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path: root/drivers/crypto/msm/qcedev.c
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Diffstat (limited to 'drivers/crypto/msm/qcedev.c')
-rw-r--r--drivers/crypto/msm/qcedev.c2111
1 files changed, 2111 insertions, 0 deletions
diff --git a/drivers/crypto/msm/qcedev.c b/drivers/crypto/msm/qcedev.c
new file mode 100644
index 000000000000..20bf034bb193
--- /dev/null
+++ b/drivers/crypto/msm/qcedev.c
@@ -0,0 +1,2111 @@
+/* Qualcomm CE device driver.
+ *
+ * Copyright (c) 2010-2017, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/mman.h>
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/dmapool.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/uaccess.h>
+#include <linux/debugfs.h>
+#include <linux/scatterlist.h>
+#include <linux/crypto.h>
+#include <linux/platform_data/qcom_crypto_device.h>
+#include <linux/msm-bus.h>
+#include <linux/qcedev.h>
+
+#include <crypto/hash.h>
+#include "qcedevi.h"
+#include "qce.h"
+
+#include <linux/compat.h>
+#include "compat_qcedev.h"
+
+#define CACHE_LINE_SIZE 32
+#define CE_SHA_BLOCK_SIZE SHA256_BLOCK_SIZE
+
+static uint8_t _std_init_vector_sha1_uint8[] = {
+ 0x67, 0x45, 0x23, 0x01, 0xEF, 0xCD, 0xAB, 0x89,
+ 0x98, 0xBA, 0xDC, 0xFE, 0x10, 0x32, 0x54, 0x76,
+ 0xC3, 0xD2, 0xE1, 0xF0
+};
+/* standard initialization vector for SHA-256, source: FIPS 180-2 */
+static uint8_t _std_init_vector_sha256_uint8[] = {
+ 0x6A, 0x09, 0xE6, 0x67, 0xBB, 0x67, 0xAE, 0x85,
+ 0x3C, 0x6E, 0xF3, 0x72, 0xA5, 0x4F, 0xF5, 0x3A,
+ 0x51, 0x0E, 0x52, 0x7F, 0x9B, 0x05, 0x68, 0x8C,
+ 0x1F, 0x83, 0xD9, 0xAB, 0x5B, 0xE0, 0xCD, 0x19
+};
+
+static DEFINE_MUTEX(send_cmd_lock);
+static DEFINE_MUTEX(qcedev_sent_bw_req);
+static DEFINE_MUTEX(hash_access_lock);
+
+static void qcedev_ce_high_bw_req(struct qcedev_control *podev,
+ bool high_bw_req)
+{
+ int ret = 0;
+
+ mutex_lock(&qcedev_sent_bw_req);
+ if (high_bw_req) {
+ if (podev->high_bw_req_count == 0) {
+ ret = qce_enable_clk(podev->qce);
+ if (ret) {
+ pr_err("%s Unable enable clk\n", __func__);
+ mutex_unlock(&qcedev_sent_bw_req);
+ return;
+ }
+ ret = msm_bus_scale_client_update_request(
+ podev->bus_scale_handle, 1);
+ if (ret) {
+ pr_err("%s Unable to set to high bandwidth\n",
+ __func__);
+ ret = qce_disable_clk(podev->qce);
+ mutex_unlock(&qcedev_sent_bw_req);
+ return;
+ }
+ }
+ podev->high_bw_req_count++;
+ } else {
+ if (podev->high_bw_req_count == 1) {
+ ret = msm_bus_scale_client_update_request(
+ podev->bus_scale_handle, 0);
+ if (ret) {
+ pr_err("%s Unable to set to low bandwidth\n",
+ __func__);
+ mutex_unlock(&qcedev_sent_bw_req);
+ return;
+ }
+ ret = qce_disable_clk(podev->qce);
+ if (ret) {
+ pr_err("%s Unable disable clk\n", __func__);
+ ret = msm_bus_scale_client_update_request(
+ podev->bus_scale_handle, 1);
+ if (ret)
+ pr_err("%s Unable to set to high bandwidth\n",
+ __func__);
+ mutex_unlock(&qcedev_sent_bw_req);
+ return;
+ }
+ }
+ podev->high_bw_req_count--;
+ }
+ mutex_unlock(&qcedev_sent_bw_req);
+}
+
+#define QCEDEV_MAGIC 0x56434544 /* "qced" */
+
+static int qcedev_open(struct inode *inode, struct file *file);
+static int qcedev_release(struct inode *inode, struct file *file);
+static int start_cipher_req(struct qcedev_control *podev);
+static int start_sha_req(struct qcedev_control *podev);
+
+static const struct file_operations qcedev_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = qcedev_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = compat_qcedev_ioctl,
+#endif
+ .open = qcedev_open,
+ .release = qcedev_release,
+};
+
+static struct qcedev_control qce_dev[] = {
+ {
+ .miscdevice = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "qce",
+ .fops = &qcedev_fops,
+ },
+ .magic = QCEDEV_MAGIC,
+ },
+};
+
+#define MAX_QCE_DEVICE ARRAY_SIZE(qce_dev)
+#define DEBUG_MAX_FNAME 16
+#define DEBUG_MAX_RW_BUF 1024
+
+struct qcedev_stat {
+ u32 qcedev_dec_success;
+ u32 qcedev_dec_fail;
+ u32 qcedev_enc_success;
+ u32 qcedev_enc_fail;
+ u32 qcedev_sha_success;
+ u32 qcedev_sha_fail;
+};
+
+static struct qcedev_stat _qcedev_stat;
+static struct dentry *_debug_dent;
+static char _debug_read_buf[DEBUG_MAX_RW_BUF];
+static int _debug_qcedev;
+
+static struct qcedev_control *qcedev_minor_to_control(unsigned n)
+{
+ int i;
+
+ for (i = 0; i < MAX_QCE_DEVICE; i++) {
+ if (qce_dev[i].miscdevice.minor == n)
+ return &qce_dev[i];
+ }
+ return NULL;
+}
+
+static int qcedev_open(struct inode *inode, struct file *file)
+{
+ struct qcedev_handle *handle;
+ struct qcedev_control *podev;
+
+ podev = qcedev_minor_to_control(MINOR(inode->i_rdev));
+ if (podev == NULL) {
+ pr_err("%s: no such device %d\n", __func__,
+ MINOR(inode->i_rdev));
+ return -ENOENT;
+ }
+
+ handle = kzalloc(sizeof(struct qcedev_handle), GFP_KERNEL);
+ if (handle == NULL) {
+ pr_err("Failed to allocate memory %ld\n",
+ PTR_ERR(handle));
+ return -ENOMEM;
+ }
+
+ handle->cntl = podev;
+ file->private_data = handle;
+ if (podev->platform_support.bus_scale_table != NULL)
+ qcedev_ce_high_bw_req(podev, true);
+ return 0;
+}
+
+static int qcedev_release(struct inode *inode, struct file *file)
+{
+ struct qcedev_control *podev;
+ struct qcedev_handle *handle;
+
+ handle = file->private_data;
+ podev = handle->cntl;
+ if (podev != NULL && podev->magic != QCEDEV_MAGIC) {
+ pr_err("%s: invalid handle %pK\n",
+ __func__, podev);
+ }
+ kzfree(handle);
+ file->private_data = NULL;
+ if (podev != NULL && podev->platform_support.bus_scale_table != NULL)
+ qcedev_ce_high_bw_req(podev, false);
+ return 0;
+}
+
+static void req_done(unsigned long data)
+{
+ struct qcedev_control *podev = (struct qcedev_control *)data;
+ struct qcedev_async_req *areq;
+ unsigned long flags = 0;
+ struct qcedev_async_req *new_req = NULL;
+ int ret = 0;
+
+ spin_lock_irqsave(&podev->lock, flags);
+ areq = podev->active_command;
+ podev->active_command = NULL;
+
+again:
+ if (!list_empty(&podev->ready_commands)) {
+ new_req = container_of(podev->ready_commands.next,
+ struct qcedev_async_req, list);
+ list_del(&new_req->list);
+ podev->active_command = new_req;
+ new_req->err = 0;
+ if (new_req->op_type == QCEDEV_CRYPTO_OPER_CIPHER)
+ ret = start_cipher_req(podev);
+ else
+ ret = start_sha_req(podev);
+ }
+
+ spin_unlock_irqrestore(&podev->lock, flags);
+
+ if (areq)
+ complete(&areq->complete);
+
+ if (new_req && ret) {
+ complete(&new_req->complete);
+ spin_lock_irqsave(&podev->lock, flags);
+ podev->active_command = NULL;
+ areq = NULL;
+ ret = 0;
+ new_req = NULL;
+ goto again;
+ }
+
+ return;
+}
+
+void qcedev_sha_req_cb(void *cookie, unsigned char *digest,
+ unsigned char *authdata, int ret)
+{
+ struct qcedev_sha_req *areq;
+ struct qcedev_control *pdev;
+ struct qcedev_handle *handle;
+
+ uint32_t *auth32 = (uint32_t *)authdata;
+
+ areq = (struct qcedev_sha_req *) cookie;
+ handle = (struct qcedev_handle *) areq->cookie;
+ pdev = handle->cntl;
+
+ if (digest)
+ memcpy(&handle->sha_ctxt.digest[0], digest, 32);
+
+ if (authdata) {
+ handle->sha_ctxt.auth_data[0] = auth32[0];
+ handle->sha_ctxt.auth_data[1] = auth32[1];
+ handle->sha_ctxt.auth_data[2] = auth32[2];
+ handle->sha_ctxt.auth_data[3] = auth32[3];
+ }
+
+ tasklet_schedule(&pdev->done_tasklet);
+};
+
+
+void qcedev_cipher_req_cb(void *cookie, unsigned char *icv,
+ unsigned char *iv, int ret)
+{
+ struct qcedev_cipher_req *areq;
+ struct qcedev_handle *handle;
+ struct qcedev_control *podev;
+ struct qcedev_async_req *qcedev_areq;
+
+ areq = (struct qcedev_cipher_req *) cookie;
+ handle = (struct qcedev_handle *) areq->cookie;
+ podev = handle->cntl;
+ qcedev_areq = podev->active_command;
+
+ if (iv)
+ memcpy(&qcedev_areq->cipher_op_req.iv[0], iv,
+ qcedev_areq->cipher_op_req.ivlen);
+ tasklet_schedule(&podev->done_tasklet);
+};
+
+static int start_cipher_req(struct qcedev_control *podev)
+{
+ struct qcedev_async_req *qcedev_areq;
+ struct qce_req creq;
+ int ret = 0;
+
+ /* start the command on the podev->active_command */
+ qcedev_areq = podev->active_command;
+ qcedev_areq->cipher_req.cookie = qcedev_areq->handle;
+ if (qcedev_areq->cipher_op_req.use_pmem == QCEDEV_USE_PMEM) {
+ pr_err("%s: Use of PMEM is not supported\n", __func__);
+ goto unsupported;
+ }
+ creq.pmem = NULL;
+ switch (qcedev_areq->cipher_op_req.alg) {
+ case QCEDEV_ALG_DES:
+ creq.alg = CIPHER_ALG_DES;
+ break;
+ case QCEDEV_ALG_3DES:
+ creq.alg = CIPHER_ALG_3DES;
+ break;
+ case QCEDEV_ALG_AES:
+ creq.alg = CIPHER_ALG_AES;
+ break;
+ default:
+ return -EINVAL;
+ };
+
+ switch (qcedev_areq->cipher_op_req.mode) {
+ case QCEDEV_AES_MODE_CBC:
+ case QCEDEV_DES_MODE_CBC:
+ creq.mode = QCE_MODE_CBC;
+ break;
+ case QCEDEV_AES_MODE_ECB:
+ case QCEDEV_DES_MODE_ECB:
+ creq.mode = QCE_MODE_ECB;
+ break;
+ case QCEDEV_AES_MODE_CTR:
+ creq.mode = QCE_MODE_CTR;
+ break;
+ case QCEDEV_AES_MODE_XTS:
+ creq.mode = QCE_MODE_XTS;
+ break;
+ default:
+ return -EINVAL;
+ };
+
+ if ((creq.alg == CIPHER_ALG_AES) &&
+ (creq.mode == QCE_MODE_CTR)) {
+ creq.dir = QCE_ENCRYPT;
+ } else {
+ if (QCEDEV_OPER_ENC == qcedev_areq->cipher_op_req.op)
+ creq.dir = QCE_ENCRYPT;
+ else
+ creq.dir = QCE_DECRYPT;
+ }
+
+ creq.iv = &qcedev_areq->cipher_op_req.iv[0];
+ creq.ivsize = qcedev_areq->cipher_op_req.ivlen;
+
+ creq.enckey = &qcedev_areq->cipher_op_req.enckey[0];
+ creq.encklen = qcedev_areq->cipher_op_req.encklen;
+
+ creq.cryptlen = qcedev_areq->cipher_op_req.data_len;
+
+ if (qcedev_areq->cipher_op_req.encklen == 0) {
+ if ((qcedev_areq->cipher_op_req.op == QCEDEV_OPER_ENC_NO_KEY)
+ || (qcedev_areq->cipher_op_req.op ==
+ QCEDEV_OPER_DEC_NO_KEY))
+ creq.op = QCE_REQ_ABLK_CIPHER_NO_KEY;
+ else {
+ int i;
+
+ for (i = 0; i < QCEDEV_MAX_KEY_SIZE; i++) {
+ if (qcedev_areq->cipher_op_req.enckey[i] != 0)
+ break;
+ }
+
+ if ((podev->platform_support.hw_key_support == 1) &&
+ (i == QCEDEV_MAX_KEY_SIZE))
+ creq.op = QCE_REQ_ABLK_CIPHER;
+ else {
+ ret = -EINVAL;
+ goto unsupported;
+ }
+ }
+ } else {
+ creq.op = QCE_REQ_ABLK_CIPHER;
+ }
+
+ creq.qce_cb = qcedev_cipher_req_cb;
+ creq.areq = (void *)&qcedev_areq->cipher_req;
+ creq.flags = 0;
+ ret = qce_ablk_cipher_req(podev->qce, &creq);
+unsupported:
+ if (ret)
+ qcedev_areq->err = -ENXIO;
+ else
+ qcedev_areq->err = 0;
+ return ret;
+};
+
+static int start_sha_req(struct qcedev_control *podev)
+{
+ struct qcedev_async_req *qcedev_areq;
+ struct qce_sha_req sreq;
+ int ret = 0;
+ struct qcedev_handle *handle;
+
+ /* start the command on the podev->active_command */
+ qcedev_areq = podev->active_command;
+ handle = qcedev_areq->handle;
+
+ switch (qcedev_areq->sha_op_req.alg) {
+ case QCEDEV_ALG_SHA1:
+ sreq.alg = QCE_HASH_SHA1;
+ break;
+ case QCEDEV_ALG_SHA256:
+ sreq.alg = QCE_HASH_SHA256;
+ break;
+ case QCEDEV_ALG_SHA1_HMAC:
+ if (podev->ce_support.sha_hmac) {
+ sreq.alg = QCE_HASH_SHA1_HMAC;
+ sreq.authkey = &handle->sha_ctxt.authkey[0];
+ sreq.authklen = QCEDEV_MAX_SHA_BLOCK_SIZE;
+
+ } else {
+ sreq.alg = QCE_HASH_SHA1;
+ sreq.authkey = NULL;
+ }
+ break;
+ case QCEDEV_ALG_SHA256_HMAC:
+ if (podev->ce_support.sha_hmac) {
+ sreq.alg = QCE_HASH_SHA256_HMAC;
+ sreq.authkey = &handle->sha_ctxt.authkey[0];
+ sreq.authklen = QCEDEV_MAX_SHA_BLOCK_SIZE;
+ } else {
+ sreq.alg = QCE_HASH_SHA256;
+ sreq.authkey = NULL;
+ }
+ break;
+ case QCEDEV_ALG_AES_CMAC:
+ sreq.alg = QCE_HASH_AES_CMAC;
+ sreq.authkey = &handle->sha_ctxt.authkey[0];
+ sreq.authklen = qcedev_areq->sha_op_req.authklen;
+ break;
+ default:
+ pr_err("Algorithm %d not supported, exiting\n",
+ qcedev_areq->sha_op_req.alg);
+ return -EINVAL;
+ break;
+ };
+
+ qcedev_areq->sha_req.cookie = handle;
+
+ sreq.qce_cb = qcedev_sha_req_cb;
+ if (qcedev_areq->sha_op_req.alg != QCEDEV_ALG_AES_CMAC) {
+ sreq.auth_data[0] = handle->sha_ctxt.auth_data[0];
+ sreq.auth_data[1] = handle->sha_ctxt.auth_data[1];
+ sreq.auth_data[2] = handle->sha_ctxt.auth_data[2];
+ sreq.auth_data[3] = handle->sha_ctxt.auth_data[3];
+ sreq.digest = &handle->sha_ctxt.digest[0];
+ sreq.first_blk = handle->sha_ctxt.first_blk;
+ sreq.last_blk = handle->sha_ctxt.last_blk;
+ }
+ sreq.size = qcedev_areq->sha_req.sreq.nbytes;
+ sreq.src = qcedev_areq->sha_req.sreq.src;
+ sreq.areq = (void *)&qcedev_areq->sha_req;
+ sreq.flags = 0;
+
+ ret = qce_process_sha_req(podev->qce, &sreq);
+
+ if (ret)
+ qcedev_areq->err = -ENXIO;
+ else
+ qcedev_areq->err = 0;
+ return ret;
+};
+
+static int submit_req(struct qcedev_async_req *qcedev_areq,
+ struct qcedev_handle *handle)
+{
+ struct qcedev_control *podev;
+ unsigned long flags = 0;
+ int ret = 0;
+ struct qcedev_stat *pstat;
+
+ qcedev_areq->err = 0;
+ podev = handle->cntl;
+
+ spin_lock_irqsave(&podev->lock, flags);
+
+ if (podev->active_command == NULL) {
+ podev->active_command = qcedev_areq;
+ if (qcedev_areq->op_type == QCEDEV_CRYPTO_OPER_CIPHER)
+ ret = start_cipher_req(podev);
+ else
+ ret = start_sha_req(podev);
+ } else {
+ list_add_tail(&qcedev_areq->list, &podev->ready_commands);
+ }
+
+ if (ret != 0)
+ podev->active_command = NULL;
+
+ spin_unlock_irqrestore(&podev->lock, flags);
+
+ if (ret == 0)
+ wait_for_completion(&qcedev_areq->complete);
+
+ if (ret)
+ qcedev_areq->err = -EIO;
+
+ pstat = &_qcedev_stat;
+ if (qcedev_areq->op_type == QCEDEV_CRYPTO_OPER_CIPHER) {
+ switch (qcedev_areq->cipher_op_req.op) {
+ case QCEDEV_OPER_DEC:
+ if (qcedev_areq->err)
+ pstat->qcedev_dec_fail++;
+ else
+ pstat->qcedev_dec_success++;
+ break;
+ case QCEDEV_OPER_ENC:
+ if (qcedev_areq->err)
+ pstat->qcedev_enc_fail++;
+ else
+ pstat->qcedev_enc_success++;
+ break;
+ default:
+ break;
+ };
+ } else {
+ if (qcedev_areq->err)
+ pstat->qcedev_sha_fail++;
+ else
+ pstat->qcedev_sha_success++;
+ }
+
+ return qcedev_areq->err;
+}
+
+static int qcedev_sha_init(struct qcedev_async_req *areq,
+ struct qcedev_handle *handle)
+{
+ struct qcedev_sha_ctxt *sha_ctxt = &handle->sha_ctxt;
+
+ memset(sha_ctxt, 0, sizeof(struct qcedev_sha_ctxt));
+ sha_ctxt->first_blk = 1;
+
+ if ((areq->sha_op_req.alg == QCEDEV_ALG_SHA1) ||
+ (areq->sha_op_req.alg == QCEDEV_ALG_SHA1_HMAC)) {
+ memcpy(&sha_ctxt->digest[0],
+ &_std_init_vector_sha1_uint8[0], SHA1_DIGEST_SIZE);
+ sha_ctxt->diglen = SHA1_DIGEST_SIZE;
+ } else {
+ if ((areq->sha_op_req.alg == QCEDEV_ALG_SHA256) ||
+ (areq->sha_op_req.alg == QCEDEV_ALG_SHA256_HMAC)) {
+ memcpy(&sha_ctxt->digest[0],
+ &_std_init_vector_sha256_uint8[0],
+ SHA256_DIGEST_SIZE);
+ sha_ctxt->diglen = SHA256_DIGEST_SIZE;
+ }
+ }
+ sha_ctxt->init_done = true;
+ return 0;
+}
+
+
+static int qcedev_sha_update_max_xfer(struct qcedev_async_req *qcedev_areq,
+ struct qcedev_handle *handle,
+ struct scatterlist *sg_src)
+{
+ int err = 0;
+ int i = 0;
+ uint32_t total;
+
+ uint8_t *user_src = NULL;
+ uint8_t *k_src = NULL;
+ uint8_t *k_buf_src = NULL;
+ uint8_t *k_align_src = NULL;
+
+ uint32_t sha_pad_len = 0;
+ uint32_t trailing_buf_len = 0;
+ uint32_t t_buf = handle->sha_ctxt.trailing_buf_len;
+ uint32_t sha_block_size;
+
+ total = qcedev_areq->sha_op_req.data_len + t_buf;
+
+ if (qcedev_areq->sha_op_req.alg == QCEDEV_ALG_SHA1)
+ sha_block_size = SHA1_BLOCK_SIZE;
+ else
+ sha_block_size = SHA256_BLOCK_SIZE;
+
+ if (total <= sha_block_size) {
+ uint32_t len = qcedev_areq->sha_op_req.data_len;
+
+ i = 0;
+
+ k_src = &handle->sha_ctxt.trailing_buf[t_buf];
+
+ /* Copy data from user src(s) */
+ while (len > 0) {
+ user_src =
+ (void __user *)qcedev_areq->sha_op_req.data[i].vaddr;
+ if (user_src && copy_from_user(k_src,
+ (void __user *)user_src,
+ qcedev_areq->sha_op_req.data[i].len))
+ return -EFAULT;
+
+ len -= qcedev_areq->sha_op_req.data[i].len;
+ k_src += qcedev_areq->sha_op_req.data[i].len;
+ i++;
+ }
+ handle->sha_ctxt.trailing_buf_len = total;
+
+ return 0;
+ }
+
+
+ k_buf_src = kmalloc(total + CACHE_LINE_SIZE * 2,
+ GFP_KERNEL);
+ if (k_buf_src == NULL) {
+ pr_err("%s: Can't Allocate memory: k_buf_src 0x%lx\n",
+ __func__, (uintptr_t)k_buf_src);
+ return -ENOMEM;
+ }
+
+ k_align_src = (uint8_t *)ALIGN(((uintptr_t)k_buf_src),
+ CACHE_LINE_SIZE);
+ k_src = k_align_src;
+
+ /* check for trailing buffer from previous updates and append it */
+ if (t_buf > 0) {
+ memcpy(k_src, &handle->sha_ctxt.trailing_buf[0],
+ t_buf);
+ k_src += t_buf;
+ }
+
+ /* Copy data from user src(s) */
+ user_src = (void __user *)qcedev_areq->sha_op_req.data[0].vaddr;
+ if (user_src && copy_from_user(k_src,
+ (void __user *)user_src,
+ qcedev_areq->sha_op_req.data[0].len)) {
+ kzfree(k_buf_src);
+ return -EFAULT;
+ }
+ k_src += qcedev_areq->sha_op_req.data[0].len;
+ for (i = 1; i < qcedev_areq->sha_op_req.entries; i++) {
+ user_src = (void __user *)qcedev_areq->sha_op_req.data[i].vaddr;
+ if (user_src && copy_from_user(k_src,
+ (void __user *)user_src,
+ qcedev_areq->sha_op_req.data[i].len)) {
+ kzfree(k_buf_src);
+ return -EFAULT;
+ }
+ k_src += qcedev_areq->sha_op_req.data[i].len;
+ }
+
+ /* get new trailing buffer */
+ sha_pad_len = ALIGN(total, CE_SHA_BLOCK_SIZE) - total;
+ trailing_buf_len = CE_SHA_BLOCK_SIZE - sha_pad_len;
+
+ qcedev_areq->sha_req.sreq.src = sg_src;
+ sg_set_buf(qcedev_areq->sha_req.sreq.src, k_align_src,
+ total-trailing_buf_len);
+ sg_mark_end(qcedev_areq->sha_req.sreq.src);
+
+ qcedev_areq->sha_req.sreq.nbytes = total - trailing_buf_len;
+
+ /* update sha_ctxt trailing buf content to new trailing buf */
+ if (trailing_buf_len > 0) {
+ memset(&handle->sha_ctxt.trailing_buf[0], 0, 64);
+ memcpy(&handle->sha_ctxt.trailing_buf[0],
+ (k_src - trailing_buf_len),
+ trailing_buf_len);
+ }
+ handle->sha_ctxt.trailing_buf_len = trailing_buf_len;
+
+ err = submit_req(qcedev_areq, handle);
+
+ handle->sha_ctxt.last_blk = 0;
+ handle->sha_ctxt.first_blk = 0;
+
+ kzfree(k_buf_src);
+ return err;
+}
+
+static int qcedev_sha_update(struct qcedev_async_req *qcedev_areq,
+ struct qcedev_handle *handle,
+ struct scatterlist *sg_src)
+{
+ int err = 0;
+ int i = 0;
+ int j = 0;
+ int k = 0;
+ int num_entries = 0;
+ uint32_t total = 0;
+
+ if (handle->sha_ctxt.init_done == false) {
+ pr_err("%s Init was not called\n", __func__);
+ return -EINVAL;
+ }
+
+ if (qcedev_areq->sha_op_req.data_len > QCE_MAX_OPER_DATA) {
+
+ struct qcedev_sha_op_req *saved_req;
+ struct qcedev_sha_op_req req;
+ struct qcedev_sha_op_req *sreq = &qcedev_areq->sha_op_req;
+
+ /* save the original req structure */
+ saved_req =
+ kmalloc(sizeof(struct qcedev_sha_op_req), GFP_KERNEL);
+ if (saved_req == NULL) {
+ pr_err("%s:Can't Allocate mem:saved_req 0x%lx\n",
+ __func__, (uintptr_t)saved_req);
+ return -ENOMEM;
+ }
+ memcpy(&req, sreq, sizeof(struct qcedev_sha_op_req));
+ memcpy(saved_req, sreq, sizeof(struct qcedev_sha_op_req));
+
+ i = 0;
+ /* Address 32 KB at a time */
+ while ((i < req.entries) && (err == 0)) {
+ if (sreq->data[i].len > QCE_MAX_OPER_DATA) {
+ sreq->data[0].len = QCE_MAX_OPER_DATA;
+ if (i > 0) {
+ sreq->data[0].vaddr =
+ sreq->data[i].vaddr;
+ }
+
+ sreq->data_len = QCE_MAX_OPER_DATA;
+ sreq->entries = 1;
+
+ err = qcedev_sha_update_max_xfer(qcedev_areq,
+ handle, sg_src);
+
+ sreq->data[i].len = req.data[i].len -
+ QCE_MAX_OPER_DATA;
+ sreq->data[i].vaddr = req.data[i].vaddr +
+ QCE_MAX_OPER_DATA;
+ req.data[i].vaddr = sreq->data[i].vaddr;
+ req.data[i].len = sreq->data[i].len;
+ } else {
+ total = 0;
+ for (j = i; j < req.entries; j++) {
+ num_entries++;
+ if ((total + sreq->data[j].len) >=
+ QCE_MAX_OPER_DATA) {
+ sreq->data[j].len =
+ (QCE_MAX_OPER_DATA - total);
+ total = QCE_MAX_OPER_DATA;
+ break;
+ }
+ total += sreq->data[j].len;
+ }
+
+ sreq->data_len = total;
+ if (i > 0)
+ for (k = 0; k < num_entries; k++) {
+ sreq->data[k].len =
+ sreq->data[i+k].len;
+ sreq->data[k].vaddr =
+ sreq->data[i+k].vaddr;
+ }
+ sreq->entries = num_entries;
+
+ i = j;
+ err = qcedev_sha_update_max_xfer(qcedev_areq,
+ handle, sg_src);
+ num_entries = 0;
+
+ sreq->data[i].vaddr = req.data[i].vaddr +
+ sreq->data[i].len;
+ sreq->data[i].len = req.data[i].len -
+ sreq->data[i].len;
+ req.data[i].vaddr = sreq->data[i].vaddr;
+ req.data[i].len = sreq->data[i].len;
+
+ if (sreq->data[i].len == 0)
+ i++;
+ }
+ } /* end of while ((i < req.entries) && (err == 0)) */
+
+ /* Restore the original req structure */
+ for (i = 0; i < saved_req->entries; i++) {
+ sreq->data[i].len = saved_req->data[i].len;
+ sreq->data[i].vaddr = saved_req->data[i].vaddr;
+ }
+ sreq->entries = saved_req->entries;
+ sreq->data_len = saved_req->data_len;
+ kzfree(saved_req);
+ } else
+ err = qcedev_sha_update_max_xfer(qcedev_areq, handle, sg_src);
+
+ return err;
+}
+
+static int qcedev_sha_final(struct qcedev_async_req *qcedev_areq,
+ struct qcedev_handle *handle)
+{
+ int err = 0;
+ struct scatterlist sg_src;
+ uint32_t total;
+ uint8_t *k_buf_src = NULL;
+ uint8_t *k_align_src = NULL;
+
+ if (handle->sha_ctxt.init_done == false) {
+ pr_err("%s Init was not called\n", __func__);
+ return -EINVAL;
+ }
+
+ handle->sha_ctxt.last_blk = 1;
+
+ total = handle->sha_ctxt.trailing_buf_len;
+
+ if (total) {
+ k_buf_src = kmalloc(total + CACHE_LINE_SIZE * 2,
+ GFP_KERNEL);
+ if (k_buf_src == NULL) {
+ pr_err("%s: Can't Allocate memory: k_buf_src 0x%lx\n",
+ __func__, (uintptr_t)k_buf_src);
+ return -ENOMEM;
+ }
+
+ k_align_src = (uint8_t *)ALIGN(((uintptr_t)k_buf_src),
+ CACHE_LINE_SIZE);
+ memcpy(k_align_src, &handle->sha_ctxt.trailing_buf[0], total);
+ }
+ qcedev_areq->sha_req.sreq.src = (struct scatterlist *) &sg_src;
+ sg_set_buf(qcedev_areq->sha_req.sreq.src, k_align_src, total);
+ sg_mark_end(qcedev_areq->sha_req.sreq.src);
+
+ qcedev_areq->sha_req.sreq.nbytes = total;
+
+ err = submit_req(qcedev_areq, handle);
+
+ handle->sha_ctxt.first_blk = 0;
+ handle->sha_ctxt.last_blk = 0;
+ handle->sha_ctxt.auth_data[0] = 0;
+ handle->sha_ctxt.auth_data[1] = 0;
+ handle->sha_ctxt.trailing_buf_len = 0;
+ handle->sha_ctxt.init_done = false;
+ memset(&handle->sha_ctxt.trailing_buf[0], 0, 64);
+
+ kzfree(k_buf_src);
+ return err;
+}
+
+static int qcedev_hash_cmac(struct qcedev_async_req *qcedev_areq,
+ struct qcedev_handle *handle,
+ struct scatterlist *sg_src)
+{
+ int err = 0;
+ int i = 0;
+ uint32_t total;
+
+ uint8_t *user_src = NULL;
+ uint8_t *k_src = NULL;
+ uint8_t *k_buf_src = NULL;
+
+ total = qcedev_areq->sha_op_req.data_len;
+
+ if (copy_from_user(&handle->sha_ctxt.authkey[0],
+ (void __user *)qcedev_areq->sha_op_req.authkey,
+ qcedev_areq->sha_op_req.authklen))
+ return -EFAULT;
+
+
+ k_buf_src = kmalloc(total, GFP_KERNEL);
+ if (k_buf_src == NULL) {
+ pr_err("%s: Can't Allocate memory: k_buf_src 0x%lx\n",
+ __func__, (uintptr_t)k_buf_src);
+ return -ENOMEM;
+ }
+
+ k_src = k_buf_src;
+
+ /* Copy data from user src(s) */
+ user_src = (void __user *)qcedev_areq->sha_op_req.data[0].vaddr;
+ for (i = 0; i < qcedev_areq->sha_op_req.entries; i++) {
+ user_src =
+ (void __user *)qcedev_areq->sha_op_req.data[i].vaddr;
+ if (user_src && copy_from_user(k_src, (void __user *)user_src,
+ qcedev_areq->sha_op_req.data[i].len)) {
+ kzfree(k_buf_src);
+ return -EFAULT;
+ }
+ k_src += qcedev_areq->sha_op_req.data[i].len;
+ }
+
+ qcedev_areq->sha_req.sreq.src = sg_src;
+ sg_set_buf(qcedev_areq->sha_req.sreq.src, k_buf_src, total);
+ sg_mark_end(qcedev_areq->sha_req.sreq.src);
+
+ qcedev_areq->sha_req.sreq.nbytes = total;
+ handle->sha_ctxt.diglen = qcedev_areq->sha_op_req.diglen;
+ err = submit_req(qcedev_areq, handle);
+
+ kzfree(k_buf_src);
+ return err;
+}
+
+static int qcedev_set_hmac_auth_key(struct qcedev_async_req *areq,
+ struct qcedev_handle *handle,
+ struct scatterlist *sg_src)
+{
+ int err = 0;
+
+ if (areq->sha_op_req.authklen <= QCEDEV_MAX_KEY_SIZE) {
+ qcedev_sha_init(areq, handle);
+ if (copy_from_user(&handle->sha_ctxt.authkey[0],
+ (void __user *)areq->sha_op_req.authkey,
+ areq->sha_op_req.authklen))
+ return -EFAULT;
+ } else {
+ struct qcedev_async_req authkey_areq;
+ uint8_t authkey[QCEDEV_MAX_SHA_BLOCK_SIZE];
+
+ init_completion(&authkey_areq.complete);
+
+ authkey_areq.sha_op_req.entries = 1;
+ authkey_areq.sha_op_req.data[0].vaddr =
+ areq->sha_op_req.authkey;
+ authkey_areq.sha_op_req.data[0].len = areq->sha_op_req.authklen;
+ authkey_areq.sha_op_req.data_len = areq->sha_op_req.authklen;
+ authkey_areq.sha_op_req.diglen = 0;
+ authkey_areq.handle = handle;
+
+ memset(&authkey_areq.sha_op_req.digest[0], 0,
+ QCEDEV_MAX_SHA_DIGEST);
+ if (areq->sha_op_req.alg == QCEDEV_ALG_SHA1_HMAC)
+ authkey_areq.sha_op_req.alg = QCEDEV_ALG_SHA1;
+ if (areq->sha_op_req.alg == QCEDEV_ALG_SHA256_HMAC)
+ authkey_areq.sha_op_req.alg = QCEDEV_ALG_SHA256;
+
+ authkey_areq.op_type = QCEDEV_CRYPTO_OPER_SHA;
+
+ qcedev_sha_init(&authkey_areq, handle);
+ err = qcedev_sha_update(&authkey_areq, handle, sg_src);
+ if (!err)
+ err = qcedev_sha_final(&authkey_areq, handle);
+ else
+ return err;
+ memcpy(&authkey[0], &handle->sha_ctxt.digest[0],
+ handle->sha_ctxt.diglen);
+ qcedev_sha_init(areq, handle);
+
+ memcpy(&handle->sha_ctxt.authkey[0], &authkey[0],
+ handle->sha_ctxt.diglen);
+ }
+ return err;
+}
+
+static int qcedev_hmac_get_ohash(struct qcedev_async_req *qcedev_areq,
+ struct qcedev_handle *handle)
+{
+ int err = 0;
+ struct scatterlist sg_src;
+ uint8_t *k_src = NULL;
+ uint32_t sha_block_size = 0;
+ uint32_t sha_digest_size = 0;
+
+ if (qcedev_areq->sha_op_req.alg == QCEDEV_ALG_SHA1_HMAC) {
+ sha_digest_size = SHA1_DIGEST_SIZE;
+ sha_block_size = SHA1_BLOCK_SIZE;
+ } else {
+ if (qcedev_areq->sha_op_req.alg == QCEDEV_ALG_SHA256_HMAC) {
+ sha_digest_size = SHA256_DIGEST_SIZE;
+ sha_block_size = SHA256_BLOCK_SIZE;
+ }
+ }
+ k_src = kmalloc(sha_block_size, GFP_KERNEL);
+ if (k_src == NULL) {
+ pr_err("%s: Can't Allocate memory: k_src 0x%lx\n",
+ __func__, (uintptr_t)k_src);
+ return -ENOMEM;
+ }
+
+ /* check for trailing buffer from previous updates and append it */
+ memcpy(k_src, &handle->sha_ctxt.trailing_buf[0],
+ handle->sha_ctxt.trailing_buf_len);
+
+ qcedev_areq->sha_req.sreq.src = (struct scatterlist *) &sg_src;
+ sg_set_buf(qcedev_areq->sha_req.sreq.src, k_src, sha_block_size);
+ sg_mark_end(qcedev_areq->sha_req.sreq.src);
+
+ qcedev_areq->sha_req.sreq.nbytes = sha_block_size;
+ memset(&handle->sha_ctxt.trailing_buf[0], 0, sha_block_size);
+ memcpy(&handle->sha_ctxt.trailing_buf[0], &handle->sha_ctxt.digest[0],
+ sha_digest_size);
+ handle->sha_ctxt.trailing_buf_len = sha_digest_size;
+
+ handle->sha_ctxt.first_blk = 1;
+ handle->sha_ctxt.last_blk = 0;
+ handle->sha_ctxt.auth_data[0] = 0;
+ handle->sha_ctxt.auth_data[1] = 0;
+
+ if (qcedev_areq->sha_op_req.alg == QCEDEV_ALG_SHA1_HMAC) {
+ memcpy(&handle->sha_ctxt.digest[0],
+ &_std_init_vector_sha1_uint8[0], SHA1_DIGEST_SIZE);
+ handle->sha_ctxt.diglen = SHA1_DIGEST_SIZE;
+ }
+
+ if (qcedev_areq->sha_op_req.alg == QCEDEV_ALG_SHA256_HMAC) {
+ memcpy(&handle->sha_ctxt.digest[0],
+ &_std_init_vector_sha256_uint8[0], SHA256_DIGEST_SIZE);
+ handle->sha_ctxt.diglen = SHA256_DIGEST_SIZE;
+ }
+ err = submit_req(qcedev_areq, handle);
+
+ handle->sha_ctxt.last_blk = 0;
+ handle->sha_ctxt.first_blk = 0;
+
+ kzfree(k_src);
+ return err;
+}
+
+static int qcedev_hmac_update_iokey(struct qcedev_async_req *areq,
+ struct qcedev_handle *handle, bool ikey)
+{
+ int i;
+ uint32_t constant;
+ uint32_t sha_block_size;
+
+ if (ikey)
+ constant = 0x36;
+ else
+ constant = 0x5c;
+
+ if (areq->sha_op_req.alg == QCEDEV_ALG_SHA1_HMAC)
+ sha_block_size = SHA1_BLOCK_SIZE;
+ else
+ sha_block_size = SHA256_BLOCK_SIZE;
+
+ memset(&handle->sha_ctxt.trailing_buf[0], 0, sha_block_size);
+ for (i = 0; i < sha_block_size; i++)
+ handle->sha_ctxt.trailing_buf[i] =
+ (handle->sha_ctxt.authkey[i] ^ constant);
+
+ handle->sha_ctxt.trailing_buf_len = sha_block_size;
+ return 0;
+}
+
+static int qcedev_hmac_init(struct qcedev_async_req *areq,
+ struct qcedev_handle *handle,
+ struct scatterlist *sg_src)
+{
+ int err;
+ struct qcedev_control *podev = handle->cntl;
+
+ err = qcedev_set_hmac_auth_key(areq, handle, sg_src);
+ if (err)
+ return err;
+ if (!podev->ce_support.sha_hmac)
+ qcedev_hmac_update_iokey(areq, handle, true);
+ return 0;
+}
+
+static int qcedev_hmac_final(struct qcedev_async_req *areq,
+ struct qcedev_handle *handle)
+{
+ int err;
+ struct qcedev_control *podev = handle->cntl;
+
+ err = qcedev_sha_final(areq, handle);
+ if (podev->ce_support.sha_hmac)
+ return err;
+
+ qcedev_hmac_update_iokey(areq, handle, false);
+ err = qcedev_hmac_get_ohash(areq, handle);
+ if (err)
+ return err;
+ err = qcedev_sha_final(areq, handle);
+
+ return err;
+}
+
+static int qcedev_hash_init(struct qcedev_async_req *areq,
+ struct qcedev_handle *handle,
+ struct scatterlist *sg_src)
+{
+ if ((areq->sha_op_req.alg == QCEDEV_ALG_SHA1) ||
+ (areq->sha_op_req.alg == QCEDEV_ALG_SHA256))
+ return qcedev_sha_init(areq, handle);
+ else
+ return qcedev_hmac_init(areq, handle, sg_src);
+}
+
+static int qcedev_hash_update(struct qcedev_async_req *qcedev_areq,
+ struct qcedev_handle *handle,
+ struct scatterlist *sg_src)
+{
+ return qcedev_sha_update(qcedev_areq, handle, sg_src);
+}
+
+static int qcedev_hash_final(struct qcedev_async_req *areq,
+ struct qcedev_handle *handle)
+{
+ if ((areq->sha_op_req.alg == QCEDEV_ALG_SHA1) ||
+ (areq->sha_op_req.alg == QCEDEV_ALG_SHA256))
+ return qcedev_sha_final(areq, handle);
+ else
+ return qcedev_hmac_final(areq, handle);
+}
+
+static int qcedev_vbuf_ablk_cipher_max_xfer(struct qcedev_async_req *areq,
+ int *di, struct qcedev_handle *handle,
+ uint8_t *k_align_src)
+{
+ int err = 0;
+ int i = 0;
+ int dst_i = *di;
+ struct scatterlist sg_src;
+ uint32_t byteoffset = 0;
+ uint8_t *user_src = NULL;
+ uint8_t *k_align_dst = k_align_src;
+ struct qcedev_cipher_op_req *creq = &areq->cipher_op_req;
+
+
+ if (areq->cipher_op_req.mode == QCEDEV_AES_MODE_CTR)
+ byteoffset = areq->cipher_op_req.byteoffset;
+
+ user_src = (void __user *)areq->cipher_op_req.vbuf.src[0].vaddr;
+ if (user_src && copy_from_user((k_align_src + byteoffset),
+ (void __user *)user_src,
+ areq->cipher_op_req.vbuf.src[0].len))
+ return -EFAULT;
+
+ k_align_src += byteoffset + areq->cipher_op_req.vbuf.src[0].len;
+
+ for (i = 1; i < areq->cipher_op_req.entries; i++) {
+ user_src =
+ (void __user *)areq->cipher_op_req.vbuf.src[i].vaddr;
+ if (user_src && copy_from_user(k_align_src,
+ (void __user *)user_src,
+ areq->cipher_op_req.vbuf.src[i].len)) {
+ return -EFAULT;
+ }
+ k_align_src += areq->cipher_op_req.vbuf.src[i].len;
+ }
+
+ /* restore src beginning */
+ k_align_src = k_align_dst;
+ areq->cipher_op_req.data_len += byteoffset;
+
+ areq->cipher_req.creq.src = (struct scatterlist *) &sg_src;
+ areq->cipher_req.creq.dst = (struct scatterlist *) &sg_src;
+
+ /* In place encryption/decryption */
+ sg_set_buf(areq->cipher_req.creq.src,
+ k_align_dst,
+ areq->cipher_op_req.data_len);
+ sg_mark_end(areq->cipher_req.creq.src);
+
+ areq->cipher_req.creq.nbytes = areq->cipher_op_req.data_len;
+ areq->cipher_req.creq.info = areq->cipher_op_req.iv;
+ areq->cipher_op_req.entries = 1;
+
+ err = submit_req(areq, handle);
+
+ /* copy data to destination buffer*/
+ creq->data_len -= byteoffset;
+
+ while (creq->data_len > 0) {
+ if (creq->vbuf.dst[dst_i].len <= creq->data_len) {
+ if (err == 0 && copy_to_user(
+ (void __user *)creq->vbuf.dst[dst_i].vaddr,
+ (k_align_dst + byteoffset),
+ creq->vbuf.dst[dst_i].len))
+ return -EFAULT;
+
+ k_align_dst += creq->vbuf.dst[dst_i].len +
+ byteoffset;
+ creq->data_len -= creq->vbuf.dst[dst_i].len;
+ dst_i++;
+ } else {
+ if (err == 0 && copy_to_user(
+ (void __user *)creq->vbuf.dst[dst_i].vaddr,
+ (k_align_dst + byteoffset),
+ creq->data_len))
+ return -EFAULT;
+
+ k_align_dst += creq->data_len;
+ creq->vbuf.dst[dst_i].len -= creq->data_len;
+ creq->vbuf.dst[dst_i].vaddr += creq->data_len;
+ creq->data_len = 0;
+ }
+ }
+ *di = dst_i;
+
+ return err;
+};
+
+static int qcedev_vbuf_ablk_cipher(struct qcedev_async_req *areq,
+ struct qcedev_handle *handle)
+{
+ int err = 0;
+ int di = 0;
+ int i = 0;
+ int j = 0;
+ int k = 0;
+ uint32_t byteoffset = 0;
+ int num_entries = 0;
+ uint32_t total = 0;
+ uint32_t len;
+ uint8_t *k_buf_src = NULL;
+ uint8_t *k_align_src = NULL;
+ uint32_t max_data_xfer;
+ struct qcedev_cipher_op_req *saved_req;
+ struct qcedev_cipher_op_req *creq = &areq->cipher_op_req;
+
+ total = 0;
+
+ if (areq->cipher_op_req.mode == QCEDEV_AES_MODE_CTR)
+ byteoffset = areq->cipher_op_req.byteoffset;
+ k_buf_src = kmalloc(QCE_MAX_OPER_DATA + CACHE_LINE_SIZE * 2,
+ GFP_KERNEL);
+ if (k_buf_src == NULL) {
+ pr_err("%s: Can't Allocate memory: k_buf_src 0x%lx\n",
+ __func__, (uintptr_t)k_buf_src);
+ return -ENOMEM;
+ }
+ k_align_src = (uint8_t *)ALIGN(((uintptr_t)k_buf_src),
+ CACHE_LINE_SIZE);
+ max_data_xfer = QCE_MAX_OPER_DATA - byteoffset;
+
+ saved_req = kmalloc(sizeof(struct qcedev_cipher_op_req), GFP_KERNEL);
+ if (saved_req == NULL) {
+ pr_err("%s: Can't Allocate memory:saved_req 0x%lx\n",
+ __func__, (uintptr_t)saved_req);
+ kzfree(k_buf_src);
+ return -ENOMEM;
+
+ }
+ memcpy(saved_req, creq, sizeof(struct qcedev_cipher_op_req));
+
+ if (areq->cipher_op_req.data_len > max_data_xfer) {
+ struct qcedev_cipher_op_req req;
+
+ /* save the original req structure */
+ memcpy(&req, creq, sizeof(struct qcedev_cipher_op_req));
+
+ i = 0;
+ /* Address 32 KB at a time */
+ while ((i < req.entries) && (err == 0)) {
+ if (creq->vbuf.src[i].len > max_data_xfer) {
+ creq->vbuf.src[0].len = max_data_xfer;
+ if (i > 0) {
+ creq->vbuf.src[0].vaddr =
+ creq->vbuf.src[i].vaddr;
+ }
+
+ creq->data_len = max_data_xfer;
+ creq->entries = 1;
+
+ err = qcedev_vbuf_ablk_cipher_max_xfer(areq,
+ &di, handle, k_align_src);
+ if (err < 0) {
+ kzfree(k_buf_src);
+ kzfree(saved_req);
+ return err;
+ }
+
+ creq->vbuf.src[i].len = req.vbuf.src[i].len -
+ max_data_xfer;
+ creq->vbuf.src[i].vaddr =
+ req.vbuf.src[i].vaddr +
+ max_data_xfer;
+ req.vbuf.src[i].vaddr =
+ creq->vbuf.src[i].vaddr;
+ req.vbuf.src[i].len = creq->vbuf.src[i].len;
+
+ } else {
+ total = areq->cipher_op_req.byteoffset;
+ for (j = i; j < req.entries; j++) {
+ num_entries++;
+ if ((total + creq->vbuf.src[j].len)
+ >= max_data_xfer) {
+ creq->vbuf.src[j].len =
+ max_data_xfer - total;
+ total = max_data_xfer;
+ break;
+ }
+ total += creq->vbuf.src[j].len;
+ }
+
+ creq->data_len = total;
+ if (i > 0)
+ for (k = 0; k < num_entries; k++) {
+ creq->vbuf.src[k].len =
+ creq->vbuf.src[i+k].len;
+ creq->vbuf.src[k].vaddr =
+ creq->vbuf.src[i+k].vaddr;
+ }
+ creq->entries = num_entries;
+
+ i = j;
+ err = qcedev_vbuf_ablk_cipher_max_xfer(areq,
+ &di, handle, k_align_src);
+ if (err < 0) {
+ kzfree(k_buf_src);
+ kzfree(saved_req);
+ return err;
+ }
+
+ num_entries = 0;
+ areq->cipher_op_req.byteoffset = 0;
+
+ creq->vbuf.src[i].vaddr = req.vbuf.src[i].vaddr
+ + creq->vbuf.src[i].len;
+ creq->vbuf.src[i].len = req.vbuf.src[i].len -
+ creq->vbuf.src[i].len;
+
+ req.vbuf.src[i].vaddr =
+ creq->vbuf.src[i].vaddr;
+ req.vbuf.src[i].len = creq->vbuf.src[i].len;
+
+ if (creq->vbuf.src[i].len == 0)
+ i++;
+ }
+
+ areq->cipher_op_req.byteoffset = 0;
+ max_data_xfer = QCE_MAX_OPER_DATA;
+ byteoffset = 0;
+
+ } /* end of while ((i < req.entries) && (err == 0)) */
+ } else
+ err = qcedev_vbuf_ablk_cipher_max_xfer(areq, &di, handle,
+ k_align_src);
+
+ /* Restore the original req structure */
+ for (i = 0; i < saved_req->entries; i++) {
+ creq->vbuf.src[i].len = saved_req->vbuf.src[i].len;
+ creq->vbuf.src[i].vaddr = saved_req->vbuf.src[i].vaddr;
+ }
+ for (len = 0, i = 0; len < saved_req->data_len; i++) {
+ creq->vbuf.dst[i].len = saved_req->vbuf.dst[i].len;
+ creq->vbuf.dst[i].vaddr = saved_req->vbuf.dst[i].vaddr;
+ len += saved_req->vbuf.dst[i].len;
+ }
+ creq->entries = saved_req->entries;
+ creq->data_len = saved_req->data_len;
+ creq->byteoffset = saved_req->byteoffset;
+
+ kzfree(saved_req);
+ kzfree(k_buf_src);
+ return err;
+
+}
+
+static int qcedev_check_cipher_key(struct qcedev_cipher_op_req *req,
+ struct qcedev_control *podev)
+{
+ /* if intending to use HW key make sure key fields are set
+ * correctly and HW key is indeed supported in target
+ */
+ if (req->encklen == 0) {
+ int i;
+ for (i = 0; i < QCEDEV_MAX_KEY_SIZE; i++) {
+ if (req->enckey[i]) {
+ pr_err("%s: Invalid key: non-zero key input\n",
+ __func__);
+ goto error;
+ }
+ }
+ if ((req->op != QCEDEV_OPER_ENC_NO_KEY) &&
+ (req->op != QCEDEV_OPER_DEC_NO_KEY))
+ if (!podev->platform_support.hw_key_support) {
+ pr_err("%s: Invalid op %d\n", __func__,
+ (uint32_t)req->op);
+ goto error;
+ }
+ } else {
+ if (req->encklen == QCEDEV_AES_KEY_192) {
+ if (!podev->ce_support.aes_key_192) {
+ pr_err("%s: AES-192 not supported\n", __func__);
+ goto error;
+ }
+ } else {
+ /* if not using HW key make sure key
+ * length is valid
+ */
+ if (req->mode == QCEDEV_AES_MODE_XTS) {
+ if ((req->encklen != QCEDEV_AES_KEY_128*2) &&
+ (req->encklen != QCEDEV_AES_KEY_256*2)) {
+ pr_err("%s: unsupported key size: %d\n",
+ __func__, req->encklen);
+ goto error;
+ }
+ } else {
+ if ((req->encklen != QCEDEV_AES_KEY_128) &&
+ (req->encklen != QCEDEV_AES_KEY_256)) {
+ pr_err("%s: unsupported key size %d\n",
+ __func__, req->encklen);
+ goto error;
+ }
+ }
+ }
+ }
+ return 0;
+error:
+ return -EINVAL;
+}
+
+static int qcedev_check_cipher_params(struct qcedev_cipher_op_req *req,
+ struct qcedev_control *podev)
+{
+ uint32_t total = 0;
+ uint32_t i;
+
+ if (req->use_pmem) {
+ pr_err("%s: Use of PMEM is not supported\n", __func__);
+ goto error;
+ }
+ if ((req->entries == 0) || (req->data_len == 0) ||
+ (req->entries > QCEDEV_MAX_BUFFERS)) {
+ pr_err("%s: Invalid cipher length/entries\n", __func__);
+ goto error;
+ }
+ if ((req->alg >= QCEDEV_ALG_LAST) ||
+ (req->mode >= QCEDEV_AES_DES_MODE_LAST)) {
+ pr_err("%s: Invalid algorithm %d\n", __func__,
+ (uint32_t)req->alg);
+ goto error;
+ }
+ if ((req->mode == QCEDEV_AES_MODE_XTS) &&
+ (!podev->ce_support.aes_xts)) {
+ pr_err("%s: XTS algorithm is not supported\n", __func__);
+ goto error;
+ }
+ if (req->alg == QCEDEV_ALG_AES) {
+ if (qcedev_check_cipher_key(req, podev))
+ goto error;
+
+ }
+ /* if using a byteoffset, make sure it is CTR mode using vbuf */
+ if (req->byteoffset) {
+ if (req->mode != QCEDEV_AES_MODE_CTR) {
+ pr_err("%s: Operation on byte offset not supported\n",
+ __func__);
+ goto error;
+ }
+ if (req->byteoffset >= AES_CE_BLOCK_SIZE) {
+ pr_err("%s: Invalid byte offset\n", __func__);
+ goto error;
+ }
+ total = req->byteoffset;
+ for (i = 0; i < req->entries; i++) {
+ if (total > U32_MAX - req->vbuf.src[i].len) {
+ pr_err("%s:Integer overflow on total src len\n",
+ __func__);
+ goto error;
+ }
+ total += req->vbuf.src[i].len;
+ }
+ }
+
+ if (req->data_len < req->byteoffset) {
+ pr_err("%s: req data length %u is less than byteoffset %u\n",
+ __func__, req->data_len, req->byteoffset);
+ goto error;
+ }
+
+ /* Ensure IV size */
+ if (req->ivlen > QCEDEV_MAX_IV_SIZE) {
+ pr_err("%s: ivlen is not correct: %u\n", __func__, req->ivlen);
+ goto error;
+ }
+
+ /* Ensure Key size */
+ if (req->encklen > QCEDEV_MAX_KEY_SIZE) {
+ pr_err("%s: Klen is not correct: %u\n", __func__, req->encklen);
+ goto error;
+ }
+
+ /* Ensure zer ivlen for ECB mode */
+ if (req->ivlen > 0) {
+ if ((req->mode == QCEDEV_AES_MODE_ECB) ||
+ (req->mode == QCEDEV_DES_MODE_ECB)) {
+ pr_err("%s: Expecting a zero length IV\n", __func__);
+ goto error;
+ }
+ } else {
+ if ((req->mode != QCEDEV_AES_MODE_ECB) &&
+ (req->mode != QCEDEV_DES_MODE_ECB)) {
+ pr_err("%s: Expecting a non-zero ength IV\n", __func__);
+ goto error;
+ }
+ }
+ /* Check for sum of all dst length is equal to data_len */
+ for (i = 0, total = 0; i < req->entries; i++) {
+ if (!req->vbuf.dst[i].vaddr && req->vbuf.dst[i].len) {
+ pr_err("%s: NULL req dst vbuf[%d] with length %d\n",
+ __func__, i, req->vbuf.dst[i].len);
+ goto error;
+ }
+ if (req->vbuf.dst[i].len >= U32_MAX - total) {
+ pr_err("%s: Integer overflow on total req dst vbuf length\n",
+ __func__);
+ goto error;
+ }
+ total += req->vbuf.dst[i].len;
+ }
+ if (total != req->data_len) {
+ pr_err("%s: Total (i=%d) dst(%d) buf size != data_len (%d)\n",
+ __func__, i, total, req->data_len);
+ goto error;
+ }
+ /* Check for sum of all src length is equal to data_len */
+ for (i = 0, total = 0; i < req->entries; i++) {
+ if (!req->vbuf.src[i].vaddr && req->vbuf.src[i].len) {
+ pr_err("%s: NULL req src vbuf[%d] with length %d\n",
+ __func__, i, req->vbuf.src[i].len);
+ goto error;
+ }
+ if (req->vbuf.src[i].len > U32_MAX - total) {
+ pr_err("%s: Integer overflow on total req src vbuf length\n",
+ __func__);
+ goto error;
+ }
+ total += req->vbuf.src[i].len;
+ }
+ if (total != req->data_len) {
+ pr_err("%s: Total src(%d) buf size != data_len (%d)\n",
+ __func__, total, req->data_len);
+ goto error;
+ }
+ return 0;
+error:
+ return -EINVAL;
+
+}
+
+static int qcedev_check_sha_params(struct qcedev_sha_op_req *req,
+ struct qcedev_control *podev)
+{
+ uint32_t total = 0;
+ uint32_t i;
+
+ if ((req->alg == QCEDEV_ALG_AES_CMAC) &&
+ (!podev->ce_support.cmac)) {
+ pr_err("%s: CMAC not supported\n", __func__);
+ goto sha_error;
+ }
+ if ((!req->entries) || (req->entries > QCEDEV_MAX_BUFFERS)) {
+ pr_err("%s: Invalid num entries (%d)\n",
+ __func__, req->entries);
+ goto sha_error;
+ }
+
+ if (req->alg >= QCEDEV_ALG_SHA_ALG_LAST) {
+ pr_err("%s: Invalid algorithm (%d)\n", __func__, req->alg);
+ goto sha_error;
+ }
+ if ((req->alg == QCEDEV_ALG_SHA1_HMAC) ||
+ (req->alg == QCEDEV_ALG_SHA1_HMAC)) {
+ if (req->authkey == NULL) {
+ pr_err("%s: Invalid authkey pointer\n", __func__);
+ goto sha_error;
+ }
+ if (req->authklen <= 0) {
+ pr_err("%s: Invalid authkey length (%d)\n",
+ __func__, req->authklen);
+ goto sha_error;
+ }
+ }
+
+ if (req->alg == QCEDEV_ALG_AES_CMAC) {
+ if ((req->authklen != QCEDEV_AES_KEY_128) &&
+ (req->authklen != QCEDEV_AES_KEY_256)) {
+ pr_err("%s: unsupported key length\n", __func__);
+ goto sha_error;
+ }
+ }
+
+ /* Check for sum of all src length is equal to data_len */
+ for (i = 0, total = 0; i < req->entries; i++) {
+ if (req->data[i].len > U32_MAX - total) {
+ pr_err("%s: Integer overflow on total req buf length\n",
+ __func__);
+ goto sha_error;
+ }
+ total += req->data[i].len;
+ }
+
+ if (total != req->data_len) {
+ pr_err("%s: Total src(%d) buf size != data_len (%d)\n",
+ __func__, total, req->data_len);
+ goto sha_error;
+ }
+ return 0;
+sha_error:
+ return -EINVAL;
+}
+
+long qcedev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
+{
+ int err = 0;
+ struct qcedev_handle *handle;
+ struct qcedev_control *podev;
+ struct qcedev_async_req qcedev_areq;
+ struct qcedev_stat *pstat;
+
+ handle = file->private_data;
+ podev = handle->cntl;
+ qcedev_areq.handle = handle;
+ if (podev == NULL || podev->magic != QCEDEV_MAGIC) {
+ pr_err("%s: invalid handle %pK\n",
+ __func__, podev);
+ return -ENOENT;
+ }
+
+ /* Verify user arguments. */
+ if (_IOC_TYPE(cmd) != QCEDEV_IOC_MAGIC)
+ return -ENOTTY;
+
+ init_completion(&qcedev_areq.complete);
+ pstat = &_qcedev_stat;
+
+ switch (cmd) {
+ case QCEDEV_IOCTL_ENC_REQ:
+ case QCEDEV_IOCTL_DEC_REQ:
+ if (copy_from_user(&qcedev_areq.cipher_op_req,
+ (void __user *)arg,
+ sizeof(struct qcedev_cipher_op_req)))
+ return -EFAULT;
+ qcedev_areq.op_type = QCEDEV_CRYPTO_OPER_CIPHER;
+
+ if (qcedev_check_cipher_params(&qcedev_areq.cipher_op_req,
+ podev))
+ return -EINVAL;
+
+ err = qcedev_vbuf_ablk_cipher(&qcedev_areq, handle);
+ if (err)
+ return err;
+ if (copy_to_user((void __user *)arg,
+ &qcedev_areq.cipher_op_req,
+ sizeof(struct qcedev_cipher_op_req)))
+ return -EFAULT;
+ break;
+
+ case QCEDEV_IOCTL_SHA_INIT_REQ:
+ {
+ struct scatterlist sg_src;
+
+ if (copy_from_user(&qcedev_areq.sha_op_req,
+ (void __user *)arg,
+ sizeof(struct qcedev_sha_op_req)))
+ return -EFAULT;
+ mutex_lock(&hash_access_lock);
+ if (qcedev_check_sha_params(&qcedev_areq.sha_op_req, podev)) {
+ mutex_unlock(&hash_access_lock);
+ return -EINVAL;
+ }
+ qcedev_areq.op_type = QCEDEV_CRYPTO_OPER_SHA;
+ err = qcedev_hash_init(&qcedev_areq, handle, &sg_src);
+ if (err) {
+ mutex_unlock(&hash_access_lock);
+ return err;
+ }
+ mutex_unlock(&hash_access_lock);
+ if (copy_to_user((void __user *)arg, &qcedev_areq.sha_op_req,
+ sizeof(struct qcedev_sha_op_req)))
+ return -EFAULT;
+ }
+ handle->sha_ctxt.init_done = true;
+ break;
+ case QCEDEV_IOCTL_GET_CMAC_REQ:
+ if (!podev->ce_support.cmac)
+ return -ENOTTY;
+ case QCEDEV_IOCTL_SHA_UPDATE_REQ:
+ {
+ struct scatterlist sg_src;
+
+ if (copy_from_user(&qcedev_areq.sha_op_req,
+ (void __user *)arg,
+ sizeof(struct qcedev_sha_op_req)))
+ return -EFAULT;
+ mutex_lock(&hash_access_lock);
+ if (qcedev_check_sha_params(&qcedev_areq.sha_op_req, podev)) {
+ mutex_unlock(&hash_access_lock);
+ return -EINVAL;
+ }
+ qcedev_areq.op_type = QCEDEV_CRYPTO_OPER_SHA;
+
+ if (qcedev_areq.sha_op_req.alg == QCEDEV_ALG_AES_CMAC) {
+ err = qcedev_hash_cmac(&qcedev_areq, handle, &sg_src);
+ if (err) {
+ mutex_unlock(&hash_access_lock);
+ return err;
+ }
+ } else {
+ if (handle->sha_ctxt.init_done == false) {
+ pr_err("%s Init was not called\n", __func__);
+ mutex_unlock(&hash_access_lock);
+ return -EINVAL;
+ }
+ err = qcedev_hash_update(&qcedev_areq, handle, &sg_src);
+ if (err) {
+ mutex_unlock(&hash_access_lock);
+ return err;
+ }
+ }
+
+ if (handle->sha_ctxt.diglen > QCEDEV_MAX_SHA_DIGEST) {
+ pr_err("Invalid sha_ctxt.diglen %d\n",
+ handle->sha_ctxt.diglen);
+ mutex_unlock(&hash_access_lock);
+ return -EINVAL;
+ }
+ memcpy(&qcedev_areq.sha_op_req.digest[0],
+ &handle->sha_ctxt.digest[0],
+ handle->sha_ctxt.diglen);
+ mutex_unlock(&hash_access_lock);
+ if (copy_to_user((void __user *)arg, &qcedev_areq.sha_op_req,
+ sizeof(struct qcedev_sha_op_req)))
+ return -EFAULT;
+ }
+ break;
+
+ case QCEDEV_IOCTL_SHA_FINAL_REQ:
+
+ if (handle->sha_ctxt.init_done == false) {
+ pr_err("%s Init was not called\n", __func__);
+ return -EINVAL;
+ }
+ if (copy_from_user(&qcedev_areq.sha_op_req,
+ (void __user *)arg,
+ sizeof(struct qcedev_sha_op_req)))
+ return -EFAULT;
+ mutex_lock(&hash_access_lock);
+ if (qcedev_check_sha_params(&qcedev_areq.sha_op_req, podev)) {
+ mutex_unlock(&hash_access_lock);
+ return -EINVAL;
+ }
+ qcedev_areq.op_type = QCEDEV_CRYPTO_OPER_SHA;
+ err = qcedev_hash_final(&qcedev_areq, handle);
+ if (err) {
+ mutex_unlock(&hash_access_lock);
+ return err;
+ }
+ if (handle->sha_ctxt.diglen > QCEDEV_MAX_SHA_DIGEST) {
+ pr_err("Invalid sha_ctxt.diglen %d\n",
+ handle->sha_ctxt.diglen);
+ mutex_unlock(&hash_access_lock);
+ return -EINVAL;
+ }
+ qcedev_areq.sha_op_req.diglen = handle->sha_ctxt.diglen;
+ memcpy(&qcedev_areq.sha_op_req.digest[0],
+ &handle->sha_ctxt.digest[0],
+ handle->sha_ctxt.diglen);
+ mutex_unlock(&hash_access_lock);
+ if (copy_to_user((void __user *)arg, &qcedev_areq.sha_op_req,
+ sizeof(struct qcedev_sha_op_req)))
+ return -EFAULT;
+ handle->sha_ctxt.init_done = false;
+ break;
+
+ case QCEDEV_IOCTL_GET_SHA_REQ:
+ {
+ struct scatterlist sg_src;
+
+ if (copy_from_user(&qcedev_areq.sha_op_req,
+ (void __user *)arg,
+ sizeof(struct qcedev_sha_op_req)))
+ return -EFAULT;
+ mutex_lock(&hash_access_lock);
+ if (qcedev_check_sha_params(&qcedev_areq.sha_op_req, podev)) {
+ mutex_unlock(&hash_access_lock);
+ return -EINVAL;
+ }
+ qcedev_areq.op_type = QCEDEV_CRYPTO_OPER_SHA;
+ qcedev_hash_init(&qcedev_areq, handle, &sg_src);
+ err = qcedev_hash_update(&qcedev_areq, handle, &sg_src);
+ if (err) {
+ mutex_unlock(&hash_access_lock);
+ return err;
+ }
+ err = qcedev_hash_final(&qcedev_areq, handle);
+ if (err) {
+ mutex_unlock(&hash_access_lock);
+ return err;
+ }
+ if (handle->sha_ctxt.diglen > QCEDEV_MAX_SHA_DIGEST) {
+ pr_err("Invalid sha_ctxt.diglen %d\n",
+ handle->sha_ctxt.diglen);
+ mutex_unlock(&hash_access_lock);
+ return -EINVAL;
+ }
+ qcedev_areq.sha_op_req.diglen = handle->sha_ctxt.diglen;
+ memcpy(&qcedev_areq.sha_op_req.digest[0],
+ &handle->sha_ctxt.digest[0],
+ handle->sha_ctxt.diglen);
+ mutex_unlock(&hash_access_lock);
+ if (copy_to_user((void __user *)arg, &qcedev_areq.sha_op_req,
+ sizeof(struct qcedev_sha_op_req)))
+ return -EFAULT;
+ }
+ break;
+
+ default:
+ return -ENOTTY;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(qcedev_ioctl);
+
+static int qcedev_probe(struct platform_device *pdev)
+{
+ void *handle = NULL;
+ int rc = 0;
+ struct qcedev_control *podev;
+ struct msm_ce_hw_support *platform_support;
+
+ podev = &qce_dev[0];
+
+ podev->high_bw_req_count = 0;
+ INIT_LIST_HEAD(&podev->ready_commands);
+ podev->active_command = NULL;
+
+ spin_lock_init(&podev->lock);
+
+ tasklet_init(&podev->done_tasklet, req_done, (unsigned long)podev);
+
+ /* open qce */
+ handle = qce_open(pdev, &rc);
+ if (handle == NULL) {
+ platform_set_drvdata(pdev, NULL);
+ return rc;
+ }
+
+ podev->qce = handle;
+ podev->pdev = pdev;
+ platform_set_drvdata(pdev, podev);
+
+ rc = misc_register(&podev->miscdevice);
+ qce_hw_support(podev->qce, &podev->ce_support);
+ if (podev->ce_support.bam) {
+ podev->platform_support.ce_shared = 0;
+ podev->platform_support.shared_ce_resource = 0;
+ podev->platform_support.hw_key_support =
+ podev->ce_support.hw_key;
+ podev->platform_support.bus_scale_table = NULL;
+ podev->platform_support.sha_hmac = 1;
+
+ podev->platform_support.bus_scale_table =
+ (struct msm_bus_scale_pdata *)
+ msm_bus_cl_get_pdata(pdev);
+ if (!podev->platform_support.bus_scale_table)
+ pr_err("bus_scale_table is NULL\n");
+ } else {
+ platform_support =
+ (struct msm_ce_hw_support *)pdev->dev.platform_data;
+ podev->platform_support.ce_shared = platform_support->ce_shared;
+ podev->platform_support.shared_ce_resource =
+ platform_support->shared_ce_resource;
+ podev->platform_support.hw_key_support =
+ platform_support->hw_key_support;
+ podev->platform_support.bus_scale_table =
+ platform_support->bus_scale_table;
+ podev->platform_support.sha_hmac = platform_support->sha_hmac;
+ }
+ if (podev->platform_support.bus_scale_table != NULL) {
+ podev->bus_scale_handle =
+ msm_bus_scale_register_client(
+ (struct msm_bus_scale_pdata *)
+ podev->platform_support.bus_scale_table);
+ if (!podev->bus_scale_handle) {
+ pr_err("%s not able to get bus scale\n",
+ __func__);
+ rc = -ENOMEM;
+ goto err;
+ }
+ }
+
+ if (rc >= 0)
+ return 0;
+ else
+ if (podev->platform_support.bus_scale_table != NULL)
+ msm_bus_scale_unregister_client(
+ podev->bus_scale_handle);
+err:
+
+ if (handle)
+ qce_close(handle);
+ platform_set_drvdata(pdev, NULL);
+ podev->qce = NULL;
+ podev->pdev = NULL;
+ return rc;
+};
+
+static int qcedev_remove(struct platform_device *pdev)
+{
+ struct qcedev_control *podev;
+
+ podev = platform_get_drvdata(pdev);
+ if (!podev)
+ return 0;
+ if (podev->qce)
+ qce_close(podev->qce);
+
+ if (podev->platform_support.bus_scale_table != NULL)
+ msm_bus_scale_unregister_client(podev->bus_scale_handle);
+
+ if (podev->miscdevice.minor != MISC_DYNAMIC_MINOR)
+ misc_deregister(&podev->miscdevice);
+ tasklet_kill(&podev->done_tasklet);
+ return 0;
+};
+
+static int qcedev_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct qcedev_control *podev;
+ int ret;
+ podev = platform_get_drvdata(pdev);
+
+ if (!podev || !podev->platform_support.bus_scale_table)
+ return 0;
+
+ mutex_lock(&qcedev_sent_bw_req);
+ if (podev->high_bw_req_count) {
+ ret = msm_bus_scale_client_update_request(
+ podev->bus_scale_handle, 0);
+ if (ret) {
+ pr_err("%s Unable to set to low bandwidth\n",
+ __func__);
+ goto suspend_exit;
+ }
+ ret = qce_disable_clk(podev->qce);
+ if (ret) {
+ pr_err("%s Unable disable clk\n", __func__);
+ ret = msm_bus_scale_client_update_request(
+ podev->bus_scale_handle, 1);
+ if (ret)
+ pr_err("%s Unable to set to high bandwidth\n",
+ __func__);
+ goto suspend_exit;
+ }
+ }
+
+suspend_exit:
+ mutex_unlock(&qcedev_sent_bw_req);
+ return 0;
+}
+
+static int qcedev_resume(struct platform_device *pdev)
+{
+ struct qcedev_control *podev;
+ int ret;
+ podev = platform_get_drvdata(pdev);
+
+ if (!podev || !podev->platform_support.bus_scale_table)
+ return 0;
+
+ mutex_lock(&qcedev_sent_bw_req);
+ if (podev->high_bw_req_count) {
+ ret = qce_enable_clk(podev->qce);
+ if (ret) {
+ pr_err("%s Unable enable clk\n", __func__);
+ goto resume_exit;
+ }
+ ret = msm_bus_scale_client_update_request(
+ podev->bus_scale_handle, 1);
+ if (ret) {
+ pr_err("%s Unable to set to high bandwidth\n",
+ __func__);
+ ret = qce_disable_clk(podev->qce);
+ if (ret)
+ pr_err("%s Unable enable clk\n",
+ __func__);
+ goto resume_exit;
+ }
+ }
+
+resume_exit:
+ mutex_unlock(&qcedev_sent_bw_req);
+ return 0;
+}
+
+static struct of_device_id qcedev_match[] = {
+ { .compatible = "qcom,qcedev",
+ },
+ {}
+};
+
+static struct platform_driver qcedev_plat_driver = {
+ .probe = qcedev_probe,
+ .remove = qcedev_remove,
+ .suspend = qcedev_suspend,
+ .resume = qcedev_resume,
+ .driver = {
+ .name = "qce",
+ .owner = THIS_MODULE,
+ .of_match_table = qcedev_match,
+ },
+};
+
+static int _disp_stats(int id)
+{
+ struct qcedev_stat *pstat;
+ int len = 0;
+
+ pstat = &_qcedev_stat;
+ len = scnprintf(_debug_read_buf, DEBUG_MAX_RW_BUF - 1,
+ "\nQualcomm QCE dev driver %d Statistics:\n",
+ id + 1);
+
+ len += scnprintf(_debug_read_buf + len, DEBUG_MAX_RW_BUF - len - 1,
+ " Encryption operation success : %d\n",
+ pstat->qcedev_enc_success);
+ len += scnprintf(_debug_read_buf + len, DEBUG_MAX_RW_BUF - len - 1,
+ " Encryption operation fail : %d\n",
+ pstat->qcedev_enc_fail);
+ len += scnprintf(_debug_read_buf + len, DEBUG_MAX_RW_BUF - len - 1,
+ " Decryption operation success : %d\n",
+ pstat->qcedev_dec_success);
+
+ len += scnprintf(_debug_read_buf + len, DEBUG_MAX_RW_BUF - len - 1,
+ " Encryption operation fail : %d\n",
+ pstat->qcedev_dec_fail);
+
+ return len;
+}
+
+static int _debug_stats_open(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return 0;
+}
+
+static ssize_t _debug_stats_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ ssize_t rc = -EINVAL;
+ int qcedev = *((int *) file->private_data);
+ int len;
+
+ len = _disp_stats(qcedev);
+
+ if (len <= count)
+ rc = simple_read_from_buffer((void __user *) buf, len,
+ ppos, (void *) _debug_read_buf, len);
+ return rc;
+}
+
+static ssize_t _debug_stats_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ memset((char *)&_qcedev_stat, 0, sizeof(struct qcedev_stat));
+ return count;
+};
+
+static const struct file_operations _debug_stats_ops = {
+ .open = _debug_stats_open,
+ .read = _debug_stats_read,
+ .write = _debug_stats_write,
+};
+
+static int _qcedev_debug_init(void)
+{
+ int rc;
+ char name[DEBUG_MAX_FNAME];
+ struct dentry *dent;
+
+ _debug_dent = debugfs_create_dir("qcedev", NULL);
+ if (IS_ERR(_debug_dent)) {
+ pr_err("qcedev debugfs_create_dir fail, error %ld\n",
+ PTR_ERR(_debug_dent));
+ return PTR_ERR(_debug_dent);
+ }
+
+ snprintf(name, DEBUG_MAX_FNAME-1, "stats-%d", 1);
+ _debug_qcedev = 0;
+ dent = debugfs_create_file(name, 0644, _debug_dent,
+ &_debug_qcedev, &_debug_stats_ops);
+ if (dent == NULL) {
+ pr_err("qcedev debugfs_create_file fail, error %ld\n",
+ PTR_ERR(dent));
+ rc = PTR_ERR(dent);
+ goto err;
+ }
+ return 0;
+err:
+ debugfs_remove_recursive(_debug_dent);
+ return rc;
+}
+
+static int qcedev_init(void)
+{
+ int rc;
+
+ rc = _qcedev_debug_init();
+ if (rc)
+ return rc;
+ return platform_driver_register(&qcedev_plat_driver);
+}
+
+static void qcedev_exit(void)
+{
+ debugfs_remove_recursive(_debug_dent);
+ platform_driver_unregister(&qcedev_plat_driver);
+}
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Qualcomm DEV Crypto driver");
+
+module_init(qcedev_init);
+module_exit(qcedev_exit);