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Commit 71b720c0 authored by Rajesh Shah's avatar Rajesh Shah Committed by Greg Kroah-Hartman
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[PATCH] patch 1/8] pciehp: use the PCI core for hotplug resource management 



This patch converts the pci express hotplug controller driver
to use the PCI core for resource management. This eliminates a
lot of duplicated code and integrates pciehp with the system's
normal PCI handling code.

Signed-off-by: default avatarRajesh Shah <rajesh.shah@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 24a4e377

drivers/pci/hotplug/pciehp.h

+1 −49
Original line number Diff line number Diff line
@@ -59,14 +59,8 @@ struct pci_func { 
	u8 configured;

	u8 switch_save;

	u8 presence_save;

	u32 base_length[0x06];

	u8 base_type[0x06];

	u16 reserved2;

	u32 config_space[0x20];

	struct pci_resource *mem_head;

	struct pci_resource *p_mem_head;

	struct pci_resource *io_head;

	struct pci_resource *bus_head;

	struct pci_dev* pci_dev;

};
@@ -90,12 +84,6 @@ struct slot { 
	struct list_head	slot_list;

};



struct pci_resource {

	struct pci_resource * next;

	u32 base;

	u32 length;

};



struct event_info {

	u32 event_type;

	u8 hp_slot;
@@ -107,10 +95,6 @@ struct controller { 
	void *hpc_ctlr_handle;		/* HPC controller handle */

	int num_slots;			/* Number of slots on ctlr */

	int slot_num_inc;		/* 1 or -1 */

	struct pci_resource *mem_head;

	struct pci_resource *p_mem_head;

	struct pci_resource *io_head;

	struct pci_resource *bus_head;

	struct pci_dev *pci_dev;

	struct pci_bus *pci_bus;

	struct event_info event_queue[10];
@@ -133,20 +117,6 @@ struct controller { 
	u8 cap_base;

};



struct irq_mapping {

	u8 barber_pole;

	u8 valid_INT;

	u8 interrupt[4];

};



struct resource_lists {

	struct pci_resource *mem_head;

	struct pci_resource *p_mem_head;

	struct pci_resource *io_head;

	struct pci_resource *bus_head;

	struct irq_mapping *irqs;

};



#define INT_BUTTON_IGNORE		0

#define INT_PRESENCE_ON			1

#define INT_PRESENCE_OFF		2
@@ -203,14 +173,12 @@ struct resource_lists { 
#define msg_HPC_rev_error	"Unsupported revision of the PCI hot plug controller found.\n"

#define msg_HPC_non_pcie	"The PCI hot plug controller is not supported by this driver.\n"

#define msg_HPC_not_supported	"This system is not supported by this version of pciephd module. Upgrade to a newer version of pciehpd\n"

#define msg_unable_to_save	"Unable to store PCI hot plug add resource information. This system must be rebooted before adding any PCI devices.\n"

#define msg_button_on		"PCI slot #%d - powering on due to button press.\n"

#define msg_button_off		"PCI slot #%d - powering off due to button press.\n"

#define msg_button_cancel	"PCI slot #%d - action canceled due to button press.\n"

#define msg_button_ignore	"PCI slot #%d - button press ignored.  (action in progress...)\n"



/* controller functions */

extern int	pciehprm_find_available_resources	(struct controller *ctrl);

extern int	pciehp_event_start_thread	(void);

extern void	pciehp_event_stop_thread	(void);

extern struct 	pci_func *pciehp_slot_create	(unsigned char busnumber);
@@ -224,19 +192,12 @@ extern u8 pciehp_handle_presence_change (u8 hp_slot, void *inst_id); 
extern u8	pciehp_handle_power_fault	(u8 hp_slot, void *inst_id);

/* extern void	long_delay (int delay); */



/* resource functions */

extern int	pciehp_resource_sort_and_combine	(struct pci_resource **head);



/* pci functions */

extern int	pciehp_set_irq			(u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num);

/*extern int	pciehp_get_bus_dev		(struct controller *ctrl, u8 *bus_num, u8 *dev_num, struct slot *slot);*/

extern int	pciehp_save_config	 	(struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);

extern int	pciehp_save_used_resources	(struct controller *ctrl, struct pci_func * func, int flag);

extern int	pciehp_save_slot_config		(struct controller *ctrl, struct pci_func * new_slot);

extern void	pciehp_destroy_board_resources	(struct pci_func * func);

extern int	pciehp_return_board_resources	(struct pci_func * func, struct resource_lists * resources);

extern void	pciehp_destroy_resource_list	(struct resource_lists * resources);

extern int	pciehp_configure_device		(struct controller* ctrl, struct pci_func* func);

extern int	pciehp_configure_device		(struct slot *ctrl);

extern int	pciehp_unconfigure_device	(struct pci_func* func);
@@ -289,15 +250,6 @@ static inline int wait_for_ctrl_irq(struct controller *ctrl) 
	return retval;

}



/* Puts node back in the resource list pointed to by head */

static inline void return_resource(struct pci_resource **head, struct pci_resource *node)

{

	if (!node || !head)

		return;

	node->next = *head;

	*head = node;

}



#define SLOT_NAME_SIZE 10



static inline void make_slot_name(char *buffer, int buffer_size, struct slot *slot)

drivers/pci/hotplug/pciehp_core.c

+2 −33
Original line number Diff line number Diff line
@@ -433,15 +433,7 @@ static int pciehp_probe(struct pcie_device *dev, const struct pcie_port_service_ 
		goto err_out_free_ctrl_bus;

	}



	/* Get IO, memory, and IRQ resources for new devices */

	rc = pciehprm_find_available_resources(ctrl);

	ctrl->add_support = !rc;

	

	if (rc) {

		dbg("pciehprm_find_available_resources = %#x\n", rc);

		err("unable to locate PCI configuration resources for hot plug add.\n");

		goto err_out_free_ctrl_bus;

	}

	ctrl->add_support = 1;

	

	/* Setup the slot information structures */

	rc = init_slots(ctrl);
@@ -521,18 +513,6 @@ static int pcie_start_thread(void) 
	return retval;

}



static inline void __exit

free_pciehp_res(struct pci_resource *res)

{

	struct pci_resource *tres;



	while (res) {

		tres = res;

		res = res->next;

		kfree(tres);

	}

}



static void __exit unload_pciehpd(void)

{

	struct pci_func *next;
@@ -546,11 +526,6 @@ static void __exit unload_pciehpd(void) 
	while (ctrl) {

		cleanup_slots(ctrl);



		free_pciehp_res(ctrl->io_head);

		free_pciehp_res(ctrl->mem_head);

		free_pciehp_res(ctrl->p_mem_head);

		free_pciehp_res(ctrl->bus_head);



		kfree (ctrl->pci_bus);



		ctrl->hpc_ops->release_ctlr(ctrl);
@@ -564,11 +539,6 @@ static void __exit unload_pciehpd(void) 
	for (loop = 0; loop < 256; loop++) {

		next = pciehp_slot_list[loop];

		while (next != NULL) {

			free_pciehp_res(next->io_head);

			free_pciehp_res(next->mem_head);

			free_pciehp_res(next->p_mem_head);

			free_pciehp_res(next->bus_head);



			TempSlot = next;

			next = next->next;

			kfree(TempSlot);
@@ -652,8 +622,7 @@ static int __init pcied_init(void) 
	if (retval) {

		pciehprm_cleanup();

		pciehp_event_stop_thread();

	} else

		pciehprm_print_pirt();

	};



	return retval;

}