// SPDX-License-Identifier: GPL-2.0-only /* * AMD Cryptographic Coprocessor (CCP) driver * * Copyright (C) 2016,2019 Advanced Micro Devices, Inc. * * Author: Gary R Hook <[email protected]> */ #include <linux/kernel.h> #include <linux/kthread.h> #include <linux/dma-mapping.h> #include <linux/interrupt.h> #include <linux/compiler.h> #include <linux/ccp.h> #include "ccp-dev.h" /* Allocate the requested number of contiguous LSB slots * from the LSB bitmap. Look in the private range for this * queue first; failing that, check the public area. * If no space is available, wait around. * Return: first slot number */ static u32 ccp_lsb_alloc(struct ccp_cmd_queue *cmd_q, unsigned int count) { … } /* Free a number of LSB slots from the bitmap, starting at * the indicated starting slot number. */ static void ccp_lsb_free(struct ccp_cmd_queue *cmd_q, unsigned int start, unsigned int count) { … } /* CCP version 5: Union to define the function field (cmd_reg1/dword0) */ ccp_function; #define CCP_AES_SIZE(p) … #define CCP_AES_ENCRYPT(p) … #define CCP_AES_MODE(p) … #define CCP_AES_TYPE(p) … #define CCP_XTS_SIZE(p) … #define CCP_XTS_TYPE(p) … #define CCP_XTS_ENCRYPT(p) … #define CCP_DES3_SIZE(p) … #define CCP_DES3_ENCRYPT(p) … #define CCP_DES3_MODE(p) … #define CCP_DES3_TYPE(p) … #define CCP_SHA_TYPE(p) … #define CCP_RSA_SIZE(p) … #define CCP_PT_BYTESWAP(p) … #define CCP_PT_BITWISE(p) … #define CCP_ECC_MODE(p) … #define CCP_ECC_AFFINE(p) … /* Word 0 */ #define CCP5_CMD_DW0(p) … #define CCP5_CMD_SOC(p) … #define CCP5_CMD_IOC(p) … #define CCP5_CMD_INIT(p) … #define CCP5_CMD_EOM(p) … #define CCP5_CMD_FUNCTION(p) … #define CCP5_CMD_ENGINE(p) … #define CCP5_CMD_PROT(p) … /* Word 1 */ #define CCP5_CMD_DW1(p) … #define CCP5_CMD_LEN(p) … /* Word 2 */ #define CCP5_CMD_DW2(p) … #define CCP5_CMD_SRC_LO(p) … /* Word 3 */ #define CCP5_CMD_DW3(p) … #define CCP5_CMD_SRC_MEM(p) … #define CCP5_CMD_SRC_HI(p) … #define CCP5_CMD_LSB_ID(p) … #define CCP5_CMD_FIX_SRC(p) … /* Words 4/5 */ #define CCP5_CMD_DW4(p) … #define CCP5_CMD_DST_LO(p) … #define CCP5_CMD_DW5(p) … #define CCP5_CMD_DST_HI(p) … #define CCP5_CMD_DST_MEM(p) … #define CCP5_CMD_FIX_DST(p) … #define CCP5_CMD_SHA_LO(p) … #define CCP5_CMD_SHA_HI(p) … /* Word 6/7 */ #define CCP5_CMD_DW6(p) … #define CCP5_CMD_KEY_LO(p) … #define CCP5_CMD_DW7(p) … #define CCP5_CMD_KEY_HI(p) … #define CCP5_CMD_KEY_MEM(p) … static inline u32 low_address(unsigned long addr) { … } static inline u32 high_address(unsigned long addr) { … } static unsigned int ccp5_get_free_slots(struct ccp_cmd_queue *cmd_q) { … } static int ccp5_do_cmd(struct ccp5_desc *desc, struct ccp_cmd_queue *cmd_q) { … } static int ccp5_perform_aes(struct ccp_op *op) { … } static int ccp5_perform_xts_aes(struct ccp_op *op) { … } static int ccp5_perform_sha(struct ccp_op *op) { … } static int ccp5_perform_des3(struct ccp_op *op) { … } static int ccp5_perform_rsa(struct ccp_op *op) { … } static int ccp5_perform_passthru(struct ccp_op *op) { … } static int ccp5_perform_ecc(struct ccp_op *op) { … } static int ccp_find_lsb_regions(struct ccp_cmd_queue *cmd_q, u64 status) { … } static int ccp_find_and_assign_lsb_to_q(struct ccp_device *ccp, int lsb_cnt, int n_lsbs, unsigned long *lsb_pub) { … } /* For each queue, from the most- to least-constrained: * find an LSB that can be assigned to the queue. If there are N queues that * can only use M LSBs, where N > M, fail; otherwise, every queue will get a * dedicated LSB. Remaining LSB regions become a shared resource. * If we have fewer LSBs than queues, all LSB regions become shared resources. */ static int ccp_assign_lsbs(struct ccp_device *ccp) { … } static void ccp5_disable_queue_interrupts(struct ccp_device *ccp) { … } static void ccp5_enable_queue_interrupts(struct ccp_device *ccp) { … } static void ccp5_irq_bh(unsigned long data) { … } static irqreturn_t ccp5_irq_handler(int irq, void *data) { … } static int ccp5_init(struct ccp_device *ccp) { … } static void ccp5_destroy(struct ccp_device *ccp) { … } static void ccp5_config(struct ccp_device *ccp) { … } static void ccp5other_config(struct ccp_device *ccp) { … } /* Version 5 adds some function, but is essentially the same as v5 */ static const struct ccp_actions ccp5_actions = …; const struct ccp_vdata ccpv5a = …; const struct ccp_vdata ccpv5b = …;
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