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authorHemant Agrawal <hemant.agrawal@nxp.com>2018-02-22 11:39:05 +0530
committerThomas Monjalon <thomas@monjalon.net>2018-03-21 23:04:21 +0100
commitacaa9ee991b584d536ffa9529f063d11be7923a4 (patch)
treef713585b17b7d515f1f87711b5903b573258032e /kernel/freebsd
parent48595b8d559e362f0732a6453993c7afc092948c (diff)
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move kernel modules directories
This patch moves the kernel modules code from EAL to a common place. - Separate the kernel module code from user space code. Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com> Tested-by: Bruce Richardson <bruce.richardson@intel.com>
Diffstat (limited to 'kernel/freebsd')
-rw-r--r--kernel/freebsd/BSDmakefile.meson43
-rw-r--r--kernel/freebsd/Makefile9
-rw-r--r--kernel/freebsd/contigmem/BSDmakefile8
-rw-r--r--kernel/freebsd/contigmem/Makefile24
-rw-r--r--kernel/freebsd/contigmem/contigmem.c353
-rw-r--r--kernel/freebsd/contigmem/meson.build4
-rw-r--r--kernel/freebsd/nic_uio/BSDmakefile8
-rw-r--r--kernel/freebsd/nic_uio/Makefile24
-rw-r--r--kernel/freebsd/nic_uio/meson.build4
-rw-r--r--kernel/freebsd/nic_uio/nic_uio.c350
10 files changed, 827 insertions, 0 deletions
diff --git a/kernel/freebsd/BSDmakefile.meson b/kernel/freebsd/BSDmakefile.meson
new file mode 100644
index 0000000..42f5b2b
--- /dev/null
+++ b/kernel/freebsd/BSDmakefile.meson
@@ -0,0 +1,43 @@
+# BSD LICENSE
+#
+# Copyright(c) 2017 Intel Corporation. All rights reserved.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of Intel Corporation nor the names of its
+# contributors may be used to endorse or promote products derived
+# from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+# makefile for building kernel modules using meson
+# takes parameters from the environment
+
+# source file is passed via KMOD_SRC as full path, we only use final
+# component of it, as VPATH is used to find actual file, so as to
+# have the .o files placed in the build, not source directory
+VPATH = ${KMOD_SRC:H}
+SRCS = ${KMOD_SRC:T} device_if.h bus_if.h pci_if.h
+CFLAGS += $(KMOD_CFLAGS)
+
+.include <bsd.kmod.mk>
diff --git a/kernel/freebsd/Makefile b/kernel/freebsd/Makefile
new file mode 100644
index 0000000..c93d7a6
--- /dev/null
+++ b/kernel/freebsd/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2017 NXP
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+DIRS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += contigmem
+DIRS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += nic_uio
+
+include $(RTE_SDK)/mk/rte.subdir.mk
diff --git a/kernel/freebsd/contigmem/BSDmakefile b/kernel/freebsd/contigmem/BSDmakefile
new file mode 100644
index 0000000..33ce83e
--- /dev/null
+++ b/kernel/freebsd/contigmem/BSDmakefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2010-2014 Intel Corporation
+#
+
+KMOD= contigmem
+SRCS= contigmem.c device_if.h bus_if.h
+
+.include <bsd.kmod.mk>
diff --git a/kernel/freebsd/contigmem/Makefile b/kernel/freebsd/contigmem/Makefile
new file mode 100644
index 0000000..428a7ed
--- /dev/null
+++ b/kernel/freebsd/contigmem/Makefile
@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2010-2014 Intel Corporation
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+#
+# module name and path
+#
+MODULE = contigmem
+
+#
+# CFLAGS
+#
+MODULE_CFLAGS += -I$(SRCDIR)
+MODULE_CFLAGS += -I$(RTE_OUTPUT)/include
+MODULE_CFLAGS += -Winline -Wall -Werror
+MODULE_CFLAGS += -include $(RTE_OUTPUT)/include/rte_config.h
+
+#
+# all source are stored in SRCS-y
+#
+SRCS-y := contigmem.c
+
+include $(RTE_SDK)/mk/rte.bsdmodule.mk
diff --git a/kernel/freebsd/contigmem/contigmem.c b/kernel/freebsd/contigmem/contigmem.c
new file mode 100644
index 0000000..1715b5d
--- /dev/null
+++ b/kernel/freebsd/contigmem/contigmem.c
@@ -0,0 +1,353 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/bio.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/proc.h>
+#include <sys/rwlock.h>
+#include <sys/systm.h>
+#include <sys/sysctl.h>
+#include <sys/vmmeter.h>
+
+#include <machine/bus.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_param.h>
+#include <vm/vm_object.h>
+#include <vm/vm_page.h>
+#include <vm/vm_pager.h>
+#include <vm/vm_phys.h>
+
+struct contigmem_buffer {
+ void *addr;
+ int refcnt;
+ struct mtx mtx;
+};
+
+struct contigmem_vm_handle {
+ int buffer_index;
+};
+
+static int contigmem_load(void);
+static int contigmem_unload(void);
+static int contigmem_physaddr(SYSCTL_HANDLER_ARGS);
+
+static d_mmap_single_t contigmem_mmap_single;
+static d_open_t contigmem_open;
+static d_close_t contigmem_close;
+
+static int contigmem_num_buffers = RTE_CONTIGMEM_DEFAULT_NUM_BUFS;
+static int64_t contigmem_buffer_size = RTE_CONTIGMEM_DEFAULT_BUF_SIZE;
+
+static eventhandler_tag contigmem_eh_tag;
+static struct contigmem_buffer contigmem_buffers[RTE_CONTIGMEM_MAX_NUM_BUFS];
+static struct cdev *contigmem_cdev = NULL;
+static int contigmem_refcnt;
+
+TUNABLE_INT("hw.contigmem.num_buffers", &contigmem_num_buffers);
+TUNABLE_QUAD("hw.contigmem.buffer_size", &contigmem_buffer_size);
+
+static SYSCTL_NODE(_hw, OID_AUTO, contigmem, CTLFLAG_RD, 0, "contigmem");
+
+SYSCTL_INT(_hw_contigmem, OID_AUTO, num_buffers, CTLFLAG_RD,
+ &contigmem_num_buffers, 0, "Number of contigmem buffers allocated");
+SYSCTL_QUAD(_hw_contigmem, OID_AUTO, buffer_size, CTLFLAG_RD,
+ &contigmem_buffer_size, 0, "Size of each contiguous buffer");
+SYSCTL_INT(_hw_contigmem, OID_AUTO, num_references, CTLFLAG_RD,
+ &contigmem_refcnt, 0, "Number of references to contigmem");
+
+static SYSCTL_NODE(_hw_contigmem, OID_AUTO, physaddr, CTLFLAG_RD, 0,
+ "physaddr");
+
+MALLOC_DEFINE(M_CONTIGMEM, "contigmem", "contigmem(4) allocations");
+
+static int contigmem_modevent(module_t mod, int type, void *arg)
+{
+ int error = 0;
+
+ switch (type) {
+ case MOD_LOAD:
+ error = contigmem_load();
+ break;
+ case MOD_UNLOAD:
+ error = contigmem_unload();
+ break;
+ default:
+ break;
+ }
+
+ return error;
+}
+
+moduledata_t contigmem_mod = {
+ "contigmem",
+ (modeventhand_t)contigmem_modevent,
+ 0
+};
+
+DECLARE_MODULE(contigmem, contigmem_mod, SI_SUB_DRIVERS, SI_ORDER_ANY);
+MODULE_VERSION(contigmem, 1);
+
+static struct cdevsw contigmem_ops = {
+ .d_name = "contigmem",
+ .d_version = D_VERSION,
+ .d_flags = D_TRACKCLOSE,
+ .d_mmap_single = contigmem_mmap_single,
+ .d_open = contigmem_open,
+ .d_close = contigmem_close,
+};
+
+static int
+contigmem_load()
+{
+ char index_string[8], description[32];
+ int i, error = 0;
+ void *addr;
+
+ if (contigmem_num_buffers > RTE_CONTIGMEM_MAX_NUM_BUFS) {
+ printf("%d buffers requested is greater than %d allowed\n",
+ contigmem_num_buffers, RTE_CONTIGMEM_MAX_NUM_BUFS);
+ error = EINVAL;
+ goto error;
+ }
+
+ if (contigmem_buffer_size < PAGE_SIZE ||
+ (contigmem_buffer_size & (contigmem_buffer_size - 1)) != 0) {
+ printf("buffer size 0x%lx is not greater than PAGE_SIZE and "
+ "power of two\n", contigmem_buffer_size);
+ error = EINVAL;
+ goto error;
+ }
+
+ for (i = 0; i < contigmem_num_buffers; i++) {
+ addr = contigmalloc(contigmem_buffer_size, M_CONTIGMEM, M_ZERO,
+ 0, BUS_SPACE_MAXADDR, contigmem_buffer_size, 0);
+ if (addr == NULL) {
+ printf("contigmalloc failed for buffer %d\n", i);
+ error = ENOMEM;
+ goto error;
+ }
+
+ printf("%2u: virt=%p phys=%p\n", i, addr,
+ (void *)pmap_kextract((vm_offset_t)addr));
+
+ mtx_init(&contigmem_buffers[i].mtx, "contigmem", NULL, MTX_DEF);
+ contigmem_buffers[i].addr = addr;
+ contigmem_buffers[i].refcnt = 0;
+
+ snprintf(index_string, sizeof(index_string), "%d", i);
+ snprintf(description, sizeof(description),
+ "phys addr for buffer %d", i);
+ SYSCTL_ADD_PROC(NULL,
+ &SYSCTL_NODE_CHILDREN(_hw_contigmem, physaddr), OID_AUTO,
+ index_string, CTLTYPE_U64 | CTLFLAG_RD,
+ (void *)(uintptr_t)i, 0, contigmem_physaddr, "LU",
+ description);
+ }
+
+ contigmem_cdev = make_dev_credf(0, &contigmem_ops, 0, NULL, UID_ROOT,
+ GID_WHEEL, 0600, "contigmem");
+
+ return 0;
+
+error:
+ for (i = 0; i < contigmem_num_buffers; i++) {
+ if (contigmem_buffers[i].addr != NULL)
+ contigfree(contigmem_buffers[i].addr,
+ contigmem_buffer_size, M_CONTIGMEM);
+ if (mtx_initialized(&contigmem_buffers[i].mtx))
+ mtx_destroy(&contigmem_buffers[i].mtx);
+ }
+
+ return error;
+}
+
+static int
+contigmem_unload()
+{
+ int i;
+
+ if (contigmem_refcnt > 0)
+ return EBUSY;
+
+ if (contigmem_cdev != NULL)
+ destroy_dev(contigmem_cdev);
+
+ if (contigmem_eh_tag != NULL)
+ EVENTHANDLER_DEREGISTER(process_exit, contigmem_eh_tag);
+
+ for (i = 0; i < RTE_CONTIGMEM_MAX_NUM_BUFS; i++) {
+ if (contigmem_buffers[i].addr != NULL)
+ contigfree(contigmem_buffers[i].addr,
+ contigmem_buffer_size, M_CONTIGMEM);
+ if (mtx_initialized(&contigmem_buffers[i].mtx))
+ mtx_destroy(&contigmem_buffers[i].mtx);
+ }
+
+ return 0;
+}
+
+static int
+contigmem_physaddr(SYSCTL_HANDLER_ARGS)
+{
+ uint64_t physaddr;
+ int index = (int)(uintptr_t)arg1;
+
+ physaddr = (uint64_t)vtophys(contigmem_buffers[index].addr);
+ return sysctl_handle_64(oidp, &physaddr, 0, req);
+}
+
+static int
+contigmem_open(struct cdev *cdev, int fflags, int devtype,
+ struct thread *td)
+{
+
+ atomic_add_int(&contigmem_refcnt, 1);
+
+ return 0;
+}
+
+static int
+contigmem_close(struct cdev *cdev, int fflags, int devtype,
+ struct thread *td)
+{
+
+ atomic_subtract_int(&contigmem_refcnt, 1);
+
+ return 0;
+}
+
+static int
+contigmem_cdev_pager_ctor(void *handle, vm_ooffset_t size, vm_prot_t prot,
+ vm_ooffset_t foff, struct ucred *cred, u_short *color)
+{
+ struct contigmem_vm_handle *vmh = handle;
+ struct contigmem_buffer *buf;
+
+ buf = &contigmem_buffers[vmh->buffer_index];
+
+ atomic_add_int(&contigmem_refcnt, 1);
+
+ mtx_lock(&buf->mtx);
+ if (buf->refcnt == 0)
+ memset(buf->addr, 0, contigmem_buffer_size);
+ buf->refcnt++;
+ mtx_unlock(&buf->mtx);
+
+ return 0;
+}
+
+static void
+contigmem_cdev_pager_dtor(void *handle)
+{
+ struct contigmem_vm_handle *vmh = handle;
+ struct contigmem_buffer *buf;
+
+ buf = &contigmem_buffers[vmh->buffer_index];
+
+ mtx_lock(&buf->mtx);
+ buf->refcnt--;
+ mtx_unlock(&buf->mtx);
+
+ free(vmh, M_CONTIGMEM);
+
+ atomic_subtract_int(&contigmem_refcnt, 1);
+}
+
+static int
+contigmem_cdev_pager_fault(vm_object_t object, vm_ooffset_t offset, int prot,
+ vm_page_t *mres)
+{
+ vm_paddr_t paddr;
+ vm_page_t m_paddr, page;
+ vm_memattr_t memattr, memattr1;
+
+ memattr = object->memattr;
+
+ VM_OBJECT_WUNLOCK(object);
+
+ paddr = offset;
+
+ m_paddr = vm_phys_paddr_to_vm_page(paddr);
+ if (m_paddr != NULL) {
+ memattr1 = pmap_page_get_memattr(m_paddr);
+ if (memattr1 != memattr)
+ memattr = memattr1;
+ }
+
+ if (((*mres)->flags & PG_FICTITIOUS) != 0) {
+ /*
+ * If the passed in result page is a fake page, update it with
+ * the new physical address.
+ */
+ page = *mres;
+ VM_OBJECT_WLOCK(object);
+ vm_page_updatefake(page, paddr, memattr);
+ } else {
+ vm_page_t mret;
+ /*
+ * Replace the passed in reqpage page with our own fake page and
+ * free up the original page.
+ */
+ page = vm_page_getfake(paddr, memattr);
+ VM_OBJECT_WLOCK(object);
+ mret = vm_page_replace(page, object, (*mres)->pindex);
+ KASSERT(mret == *mres,
+ ("invalid page replacement, old=%p, ret=%p", *mres, mret));
+ vm_page_lock(mret);
+ vm_page_free(mret);
+ vm_page_unlock(mret);
+ *mres = page;
+ }
+
+ page->valid = VM_PAGE_BITS_ALL;
+
+ return VM_PAGER_OK;
+}
+
+static struct cdev_pager_ops contigmem_cdev_pager_ops = {
+ .cdev_pg_ctor = contigmem_cdev_pager_ctor,
+ .cdev_pg_dtor = contigmem_cdev_pager_dtor,
+ .cdev_pg_fault = contigmem_cdev_pager_fault,
+};
+
+static int
+contigmem_mmap_single(struct cdev *cdev, vm_ooffset_t *offset, vm_size_t size,
+ struct vm_object **obj, int nprot)
+{
+ struct contigmem_vm_handle *vmh;
+ uint64_t buffer_index;
+
+ /*
+ * The buffer index is encoded in the offset. Divide the offset by
+ * PAGE_SIZE to get the index of the buffer requested by the user
+ * app.
+ */
+ buffer_index = *offset / PAGE_SIZE;
+ if (buffer_index >= contigmem_num_buffers)
+ return EINVAL;
+
+ if (size > contigmem_buffer_size)
+ return EINVAL;
+
+ vmh = malloc(sizeof(*vmh), M_CONTIGMEM, M_NOWAIT | M_ZERO);
+ if (vmh == NULL)
+ return ENOMEM;
+ vmh->buffer_index = buffer_index;
+
+ *offset = (vm_ooffset_t)vtophys(contigmem_buffers[buffer_index].addr);
+ *obj = cdev_pager_allocate(vmh, OBJT_DEVICE, &contigmem_cdev_pager_ops,
+ size, nprot, *offset, curthread->td_ucred);
+
+ return 0;
+}
diff --git a/kernel/freebsd/contigmem/meson.build b/kernel/freebsd/contigmem/meson.build
new file mode 100644
index 0000000..8fb2ab7
--- /dev/null
+++ b/kernel/freebsd/contigmem/meson.build
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2017 Intel Corporation
+
+sources = files('contigmem.c')
diff --git a/kernel/freebsd/nic_uio/BSDmakefile b/kernel/freebsd/nic_uio/BSDmakefile
new file mode 100644
index 0000000..b6f92d5
--- /dev/null
+++ b/kernel/freebsd/nic_uio/BSDmakefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2010-2014 Intel Corporation
+#
+
+KMOD= nic_uio
+SRCS= nic_uio.c device_if.h bus_if.h pci_if.h
+
+.include <bsd.kmod.mk>
diff --git a/kernel/freebsd/nic_uio/Makefile b/kernel/freebsd/nic_uio/Makefile
new file mode 100644
index 0000000..376ef3a
--- /dev/null
+++ b/kernel/freebsd/nic_uio/Makefile
@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2010-2014 Intel Corporation
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+#
+# module name and path
+#
+MODULE = nic_uio
+
+#
+# CFLAGS
+#
+MODULE_CFLAGS += -I$(SRCDIR)
+MODULE_CFLAGS += -I$(RTE_OUTPUT)/include
+MODULE_CFLAGS += -Winline -Wall -Werror
+MODULE_CFLAGS += -include $(RTE_OUTPUT)/include/rte_config.h
+
+#
+# all source are stored in SRCS-y
+#
+SRCS-y := nic_uio.c
+
+include $(RTE_SDK)/mk/rte.bsdmodule.mk
diff --git a/kernel/freebsd/nic_uio/meson.build b/kernel/freebsd/nic_uio/meson.build
new file mode 100644
index 0000000..4bdaf96
--- /dev/null
+++ b/kernel/freebsd/nic_uio/meson.build
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2017 Intel Corporation
+
+sources = files('nic_uio.c')
diff --git a/kernel/freebsd/nic_uio/nic_uio.c b/kernel/freebsd/nic_uio/nic_uio.c
new file mode 100644
index 0000000..401b487
--- /dev/null
+++ b/kernel/freebsd/nic_uio/nic_uio.c
@@ -0,0 +1,350 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
+ */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h> /* defines used in kernel.h */
+#include <sys/module.h>
+#include <sys/kernel.h> /* types used in module initialization */
+#include <sys/conf.h> /* cdevsw struct */
+#include <sys/bus.h> /* structs, prototypes for pci bus stuff and DEVMETHOD */
+#include <sys/rman.h>
+#include <sys/systm.h>
+#include <sys/rwlock.h>
+#include <sys/proc.h>
+
+#include <machine/bus.h>
+#include <dev/pci/pcivar.h> /* For pci_get macros! */
+#include <dev/pci/pcireg.h> /* The softc holds our per-instance data. */
+#include <vm/vm.h>
+#include <vm/uma.h>
+#include <vm/vm_object.h>
+#include <vm/vm_page.h>
+#include <vm/vm_pager.h>
+
+
+#define MAX_BARS (PCIR_MAX_BAR_0 + 1)
+
+#define MAX_DETACHED_DEVICES 128
+static device_t detached_devices[MAX_DETACHED_DEVICES] = {};
+static int num_detached = 0;
+
+struct nic_uio_softc {
+ device_t dev_t;
+ struct cdev *my_cdev;
+ int bar_id[MAX_BARS];
+ struct resource *bar_res[MAX_BARS];
+ u_long bar_start[MAX_BARS];
+ u_long bar_size[MAX_BARS];
+};
+
+/* Function prototypes */
+static d_open_t nic_uio_open;
+static d_close_t nic_uio_close;
+static d_mmap_t nic_uio_mmap;
+static d_mmap_single_t nic_uio_mmap_single;
+static int nic_uio_probe(device_t dev);
+static int nic_uio_attach(device_t dev);
+static int nic_uio_detach(device_t dev);
+static int nic_uio_shutdown(void);
+static int nic_uio_modevent(module_t mod, int type, void *arg);
+
+static struct cdevsw uio_cdevsw = {
+ .d_name = "nic_uio",
+ .d_version = D_VERSION,
+ .d_open = nic_uio_open,
+ .d_close = nic_uio_close,
+ .d_mmap = nic_uio_mmap,
+ .d_mmap_single = nic_uio_mmap_single,
+};
+
+static device_method_t nic_uio_methods[] = {
+ DEVMETHOD(device_probe, nic_uio_probe),
+ DEVMETHOD(device_attach, nic_uio_attach),
+ DEVMETHOD(device_detach, nic_uio_detach),
+ DEVMETHOD_END
+};
+
+struct device {
+ int vend;
+ int dev;
+};
+
+struct pci_bdf {
+ uint32_t bus;
+ uint32_t devid;
+ uint32_t function;
+};
+
+static devclass_t nic_uio_devclass;
+
+DEFINE_CLASS_0(nic_uio, nic_uio_driver, nic_uio_methods, sizeof(struct nic_uio_softc));
+DRIVER_MODULE(nic_uio, pci, nic_uio_driver, nic_uio_devclass, nic_uio_modevent, 0);
+
+static int
+nic_uio_mmap(struct cdev *cdev, vm_ooffset_t offset, vm_paddr_t *paddr,
+ int prot, vm_memattr_t *memattr)
+{
+ *paddr = offset;
+ return 0;
+}
+
+static int
+nic_uio_mmap_single(struct cdev *cdev, vm_ooffset_t *offset, vm_size_t size,
+ struct vm_object **obj, int nprot)
+{
+ /*
+ * The BAR index is encoded in the offset. Divide the offset by
+ * PAGE_SIZE to get the index of the bar requested by the user
+ * app.
+ */
+ unsigned bar = *offset/PAGE_SIZE;
+ struct nic_uio_softc *sc = cdev->si_drv1;
+
+ if (bar >= MAX_BARS)
+ return EINVAL;
+
+ if (sc->bar_res[bar] == NULL) {
+ sc->bar_id[bar] = PCIR_BAR(bar);
+
+ if (PCI_BAR_IO(pci_read_config(sc->dev_t, sc->bar_id[bar], 4)))
+ sc->bar_res[bar] = bus_alloc_resource_any(sc->dev_t, SYS_RES_IOPORT,
+ &sc->bar_id[bar], RF_ACTIVE);
+ else
+ sc->bar_res[bar] = bus_alloc_resource_any(sc->dev_t, SYS_RES_MEMORY,
+ &sc->bar_id[bar], RF_ACTIVE);
+ }
+ if (sc->bar_res[bar] == NULL)
+ return ENXIO;
+
+ sc->bar_start[bar] = rman_get_start(sc->bar_res[bar]);
+ sc->bar_size[bar] = rman_get_size(sc->bar_res[bar]);
+
+ device_printf(sc->dev_t, "Bar %u @ %lx, size %lx\n", bar,
+ sc->bar_start[bar], sc->bar_size[bar]);
+
+ *offset = sc->bar_start[bar];
+ *obj = vm_pager_allocate(OBJT_DEVICE, cdev, size, nprot, *offset,
+ curthread->td_ucred);
+ return 0;
+}
+
+
+int
+nic_uio_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
+{
+ return 0;
+}
+
+int
+nic_uio_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
+{
+ return 0;
+}
+
+static int
+nic_uio_probe (device_t dev)
+{
+ int i;
+ unsigned int bus = pci_get_bus(dev);
+ unsigned int device = pci_get_slot(dev);
+ unsigned int function = pci_get_function(dev);
+
+ char bdf_str[256];
+ char *token, *remaining;
+
+ /* First check if we found this on load */
+ for (i = 0; i < num_detached; i++)
+ if (bus == pci_get_bus(detached_devices[i]) &&
+ device == pci_get_slot(detached_devices[i]) &&
+ function == pci_get_function(detached_devices[i])) {
+ device_set_desc(dev, "DPDK PCI Device");
+ return BUS_PROBE_SPECIFIC;
+ }
+
+ /* otherwise check if it's a new device and if it matches the BDF */
+ memset(bdf_str, 0, sizeof(bdf_str));
+ TUNABLE_STR_FETCH("hw.nic_uio.bdfs", bdf_str, sizeof(bdf_str));
+ remaining = bdf_str;
+ while (1) {
+ if (remaining == NULL || remaining[0] == '\0')
+ break;
+ token = strsep(&remaining, ",:");
+ if (token == NULL)
+ break;
+ bus = strtol(token, NULL, 10);
+ token = strsep(&remaining, ",:");
+ if (token == NULL)
+ break;
+ device = strtol(token, NULL, 10);
+ token = strsep(&remaining, ",:");
+ if (token == NULL)
+ break;
+ function = strtol(token, NULL, 10);
+
+ if (bus == pci_get_bus(dev) &&
+ device == pci_get_slot(dev) &&
+ function == pci_get_function(dev)) {
+
+ if (num_detached < MAX_DETACHED_DEVICES) {
+ printf("%s: probed dev=%p\n",
+ __func__, dev);
+ detached_devices[num_detached++] = dev;
+ device_set_desc(dev, "DPDK PCI Device");
+ return BUS_PROBE_SPECIFIC;
+ } else {
+ printf("%s: reached MAX_DETACHED_DEVICES=%d. dev=%p won't be reattached\n",
+ __func__, MAX_DETACHED_DEVICES,
+ dev);
+ break;
+ }
+ }
+ }
+
+ return ENXIO;
+}
+
+static int
+nic_uio_attach(device_t dev)
+{
+ int i;
+ struct nic_uio_softc *sc;
+
+ sc = device_get_softc(dev);
+ sc->dev_t = dev;
+ sc->my_cdev = make_dev(&uio_cdevsw, device_get_unit(dev),
+ UID_ROOT, GID_WHEEL, 0600, "uio@pci:%u:%u:%u",
+ pci_get_bus(dev), pci_get_slot(dev), pci_get_function(dev));
+ if (sc->my_cdev == NULL)
+ return ENXIO;
+ sc->my_cdev->si_drv1 = sc;
+
+ for (i = 0; i < MAX_BARS; i++)
+ sc->bar_res[i] = NULL;
+
+ pci_enable_busmaster(dev);
+
+ return 0;
+}
+
+static int
+nic_uio_detach(device_t dev)
+{
+ int i;
+ struct nic_uio_softc *sc;
+ sc = device_get_softc(dev);
+
+ for (i = 0; i < MAX_BARS; i++)
+ if (sc->bar_res[i] != NULL) {
+
+ if (PCI_BAR_IO(pci_read_config(dev, sc->bar_id[i], 4)))
+ bus_release_resource(dev, SYS_RES_IOPORT, sc->bar_id[i],
+ sc->bar_res[i]);
+ else
+ bus_release_resource(dev, SYS_RES_MEMORY, sc->bar_id[i],
+ sc->bar_res[i]);
+ }
+
+ if (sc->my_cdev != NULL)
+ destroy_dev(sc->my_cdev);
+ return 0;
+}
+
+static void
+nic_uio_load(void)
+{
+ uint32_t bus, device, function;
+ device_t dev;
+ char bdf_str[256];
+ char *token, *remaining;
+
+ memset(bdf_str, 0, sizeof(bdf_str));
+ TUNABLE_STR_FETCH("hw.nic_uio.bdfs", bdf_str, sizeof(bdf_str));
+ remaining = bdf_str;
+ printf("nic_uio: hw.nic_uio.bdfs = '%s'\n", bdf_str);
+ /*
+ * Users should specify PCI BDFs in the format "b:d:f,b:d:f,b:d:f".
+ * But the code below does not try differentiate between : and ,
+ * and just blindly uses 3 tokens at a time to construct a
+ * bus/device/function tuple.
+ *
+ * There is no checking on strtol() return values, but this should
+ * be OK. Worst case is it cannot convert and returns 0. This
+ * could give us a different BDF than intended, but as long as the
+ * PCI device/vendor ID does not match it will not matter.
+ */
+ while (1) {
+ if (remaining == NULL || remaining[0] == '\0')
+ break;
+ token = strsep(&remaining, ",:");
+ if (token == NULL)
+ break;
+ bus = strtol(token, NULL, 10);
+ token = strsep(&remaining, ",:");
+ if (token == NULL)
+ break;
+ device = strtol(token, NULL, 10);
+ token = strsep(&remaining, ",:");
+ if (token == NULL)
+ break;
+ function = strtol(token, NULL, 10);
+
+ dev = pci_find_bsf(bus, device, function);
+ if (dev == NULL)
+ continue;
+
+ if (num_detached < MAX_DETACHED_DEVICES) {
+ printf("nic_uio_load: detaching and storing dev=%p\n",
+ dev);
+ detached_devices[num_detached++] = dev;
+ } else {
+ printf("nic_uio_load: reached MAX_DETACHED_DEVICES=%d. dev=%p won't be reattached\n",
+ MAX_DETACHED_DEVICES, dev);
+ }
+ device_detach(dev);
+ }
+}
+
+static void
+nic_uio_unload(void)
+{
+ int i;
+ printf("nic_uio_unload: entered...\n");
+
+ for (i = 0; i < num_detached; i++) {
+ printf("nic_uio_unload: calling to device_probe_and_attach for dev=%p...\n",
+ detached_devices[i]);
+ device_probe_and_attach(detached_devices[i]);
+ printf("nic_uio_unload: done.\n");
+ }
+
+ printf("nic_uio_unload: leaving...\n");
+}
+
+static int
+nic_uio_shutdown(void)
+{
+ return 0;
+}
+
+static int
+nic_uio_modevent(module_t mod, int type, void *arg)
+{
+
+ switch (type) {
+ case MOD_LOAD:
+ nic_uio_load();
+ break;
+ case MOD_UNLOAD:
+ nic_uio_unload();
+ break;
+ case MOD_SHUTDOWN:
+ nic_uio_shutdown();
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}