| /* |
| * Copyright (c) 2013-2016 The Linux Foundation. All rights reserved. |
| * |
| * Previously licensed under the ISC license by 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. |
| */ |
| |
| /* |
| * This file was originally distributed by Qualcomm Atheros, Inc. |
| * under proprietary terms before Copyright ownership was assigned |
| * to the Linux Foundation. |
| */ |
| |
| #ifndef __ATH_PCI_H__ |
| #define __ATH_PCI_H__ |
| |
| #include <linux/version.h> |
| #include <linux/semaphore.h> |
| #include <linux/interrupt.h> |
| |
| #define ATH_DBG_DEFAULT 0 |
| #include <ol_if_athvar.h> |
| #include "hif.h" |
| #include "cepci.h" |
| #include "ce_main.h" |
| |
| /* An address (e.g. of a buffer) in Copy Engine space. */ |
| |
| #define HIF_MAX_TASKLET_NUM 11 |
| struct hif_tasklet_entry { |
| uint8_t id; /* 0 - 9: maps to CE, 10: fw */ |
| void *hif_handler; /* struct hif_pci_softc */ |
| }; |
| |
| /** |
| * enum hif_pm_runtime_state - Driver States for Runtime Power Management |
| * HIF_PM_RUNTIME_STATE_NONE: runtime pm is off |
| * HIF_PM_RUNTIME_STATE_ON: runtime pm is active and link is active |
| * HIF_PM_RUNTIME_STATE_INPROGRESS: a runtime suspend or resume is in progress |
| * HIF_PM_RUNTIME_STATE_SUSPENDED: the driver is runtime suspended |
| */ |
| enum hif_pm_runtime_state { |
| HIF_PM_RUNTIME_STATE_NONE, |
| HIF_PM_RUNTIME_STATE_ON, |
| HIF_PM_RUNTIME_STATE_INPROGRESS, |
| HIF_PM_RUNTIME_STATE_SUSPENDED, |
| }; |
| |
| #ifdef FEATURE_RUNTIME_PM |
| |
| /** |
| * struct hif_pm_runtime_lock - data structure for preventing runtime suspend |
| * @list - global list of runtime locks |
| * @active - true if this lock is preventing suspend |
| * @name - character string for tracking this lock |
| */ |
| struct hif_pm_runtime_lock { |
| struct list_head list; |
| bool active; |
| uint32_t timeout; |
| const char *name; |
| }; |
| |
| /* Debugging stats for Runtime PM */ |
| struct hif_pci_pm_stats { |
| u32 suspended; |
| u32 suspend_err; |
| u32 resumed; |
| u32 runtime_get; |
| u32 runtime_put; |
| u32 request_resume; |
| u32 allow_suspend; |
| u32 prevent_suspend; |
| u32 prevent_suspend_timeout; |
| u32 allow_suspend_timeout; |
| u32 runtime_get_err; |
| void *last_resume_caller; |
| unsigned long suspend_jiffies; |
| }; |
| #endif |
| |
| /** |
| * struct hif_msi_info - Structure to hold msi info |
| * @magic: cookie |
| * @magic_da: dma address |
| * @dmaContext: dma address |
| * |
| * Structure to hold MSI information for PCIe interrupts |
| */ |
| struct hif_msi_info { |
| void *magic; |
| dma_addr_t magic_da; |
| OS_DMA_MEM_CONTEXT(dmacontext) |
| }; |
| |
| struct hif_pci_softc { |
| struct HIF_CE_state ce_sc; |
| void __iomem *mem; /* PCI address. */ |
| /* For efficiency, should be first in struct */ |
| |
| struct device *dev; |
| struct pci_dev *pdev; |
| int num_msi_intrs; /* number of MSI interrupts granted */ |
| /* 0 --> using legacy PCI line interrupts */ |
| struct tasklet_struct intr_tq; /* tasklet */ |
| |
| struct hif_msi_info msi_info; |
| int irq; |
| int irq_event; |
| int cacheline_sz; |
| u16 devid; |
| qdf_dma_addr_t soc_pcie_bar0; |
| struct hif_tasklet_entry tasklet_entries[HIF_MAX_TASKLET_NUM]; |
| bool pci_enabled; |
| qdf_spinlock_t irq_lock; |
| qdf_work_t reschedule_tasklet_work; |
| uint32_t lcr_val; |
| #ifdef FEATURE_RUNTIME_PM |
| atomic_t pm_state; |
| uint32_t prevent_suspend_cnt; |
| struct hif_pci_pm_stats pm_stats; |
| struct work_struct pm_work; |
| spinlock_t runtime_lock; |
| struct timer_list runtime_timer; |
| struct list_head prevent_suspend_list; |
| unsigned long runtime_timer_expires; |
| struct hif_pm_runtime_lock *prevent_linkdown_lock; |
| #ifdef WLAN_OPEN_SOURCE |
| struct dentry *pm_dentry; |
| #endif |
| #endif |
| }; |
| |
| bool hif_pci_targ_is_present(struct hif_softc *scn, void *__iomem *mem); |
| int hif_configure_irq(struct hif_softc *sc); |
| void hif_pci_cancel_deferred_target_sleep(struct hif_softc *scn); |
| |
| /* |
| * A firmware interrupt to the Host is indicated by the |
| * low bit of SCRATCH_3_ADDRESS being set. |
| */ |
| #define FW_EVENT_PENDING_REG_ADDRESS SCRATCH_3_ADDRESS |
| |
| /* |
| * Typically, MSI Interrupts are used with PCIe. To force use of legacy |
| * "ABCD" PCI line interrupts rather than MSI, define |
| * FORCE_LEGACY_PCI_INTERRUPTS. |
| * Even when NOT forced, the driver may attempt to use legacy PCI interrupts |
| * MSI allocation fails |
| */ |
| #define LEGACY_INTERRUPTS(sc) ((sc)->num_msi_intrs == 0) |
| |
| /* |
| * There may be some pending tx frames during platform suspend. |
| * Suspend operation should be delayed until those tx frames are |
| * transfered from the host to target. This macro specifies how |
| * long suspend thread has to sleep before checking pending tx |
| * frame count. |
| */ |
| #define OL_ATH_TX_DRAIN_WAIT_DELAY 50 /* ms */ |
| |
| #define HIF_CE_DRAIN_WAIT_DELAY 10 /* ms */ |
| /* |
| * Wait time (in unit of OL_ATH_TX_DRAIN_WAIT_DELAY) for pending |
| * tx frame completion before suspend. Refer: hif_pci_suspend() |
| */ |
| #ifndef QCA_WIFI_3_0_EMU |
| #define OL_ATH_TX_DRAIN_WAIT_CNT 10 |
| #else |
| #define OL_ATH_TX_DRAIN_WAIT_CNT 60 |
| #endif |
| |
| #define HIF_CE_DRAIN_WAIT_CNT 20 |
| |
| |
| #ifdef FEATURE_RUNTIME_PM |
| #include <linux/pm_runtime.h> |
| |
| #ifdef WLAN_OPEN_SOURCE |
| static inline int hif_pm_request_resume(struct device *dev) |
| { |
| return pm_request_resume(dev); |
| } |
| static inline int __hif_pm_runtime_get(struct device *dev) |
| { |
| return pm_runtime_get(dev); |
| } |
| |
| static inline int hif_pm_runtime_put_auto(struct device *dev) |
| { |
| return pm_runtime_put_autosuspend(dev); |
| } |
| |
| static inline void hif_pm_runtime_mark_last_busy(struct device *dev) |
| { |
| pm_runtime_mark_last_busy(dev); |
| } |
| |
| static inline int hif_pm_runtime_resume(struct device *dev) |
| { |
| return pm_runtime_resume(dev); |
| } |
| #else |
| static inline int hif_pm_request_resume(struct device *dev) |
| { |
| return cnss_pm_runtime_request(dev, CNSS_PM_REQUEST_RESUME); |
| } |
| |
| static inline int __hif_pm_runtime_get(struct device *dev) |
| { |
| return cnss_pm_runtime_request(dev, CNSS_PM_RUNTIME_GET); |
| } |
| |
| static inline int hif_pm_runtime_put_auto(struct device *dev) |
| { |
| return cnss_pm_runtime_request(dev, CNSS_PM_RUNTIME_PUT_AUTO); |
| } |
| |
| static inline void hif_pm_runtime_mark_last_busy(struct device *dev) |
| { |
| cnss_pm_runtime_request(dev, CNSS_PM_RUNTIME_MARK_LAST_BUSY); |
| } |
| static inline int hif_pm_runtime_resume(struct device *dev) |
| { |
| return cnss_pm_runtime_request(dev, CNSS_PM_RUNTIME_RESUME); |
| } |
| #endif /* WLAN_OPEN_SOURCE */ |
| #else |
| static inline void hif_pm_runtime_mark_last_busy(struct device *dev) { } |
| #endif /* FEATURE_RUNTIME_PM */ |
| #endif /* __ATH_PCI_H__ */ |