Differential D24066 Diff 70138 usr.sbin/bhyve/pci_emul.c

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usr.sbin/bhyve/pci_emul.c

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	/*			/*
	* Register (or unregister) the MMIO or I/O region associated with the BAR			* Register (or unregister) the MMIO or I/O region associated with the BAR
	* register 'idx' of an emulated pci device.			* register 'idx' of an emulated pci device.
	*/			*/
	static void			static void
	modify_bar_registration(struct pci_devinst *pi, int idx, int registration)			modify_bar_registration(struct pci_devinst *pi, int idx, int registration)
	{			{
				struct pci_devemu *pe;
	int error;			int error;
	struct inout_port iop;			struct inout_port iop;
	struct mem_range mr;			struct mem_range mr;

				pe = pi->pi_d;
	switch (pi->pi_bar[idx].type) {			switch (pi->pi_bar[idx].type) {
	case PCIBAR_IO:			case PCIBAR_IO:
	bzero(&iop, sizeof(struct inout_port));			bzero(&iop, sizeof(struct inout_port));
	iop.name = pi->pi_name;			iop.name = pi->pi_name;
	iop.port = pi->pi_bar[idx].addr;			iop.port = pi->pi_bar[idx].addr;
	iop.size = pi->pi_bar[idx].size;			iop.size = pi->pi_bar[idx].size;
	if (registration) {			if (registration) {
	iop.flags = IOPORT_F_INOUT;			iop.flags = IOPORT_F_INOUT;
	iop.handler = pci_emul_io_handler;			iop.handler = pci_emul_io_handler;
	iop.arg = pi;			iop.arg = pi;
	error = register_inout(&iop);			error = register_inout(&iop);
	} else			} else
	error = unregister_inout(&iop);			error = unregister_inout(&iop);
				if (pe->pe_baraddr != NULL)
				bzUnsubmitted Not Done Inline Actions Can someone explain to me what happens here in case register/unregister_inout have returned an error? (same below for _mem). bz: Can someone explain to me what happens here in case register/unregister_inout have returned an…
				(*pe->pe_baraddr)(pi->pi_vmctx, pi, idx, registration,
				pi->pi_bar[idx].addr);
	break;			break;
	case PCIBAR_MEM32:			case PCIBAR_MEM32:
	case PCIBAR_MEM64:			case PCIBAR_MEM64:
	bzero(&mr, sizeof(struct mem_range));			bzero(&mr, sizeof(struct mem_range));
	mr.name = pi->pi_name;			mr.name = pi->pi_name;
	mr.base = pi->pi_bar[idx].addr;			mr.base = pi->pi_bar[idx].addr;
	mr.size = pi->pi_bar[idx].size;			mr.size = pi->pi_bar[idx].size;
	if (registration) {			if (registration) {
	mr.flags = MEM_F_RW;			mr.flags = MEM_F_RW;
	mr.handler = pci_emul_mem_handler;			mr.handler = pci_emul_mem_handler;
	mr.arg1 = pi;			mr.arg1 = pi;
	mr.arg2 = idx;			mr.arg2 = idx;
	error = register_mem(&mr);			error = register_mem(&mr);
	} else			} else
	error = unregister_mem(&mr);			error = unregister_mem(&mr);
				if (pe->pe_baraddr != NULL)
				(*pe->pe_baraddr)(pi->pi_vmctx, pi, idx, registration,
				pi->pi_bar[idx].addr);
	break;			break;
	default:			default:
	error = EINVAL;			error = EINVAL;
	break;			break;
	}			}
	assert(error == 0);			assert(error == 0);
	}			}

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