On 11/22/24 4:30 PM, Fenghua Yu wrote: > When IDXD device hits hardware errors, it enters halt state and triggers > an interrupt to IDXD driver. Currently IDXD driver just prints an error > message in the interrupt handler. > > A better way to handle the interrupt is to do Function Level Reset (FLR) > and recover the device's hardware and software configurations to its > previous working state. The device and software can continue to run after > the interrupt. > > This series enables this FLR handling for IDXD device whose WQs are all > user type. FLR handling for IDXD device whose WQs are kernel type > will be implemented in a future series. Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx> For the series. > > Change log: > v2: > - Patch 3: Call a free helper to free all saved configs (Dave Jiang). > - Patch 3: Replace defined bitmap free function with existing > bitmpa_free(). > > v1: > https://lore.kernel.org/lkml/20240705181519.4067507-1-fenghua.yu@xxxxxxxxx/ > > Fenghua Yu (5): > dmaengine: idxd: Add idxd_pci_probe_alloc() helper > dmaengine: idxd: Binding and unbinding IDXD device and driver > dmaengine: idxd: Add idxd_device_config_save() and > idxd_device_config_restore() helpers > dmaengine: idxd: Refactor halt handler > dmaengine: idxd: Enable Function Level Reset (FLR) for halt > > drivers/dma/idxd/idxd.h | 13 ++ > drivers/dma/idxd/init.c | 479 ++++++++++++++++++++++++++++++++++++---- > drivers/dma/idxd/irq.c | 85 ++++--- > 3 files changed, 507 insertions(+), 70 deletions(-) >
