In some versions of Intel TH, the Software Trace Hub (STH) has a second MMIO BAR dedicated to the input from Intel PT. This calls for a new subdevice that will be enumerated if the corresponding BAR is present.
Signed-off-by: Alexander Shishkin <[email protected]> --- drivers/hwtracing/intel_th/core.c | 18 ++++++++++++++++++ drivers/hwtracing/intel_th/intel_th.h | 1 + drivers/hwtracing/intel_th/pci.c | 11 ++++++++--- 3 files changed, 27 insertions(+), 3 deletions(-) diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c index 8c221e1ed12d..a0b8b0182daa 100644 --- a/drivers/hwtracing/intel_th/core.c +++ b/drivers/hwtracing/intel_th/core.c @@ -500,6 +500,24 @@ static const struct intel_th_subdevice { .name = "sth", .type = INTEL_TH_SOURCE, }, + { + .nres = 2, + .res = { + { + .start = REG_STH_OFFSET, + .end = REG_STH_OFFSET + REG_STH_LENGTH - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = TH_MMIO_RTIT, + .end = 0, + .flags = IORESOURCE_MEM, + }, + }, + .id = -1, + .name = "rtit", + .type = INTEL_TH_SOURCE, + }, { .nres = 1, .res = { diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h index 8c90c8d01867..3fca86d78fdd 100644 --- a/drivers/hwtracing/intel_th/intel_th.h +++ b/drivers/hwtracing/intel_th/intel_th.h @@ -228,6 +228,7 @@ int intel_th_output_enable(struct intel_th *th, unsigned int otype); enum th_mmio_idx { TH_MMIO_CONFIG = 0, TH_MMIO_SW = 1, + TH_MMIO_RTIT = 2, TH_MMIO_END, }; diff --git a/drivers/hwtracing/intel_th/pci.c b/drivers/hwtracing/intel_th/pci.c index 9dd2d75bd539..fd8267bbaf2c 100644 --- a/drivers/hwtracing/intel_th/pci.c +++ b/drivers/hwtracing/intel_th/pci.c @@ -20,6 +20,7 @@ enum { TH_PCI_CONFIG_BAR = 0, TH_PCI_STH_SW_BAR = 2, + TH_PCI_RTIT_BAR = 4, }; #define BAR_MASK (BIT(TH_PCI_CONFIG_BAR) | BIT(TH_PCI_STH_SW_BAR)) @@ -75,8 +76,8 @@ static int intel_th_pci_probe(struct pci_dev *pdev, [TH_MMIO_CONFIG] = pdev->resource[TH_PCI_CONFIG_BAR], [TH_MMIO_SW] = pdev->resource[TH_PCI_STH_SW_BAR], }; + int err, r = TH_MMIO_SW + 1; struct intel_th *th; - int err; err = pcim_enable_device(pdev); if (err) @@ -86,8 +87,12 @@ static int intel_th_pci_probe(struct pci_dev *pdev, if (err) return err; - th = intel_th_alloc(&pdev->dev, drvdata, resource, TH_MMIO_END, - pdev->irq); + if (pdev->resource[TH_PCI_RTIT_BAR].start) { + resource[TH_MMIO_RTIT] = pdev->resource[TH_PCI_RTIT_BAR]; + r++; + } + + th = intel_th_alloc(&pdev->dev, drvdata, resource, r, pdev->irq); if (IS_ERR(th)) return PTR_ERR(th); -- 2.20.1
