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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v1 01/14] xen/pci: Refactor MSI code that implements MSI functionality within XEN
MSI code that implements MSI functionality to support MSI within XEN is
not usable on ARM. Move the code under CONFIG_HAS_PCI_MSI flag to gate
the code for ARM.
No functional change intended.
Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
---
xen/arch/x86/Kconfig | 1 +
xen/drivers/passthrough/Makefile | 1 +
xen/drivers/passthrough/msi.c | 96 ++++++++++++++++++++++++++++++++
xen/drivers/passthrough/pci.c | 54 +++++-------------
xen/drivers/pci/Kconfig | 4 ++
xen/include/xen/msi.h | 56 +++++++++++++++++++
xen/xsm/flask/hooks.c | 8 +--
7 files changed, 175 insertions(+), 45 deletions(-)
create mode 100644 xen/drivers/passthrough/msi.c
create mode 100644 xen/include/xen/msi.h
diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig
index 9b164db641..7b46ee98c5 100644
--- a/xen/arch/x86/Kconfig
+++ b/xen/arch/x86/Kconfig
@@ -19,6 +19,7 @@ config X86
select HAS_NS16550
select HAS_PASSTHROUGH
select HAS_PCI
+ select HAS_PCI_MSI
select HAS_PDX
select HAS_SCHED_GRANULARITY
select HAS_UBSAN
diff --git a/xen/drivers/passthrough/Makefile b/xen/drivers/passthrough/Makefile
index 445690e3e5..a5efa22714 100644
--- a/xen/drivers/passthrough/Makefile
+++ b/xen/drivers/passthrough/Makefile
@@ -7,3 +7,4 @@ obj-y += iommu.o
obj-$(CONFIG_HAS_PCI) += pci.o
obj-$(CONFIG_HAS_DEVICE_TREE) += device_tree.o
obj-$(CONFIG_HAS_PCI) += ats.o
+obj-$(CONFIG_HAS_PCI_MSI) += msi.o
diff --git a/xen/drivers/passthrough/msi.c b/xen/drivers/passthrough/msi.c
new file mode 100644
index 0000000000..15ad0f8160
--- /dev/null
+++ b/xen/drivers/passthrough/msi.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2008, Netronome Systems, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <xen/init.h>
+#include <xen/pci.h>
+#include <asm/msi.h>
+#include <asm/hvm/io.h>
+
+int pdev_msix_assign(struct domain *d, struct pci_dev *pdev)
+{
+ int rc;
+
+ if ( pdev->msix )
+ {
+ rc = pci_reset_msix_state(pdev);
+ if ( rc )
+ return rc;
+ msixtbl_init(d);
+ }
+
+ return 0;
+}
+
+int pdev_msi_init(struct pci_dev *pdev)
+{
+ unsigned int pos;
+
+ INIT_LIST_HEAD(&pdev->msi_list);
+
+ pos = pci_find_cap_offset(pdev->seg, pdev->bus, PCI_SLOT(pdev->devfn),
+ PCI_FUNC(pdev->devfn), PCI_CAP_ID_MSI);
+ if ( pos )
+ {
+ uint16_t ctrl = pci_conf_read16(pdev->sbdf, msi_control_reg(pos));
+
+ pdev->msi_maxvec = multi_msi_capable(ctrl);
+ }
+
+ pos = pci_find_cap_offset(pdev->seg, pdev->bus, PCI_SLOT(pdev->devfn),
+ PCI_FUNC(pdev->devfn), PCI_CAP_ID_MSIX);
+ if ( pos )
+ {
+ struct arch_msix *msix = xzalloc(struct arch_msix);
+ uint16_t ctrl;
+
+ if ( !msix )
+ return -ENOMEM;
+
+ spin_lock_init(&msix->table_lock);
+
+ ctrl = pci_conf_read16(pdev->sbdf, msix_control_reg(pos));
+ msix->nr_entries = msix_table_size(ctrl);
+
+ pdev->msix = msix;
+ }
+
+ return 0;
+}
+
+void pdev_msi_deinit(struct pci_dev *pdev)
+{
+ XFREE(pdev->msix);
+}
+
+void pdev_dump_msi(const struct pci_dev *pdev)
+{
+ const struct msi_desc *msi;
+
+ printk("- MSIs < ");
+ list_for_each_entry ( msi, &pdev->msi_list, list )
+ printk("%d ", msi->irq);
+ printk(">");
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/drivers/passthrough/pci.c b/xen/drivers/passthrough/pci.c
index fc4fa2e5c3..67f5686ab6 100644
--- a/xen/drivers/passthrough/pci.c
+++ b/xen/drivers/passthrough/pci.c
@@ -32,8 +32,8 @@
#include <xen/softirq.h>
#include <xen/tasklet.h>
#include <xen/vpci.h>
+#include <xen/msi.h>
#include <xsm/xsm.h>
-#include <asm/msi.h>
#include "ats.h"
struct pci_seg {
@@ -314,6 +314,7 @@ static struct pci_dev *alloc_pdev(struct pci_seg *pseg, u8
bus, u8 devfn)
{
struct pci_dev *pdev;
unsigned int pos;
+ int rc;
list_for_each_entry ( pdev, &pseg->alldevs_list, alldevs_list )
if ( pdev->bus == bus && pdev->devfn == devfn )
@@ -327,35 +328,12 @@ static struct pci_dev *alloc_pdev(struct pci_seg *pseg,
u8 bus, u8 devfn)
*((u8*) &pdev->bus) = bus;
*((u8*) &pdev->devfn) = devfn;
pdev->domain = NULL;
- INIT_LIST_HEAD(&pdev->msi_list);
-
- pos = pci_find_cap_offset(pseg->nr, bus, PCI_SLOT(devfn), PCI_FUNC(devfn),
- PCI_CAP_ID_MSI);
- if ( pos )
- {
- uint16_t ctrl = pci_conf_read16(pdev->sbdf, msi_control_reg(pos));
-
- pdev->msi_maxvec = multi_msi_capable(ctrl);
- }
- pos = pci_find_cap_offset(pseg->nr, bus, PCI_SLOT(devfn), PCI_FUNC(devfn),
- PCI_CAP_ID_MSIX);
- if ( pos )
+ rc = pdev_msi_init(pdev);
+ if ( rc )
{
- struct arch_msix *msix = xzalloc(struct arch_msix);
- uint16_t ctrl;
-
- if ( !msix )
- {
- xfree(pdev);
- return NULL;
- }
- spin_lock_init(&msix->table_lock);
-
- ctrl = pci_conf_read16(pdev->sbdf, msix_control_reg(pos));
- msix->nr_entries = msix_table_size(ctrl);
-
- pdev->msix = msix;
+ xfree(pdev);
+ return NULL;
}
list_add(&pdev->alldevs_list, &pseg->alldevs_list);
@@ -449,7 +427,7 @@ static void free_pdev(struct pci_seg *pseg, struct pci_dev
*pdev)
}
list_del(&pdev->alldevs_list);
- xfree(pdev->msix);
+ pdev_msi_deinit(pdev);
xfree(pdev);
}
@@ -1271,18 +1249,16 @@ bool_t pcie_aer_get_firmware_first(const struct pci_dev
*pdev)
static int _dump_pci_devices(struct pci_seg *pseg, void *arg)
{
struct pci_dev *pdev;
- struct msi_desc *msi;
printk("==== segment %04x ====\n", pseg->nr);
list_for_each_entry ( pdev, &pseg->alldevs_list, alldevs_list )
{
- printk("%pp - %pd - node %-3d - MSIs < ",
+ printk("%pp - %pd - node %-3d ",
&pdev->sbdf, pdev->domain,
(pdev->node != NUMA_NO_NODE) ? pdev->node : -1);
- list_for_each_entry ( msi, &pdev->msi_list, list )
- printk("%d ", msi->irq);
- printk(">\n");
+ pdev_dump_msi(pdev);
+ printk("\n");
}
return 0;
@@ -1422,13 +1398,9 @@ static int assign_device(struct domain *d, u16 seg, u8
bus, u8 devfn, u32 flag)
ASSERT(pdev && (pdev->domain == hardware_domain ||
pdev->domain == dom_io));
- if ( pdev->msix )
- {
- rc = pci_reset_msix_state(pdev);
- if ( rc )
- goto done;
- msixtbl_init(d);
- }
+ rc = pdev_msix_assign(d, pdev);
+ if ( rc )
+ goto done;
pdev->fault.count = 0;
diff --git a/xen/drivers/pci/Kconfig b/xen/drivers/pci/Kconfig
index 7da03fa13b..c6a7bc8007 100644
--- a/xen/drivers/pci/Kconfig
+++ b/xen/drivers/pci/Kconfig
@@ -1,3 +1,7 @@
config HAS_PCI
bool
+
+config HAS_PCI_MSI
+ bool
+ depends on HAS_PCI
diff --git a/xen/include/xen/msi.h b/xen/include/xen/msi.h
new file mode 100644
index 0000000000..b2d5bc6f9d
--- /dev/null
+++ b/xen/include/xen/msi.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2008, Netronome Systems, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __XEN_MSI_H_
+#define __XEN_MSI_H_
+
+#ifdef CONFIG_HAS_PCI_MSI
+
+#include <asm/msi.h>
+
+int pdev_msix_assign(struct domain *d, struct pci_dev *pdev);
+int pdev_msi_init(struct pci_dev *pdev);
+void pdev_msi_deinit(struct pci_dev *pdev);
+void pdev_dump_msi(const struct pci_dev *pdev);
+
+#else /* !CONFIG_HAS_PCI_MSI */
+static inline int pdev_msix_assign(struct domain *d, struct pci_dev *pdev)
+{
+ return 0;
+}
+
+static inline int pdev_msi_init(struct pci_dev *pdev)
+{
+ return 0;
+}
+
+static inline void pdev_msi_deinit(struct pci_dev *pdev) {}
+static inline void pci_cleanup_msi(struct pci_dev *pdev) {}
+static inline void pdev_dump_msi(const struct pci_dev *pdev) {}
+
+#endif /* CONFIG_HAS_PCI_MSI */
+
+#endif /* __XEN_MSI_H */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/xsm/flask/hooks.c b/xen/xsm/flask/hooks.c
index f1a1217c98..fdcfeb984c 100644
--- a/xen/xsm/flask/hooks.c
+++ b/xen/xsm/flask/hooks.c
@@ -21,7 +21,7 @@
#include <xen/guest_access.h>
#include <xen/xenoprof.h>
#include <xen/iommu.h>
-#ifdef CONFIG_HAS_PCI
+#ifdef CONFIG_HAS_PCI_MSI
#include <asm/msi.h>
#endif
#include <public/xen.h>
@@ -114,7 +114,7 @@ static int get_irq_sid(int irq, u32 *sid, struct
avc_audit_data *ad)
}
return security_irq_sid(irq, sid);
}
-#ifdef CONFIG_HAS_PCI
+#ifdef CONFIG_HAS_PCI_MSI
{
struct irq_desc *desc = irq_to_desc(irq);
if ( desc->msi_desc && desc->msi_desc->dev ) {
@@ -874,7 +874,7 @@ static int flask_map_domain_pirq (struct domain *d)
static int flask_map_domain_msi (struct domain *d, int irq, const void *data,
u32 *sid, struct avc_audit_data *ad)
{
-#ifdef CONFIG_HAS_PCI
+#ifdef CONFIG_HAS_PCI_MSI
const struct msi_info *msi = data;
u32 machine_bdf = (msi->seg << 16) | (msi->bus << 8) | msi->devfn;
@@ -940,7 +940,7 @@ static int flask_unmap_domain_pirq (struct domain *d)
static int flask_unmap_domain_msi (struct domain *d, int irq, const void *data,
u32 *sid, struct avc_audit_data *ad)
{
-#ifdef CONFIG_HAS_PCI
+#ifdef CONFIG_HAS_PCI_MSI
const struct pci_dev *pdev = data;
u32 machine_bdf = (pdev->seg << 16) | (pdev->bus << 8) | pdev->devfn;
--
2.17.1
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