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cdx: Replace custom mcdi logging with print_hex_dump_debug() 

Replace custom mcdi logging for send and receive requests
with dynamic debug method print_hex_dump_debug().

Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>
Message-ID: <20230613084318.27996-1-abhijit.gangurde@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Abhijit Gangurde 2023-06-13 14:13:18 +05:30 committed by Greg Kroah-Hartman
parent b8c5ff7605
commit b1c8ea3c09
3 changed files with 9 additions and 93 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/cdx/controller/Kconfig
View File

@ -18,14 +18,4 @@ config CDX_CONTROLLER
If unsure, say N.
config MCDI_LOGGING
bool "MCDI Logging for the CDX controller"
depends on CDX_CONTROLLER
help
Enable MCDI Logging for
the CDX Controller for debug
purpose.
If unsure, say N.
endif

86
drivers/cdx/controller/mcdi.c
View File

@ -31,10 +31,6 @@ struct cdx_mcdi_copy_buffer {
struct cdx_dword buffer[DIV_ROUND_UP(MCDI_CTL_SDU_LEN_MAX, 4)];
};
#ifdef CONFIG_MCDI_LOGGING
#define LOG_LINE_MAX (1024 - 32)
#endif
static void cdx_mcdi_cancel_cmd(struct cdx_mcdi *cdx, struct cdx_mcdi_cmd *cmd);
static void cdx_mcdi_wait_for_cleanup(struct cdx_mcdi *cdx);
static int cdx_mcdi_rpc_async_internal(struct cdx_mcdi *cdx,
@ -119,14 +115,9 @@ int cdx_mcdi_init(struct cdx_mcdi *cdx)
mcdi = cdx_mcdi_if(cdx);
mcdi->cdx = cdx;
#ifdef CONFIG_MCDI_LOGGING
mcdi->logging_buffer = kmalloc(LOG_LINE_MAX, GFP_KERNEL);
if (!mcdi->logging_buffer)
goto fail2;
#endif
mcdi->workqueue = alloc_ordered_workqueue("mcdi_wq", 0);
if (!mcdi->workqueue)
goto fail3;
goto fail2;
mutex_init(&mcdi->iface_lock);
mcdi->mode = MCDI_MODE_EVENTS;
INIT_LIST_HEAD(&mcdi->cmd_list);
@ -135,11 +126,7 @@ int cdx_mcdi_init(struct cdx_mcdi *cdx)
mcdi->new_epoch = true;
return 0;
fail3:
#ifdef CONFIG_MCDI_LOGGING
kfree(mcdi->logging_buffer);
fail2:
#endif
kfree(cdx->mcdi);
cdx->mcdi = NULL;
fail:
@ -156,10 +143,6 @@ void cdx_mcdi_finish(struct cdx_mcdi *cdx)
cdx_mcdi_wait_for_cleanup(cdx);
#ifdef CONFIG_MCDI_LOGGING
kfree(mcdi->logging_buffer);
#endif
destroy_workqueue(mcdi->workqueue);
kfree(cdx->mcdi);
cdx->mcdi = NULL;
@ -246,15 +229,9 @@ static void cdx_mcdi_send_request(struct cdx_mcdi *cdx,
size_t hdr_len;
bool not_epoch;
u32 xflags;
#ifdef CONFIG_MCDI_LOGGING
char *buf;
#endif
if (!mcdi)
return;
#ifdef CONFIG_MCDI_LOGGING
buf = mcdi->logging_buffer; /* page-sized */
#endif
mcdi->prev_seq = cmd->seq;
mcdi->seq_held_by[cmd->seq] = cmd;
@ -281,39 +258,12 @@ static void cdx_mcdi_send_request(struct cdx_mcdi *cdx,
MC_CMD_V2_EXTN_IN_MCDI_MESSAGE_TYPE_PLATFORM);
hdr_len = 8;
#ifdef CONFIG_MCDI_LOGGING
if (!WARN_ON_ONCE(!buf)) {
const struct cdx_dword *frags[] = { hdr, inbuf };
const size_t frag_len[] = { hdr_len, round_up(inlen, 4) };
int bytes = 0;
int i, j;
for (j = 0; j < ARRAY_SIZE(frags); j++) {
const struct cdx_dword *frag;
frag = frags[j];
for (i = 0;
i < frag_len[j] / 4;
i++) {
/*
* Do not exceed the internal printk limit.
* The string before that is just over 70 bytes.
*/
if ((bytes + 75) > LOG_LINE_MAX) {
pr_info("MCDI RPC REQ:%s \\\n", buf);
bytes = 0;
}
bytes += snprintf(buf + bytes,
LOG_LINE_MAX - bytes, " %08x",
le32_to_cpu(frag[i].cdx_u32));
}
}
pr_info("MCDI RPC REQ:%s\n", buf);
}
#endif
hdr[0].cdx_u32 |= (__force __le32)(cdx_mcdi_payload_csum(hdr, hdr_len, inbuf, inlen) <<
MCDI_HEADER_XFLAGS_LBN);
print_hex_dump_debug("MCDI REQ HEADER: ", DUMP_PREFIX_NONE, 32, 4, hdr, hdr_len, false);
print_hex_dump_debug("MCDI REQ PAYLOAD: ", DUMP_PREFIX_NONE, 32, 4, inbuf, inlen, false);
cdx->mcdi_ops->mcdi_request(cdx, hdr, hdr_len, inbuf, inlen);
mcdi->new_epoch = false;
@ -700,28 +650,10 @@ static bool cdx_mcdi_complete_cmd(struct cdx_mcdi_iface *mcdi,
resp_data_len = 0;
}
#ifdef CONFIG_MCDI_LOGGING
if (!WARN_ON_ONCE(!mcdi->logging_buffer)) {
char *log = mcdi->logging_buffer;
int i, bytes = 0;
size_t rlen;
WARN_ON_ONCE(resp_hdr_len % 4);
rlen = resp_hdr_len / 4 + DIV_ROUND_UP(resp_data_len, 4);
for (i = 0; i < rlen; i++) {
if ((bytes + 75) > LOG_LINE_MAX) {
pr_info("MCDI RPC RESP:%s \\\n", log);
bytes = 0;
}
bytes += snprintf(log + bytes, LOG_LINE_MAX - bytes,
" %08x", le32_to_cpu(outbuf[i].cdx_u32));
}
pr_info("MCDI RPC RESP:%s\n", log);
}
#endif
print_hex_dump_debug("MCDI RESP HEADER: ", DUMP_PREFIX_NONE, 32, 4,
outbuf, resp_hdr_len, false);
print_hex_dump_debug("MCDI RESP PAYLOAD: ", DUMP_PREFIX_NONE, 32, 4,
outbuf + (resp_hdr_len / 4), resp_data_len, false);
if (error && resp_data_len == 0) {
/* MC rebooted during command */

6
drivers/cdx/controller/mcdi.h
View File

@ -153,8 +153,6 @@ struct cdx_mcdi_cmd {
* @mode: Poll for mcdi completion, or wait for an mcdi_event
* @prev_seq: The last used sequence number
* @new_epoch: Indicates start of day or start of MC reboot recovery
* @logging_buffer: Buffer that may be used to build MCDI tracing messages
* @logging_enabled: Whether to trace MCDI
*/
struct cdx_mcdi_iface {
struct cdx_mcdi *cdx;
@ -170,10 +168,6 @@ struct cdx_mcdi_iface {
enum cdx_mcdi_mode mode;
u8 prev_seq;
bool new_epoch;
#ifdef CONFIG_MCDI_LOGGING
bool logging_enabled;
char *logging_buffer;
#endif
};
/**