i2o.h

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 *	SG list if the allocation was successful.
 *
 *	Returns DMA address which must be checked for failures using
 *	dma_mapping_error().
 */
static inline dma_addr_t i2o_dma_map_single(struct i2o_controller *c, void *ptr,
					    size_t size,
					    enum dma_data_direction direction,
					    u32 __iomem ** sg_ptr)
{
	u32 sg_flags;
	u32 __iomem *mptr = *sg_ptr;
	dma_addr_t dma_addr;

	switch (direction) {
	case DMA_TO_DEVICE:
		sg_flags = 0xd4000000;
		break;
	case DMA_FROM_DEVICE:
		sg_flags = 0xd0000000;
		break;
	default:
		return 0;
	}

	dma_addr = dma_map_single(&c->pdev->dev, ptr, size, direction);
	if (!dma_mapping_error(dma_addr)) {
#ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
		if ((sizeof(dma_addr_t) > 4) && c->pae_support) {
			writel(0x7C020002, mptr++);
			writel(PAGE_SIZE, mptr++);
		}
#endif

		writel(sg_flags | size, mptr++);
		writel(i2o_dma_low(dma_addr), mptr++);
#ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
		if ((sizeof(dma_addr_t) > 4) && c->pae_support)
			writel(i2o_dma_high(dma_addr), mptr++);
#endif
		*sg_ptr = mptr;
	}
	return dma_addr;
};

/**
 *	i2o_dma_map_sg - Map a SG List to controller and fill in I2O message.
 *	@c: I2O controller
 *	@sg: SG list to be mapped
 *	@sg_count: number of elements in the SG list
 *	@direction: DMA_TO_DEVICE / DMA_FROM_DEVICE
 *	@sg_ptr: pointer to the SG list inside the I2O message
 *
 *	This function does all necessary DMA handling and also writes the I2O
 *	SGL elements into the I2O message. For details on DMA handling see also
 *	dma_map_sg(). The pointer sg_ptr will only be set to the end of the SG
 *	list if the allocation was successful.
 *
 *	Returns 0 on failure or 1 on success.
 */
static inline int i2o_dma_map_sg(struct i2o_controller *c,
				 struct scatterlist *sg, int sg_count,
				 enum dma_data_direction direction,
				 u32 __iomem ** sg_ptr)
{
	u32 sg_flags;
	u32 __iomem *mptr = *sg_ptr;

	switch (direction) {
	case DMA_TO_DEVICE:
		sg_flags = 0x14000000;
		break;
	case DMA_FROM_DEVICE:
		sg_flags = 0x10000000;
		break;
	default:
		return 0;
	}

	sg_count = dma_map_sg(&c->pdev->dev, sg, sg_count, direction);
	if (!sg_count)
		return 0;

#ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
	if ((sizeof(dma_addr_t) > 4) && c->pae_support) {
		writel(0x7C020002, mptr++);
		writel(PAGE_SIZE, mptr++);
	}
#endif

	while (sg_count-- > 0) {
		if (!sg_count)
			sg_flags |= 0xC0000000;
		writel(sg_flags | sg_dma_len(sg), mptr++);
		writel(i2o_dma_low(sg_dma_address(sg)), mptr++);
#ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
		if ((sizeof(dma_addr_t) > 4) && c->pae_support)
			writel(i2o_dma_high(sg_dma_address(sg)), mptr++);
#endif
		sg++;
	}
	*sg_ptr = mptr;

	return 1;
};

/**
 *	i2o_dma_alloc - Allocate DMA memory
 *	@dev: struct device pointer to the PCI device of the I2O controller
 *	@addr: i2o_dma struct which should get the DMA buffer
 *	@len: length of the new DMA memory
 *	@gfp_mask: GFP mask
 *
 *	Allocate a coherent DMA memory and write the pointers into addr.
 *
 *	Returns 0 on success or -ENOMEM on failure.
 */
static inline int i2o_dma_alloc(struct device *dev, struct i2o_dma *addr,
				size_t len, unsigned int gfp_mask)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	int dma_64 = 0;

	if ((sizeof(dma_addr_t) > 4) && (pdev->dma_mask == DMA_64BIT_MASK)) {
		dma_64 = 1;
		if (pci_set_dma_mask(pdev, DMA_32BIT_MASK))
			return -ENOMEM;
	}

	addr->virt = dma_alloc_coherent(dev, len, &addr->phys, gfp_mask);

	if ((sizeof(dma_addr_t) > 4) && dma_64)
		if (pci_set_dma_mask(pdev, DMA_64BIT_MASK))
			printk(KERN_WARNING "i2o: unable to set 64-bit DMA");

	if (!addr->virt)
		return -ENOMEM;

	memset(addr->virt, 0, len);
	addr->len = len;

	return 0;
};

/**
 *	i2o_dma_free - Free DMA memory
 *	@dev: struct device pointer to the PCI device of the I2O controller
 *	@addr: i2o_dma struct which contains the DMA buffer
 *
 *	Free a coherent DMA memory and set virtual address of addr to NULL.
 */
static inline void i2o_dma_free(struct device *dev, struct i2o_dma *addr)
{
	if (addr->virt) {
		if (addr->phys)
			dma_free_coherent(dev, addr->len, addr->virt,
					  addr->phys);
		else
			kfree(addr->virt);
		addr->virt = NULL;
	}
};

/**
 *	i2o_dma_realloc - Realloc DMA memory
 *	@dev: struct device pointer to the PCI device of the I2O controller
 *	@addr: pointer to a i2o_dma struct DMA buffer
 *	@len: new length of memory
 *	@gfp_mask: GFP mask
 *
 *	If there was something allocated in the addr, free it first. If len > 0
 *	than try to allocate it and write the addresses back to the addr
 *	structure. If len == 0 set the virtual address to NULL.
 *
 *	Returns the 0 on success or negative error code on failure.
 */
static inline int i2o_dma_realloc(struct device *dev, struct i2o_dma *addr,
				  size_t len, unsigned int gfp_mask)
{
	i2o_dma_free(dev, addr);

	if (len)
		return i2o_dma_alloc(dev, addr, len, gfp_mask);

	return 0;
};

/* I2O driver (OSM) functions */
extern int i2o_driver_register(struct i2o_driver *);
extern void i2o_driver_unregister(struct i2o_driver *);

/**
 *	i2o_driver_notify_controller_add - Send notification of added controller
 *					   to a single I2O driver
 *
 *	Send notification of added controller to a single registered driver.
 */
static inline void i2o_driver_notify_controller_add(struct i2o_driver *drv,
						    struct i2o_controller *c)
{
	if (drv->notify_controller_add)
		drv->notify_controller_add(c);
};

/**
 *	i2o_driver_notify_controller_remove - Send notification of removed
 *					      controller to a single I2O driver
 *
 *	Send notification of removed controller to a single registered driver.
 */
static inline void i2o_driver_notify_controller_remove(struct i2o_driver *drv,
						       struct i2o_controller *c)
{
	if (drv->notify_controller_remove)
		drv->notify_controller_remove(c);
};

/**
 *	i2o_driver_notify_device_add - Send notification of added device to a
 *				       single I2O driver
 *
 *	Send notification of added device to a single registered driver.
 */
static inline void i2o_driver_notify_device_add(struct i2o_driver *drv,
						struct i2o_device *i2o_dev)
{
	if (drv->notify_device_add)
		drv->notify_device_add(i2o_dev);
};

/**
 *	i2o_driver_notify_device_remove - Send notification of removed device
 *					  to a single I2O driver
 *
 *	Send notification of removed device to a single registered driver.
 */
static inline void i2o_driver_notify_device_remove(struct i2o_driver *drv,
						   struct i2o_device *i2o_dev)
{
	if (drv->notify_device_remove)
		drv->notify_device_remove(i2o_dev);
};

extern void i2o_driver_notify_controller_add_all(struct i2o_controller *);
extern void i2o_driver_notify_controller_remove_all(struct i2o_controller *);
extern void i2o_driver_notify_device_add_all(struct i2o_device *);
extern void i2o_driver_notify_device_remove_all(struct i2o_device *);

/* I2O device functions */
extern int i2o_device_claim(struct i2o_device *);
extern int i2o_device_claim_release(struct i2o_device *);

/* Exec OSM functions */
extern int i2o_exec_lct_get(struct i2o_controller *);

/* device / driver / kobject conversion functions */
#define to_i2o_driver(drv) container_of(drv,struct i2o_driver, driver)
#define to_i2o_device(dev) container_of(dev, struct i2o_device, device)
#define to_i2o_controller(dev) container_of(dev, struct i2o_controller, device)
#define kobj_to_i2o_device(kobj) to_i2o_device(container_of(kobj, struct device, kobj))

/**
 *	i2o_msg_get - obtain an I2O message from the IOP
 *	@c: I2O controller
 *	@msg: pointer to a I2O message pointer
 *
 *	This function tries to get a message slot. If no message slot is
 *	available do not wait until one is availabe (see also i2o_msg_get_wait).
 *
 *	On a success the message is returned and the pointer to the message is
 *	set in msg. The returned message is the physical page frame offset
 *	address from the read port (see the i2o spec). If no message is
 *	available returns I2O_QUEUE_EMPTY and msg is leaved untouched.
 */
static inline u32 i2o_msg_get(struct i2o_controller *c,
			      struct i2o_message __iomem ** msg)
{
	u32 m = readl(c->in_port);

	if (m != I2O_QUEUE_EMPTY)
		*msg = c->in_queue.virt + m;

	return m;
};

/**
 *	i2o_msg_post - Post I2O message to I2O controller
 *	@c: I2O controller to which the message should be send
 *	@m: the message identifier
 *
 *	Post the message to the I2O controller.
 */
static inline void i2o_msg_post(struct i2o_controller *c, u32 m)
{
	writel(m, c->in_port);
};

/**
 * 	i2o_msg_post_wait - Post and wait a message and wait until return
 *	@c: controller
 *	@m: message to post
 *	@timeout: time in seconds to wait
 *
 * 	This API allows an OSM to post a message and then be told whether or
 *	not the system received a successful reply. If the message times out
 *	then the value '-ETIMEDOUT' is returned.
 *
 *	Returns 0 on success or negative error code on failure.
 */
static inline int i2o_msg_post_wait(struct i2o_controller *c, u32 m,
				    unsigned long timeout)
{
	return i2o_msg_post_wait_mem(c, m, timeout, NULL);
};

/**
 *	i2o_flush_reply - Flush reply from I2O controller
 *	@c: I2O controller
 *	@m: the message identifier
 *
 *	The I2O controller must be informed that the reply message is not needed
 *	anymore. If you forget to flush the reply, the message frame can't be
 *	used by the controller anymore and is therefore lost.
 */
static inline void i2o_flush_reply(struct i2o_controller *c, u32 m)
{
	writel(m, c->out_port);
};

/**
 *	i2o_out_to_virt - Turn an I2O message to a virtual address
 *	@c: controller
 *	@m: message engine value
 *
 *	Turn a receive message from an I2O controller bus address into
 *	a Linux virtual address. The shared page frame is a linear block
 *	so we simply have to shift the offset. This function does not
 *	work for sender side messages as they are ioremap objects
 *	provided by the I2O controller.
 */
static inline struct i2o_message *i2o_msg_out_to_virt(struct i2o_controller *c,
						      u32 m)
{
	BUG_ON(m < c->out_queue.phys
	       || m >= c->out_queue.phys + c->out_queue.len);

	return c->out_queue.virt + (m - c->out_queue.phys);
};

/**
 *	i2o_msg_in_to_virt - Turn an I2O message to a virtual address
 *	@c: controller
 *	@m: message engine value
 *
 *	Turn a send message from an I2O controller bus address into
 *	a Linux virtual address. The shared page frame is a linear block
 *	so we simply have to shift the offset. This function does not
 *	work for receive side messages as they are kmalloc objects
 *	in a different pool.
 */
static inline struct i2o_message __iomem *i2o_msg_in_to_virt(struct
							     i2o_controller *c,
							     u32 m)
{
	return c->in_queue.virt + m;
};

/*
 *	Endian handling wrapped into the macro - keeps the core code
 *	cleaner.
 */

#define i2o_raw_writel(val, mem)	__raw_writel(cpu_to_le32(val), mem)

extern int i2o_parm_field_get(struct i2o_device *, int, int, void *, int);
extern int i2o_parm_table_get(struct i2o_device *, int, int, int, void *, int,