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Subject[PATCH 1/3] perf, uncore: add auxiliary pci device support
Date
From: "Yan, Zheng" <zheng.z.yan@intel.com>

The QPI uncore boxes have two pairs of MATCH/MASK registers that
user to filter packet traffic serviced by QPI link layer. These
registers are in auxiliary PCI devices.

This patch changes the meaning of (struct pci_device_id)->driver_data.
The first 8 bits are device index of the same uncore type, the second
8 bytes are uncore type index. Auxiliary PCI device's type is defined
as UNCORE_EXTRA_PCI_DEV(0xff)

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
---
arch/x86/kernel/cpu/perf_event_intel_uncore.c | 111 ++++++++++++++------------
arch/x86/kernel/cpu/perf_event_intel_uncore.h | 9 +++
2 files changed, 68 insertions(+), 52 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index cad791d..7ce9b35 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -6,6 +6,8 @@ static struct intel_uncore_type **pci_uncores = empty_uncore;
/* pci bus to socket mapping */
static int pcibus_to_physid[256] = { [0 ... 255] = -1, };

+static struct pci_dev *extra_pci_dev[UNCORE_SOCKET_MAX][UNCORE_EXTRA_PCI_DEV_MAX];
+
static DEFINE_RAW_SPINLOCK(uncore_box_lock);

/* mask of cpus that collect uncore events */
@@ -807,43 +809,43 @@ static struct intel_uncore_type *snbep_pci_uncores[] = {
static DEFINE_PCI_DEVICE_TABLE(snbep_uncore_pci_ids) = {
{ /* Home Agent */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_UNC_HA),
- .driver_data = SNBEP_PCI_UNCORE_HA,
+ .driver_data = UNCORE_PCI_DEV_DATA(SNBEP_PCI_UNCORE_HA, 0),
},
{ /* MC Channel 0 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_UNC_IMC0),
- .driver_data = SNBEP_PCI_UNCORE_IMC,
+ .driver_data = UNCORE_PCI_DEV_DATA(SNBEP_PCI_UNCORE_IMC, 0),
},
{ /* MC Channel 1 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_UNC_IMC1),
- .driver_data = SNBEP_PCI_UNCORE_IMC,
+ .driver_data = UNCORE_PCI_DEV_DATA(SNBEP_PCI_UNCORE_IMC, 1),
},
{ /* MC Channel 2 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_UNC_IMC2),
- .driver_data = SNBEP_PCI_UNCORE_IMC,
+ .driver_data = UNCORE_PCI_DEV_DATA(SNBEP_PCI_UNCORE_IMC, 2),
},
{ /* MC Channel 3 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_UNC_IMC3),
- .driver_data = SNBEP_PCI_UNCORE_IMC,
+ .driver_data = UNCORE_PCI_DEV_DATA(SNBEP_PCI_UNCORE_IMC, 3),
},
{ /* QPI Port 0 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_UNC_QPI0),
- .driver_data = SNBEP_PCI_UNCORE_QPI,
+ .driver_data = UNCORE_PCI_DEV_DATA(SNBEP_PCI_UNCORE_QPI, 0),
},
{ /* QPI Port 1 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_UNC_QPI1),
- .driver_data = SNBEP_PCI_UNCORE_QPI,
+ .driver_data = UNCORE_PCI_DEV_DATA(SNBEP_PCI_UNCORE_QPI, 1),
},
{ /* R2PCIe */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_UNC_R2PCIE),
- .driver_data = SNBEP_PCI_UNCORE_R2PCIE,
+ .driver_data = UNCORE_PCI_DEV_DATA(SNBEP_PCI_UNCORE_R2PCIE, 0),
},
{ /* R3QPI Link 0 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_UNC_R3QPI0),
- .driver_data = SNBEP_PCI_UNCORE_R3QPI,
+ .driver_data = UNCORE_PCI_DEV_DATA(SNBEP_PCI_UNCORE_R3QPI, 0),
},
{ /* R3QPI Link 1 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_UNC_R3QPI1),
- .driver_data = SNBEP_PCI_UNCORE_R3QPI,
+ .driver_data = UNCORE_PCI_DEV_DATA(SNBEP_PCI_UNCORE_R3QPI, 1),
},
{ /* end: all zeroes */ }
};
@@ -1256,71 +1258,71 @@ static struct intel_uncore_type *ivt_pci_uncores[] = {
static DEFINE_PCI_DEVICE_TABLE(ivt_uncore_pci_ids) = {
{ /* Home Agent 0 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe30),
- .driver_data = IVT_PCI_UNCORE_HA,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_HA, 0),
},
{ /* Home Agent 1 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe38),
- .driver_data = IVT_PCI_UNCORE_HA,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_HA, 1),
},
{ /* MC0 Channel 0 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xeb4),
- .driver_data = IVT_PCI_UNCORE_IMC,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_IMC, 0),
},
{ /* MC0 Channel 1 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xeb5),
- .driver_data = IVT_PCI_UNCORE_IMC,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_IMC, 1),
},
{ /* MC0 Channel 3 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xeb0),
- .driver_data = IVT_PCI_UNCORE_IMC,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_IMC, 2),
},
{ /* MC0 Channel 4 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xeb1),
- .driver_data = IVT_PCI_UNCORE_IMC,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_IMC, 3),
},
{ /* MC1 Channel 0 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xef4),
- .driver_data = IVT_PCI_UNCORE_IMC,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_IMC, 4),
},
{ /* MC1 Channel 1 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xef5),
- .driver_data = IVT_PCI_UNCORE_IMC,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_IMC, 5),
},
{ /* MC1 Channel 3 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xef0),
- .driver_data = IVT_PCI_UNCORE_IMC,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_IMC, 6),
},
{ /* MC1 Channel 4 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xef1),
- .driver_data = IVT_PCI_UNCORE_IMC,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_IMC, 7),
},
{ /* QPI0 Port 0 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe32),
- .driver_data = IVT_PCI_UNCORE_QPI,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_QPI, 0),
},
{ /* QPI0 Port 1 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe33),
- .driver_data = IVT_PCI_UNCORE_QPI,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_QPI, 1),
},
{ /* QPI1 Port 2 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe3a),
- .driver_data = IVT_PCI_UNCORE_QPI,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_QPI, 2),
},
{ /* R2PCIe */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe34),
- .driver_data = IVT_PCI_UNCORE_R2PCIE,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_R2PCIE, 0),
},
{ /* R3QPI0 Link 0 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe36),
- .driver_data = IVT_PCI_UNCORE_R3QPI,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_R3QPI, 0),
},
{ /* R3QPI0 Link 1 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe37),
- .driver_data = IVT_PCI_UNCORE_R3QPI,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_R3QPI, 1),
},
{ /* R3QPI1 Link 2 */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe3e),
- .driver_data = IVT_PCI_UNCORE_R3QPI,
+ .driver_data = UNCORE_PCI_DEV_DATA(IVT_PCI_UNCORE_R3QPI, 2),
},
{ /* end: all zeroes */ }
};
@@ -3167,16 +3169,24 @@ static bool pcidrv_registered;
/*
* add a pci uncore device
*/
-static int uncore_pci_add(struct intel_uncore_type *type, struct pci_dev *pdev)
+static int uncore_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct intel_uncore_pmu *pmu;
struct intel_uncore_box *box;
- int i, phys_id;
+ struct intel_uncore_type *type;
+ int phys_id;

phys_id = pcibus_to_physid[pdev->bus->number];
if (phys_id < 0)
return -ENODEV;

+ if (UNCORE_PCI_DEV_TYPE(id->driver_data) == UNCORE_EXTRA_PCI_DEV) {
+ extra_pci_dev[phys_id][UNCORE_PCI_DEV_IDX(id->driver_data)] = pdev;
+ pci_set_drvdata(pdev, NULL);
+ return 0;
+ }
+
+ type = pci_uncores[UNCORE_PCI_DEV_TYPE(id->driver_data)];
box = uncore_alloc_box(type, 0);
if (!box)
return -ENOMEM;
@@ -3185,21 +3195,11 @@ static int uncore_pci_add(struct intel_uncore_type *type, struct pci_dev *pdev)
* for performance monitoring unit with multiple boxes,
* each box has a different function id.
*/
- for (i = 0; i < type->num_boxes; i++) {
- pmu = &type->pmus[i];
- if (pmu->func_id == pdev->devfn)
- break;
- if (pmu->func_id < 0) {
- pmu->func_id = pdev->devfn;
- break;
- }
- pmu = NULL;
- }
-
- if (!pmu) {
- kfree(box);
- return -EINVAL;
- }
+ pmu = &type->pmus[UNCORE_PCI_DEV_IDX(id->driver_data)];
+ if (pmu->func_id < 0)
+ pmu->func_id = pdev->devfn;
+ else
+ WARN_ON_ONCE(pmu->func_id != pdev->devfn);

box->phys_id = phys_id;
box->pci_dev = pdev;
@@ -3217,9 +3217,22 @@ static int uncore_pci_add(struct intel_uncore_type *type, struct pci_dev *pdev)
static void uncore_pci_remove(struct pci_dev *pdev)
{
struct intel_uncore_box *box = pci_get_drvdata(pdev);
- struct intel_uncore_pmu *pmu = box->pmu;
- int cpu, phys_id = pcibus_to_physid[pdev->bus->number];
+ struct intel_uncore_pmu *pmu;
+ int i, cpu, phys_id = pcibus_to_physid[pdev->bus->number];

+ box = pci_get_drvdata(pdev);
+ if (!box) {
+ for (i = 0; i < UNCORE_EXTRA_PCI_DEV_MAX; i++) {
+ if (extra_pci_dev[phys_id][i] == pdev) {
+ extra_pci_dev[phys_id][i] = NULL;
+ break;
+ }
+ }
+ WARN_ON_ONCE(i >= UNCORE_EXTRA_PCI_DEV_MAX);
+ return;
+ }
+
+ pmu = box->pmu;
if (WARN_ON_ONCE(phys_id != box->phys_id))
return;

@@ -3240,12 +3253,6 @@ static void uncore_pci_remove(struct pci_dev *pdev)
kfree(box);
}

-static int uncore_pci_probe(struct pci_dev *pdev,
- const struct pci_device_id *id)
-{
- return uncore_pci_add(pci_uncores[id->driver_data], pdev);
-}
-
static int __init uncore_pci_init(void)
{
int ret;
diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.h b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
index 47b3d00..ede5a8c 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.h
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
@@ -12,6 +12,15 @@
#define UNCORE_PMC_IDX_FIXED UNCORE_PMC_IDX_MAX_GENERIC
#define UNCORE_PMC_IDX_MAX (UNCORE_PMC_IDX_FIXED + 1)

+#define UNCORE_PCI_DEV_DATA(type, idx) ((type << 8) | idx)
+#define UNCORE_PCI_DEV_TYPE(data) ((data >> 8) & 0xff)
+#define UNCORE_PCI_DEV_IDX(data) (data & 0xff)
+#define UNCORE_EXTRA_PCI_DEV 0xff
+#define UNCORE_EXTRA_PCI_DEV_MAX 0
+
+/* support up to 8 sockets */
+#define UNCORE_SOCKET_MAX 8
+
#define UNCORE_EVENT_CONSTRAINT(c, n) EVENT_CONSTRAINT(c, n, 0xff)

/* SNB event control */
--
1.8.1.4


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