ath11k: add read variant from SMBIOS for download board data

This is to read variant from SMBIOS such as read from DT, the variant
string will be used to one part of string which used to search board
data from board-2.bin.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3

Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220315104721.26649-3-quic_wgong@quicinc.com

diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c
index 6e7f952b315d1ac6a9773e7211d51654c9dc8983..7b91b029074f852a773bae7798237330ca4b1f66 100644 (file)
--- a/drivers/net/wireless/ath/ath11k/core.c
+++ b/drivers/net/wireless/ath/ath11k/core.c
@@ -9,6 +9,7 @@
 #include <linux/remoteproc.h>
 #include <linux/firmware.h>
 #include <linux/of.h>
+
 #include "core.h"
 #include "dp_tx.h"
 #include "dp_rx.h"
@@ -548,6 +549,75 @@ int ath11k_core_resume(struct ath11k_base *ab)
 }
 EXPORT_SYMBOL(ath11k_core_resume);
 
+static void ath11k_core_check_bdfext(const struct dmi_header *hdr, void *data)
+{
+       struct ath11k_base *ab = data;
+       const char *magic = ATH11K_SMBIOS_BDF_EXT_MAGIC;
+       struct ath11k_smbios_bdf *smbios = (struct ath11k_smbios_bdf *)hdr;
+       ssize_t copied;
+       size_t len;
+       int i;
+
+       if (ab->qmi.target.bdf_ext[0] != '\0')
+               return;
+
+       if (hdr->type != ATH11K_SMBIOS_BDF_EXT_TYPE)
+               return;
+
+       if (hdr->length != ATH11K_SMBIOS_BDF_EXT_LENGTH) {
+               ath11k_dbg(ab, ATH11K_DBG_BOOT,
+                          "wrong smbios bdf ext type length (%d).\n",
+                          hdr->length);
+               return;
+       }
+
+       if (!smbios->bdf_enabled) {
+               ath11k_dbg(ab, ATH11K_DBG_BOOT, "bdf variant name not found.\n");
+               return;
+       }
+
+       /* Only one string exists (per spec) */
+       if (memcmp(smbios->bdf_ext, magic, strlen(magic)) != 0) {
+               ath11k_dbg(ab, ATH11K_DBG_BOOT,
+                          "bdf variant magic does not match.\n");
+               return;
+       }
+
+       len = min_t(size_t,
+                   strlen(smbios->bdf_ext), sizeof(ab->qmi.target.bdf_ext));
+       for (i = 0; i < len; i++) {
+               if (!isascii(smbios->bdf_ext[i]) || !isprint(smbios->bdf_ext[i])) {
+                       ath11k_dbg(ab, ATH11K_DBG_BOOT,
+                                  "bdf variant name contains non ascii chars.\n");
+                       return;
+               }
+       }
+
+       /* Copy extension name without magic prefix */
+       copied = strscpy(ab->qmi.target.bdf_ext, smbios->bdf_ext + strlen(magic),
+                        sizeof(ab->qmi.target.bdf_ext));
+       if (copied < 0) {
+               ath11k_dbg(ab, ATH11K_DBG_BOOT,
+                          "bdf variant string is longer than the buffer can accommodate\n");
+               return;
+       }
+
+       ath11k_dbg(ab, ATH11K_DBG_BOOT,
+                  "found and validated bdf variant smbios_type 0x%x bdf %s\n",
+                  ATH11K_SMBIOS_BDF_EXT_TYPE, ab->qmi.target.bdf_ext);
+}
+
+int ath11k_core_check_smbios(struct ath11k_base *ab)
+{
+       ab->qmi.target.bdf_ext[0] = '\0';
+       dmi_walk(ath11k_core_check_bdfext, ab);
+
+       if (ab->qmi.target.bdf_ext[0] == '\0')
+               return -ENODATA;
+
+       return 0;
+}
+
 int ath11k_core_check_dt(struct ath11k_base *ab)
 {
        size_t max_len = sizeof(ab->qmi.target.bdf_ext);

diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
index 70eb6e418422c29d1e8c6466c378e46133ee60a6..6b272eb8bb4a36fe9e848b5dfbace64adaf6e6db 100644 (file)
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -10,6 +10,8 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/bitfield.h>
+#include <linux/dmi.h>
+#include <linux/ctype.h>
 #include "qmi.h"
 #include "htc.h"
 #include "wmi.h"
@@ -37,6 +39,15 @@
 #define ATH11K_INVALID_HW_MAC_ID       0xFF
 #define ATH11K_CONNECTION_LOSS_HZ      (3 * HZ)
 
+/* SMBIOS type containing Board Data File Name Extension */
+#define ATH11K_SMBIOS_BDF_EXT_TYPE 0xF8
+
+/* SMBIOS type structure length (excluding strings-set) */
+#define ATH11K_SMBIOS_BDF_EXT_LENGTH 0x9
+
+/* The magic used by QCA spec */
+#define ATH11K_SMBIOS_BDF_EXT_MAGIC "BDF_"
+
 extern unsigned int ath11k_frame_mode;
 
 #define ATH11K_MON_TIMER_INTERVAL  10
@@ -154,6 +165,13 @@ struct ath11k_ext_irq_grp {
        struct net_device napi_ndev;
 };
 
+struct ath11k_smbios_bdf {
+       struct dmi_header hdr;
+       u32 padding;
+       u8 bdf_enabled;
+       u8 bdf_ext[];
+};
+
 #define HEHANDLE_CAP_PHYINFO_SIZE       3
 #define HECAP_PHYINFO_SIZE              9
 #define HECAP_MACINFO_SIZE              5
@@ -1046,7 +1064,7 @@ int ath11k_core_fetch_board_data_api_1(struct ath11k_base *ab,
                                       const char *name);
 void ath11k_core_free_bdf(struct ath11k_base *ab, struct ath11k_board_data *bd);
 int ath11k_core_check_dt(struct ath11k_base *ath11k);
-
+int ath11k_core_check_smbios(struct ath11k_base *ab);
 void ath11k_core_halt(struct ath11k *ar);
 int ath11k_core_resume(struct ath11k_base *ab);
 int ath11k_core_suspend(struct ath11k_base *ab);

diff --git a/drivers/net/wireless/ath/ath11k/qmi.c b/drivers/net/wireless/ath/ath11k/qmi.c
index ffb8aa7dfb02db25aa2a501ede88aa91a8fc05e0..0442faa3b7afbc28333c5537bfae3597672ff1cc 100644 (file)
--- a/drivers/net/wireless/ath/ath11k/qmi.c
+++ b/drivers/net/wireless/ath/ath11k/qmi.c
@@ -2095,6 +2095,10 @@ static int ath11k_qmi_request_target_cap(struct ath11k_base *ab)
                    ab->qmi.target.fw_build_timestamp,
                    fw_build_id);
 
+       r = ath11k_core_check_smbios(ab);
+       if (r)
+               ath11k_dbg(ab, ATH11K_DBG_QMI, "SMBIOS bdf variant name not set.\n");
+
        r = ath11k_core_check_dt(ab);
        if (r)
                ath11k_dbg(ab, ATH11K_DBG_QMI, "DT bdf variant name not set.\n");