From: Xiaowei Bao <xiaowei.bao@nxp.com>
To: robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org,
leoyang.li@nxp.com, kishon@ti.com, lorenzo.pieralisi@arm.com,
minghuan.Lian@nxp.com, mingkai.hu@nxp.com, roy.zang@nxp.com,
jingoohan1@gmail.com, gustavo.pimentel@synopsys.com,
linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linuxppc-dev@lists.ozlabs.org
Cc: arnd@arndb.de, gregkh@linuxfoundation.org, zhiqiang.hou@nxp.com,
Xiaowei Bao <xiaowei.bao@nxp.com>
Subject: [PATCH v3 04/11] PCI: designware-ep: Modify MSI and MSIX CAP way of finding
Date: Mon, 2 Sep 2019 11:17:09 +0800 [thread overview]
Message-ID: <20190902031716.43195-5-xiaowei.bao@nxp.com> (raw)
In-Reply-To: <20190902031716.43195-1-xiaowei.bao@nxp.com>
Each PF of EP device should have it's own MSI or MSIX capabitily
struct, so create a dw_pcie_ep_func struct and remover the msi_cap
and msix_cap to this struce, and manage the PFs with a list.
Signed-off-by: Xiaowei Bao <xiaowei.bao@nxp.com>
---
v1:
- This is a new patch, to fix the issue of MSI and MSIX CAP way of
finding.
v2:
- No change.
v3:
- No change.
drivers/pci/controller/dwc/pcie-designware-ep.c | 135 +++++++++++++++++++++---
drivers/pci/controller/dwc/pcie-designware.h | 18 +++-
2 files changed, 134 insertions(+), 19 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index c3bc7bd..144eb12 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -19,6 +19,19 @@ void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
pci_epc_linkup(epc);
}
+struct dw_pcie_ep_func *
+dw_pcie_ep_get_func_from_ep(struct dw_pcie_ep *ep, u8 func_no)
+{
+ struct dw_pcie_ep_func *ep_func;
+
+ list_for_each_entry(ep_func, &ep->func_list, list) {
+ if (ep_func->func_no == func_no)
+ return ep_func;
+ }
+
+ return NULL;
+}
+
static unsigned int dw_pcie_ep_func_select(struct dw_pcie_ep *ep, u8 func_no)
{
unsigned int func_offset = 0;
@@ -59,6 +72,47 @@ void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
__dw_pcie_ep_reset_bar(pci, func_no, bar, 0);
}
+static u8 __dw_pcie_ep_find_next_cap(struct dw_pcie_ep *ep, u8 func_no,
+ u8 cap_ptr, u8 cap)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ unsigned int func_offset = 0;
+ u8 cap_id, next_cap_ptr;
+ u16 reg;
+
+ if (!cap_ptr)
+ return 0;
+
+ func_offset = dw_pcie_ep_func_select(ep, func_no);
+
+ reg = dw_pcie_readw_dbi(pci, func_offset + cap_ptr);
+ cap_id = (reg & 0x00ff);
+
+ if (cap_id > PCI_CAP_ID_MAX)
+ return 0;
+
+ if (cap_id == cap)
+ return cap_ptr;
+
+ next_cap_ptr = (reg & 0xff00) >> 8;
+ return __dw_pcie_ep_find_next_cap(ep, func_no, next_cap_ptr, cap);
+}
+
+static u8 dw_pcie_ep_find_capability(struct dw_pcie_ep *ep, u8 func_no, u8 cap)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ unsigned int func_offset = 0;
+ u8 next_cap_ptr;
+ u16 reg;
+
+ func_offset = dw_pcie_ep_func_select(ep, func_no);
+
+ reg = dw_pcie_readw_dbi(pci, func_offset + PCI_CAPABILITY_LIST);
+ next_cap_ptr = (reg & 0x00ff);
+
+ return __dw_pcie_ep_find_next_cap(ep, func_no, next_cap_ptr, cap);
+}
+
static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr)
{
@@ -246,13 +300,18 @@ static int dw_pcie_ep_get_msi(struct pci_epc *epc, u8 func_no)
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
u32 val, reg;
unsigned int func_offset = 0;
+ struct dw_pcie_ep_func *ep_func;
- if (!ep->msi_cap)
+ ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no);
+ if (!ep_func)
+ return -EINVAL;
+
+ if (!ep_func->msi_cap)
return -EINVAL;
func_offset = dw_pcie_ep_func_select(ep, func_no);
- reg = ep->msi_cap + func_offset + PCI_MSI_FLAGS;
+ reg = ep_func->msi_cap + func_offset + PCI_MSI_FLAGS;
val = dw_pcie_readw_dbi(pci, reg);
if (!(val & PCI_MSI_FLAGS_ENABLE))
return -EINVAL;
@@ -268,13 +327,18 @@ static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts)
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
u32 val, reg;
unsigned int func_offset = 0;
+ struct dw_pcie_ep_func *ep_func;
+
+ ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no);
+ if (!ep_func)
+ return -EINVAL;
- if (!ep->msi_cap)
+ if (!ep_func->msi_cap)
return -EINVAL;
func_offset = dw_pcie_ep_func_select(ep, func_no);
- reg = ep->msi_cap + func_offset + PCI_MSI_FLAGS;
+ reg = ep_func->msi_cap + func_offset + PCI_MSI_FLAGS;
val = dw_pcie_readw_dbi(pci, reg);
val &= ~PCI_MSI_FLAGS_QMASK;
val |= (interrupts << 1) & PCI_MSI_FLAGS_QMASK;
@@ -291,13 +355,18 @@ static int dw_pcie_ep_get_msix(struct pci_epc *epc, u8 func_no)
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
u32 val, reg;
unsigned int func_offset = 0;
+ struct dw_pcie_ep_func *ep_func;
+
+ ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no);
+ if (!ep_func)
+ return -EINVAL;
- if (!ep->msix_cap)
+ if (!ep_func->msix_cap)
return -EINVAL;
func_offset = dw_pcie_ep_func_select(ep, func_no);
- reg = ep->msix_cap + func_offset + PCI_MSIX_FLAGS;
+ reg = ep_func->msix_cap + func_offset + PCI_MSIX_FLAGS;
val = dw_pcie_readw_dbi(pci, reg);
if (!(val & PCI_MSIX_FLAGS_ENABLE))
return -EINVAL;
@@ -313,13 +382,18 @@ static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts)
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
u32 val, reg;
unsigned int func_offset = 0;
+ struct dw_pcie_ep_func *ep_func;
- if (!ep->msix_cap)
+ ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no);
+ if (!ep_func)
+ return -EINVAL;
+
+ if (!ep_func->msix_cap)
return -EINVAL;
func_offset = dw_pcie_ep_func_select(ep, func_no);
- reg = ep->msix_cap + func_offset + PCI_MSIX_FLAGS;
+ reg = ep_func->msix_cap + func_offset + PCI_MSIX_FLAGS;
val = dw_pcie_readw_dbi(pci, reg);
val &= ~PCI_MSIX_FLAGS_QSIZE;
val |= interrupts;
@@ -404,6 +478,7 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
u8 interrupt_num)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ struct dw_pcie_ep_func *ep_func;
struct pci_epc *epc = ep->epc;
unsigned int aligned_offset;
unsigned int func_offset = 0;
@@ -413,25 +488,29 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
bool has_upper;
int ret;
- if (!ep->msi_cap)
+ ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no);
+ if (!ep_func)
+ return -EINVAL;
+
+ if (!ep_func->msi_cap)
return -EINVAL;
func_offset = dw_pcie_ep_func_select(ep, func_no);
/* Raise MSI per the PCI Local Bus Specification Revision 3.0, 6.8.1. */
- reg = ep->msi_cap + func_offset + PCI_MSI_FLAGS;
+ reg = ep_func->msi_cap + func_offset + PCI_MSI_FLAGS;
msg_ctrl = dw_pcie_readw_dbi(pci, reg);
has_upper = !!(msg_ctrl & PCI_MSI_FLAGS_64BIT);
- reg = ep->msi_cap + func_offset + PCI_MSI_ADDRESS_LO;
+ reg = ep_func->msi_cap + func_offset + PCI_MSI_ADDRESS_LO;
msg_addr_lower = dw_pcie_readl_dbi(pci, reg);
if (has_upper) {
- reg = ep->msi_cap + func_offset + PCI_MSI_ADDRESS_HI;
+ reg = ep_func->msi_cap + func_offset + PCI_MSI_ADDRESS_HI;
msg_addr_upper = dw_pcie_readl_dbi(pci, reg);
- reg = ep->msi_cap + func_offset + PCI_MSI_DATA_64;
+ reg = ep_func->msi_cap + func_offset + PCI_MSI_DATA_64;
msg_data = dw_pcie_readw_dbi(pci, reg);
} else {
msg_addr_upper = 0;
- reg = ep->msi_cap + func_offset + PCI_MSI_DATA_32;
+ reg = ep_func->msi_cap + func_offset + PCI_MSI_DATA_32;
msg_data = dw_pcie_readw_dbi(pci, reg);
}
aligned_offset = msg_addr_lower & (epc->mem->page_size - 1);
@@ -467,6 +546,7 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
u16 interrupt_num)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ struct dw_pcie_ep_func *ep_func;
struct pci_epc *epc = ep->epc;
u16 tbl_offset, bir;
unsigned int func_offset = 0;
@@ -477,9 +557,16 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
void __iomem *msix_tbl;
int ret;
+ ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no);
+ if (!ep_func)
+ return -EINVAL;
+
+ if (!ep_func->msix_cap)
+ return -EINVAL;
+
func_offset = dw_pcie_ep_func_select(ep, func_no);
- reg = ep->msix_cap + func_offset + PCI_MSIX_TABLE;
+ reg = ep_func->msix_cap + func_offset + PCI_MSIX_TABLE;
tbl_offset = dw_pcie_readl_dbi(pci, reg);
bir = (tbl_offset & PCI_MSIX_TABLE_BIR);
tbl_offset &= PCI_MSIX_TABLE_OFFSET;
@@ -558,6 +645,7 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
int i;
int ret;
u32 reg;
+ u8 func_no;
void *addr;
unsigned int nbars;
unsigned int offset;
@@ -565,6 +653,9 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
struct device *dev = pci->dev;
struct device_node *np = dev->of_node;
+ struct dw_pcie_ep_func *ep_func;
+
+ INIT_LIST_HEAD(&ep->func_list);
if (!pci->dbi_base || !pci->dbi_base2) {
dev_err(dev, "dbi_base/dbi_base2 is not populated\n");
@@ -624,9 +715,19 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
if (ret < 0)
epc->max_functions = 1;
- ep->msi_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSI);
+ for (func_no = 0; func_no < epc->max_functions; func_no++) {
+ ep_func = devm_kzalloc(dev, sizeof(*ep_func), GFP_KERNEL);
+ if (!ep_func)
+ return -ENOMEM;
- ep->msix_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSIX);
+ ep_func->func_no = func_no;
+ ep_func->msi_cap = dw_pcie_ep_find_capability(ep, func_no,
+ PCI_CAP_ID_MSI);
+ ep_func->msix_cap = dw_pcie_ep_find_capability(ep, func_no,
+ PCI_CAP_ID_MSIX);
+
+ list_add_tail(&ep_func->list, &ep->func_list);
+ }
if (ep->ops->ep_init)
ep->ops->ep_init(ep);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 56789be..a57743c 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -221,8 +221,16 @@ struct dw_pcie_ep_ops {
unsigned int (*func_conf_select)(struct dw_pcie_ep *ep, u8 func_no);
};
+struct dw_pcie_ep_func {
+ struct list_head list;
+ u8 func_no;
+ u8 msi_cap; /* MSI capability offset */
+ u8 msix_cap; /* MSI-X capability offset */
+};
+
struct dw_pcie_ep {
struct pci_epc *epc;
+ struct list_head func_list;
const struct dw_pcie_ep_ops *ops;
phys_addr_t phys_base;
size_t addr_size;
@@ -235,8 +243,6 @@ struct dw_pcie_ep {
u32 num_ob_windows;
void __iomem *msi_mem;
phys_addr_t msi_mem_phys;
- u8 msi_cap; /* MSI capability offset */
- u8 msix_cap; /* MSI-X capability offset */
};
struct dw_pcie_ops {
@@ -425,6 +431,8 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep, u8 func_no,
u16 interrupt_num);
void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar);
+struct dw_pcie_ep_func *
+dw_pcie_ep_get_func_from_ep(struct dw_pcie_ep *ep, u8 func_no);
#else
static inline void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
{
@@ -466,5 +474,11 @@ static inline int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep,
static inline void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
{
}
+
+struct dw_pcie_ep_func *
+dw_pcie_ep_get_func_from_ep(struct dw_pcie_ep *ep, u8 func_no)
+{
+ return NULL;
+}
#endif
#endif /* _PCIE_DESIGNWARE_H */
--
2.9.5
next prev parent reply other threads:[~2019-09-02 3:27 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-02 3:17 [PATCH v3 00/11] *** SUBJECT HERE *** Xiaowei Bao
2019-09-02 3:17 ` [PATCH v3 01/11] PCI: designware-ep: Add multiple PFs support for DWC Xiaowei Bao
2019-09-02 16:26 ` Andrew Murray
2019-09-03 3:43 ` Xiaowei Bao
2019-09-26 10:29 ` Andrew Murray
2019-09-26 13:38 ` Gustavo Pimentel
2019-09-02 3:17 ` [PATCH v3 02/11] PCI: designware-ep: Add the doorbell mode of MSI-X in EP mode Xiaowei Bao
2019-09-02 3:17 ` [PATCH v3 03/11] PCI: designware-ep: Move the function of getting MSI capability forward Xiaowei Bao
2019-09-02 3:17 ` Xiaowei Bao [this message]
2019-09-02 15:07 ` [PATCH v3 04/11] PCI: designware-ep: Modify MSI and MSIX CAP way of finding Andrew Murray
2019-09-03 2:33 ` Xiaowei Bao
2019-09-02 3:17 ` [PATCH v3 05/11] dt-bindings: pci: layerscape-pci: add compatible strings for ls1088a and ls2088a Xiaowei Bao
2019-09-02 12:31 ` Andrew Murray
2019-09-03 1:33 ` Xiaowei Bao
2019-09-02 3:17 ` [PATCH v3 06/11] PCI: layerscape: Fix some format issue of the code Xiaowei Bao
2019-09-02 3:17 ` [PATCH v3 07/11] PCI: layerscape: Modify the way of getting capability with different PEX Xiaowei Bao
2019-09-02 13:37 ` Andrew Murray
2019-09-03 2:13 ` Xiaowei Bao
2019-09-02 3:17 ` [PATCH v3 08/11] PCI: layerscape: Modify the MSIX to the doorbell mode Xiaowei Bao
2019-09-02 12:01 ` Andrew Murray
2019-09-12 11:24 ` Gustavo Pimentel
2019-09-14 6:37 ` Xiaowei Bao
2019-09-16 8:54 ` Gustavo Pimentel
2019-09-02 3:17 ` [PATCH v3 09/11] PCI: layerscape: Add EP mode support for ls1088a and ls2088a Xiaowei Bao
2019-09-02 12:46 ` Andrew Murray
2019-09-03 1:47 ` Xiaowei Bao
2019-09-12 12:49 ` Andrew Murray
2019-09-14 4:10 ` Xiaowei Bao
2019-09-16 14:37 ` Andrew Murray
2019-09-18 3:17 ` Xiaowei Bao
2019-09-02 3:17 ` [PATCH v3 10/11] arm64: dts: layerscape: Add PCIe EP node for ls1088a Xiaowei Bao
2019-09-02 13:06 ` Andrew Murray
2019-09-03 2:01 ` Xiaowei Bao
2019-09-12 13:01 ` Andrew Murray
2019-09-14 4:15 ` Xiaowei Bao
2019-09-02 3:17 ` [PATCH v3 11/11] misc: pci_endpoint_test: Add LS1088a in pci_device_id table Xiaowei Bao
2019-09-02 12:54 ` Andrew Murray
2019-09-03 1:52 ` Xiaowei Bao
2019-09-12 12:59 ` Andrew Murray
2019-09-14 4:13 ` Xiaowei Bao
2019-09-02 3:52 ` [PATCH v3 00/11] *** SUBJECT HERE *** Z.q. Hou
2019-09-02 3:54 ` Xiaowei Bao
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