4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
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18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h> /* defines used in kernel.h */
37 #include <sys/module.h>
38 #include <sys/kernel.h> /* types used in module initialization */
39 #include <sys/conf.h> /* cdevsw struct */
40 #include <sys/bus.h> /* structs, prototypes for pci bus stuff and DEVMETHOD */
42 #include <sys/systm.h>
45 #include <machine/bus.h>
46 #include <dev/pci/pcivar.h> /* For pci_get macros! */
47 #include <dev/pci/pcireg.h> /* The softc holds our per-instance data. */
50 #include <vm/vm_object.h>
51 #include <vm/vm_page.h>
52 #include <vm/vm_pager.h>
55 #define MAX_BARS (PCIR_MAX_BAR_0 + 1)
58 struct nic_uio_softc {
62 struct resource *bar_res[MAX_BARS];
63 u_long bar_start[MAX_BARS];
64 u_long bar_size[MAX_BARS];
67 /* Function prototypes */
68 static d_open_t nic_uio_open;
69 static d_close_t nic_uio_close;
70 static d_mmap_t nic_uio_mmap;
71 static d_mmap_single_t nic_uio_mmap_single;
72 static int nic_uio_probe(device_t dev);
73 static int nic_uio_attach(device_t dev);
74 static int nic_uio_detach(device_t dev);
75 static int nic_uio_shutdown(void);
76 static int nic_uio_modevent(module_t mod, int type, void *arg);
78 static struct cdevsw uio_cdevsw = {
80 .d_version = D_VERSION,
81 .d_open = nic_uio_open,
82 .d_close = nic_uio_close,
83 .d_mmap = nic_uio_mmap,
84 .d_mmap_single = nic_uio_mmap_single,
87 static device_method_t nic_uio_methods[] = {
88 DEVMETHOD(device_probe, nic_uio_probe),
89 DEVMETHOD(device_attach, nic_uio_attach),
90 DEVMETHOD(device_detach, nic_uio_detach),
106 #define RTE_PCI_DEV_ID_DECL_EM(vend, dev) {vend, dev},
107 #define RTE_PCI_DEV_ID_DECL_IGB(vend, dev) {vend, dev},
108 #define RTE_PCI_DEV_ID_DECL_IGBVF(vend, dev) {vend, dev},
109 #define RTE_PCI_DEV_ID_DECL_IXGBE(vend, dev) {vend, dev},
110 #define RTE_PCI_DEV_ID_DECL_IXGBEVF(vend, dev) {vend, dev},
111 #define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {vend, dev},
113 const struct device devices[] = {
114 #include <rte_pci_dev_ids.h>
116 #define NUM_DEVICES (sizeof(devices)/sizeof(devices[0]))
119 static devclass_t nic_uio_devclass;
121 DEFINE_CLASS_0(nic_uio, nic_uio_driver, nic_uio_methods, sizeof(struct nic_uio_softc));
122 DRIVER_MODULE(nic_uio, pci, nic_uio_driver, nic_uio_devclass, nic_uio_modevent, 0);
125 nic_uio_mmap(struct cdev *cdev, vm_ooffset_t offset, vm_paddr_t *paddr,
126 int prot, vm_memattr_t *memattr)
133 nic_uio_mmap_single(struct cdev *cdev, vm_ooffset_t *offset, vm_size_t size,
134 struct vm_object **obj, int nprot)
137 * The BAR index is encoded in the offset. Divide the offset by
138 * PAGE_SIZE to get the index of the bar requested by the user
141 unsigned bar = *offset/PAGE_SIZE;
142 struct nic_uio_softc *sc = cdev->si_drv1;
147 if (sc->bar_res[bar] == NULL) {
148 sc->bar_id[bar] = PCIR_BAR(bar);
150 if (PCI_BAR_IO(pci_read_config(sc->dev_t, sc->bar_id[bar], 4)))
151 sc->bar_res[bar] = bus_alloc_resource_any(sc->dev_t, SYS_RES_IOPORT,
152 &sc->bar_id[bar], RF_ACTIVE);
154 sc->bar_res[bar] = bus_alloc_resource_any(sc->dev_t, SYS_RES_MEMORY,
155 &sc->bar_id[bar], RF_ACTIVE);
157 if (sc->bar_res[bar] == NULL)
160 sc->bar_start[bar] = rman_get_start(sc->bar_res[bar]);
161 sc->bar_size[bar] = rman_get_size(sc->bar_res[bar]);
163 device_printf(sc->dev_t, "Bar %u @ %lx, size %lx\n", bar,
164 sc->bar_start[bar], sc->bar_size[bar]);
166 *offset = sc->bar_start[bar];
167 *obj = vm_pager_allocate(OBJT_DEVICE, cdev, size, nprot, *offset,
168 curthread->td_ucred);
174 nic_uio_open(struct cdev *dev, int oflags, int devtype, d_thread_t *td)
180 nic_uio_close(struct cdev *dev, int fflag, int devtype, d_thread_t *td)
186 nic_uio_probe (device_t dev)
190 for (i = 0; i < NUM_DEVICES; i++)
191 if (pci_get_vendor(dev) == devices[i].vend &&
192 pci_get_device(dev) == devices[i].dev) {
194 device_set_desc(dev, "Intel(R) DPDK PCI Device");
195 return (BUS_PROBE_SPECIFIC);
202 nic_uio_attach(device_t dev)
205 struct nic_uio_softc *sc;
207 sc = device_get_softc(dev);
209 sc->my_cdev = make_dev(&uio_cdevsw, device_get_unit(dev),
210 UID_ROOT, GID_WHEEL, 0600, "uio@pci:%u:%u:%u",
211 pci_get_bus(dev), pci_get_slot(dev), pci_get_function(dev));
212 if (sc->my_cdev == NULL)
214 sc->my_cdev->si_drv1 = sc;
216 for (i = 0; i < MAX_BARS; i++)
217 sc->bar_res[i] = NULL;
219 pci_enable_busmaster(dev);
225 nic_uio_detach(device_t dev)
228 struct nic_uio_softc *sc;
229 sc = device_get_softc(dev);
231 for (i = 0; i < MAX_BARS; i++)
232 if (sc->bar_res[i] != NULL) {
234 if (PCI_BAR_IO(pci_read_config(dev, sc->bar_id[i], 4)))
235 bus_release_resource(dev, SYS_RES_IOPORT, sc->bar_id[i],
238 bus_release_resource(dev, SYS_RES_MEMORY, sc->bar_id[i],
242 if (sc->my_cdev != NULL)
243 destroy_dev(sc->my_cdev);
250 uint32_t bus, device, function;
254 char *token, *remaining;
256 memset(bdf_str, 0, sizeof(bdf_str));
257 TUNABLE_STR_FETCH("hw.nic_uio.bdfs", bdf_str, sizeof(bdf_str));
260 * Users should specify PCI BDFs in the format "b:d:f,b:d:f,b:d:f".
261 * But the code below does not try differentiate between : and ,
262 * and just blindly uses 3 tokens at a time to construct a
263 * bus/device/function tuple.
265 * There is no checking on strtol() return values, but this should
266 * be OK. Worst case is it cannot convert and returns 0. This
267 * could give us a different BDF than intended, but as long as the
268 * PCI device/vendor ID does not match it will not matter.
271 if (remaining == NULL || remaining[0] == '\0')
273 token = strsep(&remaining, ",:");
276 bus = strtol(token, NULL, 10);
277 token = strsep(&remaining, ",:");
280 device = strtol(token, NULL, 10);
281 token = strsep(&remaining, ",:");
284 function = strtol(token, NULL, 10);
286 dev = pci_find_bsf(bus, device, function);
288 for (i = 0; i < NUM_DEVICES; i++)
289 if (pci_get_vendor(dev) == devices[i].vend &&
290 pci_get_device(dev) == devices[i].dev)
301 nic_uio_shutdown(void)
307 nic_uio_modevent(module_t mod, int type, void *arg)