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linux_dsm_epyc7002/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
Eliad Peller e5d15cb530 iwlwifi: bail out in case of bad trans state 
In case of bad trans state (i.e. fw is not loaded) bail
out immediately instead of calling the trans, which might
not be fully initialized yet.

Also add WARN_ON_ONCE to help debugging where the errorneous
call is coming from.

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-12-21 19:35:41 +02:00

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/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
*
* 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
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <linuxwifi@intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/
#ifndef __iwl_trans_h__
#define __iwl_trans_h__
#include <linux/ieee80211.h>
#include <linux/mm.h> /* for page_address */
#include <linux/lockdep.h>
#include <linux/kernel.h>
#include "iwl-debug.h"
#include "iwl-config.h"
#include "iwl-fw.h"
#include "iwl-op-mode.h"
/**
* DOC: Transport layer - what is it ?
*
* The transport 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 command 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 functionality (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)
/*
* those functions retrieve specific information from
* the id field in the iwl_host_cmd struct which contains
* the command id, the group id and the version of the command
* and vice versa
*/
static inline u8 iwl_cmd_opcode(u32 cmdid)
{
return cmdid & 0xFF;
}
static inline u8 iwl_cmd_groupid(u32 cmdid)
{
return ((cmdid & 0xFF00) >> 8);
}
static inline u8 iwl_cmd_version(u32 cmdid)
{
return ((cmdid & 0xFF0000) >> 16);
}
static inline u32 iwl_cmd_id(u8 opcode, u8 groupid, u8 version)
{
return opcode + (groupid << 8) + (version << 16);
}
/* make u16 wide id out of u8 group and opcode */
#define WIDE_ID(grp, opcode) ((grp << 8) | opcode)
/* due to the conversion, this group is special; new groups
* should be defined in the appropriate fw-api header files
*/
#define IWL_ALWAYS_LONG_GROUP 1
/**
* 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 group_id;
/*
* 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;
/**
* struct iwl_cmd_header_wide
*
* This header format appears in the beginning of each command sent from the
* driver, and each response/notification received from uCode.
* this is the wide version that contains more information about the command
* like length, version and command type
*/
struct iwl_cmd_header_wide {
u8 cmd;
u8 group_id;
__le16 sequence;
__le16 length;
u8 reserved;
u8 version;
} __packed;
#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;
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;
}
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_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).
* @CMD_WANT_ASYNC_CALLBACK: the op_mode's async callback function must be
* called after this command completes. Valid only with CMD_ASYNC.
* @CMD_TB_BITMAP_POS: Position of the first bit for the TB bitmap. We need to
* check that we leave enough room for the TBs bitmap which needs 20 bits.
*/
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),
CMD_WANT_ASYNC_CALLBACK = BIT(7),
CMD_TB_BITMAP_POS = 11,
};
#define DEF_CMD_PAYLOAD_SIZE 320
/**
* struct iwl_device_cmd
*
* For allocation of the command and tx queues, this establishes the overall
* size of the largest command we send to uCode, except for commands that
* aren't fully copied and use other TFD space.
*/
struct iwl_device_cmd {
union {
struct {
struct iwl_cmd_header hdr; /* uCode API */
u8 payload[DEF_CMD_PAYLOAD_SIZE];
};
struct {
struct iwl_cmd_header_wide hdr_wide;
u8 payload_wide[DEF_CMD_PAYLOAD_SIZE -
sizeof(struct iwl_cmd_header_wide) +
sizeof(struct iwl_cmd_header)];
};
};
} __packed;
#define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd))
/*
* 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
* @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)
* @flags: can be CMD_*
* @len: array of the lengths of the chunks in data
* @dataflags: IWL_HCMD_DFL_*
* @id: command id of the host command, for wide commands encoding the
* version and group as well
*/
struct iwl_host_cmd {
const void *data[IWL_MAX_CMD_TBS_PER_TFD];
struct iwl_rx_packet *resp_pkt;
unsigned long _rx_page_addr;
u32 _rx_page_order;
u32 flags;
u32 id;
u16 len[IWL_MAX_CMD_TBS_PER_TFD];
u8 dataflags[IWL_MAX_CMD_TBS_PER_TFD];
};
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
/*
* The first entry in driver_data array in ieee80211_tx_info
* that can be used by the transport.
*/
#define IWL_TRANS_FIRST_DRIVER_DATA 2
#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
#define IWL_MAX_RX_HW_QUEUES 16
/**
* 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
* @STATUS_TRANS_DEAD: trans is dead - avoid any read/write operation
*/
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,
STATUS_TRANS_DEAD,
};
static inline int
iwl_trans_get_rb_size_order(enum iwl_amsdu_size rb_size)
{
switch (rb_size) {
case IWL_AMSDU_4K:
return get_order(4 * 1024);
case IWL_AMSDU_8K:
return get_order(8 * 1024);
case IWL_AMSDU_12K:
return get_order(12 * 1024);
default:
WARN_ON(1);
return -1;
}
}
struct iwl_hcmd_names {
u8 cmd_id;
const char *const cmd_name;
};
#define HCMD_NAME(x) \
{ .cmd_id = x, .cmd_name = #x }
struct iwl_hcmd_arr {
const struct iwl_hcmd_names *arr;
int size;
};
#define HCMD_ARR(x) \
{ .arr = x, .size = ARRAY_SIZE(x) }
/**
* 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
* @cmd_q_wdg_timeout: the timeout of the watchdog timer for the command queue.
* @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: 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)
* @scd_set_active: should the transport configure the SCD for HCMD queue
* @wide_cmd_header: firmware supports wide host command header
* @sw_csum_tx: transport should compute the TCP checksum
* @command_groups: array of command groups, each member is an array of the
* commands in the group; for debugging only
* @command_groups_size: number of command groups, to avoid illegal access
* @sdio_adma_addr: the default address to set for the ADMA in SDIO mode until
* we get the ALIVE from the uCode
*/
struct iwl_trans_config {
struct iwl_op_mode *op_mode;
u8 cmd_queue;
u8 cmd_fifo;
unsigned int cmd_q_wdg_timeout;
const u8 *no_reclaim_cmds;
unsigned int n_no_reclaim_cmds;
enum iwl_amsdu_size rx_buf_size;
bool bc_table_dword;
bool scd_set_active;
bool wide_cmd_header;
bool sw_csum_tx;
const struct iwl_hcmd_arr *command_groups;
int command_groups_size;
u32 sdio_adma_addr;
};
struct iwl_trans_dump_data {
u32 len;
u8 data[];
};
struct iwl_trans;
struct iwl_trans_txq_scd_cfg {
u8 fifo;
s8 sta_id;
u8 tid;
bool aggregate;
int frame_limit;
};
/**
* struct iwl_trans_ops - transport specific operations
*
* All the handlers MUST be implemented
*
* @start_hw: starts the HW. If low_power is true, the NIC needs to be taken
* out of a low power state. 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. If low_power is true, the NIC will be put in low power state.
* From that point on, the HW will be stopped but will still issue an
* interrupt if the HW RF kill switch 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. The transport relies on the op_mode to zero the
* the ieee80211_tx_info->driver_data. If the MPDU is an A-MSDU, all
* the CSUM will be taken care of (TCP CSUM and IP header in case of
* IPv4). If the MPDU is a single MSDU, the op_mode must compute the IP
* header if it is IPv4.
* Must be atomic
* @reclaim: free packet until ssn. Returns a list of freed packets.
* 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. The scheduler
* configuration may be %NULL, in which case the hardware will not be
* configured. 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.
* @freeze_txq_timer: prevents the timer of the queue from firing until the
* queue is set to awake. Must be atomic.
* @block_txq_ptrs: stop updating the write pointers of the Tx queues. Note
* that the transport needs to refcount the calls since this function
* will be called several times with block = true, and then the queues
* need to be unblocked only after the same number of calls with
* block = false.
* @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: return a vmalloc'ed buffer with debug data, maybe containing last
* TX'ed commands and similar. The buffer will be vfree'd by the caller.
* Note that the transport must fill in the proper file headers.
*/
struct iwl_trans_ops {
int (*start_hw)(struct iwl_trans *iwl_trans, bool low_power);
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, bool low_power);
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, int queue);
void (*reclaim)(struct iwl_trans *trans, int queue, int ssn,
struct sk_buff_head *skbs);
void (*txq_enable)(struct iwl_trans *trans, int queue, u16 ssn,
const struct iwl_trans_txq_scd_cfg *cfg,
unsigned int queue_wdg_timeout);
void (*txq_disable)(struct iwl_trans *trans, int queue,
bool configure_scd);
int (*wait_tx_queue_empty)(struct iwl_trans *trans, u32 txq_bm);
void (*freeze_txq_timer)(struct iwl_trans *trans, unsigned long txqs,
bool freeze);
void (*block_txq_ptrs)(struct iwl_trans *trans, bool block);
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, 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);
int (*suspend)(struct iwl_trans *trans);
void (*resume)(struct iwl_trans *trans);
struct iwl_trans_dump_data *(*dump_data)(struct iwl_trans *trans,
struct iwl_fw_dbg_trigger_tlv
*trigger);
};
/**
* 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,
};
/**
* DOC: Platform power management
*
* There are two types of platform power management: system-wide
* (WoWLAN) and runtime.
*
* In system-wide power management the entire platform goes into a low
* power state (e.g. idle or suspend to RAM) at the same time and the
* device is configured as a wakeup source for the entire platform.
* This is usually triggered by userspace activity (e.g. the user
* presses the suspend button or a power management daemon decides to
* put the platform in low power mode). The device's behavior in this
* mode is dictated by the wake-on-WLAN configuration.
*
* In runtime power management, only the devices which are themselves
* idle enter a low power state. This is done at runtime, which means
* that the entire system is still running normally. This mode is
* usually triggered automatically by the device driver and requires
* the ability to enter and exit the low power modes in a very short
* time, so there is not much impact in usability.
*
* The terms used for the device's behavior are as follows:
*
* - D0: the device is fully powered and the host is awake;
* - D3: the device is in low power mode and only reacts to
* specific events (e.g. magic-packet received or scan
* results found);
* - D0I3: the device is in low power mode and reacts to any
* activity (e.g. RX);
*
* These terms reflect the power modes in the firmware and are not to
* be confused with the physical device power state. The NIC can be
* in D0I3 mode even if, for instance, the PCI device is in D3 state.
*/
/**
* enum iwl_plat_pm_mode - platform power management mode
*
* This enumeration describes the device's platform power management
* behavior when in idle mode (i.e. runtime power management) or when
* in system-wide suspend (i.e WoWLAN).
*
* @IWL_PLAT_PM_MODE_DISABLED: power management is disabled for this
* device. At runtime, this means that nothing happens and the
* device always remains in active. In system-wide suspend mode,
* it means that the all connections will be closed automatically
* by mac80211 before the platform is suspended.
* @IWL_PLAT_PM_MODE_D3: the device goes into D3 mode (i.e. WoWLAN).
* For runtime power management, this mode is not officially
* supported.
* @IWL_PLAT_PM_MODE_D0I3: the device goes into D0I3 mode.
*/
enum iwl_plat_pm_mode {
IWL_PLAT_PM_MODE_DISABLED,
IWL_PLAT_PM_MODE_D3,
IWL_PLAT_PM_MODE_D0I3,
};
/**
* struct iwl_trans - transport common data
*
* @ops - pointer to iwl_trans_ops
* @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
* @max_skb_frags: maximum number of fragments an SKB can have when transmitted.
* 0 indicates that frag SKBs (NETIF_F_SG) aren't supported.
* @hw_id: a u32 with the ID of the device / sub-device.
* 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
* @ltr_enabled: set to true if the LTR is enabled
* @num_rx_queues: number of RX queues allocated by the transport;
* the transport must set this before calling iwl_drv_start()
* @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)
* @dbg_dest_tlv: points to the destination TLV for debug
* @dbg_conf_tlv: array of pointers to configuration TLVs for debug
* @dbg_trigger_tlv: array of pointers to triggers TLVs for debug
* @dbg_dest_reg_num: num of reg_ops in %dbg_dest_tlv
* @paging_req_addr: The location were the FW will upload / download the pages
* from. The address is set by the opmode
* @paging_db: Pointer to the opmode paging data base, the pointer is set by
* the opmode.
* @paging_download_buf: Buffer used for copying all of the pages before
* downloading them to the FW. The buffer is allocated in the opmode
* @system_pm_mode: the system-wide power management mode in use.
* This mode is set dynamically, depending on the WoWLAN values
* configured from the userspace at runtime.
* @runtime_pm_mode: the runtime power management mode in use. This
* mode is set during the initialization phase and is not
* supposed to change during runtime.
*/
struct iwl_trans {
const struct iwl_trans_ops *ops;
struct iwl_op_mode *op_mode;
const struct iwl_cfg *cfg;
enum iwl_trans_state state;
unsigned long status;
struct device *dev;
u32 max_skb_frags;
u32 hw_rev;
u32 hw_id;
char hw_id_str[52];
u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size;
bool pm_support;
bool ltr_enabled;
const struct iwl_hcmd_arr *command_groups;
int command_groups_size;
u8 num_rx_queues;
/* 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
u64 dflt_pwr_limit;
const struct iwl_fw_dbg_dest_tlv *dbg_dest_tlv;
const struct iwl_fw_dbg_conf_tlv *dbg_conf_tlv[FW_DBG_CONF_MAX];
struct iwl_fw_dbg_trigger_tlv * const *dbg_trigger_tlv;
u8 dbg_dest_reg_num;
/*
* Paging parameters - All of the parameters should be set by the
* opmode when paging is enabled
*/
u32 paging_req_addr;
struct iwl_fw_paging *paging_db;
void *paging_download_buf;
enum iwl_plat_pm_mode system_pm_mode;
enum iwl_plat_pm_mode runtime_pm_mode;
/* pointer to trans specific struct */
/*Ensure that this pointer will always be aligned to sizeof pointer */
char trans_specific[0] __aligned(sizeof(void *));
};
const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id);
int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans);
static inline void iwl_trans_configure(struct iwl_trans *trans,
const struct iwl_trans_config *trans_cfg)
{
trans->op_mode = trans_cfg->op_mode;
trans->ops->configure(trans, trans_cfg);
WARN_ON(iwl_cmd_groups_verify_sorted(trans_cfg));
}
static inline int _iwl_trans_start_hw(struct iwl_trans *trans, bool low_power)
{
might_sleep();
return trans->ops->start_hw(trans, low_power);
}
static inline int iwl_trans_start_hw(struct iwl_trans *trans)
{
return trans->ops->start_hw(trans, true);
}
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 void iwl_trans_fw_alive(struct iwl_trans *trans, u32 scd_addr)
{
might_sleep();
trans->state = IWL_TRANS_FW_ALIVE;
trans->ops->fw_alive(trans, scd_addr);
}
static inline int iwl_trans_start_fw(struct iwl_trans *trans,
const struct fw_img *fw,
bool run_in_rfkill)
{
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,
bool low_power)
{
might_sleep();
trans->ops->stop_device(trans, low_power);
trans->state = IWL_TRANS_NO_FW;
}
static inline void iwl_trans_stop_device(struct iwl_trans *trans)
{
_iwl_trans_stop_device(trans, true);
}
static inline void iwl_trans_d3_suspend(struct iwl_trans *trans, bool test)
{
might_sleep();
if (trans->ops->d3_suspend)
trans->ops->d3_suspend(trans, test);
}
static inline int iwl_trans_d3_resume(struct iwl_trans *trans,
enum iwl_d3_status *status,
bool test)
{
might_sleep();
if (!trans->ops->d3_resume)
return 0;
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);
}
static inline int iwl_trans_suspend(struct iwl_trans *trans)
{
if (!trans->ops->suspend)
return 0;
return trans->ops->suspend(trans);
}
static inline void iwl_trans_resume(struct iwl_trans *trans)
{
if (trans->ops->resume)
trans->ops->resume(trans);
}
static inline struct iwl_trans_dump_data *
iwl_trans_dump_data(struct iwl_trans *trans,
struct iwl_fw_dbg_trigger_tlv *trigger)
{
if (!trans->ops->dump_data)
return NULL;
return trans->ops->dump_data(trans, trigger);
}
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(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
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, int queue)
{
if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
return -EIO;
if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
return -EIO;
}
return trans->ops->tx(trans, skb, dev_cmd, queue);
}
static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue,
int ssn, struct sk_buff_head *skbs)
{
if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
return;
}
trans->ops->reclaim(trans, queue, ssn, skbs);
}
static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue,
bool configure_scd)
{
trans->ops->txq_disable(trans, queue, configure_scd);
}
static inline void
iwl_trans_txq_enable_cfg(struct iwl_trans *trans, int queue, u16 ssn,
const struct iwl_trans_txq_scd_cfg *cfg,
unsigned int queue_wdg_timeout)
{
might_sleep();
if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
return;
}
trans->ops->txq_enable(trans, queue, ssn, cfg, queue_wdg_timeout);
}
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,
unsigned int queue_wdg_timeout)
{
struct iwl_trans_txq_scd_cfg cfg = {
.fifo = fifo,
.sta_id = sta_id,
.tid = tid,
.frame_limit = frame_limit,
.aggregate = sta_id >= 0,
};
iwl_trans_txq_enable_cfg(trans, queue, ssn, &cfg, queue_wdg_timeout);
}
static inline
void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue, int fifo,
unsigned int queue_wdg_timeout)
{
struct iwl_trans_txq_scd_cfg cfg = {
.fifo = fifo,
.sta_id = -1,
.tid = IWL_MAX_TID_COUNT,
.frame_limit = IWL_FRAME_LIMIT,
.aggregate = false,
};
iwl_trans_txq_enable_cfg(trans, queue, 0, &cfg, queue_wdg_timeout);
}
static inline void iwl_trans_freeze_txq_timer(struct iwl_trans *trans,
unsigned long txqs,
bool freeze)
{
if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
return;
}
if (trans->ops->freeze_txq_timer)
trans->ops->freeze_txq_timer(trans, txqs, freeze);
}
static inline void iwl_trans_block_txq_ptrs(struct iwl_trans *trans,
bool block)
{
if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
return;
}
if (trans->ops->block_txq_ptrs)
trans->ops->block_txq_ptrs(trans, block);
}
static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans,
u32 txqs)
{
if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
return -EIO;
}
return trans->ops->wait_tx_queue_empty(trans, txqs);
}
static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val)
{
trans->ops->write8(trans, ofs, val);
}
static inline void iwl_trans_write32(struct iwl_trans *trans, u32 ofs, u32 val)
{
trans->ops->write32(trans, ofs, val);
}
static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs)
{
return trans->ops->read32(trans, ofs);
}
static inline u32 iwl_trans_read_prph(struct iwl_trans *trans, u32 ofs)
{
return trans->ops->read_prph(trans, ofs);
}
static inline void iwl_trans_write_prph(struct iwl_trans *trans, u32 ofs,
u32 val)
{
return trans->ops->write_prph(trans, ofs, val);
}
static inline int iwl_trans_read_mem(struct iwl_trans *trans, u32 addr,
void *buf, int dwords)
{
return trans->ops->read_mem(trans, addr, buf, dwords);
}
#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)
{
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, flags) \
__cond_lock(nic_access, \
likely((trans)->ops->grab_nic_access(trans, 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);
}
/*****************************************************
* transport helper functions
*****************************************************/
struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
struct device *dev,
const struct iwl_cfg *cfg,
const struct iwl_trans_ops *ops,
size_t dev_cmd_headroom);
void iwl_trans_free(struct iwl_trans *trans);
/*****************************************************
* driver (transport) register/unregister functions
******************************************************/
int __must_check iwl_pci_register_driver(void);
void iwl_pci_unregister_driver(void);
#endif /* __iwl_trans_h__ */
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