1 // SPDX-License-Identifier: GPL-2.0
3  *    driver for Microchip PQI-based storage controllers
4  *    Copyright (c) 2019-2023 Microchip Technology Inc. and its subsidiaries
5  *    Copyright (c) 2016-2018 Microsemi Corporation
6  *    Copyright (c) 2016 PMC-Sierra, Inc.
110 		status = readl(&ctrl_info->registers->sis_firmware_status);  in sis_wait_for_ctrl_ready_with_timeout()
113 				dev_err(&ctrl_info->pci_dev->dev,  in sis_wait_for_ctrl_ready_with_timeout()
114 					"controller is offline: status code 0x%x\n",  in sis_wait_for_ctrl_ready_with_timeout()
116 					&ctrl_info->registers->sis_mailbox[7]));  in sis_wait_for_ctrl_ready_with_timeout()
117 				return -ENODEV;  in sis_wait_for_ctrl_ready_with_timeout()
123 			dev_err(&ctrl_info->pci_dev->dev,  in sis_wait_for_ctrl_ready_with_timeout()
124 				"controller not ready after %u seconds\n",  in sis_wait_for_ctrl_ready_with_timeout()
126 			return -ETIMEDOUT;  in sis_wait_for_ctrl_ready_with_timeout()
151 	status = readl(&ctrl_info->registers->sis_firmware_status);  in sis_is_firmware_running()
159 		dev_err(&ctrl_info->pci_dev->dev,  in sis_is_firmware_running()
160 			"controller is offline: status code 0x%x\n",  in sis_is_firmware_running()
161 			readl(&ctrl_info->registers->sis_mailbox[7]));  in sis_is_firmware_running()
168 	return readl(&ctrl_info->registers->sis_firmware_status) &  in sis_is_kernel_up()
174 	return readl(&ctrl_info->registers->sis_product_identifier);  in sis_get_product_id()
179 	u32	mailbox[6];	/* mailboxes 0-5 */  member
191 	registers = ctrl_info->registers;  in sis_send_sync_cmd()
193 	/* Write the command to mailbox 0. */  in sis_send_sync_cmd()
194 	writel(cmd, &registers->sis_mailbox[0]);  in sis_send_sync_cmd()
197 	 * Write the command parameters to mailboxes 1-4 (mailbox 5 is not used  in sis_send_sync_cmd()
198 	 * when sending a command to the controller).  in sis_send_sync_cmd()
201 		writel(params->mailbox[i], &registers->sis_mailbox[i]);  in sis_send_sync_cmd()
205 		&registers->sis_ctrl_to_host_doorbell_clear);  in sis_send_sync_cmd()
208 	writel(~0, &registers->sis_interrupt_mask);  in sis_send_sync_cmd()
215 	readl(&registers->sis_interrupt_mask);  in sis_send_sync_cmd()
217 	/* Submit the command to the controller. */  in sis_send_sync_cmd()
218 	writel(SIS_CMD_READY, &registers->sis_host_to_ctrl_doorbell);  in sis_send_sync_cmd()
222 	 * the top of the loop in order to give the controller time to start  in sis_send_sync_cmd()
228 		doorbell = readl(&registers->sis_ctrl_to_host_doorbell);  in sis_send_sync_cmd()
232 			return -ETIMEDOUT;  in sis_send_sync_cmd()
235 	/* Read the command status from mailbox 0. */  in sis_send_sync_cmd()
236 	cmd_status = readl(&registers->sis_mailbox[0]);  in sis_send_sync_cmd()
238 		dev_err(&ctrl_info->pci_dev->dev,  in sis_send_sync_cmd()
241 		return -EINVAL;  in sis_send_sync_cmd()
246 	 * read the values returned in mailboxes 1-5.  in sis_send_sync_cmd()
248 	params->mailbox[0] = cmd_status;  in sis_send_sync_cmd()
249 	for (i = 1; i < ARRAY_SIZE(params->mailbox); i++)  in sis_send_sync_cmd()
250 		params->mailbox[i] = readl(&registers->sis_mailbox[i]);  in sis_send_sync_cmd()
256  * This function verifies that we are talking to a controller that speaks PQI.
273 	properties = params.mailbox[1];  in sis_get_ctrl_properties()
276 		return -ENODEV;  in sis_get_ctrl_properties()
278 	extended_properties = params.mailbox[4];  in sis_get_ctrl_properties()
282 		return -ENODEV;  in sis_get_ctrl_properties()
285 		ctrl_info->pqi_reset_quiesce_supported = true;  in sis_get_ctrl_properties()
302 	ctrl_info->max_sg_entries = params.mailbox[1];  in sis_get_pqi_capabilities()
303 	ctrl_info->max_transfer_size = params.mailbox[2];  in sis_get_pqi_capabilities()
304 	ctrl_info->max_outstanding_requests = params.mailbox[3];  in sis_get_pqi_capabilities()
305 	ctrl_info->config_table_offset = params.mailbox[4];  in sis_get_pqi_capabilities()
306 	ctrl_info->config_table_length = params.mailbox[5];  in sis_get_pqi_capabilities()
321 		+ SIS_BASE_STRUCT_ALIGNMENT - 1, GFP_KERNEL);  in sis_init_base_struct_addr()
323 		return -ENOMEM;  in sis_init_base_struct_addr()
327 	error_buffer_paddr = (unsigned long)ctrl_info->error_buffer_dma_handle;  in sis_init_base_struct_addr()
329 	put_unaligned_le32(SIS_BASE_STRUCT_REVISION, &base_struct->revision);  in sis_init_base_struct_addr()
331 		&base_struct->error_buffer_paddr_low);  in sis_init_base_struct_addr()
333 		&base_struct->error_buffer_paddr_high);  in sis_init_base_struct_addr()
335 		&base_struct->error_buffer_element_length);  in sis_init_base_struct_addr()
336 	put_unaligned_le32(ctrl_info->max_io_slots,  in sis_init_base_struct_addr()
337 		&base_struct->error_buffer_num_elements);  in sis_init_base_struct_addr()
339 	bus_address = dma_map_single(&ctrl_info->pci_dev->dev, base_struct,  in sis_init_base_struct_addr()
341 	if (dma_mapping_error(&ctrl_info->pci_dev->dev, bus_address)) {  in sis_init_base_struct_addr()
342 		rc = -ENOMEM;  in sis_init_base_struct_addr()
347 	params.mailbox[1] = lower_32_bits((u64)bus_address);  in sis_init_base_struct_addr()
348 	params.mailbox[2] = upper_32_bits((u64)bus_address);  in sis_init_base_struct_addr()
349 	params.mailbox[3] = sizeof(*base_struct);  in sis_init_base_struct_addr()
354 	dma_unmap_single(&ctrl_info->pci_dev->dev, bus_address,  in sis_init_base_struct_addr()
375 			readl(&ctrl_info->registers->sis_host_to_ctrl_doorbell);  in sis_wait_for_doorbell_bit_to_clear()
378 		if (readl(&ctrl_info->registers->sis_firmware_status) &  in sis_wait_for_doorbell_bit_to_clear()
380 			rc = -ENODEV;  in sis_wait_for_doorbell_bit_to_clear()
384 			dev_err(&ctrl_info->pci_dev->dev,  in sis_wait_for_doorbell_bit_to_clear()
387 			rc = -ETIMEDOUT;  in sis_wait_for_doorbell_bit_to_clear()
398 	writel(bit, &ctrl_info->registers->sis_host_to_ctrl_doorbell);  in sis_set_doorbell_bit()
417 	if (readl(&ctrl_info->registers->sis_firmware_status) &  in sis_shutdown_ctrl()
421 	if (ctrl_info->firmware_triage_supported)  in sis_shutdown_ctrl()
422 		writel(ctrl_shutdown_reason, &ctrl_info->registers->sis_ctrl_shutdown_reason_code);  in sis_shutdown_ctrl()
424 	writel(SIS_TRIGGER_SHUTDOWN, &ctrl_info->registers->sis_host_to_ctrl_doorbell);  in sis_shutdown_ctrl()
439 	writel(value, &ctrl_info->registers->sis_driver_scratch);  in sis_write_driver_scratch()
445 	return readl(&ctrl_info->registers->sis_driver_scratch);  in sis_read_driver_scratch()
451 	return ((enum sis_fw_triage_status)(readl(&ctrl_info->registers->sis_firmware_status) &  in sis_read_firmware_triage_status()
457 	return readl(&ctrl_info->registers->sis_firmware_status) & SIS_CTRL_KERNEL_CTRL_LOGGING;  in sis_is_ctrl_logging_supported()
467 …return ((enum sis_ctrl_logging_status)((readl(&ctrl_info->registers->sis_firmware_status) & SIS_CT…  in sis_read_ctrl_logging_status()
473 		&ctrl_info->registers->sis_host_to_ctrl_doorbell);  in sis_soft_reset()
489 			dev_err(&ctrl_info->pci_dev->dev,  in sis_wait_for_fw_triage_completion()
491 			rc = -EINVAL;  in sis_wait_for_fw_triage_completion()
500 			dev_err(&ctrl_info->pci_dev->dev,  in sis_wait_for_fw_triage_completion()
502 			rc = -ETIMEDOUT;  in sis_wait_for_fw_triage_completion()
525 			dev_err(&ctrl_info->pci_dev->dev,  in sis_wait_for_ctrl_logging_completion()
526 				"controller data logging condition invalid\n");  in sis_wait_for_ctrl_logging_completion()
527 			rc = -EINVAL;  in sis_wait_for_ctrl_logging_completion()
535 			dev_err(&ctrl_info->pci_dev->dev,  in sis_wait_for_ctrl_logging_completion()
536 				"timed out waiting for controller data logging status\n");  in sis_wait_for_ctrl_logging_completion()
537 			rc = -ETIMEDOUT;  in sis_wait_for_ctrl_logging_completion()