mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 18:00:53 +07:00
e91b2787d0
On OHCI 1.1 controllers, let the hardware allocate the broadcast channel automatically. This removes a theoretical race condition directly after a bus reset where it could be possible to read the channel allocation register with channel 31 still being unallocated. Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
237 lines
6.5 KiB
C
237 lines
6.5 KiB
C
#ifndef _FIREWIRE_CORE_H
|
|
#define _FIREWIRE_CORE_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 <asm/atomic.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 */
|
|
|
|
/* 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 FEATURE_PRIORITY_BUDGET 0x01
|
|
#define FEATURE_CHANNEL_31_ALLOCATED 0x02
|
|
|
|
#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 (*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_reg)(struct fw_card *card, int csr_offset);
|
|
void (*write_csr_reg)(struct fw_card *card, int csr_offset, u32 value);
|
|
|
|
unsigned int (*get_features)(struct fw_card *card);
|
|
|
|
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 (*queue_iso)(struct fw_iso_context *ctx,
|
|
struct fw_iso_packet *packet,
|
|
struct fw_iso_buffer *buffer,
|
|
unsigned long payload);
|
|
|
|
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_core_initiate_bus_reset(struct fw_card *card, int short_reset);
|
|
int fw_compute_block_crc(__be32 *block);
|
|
void fw_schedule_bm_work(struct fw_card *card, unsigned long delay);
|
|
|
|
static inline struct fw_card *fw_card_get(struct fw_card *card)
|
|
{
|
|
kref_get(&card->kref);
|
|
|
|
return card;
|
|
}
|
|
|
|
void fw_card_release(struct kref *kref);
|
|
|
|
static inline void fw_card_put(struct fw_card *card)
|
|
{
|
|
kref_put(&card->kref, fw_card_release);
|
|
}
|
|
|
|
|
|
/* -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);
|
|
|
|
|
|
/* -device */
|
|
|
|
extern struct rw_semaphore fw_device_rwsem;
|
|
extern struct idr fw_device_idr;
|
|
extern int fw_cdev_major;
|
|
|
|
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_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma);
|
|
void fw_iso_resource_manage(struct fw_card *card, int generation,
|
|
u64 channels_mask, int *channel, int *bandwidth,
|
|
bool allocate, __be32 buffer[2]);
|
|
|
|
|
|
/* -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 */
|
|
atomic_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)
|
|
{
|
|
atomic_inc(&node->ref_count);
|
|
|
|
return node;
|
|
}
|
|
|
|
static inline void fw_node_put(struct fw_node *node)
|
|
{
|
|
if (atomic_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);
|
|
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_IS_READ_REQUEST(tcode) (((tcode) & ~1) == 4)
|
|
#define TCODE_IS_BLOCK_PACKET(tcode) (((tcode) & 1) != 0)
|
|
#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
|
|
|
|
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);
|
|
void fw_send_phy_config(struct fw_card *card,
|
|
int node_id, int generation, int gap_count);
|
|
|
|
#endif /* _FIREWIRE_CORE_H */
|