Add the support to attach WCN6750 and map iommu domain
for targets which do not have the support of TrustZone.
Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.1.0.1-00573-QCAMSLSWPLZ-1
Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1
Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.5.0.1-01100-QCAHKSWPL_SILICONZ-1
Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-00192-QCAHKSWPL_SILICONZ-1
Signed-off-by: Manikanta Pubbisetty <quic_mpubbise@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath11k/ahb.c | 174 +++++++++++++++++++++++++++++++++-
drivers/net/wireless/ath/ath11k/ahb.h | 9 ++
2 files changed, 181 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath11k/ahb.c b/drivers/net/wireless/ath/ath11k/ahb.c
index 219592d..7cb13a0 100644
--- a/drivers/net/wireless/ath/ath11k/ahb.c
+++ b/drivers/net/wireless/ath/ath11k/ahb.c
@@ -9,6 +9,8 @@
#include <linux/of_device.h>
#include <linux/of.h>
#include <linux/dma-mapping.h>
+#include <linux/of_address.h>
+#include <linux/iommu.h>
#include "ahb.h"
#include "debug.h"
#include "hif.h"
@@ -772,6 +774,166 @@ static int ath11k_ahb_setup_resources(struct ath11k_base *ab)
return 0;
}
+static int ath11k_ahb_setup_msa_resources(struct ath11k_base *ab)
+{
+ struct ath11k_ahb *ab_ahb = ath11k_ahb_priv(ab);
+ struct device *dev = ab->dev;
+ struct device_node *node;
+ struct resource r;
+ int ret;
+
+ node = of_parse_phandle(dev->of_node, "memory-region", 0);
+ if (!node)
+ return -ENOENT;
+
+ ret = of_address_to_resource(node, 0, &r);
+ of_node_put(node);
+ if (ret) {
+ dev_err(dev, "failed to resolve msa fixed region\n");
+ return ret;
+ }
+
+ ab_ahb->fw.msa_paddr = r.start;
+ ab_ahb->fw.msa_size = resource_size(&r);
+
+ node = of_parse_phandle(dev->of_node, "memory-region", 1);
+ if (!node)
+ return -ENOENT;
+
+ ret = of_address_to_resource(node, 0, &r);
+ of_node_put(node);
+ if (ret) {
+ dev_err(dev, "failed to resolve ce fixed region\n");
+ return ret;
+ }
+
+ ab_ahb->fw.ce_paddr = r.start;
+ ab_ahb->fw.ce_size = resource_size(&r);
+
+ return 0;
+}
+
+static int ath11k_ahb_fw_resources_init(struct ath11k_base *ab)
+{
+ struct ath11k_ahb *ab_ahb = ath11k_ahb_priv(ab);
+ struct device *host_dev = ab->dev;
+ struct platform_device_info info = {0};
+ 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) {
+ ab_ahb->fw.use_tz = true;
+ return 0;
+ }
+
+ ret = ath11k_ahb_setup_msa_resources(ab);
+ if (ret) {
+ ath11k_err(ab, "failed to setup msa resources\n");
+ return ret;
+ }
+
+ 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);
+ }
+
+ ret = of_dma_configure(&pdev->dev, node, true);
+ if (ret) {
+ ath11k_err(ab, "dma configure fail: %d\n", ret);
+ goto err_unregister;
+ }
+
+ ab_ahb->fw.dev = &pdev->dev;
+
+ iommu_dom = iommu_domain_alloc(&platform_bus_type);
+ if (!iommu_dom) {
+ ath11k_err(ab, "failed to allocate iommu domain\n");
+ ret = -ENOMEM;
+ goto err_unregister;
+ }
+
+ ret = iommu_attach_device(iommu_dom, ab_ahb->fw.dev);
+ if (ret) {
+ ath11k_err(ab, "could not attach device: %d\n", ret);
+ goto err_iommu_free;
+ }
+
+ ret = iommu_map(iommu_dom, ab_ahb->fw.msa_paddr,
+ ab_ahb->fw.msa_paddr, ab_ahb->fw.msa_size,
+ IOMMU_READ | IOMMU_WRITE);
+ if (ret) {
+ ath11k_err(ab, "failed to map firmware region: %d\n", ret);
+ goto err_iommu_detach;
+ }
+
+ ret = iommu_map(iommu_dom, ab_ahb->fw.ce_paddr,
+ ab_ahb->fw.ce_paddr, ab_ahb->fw.ce_size,
+ IOMMU_READ | IOMMU_WRITE);
+ if (ret) {
+ ath11k_err(ab, "failed to map firmware CE region: %d\n", ret);
+ goto err_iommu_unmap;
+ }
+
+ ab_ahb->fw.use_tz = false;
+ ab_ahb->fw.iommu_domain = iommu_dom;
+ of_node_put(node);
+
+ return 0;
+
+err_iommu_unmap:
+ iommu_unmap(iommu_dom, ab_ahb->fw.msa_paddr, ab_ahb->fw.msa_size);
+
+err_iommu_detach:
+ iommu_detach_device(iommu_dom, ab_ahb->fw.dev);
+
+err_iommu_free:
+ iommu_domain_free(iommu_dom);
+
+err_unregister:
+ platform_device_unregister(pdev);
+ of_node_put(node);
+
+ return ret;
+}
+
+static int ath11k_ahb_fw_resource_deinit(struct ath11k_base *ab)
+{
+ struct ath11k_ahb *ab_ahb = ath11k_ahb_priv(ab);
+ struct iommu_domain *iommu;
+ size_t unmapped_size;
+
+ if (ab_ahb->fw.use_tz)
+ return 0;
+
+ iommu = ab_ahb->fw.iommu_domain;
+
+ unmapped_size = iommu_unmap(iommu, ab_ahb->fw.msa_paddr, ab_ahb->fw.msa_size);
+ if (unmapped_size != ab_ahb->fw.msa_size)
+ ath11k_err(ab, "failed to unmap firmware: %zu\n",
+ unmapped_size);
+
+ unmapped_size = iommu_unmap(iommu, ab_ahb->fw.ce_paddr, ab_ahb->fw.ce_size);
+ if (unmapped_size != ab_ahb->fw.ce_size)
+ ath11k_err(ab, "failed to unmap firmware CE memory: %zu\n",
+ unmapped_size);
+
+ iommu_detach_device(iommu, ab_ahb->fw.dev);
+ iommu_domain_free(iommu);
+
+ platform_device_unregister(to_platform_device(ab_ahb->fw.dev));
+
+ return 0;
+}
+
static int ath11k_ahb_probe(struct platform_device *pdev)
{
struct ath11k_base *ab;
@@ -826,13 +988,17 @@ static int ath11k_ahb_probe(struct platform_device *pdev)
if (ret)
goto err_core_free;
- ret = ath11k_core_pre_init(ab);
+ ret = ath11k_ahb_fw_resources_init(ab);
if (ret)
goto err_core_free;
+ ret = ath11k_core_pre_init(ab);
+ if (ret)
+ goto err_fw_deinit;
+
ret = ath11k_hal_srng_init(ab);
if (ret)
- goto err_core_free;
+ goto err_fw_deinit;
ret = ath11k_ce_alloc_pipes(ab);
if (ret) {
@@ -870,6 +1036,9 @@ static int ath11k_ahb_probe(struct platform_device *pdev)
err_hal_srng_deinit:
ath11k_hal_srng_deinit(ab);
+err_fw_deinit:
+ ath11k_ahb_fw_resource_deinit(ab);
+
err_core_free:
ath11k_core_free(ab);
platform_set_drvdata(pdev, NULL);
@@ -905,6 +1074,7 @@ static int ath11k_ahb_remove(struct platform_device *pdev)
qmi_fail:
ath11k_ahb_free_irq(ab);
ath11k_hal_srng_deinit(ab);
+ ath11k_ahb_fw_resource_deinit(ab);
ath11k_ce_free_pipes(ab);
ath11k_core_free(ab);
platform_set_drvdata(pdev, NULL);
diff --git a/drivers/net/wireless/ath/ath11k/ahb.h b/drivers/net/wireless/ath/ath11k/ahb.h
index 1ae038e..4c7872d 100644
--- a/drivers/net/wireless/ath/ath11k/ahb.h
+++ b/drivers/net/wireless/ath/ath11k/ahb.h
@@ -13,6 +13,15 @@ struct ath11k_base;
struct ath11k_ahb {
struct rproc *tgt_rproc;
+ struct {
+ struct device *dev;
+ struct iommu_domain *iommu_domain;
+ dma_addr_t msa_paddr;
+ u32 msa_size;
+ dma_addr_t ce_paddr;
+ u32 ce_size;
+ bool use_tz;
+ } fw;
};
static inline struct ath11k_ahb *ath11k_ahb_priv(struct ath11k_base *ab)
--
2.7.4
