Esempio n. 1
0
/* Lock during transfers */
int ocmem_rdm_transfer(int id, struct ocmem_map_list *clist,
			unsigned long start, int direction)
{
	int num_chunks = clist->num_chunks;
	int slot = client_slot_start(id);
	int table_start = 0;
	int table_end = 0;
	int br_ctrl = 0;
	int br_id = 0;
	int client_id = 0;
	int dm_ctrl = 0;
	int i = 0;
	int j = 0;
	int status = 0;
	int rc = 0;

	rc = ocmem_enable_core_clock();

	if (rc < 0) {
		pr_err("RDM transfer failed for client %s (id: %d)\n",
				get_name(id), id);
		return rc;
	}

	/* Clear DM Mask */
	ocmem_write(DM_MASK_RESET, dm_base + DM_INTR_MASK);
	/* Clear DM Interrupts */
	ocmem_write(DM_INTR_RESET, dm_base + DM_INTR_CLR);

	for (i = 0, j = slot; i < num_chunks; i++, j++) {

		struct ocmem_chunk *chunk = &clist->chunks[i];
		int sz = chunk->size;
		int paddr = chunk->ddr_paddr;
		int tbl_n_ctrl = 0;

		tbl_n_ctrl |= BR_TBL_ENTRY_ENABLE;
		if (chunk->ro)
			tbl_n_ctrl |= (1 << BR_RW_SHIFT);

		/* Table Entry n of BR and DM */
		ocmem_write(start, br_base + BR_TBL_n_offset(j));
		ocmem_write(sz, br_base + BR_TBL_n_size(j));
		ocmem_write(paddr, br_base + BR_TBL_n_paddr(j));
		ocmem_write(tbl_n_ctrl, br_base + BR_TBL_n_ctrl(j));

		ocmem_write(start, dm_base + DM_TBL_n_offset(j));
		ocmem_write(sz, dm_base + DM_TBL_n_size(j));
		ocmem_write(paddr, dm_base + DM_TBL_n_paddr(j));
		ocmem_write(tbl_n_ctrl, dm_base + DM_TBL_n_ctrl(j));

		start += sz;
	}

	br_id = client_ctrl_id(id);
	table_start = slot;
	table_end = slot + num_chunks - 1;
	br_ctrl |= (table_start << BR_TBL_START);
	br_ctrl |= (table_end << BR_TBL_END);

	ocmem_write(br_ctrl, (br_base + BR_CLIENT_n_ctrl(br_id)));
	/* Enable BR */
	ocmem_write(0x1, br_base + BR_CTRL);

	/* Compute DM Control Value */
	dm_ctrl |= (table_start << DM_TBL_START);
	dm_ctrl |= (table_end << DM_TBL_END);

	client_id = client_ctrl_id(id);
	dm_ctrl |= (client_id << DM_CLIENT_SHIFT);
	dm_ctrl |= (DM_BR_ID_LPASS << DM_BR_ID_SHIFT);
	dm_ctrl |= (DM_BLOCK_256 << DM_BR_BLK_SHIFT);
	dm_ctrl |= (direction << DM_DIR_SHIFT);

	status = ocmem_read(dm_base + DM_GEN_STATUS);
	pr_debug("Transfer status before %x\n", status);
	INIT_COMPLETION(dm_transfer_event);
	/* The DM and BR tables must be programmed before triggering the
	 * Data Mover else the coherent transfer would be corrupted
	 */
	mb();
	/* Trigger DM */
	ocmem_write(dm_ctrl, dm_base + DM_CTRL);
	pr_debug("ocmem: rdm: dm_ctrl %x br_ctrl %x\n", dm_ctrl, br_ctrl);

	wait_for_completion(&dm_transfer_event);
	pr_debug("Completed transferring %d segments\n", num_chunks);
	ocmem_disable_core_clock();
	return 0;
}
Esempio n. 2
0
/* Lock during transfers */
int ocmem_rdm_transfer(int id, struct ocmem_map_list *clist,
			unsigned long start, int direction)
{
	int num_chunks = clist->num_chunks;
	int slot = client_slot_start(id);
	int table_start = 0;
	int table_end = 0;
	int br_ctrl = 0;
	int br_id = 0;
	int dm_ctrl = 0;
	int i = 0;
	int j = 0;
	int status = 0;

	for (i = 0, j = slot; i < num_chunks; i++, j++) {

		struct ocmem_chunk *chunk = &clist->chunks[i];
		int sz = chunk->size;
		int paddr = chunk->ddr_paddr;
		int tbl_n_ctrl = 0;

		tbl_n_ctrl |= BR_TBL_ENTRY_ENABLE;
		if (chunk->ro)
			tbl_n_ctrl |= (1 << BR_RW_SHIFT);

		/* Table Entry n of BR and DM */
		ocmem_write(start, br_base + BR_TBL_n_offset(j));
		ocmem_write(sz, br_base + BR_TBL_n_size(j));
		ocmem_write(paddr, br_base + BR_TBL_n_paddr(j));
		ocmem_write(tbl_n_ctrl, br_base + BR_TBL_n_ctrl(j));

		ocmem_write(start, dm_base + DM_TBL_n_offset(j));
		ocmem_write(sz, dm_base + DM_TBL_n_size(j));
		ocmem_write(paddr, dm_base + DM_TBL_n_paddr(j));
		ocmem_write(tbl_n_ctrl, dm_base + DM_TBL_n_ctrl(j));

		start += sz;
	}

	br_id = client_ctrl_id(id);
	table_start = slot;
	table_end = slot + num_chunks - 1;
	br_ctrl |= (table_start << BR_TBL_START);
	br_ctrl |= (table_end << BR_TBL_END);

	ocmem_write(br_ctrl, (br_base + BR_CLIENT_n_ctrl(br_id)));
	/* Enable BR */
	ocmem_write(0x1, br_base + BR_CTRL);

	/* Compute DM Control Value */
	dm_ctrl |= (table_start << DM_TBL_START);
	dm_ctrl |= (table_end << DM_TBL_END);

	dm_ctrl |= (DM_BR_ID_LPASS << DM_BR_ID_SHIFT);
	dm_ctrl |= (DM_BLOCK_256 << DM_BR_BLK_SHIFT);
	dm_ctrl |= (direction << DM_DIR_SHIFT);

	status = ocmem_read(dm_base + DM_STATUS);
	pr_debug("Transfer status before %x\n", status);
	atomic_set(&dm_pending, 1);
	/* Trigger DM */
	ocmem_write(dm_ctrl, dm_base + DM_CTRL);
	pr_debug("ocmem: rdm: dm_ctrl %x br_ctrl %x\n", dm_ctrl, br_ctrl);

	wait_event_interruptible(dm_wq,
		atomic_read(&dm_pending) == 0);

	return 0;
}