[Qemu-devel] [PATCH v2 11/34] test/qgraph: e1000e driver and interface nodes

[Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>]

Add qgraph nodes for virtio-e1000e.
It consumes a pci-bus, and it's directly used by tests
(e1000e is pci based).

Signed-off-by: Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
---
 tests/Makefile.include |   1 +
 tests/libqos/e1000e.c  | 262 +++++++++++++++++++++++++++++++++++++++++
 tests/libqos/e1000e.h  |  53 +++++++++
 3 files changed, 316 insertions(+)
 create mode 100644 tests/libqos/e1000e.c
 create mode 100644 tests/libqos/e1000e.h

diff --git a/tests/Makefile.include b/tests/Makefile.include
index b86aa52546..66d6270ace 100644
--- a/tests/Makefile.include
+++ b/tests/Makefile.include
@@ -775,6 +775,7 @@ libqgraph-machines-obj-y += tests/libqos/ppc64_pseries-machine.o
 libqgraph-pci-obj-y = $(libqos-pc-obj-y) $(libqos-spapr-obj-y)
 libqgraph-pci-obj-y += $(libqgraph-machines-obj-y)
 libqgraph-pci-obj-y += tests/libqos/sdhci.o
+libqgraph-pci-obj-y += tests/libqos/e1000e.o
 
 libqgraph-tests-obj-y = $(libqgraph-pci-obj-y)
 libqgraph-tests-obj-y += tests/sdhci-test.o
diff --git a/tests/libqos/e1000e.c b/tests/libqos/e1000e.c
new file mode 100644
index 0000000000..8aec82e7c2
--- /dev/null
+++ b/tests/libqos/e1000e.c
@@ -0,0 +1,262 @@
+/*
+ * libqos driver framework
+ *
+ * Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest.h"
+#include "qemu-common.h"
+#include "libqos/pci-pc.h"
+#include "qemu/sockets.h"
+#include "qemu/iov.h"
+#include "qemu/bitops.h"
+#include "libqos/malloc.h"
+#include "libqos/malloc-pc.h"
+#include "libqos/malloc-generic.h"
+#include "libqos/qgraph.h"
+#include "e1000e.h"
+
+#define E1000E_IMS      (0x00d0)
+
+#define E1000E_STATUS   (0x0008)
+#define E1000E_STATUS_LU BIT(1)
+#define E1000E_STATUS_ASDV1000 BIT(9)
+
+#define E1000E_CTRL     (0x0000)
+#define E1000E_CTRL_RESET BIT(26)
+
+#define E1000E_RCTL     (0x0100)
+#define E1000E_RCTL_EN  BIT(1)
+#define E1000E_RCTL_UPE BIT(3)
+#define E1000E_RCTL_MPE BIT(4)
+
+#define E1000E_RFCTL     (0x5008)
+#define E1000E_RFCTL_EXTEN  BIT(15)
+
+#define E1000E_TCTL     (0x0400)
+#define E1000E_TCTL_EN  BIT(1)
+
+#define E1000E_CTRL_EXT             (0x0018)
+#define E1000E_CTRL_EXT_DRV_LOAD    BIT(28)
+#define E1000E_CTRL_EXT_TXLSFLOW    BIT(22)
+
+#define E1000E_IVAR                 (0x00E4)
+#define E1000E_IVAR_TEST_CFG        ((E1000E_RX0_MSG_ID << 0)    | BIT(3)  | \
+                                     (E1000E_TX0_MSG_ID << 8)    | BIT(11) | \
+                                     (E1000E_OTHER_MSG_ID << 16) | BIT(19) | \
+                                     BIT(31))
+
+#define E1000E_RING_LEN             (0x1000)
+
+#define E1000E_TDBAL    (0x3800)
+
+#define E1000E_TDBAH    (0x3804)
+#define E1000E_TDH      (0x3810)
+
+#define E1000E_RDBAL    (0x2800)
+#define E1000E_RDBAH    (0x2804)
+#define E1000E_RDH      (0x2810)
+
+#define E1000E_TXD_LEN              (16)
+#define E1000E_RXD_LEN              (16)
+
+static void e1000e_macreg_write(QE1000E *d, uint32_t reg, uint32_t val)
+{
+    QE1000E_PCI *d_pci = container_of(d, QE1000E_PCI, e1000e);
+    qpci_io_writel(&d_pci->pci_dev, d_pci->mac_regs, reg, val);
+}
+
+static uint32_t e1000e_macreg_read(QE1000E *d, uint32_t reg)
+{
+    QE1000E_PCI *d_pci = container_of(d, QE1000E_PCI, e1000e);
+    return qpci_io_readl(&d_pci->pci_dev, d_pci->mac_regs, reg);
+}
+
+void e1000e_tx_ring_push(QE1000E *d, void *descr)
+{
+    uint32_t tail = e1000e_macreg_read(d, E1000E_TDT);
+    uint32_t len = e1000e_macreg_read(d, E1000E_TDLEN) / E1000E_TXD_LEN;
+
+    memwrite(d->tx_ring + tail * E1000E_TXD_LEN, descr, E1000E_TXD_LEN);
+    e1000e_macreg_write(d, E1000E_TDT, (tail + 1) % len);
+
+    /* Read WB data for the packet transmitted */
+    memread(d->tx_ring + tail * E1000E_TXD_LEN, descr, E1000E_TXD_LEN);
+}
+
+void e1000e_rx_ring_push(QE1000E *d, void *descr)
+{
+    uint32_t tail = e1000e_macreg_read(d, E1000E_RDT);
+    uint32_t len = e1000e_macreg_read(d, E1000E_RDLEN) / E1000E_RXD_LEN;
+
+    memwrite(d->rx_ring + tail * E1000E_RXD_LEN, descr, E1000E_RXD_LEN);
+    e1000e_macreg_write(d, E1000E_RDT, (tail + 1) % len);
+
+    /* Read WB data for the packet received */
+    memread(d->rx_ring + tail * E1000E_RXD_LEN, descr, E1000E_RXD_LEN);
+}
+
+static void e1000e_foreach_callback(QPCIDevice *dev, int devfn, void *data)
+{
+    QPCIDevice *res = data;
+    memcpy(res, dev, sizeof(QPCIDevice));
+}
+
+void e1000e_wait_isr(QE1000E *d, uint16_t msg_id)
+{
+    QE1000E_PCI *d_pci = container_of(d, QE1000E_PCI, e1000e);
+    guint64 end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
+
+    do {
+        if (qpci_msix_pending(&d_pci->pci_dev, msg_id)) {
+            return;
+        }
+        clock_step(10000);
+    } while (g_get_monotonic_time() < end_time);
+
+    g_error("Timeout expired");
+}
+
+static void e1000e_pci_destroy(QOSGraphObject *obj)
+{
+    QE1000E_PCI *epci = (QE1000E_PCI *) obj;
+    qpci_iounmap(&epci->pci_dev, epci->mac_regs);
+    qpci_msix_disable(&epci->pci_dev);
+    g_free(epci);
+}
+
+static void e1000e_pci_start_hw(QOSGraphObject *obj)
+{
+    QE1000E_PCI *d = (QE1000E_PCI *) obj;
+    uint32_t val;
+
+    /* Enable the device */
+    qpci_device_enable(&d->pci_dev);
+
+    /* Reset the device */
+    val = e1000e_macreg_read(&d->e1000e, E1000E_CTRL);
+    e1000e_macreg_write(&d->e1000e, E1000E_CTRL, val | E1000E_CTRL_RESET);
+
+    /* Enable and configure MSI-X */
+    qpci_msix_enable(&d->pci_dev);
+    e1000e_macreg_write(&d->e1000e, E1000E_IVAR, E1000E_IVAR_TEST_CFG);
+
+    /* Check the device status - link and speed */
+    val = e1000e_macreg_read(&d->e1000e, E1000E_STATUS);
+    g_assert_cmphex(val & (E1000E_STATUS_LU | E1000E_STATUS_ASDV1000),
+        ==, E1000E_STATUS_LU | E1000E_STATUS_ASDV1000);
+
+    /* Initialize TX/RX logic */
+    e1000e_macreg_write(&d->e1000e, E1000E_RCTL, 0);
+    e1000e_macreg_write(&d->e1000e, E1000E_TCTL, 0);
+
+    /* Notify the device that the driver is ready */
+    val = e1000e_macreg_read(&d->e1000e, E1000E_CTRL_EXT);
+    e1000e_macreg_write(&d->e1000e, E1000E_CTRL_EXT,
+        val | E1000E_CTRL_EXT_DRV_LOAD | E1000E_CTRL_EXT_TXLSFLOW);
+
+    e1000e_macreg_write(&d->e1000e, E1000E_TDBAL,
+                           (uint32_t) d->e1000e.tx_ring);
+    e1000e_macreg_write(&d->e1000e, E1000E_TDBAH,
+                           (uint32_t) (d->e1000e.tx_ring >> 32));
+    e1000e_macreg_write(&d->e1000e, E1000E_TDLEN, E1000E_RING_LEN);
+    e1000e_macreg_write(&d->e1000e, E1000E_TDT, 0);
+    e1000e_macreg_write(&d->e1000e, E1000E_TDH, 0);
+
+    /* Enable transmit */
+    e1000e_macreg_write(&d->e1000e, E1000E_TCTL, E1000E_TCTL_EN);
+    e1000e_macreg_write(&d->e1000e, E1000E_RDBAL,
+                           (uint32_t)d->e1000e.rx_ring);
+    e1000e_macreg_write(&d->e1000e, E1000E_RDBAH,
+                           (uint32_t)(d->e1000e.rx_ring >> 32));
+    e1000e_macreg_write(&d->e1000e, E1000E_RDLEN, E1000E_RING_LEN);
+    e1000e_macreg_write(&d->e1000e, E1000E_RDT, 0);
+    e1000e_macreg_write(&d->e1000e, E1000E_RDH, 0);
+
+    /* Enable receive */
+    e1000e_macreg_write(&d->e1000e, E1000E_RFCTL, E1000E_RFCTL_EXTEN);
+    e1000e_macreg_write(&d->e1000e, E1000E_RCTL, E1000E_RCTL_EN  |
+                                        E1000E_RCTL_UPE |
+                                        E1000E_RCTL_MPE);
+
+    /* Enable all interrupts */
+    e1000e_macreg_write(&d->e1000e, E1000E_IMS, 0xFFFFFFFF);
+
+}
+
+static void *e1000e_pci_get_driver(void *obj, const char *interface)
+{
+    QE1000E_PCI *epci = obj;
+    if (!g_strcmp0(interface, "e1000e-if")) {
+        return &epci->e1000e;
+    }
+
+    /* implicit contains */
+    if (!g_strcmp0(interface, "pci-device")) {
+        return &epci->pci_dev;
+    }
+
+    printf("%s not present in e1000e\n", interface);
+    abort();
+}
+
+static void *e1000e_pci_create(void *pci_bus, QGuestAllocator *alloc,
+                               void *addr)
+{
+    QE1000E_PCI *d = g_new0(QE1000E_PCI, 1);
+    QPCIBus *bus = pci_bus;
+    QPCIAddress *address = addr;
+
+    qpci_device_foreach(bus, address->vendor_id, address->device_id,
+                        e1000e_foreach_callback, &d->pci_dev);
+
+    /* Map BAR0 (mac registers) */
+    d->mac_regs = qpci_iomap(&d->pci_dev, 0, NULL);
+
+    /* Allocate and setup TX ring */
+    d->e1000e.tx_ring = guest_alloc(alloc, E1000E_RING_LEN);
+    g_assert(d->e1000e.tx_ring != 0);
+
+    /* Allocate and setup RX ring */
+    d->e1000e.rx_ring = guest_alloc(alloc, E1000E_RING_LEN);
+    g_assert(d->e1000e.rx_ring != 0);
+
+    d->obj.get_driver = e1000e_pci_get_driver;
+    d->obj.start_hw = e1000e_pci_start_hw;
+    d->obj.destructor = e1000e_pci_destroy;
+
+    return &d->obj;
+}
+
+static void e1000e(void)
+{
+    QPCIAddress addr = {
+        .vendor_id = 0x8086,
+        .device_id = 0x10D3,
+    };
+
+    /* FIXME: every test using this node needs to setup a -netdev socket,id=hs0
+     * otherwise QEMU is not going to start */
+    QOSGraphEdgeOptions opts = {
+        .extra_device_opts = "netdev=hs0",
+    };
+    add_qpci_address(&opts, &addr);
+
+    qos_node_create_driver("e1000e", e1000e_pci_create);
+    qos_node_consumes("e1000e", "pci-bus", &opts);
+}
+
+libqos_init(e1000e);
diff --git a/tests/libqos/e1000e.h b/tests/libqos/e1000e.h
new file mode 100644
index 0000000000..9d37094f43
--- /dev/null
+++ b/tests/libqos/e1000e.h
@@ -0,0 +1,53 @@
+/*
+ * libqos driver framework
+ *
+ * Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+
+#ifndef QGRAPH_E1000E
+#define QGRAPH_E1000E
+
+#include "libqos/qgraph.h"
+#include "pci.h"
+
+#define E1000E_RX0_MSG_ID           (0)
+#define E1000E_TX0_MSG_ID           (1)
+#define E1000E_OTHER_MSG_ID         (2)
+
+#define E1000E_TDLEN    (0x3808)
+#define E1000E_TDT      (0x3818)
+#define E1000E_RDLEN    (0x2808)
+#define E1000E_RDT      (0x2818)
+
+typedef struct QE1000E QE1000E;
+typedef struct QE1000E_PCI QE1000E_PCI;
+
+struct QE1000E {
+    uint64_t tx_ring;
+    uint64_t rx_ring;
+};
+
+struct QE1000E_PCI {
+    QOSGraphObject obj;
+    QPCIDevice pci_dev;
+    QPCIBar mac_regs;
+    QE1000E e1000e;
+};
+
+void e1000e_wait_isr(QE1000E *d, uint16_t msg_id);
+void e1000e_tx_ring_push(QE1000E *d, void *descr);
+void e1000e_rx_ring_push(QE1000E *d, void *descr);
+
+#endif
-- 
2.17.1