--- /dev/null
+/*
+ * This file is separate from sdb.h, because I want that one to remain
+ * unchanged (as far as possible) from the official sdb distribution
+ *
+ * This file and associated functionality are a playground for me to
+ * understand stuff which will later be implemented in more generic places.
+ */
+#include <linux/sdb.h>
+
+/* This is the union of all currently defined types */
+union sdb_record {
+ struct sdb_interconnect ic;
+ struct sdb_device dev;
+ struct sdb_bridge bridge;
+ struct sdb_integration integr;
+ struct sdb_empty empty;
+};
+
+struct fmc_device;
+
+/* Every sdb table is turned into this structure */
+struct sdb_array {
+ int len;
+ int level;
+ unsigned long baseaddr;
+ struct fmc_device *fmc; /* the device that hosts it */
+ struct sdb_array *parent; /* NULL at root */
+ union sdb_record *record; /* copies of the struct */
+ struct sdb_array **subtree; /* only valid for bridge items */
+};
+
+extern int fmc_scan_sdb_tree(struct fmc_device *fmc, unsigned long address);
+extern void fmc_show_sdb_tree(const struct fmc_device *fmc);
+extern signed long fmc_find_sdb_device(struct sdb_array *tree, uint64_t vendor,
+ uint32_t device, unsigned long *sz);
+extern int fmc_free_sdb_tree(struct fmc_device *fmc);
--- /dev/null
+/*
+ * Copyright (C) 2012 CERN (www.cern.ch)
+ * Author: Alessandro Rubini <rubini@gnudd.com>
+ *
+ * Released according to the GNU GPL, version 2 or any later version.
+ *
+ * This work is part of the White Rabbit project, a research effort led
+ * by CERN, the European Institute for Nuclear Research.
+ */
+#ifndef __LINUX_FMC_H__
+#define __LINUX_FMC_H__
+#include <linux/types.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+struct fmc_device;
+struct fmc_driver;
+
+/*
+ * This bus abstraction is developed separately from drivers, so we need
+ * to check the version of the data structures we receive.
+ */
+
+#define FMC_MAJOR 3
+#define FMC_MINOR 0
+#define FMC_VERSION ((FMC_MAJOR << 16) | FMC_MINOR)
+#define __FMC_MAJOR(x) ((x) >> 16)
+#define __FMC_MINOR(x) ((x) & 0xffff)
+
+/*
+ * The device identification, as defined by the IPMI FRU (Field Replaceable
+ * Unit) includes four different strings to describe the device. Here we
+ * only match the "Board Manufacturer" and the "Board Product Name",
+ * ignoring the "Board Serial Number" and "Board Part Number". All 4 are
+ * expected to be strings, so they are treated as zero-terminated C strings.
+ * Unspecified string (NULL) means "any", so if both are unspecified this
+ * is a catch-all driver. So null entries are allowed and we use array
+ * and length. This is unlike pci and usb that use null-terminated arrays
+ */
+struct fmc_fru_id {
+ char *manufacturer;
+ char *product_name;
+};
+
+/*
+ * If the FPGA is already programmed (think Etherbone or the second
+ * SVEC slot), we can match on SDB devices in the memory image. This
+ * match uses an array of devices that must all be present, and the
+ * match is based on vendor and device only. Further checks are expected
+ * to happen in the probe function. Zero means "any" and catch-all is allowed.
+ */
+struct fmc_sdb_one_id {
+ uint64_t vendor;
+ uint32_t device;
+};
+struct fmc_sdb_id {
+ struct fmc_sdb_one_id *cores;
+ int cores_nr;
+};
+
+struct fmc_device_id {
+ struct fmc_fru_id *fru_id;
+ int fru_id_nr;
+ struct fmc_sdb_id *sdb_id;
+ int sdb_id_nr;
+};
+
+/* This sizes the module_param_array used by generic module parameters */
+#define FMC_MAX_CARDS 32
+
+/* The driver is a pretty simple thing */
+struct fmc_driver {
+ unsigned long version;
+ struct device_driver driver;
+ int (*probe)(struct fmc_device *);
+ int (*remove)(struct fmc_device *);
+ const struct fmc_device_id id_table;
+ /* What follows is for generic module parameters */
+ int busid_n;
+ int busid_val[FMC_MAX_CARDS];
+ int gw_n;
+ char *gw_val[FMC_MAX_CARDS];
+};
+#define to_fmc_driver(x) container_of((x), struct fmc_driver, driver)
+
+/* These are the generic parameters, that drivers may instantiate */
+#define FMC_PARAM_BUSID(_d) \
+ module_param_array_named(busid, _d.busid_val, int, &_d.busid_n, 0444)
+#define FMC_PARAM_GATEWARE(_d) \
+ module_param_array_named(gateware, _d.gw_val, charp, &_d.gw_n, 0444)
+
+/*
+ * Drivers may need to configure gpio pins in the carrier. To read input
+ * (a very uncommon operation, and definitely not in the hot paths), just
+ * configure one gpio only and get 0 or 1 as retval of the config method
+ */
+struct fmc_gpio {
+ char *carrier_name; /* name or NULL for virtual pins */
+ int gpio;
+ int _gpio; /* internal use by the carrier */
+ int mode; /* GPIOF_DIR_OUT etc, from <linux/gpio.h> */
+ int irqmode; /* IRQF_TRIGGER_LOW and so on */
+};
+
+/* The numbering of gpio pins allows access to raw pins or virtual roles */
+#define FMC_GPIO_RAW(x) (x) /* 4096 of them */
+#define __FMC_GPIO_IS_RAW(x) ((x) < 0x1000)
+#define FMC_GPIO_IRQ(x) ((x) + 0x1000) /* 256 of them */
+#define FMC_GPIO_LED(x) ((x) + 0x1100) /* 256 of them */
+#define FMC_GPIO_KEY(x) ((x) + 0x1200) /* 256 of them */
+#define FMC_GPIO_TP(x) ((x) + 0x1300) /* 256 of them */
+#define FMC_GPIO_USER(x) ((x) + 0x1400) /* 256 of them */
+/* We may add SCL and SDA, or other roles if the need arises */
+
+/* GPIOF_DIR_IN etc are missing before 3.0. copy from <linux/gpio.h> */
+#ifndef GPIOF_DIR_IN
+# define GPIOF_DIR_OUT (0 << 0)
+# define GPIOF_DIR_IN (1 << 0)
+# define GPIOF_INIT_LOW (0 << 1)
+# define GPIOF_INIT_HIGH (1 << 1)
+#endif
+
+/*
+ * The operations are offered by each carrier and should make driver
+ * design completely independent of the carrier. Named GPIO pins may be
+ * the exception.
+ */
+struct fmc_operations {
+ uint32_t (*readl)(struct fmc_device *fmc, int offset);
+ void (*writel)(struct fmc_device *fmc, uint32_t value, int offset);
+ int (*validate)(struct fmc_device *fmc, struct fmc_driver *drv);
+ int (*reprogram)(struct fmc_device *f, struct fmc_driver *d, char *gw);
+ int (*irq_request)(struct fmc_device *fmc, irq_handler_t h,
+ char *name, int flags);
+ void (*irq_ack)(struct fmc_device *fmc);
+ int (*irq_free)(struct fmc_device *fmc);
+ int (*gpio_config)(struct fmc_device *fmc, struct fmc_gpio *gpio,
+ int ngpio);
+ int (*read_ee)(struct fmc_device *fmc, int pos, void *d, int l);
+ int (*write_ee)(struct fmc_device *fmc, int pos, const void *d, int l);
+};
+
+/* Prefer this helper rather than calling of fmc->reprogram directly */
+extern int fmc_reprogram(struct fmc_device *f, struct fmc_driver *d, char *gw,
+ int sdb_entry);
+
+/*
+ * The device reports all information needed to access hw.
+ *
+ * If we have eeprom_len and not contents, the core reads it.
+ * Then, parsing of identifiers is done by the core which fills fmc_fru_id..
+ * Similarly a device that must be matched based on SDB cores must
+ * fill the entry point and the core will scan the bus (FIXME: sdb match)
+ */
+struct fmc_device {
+ unsigned long version;
+ unsigned long flags;
+ struct module *owner; /* char device must pin it */
+ struct fmc_fru_id id; /* for EEPROM-based match */
+ struct fmc_operations *op; /* carrier-provided */
+ int irq; /* according to host bus. 0 == none */
+ int eeprom_len; /* Usually 8kB, may be less */
+ int eeprom_addr; /* 0x50, 0x52 etc */
+ uint8_t *eeprom; /* Full contents or leading part */
+ char *carrier_name; /* "SPEC" or similar, for special use */
+ void *carrier_data; /* "struct spec *" or equivalent */
+ __iomem void *fpga_base; /* May be NULL (Etherbone) */
+ __iomem void *slot_base; /* Set by the driver */
+ struct fmc_device **devarray; /* Allocated by the bus */
+ int slot_id; /* Index in the slot array */
+ int nr_slots; /* Number of slots in this carrier */
+ unsigned long memlen; /* Used for the char device */
+ struct device dev; /* For Linux use */
+ struct device *hwdev; /* The underlying hardware device */
+ unsigned long sdbfs_entry;
+ struct sdb_array *sdb;
+ uint32_t device_id; /* Filled by the device */
+ char *mezzanine_name; /* Defaults to ``fmc'' */
+ void *mezzanine_data;
+};
+#define to_fmc_device(x) container_of((x), struct fmc_device, dev)
+
+#define FMC_DEVICE_HAS_GOLDEN 1
+#define FMC_DEVICE_HAS_CUSTOM 2
+#define FMC_DEVICE_NO_MEZZANINE 4
+#define FMC_DEVICE_MATCH_SDB 8 /* fmc-core must scan sdb in fpga */
+
+/*
+ * If fpga_base can be used, the carrier offers no readl/writel methods, and
+ * this expands to a single, fast, I/O access.
+ */
+static inline uint32_t fmc_readl(struct fmc_device *fmc, int offset)
+{
+ if (unlikely(fmc->op->readl))
+ return fmc->op->readl(fmc, offset);
+ return readl(fmc->fpga_base + offset);
+}
+static inline void fmc_writel(struct fmc_device *fmc, uint32_t val, int off)
+{
+ if (unlikely(fmc->op->writel))
+ fmc->op->writel(fmc, val, off);
+ else
+ writel(val, fmc->fpga_base + off);
+}
+
+/* pci-like naming */
+static inline void *fmc_get_drvdata(const struct fmc_device *fmc)
+{
+ return dev_get_drvdata(&fmc->dev);
+}
+
+static inline void fmc_set_drvdata(struct fmc_device *fmc, void *data)
+{
+ dev_set_drvdata(&fmc->dev, data);
+}
+
+/* The 4 access points */
+extern int fmc_driver_register(struct fmc_driver *drv);
+extern void fmc_driver_unregister(struct fmc_driver *drv);
+extern int fmc_device_register(struct fmc_device *tdev);
+extern void fmc_device_unregister(struct fmc_device *tdev);
+
+/* Two more for device sets, all driven by the same FPGA */
+extern int fmc_device_register_n(struct fmc_device **devs, int n);
+extern void fmc_device_unregister_n(struct fmc_device **devs, int n);
+
+/* Internal cross-calls between files; not exported to other modules */
+extern int fmc_match(struct device *dev, struct device_driver *drv);
+extern int fmc_fill_id_info(struct fmc_device *fmc);
+extern void fmc_free_id_info(struct fmc_device *fmc);
+extern void fmc_dump_eeprom(const struct fmc_device *fmc);
+extern void fmc_dump_sdb(const struct fmc_device *fmc);
+
+#endif /* __LINUX_FMC_H__ */
--- /dev/null
+/*
+ * Copyright (C) 2012 CERN (www.cern.ch)
+ * Author: Alessandro Rubini <rubini@gnudd.com>
+ *
+ * Released according to the GNU GPL, version 2 or any later version.
+ *
+ * This work is part of the White Rabbit project, a research effort led
+ * by CERN, the European Institute for Nuclear Research.
+ */
+#ifndef __LINUX_IPMI_FRU_H__
+#define __LINUX_IPMI_FRU_H__
+#ifdef __KERNEL__
+# include <linux/types.h>
+# include <linux/string.h>
+#else
+# include <stdint.h>
+# include <string.h>
+#endif
+
+/*
+ * These structures match the unaligned crap we have in FRU1011.pdf
+ * (http://download.intel.com/design/servers/ipmi/FRU1011.pdf)
+ */
+
+/* chapter 8, page 5 */
+struct fru_common_header {
+ uint8_t format; /* 0x01 */
+ uint8_t internal_use_off; /* multiple of 8 bytes */
+ uint8_t chassis_info_off; /* multiple of 8 bytes */
+ uint8_t board_area_off; /* multiple of 8 bytes */
+ uint8_t product_area_off; /* multiple of 8 bytes */
+ uint8_t multirecord_off; /* multiple of 8 bytes */
+ uint8_t pad; /* must be 0 */
+ uint8_t checksum; /* sum modulo 256 must be 0 */
+};
+
+/* chapter 9, page 5 -- internal_use: not used by us */
+
+/* chapter 10, page 6 -- chassis info: not used by us */
+
+/* chapter 13, page 9 -- used by board_info_area below */
+struct fru_type_length {
+ uint8_t type_length;
+ uint8_t data[0];
+};
+
+/* chapter 11, page 7 */
+struct fru_board_info_area {
+ uint8_t format; /* 0x01 */
+ uint8_t area_len; /* multiple of 8 bytes */
+ uint8_t language; /* I hope it's 0 */
+ uint8_t mfg_date[3]; /* LSB, minutes since 1996-01-01 */
+ struct fru_type_length tl[0]; /* type-length stuff follows */
+
+ /*
+ * the TL there are in order:
+ * Board Manufacturer
+ * Board Product Name
+ * Board Serial Number
+ * Board Part Number
+ * FRU File ID (may be null)
+ * more manufacturer-specific stuff
+ * 0xc1 as a terminator
+ * 0x00 pad to a multiple of 8 bytes - 1
+ * checksum (sum of all stuff module 256 must be zero)
+ */
+};
+
+enum fru_type {
+ FRU_TYPE_BINARY = 0x00,
+ FRU_TYPE_BCDPLUS = 0x40,
+ FRU_TYPE_ASCII6 = 0x80,
+ FRU_TYPE_ASCII = 0xc0, /* not ascii: depends on language */
+};
+
+/*
+ * some helpers
+ */
+static inline struct fru_board_info_area *fru_get_board_area(
+ const struct fru_common_header *header)
+{
+ /* we know for sure that the header is 8 bytes in size */
+ return (struct fru_board_info_area *)(header + header->board_area_off);
+}
+
+static inline int fru_type(struct fru_type_length *tl)
+{
+ return tl->type_length & 0xc0;
+}
+
+static inline int fru_length(struct fru_type_length *tl)
+{
+ return (tl->type_length & 0x3f) + 1; /* len of whole record */
+}
+
+/* assume ascii-latin1 encoding */
+static inline int fru_strlen(struct fru_type_length *tl)
+{
+ return fru_length(tl) - 1;
+}
+
+static inline char *fru_strcpy(char *dest, struct fru_type_length *tl)
+{
+ int len = fru_strlen(tl);
+ memcpy(dest, tl->data, len);
+ dest[len] = '\0';
+ return dest;
+}
+
+static inline struct fru_type_length *fru_next_tl(struct fru_type_length *tl)
+{
+ return tl + fru_length(tl);
+}
+
+static inline int fru_is_eof(struct fru_type_length *tl)
+{
+ return tl->type_length == 0xc1;
+}
+
+/*
+ * External functions defined in fru-parse.c.
+ */
+extern int fru_header_cksum_ok(struct fru_common_header *header);
+extern int fru_bia_cksum_ok(struct fru_board_info_area *bia);
+
+/* All these 4 return allocated strings by calling fru_alloc() */
+extern char *fru_get_board_manufacturer(struct fru_common_header *header);
+extern char *fru_get_product_name(struct fru_common_header *header);
+extern char *fru_get_serial_number(struct fru_common_header *header);
+extern char *fru_get_part_number(struct fru_common_header *header);
+
+/* This must be defined by the caller of the above functions */
+extern void *fru_alloc(size_t size);
+
+#endif /* __LINUX_IMPI_FRU_H__ */
--- /dev/null
+/*
+ * This is the official version 1.1 of sdb.h
+ */
+#ifndef __SDB_H__
+#define __SDB_H__
+#ifdef __KERNEL__
+#include <linux/types.h>
+#else
+#include <stdint.h>
+#endif
+
+/*
+ * All structures are 64 bytes long and are expected
+ * to live in an array, one for each interconnect.
+ * Most fields of the structures are shared among the
+ * various types, and most-specific fields are at the
+ * beginning (for alignment reasons, and to keep the
+ * magic number at the head of the interconnect record
+ */
+
+/* Product, 40 bytes at offset 24, 8-byte aligned
+ *
+ * device_id is vendor-assigned; version is device-specific,
+ * date is hex (e.g 0x20120501), name is UTF-8, blank-filled
+ * and not terminated with a 0 byte.
+ */
+struct sdb_product {
+ uint64_t vendor_id; /* 0x18..0x1f */
+ uint32_t device_id; /* 0x20..0x23 */
+ uint32_t version; /* 0x24..0x27 */
+ uint32_t date; /* 0x28..0x2b */
+ uint8_t name[19]; /* 0x2c..0x3e */
+ uint8_t record_type; /* 0x3f */
+};
+
+/*
+ * Component, 56 bytes at offset 8, 8-byte aligned
+ *
+ * The address range is first to last, inclusive
+ * (for example 0x100000 - 0x10ffff)
+ */
+struct sdb_component {
+ uint64_t addr_first; /* 0x08..0x0f */
+ uint64_t addr_last; /* 0x10..0x17 */
+ struct sdb_product product; /* 0x18..0x3f */
+};
+
+/* Type of the SDB record */
+enum sdb_record_type {
+ sdb_type_interconnect = 0x00,
+ sdb_type_device = 0x01,
+ sdb_type_bridge = 0x02,
+ sdb_type_integration = 0x80,
+ sdb_type_repo_url = 0x81,
+ sdb_type_synthesis = 0x82,
+ sdb_type_empty = 0xFF,
+};
+
+/* Type 0: interconnect (first of the array)
+ *
+ * sdb_records is the length of the table including this first
+ * record, version is 1. The bus type is enumerated later.
+ */
+#define SDB_MAGIC 0x5344422d /* "SDB-" */
+struct sdb_interconnect {
+ uint32_t sdb_magic; /* 0x00-0x03 */
+ uint16_t sdb_records; /* 0x04-0x05 */
+ uint8_t sdb_version; /* 0x06 */
+ uint8_t sdb_bus_type; /* 0x07 */
+ struct sdb_component sdb_component; /* 0x08-0x3f */
+};
+
+/* Type 1: device
+ *
+ * class is 0 for "custom device", other values are
+ * to be standardized; ABI version is for the driver,
+ * bus-specific bits are defined by each bus (see below)
+ */
+struct sdb_device {
+ uint16_t abi_class; /* 0x00-0x01 */
+ uint8_t abi_ver_major; /* 0x02 */
+ uint8_t abi_ver_minor; /* 0x03 */
+ uint32_t bus_specific; /* 0x04-0x07 */
+ struct sdb_component sdb_component; /* 0x08-0x3f */
+};
+
+/* Type 2: bridge
+ *
+ * child is the address of the nested SDB table
+ */
+struct sdb_bridge {
+ uint64_t sdb_child; /* 0x00-0x07 */
+ struct sdb_component sdb_component; /* 0x08-0x3f */
+};
+
+/* Type 0x80: integration
+ *
+ * all types with bit 7 set are meta-information, so
+ * software can ignore the types it doesn't know. Here we
+ * just provide product information for an aggregate device
+ */
+struct sdb_integration {
+ uint8_t reserved[24]; /* 0x00-0x17 */
+ struct sdb_product product; /* 0x08-0x3f */
+};
+
+/* Type 0x81: Top module repository url
+ *
+ * again, an informative field that software can ignore
+ */
+struct sdb_repo_url {
+ uint8_t repo_url[63]; /* 0x00-0x3e */
+ uint8_t record_type; /* 0x3f */
+};
+
+/* Type 0x82: Synthesis tool information
+ *
+ * this informative record
+ */
+struct sdb_synthesis {
+ uint8_t syn_name[16]; /* 0x00-0x0f */
+ uint8_t commit_id[16]; /* 0x10-0x1f */
+ uint8_t tool_name[8]; /* 0x20-0x27 */
+ uint32_t tool_version; /* 0x28-0x2b */
+ uint32_t date; /* 0x2c-0x2f */
+ uint8_t user_name[15]; /* 0x30-0x3e */
+ uint8_t record_type; /* 0x3f */
+};
+
+/* Type 0xff: empty
+ *
+ * this allows keeping empty slots during development,
+ * so they can be filled later with minimal efforts and
+ * no misleading description is ever shipped -- hopefully.
+ * It can also be used to pad a table to a desired length.
+ */
+struct sdb_empty {
+ uint8_t reserved[63]; /* 0x00-0x3e */
+ uint8_t record_type; /* 0x3f */
+};
+
+/* The type of bus, for bus-specific flags */
+enum sdb_bus_type {
+ sdb_wishbone = 0x00,
+ sdb_data = 0x01,
+};
+
+#define SDB_WB_WIDTH_MASK 0x0f
+#define SDB_WB_ACCESS8 0x01
+#define SDB_WB_ACCESS16 0x02
+#define SDB_WB_ACCESS32 0x04
+#define SDB_WB_ACCESS64 0x08
+#define SDB_WB_LITTLE_ENDIAN 0x80
+
+#define SDB_DATA_READ 0x04
+#define SDB_DATA_WRITE 0x02
+#define SDB_DATA_EXEC 0x01
+
+#endif /* __SDB_H__ */
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