--- /dev/null
+/*
+ * Driver for the Micron P320 SSD
+ * Copyright (C) 2011 Micron Technology, Inc.
+ *
+ * Portions of this code were derived from works subjected to the
+ * following copyright:
+ * Copyright (C) 2009 Integrated Device Technology, Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/ata.h>
+#include <linux/delay.h>
+#include <linux/hdreg.h>
+#include <linux/uaccess.h>
+#include <linux/random.h>
+#include <linux/smp.h>
+#include <linux/compat.h>
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/genhd.h>
+#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
+#include <linux/bio.h>
+#include <linux/dma-mapping.h>
+#include <linux/idr.h>
+#include <linux/kthread.h>
+#include <../drivers/ata/ahci.h>
+#include <linux/export.h>
+#include <linux/debugfs.h>
+#include <linux/prefetch.h>
+#include "mtip32xx.h"
+
+#define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32)
+
+/* DMA region containing RX Fis, Identify, RLE10, and SMART buffers */
+#define AHCI_RX_FIS_SZ 0x100
+#define AHCI_RX_FIS_OFFSET 0x0
+#define AHCI_IDFY_SZ ATA_SECT_SIZE
+#define AHCI_IDFY_OFFSET 0x400
+#define AHCI_SECTBUF_SZ ATA_SECT_SIZE
+#define AHCI_SECTBUF_OFFSET 0x800
+#define AHCI_SMARTBUF_SZ ATA_SECT_SIZE
+#define AHCI_SMARTBUF_OFFSET 0xC00
+/* 0x100 + 0x200 + 0x200 + 0x200 is smaller than 4k but we pad it out */
+#define BLOCK_DMA_ALLOC_SZ 4096
+
+/* DMA region containing command table (should be 8192 bytes) */
+#define AHCI_CMD_SLOT_SZ sizeof(struct mtip_cmd_hdr)
+#define AHCI_CMD_TBL_SZ (MTIP_MAX_COMMAND_SLOTS * AHCI_CMD_SLOT_SZ)
+#define AHCI_CMD_TBL_OFFSET 0x0
+
+/* DMA region per command (contains header and SGL) */
+#define AHCI_CMD_TBL_HDR_SZ 0x80
+#define AHCI_CMD_TBL_HDR_OFFSET 0x0
+#define AHCI_CMD_TBL_SGL_SZ (MTIP_MAX_SG * sizeof(struct mtip_cmd_sg))
+#define AHCI_CMD_TBL_SGL_OFFSET AHCI_CMD_TBL_HDR_SZ
+#define CMD_DMA_ALLOC_SZ (AHCI_CMD_TBL_SGL_SZ + AHCI_CMD_TBL_HDR_SZ)
+
+
+#define HOST_CAP_NZDMA (1 << 19)
+#define HOST_HSORG 0xFC
+#define HSORG_DISABLE_SLOTGRP_INTR (1<<24)
+#define HSORG_DISABLE_SLOTGRP_PXIS (1<<16)
+#define HSORG_HWREV 0xFF00
+#define HSORG_STYLE 0x8
+#define HSORG_SLOTGROUPS 0x7
+
+#define PORT_COMMAND_ISSUE 0x38
+#define PORT_SDBV 0x7C
+
+#define PORT_OFFSET 0x100
+#define PORT_MEM_SIZE 0x80
+
+#define PORT_IRQ_ERR \
+ (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \
+ PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \
+ PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \
+ PORT_IRQ_OVERFLOW)
+#define PORT_IRQ_LEGACY \
+ (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS)
+#define PORT_IRQ_HANDLED \
+ (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \
+ PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \
+ PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)
+#define DEF_PORT_IRQ \
+ (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS)
+
+/* product numbers */
+#define MTIP_PRODUCT_UNKNOWN 0x00
+#define MTIP_PRODUCT_ASICFPGA 0x11
+
+/* Device instance number, incremented each time a device is probed. */
+static int instance;
+
+struct list_head online_list;
+struct list_head removing_list;
+spinlock_t dev_lock;
+
+/*
+ * Global variable used to hold the major block device number
+ * allocated in mtip_init().
+ */
+static int mtip_major;
+static struct dentry *dfs_parent;
+static struct dentry *dfs_device_status;
+
+static u32 cpu_use[NR_CPUS];
+
+static DEFINE_SPINLOCK(rssd_index_lock);
+static DEFINE_IDA(rssd_index_ida);
+
+static int mtip_block_initialize(struct driver_data *dd);
+
+#ifdef CONFIG_COMPAT
+struct mtip_compat_ide_task_request_s {
+ __u8 io_ports[8];
+ __u8 hob_ports[8];
+ ide_reg_valid_t out_flags;
+ ide_reg_valid_t in_flags;
+ int data_phase;
+ int req_cmd;
+ compat_ulong_t out_size;
+ compat_ulong_t in_size;
+};
+#endif
+
+/*
+ * This function check_for_surprise_removal is called
+ * while card is removed from the system and it will
+ * read the vendor id from the configration space
+ *
+ * @pdev Pointer to the pci_dev structure.
+ *
+ * return value
+ * true if device removed, else false
+ */
+static bool mtip_check_surprise_removal(struct pci_dev *pdev)
+{
+ u16 vendor_id = 0;
+ struct driver_data *dd = pci_get_drvdata(pdev);
+
+ if (dd->sr)
+ return true;
+
+ /* Read the vendorID from the configuration space */
+ pci_read_config_word(pdev, 0x00, &vendor_id);
+ if (vendor_id == 0xFFFF) {
+ dd->sr = true;
+ if (dd->queue)
+ set_bit(QUEUE_FLAG_DEAD, &dd->queue->queue_flags);
+ else
+ dev_warn(&dd->pdev->dev,
+ "%s: dd->queue is NULL\n", __func__);
+ if (dd->port) {
+ set_bit(MTIP_PF_SR_CLEANUP_BIT, &dd->port->flags);
+ wake_up_interruptible(&dd->port->svc_wait);
+ } else
+ dev_warn(&dd->pdev->dev,
+ "%s: dd->port is NULL\n", __func__);
+ return true; /* device removed */
+ }
+
+ return false; /* device present */
+}
+
+static struct mtip_cmd *mtip_get_int_command(struct driver_data *dd)
+{
+ struct request *rq;
+
+ rq = blk_mq_alloc_request(dd->queue, 0, __GFP_WAIT, true);
+ return blk_mq_rq_to_pdu(rq);
+}
+
+static void mtip_put_int_command(struct driver_data *dd, struct mtip_cmd *cmd)
+{
+ blk_put_request(blk_mq_rq_from_pdu(cmd));
+}
+
+/*
+ * Once we add support for one hctx per mtip group, this will change a bit
+ */
+static struct request *mtip_rq_from_tag(struct driver_data *dd,
+ unsigned int tag)
+{
+ struct blk_mq_hw_ctx *hctx = dd->queue->queue_hw_ctx[0];
+
+ return blk_mq_tag_to_rq(hctx->tags, tag);
+}
+
+static struct mtip_cmd *mtip_cmd_from_tag(struct driver_data *dd,
+ unsigned int tag)
+{
+ struct request *rq = mtip_rq_from_tag(dd, tag);
+
+ return blk_mq_rq_to_pdu(rq);
+}
+
+/*
+ * IO completion function.
+ *
+ * This completion function is called by the driver ISR when a
+ * command that was issued by the kernel completes. It first calls the
+ * asynchronous completion function which normally calls back into the block
+ * layer passing the asynchronous callback data, then unmaps the
+ * scatter list associated with the completed command, and finally
+ * clears the allocated bit associated with the completed command.
+ *
+ * @port Pointer to the port data structure.
+ * @tag Tag of the command.
+ * @data Pointer to driver_data.
+ * @status Completion status.
+ *
+ * return value
+ * None
+ */
+static void mtip_async_complete(struct mtip_port *port,
+ int tag, struct mtip_cmd *cmd, int status)
+{
+ struct driver_data *dd = port->dd;
+ struct request *rq;
+
+ if (unlikely(!dd) || unlikely(!port))
+ return;
+
+ if (unlikely(status == PORT_IRQ_TF_ERR)) {
+ dev_warn(&port->dd->pdev->dev,
+ "Command tag %d failed due to TFE\n", tag);
+ }
+
+ /* Unmap the DMA scatter list entries */
+ dma_unmap_sg(&dd->pdev->dev, cmd->sg, cmd->scatter_ents, cmd->direction);
+
+ rq = mtip_rq_from_tag(dd, tag);
+
+ if (unlikely(cmd->unaligned))
+ up(&port->cmd_slot_unal);
+
+ blk_mq_end_request(rq, status ? -EIO : 0);
+}
+
+/*
+ * Reset the HBA (without sleeping)
+ *
+ * @dd Pointer to the driver data structure.
+ *
+ * return value
+ * 0 The reset was successful.
+ * -1 The HBA Reset bit did not clear.
+ */
+static int mtip_hba_reset(struct driver_data *dd)
+{
+ unsigned long timeout;
+
+ /* Set the reset bit */
+ writel(HOST_RESET, dd->mmio + HOST_CTL);
+
+ /* Flush */
+ readl(dd->mmio + HOST_CTL);
+
+ /* Spin for up to 2 seconds, waiting for reset acknowledgement */
+ timeout = jiffies + msecs_to_jiffies(2000);
+ do {
+ mdelay(10);
+ if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))
+ return -1;
+
+ } while ((readl(dd->mmio + HOST_CTL) & HOST_RESET)
+ && time_before(jiffies, timeout));
+
+ if (readl(dd->mmio + HOST_CTL) & HOST_RESET)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * Issue a command to the hardware.
+ *
+ * Set the appropriate bit in the s_active and Command Issue hardware
+ * registers, causing hardware command processing to begin.
+ *
+ * @port Pointer to the port structure.
+ * @tag The tag of the command to be issued.
+ *
+ * return value
+ * None
+ */
+static inline void mtip_issue_ncq_command(struct mtip_port *port, int tag)
+{
+ int group = tag >> 5;
+
+ /* guard SACT and CI registers */
+ spin_lock(&port->cmd_issue_lock[group]);
+ writel((1 << MTIP_TAG_BIT(tag)),
+ port->s_active[MTIP_TAG_INDEX(tag)]);
+ writel((1 << MTIP_TAG_BIT(tag)),
+ port->cmd_issue[MTIP_TAG_INDEX(tag)]);
+ spin_unlock(&port->cmd_issue_lock[group]);
+}
+
+/*
+ * Enable/disable the reception of FIS
+ *
+ * @port Pointer to the port data structure
+ * @enable 1 to enable, 0 to disable
+ *
+ * return value
+ * Previous state: 1 enabled, 0 disabled
+ */
+static int mtip_enable_fis(struct mtip_port *port, int enable)
+{
+ u32 tmp;
+
+ /* enable FIS reception */
+ tmp = readl(port->mmio + PORT_CMD);
+ if (enable)
+ writel(tmp | PORT_CMD_FIS_RX, port->mmio + PORT_CMD);
+ else
+ writel(tmp & ~PORT_CMD_FIS_RX, port->mmio + PORT_CMD);
+
+ /* Flush */
+ readl(port->mmio + PORT_CMD);
+
+ return (((tmp & PORT_CMD_FIS_RX) == PORT_CMD_FIS_RX));
+}
+
+/*
+ * Enable/disable the DMA engine
+ *
+ * @port Pointer to the port data structure
+ * @enable 1 to enable, 0 to disable
+ *
+ * return value
+ * Previous state: 1 enabled, 0 disabled.
+ */
+static int mtip_enable_engine(struct mtip_port *port, int enable)
+{
+ u32 tmp;
+
+ /* enable FIS reception */
+ tmp = readl(port->mmio + PORT_CMD);
+ if (enable)
+ writel(tmp | PORT_CMD_START, port->mmio + PORT_CMD);
+ else
+ writel(tmp & ~PORT_CMD_START, port->mmio + PORT_CMD);
+
+ readl(port->mmio + PORT_CMD);
+ return (((tmp & PORT_CMD_START) == PORT_CMD_START));
+}
+
+/*
+ * Enables the port DMA engine and FIS reception.
+ *
+ * return value
+ * None
+ */
+static inline void mtip_start_port(struct mtip_port *port)
+{
+ /* Enable FIS reception */
+ mtip_enable_fis(port, 1);
+
+ /* Enable the DMA engine */
+ mtip_enable_engine(port, 1);
+}
+
+/*
+ * Deinitialize a port by disabling port interrupts, the DMA engine,
+ * and FIS reception.
+ *
+ * @port Pointer to the port structure
+ *
+ * return value
+ * None
+ */
+static inline void mtip_deinit_port(struct mtip_port *port)
+{
+ /* Disable interrupts on this port */
+ writel(0, port->mmio + PORT_IRQ_MASK);
+
+ /* Disable the DMA engine */
+ mtip_enable_engine(port, 0);
+
+ /* Disable FIS reception */
+ mtip_enable_fis(port, 0);
+}
+
+/*
+ * Initialize a port.
+ *
+ * This function deinitializes the port by calling mtip_deinit_port() and
+ * then initializes it by setting the command header and RX FIS addresses,
+ * clearing the SError register and any pending port interrupts before
+ * re-enabling the default set of port interrupts.
+ *
+ * @port Pointer to the port structure.
+ *
+ * return value
+ * None
+ */
+static void mtip_init_port(struct mtip_port *port)
+{
+ int i;
+ mtip_deinit_port(port);
+
+ /* Program the command list base and FIS base addresses */
+ if (readl(port->dd->mmio + HOST_CAP) & HOST_CAP_64) {
+ writel((port->command_list_dma >> 16) >> 16,
+ port->mmio + PORT_LST_ADDR_HI);
+ writel((port->rxfis_dma >> 16) >> 16,
+ port->mmio + PORT_FIS_ADDR_HI);
+ }
+
+ writel(port->command_list_dma & 0xFFFFFFFF,
+ port->mmio + PORT_LST_ADDR);
+ writel(port->rxfis_dma & 0xFFFFFFFF, port->mmio + PORT_FIS_ADDR);
+
+ /* Clear SError */
+ writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR);
+
+ /* reset the completed registers.*/
+ for (i = 0; i < port->dd->slot_groups; i++)
+ writel(0xFFFFFFFF, port->completed[i]);
+
+ /* Clear any pending interrupts for this port */
+ writel(readl(port->mmio + PORT_IRQ_STAT), port->mmio + PORT_IRQ_STAT);
+
+ /* Clear any pending interrupts on the HBA. */
+ writel(readl(port->dd->mmio + HOST_IRQ_STAT),
+ port->dd->mmio + HOST_IRQ_STAT);
+
+ /* Enable port interrupts */
+ writel(DEF_PORT_IRQ, port->mmio + PORT_IRQ_MASK);
+}
+
+/*
+ * Restart a port
+ *
+ * @port Pointer to the port data structure.
+ *
+ * return value
+ * None
+ */
+static void mtip_restart_port(struct mtip_port *port)
+{
+ unsigned long timeout;
+
+ /* Disable the DMA engine */
+ mtip_enable_engine(port, 0);
+
+ /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */
+ timeout = jiffies + msecs_to_jiffies(500);
+ while ((readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON)
+ && time_before(jiffies, timeout))
+ ;
+
+ if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
+ return;
+
+ /*
+ * Chip quirk: escalate to hba reset if
+ * PxCMD.CR not clear after 500 ms
+ */
+ if (readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) {
+ dev_warn(&port->dd->pdev->dev,
+ "PxCMD.CR not clear, escalating reset\n");
+
+ if (mtip_hba_reset(port->dd))
+ dev_err(&port->dd->pdev->dev,
+ "HBA reset escalation failed.\n");
+
+ /* 30 ms delay before com reset to quiesce chip */
+ mdelay(30);
+ }
+
+ dev_warn(&port->dd->pdev->dev, "Issuing COM reset\n");
+
+ /* Set PxSCTL.DET */
+ writel(readl(port->mmio + PORT_SCR_CTL) |
+ 1, port->mmio + PORT_SCR_CTL);
+ readl(port->mmio + PORT_SCR_CTL);
+
+ /* Wait 1 ms to quiesce chip function */
+ timeout = jiffies + msecs_to_jiffies(1);
+ while (time_before(jiffies, timeout))
+ ;
+
+ if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
+ return;
+
+ /* Clear PxSCTL.DET */
+ writel(readl(port->mmio + PORT_SCR_CTL) & ~1,
+ port->mmio + PORT_SCR_CTL);
+ readl(port->mmio + PORT_SCR_CTL);
+
+ /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */
+ timeout = jiffies + msecs_to_jiffies(500);
+ while (((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0)
+ && time_before(jiffies, timeout))
+ ;
+
+ if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
+ return;
+
+ if ((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0)
+ dev_warn(&port->dd->pdev->dev,
+ "COM reset failed\n");
+
+ mtip_init_port(port);
+ mtip_start_port(port);
+
+}
+
+static int mtip_device_reset(struct driver_data *dd)
+{
+ int rv = 0;
+
+ if (mtip_check_surprise_removal(dd->pdev))
+ return 0;
+
+ if (mtip_hba_reset(dd) < 0)
+ rv = -EFAULT;
+
+ mdelay(1);
+ mtip_init_port(dd->port);
+ mtip_start_port(dd->port);
+
+ /* Enable interrupts on the HBA. */
+ writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
+ dd->mmio + HOST_CTL);
+ return rv;
+}
+
+/*
+ * Helper function for tag logging
+ */
+static void print_tags(struct driver_data *dd,
+ char *msg,
+ unsigned long *tagbits,
+ int cnt)
+{
+ unsigned char tagmap[128];
+ int group, tagmap_len = 0;
+
+ memset(tagmap, 0, sizeof(tagmap));
+ for (group = SLOTBITS_IN_LONGS; group > 0; group--)
+ tagmap_len += sprintf(tagmap + tagmap_len, "%016lX ",
+ tagbits[group-1]);
+ dev_warn(&dd->pdev->dev,
+ "%d command(s) %s: tagmap [%s]", cnt, msg, tagmap);
+}
+
+/*
+ * Internal command completion callback function.
+ *
+ * This function is normally called by the driver ISR when an internal
+ * command completed. This function signals the command completion by
+ * calling complete().
+ *
+ * @port Pointer to the port data structure.
+ * @tag Tag of the command that has completed.
+ * @data Pointer to a completion structure.
+ * @status Completion status.
+ *
+ * return value
+ * None
+ */
+static void mtip_completion(struct mtip_port *port,
+ int tag, struct mtip_cmd *command, int status)
+{
+ struct completion *waiting = command->comp_data;
+ if (unlikely(status == PORT_IRQ_TF_ERR))
+ dev_warn(&port->dd->pdev->dev,
+ "Internal command %d completed with TFE\n", tag);
+
+ complete(waiting);
+}
+
+static void mtip_null_completion(struct mtip_port *port,
+ int tag, struct mtip_cmd *command, int status)
+{
+}
+
+static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
+ dma_addr_t buffer_dma, unsigned int sectors);
+static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
+ struct smart_attr *attrib);
+/*
+ * Handle an error.
+ *
+ * @dd Pointer to the DRIVER_DATA structure.
+ *
+ * return value
+ * None
+ */
+static void mtip_handle_tfe(struct driver_data *dd)
+{
+ int group, tag, bit, reissue, rv;
+ struct mtip_port *port;
+ struct mtip_cmd *cmd;
+ u32 completed;
+ struct host_to_dev_fis *fis;
+ unsigned long tagaccum[SLOTBITS_IN_LONGS];
+ unsigned int cmd_cnt = 0;
+ unsigned char *buf;
+ char *fail_reason = NULL;
+ int fail_all_ncq_write = 0, fail_all_ncq_cmds = 0;
+
+ dev_warn(&dd->pdev->dev, "Taskfile error\n");
+
+ port = dd->port;
+
+ set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
+
+ if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) &&
+ test_bit(MTIP_TAG_INTERNAL, port->allocated)) {
+ cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
+ dbg_printk(MTIP_DRV_NAME " TFE for the internal command\n");
+
+ if (cmd->comp_data && cmd->comp_func) {
+ cmd->comp_func(port, MTIP_TAG_INTERNAL,
+ cmd, PORT_IRQ_TF_ERR);
+ }
+ goto handle_tfe_exit;
+ }
+
+ /* clear the tag accumulator */
+ memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
+
+ /* Loop through all the groups */
+ for (group = 0; group < dd->slot_groups; group++) {
+ completed = readl(port->completed[group]);
+
+ dev_warn(&dd->pdev->dev, "g=%u, comp=%x\n", group, completed);
+
+ /* clear completed status register in the hardware.*/
+ writel(completed, port->completed[group]);
+
+ /* Process successfully completed commands */
+ for (bit = 0; bit < 32 && completed; bit++) {
+ if (!(completed & (1<<bit)))
+ continue;
+ tag = (group << 5) + bit;
+
+ /* Skip the internal command slot */
+ if (tag == MTIP_TAG_INTERNAL)
+ continue;
+
+ cmd = mtip_cmd_from_tag(dd, tag);
+ if (likely(cmd->comp_func)) {
+ set_bit(tag, tagaccum);
+ cmd_cnt++;
+ cmd->comp_func(port, tag, cmd, 0);
+ } else {
+ dev_err(&port->dd->pdev->dev,
+ "Missing completion func for tag %d",
+ tag);
+ if (mtip_check_surprise_removal(dd->pdev)) {
+ /* don't proceed further */
+ return;
+ }
+ }
+ }
+ }
+
+ print_tags(dd, "completed (TFE)", tagaccum, cmd_cnt);
+
+ /* Restart the port */
+ mdelay(20);
+ mtip_restart_port(port);
+
+ /* Trying to determine the cause of the error */
+ rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ,
+ dd->port->log_buf,
+ dd->port->log_buf_dma, 1);
+ if (rv) {
+ dev_warn(&dd->pdev->dev,
+ "Error in READ LOG EXT (10h) command\n");
+ /* non-critical error, don't fail the load */
+ } else {
+ buf = (unsigned char *)dd->port->log_buf;
+ if (buf[259] & 0x1) {
+ dev_info(&dd->pdev->dev,
+ "Write protect bit is set.\n");
+ set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag);
+ fail_all_ncq_write = 1;
+ fail_reason = "write protect";
+ }
+ if (buf[288] == 0xF7) {
+ dev_info(&dd->pdev->dev,
+ "Exceeded Tmax, drive in thermal shutdown.\n");
+ set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag);
+ fail_all_ncq_cmds = 1;
+ fail_reason = "thermal shutdown";
+ }
+ if (buf[288] == 0xBF) {
+ set_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag);
+ dev_info(&dd->pdev->dev,
+ "Drive indicates rebuild has failed. Secure erase required.\n");
+ fail_all_ncq_cmds = 1;
+ fail_reason = "rebuild failed";
+ }
+ }
+
+ /* clear the tag accumulator */
+ memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
+
+ /* Loop through all the groups */
+ for (group = 0; group < dd->slot_groups; group++) {
+ for (bit = 0; bit < 32; bit++) {
+ reissue = 1;
+ tag = (group << 5) + bit;
+ cmd = mtip_cmd_from_tag(dd, tag);
+
+ fis = (struct host_to_dev_fis *)cmd->command;
+
+ /* Should re-issue? */
+ if (tag == MTIP_TAG_INTERNAL ||
+ fis->command == ATA_CMD_SET_FEATURES)
+ reissue = 0;
+ else {
+ if (fail_all_ncq_cmds ||
+ (fail_all_ncq_write &&
+ fis->command == ATA_CMD_FPDMA_WRITE)) {
+ dev_warn(&dd->pdev->dev,
+ " Fail: %s w/tag %d [%s].\n",
+ fis->command == ATA_CMD_FPDMA_WRITE ?
+ "write" : "read",
+ tag,
+ fail_reason != NULL ?
+ fail_reason : "unknown");
+ if (cmd->comp_func) {
+ cmd->comp_func(port, tag,
+ cmd, -ENODATA);
+ }
+ continue;
+ }
+ }
+
+ /*
+ * First check if this command has
+ * exceeded its retries.
+ */
+ if (reissue && (cmd->retries-- > 0)) {
+
+ set_bit(tag, tagaccum);
+
+ /* Re-issue the command. */
+ mtip_issue_ncq_command(port, tag);
+
+ continue;
+ }
+
+ /* Retire a command that will not be reissued */
+ dev_warn(&port->dd->pdev->dev,
+ "retiring tag %d\n", tag);
+
+ if (cmd->comp_func)
+ cmd->comp_func(port, tag, cmd, PORT_IRQ_TF_ERR);
+ else
+ dev_warn(&port->dd->pdev->dev,
+ "Bad completion for tag %d\n",
+ tag);
+ }
+ }
+ print_tags(dd, "reissued (TFE)", tagaccum, cmd_cnt);
+
+handle_tfe_exit:
+ /* clear eh_active */
+ clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
+ wake_up_interruptible(&port->svc_wait);
+}
+
+/*
+ * Handle a set device bits interrupt
+ */
+static inline void mtip_workq_sdbfx(struct mtip_port *port, int group,
+ u32 completed)
+{
+ struct driver_data *dd = port->dd;
+ int tag, bit;
+ struct mtip_cmd *command;
+
+ if (!completed) {
+ WARN_ON_ONCE(!completed);
+ return;
+ }
+ /* clear completed status register in the hardware.*/
+ writel(completed, port->completed[group]);
+
+ /* Process completed commands. */
+ for (bit = 0; (bit < 32) && completed; bit++) {
+ if (completed & 0x01) {
+ tag = (group << 5) | bit;
+
+ /* skip internal command slot. */
+ if (unlikely(tag == MTIP_TAG_INTERNAL))
+ continue;
+
+ command = mtip_cmd_from_tag(dd, tag);
+ if (likely(command->comp_func))
+ command->comp_func(port, tag, command, 0);
+ else {
+ dev_dbg(&dd->pdev->dev,
+ "Null completion for tag %d",
+ tag);
+
+ if (mtip_check_surprise_removal(
+ dd->pdev)) {
+ return;
+ }
+ }
+ }
+ completed >>= 1;
+ }
+
+ /* If last, re-enable interrupts */
+ if (atomic_dec_return(&dd->irq_workers_active) == 0)
+ writel(0xffffffff, dd->mmio + HOST_IRQ_STAT);
+}
+
+/*
+ * Process legacy pio and d2h interrupts
+ */
+static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat)
+{
+ struct mtip_port *port = dd->port;
+ struct mtip_cmd *cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
+
+ if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) &&
+ (cmd != NULL) && !(readl(port->cmd_issue[MTIP_TAG_INTERNAL])
+ & (1 << MTIP_TAG_INTERNAL))) {
+ if (cmd->comp_func) {
+ cmd->comp_func(port, MTIP_TAG_INTERNAL, cmd, 0);
+ return;
+ }
+ }
+
+ return;
+}
+
+/*
+ * Demux and handle errors
+ */
+static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat)
+{
+
+ if (unlikely(port_stat & PORT_IRQ_CONNECT)) {
+ dev_warn(&dd->pdev->dev,
+ "Clearing PxSERR.DIAG.x\n");
+ writel((1 << 26), dd->port->mmio + PORT_SCR_ERR);
+ }
+
+ if (unlikely(port_stat & PORT_IRQ_PHYRDY)) {
+ dev_warn(&dd->pdev->dev,
+ "Clearing PxSERR.DIAG.n\n");
+ writel((1 << 16), dd->port->mmio + PORT_SCR_ERR);
+ }
+
+ if (unlikely(port_stat & ~PORT_IRQ_HANDLED)) {
+ dev_warn(&dd->pdev->dev,
+ "Port stat errors %x unhandled\n",
+ (port_stat & ~PORT_IRQ_HANDLED));
+ if (mtip_check_surprise_removal(dd->pdev))
+ return;
+ }
+ if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR))) {
+ set_bit(MTIP_PF_EH_ACTIVE_BIT, &dd->port->flags);
+ wake_up_interruptible(&dd->port->svc_wait);
+ }
+}
+
+static inline irqreturn_t mtip_handle_irq(struct driver_data *data)
+{
+ struct driver_data *dd = (struct driver_data *) data;
+ struct mtip_port *port = dd->port;
+ u32 hba_stat, port_stat;
+ int rv = IRQ_NONE;
+ int do_irq_enable = 1, i, workers;
+ struct mtip_work *twork;
+
+ hba_stat = readl(dd->mmio + HOST_IRQ_STAT);
+ if (hba_stat) {
+ rv = IRQ_HANDLED;
+
+ /* Acknowledge the interrupt status on the port.*/
+ port_stat = readl(port->mmio + PORT_IRQ_STAT);
+ writel(port_stat, port->mmio + PORT_IRQ_STAT);
+
+ /* Demux port status */
+ if (likely(port_stat & PORT_IRQ_SDB_FIS)) {
+ do_irq_enable = 0;
+ WARN_ON_ONCE(atomic_read(&dd->irq_workers_active) != 0);
+
+ /* Start at 1: group zero is always local? */
+ for (i = 0, workers = 0; i < MTIP_MAX_SLOT_GROUPS;
+ i++) {
+ twork = &dd->work[i];
+ twork->completed = readl(port->completed[i]);
+ if (twork->completed)
+ workers++;
+ }
+
+ atomic_set(&dd->irq_workers_active, workers);
+ if (workers) {
+ for (i = 1; i < MTIP_MAX_SLOT_GROUPS; i++) {
+ twork = &dd->work[i];
+ if (twork->completed)
+ queue_work_on(
+ twork->cpu_binding,
+ dd->isr_workq,
+ &twork->work);
+ }
+
+ if (likely(dd->work[0].completed))
+ mtip_workq_sdbfx(port, 0,
+ dd->work[0].completed);
+
+ } else {
+ /*
+ * Chip quirk: SDB interrupt but nothing
+ * to complete
+ */
+ do_irq_enable = 1;
+ }
+ }
+
+ if (unlikely(port_stat & PORT_IRQ_ERR)) {
+ if (unlikely(mtip_check_surprise_removal(dd->pdev))) {
+ /* don't proceed further */
+ return IRQ_HANDLED;
+ }
+ if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
+ &dd->dd_flag))
+ return rv;
+
+ mtip_process_errors(dd, port_stat & PORT_IRQ_ERR);
+ }
+
+ if (unlikely(port_stat & PORT_IRQ_LEGACY))
+ mtip_process_legacy(dd, port_stat & PORT_IRQ_LEGACY);
+ }
+
+ /* acknowledge interrupt */
+ if (unlikely(do_irq_enable))
+ writel(hba_stat, dd->mmio + HOST_IRQ_STAT);
+
+ return rv;
+}
+
+/*
+ * HBA interrupt subroutine.
+ *
+ * @irq IRQ number.
+ * @instance Pointer to the driver data structure.
+ *
+ * return value
+ * IRQ_HANDLED A HBA interrupt was pending and handled.
+ * IRQ_NONE This interrupt was not for the HBA.
+ */
+static irqreturn_t mtip_irq_handler(int irq, void *instance)
+{
+ struct driver_data *dd = instance;
+
+ return mtip_handle_irq(dd);
+}
+
+static void mtip_issue_non_ncq_command(struct mtip_port *port, int tag)
+{
+ writel(1 << MTIP_TAG_BIT(tag),
+ port->cmd_issue[MTIP_TAG_INDEX(tag)]);
+}
+
+static bool mtip_pause_ncq(struct mtip_port *port,
+ struct host_to_dev_fis *fis)
+{
+ struct host_to_dev_fis *reply;
+ unsigned long task_file_data;
+
+ reply = port->rxfis + RX_FIS_D2H_REG;
+ task_file_data = readl(port->mmio+PORT_TFDATA);
+
+ if (fis->command == ATA_CMD_SEC_ERASE_UNIT)
+ clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
+
+ if ((task_file_data & 1))
+ return false;
+
+ if (fis->command == ATA_CMD_SEC_ERASE_PREP) {
+ set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
+ set_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
+ port->ic_pause_timer = jiffies;
+ return true;
+ } else if ((fis->command == ATA_CMD_DOWNLOAD_MICRO) &&
+ (fis->features == 0x03)) {
+ set_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
+ port->ic_pause_timer = jiffies;
+ return true;
+ } else if ((fis->command == ATA_CMD_SEC_ERASE_UNIT) ||
+ ((fis->command == 0xFC) &&
+ (fis->features == 0x27 || fis->features == 0x72 ||
+ fis->features == 0x62 || fis->features == 0x26))) {
+ /* Com reset after secure erase or lowlevel format */
+ mtip_restart_port(port);
+ return false;
+ }
+
+ return false;
+}
+
+/*
+ * Wait for port to quiesce
+ *
+ * @port Pointer to port data structure
+ * @timeout Max duration to wait (ms)
+ *
+ * return value
+ * 0 Success
+ * -EBUSY Commands still active
+ */
+static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
+{
+ unsigned long to;
+ unsigned int n;
+ unsigned int active = 1;
+
+ blk_mq_stop_hw_queues(port->dd->queue);
+
+ to = jiffies + msecs_to_jiffies(timeout);
+ do {
+ if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags) &&
+ test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
+ msleep(20);
+ continue; /* svc thd is actively issuing commands */
+ }
+
+ msleep(100);
+ if (mtip_check_surprise_removal(port->dd->pdev))
+ goto err_fault;
+ if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
+ goto err_fault;
+
+ /*
+ * Ignore s_active bit 0 of array element 0.
+ * This bit will always be set
+ */
+ active = readl(port->s_active[0]) & 0xFFFFFFFE;
+ for (n = 1; n < port->dd->slot_groups; n++)
+ active |= readl(port->s_active[n]);
+
+ if (!active)
+ break;
+ } while (time_before(jiffies, to));
+
+ blk_mq_start_stopped_hw_queues(port->dd->queue, true);
+ return active ? -EBUSY : 0;
+err_fault:
+ blk_mq_start_stopped_hw_queues(port->dd->queue, true);
+ return -EFAULT;
+}
+
+/*
+ * Execute an internal command and wait for the completion.
+ *
+ * @port Pointer to the port data structure.
+ * @fis Pointer to the FIS that describes the command.
+ * @fis_len Length in WORDS of the FIS.
+ * @buffer DMA accessible for command data.
+ * @buf_len Length, in bytes, of the data buffer.
+ * @opts Command header options, excluding the FIS length
+ * and the number of PRD entries.
+ * @timeout Time in ms to wait for the command to complete.
+ *
+ * return value
+ * 0 Command completed successfully.
+ * -EFAULT The buffer address is not correctly aligned.
+ * -EBUSY Internal command or other IO in progress.
+ * -EAGAIN Time out waiting for command to complete.
+ */
+static int mtip_exec_internal_command(struct mtip_port *port,
+ struct host_to_dev_fis *fis,
+ int fis_len,
+ dma_addr_t buffer,
+ int buf_len,
+ u32 opts,
+ gfp_t atomic,
+ unsigned long timeout)
+{
+ struct mtip_cmd_sg *command_sg;
+ DECLARE_COMPLETION_ONSTACK(wait);
+ struct mtip_cmd *int_cmd;
+ struct driver_data *dd = port->dd;
+ int rv = 0;
+
+ /* Make sure the buffer is 8 byte aligned. This is asic specific. */
+ if (buffer & 0x00000007) {
+ dev_err(&dd->pdev->dev, "SG buffer is not 8 byte aligned\n");
+ return -EFAULT;
+ }
+
+ int_cmd = mtip_get_int_command(dd);
+
+ set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
+ port->ic_pause_timer = 0;
+
+ clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
+ clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
+
+ if (atomic == GFP_KERNEL) {
+ if (fis->command != ATA_CMD_STANDBYNOW1) {
+ /* wait for io to complete if non atomic */
+ if (mtip_quiesce_io(port,
+ MTIP_QUIESCE_IO_TIMEOUT_MS) < 0) {
+ dev_warn(&dd->pdev->dev,
+ "Failed to quiesce IO\n");
+ mtip_put_int_command(dd, int_cmd);
+ clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
+ wake_up_interruptible(&port->svc_wait);
+ return -EBUSY;
+ }
+ }
+
+ /* Set the completion function and data for the command. */
+ int_cmd->comp_data = &wait;
+ int_cmd->comp_func = mtip_completion;
+
+ } else {
+ /* Clear completion - we're going to poll */
+ int_cmd->comp_data = NULL;
+ int_cmd->comp_func = mtip_null_completion;
+ }
+
+ /* Copy the command to the command table */
+ memcpy(int_cmd->command, fis, fis_len*4);
+
+ /* Populate the SG list */
+ int_cmd->command_header->opts =
+ __force_bit2int cpu_to_le32(opts | fis_len);
+ if (buf_len) {
+ command_sg = int_cmd->command + AHCI_CMD_TBL_HDR_SZ;
+
+ command_sg->info =
+ __force_bit2int cpu_to_le32((buf_len-1) & 0x3FFFFF);
+ command_sg->dba =
+ __force_bit2int cpu_to_le32(buffer & 0xFFFFFFFF);
+ command_sg->dba_upper =
+ __force_bit2int cpu_to_le32((buffer >> 16) >> 16);
+
+ int_cmd->command_header->opts |=
+ __force_bit2int cpu_to_le32((1 << 16));
+ }
+
+ /* Populate the command header */
+ int_cmd->command_header->byte_count = 0;
+
+ /* Issue the command to the hardware */
+ mtip_issue_non_ncq_command(port, MTIP_TAG_INTERNAL);
+
+ if (atomic == GFP_KERNEL) {
+ /* Wait for the command to complete or timeout. */
+ if ((rv = wait_for_completion_interruptible_timeout(
+ &wait,
+ msecs_to_jiffies(timeout))) <= 0) {
+ if (rv == -ERESTARTSYS) { /* interrupted */
+ dev_err(&dd->pdev->dev,
+ "Internal command [%02X] was interrupted after %lu ms\n",
+ fis->command, timeout);
+ rv = -EINTR;
+ goto exec_ic_exit;
+ } else if (rv == 0) /* timeout */
+ dev_err(&dd->pdev->dev,
+ "Internal command did not complete [%02X] within timeout of %lu ms\n",
+ fis->command, timeout);
+ else
+ dev_err(&dd->pdev->dev,
+ "Internal command [%02X] wait returned code [%d] after %lu ms - unhandled\n",
+ fis->command, rv, timeout);
+
+ if (mtip_check_surprise_removal(dd->pdev) ||
+ test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
+ &dd->dd_flag)) {
+ dev_err(&dd->pdev->dev,
+ "Internal command [%02X] wait returned due to SR\n",
+ fis->command);
+ rv = -ENXIO;
+ goto exec_ic_exit;
+ }
+ mtip_device_reset(dd); /* recover from timeout issue */
+ rv = -EAGAIN;
+ goto exec_ic_exit;
+ }
+ } else {
+ u32 hba_stat, port_stat;
+
+ /* Spin for <timeout> checking if command still outstanding */
+ timeout = jiffies + msecs_to_jiffies(timeout);
+ while ((readl(port->cmd_issue[MTIP_TAG_INTERNAL])
+ & (1 << MTIP_TAG_INTERNAL))
+ && time_before(jiffies, timeout)) {
+ if (mtip_check_surprise_removal(dd->pdev)) {
+ rv = -ENXIO;
+ goto exec_ic_exit;
+ }
+ if ((fis->command != ATA_CMD_STANDBYNOW1) &&
+ test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
+ &dd->dd_flag)) {
+ rv = -ENXIO;
+ goto exec_ic_exit;
+ }
+ port_stat = readl(port->mmio + PORT_IRQ_STAT);
+ if (!port_stat)
+ continue;
+
+ if (port_stat & PORT_IRQ_ERR) {
+ dev_err(&dd->pdev->dev,
+ "Internal command [%02X] failed\n",
+ fis->command);
+ mtip_device_reset(dd);
+ rv = -EIO;
+ goto exec_ic_exit;
+ } else {
+ writel(port_stat, port->mmio + PORT_IRQ_STAT);
+ hba_stat = readl(dd->mmio + HOST_IRQ_STAT);
+ if (hba_stat)
+ writel(hba_stat,
+ dd->mmio + HOST_IRQ_STAT);
+ }
+ break;
+ }
+ }
+
+ if (readl(port->cmd_issue[MTIP_TAG_INTERNAL])
+ & (1 << MTIP_TAG_INTERNAL)) {
+ rv = -ENXIO;
+ if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) {
+ mtip_device_reset(dd);
+ rv = -EAGAIN;
+ }
+ }
+exec_ic_exit:
+ /* Clear the allocated and active bits for the internal command. */
+ mtip_put_int_command(dd, int_cmd);
+ if (rv >= 0 && mtip_pause_ncq(port, fis)) {
+ /* NCQ paused */
+ return rv;
+ }
+ clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
+ wake_up_interruptible(&port->svc_wait);
+
+ return rv;
+}
+
+/*
+ * Byte-swap ATA ID strings.
+ *
+ * ATA identify data contains strings in byte-swapped 16-bit words.
+ * They must be swapped (on all architectures) to be usable as C strings.
+ * This function swaps bytes in-place.
+ *
+ * @buf The buffer location of the string
+ * @len The number of bytes to swap
+ *
+ * return value
+ * None
+ */
+static inline void ata_swap_string(u16 *buf, unsigned int len)
+{
+ int i;
+ for (i = 0; i < (len/2); i++)
+ be16_to_cpus(&buf[i]);
+}
+
+static void mtip_set_timeout(struct driver_data *dd,
+ struct host_to_dev_fis *fis,
+ unsigned int *timeout, u8 erasemode)
+{
+ switch (fis->command) {
+ case ATA_CMD_DOWNLOAD_MICRO:
+ *timeout = 120000; /* 2 minutes */
+ break;
+ case ATA_CMD_SEC_ERASE_UNIT:
+ case 0xFC:
+ if (erasemode)
+ *timeout = ((*(dd->port->identify + 90) * 2) * 60000);
+ else
+ *timeout = ((*(dd->port->identify + 89) * 2) * 60000);
+ break;
+ case ATA_CMD_STANDBYNOW1:
+ *timeout = 120000; /* 2 minutes */
+ break;
+ case 0xF7:
+ case 0xFA:
+ *timeout = 60000; /* 60 seconds */
+ break;
+ case ATA_CMD_SMART:
+ *timeout = 15000; /* 15 seconds */
+ break;
+ default:
+ *timeout = MTIP_IOCTL_CMD_TIMEOUT_MS;
+ break;
+ }
+}
+
+/*
+ * Request the device identity information.
+ *
+ * If a user space buffer is not specified, i.e. is NULL, the
+ * identify information is still read from the drive and placed
+ * into the identify data buffer (@e port->identify) in the
+ * port data structure.
+ * When the identify buffer contains valid identify information @e
+ * port->identify_valid is non-zero.
+ *
+ * @port Pointer to the port structure.
+ * @user_buffer A user space buffer where the identify data should be
+ * copied.
+ *
+ * return value
+ * 0 Command completed successfully.
+ * -EFAULT An error occurred while coping data to the user buffer.
+ * -1 Command failed.
+ */
+static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer)
+{
+ int rv = 0;
+ struct host_to_dev_fis fis;
+
+ if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
+ return -EFAULT;
+
+ /* Build the FIS. */
+ memset(&fis, 0, sizeof(struct host_to_dev_fis));
+ fis.type = 0x27;
+ fis.opts = 1 << 7;
+ fis.command = ATA_CMD_ID_ATA;
+
+ /* Set the identify information as invalid. */
+ port->identify_valid = 0;
+
+ /* Clear the identify information. */
+ memset(port->identify, 0, sizeof(u16) * ATA_ID_WORDS);
+
+ /* Execute the command. */
+ if (mtip_exec_internal_command(port,
+ &fis,
+ 5,
+ port->identify_dma,
+ sizeof(u16) * ATA_ID_WORDS,
+ 0,
+ GFP_KERNEL,
+ MTIP_INT_CMD_TIMEOUT_MS)
+ < 0) {
+ rv = -1;
+ goto out;
+ }
+
+ /*
+ * Perform any necessary byte-swapping. Yes, the kernel does in fact
+ * perform field-sensitive swapping on the string fields.
+ * See the kernel use of ata_id_string() for proof of this.
+ */
+#ifdef __LITTLE_ENDIAN
+ ata_swap_string(port->identify + 27, 40); /* model string*/
+ ata_swap_string(port->identify + 23, 8); /* firmware string*/
+ ata_swap_string(port->identify + 10, 20); /* serial# string*/
+#else
+ {
+ int i;
+ for (i = 0; i < ATA_ID_WORDS; i++)
+ port->identify[i] = le16_to_cpu(port->identify[i]);
+ }
+#endif
+
+ /* Check security locked state */
+ if (port->identify[128] & 0x4)
+ set_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
+ else
+ clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
+
+#ifdef MTIP_TRIM /* Disabling TRIM support temporarily */
+ /* Demux ID.DRAT & ID.RZAT to determine trim support */
+ if (port->identify[69] & (1 << 14) && port->identify[69] & (1 << 5))
+ port->dd->trim_supp = true;
+ else
+#endif
+ port->dd->trim_supp = false;
+
+ /* Set the identify buffer as valid. */
+ port->identify_valid = 1;
+
+ if (user_buffer) {
+ if (copy_to_user(
+ user_buffer,
+ port->identify,
+ ATA_ID_WORDS * sizeof(u16))) {
+ rv = -EFAULT;
+ goto out;
+ }
+ }
+
+out:
+ return rv;
+}
+
+/*
+ * Issue a standby immediate command to the device.
+ *
+ * @port Pointer to the port structure.
+ *
+ * return value
+ * 0 Command was executed successfully.
+ * -1 An error occurred while executing the command.
+ */
+static int mtip_standby_immediate(struct mtip_port *port)
+{
+ int rv;
+ struct host_to_dev_fis fis;
+ unsigned long start;
+ unsigned int timeout;
+
+ /* Build the FIS. */
+ memset(&fis, 0, sizeof(struct host_to_dev_fis));
+ fis.type = 0x27;
+ fis.opts = 1 << 7;
+ fis.command = ATA_CMD_STANDBYNOW1;
+
+ mtip_set_timeout(port->dd, &fis, &timeout, 0);
+
+ start = jiffies;
+ rv = mtip_exec_internal_command(port,
+ &fis,
+ 5,
+ 0,
+ 0,
+ 0,
+ GFP_ATOMIC,
+ timeout);
+ dbg_printk(MTIP_DRV_NAME "Time taken to complete standby cmd: %d ms\n",
+ jiffies_to_msecs(jiffies - start));
+ if (rv)
+ dev_warn(&port->dd->pdev->dev,
+ "STANDBY IMMEDIATE command failed.\n");
+
+ return rv;
+}
+
+/*
+ * Issue a READ LOG EXT command to the device.
+ *
+ * @port pointer to the port structure.
+ * @page page number to fetch
+ * @buffer pointer to buffer
+ * @buffer_dma dma address corresponding to @buffer
+ * @sectors page length to fetch, in sectors
+ *
+ * return value
+ * @rv return value from mtip_exec_internal_command()
+ */
+static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
+ dma_addr_t buffer_dma, unsigned int sectors)
+{
+ struct host_to_dev_fis fis;
+
+ memset(&fis, 0, sizeof(struct host_to_dev_fis));
+ fis.type = 0x27;
+ fis.opts = 1 << 7;
+ fis.command = ATA_CMD_READ_LOG_EXT;
+ fis.sect_count = sectors & 0xFF;
+ fis.sect_cnt_ex = (sectors >> 8) & 0xFF;
+ fis.lba_low = page;
+ fis.lba_mid = 0;
+ fis.device = ATA_DEVICE_OBS;
+
+ memset(buffer, 0, sectors * ATA_SECT_SIZE);
+
+ return mtip_exec_internal_command(port,
+ &fis,
+ 5,
+ buffer_dma,
+ sectors * ATA_SECT_SIZE,
+ 0,
+ GFP_ATOMIC,
+ MTIP_INT_CMD_TIMEOUT_MS);
+}
+
+/*
+ * Issue a SMART READ DATA command to the device.
+ *
+ * @port pointer to the port structure.
+ * @buffer pointer to buffer
+ * @buffer_dma dma address corresponding to @buffer
+ *
+ * return value
+ * @rv return value from mtip_exec_internal_command()
+ */
+static int mtip_get_smart_data(struct mtip_port *port, u8 *buffer,
+ dma_addr_t buffer_dma)
+{
+ struct host_to_dev_fis fis;
+
+ memset(&fis, 0, sizeof(struct host_to_dev_fis));
+ fis.type = 0x27;
+ fis.opts = 1 << 7;
+ fis.command = ATA_CMD_SMART;
+ fis.features = 0xD0;
+ fis.sect_count = 1;
+ fis.lba_mid = 0x4F;
+ fis.lba_hi = 0xC2;
+ fis.device = ATA_DEVICE_OBS;
+
+ return mtip_exec_internal_command(port,
+ &fis,
+ 5,
+ buffer_dma,
+ ATA_SECT_SIZE,
+ 0,
+ GFP_ATOMIC,
+ 15000);
+}
+
+/*
+ * Get the value of a smart attribute
+ *
+ * @port pointer to the port structure
+ * @id attribute number
+ * @attrib pointer to return attrib information corresponding to @id
+ *
+ * return value
+ * -EINVAL NULL buffer passed or unsupported attribute @id.
+ * -EPERM Identify data not valid, SMART not supported or not enabled
+ */
+static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
+ struct smart_attr *attrib)
+{
+ int rv, i;
+ struct smart_attr *pattr;
+
+ if (!attrib)
+ return -EINVAL;
+
+ if (!port->identify_valid) {
+ dev_warn(&port->dd->pdev->dev, "IDENTIFY DATA not valid\n");
+ return -EPERM;
+ }
+ if (!(port->identify[82] & 0x1)) {
+ dev_warn(&port->dd->pdev->dev, "SMART not supported\n");
+ return -EPERM;
+ }
+ if (!(port->identify[85] & 0x1)) {
+ dev_warn(&port->dd->pdev->dev, "SMART not enabled\n");
+ return -EPERM;
+ }
+
+ memset(port->smart_buf, 0, ATA_SECT_SIZE);
+ rv = mtip_get_smart_data(port, port->smart_buf, port->smart_buf_dma);
+ if (rv) {
+ dev_warn(&port->dd->pdev->dev, "Failed to ge SMART data\n");
+ return rv;
+ }
+
+ pattr = (struct smart_attr *)(port->smart_buf + 2);
+ for (i = 0; i < 29; i++, pattr++)
+ if (pattr->attr_id == id) {
+ memcpy(attrib, pattr, sizeof(struct smart_attr));
+ break;
+ }
+
+ if (i == 29) {
+ dev_warn(&port->dd->pdev->dev,
+ "Query for invalid SMART attribute ID\n");
+ rv = -EINVAL;
+ }
+
+ return rv;
+}
+
+/*
+ * Trim unused sectors
+ *
+ * @dd pointer to driver_data structure
+ * @lba starting lba
+ * @len # of 512b sectors to trim
+ *
+ * return value
+ * -ENOMEM Out of dma memory
+ * -EINVAL Invalid parameters passed in, trim not supported
+ * -EIO Error submitting trim request to hw
+ */
+static int mtip_send_trim(struct driver_data *dd, unsigned int lba,
+ unsigned int len)
+{
+ int i, rv = 0;
+ u64 tlba, tlen, sect_left;
+ struct mtip_trim_entry *buf;
+ dma_addr_t dma_addr;
+ struct host_to_dev_fis fis;
+
+ if (!len || dd->trim_supp == false)
+ return -EINVAL;
+
+ /* Trim request too big */
+ WARN_ON(len > (MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES));
+
+ /* Trim request not aligned on 4k boundary */
+ WARN_ON(len % 8 != 0);
+
+ /* Warn if vu_trim structure is too big */
+ WARN_ON(sizeof(struct mtip_trim) > ATA_SECT_SIZE);
+
+ /* Allocate a DMA buffer for the trim structure */
+ buf = dmam_alloc_coherent(&dd->pdev->dev, ATA_SECT_SIZE, &dma_addr,
+ GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+ memset(buf, 0, ATA_SECT_SIZE);
+
+ for (i = 0, sect_left = len, tlba = lba;
+ i < MTIP_MAX_TRIM_ENTRIES && sect_left;
+ i++) {
+ tlen = (sect_left >= MTIP_MAX_TRIM_ENTRY_LEN ?
+ MTIP_MAX_TRIM_ENTRY_LEN :
+ sect_left);
+ buf[i].lba = __force_bit2int cpu_to_le32(tlba);
+ buf[i].range = __force_bit2int cpu_to_le16(tlen);
+ tlba += tlen;
+ sect_left -= tlen;
+ }
+ WARN_ON(sect_left != 0);
+
+ /* Build the fis */
+ memset(&fis, 0, sizeof(struct host_to_dev_fis));
+ fis.type = 0x27;
+ fis.opts = 1 << 7;
+ fis.command = 0xfb;
+ fis.features = 0x60;
+ fis.sect_count = 1;
+ fis.device = ATA_DEVICE_OBS;
+
+ if (mtip_exec_internal_command(dd->port,
+ &fis,
+ 5,
+ dma_addr,
+ ATA_SECT_SIZE,
+ 0,
+ GFP_KERNEL,
+ MTIP_TRIM_TIMEOUT_MS) < 0)
+ rv = -EIO;
+
+ dmam_free_coherent(&dd->pdev->dev, ATA_SECT_SIZE, buf, dma_addr);
+ return rv;
+}
+
+/*
+ * Get the drive capacity.
+ *
+ * @dd Pointer to the device data structure.
+ * @sectors Pointer to the variable that will receive the sector count.
+ *
+ * return value
+ * 1 Capacity was returned successfully.
+ * 0 The identify information is invalid.
+ */
+static bool mtip_hw_get_capacity(struct driver_data *dd, sector_t *sectors)
+{
+ struct mtip_port *port = dd->port;
+ u64 total, raw0, raw1, raw2, raw3;
+ raw0 = port->identify[100];
+ raw1 = port->identify[101];
+ raw2 = port->identify[102];
+ raw3 = port->identify[103];
+ total = raw0 | raw1<<16 | raw2<<32 | raw3<<48;
+ *sectors = total;
+ return (bool) !!port->identify_valid;
+}
+
+/*
+ * Display the identify command data.
+ *
+ * @port Pointer to the port data structure.
+ *
+ * return value
+ * None
+ */
+static void mtip_dump_identify(struct mtip_port *port)
+{
+ sector_t sectors;
+ unsigned short revid;
+ char cbuf[42];
+
+ if (!port->identify_valid)
+ return;
+
+ strlcpy(cbuf, (char *)(port->identify+10), 21);
+ dev_info(&port->dd->pdev->dev,
+ "Serial No.: %s\n", cbuf);
+
+ strlcpy(cbuf, (char *)(port->identify+23), 9);
+ dev_info(&port->dd->pdev->dev,
+ "Firmware Ver.: %s\n", cbuf);
+
+ strlcpy(cbuf, (char *)(port->identify+27), 41);
+ dev_info(&port->dd->pdev->dev, "Model: %s\n", cbuf);
+
+ dev_info(&port->dd->pdev->dev, "Security: %04x %s\n",
+ port->identify[128],
+ port->identify[128] & 0x4 ? "(LOCKED)" : "");
+
+ if (mtip_hw_get_capacity(port->dd, §ors))
+ dev_info(&port->dd->pdev->dev,
+ "Capacity: %llu sectors (%llu MB)\n",
+ (u64)sectors,
+ ((u64)sectors) * ATA_SECT_SIZE >> 20);
+
+ pci_read_config_word(port->dd->pdev, PCI_REVISION_ID, &revid);
+ switch (revid & 0xFF) {
+ case 0x1:
+ strlcpy(cbuf, "A0", 3);
+ break;
+ case 0x3:
+ strlcpy(cbuf, "A2", 3);
+ break;
+ default:
+ strlcpy(cbuf, "?", 2);
+ break;
+ }
+ dev_info(&port->dd->pdev->dev,
+ "Card Type: %s\n", cbuf);
+}
+
+/*
+ * Map the commands scatter list into the command table.
+ *
+ * @command Pointer to the command.
+ * @nents Number of scatter list entries.
+ *
+ * return value
+ * None
+ */
+static inline void fill_command_sg(struct driver_data *dd,
+ struct mtip_cmd *command,
+ int nents)
+{
+ int n;
+ unsigned int dma_len;
+ struct mtip_cmd_sg *command_sg;
+ struct scatterlist *sg = command->sg;
+
+ command_sg = command->command + AHCI_CMD_TBL_HDR_SZ;
+
+ for (n = 0; n < nents; n++) {
+ dma_len = sg_dma_len(sg);
+ if (dma_len > 0x400000)
+ dev_err(&dd->pdev->dev,
+ "DMA segment length truncated\n");
+ command_sg->info = __force_bit2int
+ cpu_to_le32((dma_len-1) & 0x3FFFFF);
+ command_sg->dba = __force_bit2int
+ cpu_to_le32(sg_dma_address(sg));
+ command_sg->dba_upper = __force_bit2int
+ cpu_to_le32((sg_dma_address(sg) >> 16) >> 16);
+ command_sg++;
+ sg++;
+ }
+}
+
+/*
+ * @brief Execute a drive command.
+ *
+ * return value 0 The command completed successfully.
+ * return value -1 An error occurred while executing the command.
+ */
+static int exec_drive_task(struct mtip_port *port, u8 *command)
+{
+ struct host_to_dev_fis fis;
+ struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG);
+ unsigned int to;
+
+ /* Build the FIS. */
+ memset(&fis, 0, sizeof(struct host_to_dev_fis));
+ fis.type = 0x27;
+ fis.opts = 1 << 7;
+ fis.command = command[0];
+ fis.features = command[1];
+ fis.sect_count = command[2];
+ fis.sector = command[3];
+ fis.cyl_low = command[4];
+ fis.cyl_hi = command[5];
+ fis.device = command[6] & ~0x10; /* Clear the dev bit*/
+
+ mtip_set_timeout(port->dd, &fis, &to, 0);
+
+ dbg_printk(MTIP_DRV_NAME " %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n",
+ __func__,
+ command[0],
+ command[1],
+ command[2],
+ command[3],
+ command[4],
+ command[5],
+ command[6]);
+
+ /* Execute the command. */
+ if (mtip_exec_internal_command(port,
+ &fis,
+ 5,
+ 0,
+ 0,
+ 0,
+ GFP_KERNEL,
+ to) < 0) {
+ return -1;
+ }
+
+ command[0] = reply->command; /* Status*/
+ command[1] = reply->features; /* Error*/
+ command[4] = reply->cyl_low;
+ command[5] = reply->cyl_hi;
+
+ dbg_printk(MTIP_DRV_NAME " %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n",
+ __func__,
+ command[0],
+ command[1],
+ command[4],
+ command[5]);
+
+ return 0;
+}
+
+/*
+ * @brief Execute a drive command.
+ *
+ * @param port Pointer to the port data structure.
+ * @param command Pointer to the user specified command parameters.
+ * @param user_buffer Pointer to the user space buffer where read sector
+ * data should be copied.
+ *
+ * return value 0 The command completed successfully.
+ * return value -EFAULT An error occurred while copying the completion
+ * data to the user space buffer.
+ * return value -1 An error occurred while executing the command.
+ */
+static int exec_drive_command(struct mtip_port *port, u8 *command,
+ void __user *user_buffer)
+{
+ struct host_to_dev_fis fis;
+ struct host_to_dev_fis *reply;
+ u8 *buf = NULL;
+ dma_addr_t dma_addr = 0;
+ int rv = 0, xfer_sz = command[3];
+ unsigned int to;
+
+ if (xfer_sz) {
+ if (!user_buffer)
+ return -EFAULT;
+
+ buf = dmam_alloc_coherent(&port->dd->pdev->dev,
+ ATA_SECT_SIZE * xfer_sz,
+ &dma_addr,
+ GFP_KERNEL);
+ if (!buf) {
+ dev_err(&port->dd->pdev->dev,
+ "Memory allocation failed (%d bytes)\n",
+ ATA_SECT_SIZE * xfer_sz);
+ return -ENOMEM;
+ }
+ memset(buf, 0, ATA_SECT_SIZE * xfer_sz);
+ }
+
+ /* Build the FIS. */
+ memset(&fis, 0, sizeof(struct host_to_dev_fis));
+ fis.type = 0x27;
+ fis.opts = 1 << 7;
+ fis.command = command[0];
+ fis.features = command[2];
+ fis.sect_count = command[3];
+ if (fis.command == ATA_CMD_SMART) {
+ fis.sector = command[1];
+ fis.cyl_low = 0x4F;
+ fis.cyl_hi = 0xC2;
+ }
+
+ mtip_set_timeout(port->dd, &fis, &to, 0);
+
+ if (xfer_sz)
+ reply = (port->rxfis + RX_FIS_PIO_SETUP);
+ else
+ reply = (port->rxfis + RX_FIS_D2H_REG);
+
+ dbg_printk(MTIP_DRV_NAME
+ " %s: User Command: cmd %x, sect %x, "
+ "feat %x, sectcnt %x\n",
+ __func__,
+ command[0],
+ command[1],
+ command[2],
+ command[3]);
+
+ /* Execute the command. */
+ if (mtip_exec_internal_command(port,
+ &fis,
+ 5,
+ (xfer_sz ? dma_addr : 0),
+ (xfer_sz ? ATA_SECT_SIZE * xfer_sz : 0),
+ 0,
+ GFP_KERNEL,
+ to)
+ < 0) {
+ rv = -EFAULT;
+ goto exit_drive_command;
+ }
+
+ /* Collect the completion status. */
+ command[0] = reply->command; /* Status*/
+ command[1] = reply->features; /* Error*/
+ command[2] = reply->sect_count;
+
+ dbg_printk(MTIP_DRV_NAME
+ " %s: Completion Status: stat %x, "
+ "err %x, nsect %x\n",
+ __func__,
+ command[0],
+ command[1],
+ command[2]);
+
+ if (xfer_sz) {
+ if (copy_to_user(user_buffer,
+ buf,
+ ATA_SECT_SIZE * command[3])) {
+ rv = -EFAULT;
+ goto exit_drive_command;
+ }
+ }
+exit_drive_command:
+ if (buf)
+ dmam_free_coherent(&port->dd->pdev->dev,
+ ATA_SECT_SIZE * xfer_sz, buf, dma_addr);
+ return rv;
+}
+
+/*
+ * Indicates whether a command has a single sector payload.
+ *
+ * @command passed to the device to perform the certain event.
+ * @features passed to the device to perform the certain event.
+ *
+ * return value
+ * 1 command is one that always has a single sector payload,
+ * regardless of the value in the Sector Count field.
+ * 0 otherwise
+ *
+ */
+static unsigned int implicit_sector(unsigned char command,
+ unsigned char features)
+{
+ unsigned int rv = 0;
+
+ /* list of commands that have an implicit sector count of 1 */
+ switch (command) {
+ case ATA_CMD_SEC_SET_PASS:
+ case ATA_CMD_SEC_UNLOCK:
+ case ATA_CMD_SEC_ERASE_PREP:
+ case ATA_CMD_SEC_ERASE_UNIT:
+ case ATA_CMD_SEC_FREEZE_LOCK:
+ case ATA_CMD_SEC_DISABLE_PASS:
+ case ATA_CMD_PMP_READ:
+ case ATA_CMD_PMP_WRITE:
+ rv = 1;
+ break;
+ case ATA_CMD_SET_MAX:
+ if (features == ATA_SET_MAX_UNLOCK)
+ rv = 1;
+ break;
+ case ATA_CMD_SMART:
+ if ((features == ATA_SMART_READ_VALUES) ||
+ (features == ATA_SMART_READ_THRESHOLDS))
+ rv = 1;
+ break;
+ case ATA_CMD_CONF_OVERLAY:
+ if ((features == ATA_DCO_IDENTIFY) ||
+ (features == ATA_DCO_SET))
+ rv = 1;
+ break;
+ }
+ return rv;
+}
+
+/*
+ * Executes a taskfile
+ * See ide_taskfile_ioctl() for derivation
+ */
+static int exec_drive_taskfile(struct driver_data *dd,
+ void __user *buf,
+ ide_task_request_t *req_task,
+ int outtotal)
+{
+ struct host_to_dev_fis fis;
+ struct host_to_dev_fis *reply;
+ u8 *outbuf = NULL;
+ u8 *inbuf = NULL;
+ dma_addr_t outbuf_dma = 0;
+ dma_addr_t inbuf_dma = 0;
+ dma_addr_t dma_buffer = 0;
+ int err = 0;
+ unsigned int taskin = 0;
+ unsigned int taskout = 0;
+ u8 nsect = 0;
+ unsigned int timeout;
+ unsigned int force_single_sector;
+ unsigned int transfer_size;
+ unsigned long task_file_data;
+ int intotal = outtotal + req_task->out_size;
+ int erasemode = 0;
+
+ taskout = req_task->out_size;
+ taskin = req_task->in_size;
+ /* 130560 = 512 * 0xFF*/
+ if (taskin > 130560 || taskout > 130560) {
+ err = -EINVAL;
+ goto abort;
+ }
+
+ if (taskout) {
+ outbuf = kzalloc(taskout, GFP_KERNEL);
+ if (outbuf == NULL) {
+ err = -ENOMEM;
+ goto abort;
+ }
+ if (copy_from_user(outbuf, buf + outtotal, taskout)) {
+ err = -EFAULT;
+ goto abort;
+ }
+ outbuf_dma = pci_map_single(dd->pdev,
+ outbuf,
+ taskout,
+ DMA_TO_DEVICE);
+ if (outbuf_dma == 0) {
+ err = -ENOMEM;
+ goto abort;
+ }
+ dma_buffer = outbuf_dma;
+ }
+
+ if (taskin) {
+ inbuf = kzalloc(taskin, GFP_KERNEL);
+ if (inbuf == NULL) {
+ err = -ENOMEM;
+ goto abort;
+ }
+
+ if (copy_from_user(inbuf, buf + intotal, taskin)) {
+ err = -EFAULT;
+ goto abort;
+ }
+ inbuf_dma = pci_map_single(dd->pdev,
+ inbuf,
+ taskin, DMA_FROM_DEVICE);
+ if (inbuf_dma == 0) {
+ err = -ENOMEM;
+ goto abort;
+ }
+ dma_buffer = inbuf_dma;
+ }
+
+ /* only supports PIO and non-data commands from this ioctl. */
+ switch (req_task->data_phase) {
+ case TASKFILE_OUT:
+ nsect = taskout / ATA_SECT_SIZE;
+ reply = (dd->port->rxfis + RX_FIS_PIO_SETUP);
+ break;
+ case TASKFILE_IN:
+ reply = (dd->port->rxfis + RX_FIS_PIO_SETUP);
+ break;
+ case TASKFILE_NO_DATA:
+ reply = (dd->port->rxfis + RX_FIS_D2H_REG);
+ break;
+ default:
+ err = -EINVAL;
+ goto abort;
+ }
+
+ /* Build the FIS. */
+ memset(&fis, 0, sizeof(struct host_to_dev_fis));
+
+ fis.type = 0x27;
+ fis.opts = 1 << 7;
+ fis.command = req_task->io_ports[7];
+ fis.features = req_task->io_ports[1];
+ fis.sect_count = req_task->io_ports[2];
+ fis.lba_low = req_task->io_ports[3];
+ fis.lba_mid = req_task->io_ports[4];
+ fis.lba_hi = req_task->io_ports[5];
+ /* Clear the dev bit*/
+ fis.device = req_task->io_ports[6] & ~0x10;
+
+ if ((req_task->in_flags.all == 0) && (req_task->out_flags.all & 1)) {
+ req_task->in_flags.all =
+ IDE_TASKFILE_STD_IN_FLAGS |
+ (IDE_HOB_STD_IN_FLAGS << 8);
+ fis.lba_low_ex = req_task->hob_ports[3];
+ fis.lba_mid_ex = req_task->hob_ports[4];
+ fis.lba_hi_ex = req_task->hob_ports[5];
+ fis.features_ex = req_task->hob_ports[1];
+ fis.sect_cnt_ex = req_task->hob_ports[2];
+
+ } else {
+ req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
+ }
+
+ force_single_sector = implicit_sector(fis.command, fis.features);
+
+ if ((taskin || taskout) && (!fis.sect_count)) {
+ if (nsect)
+ fis.sect_count = nsect;
+ else {
+ if (!force_single_sector) {
+ dev_warn(&dd->pdev->dev,
+ "data movement but "
+ "sect_count is 0\n");
+ err = -EINVAL;
+ goto abort;
+ }
+ }
+ }
+
+ dbg_printk(MTIP_DRV_NAME
+ " %s: cmd %x, feat %x, nsect %x,"
+ " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x,"
+ " head/dev %x\n",
+ __func__,
+ fis.command,
+ fis.features,
+ fis.sect_count,
+ fis.lba_low,
+ fis.lba_mid,
+ fis.lba_hi,
+ fis.device);
+
+ /* check for erase mode support during secure erase.*/
+ if ((fis.command == ATA_CMD_SEC_ERASE_UNIT) && outbuf &&
+ (outbuf[0] & MTIP_SEC_ERASE_MODE)) {
+ erasemode = 1;
+ }
+
+ mtip_set_timeout(dd, &fis, &timeout, erasemode);
+
+ /* Determine the correct transfer size.*/
+ if (force_single_sector)
+ transfer_size = ATA_SECT_SIZE;
+ else
+ transfer_size = ATA_SECT_SIZE * fis.sect_count;
+
+ /* Execute the command.*/
+ if (mtip_exec_internal_command(dd->port,
+ &fis,
+ 5,
+ dma_buffer,
+ transfer_size,
+ 0,
+ GFP_KERNEL,
+ timeout) < 0) {
+ err = -EIO;
+ goto abort;
+ }
+
+ task_file_data = readl(dd->port->mmio+PORT_TFDATA);
+
+ if ((req_task->data_phase == TASKFILE_IN) && !(task_file_data & 1)) {
+ reply = dd->port->rxfis + RX_FIS_PIO_SETUP;
+ req_task->io_ports[7] = reply->control;
+ } else {
+ reply = dd->port->rxfis + RX_FIS_D2H_REG;
+ req_task->io_ports[7] = reply->command;
+ }
+
+ /* reclaim the DMA buffers.*/
+ if (inbuf_dma)
+ pci_unmap_single(dd->pdev, inbuf_dma,
+ taskin, DMA_FROM_DEVICE);
+ if (outbuf_dma)
+ pci_unmap_single(dd->pdev, outbuf_dma,
+ taskout, DMA_TO_DEVICE);
+ inbuf_dma = 0;
+ outbuf_dma = 0;
+
+ /* return the ATA registers to the caller.*/
+ req_task->io_ports[1] = reply->features;
+ req_task->io_ports[2] = reply->sect_count;
+ req_task->io_ports[3] = reply->lba_low;
+ req_task->io_ports[4] = reply->lba_mid;
+ req_task->io_ports[5] = reply->lba_hi;
+ req_task->io_ports[6] = reply->device;
+
+ if (req_task->out_flags.all & 1) {
+
+ req_task->hob_ports[3] = reply->lba_low_ex;
+ req_task->hob_ports[4] = reply->lba_mid_ex;
+ req_task->hob_ports[5] = reply->lba_hi_ex;
+ req_task->hob_ports[1] = reply->features_ex;
+ req_task->hob_ports[2] = reply->sect_cnt_ex;
+ }
+ dbg_printk(MTIP_DRV_NAME
+ " %s: Completion: stat %x,"
+ "err %x, sect_cnt %x, lbalo %x,"
+ "lbamid %x, lbahi %x, dev %x\n",
+ __func__,
+ req_task->io_ports[7],
+ req_task->io_ports[1],
+ req_task->io_ports[2],
+ req_task->io_ports[3],
+ req_task->io_ports[4],
+ req_task->io_ports[5],
+ req_task->io_ports[6]);
+
+ if (taskout) {
+ if (copy_to_user(buf + outtotal, outbuf, taskout)) {
+ err = -EFAULT;
+ goto abort;
+ }
+ }
+ if (taskin) {
+ if (copy_to_user(buf + intotal, inbuf, taskin)) {
+ err = -EFAULT;
+ goto abort;
+ }
+ }
+abort:
+ if (inbuf_dma)
+ pci_unmap_single(dd->pdev, inbuf_dma,
+ taskin, DMA_FROM_DEVICE);
+ if (outbuf_dma)
+ pci_unmap_single(dd->pdev, outbuf_dma,
+ taskout, DMA_TO_DEVICE);
+ kfree(outbuf);
+ kfree(inbuf);
+
+ return err;
+}
+
+/*
+ * Handle IOCTL calls from the Block Layer.
+ *
+ * This function is called by the Block Layer when it receives an IOCTL
+ * command that it does not understand. If the IOCTL command is not supported
+ * this function returns -ENOTTY.
+ *
+ * @dd Pointer to the driver data structure.
+ * @cmd IOCTL command passed from the Block Layer.
+ * @arg IOCTL argument passed from the Block Layer.
+ *
+ * return value
+ * 0 The IOCTL completed successfully.
+ * -ENOTTY The specified command is not supported.
+ * -EFAULT An error occurred copying data to a user space buffer.
+ * -EIO An error occurred while executing the command.
+ */
+static int mtip_hw_ioctl(struct driver_data *dd, unsigned int cmd,
+ unsigned long arg)
+{
+ switch (cmd) {
+ case HDIO_GET_IDENTITY:
+ {
+ if (copy_to_user((void __user *)arg, dd->port->identify,
+ sizeof(u16) * ATA_ID_WORDS))
+ return -EFAULT;
+ break;
+ }
+ case HDIO_DRIVE_CMD:
+ {
+ u8 drive_command[4];
+
+ /* Copy the user command info to our buffer. */
+ if (copy_from_user(drive_command,
+ (void __user *) arg,
+ sizeof(drive_command)))
+ return -EFAULT;
+
+ /* Execute the drive command. */
+ if (exec_drive_command(dd->port,
+ drive_command,
+ (void __user *) (arg+4)))
+ return -EIO;
+
+ /* Copy the status back to the users buffer. */
+ if (copy_to_user((void __user *) arg,
+ drive_command,
+ sizeof(drive_command)))
+ return -EFAULT;
+
+ break;
+ }
+ case HDIO_DRIVE_TASK:
+ {
+ u8 drive_command[7];
+
+ /* Copy the user command info to our buffer. */
+ if (copy_from_user(drive_command,
+ (void __user *) arg,
+ sizeof(drive_command)))
+ return -EFAULT;
+
+ /* Execute the drive command. */
+ if (exec_drive_task(dd->port, drive_command))
+ return -EIO;
+
+ /* Copy the status back to the users buffer. */
+ if (copy_to_user((void __user *) arg,
+ drive_command,
+ sizeof(drive_command)))
+ return -EFAULT;
+
+ break;
+ }
+ case HDIO_DRIVE_TASKFILE: {
+ ide_task_request_t req_task;
+ int ret, outtotal;
+
+ if (copy_from_user(&req_task, (void __user *) arg,
+ sizeof(req_task)))
+ return -EFAULT;
+
+ outtotal = sizeof(req_task);
+
+ ret = exec_drive_taskfile(dd, (void __user *) arg,
+ &req_task, outtotal);
+
+ if (copy_to_user((void __user *) arg, &req_task,
+ sizeof(req_task)))
+ return -EFAULT;
+
+ return ret;
+ }
+
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * Submit an IO to the hw
+ *
+ * This function is called by the block layer to issue an io
+ * to the device. Upon completion, the callback function will
+ * be called with the data parameter passed as the callback data.
+ *
+ * @dd Pointer to the driver data structure.
+ * @start First sector to read.
+ * @nsect Number of sectors to read.
+ * @nents Number of entries in scatter list for the read command.
+ * @tag The tag of this read command.
+ * @callback Pointer to the function that should be called
+ * when the read completes.
+ * @data Callback data passed to the callback function
+ * when the read completes.
+ * @dir Direction (read or write)
+ *
+ * return value
+ * None
+ */
+static void mtip_hw_submit_io(struct driver_data *dd, struct request *rq,
+ struct mtip_cmd *command, int nents,
+ struct blk_mq_hw_ctx *hctx)
+{
+ struct host_to_dev_fis *fis;
+ struct mtip_port *port = dd->port;
+ int dma_dir = rq_data_dir(rq) == READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+ u64 start = blk_rq_pos(rq);
+ unsigned int nsect = blk_rq_sectors(rq);
+
+ /* Map the scatter list for DMA access */
+ nents = dma_map_sg(&dd->pdev->dev, command->sg, nents, dma_dir);
+
+ prefetch(&port->flags);
+
+ command->scatter_ents = nents;
+
+ /*
+ * The number of retries for this command before it is
+ * reported as a failure to the upper layers.
+ */
+ command->retries = MTIP_MAX_RETRIES;
+
+ /* Fill out fis */
+ fis = command->command;
+ fis->type = 0x27;
+ fis->opts = 1 << 7;
+ if (dma_dir == DMA_FROM_DEVICE)
+ fis->command = ATA_CMD_FPDMA_READ;
+ else
+ fis->command = ATA_CMD_FPDMA_WRITE;
+ fis->lba_low = start & 0xFF;
+ fis->lba_mid = (start >> 8) & 0xFF;
+ fis->lba_hi = (start >> 16) & 0xFF;
+ fis->lba_low_ex = (start >> 24) & 0xFF;
+ fis->lba_mid_ex = (start >> 32) & 0xFF;
+ fis->lba_hi_ex = (start >> 40) & 0xFF;
+ fis->device = 1 << 6;
+ fis->features = nsect & 0xFF;
+ fis->features_ex = (nsect >> 8) & 0xFF;
+ fis->sect_count = ((rq->tag << 3) | (rq->tag >> 5));
+ fis->sect_cnt_ex = 0;
+ fis->control = 0;
+ fis->res2 = 0;
+ fis->res3 = 0;
+ fill_command_sg(dd, command, nents);
+
+ if (unlikely(command->unaligned))
+ fis->device |= 1 << 7;
+
+ /* Populate the command header */
+ command->command_header->opts =
+ __force_bit2int cpu_to_le32(
+ (nents << 16) | 5 | AHCI_CMD_PREFETCH);
+ command->command_header->byte_count = 0;
+
+ /*
+ * Set the completion function and data for the command
+ * within this layer.
+ */
+ command->comp_data = dd;
+ command->comp_func = mtip_async_complete;
+ command->direction = dma_dir;
+
+ /*
+ * To prevent this command from being issued
+ * if an internal command is in progress or error handling is active.
+ */
+ if (unlikely(port->flags & MTIP_PF_PAUSE_IO)) {
+ set_bit(rq->tag, port->cmds_to_issue);
+ set_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags);
+ return;
+ }
+
+ /* Issue the command to the hardware */
+ mtip_issue_ncq_command(port, rq->tag);
+}
+
+/*
+ * Sysfs status dump.
+ *
+ * @dev Pointer to the device structure, passed by the kernrel.
+ * @attr Pointer to the device_attribute structure passed by the kernel.
+ * @buf Pointer to the char buffer that will receive the stats info.
+ *
+ * return value
+ * The size, in bytes, of the data copied into buf.
+ */
+static ssize_t mtip_hw_show_status(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct driver_data *dd = dev_to_disk(dev)->private_data;
+ int size = 0;
+
+ if (test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))
+ size += sprintf(buf, "%s", "thermal_shutdown\n");
+ else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag))
+ size += sprintf(buf, "%s", "write_protect\n");
+ else
+ size += sprintf(buf, "%s", "online\n");
+
+ return size;
+}
+
+static DEVICE_ATTR(status, S_IRUGO, mtip_hw_show_status, NULL);
+
+/* debugsfs entries */
+
+static ssize_t show_device_status(struct device_driver *drv, char *buf)
+{
+ int size = 0;
+ struct driver_data *dd, *tmp;
+ unsigned long flags;
+ char id_buf[42];
+ u16 status = 0;
+
+ spin_lock_irqsave(&dev_lock, flags);
+ size += sprintf(&buf[size], "Devices Present:\n");
+ list_for_each_entry_safe(dd, tmp, &online_list, online_list) {
+ if (dd->pdev) {
+ if (dd->port &&
+ dd->port->identify &&
+ dd->port->identify_valid) {
+ strlcpy(id_buf,
+ (char *) (dd->port->identify + 10), 21);
+ status = *(dd->port->identify + 141);
+ } else {
+ memset(id_buf, 0, 42);
+ status = 0;
+ }
+
+ if (dd->port &&
+ test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) {
+ size += sprintf(&buf[size],
+ " device %s %s (ftl rebuild %d %%)\n",
+ dev_name(&dd->pdev->dev),
+ id_buf,
+ status);
+ } else {
+ size += sprintf(&buf[size],
+ " device %s %s\n",
+ dev_name(&dd->pdev->dev),
+ id_buf);
+ }
+ }
+ }
+
+ size += sprintf(&buf[size], "Devices Being Removed:\n");
+ list_for_each_entry_safe(dd, tmp, &removing_list, remove_list) {
+ if (dd->pdev) {
+ if (dd->port &&
+ dd->port->identify &&
+ dd->port->identify_valid) {
+ strlcpy(id_buf,
+ (char *) (dd->port->identify+10), 21);
+ status = *(dd->port->identify + 141);
+ } else {
+ memset(id_buf, 0, 42);
+ status = 0;
+ }
+
+ if (dd->port &&
+ test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) {
+ size += sprintf(&buf[size],
+ " device %s %s (ftl rebuild %d %%)\n",
+ dev_name(&dd->pdev->dev),
+ id_buf,
+ status);
+ } else {
+ size += sprintf(&buf[size],
+ " device %s %s\n",
+ dev_name(&dd->pdev->dev),
+ id_buf);
+ }
+ }
+ }
+ spin_unlock_irqrestore(&dev_lock, flags);
+
+ return size;
+}
+
+static ssize_t mtip_hw_read_device_status(struct file *f, char __user *ubuf,
+ size_t len, loff_t *offset)
+{
+ struct driver_data *dd = (struct driver_data *)f->private_data;
+ int size = *offset;
+ char *buf;
+ int rv = 0;
+
+ if (!len || *offset)
+ return 0;
+
+ buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL);
+ if (!buf) {
+ dev_err(&dd->pdev->dev,
+ "Memory allocation: status buffer\n");
+ return -ENOMEM;
+ }
+
+ size += show_device_status(NULL, buf);
+
+ *offset = size <= len ? size : len;
+ size = copy_to_user(ubuf, buf, *offset);
+ if (size)
+ rv = -EFAULT;
+
+ kfree(buf);
+ return rv ? rv : *offset;
+}
+
+static ssize_t mtip_hw_read_registers(struct file *f, char __user *ubuf,
+ size_t len, loff_t *offset)
+{
+ struct driver_data *dd = (struct driver_data *)f->private_data;
+ char *buf;
+ u32 group_allocated;
+ int size = *offset;
+ int n, rv = 0;
+
+ if (!len || size)
+ return 0;
+
+ buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL);
+ if (!buf) {
+ dev_err(&dd->pdev->dev,
+ "Memory allocation: register buffer\n");
+ return -ENOMEM;
+ }
+
+ size += sprintf(&buf[size], "H/ S ACTive : [ 0x");
+
+ for (n = dd->slot_groups-1; n >= 0; n--)
+ size += sprintf(&buf[size], "%08X ",
+ readl(dd->port->s_active[n]));
+
+ size += sprintf(&buf[size], "]\n");
+ size += sprintf(&buf[size], "H/ Command Issue : [ 0x");
+
+ for (n = dd->slot_groups-1; n >= 0; n--)
+ size += sprintf(&buf[size], "%08X ",
+ readl(dd->port->cmd_issue[n]));
+
+ size += sprintf(&buf[size], "]\n");
+ size += sprintf(&buf[size], "H/ Completed : [ 0x");
+
+ for (n = dd->slot_groups-1; n >= 0; n--)
+ size += sprintf(&buf[size], "%08X ",
+ readl(dd->port->completed[n]));
+
+ size += sprintf(&buf[size], "]\n");
+ size += sprintf(&buf[size], "H/ PORT IRQ STAT : [ 0x%08X ]\n",
+ readl(dd->port->mmio + PORT_IRQ_STAT));
+ size += sprintf(&buf[size], "H/ HOST IRQ STAT : [ 0x%08X ]\n",
+ readl(dd->mmio + HOST_IRQ_STAT));
+ size += sprintf(&buf[size], "\n");
+
+ size += sprintf(&buf[size], "L/ Allocated : [ 0x");
+
+ for (n = dd->slot_groups-1; n >= 0; n--) {
+ if (sizeof(long) > sizeof(u32))
+ group_allocated =
+ dd->port->allocated[n/2] >> (32*(n&1));
+ else
+ group_allocated = dd->port->allocated[n];
+ size += sprintf(&buf[size], "%08X ", group_allocated);
+ }
+ size += sprintf(&buf[size], "]\n");
+
+ size += sprintf(&buf[size], "L/ Commands in Q : [ 0x");
+
+ for (n = dd->slot_groups-1; n >= 0; n--) {
+ if (sizeof(long) > sizeof(u32))
+ group_allocated =
+ dd->port->cmds_to_issue[n/2] >> (32*(n&1));
+ else
+ group_allocated = dd->port->cmds_to_issue[n];
+ size += sprintf(&buf[size], "%08X ", group_allocated);
+ }
+ size += sprintf(&buf[size], "]\n");
+
+ *offset = size <= len ? size : len;
+ size = copy_to_user(ubuf, buf, *offset);
+ if (size)
+ rv = -EFAULT;
+
+ kfree(buf);
+ return rv ? rv : *offset;
+}
+
+static ssize_t mtip_hw_read_flags(struct file *f, char __user *ubuf,
+ size_t len, loff_t *offset)
+{
+ struct driver_data *dd = (struct driver_data *)f->private_data;
+ char *buf;
+ int size = *offset;
+ int rv = 0;
+
+ if (!len || size)
+ return 0;
+
+ buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL);
+ if (!buf) {
+ dev_err(&dd->pdev->dev,
+ "Memory allocation: flag buffer\n");
+ return -ENOMEM;
+ }
+
+ size += sprintf(&buf[size], "Flag-port : [ %08lX ]\n",
+ dd->port->flags);
+ size += sprintf(&buf[size], "Flag-dd : [ %08lX ]\n",
+ dd->dd_flag);
+
+ *offset = size <= len ? size : len;
+ size = copy_to_user(ubuf, buf, *offset);
+ if (size)
+ rv = -EFAULT;
+
+ kfree(buf);
+ return rv ? rv : *offset;
+}
+
+static const struct file_operations mtip_device_status_fops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = mtip_hw_read_device_status,
+ .llseek = no_llseek,
+};
+
+static const struct file_operations mtip_regs_fops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = mtip_hw_read_registers,
+ .llseek = no_llseek,
+};
+
+static const struct file_operations mtip_flags_fops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = mtip_hw_read_flags,
+ .llseek = no_llseek,
+};
+
+/*
+ * Create the sysfs related attributes.
+ *
+ * @dd Pointer to the driver data structure.
+ * @kobj Pointer to the kobj for the block device.
+ *
+ * return value
+ * 0 Operation completed successfully.
+ * -EINVAL Invalid parameter.
+ */
+static int mtip_hw_sysfs_init(struct driver_data *dd, struct kobject *kobj)
+{
+ if (!kobj || !dd)
+ return -EINVAL;
+
+ if (sysfs_create_file(kobj, &dev_attr_status.attr))
+ dev_warn(&dd->pdev->dev,
+ "Error creating 'status' sysfs entry\n");
+ return 0;
+}
+
+/*
+ * Remove the sysfs related attributes.
+ *
+ * @dd Pointer to the driver data structure.
+ * @kobj Pointer to the kobj for the block device.
+ *
+ * return value
+ * 0 Operation completed successfully.
+ * -EINVAL Invalid parameter.
+ */
+static int mtip_hw_sysfs_exit(struct driver_data *dd, struct kobject *kobj)
+{
+ if (!kobj || !dd)
+ return -EINVAL;
+
+ sysfs_remove_file(kobj, &dev_attr_status.attr);
+
+ return 0;
+}
+
+static int mtip_hw_debugfs_init(struct driver_data *dd)
+{
+ if (!dfs_parent)
+ return -1;
+
+ dd->dfs_node = debugfs_create_dir(dd->disk->disk_name, dfs_parent);
+ if (IS_ERR_OR_NULL(dd->dfs_node)) {
+ dev_warn(&dd->pdev->dev,
+ "Error creating node %s under debugfs\n",
+ dd->disk->disk_name);
+ dd->dfs_node = NULL;
+ return -1;
+ }
+
+ debugfs_create_file("flags", S_IRUGO, dd->dfs_node, dd,
+ &mtip_flags_fops);
+ debugfs_create_file("registers", S_IRUGO, dd->dfs_node, dd,
+ &mtip_regs_fops);
+
+ return 0;
+}
+
+static void mtip_hw_debugfs_exit(struct driver_data *dd)
+{
+ if (dd->dfs_node)
+ debugfs_remove_recursive(dd->dfs_node);
+}
+
+static int mtip_free_orphan(struct driver_data *dd)
+{
+ struct kobject *kobj;
+
+ if (dd->bdev) {
+ if (dd->bdev->bd_holders >= 1)
+ return -2;
+
+ bdput(dd->bdev);
+ dd->bdev = NULL;
+ }
+
+ mtip_hw_debugfs_exit(dd);
+
+ spin_lock(&rssd_index_lock);
+ ida_remove(&rssd_index_ida, dd->index);
+ spin_unlock(&rssd_index_lock);
+
+ if (!test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag) &&
+ test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag)) {
+ put_disk(dd->disk);
+ } else {
+ if (dd->disk) {
+ kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
+ if (kobj) {
+ mtip_hw_sysfs_exit(dd, kobj);
+ kobject_put(kobj);
+ }
+ del_gendisk(dd->disk);
+ dd->disk = NULL;
+ }
+ if (dd->queue) {
+ dd->queue->queuedata = NULL;
+ blk_cleanup_queue(dd->queue);
+ blk_mq_free_tag_set(&dd->tags);
+ dd->queue = NULL;
+ }
+ }
+ kfree(dd);
+ return 0;
+}
+
+/*
+ * Perform any init/resume time hardware setup
+ *
+ * @dd Pointer to the driver data structure.
+ *
+ * return value
+ * None
+ */
+static inline void hba_setup(struct driver_data *dd)
+{
+ u32 hwdata;
+ hwdata = readl(dd->mmio + HOST_HSORG);
+
+ /* interrupt bug workaround: use only 1 IS bit.*/
+ writel(hwdata |
+ HSORG_DISABLE_SLOTGRP_INTR |
+ HSORG_DISABLE_SLOTGRP_PXIS,
+ dd->mmio + HOST_HSORG);
+}
+
+static int mtip_device_unaligned_constrained(struct driver_data *dd)
+{
+ return (dd->pdev->device == P420M_DEVICE_ID ? 1 : 0);
+}
+
+/*
+ * Detect the details of the product, and store anything needed
+ * into the driver data structure. This includes product type and
+ * version and number of slot groups.
+ *
+ * @dd Pointer to the driver data structure.
+ *
+ * return value
+ * None
+ */
+static void mtip_detect_product(struct driver_data *dd)
+{
+ u32 hwdata;
+ unsigned int rev, slotgroups;
+
+ /*
+ * HBA base + 0xFC [15:0] - vendor-specific hardware interface
+ * info register:
+ * [15:8] hardware/software interface rev#
+ * [ 3] asic-style interface
+ * [ 2:0] number of slot groups, minus 1 (only valid for asic-style).
+ */
+ hwdata = readl(dd->mmio + HOST_HSORG);
+
+ dd->product_type = MTIP_PRODUCT_UNKNOWN;
+ dd->slot_groups = 1;
+
+ if (hwdata & 0x8) {
+ dd->product_type = MTIP_PRODUCT_ASICFPGA;
+ rev = (hwdata & HSORG_HWREV) >> 8;
+ slotgroups = (hwdata & HSORG_SLOTGROUPS) + 1;
+ dev_info(&dd->pdev->dev,
+ "ASIC-FPGA design, HS rev 0x%x, "
+ "%i slot groups [%i slots]\n",
+ rev,
+ slotgroups,
+ slotgroups * 32);
+
+ if (slotgroups > MTIP_MAX_SLOT_GROUPS) {
+ dev_warn(&dd->pdev->dev,
+ "Warning: driver only supports "
+ "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS);
+ slotgroups = MTIP_MAX_SLOT_GROUPS;
+ }
+ dd->slot_groups = slotgroups;
+ return;
+ }
+
+ dev_warn(&dd->pdev->dev, "Unrecognized product id\n");
+}
+
+/*
+ * Blocking wait for FTL rebuild to complete
+ *
+ * @dd Pointer to the DRIVER_DATA structure.
+ *
+ * return value
+ * 0 FTL rebuild completed successfully
+ * -EFAULT FTL rebuild error/timeout/interruption
+ */
+static int mtip_ftl_rebuild_poll(struct driver_data *dd)
+{
+ unsigned long timeout, cnt = 0, start;
+
+ dev_warn(&dd->pdev->dev,
+ "FTL rebuild in progress. Polling for completion.\n");
+
+ start = jiffies;
+ timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS);
+
+ do {
+ if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
+ &dd->dd_flag)))
+ return -EFAULT;
+ if (mtip_check_surprise_removal(dd->pdev))
+ return -EFAULT;
+
+ if (mtip_get_identify(dd->port, NULL) < 0)
+ return -EFAULT;
+
+ if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) ==
+ MTIP_FTL_REBUILD_MAGIC) {
+ ssleep(1);
+ /* Print message every 3 minutes */
+ if (cnt++ >= 180) {
+ dev_warn(&dd->pdev->dev,
+ "FTL rebuild in progress (%d secs).\n",
+ jiffies_to_msecs(jiffies - start) / 1000);
+ cnt = 0;
+ }
+ } else {
+ dev_warn(&dd->pdev->dev,
+ "FTL rebuild complete (%d secs).\n",
+ jiffies_to_msecs(jiffies - start) / 1000);
+ mtip_block_initialize(dd);
+ return 0;
+ }
+ ssleep(10);
+ } while (time_before(jiffies, timeout));
+
+ /* Check for timeout */
+ dev_err(&dd->pdev->dev,
+ "Timed out waiting for FTL rebuild to complete (%d secs).\n",
+ jiffies_to_msecs(jiffies - start) / 1000);
+ return -EFAULT;
+}
+
+/*
+ * service thread to issue queued commands
+ *
+ * @data Pointer to the driver data structure.
+ *
+ * return value
+ * 0
+ */
+
+static int mtip_service_thread(void *data)
+{
+ struct driver_data *dd = (struct driver_data *)data;
+ unsigned long slot, slot_start, slot_wrap;
+ unsigned int num_cmd_slots = dd->slot_groups * 32;
+ struct mtip_port *port = dd->port;
+ int ret;
+
+ while (1) {
+ if (kthread_should_stop() ||
+ test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
+ goto st_out;
+ clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
+
+ /*
+ * the condition is to check neither an internal command is
+ * is in progress nor error handling is active
+ */
+ wait_event_interruptible(port->svc_wait, (port->flags) &&
+ !(port->flags & MTIP_PF_PAUSE_IO));
+
+ set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
+
+ if (kthread_should_stop() ||
+ test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
+ goto st_out;
+
+ /* If I am an orphan, start self cleanup */
+ if (test_bit(MTIP_PF_SR_CLEANUP_BIT, &port->flags))
+ break;
+
+ if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
+ &dd->dd_flag)))
+ goto st_out;
+
+restart_eh:
+ /* Demux bits: start with error handling */
+ if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags)) {
+ mtip_handle_tfe(dd);
+ clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
+ }
+
+ if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags))
+ goto restart_eh;
+
+ if (test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
+ slot = 1;
+ /* used to restrict the loop to one iteration */
+ slot_start = num_cmd_slots;
+ slot_wrap = 0;
+ while (1) {
+ slot = find_next_bit(port->cmds_to_issue,
+ num_cmd_slots, slot);
+ if (slot_wrap == 1) {
+ if ((slot_start >= slot) ||
+ (slot >= num_cmd_slots))
+ break;
+ }
+ if (unlikely(slot_start == num_cmd_slots))
+ slot_start = slot;
+
+ if (unlikely(slot == num_cmd_slots)) {
+ slot = 1;
+ slot_wrap = 1;
+ continue;
+ }
+
+ /* Issue the command to the hardware */
+ mtip_issue_ncq_command(port, slot);
+
+ clear_bit(slot, port->cmds_to_issue);
+ }
+
+ clear_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags);
+ }
+
+ if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) {
+ if (mtip_ftl_rebuild_poll(dd) < 0)
+ set_bit(MTIP_DDF_REBUILD_FAILED_BIT,
+ &dd->dd_flag);
+ clear_bit(MTIP_PF_REBUILD_BIT, &port->flags);
+ }
+ }
+
+ /* wait for pci remove to exit */
+ while (1) {
+ if (test_bit(MTIP_DDF_REMOVE_DONE_BIT, &dd->dd_flag))
+ break;
+ msleep_interruptible(1000);
+ if (kthread_should_stop())
+ goto st_out;
+ }
+
+ while (1) {
+ ret = mtip_free_orphan(dd);
+ if (!ret) {
+ /* NOTE: All data structures are invalid, do not
+ * access any here */
+ return 0;
+ }
+ msleep_interruptible(1000);
+ if (kthread_should_stop())
+ goto st_out;
+ }
+st_out:
+ return 0;
+}
+
+/*
+ * DMA region teardown
+ *
+ * @dd Pointer to driver_data structure
+ *
+ * return value
+ * None
+ */
+static void mtip_dma_free(struct driver_data *dd)
+{
+ struct mtip_port *port = dd->port;
+
+ if (port->block1)
+ dmam_free_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ,
+ port->block1, port->block1_dma);
+
+ if (port->command_list) {
+ dmam_free_coherent(&dd->pdev->dev, AHCI_CMD_TBL_SZ,
+ port->command_list, port->command_list_dma);
+ }
+}
+
+/*
+ * DMA region setup
+ *
+ * @dd Pointer to driver_data structure
+ *
+ * return value
+ * -ENOMEM Not enough free DMA region space to initialize driver
+ */
+static int mtip_dma_alloc(struct driver_data *dd)
+{
+ struct mtip_port *port = dd->port;
+
+ /* Allocate dma memory for RX Fis, Identify, and Sector Bufffer */
+ port->block1 =
+ dmam_alloc_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ,
+ &port->block1_dma, GFP_KERNEL);
+ if (!port->block1)
+ return -ENOMEM;
+ memset(port->block1, 0, BLOCK_DMA_ALLOC_SZ);
+
+ /* Allocate dma memory for command list */
+ port->command_list =
+ dmam_alloc_coherent(&dd->pdev->dev, AHCI_CMD_TBL_SZ,
+ &port->command_list_dma, GFP_KERNEL);
+ if (!port->command_list) {
+ dmam_free_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ,
+ port->block1, port->block1_dma);
+ port->block1 = NULL;
+ port->block1_dma = 0;
+ return -ENOMEM;
+ }
+ memset(port->command_list, 0, AHCI_CMD_TBL_SZ);
+
+ /* Setup all pointers into first DMA region */
+ port->rxfis = port->block1 + AHCI_RX_FIS_OFFSET;
+ port->rxfis_dma = port->block1_dma + AHCI_RX_FIS_OFFSET;
+ port->identify = port->block1 + AHCI_IDFY_OFFSET;
+ port->identify_dma = port->block1_dma + AHCI_IDFY_OFFSET;
+ port->log_buf = port->block1 + AHCI_SECTBUF_OFFSET;
+ port->log_buf_dma = port->block1_dma + AHCI_SECTBUF_OFFSET;
+ port->smart_buf = port->block1 + AHCI_SMARTBUF_OFFSET;
+ port->smart_buf_dma = port->block1_dma + AHCI_SMARTBUF_OFFSET;
+
+ return 0;
+}
+
+static int mtip_hw_get_identify(struct driver_data *dd)
+{
+ struct smart_attr attr242;
+ unsigned char *buf;
+ int rv;
+
+ if (mtip_get_identify(dd->port, NULL) < 0)
+ return -EFAULT;
+
+ if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) ==
+ MTIP_FTL_REBUILD_MAGIC) {
+ set_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags);
+ return MTIP_FTL_REBUILD_MAGIC;
+ }
+ mtip_dump_identify(dd->port);
+
+ /* check write protect, over temp and rebuild statuses */
+ rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ,
+ dd->port->log_buf,
+ dd->port->log_buf_dma, 1);
+ if (rv) {
+ dev_warn(&dd->pdev->dev,
+ "Error in READ LOG EXT (10h) command\n");
+ /* non-critical error, don't fail the load */
+ } else {
+ buf = (unsigned char *)dd->port->log_buf;
+ if (buf[259] & 0x1) {
+ dev_info(&dd->pdev->dev,
+ "Write protect bit is set.\n");
+ set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag);
+ }
+ if (buf[288] == 0xF7) {
+ dev_info(&dd->pdev->dev,
+ "Exceeded Tmax, drive in thermal shutdown.\n");
+ set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag);
+ }
+ if (buf[288] == 0xBF) {
+ dev_info(&dd->pdev->dev,
+ "Drive indicates rebuild has failed.\n");
+ /* TODO */
+ }
+ }
+
+ /* get write protect progess */
+ memset(&attr242, 0, sizeof(struct smart_attr));
+ if (mtip_get_smart_attr(dd->port, 242, &attr242))
+ dev_warn(&dd->pdev->dev,
+ "Unable to check write protect progress\n");
+ else
+ dev_info(&dd->pdev->dev,
+ "Write protect progress: %u%% (%u blocks)\n",
+ attr242.cur, le32_to_cpu(attr242.data));
+
+ return rv;
+}
+
+/*
+ * Called once for each card.
+ *
+ * @dd Pointer to the driver data structure.
+ *
+ * return value
+ * 0 on success, else an error code.
+ */
+static int mtip_hw_init(struct driver_data *dd)
+{
+ int i;
+ int rv;
+ unsigned int num_command_slots;
+ unsigned long timeout, timetaken;
+
+ dd->mmio = pcim_iomap_table(dd->pdev)[MTIP_ABAR];
+
+ mtip_detect_product(dd);
+ if (dd->product_type == MTIP_PRODUCT_UNKNOWN) {
+ rv = -EIO;
+ goto out1;
+ }
+ num_command_slots = dd->slot_groups * 32;
+
+ hba_setup(dd);
+
+ dd->port = kzalloc_node(sizeof(struct mtip_port), GFP_KERNEL,
+ dd->numa_node);
+ if (!dd->port) {
+ dev_err(&dd->pdev->dev,
+ "Memory allocation: port structure\n");
+ return -ENOMEM;
+ }
+
+ /* Continue workqueue setup */
+ for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++)
+ dd->work[i].port = dd->port;
+
+ /* Enable unaligned IO constraints for some devices */
+ if (mtip_device_unaligned_constrained(dd))
+ dd->unal_qdepth = MTIP_MAX_UNALIGNED_SLOTS;
+ else
+ dd->unal_qdepth = 0;
+
+ sema_init(&dd->port->cmd_slot_unal, dd->unal_qdepth);
+
+ /* Spinlock to prevent concurrent issue */
+ for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++)
+ spin_lock_init(&dd->port->cmd_issue_lock[i]);
+
+ /* Set the port mmio base address. */
+ dd->port->mmio = dd->mmio + PORT_OFFSET;
+ dd->port->dd = dd;
+
+ /* DMA allocations */
+ rv = mtip_dma_alloc(dd);
+ if (rv < 0)
+ goto out1;
+
+ /* Setup the pointers to the extended s_active and CI registers. */
+ for (i = 0; i < dd->slot_groups; i++) {
+ dd->port->s_active[i] =
+ dd->port->mmio + i*0x80 + PORT_SCR_ACT;
+ dd->port->cmd_issue[i] =
+ dd->port->mmio + i*0x80 + PORT_COMMAND_ISSUE;
+ dd->port->completed[i] =
+ dd->port->mmio + i*0x80 + PORT_SDBV;
+ }
+
+ timetaken = jiffies;
+ timeout = jiffies + msecs_to_jiffies(30000);
+ while (((readl(dd->port->mmio + PORT_SCR_STAT) & 0x0F) != 0x03) &&
+ time_before(jiffies, timeout)) {
+ mdelay(100);
+ }
+ if (unlikely(mtip_check_surprise_removal(dd->pdev))) {
+ timetaken = jiffies - timetaken;
+ dev_warn(&dd->pdev->dev,
+ "Surprise removal detected at %u ms\n",
+ jiffies_to_msecs(timetaken));
+ rv = -ENODEV;
+ goto out2 ;
+ }
+ if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) {
+ timetaken = jiffies - timetaken;
+ dev_warn(&dd->pdev->dev,
+ "Removal detected at %u ms\n",
+ jiffies_to_msecs(timetaken));
+ rv = -EFAULT;
+ goto out2;
+ }
+
+ /* Conditionally reset the HBA. */
+ if (!(readl(dd->mmio + HOST_CAP) & HOST_CAP_NZDMA)) {
+ if (mtip_hba_reset(dd) < 0) {
+ dev_err(&dd->pdev->dev,
+ "Card did not reset within timeout\n");
+ rv = -EIO;
+ goto out2;
+ }
+ } else {
+ /* Clear any pending interrupts on the HBA */
+ writel(readl(dd->mmio + HOST_IRQ_STAT),
+ dd->mmio + HOST_IRQ_STAT);
+ }
+
+ mtip_init_port(dd->port);
+ mtip_start_port(dd->port);
+
+ /* Setup the ISR and enable interrupts. */
+ rv = devm_request_irq(&dd->pdev->dev,
+ dd->pdev->irq,
+ mtip_irq_handler,
+ IRQF_SHARED,
+ dev_driver_string(&dd->pdev->dev),
+ dd);
+
+ if (rv) {
+ dev_err(&dd->pdev->dev,
+ "Unable to allocate IRQ %d\n", dd->pdev->irq);
+ goto out2;
+ }
+ irq_set_affinity_hint(dd->pdev->irq, get_cpu_mask(dd->isr_binding));
+
+ /* Enable interrupts on the HBA. */
+ writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
+ dd->mmio + HOST_CTL);
+
+ init_waitqueue_head(&dd->port->svc_wait);
+
+ if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) {
+ rv = -EFAULT;
+ goto out3;
+ }
+
+ return rv;
+
+out3:
+ /* Disable interrupts on the HBA. */
+ writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
+ dd->mmio + HOST_CTL);
+
+ /* Release the IRQ. */
+ irq_set_affinity_hint(dd->pdev->irq, NULL);
+ devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
+
+out2:
+ mtip_deinit_port(dd->port);
+ mtip_dma_free(dd);
+
+out1:
+ /* Free the memory allocated for the for structure. */
+ kfree(dd->port);
+
+ return rv;
+}
+
+static void mtip_standby_drive(struct driver_data *dd)
+{
+ if (dd->sr)
+ return;
+
+ /*
+ * Send standby immediate (E0h) to the drive so that it
+ * saves its state.
+ */
+ if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags) &&
+ !test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag))
+ if (mtip_standby_immediate(dd->port))
+ dev_warn(&dd->pdev->dev,
+ "STANDBY IMMEDIATE failed\n");
+}
+
+/*
+ * Called to deinitialize an interface.
+ *
+ * @dd Pointer to the driver data structure.
+ *
+ * return value
+ * 0
+ */
+static int mtip_hw_exit(struct driver_data *dd)
+{
+ /*
+ * Send standby immediate (E0h) to the drive so that it
+ * saves its state.
+ */
+ if (!dd->sr) {
+ /* de-initialize the port. */
+ mtip_deinit_port(dd->port);
+
+ /* Disable interrupts on the HBA. */
+ writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
+ dd->mmio + HOST_CTL);
+ }
+
+ /* Release the IRQ. */
+ irq_set_affinity_hint(dd->pdev->irq, NULL);
+ devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
+
+ /* Free dma regions */
+ mtip_dma_free(dd);
+
+ /* Free the memory allocated for the for structure. */
+ kfree(dd->port);
+ dd->port = NULL;
+
+ return 0;
+}
+
+/*
+ * Issue a Standby Immediate command to the device.
+ *
+ * This function is called by the Block Layer just before the
+ * system powers off during a shutdown.
+ *
+ * @dd Pointer to the driver data structure.
+ *
+ * return value
+ * 0
+ */
+static int mtip_hw_shutdown(struct driver_data *dd)
+{
+ /*
+ * Send standby immediate (E0h) to the drive so that it
+ * saves its state.
+ */
+ if (!dd->sr && dd->port)
+ mtip_standby_immediate(dd->port);
+
+ return 0;
+}
+
+/*
+ * Suspend function
+ *
+ * This function is called by the Block Layer just before the
+ * system hibernates.
+ *
+ * @dd Pointer to the driver data structure.
+ *
+ * return value
+ * 0 Suspend was successful
+ * -EFAULT Suspend was not successful
+ */
+static int mtip_hw_suspend(struct driver_data *dd)
+{
+ /*
+ * Send standby immediate (E0h) to the drive
+ * so that it saves its state.
+ */
+ if (mtip_standby_immediate(dd->port) != 0) {
+ dev_err(&dd->pdev->dev,
+ "Failed standby-immediate command\n");
+ return -EFAULT;
+ }
+
+ /* Disable interrupts on the HBA.*/
+ writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
+ dd->mmio + HOST_CTL);
+ mtip_deinit_port(dd->port);
+
+ return 0;
+}
+
+/*
+ * Resume function
+ *
+ * This function is called by the Block Layer as the
+ * system resumes.
+ *
+ * @dd Pointer to the driver data structure.
+ *
+ * return value
+ * 0 Resume was successful
+ * -EFAULT Resume was not successful
+ */
+static int mtip_hw_resume(struct driver_data *dd)
+{
+ /* Perform any needed hardware setup steps */
+ hba_setup(dd);
+
+ /* Reset the HBA */
+ if (mtip_hba_reset(dd) != 0) {
+ dev_err(&dd->pdev->dev,
+ "Unable to reset the HBA\n");
+ return -EFAULT;
+ }
+
+ /*
+ * Enable the port, DMA engine, and FIS reception specific
+ * h/w in controller.
+ */
+ mtip_init_port(dd->port);
+ mtip_start_port(dd->port);
+
+ /* Enable interrupts on the HBA.*/
+ writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
+ dd->mmio + HOST_CTL);
+
+ return 0;
+}
+
+/*
+ * Helper function for reusing disk name
+ * upon hot insertion.
+ */
+static int rssd_disk_name_format(char *prefix,
+ int index,
+ char *buf,
+ int buflen)
+{
+ const int base = 'z' - 'a' + 1;
+ char *begin = buf + strlen(prefix);
+ char *end = buf + buflen;
+ char *p;
+ int unit;
+
+ p = end - 1;
+ *p = '\0';
+ unit = base;
+ do {
+ if (p == begin)
+ return -EINVAL;
+ *--p = 'a' + (index % unit);
+ index = (index / unit) - 1;
+ } while (index >= 0);
+
+ memmove(begin, p, end - p);
+ memcpy(buf, prefix, strlen(prefix));
+
+ return 0;
+}
+
+/*
+ * Block layer IOCTL handler.
+ *
+ * @dev Pointer to the block_device structure.
+ * @mode ignored
+ * @cmd IOCTL command passed from the user application.
+ * @arg Argument passed from the user application.
+ *
+ * return value
+ * 0 IOCTL completed successfully.
+ * -ENOTTY IOCTL not supported or invalid driver data
+ * structure pointer.
+ */
+static int mtip_block_ioctl(struct block_device *dev,
+ fmode_t mode,
+ unsigned cmd,
+ unsigned long arg)
+{
+ struct driver_data *dd = dev->bd_disk->private_data;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ if (!dd)
+ return -ENOTTY;
+
+ if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)))
+ return -ENOTTY;
+
+ switch (cmd) {
+ case BLKFLSBUF:
+ return -ENOTTY;
+ default:
+ return mtip_hw_ioctl(dd, cmd, arg);
+ }
+}
+
+#ifdef CONFIG_COMPAT
+/*
+ * Block layer compat IOCTL handler.
+ *
+ * @dev Pointer to the block_device structure.
+ * @mode ignored
+ * @cmd IOCTL command passed from the user application.
+ * @arg Argument passed from the user application.
+ *
+ * return value
+ * 0 IOCTL completed successfully.
+ * -ENOTTY IOCTL not supported or invalid driver data
+ * structure pointer.
+ */
+static int mtip_block_compat_ioctl(struct block_device *dev,
+ fmode_t mode,
+ unsigned cmd,
+ unsigned long arg)
+{
+ struct driver_data *dd = dev->bd_disk->private_data;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ if (!dd)
+ return -ENOTTY;
+
+ if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)))
+ return -ENOTTY;
+
+ switch (cmd) {
+ case BLKFLSBUF:
+ return -ENOTTY;
+ case HDIO_DRIVE_TASKFILE: {
+ struct mtip_compat_ide_task_request_s __user *compat_req_task;
+ ide_task_request_t req_task;
+ int compat_tasksize, outtotal, ret;
+
+ compat_tasksize =
+ sizeof(struct mtip_compat_ide_task_request_s);
+
+ compat_req_task =
+ (struct mtip_compat_ide_task_request_s __user *) arg;
+
+ if (copy_from_user(&req_task, (void __user *) arg,
+ compat_tasksize - (2 * sizeof(compat_long_t))))
+ return -EFAULT;
+
+ if (get_user(req_task.out_size, &compat_req_task->out_size))
+ return -EFAULT;
+
+ if (get_user(req_task.in_size, &compat_req_task->in_size))
+ return -EFAULT;
+
+ outtotal = sizeof(struct mtip_compat_ide_task_request_s);
+
+ ret = exec_drive_taskfile(dd, (void __user *) arg,
+ &req_task, outtotal);
+
+ if (copy_to_user((void __user *) arg, &req_task,
+ compat_tasksize -
+ (2 * sizeof(compat_long_t))))
+ return -EFAULT;
+
+ if (put_user(req_task.out_size, &compat_req_task->out_size))
+ return -EFAULT;
+
+ if (put_user(req_task.in_size, &compat_req_task->in_size))
+ return -EFAULT;
+
+ return ret;
+ }
+ default:
+ return mtip_hw_ioctl(dd, cmd, arg);
+ }
+}
+#endif
+
+/*
+ * Obtain the geometry of the device.
+ *
+ * You may think that this function is obsolete, but some applications,
+ * fdisk for example still used CHS values. This function describes the
+ * device as having 224 heads and 56 sectors per cylinder. These values are
+ * chosen so that each cylinder is aligned on a 4KB boundary. Since a
+ * partition is described in terms of a start and end cylinder this means
+ * that each partition is also 4KB aligned. Non-aligned partitions adversely
+ * affects performance.
+ *
+ * @dev Pointer to the block_device strucutre.
+ * @geo Pointer to a hd_geometry structure.
+ *
+ * return value
+ * 0 Operation completed successfully.
+ * -ENOTTY An error occurred while reading the drive capacity.
+ */
+static int mtip_block_getgeo(struct block_device *dev,
+ struct hd_geometry *geo)
+{
+ struct driver_data *dd = dev->bd_disk->private_data;
+ sector_t capacity;
+
+ if (!dd)
+ return -ENOTTY;
+
+ if (!(mtip_hw_get_capacity(dd, &capacity))) {
+ dev_warn(&dd->pdev->dev,
+ "Could not get drive capacity.\n");
+ return -ENOTTY;
+ }
+
+ geo->heads = 224;
+ geo->sectors = 56;
+ sector_div(capacity, (geo->heads * geo->sectors));
+ geo->cylinders = capacity;
+ return 0;
+}
+
+/*
+ * Block device operation function.
+ *
+ * This structure contains pointers to the functions required by the block
+ * layer.
+ */
+static const struct block_device_operations mtip_block_ops = {
+ .ioctl = mtip_block_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = mtip_block_compat_ioctl,
+#endif
+ .getgeo = mtip_block_getgeo,
+ .owner = THIS_MODULE
+};
+
+/*
+ * Block layer make request function.
+ *
+ * This function is called by the kernel to process a BIO for
+ * the P320 device.
+ *
+ * @queue Pointer to the request queue. Unused other than to obtain
+ * the driver data structure.
+ * @rq Pointer to the request.
+ *
+ */
+static int mtip_submit_request(struct blk_mq_hw_ctx *hctx, struct request *rq)
+{
+ struct driver_data *dd = hctx->queue->queuedata;
+ struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
+ unsigned int nents;
+
+ if (unlikely(dd->dd_flag & MTIP_DDF_STOP_IO)) {
+ if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
+ &dd->dd_flag))) {
+ return -ENXIO;
+ }
+ if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))) {
+ return -ENODATA;
+ }
+ if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT,
+ &dd->dd_flag) &&
+ rq_data_dir(rq))) {
+ return -ENODATA;
+ }
+ if (unlikely(test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)))
+ return -ENODATA;
+ if (test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag))
+ return -ENXIO;
+ }
+
+ if (rq->cmd_flags & REQ_DISCARD) {
+ int err;
+
+ err = mtip_send_trim(dd, blk_rq_pos(rq), blk_rq_sectors(rq));
+ blk_mq_end_request(rq, err);
+ return 0;
+ }
+
+ /* Create the scatter list for this request. */
+ nents = blk_rq_map_sg(hctx->queue, rq, cmd->sg);
+
+ /* Issue the read/write. */
+ mtip_hw_submit_io(dd, rq, cmd, nents, hctx);
+ return 0;
+}
+
+static bool mtip_check_unal_depth(struct blk_mq_hw_ctx *hctx,
+ struct request *rq)
+{
+ struct driver_data *dd = hctx->queue->queuedata;
+ struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
+
+ if (rq_data_dir(rq) == READ || !dd->unal_qdepth)
+ return false;
+
+ /*
+ * If unaligned depth must be limited on this controller, mark it
+ * as unaligned if the IO isn't on a 4k boundary (start of length).
+ */
+ if (blk_rq_sectors(rq) <= 64) {
+ if ((blk_rq_pos(rq) & 7) || (blk_rq_sectors(rq) & 7))
+ cmd->unaligned = 1;
+ }
+
+ if (cmd->unaligned && down_trylock(&dd->port->cmd_slot_unal))
+ return true;
+
+ return false;
+}
+
+static int mtip_queue_rq(struct blk_mq_hw_ctx *hctx,
+ const struct blk_mq_queue_data *bd)
+{
+ struct request *rq = bd->rq;
+ int ret;
+
+ if (unlikely(mtip_check_unal_depth(hctx, rq)))
+ return BLK_MQ_RQ_QUEUE_BUSY;
+
+ blk_mq_start_request(rq);
+
+ ret = mtip_submit_request(hctx, rq);
+ if (likely(!ret))
+ return BLK_MQ_RQ_QUEUE_OK;
+
+ rq->errors = ret;
+ return BLK_MQ_RQ_QUEUE_ERROR;
+}
+
+static void mtip_free_cmd(void *data, struct request *rq,
+ unsigned int hctx_idx, unsigned int request_idx)
+{
+ struct driver_data *dd = data;
+ struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
+
+ if (!cmd->command)
+ return;
+
+ dmam_free_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ,
+ cmd->command, cmd->command_dma);
+}
+
+static int mtip_init_cmd(void *data, struct request *rq, unsigned int hctx_idx,
+ unsigned int request_idx, unsigned int numa_node)
+{
+ struct driver_data *dd = data;
+ struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
+ u32 host_cap_64 = readl(dd->mmio + HOST_CAP) & HOST_CAP_64;
+
+ cmd->command = dmam_alloc_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ,
+ &cmd->command_dma, GFP_KERNEL);
+ if (!cmd->command)
+ return -ENOMEM;
+
+ memset(cmd->command, 0, CMD_DMA_ALLOC_SZ);
+
+ /* Point the command headers at the command tables. */
+ cmd->command_header = dd->port->command_list +
+ (sizeof(struct mtip_cmd_hdr) * request_idx);
+ cmd->command_header_dma = dd->port->command_list_dma +
+ (sizeof(struct mtip_cmd_hdr) * request_idx);
+
+ if (host_cap_64)
+ cmd->command_header->ctbau = __force_bit2int cpu_to_le32((cmd->command_dma >> 16) >> 16);
+
+ cmd->command_header->ctba = __force_bit2int cpu_to_le32(cmd->command_dma & 0xFFFFFFFF);
+
+ sg_init_table(cmd->sg, MTIP_MAX_SG);
+ return 0;
+}
+
+static struct blk_mq_ops mtip_mq_ops = {
+ .queue_rq = mtip_queue_rq,
+ .map_queue = blk_mq_map_queue,
+ .init_request = mtip_init_cmd,
+ .exit_request = mtip_free_cmd,
+};
+
+/*
+ * Block layer initialization function.
+ *
+ * This function is called once by the PCI layer for each P320
+ * device that is connected to the system.
+ *
+ * @dd Pointer to the driver data structure.
+ *
+ * return value
+ * 0 on success else an error code.
+ */
+static int mtip_block_initialize(struct driver_data *dd)
+{
+ int rv = 0, wait_for_rebuild = 0;
+ sector_t capacity;
+ unsigned int index = 0;
+ struct kobject *kobj;
+ unsigned char thd_name[16];
+
+ if (dd->disk)
+ goto skip_create_disk; /* hw init done, before rebuild */
+
+ if (mtip_hw_init(dd)) {
+ rv = -EINVAL;
+ goto protocol_init_error;
+ }
+
+ dd->disk = alloc_disk_node(MTIP_MAX_MINORS, dd->numa_node);
+ if (dd->disk == NULL) {
+ dev_err(&dd->pdev->dev,
+ "Unable to allocate gendisk structure\n");
+ rv = -EINVAL;
+ goto alloc_disk_error;
+ }
+
+ /* Generate the disk name, implemented same as in sd.c */
+ do {
+ if (!ida_pre_get(&rssd_index_ida, GFP_KERNEL))
+ goto ida_get_error;
+
+ spin_lock(&rssd_index_lock);
+ rv = ida_get_new(&rssd_index_ida, &index);
+ spin_unlock(&rssd_index_lock);
+ } while (rv == -EAGAIN);
+
+ if (rv)
+ goto ida_get_error;
+
+ rv = rssd_disk_name_format("rssd",
+ index,
+ dd->disk->disk_name,
+ DISK_NAME_LEN);
+ if (rv)
+ goto disk_index_error;
+
+ dd->disk->driverfs_dev = &dd->pdev->dev;
+ dd->disk->major = dd->major;
+ dd->disk->first_minor = dd->instance * MTIP_MAX_MINORS;
+ dd->disk->fops = &mtip_block_ops;
+ dd->disk->private_data = dd;
+ dd->index = index;
+
+ mtip_hw_debugfs_init(dd);
+
+skip_create_disk:
+ memset(&dd->tags, 0, sizeof(dd->tags));
+ dd->tags.ops = &mtip_mq_ops;
+ dd->tags.nr_hw_queues = 1;
+ dd->tags.queue_depth = MTIP_MAX_COMMAND_SLOTS;
+ dd->tags.reserved_tags = 1;
+ dd->tags.cmd_size = sizeof(struct mtip_cmd);
+ dd->tags.numa_node = dd->numa_node;
+ dd->tags.flags = BLK_MQ_F_SHOULD_MERGE;
+ dd->tags.driver_data = dd;
+
+ rv = blk_mq_alloc_tag_set(&dd->tags);
+ if (rv) {
+ dev_err(&dd->pdev->dev,
+ "Unable to allocate request queue\n");
+ goto block_queue_alloc_init_error;
+ }
+
+ /* Allocate the request queue. */
+ dd->queue = blk_mq_init_queue(&dd->tags);
+ if (IS_ERR(dd->queue)) {
+ dev_err(&dd->pdev->dev,
+ "Unable to allocate request queue\n");
+ rv = -ENOMEM;
+ goto block_queue_alloc_init_error;
+ }
+
+ dd->disk->queue = dd->queue;
+ dd->queue->queuedata = dd;
+
+ /* Initialize the protocol layer. */
+ wait_for_rebuild = mtip_hw_get_identify(dd);
+ if (wait_for_rebuild < 0) {
+ dev_err(&dd->pdev->dev,
+ "Protocol layer initialization failed\n");
+ rv = -EINVAL;
+ goto init_hw_cmds_error;
+ }
+
+ /*
+ * if rebuild pending, start the service thread, and delay the block
+ * queue creation and add_disk()
+ */
+ if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC)
+ goto start_service_thread;
+
+ /* Set device limits. */
+ set_bit(QUEUE_FLAG_NONROT, &dd->queue->queue_flags);
+ clear_bit(QUEUE_FLAG_ADD_RANDOM, &dd->queue->queue_flags);
+ blk_queue_max_segments(dd->queue, MTIP_MAX_SG);
+ blk_queue_physical_block_size(dd->queue, 4096);
+ blk_queue_max_hw_sectors(dd->queue, 0xffff);
+ blk_queue_max_segment_size(dd->queue, 0x400000);
+ blk_queue_io_min(dd->queue, 4096);
+ blk_queue_bounce_limit(dd->queue, dd->pdev->dma_mask);
+
+ /*
+ * write back cache is not supported in the device. FUA depends on
+ * write back cache support, hence setting flush support to zero.
+ */
+ blk_queue_flush(dd->queue, 0);
+
+ /* Signal trim support */
+ if (dd->trim_supp == true) {
+ set_bit(QUEUE_FLAG_DISCARD, &dd->queue->queue_flags);
+ dd->queue->limits.discard_granularity = 4096;
+ blk_queue_max_discard_sectors(dd->queue,
+ MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES);
+ dd->queue->limits.discard_zeroes_data = 0;
+ }
+
+ /* Set the capacity of the device in 512 byte sectors. */
+ if (!(mtip_hw_get_capacity(dd, &capacity))) {
+ dev_warn(&dd->pdev->dev,
+ "Could not read drive capacity\n");
+ rv = -EIO;
+ goto read_capacity_error;
+ }
+ set_capacity(dd->disk, capacity);
+
+ /* Enable the block device and add it to /dev */
+ add_disk(dd->disk);
+
+ dd->bdev = bdget_disk(dd->disk, 0);
+ /*
+ * Now that the disk is active, initialize any sysfs attributes
+ * managed by the protocol layer.
+ */
+ kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
+ if (kobj) {
+ mtip_hw_sysfs_init(dd, kobj);
+ kobject_put(kobj);
+ }
+
+ if (dd->mtip_svc_handler) {
+ set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag);
+ return rv; /* service thread created for handling rebuild */
+ }
+
+start_service_thread:
+ sprintf(thd_name, "mtip_svc_thd_%02d", index);
+ dd->mtip_svc_handler = kthread_create_on_node(mtip_service_thread,
+ dd, dd->numa_node, "%s",
+ thd_name);
+
+ if (IS_ERR(dd->mtip_svc_handler)) {
+ dev_err(&dd->pdev->dev, "service thread failed to start\n");
+ dd->mtip_svc_handler = NULL;
+ rv = -EFAULT;
+ goto kthread_run_error;
+ }
+ wake_up_process(dd->mtip_svc_handler);
+ if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC)
+ rv = wait_for_rebuild;
+
+ return rv;
+
+kthread_run_error:
+ bdput(dd->bdev);
+ dd->bdev = NULL;
+
+ /* Delete our gendisk. This also removes the device from /dev */
+ del_gendisk(dd->disk);
+
+read_capacity_error:
+init_hw_cmds_error:
+ blk_cleanup_queue(dd->queue);
+ blk_mq_free_tag_set(&dd->tags);
+block_queue_alloc_init_error:
+ mtip_hw_debugfs_exit(dd);
+disk_index_error:
+ spin_lock(&rssd_index_lock);
+ ida_remove(&rssd_index_ida, index);
+ spin_unlock(&rssd_index_lock);
+
+ida_get_error:
+ put_disk(dd->disk);
+
+alloc_disk_error:
+ mtip_hw_exit(dd); /* De-initialize the protocol layer. */
+
+protocol_init_error:
+ return rv;
+}
+
+/*
+ * Block layer deinitialization function.
+ *
+ * Called by the PCI layer as each P320 device is removed.
+ *
+ * @dd Pointer to the driver data structure.
+ *
+ * return value
+ * 0
+ */
+static int mtip_block_remove(struct driver_data *dd)
+{
+ struct kobject *kobj;
+
+ if (!dd->sr) {
+ mtip_hw_debugfs_exit(dd);
+
+ if (dd->mtip_svc_handler) {
+ set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags);
+ wake_up_interruptible(&dd->port->svc_wait);
+ kthread_stop(dd->mtip_svc_handler);
+ }
+
+ /* Clean up the sysfs attributes, if created */
+ if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) {
+ kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
+ if (kobj) {
+ mtip_hw_sysfs_exit(dd, kobj);
+ kobject_put(kobj);
+ }
+ }
+
+ mtip_standby_drive(dd);
+
+ /*
+ * Delete our gendisk structure. This also removes the device
+ * from /dev
+ */
+ if (dd->bdev) {
+ bdput(dd->bdev);
+ dd->bdev = NULL;
+ }
+ if (dd->disk) {
+ if (dd->disk->queue) {
+ del_gendisk(dd->disk);
+ blk_cleanup_queue(dd->queue);
+ blk_mq_free_tag_set(&dd->tags);
+ dd->queue = NULL;
+ } else
+ put_disk(dd->disk);
+ }
+ dd->disk = NULL;
+
+ spin_lock(&rssd_index_lock);
+ ida_remove(&rssd_index_ida, dd->index);
+ spin_unlock(&rssd_index_lock);
+ } else {
+ dev_info(&dd->pdev->dev, "device %s surprise removal\n",
+ dd->disk->disk_name);
+ }
+
+ /* De-initialize the protocol layer. */
+ mtip_hw_exit(dd);
+
+ return 0;
+}
+
+/*
+ * Function called by the PCI layer when just before the
+ * machine shuts down.
+ *
+ * If a protocol layer shutdown function is present it will be called
+ * by this function.
+ *
+ * @dd Pointer to the driver data structure.
+ *
+ * return value
+ * 0
+ */
+static int mtip_block_shutdown(struct driver_data *dd)
+{
+ mtip_hw_shutdown(dd);
+
+ /* Delete our gendisk structure, and cleanup the blk queue. */
+ if (dd->disk) {
+ dev_info(&dd->pdev->dev,
+ "Shutting down %s ...\n", dd->disk->disk_name);
+
+ if (dd->disk->queue) {
+ del_gendisk(dd->disk);
+ blk_cleanup_queue(dd->queue);
+ blk_mq_free_tag_set(&dd->tags);
+ } else
+ put_disk(dd->disk);
+ dd->disk = NULL;
+ dd->queue = NULL;
+ }
+
+ spin_lock(&rssd_index_lock);
+ ida_remove(&rssd_index_ida, dd->index);
+ spin_unlock(&rssd_index_lock);
+ return 0;
+}
+
+static int mtip_block_suspend(struct driver_data *dd)
+{
+ dev_info(&dd->pdev->dev,
+ "Suspending %s ...\n", dd->disk->disk_name);
+ mtip_hw_suspend(dd);
+ return 0;
+}
+
+static int mtip_block_resume(struct driver_data *dd)
+{
+ dev_info(&dd->pdev->dev, "Resuming %s ...\n",
+ dd->disk->disk_name);
+ mtip_hw_resume(dd);
+ return 0;
+}
+
+static void drop_cpu(int cpu)
+{
+ cpu_use[cpu]--;
+}
+
+static int get_least_used_cpu_on_node(int node)
+{
+ int cpu, least_used_cpu, least_cnt;
+ const struct cpumask *node_mask;
+
+ node_mask = cpumask_of_node(node);
+ least_used_cpu = cpumask_first(node_mask);
+ least_cnt = cpu_use[least_used_cpu];
+ cpu = least_used_cpu;
+
+ for_each_cpu(cpu, node_mask) {
+ if (cpu_use[cpu] < least_cnt) {
+ least_used_cpu = cpu;
+ least_cnt = cpu_use[cpu];
+ }
+ }
+ cpu_use[least_used_cpu]++;
+ return least_used_cpu;
+}
+
+/* Helper for selecting a node in round robin mode */
+static inline int mtip_get_next_rr_node(void)
+{
+ static int next_node = -1;
+
+ if (next_node == -1) {
+ next_node = first_online_node;
+ return next_node;
+ }
+
+ next_node = next_online_node(next_node);
+ if (next_node == MAX_NUMNODES)
+ next_node = first_online_node;
+ return next_node;
+}
+
+static DEFINE_HANDLER(0);
+static DEFINE_HANDLER(1);
+static DEFINE_HANDLER(2);
+static DEFINE_HANDLER(3);
+static DEFINE_HANDLER(4);
+static DEFINE_HANDLER(5);
+static DEFINE_HANDLER(6);
+static DEFINE_HANDLER(7);
+
+static void mtip_disable_link_opts(struct driver_data *dd, struct pci_dev *pdev)
+{
+ int pos;
+ unsigned short pcie_dev_ctrl;
+
+ pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
+ if (pos) {
+ pci_read_config_word(pdev,
+ pos + PCI_EXP_DEVCTL,
+ &pcie_dev_ctrl);
+ if (pcie_dev_ctrl & (1 << 11) ||
+ pcie_dev_ctrl & (1 << 4)) {
+ dev_info(&dd->pdev->dev,
+ "Disabling ERO/No-Snoop on bridge device %04x:%04x\n",
+ pdev->vendor, pdev->device);
+ pcie_dev_ctrl &= ~(PCI_EXP_DEVCTL_NOSNOOP_EN |
+ PCI_EXP_DEVCTL_RELAX_EN);
+ pci_write_config_word(pdev,
+ pos + PCI_EXP_DEVCTL,
+ pcie_dev_ctrl);
+ }
+ }
+}
+
+static void mtip_fix_ero_nosnoop(struct driver_data *dd, struct pci_dev *pdev)
+{
+ /*
+ * This workaround is specific to AMD/ATI chipset with a PCI upstream
+ * device with device id 0x5aXX
+ */
+ if (pdev->bus && pdev->bus->self) {
+ if (pdev->bus->self->vendor == PCI_VENDOR_ID_ATI &&
+ ((pdev->bus->self->device & 0xff00) == 0x5a00)) {
+ mtip_disable_link_opts(dd, pdev->bus->self);
+ } else {
+ /* Check further up the topology */
+ struct pci_dev *parent_dev = pdev->bus->self;
+ if (parent_dev->bus &&
+ parent_dev->bus->parent &&
+ parent_dev->bus->parent->self &&
+ parent_dev->bus->parent->self->vendor ==
+ PCI_VENDOR_ID_ATI &&
+ (parent_dev->bus->parent->self->device &
+ 0xff00) == 0x5a00) {
+ mtip_disable_link_opts(dd,
+ parent_dev->bus->parent->self);
+ }
+ }
+ }
+}
+
+/*
+ * Called for each supported PCI device detected.
+ *
+ * This function allocates the private data structure, enables the
+ * PCI device and then calls the block layer initialization function.
+ *
+ * return value
+ * 0 on success else an error code.
+ */
+static int mtip_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ int rv = 0;
+ struct driver_data *dd = NULL;
+ char cpu_list[256];
+ const struct cpumask *node_mask;
+ int cpu, i = 0, j = 0;
+ int my_node = NUMA_NO_NODE;
+ unsigned long flags;
+
+ /* Allocate memory for this devices private data. */
+ my_node = pcibus_to_node(pdev->bus);
+ if (my_node != NUMA_NO_NODE) {
+ if (!node_online(my_node))
+ my_node = mtip_get_next_rr_node();
+ } else {
+ dev_info(&pdev->dev, "Kernel not reporting proximity, choosing a node\n");
+ my_node = mtip_get_next_rr_node();
+ }
+ dev_info(&pdev->dev, "NUMA node %d (closest: %d,%d, probe on %d:%d)\n",
+ my_node, pcibus_to_node(pdev->bus), dev_to_node(&pdev->dev),
+ cpu_to_node(raw_smp_processor_id()), raw_smp_processor_id());
+
+ dd = kzalloc_node(sizeof(struct driver_data), GFP_KERNEL, my_node);
+ if (dd == NULL) {
+ dev_err(&pdev->dev,
+ "Unable to allocate memory for driver data\n");
+ return -ENOMEM;
+ }
+
+ /* Attach the private data to this PCI device. */
+ pci_set_drvdata(pdev, dd);
+
+ rv = pcim_enable_device(pdev);
+ if (rv < 0) {
+ dev_err(&pdev->dev, "Unable to enable device\n");
+ goto iomap_err;
+ }
+
+ /* Map BAR5 to memory. */
+ rv = pcim_iomap_regions(pdev, 1 << MTIP_ABAR, MTIP_DRV_NAME);
+ if (rv < 0) {
+ dev_err(&pdev->dev, "Unable to map regions\n");
+ goto iomap_err;
+ }
+
+ if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
+ rv = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
+
+ if (rv) {
+ rv = pci_set_consistent_dma_mask(pdev,
+ DMA_BIT_MASK(32));
+ if (rv) {
+ dev_warn(&pdev->dev,
+ "64-bit DMA enable failed\n");
+ goto setmask_err;
+ }
+ }
+ }
+
+ /* Copy the info we may need later into the private data structure. */
+ dd->major = mtip_major;
+ dd->instance = instance;
+ dd->pdev = pdev;
+ dd->numa_node = my_node;
+
+ INIT_LIST_HEAD(&dd->online_list);
+ INIT_LIST_HEAD(&dd->remove_list);
+
+ memset(dd->workq_name, 0, 32);
+ snprintf(dd->workq_name, 31, "mtipq%d", dd->instance);
+
+ dd->isr_workq = create_workqueue(dd->workq_name);
+ if (!dd->isr_workq) {
+ dev_warn(&pdev->dev, "Can't create wq %d\n", dd->instance);
+ rv = -ENOMEM;
+ goto block_initialize_err;
+ }
+
+ memset(cpu_list, 0, sizeof(cpu_list));
+
+ node_mask = cpumask_of_node(dd->numa_node);
+ if (!cpumask_empty(node_mask)) {
+ for_each_cpu(cpu, node_mask)
+ {
+ snprintf(&cpu_list[j], 256 - j, "%d ", cpu);
+ j = strlen(cpu_list);
+ }
+
+ dev_info(&pdev->dev, "Node %d on package %d has %d cpu(s): %s\n",
+ dd->numa_node,
+ topology_physical_package_id(cpumask_first(node_mask)),
+ nr_cpus_node(dd->numa_node),
+ cpu_list);
+ } else
+ dev_dbg(&pdev->dev, "mtip32xx: node_mask empty\n");
+
+ dd->isr_binding = get_least_used_cpu_on_node(dd->numa_node);
+ dev_info(&pdev->dev, "Initial IRQ binding node:cpu %d:%d\n",
+ cpu_to_node(dd->isr_binding), dd->isr_binding);
+
+ /* first worker context always runs in ISR */
+ dd->work[0].cpu_binding = dd->isr_binding;
+ dd->work[1].cpu_binding = get_least_used_cpu_on_node(dd->numa_node);
+ dd->work[2].cpu_binding = get_least_used_cpu_on_node(dd->numa_node);
+ dd->work[3].cpu_binding = dd->work[0].cpu_binding;
+ dd->work[4].cpu_binding = dd->work[1].cpu_binding;
+ dd->work[5].cpu_binding = dd->work[2].cpu_binding;
+ dd->work[6].cpu_binding = dd->work[2].cpu_binding;
+ dd->work[7].cpu_binding = dd->work[1].cpu_binding;
+
+ /* Log the bindings */
+ for_each_present_cpu(cpu) {
+ memset(cpu_list, 0, sizeof(cpu_list));
+ for (i = 0, j = 0; i < MTIP_MAX_SLOT_GROUPS; i++) {
+ if (dd->work[i].cpu_binding == cpu) {
+ snprintf(&cpu_list[j], 256 - j, "%d ", i);
+ j = strlen(cpu_list);
+ }
+ }
+ if (j)
+ dev_info(&pdev->dev, "CPU %d: WQs %s\n", cpu, cpu_list);
+ }
+
+ INIT_WORK(&dd->work[0].work, mtip_workq_sdbf0);
+ INIT_WORK(&dd->work[1].work, mtip_workq_sdbf1);
+ INIT_WORK(&dd->work[2].work, mtip_workq_sdbf2);
+ INIT_WORK(&dd->work[3].work, mtip_workq_sdbf3);
+ INIT_WORK(&dd->work[4].work, mtip_workq_sdbf4);
+ INIT_WORK(&dd->work[5].work, mtip_workq_sdbf5);
+ INIT_WORK(&dd->work[6].work, mtip_workq_sdbf6);
+ INIT_WORK(&dd->work[7].work, mtip_workq_sdbf7);
+
+ pci_set_master(pdev);
+ rv = pci_enable_msi(pdev);
+ if (rv) {
+ dev_warn(&pdev->dev,
+ "Unable to enable MSI interrupt.\n");
+ goto msi_initialize_err;
+ }
+
+ mtip_fix_ero_nosnoop(dd, pdev);
+
+ /* Initialize the block layer. */
+ rv = mtip_block_initialize(dd);
+ if (rv < 0) {
+ dev_err(&pdev->dev,
+ "Unable to initialize block layer\n");
+ goto block_initialize_err;
+ }
+
+ /*
+ * Increment the instance count so that each device has a unique
+ * instance number.
+ */
+ instance++;
+ if (rv != MTIP_FTL_REBUILD_MAGIC)
+ set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag);
+ else
+ rv = 0; /* device in rebuild state, return 0 from probe */
+
+ /* Add to online list even if in ftl rebuild */
+ spin_lock_irqsave(&dev_lock, flags);
+ list_add(&dd->online_list, &online_list);
+ spin_unlock_irqrestore(&dev_lock, flags);
+
+ goto done;
+
+block_initialize_err:
+ pci_disable_msi(pdev);
+
+msi_initialize_err:
+ if (dd->isr_workq) {
+ flush_workqueue(dd->isr_workq);
+ destroy_workqueue(dd->isr_workq);
+ drop_cpu(dd->work[0].cpu_binding);
+ drop_cpu(dd->work[1].cpu_binding);
+ drop_cpu(dd->work[2].cpu_binding);
+ }
+setmask_err:
+ pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
+
+iomap_err:
+ kfree(dd);
+ pci_set_drvdata(pdev, NULL);
+ return rv;
+done:
+ return rv;
+}
+
+/*
+ * Called for each probed device when the device is removed or the
+ * driver is unloaded.
+ *
+ * return value
+ * None
+ */
+static void mtip_pci_remove(struct pci_dev *pdev)
+{
+ struct driver_data *dd = pci_get_drvdata(pdev);
+ unsigned long flags, to;
+
+ set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag);
+
+ spin_lock_irqsave(&dev_lock, flags);
+ list_del_init(&dd->online_list);
+ list_add(&dd->remove_list, &removing_list);
+ spin_unlock_irqrestore(&dev_lock, flags);
+
+ mtip_check_surprise_removal(pdev);
+ synchronize_irq(dd->pdev->irq);
+
+ /* Spin until workers are done */
+ to = jiffies + msecs_to_jiffies(4000);
+ do {
+ msleep(20);
+ } while (atomic_read(&dd->irq_workers_active) != 0 &&
+ time_before(jiffies, to));
+
+ if (atomic_read(&dd->irq_workers_active) != 0) {
+ dev_warn(&dd->pdev->dev,
+ "Completion workers still active!\n");
+ }
+
+ /* Clean up the block layer. */
+ mtip_block_remove(dd);
+
+ if (dd->isr_workq) {
+ flush_workqueue(dd->isr_workq);
+ destroy_workqueue(dd->isr_workq);
+ drop_cpu(dd->work[0].cpu_binding);
+ drop_cpu(dd->work[1].cpu_binding);
+ drop_cpu(dd->work[2].cpu_binding);
+ }
+
+ pci_disable_msi(pdev);
+
+ spin_lock_irqsave(&dev_lock, flags);
+ list_del_init(&dd->remove_list);
+ spin_unlock_irqrestore(&dev_lock, flags);
+
+ if (!dd->sr)
+ kfree(dd);
+ else
+ set_bit(MTIP_DDF_REMOVE_DONE_BIT, &dd->dd_flag);
+
+ pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
+ pci_set_drvdata(pdev, NULL);
+}
+
+/*
+ * Called for each probed device when the device is suspended.
+ *
+ * return value
+ * 0 Success
+ * <0 Error
+ */
+static int mtip_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
+{
+ int rv = 0;
+ struct driver_data *dd = pci_get_drvdata(pdev);
+
+ if (!dd) {
+ dev_err(&pdev->dev,
+ "Driver private datastructure is NULL\n");
+ return -EFAULT;
+ }
+
+ set_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag);
+
+ /* Disable ports & interrupts then send standby immediate */
+ rv = mtip_block_suspend(dd);
+ if (rv < 0) {
+ dev_err(&pdev->dev,
+ "Failed to suspend controller\n");
+ return rv;
+ }
+
+ /*
+ * Save the pci config space to pdev structure &
+ * disable the device
+ */
+ pci_save_state(pdev);
+ pci_disable_device(pdev);
+
+ /* Move to Low power state*/
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return rv;
+}
+
+/*
+ * Called for each probed device when the device is resumed.
+ *
+ * return value
+ * 0 Success
+ * <0 Error
+ */
+static int mtip_pci_resume(struct pci_dev *pdev)
+{
+ int rv = 0;
+ struct driver_data *dd;
+
+ dd = pci_get_drvdata(pdev);
+ if (!dd) {
+ dev_err(&pdev->dev,
+ "Driver private datastructure is NULL\n");
+ return -EFAULT;
+ }
+
+ /* Move the device to active State */
+ pci_set_power_state(pdev, PCI_D0);
+
+ /* Restore PCI configuration space */
+ pci_restore_state(pdev);
+
+ /* Enable the PCI device*/
+ rv = pcim_enable_device(pdev);
+ if (rv < 0) {
+ dev_err(&pdev->dev,
+ "Failed to enable card during resume\n");
+ goto err;
+ }
+ pci_set_master(pdev);
+
+ /*
+ * Calls hbaReset, initPort, & startPort function
+ * then enables interrupts
+ */
+ rv = mtip_block_resume(dd);
+ if (rv < 0)
+ dev_err(&pdev->dev, "Unable to resume\n");
+
+err:
+ clear_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag);
+
+ return rv;
+}
+
+/*
+ * Shutdown routine
+ *
+ * return value
+ * None
+ */
+static void mtip_pci_shutdown(struct pci_dev *pdev)
+{
+ struct driver_data *dd = pci_get_drvdata(pdev);
+ if (dd)
+ mtip_block_shutdown(dd);
+}
+
+/* Table of device ids supported by this driver. */
+static const struct pci_device_id mtip_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320H_DEVICE_ID) },
+ { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320M_DEVICE_ID) },
+ { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320S_DEVICE_ID) },
+ { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P325M_DEVICE_ID) },
+ { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420H_DEVICE_ID) },
+ { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420M_DEVICE_ID) },
+ { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P425M_DEVICE_ID) },
+ { 0 }
+};
+
+/* Structure that describes the PCI driver functions. */
+static struct pci_driver mtip_pci_driver = {
+ .name = MTIP_DRV_NAME,
+ .id_table = mtip_pci_tbl,
+ .probe = mtip_pci_probe,
+ .remove = mtip_pci_remove,
+ .suspend = mtip_pci_suspend,
+ .resume = mtip_pci_resume,
+ .shutdown = mtip_pci_shutdown,
+};
+
+MODULE_DEVICE_TABLE(pci, mtip_pci_tbl);
+
+/*
+ * Module initialization function.
+ *
+ * Called once when the module is loaded. This function allocates a major
+ * block device number to the Cyclone devices and registers the PCI layer
+ * of the driver.
+ *
+ * Return value
+ * 0 on success else error code.
+ */
+static int __init mtip_init(void)
+{
+ int error;
+
+ pr_info(MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n");
+
+ spin_lock_init(&dev_lock);
+
+ INIT_LIST_HEAD(&online_list);
+ INIT_LIST_HEAD(&removing_list);
+
+ /* Allocate a major block device number to use with this driver. */
+ error = register_blkdev(0, MTIP_DRV_NAME);
+ if (error <= 0) {
+ pr_err("Unable to register block device (%d)\n",
+ error);
+ return -EBUSY;
+ }
+ mtip_major = error;
+
+ dfs_parent = debugfs_create_dir("rssd", NULL);
+ if (IS_ERR_OR_NULL(dfs_parent)) {
+ pr_warn("Error creating debugfs parent\n");
+ dfs_parent = NULL;
+ }
+ if (dfs_parent) {
+ dfs_device_status = debugfs_create_file("device_status",
+ S_IRUGO, dfs_parent, NULL,
+ &mtip_device_status_fops);
+ if (IS_ERR_OR_NULL(dfs_device_status)) {
+ pr_err("Error creating device_status node\n");
+ dfs_device_status = NULL;
+ }
+ }
+
+ /* Register our PCI operations. */
+ error = pci_register_driver(&mtip_pci_driver);
+ if (error) {
+ debugfs_remove(dfs_parent);
+ unregister_blkdev(mtip_major, MTIP_DRV_NAME);
+ }
+
+ return error;
+}
+
+/*
+ * Module de-initialization function.
+ *
+ * Called once when the module is unloaded. This function deallocates
+ * the major block device number allocated by mtip_init() and
+ * unregisters the PCI layer of the driver.
+ *
+ * Return value
+ * none
+ */
+static void __exit mtip_exit(void)
+{
+ /* Release the allocated major block device number. */
+ unregister_blkdev(mtip_major, MTIP_DRV_NAME);
+
+ /* Unregister the PCI driver. */
+ pci_unregister_driver(&mtip_pci_driver);
+
+ debugfs_remove_recursive(dfs_parent);
+}
+
+MODULE_AUTHOR("Micron Technology, Inc");
+MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(MTIP_DRV_VERSION);
+
+module_init(mtip_init);
+module_exit(mtip_exit);
Code Review / kvmfornfv.git / blobdiff