Merge "msm: ipa3: add an API to unlock PCIe memory regions" (89ab8d65) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/platform/msm/ipa/ipa_api.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -2758,6 +2758,18 @@ int ipa_tear_down_uc_offload_pipes(int ipa_ep_idx_ul,
		return ret;
		}

		/**
		* ipa_tz_unlock_reg() - Allow AP access to memory regions controlled by TZ
		*/
		int ipa_tz_unlock_reg(struct ipa_tz_unlock_reg_info *reg_info, u16 num_regs)
		{
		int ret;

		IPA_API_DISPATCH_RETURN(ipa_tz_unlock_reg, reg_info, num_regs);

		return ret;
		}

		static const struct dev_pm_ops ipa_pm_ops = {
		.suspend_noirq = ipa_ap_suspend,
		.resume_noirq = ipa_ap_resume,

drivers/platform/msm/ipa/ipa_api.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -365,6 +365,9 @@ struct ipa_api_controller {

		int (*ipa_tear_down_uc_offload_pipes)(int ipa_ep_idx_ul,
		int ipa_ep_idx_dl);

		int (ipa_tz_unlock_reg)(struct ipa_tz_unlock_reg_info reg_info,
		u16 num_regs);
		};

		#ifdef CONFIG_IPA

drivers/platform/msm/ipa/ipa_v3/ipa.c

+52 −38

Original line number	Diff line number	Diff line
		@@ -4210,30 +4210,41 @@ static ssize_t ipa3_write(struct file file, const char __user buf,
		return count;
		}

		static int ipa3_tz_unlock_reg(struct ipa3_context *ipa3_ctx)
		/**
		* ipa3_tz_unlock_reg - Unlocks memory regions so that they become accessible
		* from AP.
		* @reg_info - Pointer to array of memory regions to unlock
		* @num_regs - Number of elements in the array
		*
		* Converts the input array of regions to a struct that TZ understands and
		* issues an SCM call.
		* Also flushes the memory cache to DDR in order to make sure that TZ sees the
		* correct data structure.
		*
		* Returns: 0 on success, negative on failure
		*/
		int ipa3_tz_unlock_reg(struct ipa_tz_unlock_reg_info *reg_info, u16 num_regs)
		{
		int i, size, ret, resp;
		struct tz_smmu_ipa_protect_region_iovec_s *ipa_tz_unlock_vec;
		struct tz_smmu_ipa_protect_region_s cmd_buf;

		if (ipa3_ctx && ipa3_ctx->ipa_tz_unlock_reg_num > 0) {
		size = ipa3_ctx->ipa_tz_unlock_reg_num *
		sizeof(struct tz_smmu_ipa_protect_region_iovec_s);
		if (reg_info == NULL \|\| num_regs == 0) {
		IPAERR("Bad parameters\n");
		return -EFAULT;
		}

		size = num_regs * sizeof(struct tz_smmu_ipa_protect_region_iovec_s);
		ipa_tz_unlock_vec = kzalloc(PAGE_ALIGN(size), GFP_KERNEL);
		if (ipa_tz_unlock_vec == NULL)
		return -ENOMEM;

		for (i = 0; i < ipa3_ctx->ipa_tz_unlock_reg_num; i++) {
		ipa_tz_unlock_vec[i].input_addr =
		ipa3_ctx->ipa_tz_unlock_reg[i].reg_addr ^
		(ipa3_ctx->ipa_tz_unlock_reg[i].reg_addr &
		0xFFF);
		ipa_tz_unlock_vec[i].output_addr =
		ipa3_ctx->ipa_tz_unlock_reg[i].reg_addr ^
		(ipa3_ctx->ipa_tz_unlock_reg[i].reg_addr &
		0xFFF);
		ipa_tz_unlock_vec[i].size =
		ipa3_ctx->ipa_tz_unlock_reg[i].size;
		for (i = 0; i < num_regs; i++) {
		ipa_tz_unlock_vec[i].input_addr = reg_info[i].reg_addr ^
		(reg_info[i].reg_addr & 0xFFF);
		ipa_tz_unlock_vec[i].output_addr = reg_info[i].reg_addr ^
		(reg_info[i].reg_addr & 0xFFF);
		ipa_tz_unlock_vec[i].size = reg_info[i].size;
		ipa_tz_unlock_vec[i].attr = IPA_TZ_UNLOCK_ATTRIBUTE;
		}

		@@ -4253,7 +4264,7 @@ static int ipa3_tz_unlock_reg(struct ipa3_context *ipa3_ctx)
		return -EFAULT;
		}
		kfree(ipa_tz_unlock_vec);
		}

		return 0;
		}

		@@ -4361,7 +4372,10 @@ static int ipa3_pre_init(const struct ipa3_plat_drv_res *resource_p,
		}

		/* unlock registers for uc */
		ipa3_tz_unlock_reg(ipa3_ctx);
		result = ipa3_tz_unlock_reg(ipa3_ctx->ipa_tz_unlock_reg,
		ipa3_ctx->ipa_tz_unlock_reg_num);
		if (result)
		IPAERR("Failed to unlock memory region using TZ\n");

		/* default aggregation parameters */
		ipa3_ctx->aggregation_type = IPA_MBIM_16;
		@@ -5118,7 +5132,7 @@ static int get_ipa_dts_configuration(struct platform_device *pdev,
		ipa_tz_unlock_reg[pos++];
		ipa_drv_res->ipa_tz_unlock_reg[i].size =
		ipa_tz_unlock_reg[pos++];
		IPADBG("tz unlock reg %d: addr 0x%pa size %d\n", i,
		IPADBG("tz unlock reg %d: addr 0x%pa size %llu\n", i,
		&ipa_drv_res->ipa_tz_unlock_reg[i].reg_addr,
		ipa_drv_res->ipa_tz_unlock_reg[i].size);
		}

drivers/platform/msm/ipa/ipa_v3/ipa_i.h

+1 −5

Original line number	Diff line number	Diff line
		@@ -1066,11 +1066,6 @@ struct ipa3_ready_cb_info {
		void *user_data;
		};

		struct ipa_tz_unlock_reg_info {
		u64 reg_addr;
		u32 size;
		};

		/**
		* struct ipa3_context - IPA context
		* @class: pointer to the struct class
		@@ -2020,4 +2015,5 @@ int ipa3_smmu_map_peer_buff(u64 iova, phys_addr_t phys_addr,
		u32 size, bool map);
		struct dentry *ipa_debugfs_get_root(void);
		bool ipa3_is_msm_device(void);
		int ipa3_tz_unlock_reg(struct ipa_tz_unlock_reg_info *reg_info, u16 num_regs);
		#endif /* _IPA3_I_H_ */

drivers/platform/msm/ipa/ipa_v3/ipa_utils.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -4698,6 +4698,7 @@ int ipa3_bind_api_controller(enum ipa_hw_type ipa_hw_type,
		api_ctrl->ipa_setup_uc_ntn_pipes = ipa3_setup_uc_ntn_pipes;
		api_ctrl->ipa_tear_down_uc_offload_pipes =
		ipa3_tear_down_uc_offload_pipes;
		api_ctrl->ipa_tz_unlock_reg = ipa3_tz_unlock_reg;

		return 0;
		}