diff options
Diffstat (limited to 'drivers/staging/heci/heci_interface.c')
| -rw-r--r-- | drivers/staging/heci/heci_interface.c | 498 |
1 files changed, 0 insertions, 498 deletions
diff --git a/drivers/staging/heci/heci_interface.c b/drivers/staging/heci/heci_interface.c deleted file mode 100644 index 03e1df1a88a..00000000000 --- a/drivers/staging/heci/heci_interface.c +++ /dev/null @@ -1,498 +0,0 @@ -/* - * Part of Intel(R) Manageability Engine Interface Linux driver - * - * Copyright (c) 2003 - 2008 Intel Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions, and the following disclaimer, - * without modification. - * 2. Redistributions in binary form must reproduce at minimum a disclaimer - * substantially similar to the "NO WARRANTY" disclaimer below - * ("Disclaimer") and any redistribution must be conditioned upon - * including a substantially similar Disclaimer requirement for further - * binary redistribution. - * 3. Neither the names of the above-listed copyright holders nor the names - * of any contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * Alternatively, this software may be distributed under the terms of the - * GNU General Public License ("GPL") version 2 as published by the Free - * Software Foundation. - * - * NO WARRANTY - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING - * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGES. - * - */ - - -#include "heci.h" -#include "heci_interface.h" - - -/** - * heci_set_csr_register - write H_CSR register to the heci device, - * and ignore the H_IS bit for it is write-one-to-zero. - * - * @dev: device object for our driver - */ -void heci_set_csr_register(struct iamt_heci_device *dev) -{ - if ((dev->host_hw_state & H_IS) == H_IS) - dev->host_hw_state &= ~H_IS; - write_heci_register(dev, H_CSR, dev->host_hw_state); - dev->host_hw_state = read_heci_register(dev, H_CSR); -} - -/** - * heci_csr_enable_interrupts - enable heci device interrupts - * - * @dev: device object for our driver - */ -void heci_csr_enable_interrupts(struct iamt_heci_device *dev) -{ - dev->host_hw_state |= H_IE; - heci_set_csr_register(dev); -} - -/** - * heci_csr_disable_interrupts - disable heci device interrupts - * - * @dev: device object for our driver - */ -void heci_csr_disable_interrupts(struct iamt_heci_device *dev) -{ - dev->host_hw_state &= ~H_IE; - heci_set_csr_register(dev); -} - -/** - * heci_csr_clear_his - clear H_IS bit in H_CSR - * - * @dev: device object for our driver - */ -void heci_csr_clear_his(struct iamt_heci_device *dev) -{ - write_heci_register(dev, H_CSR, dev->host_hw_state); - dev->host_hw_state = read_heci_register(dev, H_CSR); -} - -/** - * _host_get_filled_slots - get number of device filled buffer slots - * - * @device: the device structure - * - * returns numer of filled slots - */ -static unsigned char _host_get_filled_slots(const struct iamt_heci_device *dev) -{ - char read_ptr, write_ptr; - - read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8); - write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16); - - return (unsigned char) (write_ptr - read_ptr); -} - -/** - * host_buffer_is_empty - check if host buffer is empty. - * - * @dev: device object for our driver - * - * returns 1 if empty, 0 - otherwise. - */ -int host_buffer_is_empty(struct iamt_heci_device *dev) -{ - unsigned char filled_slots; - - dev->host_hw_state = read_heci_register(dev, H_CSR); - filled_slots = _host_get_filled_slots(dev); - - if (filled_slots > 0) - return 0; - - return 1; -} - -/** - * count_empty_write_slots - count write empty slots. - * - * @dev: device object for our driver - * - * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count - */ -__s32 count_empty_write_slots(const struct iamt_heci_device *dev) -{ - unsigned char buffer_depth, filled_slots, empty_slots; - - buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24); - filled_slots = _host_get_filled_slots(dev); - empty_slots = buffer_depth - filled_slots; - - if (filled_slots > buffer_depth) { - /* overflow */ - return -ESLOTS_OVERFLOW; - } - - return (__s32) empty_slots; -} - -/** - * heci_write_message - write a message to heci device. - * - * @dev: device object for our driver - * @heci_hdr: header of message - * @write_buffer: message buffer will be write - * @write_length: message size will be write - * - * returns 1 if success, 0 - otherwise. - */ -int heci_write_message(struct iamt_heci_device *dev, - struct heci_msg_hdr *header, - unsigned char *write_buffer, - unsigned long write_length) -{ - __u32 temp_msg = 0; - unsigned long bytes_written = 0; - unsigned char buffer_depth, filled_slots, empty_slots; - unsigned long dw_to_write; - - dev->host_hw_state = read_heci_register(dev, H_CSR); - DBG("host_hw_state = 0x%08x.\n", dev->host_hw_state); - DBG("heci_write_message header=%08x.\n", *((__u32 *) header)); - buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24); - filled_slots = _host_get_filled_slots(dev); - empty_slots = buffer_depth - filled_slots; - DBG("filled = %hu, empty = %hu.\n", filled_slots, empty_slots); - - dw_to_write = ((write_length + 3) / 4); - - if (dw_to_write > empty_slots) - return 0; - - write_heci_register(dev, H_CB_WW, *((__u32 *) header)); - - while (write_length >= 4) { - write_heci_register(dev, H_CB_WW, - *(__u32 *) (write_buffer + bytes_written)); - bytes_written += 4; - write_length -= 4; - } - - if (write_length > 0) { - memcpy(&temp_msg, &write_buffer[bytes_written], write_length); - write_heci_register(dev, H_CB_WW, temp_msg); - } - - dev->host_hw_state |= H_IG; - heci_set_csr_register(dev); - dev->me_hw_state = read_heci_register(dev, ME_CSR_HA); - if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA) - return 0; - - dev->write_hang = 0; - return 1; -} - -/** - * count_full_read_slots - count read full slots. - * - * @dev: device object for our driver - * - * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count - */ -__s32 count_full_read_slots(struct iamt_heci_device *dev) -{ - char read_ptr, write_ptr; - unsigned char buffer_depth, filled_slots; - - dev->me_hw_state = read_heci_register(dev, ME_CSR_HA); - buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24); - read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8); - write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16); - filled_slots = (unsigned char) (write_ptr - read_ptr); - - if (filled_slots > buffer_depth) { - /* overflow */ - return -ESLOTS_OVERFLOW; - } - - DBG("filled_slots =%08x \n", filled_slots); - return (__s32) filled_slots; -} - -/** - * heci_read_slots - read a message from heci device. - * - * @dev: device object for our driver - * @buffer: message buffer will be write - * @buffer_length: message size will be read - */ -void heci_read_slots(struct iamt_heci_device *dev, - unsigned char *buffer, unsigned long buffer_length) -{ - __u32 i = 0; - unsigned char temp_buf[sizeof(__u32)]; - - while (buffer_length >= sizeof(__u32)) { - ((__u32 *) buffer)[i] = read_heci_register(dev, ME_CB_RW); - DBG("buffer[%d]= %d\n", i, ((__u32 *) buffer)[i]); - i++; - buffer_length -= sizeof(__u32); - } - - if (buffer_length > 0) { - *((__u32 *) &temp_buf) = read_heci_register(dev, ME_CB_RW); - memcpy(&buffer[i * 4], temp_buf, buffer_length); - } - - dev->host_hw_state |= H_IG; - heci_set_csr_register(dev); -} - -/** - * flow_ctrl_creds - check flow_control credentials. - * - * @dev: device object for our driver - * @file_ext: private data of the file object - * - * returns 1 if flow_ctrl_creds >0, 0 - otherwise. - */ -int flow_ctrl_creds(struct iamt_heci_device *dev, - struct heci_file_private *file_ext) -{ - __u8 i; - - if (!dev->num_heci_me_clients) - return 0; - - if (file_ext == NULL) - return 0; - - if (file_ext->flow_ctrl_creds > 0) - return 1; - - for (i = 0; i < dev->num_heci_me_clients; i++) { - if (dev->me_clients[i].client_id == file_ext->me_client_id) { - if (dev->me_clients[i].flow_ctrl_creds > 0) { - BUG_ON(dev->me_clients[i].props.single_recv_buf - == 0); - return 1; - } - return 0; - } - } - BUG(); - return 0; -} - -/** - * flow_ctrl_reduce - reduce flow_control. - * - * @dev: device object for our driver - * @file_ext: private data of the file object - */ -void flow_ctrl_reduce(struct iamt_heci_device *dev, - struct heci_file_private *file_ext) -{ - __u8 i; - - if (!dev->num_heci_me_clients) - return; - - for (i = 0; i < dev->num_heci_me_clients; i++) { - if (dev->me_clients[i].client_id == file_ext->me_client_id) { - if (dev->me_clients[i].props.single_recv_buf != 0) { - BUG_ON(dev->me_clients[i].flow_ctrl_creds <= 0); - dev->me_clients[i].flow_ctrl_creds--; - } else { - BUG_ON(file_ext->flow_ctrl_creds <= 0); - file_ext->flow_ctrl_creds--; - } - return; - } - } - BUG(); -} - -/** - * heci_send_flow_control - send flow control to fw. - * - * @dev: device object for our driver - * @file_ext: private data of the file object - * - * returns 1 if success, 0 - otherwise. - */ -int heci_send_flow_control(struct iamt_heci_device *dev, - struct heci_file_private *file_ext) -{ - struct heci_msg_hdr *heci_hdr; - struct hbm_flow_control *heci_flow_control; - - heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0]; - heci_hdr->host_addr = 0; - heci_hdr->me_addr = 0; - heci_hdr->length = sizeof(struct hbm_flow_control); - heci_hdr->msg_complete = 1; - heci_hdr->reserved = 0; - - heci_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1]; - memset(heci_flow_control, 0, sizeof(heci_flow_control)); - heci_flow_control->host_addr = file_ext->host_client_id; - heci_flow_control->me_addr = file_ext->me_client_id; - heci_flow_control->cmd.cmd = HECI_FLOW_CONTROL_CMD; - memset(heci_flow_control->reserved, 0, - sizeof(heci_flow_control->reserved)); - DBG("sending flow control host client = %d, me client = %d\n", - file_ext->host_client_id, file_ext->me_client_id); - if (!heci_write_message(dev, heci_hdr, - (unsigned char *) heci_flow_control, - sizeof(struct hbm_flow_control))) - return 0; - - return 1; - -} - -/** - * other_client_is_connecting - check if other - * client with the same client id is connected. - * - * @dev: device object for our driver - * @file_ext: private data of the file object - * - * returns 1 if other client is connected, 0 - otherwise. - */ -int other_client_is_connecting(struct iamt_heci_device *dev, - struct heci_file_private *file_ext) -{ - struct heci_file_private *file_pos = NULL; - struct heci_file_private *file_next = NULL; - - list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) { - if ((file_pos->state == HECI_FILE_CONNECTING) - && (file_pos != file_ext) - && file_ext->me_client_id == file_pos->me_client_id) - return 1; - - } - return 0; -} - -/** - * heci_send_wd - send watch dog message to fw. - * - * @dev: device object for our driver - * - * returns 1 if success, 0 - otherwise. - */ -int heci_send_wd(struct iamt_heci_device *dev) -{ - struct heci_msg_hdr *heci_hdr; - - heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0]; - heci_hdr->host_addr = dev->wd_file_ext.host_client_id; - heci_hdr->me_addr = dev->wd_file_ext.me_client_id; - heci_hdr->msg_complete = 1; - heci_hdr->reserved = 0; - - if (!memcmp(dev->wd_data, heci_start_wd_params, - HECI_WD_PARAMS_SIZE)) { - heci_hdr->length = HECI_START_WD_DATA_SIZE; - } else { - BUG_ON(memcmp(dev->wd_data, heci_stop_wd_params, - HECI_WD_PARAMS_SIZE)); - heci_hdr->length = HECI_WD_PARAMS_SIZE; - } - - if (!heci_write_message(dev, heci_hdr, dev->wd_data, heci_hdr->length)) - return 0; - - return 1; -} - -/** - * heci_disconnect - send disconnect message to fw. - * - * @dev: device object for our driver - * @file_ext: private data of the file object - * - * returns 1 if success, 0 - otherwise. - */ -int heci_disconnect(struct iamt_heci_device *dev, - struct heci_file_private *file_ext) -{ - struct heci_msg_hdr *heci_hdr; - struct hbm_client_disconnect_request *heci_cli_disconnect; - - heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0]; - heci_hdr->host_addr = 0; - heci_hdr->me_addr = 0; - heci_hdr->length = sizeof(struct hbm_client_disconnect_request); - heci_hdr->msg_complete = 1; - heci_hdr->reserved = 0; - - heci_cli_disconnect = - (struct hbm_client_disconnect_request *) &dev->wr_msg_buf[1]; - memset(heci_cli_disconnect, 0, sizeof(heci_cli_disconnect)); - heci_cli_disconnect->host_addr = file_ext->host_client_id; - heci_cli_disconnect->me_addr = file_ext->me_client_id; - heci_cli_disconnect->cmd.cmd = CLIENT_DISCONNECT_REQ_CMD; - heci_cli_disconnect->reserved[0] = 0; - - if (!heci_write_message(dev, heci_hdr, - (unsigned char *) heci_cli_disconnect, - sizeof(struct hbm_client_disconnect_request))) - return 0; - - return 1; -} - -/** - * heci_connect - send connect message to fw. - * - * @dev: device object for our driver - * @file_ext: private data of the file object - * - * returns 1 if success, 0 - otherwise. - */ -int heci_connect(struct iamt_heci_device *dev, - struct heci_file_private *file_ext) -{ - struct heci_msg_hdr *heci_hdr; - struct hbm_client_connect_request *heci_cli_connect; - - heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0]; - heci_hdr->host_addr = 0; - heci_hdr->me_addr = 0; - heci_hdr->length = sizeof(struct hbm_client_connect_request); - heci_hdr->msg_complete = 1; - heci_hdr->reserved = 0; - - heci_cli_connect = - (struct hbm_client_connect_request *) &dev->wr_msg_buf[1]; - heci_cli_connect->host_addr = file_ext->host_client_id; - heci_cli_connect->me_addr = file_ext->me_client_id; - heci_cli_connect->cmd.cmd = CLIENT_CONNECT_REQ_CMD; - heci_cli_connect->reserved = 0; - - if (!heci_write_message(dev, heci_hdr, - (unsigned char *) heci_cli_connect, - sizeof(struct hbm_client_connect_request))) - return 0; - - return 1; -} |