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libqos/ahci: add ahci_io

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ahci_io is a wrapper around ahci_guest_io that takes a pointer to host
memory instead, and will create a guest memory buffer and copy the data
to/from as needed and as appropriate for a read/write command, such that
after a read, the guest data will be in a host buffer, and for a write,
the data will be transmitted to guest memory prior to the block operation.

Now that we have all the syntactic sugar functions in place for AHCI,
we can convert the identify test to be very, very short.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1423158090-25580-17-git-send-email-jsnow@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
John Snow 2015-02-05 12:41:27 -05:00 • committed by Stefan Hajnoczi
parent 113221956c
commit ae02962017
3 changed files with 52 additions and 38 deletions
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25
tests/libqos/ahci.c
View file

@ -592,6 +592,31 @@ static AHCICommandProp *ahci_command_find(uint8_t command_name)
return NULL;
}
/* Given a HOST buffer, create a buffer address and perform an IO operation. */
void ahci_io(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
void *buffer, size_t bufsize)
{
uint64_t ptr;
AHCICommandProp *props;
props = ahci_command_find(ide_cmd);
g_assert(props);
ptr = ahci_alloc(ahci, bufsize);
g_assert(ptr);
if (props->write) {
memwrite(ptr, buffer, bufsize);
}
ahci_guest_io(ahci, port, ide_cmd, ptr, bufsize);
if (props->read) {
memread(ptr, buffer, bufsize);
}
ahci_free(ahci, ptr);
}
/**
* Initializes a basic command header in memory.
* We assume that this is for an ATA command using RegH2DFIS.

2
tests/libqos/ahci.h
View file

@ -523,6 +523,8 @@ unsigned ahci_pick_cmd(AHCIQState *ahci, uint8_t port);
unsigned size_to_prdtl(unsigned bytes, unsigned bytes_per_prd);
void ahci_guest_io(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
uint64_t gbuffer, size_t size);
void ahci_io(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
void *buffer, size_t bufsize);
/* Command Lifecycle */
AHCICommand *ahci_command_create(uint8_t command_name);