ath10k: Enable MSA region dump support for WCN3990

MSA memory region caries the hw descriptors information.
Dump MSA region in core dump as this is very helpful in debugging
hw issues.

Testing: Tested on WCN3990 HW
Tested FW: WLAN.HL.3.1-00959-QCAHLSWMTPLZ-1

Signed-off-by: Govind Singh <govinds@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 66 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
index c8c92906a178..cd22c8654aa9 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.c
+++ b/drivers/net/wireless/ath/ath10k/snoc.c
@@ -13,6 +13,7 @@
 #include <linux/regulator/consumer.h>
 
 #include "ce.h"
+#include "coredump.h"
 #include "debug.h"
 #include "hif.h"
 #include "htc.h"
@@ -1389,6 +1390,71 @@ static int ath10k_hw_power_off(struct ath10k *ar)
 	return regulator_bulk_disable(ar_snoc->num_vregs, ar_snoc->vregs);
 }
 
+static void ath10k_msa_dump_memory(struct ath10k *ar,
+				   struct ath10k_fw_crash_data *crash_data)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	const struct ath10k_hw_mem_layout *mem_layout;
+	const struct ath10k_mem_region *current_region;
+	struct ath10k_dump_ram_data_hdr *hdr;
+	size_t buf_len;
+	u8 *buf;
+
+	if (!crash_data && !crash_data->ramdump_buf)
+		return;
+
+	mem_layout = ath10k_coredump_get_mem_layout(ar);
+	if (!mem_layout)
+		return;
+
+	current_region = &mem_layout->region_table.regions[0];
+
+	buf = crash_data->ramdump_buf;
+	buf_len = crash_data->ramdump_buf_len;
+	memset(buf, 0, buf_len);
+
+	/* Reserve space for the header. */
+	hdr = (void *)buf;
+	buf += sizeof(*hdr);
+	buf_len -= sizeof(*hdr);
+
+	hdr->region_type = cpu_to_le32(current_region->type);
+	hdr->start = cpu_to_le32((unsigned long)ar_snoc->qmi->msa_va);
+	hdr->length = cpu_to_le32(ar_snoc->qmi->msa_mem_size);
+
+	if (current_region->len < ar_snoc->qmi->msa_mem_size) {
+		memcpy(buf, ar_snoc->qmi->msa_va, current_region->len);
+		ath10k_warn(ar, "msa dump length is less than msa size %x, %x\n",
+			    current_region->len, ar_snoc->qmi->msa_mem_size);
+	} else {
+		memcpy(buf, ar_snoc->qmi->msa_va, ar_snoc->qmi->msa_mem_size);
+	}
+}
+
+void ath10k_snoc_fw_crashed_dump(struct ath10k *ar)
+{
+	struct ath10k_fw_crash_data *crash_data;
+	char guid[UUID_STRING_LEN + 1];
+
+	mutex_lock(&ar->dump_mutex);
+
+	spin_lock_bh(&ar->data_lock);
+	ar->stats.fw_crash_counter++;
+	spin_unlock_bh(&ar->data_lock);
+
+	crash_data = ath10k_coredump_new(ar);
+
+	if (crash_data)
+		scnprintf(guid, sizeof(guid), "%pUl", &crash_data->guid);
+	else
+		scnprintf(guid, sizeof(guid), "n/a");
+
+	ath10k_err(ar, "firmware crashed! (guid %s)\n", guid);
+	ath10k_print_driver_info(ar);
+	ath10k_msa_dump_memory(ar, crash_data);
+	mutex_unlock(&ar->dump_mutex);
+}
+
 static const struct of_device_id ath10k_snoc_dt_match[] = {
 	{ .compatible = "qcom,wcn3990-wifi",
 	 .data = &drv_priv,