int error ;
unsigned int work1, work2, work3;
- /* set addresses and load resident */
+ /* Set addresses and load resident */
sep->resident_bus = sep->rar_bus;
sep->resident_addr = sep->rar_addr;
dev_dbg(&sep->pdev->dev, "resident size is %08x\n",
sep->resident_size);
- /* set addresses for dcache (no loading needed) */
+ /* Set addresses for dcache (no loading needed) */
work1 = (unsigned int)sep->resident_bus;
work2 = (unsigned int)sep->resident_size;
work3 = (work1 + work2 + (1024 * 4)) & 0xfffff000;
sep->dcache_size = 1024 * 128;
- /* set addresses and load cache */
+ /* Set addresses and load cache */
sep->cache_bus = sep->dcache_bus + sep->dcache_size;
sep->cache_addr = sep->dcache_addr + sep->dcache_size;
dev_dbg(&sep->pdev->dev, "cache size is %08x\n",
sep->cache_size);
- /* set addresses and load extapp */
+ /* Set addresses and load extapp */
sep->extapp_bus = sep->cache_bus + (1024 * 370);
sep->extapp_addr = sep->cache_addr + (1024 * 370);
/**
* sep_dump_message - dump the message that is pending
- * @sep: sep device
+ * @sep: SEP device
*/
static void sep_dump_message(struct sep_device *sep)
{
return -ENOMEM;
}
dev_dbg(&sep->pdev->dev,
- "sep: shared_addr %x bytes @%p (bus %llx)\n",
+ "shared_addr %x bytes @%p (bus %llx)\n",
sep->shared_size, sep->shared_addr,
(unsigned long long)sep->shared_bus);
return 0;
struct sep_device *sep;
/*
- * Get the sep device structure and use it for the
+ * Get the SEP device structure and use it for the
* private_data field in filp for other methods
*/
sep = sep_dev;
/**
* sep_open - device open method
- * @inode: inode of sep device
- * @filp: file handle to sep device
+ * @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.
struct sep_device *sep;
/*
- * Get the sep device structure and use it for the
+ * Get the SEP device structure and use it for the
* private_data field in filp for other methods
*/
sep = sep_dev;
/**
* sep_request_daemonopen - request daemon open method
- * @inode: inode of sep device
- * @filp: file handle to sep device
+ * @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.
dev_dbg(&sep->pdev->dev, "Reques daemon release for pid %d\n",
current->pid);
- /* clear the request_daemon_open flag */
+ /* Clear the request_daemon_open flag */
clear_bit(0, &sep->request_daemon_open);
return 0;
}
sep_dump_message(sep);
- /* counters are lockable region */
+ /* Counters are lockable region */
spin_lock_irqsave(&sep->snd_rply_lck, lck_flags);
sep->send_ct++;
sep->reply_ct++;
- /* send the interrupt to SEP */
+ /* Send the interrupt to SEP */
sep_write_reg(sep, HW_HOST_HOST_SEP_GPR2_REG_ADDR,
sep->send_ct);
* 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
+ * 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 */
+ /* Pointer to the current dma_resource struct */
struct sep_dma_resource *dma;
dev_dbg(&sep->pdev->dev, "sep_free_dma_table_data_handler start\n");
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 */
+ /* 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,
kfree(dma->in_map_array);
}
- /* unmap output map array, DON'T free it yet */
+ /* 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,
kfree(dma->out_map_array);
}
- /* free page cache for output */
+ /* 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]);
kfree(dma->out_page_array);
}
- /* reset all the values */
+ /* Reset all the values */
dma->in_page_array = 0;
dma->out_page_array = 0;
dma->in_num_pages = 0;
goto end_function;
}
- /* get physical address */
+ /* Get physical address */
bus_address = sep->shared_bus;
dev_dbg(&sep->pdev->dev, "bus_address is %08lx\n",
/**
* sep_request_daemon_poll - poll implementation
- * @sep: struct sep_device * for current sep device
+ * @sep: struct sep_device * for current SEP device
* @filp: struct file * for open file
* @wait: poll_table * for poll
*
sep->send_ct, sep->reply_ct);
spin_lock_irqsave(&sep->snd_rply_lck, lck_flags);
- /* check if the data is ready */
+ /* Check if the data is ready */
if (sep->send_ct == sep->reply_ct) {
spin_unlock_irqrestore(&sep->snd_rply_lck, lck_flags);
dev_dbg(&sep->pdev->dev,
"daemon poll: data check (GPR2) is %x\n", retval2);
- /* check if PRINT request */
+ /* 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 */
+ /* Check if NVS request */
if (retval2 >> 31) {
dev_dbg(&sep->pdev->dev, "daemon poll: NVS request in\n");
mask |= POLLPRI | POLLWRNORM;
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?
+ /* 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
* @filp: pointer to struct file
* @vma: pointer to vm_area_struct
*
- * Called on an mmap of our space via the normal sep device
+ * Called on an mmap of our space via the normal SEP device
*/
static int sep_mmap(struct file *filp, struct vm_area_struct *vma)
{
/*
* 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
+ * 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
sep->pid_doing_transaction = current->pid;
mutex_unlock(&sep->sep_mutex);
- /* zero the pools and the number of data pool alocation pointers */
+ /* 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
+ * 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) {
dev_dbg(&sep->pdev->dev, "shared_addr is %p\n", sep->shared_addr);
- /* get bus address */
+ /* Get bus address */
bus_addr = sep->shared_bus;
dev_dbg(&sep->pdev->dev,
goto end_function;
end_function_with_error:
- /* clear the bit */
+ /* 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 */
+ /* Raise event for stuck contextes */
dev_warn(&sep->pdev->dev, "mmap error - waking up event\n");
wake_up(&sep->event);
}
mutex_unlock(&sep->sep_mutex);
- /* check if send command or send_reply were activated previously */
+ /* Check if send command or send_reply were activated previously */
if (!test_bit(SEP_SEND_MSG_LOCK_BIT, &sep->in_use_flags)) {
dev_warn(&sep->pdev->dev, "poll; lock bit set\n");
mask = POLLERR;
goto end_function;
}
- /* add the event to the polling wait table */
+ /* 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 occured during poll */
+ /* Check if error occured 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);
dev_dbg(&sep->pdev->dev, "poll: data ready check (GPR2) %x\n",
retval);
- /* check if printf request */
+ /* Check if printf request */
if ((retval >> 30) & 0x1) {
- dev_dbg(&sep->pdev->dev, "poll: sep printf request\n");
+ 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 */
+ /* Check if the this is SEP reply or request */
if (retval >> 31) {
- dev_dbg(&sep->pdev->dev, "poll: sep request\n");
+ 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 */
+ /* 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");
-
+ "poll; SEP reply POLLIN | POLLRDNORM\n");
mask |= POLLIN | POLLRDNORM;
}
} else {
* @sep: the SEP we are setting the time for
*
* Calculates time and sets it at the predefined address.
- * Called with the sep mutex held.
+ * 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 */
+ u32 *time_addr; /* Address of time as seen by the kernel */
- dev_dbg(&sep->pdev->dev, "sep:sep_set_time start\n");
+ dev_dbg(&sep->pdev->dev, "sep_set_time start\n");
do_gettimeofday(&time);
- /* set value in the SYSTEM MEMORY offset */
+ /* Set value in the SYSTEM MEMORY offset */
time_addr = sep_time_address(sep);
time_addr[0] = SEP_TIME_VAL_TOKEN;
/**
* sep_set_caller_id_handler - insert caller id entry
- * @sep: sep device
+ * @sep: SEP device
* @arg: pointer to struct caller_id_struct
*
* Inserts the data into the caller id table. Note that this function
goto end_function;
}
- /* copy the data */
+ /* Copy the data */
if (copy_from_user(&command_args, (void __user *)arg,
sizeof(command_args))) {
error = -EFAULT;
/**
* sep_set_current_caller_id - set the caller id
- * @sep: pointer to struct_sep
+ * @sep: pointer to struct_sep_device
*
- * Set the caller ID (if it exists) to the sep. Note that this
+ * 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)
dev_dbg(&sep->pdev->dev, "sep_set_current_caller_id start\n");
dev_dbg(&sep->pdev->dev, "current process is %d\n", current->pid);
- /* zero the previous value */
+ /* Zero the previous value */
memset(sep->shared_addr + SEP_CALLER_ID_OFFSET_BYTES,
0, SEP_CALLER_ID_HASH_SIZE_IN_BYTES);
/**
* sep_send_command_handler - kick off a command
- * @sep: sep being signalled
+ * @sep: SEP being signalled
*
* This function raises interrupt to SEP that signals that is has a new
* command from the host
}
sep_set_time(sep);
- /* only Medfield has caller id */
+ /* Only Medfield has caller id */
if (sep->mrst == 0)
sep_set_current_caller_id(sep);
sep_dump_message(sep);
- /* update counter */
+ /* Update counter */
spin_lock_irqsave(&sep->snd_rply_lck, lck_flags);
sep->send_ct++;
spin_unlock_irqrestore(&sep->snd_rply_lck, lck_flags);
"sep_send_command_handler send_ct %lx reply_ct %lx\n",
sep->send_ct, sep->reply_ct);
- /* send interrupt to SEP */
+ /* Send interrupt to SEP */
sep_write_reg(sep, HW_HOST_HOST_SEP_GPR0_REG_ADDR, 0x2);
end_function:
/**
* sep_allocate_data_pool_memory_handler -allocate pool memory
- * @sep: pointer to struct_sep
+ * @sep: pointer to struct sep_device
* @arg: pointer to struct alloc_struct
*
* This function handles the allocate data pool memory request
dev_dbg(&sep->pdev->dev,
"command_args.offset: %x\n", command_args.offset);
- /* Place in the shared area that is known by the sep */
+ /* 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));
goto end_function;
}
- /* update the allocation */
+ /* Update the allocation */
sep->data_pool_bytes_allocated += command_args.num_bytes;
sep->num_of_data_allocations += 1;
{
int error = 0;
- /* array of lli */
+ /* Array of lli */
struct sep_lli_entry *lli_array;
- /* map array */
+ /* Map array */
struct sep_dma_map *map_array;
dev_dbg(&sep->pdev->dev,
/*
- * set the start address of the first page - app data may start not at
+ * 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;
(unsigned long)lli_array[0].bus_address,
lli_array[0].block_size);
- /* set the output parameters */
+ /* 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;
int error = 0;
u32 count;
int result;
- /* the the page of the end address of the user space buffer */
+ /* 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 */
+ /* The page of the start address of the user space buffer */
u32 start_page;
- /* the range in pages */
+ /* The range in pages */
u32 num_pages;
- /* array of pointers to page */
+ /* Array of pointers to page */
struct page **page_array;
- /* array of lli */
+ /* Array of lli */
struct sep_lli_entry *lli_array;
- /* map array */
+ /* Map array */
struct sep_dma_map *map_array;
- /* direction of the DMA mapping for locked pages */
+ /* Direction of the DMA mapping for locked pages */
enum dma_data_direction dir;
dev_dbg(&sep->pdev->dev,
"sep_lock_user_pages start\n");
- /* set start and end pages and num pages */
+ /* 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, "starting page_array malloc\n");
- /* allocate array of pages structure pointers */
+ /* Allocate array of pages structure pointers */
page_array = kmalloc(sizeof(struct page *) * num_pages, GFP_ATOMIC);
if (!page_array) {
error = -ENOMEM;
dev_dbg(&sep->pdev->dev, "starting get_user_pages\n");
- /* convert the application virtual address into a set of physical */
+ /* 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,
up_read(¤t->mm->mmap_sem);
- /* check the number of pages locked - if not all then exit with error */
+ /* 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");
dev_dbg(&sep->pdev->dev, "get_user_pages succeeded\n");
- /* set direction */
+ /* 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
+ * 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 */
+ /* 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 */
+ /* Fill the lli array entry */
lli_array[count].bus_address = (u32)map_array[count].dma_addr;
lli_array[count].block_size = PAGE_SIZE;
count, lli_array[count].block_size);
}
- /* check the offset for the first page */
+ /* 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 */
+ /* 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
(unsigned long)lli_array[count].bus_address,
lli_array[count].block_size);
- /* check the size of the last page */
+ /* 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);
lli_array[count].block_size);
}
- /* set output params acording to the in_out flag */
+ /* Set output params acording 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;
goto end_function;
end_function_with_error3:
- /* free lli array */
+ /* Free lli array */
kfree(lli_array);
end_function_with_error2:
kfree(map_array);
end_function_with_error1:
- /* free page array */
+ /* Free page array */
kfree(page_array);
end_function:
u32 *last_table_flag)
{
u32 counter;
- /* table data size */
+ /* Table data size */
u32 table_data_size = 0;
- /* data size for the next table */
+ /* 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
+ * Calculate the data in the out lli table till we fill the whole
* table or till the data has ended
*/
for (counter = 0;
table_data_size += lli_in_array_ptr[counter].block_size;
/*
- * check if we reached the last entry,
+ * 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 */
+ /* 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
+ * 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++) {
}
/*
- * check if the next table data size is less then DMA rstriction.
+ * 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
*/
u32 *num_table_entries_ptr,
u32 table_data_size)
{
- /* current table data size */
+ /* Current table data size */
u32 curr_table_data_size;
- /* counter of lli array entry */
+ /* Counter of lli array entry */
u32 array_counter;
dev_dbg(&sep->pdev->dev, "sep_build_lli_table start\n");
- /* init currrent table data size and lli array entry counter */
+ /* Init currrent 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, "table_data_size is %x\n", table_data_size);
- /* fill the table till table size reaches the needed amount */
+ /* 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 */
+ /* Update the number of entries in table */
(*num_table_entries_ptr)++;
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 */
+ /* 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 */
+ /* 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 */
+ /* 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 */
+ /* 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 */
+ /* Advance to the next entry in the lli_array */
array_counter++;
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 */
+ /* Move to the next entry in table */
lli_table_ptr++;
}
- /* set the info entry to default */
+ /* Set the info entry to default */
lli_table_ptr->bus_address = 0xffffffff;
lli_table_ptr->block_size = 0;
dev_dbg(&sep->pdev->dev, "lli_table_ptr->block_size is %x\n",
lli_table_ptr->block_size);
- /* set the output parameter */
+ /* Set the output parameter */
*num_processed_entries_ptr += array_counter;
dev_dbg(&sep->pdev->dev, "num_processed_entries_ptr is %x\n",
dev_dbg(&sep->pdev->dev, "num_table_entries is %lu\n",
num_table_entries);
- /* print entries of the table (without info entry) */
+ /* Print entries of the table (without info entry) */
for (entries_count = 0; entries_count < num_table_entries;
entries_count++, lli_table_ptr++) {
(unsigned long)lli_table_ptr->bus_address,
lli_table_ptr->block_size);
}
- /* point to the info entry */
+ /* Point to the info entry */
lli_table_ptr--;
dev_dbg(&sep->pdev->dev,
dev_dbg(&sep->pdev->dev, "sep_prepare_empty_lli_table start\n");
- /* find the area for new table */
+ /* Find the area for new table */
lli_table_ptr =
(struct sep_lli_entry *)(sep->shared_addr +
SYNCHRONIC_DMA_TABLES_AREA_OFFSET_BYTES +
lli_table_ptr->bus_address = 0xFFFFFFFF;
lli_table_ptr->block_size = 0;
- /* set the output parameter value */
+ /* 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 */
+ /* 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 */
+ /* Update the number of created tables */
sep->num_lli_tables_created++;
dev_dbg(&sep->pdev->dev, "sep_prepare_empty_lli_table start\n");
*
* This function prepares only input DMA table for synhronic symmetric
* operations (HASH)
- * Note that all bus addresses that are passed to the sep
+ * 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,
bool is_kva)
{
int error = 0;
- /* pointer to the info entry of the table - the last entry */
+ /* Pointer to the info entry of the table - the last entry */
struct sep_lli_entry *info_entry_ptr;
- /* array of pointers to page */
+ /* 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 */
+ /* Points to the first entry to be processed in the lli_in_array */
u32 current_entry = 0;
- /* num entries in the virtual buffer */
+ /* Num entries in the virtual buffer */
u32 sep_lli_entries = 0;
- /* lli table pointer */
+ /* Lli table pointer */
struct sep_lli_entry *in_lli_table_ptr;
- /* the total data in one table */
+ /* The total data in one table */
u32 table_data_size = 0;
- /* flag for last table */
+ /* Flag for last table */
u32 last_table_flag = 0;
- /* number of entries in lli table */
+ /* Number of entries in lli table */
u32 num_entries_in_table = 0;
- /* next table address */
+ /* Next table address */
u32 lli_table_alloc_addr = 0;
dev_dbg(&sep->pdev->dev, "sep_prepare_input_dma_table start\n");
dev_dbg(&sep->pdev->dev, "data_size is %x\n", data_size);
dev_dbg(&sep->pdev->dev, "block_size is %x\n", block_size);
- /* initialize the pages pointers */
+ /* Initialize the pages pointers */
sep->dma_res_arr[sep->nr_dcb_creat].in_page_array = 0;
sep->dma_res_arr[sep->nr_dcb_creat].in_num_pages = 0;
- /* set the kernel address for first table to be allocated */
+ /* Set the kernel address for first table to be allocated */
lli_table_alloc_addr = (u32)(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 */
+ /* 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 */
+ /* Check if the pages are in Kernel Virtual Address layout */
if (is_kva == true)
- /* lock the pages in the kernel */
+ /* 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
+ * Lock the pages of the user buffer
* and translate them to pages
*/
error = sep_lock_user_pages(sep, app_virt_addr,
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 */
+ /* Loop till all the entries in in array are not processed */
while (current_entry < sep_lli_entries) {
- /* set the new input and output tables */
+ /* Set the new input and output tables */
in_lli_table_ptr =
(struct sep_lli_entry *)lli_table_alloc_addr;
}
- /* update the number of created tables */
+ /* Update the number of created tables */
sep->num_lli_tables_created++;
- /* calculate the maximum size of data for input table */
+ /* 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 -
+ * If this is not the last table -
* then allign it to the block size
*/
if (!last_table_flag)
dev_dbg(&sep->pdev->dev, "output table_data_size is %x\n",
table_data_size);
- /* construct input lli table */
+ /* 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 == 0) {
- /* set the output parameters to physical addresses */
+ /* 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;
(unsigned long)*lli_table_ptr);
} else {
- /* update the info entry of the previous in table */
+ /* 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);
((num_entries_in_table) << 24) |
(table_data_size);
}
- /* save the pointer to the info entry of the current tables */
+ /* 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 */
+ /* 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 */
+ /* The array of the pages */
kfree(lli_array_ptr);
update_dcb_counter:
- /* update dcb counter */
+ /* Update DCB counter */
sep->nr_dcb_creat++;
goto end_function;
end_function_error:
- /* free all the allocated resources */
+ /* 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);
}
/**
* sep_construct_dma_tables_from_lli - prepare AES/DES mappings
- * @sep: pointer to struct_sep
+ * @sep: pointer to struct sep_device
* @lli_in_array:
* @sep_in_lli_entries:
* @lli_out_array:
* @out_num_entries_ptr
* @table_data_size_ptr
*
- * This function creates the input and output dma tables for
+ * 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
+ * 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(
u32 *out_num_entries_ptr,
u32 *table_data_size_ptr)
{
- /* points to the area where next lli table can be allocated */
+ /* Points to the area where next lli table can be allocated */
u32 lli_table_alloc_addr = 0;
- /* input lli table */
+ /* Input lli table */
struct sep_lli_entry *in_lli_table_ptr = 0;
- /* output lli table */
+ /* Output lli table */
struct sep_lli_entry *out_lli_table_ptr = 0;
- /* pointer to the info entry of the table - the last entry */
+ /* Pointer to the info entry of the table - the last entry */
struct sep_lli_entry *info_in_entry_ptr = 0;
- /* pointer to the info entry of the table - the last entry */
+ /* Pointer to the info entry of the table - the last entry */
struct sep_lli_entry *info_out_entry_ptr = 0;
- /* points to the first entry to be processed in the lli_in_array */
+ /* 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 */
+ /* Points to the first entry to be processed in the lli_out_array */
u32 current_out_entry = 0;
- /* max size of the input table */
+ /* Max size of the input table */
u32 in_table_data_size = 0;
- /* max size of the output table */
+ /* Max size of the output table */
u32 out_table_data_size = 0;
- /* flag te signifies if this is the last tables build */
+ /* Flag te signifies if this is the last tables build */
u32 last_table_flag = 0;
- /* the data size that should be in table */
+ /* The data size that should be in table */
u32 table_data_size = 0;
- /* number of etnries in the input table */
+ /* Number of etnries in the input table */
u32 num_entries_in_table = 0;
- /* number of etnries in the output table */
+ /* Number of etnries in the output table */
u32 num_entries_out_table = 0;
dev_dbg(&sep->pdev->dev, "sep_construct_dma_tables_from_lli start\n");
- /* initiate to point after the message area */
+ /* Initiate to point after the message area */
lli_table_alloc_addr = (u32)(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 */
+ /* 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 */
+ /* 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 */
+ /* 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 */
+ /* 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) >
((u32)sep->shared_addr +
return -ENOMEM;
}
- /* update the number of the lli tables created */
+ /* 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 */
+ /* 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 */
+ /* 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],
if (!last_table_flag) {
/*
- * if this is not the last table,
+ * If this is not the last table,
* then must check where the data is smallest
* and then align it to the block size
*/
table_data_size = out_table_data_size;
/*
- * now calculate the table size so that
+ * Now calculate the table size so that
* it will be module block size
*/
table_data_size = (table_data_size / block_size) *
dev_dbg(&sep->pdev->dev, "table_data_size is %x\n",
table_data_size);
- /* construct input lli table */
+ /* 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 */
+ /* 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 entry is null - this is the first table built */
if (info_in_entry_ptr == 0) {
- /* set the output parameters to physical addresses */
+ /* Set the output parameters to physical addresses */
*lli_table_in_ptr =
sep_shared_area_virt_to_bus(sep, in_lli_table_ptr);
"output lli_table_out_ptr is %08lx\n",
(unsigned long)*lli_table_out_ptr);
} else {
- /* update the info entry of the previous in table */
+ /* 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);
((num_entries_in_table) << 24) |
(table_data_size);
- /* update the info entry of the previous in table */
+ /* 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);
}
- /* save the pointer to the info entry of the current tables */
+ /* 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 +
(unsigned long)info_out_entry_ptr);
}
- /* print input tables */
+ /* 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 */
+ /* Print output tables */
sep_debug_print_lli_tables(sep,
(struct sep_lli_entry *)
sep_shared_area_bus_to_virt(sep, *lli_table_out_ptr),
* 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
+ * 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,
{
int error = 0;
- /* array of pointers of page */
+ /* Array of pointers of page */
struct sep_lli_entry *lli_in_array;
- /* array of pointers of page */
+ /* Array of pointers of page */
struct sep_lli_entry *lli_out_array;
dev_dbg(&sep->pdev->dev, "sep_prepare_input_output_dma_table start\n");
if (data_size == 0) {
- /* prepare empty table for input and output */
+ /* 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);
goto update_dcb_counter;
}
- /* initialize the pages pointers */
+ /* Initialize the pages pointers */
sep->dma_res_arr[sep->nr_dcb_creat].in_page_array = 0;
sep->dma_res_arr[sep->nr_dcb_creat].out_page_array = 0;
- /* lock the pages of the buffer and translate them to pages */
+ /* 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);
dev_dbg(&sep->pdev->dev, "SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP is %x\n",
SEP_DRIVER_ENTRIES_PER_TABLE_IN_SEP);
- /* call the fucntion that creates table from the lli arrays */
+ /* Call the fucntion 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,
kfree(lli_in_array);
update_dcb_counter:
- /* update dcb counter */
+ /* Update DCB counter */
sep->nr_dcb_creat++;
- /* fall through - free the lli entry arrays */
+ /* Fall through - free the lli entry arrays */
dev_dbg(&sep->pdev->dev, "in_num_entries_ptr is %08x\n",
*in_num_entries_ptr);
dev_dbg(&sep->pdev->dev, "out_num_entries_ptr is %08x\n",
* @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
+ * 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,
bool is_kva)
{
int error = 0;
- /* size of tail */
+ /* Size of tail */
u32 tail_size = 0;
- /* address of the created dcb table */
+ /* Address of the created DCB table */
struct sep_dcblock *dcb_table_ptr = 0;
- /* the physical address of the first input DMA table */
+ /* 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 */
+ /* Number of entries in the first input DMA table */
u32 in_first_num_entries = 0;
- /* the physical address of the first output DMA table */
+ /* 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 */
+ /* Number of entries in the first output DMA table */
u32 out_first_num_entries = 0;
- /* data in the first input/output table */
+ /* Data in the first input/output table */
u32 first_data_size = 0;
dev_dbg(&sep->pdev->dev, "prepare_input_output_dma_table_in_dcb start\n");
if (sep->nr_dcb_creat == SEP_MAX_NUM_SYNC_DMA_OPS) {
- /* No more DCBS to allocate */
- dev_warn(&sep->pdev->dev, "no more dcb's available\n");
+ /* No more DCBs to allocate */
+ dev_warn(&sep->pdev->dev, "no more DCBs available\n");
error = -ENOSPC;
goto end_function;
}
- /* allocate new DCB */
+ /* 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 */
+ /* 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;
}
if (tail_block_size)
/*
- * case the tail size should be
+ * Case the tail size should be
* bigger than the real block size
*/
tail_size = tail_block_size +
tail_block_size) % block_size);
}
- /* check if there is enough data for dma operation */
+ /* 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,
dcb_table_ptr->tail_data_size = data_in_size;
- /* set the output user-space address for mem2mem op */
+ /* Set the output user-space address for mem2mem op */
if (app_out_address)
dcb_table_ptr->out_vr_tail_pt =
(u32)app_out_address;
(void *)(app_in_address + data_in_size -
tail_size), tail_size);
} else {
- /* we have tail data - copy it to dcb */
+ /* 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)) {
data_in_size = (data_in_size - tail_size);
}
}
- /* check if we need to build only input table or input/output */
+ /* Check if we need to build only input table or input/output */
if (app_out_address) {
- /* prepare input/output tables */
+ /* Prepare input/output tables */
error = sep_prepare_input_output_dma_table(sep,
app_in_address,
app_out_address,
&first_data_size,
is_kva);
} else {
- /* prepare input tables */
+ /* Prepare input tables */
error = sep_prepare_input_dma_table(sep,
app_in_address,
data_in_size,
}
if (error) {
- dev_warn(&sep->pdev->dev, "prepare dma table call failed from prepare dcb call\n");
+ dev_warn(&sep->pdev->dev, "prepare DMA table call failed from prepare DCB call\n");
goto end_function;
}
- /* set the dcb values */
+ /* 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;
/**
- * sep_create_sync_dma_tables_handler - create sync dma tables
+ * sep_create_sync_dma_tables_handler - create sync DMA tables
* @sep: pointer to struct sep_device
* @arg: pointer to struct bld_syn_tab_struct
*
{
int error = 0;
- /* command arguments */
+ /* Command arguments */
struct bld_syn_tab_struct command_args;
dev_dbg(&sep->pdev->dev,
dev_dbg(&sep->pdev->dev, "block_size is %u\n",
command_args.block_size);
- /* validate user parameters */
+ /* Validate user parameters */
if (!command_args.app_in_address) {
error = -EINVAL;
goto end_function;
* @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 block
+ * 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)
dev_dbg(&sep->pdev->dev, "sep_free_dma_tables_and_dcb start\n");
if (isapplet == true) {
- /* set pointer to first dcb table */
+ /* 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 */
+ /* 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) {
if (is_kva == true) {
dcb_table_ptr->tail_data_size);
}
if (error_temp) {
- /* release the dma resource */
+ /* Release the DMA resource */
error = -EFAULT;
break;
}
}
}
}
- /* free the output pages, if any */
+ /* Free the output pages, if any */
sep_free_dma_table_data_handler(sep);
dev_dbg(&sep->pdev->dev, "sep_free_dma_tables_and_dcb end\n");
(u32)static_pool_addr[1],
(u32)command_args.static_virt_address);
- /* send the parameters to user application */
+ /* Send the parameters to user application */
if (copy_to_user((void __user *) arg, &command_args,
sizeof(struct stat_pool_addr_struct)))
return -EFAULT;
dev_dbg(&sep->pdev->dev, "sep_start_handler start\n");
- /* wait in polling for message from SEP */
+ /* Wait in polling for message from SEP */
do
reg_val = sep_read_reg(sep, HW_HOST_SEP_HOST_GPR3_REG_ADDR);
while (!reg_val);
- /* check the value */
+ /* Check the value */
if (reg_val == 0x1)
- /* fatal error - read error status from GPRO */
+ /* Fatal error - read error status from GPRO */
error = sep_read_reg(sep, HW_HOST_SEP_HOST_GPR0_REG_ADDR);
dev_dbg(&sep->pdev->dev, "sep_start_handler end\n");
return error;
* @length: buffer size
*
* This function performs a checksum for messages that are sent
- * to the sep
+ * to the SEP.
*/
static u32 sep_check_sum_calc(u8 *data, u32 length)
{
* Handles the request for SEP initialization
* Note that this will go away for Medfield once the SCU
* SEP initialization is complete
- * Also note that the message to the sep has components
+ * Also note that the message to the SEP has components
* from user space as well as components written by the driver
* This is becuase the portions of the message that pertain to
* physical addresses must be set by the driver after the message
dev_dbg(&sep->pdev->dev, "sep_init_handler start\n");
- /* make sure that we have not initialized already */
+ /* Make sure that we have not initialized already */
reg_val = sep_read_reg(sep, HW_HOST_SEP_HOST_GPR3_REG_ADDR);
if (reg_val != 0x2) {
goto end_function;
}
- /* only root can initialize */
+ /* Only root can initialize */
if (!capable(CAP_SYS_ADMIN)) {
error = -EACCES;
goto end_function;
}
- /* copy in the parameters */
+ /* Copy in the parameters */
error = copy_from_user(&command_args, (void __user *)arg,
sizeof(struct init_struct));
goto end_function;
}
- /* validate parameters */
+ /* Validate parameters */
if (!command_args.message_addr || !command_args.sep_sram_addr ||
command_args.message_size_in_words > 14) {
error = -EINVAL;
goto end_function;
}
- /* copy in the sep init message */
+ /* Copy in the SEP init message */
addr_hold = (unsigned long)command_args.message_addr;
error = copy_from_user(message_buff,
(void __user *)addr_hold,
goto end_function;
}
- /* load resident, cache, and extapp firmware */
+ /* Load resident, cache, and extapp firmware */
error = sep_load_firmware(sep);
if (error) {
dev_warn(&sep->pdev->dev,
- "init; copy sep init message failed %x\n", error);
+ "init; copy SEP init message failed %x\n", error);
goto end_function;
}
- /* compute the base address */
+ /* Compute the base address */
new_base_addr = sep->shared_bus;
if (sep->resident_bus < new_base_addr)
if (sep->dcache_bus < new_base_addr)
new_base_addr = sep->dcache_bus;
- /* put physical addresses in sep message */
+ /* Put physical addresses in SEP message */
message_buff[3] = (u32)new_base_addr;
message_buff[4] = (u32)sep->shared_bus;
message_buff[6] = (u32)sep->resident_bus;
sep_check_sum_calc((u8 *)message_buff,
command_args.message_size_in_words*sizeof(u32));
- /* debug print of message */
+ /* Debug print of message */
for (counter = 0; counter < command_args.message_size_in_words;
counter++)
- dev_dbg(&sep->pdev->dev, "init; sep message word %d is %x\n",
+ dev_dbg(&sep->pdev->dev, "init; SEP message word %d is %x\n",
counter, message_buff[counter]);
- /* tell the sep the sram address */
+ /* Tell the SEP the sram address */
sep_write_reg(sep, HW_SRAM_ADDR_REG_ADDR, command_args.sep_sram_addr);
- /* push the message to the sep */
+ /* Push the message to the SEP */
for (counter = 0; counter < command_args.message_size_in_words;
counter++) {
sep_write_reg(sep, HW_SRAM_DATA_REG_ADDR,
sep_wait_sram_write(sep);
}
- /* signal sep that message is ready and to init */
+ /* Signal SEP that message is ready and to init */
sep_write_reg(sep, HW_HOST_HOST_SEP_GPR0_REG_ADDR, 0x1);
- /* wait for acknowledge */
+ /* Wait for acknowledge */
dev_dbg(&sep->pdev->dev, "init; waiting for msg response\n");
do
}
dev_dbg(&sep->pdev->dev, "init; end CC INIT, reg_val is %x\n", reg_val);
- /* signal sep to zero the GPR3 */
+ /* Signal SEP to zero the GPR3 */
sep_write_reg(sep, HW_HOST_HOST_SEP_GPR0_REG_ADDR, 0x10);
- /* wait for response */
+ /* Wait for response */
dev_dbg(&sep->pdev->dev, "init; waiting for zero set response\n");
do
{
dev_dbg(&sep->pdev->dev, "sep_end_transaction_handler start\n");
- /* clear the data pool pointers Token */
+ /* 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 */
+ /* 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
+ * 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 */
+ /* Raise event for stuck contextes */
wake_up(&sep->event);
dev_dbg(&sep->pdev->dev, "waking up event\n");
*/
static int sep_prepare_dcb_handler(struct sep_device *sep, unsigned long arg)
{
- /* error */
int error;
- /* command arguments */
+ /* Command arguments */
struct build_dcb_struct command_args;
dev_dbg(&sep->pdev->dev, "sep_prepare_dcb_handler start\n");
unsigned long arg)
{
int error = 0;
- /* command args */
+ /* Command args */
struct rar_hndl_to_bus_struct command_args;
struct RAR_buffer rar_buf;
- /* bus address */
+ /* Bus address */
dma_addr_t rar_bus = 0;
- /* holds the RAR address in the system memory offset */
+ /* Holds the RAR address in the system memory offset */
u32 *rar_addr;
dev_dbg(&sep->pdev->dev, "sep_rar_prepare_output_msg_handler start\n");
- /* copy the data */
+ /* 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 */
+ /* Call to translation function only if user handle is not NULL */
if (command_args.rar_handle) {
memset(&rar_buf, 0, sizeof(rar_buf));
rar_buf.info.handle = (u32)command_args.rar_handle;
}
dev_dbg(&sep->pdev->dev, "rar msg; rar_addr_bus = %x\n", (u32)rar_bus);
- /* set value in the SYSTEM MEMORY offset */
+ /* 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 */
+ /* Copy the physical address to the System Area for the SEP */
rar_addr[0] = SEP_RAR_VAL_TOKEN;
rar_addr[1] = rar_bus;
* @sep: pointer to struct sep_device
* @arg: pointer to user parameters
*
- * This function tells the sep where the extapp is located
+ * This function tells the SEP where the extapp is located
*/
static int sep_realloc_ext_cache_handler(struct sep_device *sep,
unsigned long arg)
{
- /* holds the new ext cache address in the system memory offset */
+ /* Holds the new ext cache address in the system memory offset */
u32 *system_addr;
- /* set value in the SYSTEM MEMORY offset */
+ /* Set value in the SYSTEM MEMORY offset */
system_addr = (u32 *)(sep->shared_addr +
SEP_DRIVER_SYSTEM_EXT_CACHE_ADDR_OFFSET_IN_BYTES);
- /* copy the physical address to the System Area for the sep */
+ /* Copy the physical address to the System Area for the SEP */
system_addr[0] = SEP_EXT_CACHE_ADDR_VAL_TOKEN;
dev_dbg(&sep->pdev->dev, "ext cache init; system addr 0 is %x\n",
system_addr[0]);
dev_dbg(&sep->pdev->dev,
"SEP_IOCFREEDCB is %x\n", SEP_IOCFREEDCB);
- /* make sure we own this device */
+ /* Make sure we own this device */
mutex_lock(&sep->sep_mutex);
if ((current->pid != sep->pid_doing_transaction) &&
(sep->pid_doing_transaction != 0)) {
mutex_unlock(&sep->sep_mutex);
- /* check that the command is for sep device */
+ /* Check that the command is for SEP device */
if (_IOC_TYPE(cmd) != SEP_IOC_MAGIC_NUMBER) {
error = -ENOTTY;
goto end_function;
}
- /* lock to prevent the daemon to interfere with operation */
+ /* Lock to prevent the daemon to interfere with operation */
mutex_lock(&sep->ioctl_mutex);
switch (cmd) {
case SEP_IOCSENDSEPCOMMAND:
- /* send command to SEP */
+ /* Send command to SEP */
error = sep_send_command_handler(sep);
break;
case SEP_IOCALLOCDATAPOLL:
- /* allocate data pool */
+ /* Allocate data pool */
error = sep_allocate_data_pool_memory_handler(sep, arg);
break;
case SEP_IOCCREATESYMDMATABLE:
- /* create dma table for synhronic operation */
+ /* Create DMA table for synhronic operation */
error = sep_create_sync_dma_tables_handler(sep, arg);
break;
case SEP_IOCFREEDMATABLEDATA:
- /* free the pages */
+ /* Free the pages */
error = sep_free_dma_table_data_handler(sep);
break;
case SEP_IOCSEPSTART:
- /* start command to sep */
- if (sep->pdev->revision == 0) /* only for old chip */
+ /* Start command to SEP */
+ if (sep->pdev->revision == 0) /* Only for old chip */
error = sep_start_handler(sep);
else
- error = -EPERM; /* not permitted on new chip */
+ error = -EPERM; /* Not permitted on new chip */
break;
case SEP_IOCSEPINIT:
- /* init command to sep */
- if (sep->pdev->revision == 0) /* only for old chip */
+ /* Init command to SEP */
+ if (sep->pdev->revision == 0) /* Only for old chip */
error = sep_init_handler(sep, arg);
else
- error = -EPERM; /* not permitted on new chip */
+ error = -EPERM; /* Not permitted on new chip */
break;
case SEP_IOCGETSTATICPOOLADDR:
- /* get the physical and virtual addresses of the static pool */
+ /* Get the physical and virtual addresses of the static pool */
error = sep_get_static_pool_addr_handler(sep, arg);
break;
case SEP_IOCENDTRANSACTION:
case SEP_IOCREALLOCEXTCACHE:
if (sep->mrst)
error = -ENODEV;
- if (sep->pdev->revision == 0) /* only for old chip */
+ if (sep->pdev->revision == 0) /* Only for old chip */
error = sep_realloc_ext_cache_handler(sep, arg);
else
- error = -EPERM; /* not permitted on new chip */
+ error = -EPERM; /* Not permitted on new chip */
break;
case SEP_IOCRARPREPAREMESSAGE:
error = sep_rar_prepare_output_msg_handler(sep, arg);
*/
static long sep_singleton_ioctl(struct file *filp, u32 cmd, unsigned long arg)
{
- /* error */
long error = 0;
struct sep_device *sep = filp->private_data;
dev_dbg(&sep->pdev->dev, "singleton_ioctl start\n");
dev_dbg(&sep->pdev->dev, "cmd is %x\n", cmd);
- /* check that the command is for sep device */
+ /* Check that the command is for the SEP device */
if (_IOC_TYPE(cmd) != SEP_IOC_MAGIC_NUMBER) {
error = -ENOTTY;
goto end_function;
}
- /* make sure we own this device */
+ /* 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, "daemon ioctl: start\n");
dev_dbg(&sep->pdev->dev, "daemon ioctl: cmd is %x\n", cmd);
- /* check that the command is for sep device */
+ /* Check that the command is for SEP device */
if (_IOC_TYPE(cmd) != SEP_IOC_MAGIC_NUMBER) {
error = -ENOTTY;
goto end_function;
}
- /* only one process can access ioctl at any given time */
+ /* 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 */
+ /* Send reply command to SEP */
error = sep_req_daemon_send_reply_command_handler(sep);
break;
case SEP_IOCENDTRANSACTION:
/*
- * end req daemon transaction, do nothing
+ * End req daemon transaction, do nothing
* will be removed upon update in middleware
* API library
*/
}
/**
- * sep_inthandler - Interrupt Handler
+ * sep_inthandler - interrupt handler
* @irq: interrupt
* @dev_id: device id
*/
u32 reg_val, reg_val2 = 0;
struct sep_device *sep = dev_id;
- /* read the IRR register to check if this is SEP interrupt */
+ /* Read the IRR register to check if this is SEP interrupt */
reg_val = sep_read_reg(sep, HW_HOST_IRR_REG_ADDR);
dev_dbg(&sep->pdev->dev, "SEP Interrupt - reg is %08x\n", reg_val);
if (reg_val & (0x1 << 13)) {
- /* lock and update the counter of reply messages */
+ /* 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? */
+ /* 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);
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");
+ dev_dbg(&sep->pdev->dev, "int: SEP reply\n");
wake_up(&sep->event);
}
} else {
- dev_dbg(&sep->pdev->dev, "int: not sep interrupt\n");
+ dev_dbg(&sep->pdev->dev, "int: not SEP interrupt\n");
int_error = IRQ_NONE;
}
if (int_error == IRQ_HANDLED)
int error = 0;
struct sep_device *sep;
- pr_debug("Sep pci probe starting\n");
+ pr_debug("SEP pci probe starting\n");
if (sep_dev != NULL) {
dev_warn(&pdev->dev, "only one SEP supported.\n");
return -EBUSY;
}
- /* enable the device */
+ /* 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 */
+ /* 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,
}
/*
- * we're going to use another variable for actually
+ * 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
dev_dbg(&sep->pdev->dev, "PCI obtained, device being prepared\n");
dev_dbg(&sep->pdev->dev, "revision is %d\n", sep->pdev->revision);
- /* set up our register area */
+ /* 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");
(unsigned long long)sep->reg_physical_end,
sep->reg_addr);
- /* allocate the shared area */
+ /* 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 +
if (sep_map_and_alloc_shared_area(sep)) {
error = -ENOMEM;
- /* allocation failed */
+ /* Allocation failed */
goto end_function_error;
}
- /* the next section depends on type of unit */
+ /* The next section depends on type of unit */
if (sep->mrst) {
error = register_rar(RAR_TYPE_IMAGE, &sep_callback,
(unsigned long)sep);
dev_dbg(&sep->pdev->dev, "about to write IMR and ICR REG_ADDR\n");
- /* clear ICR register */
+ /* Clear ICR register */
sep_write_reg(sep, HW_HOST_ICR_REG_ADDR, 0xFFFFFFFF);
- /* set the IMR register - open only GPR 2 */
+ /* Set the IMR register - open only GPR 2 */
sep_write_reg(sep, HW_HOST_IMR_REG_ADDR, (~(0x1 << 13)));
dev_dbg(&sep->pdev->dev, "about to call request_irq\n");
- /* get the interrupt line */
+ /* Get the interrupt line */
error = request_irq(pdev->irq, sep_inthandler, IRQF_SHARED,
"sep_driver", sep);
goto end_function;
end_function_deallocate_sep_shared_area:
- /* de-allocate shared area */
+ /* De-allocate shared area */
sep_unmap_and_free_shared_area(sep);
end_function_error:
MODULE_DEVICE_TABLE(pci, sep_pci_id_tbl);
-/* field for registering driver to PCI device */
+/* Field for registering driver to PCI device */
static struct pci_driver sep_pci_driver = {
.name = "sep_sec_driver",
.id_table = sep_pci_id_tbl,
/* FIXME: remove handler */
};
-/* file operation for singleton sep operations */
+/* File operation for singleton SEP operations */
static const struct file_operations singleton_file_operations = {
.owner = THIS_MODULE,
.unlocked_ioctl = sep_singleton_ioctl,
.mmap = sep_mmap,
};
-/* file operation for daemon operations */
+/* File operation for daemon operations */
static const struct file_operations daemon_file_operations = {
.owner = THIS_MODULE,
.unlocked_ioctl = sep_request_daemon_ioctl,
.mmap = sep_request_daemon_mmap,
};
-/* the files operations structure of the driver */
+/* The files operations structure of the driver */
static const struct file_operations sep_file_operations = {
.owner = THIS_MODULE,
.unlocked_ioctl = sep_ioctl,
dev_dbg(&sep->pdev->dev, "reconfig shared area start\n");
- /* send the new SHARED MESSAGE AREA to the SEP */
+ /* Send the new SHARED MESSAGE AREA to the SEP */
dev_dbg(&sep->pdev->dev, "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 */
+ /* Poll for SEP response */
ret_val = sep_read_reg(sep, HW_HOST_SEP_HOST_GPR1_REG_ADDR);
while (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) */
+ /* 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 = misc_register(&sep->miscdev_sep);
if (ret_val) {
- dev_warn(&sep->pdev->dev, "misc reg fails for sep %x\n",
+ dev_warn(&sep->pdev->dev, "misc reg fails for SEP %x\n",
ret_val);
return ret_val;
}
int ret_val = 0;
struct sep_device *sep = NULL;
- pr_debug("Sep driver: Init start\n");
+ pr_debug("SEP driver: Init start\n");
ret_val = pci_register_driver(&sep_pci_driver);
if (ret_val) {
mutex_init(&sep->sep_mutex);
mutex_init(&sep->ioctl_mutex);
- /* new chip requires share area reconfigure */
- if (sep->pdev->revision == 4) { /* only for new chip */
+ /* The new chip requires ashared area reconfigure */
+ if (sep->pdev->revision == 4) { /* Only for new chip */
ret_val = sep_reconfig_shared_area(sep);
if (ret_val)
goto end_function_unregister_pci;
}
- /* register driver to fs */
+ /* Register driver to fs */
ret_val = sep_register_driver_to_fs(sep);
if (ret_val) {
dev_warn(&sep->pdev->dev, "error registering device to file\n");
sep = sep_dev;
pr_debug("Exit start\n");
- /* unregister from fs */
+ /* Unregister from fs */
misc_deregister(&sep->miscdev_sep);
misc_deregister(&sep->miscdev_singleton);
misc_deregister(&sep->miscdev_daemon);
- /* free the irq */
+ /* Free the irq */
free_irq(sep->pdev->irq, sep);
- /* unregister the driver */
+ /* Unregister the driver */
pci_unregister_driver(&sep_pci_driver);
- /* free shared area */
+ /* Free the shared area */
if (sep_dev) {
sep_unmap_and_free_shared_area(sep_dev);
dev_dbg(&sep->pdev->dev,
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff