots, 585ea0375afSGary R Hook .irqhandler = ccp_irq_handler, 586ea0375afSGary R Hook }; 587ea0375afSGary R Hook 588970e8303SBrijesh Singh const struct ccp_vdata ccpv3_platform = { 589970e8303SBrijesh Singh .version = CCP_VERSION(3, 0), 590970e8303SBrijesh Singh .setup = NULL, 591970e8303SBrijesh Singh .perform = &ccp3_actions, 592970e8303SBrijesh Singh .offset = 0, 593970e8303SBrijesh Singh }; 594970e8303SBrijesh Singh 5959ddb9dc6SGary R Hook const struct ccp_vdata ccpv3 = { 596ea0375afSGary R Hook .version = CCP_VERSION(3, 0), 5974b394a23SGary R Hook .setup = NULL, 598ea0375afSGary R Hook .perform = &ccp3_actions, 599fba8855cSGary R Hook .offset = 0x20000, 600ea0375afSGary R Hook }; 601