From: Vidya Sagar <vidyas@nvidia.com>
To: Jisheng Zhang <Jisheng.Zhang@synaptics.com>,
Kishon Vijay Abraham I <kishon@ti.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Rob Herring <robh@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Jingoo Han <jingoohan1@gmail.com>, Kukjin Kim <kgene@kernel.org>,
Krzysztof Kozlowski <krzk@kernel.org>,
Richard Zhu <hongxing.zhu@nxp.com>,
Lucas Stach <l.stach@pengutronix.de>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>,
"Yue Wang" <yue.wang@Amlogic.com>,
Kevin Hilman <khilman@baylibre.com>,
"Neil Armstrong" <narmstrong@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Jesper Nilsson <jesper.nilsson@axis.com>,
Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
Xiaowei Song <songxiaowei@hisilicon.com>,
Binghui Wang <wangbinghui@hisilicon.com>,
Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Stanimir Varbanov <svarbanov@mm-sol.com>,
Pratyush Anand <pratyush.anand@gmail.com>,
Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
"Kunihiko Hayashi" <hayashi.kunihiko@socionext.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: "linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-samsung-soc@vger.kernel.org"
<linux-samsung-soc@vger.kernel.org>,
"linux-amlogic@lists.infradead.org"
<linux-amlogic@lists.infradead.org>,
"linux-arm-kernel@axis.com" <linux-arm-kernel@axis.com>,
"linux-arm-msm@vger.kernel.org" <linux-arm-msm@vger.kernel.org>,
"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>
Subject: Re: [PATCH v2 5/5] PCI: dwc: Move dw_pcie_msi_init() from each users to designware host
Date: Thu, 8 Oct 2020 11:13:47 +0530 [thread overview]
Message-ID: <2972e253-1d4f-1475-594b-024103959415@nvidia.com> (raw)
In-Reply-To: <20200924190742.76939458@xhacker.debian>
On 9/24/2020 4:37 PM, Jisheng Zhang wrote:
> External email: Use caution opening links or attachments
>
>
> Currently, dw_pcie_msi_init() allocates and maps page for msi, then
> program the PCIE_MSI_ADDR_LO and PCIE_MSI_ADDR_HI. The Root Complex
> may lose power during suspend-to-RAM, so when we resume, we want to
> redo the latter but not the former. If designware based driver (for
> example, pcie-tegra194.c) calls dw_pcie_msi_init() in resume path, the
> previous msi page will be leaked. From another side, except
> pci-dra7xx.c we can move the dw_pcie_msi_init() from each users to
> designware host, I.E move the msi page allocation and mapping to
> dw_pcie_host_init() and move the PCIE_MSI_ADDR_* programming to
> dw_pcie_setup_rc(). After this moving, we solve the msi page leakage
> as well.
>
> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
> ---
> drivers/pci/controller/dwc/pci-dra7xx.c | 1 +
> drivers/pci/controller/dwc/pci-exynos.c | 2 --
> drivers/pci/controller/dwc/pci-imx6.c | 3 ---
> drivers/pci/controller/dwc/pci-meson.c | 8 -------
> drivers/pci/controller/dwc/pcie-artpec6.c | 10 --------
> .../pci/controller/dwc/pcie-designware-host.c | 24 ++++++++++++-------
> .../pci/controller/dwc/pcie-designware-plat.c | 3 ---
> drivers/pci/controller/dwc/pcie-designware.h | 5 ++++
> drivers/pci/controller/dwc/pcie-histb.c | 3 ---
> drivers/pci/controller/dwc/pcie-kirin.c | 3 ---
> drivers/pci/controller/dwc/pcie-qcom.c | 3 ---
> drivers/pci/controller/dwc/pcie-spear13xx.c | 1 -
> drivers/pci/controller/dwc/pcie-tegra194.c | 2 --
> drivers/pci/controller/dwc/pcie-uniphier.c | 9 +------
> 14 files changed, 22 insertions(+), 55 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
> index dc387724cf08..d8b74389e353 100644
> --- a/drivers/pci/controller/dwc/pci-dra7xx.c
> +++ b/drivers/pci/controller/dwc/pci-dra7xx.c
> @@ -210,6 +210,7 @@ static int dra7xx_pcie_host_init(struct pcie_port *pp)
> dra7xx_pcie_establish_link(pci);
> dw_pcie_wait_for_link(pci);
> dw_pcie_msi_init(pp);
> + dw_pcie_msi_config(pp);
> dra7xx_pcie_enable_interrupts(dra7xx);
>
> return 0;
> diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c
> index 8d82c43ae299..9cca0ce79777 100644
> --- a/drivers/pci/controller/dwc/pci-exynos.c
> +++ b/drivers/pci/controller/dwc/pci-exynos.c
> @@ -298,8 +298,6 @@ static void exynos_pcie_msi_init(struct exynos_pcie *ep)
> struct pcie_port *pp = &pci->pp;
> u32 val;
>
> - dw_pcie_msi_init(pp);
> -
> /* enable MSI interrupt */
> val = exynos_pcie_readl(ep->mem_res->elbi_base, PCIE_IRQ_EN_LEVEL);
> val |= IRQ_MSI_ENABLE;
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 5fef2613b223..dba6e351e3df 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -848,9 +848,6 @@ static int imx6_pcie_host_init(struct pcie_port *pp)
> dw_pcie_setup_rc(pp);
> imx6_pcie_establish_link(imx6_pcie);
>
> - if (IS_ENABLED(CONFIG_PCI_MSI))
> - dw_pcie_msi_init(pp);
> -
> return 0;
> }
>
> diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c
> index 4f183b96afbb..cd0d9dd8dd61 100644
> --- a/drivers/pci/controller/dwc/pci-meson.c
> +++ b/drivers/pci/controller/dwc/pci-meson.c
> @@ -377,12 +377,6 @@ static int meson_pcie_establish_link(struct meson_pcie *mp)
> return dw_pcie_wait_for_link(pci);
> }
>
> -static void meson_pcie_enable_interrupts(struct meson_pcie *mp)
> -{
> - if (IS_ENABLED(CONFIG_PCI_MSI))
> - dw_pcie_msi_init(&mp->pci.pp);
> -}
> -
> static int meson_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
> u32 *val)
> {
> @@ -467,8 +461,6 @@ static int meson_pcie_host_init(struct pcie_port *pp)
> if (ret)
> return ret;
>
> - meson_pcie_enable_interrupts(mp);
> -
> return 0;
> }
>
> diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c
> index 97d50bb50f06..af1e6bb28e7a 100644
> --- a/drivers/pci/controller/dwc/pcie-artpec6.c
> +++ b/drivers/pci/controller/dwc/pcie-artpec6.c
> @@ -346,15 +346,6 @@ static void artpec6_pcie_deassert_core_reset(struct artpec6_pcie *artpec6_pcie)
> usleep_range(100, 200);
> }
>
> -static void artpec6_pcie_enable_interrupts(struct artpec6_pcie *artpec6_pcie)
> -{
> - struct dw_pcie *pci = artpec6_pcie->pci;
> - struct pcie_port *pp = &pci->pp;
> -
> - if (IS_ENABLED(CONFIG_PCI_MSI))
> - dw_pcie_msi_init(pp);
> -}
> -
> static int artpec6_pcie_host_init(struct pcie_port *pp)
> {
> struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> @@ -368,7 +359,6 @@ static int artpec6_pcie_host_init(struct pcie_port *pp)
> dw_pcie_setup_rc(pp);
> artpec6_pcie_establish_link(pci);
> dw_pcie_wait_for_link(pci);
> - artpec6_pcie_enable_interrupts(artpec6_pcie);
>
> return 0;
> }
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index 7a8adf597803..6603d7c36f2e 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -296,11 +296,23 @@ void dw_pcie_msi_deinit(struct pcie_port *pp)
> }
> }
>
> +void dw_pcie_msi_config(struct pcie_port *pp)
> +{
> + if (pp->msi_page) {
> + u64 msi_target = (u64)pp->msi_data;
> +
> + /* Program the msi_data */
> + dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
> + lower_32_bits(msi_target));
> + dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
> + upper_32_bits(msi_target));
> + }
> +}
> +
> void dw_pcie_msi_init(struct pcie_port *pp)
> {
> struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> struct device *dev = pci->dev;
> - u64 msi_target;
>
> pp->msi_page = alloc_page(GFP_KERNEL);
I'm not sure if it can be addressed in the same patch, but I think it is
required to call dma_set_coherent_mask() with 32-bit mask before calling
dma_map_single() as there are endpoint devices which are only 32-bit MSI
capable and it is required to restrict the MSI target address to always
be in 32-bit domain so that both kinds of endpoints (only 32-bit capable
and 64-bit capable) can work with this 32-bit MSI target.
> if (!pp->msi_page) {
> @@ -314,15 +326,7 @@ void dw_pcie_msi_init(struct pcie_port *pp)
> dev_err(dev, "Failed to map MSI data\n");
> __free_page(pp->msi_page);
> pp->msi_page = NULL;
> - return;
> }
> - msi_target = (u64)pp->msi_data;
> -
> - /* Program the msi_data */
> - dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
> - lower_32_bits(msi_target));
> - dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
> - upper_32_bits(msi_target));
> }
> EXPORT_SYMBOL_GPL(dw_pcie_msi_init);
>
> @@ -449,6 +453,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
> irq_set_chained_handler_and_data(pp->msi_irq,
> dw_chained_msi_isr,
> pp);
> + dw_pcie_msi_init(pp);
> } else {
> ret = pp->ops->msi_host_init(pp);
> if (ret < 0)
> @@ -654,6 +659,7 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
> (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
> 4, ~0);
> }
> + dw_pcie_msi_config(pp);
> }
>
> /* Setup RC BARs */
> diff --git a/drivers/pci/controller/dwc/pcie-designware-plat.c b/drivers/pci/controller/dwc/pcie-designware-plat.c
> index 712456f6ce36..9ccf69a3dcf4 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-plat.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-plat.c
> @@ -40,9 +40,6 @@ static int dw_plat_pcie_host_init(struct pcie_port *pp)
> dw_pcie_setup_rc(pp);
> dw_pcie_wait_for_link(pci);
>
> - if (IS_ENABLED(CONFIG_PCI_MSI))
> - dw_pcie_msi_init(pp);
> -
> return 0;
> }
>
> diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
> index 43b8061e1bec..40d22fe33afe 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.h
> +++ b/drivers/pci/controller/dwc/pcie-designware.h
> @@ -372,6 +372,7 @@ static inline void dw_pcie_dbi_ro_wr_dis(struct dw_pcie *pci)
> irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
> void dw_pcie_msi_init(struct pcie_port *pp);
> void dw_pcie_msi_deinit(struct pcie_port *pp);
> +void dw_pcie_msi_config(struct pcie_port *pp);
> void dw_pcie_setup_rc(struct pcie_port *pp);
> int dw_pcie_host_init(struct pcie_port *pp);
> void dw_pcie_host_deinit(struct pcie_port *pp);
> @@ -390,6 +391,10 @@ static inline void dw_pcie_msi_deinit(struct pcie_port *pp)
> {
> }
>
> +static inline void dw_pcie_msi_config(struct pcie_port *pp)
> +{
> +}
> +
> static inline void dw_pcie_setup_rc(struct pcie_port *pp)
> {
> }
> diff --git a/drivers/pci/controller/dwc/pcie-histb.c b/drivers/pci/controller/dwc/pcie-histb.c
> index 2a2835746077..fbf53e897ca7 100644
> --- a/drivers/pci/controller/dwc/pcie-histb.c
> +++ b/drivers/pci/controller/dwc/pcie-histb.c
> @@ -196,9 +196,6 @@ static int histb_pcie_host_init(struct pcie_port *pp)
> {
> histb_pcie_establish_link(pp);
>
> - if (IS_ENABLED(CONFIG_PCI_MSI))
> - dw_pcie_msi_init(pp);
> -
> return 0;
> }
>
> diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
> index e496f51e0152..d7246995daf0 100644
> --- a/drivers/pci/controller/dwc/pcie-kirin.c
> +++ b/drivers/pci/controller/dwc/pcie-kirin.c
> @@ -425,9 +425,6 @@ static int kirin_pcie_host_init(struct pcie_port *pp)
> {
> kirin_pcie_establish_link(pp);
>
> - if (IS_ENABLED(CONFIG_PCI_MSI))
> - dw_pcie_msi_init(pp);
> -
> return 0;
> }
>
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 3aac77a295ba..2abbb850fb56 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -1281,9 +1281,6 @@ static int qcom_pcie_host_init(struct pcie_port *pp)
>
> dw_pcie_setup_rc(pp);
>
> - if (IS_ENABLED(CONFIG_PCI_MSI))
> - dw_pcie_msi_init(pp);
> -
> qcom_ep_reset_deassert(pcie);
>
> ret = qcom_pcie_establish_link(pcie);
> diff --git a/drivers/pci/controller/dwc/pcie-spear13xx.c b/drivers/pci/controller/dwc/pcie-spear13xx.c
> index 62846562da0b..760e27de0082 100644
> --- a/drivers/pci/controller/dwc/pcie-spear13xx.c
> +++ b/drivers/pci/controller/dwc/pcie-spear13xx.c
> @@ -157,7 +157,6 @@ static void spear13xx_pcie_enable_interrupts(struct spear13xx_pcie *spear13xx_pc
>
> /* Enable MSI interrupt */
> if (IS_ENABLED(CONFIG_PCI_MSI)) {
> - dw_pcie_msi_init(pp);
> writel(readl(&app_reg->int_mask) |
> MSI_CTRL_INT, &app_reg->int_mask);
> }
> diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
> index 70498689d0c0..b51fe136d345 100644
> --- a/drivers/pci/controller/dwc/pcie-tegra194.c
> +++ b/drivers/pci/controller/dwc/pcie-tegra194.c
> @@ -783,8 +783,6 @@ static void tegra_pcie_enable_msi_interrupts(struct pcie_port *pp)
> struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
> u32 val;
>
> - dw_pcie_msi_init(pp);
> -
> /* Enable MSI interrupt generation */
> val = appl_readl(pcie, APPL_INTR_EN_L0_0);
> val |= APPL_INTR_EN_L0_0_SYS_MSI_INTR_EN;
> diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
> index 3a7f403b57b8..d7b465b669f4 100644
> --- a/drivers/pci/controller/dwc/pcie-uniphier.c
> +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> @@ -318,14 +318,7 @@ static int uniphier_pcie_host_init(struct pcie_port *pp)
> uniphier_pcie_irq_enable(priv);
>
> dw_pcie_setup_rc(pp);
> - ret = uniphier_pcie_establish_link(pci);
> - if (ret)
> - return ret;
> -
> - if (IS_ENABLED(CONFIG_PCI_MSI))
> - dw_pcie_msi_init(pp);
> -
> - return 0;
> + return uniphier_pcie_establish_link(pci);
> }
>
> static const struct dw_pcie_host_ops uniphier_pcie_host_ops = {
> --
> 2.28.0
>
next prev parent reply other threads:[~2020-10-08 5:44 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-24 11:05 [PATCH v2 0/5] PCI: dwc: improve msi handling Jisheng Zhang
2020-09-24 11:05 ` [PATCH v2 1/5] PCI: dwc: Call dma_unmap_page() before freeing the msi page Jisheng Zhang
2020-09-24 11:48 ` Gustavo Pimentel
2020-09-24 11:06 ` [PATCH v2 2/5] PCI: dwc: Check alloc_page() return value Jisheng Zhang
2020-09-24 11:47 ` Gustavo Pimentel
2020-09-29 17:29 ` Marc Zyngier
2020-09-30 1:23 ` Jisheng Zhang
2020-09-24 11:06 ` [PATCH v2 3/5] PCI: dwc: Rename dw_pcie_free_msi to dw_pcie_msi_deinit Jisheng Zhang
2020-09-24 11:49 ` Gustavo Pimentel
2020-09-24 11:07 ` [PATCH v2 4/5] PCI: dwc: Skip PCIE_MSI_INTR0* programming if MSI is disabled Jisheng Zhang
2020-09-24 11:49 ` Gustavo Pimentel
2020-09-24 11:07 ` [PATCH v2 5/5] PCI: dwc: Move dw_pcie_msi_init() from each users to designware host Jisheng Zhang
2020-10-08 5:43 ` Vidya Sagar [this message]
2021-03-07 22:10 ` Krzysztof Wilczyński
2021-03-11 6:50 ` Jisheng Zhang
2020-09-25 8:53 ` [PATCH v2 0/5] PCI: dwc: improve msi handling Jon Hunter
2020-09-25 9:17 ` Jisheng Zhang
2020-09-25 9:27 ` Jisheng Zhang
2020-09-25 15:13 ` Jon Hunter
2020-09-27 8:28 ` Jisheng Zhang
2020-09-28 17:46 ` Jon Hunter
2020-09-29 10:48 ` Jisheng Zhang
2020-09-29 13:22 ` Jon Hunter
2020-09-29 17:25 ` Marc Zyngier
2020-09-29 18:02 ` Jon Hunter
2020-09-29 18:12 ` Marc Zyngier
2020-10-06 6:26 ` Vidya Sagar
2020-10-06 6:36 ` Jisheng Zhang
2020-10-08 5:32 ` Vidya Sagar
2020-10-09 8:37 ` [PATCH] PCI: dwc: Move dw_pcie_msi_init() from each users to designware host Jisheng Zhang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2972e253-1d4f-1475-594b-024103959415@nvidia.com \
--to=vidyas@nvidia.com \
--cc=Jisheng.Zhang@synaptics.com \
--cc=agross@kernel.org \
--cc=bhelgaas@google.com \
--cc=bjorn.andersson@linaro.org \
--cc=festevam@gmail.com \
--cc=gustavo.pimentel@synopsys.com \
--cc=hayashi.kunihiko@socionext.com \
--cc=hongxing.zhu@nxp.com \
--cc=jbrunet@baylibre.com \
--cc=jesper.nilsson@axis.com \
--cc=jingoohan1@gmail.com \
--cc=jonathanh@nvidia.com \
--cc=kernel@pengutronix.de \
--cc=kgene@kernel.org \
--cc=khilman@baylibre.com \
--cc=kishon@ti.com \
--cc=krzk@kernel.org \
--cc=l.stach@pengutronix.de \
--cc=linux-amlogic@lists.infradead.org \
--cc=linux-arm-kernel@axis.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-imx@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-omap@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
--cc=linux-tegra@vger.kernel.org \
--cc=lorenzo.pieralisi@arm.com \
--cc=martin.blumenstingl@googlemail.com \
--cc=narmstrong@baylibre.com \
--cc=pratyush.anand@gmail.com \
--cc=robh@kernel.org \
--cc=s.hauer@pengutronix.de \
--cc=shawnguo@kernel.org \
--cc=songxiaowei@hisilicon.com \
--cc=svarbanov@mm-sol.com \
--cc=thierry.reding@gmail.com \
--cc=wangbinghui@hisilicon.com \
--cc=yamada.masahiro@socionext.com \
--cc=yue.wang@Amlogic.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).