kernel/linux.git/drivers/crypto/ccp, branch v4.11.5

crypto: ccp - Change ISR handler method for a v5 CCP

2017-05-20T12:49:43+00:00

commit 6263b51eb3190d30351360fd168959af7e3a49a9 upstream. The CCP has the ability to perform several operations simultaneously, but only one interrupt. When implemented as a PCI device and using MSI-X/MSI interrupts, use a tasklet model to service interrupts. By disabling and enabling interrupts from the CCP, coupled with the queuing that tasklets provide, we can ensure that all events (occurring on the device) are recognized and serviced. This change fixes a problem wherein 2 or more busy queues can cause notification bits to change state while a (CCP) interrupt is being serviced, but after the queue state has been evaluated. This results in the event being 'lost' and the queue hanging, waiting to be serviced. Since the status bits are never fully de-asserted, the CCP never generates another interrupt (all bits zero -> one or more bits one), and no further CCP operations will be executed. Signed-off-by: Gary R Hook Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman

crypto: ccp - Change ISR handler method for a v3 CCP

2017-05-20T12:49:43+00:00

commit 7b537b24e76a1e8e6d7ea91483a45d5b1426809b upstream. The CCP has the ability to perform several operations simultaneously, but only one interrupt. When implemented as a PCI device and using MSI-X/MSI interrupts, use a tasklet model to service interrupts. By disabling and enabling interrupts from the CCP, coupled with the queuing that tasklets provide, we can ensure that all events (occurring on the device) are recognized and serviced. This change fixes a problem wherein 2 or more busy queues can cause notification bits to change state while a (CCP) interrupt is being serviced, but after the queue state has been evaluated. This results in the event being 'lost' and the queue hanging, waiting to be serviced. Since the status bits are never fully de-asserted, the CCP never generates another interrupt (all bits zero -> one or more bits one), and no further CCP operations will be executed. Signed-off-by: Gary R Hook Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman

crypto: ccp - Disable interrupts early on unload

2017-05-20T12:49:43+00:00

commit 116591fe3eef11c6f06b662c9176385f13891183 upstream. Ensure that we disable interrupts first when shutting down the driver. Signed-off-by: Gary R Hook Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman

crypto: ccp - Use only the relevant interrupt bits

2017-05-20T12:49:43+00:00

commit 56467cb11cf8ae4db9003f54b3d3425b5f07a10a upstream. Each CCP queue can product interrupts for 4 conditions: operation complete, queue empty, error, and queue stopped. This driver only works with completion and error events. Signed-off-by: Gary R Hook Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman

crypto: ccp - Make some CCP DMA channels private

2017-03-24T13:51:34+00:00

The CCP registers its queues as channels capable of handling general DMA operations. The NTB driver will use DMA if directed, but as public channels can be reserved for use in asynchronous operations some channels should be held back as private. Since the public/private determination is handled at a device level, reserve the "other" (secondary) CCP channels as private. Add a module parameter that allows for override, to be applied to all channels on all devices. CC: # 4.10.x- Signed-off-by: Gary R Hook Signed-off-by: Herbert Xu

crypto: ccp - Assign DMA commands to the channel's CCP

2017-03-16T09:43:08+00:00

The CCP driver generally uses a round-robin approach when assigning operations to available CCPs. For the DMA engine, however, the DMA mappings of the SGs are associated with a specific CCP. When an IOMMU is enabled, the IOMMU is programmed based on this specific device. If the DMA operations are not performed by that specific CCP then addressing errors and I/O page faults will occur. Update the CCP driver to allow a specific CCP device to be requested for an operation and use this in the DMA engine support. Cc: # 4.9.x- Signed-off-by: Gary R Hook Signed-off-by: Herbert Xu

crypto: ccp - Simplify some buffer management routines

2017-02-15T05:23:35+00:00

The reverse-get/set functions can be simplified by eliminating unused code. Signed-off-by: Gary R Hook Signed-off-by: Herbert Xu

crypto: ccp - Update the command queue on errors

2017-02-15T05:23:34+00:00

Move the command queue tail pointer when an error is detected. Always return the error. Signed-off-by: Gary R Hook Signed-off-by: Herbert Xu

crypto: ccp - Change mode for detailed CCP init messages

2017-02-15T05:23:34+00:00

The CCP initialization messages only need to be sent to syslog in debug mode. Signed-off-by: Gary R Hook Signed-off-by: Herbert Xu

crypto: ccp - Set the AES size field for all modes

2017-02-15T05:20:19+00:00

Ensure that the size field is correctly populated for all AES modes. Signed-off-by: Gary R Hook Signed-off-by: Herbert Xu