diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-trans.h')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-trans.h | 885 |
1 files changed, 702 insertions, 183 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h index e6bf3f55477..34d49e171fb 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans.h +++ b/drivers/net/wireless/iwlwifi/iwl-trans.h @@ -5,7 +5,7 @@ * * GPL LICENSE SUMMARY * - * Copyright(c) 2007 - 2011 Intel Corporation. All rights reserved. + * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as @@ -22,7 +22,7 @@ * USA * * The full GNU General Public License is included in this distribution - * in the file called LICENSE.GPL. + * in the file called COPYING. * * Contact Information: * Intel Linux Wireless <ilw@linux.intel.com> @@ -30,7 +30,7 @@ * * BSD LICENSE * - * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved. + * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -63,27 +63,151 @@ #ifndef __iwl_trans_h__ #define __iwl_trans_h__ -#include <linux/debugfs.h> -#include <linux/skbuff.h> +#include <linux/ieee80211.h> +#include <linux/mm.h> /* for page_address */ +#include <linux/lockdep.h> -#include "iwl-shared.h" -#include "iwl-commands.h" +#include "iwl-debug.h" +#include "iwl-config.h" +#include "iwl-fw.h" +#include "iwl-op-mode.h" - /*This file includes the declaration that are exported from the transport - * layer */ +/** + * DOC: Transport layer - what is it ? + * + * The tranport layer is the layer that deals with the HW directly. It provides + * an abstraction of the underlying HW to the upper layer. The transport layer + * doesn't provide any policy, algorithm or anything of this kind, but only + * mechanisms to make the HW do something.It is not completely stateless but + * close to it. + * We will have an implementation for each different supported bus. + */ + +/** + * DOC: Life cycle of the transport layer + * + * The transport layer has a very precise life cycle. + * + * 1) A helper function is called during the module initialization and + * registers the bus driver's ops with the transport's alloc function. + * 2) Bus's probe calls to the transport layer's allocation functions. + * Of course this function is bus specific. + * 3) This allocation functions will spawn the upper layer which will + * register mac80211. + * + * 4) At some point (i.e. mac80211's start call), the op_mode will call + * the following sequence: + * start_hw + * start_fw + * + * 5) Then when finished (or reset): + * stop_device + * + * 6) Eventually, the free function will be called. + */ + +/** + * DOC: Host command section + * + * A host command is a commaned issued by the upper layer to the fw. There are + * several versions of fw that have several APIs. The transport layer is + * completely agnostic to these differences. + * The transport does provide helper functionnality (i.e. SYNC / ASYNC mode), + */ +#define SEQ_TO_QUEUE(s) (((s) >> 8) & 0x1f) +#define QUEUE_TO_SEQ(q) (((q) & 0x1f) << 8) +#define SEQ_TO_INDEX(s) ((s) & 0xff) +#define INDEX_TO_SEQ(i) ((i) & 0xff) +#define SEQ_RX_FRAME cpu_to_le16(0x8000) + +/** + * struct iwl_cmd_header + * + * This header format appears in the beginning of each command sent from the + * driver, and each response/notification received from uCode. + */ +struct iwl_cmd_header { + u8 cmd; /* Command ID: REPLY_RXON, etc. */ + u8 flags; /* 0:5 reserved, 6 abort, 7 internal */ + /* + * The driver sets up the sequence number to values of its choosing. + * uCode does not use this value, but passes it back to the driver + * when sending the response to each driver-originated command, so + * the driver can match the response to the command. Since the values + * don't get used by uCode, the driver may set up an arbitrary format. + * + * There is one exception: uCode sets bit 15 when it originates + * the response/notification, i.e. when the response/notification + * is not a direct response to a command sent by the driver. For + * example, uCode issues REPLY_RX when it sends a received frame + * to the driver; it is not a direct response to any driver command. + * + * The Linux driver uses the following format: + * + * 0:7 tfd index - position within TX queue + * 8:12 TX queue id + * 13:14 reserved + * 15 unsolicited RX or uCode-originated notification + */ + __le16 sequence; +} __packed; + +/* iwl_cmd_header flags value */ +#define IWL_CMD_FAILED_MSK 0x40 + + +#define FH_RSCSR_FRAME_SIZE_MSK 0x00003FFF /* bits 0-13 */ +#define FH_RSCSR_FRAME_INVALID 0x55550000 +#define FH_RSCSR_FRAME_ALIGN 0x40 + +struct iwl_rx_packet { + /* + * The first 4 bytes of the RX frame header contain both the RX frame + * size and some flags. + * Bit fields: + * 31: flag flush RB request + * 30: flag ignore TC (terminal counter) request + * 29: flag fast IRQ request + * 28-14: Reserved + * 13-00: RX frame size + */ + __le32 len_n_flags; + struct iwl_cmd_header hdr; + u8 data[]; +} __packed; -struct iwl_priv; -struct iwl_shared; +static inline u32 iwl_rx_packet_len(const struct iwl_rx_packet *pkt) +{ + return le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; +} -#define SEQ_TO_SN(seq) (((seq) & IEEE80211_SCTL_SEQ) >> 4) -#define SN_TO_SEQ(ssn) (((ssn) << 4) & IEEE80211_SCTL_SEQ) -#define MAX_SN ((IEEE80211_SCTL_SEQ) >> 4) +static inline u32 iwl_rx_packet_payload_len(const struct iwl_rx_packet *pkt) +{ + return iwl_rx_packet_len(pkt) - sizeof(pkt->hdr); +} -enum { - CMD_SYNC = 0, - CMD_ASYNC = BIT(0), - CMD_WANT_SKB = BIT(1), - CMD_ON_DEMAND = BIT(2), +/** + * enum CMD_MODE - how to send the host commands ? + * + * @CMD_ASYNC: Return right away and don't wait for the response + * @CMD_WANT_SKB: Not valid with CMD_ASYNC. The caller needs the buffer of + * the response. The caller needs to call iwl_free_resp when done. + * @CMD_HIGH_PRIO: The command is high priority - it goes to the front of the + * command queue, but after other high priority commands. valid only + * with CMD_ASYNC. + * @CMD_SEND_IN_IDLE: The command should be sent even when the trans is idle. + * @CMD_MAKE_TRANS_IDLE: The command response should mark the trans as idle. + * @CMD_WAKE_UP_TRANS: The command response should wake up the trans + * (i.e. mark it as non-idle). + */ +enum CMD_MODE { + CMD_ASYNC = BIT(0), + CMD_WANT_SKB = BIT(1), + CMD_SEND_IN_RFKILL = BIT(2), + CMD_HIGH_PRIO = BIT(3), + CMD_SEND_IN_IDLE = BIT(4), + CMD_MAKE_TRANS_IDLE = BIT(5), + CMD_WAKE_UP_TRANS = BIT(6), }; #define DEF_CMD_PAYLOAD_SIZE 320 @@ -102,296 +226,691 @@ struct iwl_device_cmd { #define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd)) -#define IWL_MAX_CMD_TFDS 2 +/* + * number of transfer buffers (fragments) per transmit frame descriptor; + * this is just the driver's idea, the hardware supports 20 + */ +#define IWL_MAX_CMD_TBS_PER_TFD 2 +/** + * struct iwl_hcmd_dataflag - flag for each one of the chunks of the command + * + * @IWL_HCMD_DFL_NOCOPY: By default, the command is copied to the host command's + * ring. The transport layer doesn't map the command's buffer to DMA, but + * rather copies it to a previously allocated DMA buffer. This flag tells + * the transport layer not to copy the command, but to map the existing + * buffer (that is passed in) instead. This saves the memcpy and allows + * commands that are bigger than the fixed buffer to be submitted. + * Note that a TFD entry after a NOCOPY one cannot be a normal copied one. + * @IWL_HCMD_DFL_DUP: Only valid without NOCOPY, duplicate the memory for this + * chunk internally and free it again after the command completes. This + * can (currently) be used only once per command. + * Note that a TFD entry after a DUP one cannot be a normal copied one. + */ enum iwl_hcmd_dataflag { IWL_HCMD_DFL_NOCOPY = BIT(0), + IWL_HCMD_DFL_DUP = BIT(1), }; /** * struct iwl_host_cmd - Host command to the uCode + * * @data: array of chunks that composes the data of the host command - * @reply_page: pointer to the page that holds the response to the host command + * @resp_pkt: response packet, if %CMD_WANT_SKB was set + * @_rx_page_order: (internally used to free response packet) + * @_rx_page_addr: (internally used to free response packet) * @handler_status: return value of the handler of the command * (put in setup_rx_handlers) - valid for SYNC mode only - * @callback: - * @flags: can be CMD_* note CMD_WANT_SKB is incompatible withe CMD_ASYNC - * @len: array of the lenths of the chunks in data - * @dataflags: + * @flags: can be CMD_* + * @len: array of the lengths of the chunks in data + * @dataflags: IWL_HCMD_DFL_* * @id: id of the host command */ struct iwl_host_cmd { - const void *data[IWL_MAX_CMD_TFDS]; - unsigned long reply_page; + const void *data[IWL_MAX_CMD_TBS_PER_TFD]; + struct iwl_rx_packet *resp_pkt; + unsigned long _rx_page_addr; + u32 _rx_page_order; int handler_status; u32 flags; - u16 len[IWL_MAX_CMD_TFDS]; - u8 dataflags[IWL_MAX_CMD_TFDS]; + u16 len[IWL_MAX_CMD_TBS_PER_TFD]; + u8 dataflags[IWL_MAX_CMD_TBS_PER_TFD]; u8 id; }; +static inline void iwl_free_resp(struct iwl_host_cmd *cmd) +{ + free_pages(cmd->_rx_page_addr, cmd->_rx_page_order); +} + +struct iwl_rx_cmd_buffer { + struct page *_page; + int _offset; + bool _page_stolen; + u32 _rx_page_order; + unsigned int truesize; +}; + +static inline void *rxb_addr(struct iwl_rx_cmd_buffer *r) +{ + return (void *)((unsigned long)page_address(r->_page) + r->_offset); +} + +static inline int rxb_offset(struct iwl_rx_cmd_buffer *r) +{ + return r->_offset; +} + +static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r) +{ + r->_page_stolen = true; + get_page(r->_page); + return r->_page; +} + +static inline void iwl_free_rxb(struct iwl_rx_cmd_buffer *r) +{ + __free_pages(r->_page, r->_rx_page_order); +} + +#define MAX_NO_RECLAIM_CMDS 6 + +#define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) + +/* + * Maximum number of HW queues the transport layer + * currently supports + */ +#define IWL_MAX_HW_QUEUES 32 +#define IWL_MAX_TID_COUNT 8 +#define IWL_FRAME_LIMIT 64 + +/** + * enum iwl_wowlan_status - WoWLAN image/device status + * @IWL_D3_STATUS_ALIVE: firmware is still running after resume + * @IWL_D3_STATUS_RESET: device was reset while suspended + */ +enum iwl_d3_status { + IWL_D3_STATUS_ALIVE, + IWL_D3_STATUS_RESET, +}; + +/** + * enum iwl_trans_status: transport status flags + * @STATUS_SYNC_HCMD_ACTIVE: a SYNC command is being processed + * @STATUS_DEVICE_ENABLED: APM is enabled + * @STATUS_TPOWER_PMI: the device might be asleep (need to wake it up) + * @STATUS_INT_ENABLED: interrupts are enabled + * @STATUS_RFKILL: the HW RFkill switch is in KILL position + * @STATUS_FW_ERROR: the fw is in error state + * @STATUS_TRANS_GOING_IDLE: shutting down the trans, only special commands + * are sent + * @STATUS_TRANS_IDLE: the trans is idle - general commands are not to be sent + */ +enum iwl_trans_status { + STATUS_SYNC_HCMD_ACTIVE, + STATUS_DEVICE_ENABLED, + STATUS_TPOWER_PMI, + STATUS_INT_ENABLED, + STATUS_RFKILL, + STATUS_FW_ERROR, + STATUS_TRANS_GOING_IDLE, + STATUS_TRANS_IDLE, +}; + +/** + * struct iwl_trans_config - transport configuration + * + * @op_mode: pointer to the upper layer. + * @cmd_queue: the index of the command queue. + * Must be set before start_fw. + * @cmd_fifo: the fifo for host commands + * @no_reclaim_cmds: Some devices erroneously don't set the + * SEQ_RX_FRAME bit on some notifications, this is the + * list of such notifications to filter. Max length is + * %MAX_NO_RECLAIM_CMDS. + * @n_no_reclaim_cmds: # of commands in list + * @rx_buf_size_8k: 8 kB RX buffer size needed for A-MSDUs, + * if unset 4k will be the RX buffer size + * @bc_table_dword: set to true if the BC table expects the byte count to be + * in DWORD (as opposed to bytes) + * @queue_watchdog_timeout: time (in ms) after which queues + * are considered stuck and will trigger device restart + * @command_names: array of command names, must be 256 entries + * (one for each command); for debugging only + */ +struct iwl_trans_config { + struct iwl_op_mode *op_mode; + + u8 cmd_queue; + u8 cmd_fifo; + const u8 *no_reclaim_cmds; + unsigned int n_no_reclaim_cmds; + + bool rx_buf_size_8k; + bool bc_table_dword; + unsigned int queue_watchdog_timeout; + const char *const *command_names; +}; + +struct iwl_trans; + /** * struct iwl_trans_ops - transport specific operations - * @alloc: allocates the meta data (not the queues themselves) - * @request_irq: requests IRQ - will be called before the FW load in probe flow - * @start_device: allocates and inits all the resources for the transport - * layer. - * @prepare_card_hw: claim the ownership on the HW. Will be called during - * probe. - * @tx_start: starts and configures all the Tx fifo - usually done once the fw - * is alive. - * @wake_any_queue: wake all the queues of a specfic context IWL_RXON_CTX_* - * @stop_device:stops the whole device (embedded CPU put to reset) - * @send_cmd:send a host command + * + * All the handlers MUST be implemented + * + * @start_hw: starts the HW- from that point on, the HW can send interrupts + * May sleep + * @op_mode_leave: Turn off the HW RF kill indication if on + * May sleep + * @start_fw: allocates and inits all the resources for the transport + * layer. Also kick a fw image. + * May sleep + * @fw_alive: called when the fw sends alive notification. If the fw provides + * the SCD base address in SRAM, then provide it here, or 0 otherwise. + * May sleep + * @stop_device: stops the whole device (embedded CPU put to reset) and stops + * the HW. From that point on, the HW will be in low power but will still + * issue interrupt if the HW RF kill is triggered. This callback must do + * the right thing and not crash even if start_hw() was called but not + * start_fw(). May sleep + * @d3_suspend: put the device into the correct mode for WoWLAN during + * suspend. This is optional, if not implemented WoWLAN will not be + * supported. This callback may sleep. + * @d3_resume: resume the device after WoWLAN, enabling the opmode to + * talk to the WoWLAN image to get its status. This is optional, if not + * implemented WoWLAN will not be supported. This callback may sleep. + * @send_cmd:send a host command. Must return -ERFKILL if RFkill is asserted. + * If RFkill is asserted in the middle of a SYNC host command, it must + * return -ERFKILL straight away. + * May sleep only if CMD_ASYNC is not set * @tx: send an skb + * Must be atomic * @reclaim: free packet until ssn. Returns a list of freed packets. - * @tx_agg_alloc: allocate resources for a TX BA session - * @tx_agg_setup: setup a tx queue for AMPDU - will be called once the HW is - * ready and a successful ADDBA response has been received. - * @tx_agg_disable: de-configure a Tx queue to send AMPDUs - * @kick_nic: remove the RESET from the embedded CPU and let it run - * @free: release all the ressource for the transport layer itself such as - * irq, tasklet etc... - * @stop_queue: stop a specific queue - * @check_stuck_queue: check if a specific queue is stuck - * @wait_tx_queue_empty: wait until all tx queues are empty + * Must be atomic + * @txq_enable: setup a queue. To setup an AC queue, use the + * iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before + * this one. The op_mode must not configure the HCMD queue. May sleep. + * @txq_disable: de-configure a Tx queue to send AMPDUs + * Must be atomic + * @wait_tx_queue_empty: wait until tx queues are empty. May sleep. * @dbgfs_register: add the dbgfs files under this directory. Files will be * automatically deleted. - * @suspend: stop the device unless WoWLAN is configured - * @resume: resume activity of the device + * @write8: write a u8 to a register at offset ofs from the BAR + * @write32: write a u32 to a register at offset ofs from the BAR + * @read32: read a u32 register at offset ofs from the BAR + * @read_prph: read a DWORD from a periphery register + * @write_prph: write a DWORD to a periphery register + * @read_mem: read device's SRAM in DWORD + * @write_mem: write device's SRAM in DWORD. If %buf is %NULL, then the memory + * will be zeroed. + * @configure: configure parameters required by the transport layer from + * the op_mode. May be called several times before start_fw, can't be + * called after that. + * @set_pmi: set the power pmi state + * @grab_nic_access: wake the NIC to be able to access non-HBUS regs. + * Sleeping is not allowed between grab_nic_access and + * release_nic_access. + * @release_nic_access: let the NIC go to sleep. The "flags" parameter + * must be the same one that was sent before to the grab_nic_access. + * @set_bits_mask - set SRAM register according to value and mask. + * @ref: grab a reference to the transport/FW layers, disallowing + * certain low power states + * @unref: release a reference previously taken with @ref. Note that + * initially the reference count is 1, making an initial @unref + * necessary to allow low power states. + * @dump_data: fill a data dump with debug data, maybe containing last + * TX'ed commands and similar. When called with a NULL buffer and + * zero buffer length, provide only the (estimated) required buffer + * length. Return the used buffer length. + * Note that the transport must fill in the proper file headers. */ struct iwl_trans_ops { - struct iwl_trans *(*alloc)(struct iwl_shared *shrd); - int (*request_irq)(struct iwl_trans *iwl_trans); - int (*start_device)(struct iwl_trans *trans); - int (*prepare_card_hw)(struct iwl_trans *trans); + int (*start_hw)(struct iwl_trans *iwl_trans); + void (*op_mode_leave)(struct iwl_trans *iwl_trans); + int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw, + bool run_in_rfkill); + int (*update_sf)(struct iwl_trans *trans, + struct iwl_sf_region *st_fwrd_space); + void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr); void (*stop_device)(struct iwl_trans *trans); - void (*tx_start)(struct iwl_trans *trans); - void (*wake_any_queue)(struct iwl_trans *trans, - enum iwl_rxon_context_id ctx, - const char *msg); + void (*d3_suspend)(struct iwl_trans *trans, bool test); + int (*d3_resume)(struct iwl_trans *trans, enum iwl_d3_status *status, + bool test); int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd); int (*tx)(struct iwl_trans *trans, struct sk_buff *skb, - struct iwl_device_cmd *dev_cmd, enum iwl_rxon_context_id ctx, - u8 sta_id, u8 tid); - int (*reclaim)(struct iwl_trans *trans, int sta_id, int tid, - int txq_id, int ssn, u32 status, + struct iwl_device_cmd *dev_cmd, int queue); + void (*reclaim)(struct iwl_trans *trans, int queue, int ssn, struct sk_buff_head *skbs); - int (*tx_agg_disable)(struct iwl_trans *trans, - int sta_id, int tid); - int (*tx_agg_alloc)(struct iwl_trans *trans, - int sta_id, int tid); - void (*tx_agg_setup)(struct iwl_trans *trans, - enum iwl_rxon_context_id ctx, int sta_id, int tid, - int frame_limit, u16 ssn); - - void (*kick_nic)(struct iwl_trans *trans); - - void (*free)(struct iwl_trans *trans); - - void (*stop_queue)(struct iwl_trans *trans, int q, const char *msg); + void (*txq_enable)(struct iwl_trans *trans, int queue, int fifo, + int sta_id, int tid, int frame_limit, u16 ssn); + void (*txq_disable)(struct iwl_trans *trans, int queue); int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir); - int (*check_stuck_queue)(struct iwl_trans *trans, int q); - int (*wait_tx_queue_empty)(struct iwl_trans *trans); -#ifdef CONFIG_PM_SLEEP - int (*suspend)(struct iwl_trans *trans); - int (*resume)(struct iwl_trans *trans); + int (*wait_tx_queue_empty)(struct iwl_trans *trans, u32 txq_bm); + + void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val); + void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val); + u32 (*read32)(struct iwl_trans *trans, u32 ofs); + u32 (*read_prph)(struct iwl_trans *trans, u32 ofs); + void (*write_prph)(struct iwl_trans *trans, u32 ofs, u32 val); + int (*read_mem)(struct iwl_trans *trans, u32 addr, + void *buf, int dwords); + int (*write_mem)(struct iwl_trans *trans, u32 addr, + const void *buf, int dwords); + void (*configure)(struct iwl_trans *trans, + const struct iwl_trans_config *trans_cfg); + void (*set_pmi)(struct iwl_trans *trans, bool state); + bool (*grab_nic_access)(struct iwl_trans *trans, bool silent, + unsigned long *flags); + void (*release_nic_access)(struct iwl_trans *trans, + unsigned long *flags); + void (*set_bits_mask)(struct iwl_trans *trans, u32 reg, u32 mask, + u32 value); + void (*ref)(struct iwl_trans *trans); + void (*unref)(struct iwl_trans *trans); + +#ifdef CONFIG_IWLWIFI_DEBUGFS + u32 (*dump_data)(struct iwl_trans *trans, void *buf, u32 buflen); #endif }; -/* one for each uCode image (inst/data, boot/init/runtime) */ -struct fw_desc { - dma_addr_t p_addr; /* hardware address */ - void *v_addr; /* software address */ - u32 len; /* size in bytes */ -}; - -struct fw_img { - struct fw_desc code; /* firmware code image */ - struct fw_desc data; /* firmware data image */ -}; - -/* Opaque calibration results */ -struct iwl_calib_result { - struct list_head list; - size_t cmd_len; - struct iwl_calib_hdr hdr; - /* data follows */ +/** + * enum iwl_trans_state - state of the transport layer + * + * @IWL_TRANS_NO_FW: no fw has sent an alive response + * @IWL_TRANS_FW_ALIVE: a fw has sent an alive response + */ +enum iwl_trans_state { + IWL_TRANS_NO_FW = 0, + IWL_TRANS_FW_ALIVE = 1, }; /** * struct iwl_trans - transport common data + * * @ops - pointer to iwl_trans_ops - * @shrd - pointer to iwl_shared which holds shared data from the upper layer - * @hcmd_lock: protects HCMD - * @ucode_write_complete: indicates that the ucode has been copied. - * @ucode_rt: run time ucode image - * @ucode_init: init ucode image - * @ucode_wowlan: wake on wireless ucode image (optional) - * @nvm_device_type: indicates OTP or eeprom - * @calib_results: list head for init calibration results + * @op_mode - pointer to the op_mode + * @cfg - pointer to the configuration + * @status: a bit-mask of transport status flags + * @dev - pointer to struct device * that represents the device + * @hw_id: a u32 with the ID of the device / subdevice. + * Set during transport allocation. + * @hw_id_str: a string with info about HW ID. Set during transport allocation. + * @pm_support: set to true in start_hw if link pm is supported + * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only. + * The user should use iwl_trans_{alloc,free}_tx_cmd. + * @dev_cmd_headroom: room needed for the transport's private use before the + * device_cmd for Tx - for internal use only + * The user should use iwl_trans_{alloc,free}_tx_cmd. + * @rx_mpdu_cmd: MPDU RX command ID, must be assigned by opmode before + * starting the firmware, used for tracing + * @rx_mpdu_cmd_hdr_size: used for tracing, amount of data before the + * start of the 802.11 header in the @rx_mpdu_cmd + * @dflt_pwr_limit: default power limit fetched from the platform (ACPI) */ struct iwl_trans { const struct iwl_trans_ops *ops; - struct iwl_shared *shrd; - spinlock_t hcmd_lock; + struct iwl_op_mode *op_mode; + const struct iwl_cfg *cfg; + enum iwl_trans_state state; + unsigned long status; - u8 ucode_write_complete; /* the image write is complete */ - struct fw_img ucode_rt; - struct fw_img ucode_init; - struct fw_img ucode_wowlan; + struct device *dev; + u32 hw_rev; + u32 hw_id; + char hw_id_str[52]; - /* eeprom related variables */ - int nvm_device_type; + u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size; + + bool pm_support; + + /* The following fields are internal only */ + struct kmem_cache *dev_cmd_pool; + size_t dev_cmd_headroom; + char dev_cmd_pool_name[50]; + + struct dentry *dbgfs_dir; + +#ifdef CONFIG_LOCKDEP + struct lockdep_map sync_cmd_lockdep_map; +#endif - /* init calibration results */ - struct list_head calib_results; + u64 dflt_pwr_limit; /* pointer to trans specific struct */ /*Ensure that this pointer will always be aligned to sizeof pointer */ - char trans_specific[0] __attribute__((__aligned__(sizeof(void *)))); + char trans_specific[0] __aligned(sizeof(void *)); }; -static inline int iwl_trans_request_irq(struct iwl_trans *trans) +static inline void iwl_trans_configure(struct iwl_trans *trans, + const struct iwl_trans_config *trans_cfg) { - return trans->ops->request_irq(trans); + trans->op_mode = trans_cfg->op_mode; + + trans->ops->configure(trans, trans_cfg); +} + +static inline int iwl_trans_start_hw(struct iwl_trans *trans) +{ + might_sleep(); + + return trans->ops->start_hw(trans); +} + +static inline void iwl_trans_op_mode_leave(struct iwl_trans *trans) +{ + might_sleep(); + + if (trans->ops->op_mode_leave) + trans->ops->op_mode_leave(trans); + + trans->op_mode = NULL; + + trans->state = IWL_TRANS_NO_FW; } -static inline int iwl_trans_start_device(struct iwl_trans *trans) +static inline void iwl_trans_fw_alive(struct iwl_trans *trans, u32 scd_addr) { - return trans->ops->start_device(trans); + might_sleep(); + + trans->state = IWL_TRANS_FW_ALIVE; + + trans->ops->fw_alive(trans, scd_addr); } -static inline int iwl_trans_prepare_card_hw(struct iwl_trans *trans) +static inline int iwl_trans_start_fw(struct iwl_trans *trans, + const struct fw_img *fw, + bool run_in_rfkill) { - return trans->ops->prepare_card_hw(trans); + might_sleep(); + + WARN_ON_ONCE(!trans->rx_mpdu_cmd); + + clear_bit(STATUS_FW_ERROR, &trans->status); + return trans->ops->start_fw(trans, fw, run_in_rfkill); +} + +static inline int iwl_trans_update_sf(struct iwl_trans *trans, + struct iwl_sf_region *st_fwrd_space) +{ + might_sleep(); + + if (trans->ops->update_sf) + return trans->ops->update_sf(trans, st_fwrd_space); + + return 0; } static inline void iwl_trans_stop_device(struct iwl_trans *trans) { + might_sleep(); + trans->ops->stop_device(trans); + + trans->state = IWL_TRANS_NO_FW; } -static inline void iwl_trans_tx_start(struct iwl_trans *trans) +static inline void iwl_trans_d3_suspend(struct iwl_trans *trans, bool test) { - trans->ops->tx_start(trans); + might_sleep(); + trans->ops->d3_suspend(trans, test); } -static inline void iwl_trans_wake_any_queue(struct iwl_trans *trans, - enum iwl_rxon_context_id ctx, - const char *msg) +static inline int iwl_trans_d3_resume(struct iwl_trans *trans, + enum iwl_d3_status *status, + bool test) { - trans->ops->wake_any_queue(trans, ctx, msg); + might_sleep(); + return trans->ops->d3_resume(trans, status, test); } +static inline void iwl_trans_ref(struct iwl_trans *trans) +{ + if (trans->ops->ref) + trans->ops->ref(trans); +} + +static inline void iwl_trans_unref(struct iwl_trans *trans) +{ + if (trans->ops->unref) + trans->ops->unref(trans); +} + +#ifdef CONFIG_IWLWIFI_DEBUGFS +static inline u32 iwl_trans_dump_data(struct iwl_trans *trans, + void *buf, u32 buflen) +{ + if (!trans->ops->dump_data) + return 0; + return trans->ops->dump_data(trans, buf, buflen); +} +#endif static inline int iwl_trans_send_cmd(struct iwl_trans *trans, - struct iwl_host_cmd *cmd) + struct iwl_host_cmd *cmd) { - return trans->ops->send_cmd(trans, cmd); + int ret; + + if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) && + test_bit(STATUS_RFKILL, &trans->status))) + return -ERFKILL; + + if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status))) + return -EIO; + + if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) { + IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + return -EIO; + } + + if (!(cmd->flags & CMD_ASYNC)) + lock_map_acquire_read(&trans->sync_cmd_lockdep_map); + + ret = trans->ops->send_cmd(trans, cmd); + + if (!(cmd->flags & CMD_ASYNC)) + lock_map_release(&trans->sync_cmd_lockdep_map); + + return ret; +} + +static inline struct iwl_device_cmd * +iwl_trans_alloc_tx_cmd(struct iwl_trans *trans) +{ + u8 *dev_cmd_ptr = kmem_cache_alloc(trans->dev_cmd_pool, GFP_ATOMIC); + + if (unlikely(dev_cmd_ptr == NULL)) + return NULL; + + return (struct iwl_device_cmd *) + (dev_cmd_ptr + trans->dev_cmd_headroom); } -int iwl_trans_send_cmd_pdu(struct iwl_trans *trans, u8 id, - u32 flags, u16 len, const void *data); +static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans, + struct iwl_device_cmd *dev_cmd) +{ + u8 *dev_cmd_ptr = (u8 *)dev_cmd - trans->dev_cmd_headroom; + + kmem_cache_free(trans->dev_cmd_pool, dev_cmd_ptr); +} static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb, - struct iwl_device_cmd *dev_cmd, enum iwl_rxon_context_id ctx, - u8 sta_id, u8 tid) + struct iwl_device_cmd *dev_cmd, int queue) { - return trans->ops->tx(trans, skb, dev_cmd, ctx, sta_id, tid); + if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status))) + return -EIO; + + if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) + IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + + return trans->ops->tx(trans, skb, dev_cmd, queue); } -static inline int iwl_trans_reclaim(struct iwl_trans *trans, int sta_id, - int tid, int txq_id, int ssn, u32 status, - struct sk_buff_head *skbs) +static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue, + int ssn, struct sk_buff_head *skbs) { - return trans->ops->reclaim(trans, sta_id, tid, txq_id, ssn, - status, skbs); + if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) + IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + + trans->ops->reclaim(trans, queue, ssn, skbs); } -static inline int iwl_trans_tx_agg_disable(struct iwl_trans *trans, - int sta_id, int tid) +static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue) { - return trans->ops->tx_agg_disable(trans, sta_id, tid); + trans->ops->txq_disable(trans, queue); } -static inline int iwl_trans_tx_agg_alloc(struct iwl_trans *trans, - int sta_id, int tid) +static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue, + int fifo, int sta_id, int tid, + int frame_limit, u16 ssn) { - return trans->ops->tx_agg_alloc(trans, sta_id, tid); + might_sleep(); + + if (unlikely((trans->state != IWL_TRANS_FW_ALIVE))) + IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + + trans->ops->txq_enable(trans, queue, fifo, sta_id, tid, + frame_limit, ssn); } +static inline void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue, + int fifo) +{ + iwl_trans_txq_enable(trans, queue, fifo, -1, + IWL_MAX_TID_COUNT, IWL_FRAME_LIMIT, 0); +} -static inline void iwl_trans_tx_agg_setup(struct iwl_trans *trans, - enum iwl_rxon_context_id ctx, - int sta_id, int tid, - int frame_limit, u16 ssn) +static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans, + u32 txq_bm) { - trans->ops->tx_agg_setup(trans, ctx, sta_id, tid, frame_limit, ssn); + if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) + IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + + return trans->ops->wait_tx_queue_empty(trans, txq_bm); } -static inline void iwl_trans_kick_nic(struct iwl_trans *trans) +static inline int iwl_trans_dbgfs_register(struct iwl_trans *trans, + struct dentry *dir) { - trans->ops->kick_nic(trans); + return trans->ops->dbgfs_register(trans, dir); } -static inline void iwl_trans_free(struct iwl_trans *trans) +static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val) { - trans->ops->free(trans); + trans->ops->write8(trans, ofs, val); } -static inline void iwl_trans_stop_queue(struct iwl_trans *trans, int q, - const char *msg) +static inline void iwl_trans_write32(struct iwl_trans *trans, u32 ofs, u32 val) { - trans->ops->stop_queue(trans, q, msg); + trans->ops->write32(trans, ofs, val); } -static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans) +static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs) { - return trans->ops->wait_tx_queue_empty(trans); + return trans->ops->read32(trans, ofs); } -static inline int iwl_trans_check_stuck_queue(struct iwl_trans *trans, int q) +static inline u32 iwl_trans_read_prph(struct iwl_trans *trans, u32 ofs) { - return trans->ops->check_stuck_queue(trans, q); + return trans->ops->read_prph(trans, ofs); } -static inline int iwl_trans_dbgfs_register(struct iwl_trans *trans, - struct dentry *dir) + +static inline void iwl_trans_write_prph(struct iwl_trans *trans, u32 ofs, + u32 val) { - return trans->ops->dbgfs_register(trans, dir); + return trans->ops->write_prph(trans, ofs, val); } -#ifdef CONFIG_PM_SLEEP -static inline int iwl_trans_suspend(struct iwl_trans *trans) +static inline int iwl_trans_read_mem(struct iwl_trans *trans, u32 addr, + void *buf, int dwords) { - return trans->ops->suspend(trans); + return trans->ops->read_mem(trans, addr, buf, dwords); } -static inline int iwl_trans_resume(struct iwl_trans *trans) +#define iwl_trans_read_mem_bytes(trans, addr, buf, bufsize) \ + do { \ + if (__builtin_constant_p(bufsize)) \ + BUILD_BUG_ON((bufsize) % sizeof(u32)); \ + iwl_trans_read_mem(trans, addr, buf, (bufsize) / sizeof(u32));\ + } while (0) + +static inline u32 iwl_trans_read_mem32(struct iwl_trans *trans, u32 addr) { - return trans->ops->resume(trans); + u32 value; + + if (WARN_ON(iwl_trans_read_mem(trans, addr, &value, 1))) + return 0xa5a5a5a5; + + return value; +} + +static inline int iwl_trans_write_mem(struct iwl_trans *trans, u32 addr, + const void *buf, int dwords) +{ + return trans->ops->write_mem(trans, addr, buf, dwords); +} + +static inline u32 iwl_trans_write_mem32(struct iwl_trans *trans, u32 addr, + u32 val) +{ + return iwl_trans_write_mem(trans, addr, &val, 1); +} + +static inline void iwl_trans_set_pmi(struct iwl_trans *trans, bool state) +{ + if (trans->ops->set_pmi) + trans->ops->set_pmi(trans, state); +} + +static inline void +iwl_trans_set_bits_mask(struct iwl_trans *trans, u32 reg, u32 mask, u32 value) +{ + trans->ops->set_bits_mask(trans, reg, mask, value); +} + +#define iwl_trans_grab_nic_access(trans, silent, flags) \ + __cond_lock(nic_access, \ + likely((trans)->ops->grab_nic_access(trans, silent, flags))) + +static inline void __releases(nic_access) +iwl_trans_release_nic_access(struct iwl_trans *trans, unsigned long *flags) +{ + trans->ops->release_nic_access(trans, flags); + __release(nic_access); +} + +static inline void iwl_trans_fw_error(struct iwl_trans *trans) +{ + if (WARN_ON_ONCE(!trans->op_mode)) + return; + + /* prevent double restarts due to the same erroneous FW */ + if (!test_and_set_bit(STATUS_FW_ERROR, &trans->status)) + iwl_op_mode_nic_error(trans->op_mode); } -#endif /***************************************************** -* Transport layers implementations +* driver (transport) register/unregister functions ******************************************************/ -extern const struct iwl_trans_ops trans_ops_pcie; +int __must_check iwl_pci_register_driver(void); +void iwl_pci_unregister_driver(void); -int iwl_alloc_fw_desc(struct iwl_bus *bus, struct fw_desc *desc, - const void *data, size_t len); -void iwl_dealloc_ucode(struct iwl_trans *trans); +static inline void trans_lockdep_init(struct iwl_trans *trans) +{ +#ifdef CONFIG_LOCKDEP + static struct lock_class_key __key; -int iwl_send_calib_results(struct iwl_trans *trans); -int iwl_calib_set(struct iwl_trans *trans, - const struct iwl_calib_hdr *cmd, int len); -void iwl_calib_free_results(struct iwl_trans *trans); + lockdep_init_map(&trans->sync_cmd_lockdep_map, "sync_cmd_lockdep_map", + &__key, 0); +#endif +} #endif /* __iwl_trans_h__ */ |