login
Search
On 17 Oct, Stefan Richter wrote:commit 83431cba3d847fc2296d3f38ce7feb623a1cfc45 Author: Jay Fenlason <fenlason@redhat.com> Date: Mon Oct 8 17:00:29 2007 -0400 firewire: fw-cdev: reorder wakeup vs. spinlock Signed-off-by: Jay Fenlason <fenlason@redhat.com> Prompted by https://bugzilla.redhat.com/show_bug.cgi?id=323411 Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c index 290d9f0..60f1a89 100644 --- a/drivers/firewire/fw-cdev.c +++ b/drivers/firewire/fw-cdev.c @@ -143,11 +143,10 @@ static void queue_event(struct client *client, struct event *event, event->v[1].size = size1; spin_lock_irqsave(&client->lock, flags); - list_add_tail(&event->link, &client->event_list); - wake_up_interruptible(&client->wait); - spin_unlock_irqrestore(&client->lock, flags); + + wake_up_interruptible(&client->wait); } static int commit c1b91ce49158d607666dbef5b8d53cd77d397589 Author: Yann Dirson <ydirson@altern.org> Date: Sun Oct 7 02:21:29 2007 +0200 firewire: in-code doc updates. Signed-off-by: Yann Dirson <ydirson@altern.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (update) diff --git a/drivers/firewire/fw-topology.c b/drivers/firewire/fw-topology.c index 45e6f9b..0fc9b00 100644 --- a/drivers/firewire/fw-topology.c +++ b/drivers/firewire/fw-topology.c @@ -166,7 +166,7 @@ static inline struct fw_node *fw_node(struct list_head *l) * This function builds the tree representation of the topology given * by the self IDs from the latest bus reset. During the construction * of the tree, the function checks that the self IDs are valid and - * internally consistent. On succcess this funtions returns the + * internally consistent. On succcess this function returns the * fw_node corresponding to the local card otherwise NULL. */ static struct fw_node *build_tree(struct fw_card *card, @@ -215,6 +215,10 @@ static struct fw_node *build_tree(struct fw_card *card, */ for (i = 0, h = &stack; i < child_port_count; i++) h = h->prev; + /* + * When the stack is empty, this yields an invalid value, + * but that pointer will never be dereferenced. + */ child = fw_node(h); node = fw_node_create(q, port_count, card->color); commit e5f84f82bdc5f8a5ce3d33aa6a2cc727fc08bda6 Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Sun Oct 7 02:10:11 2007 +0200 firewire: a header cleanup fw_node() is not used (and not useful) outside fw-topology.c. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/firewire/fw-topology.c b/drivers/firewire/fw-topology.c index 39e5cd1..45e6f9b 100644 --- a/drivers/firewire/fw-topology.c +++ b/drivers/firewire/fw-topology.c @@ -152,6 +152,10 @@ static void update_hop_count(struct fw_node *node) node->max_hops = max(max_child_hops, depths[0] + depths[1] + 2); } +static inline struct fw_node *fw_node(struct list_head *l) +{ + return list_entry(l, struct fw_node, link); +} /** * build_tree - Build the tree representation of the topology diff --git a/drivers/firewire/fw-topology.h b/drivers/firewire/fw-topology.h index 1b56b4a..cedc1ec 100644 --- a/drivers/firewire/fw-topology.h +++ b/drivers/firewire/fw-topology.h @@ -51,12 +51,6 @@ struct fw_node { }; static inline struct fw_node * -fw_node(struct list_head *l) -{ - return list_entry(l, struct fw_node, link); -} - -static inline struct fw_node * fw_node_get(struct fw_node *node) { atomic_inc(&node->ref_count); commit a64408b96b5f67c2778958a230b5cfa3408a4a81 Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Sat Sep 29 10:41:58 2007 +0200 firewire: adopt read cycle timer ABI from raw1394 This duplicates the read cycle timer feature of raw1394 (added in Linux 2.6.21) in firewire-core's userspace ABI. The argument to the ioctl is reordered though to ensure 32/64 bit compatibility. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com> diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c index b960fd9..290d9f0 100644 --- a/drivers/firewire/fw-cdev.c +++ b/drivers/firewire/fw-cdev.c @@ -25,11 +25,14 @@ #include <linux/device.h> #include <linux/vmalloc.h> #include <linux/poll.h> +#include <linux/preempt.h> +#include <linux/time.h> #include <linux/delay.h> #include <linux/mm.h> #include <linux/idr.h> #include <linux/compat.h> #include <linux/firewire-cdev.h> +#include <asm/system.h> #include <asm/uaccess.h> #include "fw-transaction.h" #include "fw-topology.h" @@ -811,6 +814,28 @@ static int ioctl_stop_iso(struct client *client, void *buffer) return fw_iso_context_stop(client->iso_context); } +static int ioctl_get_cycle_timer(struct client *client, void *buffer) +{ + struct fw_cdev_get_cycle_timer *request = buffer; + struct fw_card *card = client->device->card; + unsigned long long bus_time; + struct timeval tv; + unsigned long flags; + + preempt_disable(); + local_irq_save(flags); + + bus_time = card->driver->get_bus_time(card); + do_gettimeofday(&tv); + + local_irq_restore(flags); + preempt_enable(); + + request->local_time = tv.tv_sec * 1000000ULL + tv.tv_usec; + request->cycle_timer = bus_time & 0xffffffff; + return 0; +} + static int (* const ioctl_handlers[])(struct client *client, void *buffer) = { ioctl_get_info, ioctl_send_request, @@ -824,6 +849,7 @@ static int (* const ioctl_handlers[])(struct client *client, void *buffer) = { ioctl_queue_iso, ioctl_start_iso, ioctl_stop_iso, + ioctl_get_cycle_timer, }; static int diff --git a/include/linux/firewire-cdev.h b/include/linux/firewire-cdev.h index 1a45d6f..0f0e271 100644 --- a/include/linux/firewire-cdev.h +++ b/include/linux/firewire-cdev.h @@ -178,6 +178,7 @@ union fw_cdev_event { #define FW_CDEV_IOC_QUEUE_ISO _IOWR('#', 0x09, struct fw_cdev_queue_iso) #define FW_CDEV_IOC_START_ISO _IOW('#', 0x0a, struct fw_cdev_start_iso) #define FW_CDEV_IOC_STOP_ISO _IOW('#', 0x0b, struct fw_cdev_stop_iso) +#define FW_CDEV_IOC_GET_CYCLE_TIMER _IOR('#', 0x0c, struct fw_cdev_get_cycle_timer) /* FW_CDEV_VERSION History * @@ -459,4 +460,18 @@ struct fw_cdev_stop_iso { __u32 handle; }; +/** + * struct fw_cdev_get_cycle_timer - read cycle timer register + * @local_time: system time, in microseconds since the Epoch + * @cycle_timer: isochronous cycle timer, as per OHCI 1.1 clause 5.13 + * + * The %FW_CDEV_IOC_GET_CYCLE_TIMER ioctl reads the isochronous cycle timer + * and also the system clock. This allows to express the receive time of an + * isochronous packet as a system time with microsecond accuracy. + */ +struct fw_cdev_get_cycle_timer { + __u64 local_time; + __u32 cycle_timer; +}; + #endif /* _LINUX_FIREWIRE_CDEV_H */ commit 02ff8f8ee151e880414b99a11f67cae0cecd4977 Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Thu Aug 30 00:11:40 2007 +0200 firewire: fw-ohci: check for misconfigured bus (phyID == 63) Check NodeID.nodeNumber as per OHCI 1.1 clause 7.2.3.2. See also IEEE 1394a table 5B-1. Also, demote the "node ID not valid" message from error to notification as it is not an error condition. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c index ec70c9f..2f307c4 100644 --- a/drivers/firewire/fw-ohci.c +++ b/drivers/firewire/fw-ohci.c @@ -917,10 +917,15 @@ static void bus_reset_tasklet(unsigned long data) reg = reg_read(ohci, OHCI1394_NodeID); if (!(reg & OHCI1394_NodeID_idValid)) { - fw_error("node ID not valid, new bus reset in progress\n"); + fw_notify("node ID not valid, new bus reset in progress\n"); return; } - ohci->node_id = reg & 0xffff; + if ((reg & OHCI1394_NodeID_nodeNumber) == 63) { + fw_notify("malconfigured bus\n"); + return; + } + ohci->node_id = reg & (OHCI1394_NodeID_busNumber | + OHCI1394_NodeID_nodeNumber); /* * The count in the SelfIDCount register is the number of diff --git a/drivers/firewire/fw-ohci.h b/drivers/firewire/fw-ohci.h index fa15706..dec4f04 100644 --- a/drivers/firewire/fw-ohci.h +++ b/drivers/firewire/fw-ohci.h @@ -59,6 +59,8 @@ #define OHCI1394_LinkControl_cycleSource (1 << 22) #define OHCI1394_NodeID 0x0E8 #define OHCI1394_NodeID_idValid 0x80000000 +#define OHCI1394_NodeID_nodeNumber 0x0000003f +#define OHCI1394_NodeID_busNumber 0x0000ffc0 #define OHCI1394_PhyControl 0x0EC #define OHCI1394_PhyControl_Read(addr) (((addr) << 8) | 0x00008000) #define OHCI1394_PhyControl_ReadDone 0x80000000 commit ab88ca488b8af66c3defa165874e81e695319a19 Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Wed Aug 29 19:40:28 2007 +0200 firewire: fw-ohci: missing dma_unmap_single at_context_queue_packet() didn't clean up in an early exit path. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com> diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c index a333748..ec70c9f 100644 --- a/drivers/firewire/fw-ohci.c +++ b/drivers/firewire/fw-ohci.c @@ -680,6 +680,9 @@ at_context_queue_packet(struct context *ctx, struct fw_packet *packet) /* FIXME: Document how the locking works. */ if (ohci->generation != packet->generation) { + if (packet->payload_length > 0) + dma_unmap_single(ohci->card.device, payload_bus, + packet->payload_length, DMA_TO_DEVICE); packet->ack = RCODE_GENERATION; return -1; } commit e524f616f59722bc7f93eb1fd79d3bbdcdf4f894 Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Mon Aug 20 21:58:30 2007 +0200 firewire: fw-ohci: log posted write errors Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c index c16fcb9..a333748 100644 --- a/drivers/firewire/fw-ohci.c +++ b/drivers/firewire/fw-ohci.c @@ -18,6 +18,7 @@ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include <linux/compiler.h> #include <linux/delay.h> #include <linux/dma-mapping.h> #include <linux/gfp.h> @@ -1049,6 +1050,9 @@ static irqreturn_t irq_handler(int irq, void *data) iso_event &= ~(1 << i); } + if (unlikely(event & OHCI1394_postedWriteErr)) + fw_error("PCI posted write error\n"); + if (event & OHCI1394_cycle64Seconds) { cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer); if ((cycle_time & 0x80000000) == 0) @@ -1122,8 +1126,8 @@ static int ohci_enable(struct fw_card *card, u32 *config_rom, size_t length) OHCI1394_RQPkt | OHCI1394_RSPkt | OHCI1394_reqTxComplete | OHCI1394_respTxComplete | OHCI1394_isochRx | OHCI1394_isochTx | - OHCI1394_masterIntEnable | - OHCI1394_cycle64Seconds); + OHCI1394_postedWriteErr | OHCI1394_cycle64Seconds | + OHCI1394_masterIntEnable); /* Activate link_on bit and contender bit in our self ID packets.*/ if (ohci_update_phy_reg(card, 4, 0, commit a7fb60db711fce56e372f0bb8a733c0ad1743525 Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Mon Aug 20 21:41:22 2007 +0200 firewire: fw-ohci: reorder includes Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c index 48768b5..c16fcb9 100644 --- a/drivers/firewire/fw-ohci.c +++ b/drivers/firewire/fw-ohci.c @@ -18,22 +18,22 @@ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/pci.h> #include <linux/delay.h> #include <linux/dma-mapping.h> #include <linux/gfp.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> #include <linux/mm.h> +#include <linux/module.h> +#include <linux/pci.h> #include <linux/spinlock.h> #include <asm/page.h> #include <asm/system.h> -#include "fw-transaction.h" #include "fw-ohci.h" +#include "fw-transaction.h" #define DESCRIPTOR_OUTPUT_MORE 0 #define DESCRIPTOR_OUTPUT_LAST (1 << 12) commit c26f02340e89c55390c9044ea65d9aef610b38f5 Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Mon Aug 20 21:40:30 2007 +0200 firewire: fw-ohci: fix includes Add used includes, remove unused includes. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c index a7947ba..48768b5 100644 --- a/drivers/firewire/fw-ohci.c +++ b/drivers/firewire/fw-ohci.c @@ -24,12 +24,12 @@ #include <linux/interrupt.h> #include <linux/pci.h> #include <linux/delay.h> -#include <linux/poll.h> #include <linux/dma-mapping.h> +#include <linux/gfp.h> #include <linux/mm.h> +#include <linux/spinlock.h> -#include <asm/uaccess.h> -#include <asm/semaphore.h> +#include <asm/page.h> #include <asm/system.h> #include "fw-transaction.h" commit ee71c2f9ee85117e41ef87357ed8f75d29369b98 Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Sat Aug 25 14:08:19 2007 +0200 firewire: fw-ohci: enforce read order for selfID generation It seems unlikely, but access to self_id_cpu[0] could at least in theory be deferred until after the loop over self_id_cpu[1..n] or even after the subsequent reg_read. Enforce the desired order by a read barrier. Also prevent the reg_read from being reordered relative to the for loop. This isn't necessary if the loop's conditional printk counts as an implicit barrier, but better make it explicit. (self_id_cpu[] is a coherent DMA buffer.) Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c index e14c1ca..a7947ba 100644 --- a/drivers/firewire/fw-ohci.c +++ b/drivers/firewire/fw-ohci.c @@ -30,6 +30,7 @@ #include <asm/uaccess.h> #include <asm/semaphore.h> +#include <asm/system.h> #include "fw-transaction.h" #include "fw-ohci.h" @@ -926,12 +927,14 @@ static void bus_reset_tasklet(unsigned long data) self_id_count = (reg_read(ohci, OHCI1394_SelfIDCount) >> 3) & 0x3ff; generation = (le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff; + rmb(); for (i = 1, j = 0; j < self_id_count; i += 2, j++) { if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) fw_error("inconsistent self IDs\n"); ohci->self_id_buffer[j] = le32_to_cpu(ohci->self_id_cpu[i]); } + rmb(); /* * Check the consistency of the self IDs we just read. The commit df8ec2490fed5dd23316bbb2c2e90e59e7d37126 Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Sun Aug 12 12:51:18 2007 +0200 firewire: fw-sbp2: use an own workqueue (fix system responsiveness) Firewire-sbp2 did very uncooperative things in the kernel's shared workqueue: Sleeping until reception of management status from the target for up to 2 seconds, and performing SCSI inquiry and all of the setup of SCSI command set drivers via scsi_add_device. If there were transient or permanent error conditions, this caused long blockage of the kernel's events process, noticeable e.g. by blocked keyboard input. We now allocate a workqueue process exclusive to fw-sbp2. As a side effect, this also increases parallelism of fw-sbp2's login and reconnect work versus fw-core's device discovery and device update work which is performed in the shared workqueue. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com> diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c index f96f192..5596df6 100644 --- a/drivers/firewire/fw-sbp2.c +++ b/drivers/firewire/fw-sbp2.c @@ -39,6 +39,7 @@ #include <linux/string.h> #include <linux/stringify.h> #include <linux/timer.h> +#include <linux/workqueue.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> @@ -625,6 +626,8 @@ static void sbp2_release_target(struct kref *kref) scsi_host_put(shost); } +static struct workqueue_struct *sbp2_wq; + static void sbp2_reconnect(struct work_struct *work); static void sbp2_login(struct work_struct *work) @@ -647,7 +650,8 @@ static void sbp2_login(struct work_struct *work) if (sbp2_send_management_orb(lu, node_id, generation, SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { if (lu->retries++ < 5) { - schedule_delayed_work(&lu->work, DIV_ROUND_UP(HZ, 5)); + queue_delayed_work(sbp2_wq, &lu->work, + DIV_ROUND_UP(HZ, 5)); } else { fw_error("failed to login to %s LUN %04x\n", unit->device.bus_id, lu->lun); @@ -866,7 +870,7 @@ static int sbp2_probe(struct device *dev) * work. */ list_for_each_entry(lu, &tgt->lu_list, link) - if (schedule_delayed_work(&lu->work, 0)) + if (queue_delayed_work(sbp2_wq, &lu->work, 0)) kref_get(&tgt->kref); return 0; @@ -910,7 +914,7 @@ static void sbp2_reconnect(struct work_struct *work) lu->retries = 0; PREPARE_DELAYED_WORK(&lu->work, sbp2_login); } - schedule_delayed_work(&lu->work, DIV_ROUND_UP(HZ, 5)); + queue_delayed_work(sbp2_wq, &lu->work, DIV_ROUND_UP(HZ, 5)); return; } @@ -940,7 +944,7 @@ static void sbp2_update(struct fw_unit *unit) */ list_for_each_entry(lu, &tgt->lu_list, link) { lu->retries = 0; - if (schedule_delayed_work(&lu->work, 0)) + if (queue_delayed_work(sbp2_wq, &lu->work, 0)) kref_get(&tgt->kref); } } @@ -1335,12 +1339,17 @@ MODULE_ALIAS("sbp2"); static int __init sbp2_init(void) { + sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME); + if (!sbp2_wq) + return -ENOMEM; + return driver_register(&sbp2_driver.driver); } static void __exit sbp2_cleanup(void) { driver_unregister(&sbp2_driver.driver); + destroy_workqueue(sbp2_wq); } module_init(sbp2_init); commit 2df222b8f8fe9e18c9c9fdfd46f60dad55f5ac14 Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Mon Aug 13 17:48:25 2007 +0200 firewire: fw-sbp2: expose module parameter for workarounds On rare occasions, the ability to set one of the workaround flags at runtime may save the day. People who experience I/O errors with firewire-sbp2 while the old sbp2 driver worked for them should try workarounds=1 and report to the devel mailinglist whether that improves things. Firewire-sbp2 defaults to the SCSI stack's maximum transfer size per command, while sbp2 limits them to 128 kBytes. Flag 1 accomplishes just that. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c index 1efc67b..f96f192 100644 --- a/drivers/firewire/fw-sbp2.c +++ b/drivers/firewire/fw-sbp2.c @@ -37,6 +37,7 @@ #include <linux/dma-mapping.h> #include <linux/blkdev.h> #include <linux/string.h> +#include <linux/stringify.h> #include <linux/timer.h> #include <scsi/scsi.h> @@ -60,6 +61,46 @@ module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " "(default = Y, use N for concurrent initiators)"); +/* + * Flags for firmware oddities + * + * - 128kB max transfer + * Limit transfer size. Necessary for some old bridges. + * + * - 36 byte inquiry + * When scsi_mod probes the device, let the inquiry command look like that + * from MS Windows. + * + * - skip mode page 8 + * Suppress sending of mode_sense for mode page 8 if the device pretends to + * support the SCSI Primary Block commands instead of Reduced Block Commands. + * + * - fix capacity + * Tell sd_mod to correct the last sector number reported by read_capacity. + * Avoids access beyond actual disk limits on devices with an off-by-one bug. + * Don't use this with devices which don't have this bug. + * + * - override internal blacklist + * Instead of adding to the built-in blacklist, use only the workarounds + * specified in the module load parameter. + * Useful if a blacklist entry interfered with a non-broken device. + */ +#define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 +#define SBP2_WORKAROUND_INQUIRY_36 0x2 +#define SBP2_WORKAROUND_MODE_SENSE_8 0x4 +#define SBP2_WORKAROUND_FIX_CAPACITY 0x8 +#define SBP2_WORKAROUND_OVERRIDE 0x100 + +static int sbp2_param_workarounds; +module_param_named(workarounds, sbp2_param_workarounds, int, 0644); +MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" + ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) + ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) + ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) + ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) + ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) + ", or a combination)"); + /* I don't know why the SCSI stack doesn't define something like this... */ typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); @@ -122,13 +163,6 @@ struct sbp2_target { #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 -/* Flags for detected oddities and brokeness */ -#define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 -#define SBP2_WORKAROUND_INQUIRY_36 0x2 -#define SBP2_WORKAROUND_MODE_SENSE_8 0x4 -#define SBP2_WORKAROUND_FIX_CAPACITY 0x8 -#define SBP2_WORKAROUND_OVERRIDE 0x100 - /* Management orb opcodes */ #define SBP2_LOGIN_REQUEST 0x0 #define SBP2_QUERY_LOGINS_REQUEST 0x1 @@ -751,8 +785,15 @@ static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, u32 firmware_revision) { int i; + unsigned w = sbp2_param_workarounds; + + if (w) + fw_notify("Please notify linux1394-devel@lists.sourceforge.net " + "if you need the workarounds parameter for %s\n", + tgt->unit->device.bus_id); - tgt->workarounds = 0; + if (w & SBP2_WORKAROUND_OVERRIDE) + goto out; for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { @@ -764,15 +805,16 @@ static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, sbp2_workarounds_table[i].model != ~0) continue; - tgt->workarounds |= sbp2_workarounds_table[i].workarounds; + w |= sbp2_workarounds_table[i].workarounds; break; } - - if (tgt->workarounds) + out: + if (w) fw_notify("Workarounds for %s: 0x%x " "(firmware_revision 0x%06x, model_id 0x%06x)\n", tgt->unit->device.bus_id, - tgt->workarounds, firmware_revision, model); + w, firmware_revision, model); + tgt->workarounds = w; } static struct scsi_host_template scsi_driver_template; commit 5a3c2be6c9a5641a06c71c906645d676fa4d3fdc Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Sat Aug 25 14:05:28 2007 +0200 firewire: fw-sbp2: add support for multiple logical units per target Fixes "New firewire stack only recognizing half of a chain of drives", https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=242254 Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/firewire/fw-device.h b/drivers/firewire/fw-device.h index d13e6a6..894d4a9 100644 --- a/drivers/firewire/fw-device.h +++ b/drivers/firewire/fw-device.h @@ -102,11 +102,6 @@ fw_unit(struct device *dev) #define CSR_INSTANCE 0x18 #define CSR_DIRECTORY_ID 0x20 -#define SBP2_COMMAND_SET_SPECIFIER 0x38 -#define SBP2_COMMAND_SET 0x39 -#define SBP2_COMMAND_SET_REVISION 0x3b -#define SBP2_FIRMWARE_REVISION 0x3c - struct fw_csr_iterator { u32 *p; u32 *end; diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c index 7ecc154..1efc67b 100644 --- a/drivers/firewire/fw-sbp2.c +++ b/drivers/firewire/fw-sbp2.c @@ -41,7 +41,6 @@ #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> -#include <scsi/scsi_dbg.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> @@ -66,31 +65,49 @@ typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); static const char sbp2_driver_name[] = "sbp2"; -struct sbp2_device { - struct kref kref; - struct fw_unit *unit; +/* + * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry + * and one struct scsi_device per sbp2_logical_unit. + */ +struct sbp2_logical_unit { + struct sbp2_target *tgt; + struct list_head link; + struct scsi_device *sdev; struct fw_address_handler address_handler; struct list_head orb_list; - u64 management_agent_address; + u64 command_block_agent_address; - u32 workarounds; + u16 lun; int login_id; /* - * We cache these addresses and only update them once we've - * logged in or reconnected to the sbp2 device. That way, any - * IO to the device will automatically fail and get retried if - * it happens in a window where the device is not ready to - * handle it (e.g. after a bus reset but before we reconnect). + * The generation is updated once we've logged in or reconnected + * to the logical unit. Thus, I/O to the device will automatically + * fail and get retried if it happens in a window where the device + * is not ready, e.g. after a bus reset but before we reconnect. */ - int node_id; - int address_high; int generation; - int retries; struct delayed_work work; }; +/* + * We create one struct sbp2_target per IEEE 1212 Unit Directory + * and one struct Scsi_Host per sbp2_target. + */ +struct sbp2_target { + struct kref kref; + struct fw_unit *unit; + + u64 management_agent_address; + int directory_id; + int node_id; + int address_high; + + unsigned workarounds; + struct list_head lu_list; +}; + #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 #define SBP2_MAX_SECTORS 255 /* Max sectors supported */ #define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */ @@ -101,10 +118,9 @@ struct sbp2_device { #define SBP2_DIRECTION_FROM_MEDIA 0x1 /* Unit directory keys */ -#define SBP2_COMMAND_SET_SPECIFIER 0x38 -#define SBP2_COMMAND_SET 0x39 -#define SBP2_COMMAND_SET_REVISION 0x3b -#define SBP2_FIRMWARE_REVISION 0x3c +#define SBP2_CSR_FIRMWARE_REVISION 0x3c +#define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 +#define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 /* Flags for detected oddities and brokeness */ #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 @@ -219,7 +235,7 @@ struct sbp2_command_orb { } request; struct scsi_cmnd *cmd; scsi_done_fn_t done; - struct fw_unit *unit; + struct sbp2_logical_unit *lu; struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); dma_addr_t page_table_bus; @@ -295,7 +311,7 @@ sbp2_status_write(struct fw_card *card, struct fw_request *request, unsigned long long offset, void *payload, size_t length, void *callback_data) { - struct sbp2_device *sd = callback_data; + struct sbp2_logical_unit *lu = callback_data; struct sbp2_orb *orb; struct sbp2_status status; size_t header_size; @@ -319,7 +335,7 @@ sbp2_status_write(struct fw_card *card, struct fw_request *request, /* Lookup the orb corresponding to this status write. */ spin_lock_irqsave(&card->lock, flags); - list_for_each_entry(orb, &sd->orb_list, link) { + list_for_each_entry(orb, &lu->orb_list, link) { if (STATUS_GET_ORB_HIGH(status) == 0 && STATUS_GET_ORB_LOW(status) == orb->request_bus) { orb->rcode = RCODE_COMPLETE; @@ -329,7 +345,7 @@ sbp2_status_write(struct fw_card *card, struct fw_request *request, } spin_unlock_irqrestore(&card->lock, flags); - if (&orb->link != &sd->orb_list) + if (&orb->link != &lu->orb_list) orb->callback(orb, &status); else fw_error("status write for unknown orb\n"); @@ -371,11 +387,10 @@ complete_transaction(struct fw_card *card, int rcode, } static void -sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, +sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, int node_id, int generation, u64 offset) { - struct fw_device *device = fw_device(unit->device.parent); - struct sbp2_device *sd = unit->device.driver_data; + struct fw_device *device = fw_device(lu->tgt->unit->device.parent); unsigned long flags; orb->pointer.high = 0; @@ -383,7 +398,7 @@ sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer)); spin_lock_irqsave(&device->card->lock, flags); - list_add_tail(&orb->link, &sd->orb_list); + list_add_tail(&orb->link, &lu->orb_list); spin_unlock_irqrestore(&device->card->lock, flags); /* Take a ref for the orb list and for the transaction callback. */ @@ -396,10 +411,9 @@ sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, complete_transaction, orb); } -static int sbp2_cancel_orbs(struct fw_unit *unit) +static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) { - struct fw_device *device = fw_device(unit->device.parent); - struct sbp2_device *sd = unit->device.driver_data; + struct fw_device *device = fw_device(lu->tgt->unit->device.parent); struct sbp2_orb *orb, *next; struct list_head list; unsigned long flags; @@ -407,7 +421,7 @@ static int sbp2_cancel_orbs(struct fw_unit *unit) INIT_LIST_HEAD(&list); spin_lock_irqsave(&device->card->lock, flags); - list_splice_init(&sd->orb_list, &list); + list_splice_init(&lu->orb_list, &list); spin_unlock_irqrestore(&device->card->lock, flags); list_for_each_entry_safe(orb, next, &list, link) { @@ -434,11 +448,11 @@ complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) } static int -sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, - int function, int lun, void *response) +sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id, + int generation, int function, int lun_or_login_id, + void *response) { - struct fw_device *device = fw_device(unit->device.parent); - struct sbp2_device *sd = unit->device.driver_data; + struct fw_device *device = fw_device(lu->tgt->unit->device.parent); struct sbp2_management_orb *orb; int retval = -ENOMEM; @@ -459,12 +473,12 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, orb->request.misc = MANAGEMENT_ORB_NOTIFY | MANAGEMENT_ORB_FUNCTION(function) | - MANAGEMENT_ORB_LUN(lun); + MANAGEMENT_ORB_LUN(lun_or_login_id); orb->request.length = MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)); - orb->request.status_fifo.high = sd->address_handler.offset >> 32; - orb->request.status_fifo.low = sd->address_handler.offset; + orb->request.status_fifo.high = lu->address_handler.offset >> 32; + orb->request.status_fifo.low = lu->address_handler.offset; if (function == SBP2_LOGIN_REQUEST) { orb->request.misc |= @@ -483,14 +497,14 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, if (dma_mapping_error(orb->base.request_bus)) goto fail_mapping_request; - sbp2_send_orb(&orb->base, unit, - node_id, generation, sd->management_agent_address); + sbp2_send_orb(&orb->base, lu, node_id, generation, + lu->tgt->management_agent_address); wait_for_completion_timeout(&orb->done, msecs_to_jiffies(SBP2_ORB_TIMEOUT)); retval = -EIO; - if (sbp2_cancel_orbs(unit) == 0) { + if (sbp2_cancel_orbs(lu) == 0) { fw_error("orb reply timed out, rcode=0x%02x\n", orb->base.rcode); goto out; @@ -535,10 +549,9 @@ complete_agent_reset_write(struct fw_card *card, int rcode, kfree(t); } -static int sbp2_agent_reset(struct fw_unit *unit) +static int sbp2_agent_reset(struct sbp2_logical_unit *lu) { - struct fw_device *device = fw_device(unit->device.parent); - struct sbp2_device *sd = unit->device.driver_data; + struct fw_device *device = fw_device(lu->tgt->unit->device.parent); struct fw_transaction *t; static u32 zero; @@ -547,181 +560,261 @@ static int sbp2_agent_reset(struct fw_unit *unit) return -ENOMEM; fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, - sd->node_id, sd->generation, device->max_speed, - sd->command_block_agent_address + SBP2_AGENT_RESET, + lu->tgt->node_id, lu->generation, device->max_speed, + lu->command_block_agent_address + SBP2_AGENT_RESET, &zero, sizeof(zero), complete_agent_reset_write, t); return 0; } -static void sbp2_reconnect(struct work_struct *work); -static struct scsi_host_template scsi_driver_template; - -static void release_sbp2_device(struct kref *kref) +static void sbp2_release_target(struct kref *kref) { - struct sbp2_device *sd = container_of(kref, struct sbp2_device, kref); - struct Scsi_Host *host = - container_of((void *)sd, struct Scsi_Host, hostdata[0]); - - scsi_remove_host(host); - sbp2_send_management_orb(sd->unit, sd->node_id, sd->generation, - SBP2_LOGOUT_REQUEST, sd->login_id, NULL); - fw_core_remove_address_handler(&sd->address_handler); - fw_notify("removed sbp2 unit %s\n", sd->unit->device.bus_id); - put_device(&sd->unit->device); - scsi_host_put(host); + struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref); + struct sbp2_logical_unit *lu, *next; + struct Scsi_Host *shost = + container_of((void *)tgt, struct Scsi_Host, hostdata[0]); + + list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { + if (lu->sdev) + scsi_remove_device(lu->sdev); + + sbp2_send_management_orb(lu, tgt->node_id, lu->generation, + SBP2_LOGOUT_REQUEST, lu->login_id, NULL); + fw_core_remove_address_handler(&lu->address_handler); + list_del(&lu->link); + kfree(lu); + } + scsi_remove_host(shost); + fw_notify("released %s\n", tgt->unit->device.bus_id); + + put_device(&tgt->unit->device); + scsi_host_put(shost); } +static void sbp2_reconnect(struct work_struct *work); + static void sbp2_login(struct work_struct *work) { - struct sbp2_device *sd = - container_of(work, struct sbp2_device, work.work); - struct Scsi_Host *host = - container_of((void *)sd, struct Scsi_Host, hostdata[0]); - struct fw_unit *unit = sd->unit; + struct sbp2_logical_unit *lu = + container_of(work, struct sbp2_logical_unit, work.work); + struct Scsi_Host *shost = + container_of((void *)lu->tgt, struct Scsi_Host, hostdata[0]); + struct scsi_device *sdev; + struct scsi_lun eight_bytes_lun; + struct fw_unit *unit = lu->tgt->unit; struct fw_device *device = fw_device(unit->device.parent); struct sbp2_login_response response; - int generation, node_id, local_node_id, lun, retval; - - /* FIXME: Make this work for multi-lun devices. */ - lun = 0; + int generation, node_id, local_node_id; generation = device->card->generation; node_id = device->node->node_id; local_node_id = device->card->local_node->node_id; - if (sbp2_send_management_orb(unit, node_id, generation, - SBP2_LOGIN_REQUEST, lun, &response) < 0) { - if (sd->retries++ < 5) { - schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); + if (sbp2_send_management_orb(lu, node_id, generation, + SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { + if (lu->retries++ < 5) { + schedule_delayed_work(&lu->work, DIV_ROUND_UP(HZ, 5)); } else { - fw_error("failed to login to %s\n", - unit->device.bus_id); - kref_put(&sd->kref, release_sbp2_device); + fw_error("failed to login to %s LUN %04x\n", + unit->device.bus_id, lu->lun); + kref_put(&lu->tgt->kref, sbp2_release_target); } return; } - sd->generation = generation; - sd->node_id = node_id; - sd->address_high = local_node_id << 16; + lu->generation = generation; + lu->tgt->node_id = node_id; + lu->tgt->address_high = local_node_id << 16; /* Get command block agent offset and login id. */ - sd->command_block_agent_address = + lu->command_block_agent_address = ((u64) (response.command_block_agent.high & 0xffff) << 32) | response.command_block_agent.low; - sd->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response); + lu->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response); - fw_notify("logged in to sbp2 unit %s (%d retries)\n", - unit->device.bus_id, sd->retries); - fw_notify(" - management_agent_address: 0x%012llx\n", - (unsigned long long) sd->management_agent_address); - fw_notify(" - command_block_agent_address: 0x%012llx\n", - (unsigned long long) sd->command_block_agent_address); - fw_notify(" - status write address: 0x%012llx\n", - (unsigned long long) sd->address_handler.offset); + fw_notify("logged in to %s LUN %04x (%d retries)\n", + unit->device.bus_id, lu->lun, lu->retries); #if 0 /* FIXME: The linux1394 sbp2 does this last step. */ sbp2_set_busy_timeout(scsi_id); #endif - PREPARE_DELAYED_WORK(&sd->work, sbp2_reconnect); - sbp2_agent_reset(unit); + PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect); + sbp2_agent_reset(lu); + + memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); + eight_bytes_lun.scsi_lun[0] = (lu->lun >> 8) & 0xff; + eight_bytes_lun.scsi_lun[1] = lu->lun & 0xff; - /* FIXME: Loop over luns here. */ - lun = 0; - retval = scsi_add_device(host, 0, 0, lun); - if (retval < 0) { - sbp2_send_management_orb(unit, sd->node_id, sd->generation, - SBP2_LOGOUT_REQUEST, sd->login_id, - NULL); + sdev = __scsi_add_device(shost, 0, 0, + scsilun_to_int(&eight_bytes_lun), lu); + if (IS_ERR(sdev)) { + sbp2_send_management_orb(lu, node_id, generation, + SBP2_LOGOUT_REQUEST, lu->login_id, NULL); /* * Set this back to sbp2_login so we fall back and * retry login on bus reset. */ - PREPARE_DELAYED_WORK(&sd->work, sbp2_login); + PREPARE_DELAYED_WORK(&lu->work, sbp2_login); + } else { + lu->sdev = sdev; + scsi_device_put(sdev); } - kref_put(&sd->kref, release_sbp2_device); + kref_put(&lu->tgt->kref, sbp2_release_target); } -static int sbp2_probe(struct device *dev) +static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) { - struct fw_unit *unit = fw_unit(dev); - struct fw_device *device = fw_device(unit->device.parent); - struct sbp2_device *sd; - struct fw_csr_iterator ci; - struct Scsi_Host *host; - int i, key, value, err; - u32 model, firmware_revision; + struct sbp2_logical_unit *lu; - err = -ENOMEM; - host = scsi_host_alloc(&scsi_driver_template, sizeof(*sd)); - if (host == NULL) - goto fail; + lu = kmalloc(sizeof(*lu), GFP_KERNEL); + if (!lu) + return -ENOMEM; - sd = (struct sbp2_device *) host->hostdata; - unit->device.driver_data = sd; - sd->unit = unit; - INIT_LIST_HEAD(&sd->orb_list); - kref_init(&sd->kref); + lu->address_handler.length = 0x100; + lu->address_handler.address_callback = sbp2_status_write; + lu->address_handler.callback_data = lu; - sd->address_handler.length = 0x100; - sd->address_handler.address_callback = sbp2_status_write; - sd->address_handler.callback_data = sd; + if (fw_core_add_address_handler(&lu->address_handler, + &fw_high_memory_region) < 0) { + kfree(lu); + return -ENOMEM; + } - err = fw_core_add_address_handler(&sd->address_handler, - &fw_high_memory_region); - if (err < 0) - goto fail_host; + lu->tgt = tgt; + lu->sdev = NULL; + lu->lun = lun_entry & 0xffff; + lu->retries = 0; + INIT_LIST_HEAD(&lu->orb_list); + INIT_DELAYED_WORK(&lu->work, sbp2_login); - err = fw_device_enable_phys_dma(device); - if (err < 0) - goto fail_address_handler; + list_add_tail(&lu->link, &tgt->lu_list); + return 0; +} - err = scsi_add_host(host, &unit->device); - if (err < 0) - goto fail_address_handler; +static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory) +{ + struct fw_csr_iterator ci; + int key, value; - /* - * Scan unit directory to get management agent address, - * firmware revison and model. Initialize firmware_revision - * and model to values that wont match anything in our table. - */ - firmware_revision = 0xff000000; - model = 0xff000000; - fw_csr_iterator_init(&ci, unit->directory); + fw_csr_iterator_init(&ci, directory); + while (fw_csr_iterator_next(&ci, &key, &value)) + if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && + sbp2_add_logical_unit(tgt, value) < 0) + return -ENOMEM; + return 0; +} + +static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory, + u32 *model, u32 *firmware_revision) +{ + struct fw_csr_iterator ci; + int key, value; + + fw_csr_iterator_init(&ci, directory); while (fw_csr_iterator_next(&ci, &key, &value)) { switch (key) { + case CSR_DEPENDENT_INFO | CSR_OFFSET: - sd->management_agent_address = - 0xfffff0000000ULL + 4 * value; + tgt->management_agent_address = + CSR_REGISTER_BASE + 4 * value; break; - case SBP2_FIRMWARE_REVISION: - firmware_revision = value; + + case CSR_DIRECTORY_ID: + tgt->directory_id = value; break; + case CSR_MODEL: - model = value; + *model = value; + break; + + case SBP2_CSR_FIRMWARE_REVISION: + *firmware_revision = value; + break; + + case SBP2_CSR_LOGICAL_UNIT_NUMBER: + if (sbp2_add_logical_unit(tgt, value) < 0) + return -ENOMEM; + break; + + case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: + if (sbp2_scan_logical_unit_dir(tgt, ci.p + value) < 0) + return -ENOMEM; break; } } + return 0; +} + +static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, + u32 firmware_revision) +{ + int i; + + tgt->workarounds = 0; for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { + if (sbp2_workarounds_table[i].firmware_revision != (firmware_revision & 0xffffff00)) continue; + if (sbp2_workarounds_table[i].model != model && sbp2_workarounds_table[i].model != ~0) continue; - sd->workarounds |= sbp2_workarounds_table[i].workarounds; + + tgt->workarounds |= sbp2_workarounds_table[i].workarounds; break; } - if (sd->workarounds) - fw_notify("Workarounds for node %s: 0x%x " + if (tgt->workarounds) + fw_notify("Workarounds for %s: 0x%x " "(firmware_revision 0x%06x, model_id 0x%06x)\n", - unit->device.bus_id, - sd->workarounds, firmware_revision, model); + tgt->unit->device.bus_id, + tgt->workarounds, firmware_revision, model); +} + +static struct scsi_host_template scsi_driver_template; + +static int sbp2_probe(struct device *dev) +{ + struct fw_unit *unit = fw_unit(dev); + struct fw_device *device = fw_device(unit->device.parent); + struct sbp2_target *tgt; + struct sbp2_logical_unit *lu; + struct Scsi_Host *shost; + u32 model, firmware_revision; + + shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); + if (shost == NULL) + return -ENOMEM; + + tgt = (struct sbp2_target *)shost->hostdata; + unit->device.driver_data = tgt; + tgt->unit = unit; + kref_init(&tgt->kref); + INIT_LIST_HEAD(&tgt->lu_list); + + if (fw_device_enable_phys_dma(device) < 0) + goto fail_shost_put; + + if (scsi_add_host(shost, &unit->device) < 0) + goto fail_shost_put; + + /* Initialize to values that won't match anything in our table. */ + firmware_revision = 0xff000000; + model = 0xff000000; + + /* implicit directory ID */ + tgt->directory_id = ((unit->directory - device->config_rom) * 4 + + CSR_CONFIG_ROM) & 0xffffff; + + if (sbp2_scan_unit_dir(tgt, unit->directory, &model, + &firmware_revision) < 0) + goto fail_tgt_put; + + sbp2_init_workarounds(tgt, model, firmware_revision); get_device(&unit->device); @@ -730,35 +823,34 @@ static int sbp2_probe(struct device *dev) * reschedule retries. Always get the ref before scheduling * work. */ - INIT_DELAYED_WORK(&sd->work, sbp2_login); - if (schedule_delayed_work(&sd->work, 0)) - kref_get(&sd->kref); - + list_for_each_entry(lu, &tgt->lu_list, link) + if (schedule_delayed_work(&lu->work, 0)) + kref_get(&tgt->kref); return 0; - fail_address_handler: - fw_core_remove_address_handler(&sd->address_handler); - fail_host: - scsi_host_put(host); - fail: - return err; + fail_tgt_put: + kref_put(&tgt->kref, sbp2_release_target); + return -ENOMEM; + + fail_shost_put: + scsi_host_put(shost); + return -ENOMEM; } static int sbp2_remove(struct device *dev) { struct fw_unit *unit = fw_unit(dev); - struct sbp2_device *sd = unit->device.driver_data; - - kref_put(&sd->kref, release_sbp2_device); + struct sbp2_target *tgt = unit->device.driver_data; + kref_put(&tgt->kref, sbp2_release_target); return 0; } static void sbp2_reconnect(struct work_struct *work) { - struct sbp2_device *sd = - container_of(work, struct sbp2_device, work.work); - struct fw_unit *unit = sd->unit; + struct sbp2_logical_unit *lu = + container_of(work, struct sbp2_logical_unit, work.work); + struct fw_unit *unit = lu->tgt->unit; struct fw_device *device = fw_device(unit->device.parent); int generation, node_id, local_node_id; @@ -766,40 +858,49 @@ static void sbp2_reconnect(struct work_struct *work) node_id = device->node->node_id; local_node_id = device->card->local_node->node_id; - if (sbp2_send_management_orb(unit, node_id, generation, + if (sbp2_send_management_orb(lu, node_id, generation, SBP2_RECONNECT_REQUEST, - sd->login_id, NULL) < 0) { - if (sd->retries++ >= 5) { + lu->login_id, NULL) < 0) { + if (lu->retries++ >= 5) { fw_error("failed to reconnect to %s\n", unit->device.bus_id); /* Fall back and try to log in again. */ - sd->retries = 0; - PREPARE_DELAYED_WORK(&sd->work, sbp2_login); + lu->retries = 0; + PREPARE_DELAYED_WORK(&lu->work, sbp2_login); } - schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); + schedule_delayed_work(&lu->work, DIV_ROUND_UP(HZ, 5)); return; } - sd->generation = generation; - sd->node_id = node_id; - sd->address_high = local_node_id << 16; + lu->generation = generation; + lu->tgt->node_id = node_id; + lu->tgt->address_high = local_node_id << 16; - fw_notify("reconnected to unit %s (%d retries)\n", - unit->device.bus_id, sd->retries); - sbp2_agent_reset(unit); - sbp2_cancel_orbs(unit); - kref_put(&sd->kref, release_sbp2_device); + fw_notify("reconnected to %s LUN %04x (%d retries)\n", + unit->device.bus_id, lu->lun, lu->retries); + + sbp2_agent_reset(lu); + sbp2_cancel_orbs(lu); + + kref_put(&lu->tgt->kref, sbp2_release_target); } static void sbp2_update(struct fw_unit *unit) { - struct fw_device *device = fw_device(unit->device.parent); - struct sbp2_device *sd = unit->device.driver_data; + struct sbp2_target *tgt = unit->device.driver_data; + struct sbp2_logical_unit *lu; - sd->retries = 0; - fw_device_enable_phys_dma(device); - if (schedule_delayed_work(&sd->work, 0)) - kref_get(&sd->kref); + fw_device_enable_phys_dma(fw_device(unit->device.parent)); + + /* + * Fw-core serializes sbp2_update() against sbp2_remove(). + * Iteration over tgt->lu_list is therefore safe here. + */ + list_for_each_entry(lu, &tgt->lu_list, link) { + lu->retries = 0; + if (schedule_delayed_work(&lu->work, 0)) + kref_get(&tgt->kref); + } } #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e @@ -869,13 +970,12 @@ complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) { struct sbp2_command_orb *orb = container_of(base_orb, struct sbp2_command_orb, base); - struct fw_unit *unit = orb->unit; - struct fw_device *device = fw_device(unit->device.parent); + struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent); int result; if (status != NULL) { if (STATUS_GET_DEAD(*status)) - sbp2_agent_reset(unit); + sbp2_agent_reset(orb->lu); switch (STATUS_GET_RESPONSE(*status)) { case SBP2_STATUS_REQUEST_COMPLETE: @@ -919,12 +1019,10 @@ complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) orb->done(orb->cmd); } -static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) +static int +sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device, + struct sbp2_logical_unit *lu) { - struct sbp2_device *sd = - (struct sbp2_device *)orb->cmd->device->host->hostdata; - struct fw_unit *unit = sd->unit; - struct fw_device *device = fw_device(unit->device.parent); struct scatterlist *sg; int sg_len, l, i, j, count; dma_addr_t sg_addr; @@ -943,10 +1041,9 @@ static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) * tables. */ if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { - orb->request.data_descriptor.high = sd->address_high; + orb->request.data_descriptor.high = lu->tgt->address_high; orb->request.data_descriptor.low = sg_dma_address(sg); - orb->request.misc |= - COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)); + orb->request.misc |= COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)); return 0; } @@ -990,7 +1087,7 @@ static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) * initiator (i.e. us), but data_descriptor can refer to data * on other nodes so we need to put our ID in descriptor.high. */ - orb->request.data_descriptor.high = sd->address_high; + orb->request.data_descriptor.high = lu->tgt->address_high; orb->request.data_descriptor.low = orb->page_table_bus; orb->request.misc |= COMMAND_ORB_PAGE_TABLE_PRESENT | @@ -1009,12 +1106,11 @@ static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) { - struct sbp2_device *sd = - (struct sbp2_device *)cmd->device->host->hostdata; - struct fw_unit *unit = sd->unit; - struct fw_device *device = fw_device(unit->device.parent); + struct sbp2_logical_unit *lu = cmd->device->hostdata; + struct fw_device *device = fw_device(lu->tgt->unit->device.parent); struct sbp2_command_orb *orb; unsigned max_payload; + int retval = SCSI_MLQUEUE_HOST_BUSY; /* * Bidirectional commands are not yet implemented, and unknown @@ -1030,14 +1126,14 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) orb = kzalloc(sizeof(*orb), GFP_ATOMIC); if (orb == NULL) { fw_notify("failed to alloc orb\n"); - goto fail_alloc; + return SCSI_MLQUEUE_HOST_BUSY; } /* Initialize rcode to something not RCODE_COMPLETE. */ orb->base.rcode = -1; kref_init(&orb->base.kref); - orb->unit = unit; + orb->lu = lu; orb->done = done; orb->cmd = cmd; @@ -1063,8 +1159,8 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) orb->request.misc |= COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA); - if (scsi_sg_count(cmd) && sbp2_command_orb_map_scatterlist(orb) < 0) - goto fail_mapping; + if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) + goto out; fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); @@ -1077,49 +1173,47 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) dma_map_single(device->card->device, &orb->request, sizeof(orb->request), DMA_TO_DEVICE); if (dma_mapping_error(orb->base.request_bus)) - goto fail_mapping; - - sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation, - sd->command_block_agent_address + SBP2_ORB_POINTER); - - kref_put(&orb->base.kref, free_orb); - return 0; + goto out; - fail_mapping: + sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, lu->generation, + lu->command_block_agent_address + SBP2_ORB_POINTER); + retval = 0; + out: kref_put(&orb->base.kref, free_orb); - fail_alloc: - return SCSI_MLQUEUE_HOST_BUSY; + return retval; } static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) { - struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata; + struct sbp2_logical_unit *lu = sdev->hostdata; sdev->allow_restart = 1; - if (sd->workarounds & SBP2_WORKAROUND_INQUIRY_36) + if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) sdev->inquiry_len = 36; + return 0; } static int sbp2_scsi_slave_configure(struct scsi_device *sdev) { - struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata; - struct fw_unit *unit = sd->unit; + struct sbp2_logical_unit *lu = sdev->hostdata; sdev->use_10_for_rw = 1; if (sdev->type == TYPE_ROM) sdev->use_10_for_ms = 1; + if (sdev->type == TYPE_DISK && - sd->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) + lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) sdev->skip_ms_page_8 = 1; - if (sd->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) { - fw_notify("setting fix_capacity for %s\n", unit->device.bus_id); + + if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) sdev->fix_capacity = 1; - } - if (sd->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) + + if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); + return 0; } @@ -1129,13 +1223,11 @@ static int sbp2_scsi_slave_configure(struct scsi_device *sdev) */ static int sbp2_scsi_abort(struct scsi_cmnd *cmd) { - struct sbp2_device *sd = - (struct sbp2_device *)cmd->device->host->hostdata; - struct fw_unit *unit = sd->unit; + struct sbp2_logical_unit *lu = cmd->device->hostdata; fw_notify("sbp2_scsi_abort\n"); - sbp2_agent_reset(unit); - sbp2_cancel_orbs(unit); + sbp2_agent_reset(lu); + sbp2_cancel_orbs(lu); return SUCCESS; } @@ -1152,37 +1244,18 @@ sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); - struct sbp2_device *sd; - struct fw_unit *unit; + struct sbp2_logical_unit *lu; struct fw_device *device; - u32 directory_id; - struct fw_csr_iterator ci; - int key, value, lun; if (!sdev) return 0; - sd = (struct sbp2_device *)sdev->host->hostdata; - unit = sd->unit; - device = fw_device(unit->device.parent); - - /* implicit directory ID */ - directory_id = ((unit->directory - device->config_rom) * 4 - + CSR_CONFIG_ROM) & 0xffffff; - - /* explicit directory ID, overrides implicit ID if present */ - fw_csr_iterator_init(&ci, unit->directory); - while (fw_csr_iterator_next(&ci, &key, &value)) - if (key == CSR_DIRECTORY_ID) { - directory_id = value; - break; - } - /* FIXME: Make this work for multi-lun devices. */ - lun = 0; + lu = sdev->hostdata; + device = fw_device(lu->tgt->unit->device.parent); return sprintf(buf, "%08x%08x:%06x:%04x\n", device->config_rom[3], device->config_rom[4], - directory_id, lun); + lu->tgt->directory_id, lu->lun); } static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); commit 1b34e97441384d527c438a6ee597bfc800373bce Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Sat Aug 25 10:40:42 2007 +0200 firewire: fw-sbp2: always enable IRQs before calling command ORB callback On IOMMU-less noncoherent architectures, orb->callback will memcpy the whole SCSI command buffer for READ-like SCSI commands. It is therefore friendlier to enable IRQs before the call, like before patch "Add ref-counting for sbp2 orbs". Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Acked-by: Kristian Høgsberg <krh@redhat.com> diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c index 238730f..7ecc154 100644 --- a/drivers/firewire/fw-sbp2.c +++ b/drivers/firewire/fw-sbp2.c @@ -361,11 +361,12 @@ complete_transaction(struct fw_card *card, int rcode, orb->rcode = rcode; if (orb->rcode != RCODE_COMPLETE) { list_del(&orb->link); + spin_unlock_irqrestore(&card->lock, flags); orb->callback(orb, NULL); + } else { + spin_unlock_irqrestore(&card->lock, flags); } - spin_unlock_irqrestore(&card->lock, flags); - kref_put(&orb->kref, free_orb); } commit 930e4b7fe3b4e1c4e14b9c22e4c9c74dc8db75f3 Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Fri Aug 3 20:56:31 2007 +0200 firewire: fw-core: local variable shadows a global one Sparse warned about it although it was apparently harmless: drivers/firewire/fw-cdev.c:624:23: warning: symbol 'interrupt' shadows an earlier one include/asm/hw_irq.h:29:13: originally declared here Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c index 0647130..b960fd9 100644 --- a/drivers/firewire/fw-cdev.c +++ b/drivers/firewire/fw-cdev.c @@ -621,20 +621,19 @@ iso_callback(struct fw_iso_context *context, u32 cycle, size_t header_length, void *header, void *data) { struct client *client = data; - struct iso_interrupt *interrupt; + struct iso_interrupt *irq; - interrupt = kzalloc(sizeof(*interrupt) + header_length, GFP_ATOMIC); - if (interrupt == NULL) + irq = kzalloc(sizeof(*irq) + header_length, GFP_ATOMIC); + if (irq == NULL) return; - interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; - interrupt->interrupt.closure = client->iso_closure; - interrupt->interrupt.cycle = cycle; - interrupt->interrupt.header_length = header_length; - memcpy(interrupt->interrupt.header, header, header_length); - queue_event(client, &interrupt->event, - &interrupt->interrupt, - sizeof(interrupt->interrupt) + header_length, NULL, 0); + irq->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; + irq->interrupt.closure = client->iso_closure; + irq->interrupt.cycle = cycle; + irq->interrupt.header_length = header_length; + memcpy(irq->interrupt.header, header, header_length); + queue_event(client, &irq->event, &irq->interrupt, + sizeof(irq->interrupt) + header_length, NULL, 0); } static int ioctl_create_iso_context(struct client *client, void *buffer) commit 1415d9189e8c59aa9c77a3bba419dcea062c145f Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Tue Jul 17 02:10:16 2007 +0200 firewire: optimize fw_core_add_address_handler Potentially avoids unnecessary loop runs. Guarantee quadlet-aligned starts of address regions. Document the return values. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c index 3e1cb12..9959b79 100644 --- a/drivers/firewire/fw-transaction.c +++ b/drivers/firewire/fw-transaction.c @@ -410,7 +410,12 @@ EXPORT_SYMBOL(fw_unit_space_region); * controller. When a request is received that falls within the * specified address range, the specified callback is invoked. The * parameters passed to the callback give the details of the - * particular request + * particular request. + * + * Return value: 0 on success, non-zero otherwise. + * The start offset of the handler's address region is determined by + * fw_core_add_address_handler() and is returned in handler->offset. + * The offset is quadlet-aligned. */ int fw_core_add_address_handler(struct fw_address_handler *handler, @@ -422,14 +427,15 @@ fw_core_add_address_handler(struct fw_address_handler *handler, spin_lock_irqsave(&address_handler_lock, flags); - handler->offset = region->start; + handler->offset = roundup(region->start, 4); while (handler->offset + handler->length <= region->end) { other = lookup_overlapping_address_handler(&address_handler_list, handler->offset, handler->length); if (other != NULL) { - handler->offset += other->length; + handler->offset = + roundup(other->offset + other->length, 4); } else { list_add_tail(&handler->link, &address_handler_list); ret = 0; commit 002a98f14720f90b107e8c44b7733f9bd5dff728 Author: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Date: Fri Oct 12 19:57:23 2007 +0200 ieee1394: ieee1394_core.c: use DEFINE_SPINLOCK for spinlock definition drivers/ieee1394/ieee1394_core.c: Define spinlock using DEFINE_SPINLOCK instead of assignment to SPIN_LOCK_UNLOCKED Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/ieee1394/ieee1394_core.c b/drivers/ieee1394/ieee1394_core.c index 98fd985..36c747b 100644 --- a/drivers/ieee1394/ieee1394_core.c +++ b/drivers/ieee1394/ieee1394_core.c @@ -488,7 +488,7 @@ void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot) highlevel_host_reset(host); } -static spinlock_t pending_packets_lock = SPIN_LOCK_UNLOCKED; +static DEFINE_SPINLOCK(pending_packets_lock); /** * hpsb_packet_sent - notify core of sending a packet commit 17a19b795e9187d65b6e45cb22797725d50f7edb Author: Stefan Richter <stefanr@s5r6.in-berlin.de> Date: Sat Sep 15 14:50:25 2007 +0200 ieee1394: csr1212: proper refcounting At least since nodemgr got rid of coarse global locking, accesses to struct csr1212_keyval's reference counter should be atomic and coupled with proper barriers. Also, calls to csr1212_keep_keyval(kv) should occur before kv is being used. (We probably should convert refcnt to struct kref, but how to keep csr1212_destroy_keyval's implementation non-recursively then?) Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> diff --git a/drivers/ieee1394/csr1212.c b/drivers/ieee1394/csr1212.c index d08166b..e8122de 100644 --- a/drivers/ieee1394/csr1212.c +++ b/drivers/ieee1394/csr1212.c @@ -218,12 +218,10 @@ static struct csr1212_keyval *csr1212_new_keyval(u8 type, u8 key) if (!kv) return NULL; + atomic_set(&kv->refcnt, 1); kv->key.type = type; kv->key.id = key; - kv->associate = NULL; - kv->refcnt = 1; - kv->next = NULL; kv->prev = NULL; kv->offset = 0; @@ -326,12 +324,13 @@ void csr1212_associate_keyval(struct csr1212_keyval *kv, if (kv->associate) csr1212_release_keyval(kv->associate); - associate->refcnt++; + csr1212_keep_keyval(associate); kv->associate = associate; } -int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir, - struct csr1212_keyval *kv) +static int __csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir, + struct csr1212_keyval *kv, + bool keep_keyval) { struct csr1212_dentry *dentry; @@ -341,10 +340,10 @@ int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir, if (!dentry) return -ENOMEM; + if (keep_keyval) + csr1212_keep_keyval(kv); dentry->kv = kv; - kv->refcnt++; - dentry->next = NULL; dentry->prev = dir->value.directory.dentries_tail; @@ -358,6 +357,12 @@ int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir, return CSR1212_SUCCESS; } +int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir, + struct csr1212_keyval *kv) +{ + return __csr1212_attach_keyval_to_directory(dir, kv, true); +} + #define CSR1212_DESCRIPTOR_LEAF_DATA(kv) \ (&((kv)->value.leaf.data[1])) @@ -483,15 +488,18 @@ void csr1212_detach_keyval_from_directory(struct csr1212_keyval *dir, /* This function is used to free the memory taken by a keyval. If the given * keyval is a directory type, then any keyvals contained in that directory - * will be destroyed as well if their respective refcnts are 0. By means of + * will be destroyed as well if noone holds a reference on them. By means of * list manipulation, this routine will descend a directory structure in a * non-recursive manner. */ -static void csr1212_destroy_keyval(struct csr1212_keyval *kv) +void csr1212_release_keyval(struct csr1212_keyval *kv) { struct csr1212_keyval *k, *a; struct csr1212_dentry dentry; struct csr1212_dentry *head, *tail; + if (!atomic_dec_and_test(&kv->refcnt)) + return; + dentry.kv = kv; dentry.next = NULL; dentry.prev = NULL; @@ -503,9 +511,8 @@ static void csr1212_destroy_keyval(struct csr1212_keyval *kv) k = head->kv; while (k) { - k->refcnt--; - - if (k->refcnt > 0) + /* must not dec_and_test kv->refcnt again */ + if (k != kv && !atomic_dec_and_test(&k->refcnt)) break;
| Greg Kroah-Hartman | [PATCH 004/196] Chinese: add translation of SubmittingPatches |
| Tarkan Erimer | Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3 |
| Matt Mackall | Re: [PATCH] x86: fix unconditional arch/x86/kernel/pcspeaker.c compiling |
| James Bottomley | Re: Integration of SCST in the mainstream Linux kernel |
| Gerrit Renker | [PATCH 27/37] dccp: Integration of dynamic feature activation - part 2 (server side) |
| David Miller | [GIT]: Networking |
| Jarek Poplawski | [PATCH] pkt_sched: Destroy gen estimators under rtnl_lock(). |
| Natalie Protasevich | [BUG] New Kernel Bugs |
git: | |
