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Message-ID: <001401d6134c$01b5c420$05214c60$@codeaurora.org>
Date: Wed, 15 Apr 2020 23:03:35 +0530
From: <pillair@...eaurora.org>
To: <ath10k@...ts.infradead.org>
Cc: <linux-wireless@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 3/3] ath10k: Add support for targets without trustzone
Hi Kalle,
I have sent out v3 for this patchset after correcting the firmware structure
name which was added in ath10k snoc structure
Thanks,
Rakesh Pillai.
> -----Original Message-----
> From: Rakesh Pillai <pillair@...eaurora.org>
> Sent: Wednesday, March 25, 2020 4:32 PM
> To: ath10k@...ts.infradead.org
> Cc: linux-wireless@...r.kernel.org; devicetree@...r.kernel.org; linux-
> kernel@...r.kernel.org; Rakesh Pillai <pillair@...eaurora.org>
> Subject: [PATCH v2 3/3] ath10k: Add support for targets without trustzone
>
> Add the support to attach and map iommu
> domain for targets which do not have the
> support of TrustZone.
>
> Tested HW: WCN3990
> Tested FW: WLAN.HL.3.1-01040-QCAHLSWMTPLZ-1
>
> Signed-off-by: Rakesh Pillai <pillair@...eaurora.org>
> ---
> drivers/net/wireless/ath/ath10k/snoc.c | 118
> ++++++++++++++++++++++++++++++++-
> drivers/net/wireless/ath/ath10k/snoc.h | 7 ++
> 2 files changed, 124 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/ath/ath10k/snoc.c
> b/drivers/net/wireless/ath/ath10k/snoc.c
> index 3633ea5..7a7e79b 100644
> --- a/drivers/net/wireless/ath/ath10k/snoc.c
> +++ b/drivers/net/wireless/ath/ath10k/snoc.c
> @@ -12,6 +12,7 @@
> #include <linux/property.h>
> #include <linux/regulator/consumer.h>
> #include <linux/of_address.h>
> +#include <linux/iommu.h>
>
> #include "ce.h"
> #include "coredump.h"
> @@ -1499,6 +1500,111 @@ static int ath10k_setup_msa_resources(struct
> ath10k *ar, u32 msa_size)
> return 0;
> }
>
> +static int ath10k_fw_init(struct ath10k *ar)
> +{
> + struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
> + struct device *host_dev = &ar_snoc->dev->dev;
> + struct platform_device_info info;
> + struct iommu_domain *iommu_dom;
> + struct platform_device *pdev;
> + struct device_node *node;
> + int ret;
> +
> + node = of_get_child_by_name(host_dev->of_node, "wifi-
> firmware");
> + if (!node) {
> + ar_snoc->use_tz = true;
> + return 0;
> + }
> +
> + memset(&info, 0, sizeof(info));
> + info.fwnode = &node->fwnode;
> + info.parent = host_dev;
> + info.name = node->name;
> + info.dma_mask = DMA_BIT_MASK(32);
> +
> + pdev = platform_device_register_full(&info);
> + if (IS_ERR(pdev)) {
> + of_node_put(node);
> + return PTR_ERR(pdev);
> + }
> +
> + pdev->dev.of_node = node;
> +
> + ret = of_dma_configure(&pdev->dev, node, true);
> + if (ret) {
> + ath10k_err(ar, "dma configure fail: %d\n", ret);
> + goto err_unregister;
> + }
> +
> + ar_snoc->fw.dev = &pdev->dev;
> +
> + iommu_dom = iommu_domain_alloc(&platform_bus_type);
> + if (!iommu_dom) {
> + ath10k_err(ar, "failed to allocate iommu domain\n");
> + ret = -ENOMEM;
> + goto err_unregister;
> + }
> +
> + ret = iommu_attach_device(iommu_dom, ar_snoc->fw.dev);
> + if (ret) {
> + ath10k_err(ar, "could not attach device: %d\n", ret);
> + goto err_iommu_free;
> + }
> +
> + ar_snoc->fw.iommu_domain = iommu_dom;
> + ar_snoc->fw.fw_start_addr = ar->msa.paddr;
> +
> + ret = iommu_map(iommu_dom, ar_snoc->fw.fw_start_addr,
> + ar->msa.paddr, ar->msa.mem_size,
> + IOMMU_READ | IOMMU_WRITE);
> + if (ret) {
> + ath10k_err(ar, "failed to map firmware region: %d\n", ret);
> + goto err_iommu_detach;
> + }
> +
> + of_node_put(node);
> +
> + return 0;
> +
> +err_iommu_detach:
> + iommu_detach_device(iommu_dom, ar_snoc->fw.dev);
> +
> +err_iommu_free:
> + iommu_domain_free(iommu_dom);
> +
> +err_unregister:
> + platform_device_unregister(pdev);
> + of_node_put(node);
> +
> + return ret;
> +}
> +
> +static int ath10k_fw_deinit(struct ath10k *ar)
> +{
> + struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
> + const size_t mapped_size = ar_snoc->fw.mapped_mem_size;
> + struct iommu_domain *iommu;
> + size_t unmapped_size;
> +
> + if (ar_snoc->use_tz)
> + return 0;
> +
> + iommu = ar_snoc->fw.iommu_domain;
> +
> + unmapped_size = iommu_unmap(iommu, ar_snoc-
> >fw.fw_start_addr,
> + mapped_size);
> + if (unmapped_size != mapped_size)
> + ath10k_err(ar, "failed to unmap firmware: %zu\n",
> + unmapped_size);
> +
> + iommu_detach_device(iommu, ar_snoc->fw.dev);
> + iommu_domain_free(iommu);
> +
> + platform_device_unregister(to_platform_device(ar_snoc->fw.dev));
> +
> + return 0;
> +}
> +
> static const struct of_device_id ath10k_snoc_dt_match[] = {
> { .compatible = "qcom,wcn3990-wifi",
> .data = &drv_priv,
> @@ -1607,16 +1713,25 @@ static int ath10k_snoc_probe(struct
> platform_device *pdev)
> goto err_power_off;
> }
>
> + ret = ath10k_fw_init(ar);
> + if (ret) {
> + ath10k_err(ar, "failed to initialize firmware: %d\n", ret);
> + goto err_power_off;
> + }
> +
> ret = ath10k_qmi_init(ar, msa_size);
> if (ret) {
> ath10k_warn(ar, "failed to register wlfw qmi client: %d\n",
> ret);
> - goto err_power_off;
> + goto err_fw_deinit;
> }
>
> ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc probe\n");
>
> return 0;
>
> +err_fw_deinit:
> + ath10k_fw_deinit(ar);
> +
> err_power_off:
> ath10k_hw_power_off(ar);
>
> @@ -1648,6 +1763,7 @@ static int ath10k_snoc_remove(struct
> platform_device *pdev)
>
> ath10k_core_unregister(ar);
> ath10k_hw_power_off(ar);
> + ath10k_fw_deinit(ar);
> ath10k_snoc_free_irq(ar);
> ath10k_snoc_release_resource(ar);
> ath10k_qmi_deinit(ar);
> diff --git a/drivers/net/wireless/ath/ath10k/snoc.h
> b/drivers/net/wireless/ath/ath10k/snoc.h
> index c05df45..18e19fb 100644
> --- a/drivers/net/wireless/ath/ath10k/snoc.h
> +++ b/drivers/net/wireless/ath/ath10k/snoc.h
> @@ -55,6 +55,13 @@ struct regulator_bulk_data;
> struct ath10k_snoc {
> struct platform_device *dev;
> struct ath10k *ar;
> + unsigned int use_tz;
> + struct video_firmware {
> + struct device *dev;
> + dma_addr_t fw_start_addr;
> + struct iommu_domain *iommu_domain;
> + size_t mapped_mem_size;
> + } fw;
> void __iomem *mem;
> dma_addr_t mem_pa;
> struct ath10k_snoc_target_info target_info;
> --
> 2.7.4
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