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hw_x86_64_muen: Extend sinfo API with device info

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The new Sinfo::get_dev_info function can be used to retrieve information
for a PCI device with given source-id (SID). The function returns false
if no device information for the specified device exists.
This commit is contained in:
Reto Buerki 2016-02-16 17:08:14 +01:00 committed by Christian Helmuth
parent 3350c6bf53
commit d137f0f2bf
3 changed files with 61 additions and 1 deletions
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17
repos/base-hw/src/core/include/spec/x86_64/muen/sinfo.h
View File

@ -58,6 +58,15 @@ class Genode::Sinfo
bool has_vector;
};
/* Structure holding information about PCI devices */
struct Dev_info {
uint16_t sid;
uint16_t irte_start;
uint8_t irq_start;
uint8_t ir_count;
bool msi_capable;
};
/*
* Check Muen sinfo Magic.
*/
@ -81,6 +90,14 @@ class Genode::Sinfo
static bool get_memregion_info(const char * const name,
struct Memregion_info *memregion);
/*
* Return information for PCI device with given SID.
*
* The function returns false if no device information for the
* specified device exists.
*/
static bool get_dev_info(const uint16_t sid, struct Dev_info *dev);
/*
* Channel callback.
*

15
repos/base-hw/src/core/spec/x86_64/muen/musinfo.h
View File

@ -42,18 +42,31 @@ struct resource_type {
char padding[6];
} __attribute__((packed, aligned (8)));
struct dev_info_type {
uint16_t sid;
uint16_t irte_start;
uint8_t irq_start;
uint8_t ir_count;
uint8_t flags;
char padding[1];
} __attribute__((packed, aligned (8)));
#define DEV_MSI_FLAG (1 << 0)
struct subject_info_type {
uint64_t magic;
uint8_t resource_count;
uint8_t memregion_count;
uint8_t channel_info_count;
char padding[5];
uint8_t dev_info_count;
char padding[4];
uint64_t tsc_khz;
uint64_t tsc_schedule_start;
uint64_t tsc_schedule_end;
struct resource_type resources[MAX_RESOURCE_COUNT];
struct memregion_type memregions[MAX_RESOURCE_COUNT];
struct channel_info_type channels_info[MAX_RESOURCE_COUNT];
struct dev_info_type dev_info[MAX_RESOURCE_COUNT];
} __attribute__((packed, aligned (8)));
#endif /* MUSINFO_H_ */

30
repos/base-hw/src/core/spec/x86_64/muen/sinfo.cc
View File

@ -116,6 +116,19 @@ static bool is_channel(const struct resource_type * const resource)
}
/* Fill dev struct with data from PCI device info given by index */
static void fill_dev_data(uint8_t idx, struct Genode::Sinfo::Dev_info *dev)
{
const struct dev_info_type dev_info = sinfo->dev_info[idx];
dev->sid = dev_info.sid;
dev->irte_start = dev_info.irte_start;
dev->irq_start = dev_info.irq_start;
dev->ir_count = dev_info.ir_count;
dev->msi_capable = dev_info.flags & DEV_MSI_FLAG;
}
Sinfo::Sinfo()
{
if (!check_magic()) {
@ -176,6 +189,23 @@ bool Sinfo::get_memregion_info(const char * const name,
}
bool Sinfo::get_dev_info(const uint16_t sid, struct Dev_info *dev)
{
int i;
if (!check_magic())
return false;
for (i = 0; i < sinfo->dev_info_count; i++) {
if (sinfo->dev_info[i].sid == sid) {
fill_dev_data(i, dev);
return true;
}
}
return false;
}
bool Sinfo::for_each_channel(Channel_cb func, void *data)
{
int i;