diff options
Diffstat (limited to 'drivers/staging/sep/sep_driver.c')
-rw-r--r-- | drivers/staging/sep/sep_driver.c | 2932 |
1 files changed, 0 insertions, 2932 deletions
diff --git a/drivers/staging/sep/sep_driver.c b/drivers/staging/sep/sep_driver.c deleted file mode 100644 index 6b3d156d4140..000000000000 --- a/drivers/staging/sep/sep_driver.c +++ /dev/null @@ -1,2932 +0,0 @@ -/* - * - * sep_driver.c - Security Processor Driver main group of functions - * - * Copyright(c) 2009,2010 Intel Corporation. All rights reserved. - * Contributions(c) 2009,2010 Discretix. 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 as published by the Free - * Software Foundation; version 2 of the License. - * - * 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. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 - * Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - * CONTACTS: - * - * Mark Allyn mark.a.allyn@intel.com - * Jayant Mangalampalli jayant.mangalampalli@intel.com - * - * CHANGES: - * - * 2009.06.26 Initial publish - * 2010.09.14 Upgrade to Medfield - * - */ -#include <linux/init.h> -#include <linux/module.h> -#include <linux/miscdevice.h> -#include <linux/fs.h> -#include <linux/cdev.h> -#include <linux/kdev_t.h> -#include <linux/mutex.h> -#include <linux/sched.h> -#include <linux/mm.h> -#include <linux/poll.h> -#include <linux/wait.h> -#include <linux/pci.h> -#include <linux/firmware.h> -#include <linux/slab.h> -#include <linux/ioctl.h> -#include <asm/current.h> -#include <linux/ioport.h> -#include <linux/io.h> -#include <linux/interrupt.h> -#include <linux/pagemap.h> -#include <asm/cacheflush.h> -#include <linux/delay.h> -#include <linux/jiffies.h> -#include <linux/rar_register.h> - -#include "sep_driver_hw_defs.h" -#include "sep_driver_config.h" -#include "sep_driver_api.h" -#include "sep_dev.h" - -/*---------------------------------------- - DEFINES ------------------------------------------*/ - -#define SEP_RAR_IO_MEM_REGION_SIZE 0x40000 - -/*-------------------------------------------- - GLOBAL variables ---------------------------------------------*/ - -/* Keep this a single static object for now to keep the conversion easy */ - -static struct sep_device *sep_dev; - -/** - * sep_dump_message - dump the message that is pending - * @sep: SEP device - */ -static void sep_dump_message(struct sep_device *sep) -{ - int count; - u32 *p = sep->shared_addr; - for (count = 0; count < 12 * 4; count += 4) - dev_dbg(&sep->pdev->dev, "Word %d of the message is %x\n", - count, *p++); -} - -/** - * sep_map_and_alloc_shared_area - allocate shared block - * @sep: security processor - * @size: size of shared area - */ -static int sep_map_and_alloc_shared_area(struct sep_device *sep) -{ - sep->shared_addr = dma_alloc_coherent(&sep->pdev->dev, - sep->shared_size, - &sep->shared_bus, GFP_KERNEL); - - if (!sep->shared_addr) { - dev_warn(&sep->pdev->dev, - "shared memory dma_alloc_coherent failed\n"); - return -ENOMEM; - } - dev_dbg(&sep->pdev->dev, - "shared_addr %zx bytes @%p (bus %llx)\n", - sep->shared_size, sep->shared_addr, - (unsigned long long)sep->shared_bus); - return 0; -} - -/** - * sep_unmap_and_free_shared_area - free shared block - * @sep: security processor - */ -static void sep_unmap_and_free_shared_area(struct sep_device *sep) -{ - dma_free_coherent(&sep->pdev->dev, sep->shared_size, - sep->shared_addr, sep->shared_bus); -} - -/** - * sep_shared_bus_to_virt - convert bus/virt addresses - * @sep: pointer to struct sep_device - * @bus_address: address to convert - * - * Returns virtual address inside the shared area according - * to the bus address. - */ -static void *sep_shared_bus_to_virt(struct sep_device *sep, - dma_addr_t bus_address) -{ - return sep->shared_addr + (bus_address - sep->shared_bus); -} - -/** - * open function for the singleton driver - * @inode_ptr struct inode * - * @file_ptr struct file * - * - * Called when the user opens the singleton device interface - */ -static int sep_singleton_open(struct inode *inode_ptr, struct file *file_ptr) -{ - struct sep_device *sep; - - /* - * Get the SEP device structure and use it for the - * private_data field in filp for other methods - */ - sep = sep_dev; - - file_ptr->private_data = sep; - - if (test_and_set_bit(0, &sep->singleton_access_flag)) - return -EBUSY; - return 0; -} - -/** - * sep_open - device open method - * @inode: inode of SEP device - * @filp: file handle to SEP device - * - * Open method for the SEP device. Called when userspace opens - * the SEP device node. - * - * Returns zero on success otherwise an error code. - */ -static int sep_open(struct inode *inode, struct file *filp) -{ - struct sep_device *sep; - - /* - * Get the SEP device structure and use it for the - * private_data field in filp for other methods - */ - sep = sep_dev; - filp->private_data = sep; - - /* Anyone can open; locking takes place at transaction level */ - return 0; -} - -/** - * sep_singleton_release - close a SEP singleton device - * @inode: inode of SEP device - * @filp: file handle being closed - * - * Called on the final close of a SEP device. As the open protects against - * multiple simultaenous opens that means this method is called when the - * final reference to the open handle is dropped. - */ -static int sep_singleton_release(struct inode *inode, struct file *filp) -{ - struct sep_device *sep = filp->private_data; - - clear_bit(0, &sep->singleton_access_flag); - return 0; -} - -/** - * sep_request_daemon_open - request daemon open method - * @inode: inode of SEP device - * @filp: file handle to SEP device - * - * Open method for the SEP request daemon. Called when - * request daemon in userspace opens the SEP device node. - * - * Returns zero on success otherwise an error code. - */ -static int sep_request_daemon_open(struct inode *inode, struct file *filp) -{ - struct sep_device *sep = sep_dev; - int error = 0; - - filp->private_data = sep; - - /* There is supposed to be only one request daemon */ - if (test_and_set_bit(0, &sep->request_daemon_open)) - error = -EBUSY; - return error; -} - -/** - * sep_request_daemon_release - close a SEP daemon - * @inode: inode of SEP device - * @filp: file handle being closed - * - * Called on the final close of a SEP daemon. - */ -static int sep_request_daemon_release(struct inode *inode, struct file *filp) -{ - struct sep_device *sep = filp->private_data; - - dev_dbg(&sep->pdev->dev, "Request daemon release for pid %d\n", - current->pid); - - /* Clear the request_daemon_open flag */ - clear_bit(0, &sep->request_daemon_open); - return 0; -} - -/** - * sep_req_daemon_send_reply_command_handler - poke the SEP - * @sep: struct sep_device * - * - * This function raises interrupt to SEPm that signals that is has a - * new command from HOST - */ -static int sep_req_daemon_send_reply_command_handler(struct sep_device *sep) -{ - unsigned long lck_flags; - - sep_dump_message(sep); - - /* Counters are lockable region */ - spin_lock_irqsave(&sep->snd_rply_lck, lck_flags); - sep->send_ct++; - sep->reply_ct++; - - /* Send the interrupt to SEP */ - sep_write_reg(sep, HW_HOST_HOST_SEP_GPR2_REG_ADDR, sep->send_ct); - sep->send_ct++; - - spin_unlock_irqrestore(&sep->snd_rply_lck, lck_flags); - - dev_dbg(&sep->pdev->dev, - "sep_req_daemon_send_reply send_ct %lx reply_ct %lx\n", - sep->send_ct, sep->reply_ct); - - return 0; -} - - -/** - * sep_free_dma_table_data_handler - free DMA table - * @sep: pointere to struct sep_device - * - * Handles the request to free DMA table for synchronic actions - */ -static int sep_free_dma_table_data_handler(struct sep_device *sep) -{ - int count; - int dcb_counter; - /* Pointer to the current dma_resource struct */ - struct sep_dma_resource *dma; - - for (dcb_counter = 0; dcb_counter < sep->nr_dcb_creat; dcb_counter++) { - dma = &sep->dma_res_arr[dcb_counter]; - - /* Unmap and free input map array */ - if (dma->in_map_array) { - for (count = 0; count < dma->in_num_pages; count++) { - dma_unmap_page(&sep->pdev->dev, - dma->in_map_array[count].dma_addr, - dma->in_map_array[count].size, - DMA_TO_DEVICE); - } - kfree(dma->in_map_array); - } - - /* Unmap output map array, DON'T free it yet */ - if (dma->out_map_array) { - for (count = 0; count < dma->out_num_pages; count++) { - dma_unmap_page(&sep->pdev->dev, - dma->out_map_array[count].dma_addr, - dma->out_map_array[count].size, - DMA_FROM_DEVICE); - } - kfree(dma->out_map_array); - } - - /* Free page cache for output */ - if (dma->in_page_array) { - for (count = 0; count < dma->in_num_pages; count++) { - flush_dcache_page(dma->in_page_array[count]); - page_cache_release(dma->in_page_array[count]); - } - kfree(dma->in_page_array); - } - - if (dma->out_page_array) { - for (count = 0; count < dma->out_num_pages; count++) { - if (!PageReserved(dma->out_page_array[count])) - SetPageDirty(dma->out_page_array[count]); - flush_dcache_page(dma->out_page_array[count]); - page_cache_release(dma->out_page_array[count]); - } - kfree(dma->out_page_array); - } - - /* Reset all the values */ - dma->in_page_array = NULL; - dma->out_page_array = NULL; - dma->in_num_pages = 0; - dma->out_num_pages = 0; - dma->in_map_array = NULL; - dma->out_map_array = NULL; - dma->in_map_num_entries = 0; - dma->out_map_num_entries = 0; - } - - sep->nr_dcb_creat = 0; - sep->num_lli_tables_created = 0; - - return 0; -} - -/** - * sep_request_daemon_mmap - maps the shared area to user space - * @filp: pointer to struct file - * @vma: pointer to vm_area_struct - * - * Called by the kernel when the daemon attempts an mmap() syscall - * using our handle. - */ -static int sep_request_daemon_mmap(struct file *filp, - struct vm_area_struct *vma) -{ - struct sep_device *sep = filp->private_data; - dma_addr_t bus_address; - int error = 0; - - if ((vma->vm_end - vma->vm_start) > SEP_DRIVER_MMMAP_AREA_SIZE) { - error = -EINVAL; - goto end_function; - } - - /* Get physical address */ - bus_address = sep->shared_bus; - - if (remap_pfn_range(vma, vma->vm_start, bus_address >> PAGE_SHIFT, - vma->vm_end - vma->vm_start, vma->vm_page_prot)) { - - dev_warn(&sep->pdev->dev, "remap_page_range failed\n"); - error = -EAGAIN; - goto end_function; - } - -end_function: - return error; -} - -/** - * sep_request_daemon_poll - poll implementation - * @sep: struct sep_device * for current SEP device - * @filp: struct file * for open file - * @wait: poll_table * for poll - * - * Called when our device is part of a poll() or select() syscall - */ -static unsigned int sep_request_daemon_poll(struct file *filp, - poll_table *wait) -{ - u32 mask = 0; - /* GPR2 register */ - u32 retval2; - unsigned long lck_flags; - struct sep_device *sep = filp->private_data; - - poll_wait(filp, &sep->event_request_daemon, wait); - - dev_dbg(&sep->pdev->dev, "daemon poll: send_ct is %lx reply ct is %lx\n", - sep->send_ct, sep->reply_ct); - - spin_lock_irqsave(&sep->snd_rply_lck, lck_flags); - /* Check if the data is ready */ - if (sep->send_ct == sep->reply_ct) { - spin_unlock_irqrestore(&sep->snd_rply_lck, lck_flags); - - retval2 = sep_read_reg(sep, HW_HOST_SEP_HOST_GPR2_REG_ADDR); - dev_dbg(&sep->pdev->dev, - "daemon poll: data check (GPR2) is %x\n", retval2); - - /* Check if PRINT request */ - if ((retval2 >> 30) & 0x1) { - dev_dbg(&sep->pdev->dev, "daemon poll: PRINTF request in\n"); - mask |= POLLIN; - goto end_function; - } - /* Check if NVS request */ - if (retval2 >> 31) { - dev_dbg(&sep->pdev->dev, "daemon poll: NVS request in\n"); - mask |= POLLPRI | POLLWRNORM; - } - } else { - spin_unlock_irqrestore(&sep->snd_rply_lck, lck_flags); - dev_dbg(&sep->pdev->dev, - "daemon poll: no reply received; returning 0\n"); - mask = 0; - } -end_function: - return mask; -} - -/** - * sep_release - close a SEP device - * @inode: inode of SEP device - * @filp: file handle being closed - * - * Called on the final close of a SEP device. - */ -static int sep_release(struct inode *inode, struct file *filp) -{ - struct sep_device *sep = filp->private_data; - - dev_dbg(&sep->pdev->dev, "Release for pid %d\n", current->pid); - - mutex_lock(&sep->sep_mutex); - /* Is this the process that has a transaction open? - * If so, lets reset pid_doing_transaction to 0 and - * clear the in use flags, and then wake up sep_event - * so that other processes can do transactions - */ - if (sep->pid_doing_transaction == current->pid) { - clear_bit(SEP_MMAP_LOCK_BIT, &sep->in_use_flags); - clear_bit(SEP_SEND_MSG_LOCK_BIT, &sep->in_use_flags); - sep_free_dma_table_data_handler(sep); - wake_up(&sep->event); - sep->pid_doing_transaction = 0; - } - - mutex_unlock(&sep->sep_mutex); - return 0; -} - -/** - * sep_mmap - maps the shared area to user space - * @filp: pointer to struct file - * @vma: pointer to vm_area_struct - * - * Called on an mmap of our space via the normal SEP device - */ -static int sep_mmap(struct file *filp, struct vm_area_struct *vma) -{ - dma_addr_t bus_addr; - struct sep_device *sep = filp->private_data; - unsigned long error = 0; - - /* Set the transaction busy (own the device) */ - wait_event_interruptible(sep->event, - test_and_set_bit(SEP_MMAP_LOCK_BIT, - &sep->in_use_flags) == 0); - - if (signal_pending(current)) { - error = -EINTR; - goto end_function_with_error; - } - /* - * The pid_doing_transaction indicates that this process - * now owns the facilities to performa a transaction with - * the SEP. While this process is performing a transaction, - * no other process who has the SEP device open can perform - * any transactions. This method allows more than one process - * to have the device open at any given time, which provides - * finer granularity for device utilization by multiple - * processes. - */ - mutex_lock(&sep->sep_mutex); - sep->pid_doing_transaction = current->pid; - mutex_unlock(&sep->sep_mutex); - - /* Zero the pools and the number of data pool alocation pointers */ - sep->data_pool_bytes_allocated = 0; - sep->num_of_data_allocations = 0; - - /* - * Check that the size of the mapped range is as the size of the message - * shared area - */ - if ((vma->vm_end - vma->vm_start) > SEP_DRIVER_MMMAP_AREA_SIZE) { - error = -EINVAL; - goto end_function_with_error; - } - - dev_dbg(&sep->pdev->dev, "shared_addr is %p\n", sep->shared_addr); - - /* Get bus address */ - bus_addr = sep->shared_bus; - - if (remap_pfn_range(vma, vma->vm_start, bus_addr >> PAGE_SHIFT, - vma->vm_end - vma->vm_start, vma->vm_page_prot)) { - dev_warn(&sep->pdev->dev, "remap_page_range failed\n"); - error = -EAGAIN; - goto end_function_with_error; - } - goto end_function; - -end_function_with_error: - /* Clear the bit */ - clear_bit(SEP_MMAP_LOCK_BIT, &sep->in_use_flags); - mutex_lock(&sep->sep_mutex); - sep->pid_doing_transaction = 0; - mutex_unlock(&sep->sep_mutex); - - /* Raise event for stuck contextes */ - - wake_up(&sep->event); - -end_function: - return error; -} - -/** - * sep_poll - poll handler - * @filp: pointer to struct file - * @wait: pointer to poll_table - * - * Called by the OS when the kernel is asked to do a poll on - * a SEP file handle. - */ -static unsigned int sep_poll(struct file *filp, poll_table *wait) -{ - u32 mask = 0; - u32 retval = 0; - u32 retval2 = 0; - unsigned long lck_flags; - - struct sep_device *sep = filp->private_data; - - /* Am I the process that owns the transaction? */ - mutex_lock(&sep->sep_mutex); - if (current->pid != sep->pid_doing_transaction) { - dev_dbg(&sep->pdev->dev, "poll; wrong pid\n"); - mask = POLLERR; - mutex_unlock(&sep->sep_mutex); - goto end_function; - } - mutex_unlock(&sep->sep_mutex); - - /* Check if send command or send_reply were activated previously */ - if (!test_bit(SEP_SEND_MSG_LOCK_BIT, &sep->in_use_flags)) { - mask = POLLERR; - goto end_function; - } - - /* Add the event to the polling wait table */ - dev_dbg(&sep->pdev->dev, "poll: calling wait sep_event\n"); - - poll_wait(filp, &sep->event, wait); - - dev_dbg(&sep->pdev->dev, "poll: send_ct is %lx reply ct is %lx\n", - sep->send_ct, sep->reply_ct); - - /* Check if error occurred during poll */ - retval2 = sep_read_reg(sep, HW_HOST_SEP_HOST_GPR3_REG_ADDR); - if (retval2 != 0x0) { - dev_warn(&sep->pdev->dev, "poll; poll error %x\n", retval2); - mask |= POLLERR; - goto end_function; - } - - spin_lock_irqsave(&sep->snd_rply_lck, lck_flags); - - if (sep->send_ct == sep->reply_ct) { - spin_unlock_irqrestore(&sep->snd_rply_lck, lck_flags); - retval = sep_read_reg(sep, HW_HOST_SEP_HOST_GPR2_REG_ADDR); - dev_dbg(&sep->pdev->dev, "poll: data ready check (GPR2) %x\n", - retval); - - /* Check if printf request */ - if ((retval >> 30) & 0x1) { - dev_dbg(&sep->pdev->dev, "poll: SEP printf request\n"); - wake_up(&sep->event_request_daemon); - goto end_function; - } - - /* Check if the this is SEP reply or request */ - if (retval >> 31) { - dev_dbg(&sep->pdev->dev, "poll: SEP request\n"); - wake_up(&sep->event_request_daemon); - } else { - dev_dbg(&sep->pdev->dev, "poll: normal return\n"); - /* In case it is again by send_reply_comand */ - clear_bit(SEP_SEND_MSG_LOCK_BIT, &sep->in_use_flags); - sep_dump_message(sep); - dev_dbg(&sep->pdev->dev, - "poll; SEP reply POLLIN | POLLRDNORM\n"); - mask |= POLLIN | POLLRDNORM; - } - } else { - spin_unlock_irqrestore(&sep->snd_rply_lck, lck_flags); - dev_dbg(&sep->pdev->dev, - "poll; no reply received; returning mask of 0\n"); - mask = 0; - } - -end_function: - return mask; -} - -/** - * sep_time_address - address in SEP memory of time - * @sep: SEP device we want the address from - * - * Return the address of the two dwords in memory used for time - * setting. - */ -static u32 *sep_time_address(struct sep_device *sep) -{ - return sep->shared_addr + SEP_DRIVER_SYSTEM_TIME_MEMORY_OFFSET_IN_BYTES; -} - -/** - * sep_set_time - set the SEP time - * @sep: the SEP we are setting the time for - * - * Calculates time and sets it at the predefined address. - * Called with the SEP mutex held. - */ -static unsigned long sep_set_time(struct sep_device *sep) -{ - struct timeval time; - u32 *time_addr; /* Address of time as seen by the kernel */ - - - do_gettimeofday(&time); - - /* Set value in the SYSTEM MEMORY offset */ - time_addr = sep_time_address(sep); - - time_addr[0] = SEP_TIME_VAL_TOKEN; - time_addr[1] = time.tv_sec; - - dev_dbg(&sep->pdev->dev, "time.tv_sec is %lu\n", time.tv_sec); - dev_dbg(&sep->pdev->dev, "time_addr is %p\n", time_addr); - dev_dbg(&sep->pdev->dev, "sep->shared_addr is %p\n", sep->shared_addr); - - return time.tv_sec; -} - -/** - * sep_set_caller_id_handler - insert caller id entry - * @sep: SEP device - * @arg: pointer to struct caller_id_struct - * - * Inserts the data into the caller id table. Note that this function - * falls under the ioctl lock - */ -static int sep_set_caller_id_handler(struct sep_device *sep, unsigned long arg) -{ - void __user *hash; - int error = 0; - int i; - struct caller_id_struct command_args; - - for (i = 0; i < SEP_CALLER_ID_TABLE_NUM_ENTRIES; i++) { - if (sep->caller_id_table[i].pid == 0) - break; - } - - if (i == SEP_CALLER_ID_TABLE_NUM_ENTRIES) { - dev_dbg(&sep->pdev->dev, "no more caller id entries left\n"); - dev_dbg(&sep->pdev->dev, "maximum number is %d\n", - SEP_CALLER_ID_TABLE_NUM_ENTRIES); - error = -EUSERS; - goto end_function; - } - - /* Copy the data */ - if (copy_from_user(&command_args, (void __user *)arg, - sizeof(command_args))) { - error = -EFAULT; - goto end_function; - } - - hash = (void __user *)(unsigned long)command_args.callerIdAddress; - - if (!command_args.pid || !command_args.callerIdSizeInBytes) { - error = -EINVAL; - goto end_function; - } - - dev_dbg(&sep->pdev->dev, "pid is %x\n", command_args.pid); - dev_dbg(&sep->pdev->dev, "callerIdSizeInBytes is %x\n", - command_args.callerIdSizeInBytes); - - if (command_args.callerIdSizeInBytes > - SEP_CALLER_ID_HASH_SIZE_IN_BYTES) { - error = -EMSGSIZE; - goto end_function; - } - - sep->caller_id_table[i].pid = command_args.pid; - - if (copy_from_user(sep->caller_id_table[i].callerIdHash, - hash, command_args.callerIdSizeInBytes)) - error = -EFAULT; -end_function: - return error; -} - -/** - * sep_set_current_caller_id - set the caller id - * @sep: pointer to struct_sep_device - * - * Set the caller ID (if it exists) to the SEP. Note that this - * function falls under the ioctl lock - */ -static int sep_set_current_caller_id(struct sep_device *sep) -{ - int i; - u32 *hash_buf_ptr; - - /* Zero the previous value */ - memset(sep->shared_addr + SEP_CALLER_ID_OFFSET_BYTES, - 0, SEP_CALLER_ID_HASH_SIZE_IN_BYTES); - - for (i = 0; i < SEP_CALLER_ID_TABLE_NUM_ENTRIES; i++) { - if (sep->caller_id_table[i].pid == current->pid) { - dev_dbg(&sep->pdev->dev, "Caller Id found\n"); - - memcpy(sep->shared_addr + SEP_CALLER_ID_OFFSET_BYTES, - (void *)(sep->caller_id_table[i].callerIdHash), - SEP_CALLER_ID_HASH_SIZE_IN_BYTES); - break; - } - } - /* Ensure data is in little endian */ - hash_buf_ptr = (u32 *)sep->shared_addr + - SEP_CALLER_ID_OFFSET_BYTES; - - for (i = 0; i < SEP_CALLER_ID_HASH_SIZE_IN_WORDS; i++) - hash_buf_ptr[i] = cpu_to_le32(hash_buf_ptr[i]); - - return 0; -} - -/** - * sep_send_command_handler - kick off a command - * @sep: SEP being signalled - * - * This function raises interrupt to SEP that signals that is has a new - * command from the host - * - * Note that this function does fall under the ioctl lock - */ -static int sep_send_command_handler(struct sep_device *sep) -{ - unsigned long lck_flags; - int error = 0; - - if (test_and_set_bit(SEP_SEND_MSG_LOCK_BIT, &sep->in_use_flags)) { - error = -EPROTO; - goto end_function; - } - sep_set_time(sep); - - sep_set_current_caller_id(sep); - - sep_dump_message(sep); - - /* Update counter */ - spin_lock_irqsave(&sep->snd_rply_lck, lck_flags); - sep->send_ct++; - spin_unlock_irqrestore(&sep->snd_rply_lck, lck_flags); - - dev_dbg(&sep->pdev->dev, - "sep_send_command_handler send_ct %lx reply_ct %lx\n", - sep->send_ct, sep->reply_ct); - - /* Send interrupt to SEP */ - sep_write_reg(sep, HW_HOST_HOST_SEP_GPR0_REG_ADDR, 0x2); - -end_function: - return error; -} - -/** - * sep_allocate_data_pool_memory_handler -allocate pool memory - * @sep: pointer to struct sep_device - * @arg: pointer to struct alloc_struct - * - * This function handles the allocate data pool memory request - * This function returns calculates the bus address of the - * allocated memory, and the offset of this area from the mapped address. - * Therefore, the FVOs in user space can calculate the exact virtual - * address of this allocated memory - */ -static int sep_allocate_data_pool_memory_handler(struct sep_device *sep, - unsigned long arg) -{ - int error = 0; - struct alloc_struct command_args; - - /* Holds the allocated buffer address in the system memory pool */ - u32 *token_addr; - - if (copy_from_user(&command_args, (void __user *)arg, - sizeof(struct alloc_struct))) { - error = -EFAULT; - goto end_function; - } - - /* Allocate memory */ - if ((sep->data_pool_bytes_allocated + command_args.num_bytes) > - SEP_DRIVER_DATA_POOL_SHARED_AREA_SIZE_IN_BYTES) { - error = -ENOMEM; - goto end_function; - } - - dev_dbg(&sep->pdev->dev, - "data pool bytes_allocated: %x\n", (int)sep->data_pool_bytes_allocated); - dev_dbg(&sep->pdev->dev, - "offset: %x\n", SEP_DRIVER_DATA_POOL_AREA_OFFSET_IN_BYTES); - /* Set the virtual and bus address */ - command_args.offset = SEP_DRIVER_DATA_POOL_AREA_OFFSET_IN_BYTES + - sep->data_pool_bytes_allocated; - - /* Place in the shared area that is known by the SEP */ - token_addr = (u32 *)(sep->shared_addr + - SEP_DRIVER_DATA_POOL_ALLOCATION_OFFSET_IN_BYTES + - (sep->num_of_data_allocations)*2*sizeof(u32)); - - token_addr[0] = SEP_DATA_POOL_POINTERS_VAL_TOKEN; - token_addr[1] = (u32)sep->shared_bus + - SEP_DRIVER_DATA_POOL_AREA_OFFSET_IN_BYTES + - sep->data_pool_bytes_allocated; - - /* Write the memory back to the user space */ - error = copy_to_user((void *)arg, (void *)&command_args, - sizeof(struct alloc_struct)); - if (error) { - error = -EFAULT; - goto end_function; - } - - /* Update the allocation */ - sep->data_pool_bytes_allocated += command_args.num_bytes; - sep->num_of_data_allocations += 1; - -end_function: - return error; -} - -/** - * sep_lock_kernel_pages - map kernel pages for DMA - * @sep: pointer to struct sep_device - * @kernel_virt_addr: address of data buffer in kernel - * @data_size: size of data - * @lli_array_ptr: lli array - * @in_out_flag: input into device or output from device - * - * This function locks all the physical pages of the kernel virtual buffer - * and construct a basic lli array, where each entry holds the physical - * page address and the size that application data holds in this page - * This function is used only during kernel crypto mod calls from within - * the kernel (when ioctl is not used) - */ -static int sep_lock_kernel_pages(struct sep_device *sep, - unsigned long kernel_virt_addr, - u32 data_size, - struct sep_lli_entry **lli_array_ptr, - int in_out_flag) - -{ - int error = 0; - /* Array of lli */ - struct sep_lli_entry *lli_array; - /* Map array */ - struct sep_dma_map *map_array; - - dev_dbg(&sep->pdev->dev, "lock kernel pages kernel_virt_addr is %08lx\n", - (unsigned long)kernel_virt_addr); - dev_dbg(&sep->pdev->dev, "data_size is %x\n", data_size); - - lli_array = kmalloc(sizeof(struct sep_lli_entry), GFP_ATOMIC); - if (!lli_array) { - error = -ENOMEM; - goto end_function; - } - map_array = kmalloc(sizeof(struct sep_dma_map), GFP_ATOMIC); - if (!map_array) { - error = -ENOMEM; - goto end_function_with_error; - } - - map_array[0].dma_addr = - dma_map_single(&sep->pdev->dev, (void *)kernel_virt_addr, - data_size, DMA_BIDIRECTIONAL); - map_array[0].size = data_size; - - - /* - * Set the start address of the first page - app data may start not at - * the beginning of the page - */ - lli_array[0].bus_address = (u32)map_array[0].dma_addr; - lli_array[0].block_size = map_array[0].size; - - dev_dbg(&sep->pdev->dev, - "lli_array[0].bus_address is %08lx, lli_array[0].block_size is %x\n", - (unsigned long)lli_array[0].bus_address, - lli_array[0].block_size); - - /* Set the output parameters */ - if (in_out_flag == SEP_DRIVER_IN_FLAG) { - *lli_array_ptr = lli_array; - sep->dma_res_arr[sep->nr_dcb_creat].in_num_pages = 1; - sep->dma_res_arr[sep->nr_dcb_creat].in_page_array = NULL; - sep->dma_res_arr[sep->nr_dcb_creat].in_map_array = map_array; - sep->dma_res_arr[sep->nr_dcb_creat].in_map_num_entries = 1; - } else { - *lli_array_ptr = lli_array; - sep->dma_res_arr[sep->nr_dcb_creat].out_num_pages = 1; - sep->dma_res_arr[sep->nr_dcb_creat].out_page_array = NULL; - sep->dma_res_arr[sep->nr_dcb_creat].out_map_array = map_array; - sep->dma_res_arr[sep->nr_dcb_creat].out_map_num_entries = 1; - } - goto end_function; - -end_function_with_error: - kfree(lli_array); - -end_function: - return error; -} - -/** - * sep_lock_user_pages - lock and map user pages for DMA - * @sep: pointer to struct sep_device - * @app_virt_addr: user memory data buffer - * @data_size: size of data buffer - * @lli_array_ptr: lli array - * @in_out_flag: input or output to device - * - * This function locks all the physical pages of the application - * virtual buffer and construct a basic lli array, where each entry - * holds the physical page address and the size that application - * data holds in this physical pages - */ -static int sep_lock_user_pages(struct sep_device *sep, - u32 app_virt_addr, - u32 data_size, - struct sep_lli_entry **lli_array_ptr, - int in_out_flag) - -{ - int error = 0; - u32 count; - int result; - /* The the page of the end address of the user space buffer */ - u32 end_page; - /* The page of the start address of the user space buffer */ - u32 start_page; - /* The range in pages */ - u32 num_pages; - /* Array of pointers to page */ - struct page **page_array; - /* Array of lli */ - struct sep_lli_entry *lli_array; - /* Map array */ - struct sep_dma_map *map_array; - /* Direction of the DMA mapping for locked pages */ - enum dma_data_direction dir; - - /* Set start and end pages and num pages */ - end_page = (app_virt_addr + data_size - 1) >> PAGE_SHIFT; - start_page = app_virt_addr >> PAGE_SHIFT; - num_pages = end_page - start_page + 1; - - dev_dbg(&sep->pdev->dev, "lock user pages app_virt_addr is %x\n", app_virt_addr); - dev_dbg(&sep->pdev->dev, "data_size is %x\n", data_size); - dev_dbg(&sep->pdev->dev, "start_page is %x\n", start_page); - dev_dbg(&sep->pdev->dev, "end_page is %x\n", end_page); - dev_dbg(&sep->pdev->dev, "num_pages is %x\n", num_pages); - - /* Allocate array of pages structure pointers */ - page_array = kmalloc(sizeof(struct page *) * num_pages, GFP_ATOMIC); - if (!page_array) { - error = -ENOMEM; - goto end_function; - } - map_array = kmalloc(sizeof(struct sep_dma_map) * num_pages, GFP_ATOMIC); - if (!map_array) { - dev_warn(&sep->pdev->dev, "kmalloc for map_array failed\n"); - error = -ENOMEM; - goto end_function_with_error1; - } - - lli_array = kmalloc(sizeof(struct sep_lli_entry) * num_pages, - GFP_ATOMIC); - - if (!lli_array) { - dev_warn(&sep->pdev->dev, "kmalloc for lli_array failed\n"); - error = -ENOMEM; - goto end_function_with_error2; - } - - /* Convert the application virtual address into a set of physical */ - down_read(¤t->mm->mmap_sem); - result = get_user_pages(current, current->mm, app_virt_addr, - num_pages, - ((in_out_flag == SEP_DRIVER_IN_FLAG) ? 0 : 1), - 0, page_array, NULL); - - up_read(¤t->mm->mmap_sem); - - /* Check the number of pages locked - if not all then exit with error */ - if (result != num_pages) { - dev_warn(&sep->pdev->dev, - "not all pages locked by get_user_pages\n"); - error = -ENOMEM; - goto end_function_with_error3; - } - - dev_dbg(&sep->pdev->dev, "get_user_pages succeeded\n"); - - /* Set direction */ - if (in_out_flag == SEP_DRIVER_IN_FLAG) - dir = DMA_TO_DEVICE; - else - dir = DMA_FROM_DEVICE; - - /* - * Fill the array using page array data and - * map the pages - this action will also flush the cache as needed - */ - for (count = 0; count < num_pages; count++) { - /* Fill the map array */ - map_array[count].dma_addr = - dma_map_page(&sep->pdev->dev, page_array[count], - 0, PAGE_SIZE, /*dir*/DMA_BIDIRECTIONAL); - - map_array[count].size = PAGE_SIZE; - - /* Fill the lli array entry */ - lli_array[count].bus_address = (u32)map_array[count].dma_addr; - lli_array[count].block_size = PAGE_SIZE; - - dev_warn(&sep->pdev->dev, "lli_array[%x].bus_address is %08lx, lli_array[%x].block_size is %x\n", - count, (unsigned long)lli_array[count].bus_address, - count, lli_array[count].block_size); - } - - /* Check the offset for the first page */ - lli_array[0].bus_address = - lli_array[0].bus_address + (app_virt_addr & (~PAGE_MASK)); - - /* Check that not all the data is in the first page only */ - if ((PAGE_SIZE - (app_virt_addr & (~PAGE_MASK))) >= data_size) - lli_array[0].block_size = data_size; - else - lli_array[0].block_size = - PAGE_SIZE - (app_virt_addr & (~PAGE_MASK)); - - dev_dbg(&sep->pdev->dev, - "lli_array[0].bus_address is %08lx, lli_array[0].block_size is %x\n", - (unsigned long)lli_array[count].bus_address, - lli_array[count].block_size); - - /* Check the size of the last page */ - if (num_pages > 1) { - lli_array[num_pages - 1].block_size = - (app_virt_addr + data_size) & (~PAGE_MASK); - if (lli_array[num_pages - 1].block_size == 0) - lli_array[num_pages - 1].block_size = PAGE_SIZE; - - dev_warn(&sep->pdev->dev, - "lli_array[%x].bus_address is " - "%08lx, lli_array[%x].block_size is %x\n", - num_pages - 1, - (unsigned long)lli_array[num_pages - 1].bus_address, - num_pages - 1, - lli_array[num_pages - 1].block_size); - } - - /* Set output params according to the in_out flag */ - if (in_out_flag == SEP_DRIVER_IN_FLAG) { - *lli_array_ptr = lli_array; - sep->dma_res_arr[sep->nr_dcb_creat].in_num_pages = num_pages; - sep->dma_res_arr[sep->nr_dcb_creat].in_page_array = page_array; - sep->dma_res_arr[sep->nr_dcb_creat].in_map_array = map_array; - sep->dma_res_arr[sep->nr_dcb_creat].in_map_num_entries = - num_pages; - } else { - *lli_array_ptr = lli_array; - sep->dma_res_arr[sep->nr_dcb_creat].out_num_pages = num_pages; - sep->dma_res_arr[sep->nr_dcb_creat].out_page_array = - page_array; - sep->dma_res_arr[sep->nr_dcb_creat].out_map_array = map_array; - sep->dma_res_arr[sep->nr_dcb_creat].out_map_num_entries = - num_pages; - } - goto end_function; - -end_function_with_error3: - /* Free lli array */ - kfree(lli_array); - -end_function_with_error2: - kfree(map_array); - -end_function_with_error1: - /* Free page array */ - kfree(page_array); - -end_function: - return error; -} - -/** - * u32 sep_calculate_lli_table_max_size - size the LLI table - * @sep: pointer to struct sep_device - * @lli_in_array_ptr - * @num_array_entries - * @last_table_flag - * - * This function calculates the size of data that can be inserted into - * the lli table from this array, such that either the table is full - * (all entries are entered), or there are no more entries in the - * lli array - */ -static u32 sep_calculate_lli_table_max_size(struct sep_device *sep, - struct sep_lli_entry *lli_in_array_ptr, - u32 num_array_entries, - u32 *last_table_flag) -{ - u32 counter; - /* Table data size */ - u32 table_data_size = 0; - /* Data size for the next table */ - u32 next_table_data_size; - - *last_table_flag = 0; - - /* - * Calculate the data in the out lli table till we fill the whole - * table or till the data has ended - */ - for (counter = 0; - (counter < (SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP - 1)) && - (counter < num_array_entries); counter++) - table_data_size += lli_in_array_ptr[counter].block_size; - - /* - * Check if we reached the last entry, - * meaning this ia the last table to build, - * and no need to check the block alignment - */ - if (counter == num_array_entries) { - /* Set the last table flag */ - *last_table_flag = 1; - goto end_function; - } - - /* - * Calculate the data size of the next table. - * Stop if no entries left or if data size is more the DMA restriction - */ - next_table_data_size = 0; - for (; counter < num_array_entries; counter++) { - next_table_data_size += lli_in_array_ptr[counter].block_size; - if (next_table_data_size >= SEP_DRIVER_MIN_DATA_SIZE_PER_TABLE) - break; - } - - /* - * Check if the next table data size is less then DMA rstriction. - * if it is - recalculate the current table size, so that the next - * table data size will be adaquete for DMA - */ - if (next_table_data_size && - next_table_data_size < SEP_DRIVER_MIN_DATA_SIZE_PER_TABLE) - - table_data_size -= (SEP_DRIVER_MIN_DATA_SIZE_PER_TABLE - - next_table_data_size); - -end_function: - return table_data_size; -} - -/** - * sep_build_lli_table - build an lli array for the given table - * @sep: pointer to struct sep_device - * @lli_array_ptr: pointer to lli array - * @lli_table_ptr: pointer to lli table - * @num_processed_entries_ptr: pointer to number of entries - * @num_table_entries_ptr: pointer to number of tables - * @table_data_size: total data size - * - * Builds ant lli table from the lli_array according to - * the given size of data - */ -static void sep_build_lli_table(struct sep_device *sep, - struct sep_lli_entry *lli_array_ptr, - struct sep_lli_entry *lli_table_ptr, - u32 *num_processed_entries_ptr, - u32 *num_table_entries_ptr, - u32 table_data_size) -{ - /* Current table data size */ - u32 curr_table_data_size; - /* Counter of lli array entry */ - u32 array_counter; - - /* Init current table data size and lli array entry counter */ - curr_table_data_size = 0; - array_counter = 0; - *num_table_entries_ptr = 1; - - dev_dbg(&sep->pdev->dev, "build lli table table_data_size is %x\n", table_data_size); - - /* Fill the table till table size reaches the needed amount */ - while (curr_table_data_size < table_data_size) { - /* Update the number of entries in table */ - (*num_table_entries_ptr)++; - - lli_table_ptr->bus_address = - cpu_to_le32(lli_array_ptr[array_counter].bus_address); - - lli_table_ptr->block_size = - cpu_to_le32(lli_array_ptr[array_counter].block_size); - - curr_table_data_size += lli_array_ptr[array_counter].block_size; - - dev_dbg(&sep->pdev->dev, "lli_table_ptr is %p\n", - lli_table_ptr); - dev_dbg(&sep->pdev->dev, "lli_table_ptr->bus_address is %08lx\n", - (unsigned long)lli_table_ptr->bus_address); - dev_dbg(&sep->pdev->dev, "lli_table_ptr->block_size is %x\n", - lli_table_ptr->block_size); - - /* Check for overflow of the table data */ - if (curr_table_data_size > table_data_size) { - dev_dbg(&sep->pdev->dev, - "curr_table_data_size too large\n"); - - /* Update the size of block in the table */ - lli_table_ptr->block_size -= - cpu_to_le32((curr_table_data_size - table_data_size)); - - /* Update the physical address in the lli array */ - lli_array_ptr[array_counter].bus_address += - cpu_to_le32(lli_table_ptr->block_size); - - /* Update the block size left in the lli array */ - lli_array_ptr[array_counter].block_size = - (curr_table_data_size - table_data_size); - } else - /* Advance to the next entry in the lli_array */ - array_counter++; - - dev_dbg(&sep->pdev->dev, - "lli_table_ptr->bus_address is %08lx\n", - (unsigned long)lli_table_ptr->bus_address); - dev_dbg(&sep->pdev->dev, - "lli_table_ptr->block_size is %x\n", - lli_table_ptr->block_size); - - /* Move to the next entry in table */ - lli_table_ptr++; - } - - /* Set the info entry to default */ - lli_table_ptr->bus_address = 0xffffffff; - lli_table_ptr->block_size = 0; - - /* Set the output parameter */ - *num_processed_entries_ptr += array_counter; - -} - -/** - * sep_shared_area_virt_to_bus - map shared area to bus address - * @sep: pointer to struct sep_device - * @virt_address: virtual address to convert - * - * This functions returns the physical address inside shared area according - * to the virtual address. It can be either on the externa RAM device - * (ioremapped), or on the system RAM - * This implementation is for the external RAM - */ -static dma_addr_t sep_shared_area_virt_to_bus(struct sep_device *sep, - void *virt_address) -{ - dev_dbg(&sep->pdev->dev, "sh virt to phys v %p\n", virt_address); - dev_dbg(&sep->pdev->dev, "sh virt to phys p %08lx\n", - (unsigned long) - sep->shared_bus + (virt_address - sep->shared_addr)); - - return sep->shared_bus + (size_t)(virt_address - sep->shared_addr); -} - -/** - * sep_shared_area_bus_to_virt - map shared area bus address to kernel - * @sep: pointer to struct sep_device - * @bus_address: bus address to convert - * - * This functions returns the virtual address inside shared area - * according to the physical address. It can be either on the - * externa RAM device (ioremapped), or on the system RAM - * This implementation is for the external RAM - */ -static void *sep_shared_area_bus_to_virt(struct sep_device *sep, - dma_addr_t bus_address) -{ - dev_dbg(&sep->pdev->dev, "shared bus to virt b=%lx v=%lx\n", - (unsigned long)bus_address, (unsigned long)(sep->shared_addr + - (size_t)(bus_address - sep->shared_bus))); - - return sep->shared_addr + (size_t)(bus_address - sep->shared_bus); -} - -/** - * sep_debug_print_lli_tables - dump LLI table - * @sep: pointer to struct sep_device - * @lli_table_ptr: pointer to sep_lli_entry - * @num_table_entries: number of entries - * @table_data_size: total data size - * - * Walk the the list of the print created tables and print all the data - */ -static void sep_debug_print_lli_tables(struct sep_device *sep, - struct sep_lli_entry *lli_table_ptr, - unsigned long num_table_entries, - unsigned long table_data_size) -{ - unsigned long table_count = 1; - unsigned long entries_count = 0; - - dev_dbg(&sep->pdev->dev, "sep_debug_print_lli_tables start\n"); - - while ((unsigned long) lli_table_ptr->bus_address != 0xffffffff) { - dev_dbg(&sep->pdev->dev, - "lli table %08lx, table_data_size is %lu\n", - table_count, table_data_size); - dev_dbg(&sep->pdev->dev, "num_table_entries is %lu\n", - num_table_entries); - - /* Print entries of the table (without info entry) */ - for (entries_count = 0; entries_count < num_table_entries; - entries_count++, lli_table_ptr++) { - - dev_dbg(&sep->pdev->dev, - "lli_table_ptr address is %08lx\n", - (unsigned long) lli_table_ptr); - - dev_dbg(&sep->pdev->dev, - "phys address is %08lx block size is %x\n", - (unsigned long)lli_table_ptr->bus_address, - lli_table_ptr->block_size); - } - /* Point to the info entry */ - lli_table_ptr--; - - dev_dbg(&sep->pdev->dev, - "phys lli_table_ptr->block_size is %x\n", - lli_table_ptr->block_size); - - dev_dbg(&sep->pdev->dev, - "phys lli_table_ptr->physical_address is %08lu\n", - (unsigned long)lli_table_ptr->bus_address); - - - table_data_size = lli_table_ptr->block_size & 0xffffff; - num_table_entries = (lli_table_ptr->block_size >> 24) & 0xff; - - dev_dbg(&sep->pdev->dev, - "phys table_data_size is %lu num_table_entries is" - " %lu bus_address is%lu\n", table_data_size, - num_table_entries, (unsigned long)lli_table_ptr->bus_address); - - if ((unsigned long)lli_table_ptr->bus_address != 0xffffffff) - lli_table_ptr = (struct sep_lli_entry *) - sep_shared_bus_to_virt(sep, - (unsigned long)lli_table_ptr->bus_address); - - table_count++; - } - dev_dbg(&sep->pdev->dev, "sep_debug_print_lli_tables end\n"); -} - - -/** - * sep_prepare_empty_lli_table - create a blank LLI table - * @sep: pointer to struct sep_device - * @lli_table_addr_ptr: pointer to lli table - * @num_entries_ptr: pointer to number of entries - * @table_data_size_ptr: point to table data size - * - * This function creates empty lli tables when there is no data - */ -static void sep_prepare_empty_lli_table(struct sep_device *sep, - dma_addr_t *lli_table_addr_ptr, - u32 *num_entries_ptr, - u32 *table_data_size_ptr) -{ - struct sep_lli_entry *lli_table_ptr; - - /* Find the area for new table */ - lli_table_ptr = - (struct sep_lli_entry *)(sep->shared_addr + - SYNCHRONIC_DMA_TABLES_AREA_OFFSET_BYTES + - sep->num_lli_tables_created * sizeof(struct sep_lli_entry) * - SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP); - - lli_table_ptr->bus_address = 0; - lli_table_ptr->block_size = 0; - - lli_table_ptr++; - lli_table_ptr->bus_address = 0xFFFFFFFF; - lli_table_ptr->block_size = 0; - - /* Set the output parameter value */ - *lli_table_addr_ptr = sep->shared_bus + - SYNCHRONIC_DMA_TABLES_AREA_OFFSET_BYTES + - sep->num_lli_tables_created * - sizeof(struct sep_lli_entry) * - SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP; - - /* Set the num of entries and table data size for empty table */ - *num_entries_ptr = 2; - *table_data_size_ptr = 0; - - /* Update the number of created tables */ - sep->num_lli_tables_created++; -} - -/** - * sep_prepare_input_dma_table - prepare input DMA mappings - * @sep: pointer to struct sep_device - * @data_size: - * @block_size: - * @lli_table_ptr: - * @num_entries_ptr: - * @table_data_size_ptr: - * @is_kva: set for kernel data (kernel cryptio call) - * - * This function prepares only input DMA table for synhronic symmetric - * operations (HASH) - * Note that all bus addresses that are passed to the SEP - * are in 32 bit format; the SEP is a 32 bit device - */ -static int sep_prepare_input_dma_table(struct sep_device *sep, - unsigned long app_virt_addr, - u32 data_size, - u32 block_size, - dma_addr_t *lli_table_ptr, - u32 *num_entries_ptr, - u32 *table_data_size_ptr, - bool is_kva) -{ - int error = 0; - /* Pointer to the info entry of the table - the last entry */ - struct sep_lli_entry *info_entry_ptr; - /* Array of pointers to page */ - struct sep_lli_entry *lli_array_ptr; - /* Points to the first entry to be processed in the lli_in_array */ - u32 current_entry = 0; - /* Num entries in the virtual buffer */ - u32 sep_lli_entries = 0; - /* Lli table pointer */ - struct sep_lli_entry *in_lli_table_ptr; - /* The total data in one table */ - u32 table_data_size = 0; - /* Flag for last table */ - u32 last_table_flag = 0; - /* Number of entries in lli table */ - u32 num_entries_in_table = 0; - /* Next table address */ - void *lli_table_alloc_addr = 0; - - dev_dbg(&sep->pdev->dev, "prepare intput dma table data_size is %x\n", data_size); - dev_dbg(&sep->pdev->dev, "block_size is %x\n", block_size); - - /* Initialize the pages pointers */ - sep->dma_res_arr[sep->nr_dcb_creat].in_page_array = NULL; - sep->dma_res_arr[sep->nr_dcb_creat].in_num_pages = 0; - - /* Set the kernel address for first table to be allocated */ - lli_table_alloc_addr = (void *)(sep->shared_addr + - SYNCHRONIC_DMA_TABLES_AREA_OFFSET_BYTES + - sep->num_lli_tables_created * sizeof(struct sep_lli_entry) * - SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP); - - if (data_size == 0) { - /* Special case - create meptu table - 2 entries, zero data */ - sep_prepare_empty_lli_table(sep, lli_table_ptr, - num_entries_ptr, table_data_size_ptr); - goto update_dcb_counter; - } - - /* Check if the pages are in Kernel Virtual Address layout */ - if (is_kva == true) - /* Lock the pages in the kernel */ - error = sep_lock_kernel_pages(sep, app_virt_addr, - data_size, &lli_array_ptr, SEP_DRIVER_IN_FLAG); - else - /* - * Lock the pages of the user buffer - * and translate them to pages - */ - error = sep_lock_user_pages(sep, app_virt_addr, - data_size, &lli_array_ptr, SEP_DRIVER_IN_FLAG); - - if (error) - goto end_function; - - dev_dbg(&sep->pdev->dev, "output sep_in_num_pages is %x\n", - sep->dma_res_arr[sep->nr_dcb_creat].in_num_pages); - - current_entry = 0; - info_entry_ptr = NULL; - - sep_lli_entries = sep->dma_res_arr[sep->nr_dcb_creat].in_num_pages; - - /* Loop till all the entries in in array are not processed */ - while (current_entry < sep_lli_entries) { - - /* Set the new input and output tables */ - in_lli_table_ptr = - (struct sep_lli_entry *)lli_table_alloc_addr; - - lli_table_alloc_addr += sizeof(struct sep_lli_entry) * - SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP; - - if (lli_table_alloc_addr > - ((void *)sep->shared_addr + - SYNCHRONIC_DMA_TABLES_AREA_OFFSET_BYTES + - SYNCHRONIC_DMA_TABLES_AREA_SIZE_BYTES)) { - - error = -ENOMEM; - goto end_function_error; - - } - - /* Update the number of created tables */ - sep->num_lli_tables_created++; - - /* Calculate the maximum size of data for input table */ - table_data_size = sep_calculate_lli_table_max_size(sep, - &lli_array_ptr[current_entry], - (sep_lli_entries - current_entry), - &last_table_flag); - - /* - * If this is not the last table - - * then align it to the block size - */ - if (!last_table_flag) - table_data_size = - (table_data_size / block_size) * block_size; - - dev_dbg(&sep->pdev->dev, "output table_data_size is %x\n", - table_data_size); - - /* Construct input lli table */ - sep_build_lli_table(sep, &lli_array_ptr[current_entry], - in_lli_table_ptr, - ¤t_entry, &num_entries_in_table, table_data_size); - - if (info_entry_ptr == NULL) { - - /* Set the output parameters to physical addresses */ - *lli_table_ptr = sep_shared_area_virt_to_bus(sep, - in_lli_table_ptr); - *num_entries_ptr = num_entries_in_table; - *table_data_size_ptr = table_data_size; - - dev_dbg(&sep->pdev->dev, - "output lli_table_in_ptr is %08lx\n", - (unsigned long)*lli_table_ptr); - - } else { - /* Update the info entry of the previous in table */ - info_entry_ptr->bus_address = - sep_shared_area_virt_to_bus(sep, - in_lli_table_ptr); - info_entry_ptr->block_size = - ((num_entries_in_table) << 24) | - (table_data_size); - } - /* Save the pointer to the info entry of the current tables */ - info_entry_ptr = in_lli_table_ptr + num_entries_in_table - 1; - } - /* Print input tables */ - sep_debug_print_lli_tables(sep, (struct sep_lli_entry *) - sep_shared_area_bus_to_virt(sep, *lli_table_ptr), - *num_entries_ptr, *table_data_size_ptr); - /* The array of the pages */ - kfree(lli_array_ptr); - -update_dcb_counter: - /* Update DCB counter */ - sep->nr_dcb_creat++; - goto end_function; - -end_function_error: - /* Free all the allocated resources */ - kfree(sep->dma_res_arr[sep->nr_dcb_creat].in_map_array); - kfree(lli_array_ptr); - kfree(sep->dma_res_arr[sep->nr_dcb_creat].in_page_array); - -end_function: - return error; - -} -/** - * sep_construct_dma_tables_from_lli - prepare AES/DES mappings - * @sep: pointer to struct sep_device - * @lli_in_array: - * @sep_in_lli_entries: - * @lli_out_array: - * @sep_out_lli_entries - * @block_size - * @lli_table_in_ptr - * @lli_table_out_ptr - * @in_num_entries_ptr - * @out_num_entries_ptr - * @table_data_size_ptr - * - * This function creates the input and output DMA tables for - * symmetric operations (AES/DES) according to the block - * size from LLI arays - * Note that all bus addresses that are passed to the SEP - * are in 32 bit format; the SEP is a 32 bit device - */ -static int sep_construct_dma_tables_from_lli( - struct sep_device *sep, - struct sep_lli_entry *lli_in_array, - u32 sep_in_lli_entries, - struct sep_lli_entry *lli_out_array, - u32 sep_out_lli_entries, - u32 block_size, - dma_addr_t *lli_table_in_ptr, - dma_addr_t *lli_table_out_ptr, - u32 *in_num_entries_ptr, - u32 *out_num_entries_ptr, - u32 *table_data_size_ptr) -{ - /* Points to the area where next lli table can be allocated */ - void *lli_table_alloc_addr = 0; - /* Input lli table */ - struct sep_lli_entry *in_lli_table_ptr = NULL; - /* Output lli table */ - struct sep_lli_entry *out_lli_table_ptr = NULL; - /* Pointer to the info entry of the table - the last entry */ - struct sep_lli_entry *info_in_entry_ptr = NULL; - /* Pointer to the info entry of the table - the last entry */ - struct sep_lli_entry *info_out_entry_ptr = NULL; - /* Points to the first entry to be processed in the lli_in_array */ - u32 current_in_entry = 0; - /* Points to the first entry to be processed in the lli_out_array */ - u32 current_out_entry = 0; - /* Max size of the input table */ - u32 in_table_data_size = 0; - /* Max size of the output table */ - u32 out_table_data_size = 0; - /* Flag te signifies if this is the last tables build */ - u32 last_table_flag = 0; - /* The data size that should be in table */ - u32 table_data_size = 0; - /* Number of etnries in the input table */ - u32 num_entries_in_table = 0; - /* Number of etnries in the output table */ - u32 num_entries_out_table = 0; - - /* Initiate to point after the message area */ - lli_table_alloc_addr = (void *)(sep->shared_addr + - SYNCHRONIC_DMA_TABLES_AREA_OFFSET_BYTES + - (sep->num_lli_tables_created * - (sizeof(struct sep_lli_entry) * - SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP))); - - /* Loop till all the entries in in array are not processed */ - while (current_in_entry < sep_in_lli_entries) { - /* Set the new input and output tables */ - in_lli_table_ptr = - (struct sep_lli_entry *)lli_table_alloc_addr; - - lli_table_alloc_addr += sizeof(struct sep_lli_entry) * - SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP; - - /* Set the first output tables */ - out_lli_table_ptr = - (struct sep_lli_entry *)lli_table_alloc_addr; - - /* Check if the DMA table area limit was overrun */ - if ((lli_table_alloc_addr + sizeof(struct sep_lli_entry) * - SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP) > - ((void *)sep->shared_addr + - SYNCHRONIC_DMA_TABLES_AREA_OFFSET_BYTES + - SYNCHRONIC_DMA_TABLES_AREA_SIZE_BYTES)) { - - dev_warn(&sep->pdev->dev, "dma table limit overrun\n"); - return -ENOMEM; - } - - /* Update the number of the lli tables created */ - sep->num_lli_tables_created += 2; - - lli_table_alloc_addr += sizeof(struct sep_lli_entry) * - SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP; - - /* Calculate the maximum size of data for input table */ - in_table_data_size = - sep_calculate_lli_table_max_size(sep, - &lli_in_array[current_in_entry], - (sep_in_lli_entries - current_in_entry), - &last_table_flag); - - /* Calculate the maximum size of data for output table */ - out_table_data_size = - sep_calculate_lli_table_max_size(sep, - &lli_out_array[current_out_entry], - (sep_out_lli_entries - current_out_entry), - &last_table_flag); - - dev_dbg(&sep->pdev->dev, - "construct tables from lli in_table_data_size is %x\n", - in_table_data_size); - - dev_dbg(&sep->pdev->dev, - "construct tables from lli out_table_data_size is %x\n", - out_table_data_size); - - table_data_size = in_table_data_size; - - if (!last_table_flag) { - /* - * If this is not the last table, - * then must check where the data is smallest - * and then align it to the block size - */ - if (table_data_size > out_table_data_size) - table_data_size = out_table_data_size; - - /* - * Now calculate the table size so that - * it will be module block size - */ - table_data_size = (table_data_size / block_size) * - block_size; - } - - /* Construct input lli table */ - sep_build_lli_table(sep, &lli_in_array[current_in_entry], - in_lli_table_ptr, - ¤t_in_entry, - &num_entries_in_table, - table_data_size); - - /* Construct output lli table */ - sep_build_lli_table(sep, &lli_out_array[current_out_entry], - out_lli_table_ptr, - ¤t_out_entry, - &num_entries_out_table, - table_data_size); - - /* If info entry is null - this is the first table built */ - if (info_in_entry_ptr == NULL) { - /* Set the output parameters to physical addresses */ - *lli_table_in_ptr = - sep_shared_area_virt_to_bus(sep, in_lli_table_ptr); - - *in_num_entries_ptr = num_entries_in_table; - - *lli_table_out_ptr = - sep_shared_area_virt_to_bus(sep, - out_lli_table_ptr); - - *out_num_entries_ptr = num_entries_out_table; - *table_data_size_ptr = table_data_size; - - dev_dbg(&sep->pdev->dev, - "output lli_table_in_ptr is %08lx\n", - (unsigned long)*lli_table_in_ptr); - dev_dbg(&sep->pdev->dev, - "output lli_table_out_ptr is %08lx\n", - (unsigned long)*lli_table_out_ptr); - } else { - /* Update the info entry of the previous in table */ - info_in_entry_ptr->bus_address = - sep_shared_area_virt_to_bus(sep, - in_lli_table_ptr); - - info_in_entry_ptr->block_size = - ((num_entries_in_table) << 24) | - (table_data_size); - - /* Update the info entry of the previous in table */ - info_out_entry_ptr->bus_address = - sep_shared_area_virt_to_bus(sep, - out_lli_table_ptr); - - info_out_entry_ptr->block_size = - ((num_entries_out_table) << 24) | - (table_data_size); - - dev_dbg(&sep->pdev->dev, - "output lli_table_in_ptr:%08lx %08x\n", - (unsigned long)info_in_entry_ptr->bus_address, - info_in_entry_ptr->block_size); - - dev_dbg(&sep->pdev->dev, - "output lli_table_out_ptr:%08lx %08x\n", - (unsigned long)info_out_entry_ptr->bus_address, - info_out_entry_ptr->block_size); - } - - /* Save the pointer to the info entry of the current tables */ - info_in_entry_ptr = in_lli_table_ptr + - num_entries_in_table - 1; - info_out_entry_ptr = out_lli_table_ptr + - num_entries_out_table - 1; - - dev_dbg(&sep->pdev->dev, - "output num_entries_out_table is %x\n", - (u32)num_entries_out_table); - dev_dbg(&sep->pdev->dev, - "output info_in_entry_ptr is %lx\n", - (unsigned long)info_in_entry_ptr); - dev_dbg(&sep->pdev->dev, - "output info_out_entry_ptr is %lx\n", - (unsigned long)info_out_entry_ptr); - } - - /* Print input tables */ - sep_debug_print_lli_tables(sep, - (struct sep_lli_entry *) - sep_shared_area_bus_to_virt(sep, *lli_table_in_ptr), - *in_num_entries_ptr, - *table_data_size_ptr); - - /* Print output tables */ - sep_debug_print_lli_tables(sep, - (struct sep_lli_entry *) - sep_shared_area_bus_to_virt(sep, *lli_table_out_ptr), - *out_num_entries_ptr, - *table_data_size_ptr); - - return 0; -} - -/** - * sep_prepare_input_output_dma_table - prepare DMA I/O table - * @app_virt_in_addr: - * @app_virt_out_addr: - * @data_size: - * @block_size: - * @lli_table_in_ptr: - * @lli_table_out_ptr: - * @in_num_entries_ptr: - * @out_num_entries_ptr: - * @table_data_size_ptr: - * @is_kva: set for kernel data; used only for kernel crypto module - * - * This function builds input and output DMA tables for synhronic - * symmetric operations (AES, DES, HASH). It also checks that each table - * is of the modular block size - * Note that all bus addresses that are passed to the SEP - * are in 32 bit format; the SEP is a 32 bit device - */ -static int sep_prepare_input_output_dma_table(struct sep_device *sep, - unsigned long app_virt_in_addr, - unsigned long app_virt_out_addr, - u32 data_size, - u32 block_size, - dma_addr_t *lli_table_in_ptr, - dma_addr_t *lli_table_out_ptr, - u32 *in_num_entries_ptr, - u32 *out_num_entries_ptr, - u32 *table_data_size_ptr, - bool is_kva) - -{ - int error = 0; - /* Array of pointers of page */ - struct sep_lli_entry *lli_in_array; - /* Array of pointers of page */ - struct sep_lli_entry *lli_out_array; - - if (data_size == 0) { - /* Prepare empty table for input and output */ - sep_prepare_empty_lli_table(sep, lli_table_in_ptr, - in_num_entries_ptr, table_data_size_ptr); - - sep_prepare_empty_lli_table(sep, lli_table_out_ptr, - out_num_entries_ptr, table_data_size_ptr); - - goto update_dcb_counter; - } - - /* Initialize the pages pointers */ - sep->dma_res_arr[sep->nr_dcb_creat].in_page_array = NULL; - sep->dma_res_arr[sep->nr_dcb_creat].out_page_array = NULL; - - /* Lock the pages of the buffer and translate them to pages */ - if (is_kva == true) { - error = sep_lock_kernel_pages(sep, app_virt_in_addr, - data_size, &lli_in_array, SEP_DRIVER_IN_FLAG); - - if (error) { - dev_warn(&sep->pdev->dev, - "lock kernel for in failed\n"); - goto end_function; - } - - error = sep_lock_kernel_pages(sep, app_virt_out_addr, - data_size, &lli_out_array, SEP_DRIVER_OUT_FLAG); - - if (error) { - dev_warn(&sep->pdev->dev, - "lock kernel for out failed\n"); - goto end_function; - } - } - - else { - error = sep_lock_user_pages(sep, app_virt_in_addr, - data_size, &lli_in_array, SEP_DRIVER_IN_FLAG); - if (error) { - dev_warn(&sep->pdev->dev, - "sep_lock_user_pages for input virtual buffer failed\n"); - goto end_function; - } - - error = sep_lock_user_pages(sep, app_virt_out_addr, - data_size, &lli_out_array, SEP_DRIVER_OUT_FLAG); - - if (error) { - dev_warn(&sep->pdev->dev, - "sep_lock_user_pages for output virtual buffer failed\n"); - goto end_function_free_lli_in; - } - } - - dev_dbg(&sep->pdev->dev, "prep input output dma table sep_in_num_pages is %x\n", - sep->dma_res_arr[sep->nr_dcb_creat].in_num_pages); - dev_dbg(&sep->pdev->dev, "sep_out_num_pages is %x\n", - sep->dma_res_arr[sep->nr_dcb_creat].out_num_pages); - dev_dbg(&sep->pdev->dev, "SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP is %x\n", - SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP); - - /* Call the function that creates table from the lli arrays */ - error = sep_construct_dma_tables_from_lli(sep, lli_in_array, - sep->dma_res_arr[sep->nr_dcb_creat].in_num_pages, - lli_out_array, - sep->dma_res_arr[sep->nr_dcb_creat].out_num_pages, - block_size, lli_table_in_ptr, lli_table_out_ptr, - in_num_entries_ptr, out_num_entries_ptr, table_data_size_ptr); - - if (error) { - dev_warn(&sep->pdev->dev, - "sep_construct_dma_tables_from_lli failed\n"); - goto end_function_with_error; - } - - kfree(lli_out_array); - kfree(lli_in_array); - -update_dcb_counter: - /* Update DCB counter */ - sep->nr_dcb_creat++; - - goto end_function; - -end_function_with_error: - kfree(sep->dma_res_arr[sep->nr_dcb_creat].out_map_array); - kfree(sep->dma_res_arr[sep->nr_dcb_creat].out_page_array); - kfree(lli_out_array); - - -end_function_free_lli_in: - kfree(sep->dma_res_arr[sep->nr_dcb_creat].in_map_array); - kfree(sep->dma_res_arr[sep->nr_dcb_creat].in_page_array); - kfree(lli_in_array); - -end_function: - - return error; - -} - -/** - * sep_prepare_input_output_dma_table_in_dcb - prepare control blocks - * @app_in_address: unsigned long; for data buffer in (user space) - * @app_out_address: unsigned long; for data buffer out (user space) - * @data_in_size: u32; for size of data - * @block_size: u32; for block size - * @tail_block_size: u32; for size of tail block - * @isapplet: bool; to indicate external app - * @is_kva: bool; kernel buffer; only used for kernel crypto module - * - * This function prepares the linked DMA tables and puts the - * address for the linked list of tables inta a DCB (data control - * block) the address of which is known by the SEP hardware - * Note that all bus addresses that are passed to the SEP - * are in 32 bit format; the SEP is a 32 bit device - */ -static int sep_prepare_input_output_dma_table_in_dcb(struct sep_device *sep, - unsigned long app_in_address, - unsigned long app_out_address, - u32 data_in_size, - u32 block_size, - u32 tail_block_size, - bool isapplet, - bool is_kva) -{ - int error = 0; - /* Size of tail */ - u32 tail_size = 0; - /* Address of the created DCB table */ - struct sep_dcblock *dcb_table_ptr = NULL; - /* The physical address of the first input DMA table */ - dma_addr_t in_first_mlli_address = 0; - /* Number of entries in the first input DMA table */ - u32 in_first_num_entries = 0; - /* The physical address of the first output DMA table */ - dma_addr_t out_first_mlli_address = 0; - /* Number of entries in the first output DMA table */ - u32 out_first_num_entries = 0; - /* Data in the first input/output table */ - u32 first_data_size = 0; - - if (sep->nr_dcb_creat == SEP_MAX_NUM_SYNC_DMA_OPS) { - /* No more DCBs to allocate */ - dev_warn(&sep->pdev->dev, "no more DCBs available\n"); - error = -ENOSPC; - goto end_function; - } - - /* Allocate new DCB */ - dcb_table_ptr = (struct sep_dcblock *)(sep->shared_addr + - SEP_DRIVER_SYSTEM_DCB_MEMORY_OFFSET_IN_BYTES + - (sep->nr_dcb_creat * sizeof(struct sep_dcblock))); - - /* Set the default values in the DCB */ - dcb_table_ptr->input_mlli_address = 0; - dcb_table_ptr->input_mlli_num_entries = 0; - dcb_table_ptr->input_mlli_data_size = 0; - dcb_table_ptr->output_mlli_address = 0; - dcb_table_ptr->output_mlli_num_entries = 0; - dcb_table_ptr->output_mlli_data_size = 0; - dcb_table_ptr->tail_data_size = 0; - dcb_table_ptr->out_vr_tail_pt = 0; - - if (isapplet == true) { - - /* Check if there is enough data for DMA operation */ - if (data_in_size < SEP_DRIVER_MIN_DATA_SIZE_PER_TABLE) { - if (is_kva == true) { - memcpy(dcb_table_ptr->tail_data, - (void *)app_in_address, data_in_size); - } else { - if (copy_from_user(dcb_table_ptr->tail_data, - (void __user *)app_in_address, - data_in_size)) { - error = -EFAULT; - goto end_function; - } - } - - dcb_table_ptr->tail_data_size = data_in_size; - - /* Set the output user-space address for mem2mem op */ - if (app_out_address) - dcb_table_ptr->out_vr_tail_pt = - (aligned_u64)app_out_address; - - /* - * Update both data length parameters in order to avoid - * second data copy and allow building of empty mlli - * tables - */ - tail_size = 0x0; - data_in_size = 0x0; - - } else { - if (!app_out_address) { - tail_size = data_in_size % block_size; - if (!tail_size) { - if (tail_block_size == block_size) - tail_size = block_size; - } - } else { - tail_size = 0; - } - } - if (tail_size) { - if (tail_size > sizeof(dcb_table_ptr->tail_data)) - return -EINVAL; - if (is_kva == true) { - memcpy(dcb_table_ptr->tail_data, - (void *)(app_in_address + data_in_size - - tail_size), tail_size); - } else { - /* We have tail data - copy it to DCB */ - if (copy_from_user(dcb_table_ptr->tail_data, - (void *)(app_in_address + - data_in_size - tail_size), tail_size)) { - error = -EFAULT; - goto end_function; - } - } - if (app_out_address) - /* - * Calculate the output address - * according to tail data size - */ - dcb_table_ptr->out_vr_tail_pt = - (aligned_u64)app_out_address + data_in_size - - tail_size; - - /* Save the real tail data size */ - dcb_table_ptr->tail_data_size = tail_size; - /* - * Update the data size without the tail - * data size AKA data for the dma - */ - data_in_size = (data_in_size - tail_size); - } - } - /* Check if we need to build only input table or input/output */ - if (app_out_address) { - /* Prepare input/output tables */ - error = sep_prepare_input_output_dma_table(sep, - app_in_address, - app_out_address, - data_in_size, - block_size, - &in_first_mlli_address, - &out_first_mlli_address, - &in_first_num_entries, - &out_first_num_entries, - &first_data_size, - is_kva); - } else { - /* Prepare input tables */ - error = sep_prepare_input_dma_table(sep, - app_in_address, - data_in_size, - block_size, - &in_first_mlli_address, - &in_first_num_entries, - &first_data_size, - is_kva); - } - - if (error) { - dev_warn(&sep->pdev->dev, "prepare DMA table call failed from prepare DCB call\n"); - goto end_function; - } - - /* Set the DCB values */ - dcb_table_ptr->input_mlli_address = in_first_mlli_address; - dcb_table_ptr->input_mlli_num_entries = in_first_num_entries; - dcb_table_ptr->input_mlli_data_size = first_data_size; - dcb_table_ptr->output_mlli_address = out_first_mlli_address; - dcb_table_ptr->output_mlli_num_entries = out_first_num_entries; - dcb_table_ptr->output_mlli_data_size = first_data_size; - -end_function: - return error; - -} - -/** - * sep_free_dma_tables_and_dcb - free DMA tables and DCBs - * @sep: pointer to struct sep_device - * @isapplet: indicates external application (used for kernel access) - * @is_kva: indicates kernel addresses (only used for kernel crypto) - * - * This function frees the DMA tables and DCB - */ -static int sep_free_dma_tables_and_dcb(struct sep_device *sep, bool isapplet, - bool is_kva) -{ - int i = 0; - int error = 0; - int error_temp = 0; - struct sep_dcblock *dcb_table_ptr; - unsigned long pt_hold; - void *tail_pt; - - if (isapplet == true) { - /* Set pointer to first DCB table */ - dcb_table_ptr = (struct sep_dcblock *) - (sep->shared_addr + - SEP_DRIVER_SYSTEM_DCB_MEMORY_OFFSET_IN_BYTES); - - /* Go over each DCB and see if tail pointer must be updated */ - for (i = 0; i < sep->nr_dcb_creat; i++, dcb_table_ptr++) { - if (dcb_table_ptr->out_vr_tail_pt) { - pt_hold = (unsigned long)dcb_table_ptr->out_vr_tail_pt; - tail_pt = (void *)pt_hold; - if (is_kva == true) { - memcpy(tail_pt, - dcb_table_ptr->tail_data, - dcb_table_ptr->tail_data_size); - } else { - error_temp = copy_to_user( - tail_pt, - dcb_table_ptr->tail_data, - dcb_table_ptr->tail_data_size); - } - if (error_temp) { - /* Release the DMA resource */ - error = -EFAULT; - break; - } - } - } - } - /* Free the output pages, if any */ - sep_free_dma_table_data_handler(sep); - - return error; -} - -/** - * sep_get_static_pool_addr_handler - get static pool address - * @sep: pointer to struct sep_device - * - * This function sets the bus and virtual addresses of the static pool - */ -static int sep_get_static_pool_addr_handler(struct sep_device *sep) -{ - u32 *static_pool_addr = NULL; - - static_pool_addr = (u32 *)(sep->shared_addr + - SEP_DRIVER_SYSTEM_RAR_MEMORY_OFFSET_IN_BYTES); - - static_pool_addr[0] = SEP_STATIC_POOL_VAL_TOKEN; - static_pool_addr[1] = (u32)sep->shared_bus + - SEP_DRIVER_STATIC_AREA_OFFSET_IN_BYTES; - - dev_dbg(&sep->pdev->dev, "static pool segment: physical %x\n", - (u32)static_pool_addr[1]); - - return 0; -} - -/** - * sep_end_transaction_handler - end transaction - * @sep: pointer to struct sep_device - * - * This API handles the end transaction request - */ -static int sep_end_transaction_handler(struct sep_device *sep) -{ - /* Clear the data pool pointers Token */ - memset((void *)(sep->shared_addr + - SEP_DRIVER_DATA_POOL_ALLOCATION_OFFSET_IN_BYTES), - 0, sep->num_of_data_allocations*2*sizeof(u32)); - - /* Check that all the DMA resources were freed */ - sep_free_dma_table_data_handler(sep); - - clear_bit(SEP_MMAP_LOCK_BIT, &sep->in_use_flags); - - /* - * We are now through with the transaction. Let's - * allow other processes who have the device open - * to perform transactions - */ - mutex_lock(&sep->sep_mutex); - sep->pid_doing_transaction = 0; - mutex_unlock(&sep->sep_mutex); - /* Raise event for stuck contextes */ - wake_up(&sep->event); - - return 0; -} - -/** - * sep_prepare_dcb_handler - prepare a control block - * @sep: pointer to struct sep_device - * @arg: pointer to user parameters - * - * This function will retrieve the RAR buffer physical addresses, type - * & size corresponding to the RAR handles provided in the buffers vector. - */ -static int sep_prepare_dcb_handler(struct sep_device *sep, unsigned long arg) -{ - int error; - /* Command arguments */ - struct build_dcb_struct command_args; - - /* Get the command arguments */ - if (copy_from_user(&command_args, (void __user *)arg, - sizeof(struct build_dcb_struct))) { - error = -EFAULT; - goto end_function; - } - - dev_dbg(&sep->pdev->dev, "prep dcb handler app_in_address is %08llx\n", - command_args.app_in_address); - dev_dbg(&sep->pdev->dev, "app_out_address is %08llx\n", - command_args.app_out_address); - dev_dbg(&sep->pdev->dev, "data_size is %x\n", - command_args.data_in_size); - dev_dbg(&sep->pdev->dev, "block_size is %x\n", - command_args.block_size); - dev_dbg(&sep->pdev->dev, "tail block_size is %x\n", - command_args.tail_block_size); - - error = sep_prepare_input_output_dma_table_in_dcb(sep, - (unsigned long)command_args.app_in_address, - (unsigned long)command_args.app_out_address, - command_args.data_in_size, command_args.block_size, - command_args.tail_block_size, true, false); - -end_function: - return error; - -} - -/** - * sep_free_dcb_handler - free control block resources - * @sep: pointer to struct sep_device - * - * This function frees the DCB resources and updates the needed - * user-space buffers. - */ -static int sep_free_dcb_handler(struct sep_device *sep) -{ - return sep_free_dma_tables_and_dcb(sep, false, false); -} - -/** - * sep_rar_prepare_output_msg_handler - prepare an output message - * @sep: pointer to struct sep_device - * @arg: pointer to user parameters - * - * This function will retrieve the RAR buffer physical addresses, type - * & size corresponding to the RAR handles provided in the buffers vector. - */ -static int sep_rar_prepare_output_msg_handler(struct sep_device *sep, - unsigned long arg) -{ - int error = 0; - /* Command args */ - struct rar_hndl_to_bus_struct command_args; - /* Bus address */ - dma_addr_t rar_bus = 0; - /* Holds the RAR address in the system memory offset */ - u32 *rar_addr; - - /* Copy the data */ - if (copy_from_user(&command_args, (void __user *)arg, - sizeof(command_args))) { - error = -EFAULT; - goto end_function; - } - - /* Call to translation function only if user handle is not NULL */ - if (command_args.rar_handle) - return -EOPNOTSUPP; - dev_dbg(&sep->pdev->dev, "rar msg; rar_addr_bus = %x\n", (u32)rar_bus); - - /* Set value in the SYSTEM MEMORY offset */ - rar_addr = (u32 *)(sep->shared_addr + - SEP_DRIVER_SYSTEM_RAR_MEMORY_OFFSET_IN_BYTES); - - /* Copy the physical address to the System Area for the SEP */ - rar_addr[0] = SEP_RAR_VAL_TOKEN; - rar_addr[1] = rar_bus; - -end_function: - return error; -} - -/** - * sep_ioctl - ioctl api - * @filp: pointer to struct file - * @cmd: command - * @arg: pointer to argument structure - * - * Implement the ioctl methods available on the SEP device. - */ -static long sep_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) -{ - int error = 0; - struct sep_device *sep = filp->private_data; - - /* Make sure we own this device */ - mutex_lock(&sep->sep_mutex); - if ((current->pid != sep->pid_doing_transaction) && - (sep->pid_doing_transaction != 0)) { - dev_dbg(&sep->pdev->dev, "ioctl pid is not owner\n"); - error = -EACCES; - } - mutex_unlock(&sep->sep_mutex); - - if (error) - return error; - - if (_IOC_TYPE(cmd) != SEP_IOC_MAGIC_NUMBER) - return -ENOTTY; - - /* Lock to prevent the daemon to interfere with operation */ - mutex_lock(&sep->ioctl_mutex); - - switch (cmd) { - case SEP_IOCSENDSEPCOMMAND: - /* Send command to SEP */ - error = sep_send_command_handler(sep); - break; - case SEP_IOCALLOCDATAPOLL: - /* Allocate data pool */ - error = sep_allocate_data_pool_memory_handler(sep, arg); - break; - case SEP_IOCGETSTATICPOOLADDR: - /* Inform the SEP the bus address of the static pool */ - error = sep_get_static_pool_addr_handler(sep); - break; - case SEP_IOCENDTRANSACTION: - error = sep_end_transaction_handler(sep); - break; - case SEP_IOCRARPREPAREMESSAGE: - error = sep_rar_prepare_output_msg_handler(sep, arg); - break; - case SEP_IOCPREPAREDCB: - error = sep_prepare_dcb_handler(sep, arg); - break; - case SEP_IOCFREEDCB: - error = sep_free_dcb_handler(sep); - break; - default: - error = -ENOTTY; - break; - } - - mutex_unlock(&sep->ioctl_mutex); - return error; -} - -/** - * sep_singleton_ioctl - ioctl api for singleton interface - * @filp: pointer to struct file - * @cmd: command - * @arg: pointer to argument structure - * - * Implement the additional ioctls for the singleton device - */ -static long sep_singleton_ioctl(struct file *filp, u32 cmd, unsigned long arg) -{ - long error = 0; - struct sep_device *sep = filp->private_data; - - /* Check that the command is for the SEP device */ - if (_IOC_TYPE(cmd) != SEP_IOC_MAGIC_NUMBER) - return -ENOTTY; - - /* Make sure we own this device */ - mutex_lock(&sep->sep_mutex); - if ((current->pid != sep->pid_doing_transaction) && - (sep->pid_doing_transaction != 0)) { - dev_dbg(&sep->pdev->dev, "singleton ioctl pid is not owner\n"); - mutex_unlock(&sep->sep_mutex); - return -EACCES; - } - - mutex_unlock(&sep->sep_mutex); - - switch (cmd) { - case SEP_IOCTLSETCALLERID: - mutex_lock(&sep->ioctl_mutex); - error = sep_set_caller_id_handler(sep, arg); - mutex_unlock(&sep->ioctl_mutex); - break; - default: - error = sep_ioctl(filp, cmd, arg); - break; - } - return error; -} - -/** - * sep_request_daemon_ioctl - ioctl for daemon - * @filp: pointer to struct file - * @cmd: command - * @arg: pointer to argument structure - * - * Called by the request daemon to perform ioctls on the daemon device - */ -static long sep_request_daemon_ioctl(struct file *filp, u32 cmd, - unsigned long arg) -{ - - long error; - struct sep_device *sep = filp->private_data; - - /* Check that the command is for SEP device */ - if (_IOC_TYPE(cmd) != SEP_IOC_MAGIC_NUMBER) - return -ENOTTY; - - /* Only one process can access ioctl at any given time */ - mutex_lock(&sep->ioctl_mutex); - - switch (cmd) { - case SEP_IOCSENDSEPRPLYCOMMAND: - /* Send reply command to SEP */ - error = sep_req_daemon_send_reply_command_handler(sep); - break; - case SEP_IOCENDTRANSACTION: - /* - * End req daemon transaction, do nothing - * will be removed upon update in middleware - * API library - */ - error = 0; - break; - default: - error = -ENOTTY; - } - mutex_unlock(&sep->ioctl_mutex); - return error; -} - -/** - * sep_inthandler - interrupt handler - * @irq: interrupt - * @dev_id: device id - */ -static irqreturn_t sep_inthandler(int irq, void *dev_id) -{ - irqreturn_t int_error = IRQ_HANDLED; - unsigned long lck_flags; - u32 reg_val, reg_val2 = 0; - struct sep_device *sep = dev_id; - - /* Read the IRR register to check if this is SEP interrupt */ - reg_val = sep_read_reg(sep, HW_HOST_IRR_REG_ADDR); - - if (reg_val & (0x1 << 13)) { - /* Lock and update the counter of reply messages */ - spin_lock_irqsave(&sep->snd_rply_lck, lck_flags); - sep->reply_ct++; - spin_unlock_irqrestore(&sep->snd_rply_lck, lck_flags); - - dev_dbg(&sep->pdev->dev, "sep int: send_ct %lx reply_ct %lx\n", - sep->send_ct, sep->reply_ct); - - /* Is this printf or daemon request? */ - reg_val2 = sep_read_reg(sep, HW_HOST_SEP_HOST_GPR2_REG_ADDR); - dev_dbg(&sep->pdev->dev, - "SEP Interrupt - reg2 is %08x\n", reg_val2); - - if ((reg_val2 >> 30) & 0x1) { - dev_dbg(&sep->pdev->dev, "int: printf request\n"); - wake_up(&sep->event_request_daemon); - } else if (reg_val2 >> 31) { - dev_dbg(&sep->pdev->dev, "int: daemon request\n"); - wake_up(&sep->event_request_daemon); - } else { - dev_dbg(&sep->pdev->dev, "int: SEP reply\n"); - wake_up(&sep->event); - } - } else { - dev_dbg(&sep->pdev->dev, "int: not SEP interrupt\n"); - int_error = IRQ_NONE; - } - if (int_error == IRQ_HANDLED) - sep_write_reg(sep, HW_HOST_ICR_REG_ADDR, reg_val); - - return int_error; -} - -/** - * sep_reconfig_shared_area - reconfigure shared area - * @sep: pointer to struct sep_device - * - * Reconfig the shared area between HOST and SEP - needed in case - * the DX_CC_Init function was called before OS loading. - */ -static int sep_reconfig_shared_area(struct sep_device *sep) -{ - int ret_val; - - /* use to limit waiting for SEP */ - unsigned long end_time; - - /* Send the new SHARED MESSAGE AREA to the SEP */ - dev_dbg(&sep->pdev->dev, "reconfig shared; sending %08llx to sep\n", - (unsigned long long)sep->shared_bus); - - sep_write_reg(sep, HW_HOST_HOST_SEP_GPR1_REG_ADDR, sep->shared_bus); - - /* Poll for SEP response */ - ret_val = sep_read_reg(sep, HW_HOST_SEP_HOST_GPR1_REG_ADDR); - - end_time = jiffies + (WAIT_TIME * HZ); - - while ((time_before(jiffies, end_time)) && (ret_val != 0xffffffff) && - (ret_val != sep->shared_bus)) - ret_val = sep_read_reg(sep, HW_HOST_SEP_HOST_GPR1_REG_ADDR); - - /* Check the return value (register) */ - if (ret_val != sep->shared_bus) { - dev_warn(&sep->pdev->dev, "could not reconfig shared area\n"); - dev_warn(&sep->pdev->dev, "result was %x\n", ret_val); - ret_val = -ENOMEM; - } else - ret_val = 0; - - dev_dbg(&sep->pdev->dev, "reconfig shared area end\n"); - return ret_val; -} - -/* File operation for singleton SEP operations */ -static const struct file_operations singleton_file_operations = { - .owner = THIS_MODULE, - .unlocked_ioctl = sep_singleton_ioctl, - .poll = sep_poll, - .open = sep_singleton_open, - .release = sep_singleton_release, - .mmap = sep_mmap, -}; - -/* File operation for daemon operations */ -static const struct file_operations daemon_file_operations = { - .owner = THIS_MODULE, - .unlocked_ioctl = sep_request_daemon_ioctl, - .poll = sep_request_daemon_poll, - .open = sep_request_daemon_open, - .release = sep_request_daemon_release, - .mmap = sep_request_daemon_mmap, -}; - -/* The files operations structure of the driver */ -static const struct file_operations sep_file_operations = { - .owner = THIS_MODULE, - .unlocked_ioctl = sep_ioctl, - .poll = sep_poll, - .open = sep_open, - .release = sep_release, - .mmap = sep_mmap, -}; - -/** - * sep_register_driver_with_fs - register misc devices - * @sep: pointer to struct sep_device - * - * This function registers the driver with the file system - */ -static int sep_register_driver_with_fs(struct sep_device *sep) -{ - int ret_val; - - sep->miscdev_sep.minor = MISC_DYNAMIC_MINOR; - sep->miscdev_sep.name = SEP_DEV_NAME; - sep->miscdev_sep.fops = &sep_file_operations; - - sep->miscdev_singleton.minor = MISC_DYNAMIC_MINOR; - sep->miscdev_singleton.name = SEP_DEV_SINGLETON; - sep->miscdev_singleton.fops = &singleton_file_operations; - - sep->miscdev_daemon.minor = MISC_DYNAMIC_MINOR; - sep->miscdev_daemon.name = SEP_DEV_DAEMON; - sep->miscdev_daemon.fops = &daemon_file_operations; - - ret_val = misc_register(&sep->miscdev_sep); - if (ret_val) { - dev_warn(&sep->pdev->dev, "misc reg fails for SEP %x\n", - ret_val); - return ret_val; - } - - ret_val = misc_register(&sep->miscdev_singleton); - if (ret_val) { - dev_warn(&sep->pdev->dev, "misc reg fails for sing %x\n", - ret_val); - misc_deregister(&sep->miscdev_sep); - return ret_val; - } - - ret_val = misc_register(&sep->miscdev_daemon); - if (ret_val) { - dev_warn(&sep->pdev->dev, "misc reg fails for dmn %x\n", - ret_val); - misc_deregister(&sep->miscdev_sep); - misc_deregister(&sep->miscdev_singleton); - - return ret_val; - } - return ret_val; -} - - -/** - * sep_probe - probe a matching PCI device - * @pdev: pci_device - * @end: pci_device_id - * - * Attempt to set up and configure a SEP device that has been - * discovered by the PCI layer. - */ -static int __devinit sep_probe(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - int error = 0; - struct sep_device *sep; - - if (sep_dev != NULL) { - dev_warn(&pdev->dev, "only one SEP supported.\n"); - return -EBUSY; - } - - /* Enable the device */ - error = pci_enable_device(pdev); - if (error) { - dev_warn(&pdev->dev, "error enabling pci device\n"); - goto end_function; - } - - /* Allocate the sep_device structure for this device */ - sep_dev = kzalloc(sizeof(struct sep_device), GFP_ATOMIC); - if (sep_dev == NULL) { - dev_warn(&pdev->dev, - "can't kmalloc the sep_device structure\n"); - error = -ENOMEM; - goto end_function_disable_device; - } - - /* - * We're going to use another variable for actually - * working with the device; this way, if we have - * multiple devices in the future, it would be easier - * to make appropriate changes - */ - sep = sep_dev; - - sep->pdev = pci_dev_get(pdev); - - init_waitqueue_head(&sep->event); - init_waitqueue_head(&sep->event_request_daemon); - spin_lock_init(&sep->snd_rply_lck); - mutex_init(&sep->sep_mutex); - mutex_init(&sep->ioctl_mutex); - - dev_dbg(&sep->pdev->dev, "sep probe: PCI obtained, device being prepared\n"); - dev_dbg(&sep->pdev->dev, "revision is %d\n", sep->pdev->revision); - - /* Set up our register area */ - sep->reg_physical_addr = pci_resource_start(sep->pdev, 0); - if (!sep->reg_physical_addr) { - dev_warn(&sep->pdev->dev, "Error getting register start\n"); - error = -ENODEV; - goto end_function_free_sep_dev; - } - - sep->reg_physical_end = pci_resource_end(sep->pdev, 0); - if (!sep->reg_physical_end) { - dev_warn(&sep->pdev->dev, "Error getting register end\n"); - error = -ENODEV; - goto end_function_free_sep_dev; - } - - sep->reg_addr = ioremap_nocache(sep->reg_physical_addr, - (size_t)(sep->reg_physical_end - sep->reg_physical_addr + 1)); - if (!sep->reg_addr) { - dev_warn(&sep->pdev->dev, "Error getting register virtual\n"); - error = -ENODEV; - goto end_function_free_sep_dev; - } - - dev_dbg(&sep->pdev->dev, - "Register area start %llx end %llx virtual %p\n", - (unsigned long long)sep->reg_physical_addr, - (unsigned long long)sep->reg_physical_end, - sep->reg_addr); - - /* Allocate the shared area */ - sep->shared_size = SEP_DRIVER_MESSAGE_SHARED_AREA_SIZE_IN_BYTES + - SYNCHRONIC_DMA_TABLES_AREA_SIZE_BYTES + - SEP_DRIVER_DATA_POOL_SHARED_AREA_SIZE_IN_BYTES + - SEP_DRIVER_STATIC_AREA_SIZE_IN_BYTES + - SEP_DRIVER_SYSTEM_DATA_MEMORY_SIZE_IN_BYTES; - - if (sep_map_and_alloc_shared_area(sep)) { - error = -ENOMEM; - /* Allocation failed */ - goto end_function_error; - } - - /* Clear ICR register */ - sep_write_reg(sep, HW_HOST_ICR_REG_ADDR, 0xFFFFFFFF); - - /* Set the IMR register - open only GPR 2 */ - sep_write_reg(sep, HW_HOST_IMR_REG_ADDR, (~(0x1 << 13))); - - /* Read send/receive counters from SEP */ - sep->reply_ct = sep_read_reg(sep, HW_HOST_SEP_HOST_GPR2_REG_ADDR); - sep->reply_ct &= 0x3FFFFFFF; - sep->send_ct = sep->reply_ct; - - /* Get the interrupt line */ - error = request_irq(pdev->irq, sep_inthandler, IRQF_SHARED, - "sep_driver", sep); - - if (error) - goto end_function_deallocate_sep_shared_area; - - /* The new chip requires a shared area reconfigure */ - if (sep->pdev->revision == 4) { /* Only for new chip */ - error = sep_reconfig_shared_area(sep); - if (error) - goto end_function_free_irq; - } - /* Finally magic up the device nodes */ - /* Register driver with the fs */ - error = sep_register_driver_with_fs(sep); - if (error == 0) - /* Success */ - return 0; - -end_function_free_irq: - free_irq(pdev->irq, sep); - -end_function_deallocate_sep_shared_area: - /* De-allocate shared area */ - sep_unmap_and_free_shared_area(sep); - -end_function_error: - iounmap(sep->reg_addr); - -end_function_free_sep_dev: - pci_dev_put(sep_dev->pdev); - kfree(sep_dev); - sep_dev = NULL; - -end_function_disable_device: - pci_disable_device(pdev); - -end_function: - return error; -} - -static void sep_remove(struct pci_dev *pdev) -{ - struct sep_device *sep = sep_dev; - - /* Unregister from fs */ - misc_deregister(&sep->miscdev_sep); - misc_deregister(&sep->miscdev_singleton); - misc_deregister(&sep->miscdev_daemon); - - /* Free the irq */ - free_irq(sep->pdev->irq, sep); - - /* Free the shared area */ - sep_unmap_and_free_shared_area(sep_dev); - iounmap((void *) sep_dev->reg_addr); -} - -static DEFINE_PCI_DEVICE_TABLE(sep_pci_id_tbl) = { - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MFLD_PCI_DEVICE_ID)}, - {0} -}; - -MODULE_DEVICE_TABLE(pci, sep_pci_id_tbl); - -/* Field for registering driver to PCI device */ -static struct pci_driver sep_pci_driver = { - .name = "sep_sec_driver", - .id_table = sep_pci_id_tbl, - .probe = sep_probe, - .remove = sep_remove -}; - - -/** - * sep_init - init function - * - * Module load time. Register the PCI device driver. - */ -static int __init sep_init(void) -{ - return pci_register_driver(&sep_pci_driver); -} - - -/** - * sep_exit - called to unload driver - * - * Drop the misc devices then remove and unmap the various resources - * that are not released by the driver remove method. - */ -static void __exit sep_exit(void) -{ - pci_unregister_driver(&sep_pci_driver); -} - - -module_init(sep_init); -module_exit(sep_exit); - -MODULE_LICENSE("GPL"); |