linux-dev/drivers/misc/habanalabs/gaudi2, branch master

treewide: use get_random_u32() when possible

2022-10-11T23:42:58Z

The prandom_u32() function has been a deprecated inline wrapper around get_random_u32() for several releases now, and compiles down to the exact same code. Replace the deprecated wrapper with a direct call to the real function. The same also applies to get_random_int(), which is just a wrapper around get_random_u32(). This was done as a basic find and replace. Reviewed-by: Greg Kroah-Hartman Reviewed-by: Kees Cook Reviewed-by: Yury Norov Reviewed-by: Jan Kara # for ext4 Acked-by: Toke Høiland-Jørgensen # for sch_cake Acked-by: Chuck Lever # for nfsd Acked-by: Jakub Kicinski Acked-by: Mika Westerberg # for thunderbolt Acked-by: Darrick J. Wong # for xfs Acked-by: Helge Deller # for parisc Acked-by: Heiko Carstens # for s390 Signed-off-by: Jason A. Donenfeld

habanalabs/gaudi2: allow user to flush PCIE by read

2022-09-19T12:10:01Z

In order for the user to flush PCIE he needs to read some register from PCIE block. The chosen register is SPECIAL_GLBL_SPARE_0 and hence needs to be unsecured. Signed-off-by: Ofir Bitton Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay

habanalabs/gaudi2: Remove unnecessary (void*) conversions

2022-09-19T12:08:40Z

The void pointer object can be directly assigned to different structure objects, it does not need to be cast. Signed-off-by: Li zeming Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay

habanalabs/gaudi2: add handling to pmmu events in eqe handler

2022-09-19T12:08:39Z

In order to get the error cause and the captured address in case of page fault, added pmmu events to eqe handler. Signed-off-by: Dani Liberman Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay

habanalabs/gaudi2: get f/w reset status register dynamically

2022-09-19T12:08:39Z

Get the firmware reset status address from the dynamic registers we read from the firmware instead of using a define. Signed-off-by: farah kassabri Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay

habanalabs/gaudi2: increase hard-reset sleep time to 2 sec

2022-09-19T12:08:39Z

The access to the device registers is blocked during hard reset, until preboot runs and allows the access to specific registers, including the PSOC BTM_FSM register which is used to know when the reset is done. Between the reset request and until this register is polled there is a small delay of 500 msec which is not enough for F/W to process the reset and for preboot to run, so the register might be accessed while it is blocked. To avoid it, increase the delay to 2 sec. Signed-off-by: Tomer Tayar Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay

habanalabs/gaudi2: print RAZWI info upon PCIe access error

2022-09-19T12:08:39Z

Add the dump of the RAZWI information when a PCIe access is blocked by RR. Signed-off-by: Tomer Tayar Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay

habanalabs: MMU invalidation h/w is per device

2022-09-19T12:08:39Z

The code used the mmu mutex to protect access to the context's page tables and invalidation of the MMU cache. Because pgt are per context, the mmu mutex was a member of the context object. The problem is that the device has a single MMU invalidation h/w (per MMU). Therefore, the mmu mutex should not be a property of the context but a property of the device. Signed-off-by: Oded Gabbay

habanalabs: new notifier events for device state

2022-09-19T12:08:38Z

Add new notifier events that inform several device states. General H/W error raised on device general H/W error occurs. User engine error is raised when a device engine informs of an error. Signed-off-by: Tal Cohen Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay

habanalabs/gaudi2: free event irq if init fails

2022-09-19T12:08:38Z

In case initialization fails after event irq was requested, we need to release that irq. Signed-off-by: Oded Gabbay