forked from Minki/linux
ps3: BD/DVD/CD-ROM Storage Driver
Add a BD/DVD/CD-ROM 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
Cc: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Geert Uytterhoeven
Linus Torvalds
parent
c6131fa528
commit
9aea8cbf28
@ -112,4 +112,15 @@ config PS3_DISK
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This support is required to access the PS3 hard disk.
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In general, all users will say Y or M.
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config PS3_ROM
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tristate "PS3 BD/DVD/CD-ROM Storage Driver"
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depends on PPC_PS3 && SCSI
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select PS3_STORAGE
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help
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Include support for the PS3 ROM Storage.
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This support is required to access the PS3 BD/DVD/CD-ROM drive.
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In general, all users will say Y or M.
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Also make sure to say Y or M to "SCSI CDROM support" later.
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endmenu
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@ -132,6 +132,7 @@ obj-$(CONFIG_SCSI_IBMVSCSI) += ibmvscsi/
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obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvscsi/
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obj-$(CONFIG_SCSI_HPTIOP) += hptiop.o
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obj-$(CONFIG_SCSI_STEX) += stex.o
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obj-$(CONFIG_PS3_ROM) += ps3rom.o
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obj-$(CONFIG_ARM) += arm/
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533
drivers/scsi/ps3rom.c
Normal file
533
drivers/scsi/ps3rom.c
Normal file
@ -0,0 +1,533 @@
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/*
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* PS3 BD/DVD/CD-ROM Storage Driver
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*
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* Copyright (C) 2007 Sony Computer Entertainment Inc.
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* Copyright 2007 Sony Corp.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published
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* by the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <linux/cdrom.h>
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#include <linux/highmem.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_dbg.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include <asm/lv1call.h>
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#include <asm/ps3stor.h>
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#define DEVICE_NAME "ps3rom"
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#define BOUNCE_SIZE (64*1024)
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#define PS3ROM_MAX_SECTORS (BOUNCE_SIZE / CD_FRAMESIZE)
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struct ps3rom_private {
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struct ps3_storage_device *dev;
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struct scsi_cmnd *curr_cmd;
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};
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#define LV1_STORAGE_SEND_ATAPI_COMMAND (1)
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struct lv1_atapi_cmnd_block {
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u8 pkt[32]; /* packet command block */
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u32 pktlen; /* should be 12 for ATAPI 8020 */
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u32 blocks;
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u32 block_size;
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u32 proto; /* transfer mode */
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u32 in_out; /* transfer direction */
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u64 buffer; /* parameter except command block */
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u32 arglen; /* length above */
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};
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enum lv1_atapi_proto {
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NON_DATA_PROTO = 0,
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PIO_DATA_IN_PROTO = 1,
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PIO_DATA_OUT_PROTO = 2,
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DMA_PROTO = 3
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};
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enum lv1_atapi_in_out {
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DIR_WRITE = 0, /* memory -> device */
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DIR_READ = 1 /* device -> memory */
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};
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static int ps3rom_slave_configure(struct scsi_device *scsi_dev)
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{
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struct ps3rom_private *priv = shost_priv(scsi_dev->host);
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struct ps3_storage_device *dev = priv->dev;
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dev_dbg(&dev->sbd.core, "%s:%u: id %u, lun %u, channel %u\n", __func__,
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__LINE__, scsi_dev->id, scsi_dev->lun, scsi_dev->channel);
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/*
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* ATAPI SFF8020 devices use MODE_SENSE_10,
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* so we can prohibit MODE_SENSE_6
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*/
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scsi_dev->use_10_for_ms = 1;
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/* we don't support {READ,WRITE}_6 */
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scsi_dev->use_10_for_rw = 1;
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return 0;
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}
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/*
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* copy data from device into scatter/gather buffer
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*/
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static int fill_from_dev_buffer(struct scsi_cmnd *cmd, const void *buf)
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{
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int k, req_len, act_len, len, active;
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void *kaddr;
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struct scatterlist *sgpnt;
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unsigned int buflen;
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buflen = cmd->request_bufflen;
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if (!buflen)
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return 0;
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if (!cmd->request_buffer)
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return -1;
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sgpnt = cmd->request_buffer;
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active = 1;
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for (k = 0, req_len = 0, act_len = 0; k < cmd->use_sg; ++k, ++sgpnt) {
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if (active) {
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kaddr = kmap_atomic(sgpnt->page, KM_IRQ0);
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len = sgpnt->length;
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if ((req_len + len) > buflen) {
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active = 0;
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len = buflen - req_len;
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}
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memcpy(kaddr + sgpnt->offset, buf + req_len, len);
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flush_kernel_dcache_page(sgpnt->page);
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kunmap_atomic(kaddr, KM_IRQ0);
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act_len += len;
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}
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req_len += sgpnt->length;
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}
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cmd->resid = req_len - act_len;
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return 0;
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}
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/*
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* copy data from scatter/gather into device's buffer
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*/
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static int fetch_to_dev_buffer(struct scsi_cmnd *cmd, void *buf)
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{
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int k, req_len, len, fin;
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void *kaddr;
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struct scatterlist *sgpnt;
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unsigned int buflen;
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buflen = cmd->request_bufflen;
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if (!buflen)
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return 0;
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if (!cmd->request_buffer)
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return -1;
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sgpnt = cmd->request_buffer;
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for (k = 0, req_len = 0, fin = 0; k < cmd->use_sg; ++k, ++sgpnt) {
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kaddr = kmap_atomic(sgpnt->page, KM_IRQ0);
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len = sgpnt->length;
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if ((req_len + len) > buflen) {
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len = buflen - req_len;
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fin = 1;
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}
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memcpy(buf + req_len, kaddr + sgpnt->offset, len);
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kunmap_atomic(kaddr, KM_IRQ0);
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if (fin)
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return req_len + len;
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req_len += sgpnt->length;
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}
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return req_len;
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}
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static int ps3rom_atapi_request(struct ps3_storage_device *dev,
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struct scsi_cmnd *cmd)
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{
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struct lv1_atapi_cmnd_block atapi_cmnd;
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unsigned char opcode = cmd->cmnd[0];
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int res;
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u64 lpar;
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dev_dbg(&dev->sbd.core, "%s:%u: send ATAPI command 0x%02x\n", __func__,
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__LINE__, opcode);
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memset(&atapi_cmnd, 0, sizeof(struct lv1_atapi_cmnd_block));
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memcpy(&atapi_cmnd.pkt, cmd->cmnd, 12);
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atapi_cmnd.pktlen = 12;
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atapi_cmnd.block_size = 1; /* transfer size is block_size * blocks */
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atapi_cmnd.blocks = atapi_cmnd.arglen = cmd->request_bufflen;
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atapi_cmnd.buffer = dev->bounce_lpar;
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switch (cmd->sc_data_direction) {
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case DMA_FROM_DEVICE:
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if (cmd->request_bufflen >= CD_FRAMESIZE)
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atapi_cmnd.proto = DMA_PROTO;
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else
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atapi_cmnd.proto = PIO_DATA_IN_PROTO;
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atapi_cmnd.in_out = DIR_READ;
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break;
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case DMA_TO_DEVICE:
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if (cmd->request_bufflen >= CD_FRAMESIZE)
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atapi_cmnd.proto = DMA_PROTO;
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else
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atapi_cmnd.proto = PIO_DATA_OUT_PROTO;
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atapi_cmnd.in_out = DIR_WRITE;
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res = fetch_to_dev_buffer(cmd, dev->bounce_buf);
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if (res < 0)
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return DID_ERROR << 16;
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break;
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default:
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atapi_cmnd.proto = NON_DATA_PROTO;
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break;
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}
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lpar = ps3_mm_phys_to_lpar(__pa(&atapi_cmnd));
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res = lv1_storage_send_device_command(dev->sbd.dev_id,
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LV1_STORAGE_SEND_ATAPI_COMMAND,
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lpar, sizeof(atapi_cmnd),
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atapi_cmnd.buffer,
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atapi_cmnd.arglen, &dev->tag);
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if (res == LV1_DENIED_BY_POLICY) {
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dev_dbg(&dev->sbd.core,
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"%s:%u: ATAPI command 0x%02x denied by policy\n",
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__func__, __LINE__, opcode);
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return DID_ERROR << 16;
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}
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if (res) {
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dev_err(&dev->sbd.core,
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"%s:%u: ATAPI command 0x%02x failed %d\n", __func__,
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__LINE__, opcode, res);
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return DID_ERROR << 16;
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}
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return 0;
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}
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static inline unsigned int srb10_lba(const struct scsi_cmnd *cmd)
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{
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return cmd->cmnd[2] << 24 | cmd->cmnd[3] << 16 | cmd->cmnd[4] << 8 |
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cmd->cmnd[5];
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}
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static inline unsigned int srb10_len(const struct scsi_cmnd *cmd)
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{
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return cmd->cmnd[7] << 8 | cmd->cmnd[8];
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}
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static int ps3rom_read_request(struct ps3_storage_device *dev,
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struct scsi_cmnd *cmd, u32 start_sector,
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u32 sectors)
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{
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int res;
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dev_dbg(&dev->sbd.core, "%s:%u: read %u sectors starting at %u\n",
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__func__, __LINE__, sectors, start_sector);
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res = lv1_storage_read(dev->sbd.dev_id,
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dev->regions[dev->region_idx].id, start_sector,
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sectors, 0, dev->bounce_lpar, &dev->tag);
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if (res) {
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dev_err(&dev->sbd.core, "%s:%u: read failed %d\n", __func__,
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__LINE__, res);
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return DID_ERROR << 16;
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}
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return 0;
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}
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static int ps3rom_write_request(struct ps3_storage_device *dev,
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struct scsi_cmnd *cmd, u32 start_sector,
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u32 sectors)
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{
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int res;
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dev_dbg(&dev->sbd.core, "%s:%u: write %u sectors starting at %u\n",
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__func__, __LINE__, sectors, start_sector);
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res = fetch_to_dev_buffer(cmd, dev->bounce_buf);
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if (res < 0)
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return DID_ERROR << 16;
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res = lv1_storage_write(dev->sbd.dev_id,
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dev->regions[dev->region_idx].id, start_sector,
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sectors, 0, dev->bounce_lpar, &dev->tag);
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if (res) {
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dev_err(&dev->sbd.core, "%s:%u: write failed %d\n", __func__,
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__LINE__, res);
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return DID_ERROR << 16;
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}
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return 0;
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}
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static int ps3rom_queuecommand(struct scsi_cmnd *cmd,
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void (*done)(struct scsi_cmnd *))
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{
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struct ps3rom_private *priv = shost_priv(cmd->device->host);
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struct ps3_storage_device *dev = priv->dev;
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unsigned char opcode;
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int res;
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#ifdef DEBUG
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scsi_print_command(cmd);
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#endif
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priv->curr_cmd = cmd;
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cmd->scsi_done = done;
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opcode = cmd->cmnd[0];
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/*
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* While we can submit READ/WRITE SCSI commands as ATAPI commands,
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* it's recommended for various reasons (performance, error handling,
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* ...) to use lv1_storage_{read,write}() instead
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*/
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switch (opcode) {
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case READ_10:
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res = ps3rom_read_request(dev, cmd, srb10_lba(cmd),
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srb10_len(cmd));
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break;
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case WRITE_10:
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res = ps3rom_write_request(dev, cmd, srb10_lba(cmd),
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srb10_len(cmd));
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break;
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default:
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res = ps3rom_atapi_request(dev, cmd);
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break;
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}
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if (res) {
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memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
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cmd->result = res;
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cmd->sense_buffer[0] = 0x70;
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cmd->sense_buffer[2] = ILLEGAL_REQUEST;
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priv->curr_cmd = NULL;
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cmd->scsi_done(cmd);
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}
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return 0;
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}
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static int decode_lv1_status(u64 status, unsigned char *sense_key,
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unsigned char *asc, unsigned char *ascq)
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{
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if (((status >> 24) & 0xff) != SAM_STAT_CHECK_CONDITION)
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return -1;
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*sense_key = (status >> 16) & 0xff;
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*asc = (status >> 8) & 0xff;
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*ascq = status & 0xff;
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return 0;
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}
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static irqreturn_t ps3rom_interrupt(int irq, void *data)
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{
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struct ps3_storage_device *dev = data;
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struct Scsi_Host *host;
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struct ps3rom_private *priv;
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struct scsi_cmnd *cmd;
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int res;
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u64 tag, status;
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unsigned char sense_key, asc, ascq;
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res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
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/*
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* status = -1 may mean that ATAPI transport completed OK, but
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* ATAPI command itself resulted CHECK CONDITION
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* so, upper layer should issue REQUEST_SENSE to check the sense data
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*/
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if (tag != dev->tag)
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dev_err(&dev->sbd.core,
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"%s:%u: tag mismatch, got %lx, expected %lx\n",
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__func__, __LINE__, tag, dev->tag);
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if (res) {
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dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%lx\n",
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__func__, __LINE__, res, status);
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return IRQ_HANDLED;
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}
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host = dev->sbd.core.driver_data;
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priv = shost_priv(host);
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cmd = priv->curr_cmd;
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if (!status) {
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/* OK, completed */
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if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
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res = fill_from_dev_buffer(cmd, dev->bounce_buf);
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if (res) {
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cmd->result = DID_ERROR << 16;
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goto done;
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}
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}
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cmd->result = DID_OK << 16;
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goto done;
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}
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if (cmd->cmnd[0] == REQUEST_SENSE) {
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/* SCSI spec says request sense should never get error */
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dev_err(&dev->sbd.core, "%s:%u: end error without autosense\n",
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__func__, __LINE__);
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cmd->result = DID_ERROR << 16 | SAM_STAT_CHECK_CONDITION;
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goto done;
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}
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if (decode_lv1_status(status, &sense_key, &asc, &ascq)) {
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cmd->result = DID_ERROR << 16;
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goto done;
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}
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cmd->sense_buffer[0] = 0x70;
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cmd->sense_buffer[2] = sense_key;
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cmd->sense_buffer[7] = 16 - 6;
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cmd->sense_buffer[12] = asc;
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cmd->sense_buffer[13] = ascq;
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cmd->result = SAM_STAT_CHECK_CONDITION;
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done:
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priv->curr_cmd = NULL;
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cmd->scsi_done(cmd);
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return IRQ_HANDLED;
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}
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static struct scsi_host_template ps3rom_host_template = {
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.name = DEVICE_NAME,
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.slave_configure = ps3rom_slave_configure,
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.queuecommand = ps3rom_queuecommand,
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.can_queue = 1,
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.this_id = 7,
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.sg_tablesize = SG_ALL,
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.cmd_per_lun = 1,
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.emulated = 1, /* only sg driver uses this */
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.max_sectors = PS3ROM_MAX_SECTORS,
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.use_clustering = ENABLE_CLUSTERING,
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.module = THIS_MODULE,
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};
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|
||||
|
||||
static int __devinit ps3rom_probe(struct ps3_system_bus_device *_dev)
|
||||
{
|
||||
struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
|
||||
int error;
|
||||
struct Scsi_Host *host;
|
||||
struct ps3rom_private *priv;
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
dev->bounce_size = BOUNCE_SIZE;
|
||||
dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
|
||||
if (!dev->bounce_buf)
|
||||
return -ENOMEM;
|
||||
|
||||
error = ps3stor_setup(dev, ps3rom_interrupt);
|
||||
if (error)
|
||||
goto fail_free_bounce;
|
||||
|
||||
host = scsi_host_alloc(&ps3rom_host_template,
|
||||
sizeof(struct ps3rom_private));
|
||||
if (!host) {
|
||||
dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed\n",
|
||||
__func__, __LINE__);
|
||||
goto fail_teardown;
|
||||
}
|
||||
|
||||
priv = shost_priv(host);
|
||||
dev->sbd.core.driver_data = host;
|
||||
priv->dev = 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;
|
||||
}
|
||||
|
||||
scsi_scan_host(host);
|
||||
return 0;
|
||||
|
||||
fail_host_put:
|
||||
scsi_host_put(host);
|
||||
dev->sbd.core.driver_data = NULL;
|
||||
fail_teardown:
|
||||
ps3stor_teardown(dev);
|
||||
fail_free_bounce:
|
||||
kfree(dev->bounce_buf);
|
||||
return error;
|
||||
}
|
||||
|
||||
static int ps3rom_remove(struct ps3_system_bus_device *_dev)
|
||||
{
|
||||
struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
|
||||
struct Scsi_Host *host = dev->sbd.core.driver_data;
|
||||
|
||||
scsi_remove_host(host);
|
||||
ps3stor_teardown(dev);
|
||||
scsi_host_put(host);
|
||||
dev->sbd.core.driver_data = NULL;
|
||||
kfree(dev->bounce_buf);
|
||||
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);
|
||||
}
|
||||
|
||||
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 BD/DVD/CD-ROM Storage Driver");
|
||||
MODULE_AUTHOR("Sony Corporation");
|
||||
MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_ROM);
|
||||
Loading…
Reference in New Issue
Block a user