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Subject[patch 6/7] ps3: ROM Storage Driver
Add a CD/DVD/BD Storage Driver for the PS3:
- Implemented as a SCSI device driver
- Uses software scatter-gather with a 64 KiB bounce buffer as the hypervisor
doesn't support scatter-gather

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
---
arch/powerpc/platforms/ps3/Kconfig | 11
drivers/scsi/Makefile | 1
drivers/scsi/ps3rom.c | 816 +++++++++++++++++++++++++++++++++++++
3 files changed, 828 insertions(+)
--- a/arch/powerpc/platforms/ps3/Kconfig
+++ b/arch/powerpc/platforms/ps3/Kconfig
@@ -112,4 +112,15 @@ config PS3_DISK
This support is required to access the PS3 hard disk.
In general, all users will say Y or M.

+config PS3_ROM
+ tristate "PS3 ROM Storage Driver"
+ depends on PPC_PS3 && BLK_DEV_SR
+ select PS3_STORAGE
+ default y
+ help
+ Include support for the PS3 ROM Storage.
+
+ This support is required to access the PS3 BD/DVD/CD-ROM drive.
+ In general, all users will say Y or M.
+
endmenu
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -133,6 +133,7 @@ obj-$(CONFIG_SCSI_IBMVSCSI) += ibmvscsi/
obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvscsi/
obj-$(CONFIG_SCSI_HPTIOP) += hptiop.o
obj-$(CONFIG_SCSI_STEX) += stex.o
+obj-$(CONFIG_PS3_ROM) += ps3rom.o

obj-$(CONFIG_ARM) += arm/

--- /dev/null
+++ b/drivers/scsi/ps3rom.c
@@ -0,0 +1,816 @@
+/*
+ * PS3 ROM Storage Driver
+ *
+ * Copyright (C) 2007 Sony Computer Entertainment Inc.
+ * Copyright 2007 Sony Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <linux/cdrom.h>
+#include <linux/interrupt.h>
+#include <linux/kthread.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+
+#include <asm/ps3stor.h>
+
+
+#define DEVICE_NAME "ps3rom"
+
+#define BOUNCE_SIZE (64*1024)
+
+#define PS3ROM_MAX_SECTORS (BOUNCE_SIZE / CD_FRAMESIZE)
+
+#define LV1_STORAGE_SEND_ATAPI_COMMAND (1)
+
+
+struct ps3rom_private {
+ spinlock_t lock;
+ struct task_struct *thread;
+ struct Scsi_Host *host;
+ struct scsi_cmnd *cmd;
+ void (*scsi_done)(struct scsi_cmnd *);
+};
+#define ps3rom_priv(dev) ((dev)->sbd.core.driver_data)
+
+struct lv1_atapi_cmnd_block {
+ u8 pkt[32]; /* packet command block */
+ u32 pktlen; /* should be 12 for ATAPI 8020 */
+ u32 blocks;
+ u32 block_size;
+ u32 proto; /* transfer mode */
+ u32 in_out; /* transfer direction */
+ u64 buffer; /* parameter except command block */
+ u32 arglen; /* length above */
+};
+
+/*
+ * to position parameter
+ */
+enum {
+ NOT_AVAIL = -1,
+ USE_SRB_10 = -2,
+ USE_SRB_6 = -3,
+ USE_CDDA_FRAME_RAW = -4
+};
+
+enum lv1_atapi_proto {
+ NA_PROTO = -1,
+ NON_DATA_PROTO = 0,
+ PIO_DATA_IN_PROTO = 1,
+ PIO_DATA_OUT_PROTO = 2,
+ DMA_PROTO = 3
+};
+
+enum lv1_atapi_in_out {
+ DIR_NA = -1,
+ DIR_WRITE = 0, /* memory -> device */
+ DIR_READ = 1 /* device -> memory */
+};
+
+
+#ifdef DEBUG
+static const char *scsi_command(unsigned char cmd)
+{
+ switch (cmd) {
+ case TEST_UNIT_READY: return "TEST_UNIT_READY/GPCMD_TEST_UNIT_READY";
+ case REZERO_UNIT: return "REZERO_UNIT";
+ case REQUEST_SENSE: return "REQUEST_SENSE/GPCMD_REQUEST_SENSE";
+ case FORMAT_UNIT: return "FORMAT_UNIT/GPCMD_FORMAT_UNIT";
+ case READ_BLOCK_LIMITS: return "READ_BLOCK_LIMITS";
+ case REASSIGN_BLOCKS: return "REASSIGN_BLOCKS/INITIALIZE_ELEMENT_STATUS";
+ case READ_6: return "READ_6";
+ case WRITE_6: return "WRITE_6/MI_REPORT_TARGET_PGS";
+ case SEEK_6: return "SEEK_6";
+ case READ_REVERSE: return "READ_REVERSE";
+ case WRITE_FILEMARKS: return "WRITE_FILEMARKS/SAI_READ_CAPACITY_16";
+ case SPACE: return "SPACE";
+ case INQUIRY: return "INQUIRY/GPCMD_INQUIRY";
+ case RECOVER_BUFFERED_DATA: return "RECOVER_BUFFERED_DATA";
+ case MODE_SELECT: return "MODE_SELECT";
+ case RESERVE: return "RESERVE";
+ case RELEASE: return "RELEASE";
+ case COPY: return "COPY";
+ case ERASE: return "ERASE";
+ case MODE_SENSE: return "MODE_SENSE";
+ case START_STOP: return "START_STOP/GPCMD_START_STOP_UNIT";
+ case RECEIVE_DIAGNOSTIC: return "RECEIVE_DIAGNOSTIC";
+ case SEND_DIAGNOSTIC: return "SEND_DIAGNOSTIC";
+ case ALLOW_MEDIUM_REMOVAL: return "ALLOW_MEDIUM_REMOVAL/GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL";
+ case SET_WINDOW: return "SET_WINDOW";
+ case READ_CAPACITY: return "READ_CAPACITY/GPCMD_READ_CDVD_CAPACITY";
+ case READ_10: return "READ_10/GPCMD_READ_10";
+ case WRITE_10: return "WRITE_10/GPCMD_WRITE_10";
+ case SEEK_10: return "SEEK_10/POSITION_TO_ELEMENT/GPCMD_SEEK";
+ case WRITE_VERIFY: return "WRITE_VERIFY/GPCMD_WRITE_AND_VERIFY_10";
+ case VERIFY: return "VERIFY/GPCMD_VERIFY_10";
+ case SEARCH_HIGH: return "SEARCH_HIGH";
+ case SEARCH_EQUAL: return "SEARCH_EQUAL";
+ case SEARCH_LOW: return "SEARCH_LOW";
+ case SET_LIMITS: return "SET_LIMITS";
+ case PRE_FETCH: return "PRE_FETCH/READ_POSITION";
+ case SYNCHRONIZE_CACHE: return "SYNCHRONIZE_CACHE/GPCMD_FLUSH_CACHE";
+ case LOCK_UNLOCK_CACHE: return "LOCK_UNLOCK_CACHE";
+ case READ_DEFECT_DATA: return "READ_DEFECT_DATA";
+ case MEDIUM_SCAN: return "MEDIUM_SCAN";
+ case COMPARE: return "COMPARE";
+ case COPY_VERIFY: return "COPY_VERIFY";
+ case WRITE_BUFFER: return "WRITE_BUFFER";
+ case READ_BUFFER: return "READ_BUFFER";
+ case UPDATE_BLOCK: return "UPDATE_BLOCK";
+ case READ_LONG: return "READ_LONG";
+ case WRITE_LONG: return "WRITE_LONG";
+ case CHANGE_DEFINITION: return "CHANGE_DEFINITION";
+ case WRITE_SAME: return "WRITE_SAME";
+ case READ_TOC: return "READ_TOC/GPCMD_READ_TOC_PMA_ATIP";
+ case LOG_SELECT: return "LOG_SELECT";
+ case LOG_SENSE: return "LOG_SENSE";
+ case MODE_SELECT_10: return "MODE_SELECT_10/GPCMD_MODE_SELECT_10";
+ case RESERVE_10: return "RESERVE_10";
+ case RELEASE_10: return "RELEASE_10";
+ case MODE_SENSE_10: return "MODE_SENSE_10/GPCMD_MODE_SENSE_10";
+ case PERSISTENT_RESERVE_IN: return "PERSISTENT_RESERVE_IN";
+ case PERSISTENT_RESERVE_OUT: return "PERSISTENT_RESERVE_OUT";
+ case REPORT_LUNS: return "REPORT_LUNS";
+ case MAINTENANCE_IN: return "MAINTENANCE_IN/GPCMD_SEND_KEY";
+ case MOVE_MEDIUM: return "MOVE_MEDIUM";
+ case EXCHANGE_MEDIUM: return "EXCHANGE_MEDIUM/GPCMD_LOAD_UNLOAD";
+ case READ_12: return "READ_12/GPCMD_READ_12";
+ case WRITE_12: return "WRITE_12";
+ case WRITE_VERIFY_12: return "WRITE_VERIFY_12";
+ case SEARCH_HIGH_12: return "SEARCH_HIGH_12";
+ case SEARCH_EQUAL_12: return "SEARCH_EQUAL_12";
+ case SEARCH_LOW_12: return "SEARCH_LOW_12";
+ case READ_ELEMENT_STATUS: return "READ_ELEMENT_STATUS";
+ case SEND_VOLUME_TAG: return "SEND_VOLUME_TAG/GPCMD_SET_STREAMING";
+ case WRITE_LONG_2: return "WRITE_LONG_2";
+ case READ_16: return "READ_16";
+ case WRITE_16: return "WRITE_16";
+ case VERIFY_16: return "VERIFY_16";
+ case SERVICE_ACTION_IN: return "SERVICE_ACTION_IN";
+ case ATA_16: return "ATA_16";
+ case ATA_12: return "ATA_12/GPCMD_BLANK";
+ case GPCMD_CLOSE_TRACK: return "GPCMD_CLOSE_TRACK";
+ case GPCMD_GET_CONFIGURATION: return "GPCMD_GET_CONFIGURATION";
+ case GPCMD_GET_EVENT_STATUS_NOTIFICATION: return "GPCMD_GET_EVENT_STATUS_NOTIFICATION";
+ case GPCMD_GET_PERFORMANCE: return "GPCMD_GET_PERFORMANCE";
+ case GPCMD_MECHANISM_STATUS: return "GPCMD_MECHANISM_STATUS";
+ case GPCMD_PAUSE_RESUME: return "GPCMD_PAUSE_RESUME";
+ case GPCMD_PLAY_AUDIO_10: return "GPCMD_PLAY_AUDIO_10";
+ case GPCMD_PLAY_AUDIO_MSF: return "GPCMD_PLAY_AUDIO_MSF";
+ case GPCMD_PLAY_AUDIO_TI: return "GPCMD_PLAY_AUDIO_TI/GPCMD_PLAYAUDIO_TI";
+ case GPCMD_PLAY_CD: return "GPCMD_PLAY_CD";
+ case GPCMD_READ_BUFFER_CAPACITY: return "GPCMD_READ_BUFFER_CAPACITY";
+ case GPCMD_READ_CD: return "GPCMD_READ_CD";
+ case GPCMD_READ_CD_MSF: return "GPCMD_READ_CD_MSF";
+ case GPCMD_READ_DISC_INFO: return "GPCMD_READ_DISC_INFO";
+ case GPCMD_READ_DVD_STRUCTURE: return "GPCMD_READ_DVD_STRUCTURE";
+ case GPCMD_READ_FORMAT_CAPACITIES: return "GPCMD_READ_FORMAT_CAPACITIES";
+ case GPCMD_READ_HEADER: return "GPCMD_READ_HEADER";
+ case GPCMD_READ_TRACK_RZONE_INFO: return "GPCMD_READ_TRACK_RZONE_INFO";
+ case GPCMD_READ_SUBCHANNEL: return "GPCMD_READ_SUBCHANNEL";
+ case GPCMD_REPAIR_RZONE_TRACK: return "GPCMD_REPAIR_RZONE_TRACK";
+ case GPCMD_REPORT_KEY: return "GPCMD_REPORT_KEY";
+ case GPCMD_RESERVE_RZONE_TRACK: return "GPCMD_RESERVE_RZONE_TRACK";
+ case GPCMD_SEND_CUE_SHEET: return "GPCMD_SEND_CUE_SHEET";
+ case GPCMD_SCAN: return "GPCMD_SCAN";
+ case GPCMD_SEND_DVD_STRUCTURE: return "GPCMD_SEND_DVD_STRUCTURE";
+ case GPCMD_SEND_EVENT: return "GPCMD_SEND_EVENT";
+ case GPCMD_SEND_OPC: return "GPCMD_SEND_OPC";
+ case GPCMD_SET_READ_AHEAD: return "GPCMD_SET_READ_AHEAD";
+ case GPCMD_STOP_PLAY_SCAN: return "GPCMD_STOP_PLAY_SCAN";
+ case GPCMD_SET_SPEED: return "GPCMD_SET_SPEED";
+ case GPCMD_GET_MEDIA_STATUS: return "GPCMD_GET_MEDIA_STATUS";
+
+ default:
+ return "***UNKNOWN***";
+ }
+}
+#else /* !DEBUG */
+static inline const char *scsi_command(unsigned char cmd) { return NULL; }
+#endif /* DEBUG */
+
+
+static int ps3rom_slave_alloc(struct scsi_device *scsi_dev)
+{
+ struct ps3_storage_device *dev;
+
+ dev = (struct ps3_storage_device *)scsi_dev->host->hostdata[0];
+
+ dev_dbg(&dev->sbd.core, "%s:%u: id %u, lun %u, channel %u\n", __func__,
+ __LINE__, scsi_dev->id, scsi_dev->lun, scsi_dev->channel);
+
+ scsi_dev->hostdata = dev;
+ return 0;
+}
+
+static int ps3rom_slave_configure(struct scsi_device *scsi_dev)
+{
+ struct ps3_storage_device *dev = scsi_dev->hostdata;
+
+ dev_dbg(&dev->sbd.core, "%s:%u: id %u, lun %u, channel %u\n", __func__,
+ __LINE__, scsi_dev->id, scsi_dev->lun, scsi_dev->channel);
+
+ /*
+ * ATAPI SFF8020 devices use MODE_SENSE_10,
+ * so we can prohibit MODE_SENSE_6
+ */
+ scsi_dev->use_10_for_ms = 1;
+
+ return 0;
+}
+
+static void ps3rom_slave_destroy(struct scsi_device *scsi_dev)
+{
+}
+
+static int ps3rom_queuecommand(struct scsi_cmnd *cmd,
+ void (*done)(struct scsi_cmnd *))
+{
+ struct ps3_storage_device *dev = cmd->device->hostdata;
+ struct ps3rom_private *priv = ps3rom_priv(dev);
+
+ dev_dbg(&dev->sbd.core, "%s:%u: command 0x%02x (%s)\n", __func__,
+ __LINE__, cmd->cmnd[0], scsi_command(cmd->cmnd[0]));
+
+ spin_lock_irq(&priv->lock);
+ if (priv->cmd) {
+ /* no more than one can be processed */
+ dev_err(&dev->sbd.core, "%s:%u: more than 1 command queued\n",
+ __func__, __LINE__);
+ spin_unlock_irq(&priv->lock);
+ return SCSI_MLQUEUE_HOST_BUSY;
+ }
+
+ // FIXME Prevalidate commands?
+ priv->cmd = cmd;
+ priv->scsi_done = done;
+ spin_unlock_irq(&priv->lock);
+ wake_up_process(priv->thread);
+ return 0;
+}
+
+/*
+ * copy data from device into scatter/gather buffer
+ */
+static int fill_from_dev_buffer(struct scsi_cmnd *cmd, const void *buf,
+ int buflen)
+{
+ int k, req_len, act_len, len, active;
+ void *kaddr;
+ struct scatterlist *sgpnt;
+
+ if (!cmd->request_bufflen)
+ return 0;
+
+ if (!cmd->request_buffer)
+ return DID_ERROR << 16;
+
+ if (cmd->sc_data_direction != DMA_BIDIRECTIONAL &&
+ cmd->sc_data_direction != DMA_FROM_DEVICE)
+ return DID_ERROR << 16;
+
+ if (!cmd->use_sg) {
+ req_len = cmd->request_bufflen;
+ act_len = min(req_len, buflen);
+ memcpy(cmd->request_buffer, buf, act_len);
+ cmd->resid = req_len - act_len;
+ return 0;
+ }
+
+ sgpnt = cmd->request_buffer;
+ active = 1;
+ for (k = 0, req_len = 0, act_len = 0; k < cmd->use_sg; ++k, ++sgpnt) {
+ if (active) {
+ kaddr = kmap_atomic(sgpnt->page, KM_USER0);
+ if (!kaddr)
+ return DID_ERROR << 16;
+ len = sgpnt->length;
+ if ((req_len + len) > buflen) {
+ active = 0;
+ len = buflen - req_len;
+ }
+ memcpy(kaddr + sgpnt->offset, buf + req_len, len);
+ kunmap_atomic(kaddr, KM_USER0);
+ act_len += len;
+ }
+ req_len += sgpnt->length;
+ }
+ cmd->resid = req_len - act_len;
+ return 0;
+}
+
+/*
+ * copy data from scatter/gather into device's buffer
+ */
+static int fetch_to_dev_buffer(struct scsi_cmnd *cmd, void *buf, int buflen)
+{
+ int k, req_len, len, fin;
+ void *kaddr;
+ struct scatterlist *sgpnt;
+
+ if (!cmd->request_bufflen)
+ return 0;
+
+ if (!cmd->request_buffer)
+ return -1;
+
+ if (cmd->sc_data_direction != DMA_BIDIRECTIONAL &&
+ cmd->sc_data_direction != DMA_TO_DEVICE)
+ return -1;
+
+ if (!cmd->use_sg) {
+ req_len = cmd->request_bufflen;
+ len = min(req_len, buflen);
+ memcpy(buf, cmd->request_buffer, len);
+ return len;
+ }
+
+ sgpnt = cmd->request_buffer;
+ for (k = 0, req_len = 0, fin = 0; k < cmd->use_sg; ++k, ++sgpnt) {
+ kaddr = kmap_atomic(sgpnt->page, KM_USER0);
+ if (!kaddr)
+ return -1;
+ len = sgpnt->length;
+ if ((req_len + len) > buflen) {
+ len = buflen - req_len;
+ fin = 1;
+ }
+ memcpy(buf + req_len, kaddr + sgpnt->offset, len);
+ kunmap_atomic(kaddr, KM_USER0);
+ if (fin)
+ return req_len + len;
+ req_len += sgpnt->length;
+ }
+ return req_len;
+}
+
+static int decode_lv1_status(u64 status, unsigned char *sense_key,
+ unsigned char *asc, unsigned char *ascq)
+{
+ if (((status >> 24) & 0xff) != SAM_STAT_CHECK_CONDITION)
+ return -1;
+
+ *sense_key = (status >> 16) & 0xff;
+ *asc = (status >> 8) & 0xff;
+ *ascq = status & 0xff;
+ return 0;
+}
+
+static inline unsigned int srb6_lba(const struct scsi_cmnd *cmd)
+{
+ BUG_ON(cmd->cmnd[1] & 0xe0); // FIXME lun == 0
+ return cmd->cmnd[1] << 16 | cmd->cmnd[2] << 8 | cmd->cmnd[3];
+}
+
+static inline unsigned int srb6_len(const struct scsi_cmnd *cmd)
+{
+ return cmd->cmnd[4];
+}
+
+static inline unsigned int srb10_lba(const struct scsi_cmnd *cmd)
+{
+ return cmd->cmnd[2] << 24 | cmd->cmnd[3] << 16 | cmd->cmnd[4] << 8 |
+ cmd->cmnd[5];
+}
+
+static inline unsigned int srb10_len(const struct scsi_cmnd *cmd)
+{
+ return cmd->cmnd[7] << 8 | cmd->cmnd[8];
+}
+
+static inline unsigned int cdda_raw_len(const struct scsi_cmnd *cmd)
+{
+ unsigned int nframes;
+
+ nframes = cmd->cmnd[6] << 16 | cmd->cmnd[7] << 8 | cmd->cmnd[8];
+ return nframes * CD_FRAMESIZE_RAW;
+}
+
+static u64 ps3rom_send_atapi_command(struct ps3_storage_device *dev,
+ struct lv1_atapi_cmnd_block *cmd)
+{
+ dev_dbg(&dev->sbd.core, "%s:%u: send ATAPI command 0x%02x (%s)\n",
+ __func__, __LINE__, cmd->pkt[0], scsi_command(cmd->pkt[0]));
+
+ return ps3stor_send_command(dev, LV1_STORAGE_SEND_ATAPI_COMMAND,
+ ps3_mm_phys_to_lpar(__pa(cmd)),
+ sizeof(*cmd), cmd->buffer, cmd->arglen);
+}
+
+static void ps3rom_atapi_request(struct ps3_storage_device *dev,
+ struct scsi_cmnd *cmd, unsigned int len,
+ int proto, int in_out, int auto_sense)
+{
+ struct lv1_atapi_cmnd_block atapi_cmnd;
+ unsigned char *cmnd = cmd->cmnd;
+ u64 status;
+ unsigned char sense_key, asc, ascq;
+
+ if (len > dev->bounce_size) {
+ static int printed;
+ if (!printed++)
+ dev_err(&dev->sbd.core,
+ "%s:%u: data size too large %u > %lu\n",
+ __func__, __LINE__, len, dev->bounce_size);
+ cmd->result = DID_ERROR << 16;
+ memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
+ cmd->sense_buffer[0] = 0x70;
+ cmd->sense_buffer[2] = ILLEGAL_REQUEST;
+ return;
+ }
+
+ memset(&atapi_cmnd, 0, sizeof(struct lv1_atapi_cmnd_block));
+ memcpy(&atapi_cmnd.pkt, cmnd, 12);
+ atapi_cmnd.pktlen = 12;
+ atapi_cmnd.proto = proto;
+ if (in_out != DIR_NA)
+ atapi_cmnd.in_out = in_out;
+
+ if (atapi_cmnd.in_out == DIR_WRITE) {
+ // FIXME check error
+ fetch_to_dev_buffer(cmd, dev->bounce_buf, len);
+ }
+
+ atapi_cmnd.block_size = 1; /* transfer size is block_size * blocks */
+
+ atapi_cmnd.blocks = atapi_cmnd.arglen = len;
+ atapi_cmnd.buffer = dev->bounce_lpar;
+
+ status = ps3rom_send_atapi_command(dev, &atapi_cmnd);
+ if (status == -1) {
+ cmd->result = DID_ERROR << 16; /* FIXME: is better other error code ? */
+ return;
+ }
+
+ if (!status) {
+ /* OK, completed */
+ if (atapi_cmnd.in_out == DIR_READ) {
+ // FIXME check error
+ fill_from_dev_buffer(cmd, dev->bounce_buf, len);
+ }
+ cmd->result = DID_OK << 16;
+ return;
+ }
+
+ /* error */
+ if (!auto_sense) {
+ cmd->result = (DID_ERROR << 16) | (CHECK_CONDITION << 1);
+ dev_err(&dev->sbd.core, "%s:%u: end error without autosense\n",
+ __func__, __LINE__);
+ return;
+ }
+
+ if (!decode_lv1_status(status, &sense_key, &asc, &ascq)) {
+ /* lv1 may have issued autosense ... */
+ cmd->sense_buffer[0] = 0x70;
+ cmd->sense_buffer[2] = sense_key;
+ cmd->sense_buffer[7] = 16 - 6;
+ cmd->sense_buffer[12] = asc;
+ cmd->sense_buffer[13] = ascq;
+ cmd->result = SAM_STAT_CHECK_CONDITION;
+ return;
+ }
+
+ /* do auto sense by ourselves */
+ memset(&atapi_cmnd, 0, sizeof(struct lv1_atapi_cmnd_block));
+ atapi_cmnd.pkt[0] = REQUEST_SENSE;
+ atapi_cmnd.pkt[4] = 18;
+ atapi_cmnd.pktlen = 12;
+ atapi_cmnd.arglen = atapi_cmnd.blocks = atapi_cmnd.pkt[4];
+ atapi_cmnd.block_size = 1;
+ atapi_cmnd.proto = DMA_PROTO;
+ atapi_cmnd.in_out = DIR_READ;
+ atapi_cmnd.buffer = dev->bounce_lpar;
+
+ /* issue REQUEST_SENSE command */
+ status = ps3rom_send_atapi_command(dev, &atapi_cmnd);
+ if (status == -1) {
+ cmd->result = DID_ERROR << 16; /* FIXME: is better other error code ? */
+ return;
+ }
+
+ /* scsi spec says request sense should never get error */
+ if (status) {
+ decode_lv1_status(status, &sense_key, &asc, &ascq);
+ dev_err(&dev->sbd.core,
+ "%s:%u: auto REQUEST_SENSE error %#x %#x %#x\n",
+ __func__, __LINE__, sense_key, asc, ascq);
+ }
+
+ memcpy(cmd->sense_buffer, dev->bounce_buf,
+ min_t(size_t, atapi_cmnd.pkt[4], SCSI_SENSE_BUFFERSIZE));
+ cmd->result = SAM_STAT_CHECK_CONDITION;
+}
+
+static void ps3rom_read_request(struct ps3_storage_device *dev,
+ struct scsi_cmnd *cmd, u32 start_sector,
+ u32 sectors)
+{
+ u64 status;
+
+ status = ps3stor_read_write_sectors(dev, dev->bounce_lpar,
+ start_sector, sectors, 0);
+ if (status == -1) {
+ cmd->result = DID_ERROR << 16; /* FIXME: other error code? */
+ return;
+ }
+
+ if (status) {
+ memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
+ decode_lv1_status(dev->lv1_status, &cmd->sense_buffer[2],
+ &cmd->sense_buffer[12],
+ &cmd->sense_buffer[13]);
+ cmd->sense_buffer[7] = 16 - 6; // FIXME hardcoded numbers?
+ cmd->result = SAM_STAT_CHECK_CONDITION;
+ return;
+ }
+
+ // FIXME check error
+ fill_from_dev_buffer(cmd, dev->bounce_buf, sectors * CD_FRAMESIZE);
+
+ cmd->result = DID_OK << 16;
+}
+
+static void ps3rom_write_request(struct ps3_storage_device *dev,
+ struct scsi_cmnd *cmd, u32 start_sector,
+ u32 sectors)
+{
+ u64 status;
+
+ // FIXME check error
+ fetch_to_dev_buffer(cmd, dev->bounce_buf, sectors * CD_FRAMESIZE);
+
+ status = ps3stor_read_write_sectors(dev, dev->bounce_lpar,
+ start_sector, sectors, 1);
+ if (status == -1) {
+ cmd->result = DID_ERROR << 16; /* FIXME: other error code? */
+ return;
+ }
+
+ if (status) {
+ memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
+ decode_lv1_status(dev->lv1_status, &cmd->sense_buffer[2],
+ &cmd->sense_buffer[12],
+ &cmd->sense_buffer[13]);
+ cmd->sense_buffer[7] = 16 - 6; // FIXME hardcoded numbers?
+ cmd->result = SAM_STAT_CHECK_CONDITION;
+ return;
+ }
+
+ cmd->result = DID_OK << 16;
+}
+
+static void ps3rom_request(struct ps3_storage_device *dev,
+ struct scsi_cmnd *cmd)
+{
+ unsigned char opcode = cmd->cmnd[0];
+ struct ps3rom_private *priv = ps3rom_priv(dev);
+
+ dev_dbg(&dev->sbd.core, "%s:%u: command 0x%02x (%s)\n", __func__,
+ __LINE__, opcode, scsi_command(opcode));
+
+ switch (opcode) {
+ case INQUIRY:
+ ps3rom_atapi_request(dev, cmd, srb6_len(cmd),
+ PIO_DATA_IN_PROTO, DIR_READ, 1);
+ break;
+
+ case REQUEST_SENSE:
+ ps3rom_atapi_request(dev, cmd, srb6_len(cmd),
+ PIO_DATA_IN_PROTO, DIR_READ, 0);
+ break;
+
+ case ALLOW_MEDIUM_REMOVAL:
+ case START_STOP:
+ case TEST_UNIT_READY:
+ ps3rom_atapi_request(dev, cmd, 0, NON_DATA_PROTO, DIR_NA, 1);
+ break;
+
+ case READ_CAPACITY:
+ ps3rom_atapi_request(dev, cmd, 8, PIO_DATA_IN_PROTO, DIR_READ,
+ 1);
+ break;
+
+ case MODE_SENSE_10:
+ case READ_TOC:
+ case GPCMD_GET_CONFIGURATION:
+ case GPCMD_READ_DISC_INFO:
+ ps3rom_atapi_request(dev, cmd, srb10_len(cmd),
+ PIO_DATA_IN_PROTO, DIR_READ, 1);
+ break;
+
+ case READ_6:
+ ps3rom_read_request(dev, cmd, srb6_lba(cmd), srb6_len(cmd));
+ break;
+
+ case READ_10:
+ ps3rom_read_request(dev, cmd, srb10_lba(cmd), srb10_len(cmd));
+ break;
+
+ case WRITE_6:
+ ps3rom_write_request(dev, cmd, srb6_lba(cmd), srb6_len(cmd));
+ break;
+
+ case WRITE_10:
+ ps3rom_write_request(dev, cmd, srb10_lba(cmd), srb10_len(cmd));
+ break;
+
+ case GPCMD_READ_CD:
+ ps3rom_atapi_request(dev, cmd, cdda_raw_len(cmd), DMA_PROTO,
+ DIR_READ, 1);
+ break;
+
+ default:
+ dev_err(&dev->sbd.core, "%s:%u: illegal request 0x%02x (%s)\n",
+ __func__, __LINE__, opcode, scsi_command(opcode));
+ cmd->result = DID_ERROR << 16;
+ memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
+ cmd->sense_buffer[0] = 0x70;
+ cmd->sense_buffer[2] = ILLEGAL_REQUEST;
+ }
+
+ spin_lock_irq(&priv->lock);
+ priv->cmd = NULL;
+ priv->scsi_done(cmd);
+ spin_unlock_irq(&priv->lock);
+}
+
+static int ps3rom_thread(void *data)
+{
+ struct ps3_storage_device *dev = data;
+ struct ps3rom_private *priv = ps3rom_priv(dev);
+ struct scsi_cmnd *cmd;
+
+ dev_dbg(&dev->sbd.core, "%s thread init\n", __func__);
+
+ current->flags |= PF_NOFREEZE;
+
+ while (!kthread_should_stop()) {
+ spin_lock_irq(&priv->lock);
+ set_current_state(TASK_INTERRUPTIBLE);
+ cmd = priv->cmd;
+ spin_unlock_irq(&priv->lock);
+ if (!cmd) {
+ schedule();
+ continue;
+ }
+ ps3rom_request(dev, cmd);
+ }
+
+ dev_dbg(&dev->sbd.core, "%s thread exit\n", __func__);
+ return 0;
+}
+
+
+static struct scsi_host_template ps3rom_host_template = {
+ .name = DEVICE_NAME,
+ .slave_alloc = ps3rom_slave_alloc,
+ .slave_configure = ps3rom_slave_configure,
+ .slave_destroy = ps3rom_slave_destroy,
+ .queuecommand = ps3rom_queuecommand,
+ .can_queue = 1,
+ .this_id = 7,
+ .sg_tablesize = SG_ALL,
+ .cmd_per_lun = 1,
+ .emulated = 1, /* only sg driver uses this */
+ .max_sectors = PS3ROM_MAX_SECTORS,
+ .use_clustering = ENABLE_CLUSTERING,
+ .module = THIS_MODULE,
+};
+
+
+static int __devinit ps3rom_probe(struct ps3_system_bus_device *_dev)
+{
+ struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
+ struct ps3rom_private *priv;
+ int error;
+ struct Scsi_Host *host;
+ struct task_struct *task;
+
+ if (dev->blk_size != CD_FRAMESIZE) {
+ dev_err(&dev->sbd.core,
+ "%s:%u: cannot handle block size %lu\n", __func__,
+ __LINE__, dev->blk_size);
+ return -EINVAL;
+ }
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ ps3rom_priv(dev) = priv;
+ spin_lock_init(&priv->lock);
+
+ dev->bounce_size = BOUNCE_SIZE;
+ dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
+ if (!dev->bounce_buf) {
+ error = -ENOMEM;
+ goto fail_free_priv;
+ }
+
+ error = ps3stor_setup(dev, DEVICE_NAME);
+ if (error)
+ goto fail_free_bounce;
+
+ host = scsi_host_alloc(&ps3rom_host_template,
+ sizeof(struct ps3_system_bus_device *));
+ if (!host) {
+ dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed\n",
+ __func__, __LINE__);
+ goto fail_teardown;
+ }
+
+ priv->host = host;
+ host->hostdata[0] = (unsigned long)dev;
+
+ /* One device/LUN per SCSI bus */
+ host->max_id = 1;
+ host->max_lun = 1;
+
+ error = scsi_add_host(host, &dev->sbd.core);
+ if (error) {
+ dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed %d\n",
+ __func__, __LINE__, error);
+ error = -ENODEV;
+ goto fail_host_put;
+ }
+
+ task = kthread_run(ps3rom_thread, dev, DEVICE_NAME);
+ if (IS_ERR(task)) {
+ error = PTR_ERR(task);
+ goto fail_remove_host;
+ }
+ priv->thread = task;
+
+ scsi_scan_host(host);
+ return 0;
+
+fail_remove_host:
+ scsi_remove_host(host);
+fail_host_put:
+ scsi_host_put(host);
+fail_teardown:
+ ps3stor_teardown(dev);
+fail_free_bounce:
+ kfree(dev->bounce_buf);
+fail_free_priv:
+ kfree(priv);
+ return error;
+}
+
+static int ps3rom_remove(struct ps3_system_bus_device *_dev)
+{
+ struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
+ struct ps3rom_private *priv = ps3rom_priv(dev);
+
+ scsi_remove_host(priv->host);
+ scsi_host_put(priv->host);
+ kthread_stop(priv->thread);
+ ps3stor_teardown(dev);
+ kfree(dev->bounce_buf);
+ kfree(priv);
+ return 0;
+}
+
+
+static struct ps3_system_bus_driver ps3rom = {
+ .match_id = PS3_MATCH_ID_STOR_ROM,
+ .core.name = DEVICE_NAME,
+ .core.owner = THIS_MODULE,
+ .probe = ps3rom_probe,
+ .remove = ps3rom_remove
+};
+
+
+static int __init ps3rom_init(void)
+{
+ return ps3_system_bus_driver_register(&ps3rom, PS3_IOBUS_SB);
+}
+
+static void __exit ps3rom_exit(void)
+{
+ ps3_system_bus_driver_unregister(&ps3rom);
+}
+
+module_init(ps3rom_init);
+module_exit(ps3rom_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("PS3 ROM Storage Driver");
+MODULE_AUTHOR("Sony Corporation");
--
Gr{oetje,eeting}s,
Geert

--
Geert Uytterhoeven -- Sony Network and Software Technology Center Europe (NSCE)
Geert.Uytterhoeven@sonycom.com ------- The Corporate Village, Da Vincilaan 7-D1
Voice +32-2-7008453 Fax +32-2-7008622 ---------------- B-1935 Zaventem, Belgium
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