// SPDX-License-Identifier: GPL-2.0-only/* * AMD Cryptographic Coprocessor (CCP) driver * * Copyright (C) 2017 Advanced Micro Devices, Inc. * * Author: Gary R Hook <gary.hook@amd.com> */ #include <linux/debugfs.h>#include <linux/ccp.h> #include "ccp-dev.h" /* DebugFS helpers */#define	OBUFP		(obuf + oboff)#define	OBUFLEN		512#define	OBUFSPC		(OBUFLEN - oboff)#define	OSCNPRINTF(fmt, ...) \		scnprintf(OBUFP, OBUFSPC, fmt, ## __VA_ARGS__) #define BUFLEN	63 #define	RI_VERSION_NUM	0x0000003F#define	RI_AES_PRESENT	0x00000040#define	RI_3DES_PRESENT	0x00000080#define	RI_SHA_PRESENT	0x00000100#define	RI_RSA_PRESENT	0x00000200#define	RI_ECC_PRESENT	0x00000400#define	RI_ZDE_PRESENT	0x00000800#define	RI_ZCE_PRESENT	0x00001000#define	RI_TRNG_PRESENT	0x00002000#define	RI_ELFC_PRESENT	0x00004000#define	RI_ELFC_SHIFT	14#define	RI_NUM_VQM	0x00078000#define	RI_NVQM_SHIFT	15#define	RI_NVQM(r)	(((r) * RI_NUM_VQM) >> RI_NVQM_SHIFT)#define	RI_LSB_ENTRIES	0x0FF80000#define	RI_NLSB_SHIFT	19#define	RI_NLSB(r)	(((r) * RI_LSB_ENTRIES) >> RI_NLSB_SHIFT) static ssize_t ccp5_debugfs_info_read(struct file *filp, char __user *ubuf,				      size_t count, loff_t *offp){	struct ccp_device *ccp = filp->private_data;	unsigned int oboff = 0;	unsigned int regval;	ssize_t ret;	char *obuf; 	if (!ccp)		return 0; 	obuf = kmalloc(OBUFLEN, GFP_KERNEL);	if (!obuf)		return -ENOMEM; 	oboff += OSCNPRINTF("Device name: %s\n", ccp->name);	oboff += OSCNPRINTF("   RNG name: %s\n", ccp->rngname);	oboff += OSCNPRINTF("   # Queues: %d\n", ccp->cmd_q_count);	oboff += OSCNPRINTF("     # Cmds: %d\n", ccp->cmd_count); 	regval = ioread32(ccp->io_regs + CMD5_PSP_CCP_VERSION);	oboff += OSCNPRINTF("    Version: %d\n", regval & RI_VERSION_NUM);	oboff += OSCNPRINTF("    Engines:");	if (regval & RI_AES_PRESENT)		oboff += OSCNPRINTF(" AES");	if (regval & RI_3DES_PRESENT)		oboff += OSCNPRINTF(" 3DES");	if (regval & RI_SHA_PRESENT)		oboff += OSCNPRINTF(" SHA");	if (regval & RI_RSA_PRESENT)		oboff += OSCNPRINTF(" RSA");	if (regval & RI_ECC_PRESENT)		oboff += OSCNPRINTF(" ECC");	if (regval & RI_ZDE_PRESENT)		oboff += OSCNPRINTF(" ZDE");	if (regval & RI_ZCE_PRESENT)		oboff += OSCNPRINTF(" ZCE");	if (regval & RI_TRNG_PRESENT)		oboff += OSCNPRINTF(" TRNG");	oboff += OSCNPRINTF("\n");	oboff += OSCNPRINTF("     Queues: %d\n",		   (regval & RI_NUM_VQM) >> RI_NVQM_SHIFT);	oboff += OSCNPRINTF("LSB Entries: %d\n",		   (regval & RI_LSB_ENTRIES) >> RI_NLSB_SHIFT); 	ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);	kfree(obuf); 	return ret;} /* Return a formatted buffer containing the current * statistics across all queues for a CCP. */static ssize_t ccp5_debugfs_stats_read(struct file *filp, char __user *ubuf,				       size_t count, loff_t *offp){	struct ccp_device *ccp = filp->private_data;	unsigned long total_xts_aes_ops = 0;	unsigned long total_3des_ops = 0;	unsigned long total_aes_ops = 0;	unsigned long total_sha_ops = 0;	unsigned long total_rsa_ops = 0;	unsigned long total_ecc_ops = 0;	unsigned long total_pt_ops = 0;	unsigned long total_ops = 0;	unsigned int oboff = 0;	ssize_t ret = 0;	unsigned int i;	char *obuf; 	for (i = 0; i < ccp->cmd_q_count; i++) {		struct ccp_cmd_queue *cmd_q = &ccp->cmd_q[i]; 		total_ops += cmd_q->total_ops;		total_aes_ops += cmd_q->total_aes_ops;		total_xts_aes_ops += cmd_q->total_xts_aes_ops;		total_3des_ops += cmd_q->total_3des_ops;		total_sha_ops += cmd_q->total_sha_ops;		total_rsa_ops += cmd_q->total_rsa_ops;		total_pt_ops += cmd_q->total_pt_ops;		total_ecc_ops += cmd_q->total_ecc_ops;	} 	obuf = kmalloc(OBUFLEN, GFP_KERNEL);	if (!obuf)		return -ENOMEM; 	oboff += OSCNPRINTF("Total Interrupts Handled: %ld\n",			    ccp->total_interrupts);	oboff += OSCNPRINTF("        Total Operations: %ld\n",			    total_ops);	oboff += OSCNPRINTF("                     AES: %ld\n",			    total_aes_ops);	oboff += OSCNPRINTF("                 XTS AES: %ld\n",			    total_xts_aes_ops);	oboff += OSCNPRINTF("                     SHA: %ld\n",			    total_3des_ops);	oboff += OSCNPRINTF("                     SHA: %ld\n",			    total_sha_ops);	oboff += OSCNPRINTF("                     RSA: %ld\n",			    total_rsa_ops);	oboff += OSCNPRINTF("               Pass-Thru: %ld\n",			    total_pt_ops);	oboff += OSCNPRINTF("                     ECC: %ld\n",			    total_ecc_ops); 	ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);	kfree(obuf); 	return ret;} /* Reset the counters in a queue */static void ccp5_debugfs_reset_queue_stats(struct ccp_cmd_queue *cmd_q){	cmd_q->total_ops = 0L;	cmd_q->total_aes_ops = 0L;	cmd_q->total_xts_aes_ops = 0L;	cmd_q->total_3des_ops = 0L;	cmd_q->total_sha_ops = 0L;	cmd_q->total_rsa_ops = 0L;	cmd_q->total_pt_ops = 0L;	cmd_q->total_ecc_ops = 0L;} /* A value was written to the stats variable, which * should be used to reset the queue counters across * that device. */static ssize_t ccp5_debugfs_stats_write(struct file *filp,					const char __user *ubuf,					size_t count, loff_t *offp){	struct ccp_device *ccp = filp->private_data;	int i; 	for (i = 0; i < ccp->cmd_q_count; i++)		ccp5_debugfs_reset_queue_stats(&ccp->cmd_q[i]);	ccp->total_interrupts = 0L; 	return count;} /* Return a formatted buffer containing the current information * for that queue */static ssize_t ccp5_debugfs_queue_read(struct file *filp, char __user *ubuf,				       size_t count, loff_t *offp){	struct ccp_cmd_queue *cmd_q = filp->private_data;	unsigned int oboff = 0;	unsigned int regval;	ssize_t ret;	char *obuf; 	if (!cmd_q)		return 0; 	obuf = kmalloc(OBUFLEN, GFP_KERNEL);	if (!obuf)		return -ENOMEM; 	oboff += OSCNPRINTF("  Total Queue Operations: %ld\n",			    cmd_q->total_ops);	oboff += OSCNPRINTF("                     AES: %ld\n",			    cmd_q->total_aes_ops);	oboff += OSCNPRINTF("                 XTS AES: %ld\n",			    cmd_q->total_xts_aes_ops);	oboff += OSCNPRINTF("                     SHA: %ld\n",			    cmd_q->total_3des_ops);	oboff += OSCNPRINTF("                     SHA: %ld\n",			    cmd_q->total_sha_ops);	oboff += OSCNPRINTF("                     RSA: %ld\n",			    cmd_q->total_rsa_ops);	oboff += OSCNPRINTF("               Pass-Thru: %ld\n",			    cmd_q->total_pt_ops);	oboff += OSCNPRINTF("                     ECC: %ld\n",			    cmd_q->total_ecc_ops); 	regval = ioread32(cmd_q->reg_int_enable);	oboff += OSCNPRINTF("      Enabled Interrupts:");	if (regval & INT_EMPTY_QUEUE)		oboff += OSCNPRINTF(" EMPTY");	if (regval & INT_QUEUE_STOPPED)		oboff += OSCNPRINTF(" STOPPED");	if (regval & INT_ERROR)		oboff += OSCNPRINTF(" ERROR");	if (regval & INT_COMPLETION)		oboff += OSCNPRINTF(" COMPLETION");	oboff += OSCNPRINTF("\n"); 	ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);	kfree(obuf); 	return ret;} /* A value was written to the stats variable for a * queue. Reset the queue counters to this value. */static ssize_t ccp5_debugfs_queue_write(struct file *filp,					const char __user *ubuf,					size_t count, loff_t *offp){	struct ccp_cmd_queue *cmd_q = filp->private_data; 	ccp5_debugfs_reset_queue_stats(cmd_q); 	return count;} static const struct file_operations ccp_debugfs_info_ops = {	.owner = THIS_MODULE,	.open = simple_open,	.read = ccp5_debugfs_info_read,	.write = NULL,}; static const struct file_operations ccp_debugfs_queue_ops = {	.owner = THIS_MODULE,	.open = simple_open,	.read = ccp5_debugfs_queue_read,	.write = ccp5_debugfs_queue_write,}; static const struct file_operations ccp_debugfs_stats_ops = {	.owner = THIS_MODULE,	.open = simple_open,	.read = ccp5_debugfs_stats_read,	.write = ccp5_debugfs_stats_write,}; static struct dentry *ccp_debugfs_dir;static DEFINE_MUTEX(ccp_debugfs_lock); #define	MAX_NAME_LEN	20 void ccp5_debugfs_setup(struct ccp_device *ccp){	struct ccp_cmd_queue *cmd_q;	char name[MAX_NAME_LEN + 1];	struct dentry *debugfs_q_instance;	int i; 	if (!debugfs_initialized())		return; 	mutex_lock(&ccp_debugfs_lock);	if (!ccp_debugfs_dir)		ccp_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);	mutex_unlock(&ccp_debugfs_lock); 	ccp->debugfs_instance = debugfs_create_dir(ccp->name, ccp_debugfs_dir); 	debugfs_create_file("info", 0400, ccp->debugfs_instance, ccp,			    &ccp_debugfs_info_ops); 	debugfs_create_file("stats", 0600, ccp->debugfs_instance, ccp,			    &ccp_debugfs_stats_ops); 	for (i = 0; i < ccp->cmd_q_count; i++) {		cmd_q = &ccp->cmd_q[i]; 		snprintf(name, MAX_NAME_LEN - 1, "q%d", cmd_q->id); 		debugfs_q_instance =			debugfs_create_dir(name, ccp->debugfs_instance); 		debugfs_create_file("stats", 0600, debugfs_q_instance, cmd_q,				    &ccp_debugfs_queue_ops);	} 	return;} void ccp5_debugfs_destroy(void){	mutex_lock(&ccp_debugfs_lock);	debugfs_remove_recursive(ccp_debugfs_dir);	ccp_debugfs_dir = NULL;	mutex_unlock(&ccp_debugfs_lock);}