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MFC r256777-256779,256788:

Add driver for POWER hypervisor interpartition ethernet.

Approved by:	re (glebius)
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1 parent 6fe3b99 commit e5d79eff87107912cdd11a112a074f5b40a6d963 @nwhitehorn nwhitehorn committed Oct 28, 2013
Showing with 502 additions and 0 deletions.
  1. +1 −0 sys/conf/files.powerpc
  2. +1 −0 sys/powerpc/conf/GENERIC64
  3. +2 −0 sys/powerpc/pseries/phyp-hvcall.S
  4. +498 −0 sys/powerpc/pseries/phyp_llan.c
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1 sys/conf/files.powerpc
@@ -228,6 +228,7 @@ powerpc/ps3/ps3-hvcall.S optional ps3 sc
powerpc/pseries/phyp-hvcall.S optional pseries powerpc64
powerpc/pseries/mmu_phyp.c optional pseries powerpc64
powerpc/pseries/phyp_console.c optional pseries powerpc64 uart
+powerpc/pseries/phyp_llan.c optional llan
powerpc/pseries/phyp_vscsi.c optional pseries powerpc64 scbus
powerpc/pseries/platform_chrp.c optional pseries
powerpc/pseries/plpar_iommu.c optional pseries powerpc64
View
1 sys/powerpc/conf/GENERIC64
@@ -128,6 +128,7 @@ device em # Intel PRO/1000 Gigabit Ethernet Family
device igb # Intel PRO/1000 PCIE Server Gigabit Family
device ixgbe # Intel PRO/10GbE PCIE Ethernet Family
device glc # Sony Playstation 3 Ethernet
+device llan # IBM pSeries Virtual Ethernet
# PCI Ethernet NICs that use the common MII bus controller code.
device miibus # MII bus support
View
2 sys/powerpc/pseries/phyp-hvcall.S
@@ -36,6 +36,8 @@
ASENTRY(phyp_hcall)
mflr %r0
std %r0,16(%r1)
+ ld %r11,112(%r1) /* Last couple args into volatile regs*/
+ ld %r12,120(%r1)
hc /* invoke the hypervisor */
ld %r0,16(%r1)
mtlr %r0
View
498 sys/powerpc/pseries/phyp_llan.c
@@ -0,0 +1,498 @@
+/*-
+ * Copyright 2013 Nathan Whitehorn
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sockio.h>
+#include <sys/endian.h>
+#include <sys/mbuf.h>
+#include <sys/module.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+#include <sys/socket.h>
+
+#include <net/bpf.h>
+#include <net/if.h>
+#include <net/if_arp.h>
+#include <net/ethernet.h>
+#include <net/if_dl.h>
+#include <net/if_media.h>
+#include <net/if_types.h>
+#include <net/if_vlan_var.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+
+#include <powerpc/pseries/phyp-hvcall.h>
+
+#define LLAN_MAX_RX_PACKETS 100
+#define LLAN_MAX_TX_PACKETS 100
+#define LLAN_RX_BUF_LEN 8*PAGE_SIZE
+
+#define LLAN_BUFDESC_VALID (1ULL << 63)
+#define LLAN_ADD_MULTICAST 0x1
+#define LLAN_DEL_MULTICAST 0x2
+#define LLAN_CLEAR_MULTICAST 0x3
+
+struct llan_xfer {
+ struct mbuf *rx_mbuf;
+ bus_dmamap_t rx_dmamap;
+ uint64_t rx_bufdesc;
+};
+
+struct llan_receive_queue_entry { /* PAPR page 539 */
+ uint8_t control;
+ uint8_t reserved;
+ uint16_t offset;
+ uint32_t length;
+ uint64_t handle;
+} __packed;
+
+struct llan_softc {
+ device_t dev;
+ struct mtx io_lock;
+
+ cell_t unit;
+ uint8_t mac_address[8];
+
+ int irqid;
+ struct resource *irq;
+ void *irq_cookie;
+
+ bus_dma_tag_t rx_dma_tag;
+ bus_dma_tag_t rxbuf_dma_tag;
+ bus_dma_tag_t tx_dma_tag;
+
+ bus_dmamap_t tx_dma_map;
+
+ struct llan_receive_queue_entry *rx_buf;
+ int rx_dma_slot;
+ int rx_valid_val;
+ bus_dmamap_t rx_buf_map;
+ bus_addr_t rx_buf_phys;
+ bus_size_t rx_buf_len;
+ bus_addr_t input_buf_phys;
+ bus_addr_t filter_buf_phys;
+ struct llan_xfer rx_xfer[LLAN_MAX_RX_PACKETS];
+
+ struct ifnet *ifp;
+};
+
+static int llan_probe(device_t);
+static int llan_attach(device_t);
+static void llan_intr(void *xsc);
+static void llan_init(void *xsc);
+static void llan_start(struct ifnet *ifp);
+static int llan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
+static void llan_rx_load_cb(void *xsc, bus_dma_segment_t *segs, int nsegs,
+ int err);
+static int llan_add_rxbuf(struct llan_softc *sc, struct llan_xfer *rx);
+static int llan_set_multicast(struct llan_softc *sc);
+
+static devclass_t llan_devclass;
+static device_method_t llan_methods[] = {
+ DEVMETHOD(device_probe, llan_probe),
+ DEVMETHOD(device_attach, llan_attach),
+
+ DEVMETHOD_END
+};
+static driver_t llan_driver = {
+ "llan",
+ llan_methods,
+ sizeof(struct llan_softc)
+};
+DRIVER_MODULE(llan, vdevice, llan_driver, llan_devclass, 0, 0);
+
+static int
+llan_probe(device_t dev)
+{
+ if (!ofw_bus_is_compatible(dev,"IBM,l-lan"))
+ return (ENXIO);
+
+ device_set_desc(dev, "POWER Hypervisor Virtual Ethernet");
+ return (0);
+}
+
+static int
+llan_attach(device_t dev)
+{
+ struct llan_softc *sc;
+ phandle_t node;
+ int error, i;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+
+ /* Get firmware properties */
+ node = ofw_bus_get_node(dev);
+ OF_getprop(node, "local-mac-address", sc->mac_address,
+ sizeof(sc->mac_address));
+ OF_getprop(node, "reg", &sc->unit, sizeof(sc->unit));
+
+ mtx_init(&sc->io_lock, "llan", NULL, MTX_DEF);
+
+ /* Setup interrupt */
+ sc->irqid = 0;
+ sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irqid,
+ RF_ACTIVE);
+
+ if (!sc->irq) {
+ device_printf(dev, "Could not allocate IRQ\n");
+ mtx_destroy(&sc->io_lock);
+ return (ENXIO);
+ }
+
+ bus_setup_intr(dev, sc->irq, INTR_TYPE_MISC | INTR_MPSAFE |
+ INTR_ENTROPY, NULL, llan_intr, sc, &sc->irq_cookie);
+
+ /* Setup DMA */
+ error = bus_dma_tag_create(bus_get_dma_tag(dev), 16, 0,
+ BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
+ LLAN_RX_BUF_LEN, 1, BUS_SPACE_MAXSIZE_32BIT,
+ 0, NULL, NULL, &sc->rx_dma_tag);
+ error = bus_dma_tag_create(bus_get_dma_tag(dev), 4, 0,
+ BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
+ BUS_SPACE_MAXSIZE, 1, BUS_SPACE_MAXSIZE_32BIT,
+ 0, NULL, NULL, &sc->rxbuf_dma_tag);
+ error = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
+ BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
+ BUS_SPACE_MAXSIZE, 6, BUS_SPACE_MAXSIZE_32BIT, 0,
+ busdma_lock_mutex, &sc->io_lock, &sc->tx_dma_tag);
+
+ error = bus_dmamem_alloc(sc->rx_dma_tag, (void **)&sc->rx_buf,
+ BUS_DMA_WAITOK | BUS_DMA_ZERO, &sc->rx_buf_map);
+ error = bus_dmamap_load(sc->rx_dma_tag, sc->rx_buf_map, sc->rx_buf,
+ LLAN_RX_BUF_LEN, llan_rx_load_cb, sc, 0);
+
+ /* TX DMA maps */
+ bus_dmamap_create(sc->tx_dma_tag, 0, &sc->tx_dma_map);
+
+ /* RX DMA */
+ for (i = 0; i < LLAN_MAX_RX_PACKETS; i++) {
+ error = bus_dmamap_create(sc->rxbuf_dma_tag, 0,
+ &sc->rx_xfer[i].rx_dmamap);
+ sc->rx_xfer[i].rx_mbuf = NULL;
+ }
+
+ /* Attach to network stack */
+ sc->ifp = if_alloc(IFT_ETHER);
+ sc->ifp->if_softc = sc;
+
+ if_initname(sc->ifp, device_get_name(dev), device_get_unit(dev));
+ sc->ifp->if_mtu = ETHERMTU; /* XXX max-frame-size from OF? */
+ sc->ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
+ sc->ifp->if_hwassist = 0; /* XXX: ibm,illan-options */
+ sc->ifp->if_capabilities = 0;
+ sc->ifp->if_capenable = 0;
+ sc->ifp->if_start = llan_start;
+ sc->ifp->if_ioctl = llan_ioctl;
+ sc->ifp->if_init = llan_init;
+
+ IFQ_SET_MAXLEN(&sc->ifp->if_snd, LLAN_MAX_TX_PACKETS);
+ sc->ifp->if_snd.ifq_drv_maxlen = LLAN_MAX_TX_PACKETS;
+ IFQ_SET_READY(&sc->ifp->if_snd);
+
+ ether_ifattach(sc->ifp, &sc->mac_address[2]);
+
+ return (0);
+}
+
+static void
+llan_rx_load_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int err)
+{
+ struct llan_softc *sc = xsc;
+
+ sc->rx_buf_phys = segs[0].ds_addr;
+ sc->rx_buf_len = segs[0].ds_len - 2*PAGE_SIZE;
+ sc->input_buf_phys = segs[0].ds_addr + segs[0].ds_len - PAGE_SIZE;
+ sc->filter_buf_phys = segs[0].ds_addr + segs[0].ds_len - 2*PAGE_SIZE;
+}
+
+static void
+llan_init(void *xsc)
+{
+ struct llan_softc *sc = xsc;
+ uint64_t rx_buf_desc;
+ uint64_t macaddr;
+ int err, i;
+
+ mtx_lock(&sc->io_lock);
+
+ phyp_hcall(H_FREE_LOGICAL_LAN, sc->unit);
+
+ /* Create buffers (page 539) */
+ sc->rx_dma_slot = 0;
+ sc->rx_valid_val = 1;
+
+ rx_buf_desc = LLAN_BUFDESC_VALID;
+ rx_buf_desc |= (sc->rx_buf_len << 32);
+ rx_buf_desc |= sc->rx_buf_phys;
+ memcpy(&macaddr, sc->mac_address, 8);
+ err = phyp_hcall(H_REGISTER_LOGICAL_LAN, sc->unit, sc->input_buf_phys,
+ rx_buf_desc, sc->filter_buf_phys, macaddr);
+
+ for (i = 0; i < LLAN_MAX_RX_PACKETS; i++)
+ llan_add_rxbuf(sc, &sc->rx_xfer[i]);
+
+ phyp_hcall(H_VIO_SIGNAL, sc->unit, 1); /* Enable interrupts */
+
+ /* Tell stack we're up */
+ sc->ifp->if_drv_flags |= IFF_DRV_RUNNING;
+ sc->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
+
+ mtx_unlock(&sc->io_lock);
+}
+
+static int
+llan_add_rxbuf(struct llan_softc *sc, struct llan_xfer *rx)
+{
+ struct mbuf *m;
+ bus_dma_segment_t segs[1];
+ int error, nsegs;
+
+ mtx_assert(&sc->io_lock, MA_OWNED);
+
+ m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
+ if (m == NULL)
+ return (ENOBUFS);
+
+ m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
+ if (rx->rx_mbuf != NULL) {
+ bus_dmamap_sync(sc->rxbuf_dma_tag, rx->rx_dmamap,
+ BUS_DMASYNC_POSTREAD);
+ bus_dmamap_unload(sc->rxbuf_dma_tag, rx->rx_dmamap);
+ }
+
+ /* Save pointer to buffer structure */
+ m_copyback(m, 0, 8, (void *)&rx);
+
+ error = bus_dmamap_load_mbuf_sg(sc->rxbuf_dma_tag, rx->rx_dmamap, m,
+ segs, &nsegs, BUS_DMA_NOWAIT);
+ if (error != 0) {
+ device_printf(sc->dev,
+ "cannot load RX DMA map %p, error = %d\n", rx, error);
+ m_freem(m);
+ return (error);
+ }
+
+ /* If nsegs is wrong then the stack is corrupt. */
+ KASSERT(nsegs == 1,
+ ("%s: too many DMA segments (%d)", __func__, nsegs));
+ rx->rx_mbuf = m;
+
+ bus_dmamap_sync(sc->rxbuf_dma_tag, rx->rx_dmamap, BUS_DMASYNC_PREREAD);
+
+ rx->rx_bufdesc = LLAN_BUFDESC_VALID;
+ rx->rx_bufdesc |= (((uint64_t)segs[0].ds_len) << 32);
+ rx->rx_bufdesc |= segs[0].ds_addr;
+ error = phyp_hcall(H_ADD_LOGICAL_LAN_BUFFER, sc->unit, rx->rx_bufdesc);
+ if (error != 0) {
+ m_freem(m);
+ rx->rx_mbuf = NULL;
+ return (ENOBUFS);
+ }
+
+ return (0);
+}
+
+static void
+llan_intr(void *xsc)
+{
+ struct llan_softc *sc = xsc;
+ struct llan_xfer *rx;
+ struct mbuf *m;
+
+ mtx_lock(&sc->io_lock);
+ phyp_hcall(H_VIO_SIGNAL, sc->unit, 0);
+
+ while ((sc->rx_buf[sc->rx_dma_slot].control >> 7) == sc->rx_valid_val) {
+ rx = (struct llan_xfer *)sc->rx_buf[sc->rx_dma_slot].handle;
+ m = rx->rx_mbuf;
+ m_adj(m, sc->rx_buf[sc->rx_dma_slot].offset - 8);
+ m->m_len = sc->rx_buf[sc->rx_dma_slot].length;
+
+ /* llan_add_rxbuf does DMA sync and unload as well as requeue */
+ if (llan_add_rxbuf(sc, rx) != 0) {
+ sc->ifp->if_ierrors++;
+ phyp_hcall(H_ADD_LOGICAL_LAN_BUFFER, sc->unit,
+ rx->rx_bufdesc);
+ continue;
+ }
+
+ sc->ifp->if_ipackets++;
+ m_adj(m, sc->rx_buf[sc->rx_dma_slot].offset);
+ m->m_len = sc->rx_buf[sc->rx_dma_slot].length;
+ m->m_pkthdr.rcvif = sc->ifp;
+ m->m_pkthdr.len = m->m_len;
+ sc->rx_dma_slot++;
+
+ if (sc->rx_dma_slot >= sc->rx_buf_len/sizeof(sc->rx_buf[0])) {
+ sc->rx_dma_slot = 0;
+ sc->rx_valid_val = !sc->rx_valid_val;
+ }
+
+ mtx_unlock(&sc->io_lock);
+ (*sc->ifp->if_input)(sc->ifp, m);
+ mtx_lock(&sc->io_lock);
+ }
+
+ phyp_hcall(H_VIO_SIGNAL, sc->unit, 1);
+ mtx_unlock(&sc->io_lock);
+}
+
+static void
+llan_send_packet(void *xsc, bus_dma_segment_t *segs, int nsegs,
+ bus_size_t mapsize, int error)
+{
+ struct llan_softc *sc = xsc;
+ uint64_t bufdescs[6];
+ int i;
+
+ bzero(bufdescs, sizeof(bufdescs));
+
+ for (i = 0; i < nsegs; i++) {
+ bufdescs[i] = LLAN_BUFDESC_VALID;
+ bufdescs[i] |= (((uint64_t)segs[i].ds_len) << 32);
+ bufdescs[i] |= segs[i].ds_addr;
+ }
+
+ phyp_hcall(H_SEND_LOGICAL_LAN, sc->unit, bufdescs[0],
+ bufdescs[1], bufdescs[2], bufdescs[3], bufdescs[4], bufdescs[5], 0);
+ /*
+ * The hypercall returning implies completion -- or that the call will
+ * not complete. In principle, we should try a few times if we get back
+ * H_BUSY based on the continuation token in R4. For now, just drop
+ * the packet in such cases.
+ */
+}
+
+static void
+llan_start_locked(struct ifnet *ifp)
+{
+ struct llan_softc *sc = ifp->if_softc;
+ bus_addr_t first;
+ int nsegs;
+ struct mbuf *mb_head, *m;
+
+ mtx_assert(&sc->io_lock, MA_OWNED);
+ first = 0;
+
+ if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
+ IFF_DRV_RUNNING)
+ return;
+
+ while (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) {
+ IFQ_DRV_DEQUEUE(&ifp->if_snd, mb_head);
+
+ if (mb_head == NULL)
+ break;
+
+ BPF_MTAP(ifp, mb_head);
+
+ for (m = mb_head, nsegs = 0; m != NULL; m = m->m_next)
+ nsegs++;
+ if (nsegs > 6) {
+ m = m_collapse(mb_head, M_NOWAIT, 6);
+ if (m == NULL) {
+ m_freem(mb_head);
+ continue;
+ }
+ }
+
+ bus_dmamap_load_mbuf(sc->tx_dma_tag, sc->tx_dma_map,
+ mb_head, llan_send_packet, sc, 0);
+ bus_dmamap_unload(sc->tx_dma_tag, sc->tx_dma_map);
+ m_freem(mb_head);
+ }
+}
+
+static void
+llan_start(struct ifnet *ifp)
+{
+ struct llan_softc *sc = ifp->if_softc;
+
+ mtx_lock(&sc->io_lock);
+ llan_start_locked(ifp);
+ mtx_unlock(&sc->io_lock);
+}
+
+static int
+llan_set_multicast(struct llan_softc *sc)
+{
+ struct ifnet *ifp = sc->ifp;
+ struct ifmultiaddr *inm;
+ uint64_t macaddr;
+
+ mtx_assert(&sc->io_lock, MA_OWNED);
+
+ phyp_hcall(H_MULTICAST_CTRL, sc->unit, LLAN_CLEAR_MULTICAST, 0);
+
+ if_maddr_rlock(ifp);
+ TAILQ_FOREACH(inm, &ifp->if_multiaddrs, ifma_link) {
+ if (inm->ifma_addr->sa_family != AF_LINK)
+ continue;
+
+ memcpy((uint8_t *)&macaddr + 2,
+ LLADDR((struct sockaddr_dl *)inm->ifma_addr), 6);
+ phyp_hcall(H_MULTICAST_CTRL, sc->unit, LLAN_ADD_MULTICAST,
+ macaddr);
+ }
+ if_maddr_runlock(ifp);
+
+ return (0);
+}
+
+static int
+llan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
+{
+ int err = 0;
+ struct llan_softc *sc = ifp->if_softc;
+
+ switch (cmd) {
+ case SIOCADDMULTI:
+ case SIOCDELMULTI:
+ mtx_lock(&sc->io_lock);
+ if ((sc->ifp->if_drv_flags & IFF_DRV_RUNNING) != 0)
+ llan_set_multicast(sc);
+ mtx_unlock(&sc->io_lock);
+ break;
+ case SIOCSIFFLAGS:
+ default:
+ err = ether_ioctl(ifp, cmd, data);
+ break;
+ }
+
+ return (err);
+}
+

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