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ofnet: move the allocation of the transmit buffer into a function

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In the current code search_net_devices() uses the "alloc-mem" command
from the IEEE1275 User Interface for allocation of the transmit buffer
for the case when GRUB_IEEE1275_FLAG_VIRT_TO_REAL_BROKEN is set.

I don't have hardware where this flag is set to verify if this
workaround is still needed. However, further changes to ofnet will
require to execute this workaround one more time. Therefore, to
avoid possible duplication of code I'm moving this piece of
code into a function.

Signed-off-by: Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Stanislav Kholmanskikh 2016-12-12 18:03:38 +03:00 committed by Daniel Kiper
parent 0d2345774d
commit 7b4c54c4ad
1 changed files with 43 additions and 26 deletions
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69
grub-core/net/drivers/ieee1275/ofnet.c
View file

@ -294,6 +294,48 @@ grub_ieee1275_net_config_real (const char *devpath, char **device, char **path,
}
}
/* Allocate memory with alloc-mem */
static void *
grub_ieee1275_alloc_mem (grub_size_t len)
{
struct alloc_args
{
struct grub_ieee1275_common_hdr common;
grub_ieee1275_cell_t method;
grub_ieee1275_cell_t len;
grub_ieee1275_cell_t catch;
grub_ieee1275_cell_t result;
}
args;
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_CANNOT_INTERPRET))
{
grub_error (GRUB_ERR_UNKNOWN_COMMAND, N_("interpret is not supported"));
return NULL;
}
INIT_IEEE1275_COMMON (&args.common, "interpret", 2, 2);
args.len = len;
args.method = (grub_ieee1275_cell_t) "alloc-mem";
if (IEEE1275_CALL_ENTRY_FN (&args) == -1 || args.catch)
{
grub_error (GRUB_ERR_INVALID_COMMAND, N_("alloc-mem failed"));
return NULL;
}
else
return (void *)args.result;
}
static void *
ofnet_alloc_netbuf (grub_size_t len)
{
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_VIRT_TO_REAL_BROKEN))
return grub_ieee1275_alloc_mem (len);
else
return grub_zalloc (len);
}
static int
search_net_devices (struct grub_ieee1275_devalias *alias)
{
@ -410,32 +452,7 @@ search_net_devices (struct grub_ieee1275_devalias *alias)
card->txbufsize = ALIGN_UP (card->mtu, 64) + 256;
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_VIRT_TO_REAL_BROKEN))
{
struct alloc_args
{
struct grub_ieee1275_common_hdr common;
grub_ieee1275_cell_t method;
grub_ieee1275_cell_t len;
grub_ieee1275_cell_t catch;
grub_ieee1275_cell_t result;
}
args;
INIT_IEEE1275_COMMON (&args.common, "interpret", 2, 2);
args.len = card->txbufsize;
args.method = (grub_ieee1275_cell_t) "alloc-mem";
if (IEEE1275_CALL_ENTRY_FN (&args) == -1
|| args.catch)
{
card->txbuf = 0;
grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
}
else
card->txbuf = (void *) args.result;
}
else
card->txbuf = grub_zalloc (card->txbufsize);
card->txbuf = ofnet_alloc_netbuf (card->txbufsize);
if (!card->txbuf)
{
grub_free (ofdata->path);