drivers/net/ethernet/freescale/fman/fman_sp.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/freescale/fman/fman_sp.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/freescale/fman/fman_sp.c
Extension
.c
Size
4540 bytes
Lines
143
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (buf_size < sizes_array[ordered_array[j]]) {
					/* move the pool_ids one place ahead
					 * to make room for this poolId
					 */
					for (k = i; k > j; k--)
						ordered_array[k] =
						    ordered_array[k - 1];

					/* now k==j, this is the place for
					 * the new size
					 */
					ordered_array[k] =
					    fm_ext_pools->ext_buf_pool[i].id;
					break;
				}
			}
		}
	}
}
EXPORT_SYMBOL(fman_sp_set_buf_pools_in_asc_order_of_buf_sizes);

int fman_sp_build_buffer_struct(struct fman_sp_int_context_data_copy *
				int_context_data_copy,
				struct fman_buffer_prefix_content *
				buffer_prefix_content,
				struct fman_sp_buf_margins *buf_margins,
				struct fman_sp_buffer_offsets *buffer_offsets,
				u8 *internal_buf_offset)
{
	u32 tmp;

	/* Align start of internal context data to 16 byte */
	int_context_data_copy->ext_buf_offset = (u16)
		((buffer_prefix_content->priv_data_size & (OFFSET_UNITS - 1)) ?
		((buffer_prefix_content->priv_data_size + OFFSET_UNITS) &
			~(u16)(OFFSET_UNITS - 1)) :
		buffer_prefix_content->priv_data_size);

	/* Translate margin and int_context params to FM parameters */
	/* Initialize with illegal value. Later we'll set legal values. */
	buffer_offsets->prs_result_offset = (u32)ILLEGAL_BASE;
	buffer_offsets->time_stamp_offset = (u32)ILLEGAL_BASE;
	buffer_offsets->hash_result_offset = (u32)ILLEGAL_BASE;

	/* Internally the driver supports 4 options
	 * 1. prsResult/timestamp/hashResult selection (in fact 8 options,
	 * but for simplicity we'll
	 * relate to it as 1).
	 * 2. All IC context (from AD) not including debug.
	 */

	/* This case covers the options under 1 */
	/* Copy size must be in 16-byte granularity. */
	int_context_data_copy->size =
	    (u16)((buffer_prefix_content->pass_prs_result ? 32 : 0) +
		  ((buffer_prefix_content->pass_time_stamp ||
		  buffer_prefix_content->pass_hash_result) ? 16 : 0));

	/* Align start of internal context data to 16 byte */
	int_context_data_copy->int_context_offset =
	    (u8)(buffer_prefix_content->pass_prs_result ? 32 :
		 ((buffer_prefix_content->pass_time_stamp ||
		 buffer_prefix_content->pass_hash_result) ? 64 : 0));

	if (buffer_prefix_content->pass_prs_result)
		buffer_offsets->prs_result_offset =
		    int_context_data_copy->ext_buf_offset;
	if (buffer_prefix_content->pass_time_stamp)
		buffer_offsets->time_stamp_offset =
		    buffer_prefix_content->pass_prs_result ?
		    (int_context_data_copy->ext_buf_offset +
			sizeof(struct fman_prs_result)) :
		    int_context_data_copy->ext_buf_offset;
	if (buffer_prefix_content->pass_hash_result)
		/* If PR is not requested, whether TS is
		 * requested or not, IC will be copied from TS
			 */
		buffer_offsets->hash_result_offset =
		buffer_prefix_content->pass_prs_result ?
			(int_context_data_copy->ext_buf_offset +
				sizeof(struct fman_prs_result) + 8) :
			int_context_data_copy->ext_buf_offset + 8;

	if (int_context_data_copy->size)
		buf_margins->start_margins =
		    (u16)(int_context_data_copy->ext_buf_offset +
			  int_context_data_copy->size);
	else
		/* No Internal Context passing, STartMargin is
		 * immediately after private_info

Annotation

Implementation Notes