From: Suganath Prabu S suganath-prabu.subramani@broadcom.com

Problem Statement: Sending I/O through 32 bit descriptors to Ventura series of controller results in IO timeout on certain conditions.

This error only occurs on systems with high I/O activity on Ventura series controllers.

Changes in this patch will prevent driver from using 32 bit descriptor and use 64 bit Descriptors.

Cc: stable@vger.kernel.org Signed-off-by: Suganath Prabu S suganath-prabu.subramani@broadcom.com Signed-off-by: Shivasharan S shivasharan.srikanteshwara@broadcom.com --- drivers/scsi/mpt3sas/mpt3sas_base.c | 121 ------------------------------------ drivers/scsi/mpt3sas/mpt3sas_base.h | 1 - 2 files changed, 122 deletions(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index 13d6e4e..6051469 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -3108,116 +3108,6 @@ _base_put_smid_default(struct MPT3SAS_ADAPTER *ioc, u16 smid) }

/** -* _base_put_smid_scsi_io_atomic - send SCSI_IO request to firmware using -* Atomic Request Descriptor -* @ioc: per adapter object -* @smid: system request message index -* @handle: device handle, unused in this function, for function type match -* -* Return nothing. -*/ -static void -_base_put_smid_scsi_io_atomic(struct MPT3SAS_ADAPTER *ioc, u16 smid, - u16 handle) -{ - Mpi26AtomicRequestDescriptor_t descriptor; - u32 *request = (u32 *)&descriptor; - - descriptor.RequestFlags = MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO; - descriptor.MSIxIndex = _base_get_msix_index(ioc); - descriptor.SMID = cpu_to_le16(smid); - - writel(cpu_to_le32(*request), &ioc->chip->AtomicRequestDescriptorPost); -} - -/** - * _base_put_smid_fast_path_atomic - send fast path request to firmware - * using Atomic Request Descriptor - * @ioc: per adapter object - * @smid: system request message index - * @handle: device handle, unused in this function, for function type match - * Return nothing - */ -static void -_base_put_smid_fast_path_atomic(struct MPT3SAS_ADAPTER *ioc, u16 smid, - u16 handle) -{ - Mpi26AtomicRequestDescriptor_t descriptor; - u32 *request = (u32 *)&descriptor; - - descriptor.RequestFlags = MPI25_REQ_DESCRIPT_FLAGS_FAST_PATH_SCSI_IO; - descriptor.MSIxIndex = _base_get_msix_index(ioc); - descriptor.SMID = cpu_to_le16(smid); - - writel(cpu_to_le32(*request), &ioc->chip->AtomicRequestDescriptorPost); -} - -/** - * _base_put_smid_hi_priority_atomic - send Task Management request to - * firmware using Atomic Request Descriptor - * @ioc: per adapter object - * @smid: system request message index - * @msix_task: msix_task will be same as msix of IO incase of task abort else 0 - * - * Return nothing. - */ -static void -_base_put_smid_hi_priority_atomic(struct MPT3SAS_ADAPTER *ioc, u16 smid, - u16 msix_task) -{ - Mpi26AtomicRequestDescriptor_t descriptor; - u32 *request = (u32 *)&descriptor; - - descriptor.RequestFlags = MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY; - descriptor.MSIxIndex = msix_task; - descriptor.SMID = cpu_to_le16(smid); - - writel(cpu_to_le32(*request), &ioc->chip->AtomicRequestDescriptorPost); -} - -/** - * _base_put_smid_nvme_encap_atomic - send NVMe encapsulated request to - * firmware using Atomic Request Descriptor - * @ioc: per adapter object - * @smid: system request message index - * - * Return nothing. - */ -static void -_base_put_smid_nvme_encap_atomic(struct MPT3SAS_ADAPTER *ioc, u16 smid) -{ - Mpi26AtomicRequestDescriptor_t descriptor; - u32 *request = (u32 *)&descriptor; - - descriptor.RequestFlags = MPI26_REQ_DESCRIPT_FLAGS_PCIE_ENCAPSULATED; - descriptor.MSIxIndex = _base_get_msix_index(ioc); - descriptor.SMID = cpu_to_le16(smid); - - writel(cpu_to_le32(*request), &ioc->chip->AtomicRequestDescriptorPost); -} - -/** - * _base_put_smid_default - Default, primarily used for config pages - * use Atomic Request Descriptor - * @ioc: per adapter object - * @smid: system request message index - * - * Return nothing. - */ -static void -_base_put_smid_default_atomic(struct MPT3SAS_ADAPTER *ioc, u16 smid) -{ - Mpi26AtomicRequestDescriptor_t descriptor; - u32 *request = (u32 *)&descriptor; - - descriptor.RequestFlags = MPI2_REQ_DESCRIPT_FLAGS_DEFAULT_TYPE; - descriptor.MSIxIndex = _base_get_msix_index(ioc); - descriptor.SMID = cpu_to_le16(smid); - - writel(cpu_to_le32(*request), &ioc->chip->AtomicRequestDescriptorPost); -} - -/** * _base_display_OEMs_branding - Display branding string * @ioc: per adapter object * @@ -5071,8 +4961,6 @@ _base_get_ioc_facts(struct MPT3SAS_ADAPTER *ioc) if ((facts->IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_RDPQ_ARRAY_CAPABLE) && (!reset_devices)) ioc->rdpq_array_capable = 1; - if (facts->IOCCapabilities & MPI26_IOCFACTS_CAPABILITY_ATOMIC_REQ) - ioc->atomic_desc_capable = 1; facts->FWVersion.Word = le32_to_cpu(mpi_reply.FWVersion.Word); facts->IOCRequestFrameSize = le16_to_cpu(mpi_reply.IOCRequestFrameSize); @@ -6006,20 +5894,11 @@ mpt3sas_base_attach(struct MPT3SAS_ADAPTER *ioc) break; }

- if (ioc->atomic_desc_capable) { - ioc->put_smid_default = &_base_put_smid_default_atomic; - ioc->put_smid_scsi_io = &_base_put_smid_scsi_io_atomic; - ioc->put_smid_fast_path = &_base_put_smid_fast_path_atomic; - ioc->put_smid_hi_priority = &_base_put_smid_hi_priority_atomic; - ioc->put_smid_nvme_encap = &_base_put_smid_nvme_encap_atomic; - } else { ioc->put_smid_default = &_base_put_smid_default; ioc->put_smid_scsi_io = &_base_put_smid_scsi_io; ioc->put_smid_fast_path = &_base_put_smid_fast_path; ioc->put_smid_hi_priority = &_base_put_smid_hi_priority; ioc->put_smid_nvme_encap = &_base_put_smid_nvme_encap; - } -

/* * These function pointers for other requests that don't diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h index 789bc42..3324392 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.h +++ b/drivers/scsi/mpt3sas/mpt3sas_base.h @@ -1348,7 +1348,6 @@ struct MPT3SAS_ADAPTER { void *device_remove_in_progress; u16 device_remove_in_progress_sz; u8 is_gen35_ioc; - u8 atomic_desc_capable; PUT_SMID_IO_FP_HIP put_smid_scsi_io; PUT_SMID_IO_FP_HIP put_smid_fast_path; PUT_SMID_IO_FP_HIP put_smid_hi_priority;