From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761477AbYCAJIs (ORCPT ); Sat, 1 Mar 2008 04:08:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758747AbYCAI7t (ORCPT ); Sat, 1 Mar 2008 03:59:49 -0500 Received: from fk-out-0910.google.com ([209.85.128.190]:13216 "EHLO fk-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756831AbYCAI71 (ORCPT ); Sat, 1 Mar 2008 03:59:27 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=to:cc:subject:date:message-id:x-mailer:in-reply-to:references:from; b=B44xsRfDG+rxzeDQJkhcOukClGpII0QS81tlfMKxY5tYKcOvBRqBSzPgkKcw96R1cF8oZpIv9PCfG9OUBz+q/dXARvkmizRP46BUKqVqLcq1UnaLSUEAEJWgEgF6t93YcOfdW8DSl/pK7K2BzUREz/36Y6bM2zBNMDDPXxBxFxg= To: Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org, Borislav Petkov Subject: [PATCH 21/24] ide-tape: remove pipeline-specific members from struct ide_tape_obj Date: Sat, 1 Mar 2008 09:58:45 +0100 Message-Id: <1204361928-30229-22-git-send-email-petkovbb@gmail.com> X-Mailer: git-send-email 1.5.4.1 In-Reply-To: <1204361928-30229-1-git-send-email-petkovbb@gmail.com> References: <1204361928-30229-1-git-send-email-petkovbb@gmail.com> From: Borislav Petkov Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Most of them have become unused after removing the pipelined functionality - the rest is only being written to. Signed-off-by: Borislav Petkov --- drivers/ide/ide-tape.c | 95 +----------------------------------------------- 1 files changed, 2 insertions(+), 93 deletions(-) diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c index 68c9c09..9810253 100644 --- a/drivers/ide/ide-tape.c +++ b/drivers/ide/ide-tape.c @@ -323,26 +323,6 @@ typedef struct ide_tape_obj { char *b_data; int b_count; - /* - * Pipeline parameters. - * - * To accomplish non-pipelined mode, we simply set the following - * variables to zero (or NULL, where appropriate). - */ - /* Number of currently used stages */ - int nr_stages; - /* Number of pending stages */ - int nr_pending_stages; - /* We will not allocate more than this number of stages */ - int max_stages, min_pipeline, max_pipeline; - /* The first stage which will be removed from the pipeline */ - idetape_stage_t *first_stage; - /* The currently active stage */ - idetape_stage_t *active_stage; - /* Will be serviced after the currently active request */ - idetape_stage_t *next_stage; - /* New requests will be added to the pipeline here */ - idetape_stage_t *last_stage; /* Optional free stage which we can use */ int pages_per_stage; /* Wasted space in each stage */ @@ -365,43 +345,8 @@ typedef struct ide_tape_obj { /* the tape is write protected (hardware or opened as read-only) */ char write_prot; - /* - * Limit the number of times a request can be postponed, to avoid an - * infinite postpone deadlock. - */ - int postpone_cnt; - - /* - * Measures number of frames: - * - * 1. written/read to/from the driver pipeline (pipeline_head). - * 2. written/read to/from the tape buffers (idetape_bh). - * 3. written/read by the tape to/from the media (tape_head). - */ - int pipeline_head; - int buffer_head; - int tape_head; - int last_tape_head; - - /* Speed control at the tape buffers input/output */ - unsigned long insert_time; + /* size control at the tape buffers input/output */ int insert_size; - int insert_speed; - int max_insert_speed; - int measure_insert_time; - - /* Speed regulation negative feedback loop */ - int speed_control; - int pipeline_head_speed; - int controlled_pipeline_head_speed; - int uncontrolled_pipeline_head_speed; - int controlled_last_pipeline_head; - unsigned long uncontrolled_pipeline_head_time; - unsigned long controlled_pipeline_head_time; - int controlled_previous_pipeline_head; - int uncontrolled_previous_pipeline_head; - unsigned long controlled_previous_head_time; - unsigned long uncontrolled_previous_head_time; u32 debug_mask; } idetape_tape_t; @@ -1200,15 +1145,8 @@ static ide_startstop_t idetape_rw_callback(ide_drive_t *drive) tape->avg_size += blocks * tape->blk_size; tape->insert_size += blocks * tape->blk_size; if (tape->insert_size > 1024 * 1024) - tape->measure_insert_time = 1; - if (tape->measure_insert_time) { - tape->measure_insert_time = 0; - tape->insert_time = jiffies; tape->insert_size = 0; - } - if (time_after(jiffies, tape->insert_time)) - tape->insert_speed = tape->insert_size / 1024 * HZ / - (jiffies - tape->insert_time); + if (time_after_eq(jiffies, tape->avg_time + HZ)) { tape->avg_speed = tape->avg_size * HZ / (jiffies - tape->avg_time) / 1024; @@ -1313,9 +1251,6 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive, drive->post_reset = 0; } - if (time_after(jiffies, tape->insert_time)) - tape->insert_speed = tape->insert_size / 1024 * HZ / - (jiffies - tape->insert_time); if (!test_and_clear_bit(IDETAPE_FLAG_IGNORE_DSC, &tape->flags) && (stat & SEEK_STAT) == 0) { if (postponed_rq == NULL) { @@ -1339,16 +1274,12 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive, return ide_stopped; } if (rq->cmd[0] & REQ_IDETAPE_READ) { - tape->buffer_head++; - tape->postpone_cnt = 0; pc = idetape_next_pc_storage(drive); idetape_create_read_cmd(tape, pc, rq->current_nr_sectors, (struct idetape_bh *)rq->special); goto out; } if (rq->cmd[0] & REQ_IDETAPE_WRITE) { - tape->buffer_head++; - tape->postpone_cnt = 0; pc = idetape_next_pc_storage(drive); idetape_create_write_cmd(tape, pc, rq->current_nr_sectors, (struct idetape_bh *)rq->special); @@ -2628,18 +2559,6 @@ static void idetape_add_settings(ide_drive_t *drive) ide_add_setting(drive, "buffer", SETTING_READ, TYPE_SHORT, 0, 0xffff, 1, 2, (u16 *)&tape->caps[16], NULL); - ide_add_setting(drive, "pipeline_min", SETTING_RW, TYPE_INT, 1, 0xffff, - tape->stage_size / 1024, 1, &tape->min_pipeline, NULL); - ide_add_setting(drive, "pipeline", SETTING_RW, TYPE_INT, 1, 0xffff, - tape->stage_size / 1024, 1, &tape->max_stages, NULL); - ide_add_setting(drive, "pipeline_max", SETTING_RW, TYPE_INT, 1, 0xffff, - tape->stage_size / 1024, 1, &tape->max_pipeline, NULL); - ide_add_setting(drive, "pipeline_used", SETTING_READ, TYPE_INT, 0, - 0xffff, tape->stage_size / 1024, 1, &tape->nr_stages, - NULL); - ide_add_setting(drive, "pipeline_pending", SETTING_READ, TYPE_INT, 0, - 0xffff, tape->stage_size / 1024, 1, - &tape->nr_pending_stages, NULL); ide_add_setting(drive, "speed", SETTING_READ, TYPE_SHORT, 0, 0xffff, 1, 1, (u16 *)&tape->caps[14], NULL); ide_add_setting(drive, "stage", SETTING_READ, TYPE_INT, 0, 0xffff, 1, @@ -2649,12 +2568,6 @@ static void idetape_add_settings(ide_drive_t *drive) NULL); ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->dsc_overlap, NULL); - ide_add_setting(drive, "pipeline_head_speed_c", SETTING_READ, TYPE_INT, - 0, 0xffff, 1, 1, &tape->controlled_pipeline_head_speed, - NULL); - ide_add_setting(drive, "pipeline_head_speed_u", SETTING_READ, TYPE_INT, - 0, 0xffff, 1, 1, - &tape->uncontrolled_pipeline_head_speed, NULL); ide_add_setting(drive, "avg_speed", SETTING_READ, TYPE_INT, 0, 0xffff, 1, 1, &tape->avg_speed, NULL); ide_add_setting(drive, "debug_mask", SETTING_RW, TYPE_INT, 0, 0xffff, 1, @@ -2699,8 +2612,6 @@ static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor) tape->name[2] = '0' + minor; tape->chrdev_dir = IDETAPE_DIR_NONE; tape->pc = tape->pc_stack; - tape->max_insert_speed = 10000; - tape->speed_control = 1; *((unsigned short *) &gcw) = drive->id->config; /* Command packet DRQ type */ @@ -2764,8 +2675,6 @@ static void ide_tape_release(struct kref *kref) ide_drive_t *drive = tape->drive; struct gendisk *g = tape->disk; - BUG_ON(tape->first_stage != NULL || tape->merge_stage_size); - drive->dsc_overlap = 0; drive->driver_data = NULL; device_destroy(idetape_sysfs_class, MKDEV(IDETAPE_MAJOR, tape->minor)); -- 1.5.4.1