cregit-Linux how code gets into the kernel

Release 4.7 drivers/scsi/g_NCR5380.c

Directory: drivers/scsi
/*
 * Generic Generic NCR5380 driver
 *      
 * Copyright 1993, Drew Eckhardt
 *      Visionary Computing
 *      (Unix and Linux consulting and custom programming)
 *      drew@colorado.edu
 *      +1 (303) 440-4894
 *
 * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
 *    K.Lentin@cs.monash.edu.au
 *
 * NCR53C400A extensions (c) 1996, Ingmar Baumgart
 *    ingmar@gonzo.schwaben.de
 *
 * DTC3181E extensions (c) 1997, Ronald van Cuijlenborg
 * ronald.van.cuijlenborg@tip.nl or nutty@dds.nl
 *
 * Added ISAPNP support for DTC436 adapters,
 * Thomas Sailer, sailer@ife.ee.ethz.ch
 *
 * See Documentation/scsi/g_NCR5380.txt for more info.
 */

#include <asm/io.h>
#include <linux/blkdev.h>
#include <linux/module.h>
#include <scsi/scsi_host.h>
#include "g_NCR5380.h"
#include "NCR5380.h"
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/isapnp.h>
#include <linux/interrupt.h>


static int ncr_irq;

static int ncr_dma;

static int ncr_addr;

static int ncr_5380;

static int ncr_53c400;

static int ncr_53c400a;

static int dtc_3181e;

static int hp_c2502;


static struct override {
	
NCR5380_map_type NCR5380_map_name;
	
int irq;
	
int dma;
	
int board;		/* Use NCR53c400, Ricoh, etc. extensions ? */
} overrides
#ifdef GENERIC_NCR5380_OVERRIDE

[] __initdata = GENERIC_NCR5380_OVERRIDE;
#else
[1] __initdata = { { 0,},};
#endif


#define NO_OVERRIDES ARRAY_SIZE(overrides)

#ifndef MODULE

/**
 *      internal_setup          -       handle lilo command string override
 *      @board: BOARD_* identifier for the board
 *      @str: unused
 *      @ints: numeric parameters
 *
 *      Do LILO command line initialization of the overrides array. Display
 *      errors when needed
 *
 *      Locks: none
 */


static void __init internal_setup(int board, char *str, int *ints) { static int commandline_current; switch (board) { case BOARD_NCR5380: if (ints[0] != 2 && ints[0] != 3) { printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n"); return; } break; case BOARD_NCR53C400: if (ints[0] != 2) { printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n"); return; } break; case BOARD_NCR53C400A: if (ints[0] != 2) { printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n"); return; } break; case BOARD_DTC3181E: if (ints[0] != 2) { printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n"); return; } break; } if (commandline_current < NO_OVERRIDES) { overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1]; overrides[commandline_current].irq = ints[2]; if (ints[0] == 3) overrides[commandline_current].dma = ints[3]; else overrides[commandline_current].dma = DMA_NONE; overrides[commandline_current].board = board; ++commandline_current; } }

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/** * do_NCR53C80_setup - set up entry point * @str: unused * * Setup function invoked at boot to parse the ncr5380= command * line. */
static int __init do_NCR5380_setup(char *str) { int ints[10]; get_options(str, ARRAY_SIZE(ints), ints); internal_setup(BOARD_NCR5380, str, ints); return 1; }

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Total41100.00%4100.00%

/** * do_NCR53C400_setup - set up entry point * @str: unused * @ints: integer parameters from kernel setup code * * Setup function invoked at boot to parse the ncr53c400= command * line. */
static int __init do_NCR53C400_setup(char *str) { int ints[10]; get_options(str, ARRAY_SIZE(ints), ints); internal_setup(BOARD_NCR53C400, str, ints); return 1; }

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/** * do_NCR53C400A_setup - set up entry point * @str: unused * @ints: integer parameters from kernel setup code * * Setup function invoked at boot to parse the ncr53c400a= command * line. */
static int __init do_NCR53C400A_setup(char *str) { int ints[10]; get_options(str, ARRAY_SIZE(ints), ints); internal_setup(BOARD_NCR53C400A, str, ints); return 1; }

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Total41100.00%3100.00%

/** * do_DTC3181E_setup - set up entry point * @str: unused * @ints: integer parameters from kernel setup code * * Setup function invoked at boot to parse the dtc3181e= command * line. */
static int __init do_DTC3181E_setup(char *str) { int ints[10]; get_options(str, ARRAY_SIZE(ints), ints); internal_setup(BOARD_DTC3181E, str, ints); return 1; }

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Total41100.00%3100.00%

#endif #ifndef SCSI_G_NCR5380_MEM /* * Configure I/O address of 53C400A or DTC436 by writing magic numbers * to ports 0x779 and 0x379. */
static void magic_configure(int idx, u8 irq, u8 magic[]) { u8 cfg = 0; outb(magic[0], 0x779); outb(magic[1], 0x379); outb(magic[2], 0x379); outb(magic[3], 0x379); outb(magic[4], 0x379); /* allowed IRQs for HP C2502 */ if (irq != 2 && irq != 3 && irq != 4 && irq != 5 && irq != 7) irq = 0; if (idx >= 0 && idx <= 7) cfg = 0x80 | idx | (irq << 4); outb(cfg, 0x379); }

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#endif /** * generic_NCR5380_detect - look for NCR5380 controllers * @tpnt: the scsi template * * Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E * and DTC436(ISAPnP) controllers. If overrides have been set we use * them. * * Locks: none */
static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt) { static int current_override; int count; unsigned int *ports; u8 *magic = NULL; #ifndef SCSI_G_NCR5380_MEM int i; int port_idx = -1; unsigned long region_size; #endif static unsigned int __initdata ncr_53c400a_ports[] = { 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0 }; static unsigned int __initdata dtc_3181e_ports[] = { 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0 }; static u8 ncr_53c400a_magic[] __initdata = { /* 53C400A & DTC436 */ 0x59, 0xb9, 0xc5, 0xae, 0xa6 }; static u8 hp_c2502_magic[] __initdata = { /* HP C2502 */ 0x0f, 0x22, 0xf0, 0x20, 0x80 }; int flags; struct Scsi_Host *instance; struct NCR5380_hostdata *hostdata; #ifdef SCSI_G_NCR5380_MEM unsigned long base; void __iomem *iomem; resource_size_t iomem_size; #endif if (ncr_irq) overrides[0].irq = ncr_irq; if (ncr_dma) overrides[0].dma = ncr_dma; if (ncr_addr) overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr; if (ncr_5380) overrides[0].board = BOARD_NCR5380; else if (ncr_53c400) overrides[0].board = BOARD_NCR53C400; else if (ncr_53c400a) overrides[0].board = BOARD_NCR53C400A; else if (dtc_3181e) overrides[0].board = BOARD_DTC3181E; else if (hp_c2502) overrides[0].board = BOARD_HP_C2502; #ifndef SCSI_G_NCR5380_MEM if (!current_override && isapnp_present()) { struct pnp_dev *dev = NULL; count = 0; while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) { if (count >= NO_OVERRIDES) break; if (pnp_device_attach(dev) < 0) continue; if (pnp_activate_dev(dev) < 0) { printk(KERN_ERR "dtc436e probe: activate failed\n"); pnp_device_detach(dev); continue; } if (!pnp_port_valid(dev, 0)) { printk(KERN_ERR "dtc436e probe: no valid port\n"); pnp_device_detach(dev); continue; } if (pnp_irq_valid(dev, 0)) overrides[count].irq = pnp_irq(dev, 0); else overrides[count].irq = NO_IRQ; if (pnp_dma_valid(dev, 0)) overrides[count].dma = pnp_dma(dev, 0); else overrides[count].dma = DMA_NONE; overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0); overrides[count].board = BOARD_DTC3181E; count++; } } #endif for (count = 0; current_override < NO_OVERRIDES; ++current_override) { if (!(overrides[current_override].NCR5380_map_name)) continue; ports = NULL; flags = 0; switch (overrides[current_override].board) { case BOARD_NCR5380: flags = FLAG_NO_PSEUDO_DMA | FLAG_DMA_FIXUP; break; case BOARD_NCR53C400A: ports = ncr_53c400a_ports; magic = ncr_53c400a_magic; break; case BOARD_HP_C2502: ports = ncr_53c400a_ports; magic = hp_c2502_magic; break; case BOARD_DTC3181E: ports = dtc_3181e_ports; magic = ncr_53c400a_magic; break; } #ifndef SCSI_G_NCR5380_MEM if (ports && magic) { /* wakeup sequence for the NCR53C400A and DTC3181E */ /* Disable the adapter and look for a free io port */ magic_configure(-1, 0, magic); region_size = 16; if (overrides[current_override].NCR5380_map_name != PORT_AUTO) for (i = 0; ports[i]; i++) { if (!request_region(ports[i], region_size, "ncr53c80")) continue; if (overrides[current_override].NCR5380_map_name == ports[i]) break; release_region(ports[i], region_size); } else for (i = 0; ports[i]; i++) { if (!request_region(ports[i], region_size, "ncr53c80")) continue; if (inb(ports[i]) == 0xff) break; release_region(ports[i], region_size); } if (ports[i]) { /* At this point we have our region reserved */ magic_configure(i, 0, magic); /* no IRQ yet */ outb(0xc0, ports[i] + 9); if (inb(ports[i] + 9) != 0x80) continue; overrides[current_override].NCR5380_map_name = ports[i]; port_idx = i; } else continue; } else { /* Not a 53C400A style setup - just grab */ region_size = 8; if (!request_region(overrides[current_override].NCR5380_map_name, region_size, "ncr5380")) continue; } #else base = overrides[current_override].NCR5380_map_name; iomem_size = NCR53C400_region_size; if (!request_mem_region(base, iomem_size, "ncr5380")) continue; iomem = ioremap(base, iomem_size); if (!iomem) { release_mem_region(base, iomem_size); continue; } #endif instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata)); if (instance == NULL) goto out_release; hostdata = shost_priv(instance); #ifndef SCSI_G_NCR5380_MEM instance->io_port = overrides[current_override].NCR5380_map_name; instance->n_io_port = region_size; hostdata->io_width = 1; /* 8-bit PDMA by default */ /* * On NCR53C400 boards, NCR5380 registers are mapped 8 past * the base address. */ switch (overrides[current_override].board) { case BOARD_NCR53C400: instance->io_port += 8; hostdata->c400_ctl_status = 0; hostdata->c400_blk_cnt = 1; hostdata->c400_host_buf = 4; break; case BOARD_DTC3181E: hostdata->io_width = 2; /* 16-bit PDMA */ /* fall through */ case BOARD_NCR53C400A: case BOARD_HP_C2502: hostdata->c400_ctl_status = 9; hostdata->c400_blk_cnt = 10; hostdata->c400_host_buf = 8; break; } #else instance->base = overrides[current_override].NCR5380_map_name; hostdata->iomem = iomem; hostdata->iomem_size = iomem_size; switch (overrides[current_override].board) { case BOARD_NCR53C400: hostdata->c400_ctl_status = 0x100; hostdata->c400_blk_cnt = 0x101; hostdata->c400_host_buf = 0x104; break; case BOARD_DTC3181E: case BOARD_NCR53C400A: case BOARD_HP_C2502: pr_err(DRV_MODULE_NAME ": unknown register offsets\n"); goto out_unregister; } #endif if (NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP)) goto out_unregister; switch (overrides[current_override].board) { case BOARD_NCR53C400: case BOARD_DTC3181E: case BOARD_NCR53C400A: case BOARD_HP_C2502: NCR5380_write(hostdata->c400_ctl_status, CSR_BASE); } NCR5380_maybe_reset_bus(instance); if (overrides[current_override].irq != IRQ_AUTO) instance->irq = overrides[current_override].irq; else instance->irq = NCR5380_probe_irq(instance, 0xffff); /* Compatibility with documented NCR5380 kernel parameters */ if (instance->irq == 255) instance->irq = NO_IRQ; if (instance->irq != NO_IRQ) { #ifndef SCSI_G_NCR5380_MEM /* set IRQ for HP C2502 */ if (overrides[current_override].board == BOARD_HP_C2502) magic_configure(port_idx, instance->irq, magic); #endif if (request_irq(instance->irq, generic_NCR5380_intr, 0, "NCR5380", instance)) { printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq); instance->irq = NO_IRQ; } } if (instance->irq == NO_IRQ) { printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); } ++current_override; ++count; } return count; out_unregister: scsi_unregister(instance); out_release: #ifndef SCSI_G_NCR5380_MEM release_region(overrides[current_override].NCR5380_map_name, region_size); #else iounmap(iomem); release_mem_region(base, iomem_size); #endif return count; }

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al viroal viro523.84%25.56%
jaroslav kyselajaroslav kysela493.62%12.78%
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michael opdenackermichael opdenacker10.07%12.78%
Total1353100.00%36100.00%

/** * generic_NCR5380_release_resources - free resources * @instance: host adapter to clean up * * Free the generic interface resources from this adapter. * * Locks: none */
static int generic_NCR5380_release_resources(struct Scsi_Host *instance) { if (instance->irq != NO_IRQ) free_irq(instance->irq, instance); NCR5380_exit(instance); #ifndef SCSI_G_NCR5380_MEM release_region(instance->io_port, instance->n_io_port); #else { struct NCR5380_hostdata *hostdata = shost_priv(instance); iounmap(hostdata->iomem); release_mem_region(instance->base, hostdata->iomem_size); } #endif return 0; }

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alan coxalan cox22.38%17.69%
jeff garzikjeff garzik11.19%17.69%
Total84100.00%13100.00%

/** * generic_NCR5380_pread - pseudo DMA read * @instance: adapter to read from * @dst: buffer to read into * @len: buffer length * * Perform a pseudo DMA mode read from an NCR53C400 or equivalent * controller */
static inline int generic_NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len) { struct NCR5380_hostdata *hostdata = shost_priv(instance); int blocks = len / 128; int start = 0; NCR5380_write(hostdata->c400_ctl_status, CSR_BASE | CSR_TRANS_DIR); NCR5380_write(hostdata->c400_blk_cnt, blocks); while (1) { if (NCR5380_read(hostdata->c400_blk_cnt) == 0) break; if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) { printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks); return -1; } while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) ; /* FIXME - no timeout */ #ifndef SCSI_G_NCR5380_MEM if (hostdata->io_width == 2) insw(instance->io_port + hostdata->c400_host_buf, dst + start, 64); else insb(instance->io_port + hostdata->c400_host_buf, dst + start, 128); #else /* implies SCSI_G_NCR5380_MEM */ memcpy_fromio(dst + start, hostdata->iomem + NCR53C400_host_buffer, 128); #endif start += 128; blocks--; } if (blocks) { while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) ; /* FIXME - no timeout */ #ifndef SCSI_G_NCR5380_MEM if (hostdata->io_width == 2) insw(instance->io_port + hostdata->c400_host_buf, dst + start, 64); else insb(instance->io_port + hostdata->c400_host_buf, dst + start, 128); #else /* implies SCSI_G_NCR5380_MEM */ memcpy_fromio(dst + start, hostdata->iomem + NCR53C400_host_buffer, 128); #endif start += 128; blocks--; } if (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ)) printk("53C400r: no 53C80 gated irq after transfer"); /* wait for 53C80 registers to be available */ while (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG)) ; if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) printk(KERN_ERR "53C400r: no end dma signal\n"); return 0; }

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Total341100.00%12100.00%

/** * generic_NCR5380_pwrite - pseudo DMA write * @instance: adapter to read from * @dst: buffer to read into * @len: buffer length * * Perform a pseudo DMA mode read from an NCR53C400 or equivalent * controller */
static inline int generic_NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len) { struct NCR5380_hostdata *hostdata = shost_priv(instance); int blocks = len / 128; int start = 0; NCR5380_write(hostdata->c400_ctl_status, CSR_BASE); NCR5380_write(hostdata->c400_blk_cnt, blocks); while (1) { if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) { printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks); return -1; } if (NCR5380_read(hostdata->c400_blk_cnt) == 0) break; while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) ; // FIXME - timeout #ifndef SCSI_G_NCR5380_MEM if (hostdata->io_width == 2) outsw(instance->io_port + hostdata->c400_host_buf, src + start, 64); else outsb(instance->io_port + hostdata->c400_host_buf, src + start, 128); #else /* implies SCSI_G_NCR5380_MEM */ memcpy_toio(hostdata->iomem + NCR53C400_host_buffer, src + start, 128); #endif start += 128; blocks--; } if (blocks) { while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) ; // FIXME - no timeout #ifndef SCSI_G_NCR5380_MEM if (hostdata->io_width == 2) outsw(instance->io_port + hostdata->c400_host_buf, src + start, 64); else outsb(instance->io_port + hostdata->c400_host_buf, src + start, 128); #else /* implies SCSI_G_NCR5380_MEM */ memcpy_toio(hostdata->iomem + NCR53C400_host_buffer, src + start, 128); #endif start += 128; blocks--; } /* wait for 53C80 registers to be available */ while (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG)) { udelay(4); /* DTC436 chip hangs without this */ /* FIXME - no timeout */ } if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) { printk(KERN_ERR "53C400w: no end dma signal\n"); } while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT)) ; // TIMEOUT return 0; }

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dave jonesdave jones51.45%110.00%
alan coxalan cox41.16%110.00%
Total344100.00%10100.00%


static int generic_NCR5380_dma_xfer_len(struct Scsi_Host *instance, struct scsi_cmnd *cmd) { struct NCR5380_hostdata *hostdata = shost_priv(instance); int transfersize = cmd->transfersize; if (hostdata->flags & FLAG_NO_PSEUDO_DMA) return 0; /* Limit transfers to 32K, for xx400 & xx406 * pseudoDMA that transfers in 128 bytes blocks. */ if (transfersize > 32 * 1024 && cmd->SCp.this_residual && !(cmd->SCp.this_residual % transfersize)) transfersize = 32 * 1024; /* 53C400 datasheet: non-modulo-128-byte transfers should use PIO */ if (transfersize % 128) transfersize = 0; return transfersize; }

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/* * Include the NCR5380 core code that we build our driver around */ #include "NCR5380.c" static struct scsi_host_template driver_template = { .proc_name = DRV_MODULE_NAME, .name = "Generic NCR5380/NCR53C400 SCSI", .detect = generic_NCR5380_detect, .release = generic_NCR5380_release_resources, .info = generic_NCR5380_info, .queuecommand = generic_NCR5380_queue_command, .eh_abort_handler = generic_NCR5380_abort, .eh_bus_reset_handler = generic_NCR5380_bus_reset, .can_queue = 16, .this_id = 7, .sg_tablesize = SG_ALL, .cmd_per_lun = 2, .use_clustering = DISABLE_CLUSTERING, .cmd_size = NCR5380_CMD_SIZE, .max_sectors = 128, }; #include "scsi_module.c" module_param(ncr_irq, int, 0); module_param(ncr_dma, int, 0); module_param(ncr_addr, int, 0); module_param(ncr_5380, int, 0); module_param(ncr_53c400, int, 0); module_param(ncr_53c400a, int, 0); module_param(dtc_3181e, int, 0); module_param(hp_c2502, int, 0); MODULE_LICENSE("GPL"); #if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE) static struct isapnp_device_id id_table[] = { { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), 0}, {0} }; MODULE_DEVICE_TABLE(isapnp, id_table); #endif __setup("ncr5380=", do_NCR5380_setup); __setup("ncr53c400=", do_NCR53C400_setup); __setup("ncr53c400a=", do_NCR53C400A_setup); __setup("dtc3181e=", do_DTC3181E_setup);

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finn thainfinn thain31010.00%1928.79%
dave jonesdave jones1464.71%11.52%
al viroal viro732.35%23.03%
alan coxalan cox722.32%23.03%
christoph hellwigchristoph hellwig632.03%34.55%
linus torvaldslinus torvalds521.68%23.03%
jaroslav kyselajaroslav kysela491.58%11.52%
james bottomleyjames bottomley351.13%23.03%
andrew mortonandrew morton290.94%23.03%
geert uytterhoevengeert uytterhoeven110.35%11.52%
tobias klausertobias klauser80.26%11.52%
michael opdenackermichael opdenacker10.03%11.52%
arjan van de venarjan van de ven10.03%11.52%
jeff garzikjeff garzik10.03%11.52%
greg kroah-hartmangreg kroah-hartman0.00%00.00%
Total3101100.00%66100.00%
Directory: drivers/scsi
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