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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH V5 10/10] Introduce Xen PCI Passthrough, MSI (3/3)
From: Jiang Yunhong <yunhong.jiang@xxxxxxxxx>
A more complete history can be found here:
git://xenbits.xensource.com/qemu-xen-unstable.git
Signed-off-by: Jiang Yunhong <yunhong.jiang@xxxxxxxxx>
Signed-off-by: Shan Haitao <haitao.shan@xxxxxxxxx>
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
Makefile.target | 1 +
hw/apic-msidef.h | 2 +
hw/xen_pci_passthrough.c | 60 +++-
hw/xen_pci_passthrough.h | 55 +++
hw/xen_pci_passthrough_config_init.c | 505 +++++++++++++++++++++++++-
hw/xen_pci_passthrough_msi.c | 678 ++++++++++++++++++++++++++++++++++
6 files changed, 1294 insertions(+), 7 deletions(-)
create mode 100644 hw/xen_pci_passthrough_msi.c
diff --git a/Makefile.target b/Makefile.target
index 33435a3..81cff70 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -223,6 +223,7 @@ obj-i386-$(CONFIG_XEN) += xen_platform.o
obj-i386-$(CONFIG_XEN_PCI_PASSTHROUGH) += host-pci-device.o
obj-i386-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pci_passthrough.o
obj-i386-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pci_passthrough_config_init.o
+obj-i386-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pci_passthrough_msi.o
# Inter-VM PCI shared memory
CONFIG_IVSHMEM =
diff --git a/hw/apic-msidef.h b/hw/apic-msidef.h
index 3182f0b..6e2eb71 100644
--- a/hw/apic-msidef.h
+++ b/hw/apic-msidef.h
@@ -22,6 +22,8 @@
#define MSI_ADDR_DEST_MODE_SHIFT 2
+#define MSI_ADDR_REDIRECTION_SHIFT 3
+
#define MSI_ADDR_DEST_ID_SHIFT 12
#define MSI_ADDR_DEST_ID_MASK 0x00ffff0
diff --git a/hw/xen_pci_passthrough.c b/hw/xen_pci_passthrough.c
index c816ed5..cd7e3c7 100644
--- a/hw/xen_pci_passthrough.c
+++ b/hw/xen_pci_passthrough.c
@@ -38,6 +38,39 @@
* Write '1'
* <ptdev->msi_trans_en is false>
* - Set real bit to '1'.
+ *
+ * MSI-INTx translation.
+ * Initialize(xc_physdev_map_pirq_msi/pt_msi_setup)
+ * Bind MSI-INTx(xc_domain_bind_pt_irq)
+ * <fail>
+ * - Unmap MSI.
+ * <success>
+ * - Set dev->msi->pirq to '-1'.
+ * <fail>
+ * - Do nothing.
+ *
+ * Write to Interrupt Disable bit by guest software(pt_cmd_reg_write)
+ * Write '0'
+ * <ptdev->msi_trans_en is true>
+ * - Set MSI Enable bit to '1'.
+ *
+ * Write '1'
+ * <ptdev->msi_trans_en is true>
+ * - Set MSI Enable bit to '0'.
+ *
+ * MSI interrupt:
+ * Initialize MSI register(pt_msi_setup, pt_msi_update)
+ * Bind MSI(xc_domain_update_msi_irq)
+ * <fail>
+ * - Unmap MSI.
+ * - Set dev->msi->pirq to '-1'.
+ *
+ * MSI-X interrupt:
+ * Initialize MSI-X register(pt_msix_update_one)
+ * Bind MSI-X(xc_domain_update_msi_irq)
+ * <fail>
+ * - Unmap MSI-X.
+ * - Set entry->pirq to '-1'.
*/
#include <sys/ioctl.h>
@@ -389,6 +422,7 @@ static void pt_iomem_map(XenPCIPassthroughState *s, int i,
}
if (!first_map && old_ebase != PT_PCI_BAR_UNMAPPED) {
+ pt_add_msix_mapping(s, i);
/* Remove old mapping */
memory_region_del_subregion(r->address_space,
r->memory);
@@ -417,6 +451,15 @@ static void pt_iomem_map(XenPCIPassthroughState *s, int i,
if (ret != 0) {
PT_ERR(&s->dev, "create new mapping failed!\n");
}
+
+ ret = pt_remove_msix_mapping(s, i);
+ if (ret != 0) {
+ PT_ERR(&s->dev, "Remove MSI-X MMIO mapping failed!\n");
+ }
+
+ if (old_ebase != e_phys && old_ebase != -1) {
+ pt_msix_update_remap(s, i);
+ }
}
}
@@ -744,6 +787,9 @@ static int pt_initfn(PCIDevice *pcidev)
mapped_machine_irq[machine_irq]++;
}
+ /* setup MSI-INTx translation if support */
+ rc = pt_enable_msi_translate(s);
+
/* bind machine_irq to device */
if (rc < 0 && machine_irq != 0) {
uint8_t e_device = PCI_SLOT(s->dev.devfn);
@@ -773,7 +819,8 @@ static int pt_initfn(PCIDevice *pcidev)
out:
PT_LOG(pcidev, "Real physical device %02x:%02x.%x registered successfuly!"
- "\nIRQ type = %s\n", bus, slot, func, "INTx");
+ "\nIRQ type = %s\n", bus, slot, func,
+ s->msi_trans_en ? "MSI-INTx" : "INTx");
return 0;
}
@@ -790,7 +837,7 @@ static int pt_unregister_device(PCIDevice *pcidev)
e_intx = pci_intx(s);
machine_irq = s->machine_irq;
- if (machine_irq) {
+ if (s->msi_trans_en == 0 && machine_irq) {
rc = xc_domain_unbind_pt_irq(xen_xc, xen_domid, machine_irq,
PT_IRQ_TYPE_PCI, 0, e_device, e_intx, 0);
if (rc < 0) {
@@ -798,6 +845,13 @@ static int pt_unregister_device(PCIDevice *pcidev)
}
}
+ if (s->msi) {
+ pt_msi_disable(s);
+ }
+ if (s->msix) {
+ pt_msix_disable(s);
+ }
+
if (machine_irq) {
mapped_machine_irq[machine_irq]--;
@@ -832,6 +886,8 @@ static PCIDeviceInfo xen_pci_passthrough = {
.is_express = 0,
.qdev.props = (Property[]) {
DEFINE_PROP_STRING("hostaddr", XenPCIPassthroughState, hostaddr),
+ DEFINE_PROP_BIT("msitranslate", XenPCIPassthroughState, msi_trans_cap,
+ 0, true),
DEFINE_PROP_BIT("power-mgmt", XenPCIPassthroughState, power_mgmt,
0, false),
DEFINE_PROP_END_OF_LIST(),
diff --git a/hw/xen_pci_passthrough.h b/hw/xen_pci_passthrough.h
index 110325c..acbbab5 100644
--- a/hw/xen_pci_passthrough.h
+++ b/hw/xen_pci_passthrough.h
@@ -74,6 +74,10 @@ typedef int (*conf_byte_restore)
#define PT_PCI_BAR_UNMAPPED (-1)
#define PT_UNASSIGNED_PIRQ (-1)
+/* MSI-X */
+#define PT_MSI_FLAG_UNINIT 0x1000
+#define PT_MSI_FLAG_MAPPED 0x2000
+
typedef enum {
GRP_TYPE_HARDWIRED = 0, /* 0 Hardwired reg group */
@@ -177,6 +181,34 @@ typedef struct XenPTRegGroup {
} XenPTRegGroup;
+typedef struct XenPTMSI {
+ uint32_t flags;
+ uint32_t ctrl_offset; /* saved control offset */
+ int pirq; /* guest pirq corresponding */
+ uint32_t addr_lo; /* guest message address */
+ uint32_t addr_hi; /* guest message upper address */
+ uint16_t data; /* guest message data */
+} XenPTMSI;
+
+typedef struct XenMSIXEntry {
+ int pirq; /* -1 means unmapped */
+ int flags; /* flags indicting whether MSI ADDR or DATA is updated */
+ uint32_t io_mem[4];
+} XenMSIXEntry;
+typedef struct XenPTMSIX {
+ uint32_t ctrl_offset;
+ int enabled;
+ int total_entries;
+ int bar_index;
+ uint64_t table_base;
+ uint32_t table_off;
+ uint32_t table_offset_adjust; /* page align mmap */
+ uint64_t mmio_base_addr;
+ int mmio_index;
+ void *phys_iomem_base;
+ XenMSIXEntry msix_entry[0];
+} XenPTMSIX;
+
typedef struct XenPTPM {
QEMUTimer *pm_timer; /* QEMUTimer struct */
int no_soft_reset; /* No Soft Reset flags */
@@ -200,6 +232,13 @@ struct XenPCIPassthroughState {
uint32_t machine_irq;
+ XenPTMSI *msi;
+ XenPTMSIX *msix;
+
+ /* Physical MSI to guest INTx translation when possible */
+ uint32_t msi_trans_cap;
+ bool msi_trans_en;
+
uint32_t power_mgmt;
XenPTPM *pm_state;
@@ -279,4 +318,20 @@ static inline uint8_t pci_intx(XenPCIPassthroughState *s)
return r_val;
}
+/* MSI/MSI-X */
+void pt_msi_set_enable(XenPCIPassthroughState *s, int en);
+int pt_msi_setup(XenPCIPassthroughState *s);
+int pt_msi_update(XenPCIPassthroughState *d);
+void pt_msi_disable(XenPCIPassthroughState *s);
+int pt_enable_msi_translate(XenPCIPassthroughState *s);
+void pt_disable_msi_translate(XenPCIPassthroughState *s);
+
+int pt_msix_init(XenPCIPassthroughState *s, int pos);
+void pt_msix_delete(XenPCIPassthroughState *s);
+int pt_msix_update(XenPCIPassthroughState *s);
+int pt_msix_update_remap(XenPCIPassthroughState *s, int bar_index);
+void pt_msix_disable(XenPCIPassthroughState *s);
+int pt_add_msix_mapping(XenPCIPassthroughState *s, int bar_index);
+int pt_remove_msix_mapping(XenPCIPassthroughState *s, int bar_index);
+
#endif /* !QEMU_HW_XEN_PCI_PASSTHROUGH_H */
diff --git a/hw/xen_pci_passthrough_config_init.c
b/hw/xen_pci_passthrough_config_init.c
index ae64544..28523f1 100644
--- a/hw/xen_pci_passthrough_config_init.c
+++ b/hw/xen_pci_passthrough_config_init.c
@@ -398,11 +398,19 @@ static int pt_cmd_reg_write(XenPCIPassthroughState *s,
XenPTReg *cfg_entry,
throughable_mask = ~emu_mask & valid_mask;
if (*value & PCI_COMMAND_INTX_DISABLE) {
- throughable_mask |= PCI_COMMAND_INTX_DISABLE;
- } else {
- if (s->machine_irq) {
+ if (s->msi_trans_en) {
+ pt_msi_set_enable(s, 0);
+ } else {
throughable_mask |= PCI_COMMAND_INTX_DISABLE;
}
+ } else {
+ if (s->msi_trans_en) {
+ pt_msi_set_enable(s, 1);
+ } else {
+ if (s->machine_irq) {
+ throughable_mask |= PCI_COMMAND_INTX_DISABLE;
+ }
+ }
}
*value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
@@ -1282,13 +1290,21 @@ static void
pt_reset_interrupt_and_io_mapping(XenPCIPassthroughState *s)
e_device = PCI_SLOT(s->dev.devfn);
e_intx = pci_intx(s);
- if (s->machine_irq) {
+ if (s->msi_trans_en == 0 && s->machine_irq) {
if (xc_domain_unbind_pt_irq(xen_xc, xen_domid, s->machine_irq,
PT_IRQ_TYPE_PCI, 0, e_device, e_intx, 0)) {
PT_ERR(d, "Unbinding of interrupt failed!\n");
}
}
+ /* disable MSI/MSI-X and MSI-INTx translation */
+ if (s->msi) {
+ pt_msi_disable(s);
+ }
+ if (s->msix) {
+ pt_msix_disable(s);
+ }
+
/* clear all virtual region address */
for (i = 0; i < PCI_NUM_REGIONS; i++) {
r = &d->io_regions[i];
@@ -1536,6 +1552,415 @@ static XenPTRegInfo pt_emu_reg_pm_tbl[] = {
},
};
+/********************************
+ * MSI Capability
+ */
+
+/* Message Control register */
+static int pt_msgctrl_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ PCIDevice *d = &s->dev;
+ uint16_t reg_field = 0;
+
+ /* use I/O device register's value as initial value */
+ reg_field = pci_get_word(d->config + real_offset);
+
+ if (reg_field & PCI_MSI_FLAGS_ENABLE) {
+ PT_LOG(&s->dev, "MSI already enabled, disable it first\n");
+ host_pci_set_word(s->real_device, real_offset,
+ reg_field & ~PCI_MSI_FLAGS_ENABLE);
+ }
+ s->msi->flags |= reg_field | PT_MSI_FLAG_UNINIT;
+ s->msi->ctrl_offset = real_offset;
+
+ *data = reg->init_val;
+ return 0;
+}
+static int pt_msgctrl_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t dev_value,
+ uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+ uint16_t val;
+
+ /* Currently no support for multi-vector */
+ if (*value & PCI_MSI_FLAGS_QSIZE) {
+ PT_WARN(&s->dev, "try to set more than 1 vector ctrl %x\n", *value);
+ }
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+ /* update the msi_info too */
+ s->msi->flags |= cfg_entry->data &
+ ~(PT_MSI_FLAG_UNINIT | PT_MSI_FLAG_MAPPED | PCI_MSI_FLAGS_ENABLE);
+
+ /* create value for writing to I/O device register */
+ val = *value;
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* update MSI */
+ if (val & PCI_MSI_FLAGS_ENABLE) {
+ /* setup MSI pirq for the first time */
+ if (s->msi->flags & PT_MSI_FLAG_UNINIT) {
+ if (s->msi_trans_en) {
+ PT_LOG(&s->dev,
+ "guest enabling MSI, disable MSI-INTx translation\n");
+ pt_disable_msi_translate(s);
+ } else {
+ /* Init physical one */
+ PT_LOG(&s->dev, "setup MSI\n");
+ if (pt_msi_setup(s)) {
+ /* We do not broadcast the error to the framework code, so
+ * that MSI errors are contained in MSI emulation code and
+ * QEMU can go on running.
+ * Guest MSI would be actually not working.
+ */
+ *value &= ~PCI_MSI_FLAGS_ENABLE;
+ PT_WARN(&s->dev, "Can not map MSI.\n");
+ return 0;
+ }
+ }
+ if (pt_msi_update(s)) {
+ *value &= ~PCI_MSI_FLAGS_ENABLE;
+ PT_WARN(&s->dev, "Can not bind MSI\n");
+ return 0;
+ }
+ s->msi->flags &= ~PT_MSI_FLAG_UNINIT;
+ s->msi->flags |= PT_MSI_FLAG_MAPPED;
+ }
+ s->msi->flags |= PCI_MSI_FLAGS_ENABLE;
+ } else {
+ s->msi->flags &= ~PCI_MSI_FLAGS_ENABLE;
+ }
+
+ /* pass through MSI_ENABLE bit when no MSI-INTx translation */
+ if (!s->msi_trans_en) {
+ *value &= ~PCI_MSI_FLAGS_ENABLE;
+ *value |= val & PCI_MSI_FLAGS_ENABLE;
+ }
+
+ return 0;
+}
+
+/* initialize Message Upper Address register */
+static int pt_msgaddr64_reg_init(XenPCIPassthroughState *ptdev,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ /* no need to initialize in case of 32 bit type */
+ if (!(ptdev->msi->flags & PCI_MSI_FLAGS_64BIT)) {
+ *data = PT_INVALID_REG;
+ } else {
+ *data = reg->init_val;
+ }
+
+ return 0;
+}
+/* this function will be called twice (for 32 bit and 64 bit type) */
+/* initialize Message Data register */
+static int pt_msgdata_reg_init(XenPCIPassthroughState *ptdev,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ uint32_t flags = ptdev->msi->flags;
+ uint32_t offset = reg->offset;
+
+ /* check the offset whether matches the type or not */
+ if (((offset == PCI_MSI_DATA_64) && (flags & PCI_MSI_FLAGS_64BIT)) ||
+ ((offset == PCI_MSI_DATA_32) && !(flags & PCI_MSI_FLAGS_64BIT))) {
+ *data = reg->init_val;
+ } else {
+ *data = PT_INVALID_REG;
+ }
+ return 0;
+}
+
+/* write Message Address register */
+static int pt_msgaddr32_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint32_t *value,
+ uint32_t dev_value, uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t writable_mask = 0;
+ uint32_t throughable_mask = 0;
+ uint32_t old_addr = cfg_entry->data;
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+ /* update the msi_info too */
+ s->msi->addr_lo = cfg_entry->data;
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* update MSI */
+ if (cfg_entry->data != old_addr) {
+ if (s->msi->flags & PT_MSI_FLAG_MAPPED) {
+ pt_msi_update(s);
+ }
+ }
+
+ return 0;
+}
+/* write Message Upper Address register */
+static int pt_msgaddr64_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint32_t *value,
+ uint32_t dev_value, uint32_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint32_t writable_mask = 0;
+ uint32_t throughable_mask = 0;
+ uint32_t old_addr = cfg_entry->data;
+
+ /* check whether the type is 64 bit or not */
+ if (!(s->msi->flags & PCI_MSI_FLAGS_64BIT)) {
+ PT_ERR(&s->dev, "Write to the Upper Address without 64 bit support\n");
+ return -1;
+ }
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+ /* update the msi_info too */
+ s->msi->addr_hi = cfg_entry->data;
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* update MSI */
+ if (cfg_entry->data != old_addr) {
+ if (s->msi->flags & PT_MSI_FLAG_MAPPED) {
+ pt_msi_update(s);
+ }
+ }
+
+ return 0;
+}
+
+
+/* this function will be called twice (for 32 bit and 64 bit type) */
+/* write Message Data register */
+static int pt_msgdata_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
+ uint16_t *value, uint16_t dev_value,
+ uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+ uint16_t old_data = cfg_entry->data;
+ uint32_t flags = s->msi->flags;
+ uint32_t offset = reg->offset;
+
+ /* check the offset whether matches the type or not */
+ if (!((offset == PCI_MSI_DATA_64) && (flags & PCI_MSI_FLAGS_64BIT)) &&
+ !((offset == PCI_MSI_DATA_32) && !(flags & PCI_MSI_FLAGS_64BIT))) {
+ /* exit I/O emulator */
+ PT_ERR(&s->dev, "the offset does not match the 32/64 bit type!\n");
+ return -1;
+ }
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+ /* update the msi_info too */
+ s->msi->data = cfg_entry->data;
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* update MSI */
+ if (cfg_entry->data != old_data) {
+ if (flags & PT_MSI_FLAG_MAPPED) {
+ pt_msi_update(s);
+ }
+ }
+
+ return 0;
+}
+
+/* MSI Capability Structure reg static infomation table */
+static XenPTRegInfo pt_emu_reg_msi_tbl[] = {
+ /* Next Pointer reg */
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = pt_ptr_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = NULL,
+ },
+ /* Message Control reg */
+ {
+ .offset = PCI_MSI_FLAGS,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0xFF8E,
+ .emu_mask = 0x007F,
+ .init = pt_msgctrl_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_msgctrl_reg_write,
+ .u.w.restore = NULL,
+ },
+ /* Message Address reg */
+ {
+ .offset = PCI_MSI_ADDRESS_LO,
+ .size = 4,
+ .init_val = 0x00000000,
+ .ro_mask = 0x00000003,
+ .emu_mask = 0xFFFFFFFF,
+ .no_wb = 1,
+ .init = pt_common_reg_init,
+ .u.dw.read = pt_long_reg_read,
+ .u.dw.write = pt_msgaddr32_reg_write,
+ .u.dw.restore = NULL,
+ },
+ /* Message Upper Address reg (if PCI_MSI_FLAGS_64BIT set) */
+ {
+ .offset = PCI_MSI_ADDRESS_HI,
+ .size = 4,
+ .init_val = 0x00000000,
+ .ro_mask = 0x00000000,
+ .emu_mask = 0xFFFFFFFF,
+ .no_wb = 1,
+ .init = pt_msgaddr64_reg_init,
+ .u.dw.read = pt_long_reg_read,
+ .u.dw.write = pt_msgaddr64_reg_write,
+ .u.dw.restore = NULL,
+ },
+ /* Message Data reg (16 bits of data for 32-bit devices) */
+ {
+ .offset = PCI_MSI_DATA_32,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0x0000,
+ .emu_mask = 0xFFFF,
+ .no_wb = 1,
+ .init = pt_msgdata_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_msgdata_reg_write,
+ .u.w.restore = NULL,
+ },
+ /* Message Data reg (16 bits of data for 64-bit devices) */
+ {
+ .offset = PCI_MSI_DATA_64,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0x0000,
+ .emu_mask = 0xFFFF,
+ .no_wb = 1,
+ .init = pt_msgdata_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_msgdata_reg_write,
+ .u.w.restore = NULL,
+ },
+ {
+ .size = 0,
+ },
+};
+
+
+/**************************************
+ * MSI-X Capability
+ */
+
+/* Message Control register for MSI-X */
+static int pt_msixctrl_reg_init(XenPCIPassthroughState *s,
+ XenPTRegInfo *reg, uint32_t real_offset,
+ uint32_t *data)
+{
+ PCIDevice *d = &s->dev;
+ uint16_t reg_field = 0;
+
+ /* use I/O device register's value as initial value */
+ reg_field = pci_get_word(d->config + real_offset);
+
+ if (reg_field & PCI_MSIX_FLAGS_ENABLE) {
+ PT_LOG(d, "MSIX already enabled, disable it first\n");
+ host_pci_set_word(s->real_device, real_offset,
+ reg_field & ~PCI_MSIX_FLAGS_ENABLE);
+ }
+
+ s->msix->ctrl_offset = real_offset;
+
+ *data = reg->init_val;
+ return 0;
+}
+static int pt_msixctrl_reg_write(XenPCIPassthroughState *s,
+ XenPTReg *cfg_entry, uint16_t *value,
+ uint16_t dev_value, uint16_t valid_mask)
+{
+ XenPTRegInfo *reg = cfg_entry->reg;
+ uint16_t writable_mask = 0;
+ uint16_t throughable_mask = 0;
+
+ /* modify emulate register */
+ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
+ cfg_entry->data = PT_MERGE_VALUE(*value, cfg_entry->data, writable_mask);
+
+ /* create value for writing to I/O device register */
+ throughable_mask = ~reg->emu_mask & valid_mask;
+ *value = PT_MERGE_VALUE(*value, dev_value, throughable_mask);
+
+ /* update MSI-X */
+ if ((*value & PCI_MSIX_FLAGS_ENABLE)
+ && !(*value & PCI_MSIX_FLAGS_MASKALL)) {
+ if (s->msi_trans_en) {
+ PT_LOG(&s->dev,
+ "guest enabling MSI-X, disable MSI-INTx translation\n");
+ pt_disable_msi_translate(s);
+ }
+ pt_msix_update(s);
+ }
+
+ s->msix->enabled = !!(*value & PCI_MSIX_FLAGS_ENABLE);
+
+ return 0;
+}
+
+/* MSI-X Capability Structure reg static infomation table */
+static XenPTRegInfo pt_emu_reg_msix_tbl[] = {
+ /* Next Pointer reg */
+ {
+ .offset = PCI_CAP_LIST_NEXT,
+ .size = 1,
+ .init_val = 0x00,
+ .ro_mask = 0xFF,
+ .emu_mask = 0xFF,
+ .init = pt_ptr_reg_init,
+ .u.b.read = pt_byte_reg_read,
+ .u.b.write = pt_byte_reg_write,
+ .u.b.restore = NULL,
+ },
+ /* Message Control reg */
+ {
+ .offset = PCI_MSI_FLAGS,
+ .size = 2,
+ .init_val = 0x0000,
+ .ro_mask = 0x3FFF,
+ .emu_mask = 0x0000,
+ .init = pt_msixctrl_reg_init,
+ .u.w.read = pt_word_reg_read,
+ .u.w.write = pt_msixctrl_reg_write,
+ .u.w.restore = NULL,
+ },
+ {
+ .size = 0,
+ },
+};
+
/****************************
* Capabilities
@@ -1709,6 +2134,49 @@ static int pt_pcie_size_init(XenPCIPassthroughState *s,
*size = pcie_size;
return 0;
}
+/* get MSI Capability Structure register group size */
+static int pt_msi_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset, uint8_t *size)
+{
+ PCIDevice *d = &s->dev;
+ uint16_t msg_ctrl = 0;
+ uint8_t msi_size = 0xa;
+
+ msg_ctrl = pci_get_word(d->config + (base_offset + PCI_MSI_FLAGS));
+
+ /* check 64 bit address capable & Per-vector masking capable */
+ if (msg_ctrl & PCI_MSI_FLAGS_64BIT) {
+ msi_size += 4;
+ }
+ if (msg_ctrl & PCI_MSI_FLAGS_MASKBIT) {
+ msi_size += 10;
+ }
+
+ s->msi = g_new0(XenPTMSI, 1);
+ s->msi->pirq = PT_UNASSIGNED_PIRQ;
+
+ *size = msi_size;
+ return 0;
+}
+/* get MSI-X Capability Structure register group size */
+static int pt_msix_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset, uint8_t *size)
+{
+ int rc = 0;
+
+ rc = pt_msix_init(s, base_offset);
+
+ if (rc == -1) {
+ PT_ERR(&s->dev, "Internal error: Invalid pt_msix_init.\n");
+ return rc;
+ }
+
+ *size = grp_reg->grp_size;
+ return 0;
+}
+
static const XenPTRegGroupInfo pt_emu_reg_grp_tbl[] = {
/* Header Type0 reg group */
@@ -1749,6 +2217,14 @@ static const XenPTRegGroupInfo pt_emu_reg_grp_tbl[] = {
.grp_size = 0x04,
.size_init = pt_reg_grp_size_init,
},
+ /* MSI Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_MSI,
+ .grp_type = GRP_TYPE_EMU,
+ .grp_size = 0xFF,
+ .size_init = pt_msi_size_init,
+ .emu_reg_tbl = pt_emu_reg_msi_tbl,
+ },
/* PCI-X Capabilities List Item reg group */
{
.grp_id = PCI_CAP_ID_PCIX,
@@ -1793,6 +2269,14 @@ static const XenPTRegGroupInfo pt_emu_reg_grp_tbl[] = {
.size_init = pt_pcie_size_init,
.emu_reg_tbl = pt_emu_reg_pcie_tbl,
},
+ /* MSI-X Capability Structure reg group */
+ {
+ .grp_id = PCI_CAP_ID_MSIX,
+ .grp_type = GRP_TYPE_EMU,
+ .grp_size = 0x0C,
+ .size_init = pt_msix_size_init,
+ .emu_reg_tbl = pt_emu_reg_msix_tbl,
+ },
{
.grp_size = 0,
},
@@ -1965,8 +2449,11 @@ static int pt_init_pci_config(XenPCIPassthroughState *s)
return rc;
}
+ /* setup MSI-INTx translation if support */
+ rc = pt_enable_msi_translate(s);
+
/* rebind machine_irq to device */
- if (s->machine_irq != 0) {
+ if (rc < 0 && s->machine_irq != 0) {
uint8_t e_device = PCI_SLOT(s->dev.devfn);
uint8_t e_intx = pci_intx(s);
@@ -2117,6 +2604,14 @@ void pt_config_delete(XenPCIPassthroughState *s)
struct XenPTRegGroup *reg_group, *next_grp;
struct XenPTReg *reg, *next_reg;
+ /* free MSI/MSI-X info table */
+ if (s->msix) {
+ pt_msix_delete(s);
+ }
+ if (s->msi) {
+ g_free(s->msi);
+ }
+
/* free Power Management info table */
if (s->pm_state) {
if (s->pm_state->pm_timer) {
diff --git a/hw/xen_pci_passthrough_msi.c b/hw/xen_pci_passthrough_msi.c
new file mode 100644
index 0000000..73d3d9b
--- /dev/null
+++ b/hw/xen_pci_passthrough_msi.c
@@ -0,0 +1,678 @@
+/*
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ * Jiang Yunhong <yunhong.jiang@xxxxxxxxx>
+ *
+ * This file implements direct PCI assignment to a HVM guest
+ */
+
+#include <sys/mman.h>
+
+#include "xen_backend.h"
+#include "xen_pci_passthrough.h"
+#include "apic-msidef.h"
+
+
+#define AUTO_ASSIGN -1
+
+/* shift count for gflags */
+#define GFLAGS_SHIFT_DEST_ID 0
+#define GFLAGS_SHIFT_RH 8
+#define GFLAGS_SHIFT_DM 9
+#define GLFAGS_SHIFT_DELIV_MODE 12
+#define GLFAGS_SHIFT_TRG_MODE 15
+
+
+/*
+ * Helpers
+ */
+
+static uint32_t get_msi_gflags(uint32_t data, uint64_t addr)
+{
+ uint32_t result = 0;
+ int rh, dm, dest_id, deliv_mode, trig_mode;
+
+ rh = (addr >> MSI_ADDR_REDIRECTION_SHIFT) & 0x1;
+ dm = (addr >> MSI_ADDR_DEST_MODE_SHIFT) & 0x1;
+ dest_id = (addr >> MSI_ADDR_DEST_ID_SHIFT) & 0xff;
+ deliv_mode = (data >> MSI_DATA_DELIVERY_MODE_SHIFT) & 0x7;
+ trig_mode = (data >> MSI_DATA_TRIGGER_SHIFT) & 0x1;
+
+ result = dest_id | (rh << GFLAGS_SHIFT_RH) | (dm << GFLAGS_SHIFT_DM) |
+ (deliv_mode << GLFAGS_SHIFT_DELIV_MODE) |
+ (trig_mode << GLFAGS_SHIFT_TRG_MODE);
+
+ return result;
+}
+
+
+/*
+ * MSI virtualization functions
+ */
+
+void pt_msi_set_enable(XenPCIPassthroughState *s, int en)
+{
+ uint16_t val = 0;
+ uint32_t address = 0;
+
+ PT_LOG(&s->dev, "enable: %i\n", en);
+
+ if (!s->msi) {
+ return;
+ }
+
+ address = s->msi->ctrl_offset;
+ if (!address) {
+ return;
+ }
+
+ host_pci_get_word(s->real_device, address, &val);
+ val &= ~PCI_MSI_FLAGS_ENABLE;
+ val |= en & PCI_MSI_FLAGS_ENABLE;
+ host_pci_set_word(s->real_device, address, val);
+}
+
+/* setup physical msi, but don't enable it */
+int pt_msi_setup(XenPCIPassthroughState *s)
+{
+ int pirq = PT_UNASSIGNED_PIRQ;
+ uint8_t gvec = 0;
+ int rc = 0;
+
+ if (!(s->msi->flags & PT_MSI_FLAG_UNINIT)) {
+ PT_ERR(&s->dev, "Setup physical MSI when it's already initialized.\n");
+ return -1;
+ }
+
+ gvec = s->msi->data & 0xFF;
+ if (!gvec) {
+ /* if gvec is 0, the guest is asking for a particular pirq that
+ * is passed as dest_id */
+ pirq = (s->msi->addr_hi & 0xffffff00) |
+ ((s->msi->addr_lo >> MSI_ADDR_DEST_ID_SHIFT) & 0xff);
+ if (!pirq) {
+ /* this probably identifies an misconfiguration of the guest,
+ * try the emulated path */
+ pirq = PT_UNASSIGNED_PIRQ;
+ } else {
+ PT_LOG(&s->dev, "requested pirq: %d\n", pirq);
+ }
+ }
+
+ rc = xc_physdev_map_pirq_msi(xen_xc, xen_domid, AUTO_ASSIGN, &pirq,
+ PCI_DEVFN(s->real_device->dev,
+ s->real_device->func),
+ s->real_device->bus, 0, 0);
+ if (rc) {
+ PT_ERR(&s->dev, "Mapping of MSI failed. (rc: %d,"
+ " assigned device: %02x:%02x.%x)\n", rc,
+ s->real_device->dev, s->real_device->func, s->real_device->bus);
+ return -1;
+ }
+
+ if (pirq < 0) {
+ PT_ERR(&s->dev, "Invalid pirq number.\n");
+ return -1;
+ }
+
+ s->msi->pirq = pirq;
+ PT_LOG(&s->dev, "MSI mapped with pirq %d.\n", pirq);
+
+ return 0;
+}
+
+int pt_msi_update(XenPCIPassthroughState *s)
+{
+ uint8_t gvec = 0;
+ uint32_t gflags = 0;
+ uint64_t addr = 0;
+ int rc = 0;
+
+ /* get vector, address, flags info, etc. */
+ gvec = s->msi->data & 0xFF;
+ addr = (uint64_t)s->msi->addr_hi << 32 | s->msi->addr_lo;
+ gflags = get_msi_gflags(s->msi->data, addr);
+
+ PT_LOG(&s->dev, "Update MSI with pirq %d gvec 0x%x gflags 0x%x\n",
+ s->msi->pirq, gvec, gflags);
+
+ rc = xc_domain_update_msi_irq(xen_xc, xen_domid, gvec,
+ s->msi->pirq, gflags, 0);
+ if (rc) {
+ PT_ERR(&s->dev, "Binding of MSI failed. (rc: %d)\n", rc);
+
+ if (xc_physdev_unmap_pirq(xen_xc, xen_domid, s->msi->pirq)) {
+ PT_ERR(&s->dev, "Unmapping of MSI pirq %d failed.\n",
+ s->msi->pirq);
+ }
+ s->msi->pirq = PT_UNASSIGNED_PIRQ;
+ }
+ return rc;
+}
+
+void pt_msi_disable(XenPCIPassthroughState *s)
+{
+ PCIDevice *d = &s->dev;
+ uint8_t gvec = 0;
+ uint32_t gflags = 0;
+ uint64_t addr = 0;
+ uint8_t e_device = 0;
+ uint8_t e_intx = 0;
+
+ pt_msi_set_enable(s, 0);
+
+ e_device = PCI_SLOT(d->devfn);
+ e_intx = pci_intx(s);
+
+ if (s->msi_trans_en) {
+ if (xc_domain_unbind_pt_irq(xen_xc, xen_domid, s->msi->pirq,
+ PT_IRQ_TYPE_MSI_TRANSLATE, 0,
+ e_device, e_intx, 0)) {
+ PT_ERR(d, "Unbinding pt irq for MSI-INTx failed!\n");
+ goto out;
+ }
+ } else if (!(s->msi->flags & PT_MSI_FLAG_UNINIT)) {
+ /* get vector, address, flags info, etc. */
+ gvec = s->msi->data & 0xFF;
+ addr = (uint64_t)s->msi->addr_hi << 32 | s->msi->addr_lo;
+ gflags = get_msi_gflags(s->msi->data, addr);
+
+ PT_ERR(&s->dev, "Unbind MSI with pirq %x, gvec %x\n",
+ s->msi->pirq, gvec);
+
+ if (xc_domain_unbind_msi_irq(xen_xc, xen_domid, gvec,
+ s->msi->pirq, gflags)) {
+ PT_ERR(&s->dev, "Unbinding of MSI failed. (pirq: %d)\n",
+ s->msi->pirq);
+ goto out;
+ }
+ }
+
+ if (s->msi->pirq != PT_UNASSIGNED_PIRQ) {
+ PT_LOG(&s->dev, "Unmap msi with pirq %d\n", s->msi->pirq);
+
+ if (xc_physdev_unmap_pirq(xen_xc, xen_domid, s->msi->pirq)) {
+ PT_ERR(&s->dev, "Unmapping of MSI failed. (pirq: %d)\n",
+ s->msi->pirq);
+ goto out;
+ }
+ }
+
+out:
+ /* clear msi info */
+ s->msi->flags = 0;
+ s->msi->pirq = -1;
+ s->msi_trans_en = 0;
+}
+
+/*
+ * MSI-INTx translation virtualization functions
+ */
+
+int pt_enable_msi_translate(XenPCIPassthroughState *s)
+{
+ uint8_t e_device = 0;
+ uint8_t e_intx = 0;
+
+ if (!(s->msi && s->msi_trans_cap)) {
+ return -1;
+ }
+
+ pt_msi_set_enable(s, 0);
+ s->msi_trans_en = 0;
+
+ if (pt_msi_setup(s)) {
+ PT_ERR(&s->dev, "MSI-INTx translation MSI setup failed, fallback\n");
+ return -1;
+ }
+
+ e_device = PCI_SLOT(s->dev.devfn);
+ /* fix virtual interrupt pin to INTA# */
+ e_intx = pci_intx(s);
+
+ if (xc_domain_bind_pt_irq(xen_xc, xen_domid, s->msi->pirq,
+ PT_IRQ_TYPE_MSI_TRANSLATE, 0,
+ e_device, e_intx, 0)) {
+ PT_ERR(&s->dev, "MSI-INTx translation bind failed, fallback\n");
+
+ if (xc_physdev_unmap_pirq(xen_xc, xen_domid, s->msi->pirq)) {
+ PT_ERR(&s->dev, "Unmapping of MSI failed.\n");
+ }
+ s->msi->pirq = PT_UNASSIGNED_PIRQ;
+ return -1;
+ }
+
+ pt_msi_set_enable(s, 1);
+ s->msi_trans_en = 1;
+
+ return 0;
+}
+
+void pt_disable_msi_translate(XenPCIPassthroughState *s)
+{
+ uint8_t e_device = 0;
+ uint8_t e_intx = 0;
+
+ /* MSI_ENABLE bit should be disabed until the new handler is set */
+ pt_msi_set_enable(s, 0);
+
+ e_device = PCI_SLOT(s->dev.devfn);
+ e_intx = pci_intx(s);
+
+ if (xc_domain_unbind_pt_irq(xen_xc, xen_domid, s->msi->pirq,
+ PT_IRQ_TYPE_MSI_TRANSLATE, 0,
+ e_device, e_intx, 0)) {
+ PT_ERR(&s->dev, "Unbinding pt irq for MSI-INTx failed!\n");
+ }
+
+ if (s->machine_irq) {
+ if (xc_domain_bind_pt_pci_irq(xen_xc, xen_domid, s->machine_irq,
+ 0, e_device, e_intx)) {
+ PT_ERR(&s->dev, "Rebinding of interrupt failed!\n");
+ }
+ }
+
+ s->msi_trans_en = 0;
+}
+
+/*
+ * MSI-X virtualization functions
+ */
+
+static void msix_set_enable(XenPCIPassthroughState *s, int en)
+{
+ uint16_t val = 0;
+ uint32_t address = 0;
+
+ if (!s->msix) {
+ return;
+ }
+
+ address = s->msix->ctrl_offset;
+ if (!address) {
+ return;
+ }
+
+ host_pci_get_word(s->real_device, address, &val);
+ val &= ~PCI_MSIX_FLAGS_ENABLE;
+ if (en) {
+ val |= PCI_MSIX_FLAGS_ENABLE;
+ }
+ host_pci_set_word(s->real_device, address, val);
+}
+
+static void mask_physical_msix_entry(XenPCIPassthroughState *s,
+ int entry_nr, int mask)
+{
+ void *phys_off;
+
+ phys_off = s->msix->phys_iomem_base + 16 * entry_nr + 12;
+ *(uint32_t *)phys_off = mask;
+}
+
+static int pt_msix_update_one(XenPCIPassthroughState *s, int entry_nr)
+{
+ XenMSIXEntry *entry = &s->msix->msix_entry[entry_nr];
+ int pirq = entry->pirq;
+ int gvec = entry->io_mem[2] & 0xff;
+ uint64_t gaddr = *(uint64_t *)&entry->io_mem[0];
+ uint32_t gflags = get_msi_gflags(entry->io_mem[2], gaddr);
+ int rc;
+
+ if (!entry->flags) {
+ return 0;
+ }
+
+ if (!gvec) {
+ /* if gvec is 0, the guest is asking for a particular pirq that
+ * is passed as dest_id */
+ pirq = ((gaddr >> 32) & 0xffffff00) |
+ (((gaddr & 0xffffffff) >> MSI_ADDR_DEST_ID_SHIFT) & 0xff);
+ if (!pirq) {
+ /* this probably identifies an misconfiguration of the guest,
+ * try the emulated path */
+ pirq = PT_UNASSIGNED_PIRQ;
+ } else {
+ PT_LOG(&s->dev, "requested pirq: %d\n", pirq);
+ }
+ }
+
+ /* Check if this entry is already mapped */
+ if (entry->pirq == PT_UNASSIGNED_PIRQ) {
+ rc = xc_physdev_map_pirq_msi(xen_xc, xen_domid, AUTO_ASSIGN, &pirq,
+ PCI_DEVFN(s->real_device->dev,
+ s->real_device->func),
+ s->real_device->bus, entry_nr,
+ s->msix->table_base);
+ if (rc) {
+ PT_ERR(&s->dev, "Mapping msix entry %x\n", entry_nr);
+ return rc;
+ }
+ entry->pirq = pirq;
+ }
+
+ PT_LOG(&s->dev, "Update msix entry 0x%x with pirq %d gvec 0x%x\n",
+ entry_nr, pirq, gvec);
+
+ rc = xc_domain_update_msi_irq(xen_xc, xen_domid, gvec, pirq, gflags,
+ s->msix->mmio_base_addr);
+ if (rc) {
+ PT_ERR(&s->dev, "Updating msix irq %d info for entry %d\n",
+ pirq, entry_nr);
+
+ if (xc_physdev_unmap_pirq(xen_xc, xen_domid, entry->pirq)) {
+ PT_ERR(&s->dev, "Unmapping of MSI-X failed. (pirq: %d)\n",
+ entry->pirq);
+ }
+ entry->pirq = PT_UNASSIGNED_PIRQ;
+ return rc;
+ }
+
+ entry->flags = 0;
+
+ return 0;
+}
+
+int pt_msix_update(XenPCIPassthroughState *s)
+{
+ XenPTMSIX *msix = s->msix;
+ int i;
+
+ for (i = 0; i < msix->total_entries; i++) {
+ pt_msix_update_one(s, i);
+ }
+
+ return 0;
+}
+
+void pt_msix_disable(XenPCIPassthroughState *s)
+{
+ PCIDevice *d = &s->dev;
+ uint8_t gvec = 0;
+ uint32_t gflags = 0;
+ uint64_t addr = 0;
+ int i = 0;
+ XenMSIXEntry *entry = NULL;
+
+ msix_set_enable(s, 0);
+
+ for (i = 0; i < s->msix->total_entries; i++) {
+ entry = &s->msix->msix_entry[i];
+
+ if (entry->pirq == PT_UNASSIGNED_PIRQ) {
+ continue;
+ }
+
+ gvec = entry->io_mem[2] & 0xff;
+ addr = *(uint64_t *)&entry->io_mem[0];
+ gflags = get_msi_gflags(entry->io_mem[2], addr);
+
+ PT_LOG(d, "Unbind msix with pirq %d, gvec 0x%x\n",
+ entry->pirq, gvec);
+
+ if (xc_domain_unbind_msi_irq(xen_xc, xen_domid, gvec,
+ entry->pirq, gflags)) {
+ PT_ERR(d, "Unbinding of MSI-X failed.\n");
+ } else {
+ PT_LOG(d, "Unmap msix with pirq %d\n", entry->pirq);
+
+ if (xc_physdev_unmap_pirq(xen_xc, xen_domid, entry->pirq)) {
+ PT_ERR(d, "Unmapping of MSI-X failed.\n");
+ }
+ }
+ /* clear msi-x info */
+ entry->pirq = PT_UNASSIGNED_PIRQ;
+ entry->flags = 0;
+ }
+}
+
+int pt_msix_update_remap(XenPCIPassthroughState *s, int bar_index)
+{
+ XenMSIXEntry *entry;
+ int i, ret;
+
+ if (!(s->msix && s->msix->bar_index == bar_index)) {
+ return 0;
+ }
+
+ for (i = 0; i < s->msix->total_entries; i++) {
+ entry = &s->msix->msix_entry[i];
+ if (entry->pirq != PT_UNASSIGNED_PIRQ) {
+ ret = xc_domain_unbind_pt_irq(xen_xc, xen_domid, entry->pirq,
+ PT_IRQ_TYPE_MSI, 0, 0, 0, 0);
+ if (ret) {
+ PT_ERR(&s->dev, "unbind MSI-X entry %d failed\n", entry->pirq);
+ }
+ entry->flags = 1;
+ }
+ }
+ pt_msix_update(s);
+
+ return 0;
+}
+
+static void pci_msix_invalid_write(void *opaque, target_phys_addr_t addr,
+ uint32_t val)
+{
+ XenPCIPassthroughState *s = opaque;
+ PT_ERR(&s->dev, "Invalid write to MSI-X table,"
+ " only dword access is allowed.\n");
+}
+
+static void pci_msix_writel(void *opaque, target_phys_addr_t addr,
+ uint32_t val)
+{
+ XenPCIPassthroughState *s = opaque;
+ XenPTMSIX *msix = s->msix;
+ XenMSIXEntry *entry;
+ int entry_nr, offset;
+ void *phys_off;
+ uint32_t vec_ctrl;
+
+ if (addr % 4) {
+ PT_ERR(&s->dev, "Unaligned dword access to MSI-X table, "
+ "addr 0x"TARGET_FMT_plx"\n", addr);
+ return;
+ }
+
+ entry_nr = addr / 16;
+ entry = &msix->msix_entry[entry_nr];
+ offset = (addr % 16) / 4;
+
+ /*
+ * If Xen intercepts the mask bit access, io_mem[3] may not be
+ * up-to-date. Read from hardware directly.
+ */
+ phys_off = s->msix->phys_iomem_base + 16 * entry_nr + 12;
+ vec_ctrl = *(uint32_t *)phys_off;
+
+ if (offset != 3 && msix->enabled && !(vec_ctrl & 0x1)) {
+ PT_ERR(&s->dev, "Can't update msix entry %d since MSI-X is already "
+ "enabled.\n", entry_nr);
+ return;
+ }
+
+ if (offset != 3 && entry->io_mem[offset] != val) {
+ entry->flags = 1;
+ }
+ entry->io_mem[offset] = val;
+
+ if (offset == 3) {
+ if (msix->enabled && !(val & 0x1)) {
+ pt_msix_update_one(s, entry_nr);
+ }
+ mask_physical_msix_entry(s, entry_nr, entry->io_mem[3] & 0x1);
+ }
+}
+
+static CPUWriteMemoryFunc *pci_msix_write[] = {
+ pci_msix_invalid_write,
+ pci_msix_invalid_write,
+ pci_msix_writel
+};
+
+static uint32_t pci_msix_invalid_read(void *opaque, target_phys_addr_t addr)
+{
+ XenPCIPassthroughState *s = opaque;
+ PT_ERR(&s->dev, "Invalid read to MSI-X table,"
+ " only dword access is allowed.\n");
+ return 0;
+}
+
+static uint32_t pci_msix_readl(void *opaque, target_phys_addr_t addr)
+{
+ XenPCIPassthroughState *s = opaque;
+ XenPTMSIX *msix = s->msix;
+ int entry_nr, offset;
+
+ if (addr % 4) {
+ PT_ERR(&s->dev, "Unaligned dword access to MSI-X table, "
+ "addr 0x"TARGET_FMT_plx"\n", addr);
+ return 0;
+ }
+
+ entry_nr = addr / 16;
+ offset = (addr % 16) / 4;
+
+ return msix->msix_entry[entry_nr].io_mem[offset];
+}
+
+static CPUReadMemoryFunc *pci_msix_read[] = {
+ pci_msix_invalid_read,
+ pci_msix_invalid_read,
+ pci_msix_readl
+};
+
+int pt_add_msix_mapping(XenPCIPassthroughState *s, int bar_index)
+{
+ if (!(s->msix && s->msix->bar_index == bar_index)) {
+ return 0;
+ }
+
+ return xc_domain_memory_mapping(xen_xc, xen_domid,
+ s->msix->mmio_base_addr >> XC_PAGE_SHIFT,
+ (s->bases[bar_index].access.maddr + s->msix->table_off)
+ >> XC_PAGE_SHIFT,
+ (s->msix->total_entries * 16 + XC_PAGE_SIZE - 1) >> XC_PAGE_SHIFT,
+ DPCI_ADD_MAPPING);
+}
+
+int pt_remove_msix_mapping(XenPCIPassthroughState *s, int bar_index)
+{
+ if (!(s->msix && s->msix->bar_index == bar_index)) {
+ return 0;
+ }
+
+ s->msix->mmio_base_addr = s->bases[bar_index].e_physbase
+ + s->msix->table_off;
+
+ cpu_register_physical_memory(s->msix->mmio_base_addr,
+ s->msix->total_entries * 16,
+ s->msix->mmio_index);
+
+ return xc_domain_memory_mapping(xen_xc, xen_domid,
+ s->msix->mmio_base_addr >> XC_PAGE_SHIFT,
+ (s->bases[bar_index].access.maddr + s->msix->table_off)
+ >> XC_PAGE_SHIFT,
+ (s->msix->total_entries * 16 + XC_PAGE_SIZE - 1) >> XC_PAGE_SHIFT,
+ DPCI_REMOVE_MAPPING);
+}
+
+int pt_msix_init(XenPCIPassthroughState *s, int base)
+{
+ uint8_t id = 0;
+ uint16_t control = 0;
+ uint32_t table_off = 0;
+ int i, total_entries, bar_index;
+ HostPCIDevice *d = s->real_device;
+ int fd;
+
+ if (host_pci_get_byte(d, base + PCI_CAP_LIST_ID, &id)) {
+ return -1;
+ }
+
+ if (id != PCI_CAP_ID_MSIX) {
+ PT_ERR(&s->dev, "Invalid id %#x base %#x\n", id, base);
+ return -1;
+ }
+
+ host_pci_get_word(d, base + 2, &control);
+ total_entries = control & 0x7ff;
+ total_entries += 1;
+
+ s->msix = g_malloc0(sizeof (XenPTMSIX)
+ + total_entries * sizeof (XenMSIXEntry));
+
+ s->msix->total_entries = total_entries;
+ for (i = 0; i < total_entries; i++) {
+ s->msix->msix_entry[i].pirq = PT_UNASSIGNED_PIRQ;
+ }
+
+ s->msix->mmio_index =
+ cpu_register_io_memory(pci_msix_read, pci_msix_write,
+ s, DEVICE_NATIVE_ENDIAN);
+
+ host_pci_get_long(d, base + PCI_MSIX_TABLE, &table_off);
+ bar_index = s->msix->bar_index = table_off & PCI_MSIX_FLAGS_BIRMASK;
+ table_off = s->msix->table_off = table_off & ~PCI_MSIX_FLAGS_BIRMASK;
+ s->msix->table_base = s->real_device->io_regions[bar_index].base_addr;
+ PT_LOG(&s->dev, "get MSI-X table BAR base 0x%"PRIx64"\n",
+ s->msix->table_base);
+
+ fd = open("/dev/mem", O_RDWR);
+ if (fd == -1) {
+ PT_ERR(&s->dev, "Can't open /dev/mem: %s\n", strerror(errno));
+ goto error_out;
+ }
+ PT_LOG(&s->dev, "table_off = %#x, total_entries = %d\n",
+ table_off, total_entries);
+ s->msix->table_offset_adjust = table_off & 0x0fff;
+ s->msix->phys_iomem_base =
+ mmap(0,
+ total_entries * 16 + s->msix->table_offset_adjust,
+ PROT_WRITE | PROT_READ,
+ MAP_SHARED | MAP_LOCKED,
+ fd,
+ s->msix->table_base + table_off - s->msix->table_offset_adjust);
+
+ if (s->msix->phys_iomem_base == MAP_FAILED) {
+ PT_ERR(&s->dev, "Can't map physical MSI-X table: %s\n",
+ strerror(errno));
+ close(fd);
+ goto error_out;
+ }
+ s->msix->phys_iomem_base = (char *)s->msix->phys_iomem_base
+ + s->msix->table_offset_adjust;
+
+ close(fd);
+
+ PT_LOG(&s->dev, "mapping physical MSI-X table to %p\n",
+ s->msix->phys_iomem_base);
+ return 0;
+
+error_out:
+ g_free(s->msix);
+ s->msix = NULL;
+ return -1;
+}
+
+void pt_msix_delete(XenPCIPassthroughState *s)
+{
+ /* unmap the MSI-X memory mapped register area */
+ if (s->msix->phys_iomem_base) {
+ PT_LOG(&s->dev, "unmapping physical MSI-X table from %p\n",
+ s->msix->phys_iomem_base);
+ munmap(s->msix->phys_iomem_base, s->msix->total_entries * 16 +
+ s->msix->table_offset_adjust);
+ }
+
+ if (s->msix->mmio_index > 0) {
+ cpu_unregister_io_memory(s->msix->mmio_index);
+ }
+
+ g_free(s->msix);
+ s->msix = NULL;
+}
--
Anthony PERARD
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