diff options
author | Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> | 2009-05-13 12:17:44 +0900 |
---|---|---|
committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-06-18 13:57:26 -0700 |
commit | 5aa63583cbec27482c6f1d761a0509f59b7969a8 (patch) | |
tree | a989edcd7e85199aee66eff2f087dfd6d94176bb /drivers/pci/pcie/aspm.c | |
parent | 5cde89d80172a393e49077d2450545b97ac8d972 (diff) |
PCI ASPM: cleanup change input argument of aspm functions
In the current ASPM implementation, there are many functions that
take a pointer to struct pci_dev corresponding to the upstream component
of the link as a parameter. But, since those functions handle PCI
express link state, a pointer to struct pcie_link_state is more
suitable than a pointer to struct pci_dev. Changing a parameter to a
pointer to struct pcie_link_state makes ASPM code much simpler and
easier to read. This patch also contains some minor cleanups. This patch
doesn't have any functional change.
Acked-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/pcie/aspm.c')
-rw-r--r-- | drivers/pci/pcie/aspm.c | 372 |
1 files changed, 173 insertions, 199 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index a1ae9b6f399..9eaaf95f65a 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -75,10 +75,8 @@ static const char *policy_str[] = { #define LINK_RETRAIN_TIMEOUT HZ -static int policy_to_aspm_state(struct pci_dev *pdev) +static int policy_to_aspm_state(struct pcie_link_state *link) { - struct pcie_link_state *link_state = pdev->link_state; - switch (aspm_policy) { case POLICY_PERFORMANCE: /* Disable ASPM and Clock PM */ @@ -87,15 +85,13 @@ static int policy_to_aspm_state(struct pci_dev *pdev) /* Enable ASPM L0s/L1 */ return PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1; case POLICY_DEFAULT: - return link_state->aspm_default; + return link->aspm_default; } return 0; } -static int policy_to_clkpm_state(struct pci_dev *pdev) +static int policy_to_clkpm_state(struct pcie_link_state *link) { - struct pcie_link_state *link_state = pdev->link_state; - switch (aspm_policy) { case POLICY_PERFORMANCE: /* Disable ASPM and Clock PM */ @@ -104,73 +100,73 @@ static int policy_to_clkpm_state(struct pci_dev *pdev) /* Disable Clock PM */ return 1; case POLICY_DEFAULT: - return link_state->clkpm_default; + return link->clkpm_default; } return 0; } -static void pcie_set_clock_pm(struct pci_dev *pdev, int enable) +static void pcie_set_clock_pm(struct pcie_link_state *link, int enable) { - struct pci_dev *child_dev; int pos; u16 reg16; - struct pcie_link_state *link_state = pdev->link_state; + struct pci_dev *child; + struct pci_bus *linkbus = link->pdev->subordinate; - list_for_each_entry(child_dev, &pdev->subordinate->devices, bus_list) { - pos = pci_find_capability(child_dev, PCI_CAP_ID_EXP); + list_for_each_entry(child, &linkbus->devices, bus_list) { + pos = pci_find_capability(child, PCI_CAP_ID_EXP); if (!pos) return; - pci_read_config_word(child_dev, pos + PCI_EXP_LNKCTL, ®16); + pci_read_config_word(child, pos + PCI_EXP_LNKCTL, ®16); if (enable) reg16 |= PCI_EXP_LNKCTL_CLKREQ_EN; else reg16 &= ~PCI_EXP_LNKCTL_CLKREQ_EN; - pci_write_config_word(child_dev, pos + PCI_EXP_LNKCTL, reg16); + pci_write_config_word(child, pos + PCI_EXP_LNKCTL, reg16); } - link_state->clkpm_enabled = !!enable; + link->clkpm_enabled = !!enable; } -static void pcie_check_clock_pm(struct pci_dev *pdev, int blacklist) +static void pcie_check_clock_pm(struct pcie_link_state *link, int blacklist) { - int pos; + int pos, capable = 1, enabled = 1; u32 reg32; u16 reg16; - int capable = 1, enabled = 1; - struct pci_dev *child_dev; - struct pcie_link_state *link_state = pdev->link_state; + struct pci_dev *child; + struct pci_bus *linkbus = link->pdev->subordinate; /* All functions should have the same cap and state, take the worst */ - list_for_each_entry(child_dev, &pdev->subordinate->devices, bus_list) { - pos = pci_find_capability(child_dev, PCI_CAP_ID_EXP); + list_for_each_entry(child, &linkbus->devices, bus_list) { + pos = pci_find_capability(child, PCI_CAP_ID_EXP); if (!pos) return; - pci_read_config_dword(child_dev, pos + PCI_EXP_LNKCAP, ®32); + pci_read_config_dword(child, pos + PCI_EXP_LNKCAP, ®32); if (!(reg32 & PCI_EXP_LNKCAP_CLKPM)) { capable = 0; enabled = 0; break; } - pci_read_config_word(child_dev, pos + PCI_EXP_LNKCTL, ®16); + pci_read_config_word(child, pos + PCI_EXP_LNKCTL, ®16); if (!(reg16 & PCI_EXP_LNKCTL_CLKREQ_EN)) enabled = 0; } - link_state->clkpm_enabled = enabled; - link_state->clkpm_default = enabled; + link->clkpm_enabled = enabled; + link->clkpm_default = enabled; if (!blacklist) { - link_state->clkpm_capable = capable; - pcie_set_clock_pm(pdev, policy_to_clkpm_state(pdev)); + link->clkpm_capable = capable; + pcie_set_clock_pm(link, policy_to_clkpm_state(link)); } else { - link_state->clkpm_capable = 0; - pcie_set_clock_pm(pdev, 0); + link->clkpm_capable = 0; + pcie_set_clock_pm(link, 0); } } -static bool pcie_aspm_downstream_has_switch(struct pci_dev *pdev) +static bool pcie_aspm_downstream_has_switch(struct pcie_link_state *link) { - struct pci_dev *child_dev; + struct pci_dev *child; + struct pci_bus *linkbus = link->pdev->subordinate; - list_for_each_entry(child_dev, &pdev->subordinate->devices, bus_list) { - if (child_dev->pcie_type == PCI_EXP_TYPE_UPSTREAM) + list_for_each_entry(child, &linkbus->devices, bus_list) { + if (child->pcie_type == PCI_EXP_TYPE_UPSTREAM) return true; } return false; @@ -181,89 +177,79 @@ static bool pcie_aspm_downstream_has_switch(struct pci_dev *pdev) * could use common clock. If they are, configure them to use the * common clock. That will reduce the ASPM state exit latency. */ -static void pcie_aspm_configure_common_clock(struct pci_dev *pdev) +static void pcie_aspm_configure_common_clock(struct pcie_link_state *link) { - int pos, child_pos, i = 0; - u16 reg16 = 0; - struct pci_dev *child_dev; - int same_clock = 1; + int ppos, cpos, same_clock = 1; + u16 reg16, parent_reg, child_reg[8]; unsigned long start_jiffies; - u16 child_regs[8], parent_reg; + struct pci_dev *child, *parent = link->pdev; + struct pci_bus *linkbus = parent->subordinate; /* - * all functions of a slot should have the same Slot Clock + * All functions of a slot should have the same Slot Clock * Configuration, so just check one function - * */ - child_dev = list_entry(pdev->subordinate->devices.next, struct pci_dev, - bus_list); - BUG_ON(!child_dev->is_pcie); + */ + child = list_entry(linkbus->devices.next, struct pci_dev, bus_list); + BUG_ON(!child->is_pcie); /* Check downstream component if bit Slot Clock Configuration is 1 */ - child_pos = pci_find_capability(child_dev, PCI_CAP_ID_EXP); - pci_read_config_word(child_dev, child_pos + PCI_EXP_LNKSTA, ®16); + cpos = pci_find_capability(child, PCI_CAP_ID_EXP); + pci_read_config_word(child, cpos + PCI_EXP_LNKSTA, ®16); if (!(reg16 & PCI_EXP_LNKSTA_SLC)) same_clock = 0; /* Check upstream component if bit Slot Clock Configuration is 1 */ - pos = pci_find_capability(pdev, PCI_CAP_ID_EXP); - pci_read_config_word(pdev, pos + PCI_EXP_LNKSTA, ®16); + ppos = pci_find_capability(parent, PCI_CAP_ID_EXP); + pci_read_config_word(parent, ppos + PCI_EXP_LNKSTA, ®16); if (!(reg16 & PCI_EXP_LNKSTA_SLC)) same_clock = 0; /* Configure downstream component, all functions */ - list_for_each_entry(child_dev, &pdev->subordinate->devices, bus_list) { - child_pos = pci_find_capability(child_dev, PCI_CAP_ID_EXP); - pci_read_config_word(child_dev, child_pos + PCI_EXP_LNKCTL, - ®16); - child_regs[i] = reg16; + list_for_each_entry(child, &linkbus->devices, bus_list) { + cpos = pci_find_capability(child, PCI_CAP_ID_EXP); + pci_read_config_word(child, cpos + PCI_EXP_LNKCTL, ®16); + child_reg[PCI_FUNC(child->devfn)] = reg16; if (same_clock) reg16 |= PCI_EXP_LNKCTL_CCC; else reg16 &= ~PCI_EXP_LNKCTL_CCC; - pci_write_config_word(child_dev, child_pos + PCI_EXP_LNKCTL, - reg16); - i++; + pci_write_config_word(child, cpos + PCI_EXP_LNKCTL, reg16); } /* Configure upstream component */ - pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, ®16); + pci_read_config_word(parent, ppos + PCI_EXP_LNKCTL, ®16); parent_reg = reg16; if (same_clock) reg16 |= PCI_EXP_LNKCTL_CCC; else reg16 &= ~PCI_EXP_LNKCTL_CCC; - pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, reg16); + pci_write_config_word(parent, ppos + PCI_EXP_LNKCTL, reg16); - /* retrain link */ + /* Retrain link */ reg16 |= PCI_EXP_LNKCTL_RL; - pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, reg16); + pci_write_config_word(parent, ppos + PCI_EXP_LNKCTL, reg16); - /* Wait for link training end */ - /* break out after waiting for timeout */ + /* Wait for link training end. Break out after waiting for timeout */ start_jiffies = jiffies; for (;;) { - pci_read_config_word(pdev, pos + PCI_EXP_LNKSTA, ®16); + pci_read_config_word(parent, ppos + PCI_EXP_LNKSTA, ®16); if (!(reg16 & PCI_EXP_LNKSTA_LT)) break; if (time_after(jiffies, start_jiffies + LINK_RETRAIN_TIMEOUT)) break; msleep(1); } - /* training failed -> recover */ - if (reg16 & PCI_EXP_LNKSTA_LT) { - dev_printk (KERN_ERR, &pdev->dev, "ASPM: Could not configure" - " common clock\n"); - i = 0; - list_for_each_entry(child_dev, &pdev->subordinate->devices, - bus_list) { - child_pos = pci_find_capability(child_dev, - PCI_CAP_ID_EXP); - pci_write_config_word(child_dev, - child_pos + PCI_EXP_LNKCTL, - child_regs[i]); - i++; - } - pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, parent_reg); + if (!(reg16 & PCI_EXP_LNKSTA_LT)) + return; + + /* Training failed. Restore common clock configurations */ + dev_printk(KERN_ERR, &parent->dev, + "ASPM: Could not configure common clock\n"); + list_for_each_entry(child, &linkbus->devices, bus_list) { + cpos = pci_find_capability(child, PCI_CAP_ID_EXP); + pci_write_config_word(child, cpos + PCI_EXP_LNKCTL, + child_reg[PCI_FUNC(child->devfn)]); } + pci_write_config_word(parent, ppos + PCI_EXP_LNKCTL, parent_reg); } /* @@ -328,51 +314,50 @@ static void pcie_aspm_get_cap_device(struct pci_dev *pdev, u32 *state, *enabled = reg16 & (PCIE_LINK_STATE_L0S|PCIE_LINK_STATE_L1); } -static void pcie_aspm_cap_init(struct pci_dev *pdev) +static void pcie_aspm_cap_init(struct pcie_link_state *link) { - struct pci_dev *child_dev; u32 support, l0s, l1, enabled; - struct pcie_link_state *link_state = pdev->link_state; + struct pci_dev *child, *parent = link->pdev; + struct pci_bus *linkbus = parent->subordinate; /* upstream component states */ - pcie_aspm_get_cap_device(pdev, &support, &l0s, &l1, &enabled); - link_state->aspm_support = support; - link_state->latency.l0s = l0s; - link_state->latency.l1 = l1; - link_state->aspm_enabled = enabled; + pcie_aspm_get_cap_device(parent, &support, &l0s, &l1, &enabled); + link->aspm_support = support; + link->latency.l0s = l0s; + link->latency.l1 = l1; + link->aspm_enabled = enabled; /* downstream component states, all functions have the same setting */ - child_dev = list_entry(pdev->subordinate->devices.next, struct pci_dev, - bus_list); - pcie_aspm_get_cap_device(child_dev, &support, &l0s, &l1, &enabled); - link_state->aspm_support &= support; - link_state->latency.l0s = max_t(u32, link_state->latency.l0s, l0s); - link_state->latency.l1 = max_t(u32, link_state->latency.l1, l1); - - if (!link_state->aspm_support) + child = list_entry(linkbus->devices.next, struct pci_dev, bus_list); + pcie_aspm_get_cap_device(child, &support, &l0s, &l1, &enabled); + link->aspm_support &= support; + link->latency.l0s = max_t(u32, link->latency.l0s, l0s); + link->latency.l1 = max_t(u32, link->latency.l1, l1); + + if (!link->aspm_support) return; - link_state->aspm_enabled &= link_state->aspm_support; - link_state->aspm_default = link_state->aspm_enabled; + link->aspm_enabled &= link->aspm_support; + link->aspm_default = link->aspm_enabled; /* ENDPOINT states*/ - list_for_each_entry(child_dev, &pdev->subordinate->devices, bus_list) { + list_for_each_entry(child, &linkbus->devices, bus_list) { int pos; u32 reg32; unsigned int latency; struct aspm_latency *acceptable = - &link_state->acceptable[PCI_FUNC(child_dev->devfn)]; + &link->acceptable[PCI_FUNC(child->devfn)]; - if (child_dev->pcie_type != PCI_EXP_TYPE_ENDPOINT && - child_dev->pcie_type != PCI_EXP_TYPE_LEG_END) + if (child->pcie_type != PCI_EXP_TYPE_ENDPOINT && + child->pcie_type != PCI_EXP_TYPE_LEG_END) continue; - pos = pci_find_capability(child_dev, PCI_CAP_ID_EXP); - pci_read_config_dword(child_dev, pos + PCI_EXP_DEVCAP, ®32); + pos = pci_find_capability(child, PCI_CAP_ID_EXP); + pci_read_config_dword(child, pos + PCI_EXP_DEVCAP, ®32); latency = (reg32 & PCI_EXP_DEVCAP_L0S) >> 6; latency = calc_L0S_latency(latency, 1); acceptable->l0s = latency; - if (link_state->aspm_support & PCIE_LINK_STATE_L1) { + if (link->aspm_support & PCIE_LINK_STATE_L1) { latency = (reg32 & PCI_EXP_DEVCAP_L1) >> 9; latency = calc_L1_latency(latency, 1); acceptable->l1 = latency; @@ -434,33 +419,33 @@ static unsigned int __pcie_aspm_check_state_one(struct pci_dev *pdev, return state; } -static unsigned int pcie_aspm_check_state(struct pci_dev *pdev, - unsigned int state) +static u32 pcie_aspm_check_state(struct pcie_link_state *link, u32 state) { - struct pci_dev *child_dev; + pci_power_t power_state; + struct pci_dev *child; + struct pci_bus *linkbus = link->pdev->subordinate; /* If no child, ignore the link */ - if (list_empty(&pdev->subordinate->devices)) + if (list_empty(&linkbus->devices)) return state; - list_for_each_entry(child_dev, &pdev->subordinate->devices, bus_list) { - if (child_dev->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE) { - /* - * If downstream component of a link is pci bridge, we - * disable ASPM for now for the link - * */ - state = 0; - break; - } - if ((child_dev->pcie_type != PCI_EXP_TYPE_ENDPOINT && - child_dev->pcie_type != PCI_EXP_TYPE_LEG_END)) + + list_for_each_entry(child, &linkbus->devices, bus_list) { + /* + * If downstream component of a link is pci bridge, we + * disable ASPM for now for the link + */ + if (child->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE) + return 0; + + if ((child->pcie_type != PCI_EXP_TYPE_ENDPOINT && + child->pcie_type != PCI_EXP_TYPE_LEG_END)) continue; /* Device not in D0 doesn't need check latency */ - if (child_dev->current_state == PCI_D1 || - child_dev->current_state == PCI_D2 || - child_dev->current_state == PCI_D3hot || - child_dev->current_state == PCI_D3cold) + power_state = child->current_state; + if (power_state == PCI_D1 || power_state == PCI_D2 || + power_state == PCI_D3hot || power_state == PCI_D3cold) continue; - state = __pcie_aspm_check_state_one(child_dev, state); + state = __pcie_aspm_check_state_one(child, state); } return state; } @@ -476,44 +461,38 @@ static void __pcie_aspm_config_one_dev(struct pci_dev *pdev, unsigned int state) pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, reg16); } -static void __pcie_aspm_config_link(struct pci_dev *pdev, unsigned int state) +static void __pcie_aspm_config_link(struct pcie_link_state *link, u32 state) { - struct pci_dev *child_dev; - int valid = 1; - struct pcie_link_state *link_state = pdev->link_state; + struct pci_dev *child, *parent = link->pdev; + struct pci_bus *linkbus = parent->subordinate; /* If no child, disable the link */ - if (list_empty(&pdev->subordinate->devices)) + if (list_empty(&linkbus->devices)) state = 0; /* - * if the downstream component has pci bridge function, don't do ASPM - * now + * If the downstream component has pci bridge function, don't + * do ASPM now. */ - list_for_each_entry(child_dev, &pdev->subordinate->devices, bus_list) { - if (child_dev->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE) { - valid = 0; - break; - } + list_for_each_entry(child, &linkbus->devices, bus_list) { + if (child->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE) + return; } - if (!valid) - return; - /* - * spec 2.0 suggests all functions should be configured the same - * setting for ASPM. Enabling ASPM L1 should be done in upstream - * component first and then downstream, and vice versa for disabling - * ASPM L1. Spec doesn't mention L0S. + * Spec 2.0 suggests all functions should be configured the + * same setting for ASPM. Enabling ASPM L1 should be done in + * upstream component first and then downstream, and vice + * versa for disabling ASPM L1. Spec doesn't mention L0S. */ if (state & PCIE_LINK_STATE_L1) - __pcie_aspm_config_one_dev(pdev, state); + __pcie_aspm_config_one_dev(parent, state); - list_for_each_entry(child_dev, &pdev->subordinate->devices, bus_list) - __pcie_aspm_config_one_dev(child_dev, state); + list_for_each_entry(child, &linkbus->devices, bus_list) + __pcie_aspm_config_one_dev(child, state); if (!(state & PCIE_LINK_STATE_L1)) - __pcie_aspm_config_one_dev(pdev, state); + __pcie_aspm_config_one_dev(parent, state); - link_state->aspm_enabled = state; + link->aspm_enabled = state; } static struct pcie_link_state *get_root_port_link(struct pcie_link_state *link) @@ -524,42 +503,38 @@ static struct pcie_link_state *get_root_port_link(struct pcie_link_state *link) return root_port_link; } -/* check the whole hierarchy, and configure each link in the hierarchy */ -static void __pcie_aspm_configure_link_state(struct pci_dev *pdev, - unsigned int state) +/* Check the whole hierarchy, and configure each link in the hierarchy */ +static void __pcie_aspm_configure_link_state(struct pcie_link_state *link, + u32 state) { - struct pcie_link_state *link_state = pdev->link_state; - struct pcie_link_state *root_port_link = get_root_port_link(link_state); - struct pcie_link_state *leaf; + struct pcie_link_state *leaf, *root = get_root_port_link(link); - state &= PCIE_LINK_STATE_L0S|PCIE_LINK_STATE_L1; + state &= (PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1); - /* check all links who have specific root port link */ + /* Check all links who have specific root port link */ list_for_each_entry(leaf, &link_list, sibling) { if (!list_empty(&leaf->children) || - get_root_port_link(leaf) != root_port_link) + get_root_port_link(leaf) != root) continue; - state = pcie_aspm_check_state(leaf->pdev, state); + state = pcie_aspm_check_state(leaf, state); } - /* check root port link too in case it hasn't children */ - state = pcie_aspm_check_state(root_port_link->pdev, state); - - if (link_state->aspm_enabled == state) + /* Check root port link too in case it hasn't children */ + state = pcie_aspm_check_state(root, state); + if (link->aspm_enabled == state) return; - /* - * we must change the hierarchy. See comments in + * We must change the hierarchy. See comments in * __pcie_aspm_config_link for the order **/ if (state & PCIE_LINK_STATE_L1) { list_for_each_entry(leaf, &link_list, sibling) { - if (get_root_port_link(leaf) == root_port_link) - __pcie_aspm_config_link(leaf->pdev, state); + if (get_root_port_link(leaf) == root) + __pcie_aspm_config_link(leaf, state); } } else { list_for_each_entry_reverse(leaf, &link_list, sibling) { - if (get_root_port_link(leaf) == root_port_link) - __pcie_aspm_config_link(leaf->pdev, state); + if (get_root_port_link(leaf) == root) + __pcie_aspm_config_link(leaf, state); } } } @@ -568,20 +543,20 @@ static void __pcie_aspm_configure_link_state(struct pci_dev *pdev, * pcie_aspm_configure_link_state: enable/disable PCI express link state * @pdev: the root port or switch downstream port */ -static void pcie_aspm_configure_link_state(struct pci_dev *pdev, - unsigned int state) +static void pcie_aspm_configure_link_state(struct pcie_link_state *link, + u32 state) { down_read(&pci_bus_sem); mutex_lock(&aspm_lock); - __pcie_aspm_configure_link_state(pdev, state); + __pcie_aspm_configure_link_state(link, state); mutex_unlock(&aspm_lock); up_read(&pci_bus_sem); } -static void free_link_state(struct pci_dev *pdev) +static void free_link_state(struct pcie_link_state *link) { - kfree(pdev->link_state); - pdev->link_state = NULL; + link->pdev->link_state = NULL; + kfree(link); } static int pcie_aspm_sanity_check(struct pci_dev *pdev) @@ -648,7 +623,6 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev) if (!link_state) goto unlock_out; - link_state->has_switch = pcie_aspm_downstream_has_switch(pdev); INIT_LIST_HEAD(&link_state->children); INIT_LIST_HEAD(&link_state->link); if (pdev->bus->self) {/* this is a switch */ @@ -662,12 +636,13 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev) list_add(&link_state->link, &parent_link_state->children); link_state->parent = parent_link_state; } - + link_state->pdev = pdev; + link_state->has_switch = pcie_aspm_downstream_has_switch(link_state); pdev->link_state = link_state; if (!blacklist) { - pcie_aspm_configure_common_clock(pdev); - pcie_aspm_cap_init(pdev); + pcie_aspm_configure_common_clock(link_state); + pcie_aspm_cap_init(link_state); } else { link_state->aspm_enabled = (PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1); @@ -676,7 +651,6 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev) link_state->aspm_support = 0; } - link_state->pdev = pdev; list_add(&link_state->sibling, &link_list); if (link_state->has_switch) { @@ -685,17 +659,18 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev) * initialization will config the whole hierarchy. but we must * make sure BIOS doesn't set unsupported link state **/ - state = pcie_aspm_check_state(pdev, link_state->aspm_default); - __pcie_aspm_config_link(pdev, state); + state = pcie_aspm_check_state(link_state, + link_state->aspm_default); + __pcie_aspm_config_link(link_state, state); } else - __pcie_aspm_configure_link_state(pdev, - policy_to_aspm_state(pdev)); + __pcie_aspm_configure_link_state(link_state, + policy_to_aspm_state(link_state)); - pcie_check_clock_pm(pdev, blacklist); + pcie_check_clock_pm(link_state, blacklist); unlock_out: if (error) - free_link_state(pdev); + free_link_state(link_state); mutex_unlock(&aspm_lock); out: up_read(&pci_bus_sem); @@ -728,7 +703,7 @@ void pcie_aspm_exit_link_state(struct pci_dev *pdev) list_del(&link_state->link); /* Clock PM is for endpoint device */ - free_link_state(parent); + free_link_state(link_state); out: mutex_unlock(&aspm_lock); up_read(&pci_bus_sem); @@ -748,7 +723,7 @@ void pcie_aspm_pm_state_change(struct pci_dev *pdev) * devices changed PM state, we should recheck if latency meets all * functions' requirement */ - pcie_aspm_configure_link_state(pdev, link_state->aspm_enabled); + pcie_aspm_configure_link_state(link_state, link_state->aspm_enabled); } /* @@ -775,9 +750,9 @@ void pci_disable_link_state(struct pci_dev *pdev, int state) if (state & PCIE_LINK_STATE_CLKPM) link_state->clkpm_capable = 0; - __pcie_aspm_configure_link_state(parent, link_state->aspm_enabled); + __pcie_aspm_configure_link_state(link_state, link_state->aspm_enabled); if (!link_state->clkpm_capable && link_state->clkpm_enabled) - pcie_set_clock_pm(parent, 0); + pcie_set_clock_pm(link_state, 0); mutex_unlock(&aspm_lock); up_read(&pci_bus_sem); } @@ -786,7 +761,6 @@ EXPORT_SYMBOL(pci_disable_link_state); static int pcie_aspm_set_policy(const char *val, struct kernel_param *kp) { int i; - struct pci_dev *pdev; struct pcie_link_state *link_state; for (i = 0; i < ARRAY_SIZE(policy_str); i++) @@ -801,12 +775,12 @@ static int pcie_aspm_set_policy(const char *val, struct kernel_param *kp) mutex_lock(&aspm_lock); aspm_policy = i; list_for_each_entry(link_state, &link_list, sibling) { - pdev = link_state->pdev; - __pcie_aspm_configure_link_state(pdev, - policy_to_aspm_state(pdev)); + __pcie_aspm_configure_link_state(link_state, + policy_to_aspm_state(link_state)); if (link_state->clkpm_capable && - link_state->clkpm_enabled != policy_to_clkpm_state(pdev)) - pcie_set_clock_pm(pdev, policy_to_clkpm_state(pdev)); + link_state->clkpm_enabled != policy_to_clkpm_state(link_state)) + pcie_set_clock_pm(link_state, + policy_to_clkpm_state(link_state)); } mutex_unlock(&aspm_lock); @@ -844,7 +818,7 @@ static ssize_t link_state_store(struct device *dev, const char *buf, size_t n) { - struct pci_dev *pci_device = to_pci_dev(dev); + struct pci_dev *pdev = to_pci_dev(dev); int state; if (n < 1) @@ -852,7 +826,7 @@ static ssize_t link_state_store(struct device *dev, state = buf[0]-'0'; if (state >= 0 && state <= 3) { /* setup link aspm state */ - pcie_aspm_configure_link_state(pci_device, state); + pcie_aspm_configure_link_state(pdev->link_state, state); return n; } @@ -883,7 +857,7 @@ static ssize_t clk_ctl_store(struct device *dev, down_read(&pci_bus_sem); mutex_lock(&aspm_lock); - pcie_set_clock_pm(pci_device, !!state); + pcie_set_clock_pm(pci_device->link_state, !!state); mutex_unlock(&aspm_lock); up_read(&pci_bus_sem); |