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Simple VME FMC Carrier SVEC
Commit d1acc791 authored by Federico Vaga's avatar Federico Vaga
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*.o
*.ko
*.mod.c
.*.o.cmd
.*.ko.cmd
*.mod.d
*.o.d
*.tmp
.tmp_versions
modules.order
Module.symvers
\#*
*~
CHANGELOG 0 → 100644
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# Change Log
## [0.9.0] - 2017-10-13
### Added
- unittest
### Fixes
- add missing header in the repository
- add delay in the unlocking sequence
## [0.8.0] - 2017-10-12
### Added
- char device to program the Application FPGA
- sysfs attribute to unlock programming
- documentation!
## [0.0.0] - 2017-09-28
### Added
- basic Linux device driver
\ No newline at end of file
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svec
Copyright (C) 2017 cohtdrivers
This program is free software; you can redistribute it and/or modify
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Makefile 0 → 100644
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-include Makefile.specific
# include parent_common.mk for buildsystem's defines
#use absolute path for REPO_PARENT
REPO_PARENT ?= $(shell /bin/pwd)/..
-include $(REPO_PARENT)/parent_common.mk
DIRS = kernel doc
.PHONY: all clean modules install modules_install $(DIRS)
all clean modules install modules_install: $(DIRS)
clean: TARGET = clean
modules: TARGET = modules
install: TARGET = install
modules_install: TARGET = modules_install
$(DIRS):
$(MAKE) -C $@ $(TARGET)
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.. image:: ./doc/svec-logo.png
SVEC Driver
===========
This is the simplified version of the SVEC driver which only purpose is
to export an interface to enable the users to program their bitstream on
the SVEC FPGA.
Build Sources
=============
In order to be able to build this SVEC driver you need the VMEBUS sources
at hand, otherwise you cannot compile the kernel sources.
The documentation is written in reStructuredText and it generates HTML files
and man pages. For this you need the python docutils package installed
If the requirements are satified you can run the following commant in
the project root directory:
.. code::
make VMEBUS=/path/to/vmebus/
Futuristic Vision
=================
Actually this is not a driver for the SVEC card but for that little gateware
core in the SVEC bootloader FPGA. In the future we can think about standardize
other designs around this concept. Then this driver will become the FPGA
programmer driver for a set of devices.
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*.man
*.html
*.pdf
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MANUAL=svec-device
all: img doc
doc: html man
html:
rst2html $(MANUAL).rst > $(MANUAL).html
man:
rst2man --syntax-highlight=none $(MANUAL).rst > $(MANUAL).man
img: svec-logo.png
svec-logo.png: svec-logo.svg
inkscape -f $< -e $@
clean:
rm -f *.html *.man *.png
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====
SVEC
====
---------------------------------------------
programming application FPGA
---------------------------------------------
:Author: Federico Vaga <federico.vaga@cern.ch>
:organization: CERN
:Date: 2017-10-12
:Copyright: GNU GPL, version 2 or any later version
:Version: 0.9.0
:Manual section: 4
:Manual group: CERN BECOHT Toolkit
Description
===========
The file ``/dev/svec.[0-N]`` is a character device, usually of mode 0440
and owner root:root. The number ``[0-N]`` represents a *SVEC Module* instance.
It is used to program the *Application FPGA* of a `SVEC module`_ on the VME bus.
The programming procedure consists in taking an FPGA bit-stream from the user
and writing it in the Application FPGA on the SVEC Module.
Once the device has been closed the Application FPGA become active and,
if valid, it will run the FPGA bit-stream provided by the user.
In order to prevent accidental programming, the Application FPGA programming
procedure is protected by the sysfs attribute ``AFPGA/lock``, usually of mode
0644 and owner root:root. On read it returns a string representing the current
locking status. On write it accepts only the strings:
- "unlock" to unlock the programming procedure.
- "lock" to lock the programming procedure
Once the programming procedure has been completed, the device go back to the
locking status.
The complete programming procedure is:
#. unlock the programming procedure by writing "unlock" in ``AFPGA/lock``
#. write the FPGA bit-stream in the character device ``/dev/svec.<N>``
Files
=====
/dev/svec.[0-N]
/sys/bus/vme/device/vme.[0-N]/svec/svec.[0-N]/AFPGA/lock
.. _`SVEC module`: https://www.ohwr.org/projects/svec/
Examples
========
.. code:: sh
echo "unlock" > /sys/bus/vme/devices/vme.8/svec/svec.8/AFPGA/lock
dd if=/path/to/bitstream.bin of=/dev/svec.8
.. code:: sh
echo "unlock" > /sys/bus/vme/devices/vme.8/svec/svec.8/AFPGA/lock
cat /path/to/bitstream.bin > /dev/svec.8
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kernel/Kbuild 0 → 100644
View file @ d1acc791
# add versions of supermodule. It is useful when svec-sw is included as sub-module
# of a bigger project that we want to track
ifdef CONFIG_SUPER_REPO
ifdef CONFIG_SUPER_REPO_VERSION
SUBMODULE_VERSIONS += MODULE_INFO(version_$(CONFIG_SUPER_REPO),\"$(CONFIG_SUPER_REPO_VERSION)\");
endif
endif
# add versions of used submodules
ccflags-y += -DADDITIONAL_VERSIONS="$(SUBMODULE_VERSIONS)"
ccflags-y += -DGIT_VERSION=\"$(GIT_VERSION)\"
ccflags-y += -I$(VMEBRIDGE_ABS)/include -I$(FPGA_MGR_ABS)/include
KBUILD_EXTRA_SYMBOLS += $(VMEBRIDGE_ABS)/driver/Module.symvers
KBUILD_EXTRA_SYMBOLS += $(FPGA_MGR_ABS)/drivers/fpga/Module.symvers
obj-m := svec.o
svec-objs := svec-core.o
kernel/Makefile 0 → 100644
View file @ d1acc791
# include parent_common.mk for buildsystem's defines
#use absolute path for REPO_PARENT
REPO_PARENT ?= $(shell /bin/pwd)/../..
-include $(REPO_PARENT)/parent_common.mk
LINUX ?= /lib/modules/$(shell uname -r)/build
VMEBRIDGE_ABS ?= $(abspath $(VMEBRIDGE))
FPGA_MGR_ABS ?= $(abspath $(FPGA_MGR))
GIT_VERSION = $(shell git describe --dirty --long --tags)
export GIT_VERSION
all: modules
.PHONY: all modules clean help install modules_install
modules help install modules_install:
$(MAKE) -C $(LINUX) M=$(shell pwd) GIT_VERSION=$(GIT_VERSION) VMEBRIDGE_ABS=$(VMEBRIDGE_ABS) FPGA_MGR_ABS=$(FPGA_MGR_ABS) $@
# be able to run the "clean" rule even if $(LINUX) is not valid
clean:
rm -rf *.o *~ .*.cmd *.ko *.mod.c .tmp_versions Module.symvers \
Module.markers modules.order
kernel/hw/xloader_regs.h 0 → 100644
View file @ d1acc791
/*
Register definitions for slave core: Xilinx FPGA loader
* File : xloader_regs.h
* Author : auto-generated by wbgen2 from xloader_wb.wb
* Created : Thu Jun 21 15:17:30 2012
* Standard : ANSI C
THIS FILE WAS GENERATED BY wbgen2 FROM SOURCE FILE xloader_wb.wb
DO NOT HAND-EDIT UNLESS IT'S ABSOLUTELY NECESSARY!
*/
#ifndef __WBGEN2_REGDEFS_XLOADER_WB_WB
#define __WBGEN2_REGDEFS_XLOADER_WB_WB
#if defined( __GNUC__)
#define PACKED __attribute__ ((packed))
#else
#error "Unsupported compiler?"
#endif
#ifndef __WBGEN2_MACROS_DEFINED__
#define __WBGEN2_MACROS_DEFINED__
#define WBGEN2_GEN_MASK(offset, size) (((1<<(size))-1) << (offset))
#define WBGEN2_GEN_WRITE(value, offset, size) (((value) & ((1<<(size))-1)) << (offset))
#define WBGEN2_GEN_READ(reg, offset, size) (((reg) >> (offset)) & ((1<<(size))-1))
#define WBGEN2_SIGN_EXTEND(value, bits) (((value) & (1<<bits) ? ~((1<<(bits))-1): 0 ) | (value))
#endif
/* definitions for register: Control/status register */
/* definitions for field: Start configuration in reg: Control/status register */
#define XLDR_CSR_START WBGEN2_GEN_MASK(0, 1)
/* definitions for field: Configuration done in reg: Control/status register */
#define XLDR_CSR_DONE WBGEN2_GEN_MASK(1, 1)
/* definitions for field: Configuration error in reg: Control/status register */
#define XLDR_CSR_ERROR WBGEN2_GEN_MASK(2, 1)
/* definitions for field: Loader busy in reg: Control/status register */
#define XLDR_CSR_BUSY WBGEN2_GEN_MASK(3, 1)
/* definitions for field: Byte order select in reg: Control/status register */
#define XLDR_CSR_MSBF WBGEN2_GEN_MASK(4, 1)
/* definitions for field: Software resest in reg: Control/status register */
#define XLDR_CSR_SWRST WBGEN2_GEN_MASK(5, 1)
/* definitions for field: Exit bootloader mode in reg: Control/status register */
#define XLDR_CSR_EXIT WBGEN2_GEN_MASK(6, 1)
/* definitions for field: Serial clock divider in reg: Control/status register */
#define XLDR_CSR_CLKDIV_MASK WBGEN2_GEN_MASK(8, 6)
#define XLDR_CSR_CLKDIV_SHIFT 8
#define XLDR_CSR_CLKDIV_W(value) WBGEN2_GEN_WRITE(value, 8, 6)
#define XLDR_CSR_CLKDIV_R(reg) WBGEN2_GEN_READ(reg, 8, 6)
/* definitions for register: Bootloader Trigger Register */
/* definitions for register: GPIO Output Register */
/* definitions for register: ID Register */
/* definitions for register: FIFO 'Bitstream FIFO' data input register 0 */
/* definitions for field: Entry size in reg: FIFO 'Bitstream FIFO' data input register 0 */
#define XLDR_FIFO_R0_XSIZE_MASK WBGEN2_GEN_MASK(0, 2)
#define XLDR_FIFO_R0_XSIZE_SHIFT 0
#define XLDR_FIFO_R0_XSIZE_W(value) WBGEN2_GEN_WRITE(value, 0, 2)
#define XLDR_FIFO_R0_XSIZE_R(reg) WBGEN2_GEN_READ(reg, 0, 2)
/* definitions for field: Last xfer in reg: FIFO 'Bitstream FIFO' data input register 0 */
#define XLDR_FIFO_R0_XLAST WBGEN2_GEN_MASK(2, 1)
/* definitions for register: FIFO 'Bitstream FIFO' data input register 1 */
/* definitions for field: Data in reg: FIFO 'Bitstream FIFO' data input register 1 */
#define XLDR_FIFO_R1_XDATA_MASK WBGEN2_GEN_MASK(0, 32)
#define XLDR_FIFO_R1_XDATA_SHIFT 0
#define XLDR_FIFO_R1_XDATA_W(value) WBGEN2_GEN_WRITE(value, 0, 32)
#define XLDR_FIFO_R1_XDATA_R(reg) WBGEN2_GEN_READ(reg, 0, 32)
/* definitions for register: FIFO 'Bitstream FIFO' control/status register */
/* definitions for field: FIFO full flag in reg: FIFO 'Bitstream FIFO' control/status register */
#define XLDR_FIFO_CSR_FULL WBGEN2_GEN_MASK(16, 1)
/* definitions for field: FIFO empty flag in reg: FIFO 'Bitstream FIFO' control/status register */
#define XLDR_FIFO_CSR_EMPTY WBGEN2_GEN_MASK(17, 1)
/* definitions for field: FIFO clear in reg: FIFO 'Bitstream FIFO' control/status register */
#define XLDR_FIFO_CSR_CLEAR_BUS WBGEN2_GEN_MASK(18, 1)
/* definitions for field: FIFO counter in reg: FIFO 'Bitstream FIFO' control/status register */
#define XLDR_FIFO_CSR_USEDW_MASK WBGEN2_GEN_MASK(0, 8)
#define XLDR_FIFO_CSR_USEDW_SHIFT 0
#define XLDR_FIFO_CSR_USEDW_W(value) WBGEN2_GEN_WRITE(value, 0, 8)
#define XLDR_FIFO_CSR_USEDW_R(reg) WBGEN2_GEN_READ(reg, 0, 8)
/* [0x0]: REG Control/status register */
#define XLDR_REG_CSR 0x00000000
/* [0x4]: REG Bootloader Trigger Register */
#define XLDR_REG_BTRIGR 0x00000004
/* [0x8]: REG GPIO Output Register */
#define XLDR_REG_GPIOR 0x00000008
/* [0xc]: REG ID Register */
#define XLDR_REG_IDR 0x0000000c
/* [0x10]: REG FIFO 'Bitstream FIFO' data input register 0 */
#define XLDR_REG_FIFO_R0 0x00000010
/* [0x14]: REG FIFO 'Bitstream FIFO' data input register 1 */
#define XLDR_REG_FIFO_R1 0x00000014
/* [0x18]: REG FIFO 'Bitstream FIFO' control/status register */
#define XLDR_REG_FIFO_CSR 0x00000018
#endif
kernel/svec-core.c 0 → 100644
View file @ d1acc791
/*
* SPDX-License-Identifier: GPLv2
*
* Copyright (C) 2017 CERN (www.cern.ch)
* Author: Federico Vaga <federico.vaga@cern.ch>
*
* Based on the SVEC version of:
* Author: Juan David Gonzalez Cobas <dcobas@cern.ch>
* Author: Luis Fernando Ruiz Gago <lfruiz@cern.ch>
* Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
* Released according to the GNU GPL, version 2 or any later version
*
* Driver for SVEC (Simple VME FMC carrier) board.
*/
#include <linux/bitmap.h>
#include <linux/cdev.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/fs.h>
#include <linux/io.h>
#include <linux/jhash.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/vmalloc.h>
#include <linux/fpga/fpga-mgr.h>
#include <vmebus.h>
#include "hw/xloader_regs.h"
#define SVEC_BASE_LOADER 0x70000
static void svec_csr_write(u8 value, void *base, u32 offset)
{
offset -= offset % 4;
iowrite32be(value, base + offset);
}
/**
* Byte sequence to unlock and clear the Application FPGA
*/
static const uint32_t boot_unlock_sequence[8] = {
0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0xba, 0xbe
};
/**
* struct svec_dev - SVEC instance
* It describes a SVEC device instance.
* @vdev VME device instance
* @bitstream_last_word last data to write into the FPGA
* @bistream_last_word_size last data size to write in the FPGA. This is a dirty
* and ugly hack in order to properly handle a dirty
* and ugly interface. The SVEC bootloader does not
* accept emtpy transfers and neither to declare the
* transmission over without sending data.
* @fpgA_status state of the Application FPGA
* The user must lock the spinlock `lock` when using the following variables in
* this data structure: flags.
*/
struct svec_dev {
struct vme_dev *vdev;
char name[8];
uint32_t bitstream_last_word;
uint32_t bitstream_last_word_size;
enum fpga_mgr_states fpga_status;
};
/**
* Writes a "magic" unlock sequence, activating the System FPGA bootloader
* regardless of what is going on in the Application FPGA. This clears
* the Application FPGA as well by resetting the FPGA chip.
* @svec a valid SVEC device instance
* Return: 0 on success, otherwise a negative errno number
*/
static int svec_fpga_reset(struct fpga_manager *mgr)
{
struct svec_dev *svec = mgr->priv;
void *loader_addr = svec->vdev->map_cr.kernel_va + SVEC_BASE_LOADER;
int i;
for (i = 0; i < 8; i++) {
iowrite32be(boot_unlock_sequence[i],
loader_addr + XLDR_REG_BTRIGR);
mdelay(1);
}
return 0;
}
/**
* Checks if the SVEC is in bootloader mode. If true, it implies that
* the Appliocation FPGA has no bitstream loaded.
* @svec a valid SVEC device instance
* Return: 1 if it is active (unlocked), 0 if it is not active (locked),
* otherwise a negative errno number
*/
static int svec_fpga_loader_is_active(struct fpga_manager *mgr)
{
struct svec_dev *svec = mgr->priv;
void *loader_addr = svec->vdev->map_cr.kernel_va + SVEC_BASE_LOADER;
char buf[5];
uint32_t idc;
idc = ioread32be(loader_addr + XLDR_REG_IDR);
idc = htonl(idc);
memset(buf, 0, 5);
strncpy(buf, (char *)&idc, 4);
return (strncmp(buf, "SVEC", 4) == 0);
}
/**
* It is usable only when there is a valid CR/CSR space mapped
* @mgr FPGA manager instance
* @word the bytes to write
* @size the number of valid bytes in the word
* @is_last 1 if this is the last word of a bitstream
* Return 0 on success, otherwise a negative errno number.
* EAGAIN the loader FIFO was temporary full, retry
* EINVAL invalid size
*/
static int svec_fpga_write_word(struct fpga_manager *mgr,
const uint32_t word, ssize_t size,
unsigned int is_last)
{
struct svec_dev *svec = mgr->priv;
void *loader_addr = svec->vdev->map_cr.kernel_va + SVEC_BASE_LOADER;
uint32_t xldr_fifo_r0; /* Bitstream data input control register */
uint32_t xldr_fifo_r1; /* Bitstream data input register */
int rv, try = 10000;
static int cnt = 0;
if (size <= 0 || size >= 5) {
return -EINVAL;
}
xldr_fifo_r0 = ((size - 1) & 0x3) | (is_last ? XLDR_FIFO_R0_XLAST : 0);
xldr_fifo_r1 = htonl(word);
do {
rv = ioread32be(loader_addr + XLDR_REG_FIFO_CSR);
} while (rv & XLDR_FIFO_CSR_FULL && --try >= 0);
if(rv & XLDR_FIFO_CSR_FULL)
return -EBUSY; /* bootloader busy */
iowrite32be(xldr_fifo_r0, loader_addr + XLDR_REG_FIFO_R0);
iowrite32be(xldr_fifo_r1, loader_addr + XLDR_REG_FIFO_R1);
cnt++;
return 0;
}
/**
* It starts the programming procedure
* It is usable only when there is a valid CR/CSR space mapped
* @mgr FPGA manager instance
* Return 0 on success, otherwise a negative errno number.
*/
static int svec_fpga_write_start(struct fpga_manager *mgr)
{
struct svec_dev *svec = mgr->priv;
void *loader_addr = svec->vdev->map_cr.kernel_va + SVEC_BASE_LOADER;
int err, succ;
/* reset the FPGA */
err = svec_fpga_reset(mgr);
if (err) {
dev_err(&mgr->dev, "FPGA reset failed\n");
goto err_reset;
}
/* check if the FPGA loader is active */
succ = svec_fpga_loader_is_active(mgr);
if (!succ) {
dev_err(&mgr->dev, "FPGA loader unavailable\n");
err = -ENXIO;
goto err_active;
}
/* Reset the Xilinx Passive Serial boot interface */
iowrite32be(XLDR_CSR_SWRST,
loader_addr + XLDR_REG_CSR);
/* Start configuration process by providing BigEndian data */
iowrite32be(XLDR_CSR_START | XLDR_CSR_MSBF,
loader_addr + XLDR_REG_CSR);
err_active:
err_reset:
return err;
}
/**
* It starts the programming procedure.
* It is usable only when there is a valid CR/CSR space mapped
* @mgr FPGA manager instance
* Return 0 on success, otherwise a negative errno number
*/
static int svec_fpga_write_stop(struct fpga_manager *mgr,
struct fpga_image_info *info)
{
struct svec_dev *svec = mgr->priv;
void *loader_addr = svec->vdev->map_cr.kernel_va + SVEC_BASE_LOADER;
u64 timeout;
int rval = 0, err;
err = svec_fpga_write_word(mgr,
svec->bitstream_last_word,
svec->bitstream_last_word_size,
1);
if (err == -EINVAL)
err = 0;
if (err)
goto out;
/* Reset the bitstream programming words */
svec->bitstream_last_word = -1;
svec->bitstream_last_word_size = -1;
/* Two seconds later */
timeout = get_jiffies_64() + usecs_to_jiffies(info->config_complete_timeout_us);
while (time_before64(get_jiffies_64(), timeout)) {
rval = ioread32be(loader_addr + XLDR_REG_CSR);
if (rval & XLDR_CSR_DONE)
break;
msleep(1);
}
if (!(rval & XLDR_CSR_DONE)) {
dev_err(&mgr->dev, "error: FPGA program timeout.\n");
err = -EIO;
}
if (rval & XLDR_CSR_ERROR) {
dev_err(&mgr->dev, "Bitstream loaded, status ERROR\n");
err = -EINVAL;
}
out:
/* give the VME bus control to App FPGA */
iowrite32be(XLDR_CSR_EXIT, loader_addr + XLDR_REG_CSR);
/* give the VME core a little while to settle up */
msleep(10);
return err;
}
/**
* It writes the given buffer into the FPGA
* @mgr FPGA manager instance
* @buf data buffer to write
* @size buffer size
* Return the number of written bytes on success (greater or equal to zero),
* otherwise a negative errno number
*/
static size_t svec_fpga_write_buf(struct fpga_manager *mgr,
const void *buf, size_t size)
{
struct svec_dev *svec = mgr->priv;
const uint32_t *data = buf;
int i, err = 0;
i = 0;
while (i < size) {
err = svec_fpga_write_word(mgr,
svec->bitstream_last_word,
svec->bitstream_last_word_size,
0);
if (err && !(err == -EINVAL && i == 0))
goto out;
/*
* EINVAL is "fine" here because the first time we give a
* wrong size in order to have a working hack
*/
svec->bitstream_last_word = data[i >> 2];
svec->bitstream_last_word_size = (size - i > 4 ? 4 : size - i);
i += svec->bitstream_last_word_size;
}
err = 0;
out:
return err;
}
static enum fpga_mgr_states svec_fpga_state(struct fpga_manager *mgr)
{
return mgr->state;
}
static int svec_fpga_write_init(struct fpga_manager *mgr,
struct fpga_image_info *info,
const char *buf, size_t count)
{
struct svec_dev *svec = mgr->priv;
/* Reset the bitstream programming words */
svec->bitstream_last_word = -1;
svec->bitstream_last_word_size = -1;
return svec_fpga_write_start(mgr);
}
static int svec_fpga_write(struct fpga_manager *mgr, const char *buf, size_t count)
{
return svec_fpga_write_buf(mgr, buf, count);
}
static int svec_fpga_write_complete(struct fpga_manager *mgr,
struct fpga_image_info *info)
{
return svec_fpga_write_stop(mgr, info);
}
static void svec_fpga_remove(struct fpga_manager *mgr)
{
/* do nothing */
}
static const struct fpga_manager_ops svec_fpga_ops = {
.initial_header_size = 0,
.state = svec_fpga_state,
.write_init = svec_fpga_write_init,
.write = svec_fpga_write,
.write_complete = svec_fpga_write_complete,
.fpga_remove = svec_fpga_remove,
};
#define SVEC_USER_CSR_INT_LEVEL 0x7FF5B
#define SVEC_USER_CSR_INT_VECTOR 0x7FF5F
static int svec_vme_init(struct svec_dev *svec)
{
struct vme_dev *vdev = svec->vdev;
int err;
err = vme_csr_enable(vdev, 0);
if (err)
return err;
/* Configure the SVEC VME interface */
svec_csr_write(vdev->irq_vector, vdev->map_cr.kernel_va,
SVEC_USER_CSR_INT_VECTOR);
svec_csr_write(vdev->irq_level, vdev->map_cr.kernel_va,
SVEC_USER_CSR_INT_LEVEL);
err = vme_csr_enable(vdev, 1);
if (err)
return err;
return 0;
}
/**
* It initialize a new SVEC instance
* @pdev correspondend Linux device instance
* @ndev (Deprecated) device number
* Return: 0 on success, otherwise a negative number correspondent to an errno
*/
static int svec_probe(struct device *dev, unsigned int ndev)
{
struct vme_dev *vdev = to_vme_dev(dev);
struct svec_dev *svec;
int err;
svec = kzalloc(sizeof(struct svec_dev), GFP_KERNEL);
if (!svec) {
err = -ENOMEM;
goto err;
}
svec->vdev = vdev;
svec->fpga_status = FPGA_MGR_STATE_UNKNOWN;
snprintf(svec->name, 8, "svec.%d", vdev->slot);
err = fpga_mgr_register(&svec->vdev->dev, svec->name,
&svec_fpga_ops, svec);
if (err)
goto err_fpga_reg;
svec_vme_init(svec);
return 0;
err_fpga_reg:
kfree(svec);
err:
dev_err(dev, "Failed to register SVEC device\n");
return err;
}
/**
* It removes a SVEC device instance
* @vdev Linux device pointer
* @ndev DEPRECATED Device instance
* Return: 0 on success, otherwise a negative errno number
*/
static int svec_remove(struct device *vdev, unsigned int ndev)
{
fpga_mgr_unregister(vdev);
return 0;
}
/**
* List of supported SVEC instances.
* Note that the CR space is part of the FPGA, so different FPGAs may have
* different IDs but they can be SVEC compatible. For example, and FMC-TDC
* bitstream for SVEC it is compatible even if it is a bitstream that drivers
* the FMC mezzanines as well.
* For the time being this case is not considered.
*/
static const struct vme_device_id svec_id_table[] = {
{"fmc-svec-a24", 0x00080030, 0x00000198, 0x00000001},
{"fmc-svec-a32", 0x00080030, 0x00000198, 0x00000001},
{"\0", 0, 0, 0},
};
static struct vme_driver svec_driver = {
.probe = svec_probe,
.remove = svec_remove,
.driver = {
.name = KBUILD_MODNAME,
},
.id_table = svec_id_table,
};
static int __init svec_init(void)
{
return vme_register_driver(&svec_driver, 0);
}
static void __exit svec_exit(void)
{
vme_unregister_driver(&svec_driver);
}
module_init(svec_init);
module_exit(svec_exit);
MODULE_AUTHOR("Federico Vaga <federico.vaga@cern.ch>");
MODULE_AUTHOR("Juan David Gonzalez Cobas <dcobas@cern.ch>");
MODULE_LICENSE("GPL v2");
MODULE_VERSION(GIT_VERSION);
MODULE_DESCRIPTION("svec driver");
ADDITIONAL_VERSIONS;
unittest/SvecTestProgramming.py 0 → 100644
View file @ d1acc791
import os
import unittest
class SvecTestProgramming(unittest.TestCase):
def setUp(self):
slot = os.environ["VME_SLOT"]
self.file_path = "/sys/bus/vme/devices/vme.{}/svec/svec.{}/AFPGA/lock".format(slot, slot)
self.dev_path = "/dev/svec.{}".format(slot)
self.bitstream = os.environ["BITSTREAM"]
def test_01(self):
"""It writes a dummy FPGA bitstream"""
with open(self.file_path, "w") as f:
f.write("unlock")
with open(self.bitstream, "rb") as d:
with open(self.dev_path, "wb") as f:
f.write(d.read())
with open(self.file_path, "r") as f:
val = f.read().strip()
self.assertEqual(val, "locked")
unittest/SvecTestProgrammingLock.py 0 → 100644
View file @ d1acc791
import os
import random
import string
import unittest
class SvecTestProgrammingLock(unittest.TestCase):
def setUp(self):
slot = os.environ["VME_SLOT"]
self.file_path = "/sys/bus/vme/devices/vme.{}/svec/svec.{}/AFPGA/lock".format(slot, slot)
self.dev_path = "/dev/svec.{}".format(slot)
def test_01(self):
"""It flips the previous lock status"""
with open(self.file_path, "r") as f:
val = f.read().strip()
for i in range(2):
new = "lock" if val == "unlocked" else "unlock"
with open(self.file_path, "w") as f:
f.write(new)
with open(self.file_path, "r") as f:
val = f.read().strip()
self.assertEqual(val, "{}ed".format(new))
def test_02(self):
"""It writes invalid commands to the lock attribute"""
chars = (random.choice(string.ascii_uppercase) for _ in range(3))
with self.assertRaises(OSError):
with open(self.file_path) as f:
f.write(''.join(chars))
def test_03(self):
"""It unlocks the programming"""
with open(self.file_path, "w") as f:
f.write("unlock")
with open(self.file_path, "r") as f:
val = f.read().strip()
self.assertEqual(val, "unlocked")
# we should be able to open the device
with open(self.dev_path) as f:
pass
# It should lock automatically
with open(self.file_path, "r") as f:
val = f.read().strip()
self.assertEqual(val, "locked")
def test_04(self):
"""It locks the programming"""
with open(self.file_path, "w") as f:
f.write("lock")
with open(self.file_path, "r") as f:
val = f.read().strip()
self.assertEqual(val, "locked")
# we should not be able to open the device
with self.assertRaises(OSError):
f = open(self.dev_path)
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