![Asai Thambi S P](/assets/img/avatar_default.png)
Dump tagmap on failure, instead of individual tags. Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
4119 lines
99 KiB
C
4119 lines
99 KiB
C
/*
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* Driver for the Micron P320 SSD
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* Copyright (C) 2011 Micron Technology, Inc.
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*
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* Portions of this code were derived from works subjected to the
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* following copyright:
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* Copyright (C) 2009 Integrated Device Technology, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <linux/ata.h>
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#include <linux/delay.h>
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#include <linux/hdreg.h>
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#include <linux/uaccess.h>
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#include <linux/random.h>
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#include <linux/smp.h>
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#include <linux/compat.h>
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/genhd.h>
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#include <linux/blkdev.h>
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#include <linux/bio.h>
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#include <linux/dma-mapping.h>
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#include <linux/idr.h>
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#include <linux/kthread.h>
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#include <../drivers/ata/ahci.h>
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#include <linux/export.h>
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#include "mtip32xx.h"
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#define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32)
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#define HW_CMD_TBL_SZ (AHCI_CMD_TBL_HDR_SZ + (MTIP_MAX_SG * 16))
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#define HW_CMD_TBL_AR_SZ (HW_CMD_TBL_SZ * MTIP_MAX_COMMAND_SLOTS)
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#define HW_PORT_PRIV_DMA_SZ \
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(HW_CMD_SLOT_SZ + HW_CMD_TBL_AR_SZ + AHCI_RX_FIS_SZ)
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#define HOST_CAP_NZDMA (1 << 19)
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#define HOST_HSORG 0xFC
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#define HSORG_DISABLE_SLOTGRP_INTR (1<<24)
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#define HSORG_DISABLE_SLOTGRP_PXIS (1<<16)
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#define HSORG_HWREV 0xFF00
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#define HSORG_STYLE 0x8
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#define HSORG_SLOTGROUPS 0x7
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#define PORT_COMMAND_ISSUE 0x38
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#define PORT_SDBV 0x7C
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#define PORT_OFFSET 0x100
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#define PORT_MEM_SIZE 0x80
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#define PORT_IRQ_ERR \
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(PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \
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PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \
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PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \
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PORT_IRQ_OVERFLOW)
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#define PORT_IRQ_LEGACY \
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(PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS)
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#define PORT_IRQ_HANDLED \
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(PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \
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PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \
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PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)
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#define DEF_PORT_IRQ \
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(PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS)
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/* product numbers */
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#define MTIP_PRODUCT_UNKNOWN 0x00
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#define MTIP_PRODUCT_ASICFPGA 0x11
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/* Device instance number, incremented each time a device is probed. */
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static int instance;
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/*
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* Global variable used to hold the major block device number
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* allocated in mtip_init().
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*/
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static int mtip_major;
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static DEFINE_SPINLOCK(rssd_index_lock);
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static DEFINE_IDA(rssd_index_ida);
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static int mtip_block_initialize(struct driver_data *dd);
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#ifdef CONFIG_COMPAT
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struct mtip_compat_ide_task_request_s {
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__u8 io_ports[8];
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__u8 hob_ports[8];
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ide_reg_valid_t out_flags;
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ide_reg_valid_t in_flags;
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int data_phase;
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int req_cmd;
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compat_ulong_t out_size;
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compat_ulong_t in_size;
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};
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#endif
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/*
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* This function check_for_surprise_removal is called
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* while card is removed from the system and it will
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* read the vendor id from the configration space
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*
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* @pdev Pointer to the pci_dev structure.
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*
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* return value
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* true if device removed, else false
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*/
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static bool mtip_check_surprise_removal(struct pci_dev *pdev)
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{
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u16 vendor_id = 0;
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/* Read the vendorID from the configuration space */
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pci_read_config_word(pdev, 0x00, &vendor_id);
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if (vendor_id == 0xFFFF)
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return true; /* device removed */
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return false; /* device present */
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}
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/*
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* This function is called for clean the pending command in the
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* command slot during the surprise removal of device and return
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* error to the upper layer.
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*
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* @dd Pointer to the DRIVER_DATA structure.
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*
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* return value
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* None
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*/
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static void mtip_command_cleanup(struct driver_data *dd)
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{
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int group = 0, commandslot = 0, commandindex = 0;
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struct mtip_cmd *command;
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struct mtip_port *port = dd->port;
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static int in_progress;
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if (in_progress)
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return;
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in_progress = 1;
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for (group = 0; group < 4; group++) {
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for (commandslot = 0; commandslot < 32; commandslot++) {
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if (!(port->allocated[group] & (1 << commandslot)))
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continue;
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commandindex = group << 5 | commandslot;
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command = &port->commands[commandindex];
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if (atomic_read(&command->active)
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&& (command->async_callback)) {
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command->async_callback(command->async_data,
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-ENODEV);
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command->async_callback = NULL;
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command->async_data = NULL;
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}
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dma_unmap_sg(&port->dd->pdev->dev,
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command->sg,
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command->scatter_ents,
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command->direction);
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}
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}
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up(&port->cmd_slot);
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set_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag);
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in_progress = 0;
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}
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/*
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* Obtain an empty command slot.
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*
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* This function needs to be reentrant since it could be called
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* at the same time on multiple CPUs. The allocation of the
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* command slot must be atomic.
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*
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* @port Pointer to the port data structure.
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*
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* return value
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* >= 0 Index of command slot obtained.
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* -1 No command slots available.
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*/
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static int get_slot(struct mtip_port *port)
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{
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int slot, i;
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unsigned int num_command_slots = port->dd->slot_groups * 32;
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/*
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* Try 10 times, because there is a small race here.
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* that's ok, because it's still cheaper than a lock.
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*
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* Race: Since this section is not protected by lock, same bit
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* could be chosen by different process contexts running in
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* different processor. So instead of costly lock, we are going
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* with loop.
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*/
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for (i = 0; i < 10; i++) {
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slot = find_next_zero_bit(port->allocated,
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num_command_slots, 1);
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if ((slot < num_command_slots) &&
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(!test_and_set_bit(slot, port->allocated)))
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return slot;
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}
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dev_warn(&port->dd->pdev->dev, "Failed to get a tag.\n");
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if (mtip_check_surprise_removal(port->dd->pdev)) {
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/* Device not present, clean outstanding commands */
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mtip_command_cleanup(port->dd);
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}
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return -1;
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}
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/*
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* Release a command slot.
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*
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* @port Pointer to the port data structure.
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* @tag Tag of command to release
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*
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* return value
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* None
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*/
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static inline void release_slot(struct mtip_port *port, int tag)
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{
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smp_mb__before_clear_bit();
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clear_bit(tag, port->allocated);
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smp_mb__after_clear_bit();
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}
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/*
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* Reset the HBA (without sleeping)
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*
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* Just like hba_reset, except does not call sleep, so can be
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* run from interrupt/tasklet context.
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*
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* @dd Pointer to the driver data structure.
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*
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* return value
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* 0 The reset was successful.
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* -1 The HBA Reset bit did not clear.
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*/
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static int hba_reset_nosleep(struct driver_data *dd)
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{
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unsigned long timeout;
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/* Chip quirk: quiesce any chip function */
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mdelay(10);
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/* Set the reset bit */
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writel(HOST_RESET, dd->mmio + HOST_CTL);
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/* Flush */
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readl(dd->mmio + HOST_CTL);
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/*
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* Wait 10ms then spin for up to 1 second
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* waiting for reset acknowledgement
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*/
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timeout = jiffies + msecs_to_jiffies(1000);
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mdelay(10);
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while ((readl(dd->mmio + HOST_CTL) & HOST_RESET)
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&& time_before(jiffies, timeout))
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mdelay(1);
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if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))
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return -1;
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if (readl(dd->mmio + HOST_CTL) & HOST_RESET)
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return -1;
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return 0;
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}
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/*
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* Issue a command to the hardware.
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*
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* Set the appropriate bit in the s_active and Command Issue hardware
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* registers, causing hardware command processing to begin.
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*
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* @port Pointer to the port structure.
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* @tag The tag of the command to be issued.
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*
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* return value
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* None
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*/
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static inline void mtip_issue_ncq_command(struct mtip_port *port, int tag)
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{
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unsigned long flags = 0;
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atomic_set(&port->commands[tag].active, 1);
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spin_lock_irqsave(&port->cmd_issue_lock, flags);
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writel((1 << MTIP_TAG_BIT(tag)),
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port->s_active[MTIP_TAG_INDEX(tag)]);
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writel((1 << MTIP_TAG_BIT(tag)),
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port->cmd_issue[MTIP_TAG_INDEX(tag)]);
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spin_unlock_irqrestore(&port->cmd_issue_lock, flags);
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/* Set the command's timeout value.*/
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port->commands[tag].comp_time = jiffies + msecs_to_jiffies(
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MTIP_NCQ_COMMAND_TIMEOUT_MS);
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}
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/*
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* Enable/disable the reception of FIS
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*
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* @port Pointer to the port data structure
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* @enable 1 to enable, 0 to disable
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*
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* return value
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* Previous state: 1 enabled, 0 disabled
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*/
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static int mtip_enable_fis(struct mtip_port *port, int enable)
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{
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u32 tmp;
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/* enable FIS reception */
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tmp = readl(port->mmio + PORT_CMD);
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if (enable)
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writel(tmp | PORT_CMD_FIS_RX, port->mmio + PORT_CMD);
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else
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writel(tmp & ~PORT_CMD_FIS_RX, port->mmio + PORT_CMD);
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/* Flush */
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readl(port->mmio + PORT_CMD);
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return (((tmp & PORT_CMD_FIS_RX) == PORT_CMD_FIS_RX));
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}
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/*
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* Enable/disable the DMA engine
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*
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* @port Pointer to the port data structure
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* @enable 1 to enable, 0 to disable
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*
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* return value
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* Previous state: 1 enabled, 0 disabled.
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*/
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static int mtip_enable_engine(struct mtip_port *port, int enable)
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{
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u32 tmp;
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/* enable FIS reception */
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tmp = readl(port->mmio + PORT_CMD);
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if (enable)
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writel(tmp | PORT_CMD_START, port->mmio + PORT_CMD);
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else
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writel(tmp & ~PORT_CMD_START, port->mmio + PORT_CMD);
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readl(port->mmio + PORT_CMD);
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return (((tmp & PORT_CMD_START) == PORT_CMD_START));
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}
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/*
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* Enables the port DMA engine and FIS reception.
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*
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* return value
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* None
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*/
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static inline void mtip_start_port(struct mtip_port *port)
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{
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/* Enable FIS reception */
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mtip_enable_fis(port, 1);
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/* Enable the DMA engine */
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mtip_enable_engine(port, 1);
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}
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/*
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* Deinitialize a port by disabling port interrupts, the DMA engine,
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* and FIS reception.
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*
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* @port Pointer to the port structure
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*
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* return value
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* None
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*/
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static inline void mtip_deinit_port(struct mtip_port *port)
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{
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/* Disable interrupts on this port */
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writel(0, port->mmio + PORT_IRQ_MASK);
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/* Disable the DMA engine */
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mtip_enable_engine(port, 0);
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/* Disable FIS reception */
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mtip_enable_fis(port, 0);
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}
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/*
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* Initialize a port.
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*
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* This function deinitializes the port by calling mtip_deinit_port() and
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* then initializes it by setting the command header and RX FIS addresses,
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* clearing the SError register and any pending port interrupts before
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* re-enabling the default set of port interrupts.
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*
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* @port Pointer to the port structure.
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*
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* return value
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* None
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*/
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static void mtip_init_port(struct mtip_port *port)
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{
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int i;
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mtip_deinit_port(port);
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/* Program the command list base and FIS base addresses */
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if (readl(port->dd->mmio + HOST_CAP) & HOST_CAP_64) {
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writel((port->command_list_dma >> 16) >> 16,
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port->mmio + PORT_LST_ADDR_HI);
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writel((port->rxfis_dma >> 16) >> 16,
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port->mmio + PORT_FIS_ADDR_HI);
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}
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writel(port->command_list_dma & 0xFFFFFFFF,
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port->mmio + PORT_LST_ADDR);
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writel(port->rxfis_dma & 0xFFFFFFFF, port->mmio + PORT_FIS_ADDR);
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/* Clear SError */
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writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR);
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/* reset the completed registers.*/
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for (i = 0; i < port->dd->slot_groups; i++)
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writel(0xFFFFFFFF, port->completed[i]);
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/* Clear any pending interrupts for this port */
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writel(readl(port->dd->mmio + PORT_IRQ_STAT),
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port->dd->mmio + PORT_IRQ_STAT);
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/* Clear any pending interrupts on the HBA. */
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writel(readl(port->dd->mmio + HOST_IRQ_STAT),
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port->dd->mmio + HOST_IRQ_STAT);
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/* Enable port interrupts */
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writel(DEF_PORT_IRQ, port->mmio + PORT_IRQ_MASK);
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}
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/*
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* Restart a port
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*
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* @port Pointer to the port data structure.
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*
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* return value
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* None
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*/
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static void mtip_restart_port(struct mtip_port *port)
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{
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unsigned long timeout;
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/* Disable the DMA engine */
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mtip_enable_engine(port, 0);
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/* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */
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timeout = jiffies + msecs_to_jiffies(500);
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while ((readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON)
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&& time_before(jiffies, timeout))
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;
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if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
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return;
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/*
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* Chip quirk: escalate to hba reset if
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* PxCMD.CR not clear after 500 ms
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*/
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if (readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) {
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dev_warn(&port->dd->pdev->dev,
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"PxCMD.CR not clear, escalating reset\n");
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if (hba_reset_nosleep(port->dd))
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dev_err(&port->dd->pdev->dev,
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"HBA reset escalation failed.\n");
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/* 30 ms delay before com reset to quiesce chip */
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mdelay(30);
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}
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dev_warn(&port->dd->pdev->dev, "Issuing COM reset\n");
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/* Set PxSCTL.DET */
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writel(readl(port->mmio + PORT_SCR_CTL) |
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1, port->mmio + PORT_SCR_CTL);
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readl(port->mmio + PORT_SCR_CTL);
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/* Wait 1 ms to quiesce chip function */
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timeout = jiffies + msecs_to_jiffies(1);
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while (time_before(jiffies, timeout))
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;
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if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
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return;
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/* Clear PxSCTL.DET */
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writel(readl(port->mmio + PORT_SCR_CTL) & ~1,
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port->mmio + PORT_SCR_CTL);
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readl(port->mmio + PORT_SCR_CTL);
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|
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/* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */
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timeout = jiffies + msecs_to_jiffies(500);
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while (((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0)
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&& time_before(jiffies, timeout))
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;
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if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
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|
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);
|
|
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
/*
|
|
* Called periodically to see if any read/write commands are
|
|
* taking too long to complete.
|
|
*
|
|
* @data Pointer to the PORT data structure.
|
|
*
|
|
* return value
|
|
* None
|
|
*/
|
|
static void mtip_timeout_function(unsigned long int data)
|
|
{
|
|
struct mtip_port *port = (struct mtip_port *) data;
|
|
struct host_to_dev_fis *fis;
|
|
struct mtip_cmd *command;
|
|
int tag, cmdto_cnt = 0;
|
|
unsigned int bit, group;
|
|
unsigned int num_command_slots = port->dd->slot_groups * 32;
|
|
unsigned long to, tagaccum[SLOTBITS_IN_LONGS];
|
|
|
|
if (unlikely(!port))
|
|
return;
|
|
|
|
if (test_bit(MTIP_DDF_RESUME_BIT, &port->dd->dd_flag)) {
|
|
mod_timer(&port->cmd_timer,
|
|
jiffies + msecs_to_jiffies(30000));
|
|
return;
|
|
}
|
|
/* clear the tag accumulator */
|
|
memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
|
|
|
|
for (tag = 0; tag < num_command_slots; tag++) {
|
|
/*
|
|
* Skip internal command slot as it has
|
|
* its own timeout mechanism
|
|
*/
|
|
if (tag == MTIP_TAG_INTERNAL)
|
|
continue;
|
|
|
|
if (atomic_read(&port->commands[tag].active) &&
|
|
(time_after(jiffies, port->commands[tag].comp_time))) {
|
|
group = tag >> 5;
|
|
bit = tag & 0x1F;
|
|
|
|
command = &port->commands[tag];
|
|
fis = (struct host_to_dev_fis *) command->command;
|
|
|
|
set_bit(tag, tagaccum);
|
|
cmdto_cnt++;
|
|
if (cmdto_cnt == 1)
|
|
set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
|
|
|
|
/*
|
|
* Clear the completed bit. This should prevent
|
|
* any interrupt handlers from trying to retire
|
|
* the command.
|
|
*/
|
|
writel(1 << bit, port->completed[group]);
|
|
|
|
/* Call the async completion callback. */
|
|
if (likely(command->async_callback))
|
|
command->async_callback(command->async_data,
|
|
-EIO);
|
|
command->async_callback = NULL;
|
|
command->comp_func = NULL;
|
|
|
|
/* Unmap the DMA scatter list entries */
|
|
dma_unmap_sg(&port->dd->pdev->dev,
|
|
command->sg,
|
|
command->scatter_ents,
|
|
command->direction);
|
|
|
|
/*
|
|
* Clear the allocated bit and active tag for the
|
|
* command.
|
|
*/
|
|
atomic_set(&port->commands[tag].active, 0);
|
|
release_slot(port, tag);
|
|
|
|
up(&port->cmd_slot);
|
|
}
|
|
}
|
|
|
|
if (cmdto_cnt && !test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) {
|
|
print_tags(port->dd, "timed out", tagaccum, cmdto_cnt);
|
|
|
|
mtip_restart_port(port);
|
|
clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
|
|
wake_up_interruptible(&port->svc_wait);
|
|
}
|
|
|
|
if (port->ic_pause_timer) {
|
|
to = port->ic_pause_timer + msecs_to_jiffies(1000);
|
|
if (time_after(jiffies, to)) {
|
|
if (!test_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);
|
|
clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
|
|
wake_up_interruptible(&port->svc_wait);
|
|
}
|
|
|
|
|
|
}
|
|
}
|
|
|
|
/* Restart the timer */
|
|
mod_timer(&port->cmd_timer,
|
|
jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD));
|
|
}
|
|
|
|
/*
|
|
* 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,
|
|
void *data,
|
|
int status)
|
|
{
|
|
struct mtip_cmd *command;
|
|
struct driver_data *dd = data;
|
|
int cb_status = status ? -EIO : 0;
|
|
|
|
if (unlikely(!dd) || unlikely(!port))
|
|
return;
|
|
|
|
command = &port->commands[tag];
|
|
|
|
if (unlikely(status == PORT_IRQ_TF_ERR)) {
|
|
dev_warn(&port->dd->pdev->dev,
|
|
"Command tag %d failed due to TFE\n", tag);
|
|
}
|
|
|
|
/* Upper layer callback */
|
|
if (likely(command->async_callback))
|
|
command->async_callback(command->async_data, cb_status);
|
|
|
|
command->async_callback = NULL;
|
|
command->comp_func = NULL;
|
|
|
|
/* Unmap the DMA scatter list entries */
|
|
dma_unmap_sg(&dd->pdev->dev,
|
|
command->sg,
|
|
command->scatter_ents,
|
|
command->direction);
|
|
|
|
/* Clear the allocated and active bits for the command */
|
|
atomic_set(&port->commands[tag].active, 0);
|
|
release_slot(port, tag);
|
|
|
|
up(&port->cmd_slot);
|
|
}
|
|
|
|
/*
|
|
* 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,
|
|
void *data,
|
|
int status)
|
|
{
|
|
struct mtip_cmd *command = &port->commands[tag];
|
|
struct completion *waiting = data;
|
|
if (unlikely(status == PORT_IRQ_TF_ERR))
|
|
dev_warn(&port->dd->pdev->dev,
|
|
"Internal command %d completed with TFE\n", tag);
|
|
|
|
command->async_callback = NULL;
|
|
command->comp_func = NULL;
|
|
|
|
complete(waiting);
|
|
}
|
|
|
|
static void mtip_null_completion(struct mtip_port *port,
|
|
int tag,
|
|
void *data,
|
|
int status)
|
|
{
|
|
return;
|
|
}
|
|
|
|
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;
|
|
|
|
/* Stop the timer to prevent command timeouts. */
|
|
del_timer(&port->cmd_timer);
|
|
|
|
/* clear the tag accumulator */
|
|
memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
|
|
|
|
/* Set eh_active */
|
|
set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
|
|
|
|
/* Loop through all the groups */
|
|
for (group = 0; group < dd->slot_groups; group++) {
|
|
completed = readl(port->completed[group]);
|
|
|
|
/* 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 = &port->commands[tag];
|
|
if (likely(cmd->comp_func)) {
|
|
set_bit(tag, tagaccum);
|
|
cmd_cnt++;
|
|
atomic_set(&cmd->active, 0);
|
|
cmd->comp_func(port,
|
|
tag,
|
|
cmd->comp_data,
|
|
0);
|
|
} else {
|
|
dev_err(&port->dd->pdev->dev,
|
|
"Missing completion func for tag %d",
|
|
tag);
|
|
if (mtip_check_surprise_removal(dd->pdev)) {
|
|
mtip_command_cleanup(dd);
|
|
/* 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) {
|
|
dev_info(&dd->pdev->dev,
|
|
"Drive indicates rebuild has failed.\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 = &port->commands[tag];
|
|
|
|
/* If the active bit is set re-issue the command */
|
|
if (atomic_read(&cmd->active) == 0)
|
|
continue;
|
|
|
|
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");
|
|
atomic_set(&cmd->active, 0);
|
|
if (cmd->comp_func) {
|
|
cmd->comp_func(port, tag,
|
|
cmd->comp_data,
|
|
-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);
|
|
atomic_set(&cmd->active, 0);
|
|
|
|
if (cmd->comp_func)
|
|
cmd->comp_func(
|
|
port,
|
|
tag,
|
|
cmd->comp_data,
|
|
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);
|
|
|
|
/* clear eh_active */
|
|
clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
|
|
wake_up_interruptible(&port->svc_wait);
|
|
|
|
mod_timer(&port->cmd_timer,
|
|
jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD));
|
|
}
|
|
|
|
/*
|
|
* Handle a set device bits interrupt
|
|
*/
|
|
static inline void mtip_process_sdbf(struct driver_data *dd)
|
|
{
|
|
struct mtip_port *port = dd->port;
|
|
int group, tag, bit;
|
|
u32 completed;
|
|
struct mtip_cmd *command;
|
|
|
|
/* walk all bits in all slot groups */
|
|
for (group = 0; group < dd->slot_groups; group++) {
|
|
completed = readl(port->completed[group]);
|
|
|
|
/* clear completed status register in the hardware.*/
|
|
writel(completed, port->completed[group]);
|
|
|
|
/* Process completed commands. */
|
|
for (bit = 0;
|
|
(bit < 32) && completed;
|
|
bit++, completed >>= 1) {
|
|
if (completed & 0x01) {
|
|
tag = (group << 5) | bit;
|
|
|
|
/* skip internal command slot. */
|
|
if (unlikely(tag == MTIP_TAG_INTERNAL))
|
|
continue;
|
|
|
|
command = &port->commands[tag];
|
|
/* make internal callback */
|
|
if (likely(command->comp_func)) {
|
|
command->comp_func(
|
|
port,
|
|
tag,
|
|
command->comp_data,
|
|
0);
|
|
} else {
|
|
dev_warn(&dd->pdev->dev,
|
|
"Null completion "
|
|
"for tag %d",
|
|
tag);
|
|
|
|
if (mtip_check_surprise_removal(
|
|
dd->pdev)) {
|
|
mtip_command_cleanup(dd);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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 = &port->commands[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->comp_data,
|
|
0);
|
|
return;
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Demux and handle errors
|
|
*/
|
|
static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat)
|
|
{
|
|
if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR)))
|
|
mtip_handle_tfe(dd);
|
|
|
|
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));
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
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))
|
|
mtip_process_sdbf(dd);
|
|
|
|
if (unlikely(port_stat & PORT_IRQ_ERR)) {
|
|
if (unlikely(mtip_check_surprise_removal(dd->pdev))) {
|
|
mtip_command_cleanup(dd);
|
|
/* 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 */
|
|
writel(hba_stat, dd->mmio + HOST_IRQ_STAT);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* Wrapper for mtip_handle_irq
|
|
* (ignores return code)
|
|
*/
|
|
static void mtip_tasklet(unsigned long data)
|
|
{
|
|
mtip_handle_irq((struct driver_data *) data);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
tasklet_schedule(&dd->tasklet);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void mtip_issue_non_ncq_command(struct mtip_port *port, int tag)
|
|
{
|
|
atomic_set(&port->commands[tag].active, 1);
|
|
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 ((task_file_data & 1) || (fis->command == ATA_CMD_SEC_ERASE_UNIT))
|
|
return false;
|
|
|
|
if (fis->command == ATA_CMD_SEC_ERASE_PREP) {
|
|
set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
|
|
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;
|
|
|
|
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 */
|
|
}
|
|
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
|
|
return -EFAULT;
|
|
/*
|
|
* 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;
|
|
|
|
msleep(20);
|
|
} while (time_before(jiffies, to));
|
|
|
|
return active ? -EBUSY : 0;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
int rv = 0, ready2go = 1;
|
|
struct mtip_cmd *int_cmd = &port->commands[MTIP_TAG_INTERNAL];
|
|
unsigned long to;
|
|
|
|
/* Make sure the buffer is 8 byte aligned. This is asic specific. */
|
|
if (buffer & 0x00000007) {
|
|
dev_err(&port->dd->pdev->dev,
|
|
"SG buffer is not 8 byte aligned\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
to = jiffies + msecs_to_jiffies(timeout);
|
|
do {
|
|
ready2go = !test_and_set_bit(MTIP_TAG_INTERNAL,
|
|
port->allocated);
|
|
if (ready2go)
|
|
break;
|
|
mdelay(100);
|
|
} while (time_before(jiffies, to));
|
|
if (!ready2go) {
|
|
dev_warn(&port->dd->pdev->dev,
|
|
"Internal cmd active. new cmd [%02X]\n", fis->command);
|
|
return -EBUSY;
|
|
}
|
|
set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
|
|
port->ic_pause_timer = 0;
|
|
|
|
if (fis->command == ATA_CMD_SEC_ERASE_UNIT)
|
|
clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
|
|
else if (fis->command == ATA_CMD_DOWNLOAD_MICRO)
|
|
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, 5000) < 0) {
|
|
dev_warn(&port->dd->pdev->dev,
|
|
"Failed to quiesce IO\n");
|
|
release_slot(port, MTIP_TAG_INTERNAL);
|
|
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);
|
|
|
|
/* Poll if atomic, wait_for_completion otherwise */
|
|
if (atomic == GFP_KERNEL) {
|
|
/* Wait for the command to complete or timeout. */
|
|
if (wait_for_completion_timeout(
|
|
&wait,
|
|
msecs_to_jiffies(timeout)) == 0) {
|
|
dev_err(&port->dd->pdev->dev,
|
|
"Internal command did not complete [%d] "
|
|
"within timeout of %lu ms\n",
|
|
atomic, timeout);
|
|
if (mtip_check_surprise_removal(port->dd->pdev) ||
|
|
test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
|
|
&port->dd->dd_flag)) {
|
|
rv = -ENXIO;
|
|
goto exec_ic_exit;
|
|
}
|
|
rv = -EAGAIN;
|
|
}
|
|
|
|
if (readl(port->cmd_issue[MTIP_TAG_INTERNAL])
|
|
& (1 << MTIP_TAG_INTERNAL)) {
|
|
dev_warn(&port->dd->pdev->dev,
|
|
"Retiring internal command but CI is 1.\n");
|
|
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
|
|
&port->dd->dd_flag)) {
|
|
hba_reset_nosleep(port->dd);
|
|
rv = -ENXIO;
|
|
} else {
|
|
mtip_restart_port(port);
|
|
rv = -EAGAIN;
|
|
}
|
|
goto exec_ic_exit;
|
|
}
|
|
|
|
} else {
|
|
/* 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(port->dd->pdev)) {
|
|
rv = -ENXIO;
|
|
goto exec_ic_exit;
|
|
}
|
|
if ((fis->command != ATA_CMD_STANDBYNOW1) &&
|
|
test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
|
|
&port->dd->dd_flag)) {
|
|
rv = -ENXIO;
|
|
goto exec_ic_exit;
|
|
}
|
|
}
|
|
|
|
if (readl(port->cmd_issue[MTIP_TAG_INTERNAL])
|
|
& (1 << MTIP_TAG_INTERNAL)) {
|
|
dev_err(&port->dd->pdev->dev,
|
|
"Internal command did not complete [atomic]\n");
|
|
rv = -EAGAIN;
|
|
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
|
|
&port->dd->dd_flag)) {
|
|
hba_reset_nosleep(port->dd);
|
|
rv = -ENXIO;
|
|
} else {
|
|
mtip_restart_port(port);
|
|
rv = -EAGAIN;
|
|
}
|
|
}
|
|
}
|
|
exec_ic_exit:
|
|
/* Clear the allocated and active bits for the internal command. */
|
|
atomic_set(&int_cmd->active, 0);
|
|
release_slot(port, MTIP_TAG_INTERNAL);
|
|
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]);
|
|
}
|
|
|
|
/*
|
|
* 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_INTERNAL_COMMAND_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
|
|
|
|
/* 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;
|
|
|
|
/* Build the FIS. */
|
|
memset(&fis, 0, sizeof(struct host_to_dev_fis));
|
|
fis.type = 0x27;
|
|
fis.opts = 1 << 7;
|
|
fis.command = ATA_CMD_STANDBYNOW1;
|
|
|
|
start = jiffies;
|
|
rv = mtip_exec_internal_command(port,
|
|
&fis,
|
|
5,
|
|
0,
|
|
0,
|
|
0,
|
|
GFP_ATOMIC,
|
|
15000);
|
|
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_INTERNAL_COMMAND_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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
/*
|
|
* Reset the HBA.
|
|
*
|
|
* Resets the HBA by setting the HBA Reset bit in the Global
|
|
* HBA Control register. After setting the HBA Reset bit the
|
|
* function waits for 1 second before reading the HBA Reset
|
|
* bit to make sure it has cleared. If HBA Reset is not clear
|
|
* an error is returned. Cannot be used in non-blockable
|
|
* context.
|
|
*
|
|
* @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)
|
|
{
|
|
mtip_deinit_port(dd->port);
|
|
|
|
/* Set the reset bit */
|
|
writel(HOST_RESET, dd->mmio + HOST_CTL);
|
|
|
|
/* Flush */
|
|
readl(dd->mmio + HOST_CTL);
|
|
|
|
/* Wait for reset to clear */
|
|
ssleep(1);
|
|
|
|
/* Check the bit has cleared */
|
|
if (readl(dd->mmio + HOST_CTL) & HOST_RESET) {
|
|
dev_err(&dd->pdev->dev,
|
|
"Reset bit did not clear.\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
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);
|
|
|
|
/* 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*/
|
|
|
|
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,
|
|
MTIP_IOCTL_COMMAND_TIMEOUT_MS) < 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 = (port->rxfis + RX_FIS_D2H_REG);
|
|
|
|
/* 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;
|
|
}
|
|
|
|
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]);
|
|
|
|
memset(port->sector_buffer, 0x00, ATA_SECT_SIZE);
|
|
|
|
/* Execute the command. */
|
|
if (mtip_exec_internal_command(port,
|
|
&fis,
|
|
5,
|
|
port->sector_buffer_dma,
|
|
(command[3] != 0) ? ATA_SECT_SIZE : 0,
|
|
0,
|
|
GFP_KERNEL,
|
|
MTIP_IOCTL_COMMAND_TIMEOUT_MS)
|
|
< 0) {
|
|
return -1;
|
|
}
|
|
|
|
/* Collect the completion status. */
|
|
command[0] = reply->command; /* Status*/
|
|
command[1] = reply->features; /* Error*/
|
|
command[2] = command[3];
|
|
|
|
dbg_printk(MTIP_DRV_NAME
|
|
" %s: Completion Status: stat %x, "
|
|
"err %x, cmd %x\n",
|
|
__func__,
|
|
command[0],
|
|
command[1],
|
|
command[2]);
|
|
|
|
if (user_buffer && command[3]) {
|
|
if (copy_to_user(user_buffer,
|
|
port->sector_buffer,
|
|
ATA_SECT_SIZE * command[3])) {
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 = MTIP_IOCTL_COMMAND_TIMEOUT_MS;
|
|
unsigned int force_single_sector;
|
|
unsigned int transfer_size;
|
|
unsigned long task_file_data;
|
|
int intotal = outtotal + req_task->out_size;
|
|
|
|
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);
|
|
|
|
switch (fis.command) {
|
|
case ATA_CMD_DOWNLOAD_MICRO:
|
|
/* Change timeout for Download Microcode to 2 minutes */
|
|
timeout = 120000;
|
|
break;
|
|
case ATA_CMD_SEC_ERASE_UNIT:
|
|
/* Change timeout for Security Erase Unit to 4 minutes.*/
|
|
timeout = 240000;
|
|
break;
|
|
case ATA_CMD_STANDBYNOW1:
|
|
/* Change timeout for standby immediate to 10 seconds.*/
|
|
timeout = 10000;
|
|
break;
|
|
case 0xF7:
|
|
case 0xFA:
|
|
/* Change timeout for vendor unique command to 10 secs */
|
|
timeout = 10000;
|
|
break;
|
|
case ATA_CMD_SMART:
|
|
/* Change timeout for vendor unique command to 15 secs */
|
|
timeout = 15000;
|
|
break;
|
|
default:
|
|
timeout = MTIP_IOCTL_COMMAND_TIMEOUT_MS;
|
|
break;
|
|
}
|
|
|
|
/* 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 (mtip_get_identify(dd->port, (void __user *) arg) < 0) {
|
|
dev_warn(&dd->pdev->dev,
|
|
"Unable to read identity\n");
|
|
return -EIO;
|
|
}
|
|
|
|
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, sector_t start,
|
|
int nsect, int nents, int tag, void *callback,
|
|
void *data, int dir)
|
|
{
|
|
struct host_to_dev_fis *fis;
|
|
struct mtip_port *port = dd->port;
|
|
struct mtip_cmd *command = &port->commands[tag];
|
|
int dma_dir = (dir == READ) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
|
|
|
|
/* Map the scatter list for DMA access */
|
|
nents = dma_map_sg(&dd->pdev->dev, command->sg, nents, dma_dir);
|
|
|
|
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;
|
|
fis->command =
|
|
(dir == READ ? ATA_CMD_FPDMA_READ : ATA_CMD_FPDMA_WRITE);
|
|
*((unsigned int *) &fis->lba_low) = (start & 0xFFFFFF);
|
|
*((unsigned int *) &fis->lba_low_ex) = ((start >> 24) & 0xFFFFFF);
|
|
fis->device = 1 << 6;
|
|
fis->features = nsect & 0xFF;
|
|
fis->features_ex = (nsect >> 8) & 0xFF;
|
|
fis->sect_count = ((tag << 3) | (tag >> 5));
|
|
fis->sect_cnt_ex = 0;
|
|
fis->control = 0;
|
|
fis->res2 = 0;
|
|
fis->res3 = 0;
|
|
fill_command_sg(dd, command, nents);
|
|
|
|
/* 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;
|
|
|
|
/*
|
|
* Set the completion function and data for the command passed
|
|
* from the upper layer.
|
|
*/
|
|
command->async_data = data;
|
|
command->async_callback = callback;
|
|
|
|
/*
|
|
* To prevent this command from being issued
|
|
* if an internal command is in progress or error handling is active.
|
|
*/
|
|
if (port->flags & MTIP_PF_PAUSE_IO) {
|
|
set_bit(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, tag);
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Release a command slot.
|
|
*
|
|
* @dd Pointer to the driver data structure.
|
|
* @tag Slot tag
|
|
*
|
|
* return value
|
|
* None
|
|
*/
|
|
static void mtip_hw_release_scatterlist(struct driver_data *dd, int tag)
|
|
{
|
|
release_slot(dd->port, tag);
|
|
}
|
|
|
|
/*
|
|
* Obtain a command slot and return its associated scatter list.
|
|
*
|
|
* @dd Pointer to the driver data structure.
|
|
* @tag Pointer to an int that will receive the allocated command
|
|
* slot tag.
|
|
*
|
|
* return value
|
|
* Pointer to the scatter list for the allocated command slot
|
|
* or NULL if no command slots are available.
|
|
*/
|
|
static struct scatterlist *mtip_hw_get_scatterlist(struct driver_data *dd,
|
|
int *tag)
|
|
{
|
|
/*
|
|
* It is possible that, even with this semaphore, a thread
|
|
* may think that no command slots are available. Therefore, we
|
|
* need to make an attempt to get_slot().
|
|
*/
|
|
down(&dd->port->cmd_slot);
|
|
*tag = get_slot(dd->port);
|
|
|
|
if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) {
|
|
up(&dd->port->cmd_slot);
|
|
return NULL;
|
|
}
|
|
if (unlikely(*tag < 0))
|
|
return NULL;
|
|
|
|
return dd->port->commands[*tag].sg;
|
|
}
|
|
|
|
/*
|
|
* Sysfs register/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_registers(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
u32 group_allocated;
|
|
struct driver_data *dd = dev_to_disk(dev)->private_data;
|
|
int size = 0;
|
|
int n;
|
|
|
|
size += sprintf(&buf[size], "S ACTive:\n");
|
|
|
|
for (n = 0; n < dd->slot_groups; n++)
|
|
size += sprintf(&buf[size], "0x%08x\n",
|
|
readl(dd->port->s_active[n]));
|
|
|
|
size += sprintf(&buf[size], "Command Issue:\n");
|
|
|
|
for (n = 0; n < dd->slot_groups; n++)
|
|
size += sprintf(&buf[size], "0x%08x\n",
|
|
readl(dd->port->cmd_issue[n]));
|
|
|
|
size += sprintf(&buf[size], "Allocated:\n");
|
|
|
|
for (n = 0; n < dd->slot_groups; 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], "0x%08x\n",
|
|
group_allocated);
|
|
}
|
|
|
|
size += sprintf(&buf[size], "Completed:\n");
|
|
|
|
for (n = 0; n < dd->slot_groups; n++)
|
|
size += sprintf(&buf[size], "0x%08x\n",
|
|
readl(dd->port->completed[n]));
|
|
|
|
size += sprintf(&buf[size], "PORT IRQ STAT : 0x%08x\n",
|
|
readl(dd->port->mmio + PORT_IRQ_STAT));
|
|
size += sprintf(&buf[size], "HOST IRQ STAT : 0x%08x\n",
|
|
readl(dd->mmio + HOST_IRQ_STAT));
|
|
|
|
return size;
|
|
}
|
|
|
|
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(registers, S_IRUGO, mtip_hw_show_registers, NULL);
|
|
static DEVICE_ATTR(status, S_IRUGO, mtip_hw_show_status, NULL);
|
|
|
|
/*
|
|
* 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_registers.attr))
|
|
dev_warn(&dd->pdev->dev,
|
|
"Error creating 'registers' sysfs entry\n");
|
|
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_registers.attr);
|
|
sysfs_remove_file(kobj, &dev_attr_status.attr);
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
while (1) {
|
|
/*
|
|
* 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));
|
|
|
|
if (kthread_should_stop())
|
|
break;
|
|
|
|
if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
|
|
&dd->dd_flag)))
|
|
break;
|
|
|
|
set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
|
|
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);
|
|
} else if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) {
|
|
if (!mtip_ftl_rebuild_poll(dd))
|
|
set_bit(MTIP_DDF_REBUILD_FAILED_BIT,
|
|
&dd->dd_flag);
|
|
clear_bit(MTIP_PF_REBUILD_BIT, &port->flags);
|
|
}
|
|
clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
|
|
|
|
if (test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
unsigned char *buf;
|
|
struct smart_attr attr242;
|
|
|
|
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);
|
|
|
|
tasklet_init(&dd->tasklet, mtip_tasklet, (unsigned long)dd);
|
|
|
|
dd->port = kzalloc(sizeof(struct mtip_port), GFP_KERNEL);
|
|
if (!dd->port) {
|
|
dev_err(&dd->pdev->dev,
|
|
"Memory allocation: port structure\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Counting semaphore to track command slot usage */
|
|
sema_init(&dd->port->cmd_slot, num_command_slots - 1);
|
|
|
|
/* Spinlock to prevent concurrent issue */
|
|
spin_lock_init(&dd->port->cmd_issue_lock);
|
|
|
|
/* Set the port mmio base address. */
|
|
dd->port->mmio = dd->mmio + PORT_OFFSET;
|
|
dd->port->dd = dd;
|
|
|
|
/* Allocate memory for the command list. */
|
|
dd->port->command_list =
|
|
dmam_alloc_coherent(&dd->pdev->dev,
|
|
HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4),
|
|
&dd->port->command_list_dma,
|
|
GFP_KERNEL);
|
|
if (!dd->port->command_list) {
|
|
dev_err(&dd->pdev->dev,
|
|
"Memory allocation: command list\n");
|
|
rv = -ENOMEM;
|
|
goto out1;
|
|
}
|
|
|
|
/* Clear the memory we have allocated. */
|
|
memset(dd->port->command_list,
|
|
0,
|
|
HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4));
|
|
|
|
/* Setup the addresse of the RX FIS. */
|
|
dd->port->rxfis = dd->port->command_list + HW_CMD_SLOT_SZ;
|
|
dd->port->rxfis_dma = dd->port->command_list_dma + HW_CMD_SLOT_SZ;
|
|
|
|
/* Setup the address of the command tables. */
|
|
dd->port->command_table = dd->port->rxfis + AHCI_RX_FIS_SZ;
|
|
dd->port->command_tbl_dma = dd->port->rxfis_dma + AHCI_RX_FIS_SZ;
|
|
|
|
/* Setup the address of the identify data. */
|
|
dd->port->identify = dd->port->command_table +
|
|
HW_CMD_TBL_AR_SZ;
|
|
dd->port->identify_dma = dd->port->command_tbl_dma +
|
|
HW_CMD_TBL_AR_SZ;
|
|
|
|
/* Setup the address of the sector buffer - for some non-ncq cmds */
|
|
dd->port->sector_buffer = (void *) dd->port->identify + ATA_SECT_SIZE;
|
|
dd->port->sector_buffer_dma = dd->port->identify_dma + ATA_SECT_SIZE;
|
|
|
|
/* Setup the address of the log buf - for read log command */
|
|
dd->port->log_buf = (void *)dd->port->sector_buffer + ATA_SECT_SIZE;
|
|
dd->port->log_buf_dma = dd->port->sector_buffer_dma + ATA_SECT_SIZE;
|
|
|
|
/* Setup the address of the smart buf - for smart read data command */
|
|
dd->port->smart_buf = (void *)dd->port->log_buf + ATA_SECT_SIZE;
|
|
dd->port->smart_buf_dma = dd->port->log_buf_dma + ATA_SECT_SIZE;
|
|
|
|
|
|
/* Point the command headers at the command tables. */
|
|
for (i = 0; i < num_command_slots; i++) {
|
|
dd->port->commands[i].command_header =
|
|
dd->port->command_list +
|
|
(sizeof(struct mtip_cmd_hdr) * i);
|
|
dd->port->commands[i].command_header_dma =
|
|
dd->port->command_list_dma +
|
|
(sizeof(struct mtip_cmd_hdr) * i);
|
|
|
|
dd->port->commands[i].command =
|
|
dd->port->command_table + (HW_CMD_TBL_SZ * i);
|
|
dd->port->commands[i].command_dma =
|
|
dd->port->command_tbl_dma + (HW_CMD_TBL_SZ * i);
|
|
|
|
if (readl(dd->mmio + HOST_CAP) & HOST_CAP_64)
|
|
dd->port->commands[i].command_header->ctbau =
|
|
__force_bit2int cpu_to_le32(
|
|
(dd->port->commands[i].command_dma >> 16) >> 16);
|
|
dd->port->commands[i].command_header->ctba =
|
|
__force_bit2int cpu_to_le32(
|
|
dd->port->commands[i].command_dma & 0xFFFFFFFF);
|
|
|
|
/*
|
|
* If this is not done, a bug is reported by the stock
|
|
* FC11 i386. Due to the fact that it has lots of kernel
|
|
* debugging enabled.
|
|
*/
|
|
sg_init_table(dd->port->commands[i].sg, MTIP_MAX_SG);
|
|
|
|
/* Mark all commands as currently inactive.*/
|
|
atomic_set(&dd->port->commands[i].active, 0);
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* Enable interrupts on the HBA. */
|
|
writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
|
|
dd->mmio + HOST_CTL);
|
|
|
|
init_timer(&dd->port->cmd_timer);
|
|
init_waitqueue_head(&dd->port->svc_wait);
|
|
|
|
dd->port->cmd_timer.data = (unsigned long int) dd->port;
|
|
dd->port->cmd_timer.function = mtip_timeout_function;
|
|
mod_timer(&dd->port->cmd_timer,
|
|
jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD));
|
|
|
|
|
|
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) {
|
|
rv = -EFAULT;
|
|
goto out3;
|
|
}
|
|
|
|
if (mtip_get_identify(dd->port, NULL) < 0) {
|
|
rv = -EFAULT;
|
|
goto out3;
|
|
}
|
|
|
|
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: %d%% (%d blocks)\n",
|
|
attr242.cur, attr242.data);
|
|
return rv;
|
|
|
|
out3:
|
|
del_timer_sync(&dd->port->cmd_timer);
|
|
|
|
/* Disable interrupts on the HBA. */
|
|
writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
|
|
dd->mmio + HOST_CTL);
|
|
|
|
/*Release the IRQ. */
|
|
devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
|
|
|
|
out2:
|
|
mtip_deinit_port(dd->port);
|
|
|
|
/* Free the command/command header memory. */
|
|
dmam_free_coherent(&dd->pdev->dev,
|
|
HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4),
|
|
dd->port->command_list,
|
|
dd->port->command_list_dma);
|
|
out1:
|
|
/* Free the memory allocated for the for structure. */
|
|
kfree(dd->port);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* 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 (!test_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag)) {
|
|
|
|
if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags))
|
|
if (mtip_standby_immediate(dd->port))
|
|
dev_warn(&dd->pdev->dev,
|
|
"STANDBY IMMEDIATE failed\n");
|
|
|
|
/* 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);
|
|
}
|
|
|
|
del_timer_sync(&dd->port->cmd_timer);
|
|
|
|
/* Release the IRQ. */
|
|
devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
|
|
|
|
/* Stop the bottom half tasklet. */
|
|
tasklet_kill(&dd->tasklet);
|
|
|
|
/* Free the command/command header memory. */
|
|
dmam_free_coherent(&dd->pdev->dev,
|
|
HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4),
|
|
dd->port->command_list,
|
|
dd->port->command_list_dma);
|
|
/* Free the memory allocated for the for structure. */
|
|
kfree(dd->port);
|
|
|
|
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.
|
|
*/
|
|
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.
|
|
* @bio Pointer to the BIO.
|
|
*
|
|
*/
|
|
static void mtip_make_request(struct request_queue *queue, struct bio *bio)
|
|
{
|
|
struct driver_data *dd = queue->queuedata;
|
|
struct scatterlist *sg;
|
|
struct bio_vec *bvec;
|
|
int nents = 0;
|
|
int tag = 0;
|
|
|
|
if (unlikely(dd->dd_flag & MTIP_DDF_STOP_IO)) {
|
|
if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
|
|
&dd->dd_flag))) {
|
|
bio_endio(bio, -ENXIO);
|
|
return;
|
|
}
|
|
if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))) {
|
|
bio_endio(bio, -ENODATA);
|
|
return;
|
|
}
|
|
if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT,
|
|
&dd->dd_flag) &&
|
|
bio_data_dir(bio))) {
|
|
bio_endio(bio, -ENODATA);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (unlikely(!bio_has_data(bio))) {
|
|
blk_queue_flush(queue, 0);
|
|
bio_endio(bio, 0);
|
|
return;
|
|
}
|
|
|
|
sg = mtip_hw_get_scatterlist(dd, &tag);
|
|
if (likely(sg != NULL)) {
|
|
blk_queue_bounce(queue, &bio);
|
|
|
|
if (unlikely((bio)->bi_vcnt > MTIP_MAX_SG)) {
|
|
dev_warn(&dd->pdev->dev,
|
|
"Maximum number of SGL entries exceeded\n");
|
|
bio_io_error(bio);
|
|
mtip_hw_release_scatterlist(dd, tag);
|
|
return;
|
|
}
|
|
|
|
/* Create the scatter list for this bio. */
|
|
bio_for_each_segment(bvec, bio, nents) {
|
|
sg_set_page(&sg[nents],
|
|
bvec->bv_page,
|
|
bvec->bv_len,
|
|
bvec->bv_offset);
|
|
}
|
|
|
|
/* Issue the read/write. */
|
|
mtip_hw_submit_io(dd,
|
|
bio->bi_sector,
|
|
bio_sectors(bio),
|
|
nents,
|
|
tag,
|
|
bio_endio,
|
|
bio,
|
|
bio_data_dir(bio));
|
|
} else
|
|
bio_io_error(bio);
|
|
}
|
|
|
|
/*
|
|
* 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 */
|
|
|
|
/* Initialize the protocol layer. */
|
|
wait_for_rebuild = mtip_hw_init(dd);
|
|
if (wait_for_rebuild < 0) {
|
|
dev_err(&dd->pdev->dev,
|
|
"Protocol layer initialization failed\n");
|
|
rv = -EINVAL;
|
|
goto protocol_init_error;
|
|
}
|
|
|
|
dd->disk = alloc_disk(MTIP_MAX_MINORS);
|
|
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;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
skip_create_disk:
|
|
/* Allocate the request queue. */
|
|
dd->queue = blk_alloc_queue(GFP_KERNEL);
|
|
if (dd->queue == NULL) {
|
|
dev_err(&dd->pdev->dev,
|
|
"Unable to allocate request queue\n");
|
|
rv = -ENOMEM;
|
|
goto block_queue_alloc_init_error;
|
|
}
|
|
|
|
/* Attach our request function to the request queue. */
|
|
blk_queue_make_request(dd->queue, mtip_make_request);
|
|
|
|
dd->disk->queue = dd->queue;
|
|
dd->queue->queuedata = dd;
|
|
|
|
/* Set device limits. */
|
|
set_bit(QUEUE_FLAG_NONROT, &dd->queue->queue_flags);
|
|
blk_queue_max_segments(dd->queue, MTIP_MAX_SG);
|
|
blk_queue_physical_block_size(dd->queue, 4096);
|
|
blk_queue_io_min(dd->queue, 4096);
|
|
/*
|
|
* 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);
|
|
|
|
/* 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);
|
|
|
|
/*
|
|
* 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_run(mtip_service_thread,
|
|
dd, 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;
|
|
}
|
|
|
|
if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC)
|
|
rv = wait_for_rebuild;
|
|
|
|
return rv;
|
|
|
|
kthread_run_error:
|
|
/* Delete our gendisk. This also removes the device from /dev */
|
|
del_gendisk(dd->disk);
|
|
|
|
read_capacity_error:
|
|
blk_cleanup_queue(dd->queue);
|
|
|
|
block_queue_alloc_init_error:
|
|
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->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);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Delete our gendisk structure. This also removes the device
|
|
* from /dev
|
|
*/
|
|
del_gendisk(dd->disk);
|
|
|
|
spin_lock(&rssd_index_lock);
|
|
ida_remove(&rssd_index_ida, dd->index);
|
|
spin_unlock(&rssd_index_lock);
|
|
|
|
blk_cleanup_queue(dd->queue);
|
|
dd->disk = NULL;
|
|
dd->queue = NULL;
|
|
|
|
/* 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)
|
|
{
|
|
dev_info(&dd->pdev->dev,
|
|
"Shutting down %s ...\n", dd->disk->disk_name);
|
|
|
|
/* Delete our gendisk structure, and cleanup the blk queue. */
|
|
del_gendisk(dd->disk);
|
|
|
|
spin_lock(&rssd_index_lock);
|
|
ida_remove(&rssd_index_ida, dd->index);
|
|
spin_unlock(&rssd_index_lock);
|
|
|
|
blk_cleanup_queue(dd->queue);
|
|
dd->disk = NULL;
|
|
dd->queue = NULL;
|
|
|
|
mtip_hw_shutdown(dd);
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/* Allocate memory for this devices private data. */
|
|
dd = kzalloc(sizeof(struct driver_data), GFP_KERNEL);
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
pci_set_master(pdev);
|
|
|
|
if (pci_enable_msi(pdev)) {
|
|
dev_warn(&pdev->dev,
|
|
"Unable to enable MSI interrupt.\n");
|
|
goto block_initialize_err;
|
|
}
|
|
|
|
/* Copy the info we may need later into the private data structure. */
|
|
dd->major = mtip_major;
|
|
dd->instance = instance;
|
|
dd->pdev = 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);
|
|
goto done;
|
|
|
|
block_initialize_err:
|
|
pci_disable_msi(pdev);
|
|
|
|
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);
|
|
int counter = 0;
|
|
|
|
set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag);
|
|
|
|
if (mtip_check_surprise_removal(pdev)) {
|
|
while (!test_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag)) {
|
|
counter++;
|
|
msleep(20);
|
|
if (counter == 10) {
|
|
/* Cleanup the outstanding commands */
|
|
mtip_command_cleanup(dd);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Clean up the block layer. */
|
|
mtip_block_remove(dd);
|
|
|
|
pci_disable_msi(pdev);
|
|
|
|
kfree(dd);
|
|
pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
|
|
}
|
|
|
|
/*
|
|
* 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 DEFINE_PCI_DEVICE_TABLE(mtip_pci_tbl) = {
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320_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;
|
|
|
|
printk(KERN_INFO MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n");
|
|
|
|
/* Allocate a major block device number to use with this driver. */
|
|
error = register_blkdev(0, MTIP_DRV_NAME);
|
|
if (error <= 0) {
|
|
printk(KERN_ERR "Unable to register block device (%d)\n",
|
|
error);
|
|
return -EBUSY;
|
|
}
|
|
mtip_major = error;
|
|
|
|
/* Register our PCI operations. */
|
|
error = pci_register_driver(&mtip_pci_driver);
|
|
if (error)
|
|
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);
|
|
}
|
|
|
|
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);
|