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/*
* Copyright (c) 2005-2011 Atheros Communications Inc.
* Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _PCI_H_
#define _PCI_H_
#include <linux/interrupt.h>
#include "hw.h"
#include "ce.h"
#include "ahb.h"
/*
* maximum number of bytes that can be
* handled atomically by DiagRead/DiagWrite
*/
#define DIAG_TRANSFER_LIMIT 2048
struct bmi_xfer {
bool tx_done;
bool rx_done;
bool wait_for_resp;
u32 resp_len;
};
/*
* PCI-specific Target state
*
* NOTE: Structure is shared between Host software and Target firmware!
*
* Much of this may be of interest to the Host so
* HOST_INTEREST->hi_interconnect_state points here
* (and all members are 32-bit quantities in order to
* facilitate Host access). In particular, Host software is
* required to initialize pipe_cfg_addr and svc_to_pipe_map.
*/
struct pcie_state {
/* Pipe configuration Target address */
/* NB: ce_pipe_config[CE_COUNT] */
u32 pipe_cfg_addr;
/* Service to pipe map Target address */
/* NB: service_to_pipe[PIPE_TO_CE_MAP_CN] */
u32 svc_to_pipe_map;
/* number of MSI interrupts requested */
u32 msi_requested;
/* number of MSI interrupts granted */
u32 msi_granted;
/* Message Signalled Interrupt address */
u32 msi_addr;
/* Base data */
u32 msi_data;
/*
* Data for firmware interrupt;
* MSI data for other interrupts are
* in various SoC registers
*/
u32 msi_fw_intr_data;
/* PCIE_PWR_METHOD_* */
u32 power_mgmt_method;
/* PCIE_CONFIG_FLAG_* */
u32 config_flags;
};
/* PCIE_CONFIG_FLAG definitions */
#define PCIE_CONFIG_FLAG_ENABLE_L1 0x0000001
/* Per-pipe state. */
struct ath10k_pci_pipe {
/* Handle of underlying Copy Engine */
struct ath10k_ce_pipe *ce_hdl;
/* Our pipe number; facilitiates use of pipe_info ptrs. */
u8 pipe_num;
/* Convenience back pointer to hif_ce_state. */
struct ath10k *hif_ce_state;
size_t buf_sz;
/* protects compl_free and num_send_allowed */
spinlock_t pipe_lock;
};
struct ath10k_pci_supp_chip {
u32 dev_id;
u32 rev_id;
};
enum ath10k_pci_irq_mode {
ATH10K_PCI_IRQ_AUTO = 0,
ATH10K_PCI_IRQ_LEGACY = 1,
ATH10K_PCI_IRQ_MSI = 2,
};
struct ath10k_pci {
struct pci_dev *pdev;
struct device *dev;
struct ath10k *ar;
void __iomem *mem;
size_t mem_len;
/* Operating interrupt mode */
enum ath10k_pci_irq_mode oper_irq_mode;
struct ath10k_pci_pipe pipe_info[CE_COUNT_MAX];
/* Copy Engine used for Diagnostic Accesses */
struct ath10k_ce_pipe *ce_diag;
struct ath10k_ce ce;
struct timer_list rx_post_retry;
/* Due to HW quirks it is recommended to disable ASPM during device
* bootup. To do that the original PCI-E Link Control is stored before
* device bootup is executed and re-programmed later.
*/
u16 link_ctl;
/* Protects ps_awake and ps_wake_refcount */
spinlock_t ps_lock;
/* The device has a special powersave-oriented register. When device is
* considered asleep it drains less power and driver is forbidden from
* accessing most MMIO registers. If host were to access them without
* waking up the device might scribble over host memory or return
* 0xdeadbeef readouts.
*/
unsigned long ps_wake_refcount;
/* Waking up takes some time (up to 2ms in some cases) so it can be bad
* for latency. To mitigate this the device isn't immediately allowed
* to sleep after all references are undone - instead there's a grace
* period after which the powersave register is updated unless some
* activity to/from device happened in the meantime.
*
* Also see comments on ATH10K_PCI_SLEEP_GRACE_PERIOD_MSEC.
*/
struct timer_list ps_timer;
/* MMIO registers are used to communicate with the device. With
* intensive traffic accessing powersave register would be a bit
* wasteful overhead and would needlessly stall CPU. It is far more
* efficient to rely on a variable in RAM and update it only upon
* powersave register state changes.
*/
bool ps_awake;
/* pci power save, disable for QCA988X and QCA99X0.
* Writing 'false' to this variable avoids frequent locking
* on MMIO read/write.
*/
bool pci_ps;
/* Chip specific pci reset routine used to do a safe reset */
int (*pci_soft_reset)(struct ath10k *ar);
/* Chip specific pci full reset function */
int (*pci_hard_reset)(struct ath10k *ar);
/* chip specific methods for converting target CPU virtual address
* space to CE address space
*/
u32 (*targ_cpu_to_ce_addr)(struct ath10k *ar, u32 addr);
/* Keep this entry in the last, memory for struct ath10k_ahb is
* allocated (ahb support enabled case) in the continuation of
* this struct.
*/
struct ath10k_ahb ahb[0];
};
static inline struct ath10k_pci *ath10k_pci_priv(struct ath10k *ar)
{
return (struct ath10k_pci *)ar->drv_priv;
}
#define ATH10K_PCI_RX_POST_RETRY_MS 50
#define ATH_PCI_RESET_WAIT_MAX 10 /* ms */
#define PCIE_WAKE_TIMEOUT 30000 /* 30ms */
#define PCIE_WAKE_LATE_US 10000 /* 10ms */
#define BAR_NUM 0
#define CDC_WAR_MAGIC_STR 0xceef0000
#define CDC_WAR_DATA_CE 4
/* Wait up to this many Ms for a Diagnostic Access CE operation to complete */
#define DIAG_ACCESS_CE_TIMEOUT_MS 10
void ath10k_pci_write32(struct ath10k *ar, u32 offset, u32 value);
void ath10k_pci_soc_write32(struct ath10k *ar, u32 addr, u32 val);
void ath10k_pci_reg_write32(struct ath10k *ar, u32 addr, u32 val);
u32 ath10k_pci_read32(struct ath10k *ar, u32 offset);
u32 ath10k_pci_soc_read32(struct ath10k *ar, u32 addr);
u32 ath10k_pci_reg_read32(struct ath10k *ar, u32 addr);
int ath10k_pci_hif_tx_sg(struct ath10k *ar, u8 pipe_id,
struct ath10k_hif_sg_item *items, int n_items);
int ath10k_pci_hif_diag_read(struct ath10k *ar, u32 address, void *buf,
size_t buf_len);
int ath10k_pci_diag_write_mem(struct ath10k *ar, u32 address,
const void *data, int nbytes);
int ath10k_pci_hif_exchange_bmi_msg(struct ath10k *ar, void *req, u32 req_len,
void *resp, u32 *resp_len);
int ath10k_pci_hif_map_service_to_pipe(struct ath10k *ar, u16 service_id,
u8 *ul_pipe, u8 *dl_pipe);
void ath10k_pci_hif_get_default_pipe(struct ath10k *ar, u8 *ul_pipe,
u8 *dl_pipe);
void ath10k_pci_hif_send_complete_check(struct ath10k *ar, u8 pipe,
int force);
u16 ath10k_pci_hif_get_free_queue_number(struct ath10k *ar, u8 pipe);
void ath10k_pci_hif_power_down(struct ath10k *ar);
int ath10k_pci_alloc_pipes(struct ath10k *ar);
void ath10k_pci_free_pipes(struct ath10k *ar);
void ath10k_pci_free_pipes(struct ath10k *ar);
void ath10k_pci_rx_replenish_retry(struct timer_list *t);
void ath10k_pci_ce_deinit(struct ath10k *ar);
void ath10k_pci_init_napi(struct ath10k *ar);
int ath10k_pci_init_pipes(struct ath10k *ar);
int ath10k_pci_init_config(struct ath10k *ar);
void ath10k_pci_rx_post(struct ath10k *ar);
void ath10k_pci_flush(struct ath10k *ar);
void ath10k_pci_enable_legacy_irq(struct ath10k *ar);
bool ath10k_pci_irq_pending(struct ath10k *ar);
void ath10k_pci_disable_and_clear_legacy_irq(struct ath10k *ar);
void ath10k_pci_irq_msi_fw_mask(struct ath10k *ar);
int ath10k_pci_wait_for_target_init(struct ath10k *ar);
int ath10k_pci_setup_resource(struct ath10k *ar);
void ath10k_pci_release_resource(struct ath10k *ar);
/* QCA6174 is known to have Tx/Rx issues when SOC_WAKE register is poked too
* frequently. To avoid this put SoC to sleep after a very conservative grace
* period. Adjust with great care.
*/
#define ATH10K_PCI_SLEEP_GRACE_PERIOD_MSEC 60
#endif /* _PCI_H_ */
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