[PATCH] fw/pci: add Q35 S3 support
by Marcel Apfelbaum
Following the i440fx example, save the LPC, SMBUS and PCIEXBAR bdfs
between OS sleeps and use them to re-configure the
corresponding registers.
Signed-off-by: Marcel Apfelbaum <marcel(a)redhat.com>
---
Hi,
The patch was tested with Win7 and Fedora 23 guests.
Any comments are welcomed.
Thanks,
Marcel
src/fw/pciinit.c | 73 +++++++++++++++++++++++++++++++++++++++++++-------------
1 file changed, 56 insertions(+), 17 deletions(-)
diff --git a/src/fw/pciinit.c b/src/fw/pciinit.c
index 5da6cf6..e44bab0 100644
--- a/src/fw/pciinit.c
+++ b/src/fw/pciinit.c
@@ -149,6 +149,22 @@ static void piix_isa_bridge_setup(struct pci_device *pci, void *arg)
dprintf(1, "PIIX3/PIIX4 init: elcr=%02x %02x\n", elcr[0], elcr[1]);
}
+static void mch_isa_lpc_setup(u16 bdf)
+{
+ /* pm io base */
+ pci_config_writel(bdf, ICH9_LPC_PMBASE,
+ acpi_pm_base | ICH9_LPC_PMBASE_RTE);
+
+ /* acpi enable, SCI: IRQ9 000b = irq9*/
+ pci_config_writeb(bdf, ICH9_LPC_ACPI_CTRL, ICH9_LPC_ACPI_CTRL_ACPI_EN);
+
+ /* set root complex register block BAR */
+ pci_config_writel(bdf, ICH9_LPC_RCBA,
+ ICH9_LPC_RCBA_ADDR | ICH9_LPC_RCBA_EN);
+}
+
+static int ICH9LpcBDF = -1;
+
/* ICH9 LPC PCI to ISA bridge */
/* PCI_VENDOR_ID_INTEL && PCI_DEVICE_ID_INTEL_ICH9_LPC */
static void mch_isa_bridge_setup(struct pci_device *dev, void *arg)
@@ -176,16 +192,10 @@ static void mch_isa_bridge_setup(struct pci_device *dev, void *arg)
outb(elcr[1], ICH9_LPC_PORT_ELCR2);
dprintf(1, "Q35 LPC init: elcr=%02x %02x\n", elcr[0], elcr[1]);
- /* pm io base */
- pci_config_writel(bdf, ICH9_LPC_PMBASE,
- acpi_pm_base | ICH9_LPC_PMBASE_RTE);
+ ICH9LpcBDF = bdf;
- /* acpi enable, SCI: IRQ9 000b = irq9*/
- pci_config_writeb(bdf, ICH9_LPC_ACPI_CTRL, ICH9_LPC_ACPI_CTRL_ACPI_EN);
+ mch_isa_lpc_setup(bdf);
- /* set root complex register block BAR */
- pci_config_writel(bdf, ICH9_LPC_RCBA,
- ICH9_LPC_RCBA_ADDR | ICH9_LPC_RCBA_EN);
e820_add(ICH9_LPC_RCBA_ADDR, 16*1024, E820_RESERVED);
acpi_pm1a_cnt = acpi_pm_base + 0x04;
@@ -244,11 +254,8 @@ static void piix4_pm_setup(struct pci_device *pci, void *arg)
pmtimer_setup(acpi_pm_base + 0x08);
}
-/* ICH9 SMBUS */
-/* PCI_VENDOR_ID_INTEL && PCI_DEVICE_ID_INTEL_ICH9_SMBUS */
-static void ich9_smbus_setup(struct pci_device *dev, void *arg)
+static void ich9_smbus_enable(u16 bdf)
{
- u16 bdf = dev->bdf;
/* map smbus into io space */
pci_config_writel(bdf, ICH9_SMB_SMB_BASE,
(acpi_pm_base + 0x100) | PCI_BASE_ADDRESS_SPACE_IO);
@@ -257,6 +264,17 @@ static void ich9_smbus_setup(struct pci_device *dev, void *arg)
pci_config_writeb(bdf, ICH9_SMB_HOSTC, ICH9_SMB_HOSTC_HST_EN);
}
+int ICH9SmbusBDF = -1;
+
+/* ICH9 SMBUS */
+/* PCI_VENDOR_ID_INTEL && PCI_DEVICE_ID_INTEL_ICH9_SMBUS */
+static void ich9_smbus_setup(struct pci_device *dev, void *arg)
+{
+ ICH9SmbusBDF = dev->bdf;
+
+ ich9_smbus_enable(dev->bdf);
+}
+
static const struct pci_device_id pci_device_tbl[] = {
/* PIIX3/PIIX4 PCI to ISA bridge */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0,
@@ -293,6 +311,9 @@ static const struct pci_device_id pci_device_tbl[] = {
PCI_DEVICE_END,
};
+static int MCHMmcfgBDF = -1;
+static void mch_mmconfig_setup(u16 bdf);
+
void pci_resume(void)
{
if (!CONFIG_QEMU) {
@@ -302,6 +323,18 @@ void pci_resume(void)
if (PiixPmBDF >= 0) {
piix4_pm_config_setup(PiixPmBDF);
}
+
+ if (ICH9LpcBDF >= 0) {
+ mch_isa_lpc_setup(ICH9LpcBDF);
+ }
+
+ if (ICH9SmbusBDF >= 0) {
+ ich9_smbus_enable(ICH9SmbusBDF);
+ }
+
+ if(MCHMmcfgBDF >= 0) {
+ mch_mmconfig_setup(MCHMmcfgBDF);
+ }
}
static void pci_bios_init_device(struct pci_device *pci)
@@ -388,18 +421,24 @@ static void i440fx_mem_addr_setup(struct pci_device *dev, void *arg)
pci_slot_get_irq = piix_pci_slot_get_irq;
}
-static void mch_mem_addr_setup(struct pci_device *dev, void *arg)
+static void mch_mmconfig_setup(u16 bdf)
{
u64 addr = Q35_HOST_BRIDGE_PCIEXBAR_ADDR;
- u32 size = Q35_HOST_BRIDGE_PCIEXBAR_SIZE;
-
- /* setup mmconfig */
- u16 bdf = dev->bdf;
u32 upper = addr >> 32;
u32 lower = (addr & 0xffffffff) | Q35_HOST_BRIDGE_PCIEXBAREN;
pci_config_writel(bdf, Q35_HOST_BRIDGE_PCIEXBAR, 0);
pci_config_writel(bdf, Q35_HOST_BRIDGE_PCIEXBAR + 4, upper);
pci_config_writel(bdf, Q35_HOST_BRIDGE_PCIEXBAR, lower);
+}
+
+static void mch_mem_addr_setup(struct pci_device *dev, void *arg)
+{
+ u64 addr = Q35_HOST_BRIDGE_PCIEXBAR_ADDR;
+ u32 size = Q35_HOST_BRIDGE_PCIEXBAR_SIZE;
+
+ /* setup mmconfig */
+ MCHMmcfgBDF = dev->bdf;
+ mch_mmconfig_setup(dev->bdf);
e820_add(addr, size, E820_RESERVED);
/* setup pci i/o window (above mmconfig) */
--
2.4.3
4 years, 1 month
- 3
- 3