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| author | Florian Freudiger <25648113+FlorianFreudiger@users.noreply.github.com> | 2023-08-15 13:24:23 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-08-15 12:24:23 +0100 |
| commit | 1cca91aeb8ae8f531f9c3b9c59d83630e9941a5e (patch) | |
| tree | a0b700608a3f29be7cc8cb14060eb2b703edf59c /include | |
| parent | 852ca25f41bf7be8a6a2a8b30c0e2374c10b480e (diff) | |
| download | libvfio-user-1cca91aeb8ae8f531f9c3b9c59d83630e9941a5e.zip libvfio-user-1cca91aeb8ae8f531f9c3b9c59d83630e9941a5e.tar.gz libvfio-user-1cca91aeb8ae8f531f9c3b9c59d83630e9941a5e.tar.bz2 | |
Allow adding MSI capability via vfu_pci_add_capability (#758)
Signed-off-by: Florian Freudiger <25648113+FlorianFreudiger@users.noreply.github.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/libvfio-user.h | 1 | ||||
| -rw-r--r-- | include/pci_caps/msi.h | 33 |
2 files changed, 20 insertions, 14 deletions
diff --git a/include/libvfio-user.h b/include/libvfio-user.h index 7cd28b5..72369b6 100644 --- a/include/libvfio-user.h +++ b/include/libvfio-user.h @@ -981,6 +981,7 @@ vfu_pci_get_config_space(vfu_ctx_t *vfu_ctx); * Certain standard capabilities are handled entirely within the library: * * PCI_CAP_ID_EXP (pxcap) + * PCI_CAP_ID_MSI (msicap) * PCI_CAP_ID_MSIX (msixcap) * PCI_CAP_ID_PM (pmcap) * diff --git a/include/pci_caps/msi.h b/include/pci_caps/msi.h index c148c9e..481abee 100644 --- a/include/pci_caps/msi.h +++ b/include/pci_caps/msi.h @@ -39,33 +39,38 @@ extern "C" { #endif +/* Message Control for MSI */ struct mc { - unsigned int msie:1; - unsigned int mmc:3; - unsigned int mme:3; - unsigned int c64:1; - unsigned int pvm:1; - unsigned int res1:7; + unsigned int msie:1; /* RW */ + unsigned int mmc:3; /* RO */ + unsigned int mme:3; /* RW */ + unsigned int c64:1; /* RO */ + unsigned int pvm:1; /* RO */ + unsigned int res1:7; /* not implemented, extended message data control */ } __attribute__ ((packed)); _Static_assert(sizeof(struct mc) == 0x2, "bad MC size"); +/* Message Address for MSI */ struct ma { - unsigned int res1:2; - unsigned int addr:30; + unsigned int res1:2; /* read must return 0, write has no effect */ + unsigned int addr:30; /* RW */ } __attribute__ ((packed)); _Static_assert(sizeof(struct ma) == 0x4, "bad MA size"); +#define VFIO_USER_PCI_CAP_MSI_SIZEOF (0x18) + struct msicap { struct cap_hdr hdr; struct mc mc; struct ma ma; - uint32_t mua; - uint16_t md; - uint16_t padding; - uint32_t mmask; - uint32_t mpend; + uint32_t mua; /* RW */ + uint16_t md; /* RW */ + uint16_t padding; /* not implemented, extended message data */ + uint32_t mmask; /* RW */ + uint32_t mpend; /* RO */ } __attribute__ ((packed)); -_Static_assert(sizeof(struct msicap) == 0x18, "bad MSICAP size"); +_Static_assert(sizeof(struct msicap) == VFIO_USER_PCI_CAP_MSI_SIZEOF, + "bad MSICAP size"); _Static_assert(offsetof(struct msicap, hdr) == 0, "bad offset"); #ifdef __cplusplus |