drivers/net/wireless/ath/ath10k/pci.h - maze/linux - Git at Google

 /*
  * Copyright (c) 2005-2011 Atheros Communications Inc.
  * Copyright (c) 2011-2013 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"

 /* FW dump area */
 #define REG_DUMP_COUNT_QCA988X 60

 /*
  * maximum number of bytes that can be handled atomically by DiagRead/DiagWrite
  */
 #define DIAG_TRANSFER_LIMIT 2048

 /*
  * maximum number of bytes that can be
  * handled atomically by DiagRead/DiagWrite
  */
 #define DIAG_TRANSFER_LIMIT 2048

 struct bmi_xfer {
 	struct completion 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

 /* Host software's Copy Engine configuration. */
 #define CE_ATTR_FLAGS 0

 /*
  * Configuration information for a Copy Engine pipe.
  * Passed from Host to Target during startup (one per CE).
  *
  * NOTE: Structure is shared between Host software and Target firmware!
  */
 struct ce_pipe_config {
 	u32 pipenum;
 	u32 pipedir;
 	u32 nentries;
 	u32 nbytes_max;
 	u32 flags;
 	u32 reserved;
 };

 /*
  * Directions for interconnect pipe configuration.
  * These definitions may be used during configuration and are shared
  * between Host and Target.
  *
  * Pipe Directions are relative to the Host, so PIPEDIR_IN means
  * "coming IN over air through Target to Host" as with a WiFi Rx operation.
  * Conversely, PIPEDIR_OUT means "going OUT from Host through Target over air"
  * as with a WiFi Tx operation. This is somewhat awkward for the "middle-man"
  * Target since things that are "PIPEDIR_OUT" are coming IN to the Target
  * over the interconnect.
  */
 #define PIPEDIR_NONE    0
 #define PIPEDIR_IN      1  /* Target-->Host, WiFi Rx direction */
 #define PIPEDIR_OUT     2  /* Host->Target, WiFi Tx direction */
 #define PIPEDIR_INOUT   3  /* bidirectional */

 /* Establish a mapping between a service/direction and a pipe. */
 struct service_to_pipe {
 	u32 service_id;
 	u32 pipedir;
 	u32 pipenum;
 };

 enum ath10k_pci_features {
 	ATH10K_PCI_FEATURE_MSI_X		= 0,
 	ATH10K_PCI_FEATURE_SOC_POWER_SAVE	= 1,

 	/* keep last */
 	ATH10K_PCI_FEATURE_COUNT
 };

 /* 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 *ar_pci;
 	struct tasklet_struct intr;
 };

 struct ath10k_pci {
 	struct pci_dev *pdev;
 	struct device *dev;
 	struct ath10k *ar;
 	void __iomem *mem;

 	DECLARE_BITMAP(features, ATH10K_PCI_FEATURE_COUNT);

 	/*
 	 * Number of MSI interrupts granted, 0 --> using legacy PCI line
 	 * interrupts.
 	 */
 	int num_msi_intrs;

 	struct tasklet_struct intr_tq;
 	struct tasklet_struct msi_fw_err;
 	struct tasklet_struct early_irq_tasklet;

 	int started;

 	atomic_t keep_awake_count;
 	bool verified_awake;

 	struct ath10k_pci_pipe pipe_info[CE_COUNT_MAX];

 	struct ath10k_hif_cb msg_callbacks_current;

 	/* Target address used to signal a pending firmware event */
 	u32 fw_indicator_address;

 	/* Copy Engine used for Diagnostic Accesses */
 	struct ath10k_ce_pipe *ce_diag;

 	/* FIXME: document what this really protects */
 	spinlock_t ce_lock;

 	/* Map CE id to ce_state */
 	struct ath10k_ce_pipe ce_states[CE_COUNT_MAX];
 };

 static inline struct ath10k_pci *ath10k_pci_priv(struct ath10k *ar)
 {
 	return ar->hif.priv;
 }

 static inline u32 ath10k_pci_reg_read32(struct ath10k *ar, u32 addr)
 {
 	struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);

 	return ioread32(ar_pci->mem + PCIE_LOCAL_BASE_ADDRESS + addr);
 }

 static inline void ath10k_pci_reg_write32(struct ath10k *ar, u32 addr, u32 val)
 {
 	struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);

 	iowrite32(val, ar_pci->mem + PCIE_LOCAL_BASE_ADDRESS + addr);
 }

 #define ATH_PCI_RESET_WAIT_MAX 10 /* ms */
 #define PCIE_WAKE_TIMEOUT 5000	/* 5ms */

 #define BAR_NUM 0

 #define CDC_WAR_MAGIC_STR   0xceef0000
 #define CDC_WAR_DATA_CE     4

 /*
  * TODO: Should be a function call specific to each Target-type.
  * This convoluted macro converts from Target CPU Virtual Address Space to CE
  * Address Space. As part of this process, we conservatively fetch the current
  * PCIE_BAR. MOST of the time, this should match the upper bits of PCI space
  * for this device; but that's not guaranteed.
  */
 #define TARG_CPU_SPACE_TO_CE_SPACE(ar, pci_addr, addr)			\
 	(((ioread32((pci_addr)+(SOC_CORE_BASE_ADDRESS|			\
 	  CORE_CTRL_ADDRESS)) & 0x7ff) << 21) |				\
 	 0x100000 | ((addr) & 0xfffff))

 /* Wait up to this many Ms for a Diagnostic Access CE operation to complete */
 #define DIAG_ACCESS_CE_TIMEOUT_MS 10

 /*
  * This API allows the Host to access Target registers directly
  * and relatively efficiently over PCIe.
  * This allows the Host to avoid extra overhead associated with
  * sending a message to firmware and waiting for a response message
  * from firmware, as is done on other interconnects.
  *
  * Yet there is some complexity with direct accesses because the
  * Target's power state is not known a priori. The Host must issue
  * special PCIe reads/writes in order to explicitly wake the Target
  * and to verify that it is awake and will remain awake.
  *
  * Usage:
  *
  *   Use ath10k_pci_read32 and ath10k_pci_write32 to access Target space.
  *   These calls must be bracketed by ath10k_pci_wake and
  *   ath10k_pci_sleep.  A single BEGIN/END pair is adequate for
  *   multiple READ/WRITE operations.
  *
  *   Use ath10k_pci_wake to put the Target in a state in
  *   which it is legal for the Host to directly access it. This
  *   may involve waking the Target from a low power state, which
  *   may take up to 2Ms!
  *
  *   Use ath10k_pci_sleep to tell the Target that as far as
  *   this code path is concerned, it no longer needs to remain
  *   directly accessible.  BEGIN/END is under a reference counter;
  *   multiple code paths may issue BEGIN/END on a single targid.
  */
 static inline void ath10k_pci_write32(struct ath10k *ar, u32 offset,
 				      u32 value)
 {
 	struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);

 	iowrite32(value, ar_pci->mem + offset);
 }

 static inline u32 ath10k_pci_read32(struct ath10k *ar, u32 offset)
 {
 	struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);

 	return ioread32(ar_pci->mem + offset);
 }

 static inline u32 ath10k_pci_soc_read32(struct ath10k *ar, u32 addr)
 {
 	return ath10k_pci_read32(ar, RTC_SOC_BASE_ADDRESS + addr);
 }

 static inline void ath10k_pci_soc_write32(struct ath10k *ar, u32 addr, u32 val)
 {
 	ath10k_pci_write32(ar, RTC_SOC_BASE_ADDRESS + addr, val);
 }

 int ath10k_do_pci_wake(struct ath10k *ar);
 void ath10k_do_pci_sleep(struct ath10k *ar);

 static inline int ath10k_pci_wake(struct ath10k *ar)
 {
 	struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);

 	if (test_bit(ATH10K_PCI_FEATURE_SOC_POWER_SAVE, ar_pci->features))
 		return ath10k_do_pci_wake(ar);

 	return 0;
 }

 static inline void ath10k_pci_sleep(struct ath10k *ar)
 {
 	struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);

 	if (test_bit(ATH10K_PCI_FEATURE_SOC_POWER_SAVE, ar_pci->features))
 		ath10k_do_pci_sleep(ar);
 }

 #endif /* _PCI_H_ */
	/*
	* Copyright (c) 2005-2011 Atheros Communications Inc.
	* Copyright (c) 2011-2013 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"

	/* FW dump area */
	#define REG_DUMP_COUNT_QCA988X 60

	/*
	* maximum number of bytes that can be handled atomically by DiagRead/DiagWrite
	*/
	#define DIAG_TRANSFER_LIMIT 2048

	/*
	* maximum number of bytes that can be
	* handled atomically by DiagRead/DiagWrite
	*/
	#define DIAG_TRANSFER_LIMIT 2048

	struct bmi_xfer {
	struct completion 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

	/* Host software's Copy Engine configuration. */
	#define CE_ATTR_FLAGS 0

	/*
	* Configuration information for a Copy Engine pipe.
	* Passed from Host to Target during startup (one per CE).
	*
	* NOTE: Structure is shared between Host software and Target firmware!
	*/
	struct ce_pipe_config {
	u32 pipenum;
	u32 pipedir;
	u32 nentries;
	u32 nbytes_max;
	u32 flags;
	u32 reserved;
	};

	/*
	* Directions for interconnect pipe configuration.
	* These definitions may be used during configuration and are shared
	* between Host and Target.
	*
	* Pipe Directions are relative to the Host, so PIPEDIR_IN means
	* "coming IN over air through Target to Host" as with a WiFi Rx operation.
	* Conversely, PIPEDIR_OUT means "going OUT from Host through Target over air"
	* as with a WiFi Tx operation. This is somewhat awkward for the "middle-man"
	* Target since things that are "PIPEDIR_OUT" are coming IN to the Target
	* over the interconnect.
	*/
	#define PIPEDIR_NONE 0
	#define PIPEDIR_IN 1 /* Target-->Host, WiFi Rx direction */
	#define PIPEDIR_OUT 2 /* Host->Target, WiFi Tx direction */
	#define PIPEDIR_INOUT 3 /* bidirectional */

	/* Establish a mapping between a service/direction and a pipe. */
	struct service_to_pipe {
	u32 service_id;
	u32 pipedir;
	u32 pipenum;
	};

	enum ath10k_pci_features {
	ATH10K_PCI_FEATURE_MSI_X = 0,
	ATH10K_PCI_FEATURE_SOC_POWER_SAVE = 1,

	/* keep last */
	ATH10K_PCI_FEATURE_COUNT
	};

	/* 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 *ar_pci;
	struct tasklet_struct intr;
	};

	struct ath10k_pci {
	struct pci_dev *pdev;
	struct device *dev;
	struct ath10k *ar;
	void __iomem *mem;

	DECLARE_BITMAP(features, ATH10K_PCI_FEATURE_COUNT);

	/*
	* Number of MSI interrupts granted, 0 --> using legacy PCI line
	* interrupts.
	*/
	int num_msi_intrs;

	struct tasklet_struct intr_tq;
	struct tasklet_struct msi_fw_err;
	struct tasklet_struct early_irq_tasklet;

	int started;

	atomic_t keep_awake_count;
	bool verified_awake;

	struct ath10k_pci_pipe pipe_info[CE_COUNT_MAX];

	struct ath10k_hif_cb msg_callbacks_current;

	/* Target address used to signal a pending firmware event */
	u32 fw_indicator_address;

	/* Copy Engine used for Diagnostic Accesses */
	struct ath10k_ce_pipe *ce_diag;

	/* FIXME: document what this really protects */
	spinlock_t ce_lock;

	/* Map CE id to ce_state */
	struct ath10k_ce_pipe ce_states[CE_COUNT_MAX];
	};

	static inline struct ath10k_pci ath10k_pci_priv(struct ath10k ar)
	{
	return ar->hif.priv;
	}

	static inline u32 ath10k_pci_reg_read32(struct ath10k *ar, u32 addr)
	{
	struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);

	return ioread32(ar_pci->mem + PCIE_LOCAL_BASE_ADDRESS + addr);
	}

	static inline void ath10k_pci_reg_write32(struct ath10k *ar, u32 addr, u32 val)
	{
	struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);

	iowrite32(val, ar_pci->mem + PCIE_LOCAL_BASE_ADDRESS + addr);
	}

	#define ATH_PCI_RESET_WAIT_MAX 10 /* ms */
	#define PCIE_WAKE_TIMEOUT 5000 /* 5ms */

	#define BAR_NUM 0

	#define CDC_WAR_MAGIC_STR 0xceef0000
	#define CDC_WAR_DATA_CE 4

	/*
	* TODO: Should be a function call specific to each Target-type.
	* This convoluted macro converts from Target CPU Virtual Address Space to CE
	* Address Space. As part of this process, we conservatively fetch the current
	* PCIE_BAR. MOST of the time, this should match the upper bits of PCI space
	* for this device; but that's not guaranteed.
	*/
	#define TARG_CPU_SPACE_TO_CE_SPACE(ar, pci_addr, addr) \
	(((ioread32((pci_addr)+(SOC_CORE_BASE_ADDRESS\| \
	CORE_CTRL_ADDRESS)) & 0x7ff) << 21) \| \
	0x100000 \| ((addr) & 0xfffff))

	/* Wait up to this many Ms for a Diagnostic Access CE operation to complete */
	#define DIAG_ACCESS_CE_TIMEOUT_MS 10

	/*
	* This API allows the Host to access Target registers directly
	* and relatively efficiently over PCIe.
	* This allows the Host to avoid extra overhead associated with
	* sending a message to firmware and waiting for a response message
	* from firmware, as is done on other interconnects.
	*
	* Yet there is some complexity with direct accesses because the
	* Target's power state is not known a priori. The Host must issue
	* special PCIe reads/writes in order to explicitly wake the Target
	* and to verify that it is awake and will remain awake.
	*
	* Usage:
	*
	* Use ath10k_pci_read32 and ath10k_pci_write32 to access Target space.
	* These calls must be bracketed by ath10k_pci_wake and
	* ath10k_pci_sleep. A single BEGIN/END pair is adequate for
	* multiple READ/WRITE operations.
	*
	* Use ath10k_pci_wake to put the Target in a state in
	* which it is legal for the Host to directly access it. This
	* may involve waking the Target from a low power state, which
	* may take up to 2Ms!
	*
	* Use ath10k_pci_sleep to tell the Target that as far as
	* this code path is concerned, it no longer needs to remain
	* directly accessible. BEGIN/END is under a reference counter;
	* multiple code paths may issue BEGIN/END on a single targid.
	*/
	static inline void ath10k_pci_write32(struct ath10k *ar, u32 offset,
	u32 value)
	{
	struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);

	iowrite32(value, ar_pci->mem + offset);
	}

	static inline u32 ath10k_pci_read32(struct ath10k *ar, u32 offset)
	{
	struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);

	return ioread32(ar_pci->mem + offset);
	}

	static inline u32 ath10k_pci_soc_read32(struct ath10k *ar, u32 addr)
	{
	return ath10k_pci_read32(ar, RTC_SOC_BASE_ADDRESS + addr);
	}

	static inline void ath10k_pci_soc_write32(struct ath10k *ar, u32 addr, u32 val)
	{
	ath10k_pci_write32(ar, RTC_SOC_BASE_ADDRESS + addr, val);
	}

	int ath10k_do_pci_wake(struct ath10k *ar);
	void ath10k_do_pci_sleep(struct ath10k *ar);

	static inline int ath10k_pci_wake(struct ath10k *ar)
	{
	struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);

	if (test_bit(ATH10K_PCI_FEATURE_SOC_POWER_SAVE, ar_pci->features))
	return ath10k_do_pci_wake(ar);

	return 0;
	}

	static inline void ath10k_pci_sleep(struct ath10k *ar)
	{
	struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);

	if (test_bit(ATH10K_PCI_FEATURE_SOC_POWER_SAVE, ar_pci->features))
	ath10k_do_pci_sleep(ar);
	}

	#endif /* _PCI_H_ */