diff options
Diffstat (limited to 'drivers/staging/fwserial/fwserial.h')
| -rw-r--r-- | drivers/staging/fwserial/fwserial.h | 52 |
1 files changed, 17 insertions, 35 deletions
diff --git a/drivers/staging/fwserial/fwserial.h b/drivers/staging/fwserial/fwserial.h index caa1c1ea82d..98b853d4acb 100644 --- a/drivers/staging/fwserial/fwserial.h +++ b/drivers/staging/fwserial/fwserial.h @@ -15,20 +15,21 @@ #include <linux/serial_reg.h> #include <linux/module.h> #include <linux/seq_file.h> +#include <linux/debugfs.h> #include "dma_fifo.h" #ifdef FWTTY_PROFILING #define DISTRIBUTION_MAX_SIZE 8192 #define DISTRIBUTION_MAX_INDEX (ilog2(DISTRIBUTION_MAX_SIZE) + 1) -static inline void profile_size_distrib(unsigned stat[], unsigned val) +static inline void fwtty_profile_data(unsigned stat[], unsigned val) { int n = (val) ? min(ilog2(val) + 1, DISTRIBUTION_MAX_INDEX) : 0; ++stat[n]; } #else #define DISTRIBUTION_MAX_INDEX 0 -#define profile_size_distrib(st, n) +#define fwtty_profile_data(st, n) #endif /* Parameters for both VIRT_CABLE_PLUG & VIRT_CABLE_PLUG_RSP mgmt codes */ @@ -90,6 +91,7 @@ struct fwtty_peer { struct rcu_head rcu; spinlock_t lock; + work_func_t workfn; struct work_struct work; struct peer_work_params work_params; struct timer_list timer; @@ -165,7 +167,6 @@ struct stats { unsigned sent; unsigned lost; unsigned throttled; - unsigned watermark; unsigned reads[DISTRIBUTION_MAX_INDEX + 1]; unsigned writes[DISTRIBUTION_MAX_INDEX + 1]; unsigned txns[DISTRIBUTION_MAX_INDEX + 1]; @@ -182,18 +183,12 @@ struct fwconsole_ops { #define FWCON_NOTIFY_ATTACH 1 #define FWCON_NOTIFY_DETACH 2 -struct buffered_rx { - struct list_head list; - size_t n; - unsigned char data[0]; -}; - /** * fwtty_port: structure used to track/represent underlying tty_port * @port: underlying tty_port * @device: tty device * @index: index into port_table for this particular port - * note: minor = index + FWSERIAL_TTY_START_MINOR + * note: minor = index + minor_start assigned by tty_alloc_driver() * @serial: back pointer to the containing fw_serial * @rx_handler: bus address handler for unique addr region used by remotes * to communicate with this port. Every port uses @@ -222,11 +217,6 @@ struct buffered_rx { * The work can race with the writer but concurrent sending is * prevented with the IN_TX flag. Scheduled under lock to * limit scheduling when fifo has just been drained. - * @push: work responsible for pushing buffered rx to the ldisc. - * rx can become buffered if the tty buffer is filled before the - * ldisc throttles the sender. - * @buf_list: list of buffered rx yet to be sent to ldisc - * @buffered: byte count of buffered rx * @tx_fifo: fifo used to store & block-up writes for dma to remote * @max_payload: max bytes transmissable per dma (based on peer's max_payload) * @status_mask: UART_LSR_* bitmask significant to rx (based on termios) @@ -266,9 +256,6 @@ struct fwtty_port { spinlock_t lock; unsigned mctrl; struct delayed_work drain; - struct work_struct push; - struct list_head buf_list; - int buffered; struct dma_fifo tx_fifo; int max_payload; unsigned status_mask; @@ -279,7 +266,7 @@ struct fwtty_port { loopback:1; unsigned long flags; - struct fwtty_peer *peer; + struct fwtty_peer __rcu *peer; struct async_icount icount; struct stats stats; @@ -290,7 +277,6 @@ struct fwtty_port { /* bit #s for flags field */ #define IN_TX 0 #define STOP_TX 1 -#define BUFFERING_RX 2 /* bitmasks for special mctrl/mstatus bits */ #define OOB_RX_THROTTLE 0x00010000 @@ -306,8 +292,8 @@ struct fwtty_port { #define FREQ_BREAKS (HZ / 50) /* Ports are allocated in blocks of num_ports for each fw_card */ -#define MAX_CARD_PORTS 32 /* max # of ports per card */ -#define MAX_TOTAL_PORTS 64 /* max # of ports total */ +#define MAX_CARD_PORTS CONFIG_FWTTY_MAX_CARD_PORTS +#define MAX_TOTAL_PORTS CONFIG_FWTTY_MAX_TOTAL_PORTS /* tuning parameters */ #define FWTTY_PORT_TXFIFO_LEN 4096 @@ -338,6 +324,7 @@ struct fw_serial { struct fw_card *card; struct kref kref; + struct dentry *debugfs; struct fwtty_peer *self; struct list_head list; @@ -351,11 +338,8 @@ struct fw_serial { #define TTY_DEV_NAME "fwtty" /* ttyFW was taken */ static const char tty_dev_name[] = TTY_DEV_NAME; static const char loop_dev_name[] = "fwloop"; -extern bool limit_bw; - -struct tty_driver *fwtty_driver; -#define driver_err(s, v...) pr_err(KBUILD_MODNAME ": " s, ##v) +extern struct tty_driver *fwtty_driver; struct fwtty_port *fwtty_port_get(unsigned index); void fwtty_port_put(struct fwtty_port *port); @@ -370,18 +354,16 @@ static inline void fwtty_bind_console(struct fwtty_port *port, /* * Returns the max send async payload size in bytes based on the unit device - * link speed - if set to limit bandwidth to max 20%, use lookup table + * link speed. Self-limiting asynchronous bandwidth (via reducing the payload) + * is not necessary and does not work, because + * 1) asynchronous traffic will absorb all available bandwidth (less that + * being used for isochronous traffic) + * 2) isochronous arbitration always wins. */ static inline int link_speed_to_max_payload(unsigned speed) { - static const int max_async[] = { 307, 614, 1229, 2458, }; - BUILD_BUG_ON(ARRAY_SIZE(max_async) - 1 != SCODE_800); - - speed = clamp(speed, (unsigned) SCODE_100, (unsigned) SCODE_800); - if (limit_bw) - return max_async[speed]; - else - return 1 << (speed + 9); + /* Max async payload is 4096 - see IEEE 1394-2008 tables 6-4, 16-18 */ + return min(512 << speed, 4096); } #endif /* _FIREWIRE_FWSERIAL_H */ |