| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Stefan Richter | 771 | 68.29% | 19 | 47.50% |
| Kristian Högsberg | 239 | 21.17% | 7 | 17.50% |
| Clemens Ladisch | 86 | 7.62% | 10 | 25.00% |
| Marc Butler | 16 | 1.42% | 1 | 2.50% |
| Jay Fenlason, Stefan Richter | 12 | 1.06% | 1 | 2.50% |
| Elena Reshetova | 4 | 0.35% | 1 | 2.50% |
| Greg Kroah-Hartman | 1 | 0.09% | 1 | 2.50% |
| Total | 1129 | 40 |
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _FIREWIRE_CORE_H #define _FIREWIRE_CORE_H #include <linux/compiler.h> #include <linux/device.h> #include <linux/dma-mapping.h> #include <linux/fs.h> #include <linux/list.h> #include <linux/idr.h> #include <linux/mm_types.h> #include <linux/rwsem.h> #include <linux/slab.h> #include <linux/types.h> #include <linux/refcount.h> struct device; struct fw_card; struct fw_device; struct fw_iso_buffer; struct fw_iso_context; struct fw_iso_packet; struct fw_node; struct fw_packet; /* -card */ extern __printf(2, 3) void fw_err(const struct fw_card *card, const char *fmt, ...); extern __printf(2, 3) void fw_notice(const struct fw_card *card, const char *fmt, ...); /* bitfields within the PHY registers */ #define PHY_LINK_ACTIVE 0x80 #define PHY_CONTENDER 0x40 #define PHY_BUS_RESET 0x40 #define PHY_EXTENDED_REGISTERS 0xe0 #define PHY_BUS_SHORT_RESET 0x40 #define PHY_INT_STATUS_BITS 0x3c #define PHY_ENABLE_ACCEL 0x02 #define PHY_ENABLE_MULTI 0x01 #define PHY_PAGE_SELECT 0xe0 #define BANDWIDTH_AVAILABLE_INITIAL 4915 #define BROADCAST_CHANNEL_INITIAL (1 << 31 | 31) #define BROADCAST_CHANNEL_VALID (1 << 30) #define CSR_STATE_BIT_CMSTR (1 << 8) #define CSR_STATE_BIT_ABDICATE (1 << 10) struct fw_card_driver { /* * Enable the given card with the given initial config rom. * This function is expected to activate the card, and either * enable the PHY or set the link_on bit and initiate a bus * reset. */ int (*enable)(struct fw_card *card, const __be32 *config_rom, size_t length); int (*read_phy_reg)(struct fw_card *card, int address); int (*update_phy_reg)(struct fw_card *card, int address, int clear_bits, int set_bits); /* * Update the config rom for an enabled card. This function * should change the config rom that is presented on the bus * and initiate a bus reset. */ int (*set_config_rom)(struct fw_card *card, const __be32 *config_rom, size_t length); void (*send_request)(struct fw_card *card, struct fw_packet *packet); void (*send_response)(struct fw_card *card, struct fw_packet *packet); /* Calling cancel is valid once a packet has been submitted. */ int (*cancel_packet)(struct fw_card *card, struct fw_packet *packet); /* * Allow the specified node ID to do direct DMA out and in of * host memory. The card will disable this for all node when * a bus reset happens, so driver need to reenable this after * bus reset. Returns 0 on success, -ENODEV if the card * doesn't support this, -ESTALE if the generation doesn't * match. */ int (*enable_phys_dma)(struct fw_card *card, int node_id, int generation); u32 (*read_csr)(struct fw_card *card, int csr_offset); void (*write_csr)(struct fw_card *card, int csr_offset, u32 value); struct fw_iso_context * (*allocate_iso_context)(struct fw_card *card, int type, int channel, size_t header_size); void (*free_iso_context)(struct fw_iso_context *ctx); int (*start_iso)(struct fw_iso_context *ctx, s32 cycle, u32 sync, u32 tags); int (*set_iso_channels)(struct fw_iso_context *ctx, u64 *channels); int (*queue_iso)(struct fw_iso_context *ctx, struct fw_iso_packet *packet, struct fw_iso_buffer *buffer, unsigned long payload); void (*flush_queue_iso)(struct fw_iso_context *ctx); int (*flush_iso_completions)(struct fw_iso_context *ctx); int (*stop_iso)(struct fw_iso_context *ctx); }; void fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver, struct device *device); int fw_card_add(struct fw_card *card, u32 max_receive, u32 link_speed, u64 guid); void fw_core_remove_card(struct fw_card *card); int fw_compute_block_crc(__be32 *block); void fw_schedule_bm_work(struct fw_card *card, unsigned long delay); /* -cdev */ extern const struct file_operations fw_device_ops; void fw_device_cdev_update(struct fw_device *device); void fw_device_cdev_remove(struct fw_device *device); void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p); /* -device */ extern struct rw_semaphore fw_device_rwsem; extern struct idr fw_device_idr; extern int fw_cdev_major; static inline struct fw_device *fw_device_get(struct fw_device *device) { get_device(&device->device); return device; } static inline void fw_device_put(struct fw_device *device) { put_device(&device->device); } struct fw_device *fw_device_get_by_devt(dev_t devt); int fw_device_set_broadcast_channel(struct device *dev, void *gen); void fw_node_event(struct fw_card *card, struct fw_node *node, int event); /* -iso */ int fw_iso_buffer_alloc(struct fw_iso_buffer *buffer, int page_count); int fw_iso_buffer_map_dma(struct fw_iso_buffer *buffer, struct fw_card *card, enum dma_data_direction direction); int fw_iso_buffer_map_vma(struct fw_iso_buffer *buffer, struct vm_area_struct *vma); /* -topology */ enum { FW_NODE_CREATED, FW_NODE_UPDATED, FW_NODE_DESTROYED, FW_NODE_LINK_ON, FW_NODE_LINK_OFF, FW_NODE_INITIATED_RESET, }; struct fw_node { u16 node_id; u8 color; u8 port_count; u8 link_on:1; u8 initiated_reset:1; u8 b_path:1; u8 phy_speed:2; /* As in the self ID packet. */ u8 max_speed:2; /* Minimum of all phy-speeds on the path from the * local node to this node. */ u8 max_depth:4; /* Maximum depth to any leaf node */ u8 max_hops:4; /* Max hops in this sub tree */ refcount_t ref_count; /* For serializing node topology into a list. */ struct list_head link; /* Upper layer specific data. */ void *data; struct fw_node *ports[0]; }; static inline struct fw_node *fw_node_get(struct fw_node *node) { refcount_inc(&node->ref_count); return node; } static inline void fw_node_put(struct fw_node *node) { if (refcount_dec_and_test(&node->ref_count)) kfree(node); } void fw_core_handle_bus_reset(struct fw_card *card, int node_id, int generation, int self_id_count, u32 *self_ids, bool bm_abdicate); void fw_destroy_nodes(struct fw_card *card); /* * Check whether new_generation is the immediate successor of old_generation. * Take counter roll-over at 255 (as per OHCI) into account. */ static inline bool is_next_generation(int new_generation, int old_generation) { return (new_generation & 0xff) == ((old_generation + 1) & 0xff); } /* -transaction */ #define TCODE_LINK_INTERNAL 0xe #define TCODE_IS_READ_REQUEST(tcode) (((tcode) & ~1) == 4) #define TCODE_IS_BLOCK_PACKET(tcode) (((tcode) & 1) != 0) #define TCODE_IS_LINK_INTERNAL(tcode) ((tcode) == TCODE_LINK_INTERNAL) #define TCODE_IS_REQUEST(tcode) (((tcode) & 2) == 0) #define TCODE_IS_RESPONSE(tcode) (((tcode) & 2) != 0) #define TCODE_HAS_REQUEST_DATA(tcode) (((tcode) & 12) != 4) #define TCODE_HAS_RESPONSE_DATA(tcode) (((tcode) & 12) != 0) #define LOCAL_BUS 0xffc0 /* OHCI-1394's default upper bound for physical DMA: 4 GB */ #define FW_MAX_PHYSICAL_RANGE (1ULL << 32) void fw_core_handle_request(struct fw_card *card, struct fw_packet *request); void fw_core_handle_response(struct fw_card *card, struct fw_packet *packet); int fw_get_response_length(struct fw_request *request); void fw_fill_response(struct fw_packet *response, u32 *request_header, int rcode, void *payload, size_t length); #define FW_PHY_CONFIG_NO_NODE_ID -1 #define FW_PHY_CONFIG_CURRENT_GAP_COUNT -1 void fw_send_phy_config(struct fw_card *card, int node_id, int generation, int gap_count); static inline bool is_ping_packet(u32 *data) { return (data[0] & 0xc0ffffff) == 0 && ~data[0] == data[1]; } #endif /* _FIREWIRE_CORE_H */
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