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