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![Linus Torvalds](/assets/img/avatar_default.png)
The updates consist of three parts; UAPI update, OHCI driver update, and several bug fixes. Firstly, the 1394 OHCI specification defines method to retrieve hardware time stamps for asynchronous communication, which was previously unavailable in user space. This change adds new events to the UAPI, allowing applications to retrieve the time when asynchronous packet are received and sent. The new events are tested in the breeding edge of libhinawa and look to work well. The new version of libhinawa will be released after current merge window is closed. * https://git.kernel.org/pub/scm/libs/ieee1394/libhinawa.git/ Secondly, the FireWire stack includes a PCM device driver for 1394 OHCI hardware, This change modernizes the driver by managed resource (devres) framework. Lastly, the rest of change is bug fixes for firewire-net and firewire-core. -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQQE66IEYNDXNBPeGKSsLtaWM8LwEwUCZKQI3wAKCRCsLtaWM8Lw ExxhAP9rgLdnERNyL0Pw5PoNM71KBXVLYn35UasDZiyraq5UHQEAmptFKIXCwPLY /kw3oumcKTEbYCiiI94JAesfFX/fRw0= =LT8K -----END PGP SIGNATURE----- Merge tag 'firewire-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394 Pull firewire updates from Takashi Sakamoto: "This consist of three parts; UAPI update, OHCI driver update, and several bug fixes. Firstly, the 1394 OHCI specification defines method to retrieve hardware time stamps for asynchronous communication, which was previously unavailable in user space. This adds new events to the UAPI, allowing applications to retrieve the time when asynchronous packet are received and sent. The new events are tested in the bleeding edge of libhinawa and look to work well. The new version of libhinawa will be released after current merge window is closed: https://git.kernel.org/pub/scm/libs/ieee1394/libhinawa.git/ Secondly, the FireWire stack includes a PCM device driver for 1394 OHCI hardware, This change modernizes the driver by managed resource (devres) framework. Lastly, bug fixes for firewire-net and firewire-core" * tag 'firewire-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394: (25 commits) firewire: net: fix use after free in fwnet_finish_incoming_packet() firewire: core: obsolete usage of GFP_ATOMIC at building node tree firewire: ohci: release buffer for AR req/resp contexts when managed resource is released firewire: ohci: use devres for content of configuration ROM firewire: ohci: use devres for IT, IR, AT/receive, and AT/request contexts firewire: ohci: use devres for list of isochronous contexts firewire: ohci: use devres for requested IRQ firewire: ohci: use devres for misc DMA buffer firewire: ohci: use devres for MMIO region mapping firewire: ohci: use devres for PCI-related resources firewire: ohci: use devres for memory object of ohci structure firewire: fix warnings to generate UAPI documentation firewire: fix build failure due to missing module license firewire: cdev: implement new event relevant to phy packet with time stamp firewire: cdev: add new event to notify phy packet with time stamp firewire: cdev: code refactoring to dispatch event for phy packet firewire: cdev: implement new event to notify response subaction with time stamp firewire: cdev: add new event to notify response subaction with time stamp firewire: cdev: code refactoring to operate event of response firewire: core: implement variations to send request and wait for response with time stamp ...
541 lines
16 KiB
C
541 lines
16 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_FIREWIRE_H
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#define _LINUX_FIREWIRE_H
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#include <linux/completion.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/kernel.h>
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#include <linux/kref.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/spinlock.h>
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#include <linux/sysfs.h>
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#include <linux/timer.h>
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#include <linux/types.h>
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#include <linux/workqueue.h>
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#include <linux/atomic.h>
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#include <asm/byteorder.h>
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#define CSR_REGISTER_BASE 0xfffff0000000ULL
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/* register offsets are relative to CSR_REGISTER_BASE */
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#define CSR_STATE_CLEAR 0x0
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#define CSR_STATE_SET 0x4
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#define CSR_NODE_IDS 0x8
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#define CSR_RESET_START 0xc
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#define CSR_SPLIT_TIMEOUT_HI 0x18
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#define CSR_SPLIT_TIMEOUT_LO 0x1c
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#define CSR_CYCLE_TIME 0x200
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#define CSR_BUS_TIME 0x204
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#define CSR_BUSY_TIMEOUT 0x210
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#define CSR_PRIORITY_BUDGET 0x218
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#define CSR_BUS_MANAGER_ID 0x21c
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#define CSR_BANDWIDTH_AVAILABLE 0x220
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#define CSR_CHANNELS_AVAILABLE 0x224
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#define CSR_CHANNELS_AVAILABLE_HI 0x224
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#define CSR_CHANNELS_AVAILABLE_LO 0x228
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#define CSR_MAINT_UTILITY 0x230
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#define CSR_BROADCAST_CHANNEL 0x234
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#define CSR_CONFIG_ROM 0x400
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#define CSR_CONFIG_ROM_END 0x800
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#define CSR_OMPR 0x900
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#define CSR_OPCR(i) (0x904 + (i) * 4)
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#define CSR_IMPR 0x980
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#define CSR_IPCR(i) (0x984 + (i) * 4)
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#define CSR_FCP_COMMAND 0xB00
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#define CSR_FCP_RESPONSE 0xD00
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#define CSR_FCP_END 0xF00
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#define CSR_TOPOLOGY_MAP 0x1000
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#define CSR_TOPOLOGY_MAP_END 0x1400
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#define CSR_SPEED_MAP 0x2000
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#define CSR_SPEED_MAP_END 0x3000
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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_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_DIRECTORY_ID 0x20
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struct fw_csr_iterator {
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const u32 *p;
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const u32 *end;
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};
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void fw_csr_iterator_init(struct fw_csr_iterator *ci, const u32 *p);
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int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value);
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int fw_csr_string(const u32 *directory, int key, char *buf, size_t size);
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extern struct bus_type fw_bus_type;
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struct fw_card_driver;
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struct fw_node;
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struct fw_card {
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const struct fw_card_driver *driver;
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struct device *device;
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struct kref kref;
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struct completion done;
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int node_id;
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int generation;
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int current_tlabel;
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u64 tlabel_mask;
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struct list_head transaction_list;
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u64 reset_jiffies;
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u32 split_timeout_hi;
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u32 split_timeout_lo;
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unsigned int split_timeout_cycles;
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unsigned int split_timeout_jiffies;
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unsigned long long guid;
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unsigned max_receive;
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int link_speed;
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int config_rom_generation;
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spinlock_t lock; /* Take this lock when handling the lists in
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* this struct. */
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struct fw_node *local_node;
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struct fw_node *root_node;
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struct fw_node *irm_node;
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u8 color; /* must be u8 to match the definition in struct fw_node */
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int gap_count;
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bool beta_repeaters_present;
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int index;
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struct list_head link;
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struct list_head phy_receiver_list;
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struct delayed_work br_work; /* bus reset job */
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bool br_short;
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struct delayed_work bm_work; /* bus manager job */
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int bm_retries;
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int bm_generation;
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int bm_node_id;
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bool bm_abdicate;
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bool priority_budget_implemented; /* controller feature */
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bool broadcast_channel_auto_allocated; /* controller feature */
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bool broadcast_channel_allocated;
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u32 broadcast_channel;
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__be32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];
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__be32 maint_utility_register;
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};
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static inline struct fw_card *fw_card_get(struct fw_card *card)
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{
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kref_get(&card->kref);
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return card;
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}
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void fw_card_release(struct kref *kref);
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static inline void fw_card_put(struct fw_card *card)
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{
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kref_put(&card->kref, fw_card_release);
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}
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int fw_card_read_cycle_time(struct fw_card *card, u32 *cycle_time);
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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[13];
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};
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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_GONE,
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FW_DEVICE_SHUTDOWN,
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};
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/*
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* Note, fw_device.generation always has to be read before fw_device.node_id.
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* Use SMP memory barriers to ensure this. Otherwise requests will be sent
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* to an outdated node_id if the generation was updated in the meantime due
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* to a bus reset.
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*
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* Likewise, fw-core will take care to update .node_id before .generation so
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* that whenever fw_device.generation is current WRT the actual bus generation,
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* fw_device.node_id is guaranteed to be current too.
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*
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* The same applies to fw_device.card->node_id vs. fw_device.generation.
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*
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* fw_device.config_rom and fw_device.config_rom_length may be accessed during
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* the lifetime of any fw_unit belonging to the fw_device, before device_del()
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* was called on the last fw_unit. Alternatively, they may be accessed while
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* holding fw_device_rwsem.
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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 mutex client_list_mutex;
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struct list_head client_list;
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const u32 *config_rom;
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size_t config_rom_length;
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int config_rom_retries;
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unsigned is_local:1;
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unsigned max_rec:4;
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unsigned cmc:1;
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unsigned irmc:1;
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unsigned bc_implemented:2;
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work_func_t workfn;
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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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#define fw_device(dev) container_of_const(dev, struct fw_device, device)
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static inline int 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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int fw_device_enable_phys_dma(struct fw_device *device);
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/*
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* fw_unit.directory must not be accessed after device_del(&fw_unit.device).
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*/
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struct fw_unit {
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struct device device;
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const u32 *directory;
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struct fw_attribute_group attribute_group;
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};
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#define fw_unit(dev) container_of_const(dev, struct fw_unit, device)
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static inline struct fw_unit *fw_unit_get(struct fw_unit *unit)
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{
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get_device(&unit->device);
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return unit;
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}
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static inline void fw_unit_put(struct fw_unit *unit)
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{
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put_device(&unit->device);
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}
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#define fw_parent_device(unit) fw_device(unit->device.parent)
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struct ieee1394_device_id;
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struct fw_driver {
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struct device_driver driver;
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int (*probe)(struct fw_unit *unit, const struct ieee1394_device_id *id);
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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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void (*remove)(struct fw_unit *unit);
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const struct ieee1394_device_id *id_table;
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};
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struct fw_packet;
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struct fw_request;
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typedef void (*fw_packet_callback_t)(struct fw_packet *packet,
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struct fw_card *card, int status);
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typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode,
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void *data, size_t length,
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void *callback_data);
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typedef void (*fw_transaction_callback_with_tstamp_t)(struct fw_card *card, int rcode,
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u32 request_tstamp, u32 response_tstamp, void *data,
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size_t length, void *callback_data);
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union fw_transaction_callback {
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fw_transaction_callback_t without_tstamp;
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fw_transaction_callback_with_tstamp_t with_tstamp;
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};
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/*
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* This callback handles an inbound request subaction. It is called in
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* RCU read-side context, therefore must not sleep.
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*
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* The callback should not initiate outbound request subactions directly.
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* Otherwise there is a danger of recursion of inbound and outbound
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* transactions from and to the local node.
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*
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* The callback is responsible that fw_send_response() is called on the @request, except for FCP
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* registers for which the core takes care of that.
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*/
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typedef void (*fw_address_callback_t)(struct fw_card *card,
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struct fw_request *request,
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int tcode, int destination, int source,
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int generation,
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unsigned long long offset,
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void *data, size_t length,
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void *callback_data);
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struct fw_packet {
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int speed;
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int generation;
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u32 header[4];
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size_t header_length;
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void *payload;
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size_t payload_length;
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dma_addr_t payload_bus;
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bool payload_mapped;
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u32 timestamp;
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/*
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* This callback is called when the packet transmission has completed.
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* For successful transmission, the status code is the ack received
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* from the destination. Otherwise it is one of the juju-specific
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* rcodes: RCODE_SEND_ERROR, _CANCELLED, _BUSY, _GENERATION, _NO_ACK.
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* The callback can be called from tasklet context and thus
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* must never block.
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*/
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fw_packet_callback_t callback;
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int ack;
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struct list_head link;
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void *driver_data;
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};
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struct fw_transaction {
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int node_id; /* The generation is implied; it is always the current. */
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int tlabel;
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struct list_head link;
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struct fw_card *card;
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bool is_split_transaction;
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struct timer_list split_timeout_timer;
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u32 split_timeout_cycle;
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struct fw_packet packet;
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/*
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* The data passed to the callback is valid only during the
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* callback.
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*/
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union fw_transaction_callback callback;
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bool with_tstamp;
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void *callback_data;
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};
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struct fw_address_handler {
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u64 offset;
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u64 length;
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fw_address_callback_t address_callback;
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void *callback_data;
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struct list_head link;
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};
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struct fw_address_region {
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u64 start;
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u64 end;
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};
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extern const struct fw_address_region fw_high_memory_region;
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int fw_core_add_address_handler(struct fw_address_handler *handler,
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const struct fw_address_region *region);
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void fw_core_remove_address_handler(struct fw_address_handler *handler);
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void fw_send_response(struct fw_card *card,
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struct fw_request *request, int rcode);
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int fw_get_request_speed(struct fw_request *request);
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u32 fw_request_get_timestamp(const struct fw_request *request);
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void __fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode,
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int destination_id, int generation, int speed, unsigned long long offset,
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void *payload, size_t length, union fw_transaction_callback callback,
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bool with_tstamp, void *callback_data);
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/**
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* fw_send_request() - submit a request packet for transmission to generate callback for response
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* subaction without time stamp.
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* @card: interface to send the request at
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* @t: transaction instance to which the request belongs
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* @tcode: transaction code
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* @destination_id: destination node ID, consisting of bus_ID and phy_ID
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* @generation: bus generation in which request and response are valid
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* @speed: transmission speed
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* @offset: 48bit wide offset into destination's address space
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* @payload: data payload for the request subaction
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* @length: length of the payload, in bytes
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* @callback: function to be called when the transaction is completed
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* @callback_data: data to be passed to the transaction completion callback
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*
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* A variation of __fw_send_request() to generate callback for response subaction without time
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* stamp.
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*/
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static inline void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode,
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int destination_id, int generation, int speed,
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unsigned long long offset, void *payload, size_t length,
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fw_transaction_callback_t callback, void *callback_data)
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{
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union fw_transaction_callback cb = {
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.without_tstamp = callback,
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};
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__fw_send_request(card, t, tcode, destination_id, generation, speed, offset, payload,
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length, cb, false, callback_data);
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}
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/**
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* fw_send_request_with_tstamp() - submit a request packet for transmission to generate callback for
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* response with time stamp.
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* @card: interface to send the request at
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* @t: transaction instance to which the request belongs
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* @tcode: transaction code
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* @destination_id: destination node ID, consisting of bus_ID and phy_ID
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* @generation: bus generation in which request and response are valid
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* @speed: transmission speed
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* @offset: 48bit wide offset into destination's address space
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* @payload: data payload for the request subaction
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* @length: length of the payload, in bytes
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* @callback: function to be called when the transaction is completed
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* @callback_data: data to be passed to the transaction completion callback
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*
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* A variation of __fw_send_request() to generate callback for response subaction with time stamp.
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*/
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static inline void fw_send_request_with_tstamp(struct fw_card *card, struct fw_transaction *t,
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int tcode, int destination_id, int generation, int speed, unsigned long long offset,
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void *payload, size_t length, fw_transaction_callback_with_tstamp_t callback,
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void *callback_data)
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{
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union fw_transaction_callback cb = {
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.with_tstamp = callback,
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};
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__fw_send_request(card, t, tcode, destination_id, generation, speed, offset, payload,
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length, cb, true, callback_data);
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}
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int fw_cancel_transaction(struct fw_card *card,
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struct fw_transaction *transaction);
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int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
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int generation, int speed, unsigned long long offset,
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void *payload, size_t length);
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const char *fw_rcode_string(int rcode);
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static inline int fw_stream_packet_destination_id(int tag, int channel, int sy)
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{
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return tag << 14 | channel << 8 | sy;
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}
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void fw_schedule_bus_reset(struct fw_card *card, bool delayed,
|
|
bool short_reset);
|
|
|
|
struct fw_descriptor {
|
|
struct list_head link;
|
|
size_t length;
|
|
u32 immediate;
|
|
u32 key;
|
|
const u32 *data;
|
|
};
|
|
|
|
int fw_core_add_descriptor(struct fw_descriptor *desc);
|
|
void fw_core_remove_descriptor(struct fw_descriptor *desc);
|
|
|
|
/*
|
|
* The iso packet format allows for an immediate header/payload part
|
|
* stored in 'header' immediately after the packet info plus an
|
|
* indirect payload part that is pointer to by the 'payload' field.
|
|
* Applications can use one or the other or both to implement simple
|
|
* low-bandwidth streaming (e.g. audio) or more advanced
|
|
* scatter-gather streaming (e.g. assembling video frame automatically).
|
|
*/
|
|
struct fw_iso_packet {
|
|
u16 payload_length; /* Length of indirect payload */
|
|
u32 interrupt:1; /* Generate interrupt on this packet */
|
|
u32 skip:1; /* tx: Set to not send packet at all */
|
|
/* rx: Sync bit, wait for matching sy */
|
|
u32 tag:2; /* tx: Tag in packet header */
|
|
u32 sy:4; /* tx: Sy in packet header */
|
|
u32 header_length:8; /* Length of immediate header */
|
|
u32 header[]; /* tx: Top of 1394 isoch. data_block */
|
|
};
|
|
|
|
#define FW_ISO_CONTEXT_TRANSMIT 0
|
|
#define FW_ISO_CONTEXT_RECEIVE 1
|
|
#define FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL 2
|
|
|
|
#define FW_ISO_CONTEXT_MATCH_TAG0 1
|
|
#define FW_ISO_CONTEXT_MATCH_TAG1 2
|
|
#define FW_ISO_CONTEXT_MATCH_TAG2 4
|
|
#define FW_ISO_CONTEXT_MATCH_TAG3 8
|
|
#define FW_ISO_CONTEXT_MATCH_ALL_TAGS 15
|
|
|
|
/*
|
|
* An iso buffer is just a set of pages mapped for DMA in the
|
|
* specified direction. Since the pages are to be used for DMA, they
|
|
* are not mapped into the kernel virtual address space. We store the
|
|
* DMA address in the page private. The helper function
|
|
* fw_iso_buffer_map() will map the pages into a given vma.
|
|
*/
|
|
struct fw_iso_buffer {
|
|
enum dma_data_direction direction;
|
|
struct page **pages;
|
|
int page_count;
|
|
int page_count_mapped;
|
|
};
|
|
|
|
int fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
|
|
int page_count, enum dma_data_direction direction);
|
|
void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer, struct fw_card *card);
|
|
size_t fw_iso_buffer_lookup(struct fw_iso_buffer *buffer, dma_addr_t completed);
|
|
|
|
struct fw_iso_context;
|
|
typedef void (*fw_iso_callback_t)(struct fw_iso_context *context,
|
|
u32 cycle, size_t header_length,
|
|
void *header, void *data);
|
|
typedef void (*fw_iso_mc_callback_t)(struct fw_iso_context *context,
|
|
dma_addr_t completed, void *data);
|
|
|
|
union fw_iso_callback {
|
|
fw_iso_callback_t sc;
|
|
fw_iso_mc_callback_t mc;
|
|
};
|
|
|
|
struct fw_iso_context {
|
|
struct fw_card *card;
|
|
int type;
|
|
int channel;
|
|
int speed;
|
|
bool drop_overflow_headers;
|
|
size_t header_size;
|
|
union fw_iso_callback callback;
|
|
void *callback_data;
|
|
};
|
|
|
|
struct fw_iso_context *fw_iso_context_create(struct fw_card *card,
|
|
int type, int channel, int speed, size_t header_size,
|
|
fw_iso_callback_t callback, void *callback_data);
|
|
int fw_iso_context_set_channels(struct fw_iso_context *ctx, u64 *channels);
|
|
int fw_iso_context_queue(struct fw_iso_context *ctx,
|
|
struct fw_iso_packet *packet,
|
|
struct fw_iso_buffer *buffer,
|
|
unsigned long payload);
|
|
void fw_iso_context_queue_flush(struct fw_iso_context *ctx);
|
|
int fw_iso_context_flush_completions(struct fw_iso_context *ctx);
|
|
int fw_iso_context_start(struct fw_iso_context *ctx,
|
|
int cycle, int sync, int tags);
|
|
int fw_iso_context_stop(struct fw_iso_context *ctx);
|
|
void fw_iso_context_destroy(struct fw_iso_context *ctx);
|
|
void fw_iso_resource_manage(struct fw_card *card, int generation,
|
|
u64 channels_mask, int *channel, int *bandwidth,
|
|
bool allocate);
|
|
|
|
extern struct workqueue_struct *fw_workqueue;
|
|
|
|
#endif /* _LINUX_FIREWIRE_H */
|