From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.ru (unknown [107.173.13.209]) by lists.ozlabs.org (Postfix) with ESMTP id 411c5g16tWzF333 for ; Thu, 7 Jun 2018 17:06:15 +1000 (AEST) From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy , Benjamin Herrenschmidt , Russell Currey , Alistair Popple , Balbir Singh Subject: [PATCH kernel] powerpc/ioda/npu2: Call hot reset skiboot hook when disabling NPU Date: Thu, 7 Jun 2018 17:06:07 +1000 Message-Id: <20180607070607.16037-1-aik@ozlabs.ru> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This brings NPU2 in a safe mode when it does not throw HMI if GPU coherent memory is gone. Signed-off-by: Alexey Kardashevskiy --- The main aim for this is nvlink2 pass through, helps a lot. --- arch/powerpc/platforms/powernv/pci-ioda.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 66c2804..29f798c 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -3797,6 +3797,16 @@ static void pnv_pci_release_device(struct pci_dev *pdev) pnv_ioda_release_pe(pe); } +void pnv_npu_disable_device(struct pci_dev *pdev) +{ + struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); + struct eeh_pe *eehpe = edev ? edev->pe : NULL; + + if (eehpe && eeh_ops && eeh_ops->reset) { + eeh_ops->reset(eehpe, EEH_RESET_HOT); + } +} + static void pnv_pci_ioda_shutdown(struct pci_controller *hose) { struct pnv_phb *phb = hose->private_data; @@ -3841,6 +3851,7 @@ static const struct pci_controller_ops pnv_npu_ioda_controller_ops = { .reset_secondary_bus = pnv_pci_reset_secondary_bus, .dma_set_mask = pnv_npu_dma_set_mask, .shutdown = pnv_pci_ioda_shutdown, + .disable_device = pnv_npu_disable_device, }; static const struct pci_controller_ops pnv_npu_ocapi_ioda_controller_ops = { -- 2.11.0