diff mbox

[v4,1/3] e1000: allow command-line selection of card model

Message ID 1401716009-7005-2-git-send-email-somlo@cmu.edu
State New
Headers show

Commit Message

Gabriel L. Somlo June 2, 2014, 1:33 p.m. UTC 
Allow selection of different card models from the qemu
command line, to better accomodate a wider range of guests.

Signed-off-by: Romain Dolbeau <romain@dolbeau.org>
Signed-off-by: Gabriel Somlo <somlo@cmu.edu>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
---
 hw/net/e1000.c      | 120 +++++++++++++++++++++++++++++++++++++++++-----------
 hw/net/e1000_regs.h |   6 +++
 2 files changed, 102 insertions(+), 24 deletions(-)

Comments

Gabriel L. Somlo June 2, 2014, 4:17 p.m. UTC | #1 
I was looking over my submission, and have one remaining question:

On Mon, Jun 02, 2014 at 09:33:27AM -0400, Gabriel L. Somlo wrote:
> Allow selection of different card models from the qemu
> command line, to better accomodate a wider range of guests.
> 
> Signed-off-by: Romain Dolbeau <romain@dolbeau.org>
> Signed-off-by: Gabriel Somlo <somlo@cmu.edu>
> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
> ---
>  hw/net/e1000.c      | 120 +++++++++++++++++++++++++++++++++++++++++-----------
>  hw/net/e1000_regs.h |   6 +++
>  2 files changed, 102 insertions(+), 24 deletions(-)
> 
> diff --git a/hw/net/e1000.c b/hw/net/e1000.c
> index 8387443..1c51be8 100644
> --- a/hw/net/e1000.c
> +++ b/hw/net/e1000.c
>
> [...]
>
> @@ -385,6 +390,7 @@ static void e1000_reset(void *opaque)
>      d->mit_ide = 0;
>      memset(d->phy_reg, 0, sizeof d->phy_reg);
>      memmove(d->phy_reg, phy_reg_init, sizeof phy_reg_init);
> +    d->phy_reg[PHY_ID2] = edc->phy_id2;

Should this instead be "cpu_to_le16(edc->phy_id2)" ?

>      memset(d->mac_reg, 0, sizeof d->mac_reg);
>      memmove(d->mac_reg, mac_reg_init, sizeof mac_reg_init);
>      d->rxbuf_min_shift = 1;
> @@ -1440,9 +1446,13 @@ static const VMStateDescription vmstate_e1000 = {
>
>[...]
>
> @@ -1531,6 +1542,7 @@ static int pci_e1000_init(PCIDevice *pci_dev)
>      macaddr = d->conf.macaddr.a;
>      for (i = 0; i < 3; i++)
>          d->eeprom_data[i] = (macaddr[2*i+1]<<8) | macaddr[2*i];
> +    d->eeprom_data[11] = d->eeprom_data[13] = pdc->device_id;

Same here, use "cpu_to_le16()" ?

If "Yes", then how about the "phy_reg_init[]" table ? It's an array
of uint16_t's with a bunch of statically defined elements, but gets
memove()'d in place during e1000_reset in cpu format, which may not be
appropriate if the host is a big-endian machine.

I'm primarily concerned about the correctness of my own patch set here,
but wondering if e1000.c might need additional work (e.g.  phy_reg_init[]
and friends) ? :)

Thanks much,
--Gabriel
Stefan Hajnoczi June 3, 2014, 8:36 a.m. UTC | #2 
On Mon, Jun 02, 2014 at 12:17:48PM -0400, Gabriel L. Somlo wrote:
> I was looking over my submission, and have one remaining question:
> 
> On Mon, Jun 02, 2014 at 09:33:27AM -0400, Gabriel L. Somlo wrote:
> > Allow selection of different card models from the qemu
> > command line, to better accomodate a wider range of guests.
> > 
> > Signed-off-by: Romain Dolbeau <romain@dolbeau.org>
> > Signed-off-by: Gabriel Somlo <somlo@cmu.edu>
> > Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
> > Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
> > ---
> >  hw/net/e1000.c      | 120 +++++++++++++++++++++++++++++++++++++++++-----------
> >  hw/net/e1000_regs.h |   6 +++
> >  2 files changed, 102 insertions(+), 24 deletions(-)
> > 
> > diff --git a/hw/net/e1000.c b/hw/net/e1000.c
> > index 8387443..1c51be8 100644
> > --- a/hw/net/e1000.c
> > +++ b/hw/net/e1000.c
> >
> > [...]
> >
> > @@ -385,6 +390,7 @@ static void e1000_reset(void *opaque)
> >      d->mit_ide = 0;
> >      memset(d->phy_reg, 0, sizeof d->phy_reg);
> >      memmove(d->phy_reg, phy_reg_init, sizeof phy_reg_init);
> > +    d->phy_reg[PHY_ID2] = edc->phy_id2;
> 
> Should this instead be "cpu_to_le16(edc->phy_id2)" ?

No, ->phy_reg[] is in host endian.

> >      memset(d->mac_reg, 0, sizeof d->mac_reg);
> >      memmove(d->mac_reg, mac_reg_init, sizeof mac_reg_init);
> >      d->rxbuf_min_shift = 1;
> > @@ -1440,9 +1446,13 @@ static const VMStateDescription vmstate_e1000 = {
> >
> >[...]
> >
> > @@ -1531,6 +1542,7 @@ static int pci_e1000_init(PCIDevice *pci_dev)
> >      macaddr = d->conf.macaddr.a;
> >      for (i = 0; i < 3; i++)
> >          d->eeprom_data[i] = (macaddr[2*i+1]<<8) | macaddr[2*i];
> > +    d->eeprom_data[11] = d->eeprom_data[13] = pdc->device_id;
> 
> Same here, use "cpu_to_le16()" ?

No, ->eeprom_data[] is in host endian.

> I'm primarily concerned about the correctness of my own patch set here,
> but wondering if e1000.c might need additional work (e.g.  phy_reg_init[]
> and friends) ? :)

The hardware register accesses go through QEMU MemoryRegion.  The memory
regions are marked DEVICE_LITTLE_ENDIAN so the QEMU core device
emulation code handles the byteswapping for us (if necessary).  The
e1000 code itself operates in host endian.

The exception to this are the guest-memory DMA structures like the
descriptor rings.  Here we need to byteswap since we're reading/writing
guest memory ourselves.  Since your patch doesn't touch this you
shouldn't need to worry.

Stefan
diff mbox

Patch

diff --git a/hw/net/e1000.c b/hw/net/e1000.c
index 8387443..1c51be8 100644
--- a/hw/net/e1000.c
+++ b/hw/net/e1000.c
@@ -69,23 +69,13 @@  static int debugflags = DBGBIT(TXERR) | DBGBIT(GENERAL);
 
 /*
  * HW models:
- *  E1000_DEV_ID_82540EM works with Windows and Linux
+ *  E1000_DEV_ID_82540EM works with Windows, Linux, and OS X <= 10.8
  *  E1000_DEV_ID_82573L OK with windoze and Linux 2.6.22,
  *	appears to perform better than 82540EM, but breaks with Linux 2.6.18
  *  E1000_DEV_ID_82544GC_COPPER appears to work; not well tested
+ *  E1000_DEV_ID_82545EM_COPPER works with Linux and OS X >= 10.6
  *  Others never tested
  */
-enum { E1000_DEVID = E1000_DEV_ID_82540EM };
-
-/*
- * May need to specify additional MAC-to-PHY entries --
- * Intel's Windows driver refuses to initialize unless they match
- */
-enum {
-    PHY_ID2_INIT = E1000_DEVID == E1000_DEV_ID_82573L ?		0xcc2 :
-                   E1000_DEVID == E1000_DEV_ID_82544GC_COPPER ?	0xc30 :
-                   /* default to E1000_DEV_ID_82540EM */	0xc20
-};
 
 typedef struct E1000State_st {
     /*< private >*/
@@ -151,10 +141,21 @@  typedef struct E1000State_st {
     uint32_t compat_flags;
 } E1000State;
 
-#define TYPE_E1000 "e1000"
+typedef struct E1000BaseClass {
+    PCIDeviceClass parent_class;
+    uint16_t phy_id2;
+    bool is_8257xx;
+} E1000BaseClass;
+
+#define TYPE_E1000_BASE "e1000-base"
 
 #define E1000(obj) \
-    OBJECT_CHECK(E1000State, (obj), TYPE_E1000)
+    OBJECT_CHECK(E1000State, (obj), TYPE_E1000_BASE)
+
+#define E1000_DEVICE_CLASS(klass) \
+     OBJECT_CLASS_CHECK(E1000BaseClass, (klass), TYPE_E1000_BASE)
+#define E1000_DEVICE_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(E1000BaseClass, (obj), TYPE_E1000_BASE)
 
 #define	defreg(x)	x = (E1000_##x>>2)
 enum {
@@ -232,10 +233,11 @@  static const char phy_regcap[0x20] = {
     [PHY_ID2] = PHY_R,		[M88E1000_PHY_SPEC_STATUS] = PHY_R
 };
 
+/* PHY_ID2 documented in 8254x_GBe_SDM.pdf, pp. 250 */
 static const uint16_t phy_reg_init[] = {
     [PHY_CTRL] = 0x1140,
     [PHY_STATUS] = 0x794d, /* link initially up with not completed autoneg */
-    [PHY_ID1] = 0x141,				[PHY_ID2] = PHY_ID2_INIT,
+    [PHY_ID1] = 0x141, /* [PHY_ID2] configured per DevId, from e1000_reset() */
     [PHY_1000T_CTRL] = 0x0e00,			[M88E1000_PHY_SPEC_CTRL] = 0x360,
     [M88E1000_EXT_PHY_SPEC_CTRL] = 0x0d60,	[PHY_AUTONEG_ADV] = 0xde1,
     [PHY_LP_ABILITY] = 0x1e0,			[PHY_1000T_STATUS] = 0x3c00,
@@ -269,13 +271,15 @@  static void
 set_interrupt_cause(E1000State *s, int index, uint32_t val)
 {
     PCIDevice *d = PCI_DEVICE(s);
+    E1000BaseClass *edc = E1000_DEVICE_GET_CLASS(d);
     uint32_t pending_ints;
     uint32_t mit_delay;
 
-    if (val && (E1000_DEVID >= E1000_DEV_ID_82547EI_MOBILE)) {
-        /* Only for 8257x */
+    if (val && edc->is_8257xx) {
+        /* hack only for 8257xx models */
         val |= E1000_ICR_INT_ASSERTED;
     }
+
     s->mac_reg[ICR] = val;
 
     /*
@@ -375,6 +379,7 @@  rxbufsize(uint32_t v)
 static void e1000_reset(void *opaque)
 {
     E1000State *d = opaque;
+    E1000BaseClass *edc = E1000_DEVICE_GET_CLASS(d);
     uint8_t *macaddr = d->conf.macaddr.a;
     int i;
 
@@ -385,6 +390,7 @@  static void e1000_reset(void *opaque)
     d->mit_ide = 0;
     memset(d->phy_reg, 0, sizeof d->phy_reg);
     memmove(d->phy_reg, phy_reg_init, sizeof phy_reg_init);
+    d->phy_reg[PHY_ID2] = edc->phy_id2;
     memset(d->mac_reg, 0, sizeof d->mac_reg);
     memmove(d->mac_reg, mac_reg_init, sizeof mac_reg_init);
     d->rxbuf_min_shift = 1;
@@ -1440,9 +1446,13 @@  static const VMStateDescription vmstate_e1000 = {
     }
 };
 
+/*
+ * EEPROM contents documented in Tables 5-2 and 5-3, pp. 98-102.
+ * Note: A valid DevId will be inserted during pci_e1000_init().
+ */
 static const uint16_t e1000_eeprom_template[64] = {
     0x0000, 0x0000, 0x0000, 0x0000,      0xffff, 0x0000,      0x0000, 0x0000,
-    0x3000, 0x1000, 0x6403, E1000_DEVID, 0x8086, E1000_DEVID, 0x8086, 0x3040,
+    0x3000, 0x1000, 0x6403, 0 /*DevId*/, 0x8086, 0 /*DevId*/, 0x8086, 0x3040,
     0x0008, 0x2000, 0x7e14, 0x0048,      0x1000, 0x00d8,      0x0000, 0x2700,
     0x6cc9, 0x3150, 0x0722, 0x040b,      0x0984, 0x0000,      0xc000, 0x0706,
     0x1008, 0x0000, 0x0f04, 0x7fff,      0x4d01, 0xffff,      0xffff, 0xffff,
@@ -1507,6 +1517,7 @@  static int pci_e1000_init(PCIDevice *pci_dev)
 {
     DeviceState *dev = DEVICE(pci_dev);
     E1000State *d = E1000(pci_dev);
+    PCIDeviceClass *pdc = PCI_DEVICE_GET_CLASS(pci_dev);
     uint8_t *pci_conf;
     uint16_t checksum = 0;
     int i;
@@ -1531,6 +1542,7 @@  static int pci_e1000_init(PCIDevice *pci_dev)
     macaddr = d->conf.macaddr.a;
     for (i = 0; i < 3; i++)
         d->eeprom_data[i] = (macaddr[2*i+1]<<8) | macaddr[2*i];
+    d->eeprom_data[11] = d->eeprom_data[13] = pdc->device_id;
     for (i = 0; i < EEPROM_CHECKSUM_REG; i++)
         checksum += d->eeprom_data[i];
     checksum = (uint16_t) EEPROM_SUM - checksum;
@@ -1564,17 +1576,29 @@  static Property e1000_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+typedef struct E1000Info {
+    const char *name;
+    uint16_t   device_id;
+    uint8_t    revision;
+    uint16_t   phy_id2;
+    bool       is_8257xx;
+} E1000Info;
+
 static void e1000_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+    E1000BaseClass *e = E1000_DEVICE_CLASS(klass);
+    const E1000Info *info = data;
 
     k->init = pci_e1000_init;
     k->exit = pci_e1000_uninit;
     k->romfile = "efi-e1000.rom";
     k->vendor_id = PCI_VENDOR_ID_INTEL;
-    k->device_id = E1000_DEVID;
-    k->revision = 0x03;
+    k->device_id = info->device_id;
+    k->revision = info->revision;
+    e->phy_id2 = info->phy_id2;
+    e->is_8257xx = info->is_8257xx;
     k->class_id = PCI_CLASS_NETWORK_ETHERNET;
     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
     dc->desc = "Intel Gigabit Ethernet";
@@ -1583,16 +1607,64 @@  static void e1000_class_init(ObjectClass *klass, void *data)
     dc->props = e1000_properties;
 }
 
-static const TypeInfo e1000_info = {
-    .name          = TYPE_E1000,
+static const TypeInfo e1000_base_info = {
+    .name          = TYPE_E1000_BASE,
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(E1000State),
-    .class_init    = e1000_class_init,
+    .class_size    = sizeof(E1000BaseClass),
+    .abstract      = true,
+};
+
+static const E1000Info e1000_devices[] = {
+    {
+        .name      = "e1000-82540em",
+        .device_id = E1000_DEV_ID_82540EM,
+        .revision  = 0x03,
+        .phy_id2   = E1000_PHY_ID2_8254xx_DEFAULT,
+    },
+    {
+        .name      = "e1000-82544gc",
+        .device_id = E1000_DEV_ID_82544GC_COPPER,
+        .revision  = 0x03,
+        .phy_id2   = E1000_PHY_ID2_82544x,
+    },
+    {
+        .name      = "e1000-82545em",
+        .device_id = E1000_DEV_ID_82545EM_COPPER,
+        .revision  = 0x03,
+        .phy_id2   = E1000_PHY_ID2_8254xx_DEFAULT,
+    },
+    {
+        .name      = "e1000-82573l",
+        .device_id = E1000_DEV_ID_82573L,
+        .revision  = 0x03,
+        .phy_id2   = E1000_PHY_ID2_82573x,
+        .is_8257xx = true,
+    },
+};
+
+static const TypeInfo e1000_default_info = {
+    .name          = "e1000",
+    .parent        = "e1000-82540em",
 };
 
 static void e1000_register_types(void)
 {
-    type_register_static(&e1000_info);
+    int i;
+
+    type_register_static(&e1000_base_info);
+    for (i = 0; i < ARRAY_SIZE(e1000_devices); i++) {
+        const E1000Info *info = &e1000_devices[i];
+        TypeInfo type_info = {};
+
+        type_info.name = info->name;
+        type_info.parent = TYPE_E1000_BASE;
+        type_info.class_data = (void *)info;
+        type_info.class_init = e1000_class_init;
+
+        type_register(&type_info);
+    }
+    type_register_static(&e1000_default_info);
 }
 
 type_init(e1000_register_types)
diff --git a/hw/net/e1000_regs.h b/hw/net/e1000_regs.h
index c9cb79e..13ac671 100644
--- a/hw/net/e1000_regs.h
+++ b/hw/net/e1000_regs.h
@@ -99,6 +99,12 @@ 
 #define E1000_DEV_ID_ICH8_IFE_G          0x10C5
 #define E1000_DEV_ID_ICH8_IGP_M          0x104D
 
+/* Device Specific Register Defaults */
+#define E1000_PHY_ID2_82541x 0x380
+#define E1000_PHY_ID2_82544x 0xC30
+#define E1000_PHY_ID2_8254xx_DEFAULT 0xC20 /* 82540x, 82545x, and 82546x */
+#define E1000_PHY_ID2_82573x 0xCC0
+
 /* Register Set. (82543, 82544)
  *
  * Registers are defined to be 32 bits and  should be accessed as 32 bit values.