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f6b1c44d1f
Add two new arguments to bus_dma_tag_create(): lockfunc and lockfuncarg. Lockfunc allows a driver to provide a function for managing its locking semantics while using busdma. At the moment, this is used for the asynchronous busdma_swi and callback mechanism. Two lockfunc implementations are provided: busdma_lock_mutex() performs standard mutex operations on the mutex that is specified from lockfuncarg. dftl_lock() is a panic implementation and is defaulted to when NULL, NULL are passed to bus_dma_tag_create(). The only time that NULL, NULL should ever be used is when the driver ensures that bus_dmamap_load() will not be deferred. Drivers that do not provide their own locking can pass busdma_lock_mutex,&Giant args in order to preserve the former behaviour. sparc64 and powerpc do not provide real busdma_swi functions, so this is largely a noop on those platforms. The busdma_swi on is64 is not properly locked yet, so warnings will be emitted on this platform when busdma callback deferrals happen. If anyone gets panics or warnings from dflt_lock() being called, please let me know right away. Reviewed by: tmm, gibbs |
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agp_ali.c | ||
agp_amd.c | ||
agp_i810.c | ||
agp_if.m | ||
agp_intel.c | ||
agp_sis.c | ||
agp_via.c | ||
agp.c | ||
agppriv.h | ||
agpreg.h | ||
agpvar.h | ||
alpm.c | ||
amdpm.c | ||
cy_pci.c | ||
dc21040reg.h | ||
if_dc.c | ||
if_dcreg.h | ||
if_de.c | ||
if_devar.h | ||
if_mn.c | ||
if_pcn.c | ||
if_pcnreg.h | ||
if_rl.c | ||
if_rlreg.h | ||
if_sf.c | ||
if_sfreg.h | ||
if_sis.c | ||
if_sisreg.h | ||
if_sk.c | ||
if_skreg.h | ||
if_ste.c | ||
if_stereg.h | ||
if_ti.c | ||
if_tireg.h | ||
if_tl.c | ||
if_tlreg.h | ||
if_vr.c | ||
if_vrreg.h | ||
if_wb.c | ||
if_wbreg.h | ||
if_xl.c | ||
if_xlreg.h | ||
intpm.c | ||
intpmreg.h | ||
locate.pl | ||
meteor_reg.h | ||
meteor.c | ||
ncr.c | ||
ncrreg.h | ||
ti_fw2.h | ||
ti_fw.h | ||
viapm.c | ||
xmaciireg.h | ||
xrpu.c |