2 * Copyright (c) 2015 Linaro Ltd.
3 * Copyright (c) 2015 Hisilicon Limited.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
15 #include <linux/acpi.h>
16 #include <linux/clk.h>
17 #include <linux/dmapool.h>
18 #include <linux/mfd/syscon.h>
19 #include <linux/module.h>
20 #include <linux/of_address.h>
21 #include <linux/platform_device.h>
22 #include <linux/property.h>
23 #include <linux/regmap.h>
24 #include <scsi/sas_ata.h>
25 #include <scsi/libsas.h>
27 #define DRV_VERSION "v1.6"
29 #define HISI_SAS_MAX_PHYS 9
30 #define HISI_SAS_MAX_QUEUES 32
31 #define HISI_SAS_QUEUE_SLOTS 512
32 #define HISI_SAS_MAX_ITCT_ENTRIES 2048
33 #define HISI_SAS_MAX_DEVICES HISI_SAS_MAX_ITCT_ENTRIES
34 #define HISI_SAS_RESET_BIT 0
36 #define HISI_SAS_STATUS_BUF_SZ \
37 (sizeof(struct hisi_sas_err_record) + 1024)
38 #define HISI_SAS_COMMAND_TABLE_SZ \
39 (((sizeof(union hisi_sas_command_table)+3)/4)*4)
41 #define HISI_SAS_MAX_SSP_RESP_SZ (sizeof(struct ssp_frame_hdr) + 1024)
42 #define HISI_SAS_MAX_SMP_RESP_SZ 1028
43 #define HISI_SAS_MAX_STP_RESP_SZ 28
45 #define DEV_IS_EXPANDER(type) \
46 ((type == SAS_EDGE_EXPANDER_DEVICE) || \
47 (type == SAS_FANOUT_EXPANDER_DEVICE))
52 PORT_TYPE_SAS = (1U << 1),
53 PORT_TYPE_SATA = (1U << 0),
62 HISI_SAS_INT_ABT_CMD = 0,
63 HISI_SAS_INT_ABT_DEV = 1,
66 enum hisi_sas_dev_type {
67 HISI_SAS_DEV_TYPE_STP = 0,
68 HISI_SAS_DEV_TYPE_SSP,
69 HISI_SAS_DEV_TYPE_SATA,
73 struct hisi_hba *hisi_hba;
74 struct hisi_sas_port *port;
75 struct asd_sas_phy sas_phy;
76 struct sas_identify identify;
77 struct timer_list timer;
78 struct work_struct phyup_ws;
79 u64 port_id; /* from hw */
86 enum sas_linkrate minimum_linkrate;
87 enum sas_linkrate maximum_linkrate;
90 struct hisi_sas_port {
91 struct asd_sas_port sas_port;
97 struct hisi_hba *hisi_hba;
98 struct tasklet_struct tasklet;
104 struct hisi_hba *hisi_hba;
109 struct hisi_sas_device {
110 enum sas_device_type dev_type;
111 struct hisi_hba *hisi_hba;
112 struct domain_device *sas_device;
115 atomic64_t running_req;
116 struct list_head list;
121 struct hisi_sas_slot {
122 struct list_head entry;
123 struct sas_task *task;
124 struct hisi_sas_port *port;
127 int dlvry_queue_slot;
129 int cmplt_queue_slot;
133 dma_addr_t cmd_hdr_dma;
135 dma_addr_t status_buffer_dma;
137 dma_addr_t command_table_dma;
138 struct hisi_sas_sge_page *sge_page;
139 dma_addr_t sge_page_dma;
140 struct work_struct abort_slot;
141 struct timer_list internal_abort_timer;
144 struct hisi_sas_tmf_task {
146 u16 tag_of_task_to_be_managed;
150 int (*hw_init)(struct hisi_hba *hisi_hba);
151 void (*setup_itct)(struct hisi_hba *hisi_hba,
152 struct hisi_sas_device *device);
153 int (*slot_index_alloc)(struct hisi_hba *hisi_hba, int *slot_idx,
154 struct domain_device *device);
155 struct hisi_sas_device *(*alloc_dev)(struct domain_device *device);
156 void (*sl_notify)(struct hisi_hba *hisi_hba, int phy_no);
157 int (*get_free_slot)(struct hisi_hba *hisi_hba, u32 dev_id,
159 void (*start_delivery)(struct hisi_hba *hisi_hba);
160 int (*prep_ssp)(struct hisi_hba *hisi_hba,
161 struct hisi_sas_slot *slot, int is_tmf,
162 struct hisi_sas_tmf_task *tmf);
163 int (*prep_smp)(struct hisi_hba *hisi_hba,
164 struct hisi_sas_slot *slot);
165 int (*prep_stp)(struct hisi_hba *hisi_hba,
166 struct hisi_sas_slot *slot);
167 int (*prep_abort)(struct hisi_hba *hisi_hba,
168 struct hisi_sas_slot *slot,
169 int device_id, int abort_flag, int tag_to_abort);
170 int (*slot_complete)(struct hisi_hba *hisi_hba,
171 struct hisi_sas_slot *slot);
172 void (*phys_init)(struct hisi_hba *hisi_hba);
173 void (*phy_enable)(struct hisi_hba *hisi_hba, int phy_no);
174 void (*phy_disable)(struct hisi_hba *hisi_hba, int phy_no);
175 void (*phy_hard_reset)(struct hisi_hba *hisi_hba, int phy_no);
176 void (*phy_set_linkrate)(struct hisi_hba *hisi_hba, int phy_no,
177 struct sas_phy_linkrates *linkrates);
178 enum sas_linkrate (*phy_get_max_linkrate)(void);
179 void (*free_device)(struct hisi_hba *hisi_hba,
180 struct hisi_sas_device *dev);
181 int (*get_wideport_bitmap)(struct hisi_hba *hisi_hba, int port_id);
182 int (*soft_reset)(struct hisi_hba *hisi_hba);
183 int max_command_entries;
184 int complete_hdr_size;
188 /* This must be the first element, used by SHOST_TO_SAS_HA */
189 struct sas_ha_struct *p;
191 struct platform_device *pdev;
195 u32 ctrl_reset_sts_reg;
196 u32 ctrl_clock_ena_reg;
197 u32 refclk_frequency_mhz;
198 u8 sas_addr[SAS_ADDR_SIZE];
203 struct timer_list timer;
204 struct workqueue_struct *wq;
206 int slot_index_count;
207 unsigned long *slot_index_tags;
208 unsigned long reject_stp_links_msk;
211 struct sas_ha_struct sha;
212 struct Scsi_Host *shost;
214 struct hisi_sas_cq cq[HISI_SAS_MAX_QUEUES];
215 struct hisi_sas_dq dq[HISI_SAS_MAX_QUEUES];
216 struct hisi_sas_phy phy[HISI_SAS_MAX_PHYS];
217 struct hisi_sas_port port[HISI_SAS_MAX_PHYS];
220 struct hisi_sas_slot *slot_prep;
222 struct dma_pool *sge_page_pool;
223 struct hisi_sas_device devices[HISI_SAS_MAX_DEVICES];
224 struct dma_pool *command_table_pool;
225 struct dma_pool *status_buffer_pool;
226 struct hisi_sas_cmd_hdr *cmd_hdr[HISI_SAS_MAX_QUEUES];
227 dma_addr_t cmd_hdr_dma[HISI_SAS_MAX_QUEUES];
228 void *complete_hdr[HISI_SAS_MAX_QUEUES];
229 dma_addr_t complete_hdr_dma[HISI_SAS_MAX_QUEUES];
230 struct hisi_sas_initial_fis *initial_fis;
231 dma_addr_t initial_fis_dma;
232 struct hisi_sas_itct *itct;
234 struct hisi_sas_iost *iost;
236 struct hisi_sas_breakpoint *breakpoint;
237 dma_addr_t breakpoint_dma;
238 struct hisi_sas_breakpoint *sata_breakpoint;
239 dma_addr_t sata_breakpoint_dma;
240 struct hisi_sas_slot *slot_info;
242 const struct hisi_sas_hw *hw; /* Low level hw interface */
243 unsigned long sata_dev_bitmap[BITS_TO_LONGS(HISI_SAS_MAX_DEVICES)];
244 struct work_struct rst_work;
247 /* Generic HW DMA host memory structures */
248 /* Delivery queue header */
249 struct hisi_sas_cmd_hdr {
260 __le32 transfer_tags;
263 __le32 data_transfer_len;
266 __le32 first_burst_num;
275 __le64 cmd_table_addr;
278 __le64 sts_buffer_addr;
281 __le64 prd_table_addr;
284 __le64 dif_prd_table_addr;
287 struct hisi_sas_itct {
295 struct hisi_sas_iost {
302 struct hisi_sas_err_record {
306 struct hisi_sas_initial_fis {
307 struct hisi_sas_err_record err_record;
308 struct dev_to_host_fis fis;
312 struct hisi_sas_breakpoint {
313 u8 data[128]; /*io128 byte*/
316 struct hisi_sas_sge {
324 struct hisi_sas_command_table_smp {
328 struct hisi_sas_command_table_stp {
329 struct host_to_dev_fis command_fis;
331 u8 atapi_cdb[ATAPI_CDB_LEN];
334 #define HISI_SAS_SGE_PAGE_CNT SG_CHUNK_SIZE
335 struct hisi_sas_sge_page {
336 struct hisi_sas_sge sge[HISI_SAS_SGE_PAGE_CNT];
339 struct hisi_sas_command_table_ssp {
340 struct ssp_frame_hdr hdr;
343 struct ssp_command_iu task;
346 struct ssp_tmf_iu ssp_task;
347 struct xfer_rdy_iu xfer_rdy;
348 struct ssp_response_iu ssp_res;
352 union hisi_sas_command_table {
353 struct hisi_sas_command_table_ssp ssp;
354 struct hisi_sas_command_table_smp smp;
355 struct hisi_sas_command_table_stp stp;
358 extern struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port);
359 extern int hisi_sas_probe(struct platform_device *pdev,
360 const struct hisi_sas_hw *ops);
361 extern int hisi_sas_remove(struct platform_device *pdev);
363 extern void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy);
364 extern void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba,
365 struct sas_task *task,
366 struct hisi_sas_slot *slot);
367 extern void hisi_sas_init_mem(struct hisi_hba *hisi_hba);
368 extern void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,