1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * mtip32xx.h - Header file for the P320 SSD Block Driver
4 * Copyright (C) 2011 Micron Technology, Inc.
6 * Portions of this code were derived from works subjected to the
8 * Copyright (C) 2009 Integrated Device Technology, Inc.
11 #ifndef __MTIP32XX_H__
12 #define __MTIP32XX_H__
14 #include <linux/spinlock.h>
15 #include <linux/rwsem.h>
16 #include <linux/ata.h>
17 #include <linux/interrupt.h>
19 /* Offset of Subsystem Device ID in pci confoguration space */
20 #define PCI_SUBSYSTEM_DEVICEID 0x2E
22 /* offset of Device Control register in PCIe extended capabilites space */
23 #define PCIE_CONFIG_EXT_DEVICE_CONTROL_OFFSET 0x48
25 /* check for erase mode support during secure erase */
26 #define MTIP_SEC_ERASE_MODE 0x2
28 /* # of times to retry timed out/failed IOs */
29 #define MTIP_MAX_RETRIES 2
31 /* Various timeout values in ms */
32 #define MTIP_NCQ_CMD_TIMEOUT_MS 15000
33 #define MTIP_IOCTL_CMD_TIMEOUT_MS 5000
34 #define MTIP_INT_CMD_TIMEOUT_MS 5000
35 #define MTIP_QUIESCE_IO_TIMEOUT_MS (MTIP_NCQ_CMD_TIMEOUT_MS * \
36 (MTIP_MAX_RETRIES + 1))
38 /* check for timeouts every 500ms */
39 #define MTIP_TIMEOUT_CHECK_PERIOD 500
42 #define MTIP_FTL_REBUILD_OFFSET 142
43 #define MTIP_FTL_REBUILD_MAGIC 0xED51
44 #define MTIP_FTL_REBUILD_TIMEOUT_MS 2400000
46 /* unaligned IO handling */
47 #define MTIP_MAX_UNALIGNED_SLOTS 2
49 /* Macro to extract the tag bit number from a tag value. */
50 #define MTIP_TAG_BIT(tag) (tag & 0x1F)
53 * Macro to extract the tag index from a tag value. The index
54 * is used to access the correct s_active/Command Issue register based
57 #define MTIP_TAG_INDEX(tag) (tag >> 5)
60 * Maximum number of scatter gather entries
61 * a single command may have.
63 #define MTIP_MAX_SG 504
66 * Maximum number of slot groups (Command Issue & s_active registers)
67 * NOTE: This is the driver maximum; check dd->slot_groups for actual value.
69 #define MTIP_MAX_SLOT_GROUPS 8
71 /* Internal command tag. */
72 #define MTIP_TAG_INTERNAL 0
74 /* Micron Vendor ID & P320x SSD Device ID */
75 #define PCI_VENDOR_ID_MICRON 0x1344
76 #define P320H_DEVICE_ID 0x5150
77 #define P320M_DEVICE_ID 0x5151
78 #define P320S_DEVICE_ID 0x5152
79 #define P325M_DEVICE_ID 0x5153
80 #define P420H_DEVICE_ID 0x5160
81 #define P420M_DEVICE_ID 0x5161
82 #define P425M_DEVICE_ID 0x5163
84 /* Driver name and version strings */
85 #define MTIP_DRV_NAME "mtip32xx"
86 #define MTIP_DRV_VERSION "1.3.1"
88 /* Maximum number of minor device numbers per device. */
89 #define MTIP_MAX_MINORS 16
91 /* Maximum number of supported command slots. */
92 #define MTIP_MAX_COMMAND_SLOTS (MTIP_MAX_SLOT_GROUPS * 32)
95 * Per-tag bitfield size in longs.
96 * Linux bit manipulation functions
97 * (i.e. test_and_set_bit, find_next_zero_bit)
98 * manipulate memory in longs, so we try to make the math work.
99 * take the slot groups and find the number of longs, rounding up.
100 * Careful! i386 and x86_64 use different size longs!
102 #define U32_PER_LONG (sizeof(long) / sizeof(u32))
103 #define SLOTBITS_IN_LONGS ((MTIP_MAX_SLOT_GROUPS + \
104 (U32_PER_LONG-1))/U32_PER_LONG)
106 /* BAR number used to access the HBA registers. */
110 #define dbg_printk(format, arg...) \
111 printk(pr_fmt(format), ##arg);
113 #define dbg_printk(format, arg...)
116 #define MTIP_DFS_MAX_BUF_SIZE 1024
119 /* below are bit numbers in 'flags' defined in mtip_port */
120 MTIP_PF_IC_ACTIVE_BIT = 0, /* pio/ioctl */
121 MTIP_PF_EH_ACTIVE_BIT = 1, /* error handling */
122 MTIP_PF_SE_ACTIVE_BIT = 2, /* secure erase */
123 MTIP_PF_DM_ACTIVE_BIT = 3, /* download microcde */
124 MTIP_PF_TO_ACTIVE_BIT = 9, /* timeout handling */
125 MTIP_PF_PAUSE_IO = ((1 << MTIP_PF_IC_ACTIVE_BIT) |
126 (1 << MTIP_PF_EH_ACTIVE_BIT) |
127 (1 << MTIP_PF_SE_ACTIVE_BIT) |
128 (1 << MTIP_PF_DM_ACTIVE_BIT) |
129 (1 << MTIP_PF_TO_ACTIVE_BIT)),
130 MTIP_PF_HOST_CAP_64 = 10, /* cache HOST_CAP_64 */
132 MTIP_PF_SVC_THD_ACTIVE_BIT = 4,
133 MTIP_PF_ISSUE_CMDS_BIT = 5,
134 MTIP_PF_REBUILD_BIT = 6,
135 MTIP_PF_SVC_THD_STOP_BIT = 8,
137 MTIP_PF_SVC_THD_WORK = ((1 << MTIP_PF_EH_ACTIVE_BIT) |
138 (1 << MTIP_PF_ISSUE_CMDS_BIT) |
139 (1 << MTIP_PF_REBUILD_BIT) |
140 (1 << MTIP_PF_SVC_THD_STOP_BIT) |
141 (1 << MTIP_PF_TO_ACTIVE_BIT)),
143 /* below are bit numbers in 'dd_flag' defined in driver_data */
144 MTIP_DDF_SEC_LOCK_BIT = 0,
145 MTIP_DDF_REMOVE_PENDING_BIT = 1,
146 MTIP_DDF_OVER_TEMP_BIT = 2,
147 MTIP_DDF_WRITE_PROTECT_BIT = 3,
148 MTIP_DDF_CLEANUP_BIT = 5,
149 MTIP_DDF_RESUME_BIT = 6,
150 MTIP_DDF_INIT_DONE_BIT = 7,
151 MTIP_DDF_REBUILD_FAILED_BIT = 8,
153 MTIP_DDF_STOP_IO = ((1 << MTIP_DDF_REMOVE_PENDING_BIT) |
154 (1 << MTIP_DDF_SEC_LOCK_BIT) |
155 (1 << MTIP_DDF_OVER_TEMP_BIT) |
156 (1 << MTIP_DDF_WRITE_PROTECT_BIT) |
157 (1 << MTIP_DDF_REBUILD_FAILED_BIT)),
171 struct work_struct work;
175 } ____cacheline_aligned_in_smp;
177 #define DEFINE_HANDLER(group) \
178 void mtip_workq_sdbf##group(struct work_struct *work) \
180 struct mtip_work *w = (struct mtip_work *) work; \
181 mtip_workq_sdbfx(w->port, group, w->completed); \
184 /* Register Frame Information Structure (FIS), host to device. */
185 struct host_to_dev_fis {
188 * - 27h Register FIS, host to device.
189 * - 34h Register FIS, device to host.
190 * - 39h DMA Activate FIS, device to host.
191 * - 41h DMA Setup FIS, bi-directional.
192 * - 46h Data FIS, bi-directional.
193 * - 58h BIST Activate FIS, bi-directional.
194 * - 5Fh PIO Setup FIS, device to host.
195 * - A1h Set Device Bits FIS, device to host.
199 unsigned char command;
200 unsigned char features;
203 unsigned char lba_low;
204 unsigned char sector;
207 unsigned char lba_mid;
208 unsigned char cyl_low;
211 unsigned char lba_hi;
212 unsigned char cyl_hi;
215 unsigned char device;
220 unsigned char lba_low_ex;
221 unsigned char sector_ex;
224 unsigned char lba_mid_ex;
225 unsigned char cyl_low_ex;
228 unsigned char lba_hi_ex;
229 unsigned char cyl_hi_ex;
231 unsigned char features_ex;
233 unsigned char sect_count;
234 unsigned char sect_cnt_ex;
236 unsigned char control;
241 /* Command header structure. */
242 struct mtip_cmd_hdr {
245 * - Bits 31:16 Number of PRD entries.
246 * - Bits 15:8 Unused in this implementation.
247 * - Bit 7 Prefetch bit, informs the drive to prefetch PRD entries.
248 * - Bit 6 Write bit, should be set when writing data to the device.
249 * - Bit 5 Unused in this implementation.
250 * - Bits 4:0 Length of the command FIS in DWords (DWord = 4 bytes).
253 /* This field is unsed when using NCQ. */
259 * Lower 32 bits of the command table address associated with this
260 * header. The command table addresses must be 128 byte aligned.
264 * If 64 bit addressing is used this field is the upper 32 bits
265 * of the command table address associated with this command.
268 /* Reserved and unused. */
272 /* Command scatter gather structure (PRD). */
275 * Low 32 bits of the data buffer address. For P320 this
276 * address must be 8 byte aligned signified by bits 2:0 being
281 * When 64 bit addressing is used this field is the upper
282 * 32 bits of the data buffer address.
288 * Bit 31: interrupt when this data block has been transferred.
289 * Bits 30..22: reserved
290 * Bits 21..0: byte count (minus 1). For P320 the byte count must be
291 * 8 byte aligned signified by bits 2:0 being set to 1.
299 /* Structure used to describe a command. */
301 void *command; /* ptr to command table entry */
303 dma_addr_t command_dma; /* corresponding physical address */
305 int scatter_ents; /* Number of scatter list entries used */
307 int unaligned; /* command is unaligned on 4k boundary */
310 struct scatterlist sg[MTIP_MAX_SG]; /* Scatter list entries */
311 struct mtip_int_cmd *icmd;
314 int retries; /* The number of retries left for this command. */
316 int direction; /* Data transfer direction */
320 /* Structure used to describe a port. */
322 /* Pointer back to the driver data for this port. */
323 struct driver_data *dd;
325 * Used to determine if the data pointed to by the
326 * identify field is valid.
328 unsigned long identify_valid;
329 /* Base address of the memory mapped IO for the port. */
331 /* Array of pointers to the memory mapped s_active registers. */
332 void __iomem *s_active[MTIP_MAX_SLOT_GROUPS];
333 /* Array of pointers to the memory mapped completed registers. */
334 void __iomem *completed[MTIP_MAX_SLOT_GROUPS];
335 /* Array of pointers to the memory mapped Command Issue registers. */
336 void __iomem *cmd_issue[MTIP_MAX_SLOT_GROUPS];
338 * Pointer to the beginning of the command header memory as used
343 * Pointer to the beginning of the command header memory as used
346 dma_addr_t command_list_dma;
348 * Pointer to the beginning of the RX FIS memory as used
353 * Pointer to the beginning of the RX FIS memory as used
356 dma_addr_t rxfis_dma;
358 * Pointer to the DMA region for RX Fis, Identify, RLE10, and SMART
362 * DMA address of region for RX Fis, Identify, RLE10, and SMART
364 dma_addr_t block1_dma;
366 * Pointer to the beginning of the identify data memory as used
371 * Pointer to the beginning of the identify data memory as used
374 dma_addr_t identify_dma;
376 * Pointer to the beginning of a sector buffer that is used
377 * by the driver when issuing internal commands.
381 * Pointer to the beginning of a sector buffer that is used
382 * by the DMA when the driver issues internal commands.
384 dma_addr_t sector_buffer_dma;
387 dma_addr_t log_buf_dma;
390 dma_addr_t smart_buf_dma;
393 * used to queue commands when an internal command is in progress
394 * or error handling is active
396 unsigned long cmds_to_issue[SLOTBITS_IN_LONGS];
397 /* Used by mtip_service_thread to wait for an event */
398 wait_queue_head_t svc_wait;
400 * indicates the state of the port. Also, helps the service thread
401 * to determine its action on wake up.
405 * Timer used to complete commands that have been active for too long.
407 unsigned long ic_pause_timer;
409 /* Counter to control queue depth of unaligned IOs */
410 atomic_t cmd_slot_unal;
412 /* Spinlock for working around command-issue bug. */
413 spinlock_t cmd_issue_lock[MTIP_MAX_SLOT_GROUPS];
417 * Driver private data structure.
419 * One structure is allocated per probed device.
422 void __iomem *mmio; /* Base address of the HBA registers. */
424 int major; /* Major device number. */
426 int instance; /* Instance number. First device probed is 0, ... */
428 struct gendisk *disk; /* Pointer to our gendisk structure. */
430 struct pci_dev *pdev; /* Pointer to the PCI device structure. */
432 struct request_queue *queue; /* Our request queue. */
434 struct blk_mq_tag_set tags; /* blk_mq tags */
436 struct mtip_port *port; /* Pointer to the port data structure. */
438 unsigned product_type; /* magic value declaring the product type */
440 unsigned slot_groups; /* number of slot groups the product supports */
442 unsigned long index; /* Index to determine the disk name */
444 unsigned long dd_flag; /* NOTE: use atomic bit operations on this */
446 struct task_struct *mtip_svc_handler; /* task_struct of svc thd */
448 struct dentry *dfs_node;
452 int numa_node; /* NUMA support */
456 struct workqueue_struct *isr_workq;
458 atomic_t irq_workers_active;
460 struct mtip_work work[MTIP_MAX_SLOT_GROUPS];
464 int unal_qdepth; /* qdepth of unaligned IO queue */