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Message-Id: <1343836477-7287-6-git-send-email-jiang.liu@huawei.com>
Date: Wed, 1 Aug 2012 23:54:10 +0800
From: Jiang Liu <liuj97@...il.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
Don Dutile <ddutile@...hat.com>
Cc: Jiang Liu <jiang.liu@...wei.com>, Yinghai Lu <yinghai@...nel.org>,
Taku Izumi <izumi.taku@...fujitsu.com>,
"Rafael J . Wysocki" <rjw@...k.pl>,
Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
Yijing Wang <wangyijing@...wei.com>,
linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
Jiang Liu <liuj97@...il.com>
Subject: [PATCH v3 05/32] PCI/core: use PCIe capabilities access functions to simplify implementation
From: Jiang Liu <jiang.liu@...wei.com>
Use PCIe capabilities access functions to simplify PCI core implementation.
Signed-off-by: Jiang Liu <liuj97@...il.com>
Signed-off-by: Yijing Wang <wangyijing@...wei.com>
---
drivers/pci/pci.c | 322 +++++++++++---------------------------------------
drivers/pci/probe.c | 18 +--
drivers/pci/quirks.c | 9 +-
3 files changed, 74 insertions(+), 275 deletions(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 28eb55b..d5a98cd 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -254,38 +254,6 @@ int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap)
}
/**
- * pci_pcie_cap2 - query for devices' PCI_CAP_ID_EXP v2 capability structure
- * @dev: PCI device to check
- *
- * Like pci_pcie_cap() but also checks that the PCIe capability version is
- * >= 2. Note that v1 capability structures could be sparse in that not
- * all register fields were required. v2 requires the entire structure to
- * be present size wise, while still allowing for non-implemented registers
- * to exist but they must be hardwired to 0.
- *
- * Due to the differences in the versions of capability structures, one
- * must be careful not to try and access non-existant registers that may
- * exist in early versions - v1 - of Express devices.
- *
- * Returns the offset of the PCIe capability structure as long as the
- * capability version is >= 2; otherwise 0 is returned.
- */
-static int pci_pcie_cap2(struct pci_dev *dev)
-{
- u16 flags;
- int pos;
-
- pos = pci_pcie_cap(dev);
- if (pos) {
- pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags);
- if ((flags & PCI_EXP_FLAGS_VERS) < 2)
- pos = 0;
- }
-
- return pos;
-}
-
-/**
* pci_find_ext_capability - Find an extended capability
* @dev: PCI device to query
* @cap: capability code
@@ -854,21 +822,6 @@ EXPORT_SYMBOL(pci_choose_state);
#define PCI_EXP_SAVE_REGS 7
-#define pcie_cap_has_devctl(type, flags) 1
-#define pcie_cap_has_lnkctl(type, flags) \
- ((flags & PCI_EXP_FLAGS_VERS) > 1 || \
- (type == PCI_EXP_TYPE_ROOT_PORT || \
- type == PCI_EXP_TYPE_ENDPOINT || \
- type == PCI_EXP_TYPE_LEG_END))
-#define pcie_cap_has_sltctl(type, flags) \
- ((flags & PCI_EXP_FLAGS_VERS) > 1 || \
- ((type == PCI_EXP_TYPE_ROOT_PORT) || \
- (type == PCI_EXP_TYPE_DOWNSTREAM && \
- (flags & PCI_EXP_FLAGS_SLOT))))
-#define pcie_cap_has_rtctl(type, flags) \
- ((flags & PCI_EXP_FLAGS_VERS) > 1 || \
- (type == PCI_EXP_TYPE_ROOT_PORT || \
- type == PCI_EXP_TYPE_RC_EC))
static struct pci_cap_saved_state *pci_find_saved_cap(
struct pci_dev *pci_dev, char cap)
@@ -885,76 +838,46 @@ static struct pci_cap_saved_state *pci_find_saved_cap(
static int pci_save_pcie_state(struct pci_dev *dev)
{
- int type, pos, i = 0;
+ int i = 0;
struct pci_cap_saved_state *save_state;
u16 *cap;
- u16 flags;
-
- pos = pci_pcie_cap(dev);
- if (!pos)
- return 0;
save_state = pci_find_saved_cap(dev, PCI_CAP_ID_EXP);
if (!save_state) {
dev_err(&dev->dev, "buffer not found in %s\n", __func__);
return -ENOMEM;
}
- cap = (u16 *)&save_state->cap.data[0];
-
- pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags);
- type = pci_pcie_type(dev);
- if (pcie_cap_has_devctl(type, flags))
- pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &cap[i++]);
- if (pcie_cap_has_lnkctl(type, flags))
- pci_read_config_word(dev, pos + PCI_EXP_LNKCTL, &cap[i++]);
- if (pcie_cap_has_sltctl(type, flags))
- pci_read_config_word(dev, pos + PCI_EXP_SLTCTL, &cap[i++]);
- if (pcie_cap_has_rtctl(type, flags))
- pci_read_config_word(dev, pos + PCI_EXP_RTCTL, &cap[i++]);
-
- pos = pci_pcie_cap2(dev);
- if (!pos)
- return 0;
+ cap = (u16 *)&save_state->cap.data[0];
+ pci_pcie_capability_read_word(dev, PCI_EXP_DEVCTL, &cap[i++]);
+ pci_pcie_capability_read_word(dev, PCI_EXP_LNKCTL, &cap[i++]);
+ pci_pcie_capability_read_word(dev, PCI_EXP_SLTCTL, &cap[i++]);
+ pci_pcie_capability_read_word(dev, PCI_EXP_RTCTL, &cap[i++]);
+ pci_pcie_capability_read_word(dev, PCI_EXP_DEVCTL2, &cap[i++]);
+ pci_pcie_capability_read_word(dev, PCI_EXP_LNKCTL2, &cap[i++]);
+ pci_pcie_capability_read_word(dev, PCI_EXP_SLTCTL2, &cap[i++]);
- pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &cap[i++]);
- pci_read_config_word(dev, pos + PCI_EXP_LNKCTL2, &cap[i++]);
- pci_read_config_word(dev, pos + PCI_EXP_SLTCTL2, &cap[i++]);
return 0;
}
static void pci_restore_pcie_state(struct pci_dev *dev)
{
- int i = 0, pos, type;
+ int i = 0;
struct pci_cap_saved_state *save_state;
u16 *cap;
- u16 flags;
save_state = pci_find_saved_cap(dev, PCI_CAP_ID_EXP);
- pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
- if (!save_state || pos <= 0)
- return;
- cap = (u16 *)&save_state->cap.data[0];
-
- pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags);
-
- type = pci_pcie_type(dev);
- if (pcie_cap_has_devctl(type, flags))
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, cap[i++]);
- if (pcie_cap_has_lnkctl(type, flags))
- pci_write_config_word(dev, pos + PCI_EXP_LNKCTL, cap[i++]);
- if (pcie_cap_has_sltctl(type, flags))
- pci_write_config_word(dev, pos + PCI_EXP_SLTCTL, cap[i++]);
- if (pcie_cap_has_rtctl(type, flags))
- pci_write_config_word(dev, pos + PCI_EXP_RTCTL, cap[i++]);
-
- pos = pci_pcie_cap2(dev);
- if (!pos)
+ if (!save_state)
return;
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, cap[i++]);
- pci_write_config_word(dev, pos + PCI_EXP_LNKCTL2, cap[i++]);
- pci_write_config_word(dev, pos + PCI_EXP_SLTCTL2, cap[i++]);
+ cap = (u16 *)&save_state->cap.data[0];
+ pci_pcie_capability_write_word(dev, PCI_EXP_DEVCTL, cap[i++]);
+ pci_pcie_capability_write_word(dev, PCI_EXP_LNKCTL, cap[i++]);
+ pci_pcie_capability_write_word(dev, PCI_EXP_SLTCTL, cap[i++]);
+ pci_pcie_capability_write_word(dev, PCI_EXP_RTCTL, cap[i++]);
+ pci_pcie_capability_write_word(dev, PCI_EXP_DEVCTL2, cap[i++]);
+ pci_pcie_capability_write_word(dev, PCI_EXP_LNKCTL2, cap[i++]);
+ pci_pcie_capability_write_word(dev, PCI_EXP_SLTCTL2, cap[i++]);
}
@@ -2068,35 +1991,25 @@ void pci_free_cap_save_buffers(struct pci_dev *dev)
*/
void pci_enable_ari(struct pci_dev *dev)
{
- int pos;
u32 cap;
- u16 ctrl;
struct pci_dev *bridge;
- if (pcie_ari_disabled || !pci_is_pcie(dev) || dev->devfn)
+ if (pcie_ari_disabled || dev->devfn)
return;
- pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ARI);
- if (!pos)
+ if (!pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ARI))
return;
bridge = dev->bus->self;
if (!bridge)
return;
- /* ARI is a PCIe cap v2 feature */
- pos = pci_pcie_cap2(bridge);
- if (!pos)
- return;
-
- pci_read_config_dword(bridge, pos + PCI_EXP_DEVCAP2, &cap);
+ pci_pcie_capability_read_dword(bridge, PCI_EXP_DEVCAP2, &cap);
if (!(cap & PCI_EXP_DEVCAP2_ARI))
return;
- pci_read_config_word(bridge, pos + PCI_EXP_DEVCTL2, &ctrl);
- ctrl |= PCI_EXP_DEVCTL2_ARI;
- pci_write_config_word(bridge, pos + PCI_EXP_DEVCTL2, ctrl);
-
+ pci_pcie_capability_change_word(bridge, PCI_EXP_DEVCTL2,
+ PCI_EXP_DEVCTL2_ARI, 0);
bridge->ari_enabled = 1;
}
@@ -2111,20 +2024,14 @@ void pci_enable_ari(struct pci_dev *dev)
*/
void pci_enable_ido(struct pci_dev *dev, unsigned long type)
{
- int pos;
- u16 ctrl;
+ u16 ctrl = 0;
- /* ID-based Ordering is a PCIe cap v2 feature */
- pos = pci_pcie_cap2(dev);
- if (!pos)
- return;
-
- pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl);
if (type & PCI_EXP_IDO_REQUEST)
ctrl |= PCI_EXP_IDO_REQ_EN;
if (type & PCI_EXP_IDO_COMPLETION)
ctrl |= PCI_EXP_IDO_CMP_EN;
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl);
+ if (ctrl)
+ pci_pcie_capability_change_word(dev, PCI_EXP_DEVCTL2, ctrl, 0);
}
EXPORT_SYMBOL(pci_enable_ido);
@@ -2135,20 +2042,14 @@ EXPORT_SYMBOL(pci_enable_ido);
*/
void pci_disable_ido(struct pci_dev *dev, unsigned long type)
{
- int pos;
- u16 ctrl;
-
- /* ID-based Ordering is a PCIe cap v2 feature */
- pos = pci_pcie_cap2(dev);
- if (!pos)
- return;
+ u16 ctrl = 0;
- pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl);
if (type & PCI_EXP_IDO_REQUEST)
- ctrl &= ~PCI_EXP_IDO_REQ_EN;
+ ctrl |= PCI_EXP_IDO_REQ_EN;
if (type & PCI_EXP_IDO_COMPLETION)
- ctrl &= ~PCI_EXP_IDO_CMP_EN;
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl);
+ ctrl |= PCI_EXP_IDO_CMP_EN;
+ if (ctrl)
+ pci_pcie_capability_change_word(dev, PCI_EXP_DEVCTL2, 0, ctrl);
}
EXPORT_SYMBOL(pci_disable_ido);
@@ -2173,17 +2074,11 @@ EXPORT_SYMBOL(pci_disable_ido);
*/
int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type type)
{
- int pos;
u32 cap;
u16 ctrl;
int ret;
- /* OBFF is a PCIe cap v2 feature */
- pos = pci_pcie_cap2(dev);
- if (!pos)
- return -ENOTSUPP;
-
- pci_read_config_dword(dev, pos + PCI_EXP_DEVCAP2, &cap);
+ pci_pcie_capability_read_dword(dev, PCI_EXP_DEVCAP2, &cap);
if (!(cap & PCI_EXP_OBFF_MASK))
return -ENOTSUPP; /* no OBFF support at all */
@@ -2194,7 +2089,7 @@ int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type type)
return ret;
}
- pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl);
+ pci_pcie_capability_read_word(dev, PCI_EXP_DEVCTL2, &ctrl);
if (cap & PCI_EXP_OBFF_WAKE)
ctrl |= PCI_EXP_OBFF_WAKE_EN;
else {
@@ -2212,7 +2107,7 @@ int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type type)
return -ENOTSUPP;
}
}
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl);
+ pci_pcie_capability_write_word(dev, PCI_EXP_DEVCTL2, ctrl);
return 0;
}
@@ -2226,17 +2121,8 @@ EXPORT_SYMBOL(pci_enable_obff);
*/
void pci_disable_obff(struct pci_dev *dev)
{
- int pos;
- u16 ctrl;
-
- /* OBFF is a PCIe cap v2 feature */
- pos = pci_pcie_cap2(dev);
- if (!pos)
- return;
-
- pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl);
- ctrl &= ~PCI_EXP_OBFF_WAKE_EN;
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl);
+ pci_pcie_capability_change_word(dev, PCI_EXP_DEVCTL2,
+ 0, PCI_EXP_OBFF_WAKE_EN);
}
EXPORT_SYMBOL(pci_disable_obff);
@@ -2249,15 +2135,9 @@ EXPORT_SYMBOL(pci_disable_obff);
*/
static bool pci_ltr_supported(struct pci_dev *dev)
{
- int pos;
u32 cap;
- /* LTR is a PCIe cap v2 feature */
- pos = pci_pcie_cap2(dev);
- if (!pos)
- return false;
-
- pci_read_config_dword(dev, pos + PCI_EXP_DEVCAP2, &cap);
+ pci_pcie_capability_read_dword(dev, PCI_EXP_DEVCAP2, &cap);
return cap & PCI_EXP_DEVCAP2_LTR;
}
@@ -2274,22 +2154,15 @@ static bool pci_ltr_supported(struct pci_dev *dev)
*/
int pci_enable_ltr(struct pci_dev *dev)
{
- int pos;
- u16 ctrl;
int ret;
- if (!pci_ltr_supported(dev))
- return -ENOTSUPP;
-
- /* LTR is a PCIe cap v2 feature */
- pos = pci_pcie_cap2(dev);
- if (!pos)
- return -ENOTSUPP;
-
/* Only primary function can enable/disable LTR */
if (PCI_FUNC(dev->devfn) != 0)
return -EINVAL;
+ if (!pci_ltr_supported(dev))
+ return -ENOTSUPP;
+
/* Enable upstream ports first */
if (dev->bus->self) {
ret = pci_enable_ltr(dev->bus->self);
@@ -2297,11 +2170,8 @@ int pci_enable_ltr(struct pci_dev *dev)
return ret;
}
- pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl);
- ctrl |= PCI_EXP_LTR_EN;
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl);
-
- return 0;
+ return pci_pcie_capability_change_word(dev, PCI_EXP_DEVCTL2,
+ PCI_EXP_LTR_EN, 0);
}
EXPORT_SYMBOL(pci_enable_ltr);
@@ -2311,24 +2181,15 @@ EXPORT_SYMBOL(pci_enable_ltr);
*/
void pci_disable_ltr(struct pci_dev *dev)
{
- int pos;
- u16 ctrl;
-
- if (!pci_ltr_supported(dev))
- return;
-
- /* LTR is a PCIe cap v2 feature */
- pos = pci_pcie_cap2(dev);
- if (!pos)
- return;
-
/* Only primary function can enable/disable LTR */
if (PCI_FUNC(dev->devfn) != 0)
return;
- pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl);
- ctrl &= ~PCI_EXP_LTR_EN;
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl);
+ if (!pci_ltr_supported(dev))
+ return;
+
+ pci_pcie_capability_change_word(dev, PCI_EXP_DEVCTL2,
+ 0, PCI_EXP_LTR_EN);
}
EXPORT_SYMBOL(pci_disable_ltr);
@@ -2411,9 +2272,6 @@ void pci_enable_acs(struct pci_dev *dev)
if (!pci_acs_enable)
return;
- if (!pci_is_pcie(dev))
- return;
-
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS);
if (!pos)
return;
@@ -3178,15 +3036,10 @@ EXPORT_SYMBOL(pci_set_dma_seg_boundary);
static int pcie_flr(struct pci_dev *dev, int probe)
{
int i;
- int pos;
u32 cap;
- u16 status, control;
-
- pos = pci_pcie_cap(dev);
- if (!pos)
- return -ENOTTY;
+ u16 status;
- pci_read_config_dword(dev, pos + PCI_EXP_DEVCAP, &cap);
+ pci_pcie_capability_read_dword(dev, PCI_EXP_DEVCAP, &cap);
if (!(cap & PCI_EXP_DEVCAP_FLR))
return -ENOTTY;
@@ -3198,7 +3051,7 @@ static int pcie_flr(struct pci_dev *dev, int probe)
if (i)
msleep((1 << (i - 1)) * 100);
- pci_read_config_word(dev, pos + PCI_EXP_DEVSTA, &status);
+ pci_pcie_capability_read_word(dev, PCI_EXP_DEVSTA, &status);
if (!(status & PCI_EXP_DEVSTA_TRPND))
goto clear;
}
@@ -3207,9 +3060,8 @@ static int pcie_flr(struct pci_dev *dev, int probe)
"proceeding with reset anyway\n");
clear:
- pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &control);
- control |= PCI_EXP_DEVCTL_BCR_FLR;
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, control);
+ pci_pcie_capability_change_word(dev, PCI_EXP_DEVCTL,
+ PCI_EXP_DEVCTL_BCR_FLR, 0);
msleep(100);
@@ -3577,18 +3429,11 @@ EXPORT_SYMBOL(pcix_set_mmrbc);
*/
int pcie_get_readrq(struct pci_dev *dev)
{
- int ret, cap;
u16 ctl;
- cap = pci_pcie_cap(dev);
- if (!cap)
- return -EINVAL;
-
- ret = pci_read_config_word(dev, cap + PCI_EXP_DEVCTL, &ctl);
- if (!ret)
- ret = 128 << ((ctl & PCI_EXP_DEVCTL_READRQ) >> 12);
+ pci_pcie_capability_read_word(dev, PCI_EXP_DEVCTL, &ctl);
- return ret;
+ return 128 << ((ctl & PCI_EXP_DEVCTL_READRQ) >> 12);
}
EXPORT_SYMBOL(pcie_get_readrq);
@@ -3602,19 +3447,11 @@ EXPORT_SYMBOL(pcie_get_readrq);
*/
int pcie_set_readrq(struct pci_dev *dev, int rq)
{
- int cap, err = -EINVAL;
- u16 ctl, v;
+ u16 v;
if (rq < 128 || rq > 4096 || !is_power_of_2(rq))
- goto out;
-
- cap = pci_pcie_cap(dev);
- if (!cap)
- goto out;
+ return -EINVAL;
- err = pci_read_config_word(dev, cap + PCI_EXP_DEVCTL, &ctl);
- if (err)
- goto out;
/*
* If using the "performance" PCIe config, we clamp the
* read rq size to the max packet size to prevent the
@@ -3632,14 +3469,8 @@ int pcie_set_readrq(struct pci_dev *dev, int rq)
v = (ffs(rq) - 8) << 12;
- if ((ctl & PCI_EXP_DEVCTL_READRQ) != v) {
- ctl &= ~PCI_EXP_DEVCTL_READRQ;
- ctl |= v;
- err = pci_write_config_word(dev, cap + PCI_EXP_DEVCTL, ctl);
- }
-
-out:
- return err;
+ return pci_pcie_capability_change_word(dev, PCI_EXP_DEVCTL,
+ v, PCI_EXP_DEVCTL_READRQ);
}
EXPORT_SYMBOL(pcie_set_readrq);
@@ -3652,18 +3483,11 @@ EXPORT_SYMBOL(pcie_set_readrq);
*/
int pcie_get_mps(struct pci_dev *dev)
{
- int ret, cap;
u16 ctl;
- cap = pci_pcie_cap(dev);
- if (!cap)
- return -EINVAL;
-
- ret = pci_read_config_word(dev, cap + PCI_EXP_DEVCTL, &ctl);
- if (!ret)
- ret = 128 << ((ctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5);
+ pci_pcie_capability_read_word(dev, PCI_EXP_DEVCTL, &ctl);
- return ret;
+ return 128 << ((ctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5);
}
/**
@@ -3676,32 +3500,18 @@ int pcie_get_mps(struct pci_dev *dev)
*/
int pcie_set_mps(struct pci_dev *dev, int mps)
{
- int cap, err = -EINVAL;
- u16 ctl, v;
+ u16 v;
if (mps < 128 || mps > 4096 || !is_power_of_2(mps))
- goto out;
+ return -EINVAL;
v = ffs(mps) - 8;
if (v > dev->pcie_mpss)
- goto out;
+ return -EINVAL;
v <<= 5;
- cap = pci_pcie_cap(dev);
- if (!cap)
- goto out;
-
- err = pci_read_config_word(dev, cap + PCI_EXP_DEVCTL, &ctl);
- if (err)
- goto out;
-
- if ((ctl & PCI_EXP_DEVCTL_PAYLOAD) != v) {
- ctl &= ~PCI_EXP_DEVCTL_PAYLOAD;
- ctl |= v;
- err = pci_write_config_word(dev, cap + PCI_EXP_DEVCTL, ctl);
- }
-out:
- return err;
+ return pci_pcie_capability_change_word(dev, PCI_EXP_DEVCTL,
+ v, PCI_EXP_DEVCTL_PAYLOAD);
}
/**
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 8bcc985..6a2eac8 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -603,10 +603,11 @@ static void pci_set_bus_speed(struct pci_bus *bus)
u32 linkcap;
u16 linksta;
- pci_read_config_dword(bridge, pos + PCI_EXP_LNKCAP, &linkcap);
+ pci_pcie_capability_read_dword(bridge, PCI_EXP_LNKCAP,
+ &linkcap);
bus->max_bus_speed = pcie_link_speed[linkcap & 0xf];
- pci_read_config_word(bridge, pos + PCI_EXP_LNKSTA, &linksta);
+ pci_pcie_capability_read_word(bridge, PCI_EXP_LNKSTA, &linksta);
pcie_update_link_speed(bus, linksta);
}
}
@@ -936,17 +937,9 @@ void set_pcie_port_type(struct pci_dev *pdev)
void set_pcie_hotplug_bridge(struct pci_dev *pdev)
{
- int pos;
- u16 reg16;
u32 reg32;
- pos = pci_pcie_cap(pdev);
- if (!pos)
- return;
- pci_read_config_word(pdev, pos + PCI_EXP_FLAGS, ®16);
- if (!(reg16 & PCI_EXP_FLAGS_SLOT))
- return;
- pci_read_config_dword(pdev, pos + PCI_EXP_SLTCAP, ®32);
+ pci_pcie_capability_read_dword(pdev, PCI_EXP_SLTCAP, ®32);
if (reg32 & PCI_EXP_SLTCAP_HPC)
pdev->is_hotplug_bridge = 1;
}
@@ -1160,8 +1153,7 @@ int pci_cfg_space_size(struct pci_dev *dev)
if (class == PCI_CLASS_BRIDGE_HOST)
return pci_cfg_space_size_ext(dev);
- pos = pci_pcie_cap(dev);
- if (!pos) {
+ if (!pci_is_pcie(dev)) {
pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);
if (!pos)
goto fail;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 003f356..fde4ff3 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3081,17 +3081,14 @@ static int reset_intel_generic_dev(struct pci_dev *dev, int probe)
static int reset_intel_82599_sfp_virtfn(struct pci_dev *dev, int probe)
{
- int pos;
-
- pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
- if (!pos)
+ if (!pci_pcie_capability_reg_implemented(dev, PCI_EXP_DEVCTL))
return -ENOTTY;
if (probe)
return 0;
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL,
- PCI_EXP_DEVCTL_BCR_FLR);
+ pci_pcie_capability_write_word(dev, PCI_EXP_DEVCTL,
+ PCI_EXP_DEVCTL_BCR_FLR);
msleep(100);
return 0;
--
1.7.9.5
--
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