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Commit 24a4742f authored by Alex Williamson's avatar Alex Williamson Committed by Jesse Barnes
Browse files

PCI: Track the size of each saved capability data area 



This will allow us to store and load it later.

Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
parent 9f728f53

drivers/pci/pci.c

+7 −5
Original line number Diff line number Diff line
@@ -830,7 +830,7 @@ static int pci_save_pcie_state(struct pci_dev *dev) 
		dev_err(&dev->dev, "buffer not found in %s\n", __func__);

		return -ENOMEM;

	}

	cap = (u16 *)&save_state->data[0];

	cap = (u16 *)&save_state->cap.data[0];



	pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags);
@@ -863,7 +863,7 @@ static void pci_restore_pcie_state(struct pci_dev *dev) 
	pos = pci_find_capability(dev, PCI_CAP_ID_EXP);

	if (!save_state || pos <= 0)

		return;

	cap = (u16 *)&save_state->data[0];

	cap = (u16 *)&save_state->cap.data[0];



	pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags);
@@ -899,7 +899,8 @@ static int pci_save_pcix_state(struct pci_dev *dev) 
		return -ENOMEM;

	}



	pci_read_config_word(dev, pos + PCI_X_CMD, (u16 *)save_state->data);

	pci_read_config_word(dev, pos + PCI_X_CMD,

			     (u16 *)save_state->cap.data);



	return 0;

}
@@ -914,7 +915,7 @@ static void pci_restore_pcix_state(struct pci_dev *dev) 
	pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);

	if (!save_state || pos <= 0)

		return;

	cap = (u16 *)&save_state->data[0];

	cap = (u16 *)&save_state->cap.data[0];



	pci_write_config_word(dev, pos + PCI_X_CMD, cap[i++]);

}
@@ -1771,7 +1772,8 @@ static int pci_add_cap_save_buffer( 
	if (!save_state)

		return -ENOMEM;



	save_state->cap_nr = cap;

	save_state->cap.cap_nr = cap;

	save_state->cap.size = size;

	pci_add_saved_cap(dev, save_state);



	return 0;

include/linux/pci.h

+8 −3
Original line number Diff line number Diff line
@@ -214,12 +214,17 @@ enum pci_bus_speed { 
	PCI_SPEED_UNKNOWN		= 0xff,

};



struct pci_cap_saved_state {

	struct hlist_node next;

struct pci_cap_saved_data {

	char cap_nr;

	unsigned int size;

	u32 data[0];

};



struct pci_cap_saved_state {

	struct hlist_node next;

	struct pci_cap_saved_data cap;

};



struct pcie_link_state;

struct pci_vpd;

struct pci_sriov;
@@ -366,7 +371,7 @@ static inline struct pci_cap_saved_state *pci_find_saved_cap( 
	struct hlist_node *pos;



	hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {

		if (tmp->cap_nr == cap)

		if (tmp->cap.cap_nr == cap)

			return tmp;

	}

	return NULL;