# HG changeset patch
# User Wei Wang <wei.wang2@xxxxxxx>
# Date 1319201422 -7200
# Node ID f2fbc041f4a710b66f98e76ad8905dcac7920c18
# Parent bb1330a1f8c7149fb39578382d9f5dfeef13ffa9
Add new ATS helper functions
Signed-off-by Wei Wang <wei.wang2@xxxxxxx>
diff -r bb1330a1f8c7 -r f2fbc041f4a7 xen/drivers/passthrough/pci.c
--- a/xen/drivers/passthrough/pci.c Fri Oct 21 14:50:21 2011 +0200
+++ b/xen/drivers/passthrough/pci.c Fri Oct 21 14:50:22 2011 +0200
@@ -838,6 +838,74 @@ void disable_ats_device(int seg, int bus
seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
}
+int pci_ats_enabled(int seg, int bus, int devfn)
+{
+ u32 value;
+ int pos;
+
+ pos = pci_find_ext_capability(seg, bus, devfn, PCI_EXT_CAP_ID_ATS);
+ BUG_ON(!pos);
+
+ value = pci_conf_read16(seg, bus, PCI_SLOT(devfn),
+ PCI_FUNC(devfn), pos + ATS_REG_CTL);
+ return value & ATS_ENABLE;
+}
+
+static void parse_ats_param(char *s);
+custom_param("ats", parse_ats_param);
+
+bool_t __read_mostly ats_enabled = 1;
+
+static void __init parse_ats_param(char *s)
+{
+ char *ss;
+
+ do {
+ ss = strchr(s, ',');
+ if ( ss )
+ *ss = '\0';
+
+ switch ( parse_bool(s) )
+ {
+ case 0:
+ ats_enabled = 0;
+ break;
+ case 1:
+ ats_enabled = 1;
+ break;
+ }
+
+ s = ss + 1;
+ } while ( ss );
+}
+
+int pci_ats_device(int seg, int bus, int devfn)
+{
+ if ( !ats_enabled )
+ return 0;
+
+ if ( !pci_find_ext_capability(seg, bus, devfn, PCI_EXT_CAP_ID_ATS) )
+ return 0;
+
+ return 1;
+}
+
+struct pci_ats_dev* get_ats_device(int seg, int bus, int devfn)
+{
+ struct pci_ats_dev *pdev;
+
+ if ( !pci_ats_device(seg, bus, devfn) )
+ return NULL;
+
+ list_for_each_entry ( pdev, &ats_devices, list )
+ {
+ if ( pdev->seg == seg && pdev->bus == bus && pdev->devfn == devfn )
+ return pdev;
+ }
+
+ return NULL;
+}
+
/*
* Local variables:
* mode: C
diff -r bb1330a1f8c7 -r f2fbc041f4a7 xen/drivers/passthrough/vtd/x86/ats.c
--- a/xen/drivers/passthrough/vtd/x86/ats.c Fri Oct 21 14:50:21 2011 +0200
+++ b/xen/drivers/passthrough/vtd/x86/ats.c Fri Oct 21 14:50:22 2011 +0200
@@ -29,35 +29,6 @@
#include "../extern.h"
static LIST_HEAD(ats_dev_drhd_units);
-
-static void parse_ats_param(char *s);
-custom_param("ats", parse_ats_param);
-
-bool_t __read_mostly ats_enabled = 1;
-
-static void __init parse_ats_param(char *s)
-{
- char *ss;
-
- do {
- ss = strchr(s, ',');
- if ( ss )
- *ss = '\0';
-
- switch ( parse_bool(s) )
- {
- case 0:
- ats_enabled = 0;
- break;
- case 1:
- ats_enabled = 1;
- break;
- }
-
- s = ss + 1;
- } while ( ss );
-}
-
struct acpi_drhd_unit * find_ats_dev_drhd(struct iommu *iommu)
{
struct acpi_drhd_unit *drhd;
diff -r bb1330a1f8c7 -r f2fbc041f4a7 xen/include/xen/pci.h
--- a/xen/include/xen/pci.h Fri Oct 21 14:50:21 2011 +0200
+++ b/xen/include/xen/pci.h Fri Oct 21 14:50:22 2011 +0200
@@ -152,5 +152,8 @@ void pci_enable_acs(struct pci_dev *pdev
int enable_ats_device(int seg, int bus, int devfn);
void disable_ats_device(int seg, int bus, int devfn);
+int pci_ats_enabled(int seg, int bus, int devfn);
+int pci_ats_device(int seg, int bus, int devfn);
+struct pci_ats_dev* get_ats_device(int seg, int bus, int devfn);
#endif /* __XEN_PCI_H__ */
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