net: wwan: iosm: firmware flashing and coredump collection

This patch brings-in support for M.2 7560 Device firmware flashing &
coredump collection using devlink.
- Driver Registers with Devlink framework.
- Register devlink params callback for configuring device params
  required in flashing or coredump flow.
- Implements devlink ops flash_update callback that programs modem
  firmware.
- Creates region & snapshot required for device coredump log collection.

On early detection of device in boot rom stage. Driver registers with
Devlink framework and establish transport channel for PSI (Primary Signed
Image) injection. Once PSI is injected to device, the device execution
stage details are read to determine whether device is in flash or
exception mode. The collected information is reported to devlink user
space application & based on this informationi, application proceeds with
either modem firmware flashing or coredump collection.

Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 75 insertions, 0 deletions

diff --git a/drivers/net/wwan/iosm/iosm_ipc_coredump.h b/drivers/net/wwan/iosm/iosm_ipc_coredump.h
new file mode 100644
index 000000000000..d5028153c8d1
--- /dev/null
+++ b/drivers/net/wwan/iosm/iosm_ipc_coredump.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ *
+ * Copyright (C) 2020-2021 Intel Corporation.
+ */
+
+#ifndef _IOSM_IPC_COREDUMP_H_
+#define _IOSM_IPC_COREDUMP_H_
+
+#include "iosm_ipc_devlink.h"
+
+/* Max number of bytes to receive for Coredump list structure */
+#define MAX_CD_LIST_SIZE  0x1000
+
+/* Max buffer allocated to receive coredump data */
+#define MAX_DATA_SIZE 0x00010000
+
+/* Max number of file entries */
+#define MAX_NOF_ENTRY 256
+
+/* Max length */
+#define MAX_SIZE_LEN 32
+
+/**
+ * struct iosm_cd_list_entry - Structure to hold coredump file info.
+ * @size:       Number of bytes for the entry
+ * @filename:   Coredump filename to be generated on host
+ */
+struct iosm_cd_list_entry {
+	__le32 size;
+	char filename[IOSM_MAX_FILENAME_LEN];
+} __packed;
+
+/**
+ * struct iosm_cd_list - Structure to hold list of coredump files
+ *                      to be collected.
+ * @num_entries:        Number of entries to be received
+ * @entry:              Contains File info
+ */
+struct iosm_cd_list {
+	__le32 num_entries;
+	struct iosm_cd_list_entry entry[MAX_NOF_ENTRY];
+} __packed;
+
+/**
+ * struct iosm_cd_table - Common Coredump table
+ * @version:            Version of coredump structure
+ * @list:               Coredump list structure
+ */
+struct iosm_cd_table {
+	__le32 version;
+	struct iosm_cd_list list;
+} __packed;
+
+/**
+ * ipc_coredump_collect - To collect coredump
+ * @devlink:		Pointer to devlink instance.
+ * @data:		Pointer to snapshot
+ * @entry:		ID of requested snapshot
+ * @region_size:	Region size
+ *
+ * Returns: 0 on success, error on failure
+ */
+int ipc_coredump_collect(struct iosm_devlink *devlink, u8 **data, int entry,
+			 u32 region_size);
+
+/**
+ * ipc_coredump_get_list - Get coredump list
+ * @devlink:         Pointer to devlink instance.
+ * @cmd:	     RPSI command to be sent
+ *
+ * Returns: 0 on success, error on failure
+ */
+int ipc_coredump_get_list(struct iosm_devlink *devlink, u16 cmd);
+
+#endif /* _IOSM_IPC_COREDUMP_H_ */