From 5a1c269f15dc9f964f829d864ae8abebcaa3d3be Mon Sep 17 00:00:00 2001 From: Logan Gunthorpe Date: Thu, 3 Aug 2017 12:19:40 -0600 Subject: NTB: switchtec: Move structure definitions into a common header Create the switchtec.h header in include/linux with hardware defines and the switchtec_dev structure. Both moved directly from switchtec.c. This is a prep patch for creating an NTB driver for Switchtec. Signed-off-by: Logan Gunthorpe Reviewed-by: Stephen Bates Reviewed-by: Kurt Schwemmer Acked-by: Greg Kroah-Hartman Acked-by: Bjorn Helgaas Signed-off-by: Jon Mason --- include/linux/switchtec.h | 279 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 279 insertions(+) create mode 100644 include/linux/switchtec.h (limited to 'include') diff --git a/include/linux/switchtec.h b/include/linux/switchtec.h new file mode 100644 index 000000000000..1cbd0e63b0ab --- /dev/null +++ b/include/linux/switchtec.h @@ -0,0 +1,279 @@ +/* + * Microsemi Switchtec PCIe Driver + * Copyright (c) 2017, Microsemi Corporation + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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 _SWITCHTEC_H +#define _SWITCHTEC_H + +#include +#include + +#define MICROSEMI_VENDOR_ID 0x11f8 +#define MICROSEMI_NTB_CLASSCODE 0x068000 +#define MICROSEMI_MGMT_CLASSCODE 0x058000 + +#define SWITCHTEC_MRPC_PAYLOAD_SIZE 1024 +#define SWITCHTEC_MAX_PFF_CSR 48 + +#define SWITCHTEC_EVENT_OCCURRED BIT(0) +#define SWITCHTEC_EVENT_CLEAR BIT(0) +#define SWITCHTEC_EVENT_EN_LOG BIT(1) +#define SWITCHTEC_EVENT_EN_CLI BIT(2) +#define SWITCHTEC_EVENT_EN_IRQ BIT(3) +#define SWITCHTEC_EVENT_FATAL BIT(4) + +enum { + SWITCHTEC_GAS_MRPC_OFFSET = 0x0000, + SWITCHTEC_GAS_TOP_CFG_OFFSET = 0x1000, + SWITCHTEC_GAS_SW_EVENT_OFFSET = 0x1800, + SWITCHTEC_GAS_SYS_INFO_OFFSET = 0x2000, + SWITCHTEC_GAS_FLASH_INFO_OFFSET = 0x2200, + SWITCHTEC_GAS_PART_CFG_OFFSET = 0x4000, + SWITCHTEC_GAS_NTB_OFFSET = 0x10000, + SWITCHTEC_GAS_PFF_CSR_OFFSET = 0x134000, +}; + +struct mrpc_regs { + u8 input_data[SWITCHTEC_MRPC_PAYLOAD_SIZE]; + u8 output_data[SWITCHTEC_MRPC_PAYLOAD_SIZE]; + u32 cmd; + u32 status; + u32 ret_value; +} __packed; + +enum mrpc_status { + SWITCHTEC_MRPC_STATUS_INPROGRESS = 1, + SWITCHTEC_MRPC_STATUS_DONE = 2, + SWITCHTEC_MRPC_STATUS_ERROR = 0xFF, + SWITCHTEC_MRPC_STATUS_INTERRUPTED = 0x100, +}; + +struct sw_event_regs { + u64 event_report_ctrl; + u64 reserved1; + u64 part_event_bitmap; + u64 reserved2; + u32 global_summary; + u32 reserved3[3]; + u32 stack_error_event_hdr; + u32 stack_error_event_data; + u32 reserved4[4]; + u32 ppu_error_event_hdr; + u32 ppu_error_event_data; + u32 reserved5[4]; + u32 isp_error_event_hdr; + u32 isp_error_event_data; + u32 reserved6[4]; + u32 sys_reset_event_hdr; + u32 reserved7[5]; + u32 fw_exception_hdr; + u32 reserved8[5]; + u32 fw_nmi_hdr; + u32 reserved9[5]; + u32 fw_non_fatal_hdr; + u32 reserved10[5]; + u32 fw_fatal_hdr; + u32 reserved11[5]; + u32 twi_mrpc_comp_hdr; + u32 twi_mrpc_comp_data; + u32 reserved12[4]; + u32 twi_mrpc_comp_async_hdr; + u32 twi_mrpc_comp_async_data; + u32 reserved13[4]; + u32 cli_mrpc_comp_hdr; + u32 cli_mrpc_comp_data; + u32 reserved14[4]; + u32 cli_mrpc_comp_async_hdr; + u32 cli_mrpc_comp_async_data; + u32 reserved15[4]; + u32 gpio_interrupt_hdr; + u32 gpio_interrupt_data; + u32 reserved16[4]; +} __packed; + +enum { + SWITCHTEC_CFG0_RUNNING = 0x04, + SWITCHTEC_CFG1_RUNNING = 0x05, + SWITCHTEC_IMG0_RUNNING = 0x03, + SWITCHTEC_IMG1_RUNNING = 0x07, +}; + +struct sys_info_regs { + u32 device_id; + u32 device_version; + u32 firmware_version; + u32 reserved1; + u32 vendor_table_revision; + u32 table_format_version; + u32 partition_id; + u32 cfg_file_fmt_version; + u16 cfg_running; + u16 img_running; + u32 reserved2[57]; + char vendor_id[8]; + char product_id[16]; + char product_revision[4]; + char component_vendor[8]; + u16 component_id; + u8 component_revision; +} __packed; + +struct flash_info_regs { + u32 flash_part_map_upd_idx; + + struct active_partition_info { + u32 address; + u32 build_version; + u32 build_string; + } active_img; + + struct active_partition_info active_cfg; + struct active_partition_info inactive_img; + struct active_partition_info inactive_cfg; + + u32 flash_length; + + struct partition_info { + u32 address; + u32 length; + } cfg0; + + struct partition_info cfg1; + struct partition_info img0; + struct partition_info img1; + struct partition_info nvlog; + struct partition_info vendor[8]; +}; + +struct ntb_info_regs { + u8 partition_count; + u8 partition_id; + u16 reserved1; + u64 ep_map; + u16 requester_id; +} __packed; + +struct part_cfg_regs { + u32 status; + u32 state; + u32 port_cnt; + u32 usp_port_mode; + u32 usp_pff_inst_id; + u32 vep_pff_inst_id; + u32 dsp_pff_inst_id[47]; + u32 reserved1[11]; + u16 vep_vector_number; + u16 usp_vector_number; + u32 port_event_bitmap; + u32 reserved2[3]; + u32 part_event_summary; + u32 reserved3[3]; + u32 part_reset_hdr; + u32 part_reset_data[5]; + u32 mrpc_comp_hdr; + u32 mrpc_comp_data[5]; + u32 mrpc_comp_async_hdr; + u32 mrpc_comp_async_data[5]; + u32 dyn_binding_hdr; + u32 dyn_binding_data[5]; + u32 reserved4[159]; +} __packed; + +enum { + SWITCHTEC_PART_CFG_EVENT_RESET = 1 << 0, + SWITCHTEC_PART_CFG_EVENT_MRPC_CMP = 1 << 1, + SWITCHTEC_PART_CFG_EVENT_MRPC_ASYNC_CMP = 1 << 2, + SWITCHTEC_PART_CFG_EVENT_DYN_PART_CMP = 1 << 3, +}; + +struct pff_csr_regs { + u16 vendor_id; + u16 device_id; + u32 pci_cfg_header[15]; + u32 pci_cap_region[48]; + u32 pcie_cap_region[448]; + u32 indirect_gas_window[128]; + u32 indirect_gas_window_off; + u32 reserved[127]; + u32 pff_event_summary; + u32 reserved2[3]; + u32 aer_in_p2p_hdr; + u32 aer_in_p2p_data[5]; + u32 aer_in_vep_hdr; + u32 aer_in_vep_data[5]; + u32 dpc_hdr; + u32 dpc_data[5]; + u32 cts_hdr; + u32 cts_data[5]; + u32 reserved3[6]; + u32 hotplug_hdr; + u32 hotplug_data[5]; + u32 ier_hdr; + u32 ier_data[5]; + u32 threshold_hdr; + u32 threshold_data[5]; + u32 power_mgmt_hdr; + u32 power_mgmt_data[5]; + u32 tlp_throttling_hdr; + u32 tlp_throttling_data[5]; + u32 force_speed_hdr; + u32 force_speed_data[5]; + u32 credit_timeout_hdr; + u32 credit_timeout_data[5]; + u32 link_state_hdr; + u32 link_state_data[5]; + u32 reserved4[174]; +} __packed; + +struct switchtec_dev { + struct pci_dev *pdev; + struct device dev; + struct cdev cdev; + + int partition; + int partition_count; + int pff_csr_count; + char pff_local[SWITCHTEC_MAX_PFF_CSR]; + + void __iomem *mmio; + struct mrpc_regs __iomem *mmio_mrpc; + struct sw_event_regs __iomem *mmio_sw_event; + struct sys_info_regs __iomem *mmio_sys_info; + struct flash_info_regs __iomem *mmio_flash_info; + struct ntb_info_regs __iomem *mmio_ntb; + struct part_cfg_regs __iomem *mmio_part_cfg; + struct part_cfg_regs __iomem *mmio_part_cfg_all; + struct pff_csr_regs __iomem *mmio_pff_csr; + + /* + * The mrpc mutex must be held when accessing the other + * mrpc_ fields, alive flag and stuser->state field + */ + struct mutex mrpc_mutex; + struct list_head mrpc_queue; + int mrpc_busy; + struct work_struct mrpc_work; + struct delayed_work mrpc_timeout; + bool alive; + + wait_queue_head_t event_wq; + atomic_t event_cnt; +}; + +static inline struct switchtec_dev *to_stdev(struct device *dev) +{ + return container_of(dev, struct switchtec_dev, dev); +} + +#endif -- cgit From 302e994d3af7e4be8d0f789aa66422166ccd89c2 Mon Sep 17 00:00:00 2001 From: Logan Gunthorpe Date: Thu, 3 Aug 2017 12:19:41 -0600 Subject: NTB: switchtec: Export class symbol for use in upper layer driver We export the class pointer symbol and add an extern define in the Switchtec header file. Signed-off-by: Logan Gunthorpe Reviewed-by: Stephen Bates Reviewed-by: Kurt Schwemmer Acked-by: Bjorn Helgaas Signed-off-by: Jon Mason --- include/linux/switchtec.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/linux/switchtec.h b/include/linux/switchtec.h index 1cbd0e63b0ab..18e388101855 100644 --- a/include/linux/switchtec.h +++ b/include/linux/switchtec.h @@ -276,4 +276,6 @@ static inline struct switchtec_dev *to_stdev(struct device *dev) return container_of(dev, struct switchtec_dev, dev); } +extern struct class *switchtec_class; + #endif -- cgit From c082b04c9d40f69dacd93a151db114299f5de6eb Mon Sep 17 00:00:00 2001 From: Logan Gunthorpe Date: Thu, 3 Aug 2017 12:19:42 -0600 Subject: NTB: switchtec: Add NTB hardware register definitions There are two additional regions: ctrl and dbmsg. The first is for generic NTB control and memory windows. The second is for doorbells and message registers. This patch also adds a number of related constants for using these registers. Signed-off-by: Logan Gunthorpe Reviewed-by: Stephen Bates Reviewed-by: Kurt Schwemmer Signed-off-by: Jon Mason --- include/linux/switchtec.h | 84 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) (limited to 'include') diff --git a/include/linux/switchtec.h b/include/linux/switchtec.h index 18e388101855..9c2be7631257 100644 --- a/include/linux/switchtec.h +++ b/include/linux/switchtec.h @@ -156,6 +156,12 @@ struct flash_info_regs { struct partition_info vendor[8]; }; +enum { + SWITCHTEC_NTB_REG_INFO_OFFSET = 0x0000, + SWITCHTEC_NTB_REG_CTRL_OFFSET = 0x4000, + SWITCHTEC_NTB_REG_DBMSG_OFFSET = 0x64000, +}; + struct ntb_info_regs { u8 partition_count; u8 partition_id; @@ -190,6 +196,84 @@ struct part_cfg_regs { u32 reserved4[159]; } __packed; +enum { + NTB_CTRL_PART_OP_LOCK = 0x1, + NTB_CTRL_PART_OP_CFG = 0x2, + NTB_CTRL_PART_OP_RESET = 0x3, + + NTB_CTRL_PART_STATUS_NORMAL = 0x1, + NTB_CTRL_PART_STATUS_LOCKED = 0x2, + NTB_CTRL_PART_STATUS_LOCKING = 0x3, + NTB_CTRL_PART_STATUS_CONFIGURING = 0x4, + NTB_CTRL_PART_STATUS_RESETTING = 0x5, + + NTB_CTRL_BAR_VALID = 1 << 0, + NTB_CTRL_BAR_DIR_WIN_EN = 1 << 4, + NTB_CTRL_BAR_LUT_WIN_EN = 1 << 5, + + NTB_CTRL_REQ_ID_EN = 1 << 0, + + NTB_CTRL_LUT_EN = 1 << 0, + + NTB_PART_CTRL_ID_PROT_DIS = 1 << 0, +}; + +struct ntb_ctrl_regs { + u32 partition_status; + u32 partition_op; + u32 partition_ctrl; + u32 bar_setup; + u32 bar_error; + u16 lut_table_entries; + u16 lut_table_offset; + u32 lut_error; + u16 req_id_table_size; + u16 req_id_table_offset; + u32 req_id_error; + u32 reserved1[7]; + struct { + u32 ctl; + u32 win_size; + u64 xlate_addr; + } bar_entry[6]; + u32 reserved2[216]; + u32 req_id_table[256]; + u32 reserved3[512]; + u64 lut_entry[512]; +} __packed; + +#define NTB_DBMSG_IMSG_STATUS BIT_ULL(32) +#define NTB_DBMSG_IMSG_MASK BIT_ULL(40) + +struct ntb_dbmsg_regs { + u32 reserved1[1024]; + u64 odb; + u64 odb_mask; + u64 idb; + u64 idb_mask; + u8 idb_vec_map[64]; + u32 msg_map; + u32 reserved2; + struct { + u32 msg; + u32 status; + } omsg[4]; + + struct { + u32 msg; + u8 status; + u8 mask; + u8 src; + u8 reserved; + } imsg[4]; + + u8 reserved3[3928]; + u8 msix_table[1024]; + u8 reserved4[3072]; + u8 pba[24]; + u8 reserved5[4072]; +} __packed; + enum { SWITCHTEC_PART_CFG_EVENT_RESET = 1 << 0, SWITCHTEC_PART_CFG_EVENT_MRPC_CMP = 1 << 1, -- cgit From 48c302dc8f3acc1b0ef56a28569bc6a35b9b0e60 Mon Sep 17 00:00:00 2001 From: Logan Gunthorpe Date: Thu, 3 Aug 2017 12:19:43 -0600 Subject: NTB: switchtec: Add link event notifier callback In order for the Switchtec NTB code to handle link change events we create a notifier callback in the switchtec code which gets called whenever an appropriate event interrupt occurs. In order to preserve userspace's ability to follow these events, we compare the event count with a stored copy from last time we checked. Signed-off-by: Logan Gunthorpe Reviewed-by: Stephen Bates Reviewed-by: Kurt Schwemmer Acked-by: Bjorn Helgaas Signed-off-by: Jon Mason --- include/linux/switchtec.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include') diff --git a/include/linux/switchtec.h b/include/linux/switchtec.h index 9c2be7631257..d8159944f013 100644 --- a/include/linux/switchtec.h +++ b/include/linux/switchtec.h @@ -353,6 +353,10 @@ struct switchtec_dev { wait_queue_head_t event_wq; atomic_t event_cnt; + + struct work_struct link_event_work; + void (*link_notifier)(struct switchtec_dev *stdev); + u8 link_event_count[SWITCHTEC_MAX_PFF_CSR]; }; static inline struct switchtec_dev *to_stdev(struct device *dev) -- cgit From fa5ab66e36de56f7e40dad57780d53e059dced86 Mon Sep 17 00:00:00 2001 From: Logan Gunthorpe Date: Thu, 3 Aug 2017 12:19:45 -0600 Subject: NTB: Add check and comment for link up to mw_count() and mw_get_align() Adds a comment and a check to ntb_mw_get_align() so that it always fails if the function is called before the link is up. Also adds a comment to ntb_mw_count() to note that it may return 0 if it is called before the link is up. This is to prevent accidental mis-use in clients that are testing on hardware that this doesn't matter for. Signed-off-by: Logan Gunthorpe Acked-by: Allen Hubbe Signed-off-by: Jon Mason --- include/linux/ntb.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/linux/ntb.h b/include/linux/ntb.h index 609e232c00da..47f2966cfd7f 100644 --- a/include/linux/ntb.h +++ b/include/linux/ntb.h @@ -730,7 +730,8 @@ static inline int ntb_link_disable(struct ntb_dev *ntb) * Hardware and topology may support a different number of memory windows. * Moreover different peer devices can support different number of memory * windows. Simply speaking this method returns the number of possible inbound - * memory windows to share with specified peer device. + * memory windows to share with specified peer device. Note: this may return + * zero if the link is not up yet. * * Return: the number of memory windows. */ @@ -751,7 +752,7 @@ static inline int ntb_mw_count(struct ntb_dev *ntb, int pidx) * Get the alignments of an inbound memory window with specified index. * NULL may be given for any output parameter if the value is not needed. * The alignment and size parameters may be used for allocation of proper - * shared memory. + * shared memory. Note: this must only be called when the link is up. * * Return: Zero on success, otherwise a negative error number. */ @@ -760,6 +761,9 @@ static inline int ntb_mw_get_align(struct ntb_dev *ntb, int pidx, int widx, resource_size_t *size_align, resource_size_t *size_max) { + if (!(ntb_link_is_up(ntb, NULL, NULL) & (1 << pidx))) + return -ENOTCONN; + return ntb->ops->mw_get_align(ntb, pidx, widx, addr_align, size_align, size_max); } -- cgit From 33dea5aae0320345af26ae9aba0894a930e0d4ec Mon Sep 17 00:00:00 2001 From: Logan Gunthorpe Date: Thu, 3 Aug 2017 12:19:46 -0600 Subject: NTB: switchtec_ntb: Introduce initial NTB driver Seeing the Switchtec NTB hardware shares the same endpoint as the management endpoint we utilize the class_interface API to register an NTB driver for every Switchtec device in the system that has the NTB class code. Signed-off-by: Logan Gunthorpe Reviewed-by: Stephen Bates Reviewed-by: Kurt Schwemmer Acked-by: Allen Hubbe Acked-by: Bjorn Helgaas Signed-off-by: Jon Mason --- include/linux/switchtec.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include') diff --git a/include/linux/switchtec.h b/include/linux/switchtec.h index d8159944f013..09d73d0d1aa8 100644 --- a/include/linux/switchtec.h +++ b/include/linux/switchtec.h @@ -320,6 +320,8 @@ struct pff_csr_regs { u32 reserved4[174]; } __packed; +struct switchtec_ntb; + struct switchtec_dev { struct pci_dev *pdev; struct device dev; @@ -357,6 +359,8 @@ struct switchtec_dev { struct work_struct link_event_work; void (*link_notifier)(struct switchtec_dev *stdev); u8 link_event_count[SWITCHTEC_MAX_PFF_CSR]; + + struct switchtec_ntb *sndev; }; static inline struct switchtec_dev *to_stdev(struct device *dev) -- cgit From e099b45b7c27b4fc6510918ea8c7d18980787283 Mon Sep 17 00:00:00 2001 From: Logan Gunthorpe Date: Thu, 3 Aug 2017 12:19:49 -0600 Subject: NTB: switchtec_ntb: Add skeleton NTB driver Add a skeleton NTB driver which will be filled out in subsequent patches. Signed-off-by: Logan Gunthorpe Reviewed-by: Stephen Bates Reviewed-by: Kurt Schwemmer Acked-by: Allen Hubbe Signed-off-by: Jon Mason --- include/linux/ntb.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include') diff --git a/include/linux/ntb.h b/include/linux/ntb.h index 47f2966cfd7f..c308964777eb 100644 --- a/include/linux/ntb.h +++ b/include/linux/ntb.h @@ -70,6 +70,7 @@ struct pci_dev; * @NTB_TOPO_SEC: On secondary side of remote ntb. * @NTB_TOPO_B2B_USD: On primary side of local ntb upstream of remote ntb. * @NTB_TOPO_B2B_DSD: On primary side of local ntb downstream of remote ntb. + * @NTB_TOPO_SWITCH: Connected via a switch which supports ntb. */ enum ntb_topo { NTB_TOPO_NONE = -1, @@ -77,6 +78,7 @@ enum ntb_topo { NTB_TOPO_SEC, NTB_TOPO_B2B_USD, NTB_TOPO_B2B_DSD, + NTB_TOPO_SWITCH, }; static inline int ntb_topo_is_b2b(enum ntb_topo topo) @@ -97,6 +99,7 @@ static inline char *ntb_topo_string(enum ntb_topo topo) case NTB_TOPO_SEC: return "NTB_TOPO_SEC"; case NTB_TOPO_B2B_USD: return "NTB_TOPO_B2B_USD"; case NTB_TOPO_B2B_DSD: return "NTB_TOPO_B2B_DSD"; + case NTB_TOPO_SWITCH: return "NTB_TOPO_SWITCH"; } return "NTB_TOPO_INVALID"; } -- cgit