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Commit 5da02786 authored by Kasin Li's avatar Kasin Li Committed by Hai Li
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soc: qcom: hgsl: Add doorbell support to gvm 



Used under guest system, it submits GPU tasks into hardware while host
driver is unaware of it.

Hgsl communicates with GPU hardware using either GPU registers or
TCSR compute signaling hardware block.

Change-Id: I881941953ee2340a4c47f10e85e4b0a1dfb87a50
Signed-off-by: default avatarKasin Li <donglil@codeaurora.org>
Signed-off-by: default avatarHai Li <hali@codeaurora.org>
Signed-off-by: default avatarThomas (Wonyoung) Yun <wyun@codeaurora.org>
parent d0e7d3c3

Documentation/devicetree/bindings/soc/qcom/hgsl-tcsr.txt

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Top Control and Status Register(TCSR) for HGSL



TCSR hardware contains compute signal sub-block, which allows drivers in hypervisor

Linux to communicate with GPU hardware directly. This HGSL TCSR driver is to enable

the TCSR compute signal hardware. There are multiple instances of compute signal.

Each instance is either a signal sender or signal receiver.



The HGSL TCSR driver is built on top of generic TCSR driver, refer to

Documentation/devicetree/bindings/mfd/qcom,tcsr.txt for the generic TCSR driver.



Required properties:

- compatible : Must be "qcom,hgsl-tcsr-sender" or "qcom,hgsl-tcsr-receiver"

- syscon     : Point to the generic TCSR compute signal node

- syscon-glb : Point to the generice TCSR node for compute signal global control.

	       This is only needed by signal sender.

- interrupts : Specify IRQ information used by the compute signal.

	       This is only needed by signal receiver.



Examples:

	hgsl_tcsr_sender0: hgsl_tcsr_sender0 {

		compatible = "qcom,hgsl-tcsr-sender";

		syscon = <&tcsr_compute_signal_sender0>;

		syscon-glb = <&tcsr_compute_signal_glb>;

	};



	hgsl_tcsr_receiver0: hgsl_tcsr_receiver0 {

		compatible = "qcom,hgsl-tcsr-receiver";

		syscon = <&tcsr_compute_signal_receiver0>;

		interrupts = <0 238 0>;

	};

Documentation/devicetree/bindings/soc/qcom/hgsl.txt

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* HGSL



HGSL(Hypervisor Graphics system layer) is graphics driver under the hypervisor system.



Required properties:

- compatible : Must be "qcom,hgsl"



- reg : physical base address and length of the register set(s).



- reg-names : names corresponding to each reg property value.

	      reg_hwver: HW version registers

	      reg_doorbell_idx: address of GMUAO_DOORBELL_IDX



Optional properties:

- qcom,glb-db-senders : Point to possible nodes of HGSL TCSR sender. The user will select

		        which sender to use. The driver will use TCSR compute signal to

		        send signal to GPU.

- qcom,glb-db-receivers : Point to possible nodes of HGSL TCSR receiver. The user will

			  select which receiver to use. The driver will use TCSR compute

			  signal to receive signal from GPU.



Example:

	msm_gpu_hyp {

		compatible = "qcom,hgsl";

		reg = <0x2c00000 0x8>, <0x2c8f000 0x4>;

		reg-names = "hgsl_reg_hwinf", "hgsl_reg_gmucx";



		qcom,glb-db-senders = <&hgsl_tcsr_sender0 &hgsl_tcsr_sender1>;

		qcom,glb-db-receivers = <&hgsl_tcsr_receiver0 &hgsl_tcsr_receiver1>;

	};

drivers/soc/qcom/Kconfig

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@@ -886,6 +886,7 @@ endif # MSM_PM || MSM_PM_LEGACY 
source "drivers/soc/qcom/memshare/Kconfig"

source "drivers/soc/qcom/hab/Kconfig"

source "drivers/soc/qcom/rmnet_ctl/Kconfig"

source "drivers/soc/qcom/hgsl/Kconfig"



config MSM_PERFORMANCE

	tristate "msm performance driver to support userspace fmin/fmax request"

drivers/soc/qcom/Makefile

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@@ -105,6 +105,7 @@ obj-$(CONFIG_QCOM_CDSP_RM) += cdsprm.o 
obj-$(CONFIG_QCOM_CX_IPEAK) += cx_ipeak.o

obj-$(CONFIG_QCOM_AOP_DDR_MESSAGING) += aop_ddr_msgs.o

obj-$(CONFIG_MSM_HAB) += hab/

obj-$(CONFIG_QCOM_HGSL) += hgsl/

obj-$(CONFIG_QCOM_HYP_CORE_CTL) += hyp_core_ctl.o

obj-$(CONFIG_QCOM_AOP_DDRSS_COMMANDS) += aop_ddrss_cmds.o

obj-$(CONFIG_RMNET_CTL) += rmnet_ctl/

drivers/soc/qcom/hgsl/Kconfig

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#

# Hypervisor graphics system layer configuration

#

config QCOM_HGSL_TCSR_SIGNAL

	bool "TCSR signal for Hypervisor GSL"

	depends on MFD_SYSCON

	help

	  The TCSR compute signal module provides hgsl driver

	  in hypervisor Linux a way to send/receive signals

	  to/from A6x GPU hardware directly, without going

	  through host system.



config QCOM_HGSL

	bool "Graphics driver for Hypervisor"

	depends on QTI_GVM

	depends on QCOM_HGSL_TCSR_SIGNAL

	help

	  This driver could help commands submmitting functions for

	  hypervisor Linux. With HFI feature provided by A6x, it

	  could submit commands directly to hardware without passing

	  them to host system.