tests/libqos/e1000e.c

   1 /*
   2  * libqos driver framework
   3  *
   4  * Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License version 2 as published by the Free Software Foundation.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  17  */
  18
  19 #include "qemu/osdep.h"
  20 #include "libqtest.h"
  21 #include "libqos/pci-pc.h"
  22 #include "qemu/sockets.h"
  23 #include "qemu/iov.h"
  24 #include "qemu/module.h"
  25 #include "qemu/bitops.h"
  26 #include "libqos/malloc.h"
  27 #include "libqos/qgraph.h"
  28 #include "e1000e.h"
  29
  30 #define E1000E_IMS      (0x00d0)
  31
  32 #define E1000E_STATUS   (0x0008)
  33 #define E1000E_STATUS_LU BIT(1)
  34 #define E1000E_STATUS_ASDV1000 BIT(9)
  35
  36 #define E1000E_CTRL     (0x0000)
  37 #define E1000E_CTRL_RESET BIT(26)
  38
  39 #define E1000E_RCTL     (0x0100)
  40 #define E1000E_RCTL_EN  BIT(1)
  41 #define E1000E_RCTL_UPE BIT(3)
  42 #define E1000E_RCTL_MPE BIT(4)
  43
  44 #define E1000E_RFCTL     (0x5008)
  45 #define E1000E_RFCTL_EXTEN  BIT(15)
  46
  47 #define E1000E_TCTL     (0x0400)
  48 #define E1000E_TCTL_EN  BIT(1)
  49
  50 #define E1000E_CTRL_EXT             (0x0018)
  51 #define E1000E_CTRL_EXT_DRV_LOAD    BIT(28)
  52 #define E1000E_CTRL_EXT_TXLSFLOW    BIT(22)
  53
  54 #define E1000E_IVAR                 (0x00E4)
  55 #define E1000E_IVAR_TEST_CFG        ((E1000E_RX0_MSG_ID << 0)    | BIT(3)  | \
  56                                      (E1000E_TX0_MSG_ID << 8)    | BIT(11) | \
  57                                      (E1000E_OTHER_MSG_ID << 16) | BIT(19) | \
  58                                      BIT(31))
  59
  60 #define E1000E_RING_LEN             (0x1000)
  61
  62 #define E1000E_TDBAL    (0x3800)
  63
  64 #define E1000E_TDBAH    (0x3804)
  65 #define E1000E_TDH      (0x3810)
  66
  67 #define E1000E_RDBAL    (0x2800)
  68 #define E1000E_RDBAH    (0x2804)
  69 #define E1000E_RDH      (0x2810)
  70
  71 #define E1000E_TXD_LEN              (16)
  72 #define E1000E_RXD_LEN              (16)
  73
  74 static void e1000e_macreg_write(QE1000E *d, uint32_t reg, uint32_t val)
  75 {
  76     QE1000E_PCI *d_pci = container_of(d, QE1000E_PCI, e1000e);
  77     qpci_io_writel(&d_pci->pci_dev, d_pci->mac_regs, reg, val);
  78 }
  79
  80 static uint32_t e1000e_macreg_read(QE1000E *d, uint32_t reg)
  81 {
  82     QE1000E_PCI *d_pci = container_of(d, QE1000E_PCI, e1000e);
  83     return qpci_io_readl(&d_pci->pci_dev, d_pci->mac_regs, reg);
  84 }
  85
  86 void e1000e_tx_ring_push(QE1000E *d, void *descr)
  87 {
  88     uint32_t tail = e1000e_macreg_read(d, E1000E_TDT);
  89     uint32_t len = e1000e_macreg_read(d, E1000E_TDLEN) / E1000E_TXD_LEN;
  90
  91     memwrite(d->tx_ring + tail * E1000E_TXD_LEN, descr, E1000E_TXD_LEN);
  92     e1000e_macreg_write(d, E1000E_TDT, (tail + 1) % len);
  93
  94     /* Read WB data for the packet transmitted */
  95     memread(d->tx_ring + tail * E1000E_TXD_LEN, descr, E1000E_TXD_LEN);
  96 }
  97
  98 void e1000e_rx_ring_push(QE1000E *d, void *descr)
  99 {
 100     uint32_t tail = e1000e_macreg_read(d, E1000E_RDT);
 101     uint32_t len = e1000e_macreg_read(d, E1000E_RDLEN) / E1000E_RXD_LEN;
 102
 103     memwrite(d->rx_ring + tail * E1000E_RXD_LEN, descr, E1000E_RXD_LEN);
 104     e1000e_macreg_write(d, E1000E_RDT, (tail + 1) % len);
 105
 106     /* Read WB data for the packet received */
 107     memread(d->rx_ring + tail * E1000E_RXD_LEN, descr, E1000E_RXD_LEN);
 108 }
 109
 110 static void e1000e_foreach_callback(QPCIDevice *dev, int devfn, void *data)
 111 {
 112     QPCIDevice *res = data;
 113     memcpy(res, dev, sizeof(QPCIDevice));
 114     g_free(dev);
 115 }
 116
 117 void e1000e_wait_isr(QE1000E *d, uint16_t msg_id)
 118 {
 119     QE1000E_PCI *d_pci = container_of(d, QE1000E_PCI, e1000e);
 120     guint64 end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 121
 122     do {
 123         if (qpci_msix_pending(&d_pci->pci_dev, msg_id)) {
 124             return;
 125         }
 126         clock_step(10000);
 127     } while (g_get_monotonic_time() < end_time);
 128
 129     g_error("Timeout expired");
 130 }
 131
 132 static void e1000e_pci_destructor(QOSGraphObject *obj)
 133 {
 134     QE1000E_PCI *epci = (QE1000E_PCI *) obj;
 135     qpci_iounmap(&epci->pci_dev, epci->mac_regs);
 136     qpci_msix_disable(&epci->pci_dev);
 137 }
 138
 139 static void e1000e_pci_start_hw(QOSGraphObject *obj)
 140 {
 141     QE1000E_PCI *d = (QE1000E_PCI *) obj;
 142     uint32_t val;
 143
 144     /* Enable the device */
 145     qpci_device_enable(&d->pci_dev);
 146
 147     /* Reset the device */
 148     val = e1000e_macreg_read(&d->e1000e, E1000E_CTRL);
 149     e1000e_macreg_write(&d->e1000e, E1000E_CTRL, val | E1000E_CTRL_RESET);
 150
 151     /* Enable and configure MSI-X */
 152     qpci_msix_enable(&d->pci_dev);
 153     e1000e_macreg_write(&d->e1000e, E1000E_IVAR, E1000E_IVAR_TEST_CFG);
 154
 155     /* Check the device status - link and speed */
 156     val = e1000e_macreg_read(&d->e1000e, E1000E_STATUS);
 157     g_assert_cmphex(val & (E1000E_STATUS_LU | E1000E_STATUS_ASDV1000),
 158         ==, E1000E_STATUS_LU | E1000E_STATUS_ASDV1000);
 159
 160     /* Initialize TX/RX logic */
 161     e1000e_macreg_write(&d->e1000e, E1000E_RCTL, 0);
 162     e1000e_macreg_write(&d->e1000e, E1000E_TCTL, 0);
 163
 164     /* Notify the device that the driver is ready */
 165     val = e1000e_macreg_read(&d->e1000e, E1000E_CTRL_EXT);
 166     e1000e_macreg_write(&d->e1000e, E1000E_CTRL_EXT,
 167         val | E1000E_CTRL_EXT_DRV_LOAD | E1000E_CTRL_EXT_TXLSFLOW);
 168
 169     e1000e_macreg_write(&d->e1000e, E1000E_TDBAL,
 170                            (uint32_t) d->e1000e.tx_ring);
 171     e1000e_macreg_write(&d->e1000e, E1000E_TDBAH,
 172                            (uint32_t) (d->e1000e.tx_ring >> 32));
 173     e1000e_macreg_write(&d->e1000e, E1000E_TDLEN, E1000E_RING_LEN);
 174     e1000e_macreg_write(&d->e1000e, E1000E_TDT, 0);
 175     e1000e_macreg_write(&d->e1000e, E1000E_TDH, 0);
 176
 177     /* Enable transmit */
 178     e1000e_macreg_write(&d->e1000e, E1000E_TCTL, E1000E_TCTL_EN);
 179     e1000e_macreg_write(&d->e1000e, E1000E_RDBAL,
 180                            (uint32_t)d->e1000e.rx_ring);
 181     e1000e_macreg_write(&d->e1000e, E1000E_RDBAH,
 182                            (uint32_t)(d->e1000e.rx_ring >> 32));
 183     e1000e_macreg_write(&d->e1000e, E1000E_RDLEN, E1000E_RING_LEN);
 184     e1000e_macreg_write(&d->e1000e, E1000E_RDT, 0);
 185     e1000e_macreg_write(&d->e1000e, E1000E_RDH, 0);
 186
 187     /* Enable receive */
 188     e1000e_macreg_write(&d->e1000e, E1000E_RFCTL, E1000E_RFCTL_EXTEN);
 189     e1000e_macreg_write(&d->e1000e, E1000E_RCTL, E1000E_RCTL_EN  |
 190                                         E1000E_RCTL_UPE |
 191                                         E1000E_RCTL_MPE);
 192
 193     /* Enable all interrupts */
 194     e1000e_macreg_write(&d->e1000e, E1000E_IMS, 0xFFFFFFFF);
 195
 196 }
 197
 198 static void *e1000e_pci_get_driver(void *obj, const char *interface)
 199 {
 200     QE1000E_PCI *epci = obj;
 201     if (!g_strcmp0(interface, "e1000e-if")) {
 202         return &epci->e1000e;
 203     }
 204
 205     /* implicit contains */
 206     if (!g_strcmp0(interface, "pci-device")) {
 207         return &epci->pci_dev;
 208     }
 209
 210     fprintf(stderr, "%s not present in e1000e\n", interface);
 211     g_assert_not_reached();
 212 }
 213
 214 static void *e1000e_pci_create(void *pci_bus, QGuestAllocator *alloc,
 215                                void *addr)
 216 {
 217     QE1000E_PCI *d = g_new0(QE1000E_PCI, 1);
 218     QPCIBus *bus = pci_bus;
 219     QPCIAddress *address = addr;
 220
 221     qpci_device_foreach(bus, address->vendor_id, address->device_id,
 222                         e1000e_foreach_callback, &d->pci_dev);
 223
 224     /* Map BAR0 (mac registers) */
 225     d->mac_regs = qpci_iomap(&d->pci_dev, 0, NULL);
 226
 227     /* Allocate and setup TX ring */
 228     d->e1000e.tx_ring = guest_alloc(alloc, E1000E_RING_LEN);
 229     g_assert(d->e1000e.tx_ring != 0);
 230
 231     /* Allocate and setup RX ring */
 232     d->e1000e.rx_ring = guest_alloc(alloc, E1000E_RING_LEN);
 233     g_assert(d->e1000e.rx_ring != 0);
 234
 235     d->obj.get_driver = e1000e_pci_get_driver;
 236     d->obj.start_hw = e1000e_pci_start_hw;
 237     d->obj.destructor = e1000e_pci_destructor;
 238
 239     return &d->obj;
 240 }
 241
 242 static void e1000e_register_nodes(void)
 243 {
 244     QPCIAddress addr = {
 245         .vendor_id = 0x8086,
 246         .device_id = 0x10D3,
 247     };
 248
 249     /* FIXME: every test using this node needs to setup a -netdev socket,id=hs0
 250      * otherwise QEMU is not going to start */
 251     QOSGraphEdgeOptions opts = {
 252         .extra_device_opts = "netdev=hs0",
 253     };
 254     add_qpci_address(&opts, &addr);
 255
 256     qos_node_create_driver("e1000e", e1000e_pci_create);
 257     qos_node_consumes("e1000e", "pci-bus", &opts);
 258 }
 259
 260 libqos_init(e1000e_register_nodes);