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drivers/ipmi: Fix multiple issues 

* Set abort command define
* Set debug level to SPEW
* Support zero length data packet in ipmi_kcs_send_message
  That's required for commands like GET_DEVICE_ID, which have no
  additional data to send.
* Read reply even if given no receive buffer
* Prevent buffer overflow in read reply processing

Tested on Wedge100s.

Change-Id: Iefddd88a744c3b96751d3fe8c2951ca2115548ce
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33488
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Patrick Rudolph 2019-06-14 18:48:13 +02:00 committed by Patrick Rudolph
parent 913d8b5e45
commit db43afa836
1 changed files with 45 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

74
src/drivers/ipmi/ipmi_kcs.c
View File

@ -22,7 +22,7 @@
#define IPMI_KCS_STATE(_x) ((_x) >> 6)
#define IPMI_KCS_GET_STATUS_ABORT
#define IPMI_KCS_GET_STATUS_ABORT 0x60
#define IPMI_KCS_START_WRITE 0x61
#define IPMI_KCS_END_WRITE 0x62
#define IPMI_KCS_READ_BYTE 0x68
@ -43,7 +43,7 @@
static unsigned char ipmi_kcs_status(int port)
{
unsigned char status = inb(IPMI_STAT(port));
printk(BIOS_DEBUG, "%s: 0x%02x\n", __func__, status);
printk(BIOS_SPEW, "%s: 0x%02x\n", __func__, status);
return status;
}
@ -77,7 +77,7 @@ static int ipmi_kcs_send_data_byte(int port, const unsigned char byte)
{
unsigned char status;
printk(BIOS_DEBUG, "%s: %02x\n", __func__, byte);
printk(BIOS_SPEW, "%s: 0x%02x\n", __func__, byte);
outb(byte, IPMI_DATA(port));
@ -100,7 +100,7 @@ static int ipmi_kcs_send_last_data_byte(int port, const unsigned char byte)
{
unsigned char status;
printk(BIOS_DEBUG, "%s: %02x\n", __func__, byte);
printk(BIOS_SPEW, "%s: 0x%02x\n", __func__, byte);
if (wait_ibf_timeout(port))
return 1;
@ -121,7 +121,7 @@ static int ipmi_kcs_send_last_data_byte(int port, const unsigned char byte)
static int ipmi_kcs_send_cmd_byte(int port, const unsigned char byte)
{
printk(BIOS_DEBUG, "%s: 0x%02x\n", __func__, byte);
printk(BIOS_SPEW, "%s: 0x%02x\n", __func__, byte);
if (wait_ibf_timeout(port))
return 1;
@ -156,31 +156,47 @@ static int ipmi_kcs_send_message(int port, int netfn, int lun, int cmd,
return ret;
}
ret = ipmi_kcs_send_data_byte(port, cmd);
if (ret) {
printk(BIOS_ERR, "IPMI CMD failed\n");
return ret;
}
if (!len) {
ret = ipmi_kcs_send_cmd_byte(port, IPMI_KCS_END_WRITE);
if (ret) {
printk(BIOS_ERR, "IPMI END WRITE failed\n");
return ret;
}
while (len-- > 1) {
ret = ipmi_kcs_send_data_byte(port, *msg++);
ret = ipmi_kcs_send_last_data_byte(port, cmd);
if (ret) {
printk(BIOS_ERR, "IPMI BYTE WRITE failed\n");
return ret;
}
} else {
ret = ipmi_kcs_send_data_byte(port, cmd);
if (ret) {
printk(BIOS_ERR, "IPMI CMD failed\n");
return ret;
}
while (len > 1) {
ret = ipmi_kcs_send_data_byte(port, *msg++);
if (ret) {
printk(BIOS_ERR, "IPMI BYTE WRITE failed\n");
return ret;
}
len--;
}
ret = ipmi_kcs_send_cmd_byte(port, IPMI_KCS_END_WRITE);
if (ret) {
printk(BIOS_ERR, "IPMI END WRITE failed\n");
return ret;
}
ret = ipmi_kcs_send_last_data_byte(port, *msg);
if (ret) {
printk(BIOS_ERR, "IPMI BYTE WRITE failed\n");
return ret;
}
}
ret = ipmi_kcs_send_cmd_byte(port, IPMI_KCS_END_WRITE);
if (ret) {
printk(BIOS_ERR, "IPMI END WRITE failed\n");
return ret;
}
ret = ipmi_kcs_send_last_data_byte(port, *msg++);
if (ret) {
printk(BIOS_ERR, "IPMI BYTE WRITE failed\n");
return ret;
}
return 0;
}
@ -188,9 +204,6 @@ static int ipmi_kcs_read_message(int port, unsigned char *msg, int len)
{
int status, ret = 0;
if (!msg)
return 0;
if (wait_ibf_timeout(port))
return 1;
@ -201,15 +214,18 @@ static int ipmi_kcs_read_message(int port, unsigned char *msg, int len)
return ret;
if (IPMI_KCS_STATE(status) != IPMI_KCS_STATE_READ) {
printk(BIOS_ERR, "%s: wrong state: 0x%02x\n", __func__, status);
printk(BIOS_ERR, "%s: wrong state: 0x%02x\n", __func__,
status);
return -1;
}
if (wait_obf_timeout(port))
return -1;
*msg++ = inb(IPMI_DATA(port));
ret++;
if (msg && (ret < len)) {
*msg++ = inb(IPMI_DATA(port));
ret++;
}
if (wait_ibf_timeout(port))
return -1;