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Message-ID: <20240619172109.497639-3-srinivas.pandruvada@linux.intel.com>
Date: Wed, 19 Jun 2024 10:21:08 -0700
From: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To: rafael@...nel.org,
daniel.lezcano@...aro.org,
rui.zhang@...el.com,
lukasz.luba@....com
Cc: linux-pm@...r.kernel.org,
linux-kernel@...r.kernel.org,
Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: [PATCH 2/3] thermal: intel: int340x: Support MSI interrupt for Lunar Lake
The legacy PCI interrupt is no longer supported for processor thermal
device on Lunar Lake. The support is via MSI.
Add feature PROC_THERMAL_FEATURE_MSI_SUPPORT to support MSI feature per
generation. Define this feature for Lunar Lake processors.
There are 4 MSI sources:
0 - Package thermal
1 - DDR Thermal
2 - Power floor interrupt
3 - Workload type hint
On interrupt check the source and call the corresponding handler. Here
don't need to call proc_thermal_check_wt_intr() and
proc_thermal_check_power_floor_intr to check if the interrupt is for
those sources as there is a dedicated MSI interrupt.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
---
.../processor_thermal_device.h | 1 +
.../processor_thermal_device_pci.c | 112 ++++++++++++++----
2 files changed, 90 insertions(+), 23 deletions(-)
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.h b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.h
index 674f3c85dfbc..d5eca6db2c00 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.h
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.h
@@ -65,6 +65,7 @@ struct rapl_mmio_regs {
#define PROC_THERMAL_FEATURE_DLVR 0x10
#define PROC_THERMAL_FEATURE_WT_HINT 0x20
#define PROC_THERMAL_FEATURE_POWER_FLOOR 0x40
+#define PROC_THERMAL_FEATURE_MSI_SUPPORT 0x80
#if IS_ENABLED(CONFIG_PROC_THERMAL_MMIO_RAPL)
int proc_thermal_rapl_add(struct pci_dev *pdev, struct proc_thermal_device *proc_priv);
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
index 59eb76d4dd81..8c6d19fe37c0 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
@@ -63,6 +63,18 @@ static struct proc_thermal_mmio_info proc_thermal_mmio_info[] = {
{ PROC_THERMAL_MMIO_INT_STATUS_1, 0x7200, 8, 0x01 },
};
+/* List of supported MSI IDs (sources) */
+enum proc_thermal_msi_ids {
+ PKG_THERMAL,
+ DDR_THERMAL,
+ THERM_POWER_FLOOR,
+ WORKLOAD_CHANGE,
+ MSI_THERMAL_MAX
+};
+
+/* Stores IRQ associated with a MSI ID */
+static int proc_thermal_msi_map[MSI_THERMAL_MAX];
+
#define B0D4_THERMAL_NOTIFY_DELAY 1000
static int notify_delay_ms = B0D4_THERMAL_NOTIFY_DELAY;
@@ -146,22 +158,41 @@ static irqreturn_t proc_thermal_irq_thread_handler(int irq, void *devid)
return IRQ_HANDLED;
}
+static int proc_thermal_match_msi_irq(int irq)
+{
+ int i;
+
+ if (!use_msi)
+ goto msi_fail;
+
+ for (i = 0; i < MSI_THERMAL_MAX; i++) {
+ if (proc_thermal_msi_map[i] == irq)
+ return i;
+ }
+
+msi_fail:
+ return -EOPNOTSUPP;
+}
+
static irqreturn_t proc_thermal_irq_handler(int irq, void *devid)
{
struct proc_thermal_pci *pci_info = devid;
struct proc_thermal_device *proc_priv;
- int ret = IRQ_NONE;
+ int ret = IRQ_NONE, msi_id;
u32 status;
proc_priv = pci_info->proc_priv;
+ msi_id = proc_thermal_match_msi_irq(irq);
+
if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_WT_HINT) {
- if (proc_thermal_check_wt_intr(pci_info->proc_priv))
+ if (msi_id == WORKLOAD_CHANGE || proc_thermal_check_wt_intr(pci_info->proc_priv))
ret = IRQ_WAKE_THREAD;
}
if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_POWER_FLOOR) {
- if (proc_thermal_check_power_floor_intr(pci_info->proc_priv))
+ if (msi_id == THERM_POWER_FLOOR ||
+ proc_thermal_check_power_floor_intr(pci_info->proc_priv))
ret = IRQ_WAKE_THREAD;
}
@@ -171,7 +202,7 @@ static irqreturn_t proc_thermal_irq_handler(int irq, void *devid)
* interrupt before scheduling work function for thermal threshold.
*/
proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_INT_STATUS_0, &status);
- if (status) {
+ if (msi_id == PKG_THERMAL || status) {
/* Disable enable interrupt flag */
proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_INT_ENABLE_0, 0);
pkg_thermal_schedule_work(&pci_info->work);
@@ -244,6 +275,45 @@ static struct thermal_zone_params tzone_params = {
.no_hwmon = true,
};
+static bool msi_irq;
+
+static int proc_thermal_setup_msi(struct pci_dev *pdev, struct proc_thermal_pci *pci_info)
+{
+ int ret, i, irq;
+
+ ret = pci_alloc_irq_vectors(pdev, 1, MSI_THERMAL_MAX, PCI_IRQ_MSI | PCI_IRQ_MSIX);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to allocate vectors!\n");
+ return ret;
+ }
+
+ dev_info(&pdev->dev, "msi enabled:%d msix enabled:%d\n", pdev->msi_enabled,
+ pdev->msix_enabled);
+
+ for (i = 0; i < MSI_THERMAL_MAX; i++) {
+ irq = pci_irq_vector(pdev, i);
+
+ ret = devm_request_threaded_irq(&pdev->dev, irq, proc_thermal_irq_handler,
+ proc_thermal_irq_thread_handler,
+ 0, KBUILD_MODNAME, pci_info);
+ if (ret) {
+ dev_err(&pdev->dev, "Request IRQ %d failed\n", irq);
+ goto err_free_msi_vectors;
+ }
+
+ proc_thermal_msi_map[i] = irq;
+ }
+
+ msi_irq = true;
+
+ return 0;
+
+err_free_msi_vectors:
+ pci_free_irq_vectors(pdev);
+
+ return ret;
+}
+
static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct proc_thermal_device *proc_priv;
@@ -253,7 +323,6 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_
.flags = THERMAL_TRIP_FLAG_RW_TEMP,
};
int irq_flag = 0, irq, ret;
- bool msi_irq = false;
proc_priv = devm_kzalloc(&pdev->dev, sizeof(*proc_priv), GFP_KERNEL);
if (!proc_priv)
@@ -299,27 +368,24 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_
goto err_del_legacy;
}
- if (use_msi && (pdev->msi_enabled || pdev->msix_enabled)) {
- /* request and enable interrupt */
- ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
- if (ret < 0) {
- dev_err(&pdev->dev, "Failed to allocate vectors!\n");
- goto err_ret_tzone;
- }
+ if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_MSI_SUPPORT)
+ use_msi = true;
- irq = pci_irq_vector(pdev, 0);
- msi_irq = true;
+ if (use_msi) {
+ ret = proc_thermal_setup_msi(pdev, pci_info);
+ if (ret)
+ goto err_ret_tzone;
} else {
irq_flag = IRQF_SHARED;
irq = pdev->irq;
- }
- ret = devm_request_threaded_irq(&pdev->dev, irq,
- proc_thermal_irq_handler, proc_thermal_irq_thread_handler,
- irq_flag, KBUILD_MODNAME, pci_info);
- if (ret) {
- dev_err(&pdev->dev, "Request IRQ %d failed\n", pdev->irq);
- goto err_free_vectors;
+ ret = devm_request_threaded_irq(&pdev->dev, irq, proc_thermal_irq_handler,
+ proc_thermal_irq_thread_handler, irq_flag,
+ KBUILD_MODNAME, pci_info);
+ if (ret) {
+ dev_err(&pdev->dev, "Request IRQ %d failed\n", pdev->irq);
+ goto err_ret_tzone;
+ }
}
ret = thermal_zone_device_enable(pci_info->tzone);
@@ -405,8 +471,8 @@ static SIMPLE_DEV_PM_OPS(proc_thermal_pci_pm, proc_thermal_pci_suspend,
static const struct pci_device_id proc_thermal_pci_ids[] = {
{ PCI_DEVICE_DATA(INTEL, ADL_THERMAL, PROC_THERMAL_FEATURE_RAPL |
PROC_THERMAL_FEATURE_FIVR | PROC_THERMAL_FEATURE_DVFS | PROC_THERMAL_FEATURE_WT_REQ) },
- { PCI_DEVICE_DATA(INTEL, LNLM_THERMAL, PROC_THERMAL_FEATURE_RAPL |
- PROC_THERMAL_FEATURE_DLVR) },
+ { PCI_DEVICE_DATA(INTEL, LNLM_THERMAL, PROC_THERMAL_FEATURE_MSI_SUPPORT |
+ PROC_THERMAL_FEATURE_RAPL | PROC_THERMAL_FEATURE_DLVR) },
{ PCI_DEVICE_DATA(INTEL, MTLP_THERMAL, PROC_THERMAL_FEATURE_RAPL |
PROC_THERMAL_FEATURE_FIVR | PROC_THERMAL_FEATURE_DVFS | PROC_THERMAL_FEATURE_DLVR |
PROC_THERMAL_FEATURE_WT_HINT | PROC_THERMAL_FEATURE_POWER_FLOOR) },
--
2.40.1
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