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254e4e5b77
When a DMA request using bounce pages completes, a swi is triggered to schedule pending DMA requests using the just-freed bounce pages. For a long time this bus_dma swi has been tied to a "virtual memory" swi (swi_vm). However, all of the swi_vm implementations are the same and consist of checking a flag (busdma_swi_pending) which is always true and if set calling busdma_swi. I suspect this dates back to the pre-SMPng days and that the intention was for swi_vm to serve as a mux. However, in the current scheme there's no need for the mux. Instead, remove swi_vm and vm_ih. Each bus_dma implementation that uses bounce pages is responsible for creating its own swi (busdma_ih) which it now schedules directly. This swi invokes busdma_swi directly removing the need for busdma_swi_pending. One consequence is that the swi now works on RISC-V which had previously failed to invoke busdma_swi from swi_vm. Reviewed by: imp, kib Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D33447 |
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| .. | ||
| _align.h | ||
| _bus.h | ||
| _inttypes.h | ||
| _limits.h | ||
| _stdint.h | ||
| _types.h | ||
| altivec.h | ||
| asm.h | ||
| atomic.h | ||
| bat.h | ||
| bus.h | ||
| bus_dma.h | ||
| clock.h | ||
| counter.h | ||
| cpu.h | ||
| cpufunc.h | ||
| db_machdep.h | ||
| dbdma.h | ||
| dump.h | ||
| efi.h | ||
| elf.h | ||
| endian.h | ||
| exec.h | ||
| float.h | ||
| floatingpoint.h | ||
| fpu.h | ||
| frame.h | ||
| gdb_machdep.h | ||
| hid.h | ||
| ieee.h | ||
| ieeefp.h | ||
| ifunc.h | ||
| in_cksum.h | ||
| intr_machdep.h | ||
| kdb.h | ||
| limits.h | ||
| machdep.h | ||
| md_var.h | ||
| memdev.h | ||
| metadata.h | ||
| minidump.h | ||
| mmuvar.h | ||
| ofw_machdep.h | ||
| openpicreg.h | ||
| openpicvar.h | ||
| param.h | ||
| pcb.h | ||
| pcpu.h | ||
| pcpu_aux.h | ||
| pio.h | ||
| platform.h | ||
| platformvar.h | ||
| pmap.h | ||
| pmc_mdep.h | ||
| proc.h | ||
| procctl.h | ||
| profile.h | ||
| psl.h | ||
| pte.h | ||
| ptrace.h | ||
| reg.h | ||
| reloc.h | ||
| resource.h | ||
| rtas.h | ||
| runq.h | ||
| sc_machdep.h | ||
| setjmp.h | ||
| sigframe.h | ||
| signal.h | ||
| slb.h | ||
| smp.h | ||
| spr.h | ||
| sr.h | ||
| stack.h | ||
| stdarg.h | ||
| sysarch.h | ||
| tlb.h | ||
| tls.h | ||
| trap.h | ||
| ucontext.h | ||
| vdso.h | ||
| vm.h | ||
| vmparam.h | ||