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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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f139749001
Use a speed probe to determine the speed over 1394b buses and of nodes which report a link speed less than their PHY speed. Log the effective maximum speed of newly created nodes in dmesg. Also, read the config ROM (except bus info block) at the maximum speed rather than S100. This isn't a real optimization though because we still only use quadlet read requests for the entire ROM. The patch also adds support for S1600 and S3200, although such hardware does not exist yet. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
149 lines
3.6 KiB
C
149 lines
3.6 KiB
C
/*
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* Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __fw_device_h
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#define __fw_device_h
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#include <linux/fs.h>
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#include <linux/cdev.h>
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#include <asm/atomic.h>
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enum fw_device_state {
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FW_DEVICE_INITIALIZING,
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FW_DEVICE_RUNNING,
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FW_DEVICE_SHUTDOWN,
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};
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struct fw_attribute_group {
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struct attribute_group *groups[2];
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struct attribute_group group;
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struct attribute *attrs[11];
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};
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struct fw_device {
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atomic_t state;
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struct fw_node *node;
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int node_id;
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int generation;
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unsigned max_speed;
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struct fw_card *card;
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struct device device;
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struct list_head link;
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struct list_head client_list;
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u32 *config_rom;
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size_t config_rom_length;
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int config_rom_retries;
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struct delayed_work work;
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struct fw_attribute_group attribute_group;
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};
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static inline struct fw_device *
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fw_device(struct device *dev)
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{
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return container_of(dev, struct fw_device, device);
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}
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static inline int
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fw_device_is_shutdown(struct fw_device *device)
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{
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return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
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}
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struct fw_device *fw_device_get(struct fw_device *device);
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void fw_device_put(struct fw_device *device);
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int fw_device_enable_phys_dma(struct fw_device *device);
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void fw_device_cdev_update(struct fw_device *device);
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void fw_device_cdev_remove(struct fw_device *device);
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struct fw_device *fw_device_from_devt(dev_t devt);
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extern int fw_cdev_major;
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struct fw_unit {
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struct device device;
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u32 *directory;
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struct fw_attribute_group attribute_group;
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};
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static inline struct fw_unit *
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fw_unit(struct device *dev)
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{
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return container_of(dev, struct fw_unit, device);
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}
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#define CSR_OFFSET 0x40
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#define CSR_LEAF 0x80
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#define CSR_DIRECTORY 0xc0
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#define CSR_DESCRIPTOR 0x01
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#define CSR_VENDOR 0x03
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#define CSR_HARDWARE_VERSION 0x04
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#define CSR_NODE_CAPABILITIES 0x0c
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#define CSR_UNIT 0x11
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#define CSR_SPECIFIER_ID 0x12
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#define CSR_VERSION 0x13
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#define CSR_DEPENDENT_INFO 0x14
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#define CSR_MODEL 0x17
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#define CSR_INSTANCE 0x18
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#define CSR_DIRECTORY_ID 0x20
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#define SBP2_COMMAND_SET_SPECIFIER 0x38
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#define SBP2_COMMAND_SET 0x39
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#define SBP2_COMMAND_SET_REVISION 0x3b
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#define SBP2_FIRMWARE_REVISION 0x3c
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struct fw_csr_iterator {
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u32 *p;
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u32 *end;
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};
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void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);
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int fw_csr_iterator_next(struct fw_csr_iterator *ci,
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int *key, int *value);
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#define FW_MATCH_VENDOR 0x0001
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#define FW_MATCH_MODEL 0x0002
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#define FW_MATCH_SPECIFIER_ID 0x0004
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#define FW_MATCH_VERSION 0x0008
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struct fw_device_id {
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u32 match_flags;
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u32 vendor;
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u32 model;
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u32 specifier_id;
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u32 version;
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void *driver_data;
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};
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struct fw_driver {
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struct device_driver driver;
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/* Called when the parent device sits through a bus reset. */
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void (*update) (struct fw_unit *unit);
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const struct fw_device_id *id_table;
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};
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static inline struct fw_driver *
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fw_driver(struct device_driver *drv)
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{
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return container_of(drv, struct fw_driver, driver);
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}
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extern const struct file_operations fw_device_ops;
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#endif /* __fw_device_h */
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