diff options
Diffstat (limited to 'drivers')
29 files changed, 1200 insertions, 1133 deletions
diff --git a/drivers/ieee1394/Kconfig b/drivers/ieee1394/Kconfig index 186737539cf..2769e505f05 100644 --- a/drivers/ieee1394/Kconfig +++ b/drivers/ieee1394/Kconfig @@ -120,12 +120,19 @@ config IEEE1394_VIDEO1394 this option only if you have an IEEE 1394 video device connected to an OHCI-1394 card. +comment "SBP-2 support (for storage devices) requires SCSI" + depends on IEEE1394 && SCSI=n + config IEEE1394_SBP2 tristate "SBP-2 support (Harddisks etc.)" depends on IEEE1394 && SCSI && (PCI || BROKEN) help - This option enables you to use SBP-2 devices connected to your IEEE - 1394 bus. SBP-2 devices include harddrives and DVD devices. + This option enables you to use SBP-2 devices connected to an IEEE + 1394 bus. SBP-2 devices include storage devices like harddisks and + DVD drives, also some other FireWire devices like scanners. + + You should also enable support for disks, CD-ROMs, etc. in the SCSI + configuration section. config IEEE1394_SBP2_PHYS_DMA bool "Enable replacement for physical DMA in SBP2" diff --git a/drivers/ieee1394/csr.c b/drivers/ieee1394/csr.c index 149573db91c..ab0c80f61b9 100644 --- a/drivers/ieee1394/csr.c +++ b/drivers/ieee1394/csr.c @@ -17,11 +17,13 @@ * */ -#include <linux/string.h> +#include <linux/jiffies.h> +#include <linux/kernel.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/param.h> #include <linux/spinlock.h> +#include <linux/string.h> #include "csr1212.h" #include "ieee1394_types.h" @@ -149,31 +151,18 @@ static void host_reset(struct hpsb_host *host) /* * HI == seconds (bits 0:2) - * LO == fraction units of 1/8000 of a second, as per 1394 (bits 19:31) - * - * Convert to units and then to HZ, for comparison to jiffies. - * - * By default this will end up being 800 units, or 100ms (125usec per - * unit). + * LO == fractions of a second in units of 125usec (bits 19:31) * - * NOTE: The spec says 1/8000, but also says we can compute based on 1/8192 - * like CSR specifies. Should make our math less complex. + * Convert SPLIT_TIMEOUT to jiffies. + * The default and minimum as per 1394a-2000 clause 8.3.2.2.6 is 100ms. */ static inline void calculate_expire(struct csr_control *csr) { - unsigned long units; - - /* Take the seconds, and convert to units */ - units = (unsigned long)(csr->split_timeout_hi & 0x07) << 13; - - /* Add in the fractional units */ - units += (unsigned long)(csr->split_timeout_lo >> 19); - - /* Convert to jiffies */ - csr->expire = (unsigned long)(units * HZ) >> 13UL; + unsigned long usecs = + (csr->split_timeout_hi & 0x07) * USEC_PER_SEC + + (csr->split_timeout_lo >> 19) * 125L; - /* Just to keep from rounding low */ - csr->expire++; + csr->expire = usecs_to_jiffies(usecs > 100000L ? usecs : 100000L); HPSB_VERBOSE("CSR: setting expire to %lu, HZ=%u", csr->expire, HZ); } diff --git a/drivers/ieee1394/csr.h b/drivers/ieee1394/csr.h index ea9aa4f53ab..f11546550d8 100644 --- a/drivers/ieee1394/csr.h +++ b/drivers/ieee1394/csr.h @@ -1,75 +1,73 @@ - #ifndef _IEEE1394_CSR_H #define _IEEE1394_CSR_H -#ifdef CONFIG_PREEMPT -#include <linux/sched.h> -#endif +#include <linux/spinlock_types.h> #include "csr1212.h" +#include "ieee1394_types.h" -#define CSR_REGISTER_BASE 0xfffff0000000ULL +#define CSR_REGISTER_BASE 0xfffff0000000ULL /* register offsets relative to CSR_REGISTER_BASE */ -#define CSR_STATE_CLEAR 0x0 -#define CSR_STATE_SET 0x4 -#define CSR_NODE_IDS 0x8 -#define CSR_RESET_START 0xc -#define CSR_SPLIT_TIMEOUT_HI 0x18 -#define CSR_SPLIT_TIMEOUT_LO 0x1c -#define CSR_CYCLE_TIME 0x200 -#define CSR_BUS_TIME 0x204 -#define CSR_BUSY_TIMEOUT 0x210 -#define CSR_BUS_MANAGER_ID 0x21c -#define CSR_BANDWIDTH_AVAILABLE 0x220 -#define CSR_CHANNELS_AVAILABLE 0x224 -#define CSR_CHANNELS_AVAILABLE_HI 0x224 -#define CSR_CHANNELS_AVAILABLE_LO 0x228 -#define CSR_BROADCAST_CHANNEL 0x234 -#define CSR_CONFIG_ROM 0x400 -#define CSR_CONFIG_ROM_END 0x800 -#define CSR_FCP_COMMAND 0xB00 -#define CSR_FCP_RESPONSE 0xD00 -#define CSR_FCP_END 0xF00 -#define CSR_TOPOLOGY_MAP 0x1000 -#define CSR_TOPOLOGY_MAP_END 0x1400 -#define CSR_SPEED_MAP 0x2000 -#define CSR_SPEED_MAP_END 0x3000 +#define CSR_STATE_CLEAR 0x0 +#define CSR_STATE_SET 0x4 +#define CSR_NODE_IDS 0x8 +#define CSR_RESET_START 0xc +#define CSR_SPLIT_TIMEOUT_HI 0x18 +#define CSR_SPLIT_TIMEOUT_LO 0x1c +#define CSR_CYCLE_TIME 0x200 +#define CSR_BUS_TIME 0x204 +#define CSR_BUSY_TIMEOUT 0x210 +#define CSR_BUS_MANAGER_ID 0x21c +#define CSR_BANDWIDTH_AVAILABLE 0x220 +#define CSR_CHANNELS_AVAILABLE 0x224 +#define CSR_CHANNELS_AVAILABLE_HI 0x224 +#define CSR_CHANNELS_AVAILABLE_LO 0x228 +#define CSR_BROADCAST_CHANNEL 0x234 +#define CSR_CONFIG_ROM 0x400 +#define CSR_CONFIG_ROM_END 0x800 +#define CSR_FCP_COMMAND 0xB00 +#define CSR_FCP_RESPONSE 0xD00 +#define CSR_FCP_END 0xF00 +#define CSR_TOPOLOGY_MAP 0x1000 +#define CSR_TOPOLOGY_MAP_END 0x1400 +#define CSR_SPEED_MAP 0x2000 +#define CSR_SPEED_MAP_END 0x3000 /* IEEE 1394 bus specific Configuration ROM Key IDs */ #define IEEE1394_KV_ID_POWER_REQUIREMENTS (0x30) -/* IEEE 1394 Bus Inforamation Block specifics */ +/* IEEE 1394 Bus Information Block specifics */ #define CSR_BUS_INFO_SIZE (5 * sizeof(quadlet_t)) -#define CSR_IRMC_SHIFT 31 -#define CSR_CMC_SHIFT 30 -#define CSR_ISC_SHIFT 29 -#define CSR_BMC_SHIFT 28 -#define CSR_PMC_SHIFT 27 -#define CSR_CYC_CLK_ACC_SHIFT 16 -#define CSR_MAX_REC_SHIFT 12 -#define CSR_MAX_ROM_SHIFT 8 -#define CSR_GENERATION_SHIFT 4 +#define CSR_IRMC_SHIFT 31 +#define CSR_CMC_SHIFT 30 +#define CSR_ISC_SHIFT 29 +#define CSR_BMC_SHIFT 28 +#define CSR_PMC_SHIFT 27 +#define CSR_CYC_CLK_ACC_SHIFT 16 +#define CSR_MAX_REC_SHIFT 12 +#define CSR_MAX_ROM_SHIFT 8 +#define CSR_GENERATION_SHIFT 4 #define CSR_SET_BUS_INFO_GENERATION(csr, gen) \ ((csr)->bus_info_data[2] = \ cpu_to_be32((be32_to_cpu((csr)->bus_info_data[2]) & \ - ~(0xf << CSR_GENERATION_SHIFT)) | \ + ~(0xf << CSR_GENERATION_SHIFT)) | \ (gen) << CSR_GENERATION_SHIFT)) struct csr_control { - spinlock_t lock; - - quadlet_t state; - quadlet_t node_ids; - quadlet_t split_timeout_hi, split_timeout_lo; - unsigned long expire; // Calculated from split_timeout - quadlet_t cycle_time; - quadlet_t bus_time; - quadlet_t bus_manager_id; - quadlet_t bandwidth_available; - quadlet_t channels_available_hi, channels_available_lo; + spinlock_t lock; + + quadlet_t state; + quadlet_t node_ids; + quadlet_t split_timeout_hi, split_timeout_lo; + unsigned long expire; /* Calculated from split_timeout */ + quadlet_t cycle_time; + quadlet_t bus_time; + quadlet_t bus_manager_id; + quadlet_t bandwidth_available; + quadlet_t channels_available_hi, channels_available_lo; quadlet_t broadcast_channel; /* Bus Info */ @@ -84,8 +82,8 @@ struct csr_control { struct csr1212_csr *rom; - quadlet_t topology_map[256]; - quadlet_t speed_map[1024]; + quadlet_t topology_map[256]; + quadlet_t speed_map[1024]; }; extern struct csr1212_bus_ops csr_bus_ops; @@ -93,4 +91,9 @@ extern struct csr1212_bus_ops csr_bus_ops; int init_csr(void); void cleanup_csr(void); +/* hpsb_update_config_rom() is deprecated */ +struct hpsb_host; +int hpsb_update_config_rom(struct hpsb_host *host, const quadlet_t *new_rom, + size_t size, unsigned char rom_version); + #endif /* _IEEE1394_CSR_H */ diff --git a/drivers/ieee1394/dma.c b/drivers/ieee1394/dma.c index ca5167de707..c68f328e1a2 100644 --- a/drivers/ieee1394/dma.c +++ b/drivers/ieee1394/dma.c @@ -7,10 +7,13 @@ * directory of the kernel sources for details. */ +#include <linux/mm.h> #include <linux/module.h> -#include <linux/vmalloc.h> +#include <linux/pci.h> #include <linux/slab.h> -#include <linux/mm.h> +#include <linux/vmalloc.h> +#include <asm/scatterlist.h> + #include "dma.h" /* dma_prog_region */ diff --git a/drivers/ieee1394/dma.h b/drivers/ieee1394/dma.h index 061550a6fb9..a1682aba71c 100644 --- a/drivers/ieee1394/dma.h +++ b/drivers/ieee1394/dma.h @@ -10,69 +10,91 @@ #ifndef IEEE1394_DMA_H #define IEEE1394_DMA_H -#include <linux/pci.h> -#include <asm/scatterlist.h> - -/* struct dma_prog_region - - a small, physically-contiguous DMA buffer with random-access, - synchronous usage characteristics -*/ - +#include <asm/types.h> + +struct pci_dev; +struct scatterlist; +struct vm_area_struct; + +/** + * struct dma_prog_region - small contiguous DMA buffer + * @kvirt: kernel virtual address + * @dev: PCI device + * @n_pages: number of kernel pages + * @bus_addr: base bus address + * + * a small, physically contiguous DMA buffer with random-access, synchronous + * usage characteristics + */ struct dma_prog_region { - unsigned char *kvirt; /* kernel virtual address */ - struct pci_dev *dev; /* PCI device */ - unsigned int n_pages; /* # of kernel pages */ - dma_addr_t bus_addr; /* base bus address */ + unsigned char *kvirt; + struct pci_dev *dev; + unsigned int n_pages; + dma_addr_t bus_addr; }; /* clear out all fields but do not allocate any memory */ void dma_prog_region_init(struct dma_prog_region *prog); -int dma_prog_region_alloc(struct dma_prog_region *prog, unsigned long n_bytes, struct pci_dev *dev); +int dma_prog_region_alloc(struct dma_prog_region *prog, unsigned long n_bytes, + struct pci_dev *dev); void dma_prog_region_free(struct dma_prog_region *prog); -static inline dma_addr_t dma_prog_region_offset_to_bus(struct dma_prog_region *prog, unsigned long offset) +static inline dma_addr_t dma_prog_region_offset_to_bus( + struct dma_prog_region *prog, unsigned long offset) { return prog->bus_addr + offset; } -/* struct dma_region - - a large, non-physically-contiguous DMA buffer with streaming, - asynchronous usage characteristics -*/ - +/** + * struct dma_region - large non-contiguous DMA buffer + * @virt: kernel virtual address + * @dev: PCI device + * @n_pages: number of kernel pages + * @n_dma_pages: number of IOMMU pages + * @sglist: IOMMU mapping + * @direction: PCI_DMA_TODEVICE, etc. + * + * a large, non-physically-contiguous DMA buffer with streaming, asynchronous + * usage characteristics + */ struct dma_region { - unsigned char *kvirt; /* kernel virtual address */ - struct pci_dev *dev; /* PCI device */ - unsigned int n_pages; /* # of kernel pages */ - unsigned int n_dma_pages; /* # of IOMMU pages */ - struct scatterlist *sglist; /* IOMMU mapping */ - int direction; /* PCI_DMA_TODEVICE, etc */ + unsigned char *kvirt; + struct pci_dev *dev; + unsigned int n_pages; + unsigned int n_dma_pages; + struct scatterlist *sglist; + int direction; }; /* clear out all fields but do not allocate anything */ void dma_region_init(struct dma_region *dma); /* allocate the buffer and map it to the IOMMU */ -int dma_region_alloc(struct dma_region *dma, unsigned long n_bytes, struct pci_dev *dev, int direction); +int dma_region_alloc(struct dma_region *dma, unsigned long n_bytes, + struct pci_dev *dev, int direction); /* unmap and free the buffer */ void dma_region_free(struct dma_region *dma); /* sync the CPU's view of the buffer */ -void dma_region_sync_for_cpu(struct dma_region *dma, unsigned long offset, unsigned long len); +void dma_region_sync_for_cpu(struct dma_region *dma, unsigned long offset, + unsigned long len); + /* sync the IO bus' view of the buffer */ -void dma_region_sync_for_device(struct dma_region *dma, unsigned long offset, unsigned long len); +void dma_region_sync_for_device(struct dma_region *dma, unsigned long offset, + unsigned long len); /* map the buffer into a user space process */ -int dma_region_mmap(struct dma_region *dma, struct file *file, struct vm_area_struct *vma); +int dma_region_mmap(struct dma_region *dma, struct file *file, + struct vm_area_struct *vma); /* macro to index into a DMA region (or dma_prog_region) */ -#define dma_region_i(_dma, _type, _index) ( ((_type*) ((_dma)->kvirt)) + (_index) ) +#define dma_region_i(_dma, _type, _index) \ + ( ((_type*) ((_dma)->kvirt)) + (_index) ) /* return the DMA bus address of the byte with the given offset - relative to the beginning of the dma_region */ -dma_addr_t dma_region_offset_to_bus(struct dma_region *dma, unsigned long offset); + * relative to the beginning of the dma_region */ +dma_addr_t dma_region_offset_to_bus(struct dma_region *dma, + unsigned long offset); #endif /* IEEE1394_DMA_H */ diff --git a/drivers/ieee1394/dv1394-private.h b/drivers/ieee1394/dv1394-private.h index 80b5ac7fe38..7d1d2845b42 100644 --- a/drivers/ieee1394/dv1394-private.h +++ b/drivers/ieee1394/dv1394-private.h @@ -460,7 +460,7 @@ struct video_card { int dma_running; /* - 3) the sleeping semaphore 'sem' - this is used from process context only, + 3) the sleeping mutex 'mtx' - this is used from process context only, to serialize various operations on the video_card. Even though only one open() is allowed, we still need to prevent multiple threads of execution from entering calls like read, write, ioctl, etc. @@ -468,9 +468,9 @@ struct video_card { I honestly can't think of a good reason to use dv1394 from several threads at once, but we need to serialize anyway to prevent oopses =). - NOTE: if you need both spinlock and sem, take sem first to avoid deadlock! + NOTE: if you need both spinlock and mtx, take mtx first to avoid deadlock! */ - struct semaphore sem; + struct mutex mtx; /* people waiting for buffer space, please form a line here... */ wait_queue_head_t waitq; diff --git a/drivers/ieee1394/dv1394.c b/drivers/ieee1394/dv1394.c index 87532dd4337..6c72f04b2b5 100644 --- a/drivers/ieee1394/dv1394.c +++ b/drivers/ieee1394/dv1394.c @@ -95,6 +95,7 @@ #include <linux/fs.h> #include <linux/poll.h> #include <linux/smp_lock.h> +#include <linux/mutex.h> #include <linux/bitops.h> #include <asm/byteorder.h> #include <asm/atomic.h> @@ -110,15 +111,15 @@ #include <linux/compat.h> #include <linux/cdev.h> +#include "dv1394.h" +#include "dv1394-private.h" +#include "highlevel.h" +#include "hosts.h" #include "ieee1394.h" +#include "ieee1394_core.h" +#include "ieee1394_hotplug.h" #include "ieee1394_types.h" #include "nodemgr.h" -#include "hosts.h" -#include "ieee1394_core.h" -#include "highlevel.h" -#include "dv1394.h" -#include "dv1394-private.h" - #include "ohci1394.h" /* DEBUG LEVELS: @@ -136,13 +137,13 @@ #if DV1394_DEBUG_LEVEL >= 2 #define irq_printk( args... ) printk( args ) #else -#define irq_printk( args... ) +#define irq_printk( args... ) do {} while (0) #endif #if DV1394_DEBUG_LEVEL >= 1 #define debug_printk( args... ) printk( args) #else -#define debug_printk( args... ) +#define debug_printk( args... ) do {} while (0) #endif /* issue a dummy PCI read to force the preceding write @@ -247,7 +248,7 @@ static void frame_delete(struct frame *f) Frame_prepare() must be called OUTSIDE the video->spinlock. However, frame_prepare() must still be serialized, so - it should be called WITH the video->sem taken. + it should be called WITH the video->mtx taken. */ static void frame_prepare(struct video_card *video, unsigned int this_frame) @@ -1271,7 +1272,7 @@ static int dv1394_mmap(struct file *file, struct vm_area_struct *vma) int retval = -EINVAL; /* serialize mmap */ - down(&video->sem); + mutex_lock(&video->mtx); if ( ! video_card_initialized(video) ) { retval = do_dv1394_init_default(video); @@ -1281,7 +1282,7 @@ static int dv1394_mmap(struct file *file, struct vm_area_struct *vma) retval = dma_region_mmap(&video->dv_buf, file, vma); out: - up(&video->sem); + mutex_unlock(&video->mtx); return retval; } @@ -1337,17 +1338,17 @@ static ssize_t dv1394_write(struct file *file, const char __user *buffer, size_t /* serialize this to prevent multi-threaded mayhem */ if (file->f_flags & O_NONBLOCK) { - if (down_trylock(&video->sem)) + if (!mutex_trylock(&video->mtx)) return -EAGAIN; } else { - if (down_interruptible(&video->sem)) + if (mutex_lock_interruptible(&video->mtx)) return -ERESTARTSYS; } if ( !video_card_initialized(video) ) { ret = do_dv1394_init_default(video); if (ret) { - up(&video->sem); + mutex_unlock(&video->mtx); return ret; } } @@ -1418,7 +1419,7 @@ static ssize_t dv1394_write(struct file *file, const char __user *buffer, size_t remove_wait_queue(&video->waitq, &wait); set_current_state(TASK_RUNNING); - up(&video->sem); + mutex_unlock(&video->mtx); return ret; } @@ -1434,17 +1435,17 @@ static ssize_t dv1394_read(struct file *file, char __user *buffer, size_t count /* serialize this to prevent multi-threaded mayhem */ if (file->f_flags & O_NONBLOCK) { - if (down_trylock(&video->sem)) + if (!mutex_trylock(&video->mtx)) return -EAGAIN; } else { - if (down_interruptible(&video->sem)) + if (mutex_lock_interruptible(&video->mtx)) return -ERESTARTSYS; } if ( !video_card_initialized(video) ) { ret = do_dv1394_init_default(video); if (ret) { - up(&video->sem); + mutex_unlock(&video->mtx); return ret; } video->continuity_counter = -1; @@ -1526,7 +1527,7 @@ static ssize_t dv1394_read(struct file *file, char __user *buffer, size_t count remove_wait_queue(&video->waitq, &wait); set_current_state(TASK_RUNNING); - up(&video->sem); + mutex_unlock(&video->mtx); return ret; } @@ -1547,12 +1548,12 @@ static long dv1394_ioctl(struct file *file, unsigned int cmd, unsigned long arg) /* serialize this to prevent multi-threaded mayhem */ if (file->f_flags & O_NONBLOCK) { - if (down_trylock(&video->sem)) { + if (!mutex_trylock(&video->mtx)) { unlock_kernel(); return -EAGAIN; } } else { - if (down_interruptible(&video->sem)) { + if (mutex_lock_interruptible(&video->mtx)) { unlock_kernel(); return -ERESTARTSYS; } @@ -1778,7 +1779,7 @@ static long dv1394_ioctl(struct file *file, unsigned int cmd, unsigned long arg) } out: - up(&video->sem); + mutex_unlock(&video->mtx); unlock_kernel(); return ret; } @@ -2253,7 +2254,7 @@ static int dv1394_init(struct ti_ohci *ohci, enum pal_or_ntsc format, enum modes clear_bit(0, &video->open); spin_lock_init(&video->spinlock); video->dma_running = 0; - init_MUTEX(&video->sem); + mutex_init(&video->mtx); init_waitqueue_head(&video->waitq); video->fasync = NULL; diff --git a/drivers/ieee1394/eth1394.c b/drivers/ieee1394/eth1394.c index 2d5b57be98c..8a7b8fab623 100644 --- a/drivers/ieee1394/eth1394.c +++ b/drivers/ieee1394/eth1394.c @@ -64,19 +64,19 @@ #include <linux/ethtool.h> #include <asm/uaccess.h> #include <asm/delay.h> -#include <asm/semaphore.h> #include <net/arp.h> +#include "config_roms.h" #include "csr1212.h" -#include "ieee1394_types.h" +#include "eth1394.h" +#include "highlevel.h" +#include "ieee1394.h" #include "ieee1394_core.h" +#include "ieee1394_hotplug.h" #include "ieee1394_transactions.h" -#include "ieee1394.h" -#include "highlevel.h" +#include "ieee1394_types.h" #include "iso.h" #include "nodemgr.h" -#include "eth1394.h" -#include "config_roms.h" #define ETH1394_PRINT_G(level, fmt, args...) \ printk(level "%s: " fmt, driver_name, ## args) diff --git a/drivers/ieee1394/highlevel.h b/drivers/ieee1394/highlevel.h index e119fb87e5b..50f2dd2c7e2 100644 --- a/drivers/ieee1394/highlevel.h +++ b/drivers/ieee1394/highlevel.h @@ -1,60 +1,61 @@ - #ifndef IEEE1394_HIGHLEVEL_H #define IEEE1394_HIGHLEVEL_H +#include <linux/list.h> +#include <linux/spinlock_types.h> +#include <linux/types.h> -struct hpsb_address_serve { - struct list_head host_list; /* per host list */ +struct module; - struct list_head hl_list; /* hpsb_highlevel list */ +#include "ieee1394_types.h" - struct hpsb_address_ops *op; +struct hpsb_host; +/* internal to ieee1394 core */ +struct hpsb_address_serve { + struct list_head host_list; /* per host list */ + struct list_head hl_list; /* hpsb_highlevel list */ + struct hpsb_address_ops *op; struct hpsb_host *host; - - /* first address handled and first address behind, quadlet aligned */ - u64 start, end; + u64 start; /* first address handled, quadlet aligned */ + u64 end; /* first address behind, quadlet aligned */ }; - -/* - * The above structs are internal to highlevel driver handling. Only the - * following structures are of interest to actual highlevel drivers. - */ +/* Only the following structures are of interest to actual highlevel drivers. */ struct hpsb_highlevel { struct module *owner; const char *name; - /* Any of the following pointers can legally be NULL, except for - * iso_receive which can only be NULL when you don't request - * channels. */ + /* Any of the following pointers can legally be NULL, except for + * iso_receive which can only be NULL when you don't request + * channels. */ - /* New host initialized. Will also be called during - * hpsb_register_highlevel for all hosts already installed. */ - void (*add_host) (struct hpsb_host *host); + /* New host initialized. Will also be called during + * hpsb_register_highlevel for all hosts already installed. */ + void (*add_host)(struct hpsb_host *host); - /* Host about to be removed. Will also be called during - * hpsb_unregister_highlevel once for each host. */ - void (*remove_host) (struct hpsb_host *host); + /* Host about to be removed. Will also be called during + * hpsb_unregister_highlevel once for each host. */ + void (*remove_host)(struct hpsb_host *host); - /* Host experienced bus reset with possible configuration changes. + /* Host experienced bus reset with possible configuration changes. * Note that this one may occur during interrupt/bottom half handling. * You can not expect to be able to do stock hpsb_reads. */ - void (*host_reset) (struct hpsb_host *host); + void (*host_reset)(struct hpsb_host *host); - /* An isochronous packet was received. Channel contains the channel - * number for your convenience, it is also contained in the included - * packet header (first quadlet, CRCs are missing). You may get called - * for channel/host combinations you did not request. */ - void (*iso_receive) (struct hpsb_host *host, int channel, - quadlet_t *data, size_t length); + /* An isochronous packet was received. Channel contains the channel + * number for your convenience, it is also contained in the included + * packet header (first quadlet, CRCs are missing). You may get called + * for channel/host combinations you did not request. */ + void (*iso_receive)(struct hpsb_host *host, int channel, + quadlet_t *data, size_t length); - /* A write request was received on either the FCP_COMMAND (direction = - * 0) or the FCP_RESPONSE (direction = 1) register. The cts arg - * contains the cts field (first byte of data). */ - void (*fcp_request) (struct hpsb_host *host, int nodeid, int direction, - int cts, u8 *data, size_t length); + /* A write request was received on either the FCP_COMMAND (direction = + * 0) or the FCP_RESPONSE (direction = 1) register. The cts arg + * contains the cts field (first byte of data). */ + void (*fcp_request)(struct hpsb_host *host, int nodeid, int direction, + int cts, u8 *data, size_t length); /* These are initialized by the subsystem when the * hpsb_higlevel is registered. */ @@ -67,61 +68,62 @@ struct hpsb_highlevel { }; struct hpsb_address_ops { - /* - * Null function pointers will make the respective operation complete - * with RCODE_TYPE_ERROR. Makes for easy to implement read-only - * registers (just leave everything but read NULL). - * - * All functions shall return appropriate IEEE 1394 rcodes. - */ - - /* These functions have to implement block reads for themselves. */ - /* These functions either return a response code - or a negative number. In the first case a response will be generated; in the - later case, no response will be sent and the driver, that handled the request - will send the response itself - */ - int (*read) (struct hpsb_host *host, int nodeid, quadlet_t *buffer, - u64 addr, size_t length, u16 flags); - int (*write) (struct hpsb_host *host, int nodeid, int destid, - quadlet_t *data, u64 addr, size_t length, u16 flags); - - /* Lock transactions: write results of ext_tcode operation into - * *store. */ - int (*lock) (struct hpsb_host *host, int nodeid, quadlet_t *store, - u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, u16 flags); - int (*lock64) (struct hpsb_host *host, int nodeid, octlet_t *store, - u64 addr, octlet_t data, octlet_t arg, int ext_tcode, u16 flags); + /* + * Null function pointers will make the respective operation complete + * with RCODE_TYPE_ERROR. Makes for easy to implement read-only + * registers (just leave everything but read NULL). + * + * All functions shall return appropriate IEEE 1394 rcodes. + */ + + /* These functions have to implement block reads for themselves. + * + * These functions either return a response code or a negative number. + * In the first case a response will be generated. In the latter case, + * no response will be sent and the driver which handled the request + * will send the response itself. */ + int (*read)(struct hpsb_host *host, int nodeid, quadlet_t *buffer, + u64 addr, size_t length, u16 flags); + int (*write)(struct hpsb_host *host, int nodeid, int destid, + quadlet_t *data, u64 addr, size_t length, u16 flags); + + /* Lock transactions: write results of ext_tcode operation into + * *store. */ + int (*lock)(struct hpsb_host *host, int nodeid, quadlet_t *store, + u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, + u16 flags); + int (*lock64)(struct hpsb_host *host, int nodeid, octlet_t *store, + u64 addr, octlet_t data, octlet_t arg, int ext_tcode, + u16 flags); }; - void highlevel_add_host(struct hpsb_host *host); void highlevel_remove_host(struct hpsb_host *host); void highlevel_host_reset(struct hpsb_host *host); - -/* these functions are called to handle transactions. They are called, when - a packet arrives. The flags argument contains the second word of the first header - quadlet of the incoming packet (containing transaction label, retry code, - transaction code and priority). These functions either return a response code - or a negative number. In the first case a response will be generated; in the - later case, no response will be sent and the driver, that handled the request - will send the response itself. -*/ -int highlevel_read(struct hpsb_host *host, int nodeid, void *data, - u64 addr, unsigned int length, u16 flags); -int highlevel_write(struct hpsb_host *host, int nodeid, int destid, - void *data, u64 addr, unsigned int length, u16 flags); +/* + * These functions are called to handle transactions. They are called when a + * packet arrives. The flags argument contains the second word of the first + * header quadlet of the incoming packet (containing transaction label, retry + * code, transaction code and priority). These functions either return a + * response code or a negative number. In the first case a response will be + * generated. In the latter case, no response will be sent and the driver which + * handled the request will send the response itself. + */ +int highlevel_read(struct hpsb_host *host, int nodeid, void *data, u64 addr, + unsigned int length, u16 flags); +int highlevel_write(struct hpsb_host *host, int nodeid, int destid, void *data, + u64 addr, unsigned int length, u16 flags); int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store, - u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, u16 flags); + u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, + u16 flags); int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store, - u64 addr, octlet_t data, octlet_t arg, int ext_tcode, u16 flags); + u64 addr, octlet_t data, octlet_t arg, int ext_tcode, + u16 flags); -void highlevel_iso_receive(struct hpsb_host *host, void *data, - size_t length); +void highlevel_iso_receive(struct hpsb_host *host, void *data, size_t length); void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction, - void *data, size_t length); - + void *data, size_t length); /* * Register highlevel driver. The name pointer has to stay valid at all times @@ -132,13 +134,15 @@ void hpsb_unregister_highlevel(struct hpsb_highlevel *hl); /* * Register handlers for host address spaces. Start and end are 48 bit pointers - * and have to be quadlet aligned (end points to the first address behind the - * handled addresses. This function can be called multiple times for a single - * hpsb_highlevel to implement sparse register sets. The requested region must - * not overlap any previously allocated region, otherwise registering will fail. + * and have to be quadlet aligned. Argument "end" points to the first address + * behind the handled addresses. This function can be called multiple times for + * a single hpsb_highlevel to implement sparse register sets. The requested + * region must not overlap any previously allocated region, otherwise + * registering will fail. * - * It returns true for successful allocation. There is no unregister function, - * all address spaces are deallocated together with the hpsb_highlevel. + * It returns true for successful allocation. Address spaces can be + * unregistered with hpsb_unregister_addrspace. All remaining address spaces + * are automatically deallocated together with the hpsb_highlevel. */ u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host, @@ -146,20 +150,18 @@ u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl, u64 size, u64 alignment, u64 start, u64 end); int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host, - struct hpsb_address_ops *ops, u64 start, u64 end); - + struct hpsb_address_ops *ops, u64 start, u64 end); int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host, - u64 start); + u64 start); /* * Enable or disable receving a certain isochronous channel through the * iso_receive op. */ int hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host, - unsigned int channel); + unsigned int channel); void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host, - unsigned int channel); - + unsigned int channel); /* Retrieve a hostinfo pointer bound to this driver/host */ void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host); @@ -172,19 +174,24 @@ void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host, void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host); /* Set an alternate lookup key for the hostinfo bound to this driver/host */ -void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, unsigned long key); +void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, + unsigned long key); -/* Retrieve the alternate lookup key for the hostinfo bound to this driver/host */ -unsigned long hpsb_get_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host); +/* Retrieve the alternate lookup key for the hostinfo bound to this + * driver/host */ +unsigned long hpsb_get_hostinfo_key(struct hpsb_highlevel *hl, + struct hpsb_host *host); /* Retrieve a hostinfo pointer bound to this driver using its alternate key */ void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key); /* Set the hostinfo pointer to something useful. Usually follows a call to * hpsb_create_hostinfo, where the size is 0. */ -int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host, void *data); +int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host, + void *data); /* Retrieve hpsb_host using a highlevel handle and a key */ -struct hpsb_host *hpsb_get_host_bykey(struct hpsb_highlevel *hl, unsigned long key); +struct hpsb_host *hpsb_get_host_bykey(struct hpsb_highlevel *hl, + unsigned long key); #endif /* IEEE1394_HIGHLEVEL_H */ diff --git a/drivers/ieee1394/hosts.c b/drivers/ieee1394/hosts.c index 4feead4a35c..d90a3a1898c 100644 --- a/drivers/ieee1394/hosts.c +++ b/drivers/ieee1394/hosts.c @@ -90,6 +90,16 @@ static int alloc_hostnum_cb(struct hpsb_host *host, void *__data) return 0; } +/* + * The pending_packet_queue is special in that it's processed + * from hardirq context too (such as hpsb_bus_reset()). Hence + * split the lock class from the usual networking skb-head + * lock class by using a separate key for it: + */ +static struct lock_class_key pending_packet_queue_key; + +static DEFINE_MUTEX(host_num_alloc); + /** * hpsb_alloc_host - allocate a new host controller. * @drv: the driver that will manage the host controller @@ -105,16 +115,6 @@ static int alloc_hostnum_cb(struct hpsb_host *host, void *__data) * Return Value: a pointer to the &hpsb_host if successful, %NULL if * no memory was available. */ -static DEFINE_MUTEX(host_num_alloc); - -/* - * The pending_packet_queue is special in that it's processed - * from hardirq context too (such as hpsb_bus_reset()). Hence - * split the lock class from the usual networking skb-head - * lock class by using a separate key for it: - */ -static struct lock_class_key pending_packet_queue_key; - struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra, struct device *dev) { @@ -143,9 +143,6 @@ struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra, for (i = 2; i < 16; i++) h->csr.gen_timestamp[i] = jiffies - 60 * HZ; - for (i = 0; i < ARRAY_SIZE(h->tpool); i++) - HPSB_TPOOL_INIT(&h->tpool[i]); - atomic_set(&h->generation, 0); INIT_WORK(&h->delayed_reset, delayed_reset_bus, h); diff --git a/drivers/ieee1394/hosts.h b/drivers/ieee1394/hosts.h index 9ad4b246307..bc6dbfadb89 100644 --- a/drivers/ieee1394/hosts.h +++ b/drivers/ieee1394/hosts.h @@ -2,17 +2,19 @@ #define _IEEE1394_HOSTS_H #include <linux/device.h> -#include <linux/wait.h> #include <linux/list.h> -#include <linux/timer.h> #include <linux/skbuff.h> +#include <linux/timer.h> +#include <linux/types.h> +#include <linux/workqueue.h> +#include <asm/atomic.h> -#include <asm/semaphore.h> +struct pci_dev; +struct module; #include "ieee1394_types.h" #include "csr.h" - struct hpsb_packet; struct hpsb_iso; @@ -33,7 +35,6 @@ struct hpsb_host { int node_count; /* number of identified nodes on this bus */ int selfid_count; /* total number of SelfIDs received */ int nodes_active; /* number of nodes with active link layer */ - u8 speed[ALL_NODES]; /* speed between each node and local node */ nodeid_t node_id; /* node ID of this host */ nodeid_t irm_id; /* ID of this bus' isochronous resource manager */ @@ -53,31 +54,29 @@ struct hpsb_host { int reset_retries; quadlet_t *topology_map; u8 *speed_map; - struct csr_control csr; - - /* Per node tlabel pool allocation */ - struct hpsb_tlabel_pool tpool[ALL_NODES]; + int id; struct hpsb_host_driver *driver; - struct pci_dev *pdev; - - int id; - struct device device; struct class_device class_dev; int update_config_rom; struct work_struct delayed_reset; - unsigned int config_roms; struct list_head addr_space; u64 low_addr_space; /* upper bound of physical DMA area */ u64 middle_addr_space; /* upper bound of posted write area */ -}; + u8 speed[ALL_NODES]; /* speed between each node and local node */ + + /* per node tlabel allocation */ + u8 next_tl[ALL_NODES]; + struct { DECLARE_BITMAP(map, 64); } tl_pool[ALL_NODES]; + struct csr_control csr; +}; enum devctl_cmd { /* Host is requested to reset its bus and cancel all outstanding async @@ -112,7 +111,7 @@ enum devctl_cmd { enum isoctl_cmd { /* rawiso API - see iso.h for the meanings of these commands - (they correspond exactly to the hpsb_iso_* API functions) + * (they correspond exactly to the hpsb_iso_* API functions) * INIT = allocate resources * START = begin transmission/reception * STOP = halt transmission/reception @@ -160,7 +159,8 @@ struct hpsb_host_driver { /* The hardware driver may optionally support a function that is used * to set the hardware ConfigROM if the hardware supports handling * reads to the ConfigROM on its own. */ - void (*set_hw_config_rom) (struct hpsb_host *host, quadlet_t *config_rom); + void (*set_hw_config_rom)(struct hpsb_host *host, + quadlet_t *config_rom); /* This function shall implement packet transmission based on * packet->type. It shall CRC both parts of the packet (unless @@ -170,20 +170,21 @@ struct hpsb_host_driver { * called. Return 0 on success, negative errno on failure. * NOTE: The function must be callable in interrupt context. */ - int (*transmit_packet) (struct hpsb_host *host, - struct hpsb_packet *packet); + int (*transmit_packet)(struct hpsb_host *host, + struct hpsb_packet *packet); /* This function requests miscellanous services from the driver, see * above for command codes and expected actions. Return -1 for unknown * command, though that should never happen. */ - int (*devctl) (struct hpsb_host *host, enum devctl_cmd command, int arg); + int (*devctl)(struct hpsb_host *host, enum devctl_cmd command, int arg); /* ISO transmission/reception functions. Return 0 on success, -1 * (or -EXXX errno code) on failure. If the low-level driver does not * support the new ISO API, set isoctl to NULL. */ - int (*isoctl) (struct hpsb_iso *iso, enum isoctl_cmd command, unsigned long arg); + int (*isoctl)(struct hpsb_iso *iso, enum isoctl_cmd command, + unsigned long arg); /* This function is mainly to redirect local CSR reads/locks to the iso * management registers (bus manager id, bandwidth available, channels @@ -196,19 +197,11 @@ struct hpsb_host_driver { quadlet_t data, quadlet_t compare); }; - struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra, struct device *dev); int hpsb_add_host(struct hpsb_host *host); void hpsb_remove_host(struct hpsb_host *h); -/* The following 2 functions are deprecated and will be removed when the - * raw1394/libraw1394 update is complete. */ -int hpsb_update_config_rom(struct hpsb_host *host, - const quadlet_t *new_rom, size_t size, unsigned char rom_version); -int hpsb_get_config_rom(struct hpsb_host *host, quadlet_t *buffer, - size_t buffersize, size_t *rom_size, unsigned char *rom_version); - /* Updates the configuration rom image of a host. rom_version must be the * current version, otherwise it will fail with return value -1. If this * host does not support config-rom-update, it will return -EINVAL. diff --git a/drivers/ieee1394/ieee1394-ioctl.h b/drivers/ieee1394/ieee1394-ioctl.h index 15670398634..8f207508ed1 100644 --- a/drivers/ieee1394/ieee1394-ioctl.h +++ b/drivers/ieee1394/ieee1394-ioctl.h @@ -1,5 +1,7 @@ -/* Base file for all ieee1394 ioctl's. Linux-1394 has allocated base '#' - * with a range of 0x00-0x3f. */ +/* + * Base file for all ieee1394 ioctl's. + * Linux-1394 has allocated base '#' with a range of 0x00-0x3f. + */ #ifndef __IEEE1394_IOCTL_H #define __IEEE1394_IOCTL_H @@ -96,8 +98,7 @@ _IOW ('#', 0x27, struct raw1394_iso_packets) #define RAW1394_IOC_ISO_XMIT_SYNC \ _IO ('#', 0x28) -#define RAW1394_IOC_ISO_RECV_FLUSH \ +#define RAW1394_IOC_ISO_RECV_FLUSH \ _IO ('#', 0x29) - #endif /* __IEEE1394_IOCTL_H */ diff --git a/drivers/ieee1394/ieee1394.h b/drivers/ieee1394/ieee1394.h index 936d776de00..40492074c01 100644 --- a/drivers/ieee1394/ieee1394.h +++ b/drivers/ieee1394/ieee1394.h @@ -5,77 +5,78 @@ #ifndef _IEEE1394_IEEE1394_H #define _IEEE1394_IEEE1394_H -#define TCODE_WRITEQ 0x0 -#define TCODE_WRITEB 0x1 -#define TCODE_WRITE_RESPONSE 0x2 -#define TCODE_READQ 0x4 -#define TCODE_READB 0x5 -#define TCODE_READQ_RESPONSE 0x6 -#define TCODE_READB_RESPONSE 0x7 -#define TCODE_CYCLE_START 0x8 -#define TCODE_LOCK_REQUEST 0x9 -#define TCODE_ISO_DATA 0xa -#define TCODE_STREAM_DATA 0xa -#define TCODE_LOCK_RESPONSE 0xb - -#define RCODE_COMPLETE 0x0 -#define RCODE_CONFLICT_ERROR 0x4 -#define RCODE_DATA_ERROR 0x5 -#define RCODE_TYPE_ERROR 0x6 -#define RCODE_ADDRESS_ERROR 0x7 - -#define EXTCODE_MASK_SWAP 0x1 -#define EXTCODE_COMPARE_SWAP 0x2 -#define EXTCODE_FETCH_ADD 0x3 -#define EXTCODE_LITTLE_ADD 0x4 -#define EXTCODE_BOUNDED_ADD 0x5 -#define EXTCODE_WRAP_ADD 0x6 - -#define ACK_COMPLETE 0x1 -#define ACK_PENDING 0x2 -#define ACK_BUSY_X 0x4 -#define ACK_BUSY_A 0x5 -#define ACK_BUSY_B 0x6 -#define ACK_TARDY 0xb -#define ACK_CONFLICT_ERROR 0xc -#define ACK_DATA_ERROR 0xd -#define ACK_TYPE_ERROR 0xe -#define ACK_ADDRESS_ERROR 0xf +#define TCODE_WRITEQ 0x0 +#define TCODE_WRITEB 0x1 +#define TCODE_WRITE_RESPONSE 0x2 +#define TCODE_READQ 0x4 +#define TCODE_READB 0x5 +#define TCODE_READQ_RESPONSE 0x6 +#define TCODE_READB_RESPONSE 0x7 +#define TCODE_CYCLE_START 0x8 +#define TCODE_LOCK_REQUEST 0x9 +#define TCODE_ISO_DATA 0xa +#define TCODE_STREAM_DATA 0xa +#define TCODE_LOCK_RESPONSE 0xb + +#define RCODE_COMPLETE 0x0 +#define RCODE_CONFLICT_ERROR 0x4 +#define RCODE_DATA_ERROR 0x5 +#define RCODE_TYPE_ERROR 0x6 +#define RCODE_ADDRESS_ERROR 0x7 + +#define EXTCODE_MASK_SWAP 0x1 +#define EXTCODE_COMPARE_SWAP 0x2 +#define EXTCODE_FETCH_ADD 0x3 +#define EXTCODE_LITTLE_ADD 0x4 +#define EXTCODE_BOUNDED_ADD 0x5 +#define EXTCODE_WRAP_ADD 0x6 + +#define ACK_COMPLETE 0x1 +#define ACK_PENDING 0x2 +#define ACK_BUSY_X 0x4 +#define ACK_BUSY_A 0x5 +#define ACK_BUSY_B 0x6 +#define ACK_TARDY 0xb +#define ACK_CONFLICT_ERROR 0xc +#define ACK_DATA_ERROR 0xd +#define ACK_TYPE_ERROR 0xe +#define ACK_ADDRESS_ERROR 0xf /* Non-standard "ACK codes" for internal use */ -#define ACKX_NONE (-1) -#define ACKX_SEND_ERROR (-2) -#define ACKX_ABORTED (-3) -#define ACKX_TIMEOUT (-4) - - -#define IEEE1394_SPEED_100 0x00 -#define IEEE1394_SPEED_200 0x01 -#define IEEE1394_SPEED_400 0x02 -#define IEEE1394_SPEED_800 0x03 -#define IEEE1394_SPEED_1600 0x04 -#define IEEE1394_SPEED_3200 0x05 +#define ACKX_NONE (-1) +#define ACKX_SEND_ERROR (-2) +#define ACKX_ABORTED (-3) +#define ACKX_TIMEOUT (-4) + +#define IEEE1394_SPEED_100 0x00 +#define IEEE1394_SPEED_200 0x01 +#define IEEE1394_SPEED_400 0x02 +#define IEEE1394_SPEED_800 0x03 +#define IEEE1394_SPEED_1600 0x04 +#define IEEE1394_SPEED_3200 0x05 + /* The current highest tested speed supported by the subsystem */ -#define IEEE1394_SPEED_MAX IEEE1394_SPEED_800 +#define IEEE1394_SPEED_MAX IEEE1394_SPEED_800 /* Maps speed values above to a string representation */ extern const char *hpsb_speedto_str[]; - /* 1394a cable PHY packets */ -#define SELFID_PWRCL_NO_POWER 0x0 -#define SELFID_PWRCL_PROVIDE_15W 0x1 -#define SELFID_PWRCL_PROVIDE_30W 0x2 -#define SELFID_PWRCL_PROVIDE_45W 0x3 -#define SELFID_PWRCL_USE_1W 0x4 -#define SELFID_PWRCL_USE_3W 0x5 -#define SELFID_PWRCL_USE_6W 0x6 -#define SELFID_PWRCL_USE_10W 0x7 - -#define SELFID_PORT_CHILD 0x3 -#define SELFID_PORT_PARENT 0x2 -#define SELFID_PORT_NCONN 0x1 -#define SELFID_PORT_NONE 0x0 +#define SELFID_PWRCL_NO_POWER 0x0 +#define SELFID_PWRCL_PROVIDE_15W 0x1 +#define SELFID_PWRCL_PROVIDE_30W 0x2 +#define SELFID_PWRCL_PROVIDE_45W 0x3 +#define SELFID_PWRCL_USE_1W 0x4 +#define SELFID_PWRCL_USE_3W 0x5 +#define SELFID_PWRCL_USE_6W 0x6 +#define SELFID_PWRCL_USE_10W 0x7 + +#define SELFID_PORT_CHILD 0x3 +#define SELFID_PORT_PARENT 0x2 +#define SELFID_PORT_NCONN 0x1 +#define SELFID_PORT_NONE 0x0 + +#define SELFID_SPEED_UNKNOWN 0x3 /* 1394b PHY */ #define PHYPACKET_LINKON 0x40000000 #define PHYPACKET_PHYCONFIG_R 0x00800000 @@ -91,76 +92,76 @@ extern const char *hpsb_speedto_str[]; #define EXTPHYPACKET_TYPEMASK 0xC0FC0000 -#define PHYPACKET_PORT_SHIFT 24 -#define PHYPACKET_GAPCOUNT_SHIFT 16 +#define PHYPACKET_PORT_SHIFT 24 +#define PHYPACKET_GAPCOUNT_SHIFT 16 /* 1394a PHY register map bitmasks */ -#define PHY_00_PHYSICAL_ID 0xFC -#define PHY_00_R 0x02 /* Root */ -#define PHY_00_PS 0x01 /* Power Status*/ -#define PHY_01_RHB 0x80 /* Root Hold-Off */ -#define PHY_01_IBR 0x80 /* Initiate Bus Reset */ -#define PHY_01_GAP_COUNT 0x3F -#define PHY_02_EXTENDED 0xE0 /* 0x7 for 1394a-compliant PHY */ -#define PHY_02_TOTAL_PORTS 0x1F -#define PHY_03_MAX_SPEED 0xE0 -#define PHY_03_DELAY 0x0F -#define PHY_04_LCTRL 0x80 /* Link Active Report Control */ -#define PHY_04_CONTENDER 0x40 -#define PHY_04_JITTER 0x38 -#define PHY_04_PWR_CLASS 0x07 /* Power Class */ -#define PHY_05_WATCHDOG 0x80 -#define PHY_05_ISBR 0x40 /* Initiate Short Bus Reset */ -#define PHY_05_LOOP 0x20 /* Loop Detect */ -#define PHY_05_PWR_FAIL 0x10 /* Cable Power Failure Detect */ -#define PHY_05_TIMEOUT 0x08 /* Arbitration State Machine Timeout */ -#define PHY_05_PORT_EVENT 0x04 /* Port Event Detect */ -#define PHY_05_ENAB_ACCEL 0x02 /* Enable Arbitration Acceleration */ -#define PHY_05_ENAB_MULTI 0x01 /* Ena. Multispeed Packet Concatenation */ +#define PHY_00_PHYSICAL_ID 0xFC +#define PHY_00_R 0x02 /* Root */ +#define PHY_00_PS 0x01 /* Power Status*/ +#define PHY_01_RHB 0x80 /* Root Hold-Off */ +#define PHY_01_IBR 0x80 /* Initiate Bus Reset */ +#define PHY_01_GAP_COUNT 0x3F +#define PHY_02_EXTENDED 0xE0 /* 0x7 for 1394a-compliant PHY */ +#define PHY_02_TOTAL_PORTS 0x1F +#define PHY_03_MAX_SPEED 0xE0 +#define PHY_03_DELAY 0x0F +#define PHY_04_LCTRL 0x80 /* Link Active Report Control */ +#define PHY_04_CONTENDER 0x40 +#define PHY_04_JITTER 0x38 +#define PHY_04_PWR_CLASS 0x07 /* Power Class */ +#define PHY_05_WATCHDOG 0x80 +#define PHY_05_ISBR 0x40 /* Initiate Short Bus Reset */ +#define PHY_05_LOOP 0x20 /* Loop Detect */ +#define PHY_05_PWR_FAIL 0x10 /* Cable Power Failure Detect */ +#define PHY_05_TIMEOUT 0x08 /* Arbitration State Machine Timeout */ +#define PHY_05_PORT_EVENT 0x04 /* Port Event Detect */ +#define PHY_05_ENAB_ACCEL 0x02 /* Enable Arbitration Acceleration */ +#define PHY_05_ENAB_MULTI 0x01 /* Ena. Multispeed Packet Concatenation */ #include <asm/byteorder.h> #ifdef __BIG_ENDIAN_BITFIELD struct selfid { - u32 packet_identifier:2; /* always binary 10 */ - u32 phy_id:6; - /* byte */ - u32 extended:1; /* if true is struct ext_selfid */ - u32 link_active:1; - u32 gap_count:6; - /* byte */ - u32 speed:2; - u32 phy_delay:2; - u32 contender:1; - u32 power_class:3; - /* byte */ - u32 port0:2; - u32 port1:2; - u32 port2:2; - u32 initiated_reset:1; - u32 more_packets:1; + u32 packet_identifier:2; /* always binary 10 */ + u32 phy_id:6; + /* byte */ + u32 extended:1; /* if true is struct ext_selfid */ + u32 link_active:1; + u32 gap_count:6; + /* byte */ + u32 speed:2; + u32 phy_delay:2; + u32 contender:1; + u32 power_class:3; + /* byte */ + u32 port0:2; + u32 port1:2; + u32 port2:2; + u32 initiated_reset:1; + u32 more_packets:1; } __attribute__((packed)); struct ext_selfid { - u32 packet_identifier:2; /* always binary 10 */ - u32 phy_id:6; - /* byte */ - u32 extended:1; /* if false is struct selfid */ - u32 seq_nr:3; - u32 reserved:2; - u32 porta:2; - /* byte */ - u32 portb:2; - u32 portc:2; - u32 portd:2; - u32 porte:2; - /* byte */ - u32 portf:2; - u32 portg:2; - u32 porth:2; - u32 reserved2:1; - u32 more_packets:1; + u32 packet_identifier:2; /* always binary 10 */ + u32 phy_id:6; + /* byte */ + u32 extended:1; /* if false is struct selfid */ + u32 seq_nr:3; + u32 reserved:2; + u32 porta:2; + /* byte */ + u32 portb:2; + u32 portc:2; + u32 portd:2; + u32 porte:2; + /* byte */ + u32 portf:2; + u32 portg:2; + u32 porth:2; + u32 reserved2:1; + u32 more_packets:1; } __attribute__((packed)); #elif defined __LITTLE_ENDIAN_BITFIELD /* __BIG_ENDIAN_BITFIELD */ @@ -171,49 +172,48 @@ struct ext_selfid { */ struct selfid { - u32 phy_id:6; - u32 packet_identifier:2; /* always binary 10 */ - /* byte */ - u32 gap_count:6; - u32 link_active:1; - u32 extended:1; /* if true is struct ext_selfid */ - /* byte */ - u32 power_class:3; - u32 contender:1; - u32 phy_delay:2; - u32 speed:2; - /* byte */ - u32 more_packets:1; - u32 initiated_reset:1; - u32 port2:2; - u32 port1:2; - u32 port0:2; + u32 phy_id:6; + u32 packet_identifier:2; /* always binary 10 */ + /* byte */ + u32 gap_count:6; + u32 link_active:1; + u32 extended:1; /* if true is struct ext_selfid */ + /* byte */ + u32 power_class:3; + u32 contender:1; + u32 phy_delay:2; + u32 speed:2; + /* byte */ + u32 more_packets:1; + u32 initiated_reset:1; + u32 port2:2; + u32 port1:2; + u32 port0:2; } __attribute__((packed)); struct ext_selfid { - u32 phy_id:6; - u32 packet_identifier:2; /* always binary 10 */ - /* byte */ - u32 porta:2; - u32 reserved:2; - u32 seq_nr:3; - u32 extended:1; /* if false is struct selfid */ - /* byte */ - u32 porte:2; - u32 portd:2; - u32 portc:2; - u32 portb:2; - /* byte */ - u32 more_packets:1; - u32 reserved2:1; - u32 porth:2; - u32 portg:2; - u32 portf:2; + u32 phy_id:6; + u32 packet_identifier:2; /* always binary 10 */ + /* byte */ + u32 porta:2; + u32 reserved:2; + u32 seq_nr:3; + u32 extended:1; /* if false is struct selfid */ + /* byte */ + u32 porte:2; + u32 portd:2; + u32 portc:2; + u32 portb:2; + /* byte */ + u32 more_packets:1; + u32 reserved2:1; + u32 porth:2; + u32 portg:2; + u32 portf:2; } __attribute__((packed)); #else #error What? PDP endian? #endif /* __BIG_ENDIAN_BITFIELD */ - #endif /* _IEEE1394_IEEE1394_H */ diff --git a/drivers/ieee1394/ieee1394_core.c b/drivers/ieee1394/ieee1394_core.c index f43739c5cab..5fccf9f7a1d 100644 --- a/drivers/ieee1394/ieee1394_core.c +++ b/drivers/ieee1394/ieee1394_core.c @@ -35,7 +35,6 @@ #include <linux/kthread.h> #include <asm/byteorder.h> -#include <asm/semaphore.h> #include "ieee1394_types.h" #include "ieee1394.h" @@ -86,7 +85,7 @@ static void dump_packet(const char *text, quadlet_t *data, int size, int speed) printk("\n"); } #else -#define dump_packet(a,b,c,d) +#define dump_packet(a,b,c,d) do {} while (0) #endif static void abort_requests(struct hpsb_host *host); @@ -355,10 +354,12 @@ static void build_speed_map(struct hpsb_host *host, int nodecount) } } +#if SELFID_SPEED_UNKNOWN != IEEE1394_SPEED_MAX /* assume maximum speed for 1394b PHYs, nodemgr will correct it */ for (n = 0; n < nodecount; n++) - if (speedcap[n] == 3) + if (speedcap[n] == SELFID_SPEED_UNKNOWN) speedcap[n] = IEEE1394_SPEED_MAX; +#endif } @@ -1169,7 +1170,7 @@ static void __exit ieee1394_cleanup(void) unregister_chrdev_region(IEEE1394_CORE_DEV, 256); } -module_init(ieee1394_init); +fs_initcall(ieee1394_init); /* same as ohci1394 */ module_exit(ieee1394_cleanup); /* Exported symbols */ diff --git a/drivers/ieee1394/ieee1394_core.h b/drivers/ieee1394/ieee1394_core.h index 0ecbf335c64..af4a78a8ef3 100644 --- a/drivers/ieee1394/ieee1394_core.h +++ b/drivers/ieee1394/ieee1394_core.h @@ -1,12 +1,15 @@ - #ifndef _IEEE1394_CORE_H #define _IEEE1394_CORE_H -#include <linux/slab.h> +#include <linux/device.h> +#include <linux/fs.h> +#include <linux/list.h> +#include <linux/skbuff.h> +#include <linux/types.h> #include <asm/atomic.h> -#include <asm/semaphore.h> -#include "hosts.h" +#include "hosts.h" +#include "ieee1394_types.h" struct hpsb_packet { /* This struct is basically read-only for hosts with the exception of @@ -58,7 +61,6 @@ struct hpsb_packet { size_t header_size; size_t data_size; - struct hpsb_host *host; unsigned int generation; @@ -80,7 +82,7 @@ struct hpsb_packet { /* Set a task for when a packet completes */ void hpsb_set_packet_complete_task(struct hpsb_packet *packet, - void (*routine)(void *), void *data); + void (*routine)(void *), void *data); static inline struct hpsb_packet *driver_packet(struct list_head *l) { @@ -92,7 +94,6 @@ void abort_timedouts(unsigned long __opaque); struct hpsb_packet *hpsb_alloc_packet(size_t data_size); void hpsb_free_packet(struct hpsb_packet *packet); - /* * Generation counter for the complete 1394 subsystem. Generation gets * incremented on every change in the subsystem (e.g. bus reset). @@ -204,10 +205,14 @@ void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size, #define IEEE1394_MINOR_BLOCK_EXPERIMENTAL 15 #define IEEE1394_CORE_DEV MKDEV(IEEE1394_MAJOR, 0) -#define IEEE1394_RAW1394_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_RAW1394 * 16) -#define IEEE1394_VIDEO1394_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_VIDEO1394 * 16) -#define IEEE1394_DV1394_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_DV1394 * 16) -#define IEEE1394_EXPERIMENTAL_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_EXPERIMENTAL * 16) +#define IEEE1394_RAW1394_DEV MKDEV(IEEE1394_MAJOR, \ + IEEE1394_MINOR_BLOCK_RAW1394 * 16) +#define IEEE1394_VIDEO1394_DEV MKDEV(IEEE1394_MAJOR, \ + IEEE1394_MINOR_BLOCK_VIDEO1394 * 16) +#define IEEE1394_DV1394_DEV MKDEV(IEEE1394_MAJOR, \ + IEEE1394_MINOR_BLOCK_DV1394 * 16) +#define IEEE1394_EXPERIMENTAL_DEV MKDEV(IEEE1394_MAJOR, \ + IEEE1394_MINOR_BLOCK_EXPERIMENTAL * 16) /* return the index (within a minor number block) of a file */ static inline unsigned char ieee1394_file_to_instance(struct file *file) @@ -223,4 +228,3 @@ extern struct class hpsb_host_class; extern struct class *hpsb_protocol_class; #endif /* _IEEE1394_CORE_H */ - diff --git a/drivers/ieee1394/ieee1394_hotplug.h b/drivers/ieee1394/ieee1394_hotplug.h index 5be70d31b00..dd5500ed832 100644 --- a/drivers/ieee1394/ieee1394_hotplug.h +++ b/drivers/ieee1394/ieee1394_hotplug.h @@ -1,33 +1,19 @@ #ifndef _IEEE1394_HOTPLUG_H #define _IEEE1394_HOTPLUG_H -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/mod_devicetable.h> - /* Unit spec id and sw version entry for some protocols */ #define AVC_UNIT_SPEC_ID_ENTRY 0x0000A02D #define AVC_SW_VERSION_ENTRY 0x00010001 #define CAMERA_UNIT_SPEC_ID_ENTRY 0x0000A02D #define CAMERA_SW_VERSION_ENTRY 0x00000100 -/* Check to make sure this all isn't already defined */ -#ifndef IEEE1394_MATCH_VENDOR_ID - -#define IEEE1394_MATCH_VENDOR_ID 0x0001 -#define IEEE1394_MATCH_MODEL_ID 0x0002 -#define IEEE1394_MATCH_SPECIFIER_ID 0x0004 -#define IEEE1394_MATCH_VERSION 0x0008 - -struct ieee1394_device_id { - u32 match_flags; - u32 vendor_id; - u32 model_id; - u32 specifier_id; - u32 version; - void *driver_data; -}; - -#endif +/* /include/linux/mod_devicetable.h defines: + * IEEE1394_MATCH_VENDOR_ID + * IEEE1394_MATCH_MODEL_ID + * IEEE1394_MATCH_SPECIFIER_ID + * IEEE1394_MATCH_VERSION + * struct ieee1394_device_id + */ +#include <linux/mod_devicetable.h> #endif /* _IEEE1394_HOTPLUG_H */ diff --git a/drivers/ieee1394/ieee1394_transactions.c b/drivers/ieee1394/ieee1394_transactions.c index a114b91d606..0833fc9f50c 100644 --- a/drivers/ieee1394/ieee1394_transactions.c +++ b/drivers/ieee1394/ieee1394_transactions.c @@ -9,19 +9,17 @@ * directory of the kernel sources for details. */ -#include <linux/sched.h> #include <linux/bitops.h> -#include <linux/smp_lock.h> -#include <linux/interrupt.h> +#include <linux/spinlock.h> +#include <linux/wait.h> +#include <asm/bug.h> #include <asm/errno.h> #include "ieee1394.h" #include "ieee1394_types.h" #include "hosts.h" #include "ieee1394_core.h" -#include "highlevel.h" -#include "nodemgr.h" #include "ieee1394_transactions.h" #define PREP_ASYNC_HEAD_ADDRESS(tc) \ @@ -31,6 +29,13 @@ packet->header[1] = (packet->host->node_id << 16) | (addr >> 32); \ packet->header[2] = addr & 0xffffffff +#ifndef HPSB_DEBUG_TLABELS +static +#endif +spinlock_t hpsb_tlabel_lock = SPIN_LOCK_UNLOCKED; + +static DECLARE_WAIT_QUEUE_HEAD(tlabel_wq); + static void fill_async_readquad(struct hpsb_packet *packet, u64 addr) { PREP_ASYNC_HEAD_ADDRESS(TCODE_READQ); @@ -114,9 +119,41 @@ static void fill_async_stream_packet(struct hpsb_packet *packet, int length, packet->tcode = TCODE_ISO_DATA; } +/* same as hpsb_get_tlabel, except that it returns immediately */ +static int hpsb_get_tlabel_atomic(struct hpsb_packet *packet) +{ + unsigned long flags, *tp; + u8 *next; + int tlabel, n = NODEID_TO_NODE(packet->node_id); + + /* Broadcast transactions are complete once the request has been sent. + * Use the same transaction label for all broadcast transactions. */ + if (unlikely(n == ALL_NODES)) { + packet->tlabel = 0; + return 0; + } + tp = packet->host->tl_pool[n].map; + next = &packet->host->next_tl[n]; + + spin_lock_irqsave(&hpsb_tlabel_lock, flags); + tlabel = find_next_zero_bit(tp, 64, *next); + if (tlabel > 63) + tlabel = find_first_zero_bit(tp, 64); + if (tlabel > 63) { + spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); + return -EAGAIN; + } + __set_bit(tlabel, tp); + *next = (tlabel + 1) & 63; + spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); + + packet->tlabel = tlabel; + return 0; +} + /** * hpsb_get_tlabel - allocate a transaction label - * @packet: the packet who's tlabel/tpool we set + * @packet: the packet whose tlabel and tl_pool we set * * Every asynchronous transaction on the 1394 bus needs a transaction * label to match the response to the request. This label has to be @@ -130,42 +167,25 @@ static void fill_async_stream_packet(struct hpsb_packet *packet, int length, * Return value: Zero on success, otherwise non-zero. A non-zero return * generally means there are no available tlabels. If this is called out * of interrupt or atomic context, then it will sleep until can return a - * tlabel. + * tlabel or a signal is received. */ int hpsb_get_tlabel(struct hpsb_packet *packet) { - unsigned long flags; - struct hpsb_tlabel_pool *tp; - int n = NODEID_TO_NODE(packet->node_id); - - if (unlikely(n == ALL_NODES)) - return 0; - tp = &packet->host->tpool[n]; - - if (irqs_disabled() || in_atomic()) { - if (down_trylock(&tp->count)) - return 1; - } else { - down(&tp->count); - } - - spin_lock_irqsave(&tp->lock, flags); - - packet->tlabel = find_next_zero_bit(tp->pool, 64, tp->next); - if (packet->tlabel > 63) - packet->tlabel = find_first_zero_bit(tp->pool, 64); - tp->next = (packet->tlabel + 1) % 64; - /* Should _never_ happen */ - BUG_ON(test_and_set_bit(packet->tlabel, tp->pool)); - tp->allocations++; - spin_unlock_irqrestore(&tp->lock, flags); - - return 0; + if (irqs_disabled() || in_atomic()) + return hpsb_get_tlabel_atomic(packet); + + /* NB: The macro wait_event_interruptible() is called with a condition + * argument with side effect. This is only possible because the side + * effect does not occur until the condition became true, and + * wait_event_interruptible() won't evaluate the condition again after + * that. */ + return wait_event_interruptible(tlabel_wq, + !hpsb_get_tlabel_atomic(packet)); } /** * hpsb_free_tlabel - free an allocated transaction label - * @packet: packet whos tlabel/tpool needs to be cleared + * @packet: packet whose tlabel and tl_pool needs to be cleared * * Frees the transaction label allocated with hpsb_get_tlabel(). The * tlabel has to be freed after the transaction is complete (i.e. response @@ -176,21 +196,20 @@ int hpsb_get_tlabel(struct hpsb_packet *packet) */ void hpsb_free_tlabel(struct hpsb_packet *packet) { - unsigned long flags; - struct hpsb_tlabel_pool *tp; - int n = NODEID_TO_NODE(packet->node_id); + unsigned long flags, *tp; + int tlabel, n = NODEID_TO_NODE(packet->node_id); if (unlikely(n == ALL_NODES)) return; - tp = &packet->host->tpool[n]; + tp = packet->host->tl_pool[n].map; + tlabel = packet->tlabel; + BUG_ON(tlabel > 63 || tlabel < 0); - BUG_ON(packet->tlabel > 63 || packet->tlabel < 0); + spin_lock_irqsave(&hpsb_tlabel_lock, flags); + BUG_ON(!__test_and_clear_bit(tlabel, tp)); + spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); - spin_lock_irqsave(&tp->lock, flags); - BUG_ON(!test_and_clear_bit(packet->tlabel, tp->pool)); - spin_unlock_irqrestore(&tp->lock, flags); - - up(&tp->count); + wake_up_interruptible(&tlabel_wq); } int hpsb_packet_success(struct hpsb_packet *packet) @@ -214,7 +233,7 @@ int hpsb_packet_success(struct hpsb_packet *packet) packet->node_id); return -EAGAIN; } - HPSB_PANIC("reached unreachable code 1 in %s", __FUNCTION__); + BUG(); case ACK_BUSY_X: case ACK_BUSY_A: @@ -261,8 +280,7 @@ int hpsb_packet_success(struct hpsb_packet *packet) packet->ack_code, packet->node_id, packet->tcode); return -EAGAIN; } - - HPSB_PANIC("reached unreachable code 2 in %s", __FUNCTION__); + BUG(); } struct hpsb_packet *hpsb_make_readpacket(struct hpsb_host *host, nodeid_t node, diff --git a/drivers/ieee1394/ieee1394_transactions.h b/drivers/ieee1394/ieee1394_transactions.h index 45ba784fe6d..c1369c41469 100644 --- a/drivers/ieee1394/ieee1394_transactions.h +++ b/drivers/ieee1394/ieee1394_transactions.h @@ -1,32 +1,32 @@ #ifndef _IEEE1394_TRANSACTIONS_H #define _IEEE1394_TRANSACTIONS_H -#include "ieee1394_core.h" +#include <linux/types.h> +#include "ieee1394_types.h" + +struct hpsb_packet; +struct hpsb_host; -/* - * Get and free transaction labels. - */ int hpsb_get_tlabel(struct hpsb_packet *packet); void hpsb_free_tlabel(struct hpsb_packet *packet); - struct hpsb_packet *hpsb_make_readpacket(struct hpsb_host *host, nodeid_t node, u64 addr, size_t length); struct hpsb_packet *hpsb_make_lockpacket(struct hpsb_host *host, nodeid_t node, - u64 addr, int extcode, quadlet_t *data, + u64 addr, int extcode, quadlet_t *data, quadlet_t arg); -struct hpsb_packet *hpsb_make_lock64packet(struct hpsb_host *host, nodeid_t node, - u64 addr, int extcode, octlet_t *data, - octlet_t arg); -struct hpsb_packet *hpsb_make_phypacket(struct hpsb_host *host, - quadlet_t data) ; -struct hpsb_packet *hpsb_make_isopacket(struct hpsb_host *host, - int length, int channel, - int tag, int sync); -struct hpsb_packet *hpsb_make_writepacket (struct hpsb_host *host, nodeid_t node, - u64 addr, quadlet_t *buffer, size_t length); +struct hpsb_packet *hpsb_make_lock64packet(struct hpsb_host *host, + nodeid_t node, u64 addr, int extcode, + octlet_t *data, octlet_t arg); +struct hpsb_packet *hpsb_make_phypacket(struct hpsb_host *host, quadlet_t data); +struct hpsb_packet *hpsb_make_isopacket(struct hpsb_host *host, int length, + int channel, int tag, int sync); +struct hpsb_packet *hpsb_make_writepacket(struct hpsb_host *host, + nodeid_t node, u64 addr, + quadlet_t *buffer, size_t length); struct hpsb_packet *hpsb_make_streampacket(struct hpsb_host *host, u8 *buffer, - int length, int channel, int tag, int sync); + int length, int channel, int tag, + int sync); /* * hpsb_packet_success - Make sense of the ack and reply codes and @@ -40,9 +40,8 @@ struct hpsb_packet *hpsb_make_streampacket(struct hpsb_host *host, u8 *buffer, */ int hpsb_packet_success(struct hpsb_packet *packet); - /* - * The generic read, write and lock functions. All recognize the local node ID + * The generic read and write functions. All recognize the local node ID * and act accordingly. Read and write automatically use quadlet commands if * length == 4 and and block commands otherwise (however, they do not yet * support lengths that are not a multiple of 4). You must explicitly specifiy @@ -54,4 +53,8 @@ int hpsb_read(struct hpsb_host *host, nodeid_t node, unsigned int generation, int hpsb_write(struct hpsb_host *host, nodeid_t node, unsigned int generation, u64 addr, quadlet_t *buffer, size_t length); +#ifdef HPSB_DEBUG_TLABELS +extern spinlock_t hpsb_tlabel_lock; +#endif + #endif /* _IEEE1394_TRANSACTIONS_H */ diff --git a/drivers/ieee1394/ieee1394_types.h b/drivers/ieee1394/ieee1394_types.h index 3165609ec1e..9803aaa15be 100644 --- a/drivers/ieee1394/ieee1394_types.h +++ b/drivers/ieee1394/ieee1394_types.h @@ -1,37 +1,11 @@ - #ifndef _IEEE1394_TYPES_H #define _IEEE1394_TYPES_H #include <linux/kernel.h> -#include <linux/types.h> -#include <linux/list.h> -#include <linux/init.h> -#include <linux/spinlock.h> #include <linux/string.h> - -#include <asm/semaphore.h> +#include <linux/types.h> #include <asm/byteorder.h> - -/* Transaction Label handling */ -struct hpsb_tlabel_pool { - DECLARE_BITMAP(pool, 64); - spinlock_t lock; - u8 next; - u32 allocations; - struct semaphore count; -}; - -#define HPSB_TPOOL_INIT(_tp) \ -do { \ - bitmap_zero((_tp)->pool, 64); \ - spin_lock_init(&(_tp)->lock); \ - (_tp)->next = 0; \ - (_tp)->allocations = 0; \ - sema_init(&(_tp)->count, 63); \ -} while (0) - - typedef u32 quadlet_t; typedef u64 octlet_t; typedef u16 nodeid_t; @@ -54,46 +28,40 @@ typedef u16 arm_length_t; #define NODE_BUS_ARGS(__host, __nodeid) \ __host->id, NODEID_TO_NODE(__nodeid), NODEID_TO_BUS(__nodeid) -#define HPSB_PRINT(level, fmt, args...) printk(level "ieee1394: " fmt "\n" , ## args) +#define HPSB_PRINT(level, fmt, args...) \ + printk(level "ieee1394: " fmt "\n" , ## args) -#define HPSB_DEBUG(fmt, args...) HPSB_PRINT(KERN_DEBUG, fmt , ## args) -#define HPSB_INFO(fmt, args...) HPSB_PRINT(KERN_INFO, fmt , ## args) -#define HPSB_NOTICE(fmt, args...) HPSB_PRINT(KERN_NOTICE, fmt , ## args) -#define HPSB_WARN(fmt, args...) HPSB_PRINT(KERN_WARNING, fmt , ## args) -#define HPSB_ERR(fmt, args...) HPSB_PRINT(KERN_ERR, fmt , ## args) +#define HPSB_DEBUG(fmt, args...) HPSB_PRINT(KERN_DEBUG, fmt , ## args) +#define HPSB_INFO(fmt, args...) HPSB_PRINT(KERN_INFO, fmt , ## args) +#define HPSB_NOTICE(fmt, args...) HPSB_PRINT(KERN_NOTICE, fmt , ## args) +#define HPSB_WARN(fmt, args...) HPSB_PRINT(KERN_WARNING, fmt , ## args) +#define HPSB_ERR(fmt, args...) HPSB_PRINT(KERN_ERR, fmt , ## args) #ifdef CONFIG_IEEE1394_VERBOSEDEBUG -#define HPSB_VERBOSE(fmt, args...) HPSB_PRINT(KERN_DEBUG, fmt , ## args) +#define HPSB_VERBOSE(fmt, args...) HPSB_PRINT(KERN_DEBUG, fmt , ## args) +#define HPSB_DEBUG_TLABELS #else -#define HPSB_VERBOSE(fmt, args...) +#define HPSB_VERBOSE(fmt, args...) do {} while (0) #endif -#define HPSB_PANIC(fmt, args...) panic("ieee1394: " fmt "\n" , ## args) - -#define HPSB_TRACE() HPSB_PRINT(KERN_INFO, "TRACE - %s, %s(), line %d", __FILE__, __FUNCTION__, __LINE__) - - #ifdef __BIG_ENDIAN -static __inline__ void *memcpy_le32(u32 *dest, const u32 *__src, size_t count) +static inline void *memcpy_le32(u32 *dest, const u32 *__src, size_t count) { - void *tmp = dest; + void *tmp = dest; u32 *src = (u32 *)__src; - count /= 4; - - while (count--) { - *dest++ = swab32p(src++); - } - - return tmp; + count /= 4; + while (count--) + *dest++ = swab32p(src++); + return tmp; } #else static __inline__ void *memcpy_le32(u32 *dest, const u32 *src, size_t count) { - return memcpy(dest, src, count); + return memcpy(dest, src, count); } #endif /* __BIG_ENDIAN */ diff --git a/drivers/ieee1394/iso.c b/drivers/ieee1394/iso.c index f26680ebef7..08bd15d2a7b 100644 --- a/drivers/ieee1394/iso.c +++ b/drivers/ieee1394/iso.c @@ -9,8 +9,11 @@ * directory of the kernel sources for details. */ -#include <linux/slab.h> +#include <linux/pci.h> #include <linux/sched.h> +#include <linux/slab.h> + +#include "hosts.h" #include "iso.h" void hpsb_iso_stop(struct hpsb_iso *iso) diff --git a/drivers/ieee1394/iso.h b/drivers/ieee1394/iso.h index 3efc60b33a8..1210a97e868 100644 --- a/drivers/ieee1394/iso.h +++ b/drivers/ieee1394/iso.h @@ -12,33 +12,40 @@ #ifndef IEEE1394_ISO_H #define IEEE1394_ISO_H -#include "hosts.h" +#include <linux/spinlock_types.h> +#include <asm/atomic.h> +#include <asm/types.h> + #include "dma.h" -/* high-level ISO interface */ +struct hpsb_host; -/* This API sends and receives isochronous packets on a large, - virtually-contiguous kernel memory buffer. The buffer may be mapped - into a user-space process for zero-copy transmission and reception. +/* high-level ISO interface */ - There are no explicit boundaries between packets in the buffer. A - packet may be transmitted or received at any location. However, - low-level drivers may impose certain restrictions on alignment or - size of packets. (e.g. in OHCI no packet may cross a page boundary, - and packets should be quadlet-aligned) -*/ +/* + * This API sends and receives isochronous packets on a large, + * virtually-contiguous kernel memory buffer. The buffer may be mapped + * into a user-space process for zero-copy transmission and reception. + * + * There are no explicit boundaries between packets in the buffer. A + * packet may be transmitted or received at any location. However, + * low-level drivers may impose certain restrictions on alignment or + * size of packets. (e.g. in OHCI no packet may cross a page boundary, + * and packets should be quadlet-aligned) + */ /* Packet descriptor - the API maintains a ring buffer of these packet - descriptors in kernel memory (hpsb_iso.infos[]). */ - + * descriptors in kernel memory (hpsb_iso.infos[]). */ struct hpsb_iso_packet_info { /* offset of data payload relative to the first byte of the buffer */ __u32 offset; - /* length of the data payload, in bytes (not including the isochronous header) */ + /* length of the data payload, in bytes (not including the isochronous + * header) */ __u16 len; - /* (recv only) the cycle number (mod 8000) on which the packet was received */ + /* (recv only) the cycle number (mod 8000) on which the packet was + * received */ __u16 cycle; /* (recv only) channel on which the packet was received */ @@ -48,12 +55,10 @@ struct hpsb_iso_packet_info { __u8 tag; __u8 sy; - /* - * length in bytes of the packet including header/trailer. - * MUST be at structure end, since the first part of this structure is also - * defined in raw1394.h (i.e. struct raw1394_iso_packet_info), is copied to - * userspace and is accessed there through libraw1394. - */ + /* length in bytes of the packet including header/trailer. + * MUST be at structure end, since the first part of this structure is + * also defined in raw1394.h (i.e. struct raw1394_iso_packet_info), is + * copied to userspace and is accessed there through libraw1394. */ __u16 total_len; }; @@ -75,8 +80,8 @@ struct hpsb_iso { void *hostdata; /* a function to be called (from interrupt context) after - outgoing packets have been sent, or incoming packets have - arrived */ + * outgoing packets have been sent, or incoming packets have + * arrived */ void (*callback)(struct hpsb_iso*); /* wait for buffer space */ @@ -88,7 +93,7 @@ struct hpsb_iso { /* greatest # of packets between interrupts - controls - the maximum latency of the buffer */ + * the maximum latency of the buffer */ int irq_interval; /* the buffer for packet data payloads */ @@ -112,8 +117,8 @@ struct hpsb_iso { int pkt_dma; /* how many packets, starting at first_packet: - (transmit) are ready to be filled with data - (receive) contain received data */ + * (transmit) are ready to be filled with data + * (receive) contain received data */ int n_ready_packets; /* how many times the buffer has overflowed or underflowed */ @@ -134,7 +139,7 @@ struct hpsb_iso { int start_cycle; /* cycle at which next packet will be transmitted, - -1 if not known */ + * -1 if not known */ int xmit_cycle; /* ringbuffer of packet descriptors in regular kernel memory @@ -170,25 +175,30 @@ int hpsb_iso_recv_unlisten_channel(struct hpsb_iso *iso, unsigned char channel); int hpsb_iso_recv_set_channel_mask(struct hpsb_iso *iso, u64 mask); /* start/stop DMA */ -int hpsb_iso_xmit_start(struct hpsb_iso *iso, int start_on_cycle, int prebuffer); -int hpsb_iso_recv_start(struct hpsb_iso *iso, int start_on_cycle, int tag_mask, int sync); +int hpsb_iso_xmit_start(struct hpsb_iso *iso, int start_on_cycle, + int prebuffer); +int hpsb_iso_recv_start(struct hpsb_iso *iso, int start_on_cycle, + int tag_mask, int sync); void hpsb_iso_stop(struct hpsb_iso *iso); /* deallocate buffer and DMA context */ void hpsb_iso_shutdown(struct hpsb_iso *iso); -/* queue a packet for transmission. 'offset' is relative to the beginning of the - DMA buffer, where the packet's data payload should already have been placed */ -int hpsb_iso_xmit_queue_packet(struct hpsb_iso *iso, u32 offset, u16 len, u8 tag, u8 sy); +/* queue a packet for transmission. + * 'offset' is relative to the beginning of the DMA buffer, where the packet's + * data payload should already have been placed. */ +int hpsb_iso_xmit_queue_packet(struct hpsb_iso *iso, u32 offset, u16 len, + u8 tag, u8 sy); /* wait until all queued packets have been transmitted to the bus */ int hpsb_iso_xmit_sync(struct hpsb_iso *iso); /* N packets have been read out of the buffer, re-use the buffer space */ -int hpsb_iso_recv_release_packets(struct hpsb_iso *recv, unsigned int n_packets); +int hpsb_iso_recv_release_packets(struct hpsb_iso *recv, + unsigned int n_packets); /* check for arrival of new packets immediately (even if irq_interval - has not yet been reached) */ + * has not yet been reached) */ int hpsb_iso_recv_flush(struct hpsb_iso *iso); /* returns # of packets ready to send or receive */ @@ -197,14 +207,15 @@ int hpsb_iso_n_ready(struct hpsb_iso *iso); /* the following are callbacks available to low-level drivers */ /* call after a packet has been transmitted to the bus (interrupt context is OK) - 'cycle' is the _exact_ cycle the packet was sent on - 'error' should be non-zero if some sort of error occurred when sending the packet -*/ + * 'cycle' is the _exact_ cycle the packet was sent on + * 'error' should be non-zero if some sort of error occurred when sending the + * packet */ void hpsb_iso_packet_sent(struct hpsb_iso *iso, int cycle, int error); /* call after a packet has been received (interrupt context OK) */ void hpsb_iso_packet_received(struct hpsb_iso *iso, u32 offset, u16 len, - u16 total_len, u16 cycle, u8 channel, u8 tag, u8 sy); + u16 total_len, u16 cycle, u8 channel, u8 tag, + u8 sy); /* call to wake waiting processes after buffer space has opened up. */ void hpsb_iso_wake(struct hpsb_iso *iso); diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c index d541b508a15..3e7974c5744 100644 --- a/drivers/ieee1394/nodemgr.c +++ b/drivers/ieee1394/nodemgr.c @@ -12,26 +12,23 @@ #include <linux/kernel.h> #include <linux/list.h> #include <linux/slab.h> -#include <linux/smp_lock.h> -#include <linux/interrupt.h> -#include <linux/kmod.h> -#include <linux/completion.h> #include <linux/delay.h> -#include <linux/pci.h> +#include <linux/kthread.h> #include <linux/moduleparam.h> #include <asm/atomic.h> -#include "ieee1394_types.h" +#include "csr.h" +#include "highlevel.h" +#include "hosts.h" #include "ieee1394.h" #include "ieee1394_core.h" -#include "hosts.h" +#include "ieee1394_hotplug.h" +#include "ieee1394_types.h" #include "ieee1394_transactions.h" -#include "highlevel.h" -#include "csr.h" #include "nodemgr.h" static int ignore_drivers; -module_param(ignore_drivers, int, 0444); +module_param(ignore_drivers, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers."); struct nodemgr_csr_info { @@ -71,7 +68,7 @@ static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr, u8 i, *speed, old_speed, good_speed; int ret; - speed = ci->host->speed + NODEID_TO_NODE(ci->nodeid); + speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]); old_speed = *speed; good_speed = IEEE1394_SPEED_MAX + 1; @@ -161,16 +158,12 @@ static struct csr1212_bus_ops nodemgr_csr_ops = { * but now we are much simpler because of the LDM. */ -static DECLARE_MUTEX(nodemgr_serialize); +static DEFINE_MUTEX(nodemgr_serialize); struct host_info { struct hpsb_host *host; struct list_head list; - struct completion exited; - struct semaphore reset_sem; - int pid; - char daemon_name[15]; - int kill_me; + struct task_struct *thread; }; static int nodemgr_bus_match(struct device * dev, struct device_driver * drv); @@ -334,34 +327,44 @@ static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribut static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL); -/* tlabels_free, tlabels_allocations, tlabels_mask are read non-atomically - * here, therefore displayed values may be occasionally wrong. */ -static ssize_t fw_show_ne_tlabels_free(struct device *dev, struct device_attribute *attr, char *buf) +#ifdef HPSB_DEBUG_TLABELS +static ssize_t fw_show_ne_tlabels_free(struct device *dev, + struct device_attribute *attr, char *buf) { struct node_entry *ne = container_of(dev, struct node_entry, device); - return sprintf(buf, "%d\n", 64 - bitmap_weight(ne->tpool->pool, 64)); -} -static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); + unsigned long flags; + unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; + int tf; + spin_lock_irqsave(&hpsb_tlabel_lock, flags); + tf = 64 - bitmap_weight(tp, 64); + spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); -static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct node_entry *ne = container_of(dev, struct node_entry, device); - return sprintf(buf, "%u\n", ne->tpool->allocations); + return sprintf(buf, "%d\n", tf); } -static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL); +static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); -static ssize_t fw_show_ne_tlabels_mask(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t fw_show_ne_tlabels_mask(struct device *dev, + struct device_attribute *attr, char *buf) { struct node_entry *ne = container_of(dev, struct node_entry, device); + unsigned long flags; + unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; + u64 tm; + + spin_lock_irqsave(&hpsb_tlabel_lock, flags); #if (BITS_PER_LONG <= 32) - return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]); + tm = ((u64)tp[0] << 32) + tp[1]; #else - return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]); + tm = tp[0]; #endif + spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); + + return sprintf(buf, "0x%016llx\n", tm); } static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL); +#endif /* HPSB_DEBUG_TLABELS */ static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) @@ -408,26 +411,11 @@ static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf) } static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node); -static int nodemgr_rescan_bus_thread(void *__unused) -{ - /* No userlevel access needed */ - daemonize("kfwrescan"); - - bus_rescan_devices(&ieee1394_bus_type); - - return 0; -} static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count) { - int state = simple_strtoul(buf, NULL, 10); - - /* Don't wait for this, or care about errors. Root could do - * something stupid and spawn this a lot of times, but that's - * root's fault. */ - if (state == 1) - kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL); - + if (simple_strtoul(buf, NULL, 10) == 1) + bus_rescan_devices(&ieee1394_bus_type); return count; } static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) @@ -483,9 +471,10 @@ static struct device_attribute *const fw_ne_attrs[] = { &dev_attr_ne_vendor_id, &dev_attr_ne_nodeid, &dev_attr_bus_options, +#ifdef HPSB_DEBUG_TLABELS &dev_attr_tlabels_free, - &dev_attr_tlabels_allocations, &dev_attr_tlabels_mask, +#endif }; @@ -804,8 +793,6 @@ static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr if (!ne) return NULL; - ne->tpool = &host->tpool[nodeid & NODE_MASK]; - ne->host = host; ne->nodeid = nodeid; ne->generation = generation; @@ -1251,6 +1238,7 @@ static void nodemgr_node_scan_one(struct host_info *hi, octlet_t guid; struct csr1212_csr *csr; struct nodemgr_csr_info *ci; + u8 *speed; ci = kmalloc(sizeof(*ci), GFP_KERNEL); if (!ci) @@ -1259,8 +1247,12 @@ static void nodemgr_node_scan_one(struct host_info *hi, ci->host = host; ci->nodeid = nodeid; ci->generation = generation; - ci->speed_unverified = - host->speed[NODEID_TO_NODE(nodeid)] > IEEE1394_SPEED_100; + + /* Prepare for speed probe which occurs when reading the ROM */ + speed = &(host->speed[NODEID_TO_NODE(nodeid)]); + if (*speed > host->csr.lnk_spd) + *speed = host->csr.lnk_spd; + ci->speed_unverified = *speed > IEEE1394_SPEED_100; /* We need to detect when the ConfigROM's generation has changed, * so we only update the node's info when it needs to be. */ @@ -1300,8 +1292,6 @@ static void nodemgr_node_scan_one(struct host_info *hi, nodemgr_create_node(guid, csr, hi, nodeid, generation); else nodemgr_update_node(ne, csr, hi, nodeid, generation); - - return; } @@ -1326,6 +1316,7 @@ static void nodemgr_node_scan(struct host_info *hi, int generation) } +/* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader. */ static void nodemgr_suspend_ne(struct node_entry *ne) { struct class_device *cdev; @@ -1361,6 +1352,7 @@ static void nodemgr_resume_ne(struct node_entry *ne) ne->in_limbo = 0; device_remove_file(&ne->device, &dev_attr_ne_in_limbo); + down_read(&nodemgr_ud_class.subsys.rwsem); down_read(&ne->device.bus->subsys.rwsem); list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { ud = container_of(cdev, struct unit_directory, class_dev); @@ -1372,21 +1364,21 @@ static void nodemgr_resume_ne(struct node_entry *ne) ud->device.driver->resume(&ud->device); } up_read(&ne->device.bus->subsys.rwsem); + up_read(&nodemgr_ud_class.subsys.rwsem); HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); } +/* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader. */ static void nodemgr_update_pdrv(struct node_entry *ne) { struct unit_directory *ud; struct hpsb_protocol_driver *pdrv; - struct class *class = &nodemgr_ud_class; struct class_device *cdev; - down_read(&class->subsys.rwsem); - list_for_each_entry(cdev, &class->children, node) { + list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { ud = container_of(cdev, struct unit_directory, class_dev); if (ud->ne != ne || !ud->device.driver) continue; @@ -1399,7 +1391,6 @@ static void nodemgr_update_pdrv(struct node_entry *ne) up_write(&ud->device.bus->subsys.rwsem); } } - up_read(&class->subsys.rwsem); } @@ -1430,6 +1421,8 @@ static void nodemgr_irm_write_bc(struct node_entry *ne, int generation) } +/* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader because the + * calls to nodemgr_update_pdrv() and nodemgr_suspend_ne() here require it. */ static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation) { struct device *dev; @@ -1492,9 +1485,8 @@ static void nodemgr_node_probe(struct host_info *hi, int generation) /* If we had a bus reset while we were scanning the bus, it is * possible that we did not probe all nodes. In that case, we * skip the clean up for now, since we could remove nodes that - * were still on the bus. The bus reset increased hi->reset_sem, - * so there's a bus scan pending which will do the clean up - * eventually. + * were still on the bus. Another bus scan is pending which will + * do the clean up eventually. * * Now let's tell the bus to rescan our devices. This may seem * like overhead, but the driver-model core will only scan a @@ -1622,41 +1614,37 @@ static int nodemgr_host_thread(void *__hi) { struct host_info *hi = (struct host_info *)__hi; struct hpsb_host *host = hi->host; - int reset_cycles = 0; - - /* No userlevel access needed */ - daemonize(hi->daemon_name); + unsigned int g, generation = get_hpsb_generation(host) - 1; + int i, reset_cycles = 0; /* Setup our device-model entries */ nodemgr_create_host_dev_files(host); - /* Sit and wait for a signal to probe the nodes on the bus. This - * happens when we get a bus reset. */ - while (1) { - unsigned int generation = 0; - int i; + for (;;) { + /* Sleep until next bus reset */ + set_current_state(TASK_INTERRUPTIBLE); + if (get_hpsb_generation(host) == generation) + schedule(); + __set_current_state(TASK_RUNNING); + + /* Thread may have been woken up to freeze or to exit */ + if (try_to_freeze()) + continue; + if (kthread_should_stop()) + goto exit; - if (down_interruptible(&hi->reset_sem) || - down_interruptible(&nodemgr_serialize)) { + if (mutex_lock_interruptible(&nodemgr_serialize)) { if (try_to_freeze()) continue; - printk("NodeMgr: received unexpected signal?!\n" ); - break; - } - - if (hi->kill_me) { - up(&nodemgr_serialize); - break; + goto exit; } /* Pause for 1/4 second in 1/16 second intervals, * to make sure things settle down. */ + g = get_hpsb_generation(host); for (i = 0; i < 4 ; i++) { - set_current_state(TASK_INTERRUPTIBLE); - if (msleep_interruptible(63)) { - up(&nodemgr_serialize); - goto caught_signal; - } + if (msleep_interruptible(63) || kthread_should_stop()) + goto unlock_exit; /* Now get the generation in which the node ID's we collect * are valid. During the bus scan we will use this generation @@ -1667,20 +1655,14 @@ static int nodemgr_host_thread(void *__hi) /* If we get a reset before we are done waiting, then * start the the waiting over again */ - while (!down_trylock(&hi->reset_sem)) - i = 0; - - /* Check the kill_me again */ - if (hi->kill_me) { - up(&nodemgr_serialize); - goto caught_signal; - } + if (generation != g) + g = generation, i = 0; } if (!nodemgr_check_irm_capability(host, reset_cycles) || !nodemgr_do_irm_duties(host, reset_cycles)) { reset_cycles++; - up(&nodemgr_serialize); + mutex_unlock(&nodemgr_serialize); continue; } reset_cycles = 0; @@ -1698,13 +1680,13 @@ static int nodemgr_host_thread(void *__hi) /* Update some of our sysfs symlinks */ nodemgr_update_host_dev_links(host); - up(&nodemgr_serialize); + mutex_unlock(&nodemgr_serialize); } - -caught_signal: +unlock_exit: + mutex_unlock(&nodemgr_serialize); +exit: HPSB_VERBOSE("NodeMgr: Exiting thread"); - - complete_and_exit(&hi->exited, 0); + return 0; } int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *)) @@ -1764,41 +1746,27 @@ static void nodemgr_add_host(struct hpsb_host *host) struct host_info *hi; hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi)); - if (!hi) { - HPSB_ERR ("NodeMgr: out of memory in add host"); + HPSB_ERR("NodeMgr: out of memory in add host"); return; } - hi->host = host; - init_completion(&hi->exited); - sema_init(&hi->reset_sem, 0); - - sprintf(hi->daemon_name, "knodemgrd_%d", host->id); - - hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL); - - if (hi->pid < 0) { - HPSB_ERR ("NodeMgr: failed to start %s thread for %s", - hi->daemon_name, host->driver->name); + hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d", + host->id); + if (IS_ERR(hi->thread)) { + HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id); hpsb_destroy_hostinfo(&nodemgr_highlevel, host); - return; } - - return; } static void nodemgr_host_reset(struct hpsb_host *host) { struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); - if (hi != NULL) { - HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name); - up(&hi->reset_sem); - } else - HPSB_ERR ("NodeMgr: could not process reset of unused host"); - - return; + if (hi) { + HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id); + wake_up_process(hi->thread); + } } static void nodemgr_remove_host(struct hpsb_host *host) @@ -1806,18 +1774,9 @@ static void nodemgr_remove_host(struct hpsb_host *host) struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); if (hi) { - if (hi->pid >= 0) { - hi->kill_me = 1; - mb(); - up(&hi->reset_sem); - wait_for_completion(&hi->exited); - nodemgr_remove_host_dev(&host->device); - } - } else - HPSB_ERR("NodeMgr: host %s does not exist, cannot remove", - host->driver->name); - - return; + kthread_stop(hi->thread); + nodemgr_remove_host_dev(&host->device); + } } static struct hpsb_highlevel nodemgr_highlevel = { diff --git a/drivers/ieee1394/nodemgr.h b/drivers/ieee1394/nodemgr.h index 0b26616e16c..0e1e7d93078 100644 --- a/drivers/ieee1394/nodemgr.h +++ b/drivers/ieee1394/nodemgr.h @@ -21,9 +21,15 @@ #define _IEEE1394_NODEMGR_H #include <linux/device.h> -#include "csr1212.h" +#include <asm/types.h> + #include "ieee1394_core.h" -#include "ieee1394_hotplug.h" +#include "ieee1394_types.h" + +struct csr1212_csr; +struct csr1212_keyval; +struct hpsb_host; +struct ieee1394_device_id; /* '1' '3' '9' '4' in ASCII */ #define IEEE1394_BUSID_MAGIC __constant_cpu_to_be32(0x31333934) @@ -44,7 +50,6 @@ struct bus_options { u16 max_rec; /* Maximum packet size node can receive */ }; - #define UNIT_DIRECTORY_VENDOR_ID 0x01 #define UNIT_DIRECTORY_MODEL_ID 0x02 #define UNIT_DIRECTORY_SPECIFIER_ID 0x04 @@ -59,8 +64,8 @@ struct bus_options { * unit directory for each of these protocols. */ struct unit_directory { - struct node_entry *ne; /* The node which this directory belongs to */ - octlet_t address; /* Address of the unit directory on the node */ + struct node_entry *ne; /* The node which this directory belongs to */ + octlet_t address; /* Address of the unit directory on the node */ u8 flags; /* Indicates which entries were read */ quadlet_t vendor_id; @@ -79,11 +84,10 @@ struct unit_directory { int length; /* Number of quadlets */ struct device device; - struct class_device class_dev; struct csr1212_keyval *ud_kv; - u32 lun; /* logical unit number immediate value */ + u32 lun; /* logical unit number immediate value */ }; struct node_entry { @@ -103,10 +107,8 @@ struct node_entry { const char *vendor_oui; u32 capabilities; - struct hpsb_tlabel_pool *tpool; struct device device; - struct class_device class_dev; /* Means this node is not attached anymore */ @@ -153,8 +155,8 @@ static inline int hpsb_node_entry_valid(struct node_entry *ne) /* * This will fill in the given, pre-initialised hpsb_packet with the current * information from the node entry (host, node ID, generation number). It will - * return false if the node owning the GUID is not accessible (and not modify the - * hpsb_packet) and return true otherwise. + * return false if the node owning the GUID is not accessible (and not modify + * the hpsb_packet) and return true otherwise. * * Note that packet sending may still fail in hpsb_send_packet if a bus reset * happens while you are trying to set up the packet (due to obsolete generation @@ -170,16 +172,13 @@ int hpsb_node_write(struct node_entry *ne, u64 addr, int hpsb_node_lock(struct node_entry *ne, u64 addr, int extcode, quadlet_t *data, quadlet_t arg); - /* Iterate the hosts, calling a given function with supplied data for each * host. */ int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *)); - int init_ieee1394_nodemgr(void); void cleanup_ieee1394_nodemgr(void); - /* The template for a host device */ extern struct device nodemgr_dev_template_host; diff --git a/drivers/ieee1394/ohci1394.c b/drivers/ieee1394/ohci1394.c index 448df277337..8fd0030475b 100644 --- a/drivers/ieee1394/ohci1394.c +++ b/drivers/ieee1394/ohci1394.c @@ -136,7 +136,7 @@ #define DBGMSG(fmt, args...) \ printk(KERN_INFO "%s: fw-host%d: " fmt "\n" , OHCI1394_DRIVER_NAME, ohci->host->id , ## args) #else -#define DBGMSG(fmt, args...) +#define DBGMSG(fmt, args...) do {} while (0) #endif #ifdef CONFIG_IEEE1394_OHCI_DMA_DEBUG @@ -148,8 +148,8 @@ printk(KERN_INFO "%s: fw-host%d: " fmt "\n" , OHCI1394_DRIVER_NAME, ohci->host-> --global_outstanding_dmas, ## args) static int global_outstanding_dmas = 0; #else -#define OHCI_DMA_ALLOC(fmt, args...) -#define OHCI_DMA_FREE(fmt, args...) +#define OHCI_DMA_ALLOC(fmt, args...) do {} while (0) +#define OHCI_DMA_FREE(fmt, args...) do {} while (0) #endif /* print general (card independent) information */ @@ -181,36 +181,35 @@ static int alloc_dma_trm_ctx(struct ti_ohci *ohci, struct dma_trm_ctx *d, static void ohci1394_pci_remove(struct pci_dev *pdev); #ifndef __LITTLE_ENDIAN -static unsigned hdr_sizes[] = -{ +const static size_t hdr_sizes[] = { 3, /* TCODE_WRITEQ */ 4, /* TCODE_WRITEB */ 3, /* TCODE_WRITE_RESPONSE */ - 0, /* ??? */ + 0, /* reserved */ 3, /* TCODE_READQ */ 4, /* TCODE_READB */ 3, /* TCODE_READQ_RESPONSE */ 4, /* TCODE_READB_RESPONSE */ - 1, /* TCODE_CYCLE_START (???) */ + 1, /* TCODE_CYCLE_START */ 4, /* TCODE_LOCK_REQUEST */ 2, /* TCODE_ISO_DATA */ 4, /* TCODE_LOCK_RESPONSE */ + /* rest is reserved or link-internal */ }; -/* Swap headers */ -static inline void packet_swab(quadlet_t *data, int tcode) +static inline void header_le32_to_cpu(quadlet_t *data, unsigned char tcode) { - size_t size = hdr_sizes[tcode]; + size_t size; - if (tcode > TCODE_LOCK_RESPONSE || hdr_sizes[tcode] == 0) + if (unlikely(tcode >= ARRAY_SIZE(hdr_sizes))) return; + size = hdr_sizes[tcode]; while (size--) - data[size] = swab32(data[size]); + data[size] = le32_to_cpu(data[size]); } #else -/* Don't waste cycles on same sex byte swaps */ -#define packet_swab(w,x) +#define header_le32_to_cpu(w,x) do {} while (0) #endif /* !LITTLE_ENDIAN */ /*********************************** @@ -701,7 +700,7 @@ static void insert_packet(struct ti_ohci *ohci, d->prg_cpu[idx]->data[2] = packet->header[2]; d->prg_cpu[idx]->data[3] = packet->header[3]; } - packet_swab(d->prg_cpu[idx]->data, packet->tcode); + header_le32_to_cpu(d->prg_cpu[idx]->data, packet->tcode); } if (packet->data_size) { /* block transmit */ @@ -777,7 +776,7 @@ static void insert_packet(struct ti_ohci *ohci, d->prg_cpu[idx]->data[0] = packet->speed_code<<16 | (packet->header[0] & 0xFFFF); d->prg_cpu[idx]->data[1] = packet->header[0] & 0xFFFF0000; - packet_swab(d->prg_cpu[idx]->data, packet->tcode); + header_le32_to_cpu(d->prg_cpu[idx]->data, packet->tcode); d->prg_cpu[idx]->begin.control = cpu_to_le32(DMA_CTL_OUTPUT_MORE | @@ -2598,8 +2597,9 @@ static const int TCODE_SIZE[16] = {20, 0, 16, -1, 16, 20, 20, 0, * Determine the length of a packet in the buffer * Optimization suggested by Pascal Drolet <pascal.drolet@informission.ca> */ -static __inline__ int packet_length(struct dma_rcv_ctx *d, int idx, quadlet_t *buf_ptr, - int offset, unsigned char tcode, int noswap) +static inline int packet_length(struct dma_rcv_ctx *d, int idx, + quadlet_t *buf_ptr, int offset, + unsigned char tcode, int noswap) { int length = -1; @@ -2730,7 +2730,7 @@ static void dma_rcv_tasklet (unsigned long data) * bus reset. We always ignore it. */ if (tcode != OHCI1394_TCODE_PHY) { if (!ohci->no_swap_incoming) - packet_swab(d->spb, tcode); + header_le32_to_cpu(d->spb, tcode); DBGMSG("Packet received from node" " %d ack=0x%02X spd=%d tcode=0x%X" " length=%d ctx=%d tlabel=%d", @@ -2738,7 +2738,7 @@ static void dma_rcv_tasklet (unsigned long data) (cond_le32_to_cpu(d->spb[length/4-1], ohci->no_swap_incoming)>>16)&0x1f, (cond_le32_to_cpu(d->spb[length/4-1], ohci->no_swap_incoming)>>21)&0x3, tcode, length, d->ctx, - (cond_le32_to_cpu(d->spb[0], ohci->no_swap_incoming)>>10)&0x3f); + (d->spb[0]>>10)&0x3f); ack = (((cond_le32_to_cpu(d->spb[length/4-1], ohci->no_swap_incoming)>>16)&0x1f) == 0x11) ? 1 : 0; @@ -3529,9 +3529,10 @@ static void ohci1394_pci_remove(struct pci_dev *pdev) put_device(dev); } - +#ifdef CONFIG_PM static int ohci1394_pci_resume (struct pci_dev *pdev) { +/* PowerMac resume code comes first */ #ifdef CONFIG_PPC_PMAC if (machine_is(powermac)) { struct device_node *of_node; @@ -3543,17 +3544,23 @@ static int ohci1394_pci_resume (struct pci_dev *pdev) } #endif /* CONFIG_PPC_PMAC */ + pci_set_power_state(pdev, PCI_D0); pci_restore_state(pdev); - pci_enable_device(pdev); - - return 0; + return pci_enable_device(pdev); } - static int ohci1394_pci_suspend (struct pci_dev *pdev, pm_message_t state) { - pci_save_state(pdev); + int err; + + err = pci_save_state(pdev); + if (err) + goto out; + err = pci_set_power_state(pdev, pci_choose_state(pdev, state)); + if (err) + goto out; +/* PowerMac suspend code comes last */ #ifdef CONFIG_PPC_PMAC if (machine_is(powermac)) { struct device_node *of_node; @@ -3563,11 +3570,11 @@ static int ohci1394_pci_suspend (struct pci_dev *pdev, pm_message_t state) if (of_node) pmac_call_feature(PMAC_FTR_1394_ENABLE, of_node, 0, 0); } -#endif - - return 0; +#endif /* CONFIG_PPC_PMAC */ +out: + return err; } - +#endif /* CONFIG_PM */ #define PCI_CLASS_FIREWIRE_OHCI ((PCI_CLASS_SERIAL_FIREWIRE << 8) | 0x10) @@ -3590,8 +3597,10 @@ static struct pci_driver ohci1394_pci_driver = { .id_table = ohci1394_pci_tbl, .probe = ohci1394_pci_probe, .remove = ohci1394_pci_remove, +#ifdef CONFIG_PM .resume = ohci1394_pci_resume, .suspend = ohci1394_pci_suspend, +#endif }; /*********************************** @@ -3718,5 +3727,7 @@ static int __init ohci1394_init(void) return pci_register_driver(&ohci1394_pci_driver); } -module_init(ohci1394_init); +/* Register before most other device drivers. + * Useful for remote debugging via physical DMA, e.g. using firescope. */ +fs_initcall(ohci1394_init); module_exit(ohci1394_cleanup); diff --git a/drivers/ieee1394/raw1394-private.h b/drivers/ieee1394/raw1394-private.h index c93587be9ca..c7731d1bcd8 100644 --- a/drivers/ieee1394/raw1394-private.h +++ b/drivers/ieee1394/raw1394-private.h @@ -29,9 +29,8 @@ struct file_info { struct list_head req_pending; struct list_head req_complete; - struct semaphore complete_sem; spinlock_t reqlists_lock; - wait_queue_head_t poll_wait_complete; + wait_queue_head_t wait_complete; struct list_head addr_list; diff --git a/drivers/ieee1394/raw1394.c b/drivers/ieee1394/raw1394.c index 571ea68c0cf..5ec4f5eb6b1 100644 --- a/drivers/ieee1394/raw1394.c +++ b/drivers/ieee1394/raw1394.c @@ -44,14 +44,15 @@ #include <linux/compat.h> #include "csr1212.h" +#include "highlevel.h" +#include "hosts.h" #include "ieee1394.h" -#include "ieee1394_types.h" #include "ieee1394_core.h" -#include "nodemgr.h" -#include "hosts.h" -#include "highlevel.h" -#include "iso.h" +#include "ieee1394_hotplug.h" #include "ieee1394_transactions.h" +#include "ieee1394_types.h" +#include "iso.h" +#include "nodemgr.h" #include "raw1394.h" #include "raw1394-private.h" @@ -66,7 +67,7 @@ #define DBGMSG(fmt, args...) \ printk(KERN_INFO "raw1394:" fmt "\n" , ## args) #else -#define DBGMSG(fmt, args...) +#define DBGMSG(fmt, args...) do {} while (0) #endif static LIST_HEAD(host_info_list); @@ -132,10 +133,9 @@ static void free_pending_request(struct pending_request *req) static void __queue_complete_req(struct pending_request *req) { struct file_info *fi = req->file_info; - list_move_tail(&req->list, &fi->req_complete); - up(&fi->complete_sem); - wake_up_interruptible(&fi->poll_wait_complete); + list_move_tail(&req->list, &fi->req_complete); + wake_up(&fi->wait_complete); } static void queue_complete_req(struct pending_request *req) @@ -463,13 +463,36 @@ raw1394_compat_read(const char __user *buf, struct raw1394_request *r) #endif +/* get next completed request (caller must hold fi->reqlists_lock) */ +static inline struct pending_request *__next_complete_req(struct file_info *fi) +{ + struct list_head *lh; + struct pending_request *req = NULL; + + if (!list_empty(&fi->req_complete)) { + lh = fi->req_complete.next; + list_del(lh); + req = list_entry(lh, struct pending_request, list); + } + return req; +} + +/* atomically get next completed request */ +static struct pending_request *next_complete_req(struct file_info *fi) +{ + unsigned long flags; + struct pending_request *req; + + spin_lock_irqsave(&fi->reqlists_lock, flags); + req = __next_complete_req(fi); + spin_unlock_irqrestore(&fi->reqlists_lock, flags); + return req; +} static ssize_t raw1394_read(struct file *file, char __user * buffer, size_t count, loff_t * offset_is_ignored) { - unsigned long flags; struct file_info *fi = (struct file_info *)file->private_data; - struct list_head *lh; struct pending_request *req; ssize_t ret; @@ -487,22 +510,21 @@ static ssize_t raw1394_read(struct file *file, char __user * buffer, } if (file->f_flags & O_NONBLOCK) { - if (down_trylock(&fi->complete_sem)) { + if (!(req = next_complete_req(fi))) return -EAGAIN; - } } else { - if (down_interruptible(&fi->complete_sem)) { + /* + * NB: We call the macro wait_event_interruptible() with a + * condition argument with side effect. This is only possible + * because the side effect does not occur until the condition + * became true, and wait_event_interruptible() won't evaluate + * the condition again after that. + */ + if (wait_event_interruptible(fi->wait_complete, + (req = next_complete_req(fi)))) return -ERESTARTSYS; - } } - spin_lock_irqsave(&fi->reqlists_lock, flags); - lh = fi->req_complete.next; - list_del(lh); - spin_unlock_irqrestore(&fi->reqlists_lock, flags); - - req = list_entry(lh, struct pending_request, list); - if (req->req.length) { if (copy_to_user(int2ptr(req->req.recvb), req->data, req->req.length)) { @@ -1752,6 +1774,7 @@ static int arm_register(struct file_info *fi, struct pending_request *req) addr->notification_options |= addr->client_transactions; addr->recvb = req->req.recvb; addr->rec_length = (u16) ((req->req.misc >> 16) & 0xFFFF); + spin_lock_irqsave(&host_info_lock, flags); hi = find_host_info(fi->host); same_host = 0; @@ -1777,9 +1800,9 @@ static int arm_register(struct file_info *fi, struct pending_request *req) } if (same_host) { /* addressrange occupied by same host */ + spin_unlock_irqrestore(&host_info_lock, flags); vfree(addr->addr_space_buffer); kfree(addr); - spin_unlock_irqrestore(&host_info_lock, flags); return (-EALREADY); } /* another host with valid address-entry containing same addressrange */ @@ -1807,6 +1830,8 @@ static int arm_register(struct file_info *fi, struct pending_request *req) } } } + spin_unlock_irqrestore(&host_info_lock, flags); + if (another_host) { DBGMSG("another hosts entry is valid -> SUCCESS"); if (copy_to_user(int2ptr(req->req.recvb), @@ -1815,11 +1840,11 @@ static int arm_register(struct file_info *fi, struct pending_request *req) " address-range-entry is invalid -> EFAULT !!!\n"); vfree(addr->addr_space_buffer); kfree(addr); - spin_unlock_irqrestore(&host_info_lock, flags); return (-EFAULT); } free_pending_request(req); /* immediate success or fail */ /* INSERT ENTRY */ + spin_lock_irqsave(&host_info_lock, flags); list_add_tail(&addr->addr_list, &fi->addr_list); spin_unlock_irqrestore(&host_info_lock, flags); return sizeof(struct raw1394_request); @@ -1830,15 +1855,15 @@ static int arm_register(struct file_info *fi, struct pending_request *req) req->req.address + req->req.length); if (retval) { /* INSERT ENTRY */ + spin_lock_irqsave(&host_info_lock, flags); list_add_tail(&addr->addr_list, &fi->addr_list); + spin_unlock_irqrestore(&host_info_lock, flags); } else { DBGMSG("arm_register failed errno: %d \n", retval); vfree(addr->addr_space_buffer); kfree(addr); - spin_unlock_irqrestore(&host_info_lock, flags); return (-EALREADY); } - spin_unlock_irqrestore(&host_info_lock, flags); free_pending_request(req); /* immediate success or fail */ return sizeof(struct raw1394_request); } @@ -1904,10 +1929,10 @@ static int arm_unregister(struct file_info *fi, struct pending_request *req) if (another_host) { DBGMSG("delete entry from list -> success"); list_del(&addr->addr_list); + spin_unlock_irqrestore(&host_info_lock, flags); vfree(addr->addr_space_buffer); kfree(addr); free_pending_request(req); /* immediate success or fail */ - spin_unlock_irqrestore(&host_info_lock, flags); return sizeof(struct raw1394_request); } retval = @@ -1949,23 +1974,19 @@ static int arm_get_buf(struct file_info *fi, struct pending_request *req) (arm_addr->end > req->req.address)) { if (req->req.address + req->req.length <= arm_addr->end) { offset = req->req.address - arm_addr->start; + spin_unlock_irqrestore(&host_info_lock, flags); DBGMSG ("arm_get_buf copy_to_user( %08X, %p, %u )", (u32) req->req.recvb, arm_addr->addr_space_buffer + offset, (u32) req->req.length); - if (copy_to_user (int2ptr(req->req.recvb), arm_addr->addr_space_buffer + offset, - req->req.length)) { - spin_unlock_irqrestore(&host_info_lock, - flags); + req->req.length)) return (-EFAULT); - } - spin_unlock_irqrestore(&host_info_lock, flags); /* We have to free the request, because we * queue no response, and therefore nobody * will free it. */ @@ -2005,24 +2026,23 @@ static int arm_set_buf(struct file_info *fi, struct pending_request *req) (arm_addr->end > req->req.address)) { if (req->req.address + req->req.length <= arm_addr->end) { offset = req->req.address - arm_addr->start; + spin_unlock_irqrestore(&host_info_lock, flags); DBGMSG ("arm_set_buf copy_from_user( %p, %08X, %u )", arm_addr->addr_space_buffer + offset, (u32) req->req.sendb, (u32) req->req.length); - if (copy_from_user (arm_addr->addr_space_buffer + offset, int2ptr(req->req.sendb), - req->req.length)) { - spin_unlock_irqrestore(&host_info_lock, - flags); + req->req.length)) return (-EFAULT); - } - spin_unlock_irqrestore(&host_info_lock, flags); - free_pending_request(req); /* we have to free the request, because we queue no response, and therefore nobody will free it */ + /* We have to free the request, because we + * queue no response, and therefore nobody + * will free it. */ + free_pending_request(req); return sizeof(struct raw1394_request); } else { DBGMSG("arm_set_buf request exceeded mapping"); @@ -2744,7 +2764,7 @@ static unsigned int raw1394_poll(struct file *file, poll_table * pt) unsigned int mask = POLLOUT | POLLWRNORM; unsigned long flags; - poll_wait(file, &fi->poll_wait_complete, pt); + poll_wait(file, &fi->wait_complete, pt); spin_lock_irqsave(&fi->reqlists_lock, flags); if (!list_empty(&fi->req_complete)) { @@ -2769,9 +2789,8 @@ static int raw1394_open(struct inode *inode, struct file *file) fi->state = opened; INIT_LIST_HEAD(&fi->req_pending); INIT_LIST_HEAD(&fi->req_complete); - sema_init(&fi->complete_sem, 0); spin_lock_init(&fi->reqlists_lock); - init_waitqueue_head(&fi->poll_wait_complete); + init_waitqueue_head(&fi->wait_complete); INIT_LIST_HEAD(&fi->addr_list); file->private_data = fi; @@ -2784,7 +2803,7 @@ static int raw1394_release(struct inode *inode, struct file *file) struct file_info *fi = file->private_data; struct list_head *lh; struct pending_request *req; - int done = 0, i, fail = 0; + int i, fail; int retval = 0; struct list_head *entry; struct arm_addr *addr = NULL; @@ -2864,25 +2883,28 @@ static int raw1394_release(struct inode *inode, struct file *file) "error(s) occurred \n"); } - while (!done) { + for (;;) { + /* This locked section guarantees that neither + * complete nor pending requests exist once i!=0 */ spin_lock_irqsave(&fi->reqlists_lock, flags); - - while (!list_empty(&fi->req_complete)) { - lh = fi->req_complete.next; - list_del(lh); - - req = list_entry(lh, struct pending_request, list); - + while ((req = __next_complete_req(fi))) free_pending_request(req); - } - - if (list_empty(&fi->req_pending)) - done = 1; + i = list_empty(&fi->req_pending); spin_unlock_irqrestore(&fi->reqlists_lock, flags); - if (!done) - down_interruptible(&fi->complete_sem); + if (i) + break; + /* + * Sleep until more requests can be freed. + * + * NB: We call the macro wait_event() with a condition argument + * with side effect. This is only possible because the side + * effect does not occur until the condition became true, and + * wait_event() won't evaluate the condition again after that. + */ + wait_event(fi->wait_complete, (req = next_complete_req(fi))); + free_pending_request(req); } /* Remove any sub-trees left by user space programs */ diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c index b08755e2e68..6986ac18828 100644 --- a/drivers/ieee1394/sbp2.c +++ b/drivers/ieee1394/sbp2.c @@ -38,31 +38,36 @@ * but the code needs additional debugging. */ +#include <linux/blkdev.h> +#include <linux/compiler.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/dma-mapping.h> +#include <linux/gfp.h> +#include <linux/init.h> #include <linux/kernel.h> #include <linux/list.h> -#include <linux/string.h> -#include <linux/stringify.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/fs.h> -#include <linux/poll.h> #include <linux/module.h> #include <linux/moduleparam.h> -#include <linux/types.h> -#include <linux/delay.h> -#include <linux/sched.h> -#include <linux/blkdev.h> -#include <linux/smp_lock.h> -#include <linux/init.h> #include <linux/pci.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/stringify.h> +#include <linux/types.h> +#include <linux/wait.h> -#include <asm/current.h> -#include <asm/uaccess.h> -#include <asm/io.h> #include <asm/byteorder.h> -#include <asm/atomic.h> -#include <asm/system.h> +#include <asm/errno.h> +#include <asm/param.h> #include <asm/scatterlist.h> +#include <asm/system.h> +#include <asm/types.h> + +#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA +#include <asm/io.h> /* for bus_to_virt */ +#endif #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> @@ -71,13 +76,14 @@ #include <scsi/scsi_host.h> #include "csr1212.h" +#include "highlevel.h" +#include "hosts.h" #include "ieee1394.h" -#include "ieee1394_types.h" #include "ieee1394_core.h" -#include "nodemgr.h" -#include "hosts.h" -#include "highlevel.h" +#include "ieee1394_hotplug.h" #include "ieee1394_transactions.h" +#include "ieee1394_types.h" +#include "nodemgr.h" #include "sbp2.h" /* @@ -173,11 +179,6 @@ MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) ", or a combination)"); -/* legacy parameter */ -static int force_inquiry_hack; -module_param(force_inquiry_hack, int, 0644); -MODULE_PARM_DESC(force_inquiry_hack, "Deprecated, use 'workarounds'"); - /* * Export information about protocols/devices supported by this driver. */ @@ -208,9 +209,9 @@ static u32 global_outstanding_command_orbs = 0; #define outstanding_orb_incr global_outstanding_command_orbs++ #define outstanding_orb_decr global_outstanding_command_orbs-- #else -#define SBP2_ORB_DEBUG(fmt, args...) -#define outstanding_orb_incr -#define outstanding_orb_decr +#define SBP2_ORB_DEBUG(fmt, args...) do {} while (0) +#define outstanding_orb_incr do {} while (0) +#define outstanding_orb_decr do {} while (0) #endif #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA @@ -222,8 +223,8 @@ static u32 global_outstanding_command_orbs = 0; --global_outstanding_dmas, ## args) static u32 global_outstanding_dmas = 0; #else -#define SBP2_DMA_ALLOC(fmt, args...) -#define SBP2_DMA_FREE(fmt, args...) +#define SBP2_DMA_ALLOC(fmt, args...) do {} while (0) +#define SBP2_DMA_FREE(fmt, args...) do {} while (0) #endif #if CONFIG_IEEE1394_SBP2_DEBUG >= 2 @@ -237,7 +238,7 @@ static u32 global_outstanding_dmas = 0; #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) #else -#define SBP2_DEBUG(fmt, args...) +#define SBP2_DEBUG(fmt, args...) do {} while (0) #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) @@ -356,7 +357,7 @@ static const struct { /* * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. */ -static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length) +static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length) { u32 *temp = buffer; @@ -369,7 +370,7 @@ static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length) /* * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. */ -static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length) +static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length) { u32 *temp = buffer; @@ -380,8 +381,8 @@ static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length) } #else /* BIG_ENDIAN */ /* Why waste the cpu cycles? */ -#define sbp2util_be32_to_cpu_buffer(x,y) -#define sbp2util_cpu_to_be32_buffer(x,y) +#define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0) +#define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0) #endif #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP @@ -417,24 +418,26 @@ static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, return; } #else -#define sbp2util_packet_dump(w,x,y,z) +#define sbp2util_packet_dump(w,x,y,z) do {} while (0) #endif +static DECLARE_WAIT_QUEUE_HEAD(access_wq); + /* - * Goofy routine that basically does a down_timeout function. + * Waits for completion of an SBP-2 access request. + * Returns nonzero if timed out or prematurely interrupted. */ -static int sbp2util_down_timeout(atomic_t *done, int timeout) +static int sbp2util_access_timeout(struct scsi_id_instance_data *scsi_id, + int timeout) { - int i; + long leftover = wait_event_interruptible_timeout( + access_wq, scsi_id->access_complete, timeout); - for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) { - if (msleep_interruptible(100)) /* 100ms */ - return 1; - } - return (i > 0) ? 0 : 1; + scsi_id->access_complete = 0; + return leftover <= 0; } -/* Free's an allocated packet */ +/* Frees an allocated packet */ static void sbp2_free_packet(struct hpsb_packet *packet) { hpsb_free_tlabel(packet); @@ -468,6 +471,44 @@ static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, return 0; } +static void sbp2util_notify_fetch_agent(struct scsi_id_instance_data *scsi_id, + u64 offset, quadlet_t *data, size_t len) +{ + /* + * There is a small window after a bus reset within which the node + * entry's generation is current but the reconnect wasn't completed. + */ + if (unlikely(atomic_read(&scsi_id->state) == SBP2LU_STATE_IN_RESET)) + return; + + if (hpsb_node_write(scsi_id->ne, + scsi_id->sbp2_command_block_agent_addr + offset, + data, len)) + SBP2_ERR("sbp2util_notify_fetch_agent failed."); + /* + * Now accept new SCSI commands, unless a bus reset happended during + * hpsb_node_write. + */ + if (likely(atomic_read(&scsi_id->state) != SBP2LU_STATE_IN_RESET)) + scsi_unblock_requests(scsi_id->scsi_host); +} + +static void sbp2util_write_orb_pointer(void *p) +{ + quadlet_t data[2]; + + data[0] = ORB_SET_NODE_ID( + ((struct scsi_id_instance_data *)p)->hi->host->node_id); + data[1] = ((struct scsi_id_instance_data *)p)->last_orb_dma; + sbp2util_cpu_to_be32_buffer(data, 8); + sbp2util_notify_fetch_agent(p, SBP2_ORB_POINTER_OFFSET, data, 8); +} + +static void sbp2util_write_doorbell(void *p) +{ + sbp2util_notify_fetch_agent(p, SBP2_DOORBELL_OFFSET, NULL, 4); +} + /* * This function is called to create a pool of command orbs used for * command processing. It is called when a new sbp2 device is detected. @@ -492,7 +533,7 @@ static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_i command->command_orb_dma = pci_map_single(hi->host->pdev, &command->command_orb, sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); + PCI_DMA_TODEVICE); SBP2_DMA_ALLOC("single command orb DMA"); command->sge_dma = pci_map_single(hi->host->pdev, @@ -525,7 +566,7 @@ static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_ /* Release our generic DMA's */ pci_unmap_single(host->pdev, command->command_orb_dma, sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); + PCI_DMA_TODEVICE); SBP2_DMA_FREE("single command orb DMA"); pci_unmap_single(host->pdev, command->sge_dma, sizeof(command->scatter_gather_element), @@ -715,6 +756,7 @@ static int sbp2_remove(struct device *dev) sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT); /* scsi_remove_device() will trigger shutdown functions of SCSI * highlevel drivers which would deadlock if blocked. */ + atomic_set(&scsi_id->state, SBP2LU_STATE_IN_SHUTDOWN); scsi_unblock_requests(scsi_id->scsi_host); } sdev = scsi_id->sdev; @@ -766,10 +808,12 @@ static int sbp2_update(struct unit_directory *ud) */ sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); - /* Make sure we unblock requests (since this is likely after a bus - * reset). */ - scsi_unblock_requests(scsi_id->scsi_host); - + /* Accept new commands unless there was another bus reset in the + * meantime. */ + if (hpsb_node_entry_valid(scsi_id->ne)) { + atomic_set(&scsi_id->state, SBP2LU_STATE_RUNNING); + scsi_unblock_requests(scsi_id->scsi_host); + } return 0; } @@ -794,11 +838,12 @@ static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud scsi_id->speed_code = IEEE1394_SPEED_100; scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; scsi_id->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; - atomic_set(&scsi_id->sbp2_login_complete, 0); INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); INIT_LIST_HEAD(&scsi_id->scsi_list); spin_lock_init(&scsi_id->sbp2_command_orb_lock); + atomic_set(&scsi_id->state, SBP2LU_STATE_RUNNING); + INIT_WORK(&scsi_id->protocol_work, NULL, NULL); ud->device.driver_data = scsi_id; @@ -881,11 +926,14 @@ static void sbp2_host_reset(struct hpsb_host *host) struct scsi_id_instance_data *scsi_id; hi = hpsb_get_hostinfo(&sbp2_highlevel, host); - - if (hi) { - list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) + if (!hi) + return; + list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) + if (likely(atomic_read(&scsi_id->state) != + SBP2LU_STATE_IN_SHUTDOWN)) { + atomic_set(&scsi_id->state, SBP2LU_STATE_IN_RESET); scsi_block_requests(scsi_id->scsi_host); - } + } } /* @@ -970,8 +1018,7 @@ static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) * connected to the sbp2 device being removed. That host would * have a certain amount of time to relogin before the sbp2 device * allows someone else to login instead. One second makes sense. */ - msleep_interruptible(1000); - if (signal_pending(current)) { + if (msleep_interruptible(1000)) { sbp2_remove_device(scsi_id); return -EINTR; } @@ -1036,7 +1083,7 @@ static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) scsi_remove_host(scsi_id->scsi_host); scsi_host_put(scsi_id->scsi_host); } - + flush_scheduled_work(); sbp2util_remove_command_orb_pool(scsi_id); list_del(&scsi_id->scsi_list); @@ -1182,17 +1229,14 @@ static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) "sbp2 query logins orb", scsi_id->query_logins_orb_dma); memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); - memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); data[0] = ORB_SET_NODE_ID(hi->host->node_id); data[1] = scsi_id->query_logins_orb_dma; sbp2util_cpu_to_be32_buffer(data, 8); - atomic_set(&scsi_id->sbp2_login_complete, 0); - hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); - if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) { + if (sbp2util_access_timeout(scsi_id, 2*HZ)) { SBP2_INFO("Error querying logins to SBP-2 device - timed out"); return -EIO; } @@ -1202,11 +1246,8 @@ static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) return -EIO; } - if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || - STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || - STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { - - SBP2_INFO("Error querying logins to SBP-2 device - timed out"); + if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { + SBP2_INFO("Error querying logins to SBP-2 device - failed"); return -EIO; } @@ -1278,21 +1319,18 @@ static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) "sbp2 login orb", scsi_id->login_orb_dma); memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); - memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); data[0] = ORB_SET_NODE_ID(hi->host->node_id); data[1] = scsi_id->login_orb_dma; sbp2util_cpu_to_be32_buffer(data, 8); - atomic_set(&scsi_id->sbp2_login_complete, 0); - hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); /* * Wait for login status (up to 20 seconds)... */ - if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) { - SBP2_ERR("Error logging into SBP-2 device - login timed-out"); + if (sbp2util_access_timeout(scsi_id, 20*HZ)) { + SBP2_ERR("Error logging into SBP-2 device - timed out"); return -EIO; } @@ -1300,18 +1338,12 @@ static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) * Sanity. Make sure status returned matches login orb. */ if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { - SBP2_ERR("Error logging into SBP-2 device - login timed-out"); + SBP2_ERR("Error logging into SBP-2 device - timed out"); return -EIO; } - /* - * Check status - */ - if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || - STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || - STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { - - SBP2_ERR("Error logging into SBP-2 device - login failed"); + if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { + SBP2_ERR("Error logging into SBP-2 device - failed"); return -EIO; } @@ -1335,9 +1367,7 @@ static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; SBP2_INFO("Logged into SBP-2 device"); - return 0; - } /* @@ -1387,21 +1417,17 @@ static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) data[1] = scsi_id->logout_orb_dma; sbp2util_cpu_to_be32_buffer(data, 8); - atomic_set(&scsi_id->sbp2_login_complete, 0); - error = hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); if (error) return error; /* Wait for device to logout...1 second. */ - if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) + if (sbp2util_access_timeout(scsi_id, HZ)) return -EIO; SBP2_INFO("Logged out of SBP-2 device"); - return 0; - } /* @@ -1445,20 +1471,10 @@ static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); - /* - * Initialize status fifo - */ - memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); - - /* - * Ok, let's write to the target's management agent register - */ data[0] = ORB_SET_NODE_ID(hi->host->node_id); data[1] = scsi_id->reconnect_orb_dma; sbp2util_cpu_to_be32_buffer(data, 8); - atomic_set(&scsi_id->sbp2_login_complete, 0); - error = hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); if (error) @@ -1467,8 +1483,8 @@ static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) /* * Wait for reconnect status (up to 1 second)... */ - if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) { - SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); + if (sbp2util_access_timeout(scsi_id, HZ)) { + SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); return -EIO; } @@ -1476,25 +1492,17 @@ static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) * Sanity. Make sure status returned matches reconnect orb. */ if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { - SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); + SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); return -EIO; } - /* - * Check status - */ - if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || - STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || - STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { - - SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed"); + if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { + SBP2_ERR("Error reconnecting to SBP-2 device - failed"); return -EIO; } HPSB_DEBUG("Reconnected to SBP-2 device"); - return 0; - } /* @@ -1592,11 +1600,6 @@ static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, } workarounds = sbp2_default_workarounds; - if (force_inquiry_hack) { - SBP2_WARN("force_inquiry_hack is deprecated. " - "Use parameter 'workarounds' instead."); - workarounds |= SBP2_WORKAROUND_INQUIRY_36; - } if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { @@ -1705,9 +1708,14 @@ static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) quadlet_t data; u64 addr; int retval; + unsigned long flags; SBP2_DEBUG_ENTER(); + cancel_delayed_work(&scsi_id->protocol_work); + if (wait) + flush_scheduled_work(); + data = ntohl(SBP2_AGENT_RESET_DATA); addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; @@ -1724,7 +1732,9 @@ static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) /* * Need to make sure orb pointer is written on next command */ + spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); scsi_id->last_orb = NULL; + spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); return 0; } @@ -1961,13 +1971,17 @@ static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, /* * This function is called in order to begin a regular SBP-2 command. */ -static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, +static void sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, struct sbp2_command_info *command) { struct sbp2scsi_host_info *hi = scsi_id->hi; struct sbp2_command_orb *command_orb = &command->command_orb; - struct node_entry *ne = scsi_id->ne; - u64 addr; + struct sbp2_command_orb *last_orb; + dma_addr_t last_orb_dma; + u64 addr = scsi_id->sbp2_command_block_agent_addr; + quadlet_t data[2]; + size_t length; + unsigned long flags; outstanding_orb_incr; SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", @@ -1975,73 +1989,70 @@ static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); + PCI_DMA_TODEVICE); pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, sizeof(command->scatter_gather_element), PCI_DMA_BIDIRECTIONAL); /* * Check to see if there are any previous orbs to use */ - if (scsi_id->last_orb == NULL) { - quadlet_t data[2]; - + spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); + last_orb = scsi_id->last_orb; + last_orb_dma = scsi_id->last_orb_dma; + if (!last_orb) { /* - * Ok, let's write to the target's management agent register + * last_orb == NULL means: We know that the target's fetch agent + * is not active right now. */ - addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET; + addr += SBP2_ORB_POINTER_OFFSET; data[0] = ORB_SET_NODE_ID(hi->host->node_id); data[1] = command->command_orb_dma; sbp2util_cpu_to_be32_buffer(data, 8); - - SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb); - - if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) { - SBP2_ERR("sbp2util_node_write_no_wait failed.\n"); - return -EIO; - } - - SBP2_ORB_DEBUG("write command agent complete"); - - scsi_id->last_orb = command_orb; - scsi_id->last_orb_dma = command->command_orb_dma; - + length = 8; } else { - quadlet_t data; - /* - * We have an orb already sent (maybe or maybe not - * processed) that we can append this orb to. So do so, - * and ring the doorbell. Have to be very careful - * modifying these next orb pointers, as they are accessed - * both by the sbp2 device and us. + * last_orb != NULL means: We know that the target's fetch agent + * is (very probably) not dead or in reset state right now. + * We have an ORB already sent that we can append a new one to. + * The target's fetch agent may or may not have read this + * previous ORB yet. */ - scsi_id->last_orb->next_ORB_lo = - cpu_to_be32(command->command_orb_dma); + pci_dma_sync_single_for_cpu(hi->host->pdev, last_orb_dma, + sizeof(struct sbp2_command_orb), + PCI_DMA_TODEVICE); + last_orb->next_ORB_lo = cpu_to_be32(command->command_orb_dma); + wmb(); /* Tells hardware that this pointer is valid */ - scsi_id->last_orb->next_ORB_hi = 0x0; - pci_dma_sync_single_for_device(hi->host->pdev, - scsi_id->last_orb_dma, + last_orb->next_ORB_hi = 0; + pci_dma_sync_single_for_device(hi->host->pdev, last_orb_dma, sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); + PCI_DMA_TODEVICE); + addr += SBP2_DOORBELL_OFFSET; + data[0] = 0; + length = 4; + } + scsi_id->last_orb = command_orb; + scsi_id->last_orb_dma = command->command_orb_dma; + spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); + SBP2_ORB_DEBUG("write to %s register, command orb %p", + last_orb ? "DOORBELL" : "ORB_POINTER", command_orb); + if (sbp2util_node_write_no_wait(scsi_id->ne, addr, data, length)) { /* - * Ring the doorbell + * sbp2util_node_write_no_wait failed. We certainly ran out + * of transaction labels, perhaps just because there were no + * context switches which gave khpsbpkt a chance to collect + * free tlabels. Try again in non-atomic context. If necessary, + * the workqueue job will sleep to guaranteedly get a tlabel. + * We do not accept new commands until the job is over. */ - data = cpu_to_be32(command->command_orb_dma); - addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET; - - SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb); - - if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) { - SBP2_ERR("sbp2util_node_write_no_wait failed"); - return -EIO; - } - - scsi_id->last_orb = command_orb; - scsi_id->last_orb_dma = command->command_orb_dma; - + scsi_block_requests(scsi_id->scsi_host); + PREPARE_WORK(&scsi_id->protocol_work, + last_orb ? sbp2util_write_doorbell: + sbp2util_write_orb_pointer, + scsi_id); + schedule_work(&scsi_id->protocol_work); } - return 0; } /* @@ -2078,11 +2089,6 @@ static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, "sbp2 command orb", command->command_orb_dma); /* - * Initialize status fifo - */ - memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); - - /* * Link up the orb, and ring the doorbell if needed */ sbp2_link_orb_command(scsi_id, command); @@ -2123,12 +2129,14 @@ static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense /* * This function deals with status writes from the SBP-2 device */ -static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid, - quadlet_t *data, u64 addr, size_t length, u16 fl) +static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, + int destid, quadlet_t *data, u64 addr, + size_t length, u16 fl) { struct sbp2scsi_host_info *hi; struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; struct scsi_cmnd *SCpnt = NULL; + struct sbp2_status_block *sb; u32 scsi_status = SBP2_SCSI_STATUS_GOOD; struct sbp2_command_info *command; unsigned long flags; @@ -2137,18 +2145,19 @@ static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int dest sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); - if (!host) { + if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { + SBP2_ERR("Wrong size of status block"); + return RCODE_ADDRESS_ERROR; + } + if (unlikely(!host)) { SBP2_ERR("host is NULL - this is bad!"); return RCODE_ADDRESS_ERROR; } - hi = hpsb_get_hostinfo(&sbp2_highlevel, host); - - if (!hi) { + if (unlikely(!hi)) { SBP2_ERR("host info is NULL - this is bad!"); return RCODE_ADDRESS_ERROR; } - /* * Find our scsi_id structure by looking at the status fifo address * written to by the sbp2 device. @@ -2160,32 +2169,35 @@ static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int dest break; } } - - if (!scsi_id) { + if (unlikely(!scsi_id)) { SBP2_ERR("scsi_id is NULL - device is gone?"); return RCODE_ADDRESS_ERROR; } /* - * Put response into scsi_id status fifo... + * Put response into scsi_id status fifo buffer. The first two bytes + * come in big endian bit order. Often the target writes only a + * truncated status block, minimally the first two quadlets. The rest + * is implied to be zeros. */ - memcpy(&scsi_id->status_block, data, length); + sb = &scsi_id->status_block; + memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); + memcpy(sb, data, length); + sbp2util_be32_to_cpu_buffer(sb, 8); /* - * Byte swap first two quadlets (8 bytes) of status for processing + * Ignore unsolicited status. Handle command ORB status. */ - sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8); - - /* - * Handle command ORB status here if necessary. First, need to match status with command. - */ - command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo); + if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) + command = NULL; + else + command = sbp2util_find_command_for_orb(scsi_id, + sb->ORB_offset_lo); if (command) { - SBP2_DEBUG("Found status for command ORB"); pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); + PCI_DMA_TODEVICE); pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, sizeof(command->scatter_gather_element), PCI_DMA_BIDIRECTIONAL); @@ -2194,7 +2206,12 @@ static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int dest outstanding_orb_decr; /* - * Matched status with command, now grab scsi command pointers and check status + * Matched status with command, now grab scsi command pointers + * and check status. + */ + /* + * FIXME: If the src field in the status is 1, the ORB DMA must + * not be reused until status for a subsequent ORB is received. */ SCpnt = command->Current_SCpnt; spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); @@ -2202,61 +2219,64 @@ static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int dest spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); if (SCpnt) { - + u32 h = sb->ORB_offset_hi_misc; + u32 r = STATUS_GET_RESP(h); + + if (r != RESP_STATUS_REQUEST_COMPLETE) { + SBP2_WARN("resp 0x%x, sbp_status 0x%x", + r, STATUS_GET_SBP_STATUS(h)); + scsi_status = + r == RESP_STATUS_TRANSPORT_FAILURE ? + SBP2_SCSI_STATUS_BUSY : + SBP2_SCSI_STATUS_COMMAND_TERMINATED; + } /* - * See if the target stored any scsi status information + * See if the target stored any scsi status information. */ - if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) { - /* - * Translate SBP-2 status to SCSI sense data - */ + if (STATUS_GET_LEN(h) > 1) { SBP2_DEBUG("CHECK CONDITION"); - scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer); + scsi_status = sbp2_status_to_sense_data( + (unchar *)sb, SCpnt->sense_buffer); } - /* - * Check to see if the dead bit is set. If so, we'll have to initiate - * a fetch agent reset. + * Check to see if the dead bit is set. If so, we'll + * have to initiate a fetch agent reset. */ - if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) { - - /* - * Initiate a fetch agent reset. - */ - SBP2_DEBUG("Dead bit set - initiating fetch agent reset"); + if (STATUS_TEST_DEAD(h)) { + SBP2_DEBUG("Dead bit set - " + "initiating fetch agent reset"); sbp2_agent_reset(scsi_id, 0); } - SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); } /* - * Check here to see if there are no commands in-use. If there are none, we can - * null out last orb so that next time around we write directly to the orb pointer... - * Quick start saves one 1394 bus transaction. + * Check here to see if there are no commands in-use. If there + * are none, we know that the fetch agent left the active state + * _and_ that we did not reactivate it yet. Therefore clear + * last_orb so that next time we write directly to the + * ORB_POINTER register. That way the fetch agent does not need + * to refetch the next_ORB. */ spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); - if (list_empty(&scsi_id->sbp2_command_orb_inuse)) { + if (list_empty(&scsi_id->sbp2_command_orb_inuse)) scsi_id->last_orb = NULL; - } spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); } else { - /* * It's probably a login/logout/reconnect status. */ - if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) || - (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) || - (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) || - (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) { - atomic_set(&scsi_id->sbp2_login_complete, 1); + if ((sb->ORB_offset_lo == scsi_id->reconnect_orb_dma) || + (sb->ORB_offset_lo == scsi_id->login_orb_dma) || + (sb->ORB_offset_lo == scsi_id->query_logins_orb_dma) || + (sb->ORB_offset_lo == scsi_id->logout_orb_dma)) { + scsi_id->access_complete = 1; + wake_up_interruptible(&access_wq); } } if (SCpnt) { - - /* Complete the SCSI command. */ SBP2_DEBUG("Completing SCSI command"); sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, command->Current_done); @@ -2372,7 +2392,7 @@ static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id command = list_entry(lh, struct sbp2_command_info, list); pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); + PCI_DMA_TODEVICE); pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, sizeof(command->scatter_gather_element), PCI_DMA_BIDIRECTIONAL); @@ -2495,6 +2515,7 @@ static int sbp2scsi_slave_alloc(struct scsi_device *sdev) (struct scsi_id_instance_data *)sdev->host->hostdata[0]; scsi_id->sdev = sdev; + sdev->allow_restart = 1; if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36) sdev->inquiry_len = 36; @@ -2508,16 +2529,12 @@ static int sbp2scsi_slave_configure(struct scsi_device *sdev) blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); sdev->use_10_for_rw = 1; - sdev->use_10_for_ms = 1; if (sdev->type == TYPE_DISK && scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) sdev->skip_ms_page_8 = 1; if (scsi_id->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) sdev->fix_capacity = 1; - if (scsi_id->ne->guid_vendor_id == 0x0010b9 && /* Maxtor's OUI */ - (sdev->type == TYPE_DISK || sdev->type == TYPE_RBC)) - sdev->allow_restart = 1; return 0; } @@ -2555,7 +2572,7 @@ static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); + PCI_DMA_TODEVICE); pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, sizeof(command->scatter_gather_element), @@ -2571,7 +2588,7 @@ static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) /* * Initiate a fetch agent reset. */ - sbp2_agent_reset(scsi_id, 0); + sbp2_agent_reset(scsi_id, 1); sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); } @@ -2590,7 +2607,7 @@ static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) if (sbp2util_node_is_available(scsi_id)) { SBP2_ERR("Generating sbp2 fetch agent reset"); - sbp2_agent_reset(scsi_id, 0); + sbp2_agent_reset(scsi_id, 1); } return SUCCESS; diff --git a/drivers/ieee1394/sbp2.h b/drivers/ieee1394/sbp2.h index b22ce1aa8fe..abbe48e646c 100644 --- a/drivers/ieee1394/sbp2.h +++ b/drivers/ieee1394/sbp2.h @@ -46,8 +46,8 @@ #define ORB_SET_DIRECTION(value) ((value & 0x1) << 27) struct sbp2_command_orb { - volatile u32 next_ORB_hi; - volatile u32 next_ORB_lo; + u32 next_ORB_hi; + u32 next_ORB_lo; u32 data_descriptor_hi; u32 data_descriptor_lo; u32 misc; @@ -180,12 +180,14 @@ struct sbp2_unrestricted_page_table { #define SBP2_SCSI_STATUS_SELECTION_TIMEOUT 0xff -#define STATUS_GET_ORB_OFFSET_HI(value) (value & 0xffff) -#define STATUS_GET_SBP_STATUS(value) ((value >> 16) & 0xff) -#define STATUS_GET_LENGTH(value) ((value >> 24) & 0x7) -#define STATUS_GET_DEAD_BIT(value) ((value >> 27) & 0x1) -#define STATUS_GET_RESP(value) ((value >> 28) & 0x3) -#define STATUS_GET_SRC(value) ((value >> 30) & 0x3) +#define STATUS_GET_SRC(value) (((value) >> 30) & 0x3) +#define STATUS_GET_RESP(value) (((value) >> 28) & 0x3) +#define STATUS_GET_LEN(value) (((value) >> 24) & 0x7) +#define STATUS_GET_SBP_STATUS(value) (((value) >> 16) & 0xff) +#define STATUS_GET_ORB_OFFSET_HI(value) ((value) & 0x0000ffff) +#define STATUS_TEST_DEAD(value) ((value) & 0x08000000) +/* test 'resp' | 'dead' | 'sbp2_status' */ +#define STATUS_TEST_RDS(value) ((value) & 0x38ff0000) struct sbp2_status_block { u32 ORB_offset_hi_misc; @@ -318,9 +320,9 @@ struct scsi_id_instance_data { u64 status_fifo_addr; /* - * Variable used for logins, reconnects, logouts, query logins + * Waitqueue flag for logins, reconnects, logouts, query logins */ - atomic_t sbp2_login_complete; + int access_complete:1; /* * Pool of command orbs, so we can have more than overlapped command per id @@ -344,6 +346,16 @@ struct scsi_id_instance_data { /* Device specific workarounds/brokeness */ unsigned workarounds; + + atomic_t state; + struct work_struct protocol_work; +}; + +/* For use in scsi_id_instance_data.state */ +enum sbp2lu_state_types { + SBP2LU_STATE_RUNNING, /* all normal */ + SBP2LU_STATE_IN_RESET, /* between bus reset and reconnect */ + SBP2LU_STATE_IN_SHUTDOWN /* when sbp2_remove was called */ }; /* Sbp2 host data structure (one per IEEE1394 host) */ @@ -390,11 +402,6 @@ static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id); static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid, quadlet_t *data, u64 addr, size_t length, u16 flags); static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait); -static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, - struct sbp2_command_info *command); -static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, - struct scsi_cmnd *SCpnt, - void (*done)(struct scsi_cmnd *)); static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data); static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, diff --git a/drivers/ieee1394/video1394.c b/drivers/ieee1394/video1394.c index c6e3f02bc6d..9bc65059cc6 100644 --- a/drivers/ieee1394/video1394.c +++ b/drivers/ieee1394/video1394.c @@ -49,16 +49,16 @@ #include <linux/compat.h> #include <linux/cdev.h> -#include "ieee1394.h" -#include "ieee1394_types.h" +#include "dma.h" +#include "highlevel.h" #include "hosts.h" +#include "ieee1394.h" #include "ieee1394_core.h" -#include "highlevel.h" -#include "video1394.h" +#include "ieee1394_hotplug.h" +#include "ieee1394_types.h" #include "nodemgr.h" -#include "dma.h" - #include "ohci1394.h" +#include "video1394.h" #define ISO_CHANNELS 64 @@ -129,7 +129,7 @@ struct file_ctx { #define DBGMSG(card, fmt, args...) \ printk(KERN_INFO "video1394_%d: " fmt "\n" , card , ## args) #else -#define DBGMSG(card, fmt, args...) +#define DBGMSG(card, fmt, args...) do {} while (0) #endif /* print general (card independent) information */ @@ -1181,7 +1181,8 @@ static int video1394_mmap(struct file *file, struct vm_area_struct *vma) lock_kernel(); if (ctx->current_ctx == NULL) { - PRINT(KERN_ERR, ctx->ohci->host->id, "Current iso context not set"); + PRINT(KERN_ERR, ctx->ohci->host->id, + "Current iso context not set"); } else res = dma_region_mmap(&ctx->current_ctx->dma, file, vma); unlock_kernel(); @@ -1189,6 +1190,40 @@ static int video1394_mmap(struct file *file, struct vm_area_struct *vma) return res; } +static unsigned int video1394_poll(struct file *file, poll_table *pt) +{ + struct file_ctx *ctx; + unsigned int mask = 0; + unsigned long flags; + struct dma_iso_ctx *d; + int i; + + lock_kernel(); + ctx = file->private_data; + d = ctx->current_ctx; + if (d == NULL) { + PRINT(KERN_ERR, ctx->ohci->host->id, + "Current iso context not set"); + mask = POLLERR; + goto done; + } + + poll_wait(file, &d->waitq, pt); + + spin_lock_irqsave(&d->lock, flags); + for (i = 0; i < d->num_desc; i++) { + if (d->buffer_status[i] == VIDEO1394_BUFFER_READY) { + mask |= POLLIN | POLLRDNORM; + break; + } + } + spin_unlock_irqrestore(&d->lock, flags); +done: + unlock_kernel(); + + return mask; +} + static int video1394_open(struct inode *inode, struct file *file) { int i = ieee1394_file_to_instance(file); @@ -1257,6 +1292,7 @@ static struct file_operations video1394_fops= #ifdef CONFIG_COMPAT .compat_ioctl = video1394_compat_ioctl, #endif + .poll = video1394_poll, .mmap = video1394_mmap, .open = video1394_open, .release = video1394_release |