// SPDX-License-Identifier: GPL-2.0-or-later /************************************************************************** * Initio 9100 device driver for Linux. * * Copyright (c) 1994-1998 Initio Corporation * Copyright (c) 1998 Bas Vermeulen <[email protected]> * Copyright (c) 2004 Christoph Hellwig <[email protected]> * Copyright (c) 2007 Red Hat * ************************************************************************* * * DESCRIPTION: * * This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host * adapters * * 08/06/97 hc - v1.01h * - Support inic-940 and inic-935 * 09/26/97 hc - v1.01i * - Make correction from J.W. Schultz suggestion * 10/13/97 hc - Support reset function * 10/21/97 hc - v1.01j * - Support 32 LUN (SCSI 3) * 01/14/98 hc - v1.01k * - Fix memory allocation problem * 03/04/98 hc - v1.01l * - Fix tape rewind which will hang the system problem * - Set can_queue to initio_num_scb * 06/25/98 hc - v1.01m * - Get it work for kernel version >= 2.1.75 * - Dynamic assign SCSI bus reset holding time in initio_init() * 07/02/98 hc - v1.01n * - Support 0002134A * 08/07/98 hc - v1.01o * - Change the initio_abort_srb routine to use scsi_done. <01> * 09/07/98 hl - v1.02 * - Change the INI9100U define and proc_dir_entry to * reflect the newer Kernel 2.1.118, but the v1.o1o * should work with Kernel 2.1.118. * 09/20/98 wh - v1.02a * - Support Abort command. * - Handle reset routine. * 09/21/98 hl - v1.03 * - remove comments. * 12/09/98 bv - v1.03a * - Removed unused code * 12/13/98 bv - v1.03b * - Remove cli() locking for kernels >= 2.1.95. This uses * spinlocks to serialize access to the pSRB_head and * pSRB_tail members of the HCS structure. * 09/01/99 bv - v1.03d * - Fixed a deadlock problem in SMP. * 21/01/99 bv - v1.03e * - Add support for the Domex 3192U PCI SCSI * This is a slightly modified patch by * Brian Macy <[email protected]> * 22/02/99 bv - v1.03f * - Didn't detect the INIC-950 in 2.0.x correctly. * Now fixed. * 05/07/99 bv - v1.03g * - Changed the assumption that HZ = 100 * 10/17/03 mc - v1.04 * - added new DMA API support * 06/01/04 jmd - v1.04a * - Re-add reset_bus support **************************************************************************/ #include <linux/module.h> #include <linux/errno.h> #include <linux/delay.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/blkdev.h> #include <linux/spinlock.h> #include <linux/stat.h> #include <linux/kernel.h> #include <linux/proc_fs.h> #include <linux/string.h> #include <linux/interrupt.h> #include <linux/ioport.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/dma-mapping.h> #include <asm/io.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> #include <scsi/scsi_tcq.h> #include "initio.h" #define SENSE_SIZE … #define i91u_MAXQUEUE … #define i91u_REVID … #ifdef DEBUG_i91u static unsigned int i91u_debug = DEBUG_DEFAULT; #endif static int initio_tag_enable = …; #ifdef DEBUG_i91u static int setup_debug = 0; #endif static void i91uSCBPost(u8 * pHcb, u8 * pScb); #define DEBUG_INTERRUPT … #define DEBUG_QUEUE … #define DEBUG_STATE … #define INT_DISC … /*--- forward references ---*/ static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun); static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host); static int tulip_main(struct initio_host * host); static int initio_next_state(struct initio_host * host); static int initio_state_1(struct initio_host * host); static int initio_state_2(struct initio_host * host); static int initio_state_3(struct initio_host * host); static int initio_state_4(struct initio_host * host); static int initio_state_5(struct initio_host * host); static int initio_state_6(struct initio_host * host); static int initio_state_7(struct initio_host * host); static int initio_xfer_data_in(struct initio_host * host); static int initio_xfer_data_out(struct initio_host * host); static int initio_xpad_in(struct initio_host * host); static int initio_xpad_out(struct initio_host * host); static int initio_status_msg(struct initio_host * host); static int initio_msgin(struct initio_host * host); static int initio_msgin_sync(struct initio_host * host); static int initio_msgin_accept(struct initio_host * host); static int initio_msgout_reject(struct initio_host * host); static int initio_msgin_extend(struct initio_host * host); static int initio_msgout_ide(struct initio_host * host); static int initio_msgout_abort_targ(struct initio_host * host); static int initio_msgout_abort_tag(struct initio_host * host); static int initio_bus_device_reset(struct initio_host * host); static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb); static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb); static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb); static int int_initio_busfree(struct initio_host * host); static int int_initio_scsi_rst(struct initio_host * host); static int int_initio_bad_seq(struct initio_host * host); static int int_initio_resel(struct initio_host * host); static int initio_sync_done(struct initio_host * host); static int wdtr_done(struct initio_host * host); static int wait_tulip(struct initio_host * host); static int initio_wait_done_disc(struct initio_host * host); static int initio_wait_disc(struct initio_host * host); static void tulip_scsi(struct initio_host * host); static int initio_post_scsi_rst(struct initio_host * host); static void initio_se2_ew_en(unsigned long base); static void initio_se2_ew_ds(unsigned long base); static int initio_se2_rd_all(unsigned long base); static void initio_se2_update_all(unsigned long base); /* setup default pattern */ static void initio_read_eeprom(unsigned long base); /* ---- INTERNAL VARIABLES ---- */ static NVRAM i91unvram; static NVRAM *i91unvramp; static u8 i91udftNvRam[64] = …; /* - CheckSum - */ static u8 initio_rate_tbl[8] = …/* fast 20 */ { … }; static void initio_do_pause(unsigned amount) { … } /*-- forward reference --*/ /****************************************************************** Input: instruction for Serial E2PROM EX: se2_rd(0 call se2_instr() to send address and read command StartBit OP_Code Address Data --------- -------- ------------------ ------- 1 1 , 0 A5,A4,A3,A2,A1,A0 D15-D0 +----------------------------------------------------- | CS -----+ +--+ +--+ +--+ +--+ +--+ ^ | ^ | ^ | ^ | ^ | | | | | | | | | | | CLK -------+ +--+ +--+ +--+ +--+ +-- (leading edge trigger) +--1-----1--+ | SB OP | OP A5 A4 DI ----+ +--0------------------ (address and cmd sent to nvram) -------------------------------------------+ | DO +--- (data sent from nvram) ******************************************************************/ /** * initio_se2_instr - bitbang an instruction * @base: Base of InitIO controller * @instr: Instruction for serial E2PROM * * Bitbang an instruction out to the serial E2Prom */ static void initio_se2_instr(unsigned long base, u8 instr) { … } /** * initio_se2_ew_en - Enable erase/write * @base: Base address of InitIO controller * * Enable erase/write state of serial EEPROM */ void initio_se2_ew_en(unsigned long base) { … } /** * initio_se2_ew_ds - Disable erase/write * @base: Base address of InitIO controller * * Disable erase/write state of serial EEPROM */ void initio_se2_ew_ds(unsigned long base) { … } /** * initio_se2_rd - read E2PROM word * @base: Base of InitIO controller * @addr: Address of word in E2PROM * * Read a word from the NV E2PROM device */ static u16 initio_se2_rd(unsigned long base, u8 addr) { … } /** * initio_se2_wr - read E2PROM word * @base: Base of InitIO controller * @addr: Address of word in E2PROM * @val: Value to write * * Write a word to the NV E2PROM device. Used when recovering from * a problem with the NV. */ static void initio_se2_wr(unsigned long base, u8 addr, u16 val) { … } /** * initio_se2_rd_all - read hostadapter NV configuration * @base: Base address of InitIO controller * * Reads the E2PROM data into main memory. Ensures that the checksum * and header marker are valid. Returns 1 on success -1 on error. */ static int initio_se2_rd_all(unsigned long base) { … } /** * initio_se2_update_all - Update E2PROM * @base: Base of InitIO controller * * Update the E2PROM by wrting any changes into the E2PROM * chip, rewriting the checksum. */ static void initio_se2_update_all(unsigned long base) { … } /** * initio_read_eeprom - Retrieve configuration * @base: Base of InitIO Host Adapter * * Retrieve the host adapter configuration data from E2Prom. If the * data is invalid then the defaults are used and are also restored * into the E2PROM. This forms the access point for the SCSI driver * into the E2PROM layer, the other functions for the E2PROM are all * internal use. * * Must be called single threaded, uses a shared global area. */ static void initio_read_eeprom(unsigned long base) { … } /** * initio_stop_bm - stop bus master * @host: InitIO we are stopping * * Stop any pending DMA operation, aborting the DMA if necessary */ static void initio_stop_bm(struct initio_host * host) { … } /** * initio_reset_scsi - Reset SCSI host controller * @host: InitIO host to reset * @seconds: Recovery time * * Perform a full reset of the SCSI subsystem. */ static int initio_reset_scsi(struct initio_host * host, int seconds) { … } /** * initio_init - set up an InitIO host adapter * @host: InitIO host adapter * @bios_addr: BIOS address * * Set up the host adapter and devices according to the configuration * retrieved from the E2PROM. * * Locking: Calls E2PROM layer code which is not re-enterable so must * run single threaded for now. */ static void initio_init(struct initio_host * host, u8 *bios_addr) { … } /** * initio_alloc_scb - Allocate an SCB * @host: InitIO host we are allocating for * * Walk the SCB list for the controller and allocate a free SCB if * one exists. */ static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host) { … } /** * initio_release_scb - Release an SCB * @host: InitIO host that owns the SCB * @cmnd: SCB command block being returned * * Return an allocated SCB to the host free list */ static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd) { … } /***************************************************************************/ static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp) { … } /***************************************************************************/ static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp) { … } static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host) { … } static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb) { … } static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp) { … } /***************************************************************************/ static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host) { … } /***************************************************************************/ static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb) { … } struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun) { … } static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp) { … } struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host) { … } static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp) { … } /***************************************************************************/ static int initio_bad_seq(struct initio_host * host) { … } /************************************************************************/ static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb) { … } /***************************************************************************/ static int initio_isr(struct initio_host * host) { … } static int tulip_main(struct initio_host * host) { … } static void tulip_scsi(struct initio_host * host) { … } /** * initio_next_state - Next SCSI state * @host: InitIO host we are processing * * Progress the active command block along the state machine * until we hit a state which we must wait for activity to occur. * * Returns zero or a negative code. */ static int initio_next_state(struct initio_host * host) { … } /** * initio_state_1 - SCSI state machine * @host: InitIO host we are controlling * * Perform SCSI state processing for Select/Attention/Stop */ static int initio_state_1(struct initio_host * host) { … } /** * initio_state_2 - SCSI state machine * @host: InitIO host we are controlling * * state after selection with attention * state after selection with attention3 */ static int initio_state_2(struct initio_host * host) { … } /** * initio_state_3 - SCSI state machine * @host: InitIO host we are controlling * * state before CDB xfer is done */ static int initio_state_3(struct initio_host * host) { … } /** * initio_state_4 - SCSI state machine * @host: InitIO host we are controlling * * SCSI state machine. State 4 */ static int initio_state_4(struct initio_host * host) { … } /** * initio_state_5 - SCSI state machine * @host: InitIO host we are controlling * * State after dma xfer done or phase change before xfer done */ static int initio_state_5(struct initio_host * host) { … } /** * initio_state_6 - SCSI state machine * @host: InitIO host we are controlling * * State after Data phase */ static int initio_state_6(struct initio_host * host) { … } /** * initio_state_7 - SCSI state machine * @host: InitIO host we are controlling * */ static int initio_state_7(struct initio_host * host) { … } /** * initio_xfer_data_in - Commence data input * @host: InitIO host in use * * Commence a block of data transfer. The transfer itself will * be managed by the controller and we will get a completion (or * failure) interrupt. */ static int initio_xfer_data_in(struct initio_host * host) { … } /** * initio_xfer_data_out - Commence data output * @host: InitIO host in use * * Commence a block of data transfer. The transfer itself will * be managed by the controller and we will get a completion (or * failure) interrupt. */ static int initio_xfer_data_out(struct initio_host * host) { … } int initio_xpad_in(struct initio_host * host) { … } int initio_xpad_out(struct initio_host * host) { … } int initio_status_msg(struct initio_host * host) { … } /* scsi bus free */ int int_initio_busfree(struct initio_host * host) { … } /** * int_initio_scsi_rst - SCSI reset occurred * @host: Host seeing the reset * * A SCSI bus reset has occurred. Clean up any pending transfer * the hardware is doing by DMA and then abort all active and * disconnected commands. The mid layer should sort the rest out * for us */ static int int_initio_scsi_rst(struct initio_host * host) { … } /** * int_initio_resel - Reselection occurred * @host: InitIO host adapter * * A SCSI reselection event has been signalled and the interrupt * is now being processed. Work out which command block needs attention * and continue processing that command. */ int int_initio_resel(struct initio_host * host) { … } /** * int_initio_bad_seq - out of phase * @host: InitIO host flagging event * * We have ended up out of phase somehow. Reset the host controller * and throw all our toys out of the pram. Let the midlayer clean up */ static int int_initio_bad_seq(struct initio_host * host) { … } /** * initio_msgout_abort_targ - abort a tag * @host: InitIO host * * Abort when the target/lun does not match or when our SCB is not * busy. Used by untagged commands. */ static int initio_msgout_abort_targ(struct initio_host * host) { … } /** * initio_msgout_abort_tag - abort a tag * @host: InitIO host * * Abort when the target/lun does not match or when our SCB is not * busy. Used for tagged commands. */ static int initio_msgout_abort_tag(struct initio_host * host) { … } /** * initio_msgin - Message in * @host: InitIO Host * * Process incoming message */ static int initio_msgin(struct initio_host * host) { … } static int initio_msgout_reject(struct initio_host * host) { … } static int initio_msgout_ide(struct initio_host * host) { … } static int initio_msgin_extend(struct initio_host * host) { … } static int initio_msgin_sync(struct initio_host * host) { … } static int wdtr_done(struct initio_host * host) { … } static int initio_sync_done(struct initio_host * host) { … } static int initio_post_scsi_rst(struct initio_host * host) { … } static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb) { … } static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb) { … } static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb) { … } /** * initio_bus_device_reset - SCSI Bus Device Reset * @host: InitIO host to reset * * Perform a device reset and abort all pending SCBs for the * victim device */ int initio_bus_device_reset(struct initio_host * host) { … } static int initio_msgin_accept(struct initio_host * host) { … } static int wait_tulip(struct initio_host * host) { … } static int initio_wait_disc(struct initio_host * host) { … } static int initio_wait_done_disc(struct initio_host * host) { … } /** * i91u_intr - IRQ handler * @irqno: IRQ number * @dev_id: IRQ identifier * * Take the relevant locks and then invoke the actual isr processing * code under the lock. */ static irqreturn_t i91u_intr(int irqno, void *dev_id) { … } /** * initio_build_scb - Build the mappings and SCB * @host: InitIO host taking the command * @cblk: Firmware command block * @cmnd: SCSI midlayer command block * * Translate the abstract SCSI command into a firmware command block * suitable for feeding to the InitIO host controller. This also requires * we build the scatter gather lists and ensure they are mapped properly. */ static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * cblk, struct scsi_cmnd * cmnd) { … } /** * i91u_queuecommand_lck - Queue a new command if possible * @cmd: SCSI command block from the mid layer * * Attempts to queue a new command with the host adapter. Will return * zero if successful or indicate a host busy condition if not (which * will cause the mid layer to call us again later with the command) */ static int i91u_queuecommand_lck(struct scsi_cmnd *cmd) { … } static DEF_SCSI_QCMD(i91u_queuecommand) /** * i91u_bus_reset - reset the SCSI bus * @cmnd: Command block we want to trigger the reset for * * Initiate a SCSI bus reset sequence */ static int i91u_bus_reset(struct scsi_cmnd * cmnd) { … } /** * i91u_biosparam - return the "logical geometry * @sdev: SCSI device * @dev: Matching block device * @capacity: Sector size of drive * @info_array: Return space for BIOS geometry * * Map the device geometry in a manner compatible with the host * controller BIOS behaviour. * * FIXME: limited to 2^32 sector devices. */ static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev, sector_t capacity, int *info_array) { … } /** * i91u_unmap_scb - Unmap a command * @pci_dev: PCI device the command is for * @cmnd: The command itself * * Unmap any PCI mapping/IOMMU resources allocated when the command * was mapped originally as part of initio_build_scb */ static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd) { … } /* * i91uSCBPost - SCSI callback * * This is callback routine be called when tulip finish one * SCSI command. */ static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem) { … } static const struct scsi_host_template initio_template = …; static int initio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) { … } /** * initio_remove_one - control shutdown * @pdev: PCI device being released * * Release the resources assigned to this adapter after it has * finished being used. */ static void initio_remove_one(struct pci_dev *pdev) { … } MODULE_LICENSE(…) …; static struct pci_device_id initio_pci_tbl[] = …; MODULE_DEVICE_TABLE(pci, initio_pci_tbl); static struct pci_driver initio_pci_driver = …; module_pci_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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