cregit-Linux how code gets into the kernel

Release 4.7 drivers/scsi/qlogicfas.c

Directory: drivers/scsi
/*
 * Qlogic FAS408 ISA card driver
 *
 * Copyright 1994, Tom Zerucha.   
 * tz@execpc.com
 * 
 * Redistributable under terms of the GNU General Public License
 *
 * For the avoidance of doubt the "preferred form" of this code is one which
 * is in an open non patent encumbered format. Where cryptographic key signing
 * forms part of the process of creating an executable the information
 * including keys needed to generate an equivalently functional executable
 * are deemed to be part of the source code.
 *
 * Check qlogicfas408.c for more credits and info.
 */

#include <linux/module.h>
#include <linux/blkdev.h>		/* to get disk capacity */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/proc_fs.h>
#include <linux/unistd.h>
#include <linux/spinlock.h>
#include <linux/stat.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/dma.h>

#include "scsi.h"
#include <scsi/scsi_host.h>
#include "qlogicfas408.h"

/* Set the following to 2 to use normal interrupt (active high/totempole-
 * tristate), otherwise use 0 (REQUIRED FOR PCMCIA) for active low, open
 * drain
 */

#define INT_TYPE	2


static char qlogicfas_name[] = "qlogicfas";

/*
 *      Look for qlogic card and init if found 
 */
 

static struct Scsi_Host *__qlogicfas_detect(struct scsi_host_template *host, int qbase, int qlirq) { int qltyp; /* type of chip */ int qinitid; struct Scsi_Host *hreg; /* registered host structure */ struct qlogicfas408_priv *priv; /* Qlogic Cards only exist at 0x230 or 0x330 (the chip itself * decodes the address - I check 230 first since MIDI cards are * typically at 0x330 * * Theoretically, two Qlogic cards can coexist in the same system. * This should work by simply using this as a loadable module for * the second card, but I haven't tested this. */ if (!qbase || qlirq == -1) goto err; if (!request_region(qbase, 0x10, qlogicfas_name)) { printk(KERN_INFO "%s: address %#x is busy\n", qlogicfas_name, qbase); goto err; } if (!qlogicfas408_detect(qbase, INT_TYPE)) { printk(KERN_WARNING "%s: probe failed for %#x\n", qlogicfas_name, qbase); goto err_release_mem; } printk(KERN_INFO "%s: Using preset base address of %03x," " IRQ %d\n", qlogicfas_name, qbase, qlirq); qltyp = qlogicfas408_get_chip_type(qbase, INT_TYPE); qinitid = host->this_id; if (qinitid < 0) qinitid = 7; /* if no ID, use 7 */ qlogicfas408_setup(qbase, qinitid, INT_TYPE); hreg = scsi_host_alloc(host, sizeof(struct qlogicfas408_priv)); if (!hreg) goto err_release_mem; priv = get_priv_by_host(hreg); hreg->io_port = qbase; hreg->n_io_port = 16; hreg->dma_channel = -1; if (qlirq != -1) hreg->irq = qlirq; priv->qbase = qbase; priv->qlirq = qlirq; priv->qinitid = qinitid; priv->shost = hreg; priv->int_type = INT_TYPE; sprintf(priv->qinfo, "Qlogicfas Driver version 0.46, chip %02X at %03X, IRQ %d, TPdma:%d", qltyp, qbase, qlirq, QL_TURBO_PDMA); host->name = qlogicfas_name; if (request_irq(qlirq, qlogicfas408_ihandl, 0, qlogicfas_name, hreg)) goto free_scsi_host; if (scsi_add_host(hreg, NULL)) goto free_interrupt; scsi_scan_host(hreg); return hreg; free_interrupt: free_irq(qlirq, hreg); free_scsi_host: scsi_host_put(hreg); err_release_mem: release_region(qbase, 0x10); err: return NULL; }

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aristeu sergio rozanski filhoaristeu sergio rozanski filho18656.02%642.86%
pre-gitpre-git12036.14%535.71%
linus torvaldslinus torvalds216.33%17.14%
christoph hellwigchristoph hellwig51.51%214.29%
Total332100.00%14100.00%

#define MAX_QLOGICFAS 8 static struct qlogicfas408_priv *cards; static int iobase[MAX_QLOGICFAS]; static int irq[MAX_QLOGICFAS] = { [0 ... MAX_QLOGICFAS-1] = -1 }; module_param_array(iobase, int, NULL, 0); module_param_array(irq, int, NULL, 0); MODULE_PARM_DESC(iobase, "I/O address"); MODULE_PARM_DESC(irq, "IRQ");
static int qlogicfas_detect(struct scsi_host_template *sht) { struct Scsi_Host *shost; struct qlogicfas408_priv *priv; int num; for (num = 0; num < MAX_QLOGICFAS; num++) { shost = __qlogicfas_detect(sht, iobase[num], irq[num]); if (shost == NULL) { /* no more devices */ break; } priv = get_priv_by_host(shost); priv->next = cards; cards = priv; } return num; }

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aristeu sergio rozanski filhoaristeu sergio rozanski filho7081.40%450.00%
christoph hellwigchristoph hellwig1416.28%225.00%
pre-gitpre-git11.16%112.50%
linus torvaldslinus torvalds11.16%112.50%
Total86100.00%8100.00%


static int qlogicfas_release(struct Scsi_Host *shost) { struct qlogicfas408_priv *priv = get_priv_by_host(shost); scsi_remove_host(shost); if (shost->irq) { qlogicfas408_disable_ints(priv); free_irq(shost->irq, shost); } if (shost->io_port && shost->n_io_port) release_region(shost->io_port, shost->n_io_port); scsi_host_put(shost); return 0; }

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christoph hellwigchristoph hellwig5368.83%116.67%
aristeu sergio rozanski filhoaristeu sergio rozanski filho1924.68%466.67%
matthew wilcoxmatthew wilcox56.49%116.67%
Total77100.00%6100.00%

/* * The driver template is also needed for PCMCIA */ static struct scsi_host_template qlogicfas_driver_template = { .module = THIS_MODULE, .name = qlogicfas_name, .proc_name = qlogicfas_name, .info = qlogicfas408_info, .queuecommand = qlogicfas408_queuecommand, .eh_abort_handler = qlogicfas408_abort, .eh_bus_reset_handler = qlogicfas408_bus_reset, .bios_param = qlogicfas408_biosparam, .can_queue = 1, .this_id = -1, .sg_tablesize = SG_ALL, .use_clustering = DISABLE_CLUSTERING, };
static __init int qlogicfas_init(void) { if (!qlogicfas_detect(&qlogicfas_driver_template)) { /* no cards found */ printk(KERN_INFO "%s: no cards were found, please specify " "I/O address and IRQ using iobase= and irq= " "options", qlogicfas_name); return -ENODEV; } return 0; }

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aristeu sergio rozanski filhoaristeu sergio rozanski filho38100.00%2100.00%
Total38100.00%2100.00%


static __exit void qlogicfas_exit(void) { struct qlogicfas408_priv *priv; for (priv = cards; priv != NULL; priv = priv->next) qlogicfas_release(priv->shost); }

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aristeu sergio rozanski filhoaristeu sergio rozanski filho37100.00%2100.00%
Total37100.00%2100.00%

MODULE_AUTHOR("Tom Zerucha, Michael Griffith"); MODULE_DESCRIPTION("Driver for the Qlogic FAS408 based ISA card"); MODULE_LICENSE("GPL"); module_init(qlogicfas_init); module_exit(qlogicfas_exit);

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aristeu sergio rozanski filhoaristeu sergio rozanski filho46257.53%1031.25%
pre-gitpre-git15819.68%1031.25%
christoph hellwigchristoph hellwig12916.06%412.50%
linus torvaldslinus torvalds253.11%13.12%
andrew mortonandrew morton121.49%13.12%
alan coxalan cox50.62%26.25%
arnaldo carvalho de meloarnaldo carvalho de melo50.62%13.12%
matthew wilcoxmatthew wilcox50.62%13.12%
arjan van de venarjan van de ven10.12%13.12%
adrian bunkadrian bunk10.12%13.12%
Total803100.00%32100.00%
Directory: drivers/scsi
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