Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 568 insertions, 0 deletions

diff --git a/drivers/scsi/sr_ioctl.c b/drivers/scsi/sr_ioctl.c
new file mode 100644
index 0000000..3471be0
--- /dev/null
+++ b/drivers/scsi/sr_ioctl.c
@@ -0,0 +1,568 @@
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/blkdev.h>
+#include <linux/blkpg.h>
+#include <linux/cdrom.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_dbg.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_ioctl.h>
+#include <scsi/scsi_request.h>
+
+#include "sr.h"
+
+#if 0
+#define DEBUG
+#endif
+
+/* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
+ * It is off by default and can be turned on with this module parameter */
+static int xa_test = 0;
+
+module_param(xa_test, int, S_IRUGO | S_IWUSR);
+
+
+#define IOCTL_RETRIES 3
+
+/* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command.  When these drives
+   are emulating a SCSI device via the idescsi module, they need to have
+   CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
+
+static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
+{
+	struct cdrom_tocentry trk0_te, trk1_te;
+	struct cdrom_tochdr tochdr;
+	struct packet_command cgc;
+	int ntracks, ret;
+
+	if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &tochdr)))
+		return ret;
+
+	ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
+	
+	if (ti->cdti_trk1 == ntracks) 
+		ti->cdti_trk1 = CDROM_LEADOUT;
+	else if (ti->cdti_trk1 != CDROM_LEADOUT)
+		ti->cdti_trk1 ++;
+
+	trk0_te.cdte_track = ti->cdti_trk0;
+	trk0_te.cdte_format = CDROM_MSF;
+	trk1_te.cdte_track = ti->cdti_trk1;
+	trk1_te.cdte_format = CDROM_MSF;
+	
+	if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk0_te)))
+		return ret;
+	if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk1_te)))
+		return ret;
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
+	cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
+	cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
+	cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
+	cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
+	cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
+	cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
+	cgc.data_direction = DMA_NONE;
+	cgc.timeout = IOCTL_TIMEOUT;
+	return sr_do_ioctl(cdi->handle, &cgc);
+}
+
+/* We do our own retries because we want to know what the specific
+   error code is.  Normally the UNIT_ATTENTION code will automatically
+   clear after one error */
+
+int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
+{
+	struct scsi_request *SRpnt;
+	struct scsi_device *SDev;
+        struct request *req;
+	int result, err = 0, retries = 0;
+
+	SDev = cd->device;
+	SRpnt = scsi_allocate_request(SDev, GFP_KERNEL);
+        if (!SRpnt) {
+                printk(KERN_ERR "Unable to allocate SCSI request in sr_do_ioctl");
+		err = -ENOMEM;
+		goto out;
+        }
+	SRpnt->sr_data_direction = cgc->data_direction;
+
+      retry:
+	if (!scsi_block_when_processing_errors(SDev)) {
+		err = -ENODEV;
+		goto out_free;
+	}
+
+	scsi_wait_req(SRpnt, cgc->cmd, cgc->buffer, cgc->buflen,
+		      cgc->timeout, IOCTL_RETRIES);
+
+	req = SRpnt->sr_request;
+	if (SRpnt->sr_buffer && req->buffer && SRpnt->sr_buffer != req->buffer) {
+		memcpy(req->buffer, SRpnt->sr_buffer, SRpnt->sr_bufflen);
+		kfree(SRpnt->sr_buffer);
+		SRpnt->sr_buffer = req->buffer;
+        }
+
+	result = SRpnt->sr_result;
+
+	/* Minimal error checking.  Ignore cases we know about, and report the rest. */
+	if (driver_byte(result) != 0) {
+		switch (SRpnt->sr_sense_buffer[2] & 0xf) {
+		case UNIT_ATTENTION:
+			SDev->changed = 1;
+			if (!cgc->quiet)
+				printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
+			if (retries++ < 10)
+				goto retry;
+			err = -ENOMEDIUM;
+			break;
+		case NOT_READY:	/* This happens if there is no disc in drive */
+			if (SRpnt->sr_sense_buffer[12] == 0x04 &&
+			    SRpnt->sr_sense_buffer[13] == 0x01) {
+				/* sense: Logical unit is in process of becoming ready */
+				if (!cgc->quiet)
+					printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
+				if (retries++ < 10) {
+					/* sleep 2 sec and try again */
+					ssleep(2);
+					goto retry;
+				} else {
+					/* 20 secs are enough? */
+					err = -ENOMEDIUM;
+					break;
+				}
+			}
+			if (!cgc->quiet)
+				printk(KERN_INFO "%s: CDROM not ready.  Make sure there is a disc in the drive.\n", cd->cdi.name);
+#ifdef DEBUG
+			scsi_print_req_sense("sr", SRpnt);
+#endif
+			err = -ENOMEDIUM;
+			break;
+		case ILLEGAL_REQUEST:
+			err = -EIO;
+			if (SRpnt->sr_sense_buffer[12] == 0x20 &&
+			    SRpnt->sr_sense_buffer[13] == 0x00)
+				/* sense: Invalid command operation code */
+				err = -EDRIVE_CANT_DO_THIS;
+#ifdef DEBUG
+			__scsi_print_command(cgc->cmd);
+			scsi_print_req_sense("sr", SRpnt);
+#endif
+			break;
+		default:
+			printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
+			__scsi_print_command(cgc->cmd);
+			scsi_print_req_sense("sr", SRpnt);
+			err = -EIO;
+		}
+	}
+
+	if (cgc->sense)
+		memcpy(cgc->sense, SRpnt->sr_sense_buffer, sizeof(*cgc->sense));
+
+	/* Wake up a process waiting for device */
+      out_free:
+	scsi_release_request(SRpnt);
+	SRpnt = NULL;
+      out:
+	cgc->stat = err;
+	return err;
+}
+
+/* ---------------------------------------------------------------------- */
+/* interface to cdrom.c                                                   */
+
+static int test_unit_ready(Scsi_CD *cd)
+{
+	struct packet_command cgc;
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
+	cgc.quiet = 1;
+	cgc.data_direction = DMA_NONE;
+	cgc.timeout = IOCTL_TIMEOUT;
+	return sr_do_ioctl(cd, &cgc);
+}
+
+int sr_tray_move(struct cdrom_device_info *cdi, int pos)
+{
+	Scsi_CD *cd = cdi->handle;
+	struct packet_command cgc;
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_START_STOP_UNIT;
+	cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
+	cgc.data_direction = DMA_NONE;
+	cgc.timeout = IOCTL_TIMEOUT;
+	return sr_do_ioctl(cd, &cgc);
+}
+
+int sr_lock_door(struct cdrom_device_info *cdi, int lock)
+{
+	Scsi_CD *cd = cdi->handle;
+
+	return scsi_set_medium_removal(cd->device, lock ?
+		       SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
+}
+
+int sr_drive_status(struct cdrom_device_info *cdi, int slot)
+{
+	if (CDSL_CURRENT != slot) {
+		/* we have no changer support */
+		return -EINVAL;
+	}
+	if (0 == test_unit_ready(cdi->handle))
+		return CDS_DISC_OK;
+
+	return CDS_TRAY_OPEN;
+}
+
+int sr_disk_status(struct cdrom_device_info *cdi)
+{
+	Scsi_CD *cd = cdi->handle;
+	struct cdrom_tochdr toc_h;
+	struct cdrom_tocentry toc_e;
+	int i, rc, have_datatracks = 0;
+
+	/* look for data tracks */
+	if (0 != (rc = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &toc_h)))
+		return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
+
+	for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
+		toc_e.cdte_track = i;
+		toc_e.cdte_format = CDROM_LBA;
+		if (sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &toc_e))
+			return CDS_NO_INFO;
+		if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
+			have_datatracks = 1;
+			break;
+		}
+	}
+	if (!have_datatracks)
+		return CDS_AUDIO;
+
+	if (cd->xa_flag)
+		return CDS_XA_2_1;
+	else
+		return CDS_DATA_1;
+}
+
+int sr_get_last_session(struct cdrom_device_info *cdi,
+			struct cdrom_multisession *ms_info)
+{
+	Scsi_CD *cd = cdi->handle;
+
+	ms_info->addr.lba = cd->ms_offset;
+	ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;
+
+	return 0;
+}
+
+/* primitive to determine whether we need to have GFP_DMA set based on
+ * the status of the unchecked_isa_dma flag in the host structure */
+#define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
+
+int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
+{
+	Scsi_CD *cd = cdi->handle;
+	struct packet_command cgc;
+	char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
+	int result;
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
+	cgc.cmd[2] = 0x40;	/* I do want the subchannel info */
+	cgc.cmd[3] = 0x02;	/* Give me medium catalog number info */
+	cgc.cmd[8] = 24;
+	cgc.buffer = buffer;
+	cgc.buflen = 24;
+	cgc.data_direction = DMA_FROM_DEVICE;
+	cgc.timeout = IOCTL_TIMEOUT;
+	result = sr_do_ioctl(cd, &cgc);
+
+	memcpy(mcn->medium_catalog_number, buffer + 9, 13);
+	mcn->medium_catalog_number[13] = 0;
+
+	kfree(buffer);
+	return result;
+}
+
+int sr_reset(struct cdrom_device_info *cdi)
+{
+	return 0;
+}
+
+int sr_select_speed(struct cdrom_device_info *cdi, int speed)
+{
+	Scsi_CD *cd = cdi->handle;
+	struct packet_command cgc;
+
+	if (speed == 0)
+		speed = 0xffff;	/* set to max */
+	else
+		speed *= 177;	/* Nx to kbyte/s */
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_SET_SPEED;	/* SET CD SPEED */
+	cgc.cmd[2] = (speed >> 8) & 0xff;	/* MSB for speed (in kbytes/sec) */
+	cgc.cmd[3] = speed & 0xff;	/* LSB */
+	cgc.data_direction = DMA_NONE;
+	cgc.timeout = IOCTL_TIMEOUT;
+
+	if (sr_do_ioctl(cd, &cgc))
+		return -EIO;
+	return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+/* this is called by the generic cdrom driver. arg is a _kernel_ pointer,  */
+/* because the generic cdrom driver does the user access stuff for us.     */
+/* only cdromreadtochdr and cdromreadtocentry are left - for use with the  */
+/* sr_disk_status interface for the generic cdrom driver.                  */
+
+int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
+{
+	Scsi_CD *cd = cdi->handle;
+	struct packet_command cgc;
+	int result;
+	unsigned char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
+
+	if (!buffer)
+		return -ENOMEM;
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.timeout = IOCTL_TIMEOUT;
+
+	switch (cmd) {
+	case CDROMREADTOCHDR:
+		{
+			struct cdrom_tochdr *tochdr = (struct cdrom_tochdr *) arg;
+
+			cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
+			cgc.cmd[8] = 12;		/* LSB of length */
+			cgc.buffer = buffer;
+			cgc.buflen = 12;
+			cgc.quiet = 1;
+			cgc.data_direction = DMA_FROM_DEVICE;
+
+			result = sr_do_ioctl(cd, &cgc);
+
+			tochdr->cdth_trk0 = buffer[2];
+			tochdr->cdth_trk1 = buffer[3];
+
+			break;
+		}
+
+	case CDROMREADTOCENTRY:
+		{
+			struct cdrom_tocentry *tocentry = (struct cdrom_tocentry *) arg;
+
+			cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
+			cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
+			cgc.cmd[6] = tocentry->cdte_track;
+			cgc.cmd[8] = 12;		/* LSB of length */
+			cgc.buffer = buffer;
+			cgc.buflen = 12;
+			cgc.data_direction = DMA_FROM_DEVICE;
+
+			result = sr_do_ioctl(cd, &cgc);
+
+			tocentry->cdte_ctrl = buffer[5] & 0xf;
+			tocentry->cdte_adr = buffer[5] >> 4;
+			tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
+			if (tocentry->cdte_format == CDROM_MSF) {
+				tocentry->cdte_addr.msf.minute = buffer[9];
+				tocentry->cdte_addr.msf.second = buffer[10];
+				tocentry->cdte_addr.msf.frame = buffer[11];
+			} else
+				tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
+					+ buffer[10]) << 8) + buffer[11];
+
+			break;
+		}
+
+	case CDROMPLAYTRKIND: {
+		struct cdrom_ti* ti = (struct cdrom_ti*)arg;
+
+		cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
+		cgc.cmd[4] = ti->cdti_trk0;
+		cgc.cmd[5] = ti->cdti_ind0;
+		cgc.cmd[7] = ti->cdti_trk1;
+		cgc.cmd[8] = ti->cdti_ind1;
+		cgc.data_direction = DMA_NONE;
+
+		result = sr_do_ioctl(cd, &cgc);
+		if (result == -EDRIVE_CANT_DO_THIS)
+			result = sr_fake_playtrkind(cdi, ti);
+
+		break;
+	}
+
+	default:
+		result = -EINVAL;
+	}
+
+#if 0
+	if (result)
+		printk("DEBUG: sr_audio: result for ioctl %x: %x\n", cmd, result);
+#endif
+
+	kfree(buffer);
+	return result;
+}
+
+/* -----------------------------------------------------------------------
+ * a function to read all sorts of funny cdrom sectors using the READ_CD
+ * scsi-3 mmc command
+ *
+ * lba:     linear block address
+ * format:  0 = data (anything)
+ *          1 = audio
+ *          2 = data (mode 1)
+ *          3 = data (mode 2)
+ *          4 = data (mode 2 form1)
+ *          5 = data (mode 2 form2)
+ * blksize: 2048 | 2336 | 2340 | 2352
+ */
+
+static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize)
+{
+	struct packet_command cgc;
+
+#ifdef DEBUG
+	printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
+	       cd->cdi.name, lba, format, blksize);
+#endif
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_READ_CD;	/* READ_CD */
+	cgc.cmd[1] = ((format & 7) << 2);
+	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
+	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
+	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
+	cgc.cmd[5] = (unsigned char) lba & 0xff;
+	cgc.cmd[8] = 1;
+	switch (blksize) {
+	case 2336:
+		cgc.cmd[9] = 0x58;
+		break;
+	case 2340:
+		cgc.cmd[9] = 0x78;
+		break;
+	case 2352:
+		cgc.cmd[9] = 0xf8;
+		break;
+	default:
+		cgc.cmd[9] = 0x10;
+		break;
+	}
+	cgc.buffer = dest;
+	cgc.buflen = blksize;
+	cgc.data_direction = DMA_FROM_DEVICE;
+	cgc.timeout = IOCTL_TIMEOUT;
+	return sr_do_ioctl(cd, &cgc);
+}
+
+/*
+ * read sectors with blocksizes other than 2048
+ */
+
+static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
+{
+	struct packet_command cgc;
+	int rc;
+
+	/* we try the READ CD command first... */
+	if (cd->readcd_known) {
+		rc = sr_read_cd(cd, dest, lba, 0, blksize);
+		if (-EDRIVE_CANT_DO_THIS != rc)
+			return rc;
+		cd->readcd_known = 0;
+		printk("CDROM does'nt support READ CD (0xbe) command\n");
+		/* fall & retry the other way */
+	}
+	/* ... if this fails, we switch the blocksize using MODE SELECT */
+	if (blksize != cd->device->sector_size) {
+		if (0 != (rc = sr_set_blocklength(cd, blksize)))
+			return rc;
+	}
+#ifdef DEBUG
+	printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
+#endif
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_READ_10;
+	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
+	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
+	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
+	cgc.cmd[5] = (unsigned char) lba & 0xff;
+	cgc.cmd[8] = 1;
+	cgc.buffer = dest;
+	cgc.buflen = blksize;
+	cgc.data_direction = DMA_FROM_DEVICE;
+	cgc.timeout = IOCTL_TIMEOUT;
+	rc = sr_do_ioctl(cd, &cgc);
+
+	return rc;
+}
+
+/*
+ * read a sector in raw mode to check the sector format
+ * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 
+ */
+
+int sr_is_xa(Scsi_CD *cd)
+{
+	unsigned char *raw_sector;
+	int is_xa;
+
+	if (!xa_test)
+		return 0;
+
+	raw_sector = (unsigned char *) kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
+	if (!raw_sector)
+		return -ENOMEM;
+	if (0 == sr_read_sector(cd, cd->ms_offset + 16,
+				CD_FRAMESIZE_RAW1, raw_sector)) {
+		is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
+	} else {
+		/* read a raw sector failed for some reason. */
+		is_xa = -1;
+	}
+	kfree(raw_sector);
+#ifdef DEBUG
+	printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
+#endif
+	return is_xa;
+}
+
+int sr_dev_ioctl(struct cdrom_device_info *cdi,
+		 unsigned int cmd, unsigned long arg)
+{
+	Scsi_CD *cd = cdi->handle;
+	int ret;
+	
+	ret = scsi_nonblockable_ioctl(cd->device, cmd,
+				      (void __user *)arg, NULL);
+	/*
+	 * ENODEV means that we didn't recognise the ioctl, or that we
+	 * cannot execute it in the current device state.  In either
+	 * case fall through to scsi_ioctl, which will return ENDOEV again
+	 * if it doesn't recognise the ioctl
+	 */
+	if (ret != -ENODEV)
+		return ret;
+	return scsi_ioctl(cd->device, cmd, (void __user *)arg);
+}