| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Hao Wu | 1195 | 67.97% | 11 | 44.00% |
| Xiao Guangrong | 237 | 13.48% | 1 | 4.00% |
| Xu Yilun | 216 | 12.29% | 7 | 28.00% |
| Basheer Ahmed Muddebihal | 78 | 4.44% | 1 | 4.00% |
| Matthew Gerlach | 27 | 1.54% | 2 | 8.00% |
| Martin Hundeböll | 3 | 0.17% | 1 | 4.00% |
| Linus Torvalds | 1 | 0.06% | 1 | 4.00% |
| Gustavo A. R. Silva | 1 | 0.06% | 1 | 4.00% |
| Total | 1758 | 25 |
/* SPDX-License-Identifier: GPL-2.0 */ /* * Driver Header File for FPGA Device Feature List (DFL) Support * * Copyright (C) 2017-2018 Intel Corporation, Inc. * * Authors: * Kang Luwei <luwei.kang@intel.com> * Zhang Yi <yi.z.zhang@intel.com> * Wu Hao <hao.wu@intel.com> * Xiao Guangrong <guangrong.xiao@linux.intel.com> */ #ifndef __FPGA_DFL_H #define __FPGA_DFL_H #include <linux/bitfield.h> #include <linux/cdev.h> #include <linux/delay.h> #include <linux/eventfd.h> #include <linux/fs.h> #include <linux/interrupt.h> #include <linux/iopoll.h> #include <linux/io-64-nonatomic-lo-hi.h> #include <linux/mod_devicetable.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/uuid.h> #include <linux/fpga/fpga-region.h> /* maximum supported number of ports */ #define MAX_DFL_FPGA_PORT_NUM 4 /* plus one for fme device */ #define MAX_DFL_FEATURE_DEV_NUM (MAX_DFL_FPGA_PORT_NUM + 1) /* Reserved 0xfe for Header Group Register and 0xff for AFU */ #define FEATURE_ID_FIU_HEADER 0xfe #define FEATURE_ID_AFU 0xff #define FME_FEATURE_ID_HEADER FEATURE_ID_FIU_HEADER #define FME_FEATURE_ID_THERMAL_MGMT 0x1 #define FME_FEATURE_ID_POWER_MGMT 0x2 #define FME_FEATURE_ID_GLOBAL_IPERF 0x3 #define FME_FEATURE_ID_GLOBAL_ERR 0x4 #define FME_FEATURE_ID_PR_MGMT 0x5 #define FME_FEATURE_ID_HSSI 0x6 #define FME_FEATURE_ID_GLOBAL_DPERF 0x7 #define PORT_FEATURE_ID_HEADER FEATURE_ID_FIU_HEADER #define PORT_FEATURE_ID_AFU FEATURE_ID_AFU #define PORT_FEATURE_ID_ERROR 0x10 #define PORT_FEATURE_ID_UMSG 0x11 #define PORT_FEATURE_ID_UINT 0x12 #define PORT_FEATURE_ID_STP 0x13 /* * Device Feature Header Register Set * * For FIUs, they all have DFH + GUID + NEXT_AFU as common header registers. * For AFUs, they have DFH + GUID as common header registers. * For private features, they only have DFH register as common header. */ #define DFH 0x0 #define GUID_L 0x8 #define GUID_H 0x10 #define NEXT_AFU 0x18 #define DFH_SIZE 0x8 /* Device Feature Header Register Bitfield */ #define DFH_ID GENMASK_ULL(11, 0) /* Feature ID */ #define DFH_ID_FIU_FME 0 #define DFH_ID_FIU_PORT 1 #define DFH_REVISION GENMASK_ULL(15, 12) /* Feature revision */ #define DFH_NEXT_HDR_OFST GENMASK_ULL(39, 16) /* Offset to next DFH */ #define DFH_EOL BIT_ULL(40) /* End of list */ #define DFH_VERSION GENMASK_ULL(59, 52) /* DFH version */ #define DFH_TYPE GENMASK_ULL(63, 60) /* Feature type */ #define DFH_TYPE_AFU 1 #define DFH_TYPE_PRIVATE 3 #define DFH_TYPE_FIU 4 /* * DFHv1 Register Offset definitons * In DHFv1, DFH + GUID + CSR_START + CSR_SIZE_GROUP + PARAM_HDR + PARAM_DATA * as common header registers */ #define DFHv1_CSR_ADDR 0x18 /* CSR Register start address */ #define DFHv1_CSR_SIZE_GRP 0x20 /* Size of Reg Block and Group/tag */ #define DFHv1_PARAM_HDR 0x28 /* Optional First Param header */ /* * CSR Rel Bit, 1'b0 = relative (offset from feature DFH start), * 1'b1 = absolute (ARM or other non-PCIe use) */ #define DFHv1_CSR_ADDR_REL BIT_ULL(0) /* CSR Header Register Bit Definitions */ #define DFHv1_CSR_ADDR_MASK GENMASK_ULL(63, 1) /* 63:1 of CSR address */ /* CSR SIZE Goup Register Bit Definitions */ #define DFHv1_CSR_SIZE_GRP_INSTANCE_ID GENMASK_ULL(15, 0) /* Enumeration instantiated IP */ #define DFHv1_CSR_SIZE_GRP_GROUPING_ID GENMASK_ULL(30, 16) /* Group Features/interfaces */ #define DFHv1_CSR_SIZE_GRP_HAS_PARAMS BIT_ULL(31) /* Presence of Parameters */ #define DFHv1_CSR_SIZE_GRP_SIZE GENMASK_ULL(63, 32) /* Size of CSR Block in bytes */ /* PARAM Header Register Bit Definitions */ #define DFHv1_PARAM_HDR_ID GENMASK_ULL(15, 0) /* Id of this Param */ #define DFHv1_PARAM_HDR_VER GENMASK_ULL(31, 16) /* Version Param */ #define DFHv1_PARAM_HDR_NEXT_OFFSET GENMASK_ULL(63, 35) /* Offset of next Param */ #define DFHv1_PARAM_HDR_NEXT_EOP BIT_ULL(32) #define DFHv1_PARAM_DATA 0x08 /* Offset of Param data from Param header */ #define DFHv1_PARAM_ID_MSI_X 0x1 #define DFHv1_PARAM_MSI_X_NUMV GENMASK_ULL(63, 32) #define DFHv1_PARAM_MSI_X_STARTV GENMASK_ULL(31, 0) /* Next AFU Register Bitfield */ #define NEXT_AFU_NEXT_DFH_OFST GENMASK_ULL(23, 0) /* Offset to next AFU */ /* FME Header Register Set */ #define FME_HDR_DFH DFH #define FME_HDR_GUID_L GUID_L #define FME_HDR_GUID_H GUID_H #define FME_HDR_NEXT_AFU NEXT_AFU #define FME_HDR_CAP 0x30 #define FME_HDR_PORT_OFST(n) (0x38 + ((n) * 0x8)) #define FME_PORT_OFST_BAR_SKIP 7 #define FME_HDR_BITSTREAM_ID 0x60 #define FME_HDR_BITSTREAM_MD 0x68 /* FME Fab Capability Register Bitfield */ #define FME_CAP_FABRIC_VERID GENMASK_ULL(7, 0) /* Fabric version ID */ #define FME_CAP_SOCKET_ID BIT_ULL(8) /* Socket ID */ #define FME_CAP_PCIE0_LINK_AVL BIT_ULL(12) /* PCIE0 Link */ #define FME_CAP_PCIE1_LINK_AVL BIT_ULL(13) /* PCIE1 Link */ #define FME_CAP_COHR_LINK_AVL BIT_ULL(14) /* Coherent Link */ #define FME_CAP_IOMMU_AVL BIT_ULL(16) /* IOMMU available */ #define FME_CAP_NUM_PORTS GENMASK_ULL(19, 17) /* Number of ports */ #define FME_CAP_ADDR_WIDTH GENMASK_ULL(29, 24) /* Address bus width */ #define FME_CAP_CACHE_SIZE GENMASK_ULL(43, 32) /* cache size in KB */ #define FME_CAP_CACHE_ASSOC GENMASK_ULL(47, 44) /* Associativity */ /* FME Port Offset Register Bitfield */ /* Offset to port device feature header */ #define FME_PORT_OFST_DFH_OFST GENMASK_ULL(23, 0) /* PCI Bar ID for this port */ #define FME_PORT_OFST_BAR_ID GENMASK_ULL(34, 32) /* AFU MMIO access permission. 1 - VF, 0 - PF. */ #define FME_PORT_OFST_ACC_CTRL BIT_ULL(55) #define FME_PORT_OFST_ACC_PF 0 #define FME_PORT_OFST_ACC_VF 1 #define FME_PORT_OFST_IMP BIT_ULL(60) /* FME Error Capability Register */ #define FME_ERROR_CAP 0x70 /* FME Error Capability Register Bitfield */ #define FME_ERROR_CAP_SUPP_INT BIT_ULL(0) /* Interrupt Support */ #define FME_ERROR_CAP_INT_VECT GENMASK_ULL(12, 1) /* Interrupt vector */ /* PORT Header Register Set */ #define PORT_HDR_DFH DFH #define PORT_HDR_GUID_L GUID_L #define PORT_HDR_GUID_H GUID_H #define PORT_HDR_NEXT_AFU NEXT_AFU #define PORT_HDR_CAP 0x30 #define PORT_HDR_CTRL 0x38 #define PORT_HDR_STS 0x40 #define PORT_HDR_USRCLK_CMD0 0x50 #define PORT_HDR_USRCLK_CMD1 0x58 #define PORT_HDR_USRCLK_STS0 0x60 #define PORT_HDR_USRCLK_STS1 0x68 /* Port Capability Register Bitfield */ #define PORT_CAP_PORT_NUM GENMASK_ULL(1, 0) /* ID of this port */ #define PORT_CAP_MMIO_SIZE GENMASK_ULL(23, 8) /* MMIO size in KB */ #define PORT_CAP_SUPP_INT_NUM GENMASK_ULL(35, 32) /* Interrupts num */ /* Port Control Register Bitfield */ #define PORT_CTRL_SFTRST BIT_ULL(0) /* Port soft reset */ /* Latency tolerance reporting. '1' >= 40us, '0' < 40us.*/ #define PORT_CTRL_LATENCY BIT_ULL(2) #define PORT_CTRL_SFTRST_ACK BIT_ULL(4) /* HW ack for reset */ /* Port Status Register Bitfield */ #define PORT_STS_AP2_EVT BIT_ULL(13) /* AP2 event detected */ #define PORT_STS_AP1_EVT BIT_ULL(12) /* AP1 event detected */ #define PORT_STS_PWR_STATE GENMASK_ULL(11, 8) /* AFU power states */ #define PORT_STS_PWR_STATE_NORM 0 #define PORT_STS_PWR_STATE_AP1 1 /* 50% throttling */ #define PORT_STS_PWR_STATE_AP2 2 /* 90% throttling */ #define PORT_STS_PWR_STATE_AP6 6 /* 100% throttling */ /* Port Error Capability Register */ #define PORT_ERROR_CAP 0x38 /* Port Error Capability Register Bitfield */ #define PORT_ERROR_CAP_SUPP_INT BIT_ULL(0) /* Interrupt Support */ #define PORT_ERROR_CAP_INT_VECT GENMASK_ULL(12, 1) /* Interrupt vector */ /* Port Uint Capability Register */ #define PORT_UINT_CAP 0x8 /* Port Uint Capability Register Bitfield */ #define PORT_UINT_CAP_INT_NUM GENMASK_ULL(11, 0) /* Interrupts num */ #define PORT_UINT_CAP_FST_VECT GENMASK_ULL(23, 12) /* First Vector */ /** * struct dfl_fpga_port_ops - port ops * * @name: name of this port ops, to match with port platform device. * @owner: pointer to the module which owns this port ops. * @node: node to link port ops to global list. * @get_id: get port id from hardware. * @enable_set: enable/disable the port. */ struct dfl_fpga_port_ops { const char *name; struct module *owner; struct list_head node; int (*get_id)(struct platform_device *pdev); int (*enable_set)(struct platform_device *pdev, bool enable); }; void dfl_fpga_port_ops_add(struct dfl_fpga_port_ops *ops); void dfl_fpga_port_ops_del(struct dfl_fpga_port_ops *ops); struct dfl_fpga_port_ops *dfl_fpga_port_ops_get(struct platform_device *pdev); void dfl_fpga_port_ops_put(struct dfl_fpga_port_ops *ops); int dfl_fpga_check_port_id(struct platform_device *pdev, void *pport_id); /** * struct dfl_feature_id - dfl private feature id * * @id: unique dfl private feature id. */ struct dfl_feature_id { u16 id; }; /** * struct dfl_feature_driver - dfl private feature driver * * @id_table: id_table for dfl private features supported by this driver. * @ops: ops of this dfl private feature driver. */ struct dfl_feature_driver { const struct dfl_feature_id *id_table; const struct dfl_feature_ops *ops; }; /** * struct dfl_feature_irq_ctx - dfl private feature interrupt context * * @irq: Linux IRQ number of this interrupt. * @trigger: eventfd context to signal when interrupt happens. * @name: irq name needed when requesting irq. */ struct dfl_feature_irq_ctx { int irq; struct eventfd_ctx *trigger; char *name; }; /** * struct dfl_feature - sub feature of the feature devices * * @dev: ptr to pdev of the feature device which has the sub feature. * @id: sub feature id. * @revision: revision of this sub feature. * @resource_index: each sub feature has one mmio resource for its registers. * this index is used to find its mmio resource from the * feature dev (platform device)'s resources. * @ioaddr: mapped mmio resource address. * @irq_ctx: interrupt context list. * @nr_irqs: number of interrupt contexts. * @ops: ops of this sub feature. * @ddev: ptr to the dfl device of this sub feature. * @priv: priv data of this feature. * @dfh_version: version of the DFH * @param_size: size of dfh parameters * @params: point to memory copy of dfh parameters */ struct dfl_feature { struct platform_device *dev; u16 id; u8 revision; int resource_index; void __iomem *ioaddr; struct dfl_feature_irq_ctx *irq_ctx; unsigned int nr_irqs; const struct dfl_feature_ops *ops; struct dfl_device *ddev; void *priv; u8 dfh_version; unsigned int param_size; void *params; }; #define FEATURE_DEV_ID_UNUSED (-1) /** * struct dfl_feature_platform_data - platform data for feature devices * * @node: node to link feature devs to container device's port_dev_list. * @lock: mutex to protect platform data. * @cdev: cdev of feature dev. * @dev: ptr to platform device linked with this platform data. * @dfl_cdev: ptr to container device. * @id: id used for this feature device. * @disable_count: count for port disable. * @excl_open: set on feature device exclusive open. * @open_count: count for feature device open. * @num: number for sub features. * @private: ptr to feature dev private data. * @features: sub features of this feature dev. */ struct dfl_feature_platform_data { struct list_head node; struct mutex lock; struct cdev cdev; struct platform_device *dev; struct dfl_fpga_cdev *dfl_cdev; int id; unsigned int disable_count; bool excl_open; int open_count; void *private; int num; struct dfl_feature features[]; }; static inline int dfl_feature_dev_use_begin(struct dfl_feature_platform_data *pdata, bool excl) { if (pdata->excl_open) return -EBUSY; if (excl) { if (pdata->open_count) return -EBUSY; pdata->excl_open = true; } pdata->open_count++; return 0; } static inline void dfl_feature_dev_use_end(struct dfl_feature_platform_data *pdata) { pdata->excl_open = false; if (WARN_ON(pdata->open_count <= 0)) return; pdata->open_count--; } static inline int dfl_feature_dev_use_count(struct dfl_feature_platform_data *pdata) { return pdata->open_count; } static inline void dfl_fpga_pdata_set_private(struct dfl_feature_platform_data *pdata, void *private) { pdata->private = private; } static inline void *dfl_fpga_pdata_get_private(struct dfl_feature_platform_data *pdata) { return pdata->private; } struct dfl_feature_ops { int (*init)(struct platform_device *pdev, struct dfl_feature *feature); void (*uinit)(struct platform_device *pdev, struct dfl_feature *feature); long (*ioctl)(struct platform_device *pdev, struct dfl_feature *feature, unsigned int cmd, unsigned long arg); }; #define DFL_FPGA_FEATURE_DEV_FME "dfl-fme" #define DFL_FPGA_FEATURE_DEV_PORT "dfl-port" void dfl_fpga_dev_feature_uinit(struct platform_device *pdev); int dfl_fpga_dev_feature_init(struct platform_device *pdev, struct dfl_feature_driver *feature_drvs); int dfl_fpga_dev_ops_register(struct platform_device *pdev, const struct file_operations *fops, struct module *owner); void dfl_fpga_dev_ops_unregister(struct platform_device *pdev); static inline struct platform_device *dfl_fpga_inode_to_feature_dev(struct inode *inode) { struct dfl_feature_platform_data *pdata; pdata = container_of(inode->i_cdev, struct dfl_feature_platform_data, cdev); return pdata->dev; } #define dfl_fpga_dev_for_each_feature(pdata, feature) \ for ((feature) = (pdata)->features; \ (feature) < (pdata)->features + (pdata)->num; (feature)++) static inline struct dfl_feature *dfl_get_feature_by_id(struct device *dev, u16 id) { struct dfl_feature_platform_data *pdata = dev_get_platdata(dev); struct dfl_feature *feature; dfl_fpga_dev_for_each_feature(pdata, feature) if (feature->id == id) return feature; return NULL; } static inline void __iomem *dfl_get_feature_ioaddr_by_id(struct device *dev, u16 id) { struct dfl_feature *feature = dfl_get_feature_by_id(dev, id); if (feature && feature->ioaddr) return feature->ioaddr; WARN_ON(1); return NULL; } static inline bool is_dfl_feature_present(struct device *dev, u16 id) { return !!dfl_get_feature_ioaddr_by_id(dev, id); } static inline struct device *dfl_fpga_pdata_to_parent(struct dfl_feature_platform_data *pdata) { return pdata->dev->dev.parent->parent; } static inline bool dfl_feature_is_fme(void __iomem *base) { u64 v = readq(base + DFH); return (FIELD_GET(DFH_TYPE, v) == DFH_TYPE_FIU) && (FIELD_GET(DFH_ID, v) == DFH_ID_FIU_FME); } static inline bool dfl_feature_is_port(void __iomem *base) { u64 v = readq(base + DFH); return (FIELD_GET(DFH_TYPE, v) == DFH_TYPE_FIU) && (FIELD_GET(DFH_ID, v) == DFH_ID_FIU_PORT); } static inline u8 dfl_feature_revision(void __iomem *base) { return (u8)FIELD_GET(DFH_REVISION, readq(base + DFH)); } /** * struct dfl_fpga_enum_info - DFL FPGA enumeration information * * @dev: parent device. * @dfls: list of device feature lists. * @nr_irqs: number of irqs for all feature devices. * @irq_table: Linux IRQ numbers for all irqs, indexed by hw irq numbers. */ struct dfl_fpga_enum_info { struct device *dev; struct list_head dfls; unsigned int nr_irqs; int *irq_table; }; /** * struct dfl_fpga_enum_dfl - DFL FPGA enumeration device feature list info * * @start: base address of this device feature list. * @len: size of this device feature list. * @node: node in list of device feature lists. */ struct dfl_fpga_enum_dfl { resource_size_t start; resource_size_t len; struct list_head node; }; struct dfl_fpga_enum_info *dfl_fpga_enum_info_alloc(struct device *dev); int dfl_fpga_enum_info_add_dfl(struct dfl_fpga_enum_info *info, resource_size_t start, resource_size_t len); int dfl_fpga_enum_info_add_irq(struct dfl_fpga_enum_info *info, unsigned int nr_irqs, int *irq_table); void dfl_fpga_enum_info_free(struct dfl_fpga_enum_info *info); /** * struct dfl_fpga_cdev - container device of DFL based FPGA * * @parent: parent device of this container device. * @region: base fpga region. * @fme_dev: FME feature device under this container device. * @lock: mutex lock to protect the port device list. * @port_dev_list: list of all port feature devices under this container device. * @released_port_num: released port number under this container device. */ struct dfl_fpga_cdev { struct device *parent; struct fpga_region *region; struct device *fme_dev; struct mutex lock; struct list_head port_dev_list; int released_port_num; }; struct dfl_fpga_cdev * dfl_fpga_feature_devs_enumerate(struct dfl_fpga_enum_info *info); void dfl_fpga_feature_devs_remove(struct dfl_fpga_cdev *cdev); /* * need to drop the device reference with put_device() after use port platform * device returned by __dfl_fpga_cdev_find_port and dfl_fpga_cdev_find_port * functions. */ struct platform_device * __dfl_fpga_cdev_find_port(struct dfl_fpga_cdev *cdev, void *data, int (*match)(struct platform_device *, void *)); static inline struct platform_device * dfl_fpga_cdev_find_port(struct dfl_fpga_cdev *cdev, void *data, int (*match)(struct platform_device *, void *)) { struct platform_device *pdev; mutex_lock(&cdev->lock); pdev = __dfl_fpga_cdev_find_port(cdev, data, match); mutex_unlock(&cdev->lock); return pdev; } int dfl_fpga_cdev_release_port(struct dfl_fpga_cdev *cdev, int port_id); int dfl_fpga_cdev_assign_port(struct dfl_fpga_cdev *cdev, int port_id); void dfl_fpga_cdev_config_ports_pf(struct dfl_fpga_cdev *cdev); int dfl_fpga_cdev_config_ports_vf(struct dfl_fpga_cdev *cdev, int num_vf); int dfl_fpga_set_irq_triggers(struct dfl_feature *feature, unsigned int start, unsigned int count, int32_t *fds); long dfl_feature_ioctl_get_num_irqs(struct platform_device *pdev, struct dfl_feature *feature, unsigned long arg); long dfl_feature_ioctl_set_irq(struct platform_device *pdev, struct dfl_feature *feature, unsigned long arg); #endif /* __FPGA_DFL_H */
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