c5b309ff07
Main changes: - COW optimization for safecopy. - safemap, a grant-based interface for sharing memory regions between processes. - Integration with safemap and complete rework of DS, supporting new data types natively (labels, memory ranges, memory mapped ranges). - For further information: http://wiki.minix3.org/en/SummerOfCode2009/MemoryGrants Additional changes not included in the original Wu's branch: - Fixed unhandled case in VM when using COW optimization for safecopy in case of a block that has already been shared as SMAP. - Better interface and naming scheme for sys_saferevmap and ds_retrieve_map calls. - Better input checking in syslib: check for page alignment when creating memory mapping grants. - DS notifies subscribers when an entry is deleted. - Documented the behavior of indirect grants in case of memory mapping. - Test suite in /usr/src/test/safeperf|safecopy|safemap|ds/* reworked and extended. - Minor fixes and general cleanup. - TO-DO: Grant ids should be generated and managed the way endpoints are to make sure grant slots are never misreused.
56 lines
1.0 KiB
C
56 lines
1.0 KiB
C
/*
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pci_set_acl.c
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*/
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#include "pci.h"
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#include "syslib.h"
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#include <unistd.h>
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#include <minix/rs.h>
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#include <minix/ds.h>
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#include <minix/sysutil.h>
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/*===========================================================================*
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* pci_set_acl *
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*===========================================================================*/
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PUBLIC int pci_set_acl(rs_pci)
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struct rs_pci *rs_pci;
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{
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int r;
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cp_grant_id_t gid;
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message m;
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u32_t u32;
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if (pci_procnr == ANY)
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{
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r= ds_retrieve_label_num("pci", &u32);
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if (r != 0)
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{
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panic("syslib/" __FILE__,
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"pci_set_acl: ds_retrieve_label_num failed for 'pci'",
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r);
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}
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pci_procnr = u32;
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}
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gid= cpf_grant_direct(pci_procnr, (vir_bytes)rs_pci, sizeof(*rs_pci),
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CPF_READ);
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if (gid == -1)
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{
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printf("pci_set_acl: cpf_grant_direct failed: %d\n",
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errno);
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return EINVAL;
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}
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m.m_type= BUSC_PCI_SET_ACL;
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m.m1_i1= gid;
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r= sendrec(pci_procnr, &m);
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cpf_revoke(gid);
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if (r != 0)
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panic("syslib/" __FILE__, "pci_set_acl: can't talk to PCI", r);
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return m.m_type;
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}
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