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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [rfc 6/8] qemu-xen: pass-through: multi-function PCI in ACPI
This changes the interface beween qemu-xen and the ACPI portion
of hvmlader. As such it breaks compatibility with older
hvmloaders and a companion patch to hvmloader is needed.
There is a subsequent "noise" companion to this change
which changes slot to devfn as appropriate.
Cc: Dexuan Cui <dexuan.cui@xxxxxxxxx>
Cc: Masaki Kanno <kanno.masaki@xxxxxxxxxxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
---
This patch is co-dependent on
"hvmloader: multi-function PCI hot-plug"
Index: ioemu-remote/hw/piix4acpi.c
===================================================================
--- ioemu-remote.orig/hw/piix4acpi.c 2009-04-06 14:56:00.000000000 +1000
+++ ioemu-remote/hw/piix4acpi.c 2009-04-06 15:01:49.000000000 +1000
@@ -56,8 +56,9 @@
/* The bit in GPE0_STS/EN to notify the pci hotplug event */
#define ACPI_PHP_GPE_BIT 3
-typedef struct AcpiDeviceState AcpiDeviceState;
-AcpiDeviceState *acpi_device_table;
+#define NR_PHP_SLOT_REG (NR_PCI_DEVFN/2)
+#define DEVFN_TO_PHP_SLOT_REG(devfn) (devfn >> 1)
+#define PHP_SLOT_REG_TO_DEVFN(reg, hilo) ((reg << 1) | hilo)
typedef struct PCIAcpiState {
PCIDevice dev;
@@ -77,17 +78,46 @@ typedef struct GPEState {
static GPEState gpe_state;
typedef struct PHPSlots {
- uint8_t status[NR_PCI_DEV]; /* Apaptor stats */
- uint8_t plug_evt; /* PHP_EVT_ADD or PHP_EVT_REMOVE
- * PSTA in ASL */
- uint8_t plug_slot; /* Slot number
- * PSTB in ASL */
+ uint8_t status[NR_PHP_SLOT_REG]; /* Apaptor n stats | Adaptor n+1 status */
+ uint8_t plug_evt; /* PHP_EVT_ADD or PHP_EVT_REMOVE
+ * PSTA in ASL */
+ uint8_t plug_slot; /* Slot number
+ * PSTB in ASL */
} PHPSlots;
static PHPSlots php_slots;
int s3_shutdown_flag;
static qemu_irq sci_irq;
+static void php_reg_set(PHPSlots *hotplug_slots, int devfn, uint8_t val)
+{
+ uint8_t *reg = &(hotplug_slots->status[DEVFN_TO_PHP_SLOT_REG(devfn)]);
+
+ /* Value may only use a nibble */
+ val &= 0xf;
+
+ if (devfn & 0x1)
+ *reg = (*reg & 0x0f) | (val << 4);
+ else
+ *reg = (*reg & 0xf0) | val;
+}
+
+
+static uint8_t php_reg_get(PHPSlots *hotplug_slots, int devfn)
+{
+ uint8_t reg = hotplug_slots->status[DEVFN_TO_PHP_SLOT_REG(devfn)];
+ uint8_t val;
+
+ if (devfn & 0x1)
+ val = (reg & 0xf0) >> 4;
+ else
+ val = reg & 0x0f;
+
+ return val;
+}
+
+typedef struct AcpiDeviceState AcpiDeviceState;
+AcpiDeviceState *acpi_device_table;
static void piix4acpi_save(QEMUFile *f, void *opaque)
{
PCIAcpiState *s = opaque;
@@ -225,8 +255,8 @@ static void acpi_dbg_writel(void *opaque
* ACPI_PHP_IO_ADDR + :
* 0 - the hotplug event
* 1 - the slot that has a hotplug event
- * 2 - 1st php slot ctr/sts reg
- * 3 - 2nd php slot ctr/sts reg
+ * 2 - 1st php slot ctr/sts reg|2nd php slot ctr/sts reg
+ * 3 - 3rd php slot ctr/sts reg|4th php slot ctr/sts reg
* ...
*/
static uint32_t acpi_php_readb(void *opaque, uint32_t addr)
@@ -248,7 +278,7 @@ static uint32_t acpi_php_readb(void *opa
val = hotplug_slots->status[num];
}
- fprintf(logfile, "ACPI PCI hotplug: read addr=0x%x, val=0x%x.\n",
+ fprintf(logfile, "ACPI PCI hotplug: read addr=0x%x, val=0x%02x.\n",
addr, val);
return val;
@@ -257,9 +287,9 @@ static uint32_t acpi_php_readb(void *opa
static void acpi_php_writeb(void *opaque, uint32_t addr, uint32_t val)
{
PHPSlots *hotplug_slots = opaque;
- int slot;
+ int devfn, num, func, i;
- fprintf(logfile, "ACPI PCI hotplug: write addr=0x%x, val=0x%x.\n",
+ fprintf(logfile, "ACPI PCI hotplug: write addr=0x%x, val=0x%02x.\n",
addr, val);
switch (addr)
@@ -268,17 +298,39 @@ static void acpi_php_writeb(void *opaque
case ACPI_PHP_IO_ADDR + 1:
break;
default:
- slot = addr - ACPI_PHP_IO_ADDR - 2;
- if ( val == 0x1 ) { /* Eject command */
- /* make _STA of the slot 0 */
- hotplug_slots->status[slot] = 0;
+ num = addr - ACPI_PHP_IO_ADDR - 2;
+ if ( val == 0x01 || val == 0x10 ) { /* Eject command */
+ if ( val == 0x01 )
+ devfn = PHP_SLOT_REG_TO_DEVFN(num, 0);
+ else
+ devfn = PHP_SLOT_REG_TO_DEVFN(num, 1);
+
+ fprintf(logfile, "ACPI PCI hotplug: write devfn=0x%02x.\n",
+ devfn);
+
+ if (hotplug_slots->plug_evt != PHP_EVT_REMOVE ||
+ hotplug_slots->plug_slot != devfn )
+ {
+ fprintf(logfile, "ACPI PCI hotplug: not expecting "
+ "devfn 0x%02x to be removed. Expected event 0x%x "
+ "for devfn 0x%02x\n", devfn,
+ hotplug_slots->plug_evt, hotplug_slots->plug_slot);
+ return;
+ }
/* clear the hotplug event */
hotplug_slots->plug_evt = 0;
- hotplug_slots->plug_slot = 0;
- /* power off the slot */
- power_off_php_devfn(PCI_DEVFN(slot, 0));
+ for ( func = NR_PCI_FUNC - 1; func >= 0; func-- )
+ {
+ i = PCI_DEVFN(PCI_SLOT(devfn), func);
+
+ /* make _STA of the slot 0 */
+ php_reg_set(hotplug_slots, i, 0);
+
+ /* power off the slot */
+ power_off_php_devfn(i);
+ }
/* signal the CP ACPI hot remove done. */
xenstore_record_dm_state("pci-removed");
@@ -290,7 +342,7 @@ static void pcislots_save(QEMUFile* f, v
{
PHPSlots *hotplug_slots = opaque;
int i;
- for ( i = 0; i < NR_PCI_DEV; i++ ) {
+ for ( i = 0; i < NR_PHP_SLOT_REG; i++ ) {
qemu_put_8s( f, &hotplug_slots->status[i]);
}
qemu_put_8s(f, &hotplug_slots->plug_evt);
@@ -303,7 +355,7 @@ static int pcislots_load(QEMUFile* f, vo
int i;
if (version_id != 1)
return -EINVAL;
- for ( i = 0; i < NR_PCI_DEV; i++ ) {
+ for ( i = 0; i < NR_PHP_SLOT_REG; i++ ) {
qemu_get_8s( f, &hotplug_slots->status[i]);
}
qemu_get_8s(f, &hotplug_slots->plug_evt);
@@ -317,15 +369,15 @@ static void php_slots_init(void)
memset(&php_slots, 0, sizeof(PHPSlots));
/* update the pci slot status */
- for ( i = 0; i < NR_PCI_DEV; i++ ) {
+ for ( i = 0; i < NR_PCI_DEVFN; i++ ) {
if ( test_pci_devfn(i) )
- php_slots.status[i] = 0xf;
+ php_reg_set(&php_slots, i, 0xf);
}
/* ACPI PCI hotplug controller */
- register_ioport_read(ACPI_PHP_IO_ADDR, NR_PCI_DEV + 2, 1,
+ register_ioport_read(ACPI_PHP_IO_ADDR, NR_PHP_SLOT_REG + 2, 1,
acpi_php_readb, &php_slots);
- register_ioport_write(ACPI_PHP_IO_ADDR, NR_PCI_DEV + 2, 1,
+ register_ioport_write(ACPI_PHP_IO_ADDR, NR_PHP_SLOT_REG + 2, 1,
acpi_php_writeb, &php_slots);
register_savevm("pcislots", 0, 1, pcislots_save, pcislots_load,
&php_slots);
@@ -489,7 +541,7 @@ void acpi_php_del(int devfn)
/* update the php controller status */
php_slots.plug_evt = PHP_EVT_REMOVE;
- php_slots.plug_slot = slot;
+ php_slots.plug_slot = devfn;
/* generate a SCI interrupt */
acpi_sci_intr(s);
@@ -530,12 +582,12 @@ void acpi_php_add(int devfn)
{
/* update the php controller status */
php_slots.plug_evt = PHP_EVT_ADD;
- php_slots.plug_slot = slot;
-
- /* update the slot status as present */
- php_slots.status[slot] = 0xf;
+ php_slots.plug_slot = devfn;
}
+ /* update the slot status as present */
+ php_reg_set(&php_slots, devfn, 0xf);
+
/* power on the function */
power_on_php_devfn(devfn);
--
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