Re: [Freedreno] [PATCH v7 6/7] drm/msm/gpu: add ocmem init/cleanup functions

[Jordan Crouse <jcrouse@codeaurora.org>]

On Fri, Aug 23, 2019 at 05:16:36AM -0700, Brian Masney wrote:
> The files a3xx_gpu.c and a4xx_gpu.c have ifdefs for the OCMEM support
> that was missing upstream. Add two new functions (adreno_gpu_ocmem_init
> and adreno_gpu_ocmem_cleanup) that removes some duplicated code.

Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>

> Signed-off-by: Brian Masney <masneyb@onstation.org>
> ---
> Changes since v6:
> - None
> 
> Changes since v5:
> - None
> 
> Changes since v4:
> - None
> 
> Changes since v3:
> - None
> 
> Changes since v2:
> - Check for -ENODEV error of_get_ocmem()
> - remove fail_cleanup_ocmem label in a[34]xx_gpu_init
> 
> Changes since v1:
> - remove CONFIG_QCOM_OCMEM #ifdefs
> - use unsigned long for memory addresses instead of uint32_t
> - add 'depends on QCOM_OCMEM || QCOM_OCMEM=n' to Kconfig
> 
>  drivers/gpu/drm/msm/Kconfig             |  1 +
>  drivers/gpu/drm/msm/adreno/a3xx_gpu.c   | 28 +++++------------
>  drivers/gpu/drm/msm/adreno/a3xx_gpu.h   |  3 +-
>  drivers/gpu/drm/msm/adreno/a4xx_gpu.c   | 25 ++++------------
>  drivers/gpu/drm/msm/adreno/a4xx_gpu.h   |  3 +-
>  drivers/gpu/drm/msm/adreno/adreno_gpu.c | 40 +++++++++++++++++++++++++
>  drivers/gpu/drm/msm/adreno/adreno_gpu.h | 10 +++++++
>  7 files changed, 66 insertions(+), 44 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig
> index 9c37e4de5896..b3d3b2172659 100644
> --- a/drivers/gpu/drm/msm/Kconfig
> +++ b/drivers/gpu/drm/msm/Kconfig
> @@ -7,6 +7,7 @@ config DRM_MSM
>  	depends on OF && COMMON_CLK
>  	depends on MMU
>  	depends on INTERCONNECT || !INTERCONNECT
> +	depends on QCOM_OCMEM || QCOM_OCMEM=n
>  	select QCOM_MDT_LOADER if ARCH_QCOM
>  	select REGULATOR
>  	select DRM_KMS_HELPER
> diff --git a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
> index 5f7e98028eaf..7ad14937fcdf 100644
> --- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
> @@ -6,10 +6,6 @@
>   * Copyright (c) 2014 The Linux Foundation. All rights reserved.
>   */
>  
> -#ifdef CONFIG_MSM_OCMEM
> -#  include <mach/ocmem.h>
> -#endif
> -
>  #include "a3xx_gpu.h"
>  
>  #define A3XX_INT0_MASK \
> @@ -195,9 +191,9 @@ static int a3xx_hw_init(struct msm_gpu *gpu)
>  		gpu_write(gpu, REG_A3XX_RBBM_GPR0_CTL, 0x00000000);
>  
>  	/* Set the OCMEM base address for A330, etc */
> -	if (a3xx_gpu->ocmem_hdl) {
> +	if (a3xx_gpu->ocmem.hdl) {
>  		gpu_write(gpu, REG_A3XX_RB_GMEM_BASE_ADDR,
> -			(unsigned int)(a3xx_gpu->ocmem_base >> 14));
> +			(unsigned int)(a3xx_gpu->ocmem.base >> 14));
>  	}
>  
>  	/* Turn on performance counters: */
> @@ -318,10 +314,7 @@ static void a3xx_destroy(struct msm_gpu *gpu)
>  
>  	adreno_gpu_cleanup(adreno_gpu);
>  
> -#ifdef CONFIG_MSM_OCMEM
> -	if (a3xx_gpu->ocmem_base)
> -		ocmem_free(OCMEM_GRAPHICS, a3xx_gpu->ocmem_hdl);
> -#endif
> +	adreno_gpu_ocmem_cleanup(&a3xx_gpu->ocmem);
>  
>  	kfree(a3xx_gpu);
>  }
> @@ -494,17 +487,10 @@ struct msm_gpu *a3xx_gpu_init(struct drm_device *dev)
>  
>  	/* if needed, allocate gmem: */
>  	if (adreno_is_a330(adreno_gpu)) {
> -#ifdef CONFIG_MSM_OCMEM
> -		/* TODO this is different/missing upstream: */
> -		struct ocmem_buf *ocmem_hdl =
> -				ocmem_allocate(OCMEM_GRAPHICS, adreno_gpu->gmem);
> -
> -		a3xx_gpu->ocmem_hdl = ocmem_hdl;
> -		a3xx_gpu->ocmem_base = ocmem_hdl->addr;
> -		adreno_gpu->gmem = ocmem_hdl->len;
> -		DBG("using %dK of OCMEM at 0x%08x", adreno_gpu->gmem / 1024,
> -				a3xx_gpu->ocmem_base);
> -#endif
> +		ret = adreno_gpu_ocmem_init(&adreno_gpu->base.pdev->dev,
> +					    adreno_gpu, &a3xx_gpu->ocmem);
> +		if (ret)
> +			goto fail;
>  	}
>  
>  	if (!gpu->aspace) {
> diff --git a/drivers/gpu/drm/msm/adreno/a3xx_gpu.h b/drivers/gpu/drm/msm/adreno/a3xx_gpu.h
> index 5dc33e5ea53b..c555fb13e0d7 100644
> --- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.h
> +++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.h
> @@ -19,8 +19,7 @@ struct a3xx_gpu {
>  	struct adreno_gpu base;
>  
>  	/* if OCMEM is used for GMEM: */
> -	uint32_t ocmem_base;
> -	void *ocmem_hdl;
> +	struct adreno_ocmem ocmem;
>  };
>  #define to_a3xx_gpu(x) container_of(x, struct a3xx_gpu, base)
>  
> diff --git a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
> index ab2b752566d8..b01388a9e89e 100644
> --- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
> @@ -2,9 +2,6 @@
>  /* Copyright (c) 2014 The Linux Foundation. All rights reserved.
>   */
>  #include "a4xx_gpu.h"
> -#ifdef CONFIG_MSM_OCMEM
> -#  include <soc/qcom/ocmem.h>
> -#endif
>  
>  #define A4XX_INT0_MASK \
>  	(A4XX_INT0_RBBM_AHB_ERROR |        \
> @@ -188,7 +185,7 @@ static int a4xx_hw_init(struct msm_gpu *gpu)
>  			(1 << 30) | 0xFFFF);
>  
>  	gpu_write(gpu, REG_A4XX_RB_GMEM_BASE_ADDR,
> -			(unsigned int)(a4xx_gpu->ocmem_base >> 14));
> +			(unsigned int)(a4xx_gpu->ocmem.base >> 14));
>  
>  	/* Turn on performance counters: */
>  	gpu_write(gpu, REG_A4XX_RBBM_PERFCTR_CTL, 0x01);
> @@ -318,10 +315,7 @@ static void a4xx_destroy(struct msm_gpu *gpu)
>  
>  	adreno_gpu_cleanup(adreno_gpu);
>  
> -#ifdef CONFIG_MSM_OCMEM
> -	if (a4xx_gpu->ocmem_base)
> -		ocmem_free(OCMEM_GRAPHICS, a4xx_gpu->ocmem_hdl);
> -#endif
> +	adreno_gpu_ocmem_cleanup(&a4xx_gpu->ocmem);
>  
>  	kfree(a4xx_gpu);
>  }
> @@ -578,17 +572,10 @@ struct msm_gpu *a4xx_gpu_init(struct drm_device *dev)
>  
>  	/* if needed, allocate gmem: */
>  	if (adreno_is_a4xx(adreno_gpu)) {
> -#ifdef CONFIG_MSM_OCMEM
> -		/* TODO this is different/missing upstream: */
> -		struct ocmem_buf *ocmem_hdl =
> -				ocmem_allocate(OCMEM_GRAPHICS, adreno_gpu->gmem);
> -
> -		a4xx_gpu->ocmem_hdl = ocmem_hdl;
> -		a4xx_gpu->ocmem_base = ocmem_hdl->addr;
> -		adreno_gpu->gmem = ocmem_hdl->len;
> -		DBG("using %dK of OCMEM at 0x%08x", adreno_gpu->gmem / 1024,
> -				a4xx_gpu->ocmem_base);
> -#endif
> +		ret = adreno_gpu_ocmem_init(dev->dev, adreno_gpu,
> +					    &a4xx_gpu->ocmem);
> +		if (ret)
> +			goto fail;
>  	}
>  
>  	if (!gpu->aspace) {
> diff --git a/drivers/gpu/drm/msm/adreno/a4xx_gpu.h b/drivers/gpu/drm/msm/adreno/a4xx_gpu.h
> index d506311ee240..a01448cba2ea 100644
> --- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.h
> +++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.h
> @@ -16,8 +16,7 @@ struct a4xx_gpu {
>  	struct adreno_gpu base;
>  
>  	/* if OCMEM is used for GMEM: */
> -	uint32_t ocmem_base;
> -	void *ocmem_hdl;
> +	struct adreno_ocmem ocmem;
>  };
>  #define to_a4xx_gpu(x) container_of(x, struct a4xx_gpu, base)
>  
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> index 048c8be426f3..0783e4b5486a 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> @@ -14,6 +14,7 @@
>  #include <linux/pm_opp.h>
>  #include <linux/slab.h>
>  #include <linux/soc/qcom/mdt_loader.h>
> +#include <soc/qcom/ocmem.h>
>  #include "adreno_gpu.h"
>  #include "msm_gem.h"
>  #include "msm_mmu.h"
> @@ -893,6 +894,45 @@ static int adreno_get_pwrlevels(struct device *dev,
>  	return 0;
>  }
>  
> +int adreno_gpu_ocmem_init(struct device *dev, struct adreno_gpu *adreno_gpu,
> +			  struct adreno_ocmem *adreno_ocmem)
> +{
> +	struct ocmem_buf *ocmem_hdl;
> +	struct ocmem *ocmem;
> +
> +	ocmem = of_get_ocmem(dev);
> +	if (IS_ERR(ocmem)) {
> +		if (PTR_ERR(ocmem) == -ENODEV) {
> +			/*
> +			 * Return success since either the ocmem property was
> +			 * not specified in device tree, or ocmem support is
> +			 * not compiled into the kernel.
> +			 */
> +			return 0;
> +		}
> +
> +		return PTR_ERR(ocmem);
> +	}
> +
> +	ocmem_hdl = ocmem_allocate(ocmem, OCMEM_GRAPHICS, adreno_gpu->gmem);
> +	if (IS_ERR(ocmem_hdl))
> +		return PTR_ERR(ocmem_hdl);
> +
> +	adreno_ocmem->ocmem = ocmem;
> +	adreno_ocmem->base = ocmem_hdl->addr;
> +	adreno_ocmem->hdl = ocmem_hdl;
> +	adreno_gpu->gmem = ocmem_hdl->len;
> +
> +	return 0;
> +}
> +
> +void adreno_gpu_ocmem_cleanup(struct adreno_ocmem *adreno_ocmem)
> +{
> +	if (adreno_ocmem && adreno_ocmem->base)
> +		ocmem_free(adreno_ocmem->ocmem, OCMEM_GRAPHICS,
> +			   adreno_ocmem->hdl);
> +}
> +
>  int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
>  		struct adreno_gpu *adreno_gpu,
>  		const struct adreno_gpu_funcs *funcs, int nr_rings)
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> index c7441fb8313e..d225a8a92e58 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> @@ -126,6 +126,12 @@ struct adreno_gpu {
>  };
>  #define to_adreno_gpu(x) container_of(x, struct adreno_gpu, base)
>  
> +struct adreno_ocmem {
> +	struct ocmem *ocmem;
> +	unsigned long base;
> +	void *hdl;
> +};
> +
>  /* platform config data (ie. from DT, or pdata) */
>  struct adreno_platform_config {
>  	struct adreno_rev rev;
> @@ -236,6 +242,10 @@ void adreno_dump(struct msm_gpu *gpu);
>  void adreno_wait_ring(struct msm_ringbuffer *ring, uint32_t ndwords);
>  struct msm_ringbuffer *adreno_active_ring(struct msm_gpu *gpu);
>  
> +int adreno_gpu_ocmem_init(struct device *dev, struct adreno_gpu *adreno_gpu,
> +			  struct adreno_ocmem *ocmem);
> +void adreno_gpu_ocmem_cleanup(struct adreno_ocmem *ocmem);
> +
>  int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
>  		struct adreno_gpu *gpu, const struct adreno_gpu_funcs *funcs,
>  		int nr_rings);
> -- 
> 2.21.0
> 
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