Loading drivers/scsi/libata-core.c +276 −7 Original line number Diff line number Diff line Loading @@ -186,6 +186,28 @@ static void ata_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf) ata_wait_idle(ap); } /** * ata_tf_load - send taskfile registers to host controller * @ap: Port to which output is sent * @tf: ATA taskfile register set * * Outputs ATA taskfile to standard ATA host controller using MMIO * or PIO as indicated by the ATA_FLAG_MMIO flag. * Writes the control, feature, nsect, lbal, lbam, and lbah registers. * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, * hob_lbal, hob_lbam, and hob_lbah. * * This function waits for idle (!BUSY and !DRQ) after writing * registers. If the control register has a new value, this * function also waits for idle after writing control and before * writing the remaining registers. * * May be used as the tf_load() entry in ata_port_operations. * * LOCKING: * Inherited from caller. */ void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf) { if (ap->flags & ATA_FLAG_MMIO) Loading @@ -195,11 +217,11 @@ void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf) } /** * ata_exec_command - issue ATA command to host controller * ata_exec_command_pio - issue ATA command to host controller * @ap: port to which command is being issued * @tf: ATA taskfile register set * * Issues PIO/MMIO write to ATA command register, with proper * Issues PIO write to ATA command register, with proper * synchronization with interrupt handler / other threads. * * LOCKING: Loading Loading @@ -235,6 +257,18 @@ static void ata_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf) ata_pause(ap); } /** * ata_exec_command - issue ATA command to host controller * @ap: port to which command is being issued * @tf: ATA taskfile register set * * Issues PIO/MMIO write to ATA command register, with proper * synchronization with interrupt handler / other threads. * * LOCKING: * spin_lock_irqsave(host_set lock) */ void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf) { if (ap->flags & ATA_FLAG_MMIO) Loading Loading @@ -305,7 +339,7 @@ void ata_tf_to_host_nolock(struct ata_port *ap, struct ata_taskfile *tf) } /** * ata_tf_read - input device's ATA taskfile shadow registers * ata_tf_read_pio - input device's ATA taskfile shadow registers * @ap: Port from which input is read * @tf: ATA taskfile register set for storing input * Loading Loading @@ -368,6 +402,23 @@ static void ata_tf_read_mmio(struct ata_port *ap, struct ata_taskfile *tf) } } /** * ata_tf_read - input device's ATA taskfile shadow registers * @ap: Port from which input is read * @tf: ATA taskfile register set for storing input * * Reads ATA taskfile registers for currently-selected device * into @tf. * * Reads nsect, lbal, lbam, lbah, and device. If ATA_TFLAG_LBA48 * is set, also reads the hob registers. * * May be used as the tf_read() entry in ata_port_operations. * * LOCKING: * Inherited from caller. */ void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) { if (ap->flags & ATA_FLAG_MMIO) Loading @@ -381,7 +432,7 @@ void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) * @ap: port where the device is * * Reads ATA taskfile status register for currently-selected device * and return it's value. This also clears pending interrupts * and return its value. This also clears pending interrupts * from this device * * LOCKING: Loading @@ -397,7 +448,7 @@ static u8 ata_check_status_pio(struct ata_port *ap) * @ap: port where the device is * * Reads ATA taskfile status register for currently-selected device * via MMIO and return it's value. This also clears pending interrupts * via MMIO and return its value. This also clears pending interrupts * from this device * * LOCKING: Loading @@ -408,6 +459,20 @@ static u8 ata_check_status_mmio(struct ata_port *ap) return readb((void __iomem *) ap->ioaddr.status_addr); } /** * ata_check_status - Read device status reg & clear interrupt * @ap: port where the device is * * Reads ATA taskfile status register for currently-selected device * and return its value. This also clears pending interrupts * from this device * * May be used as the check_status() entry in ata_port_operations. * * LOCKING: * Inherited from caller. */ u8 ata_check_status(struct ata_port *ap) { if (ap->flags & ATA_FLAG_MMIO) Loading @@ -415,6 +480,20 @@ u8 ata_check_status(struct ata_port *ap) return ata_check_status_pio(ap); } /** * ata_altstatus - Read device alternate status reg * @ap: port where the device is * * Reads ATA taskfile alternate status register for * currently-selected device and return its value. * * Note: may NOT be used as the check_altstatus() entry in * ata_port_operations. * * LOCKING: * Inherited from caller. */ u8 ata_altstatus(struct ata_port *ap) { if (ap->ops->check_altstatus) Loading @@ -425,6 +504,20 @@ u8 ata_altstatus(struct ata_port *ap) return inb(ap->ioaddr.altstatus_addr); } /** * ata_chk_err - Read device error reg * @ap: port where the device is * * Reads ATA taskfile error register for * currently-selected device and return its value. * * Note: may NOT be used as the check_err() entry in * ata_port_operations. * * LOCKING: * Inherited from caller. */ u8 ata_chk_err(struct ata_port *ap) { if (ap->ops->check_err) Loading Loading @@ -873,10 +966,24 @@ void ata_dev_id_string(u16 *id, unsigned char *s, } } /** * ata_noop_dev_select - Select device 0/1 on ATA bus * @ap: ATA channel to manipulate * @device: ATA device (numbered from zero) to select * * This function performs no actual function. * * May be used as the dev_select() entry in ata_port_operations. * * LOCKING: * caller. */ void ata_noop_dev_select (struct ata_port *ap, unsigned int device) { } /** * ata_std_dev_select - Select device 0/1 on ATA bus * @ap: ATA channel to manipulate Loading @@ -884,7 +991,9 @@ void ata_noop_dev_select (struct ata_port *ap, unsigned int device) * * Use the method defined in the ATA specification to * make either device 0, or device 1, active on the * ATA channel. * ATA channel. Works with both PIO and MMIO. * * May be used as the dev_select() entry in ata_port_operations. * * LOCKING: * caller. Loading Loading @@ -2127,6 +2236,19 @@ void ata_qc_prep(struct ata_queued_cmd *qc) * spin_lock_irqsave(host_set lock) */ /** * ata_sg_init_one - Prepare a one-entry scatter-gather list. * @qc: Queued command * @buf: transfer buffer * @buflen: length of buf * * Builds a single-entry scatter-gather list to initiate a * transfer utilizing the specified buffer. * * LOCKING: */ void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) { struct scatterlist *sg; Loading Loading @@ -2158,6 +2280,18 @@ void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) * spin_lock_irqsave(host_set lock) */ /** * ata_sg_init - Assign a scatter gather list to a queued command * @qc: Queued command * @sg: Scatter-gather list * @n_elem: length of sg list * * Attaches a scatter-gather list to a queued command. * * LOCKING: */ void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, unsigned int n_elem) { Loading Loading @@ -2331,6 +2465,18 @@ static void ata_pio_complete (struct ata_port *ap) ata_qc_complete(qc, drv_stat); } /** * swap_buf_le16 - * @buf: Buffer to swap * @buf_words: Number of 16-bit words in buffer. * * Swap halves of 16-bit words if needed to convert from * little-endian byte order to native cpu byte order, or * vice-versa. * * LOCKING: */ void swap_buf_le16(u16 *buf, unsigned int buf_words) { #ifdef __BIG_ENDIAN Loading Loading @@ -2992,6 +3138,7 @@ err_out: return -1; } /** * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner * @qc: command to issue to device Loading @@ -3001,6 +3148,8 @@ err_out: * classes called "protocols", and issuing each type of protocol * is slightly different. * * May be used as the qc_issue() entry in ata_port_operations. * * LOCKING: * spin_lock_irqsave(host_set lock) * Loading Loading @@ -3058,7 +3207,7 @@ int ata_qc_issue_prot(struct ata_queued_cmd *qc) } /** * ata_bmdma_setup - Set up PCI IDE BMDMA transaction * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction * @qc: Info associated with this ATA transaction. * * LOCKING: Loading Loading @@ -3165,6 +3314,18 @@ static void ata_bmdma_start_pio (struct ata_queued_cmd *qc) ap->ioaddr.bmdma_addr + ATA_DMA_CMD); } /** * ata_bmdma_start - Start a PCI IDE BMDMA transaction * @qc: Info associated with this ATA transaction. * * Writes the ATA_DMA_START flag to the DMA command register. * * May be used as the bmdma_start() entry in ata_port_operations. * * LOCKING: * spin_lock_irqsave(host_set lock) */ void ata_bmdma_start(struct ata_queued_cmd *qc) { if (qc->ap->flags & ATA_FLAG_MMIO) Loading @@ -3173,6 +3334,20 @@ void ata_bmdma_start(struct ata_queued_cmd *qc) ata_bmdma_start_pio(qc); } /** * ata_bmdma_setup - Set up PCI IDE BMDMA transaction * @qc: Info associated with this ATA transaction. * * Writes address of PRD table to device's PRD Table Address * register, sets the DMA control register, and calls * ops->exec_command() to start the transfer. * * May be used as the bmdma_setup() entry in ata_port_operations. * * LOCKING: * spin_lock_irqsave(host_set lock) */ void ata_bmdma_setup(struct ata_queued_cmd *qc) { if (qc->ap->flags & ATA_FLAG_MMIO) Loading @@ -3181,6 +3356,19 @@ void ata_bmdma_setup(struct ata_queued_cmd *qc) ata_bmdma_setup_pio(qc); } /** * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt. * @qc: Info associated with this ATA transaction. * * Clear interrupt and error flags in DMA status register. * * May be used as the irq_clear() entry in ata_port_operations. * * LOCKING: * spin_lock_irqsave(host_set lock) */ void ata_bmdma_irq_clear(struct ata_port *ap) { if (ap->flags & ATA_FLAG_MMIO) { Loading @@ -3193,6 +3381,19 @@ void ata_bmdma_irq_clear(struct ata_port *ap) } /** * ata_bmdma_status - Read PCI IDE BMDMA status * @qc: Info associated with this ATA transaction. * * Read and return BMDMA status register. * * May be used as the bmdma_status() entry in ata_port_operations. * * LOCKING: * spin_lock_irqsave(host_set lock) */ u8 ata_bmdma_status(struct ata_port *ap) { u8 host_stat; Loading @@ -3204,6 +3405,19 @@ u8 ata_bmdma_status(struct ata_port *ap) return host_stat; } /** * ata_bmdma_stop - Stop PCI IDE BMDMA transfer * @qc: Info associated with this ATA transaction. * * Clears the ATA_DMA_START flag in the dma control register * * May be used as the bmdma_stop() entry in ata_port_operations. * * LOCKING: * spin_lock_irqsave(host_set lock) */ void ata_bmdma_stop(struct ata_port *ap) { if (ap->flags & ATA_FLAG_MMIO) { Loading Loading @@ -3407,6 +3621,19 @@ err_out: ata_qc_complete(qc, ATA_ERR); } /** * ata_port_start - Set port up for dma. * @ap: Port to initialize * * Called just after data structures for each port are * initialized. Allocates space for PRD table. * * May be used as the port_start() entry in ata_port_operations. * * LOCKING: */ int ata_port_start (struct ata_port *ap) { struct device *dev = ap->host_set->dev; Loading @@ -3420,6 +3647,18 @@ int ata_port_start (struct ata_port *ap) return 0; } /** * ata_port_stop - Undo ata_port_start() * @ap: Port to shut down * * Frees the PRD table. * * May be used as the port_stop() entry in ata_port_operations. * * LOCKING: */ void ata_port_stop (struct ata_port *ap) { struct device *dev = ap->host_set->dev; Loading Loading @@ -3720,7 +3959,15 @@ int ata_scsi_release(struct Scsi_Host *host) /** * ata_std_ports - initialize ioaddr with standard port offsets. * @ioaddr: IO address structure to be initialized * * Utility function which initializes data_addr, error_addr, * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, * device_addr, status_addr, and command_addr to standard offsets * relative to cmd_addr. * * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. */ void ata_std_ports(struct ata_ioports *ioaddr) { ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; Loading Loading @@ -3762,6 +4009,20 @@ ata_probe_ent_alloc(struct device *dev, struct ata_port_info *port) return probe_ent; } /** * ata_pci_init_native_mode - Initialize native-mode driver * @pdev: pci device to be initialized * @port: array[2] of pointers to port info structures. * * Utility function which allocates and initializes an * ata_probe_ent structure for a standard dual-port * PIO-based IDE controller. The returned ata_probe_ent * structure can be passed to ata_device_add(). The returned * ata_probe_ent structure should then be freed with kfree(). */ #ifdef CONFIG_PCI struct ata_probe_ent * ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port) Loading Loading @@ -3843,6 +4104,14 @@ ata_pci_init_legacy_mode(struct pci_dev *pdev, struct ata_port_info **port, * @port_info: Information from low-level host driver * @n_ports: Number of ports attached to host controller * * This is a helper function which can be called from a driver's * xxx_init_one() probe function if the hardware uses traditional * IDE taskfile registers. * * This function calls pci_enable_device(), reserves its register * regions, sets the dma mask, enables bus master mode, and calls * ata_device_add() * * LOCKING: * Inherited from PCI layer (may sleep). * Loading include/linux/libata.h +58 −0 Original line number Diff line number Diff line Loading @@ -466,12 +466,34 @@ static inline u8 ata_chk_status(struct ata_port *ap) return ap->ops->check_status(ap); } /** * ata_pause - Flush writes and pause 400 nanoseconds. * @ap: Port to wait for. * * LOCKING: * Inherited from caller. */ static inline void ata_pause(struct ata_port *ap) { ata_altstatus(ap); ndelay(400); } /** * ata_busy_wait - Wait for a port status register * @ap: Port to wait for. * * Waits up to max*10 microseconds for the selected bits in the port's * status register to be cleared. * Returns final value of status register. * * LOCKING: * Inherited from caller. */ static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, unsigned int max) { Loading @@ -486,6 +508,18 @@ static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, return status; } /** * ata_wait_idle - Wait for a port to be idle. * @ap: Port to wait for. * * Waits up to 10ms for port's BUSY and DRQ signals to clear. * Returns final value of status register. * * LOCKING: * Inherited from caller. */ static inline u8 ata_wait_idle(struct ata_port *ap) { u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); Loading Loading @@ -524,6 +558,18 @@ static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, uns tf->device = ATA_DEVICE_OBS | ATA_DEV1; } /** * ata_irq_on - Enable interrupts on a port. * @ap: Port on which interrupts are enabled. * * Enable interrupts on a legacy IDE device using MMIO or PIO, * wait for idle, clear any pending interrupts. * * LOCKING: * Inherited from caller. */ static inline u8 ata_irq_on(struct ata_port *ap) { struct ata_ioports *ioaddr = &ap->ioaddr; Loading @@ -543,6 +589,18 @@ static inline u8 ata_irq_on(struct ata_port *ap) return tmp; } /** * ata_irq_ack - Acknowledge a device interrupt. * @ap: Port on which interrupts are enabled. * * Wait up to 10 ms for legacy IDE device to become idle (BUSY * or BUSY+DRQ clear). Obtain dma status and port status from * device. Clear the interrupt. Return port status. * * LOCKING: */ static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) { unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; Loading Loading
drivers/scsi/libata-core.c +276 −7 Original line number Diff line number Diff line Loading @@ -186,6 +186,28 @@ static void ata_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf) ata_wait_idle(ap); } /** * ata_tf_load - send taskfile registers to host controller * @ap: Port to which output is sent * @tf: ATA taskfile register set * * Outputs ATA taskfile to standard ATA host controller using MMIO * or PIO as indicated by the ATA_FLAG_MMIO flag. * Writes the control, feature, nsect, lbal, lbam, and lbah registers. * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, * hob_lbal, hob_lbam, and hob_lbah. * * This function waits for idle (!BUSY and !DRQ) after writing * registers. If the control register has a new value, this * function also waits for idle after writing control and before * writing the remaining registers. * * May be used as the tf_load() entry in ata_port_operations. * * LOCKING: * Inherited from caller. */ void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf) { if (ap->flags & ATA_FLAG_MMIO) Loading @@ -195,11 +217,11 @@ void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf) } /** * ata_exec_command - issue ATA command to host controller * ata_exec_command_pio - issue ATA command to host controller * @ap: port to which command is being issued * @tf: ATA taskfile register set * * Issues PIO/MMIO write to ATA command register, with proper * Issues PIO write to ATA command register, with proper * synchronization with interrupt handler / other threads. * * LOCKING: Loading Loading @@ -235,6 +257,18 @@ static void ata_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf) ata_pause(ap); } /** * ata_exec_command - issue ATA command to host controller * @ap: port to which command is being issued * @tf: ATA taskfile register set * * Issues PIO/MMIO write to ATA command register, with proper * synchronization with interrupt handler / other threads. * * LOCKING: * spin_lock_irqsave(host_set lock) */ void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf) { if (ap->flags & ATA_FLAG_MMIO) Loading Loading @@ -305,7 +339,7 @@ void ata_tf_to_host_nolock(struct ata_port *ap, struct ata_taskfile *tf) } /** * ata_tf_read - input device's ATA taskfile shadow registers * ata_tf_read_pio - input device's ATA taskfile shadow registers * @ap: Port from which input is read * @tf: ATA taskfile register set for storing input * Loading Loading @@ -368,6 +402,23 @@ static void ata_tf_read_mmio(struct ata_port *ap, struct ata_taskfile *tf) } } /** * ata_tf_read - input device's ATA taskfile shadow registers * @ap: Port from which input is read * @tf: ATA taskfile register set for storing input * * Reads ATA taskfile registers for currently-selected device * into @tf. * * Reads nsect, lbal, lbam, lbah, and device. If ATA_TFLAG_LBA48 * is set, also reads the hob registers. * * May be used as the tf_read() entry in ata_port_operations. * * LOCKING: * Inherited from caller. */ void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) { if (ap->flags & ATA_FLAG_MMIO) Loading @@ -381,7 +432,7 @@ void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) * @ap: port where the device is * * Reads ATA taskfile status register for currently-selected device * and return it's value. This also clears pending interrupts * and return its value. This also clears pending interrupts * from this device * * LOCKING: Loading @@ -397,7 +448,7 @@ static u8 ata_check_status_pio(struct ata_port *ap) * @ap: port where the device is * * Reads ATA taskfile status register for currently-selected device * via MMIO and return it's value. This also clears pending interrupts * via MMIO and return its value. This also clears pending interrupts * from this device * * LOCKING: Loading @@ -408,6 +459,20 @@ static u8 ata_check_status_mmio(struct ata_port *ap) return readb((void __iomem *) ap->ioaddr.status_addr); } /** * ata_check_status - Read device status reg & clear interrupt * @ap: port where the device is * * Reads ATA taskfile status register for currently-selected device * and return its value. This also clears pending interrupts * from this device * * May be used as the check_status() entry in ata_port_operations. * * LOCKING: * Inherited from caller. */ u8 ata_check_status(struct ata_port *ap) { if (ap->flags & ATA_FLAG_MMIO) Loading @@ -415,6 +480,20 @@ u8 ata_check_status(struct ata_port *ap) return ata_check_status_pio(ap); } /** * ata_altstatus - Read device alternate status reg * @ap: port where the device is * * Reads ATA taskfile alternate status register for * currently-selected device and return its value. * * Note: may NOT be used as the check_altstatus() entry in * ata_port_operations. * * LOCKING: * Inherited from caller. */ u8 ata_altstatus(struct ata_port *ap) { if (ap->ops->check_altstatus) Loading @@ -425,6 +504,20 @@ u8 ata_altstatus(struct ata_port *ap) return inb(ap->ioaddr.altstatus_addr); } /** * ata_chk_err - Read device error reg * @ap: port where the device is * * Reads ATA taskfile error register for * currently-selected device and return its value. * * Note: may NOT be used as the check_err() entry in * ata_port_operations. * * LOCKING: * Inherited from caller. */ u8 ata_chk_err(struct ata_port *ap) { if (ap->ops->check_err) Loading Loading @@ -873,10 +966,24 @@ void ata_dev_id_string(u16 *id, unsigned char *s, } } /** * ata_noop_dev_select - Select device 0/1 on ATA bus * @ap: ATA channel to manipulate * @device: ATA device (numbered from zero) to select * * This function performs no actual function. * * May be used as the dev_select() entry in ata_port_operations. * * LOCKING: * caller. */ void ata_noop_dev_select (struct ata_port *ap, unsigned int device) { } /** * ata_std_dev_select - Select device 0/1 on ATA bus * @ap: ATA channel to manipulate Loading @@ -884,7 +991,9 @@ void ata_noop_dev_select (struct ata_port *ap, unsigned int device) * * Use the method defined in the ATA specification to * make either device 0, or device 1, active on the * ATA channel. * ATA channel. Works with both PIO and MMIO. * * May be used as the dev_select() entry in ata_port_operations. * * LOCKING: * caller. Loading Loading @@ -2127,6 +2236,19 @@ void ata_qc_prep(struct ata_queued_cmd *qc) * spin_lock_irqsave(host_set lock) */ /** * ata_sg_init_one - Prepare a one-entry scatter-gather list. * @qc: Queued command * @buf: transfer buffer * @buflen: length of buf * * Builds a single-entry scatter-gather list to initiate a * transfer utilizing the specified buffer. * * LOCKING: */ void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) { struct scatterlist *sg; Loading Loading @@ -2158,6 +2280,18 @@ void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) * spin_lock_irqsave(host_set lock) */ /** * ata_sg_init - Assign a scatter gather list to a queued command * @qc: Queued command * @sg: Scatter-gather list * @n_elem: length of sg list * * Attaches a scatter-gather list to a queued command. * * LOCKING: */ void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, unsigned int n_elem) { Loading Loading @@ -2331,6 +2465,18 @@ static void ata_pio_complete (struct ata_port *ap) ata_qc_complete(qc, drv_stat); } /** * swap_buf_le16 - * @buf: Buffer to swap * @buf_words: Number of 16-bit words in buffer. * * Swap halves of 16-bit words if needed to convert from * little-endian byte order to native cpu byte order, or * vice-versa. * * LOCKING: */ void swap_buf_le16(u16 *buf, unsigned int buf_words) { #ifdef __BIG_ENDIAN Loading Loading @@ -2992,6 +3138,7 @@ err_out: return -1; } /** * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner * @qc: command to issue to device Loading @@ -3001,6 +3148,8 @@ err_out: * classes called "protocols", and issuing each type of protocol * is slightly different. * * May be used as the qc_issue() entry in ata_port_operations. * * LOCKING: * spin_lock_irqsave(host_set lock) * Loading Loading @@ -3058,7 +3207,7 @@ int ata_qc_issue_prot(struct ata_queued_cmd *qc) } /** * ata_bmdma_setup - Set up PCI IDE BMDMA transaction * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction * @qc: Info associated with this ATA transaction. * * LOCKING: Loading Loading @@ -3165,6 +3314,18 @@ static void ata_bmdma_start_pio (struct ata_queued_cmd *qc) ap->ioaddr.bmdma_addr + ATA_DMA_CMD); } /** * ata_bmdma_start - Start a PCI IDE BMDMA transaction * @qc: Info associated with this ATA transaction. * * Writes the ATA_DMA_START flag to the DMA command register. * * May be used as the bmdma_start() entry in ata_port_operations. * * LOCKING: * spin_lock_irqsave(host_set lock) */ void ata_bmdma_start(struct ata_queued_cmd *qc) { if (qc->ap->flags & ATA_FLAG_MMIO) Loading @@ -3173,6 +3334,20 @@ void ata_bmdma_start(struct ata_queued_cmd *qc) ata_bmdma_start_pio(qc); } /** * ata_bmdma_setup - Set up PCI IDE BMDMA transaction * @qc: Info associated with this ATA transaction. * * Writes address of PRD table to device's PRD Table Address * register, sets the DMA control register, and calls * ops->exec_command() to start the transfer. * * May be used as the bmdma_setup() entry in ata_port_operations. * * LOCKING: * spin_lock_irqsave(host_set lock) */ void ata_bmdma_setup(struct ata_queued_cmd *qc) { if (qc->ap->flags & ATA_FLAG_MMIO) Loading @@ -3181,6 +3356,19 @@ void ata_bmdma_setup(struct ata_queued_cmd *qc) ata_bmdma_setup_pio(qc); } /** * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt. * @qc: Info associated with this ATA transaction. * * Clear interrupt and error flags in DMA status register. * * May be used as the irq_clear() entry in ata_port_operations. * * LOCKING: * spin_lock_irqsave(host_set lock) */ void ata_bmdma_irq_clear(struct ata_port *ap) { if (ap->flags & ATA_FLAG_MMIO) { Loading @@ -3193,6 +3381,19 @@ void ata_bmdma_irq_clear(struct ata_port *ap) } /** * ata_bmdma_status - Read PCI IDE BMDMA status * @qc: Info associated with this ATA transaction. * * Read and return BMDMA status register. * * May be used as the bmdma_status() entry in ata_port_operations. * * LOCKING: * spin_lock_irqsave(host_set lock) */ u8 ata_bmdma_status(struct ata_port *ap) { u8 host_stat; Loading @@ -3204,6 +3405,19 @@ u8 ata_bmdma_status(struct ata_port *ap) return host_stat; } /** * ata_bmdma_stop - Stop PCI IDE BMDMA transfer * @qc: Info associated with this ATA transaction. * * Clears the ATA_DMA_START flag in the dma control register * * May be used as the bmdma_stop() entry in ata_port_operations. * * LOCKING: * spin_lock_irqsave(host_set lock) */ void ata_bmdma_stop(struct ata_port *ap) { if (ap->flags & ATA_FLAG_MMIO) { Loading Loading @@ -3407,6 +3621,19 @@ err_out: ata_qc_complete(qc, ATA_ERR); } /** * ata_port_start - Set port up for dma. * @ap: Port to initialize * * Called just after data structures for each port are * initialized. Allocates space for PRD table. * * May be used as the port_start() entry in ata_port_operations. * * LOCKING: */ int ata_port_start (struct ata_port *ap) { struct device *dev = ap->host_set->dev; Loading @@ -3420,6 +3647,18 @@ int ata_port_start (struct ata_port *ap) return 0; } /** * ata_port_stop - Undo ata_port_start() * @ap: Port to shut down * * Frees the PRD table. * * May be used as the port_stop() entry in ata_port_operations. * * LOCKING: */ void ata_port_stop (struct ata_port *ap) { struct device *dev = ap->host_set->dev; Loading Loading @@ -3720,7 +3959,15 @@ int ata_scsi_release(struct Scsi_Host *host) /** * ata_std_ports - initialize ioaddr with standard port offsets. * @ioaddr: IO address structure to be initialized * * Utility function which initializes data_addr, error_addr, * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, * device_addr, status_addr, and command_addr to standard offsets * relative to cmd_addr. * * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. */ void ata_std_ports(struct ata_ioports *ioaddr) { ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; Loading Loading @@ -3762,6 +4009,20 @@ ata_probe_ent_alloc(struct device *dev, struct ata_port_info *port) return probe_ent; } /** * ata_pci_init_native_mode - Initialize native-mode driver * @pdev: pci device to be initialized * @port: array[2] of pointers to port info structures. * * Utility function which allocates and initializes an * ata_probe_ent structure for a standard dual-port * PIO-based IDE controller. The returned ata_probe_ent * structure can be passed to ata_device_add(). The returned * ata_probe_ent structure should then be freed with kfree(). */ #ifdef CONFIG_PCI struct ata_probe_ent * ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port) Loading Loading @@ -3843,6 +4104,14 @@ ata_pci_init_legacy_mode(struct pci_dev *pdev, struct ata_port_info **port, * @port_info: Information from low-level host driver * @n_ports: Number of ports attached to host controller * * This is a helper function which can be called from a driver's * xxx_init_one() probe function if the hardware uses traditional * IDE taskfile registers. * * This function calls pci_enable_device(), reserves its register * regions, sets the dma mask, enables bus master mode, and calls * ata_device_add() * * LOCKING: * Inherited from PCI layer (may sleep). * Loading
include/linux/libata.h +58 −0 Original line number Diff line number Diff line Loading @@ -466,12 +466,34 @@ static inline u8 ata_chk_status(struct ata_port *ap) return ap->ops->check_status(ap); } /** * ata_pause - Flush writes and pause 400 nanoseconds. * @ap: Port to wait for. * * LOCKING: * Inherited from caller. */ static inline void ata_pause(struct ata_port *ap) { ata_altstatus(ap); ndelay(400); } /** * ata_busy_wait - Wait for a port status register * @ap: Port to wait for. * * Waits up to max*10 microseconds for the selected bits in the port's * status register to be cleared. * Returns final value of status register. * * LOCKING: * Inherited from caller. */ static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, unsigned int max) { Loading @@ -486,6 +508,18 @@ static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, return status; } /** * ata_wait_idle - Wait for a port to be idle. * @ap: Port to wait for. * * Waits up to 10ms for port's BUSY and DRQ signals to clear. * Returns final value of status register. * * LOCKING: * Inherited from caller. */ static inline u8 ata_wait_idle(struct ata_port *ap) { u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); Loading Loading @@ -524,6 +558,18 @@ static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, uns tf->device = ATA_DEVICE_OBS | ATA_DEV1; } /** * ata_irq_on - Enable interrupts on a port. * @ap: Port on which interrupts are enabled. * * Enable interrupts on a legacy IDE device using MMIO or PIO, * wait for idle, clear any pending interrupts. * * LOCKING: * Inherited from caller. */ static inline u8 ata_irq_on(struct ata_port *ap) { struct ata_ioports *ioaddr = &ap->ioaddr; Loading @@ -543,6 +589,18 @@ static inline u8 ata_irq_on(struct ata_port *ap) return tmp; } /** * ata_irq_ack - Acknowledge a device interrupt. * @ap: Port on which interrupts are enabled. * * Wait up to 10 ms for legacy IDE device to become idle (BUSY * or BUSY+DRQ clear). Obtain dma status and port status from * device. Clear the interrupt. Return port status. * * LOCKING: */ static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) { unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; Loading
