From: Frank Li <Frank.Li@nxp.com>
To: "Bjorn Helgaas" <bhelgaas@google.com>,
"Jingoo Han" <jingoohan1@gmail.com>,
"Gustavo Pimentel" <gustavo.pimentel@synopsys.com>,
"Manivannan Sadhasivam" <manivannan.sadhasivam@linaro.org>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
"Conor Dooley" <conor+dt@kernel.org>,
imx@lists.linux.dev
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, Frank Li <Frank.Li@nxp.com>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
Serge Semin <fancer.lancer@gmail.com>
Subject: [PATCH v8 3/5] PCI: dwc: Add outbound MSG TLPs support
Date: Thu, 18 Apr 2024 12:04:26 -0400 [thread overview]
Message-ID: <20240418-pme_msg-v8-3-a54265c39742@nxp.com> (raw)
In-Reply-To: <20240418-pme_msg-v8-0-a54265c39742@nxp.com>
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Add "code" and "routing" into struct dw_pcie_ob_atu_cfg for triggering
INTx IRQs by iATU in the PCIe endpoint mode in near the future.
PCIE_ATU_INHIBIT_PAYLOAD is set to issue TLP type of Msg instead of
MsgD. So, this implementation supports the data-less messages only
for now.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
drivers/pci/controller/dwc/pcie-designware.c | 9 +++++++--
drivers/pci/controller/dwc/pcie-designware.h | 4 ++++
2 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index df2575ec5f44c..ba909fade9db1 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -499,7 +499,7 @@ int dw_pcie_prog_outbound_atu(struct dw_pcie *pci,
dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_UPPER_TARGET,
upper_32_bits(atu->pci_addr));
- val = atu->type | PCIE_ATU_FUNC_NUM(atu->func_no);
+ val = atu->type | atu->routing | PCIE_ATU_FUNC_NUM(atu->func_no);
if (upper_32_bits(limit_addr) > upper_32_bits(cpu_addr) &&
dw_pcie_ver_is_ge(pci, 460A))
val |= PCIE_ATU_INCREASE_REGION_SIZE;
@@ -507,7 +507,12 @@ int dw_pcie_prog_outbound_atu(struct dw_pcie *pci,
val = dw_pcie_enable_ecrc(val);
dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL1, val);
- dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL2, PCIE_ATU_ENABLE);
+ val = PCIE_ATU_ENABLE;
+ if (atu->type == PCIE_ATU_TYPE_MSG) {
+ /* The data-less messages only for now */
+ val |= PCIE_ATU_INHIBIT_PAYLOAD | atu->code;
+ }
+ dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL2, val);
/*
* Make sure ATU enable takes effect before any subsequent config
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index d21db82e586d5..703b50bc5e0f1 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -148,11 +148,13 @@
#define PCIE_ATU_TYPE_IO 0x2
#define PCIE_ATU_TYPE_CFG0 0x4
#define PCIE_ATU_TYPE_CFG1 0x5
+#define PCIE_ATU_TYPE_MSG 0x10
#define PCIE_ATU_TD BIT(8)
#define PCIE_ATU_FUNC_NUM(pf) ((pf) << 20)
#define PCIE_ATU_REGION_CTRL2 0x004
#define PCIE_ATU_ENABLE BIT(31)
#define PCIE_ATU_BAR_MODE_ENABLE BIT(30)
+#define PCIE_ATU_INHIBIT_PAYLOAD BIT(22)
#define PCIE_ATU_FUNC_NUM_MATCH_EN BIT(19)
#define PCIE_ATU_LOWER_BASE 0x008
#define PCIE_ATU_UPPER_BASE 0x00C
@@ -303,6 +305,8 @@ struct dw_pcie_ob_atu_cfg {
int index;
int type;
u8 func_no;
+ u8 code;
+ u8 routing;
u64 cpu_addr;
u64 pci_addr;
u64 size;
--
2.34.1
next prev parent reply other threads:[~2024-04-18 16:05 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-18 16:04 [PATCH v8 0/5] PCI: dwc: Add common pme_turn_off message by using outbound iATU Frank Li
2024-04-18 16:04 ` [PATCH v8 1/5] PCI: Add INTx Mechanism Messages macros Frank Li
2024-04-18 16:04 ` [PATCH v8 2/5] PCI: dwc: Consolidate args of dw_pcie_prog_outbound_atu() into a structure Frank Li
2024-04-18 16:04 ` Frank Li [this message]
2024-04-18 16:04 ` [PATCH v8 4/5] PCI: Add PCIE_MSG_CODE_PME_TURN_OFF message macro Frank Li
2024-04-18 16:04 ` [PATCH v8 5/5] PCI: dwc: Add generic MSG TLP support for sending PME_Turn_Off when system suspend Frank Li
2024-04-19 11:46 ` Manivannan Sadhasivam
2024-05-02 19:17 ` [PATCH v8 0/5] PCI: dwc: Add common pme_turn_off message by using outbound iATU Frank Li
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