Add support for sTec's pci-e flash card Kronos

Signed-off-by: NAkhil Bhansali <abhansali@stec-inc.com>
Signed-off-by: NRamprasad Chinthekindi <rchinthekindi@stec-inc.com>
Reviewed-by: NJeff Moyer <jmoyer@redhat.com>

Folded patch, contributions to clean up this driver from:

Jens Axboe
Dan Carpenter
Andrew Morton
Signed-off-by: NJens Axboe <axboe@kernel.dk>

drivers/block/Kconfig

@@ -316,6 +316,16 @@ config BLK_DEV_NVME
 	  To compile this driver as a module, choose M here: the
 	  module will be called nvme.
 
+config BLK_DEV_SKD
+	tristate "STEC S1120 Block Driver"
+	depends on PCI
+	depends on 64BIT
+	---help---
+	Saying Y or M here will enable support for the
+	STEC, Inc. S1120 PCIe SSD.
+
+	Use device /dev/skd$N amd /dev/skd$Np$M.
+
 config BLK_DEV_OSD
 	tristate "OSD object-as-blkdev support"
 	depends on SCSI_OSD_ULD

drivers/block/Makefile

@@ -23,6 +23,7 @@ obj-$(CONFIG_CDROM_PKTCDVD)	+= pktcdvd.o
 obj-$(CONFIG_MG_DISK)		+= mg_disk.o
 obj-$(CONFIG_SUNVDC)		+= sunvdc.o
 obj-$(CONFIG_BLK_DEV_NVME)	+= nvme.o
+obj-$(CONFIG_BLK_DEV_SKD)	+= skd.o
 obj-$(CONFIG_BLK_DEV_OSD)	+= osdblk.o
 
 obj-$(CONFIG_BLK_DEV_UMEM)	+= umem.o
@@ -43,4 +44,5 @@ obj-$(CONFIG_BLK_DEV_PCIESSD_MTIP32XX)	+= mtip32xx/
 obj-$(CONFIG_BLK_DEV_RSXX) += rsxx/
 
 nvme-y		:= nvme-core.o nvme-scsi.o
+skd-y		:= skd_main.o
 swim_mod-y	:= swim.o swim_asm.o

drivers/block/skd_s1120.h

+/* Copyright 2012 STEC, Inc.
+ *
+ * This file is licensed under the terms of the 3-clause
+ * BSD License (http://opensource.org/licenses/BSD-3-Clause)
+ * or the GNU GPL-2.0 (http://www.gnu.org/licenses/gpl-2.0.html),
+ * at your option. Both licenses are also available in the LICENSE file
+ * distributed with this project. This file may not be copied, modified,
+ * or distributed except in accordance with those terms.
+ */
+
+
+#ifndef SKD_S1120_H
+#define SKD_S1120_H
+
+#pragma pack(push, s1120_h, 1)
+
+/*
+ * Q-channel, 64-bit r/w
+ */
+#define FIT_Q_COMMAND               0x400u
+#define  FIT_QCMD_QID_MASK              (0x3 << 1)
+#define  FIT_QCMD_QID0                  (0x0 << 1)
+#define  FIT_QCMD_QID_NORMAL            FIT_QCMD_QID0
+#ifndef SKD_OMIT_FROM_SRC_DIST
+#define  FIT_QCMD_QID1                  (0x1 << 1)
+#define  FIT_QCMD_QID2                  (0x2 << 1)
+#define  FIT_QCMD_QID3                  (0x3 << 1)
+#endif /* SKD_OMIT_FROM_SRC_DIST */
+#define  FIT_QCMD_FLUSH_QUEUE           (0ull)      /* add QID */
+#define  FIT_QCMD_MSGSIZE_MASK          (0x3 << 4)
+#define  FIT_QCMD_MSGSIZE_64            (0x0 << 4)
+#define  FIT_QCMD_MSGSIZE_128           (0x1 << 4)
+#define  FIT_QCMD_MSGSIZE_256           (0x2 << 4)
+#define  FIT_QCMD_MSGSIZE_512           (0x3 << 4)
+#define  FIT_QCMD_BASE_ADDRESS_MASK     (0xFFFFFFFFFFFFFFC0ull)
+
+
+/*
+ * Control, 32-bit r/w
+ */
+#define FIT_CONTROL                 0x500u
+#ifndef SKD_OMIT_FROM_SRC_DIST
+#define  FIT_CR_HARD_RESET              (1u << 0u)
+#endif /* SKD_OMIT_FROM_SRC_DIST */
+#define  FIT_CR_SOFT_RESET              (1u << 1u)
+#ifndef SKD_OMIT_FROM_SRC_DIST
+#define	 FIT_CR_DIS_TIMESTAMPS		(1u << 6u)
+#endif /* SKD_OMIT_FROM_SRC_DIST */
+#define  FIT_CR_ENABLE_INTERRUPTS       (1u << 7u)
+
+/*
+ * Status, 32-bit, r/o
+ */
+#define FIT_STATUS			0x510u
+#define FIT_SR_DRIVE_STATE_MASK		0x000000FFu
+#ifndef SKD_OMIT_FROM_SRC_DIST
+#define	FIT_SR_SIGNATURE		(0xFF << 8)
+#define	FIT_SR_PIO_DMA			(1 << 16)
+#endif /* SKD_OMIT_FROM_SRC_DIST */
+#define FIT_SR_DRIVE_OFFLINE		0x00
+#define FIT_SR_DRIVE_INIT		0x01
+/* #define FIT_SR_DRIVE_READY		0x02 */
+#define FIT_SR_DRIVE_ONLINE		0x03
+#define FIT_SR_DRIVE_BUSY		0x04
+#define FIT_SR_DRIVE_FAULT		0x05
+#define FIT_SR_DRIVE_DEGRADED		0x06
+#define FIT_SR_PCIE_LINK_DOWN		0x07
+#define FIT_SR_DRIVE_SOFT_RESET		0x08
+#define FIT_SR_DRIVE_INIT_FAULT		0x09
+#define FIT_SR_DRIVE_BUSY_SANITIZE	0x0A
+#define FIT_SR_DRIVE_BUSY_ERASE		0x0B
+#define FIT_SR_DRIVE_FW_BOOTING		0x0C
+#define FIT_SR_DRIVE_NEED_FW_DOWNLOAD	0xFE
+#define FIT_SR_DEVICE_MISSING           0xFF
+#define FIT_SR__RESERVED		0xFFFFFF00u
+
+#ifndef SKD_OMIT_FROM_SRC_DIST
+/*
+ * FIT_STATUS - Status register data definition
+ */
+#define	FIT_SR_STATE_MASK		(0xFF << 0)
+#define	FIT_SR_SIGNATURE		(0xFF << 8)
+#define	FIT_SR_PIO_DMA			(1 << 16)
+#endif /* SKD_OMIT_FROM_SRC_DIST */
+
+
+/*
+ * Interrupt status, 32-bit r/w1c (w1c ==> write 1 to clear)
+ */
+#define FIT_INT_STATUS_HOST         0x520u
+#define  FIT_ISH_FW_STATE_CHANGE        (1u << 0u)
+#define  FIT_ISH_COMPLETION_POSTED      (1u << 1u)
+#define  FIT_ISH_MSG_FROM_DEV           (1u << 2u)
+#define  FIT_ISH_UNDEFINED_3            (1u << 3u)
+#define  FIT_ISH_UNDEFINED_4            (1u << 4u)
+#define  FIT_ISH_Q0_FULL                (1u << 5u)
+#define  FIT_ISH_Q1_FULL                (1u << 6u)
+#define  FIT_ISH_Q2_FULL                (1u << 7u)
+#define  FIT_ISH_Q3_FULL                (1u << 8u)
+#define  FIT_ISH_QCMD_FIFO_OVERRUN      (1u << 9u)
+#define  FIT_ISH_BAD_EXP_ROM_READ       (1u << 10u)
+
+
+#define FIT_INT_DEF_MASK	\
+		(FIT_ISH_FW_STATE_CHANGE | \
+		 FIT_ISH_COMPLETION_POSTED | \
+		 FIT_ISH_MSG_FROM_DEV | \
+		 FIT_ISH_Q0_FULL | \
+		 FIT_ISH_Q1_FULL | \
+		 FIT_ISH_Q2_FULL | \
+		 FIT_ISH_Q3_FULL | \
+		 FIT_ISH_QCMD_FIFO_OVERRUN | \
+		 FIT_ISH_BAD_EXP_ROM_READ)
+
+#define FIT_INT_QUEUE_FULL	\
+		(FIT_ISH_Q0_FULL | \
+		FIT_ISH_Q1_FULL | \
+		FIT_ISH_Q2_FULL | \
+		FIT_ISH_Q3_FULL)
+
+
+#define MSI_MSG_NWL_ERROR_0             0x00000000
+#define MSI_MSG_NWL_ERROR_1             0x00000001
+#define MSI_MSG_NWL_ERROR_2             0x00000002
+#define MSI_MSG_NWL_ERROR_3             0x00000003
+#define MSI_MSG_STATE_CHANGE            0x00000004
+#define MSI_MSG_COMPLETION_POSTED       0x00000005
+#define MSI_MSG_MSG_FROM_DEV            0x00000006
+#define MSI_MSG_RESERVED_0              0x00000007
+#define MSI_MSG_RESERVED_1              0x00000008
+#define MSI_MSG_QUEUE_0_FULL            0x00000009
+#define MSI_MSG_QUEUE_1_FULL            0x0000000A
+#define MSI_MSG_QUEUE_2_FULL            0x0000000B
+#define MSI_MSG_QUEUE_3_FULL            0x0000000C
+
+
+
+#define FIT_INT_RESERVED_MASK	\
+		(FIT_ISH_UNDEFINED_3 | \
+		FIT_ISH_UNDEFINED_4)
+/*
+ * Interrupt mask, 32-bit r/w
+ * Bit definitions are the same as FIT_INT_STATUS_HOST
+ */
+#define FIT_INT_MASK_HOST           0x528u
+
+
+/*
+ * Message to device, 32-bit r/w
+ */
+#define FIT_MSG_TO_DEVICE           0x540u
+
+/*
+ * Message from device, 32-bit, r/o
+ */
+#define FIT_MSG_FROM_DEVICE         0x548u
+
+
+/*
+ * 32-bit messages to/from device, composition/extraction macros
+ */
+#define FIT_MXD_CONS(TYPE, PARAM, DATA) \
+	((((TYPE)  & 0xFFu) << 24u) | \
+	(((PARAM) & 0xFFu) << 16u) | \
+	(((DATA)  & 0xFFFFu) << 0u))
+#define FIT_MXD_TYPE(MXD)               (((MXD) >> 24u) & 0xFFu)
+#define FIT_MXD_PARAM(MXD)              (((MXD) >> 16u) & 0xFFu)
+#define FIT_MXD_DATA(MXD)               (((MXD) >> 0u) & 0xFFFFu)
+
+
+/*
+ * Types of messages to/from device
+ */
+#define FIT_MTD_FITFW_INIT              0x01u
+#define FIT_MTD_GET_CMDQ_DEPTH          0x02u
+#define FIT_MTD_SET_COMPQ_DEPTH         0x03u
+#define FIT_MTD_SET_COMPQ_ADDR          0x04u
+#define FIT_MTD_ARM_QUEUE               0x05u
+#define FIT_MTD_CMD_LOG_HOST_ID         0x07u
+#define FIT_MTD_CMD_LOG_TIME_STAMP_LO   0x08u
+#define FIT_MTD_CMD_LOG_TIME_STAMP_HI   0x09u
+#define FIT_MFD_SMART_EXCEEDED          0x10u
+#define FIT_MFD_POWER_DOWN		        0x11u
+#define FIT_MFD_OFFLINE			        0x12u
+#define FIT_MFD_ONLINE			        0x13u
+#define FIT_MFD_FW_RESTARTING		    0x14u
+#define FIT_MFD_PM_ACTIVE		        0x15u
+#define FIT_MFD_PM_STANDBY		        0x16u
+#define FIT_MFD_PM_SLEEP		        0x17u
+#define FIT_MFD_CMD_PROGRESS		    0x18u
+
+#ifndef SKD_OMIT_FROM_SRC_DIST
+#define FIT_MTD_DEBUG                   0xFEu
+#define FIT_MFD_DEBUG                   0xFFu
+#endif /* SKD_OMIT_FROM_SRC_DIST */
+
+#define FIT_MFD_MASK			(0xFFu)
+#define FIT_MFD_DATA_MASK		(0xFFu)
+#define FIT_MFD_MSG(x)			(((x) >> 24) & FIT_MFD_MASK)
+#define FIT_MFD_DATA(x)			((x) & FIT_MFD_MASK)
+
+
+/*
+ * Extra arg to FIT_MSG_TO_DEVICE, 64-bit r/w
+ * Used to set completion queue address (FIT_MTD_SET_COMPQ_ADDR)
+ * (was Response buffer in docs)
+ */
+#define FIT_MSG_TO_DEVICE_ARG       0x580u
+
+/*
+ * Hardware (ASIC) version, 32-bit r/o
+ */
+#define FIT_HW_VERSION              0x588u
+
+/*
+ * Scatter/gather list descriptor.
+ * 32-bytes and must be aligned on a 32-byte boundary.
+ * All fields are in little endian order.
+ */
+struct fit_sg_descriptor {
+	uint32_t control;
+	uint32_t byte_count;
+	uint64_t host_side_addr;
+	uint64_t dev_side_addr;
+	uint64_t next_desc_ptr;
+};
+
+#define FIT_SGD_CONTROL_NOT_LAST    0x000u
+#define FIT_SGD_CONTROL_LAST        0x40Eu
+
+/*
+ * Header at the beginning of a FIT message. The header
+ * is followed by SSDI requests each 64 bytes.
+ * A FIT message can be up to 512 bytes long and must start
+ * on a 64-byte boundary.
+ */
+struct fit_msg_hdr {
+	uint8_t protocol_id;
+	uint8_t num_protocol_cmds_coalesced;
+	uint8_t _reserved[62];
+};
+
+#define FIT_PROTOCOL_ID_FIT     1
+#define FIT_PROTOCOL_ID_SSDI    2
+#define FIT_PROTOCOL_ID_SOFIT   3
+
+
+#define FIT_PROTOCOL_MINOR_VER(mtd_val) ((mtd_val >> 16) & 0xF)
+#define FIT_PROTOCOL_MAJOR_VER(mtd_val) ((mtd_val >> 20) & 0xF)
+
+#ifndef SKD_OMIT_FROM_SRC_DIST
+/*
+ * Format of a completion entry. The completion queue is circular
+ * and must have at least as many entries as the maximum number
+ * of commands that may be issued to the device.
+ *
+ * There are no head/tail pointers. The cycle value is used to
+ * infer the presence of new completion records.
+ * Initially the cycle in all entries is 0, the index is 0, and
+ * the cycle value to expect is 1. When completions are added
+ * their cycle values are set to 1. When the index wraps the
+ * cycle value to expect is incremented.
+ *
+ * Command_context is opaque and taken verbatim from the SSDI command.
+ * All other fields are big endian.
+ */
+#endif /* SKD_OMIT_FROM_SRC_DIST */
+#define FIT_PROTOCOL_VERSION_0          0
+
+/*
+ *  Protocol major version 1 completion entry.
+ *  The major protocol version is found in bits
+ *  20-23 of the FIT_MTD_FITFW_INIT response.
+ */
+struct fit_completion_entry_v1 {
+	uint32_t	num_returned_bytes;
+	uint16_t	tag;
+	uint8_t		status;  /* SCSI status */
+	uint8_t		cycle;
+};
+#define FIT_PROTOCOL_VERSION_1          1
+#define FIT_PROTOCOL_VERSION_CURRENT    FIT_PROTOCOL_VERSION_1
+
+struct fit_comp_error_info {
+	uint8_t		type:7; /* 00: Bits0-6 indicates the type of sense data. */
+	uint8_t		valid:1; /* 00: Bit 7 := 1 ==> info field is valid. */
+	uint8_t		reserved0; /* 01: Obsolete field */
+	uint8_t		key:4; /* 02: Bits0-3 indicate the sense key. */
+	uint8_t		reserved2:1; /* 02: Reserved bit. */
+	uint8_t		bad_length:1; /* 02: Incorrect Length Indicator */
+	uint8_t		end_medium:1; /* 02: End of Medium */
+	uint8_t		file_mark:1; /* 02: Filemark */
+	uint8_t		info[4]; /* 03: */
+	uint8_t		reserved1; /* 07: Additional Sense Length */
+	uint8_t		cmd_spec[4]; /* 08: Command Specific Information */
+	uint8_t		code; /* 0C: Additional Sense Code */
+	uint8_t		qual; /* 0D: Additional Sense Code Qualifier */
+	uint8_t		fruc; /* 0E: Field Replaceable Unit Code */
+	uint8_t		sks_high:7; /* 0F: Sense Key Specific (MSB) */
+	uint8_t		sks_valid:1; /* 0F: Sense Key Specific Valid */
+	uint16_t	sks_low; /* 10: Sense Key Specific (LSW) */
+	uint16_t	reserved3; /* 12: Part of additional sense bytes (unused) */
+	uint16_t	uec; /* 14: Additional Sense Bytes */
+	uint64_t	per; /* 16: Additional Sense Bytes */
+	uint8_t		reserved4[2]; /* 1E: Additional Sense Bytes (unused) */
+};
+
+
+/* Task management constants */
+#define SOFT_TASK_SIMPLE            0x00
+#define SOFT_TASK_HEAD_OF_QUEUE     0x01
+#define SOFT_TASK_ORDERED           0x02
+
+
+/* Version zero has the last 32 bits reserved,
+ * Version one has the last 32 bits sg_list_len_bytes;
+ */
+struct skd_command_header {
+	uint64_t	sg_list_dma_address;
+	uint16_t	tag;
+	uint8_t		attribute;
+	uint8_t		add_cdb_len;     /* In 32 bit words */
+	uint32_t	sg_list_len_bytes;
+};
+
+struct skd_scsi_request {
+	struct		skd_command_header hdr;
+	unsigned char	cdb[16];
+/*	unsigned char _reserved[16]; */
+};
+
+struct driver_inquiry_data {
+	uint8_t		peripheral_device_type:5;
+	uint8_t		qualifier:3;
+	uint8_t		page_code;
+	uint16_t	page_length;
+	uint16_t	pcie_bus_number;
+	uint8_t		pcie_device_number;
+	uint8_t		pcie_function_number;
+	uint8_t		pcie_link_speed;
+	uint8_t		pcie_link_lanes;
+	uint16_t	pcie_vendor_id;
+	uint16_t	pcie_device_id;
+	uint16_t	pcie_subsystem_vendor_id;
+	uint16_t	pcie_subsystem_device_id;
+	uint8_t		reserved1[2];
+	uint8_t		reserved2[3];
+	uint8_t		driver_version_length;
+	uint8_t		driver_version[0x14];
+};
+
+#pragma pack(pop, s1120_h)
+
+#endif /* SKD_S1120_H */