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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/drivers/misc/mei/mei_dev.h
....@@ -1,17 +1,7 @@
1
+/* SPDX-License-Identifier: GPL-2.0 */
12 /*
2
- *
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+ * Copyright (c) 2003-2019, Intel Corporation. All rights reserved.
34  * Intel Management Engine Interface (Intel MEI) Linux driver
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- * Copyright (c) 2003-2018, Intel Corporation.
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms and conditions of the GNU General Public License,
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- * version 2, as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope it will be useful, but WITHOUT
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- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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- * more details.
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- *
155  */
166 
177 #ifndef _MEI_DEV_H_
....@@ -122,6 +112,19 @@
122112 	unsigned char *data;
123113 };
124114 
115
+/**
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+ * struct mei_dma_dscr - dma address descriptor
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+ *
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+ * @vaddr: dma buffer virtual address
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+ * @daddr: dma buffer physical address
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+ * @size : dma buffer size
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+ */
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+struct mei_dma_dscr {
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+	void *vaddr;
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+	dma_addr_t daddr;
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+	size_t size;
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+};
127
+
125128 /* Maximum number of processed FW status registers */
126129 #define MEI_FW_STATUS_MAX 6
127130 /* Minimal  buffer for FW status string (8 bytes in dw + space or '\0') */
....@@ -171,6 +174,7 @@
171174  * @fop_type: file operation type
172175  * @buf: buffer for data associated with the callback
173176  * @buf_idx: last read index
177
+ * @vtag: virtual tag
174178  * @fp: pointer to file structure
175179  * @status: io status of the cb
176180  * @internal: communication between driver and FW flag
....@@ -182,10 +186,26 @@
182186 	enum mei_cb_file_ops fop_type;
183187 	struct mei_msg_data buf;
184188 	size_t buf_idx;
189
+	u8 vtag;
185190 	const struct file *fp;
186191 	int status;
187192 	u32 internal:1;
188193 	u32 blocking:1;
194
+};
195
+
196
+/**
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+ * struct mei_cl_vtag - file pointer to vtag mapping structure
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+ *
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+ * @list: link in map queue
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+ * @fp: file pointer
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+ * @vtag: corresponding vtag
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+ * @pending_read: the read is pending on this file
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+ */
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+struct mei_cl_vtag {
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+	struct list_head list;
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+	const struct file *fp;
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+	u8 vtag;
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+	u8 pending_read:1;
189209 };
190210 
191211 /**
....@@ -204,6 +224,7 @@
204224  * @me_cl: fw client connected
205225  * @fp: file associated with client
206226  * @host_client_id: host id
227
+ * @vtag_map: vtag map
207228  * @tx_flow_ctrl_creds: transmit flow credentials
208229  * @rx_flow_ctrl_creds: receive flow credentials
209230  * @timer_count:  watchdog timer for operation completion
....@@ -212,6 +233,7 @@
212233  * @tx_cb_queued: number of tx callbacks in queue
213234  * @writing_state: state of the tx
214235  * @rd_pending: pending read credits
236
+ * @rd_completed_lock: protects rd_completed queue
215237  * @rd_completed: completed read
216238  *
217239  * @cldev: device on the mei client bus
....@@ -229,6 +251,7 @@
229251 	struct mei_me_client *me_cl;
230252 	const struct file *fp;
231253 	u8 host_client_id;
254
+	struct list_head vtag_map;
232255 	u8 tx_flow_ctrl_creds;
233256 	u8 rx_flow_ctrl_creds;
234257 	u8 timer_count;
....@@ -237,6 +260,7 @@
237260 	u8 tx_cb_queued;
238261 	enum mei_file_transaction_states writing_state;
239262 	struct list_head rd_pending;
263
+	spinlock_t rd_completed_lock; /* protects rd_completed queue */
240264 	struct list_head rd_completed;
241265 
242266 	struct mei_cl_device *cldev;
....@@ -257,6 +281,7 @@
257281  * @hw_config        : configure hw
258282  *
259283  * @fw_status        : get fw status registers
284
+ * @trc_status       : get trc status register
260285  * @pg_state         : power gating state of the device
261286  * @pg_in_transition : is device now in pg transition
262287  * @pg_is_enabled    : is power gating enabled
....@@ -284,9 +309,11 @@
284309 	bool (*hw_is_ready)(struct mei_device *dev);
285310 	int (*hw_reset)(struct mei_device *dev, bool enable);
286311 	int (*hw_start)(struct mei_device *dev);
287
-	void (*hw_config)(struct mei_device *dev);
312
+	int (*hw_config)(struct mei_device *dev);
288313 
289314 	int (*fw_status)(struct mei_device *dev, struct mei_fw_status *fw_sts);
315
+	int (*trc_status)(struct mei_device *dev, u32 *trc);
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+
290317 	enum mei_pg_state (*pg_state)(struct mei_device *dev);
291318 	bool (*pg_in_transition)(struct mei_device *dev);
292319 	bool (*pg_is_enabled)(struct mei_device *dev);
....@@ -407,8 +434,10 @@
407434  *
408435  * @rd_msg_buf  : control messages buffer
409436  * @rd_msg_hdr  : read message header storage
437
+ * @rd_msg_hdr_count : how many dwords were already read from header
410438  *
411439  * @hbuf_is_ready : query if the host host/write buffer is ready
440
+ * @dr_dscr: DMA ring descriptors: TX, RX, and CTRL
412441  *
413442  * @version     : HBM protocol version in use
414443  * @hbm_f_pg_supported  : hbm feature pgi protocol
....@@ -419,6 +448,8 @@
419448  * @hbm_f_ie_supported  : hbm feature immediate reply to enum request
420449  * @hbm_f_os_supported  : hbm feature support OS ver message
421450  * @hbm_f_dr_supported  : hbm feature dma ring supported
451
+ * @hbm_f_vt_supported  : hbm feature vtag supported
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+ * @hbm_f_cap_supported : hbm feature capabilities message supported
422453  *
423454  * @fw_ver : FW versions
424455  *
....@@ -437,6 +468,8 @@
437468  *
438469  * @device_list : mei client bus list
439470  * @cl_bus_lock : client bus list lock
471
+ *
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+ * @kind        : kind of mei device
440473  *
441474  * @dbgfs_dir   : debugfs mei root directory
442475  *
....@@ -485,10 +518,13 @@
485518 #endif /* CONFIG_PM */
486519 
487520 	unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE];
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-	u32 rd_msg_hdr;
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+	u32 rd_msg_hdr[MEI_RD_MSG_BUF_SIZE];
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+	int rd_msg_hdr_count;
489523 
490524 	/* write buffer */
491525 	bool hbuf_is_ready;
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+
527
+	struct mei_dma_dscr dr_dscr[DMA_DSCR_NUM];
492528 
493529 	struct hbm_version version;
494530 	unsigned int hbm_f_pg_supported:1;
....@@ -499,6 +535,8 @@
499535 	unsigned int hbm_f_ie_supported:1;
500536 	unsigned int hbm_f_os_supported:1;
501537 	unsigned int hbm_f_dr_supported:1;
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+	unsigned int hbm_f_vt_supported:1;
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+	unsigned int hbm_f_cap_supported:1;
502540 
503541 	struct mei_fw_version fw_ver[MEI_MAX_FW_VER_BLOCKS];
504542 
....@@ -519,13 +557,14 @@
519557 	struct list_head device_list;
520558 	struct mutex cl_bus_lock;
521559 
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+	const char *kind;
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+
522562 #if IS_ENABLED(CONFIG_DEBUG_FS)
523563 	struct dentry *dbgfs_dir;
524564 #endif /* CONFIG_DEBUG_FS */
525565 
526
-
527566 	const struct mei_hw_ops *ops;
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-	char hw[0] __aligned(sizeof(void *));
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+	char hw[] __aligned(sizeof(void *));
529568 };
530569 
531570 static inline unsigned long mei_secs_to_jiffies(unsigned long sec)
....@@ -582,6 +621,16 @@
582621 void mei_stop(struct mei_device *dev);
583622 void mei_cancel_work(struct mei_device *dev);
584623 
624
+void mei_set_devstate(struct mei_device *dev, enum mei_dev_state state);
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+
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+int mei_dmam_ring_alloc(struct mei_device *dev);
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+void mei_dmam_ring_free(struct mei_device *dev);
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+bool mei_dma_ring_is_allocated(struct mei_device *dev);
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+void mei_dma_ring_reset(struct mei_device *dev);
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+void mei_dma_ring_read(struct mei_device *dev, unsigned char *buf, u32 len);
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+void mei_dma_ring_write(struct mei_device *dev, unsigned char *buf, u32 len);
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+u32 mei_dma_ring_empty_slots(struct mei_device *dev);
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+
585634 /*
586635  *  MEI interrupt functions prototype
587636  */
....@@ -599,9 +648,9 @@
599648  */
600649 
601650 
602
-static inline void mei_hw_config(struct mei_device *dev)
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+static inline int mei_hw_config(struct mei_device *dev)
603652 {
604
-	dev->ops->hw_config(dev);
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+	return dev->ops->hw_config(dev);
605654 }
606655 
607656 static inline enum mei_pg_state mei_pg_state(struct mei_device *dev)
....@@ -696,6 +745,13 @@
696745 	return dev->ops->rdbuf_full_slots(dev);
697746 }
698747 
748
+static inline int mei_trc_status(struct mei_device *dev, u32 *trc)
749
+{
750
+	if (dev->ops->trc_status)
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+		return dev->ops->trc_status(dev, trc);
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+	return -EOPNOTSUPP;
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+}
754
+
699755 static inline int mei_fw_status(struct mei_device *dev,
700756 				struct mei_fw_status *fw_status)
701757 {
....@@ -707,23 +763,21 @@
707763 bool mei_write_is_idle(struct mei_device *dev);
708764 
709765 #if IS_ENABLED(CONFIG_DEBUG_FS)
710
-int mei_dbgfs_register(struct mei_device *dev, const char *name);
766
+void mei_dbgfs_register(struct mei_device *dev, const char *name);
711767 void mei_dbgfs_deregister(struct mei_device *dev);
712768 #else
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-static inline int mei_dbgfs_register(struct mei_device *dev, const char *name)
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-{
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-	return 0;
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-}
769
+static inline void mei_dbgfs_register(struct mei_device *dev, const char *name) {}
717770 static inline void mei_dbgfs_deregister(struct mei_device *dev) {}
718771 #endif /* CONFIG_DEBUG_FS */
719772 
720773 int mei_register(struct mei_device *dev, struct device *parent);
721774 void mei_deregister(struct mei_device *dev);
722775 
723
-#define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d dma=%1d internal=%1d comp=%1d"
776
+#define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d dma=%1d ext=%1d internal=%1d comp=%1d"
724777 #define MEI_HDR_PRM(hdr)                  \
725778 	(hdr)->host_addr, (hdr)->me_addr, \
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-	(hdr)->length, (hdr)->dma_ring, (hdr)->internal, (hdr)->msg_complete
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+	(hdr)->length, (hdr)->dma_ring, (hdr)->extended, \
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+	(hdr)->internal, (hdr)->msg_complete
727781 
728782 ssize_t mei_fw_status2str(struct mei_fw_status *fw_sts, char *buf, size_t len);
729783 /**