1 files changed, 341 insertions, 0 deletions

diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h
new file mode 100644
index 000000000000..5af2e4187f01
--- /dev/null
+++ b/drivers/scsi/hisi_sas/hisi_sas.h
@@ -0,0 +1,341 @@
+/*
+ * Copyright (c) 2015 Linaro Ltd.
+ * Copyright (c) 2015 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#ifndef _HISI_SAS_H_
+#define _HISI_SAS_H_
+
+#include <linux/dmapool.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <scsi/libsas.h>
+
+#define DRV_VERSION "v1.0"
+
+#define HISI_SAS_MAX_PHYS	9
+#define HISI_SAS_MAX_QUEUES	32
+#define HISI_SAS_QUEUE_SLOTS 512
+#define HISI_SAS_MAX_ITCT_ENTRIES 4096
+#define HISI_SAS_MAX_DEVICES HISI_SAS_MAX_ITCT_ENTRIES
+#define HISI_SAS_COMMAND_ENTRIES 8192
+
+#define HISI_SAS_STATUS_BUF_SZ \
+		(sizeof(struct hisi_sas_err_record) + 1024)
+#define HISI_SAS_COMMAND_TABLE_SZ \
+		(((sizeof(union hisi_sas_command_table)+3)/4)*4)
+
+#define HISI_SAS_MAX_SSP_RESP_SZ (sizeof(struct ssp_frame_hdr) + 1024)
+#define HISI_SAS_MAX_SMP_RESP_SZ 1028
+
+struct hisi_hba;
+
+enum {
+	PORT_TYPE_SAS = (1U << 1),
+	PORT_TYPE_SATA = (1U << 0),
+};
+
+enum dev_status {
+	HISI_SAS_DEV_NORMAL,
+	HISI_SAS_DEV_EH,
+};
+
+enum hisi_sas_dev_type {
+	HISI_SAS_DEV_TYPE_STP = 0,
+	HISI_SAS_DEV_TYPE_SSP,
+	HISI_SAS_DEV_TYPE_SATA,
+};
+
+struct hisi_sas_phy {
+	struct hisi_hba	*hisi_hba;
+	struct hisi_sas_port	*port;
+	struct asd_sas_phy	sas_phy;
+	struct sas_identify	identify;
+	struct timer_list	timer;
+	struct work_struct	phyup_ws;
+	u64		port_id; /* from hw */
+	u64		dev_sas_addr;
+	u64		phy_type;
+	u64		frame_rcvd_size;
+	u8		frame_rcvd[32];
+	u8		phy_attached;
+	u8		reserved[3];
+	enum sas_linkrate	minimum_linkrate;
+	enum sas_linkrate	maximum_linkrate;
+};
+
+struct hisi_sas_port {
+	struct asd_sas_port	sas_port;
+	u8	port_attached;
+	u8	id; /* from hw */
+	struct list_head	list;
+};
+
+struct hisi_sas_cq {
+	struct hisi_hba *hisi_hba;
+	int	id;
+};
+
+struct hisi_sas_device {
+	enum sas_device_type	dev_type;
+	struct hisi_hba		*hisi_hba;
+	struct domain_device	*sas_device;
+	u64 attached_phy;
+	u64 device_id;
+	u64 running_req;
+	u8 dev_status;
+};
+
+struct hisi_sas_slot {
+	struct list_head entry;
+	struct sas_task *task;
+	struct hisi_sas_port	*port;
+	u64	n_elem;
+	int	dlvry_queue;
+	int	dlvry_queue_slot;
+	int	cmplt_queue;
+	int	cmplt_queue_slot;
+	int	idx;
+	void	*cmd_hdr;
+	dma_addr_t cmd_hdr_dma;
+	void	*status_buffer;
+	dma_addr_t status_buffer_dma;
+	void *command_table;
+	dma_addr_t command_table_dma;
+	struct hisi_sas_sge_page *sge_page;
+	dma_addr_t sge_page_dma;
+};
+
+struct hisi_sas_tmf_task {
+	u8 tmf;
+	u16 tag_of_task_to_be_managed;
+};
+
+struct hisi_sas_hw {
+	int (*hw_init)(struct hisi_hba *hisi_hba);
+	void (*setup_itct)(struct hisi_hba *hisi_hba,
+			   struct hisi_sas_device *device);
+	void (*sl_notify)(struct hisi_hba *hisi_hba, int phy_no);
+	int (*get_free_slot)(struct hisi_hba *hisi_hba, int *q, int *s);
+	void (*start_delivery)(struct hisi_hba *hisi_hba);
+	int (*prep_ssp)(struct hisi_hba *hisi_hba,
+			struct hisi_sas_slot *slot, int is_tmf,
+			struct hisi_sas_tmf_task *tmf);
+	int (*prep_smp)(struct hisi_hba *hisi_hba,
+			struct hisi_sas_slot *slot);
+	int (*slot_complete)(struct hisi_hba *hisi_hba,
+			     struct hisi_sas_slot *slot, int abort);
+	void (*phy_enable)(struct hisi_hba *hisi_hba, int phy_no);
+	void (*phy_disable)(struct hisi_hba *hisi_hba, int phy_no);
+	void (*phy_hard_reset)(struct hisi_hba *hisi_hba, int phy_no);
+	void (*free_device)(struct hisi_hba *hisi_hba,
+			    struct hisi_sas_device *dev);
+	int (*get_wideport_bitmap)(struct hisi_hba *hisi_hba, int port_id);
+	int complete_hdr_size;
+};
+
+struct hisi_hba {
+	/* This must be the first element, used by SHOST_TO_SAS_HA */
+	struct sas_ha_struct *p;
+
+	struct platform_device *pdev;
+	void __iomem *regs;
+	struct regmap *ctrl;
+	u32 ctrl_reset_reg;
+	u32 ctrl_reset_sts_reg;
+	u32 ctrl_clock_ena_reg;
+	u8 sas_addr[SAS_ADDR_SIZE];
+
+	int n_phy;
+	int scan_finished;
+	spinlock_t lock;
+
+	struct timer_list timer;
+	struct workqueue_struct *wq;
+
+	int slot_index_count;
+	unsigned long *slot_index_tags;
+
+	/* SCSI/SAS glue */
+	struct sas_ha_struct sha;
+	struct Scsi_Host *shost;
+
+	struct hisi_sas_cq cq[HISI_SAS_MAX_QUEUES];
+	struct hisi_sas_phy phy[HISI_SAS_MAX_PHYS];
+	struct hisi_sas_port port[HISI_SAS_MAX_PHYS];
+
+	int	queue_count;
+	int	queue;
+	struct hisi_sas_slot	*slot_prep;
+
+	struct dma_pool *sge_page_pool;
+	struct hisi_sas_device	devices[HISI_SAS_MAX_DEVICES];
+	struct dma_pool *command_table_pool;
+	struct dma_pool *status_buffer_pool;
+	struct hisi_sas_cmd_hdr	*cmd_hdr[HISI_SAS_MAX_QUEUES];
+	dma_addr_t cmd_hdr_dma[HISI_SAS_MAX_QUEUES];
+	void *complete_hdr[HISI_SAS_MAX_QUEUES];
+	dma_addr_t complete_hdr_dma[HISI_SAS_MAX_QUEUES];
+	struct hisi_sas_initial_fis *initial_fis;
+	dma_addr_t initial_fis_dma;
+	struct hisi_sas_itct *itct;
+	dma_addr_t itct_dma;
+	struct hisi_sas_iost *iost;
+	dma_addr_t iost_dma;
+	struct hisi_sas_breakpoint *breakpoint;
+	dma_addr_t breakpoint_dma;
+	struct hisi_sas_breakpoint *sata_breakpoint;
+	dma_addr_t sata_breakpoint_dma;
+	struct hisi_sas_slot	*slot_info;
+	const struct hisi_sas_hw *hw;	/* Low level hw interface */
+};
+
+/* Generic HW DMA host memory structures */
+/* Delivery queue header */
+struct hisi_sas_cmd_hdr {
+	/* dw0 */
+	__le32 dw0;
+
+	/* dw1 */
+	__le32 dw1;
+
+	/* dw2 */
+	__le32 dw2;
+
+	/* dw3 */
+	__le32 transfer_tags;
+
+	/* dw4 */
+	__le32 data_transfer_len;
+
+	/* dw5 */
+	__le32 first_burst_num;
+
+	/* dw6 */
+	__le32 sg_len;
+
+	/* dw7 */
+	__le32 dw7;
+
+	/* dw8-9 */
+	__le64 cmd_table_addr;
+
+	/* dw10-11 */
+	__le64 sts_buffer_addr;
+
+	/* dw12-13 */
+	__le64 prd_table_addr;
+
+	/* dw14-15 */
+	__le64 dif_prd_table_addr;
+};
+
+struct hisi_sas_itct {
+	__le64 qw0;
+	__le64 sas_addr;
+	__le64 qw2;
+	__le64 qw3;
+	__le64 qw4;
+	__le64 qw_sata_ncq0_3;
+	__le64 qw_sata_ncq7_4;
+	__le64 qw_sata_ncq11_8;
+	__le64 qw_sata_ncq15_12;
+	__le64 qw_sata_ncq19_16;
+	__le64 qw_sata_ncq23_20;
+	__le64 qw_sata_ncq27_24;
+	__le64 qw_sata_ncq31_28;
+	__le64 qw_non_ncq_iptt;
+	__le64 qw_rsvd0;
+	__le64 qw_rsvd1;
+};
+
+struct hisi_sas_iost {
+	__le64 qw0;
+	__le64 qw1;
+	__le64 qw2;
+	__le64 qw3;
+};
+
+struct hisi_sas_err_record {
+	/* dw0 */
+	__le32 dma_err_type;
+
+	/* dw1 */
+	__le32 trans_tx_fail_type;
+
+	/* dw2 */
+	__le32 trans_rx_fail_type;
+
+	/* dw3 */
+	u32 rsvd;
+};
+
+struct hisi_sas_initial_fis {
+	struct hisi_sas_err_record err_record;
+	struct dev_to_host_fis fis;
+	u32 rsvd[3];
+};
+
+struct hisi_sas_breakpoint {
+	u8	data[128];	/*io128 byte*/
+};
+
+struct hisi_sas_sge {
+	__le64 addr;
+	__le32 page_ctrl_0;
+	__le32 page_ctrl_1;
+	__le32 data_len;
+	__le32 data_off;
+};
+
+struct hisi_sas_command_table_smp {
+	u8 bytes[44];
+};
+
+struct hisi_sas_command_table_stp {
+	struct	host_to_dev_fis command_fis;
+	u8	dummy[12];
+	u8	atapi_cdb[ATAPI_CDB_LEN];
+};
+
+#define HISI_SAS_SGE_PAGE_CNT SCSI_MAX_SG_SEGMENTS
+struct hisi_sas_sge_page {
+	struct hisi_sas_sge sge[HISI_SAS_SGE_PAGE_CNT];
+};
+
+struct hisi_sas_command_table_ssp {
+	struct ssp_frame_hdr hdr;
+	union {
+		struct {
+			struct ssp_command_iu task;
+			u32 prot[6];
+		};
+		struct ssp_tmf_iu ssp_task;
+		struct xfer_rdy_iu xfer_rdy;
+		struct ssp_response_iu ssp_res;
+	} u;
+};
+
+union hisi_sas_command_table {
+	struct hisi_sas_command_table_ssp ssp;
+	struct hisi_sas_command_table_smp smp;
+	struct hisi_sas_command_table_stp stp;
+};
+extern int hisi_sas_probe(struct platform_device *pdev,
+			  const struct hisi_sas_hw *ops);
+extern int hisi_sas_remove(struct platform_device *pdev);
+
+extern void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy);
+extern void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba,
+				    struct sas_task *task,
+				    struct hisi_sas_slot *slot);
+#endif