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Diffstat (limited to 'include/linux/msm_pcie.h')
| -rw-r--r-- | include/linux/msm_pcie.h | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/include/linux/msm_pcie.h b/include/linux/msm_pcie.h new file mode 100644 index 000000000000..c9c467ff7428 --- /dev/null +++ b/include/linux/msm_pcie.h @@ -0,0 +1,217 @@ +/* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 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. + */ + +#ifndef __MSM_PCIE_H +#define __MSM_PCIE_H + +#include <linux/types.h> +#include <linux/pci.h> + +enum msm_pcie_config { + MSM_PCIE_CONFIG_INVALID = 0, + MSM_PCIE_CONFIG_NO_CFG_RESTORE = 0x1, + MSM_PCIE_CONFIG_LINKDOWN = 0x2, + MSM_PCIE_CONFIG_NO_RECOVERY = 0x4, +}; + +enum msm_pcie_pm_opt { + MSM_PCIE_SUSPEND, + MSM_PCIE_RESUME, + MSM_PCIE_DISABLE_PC, + MSM_PCIE_ENABLE_PC, +}; + +enum msm_pcie_event { + MSM_PCIE_EVENT_INVALID = 0, + MSM_PCIE_EVENT_LINKDOWN = 0x1, + MSM_PCIE_EVENT_LINKUP = 0x2, + MSM_PCIE_EVENT_WAKEUP = 0x4, +}; + +enum msm_pcie_trigger { + MSM_PCIE_TRIGGER_CALLBACK, + MSM_PCIE_TRIGGER_COMPLETION, +}; + +struct msm_pcie_notify { + enum msm_pcie_event event; + void *user; + void *data; + u32 options; +}; + +struct msm_pcie_register_event { + u32 events; + void *user; + enum msm_pcie_trigger mode; + void (*callback)(struct msm_pcie_notify *notify); + struct msm_pcie_notify notify; + struct completion *completion; + u32 options; +}; + +#ifdef CONFIG_PCI_MSM +/** + * msm_pcie_pm_control - control the power state of a PCIe link. + * @pm_opt: power management operation + * @busnr: bus number of PCIe endpoint + * @user: handle of the caller + * @data: private data from the caller + * @options: options for pm control + * + * This function gives PCIe endpoint device drivers the control to change + * the power state of a PCIe link for their device. + * + * Return: 0 on success, negative value on error + */ +int msm_pcie_pm_control(enum msm_pcie_pm_opt pm_opt, u32 busnr, void *user, + void *data, u32 options); + +/** + * msm_pcie_register_event - register an event with PCIe bus driver. + * @reg: event structure + * + * This function gives PCIe endpoint device drivers an option to register + * events with PCIe bus driver. + * + * Return: 0 on success, negative value on error + */ +int msm_pcie_register_event(struct msm_pcie_register_event *reg); + +/** + * msm_pcie_deregister_event - deregister an event with PCIe bus driver. + * @reg: event structure + * + * This function gives PCIe endpoint device drivers an option to deregister + * events with PCIe bus driver. + * + * Return: 0 on success, negative value on error + */ +int msm_pcie_deregister_event(struct msm_pcie_register_event *reg); + +/** + * msm_pcie_recover_config - recover config space. + * @dev: pci device structure + * + * This function recovers the config space of both RC and Endpoint. + * + * Return: 0 on success, negative value on error + */ +int msm_pcie_recover_config(struct pci_dev *dev); + +/** + * msm_pcie_enumerate - enumerate Endpoints. + * @rc_idx: RC that Endpoints connect to. + * + * This function enumerates Endpoints connected to RC. + * + * Return: 0 on success, negative value on error + */ +int msm_pcie_enumerate(u32 rc_idx); + +/** + * msm_pcie_recover_config - recover config space. + * @dev: pci device structure + * + * This function recovers the config space of both RC and Endpoint. + * + * Return: 0 on success, negative value on error + */ +int msm_pcie_recover_config(struct pci_dev *dev); + +/** + * msm_pcie_shadow_control - control the shadowing of PCIe config space. + * @dev: pci device structure + * @enable: shadowing should be enabled or disabled + * + * This function gives PCIe endpoint device drivers the control to enable + * or disable the shadowing of PCIe config space. + * + * Return: 0 on success, negative value on error + */ +int msm_pcie_shadow_control(struct pci_dev *dev, bool enable); + +/* + * msm_pcie_debug_info - run a PCIe specific debug testcase. + * @dev: pci device structure + * @option: specifies which PCIe debug testcase to execute + * @base: PCIe specific range + * @offset: offset of destination register + * @mask: mask the bit(s) of destination register + * @value: value to be written to destination register + * + * This function gives PCIe endpoint device drivers the control to + * run a debug testcase. + * + * Return: 0 on success, negative value on error + */ +int msm_pcie_debug_info(struct pci_dev *dev, u32 option, u32 base, + u32 offset, u32 mask, u32 value); + +/* + * msm_pcie_configure_sid - calculates the SID for a PCIe endpoint. + * @dev: device structure + * @sid: the calculated SID + * @domain: the domain number of the Root Complex + * + * This function calculates the SID for a PCIe endpoint device. + * + * Return: 0 on success, negative value on error + */ +int msm_pcie_configure_sid(struct device *dev, u32 *sid, + int *domain); +#else /* !CONFIG_PCI_MSM */ +static inline int msm_pcie_pm_control(enum msm_pcie_pm_opt pm_opt, u32 busnr, + void *user, void *data, u32 options) +{ + return -ENODEV; +} + +static inline int msm_pcie_register_event(struct msm_pcie_register_event *reg) +{ + return -ENODEV; +} + +static inline int msm_pcie_deregister_event(struct msm_pcie_register_event *reg) +{ + return -ENODEV; +} + +static inline int msm_pcie_recover_config(struct pci_dev *dev) +{ + return -ENODEV; +} + +static inline int msm_pcie_enumerate(u32 rc_idx) +{ + return -ENODEV; +} + +static inline int msm_pcie_shadow_control(struct pci_dev *dev, bool enable) +{ + return -ENODEV; +} + +static inline int msm_pcie_debug_info(struct pci_dev *dev, u32 option, u32 base, + u32 offset, u32 mask, u32 value) +{ + return -ENODEV; +} + +static inline int msm_pcie_configure_sid(struct device *dev, u32 *sid, + int *domain) +{ + return -ENODEV; +} +#endif /* CONFIG_PCI_MSM */ + +#endif /* __MSM_PCIE_H */ |