thead-kernel/drivers/gpu/drm/img-rogue/osfunc_arm.c

/*************************************************************************/ /*!
@File
@Title          arm specific OS functions
@Copyright      Copyright (c) Imagination Technologies Ltd. All Rights Reserved
@Description    Processor specific OS functions
@License        Dual MIT/GPLv2

The contents of this file are subject to the MIT license as set out below.

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of this software and associated documentation files (the "Software"), to deal
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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the GNU General Public License Version 2 ("GPL") in which case the provisions
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not delete the provisions above, a recipient may use your version of this file
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"MIT-COPYING".

EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS
PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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*/ /**************************************************************************/
#include <linux/version.h>
#include <linux/dma-mapping.h>
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,15,0))
 #include <asm/system.h>
#endif
#include <asm/cacheflush.h>

#include "pvrsrv_error.h"
#include "img_types.h"
#include "img_defs.h"
#include "osfunc.h"
#include "pvr_debug.h"


static inline size_t pvr_dmac_range_len(const void *pvStart, const void *pvEnd)
{
	return (size_t)((char *)pvEnd - (char *)pvStart);
}

void OSCPUCacheFlushRangeKM(PVRSRV_DEVICE_NODE *psDevNode,
                            void *pvVirtStart,
                            void *pvVirtEnd,
                            IMG_CPU_PHYADDR sCPUPhysStart,
                            IMG_CPU_PHYADDR sCPUPhysEnd)
{
	PVR_UNREFERENCED_PARAMETER(psDevNode);

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0))
	arm_dma_ops.sync_single_for_device(psDevNode->psDevConfig->pvOSDevice, sCPUPhysStart.uiAddr, sCPUPhysEnd.uiAddr - sCPUPhysStart.uiAddr, DMA_TO_DEVICE);
	arm_dma_ops.sync_single_for_cpu(psDevNode->psDevConfig->pvOSDevice, sCPUPhysStart.uiAddr, sCPUPhysEnd.uiAddr - sCPUPhysStart.uiAddr, DMA_FROM_DEVICE);
#else	/* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0)) */
	/* Inner cache */
	dmac_flush_range(pvVirtStart, pvVirtEnd);

	/* Outer cache */
	outer_flush_range(sCPUPhysStart.uiAddr, sCPUPhysEnd.uiAddr);
#endif	/* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0)) */
}

void OSCPUCacheCleanRangeKM(PVRSRV_DEVICE_NODE *psDevNode,
                            void *pvVirtStart,
                            void *pvVirtEnd,
                            IMG_CPU_PHYADDR sCPUPhysStart,
                            IMG_CPU_PHYADDR sCPUPhysEnd)
{
	PVR_UNREFERENCED_PARAMETER(psDevNode);

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0))
	arm_dma_ops.sync_single_for_device(psDevNode->psDevConfig->pvOSDevice, sCPUPhysStart.uiAddr, sCPUPhysEnd.uiAddr - sCPUPhysStart.uiAddr, DMA_TO_DEVICE);
#else	/* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0)) */
	/* Inner cache */
	dmac_map_area(pvVirtStart, pvr_dmac_range_len(pvVirtStart, pvVirtEnd), DMA_TO_DEVICE);

	/* Outer cache */
	outer_clean_range(sCPUPhysStart.uiAddr, sCPUPhysEnd.uiAddr);
#endif	/* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0)) */
}

void OSCPUCacheInvalidateRangeKM(PVRSRV_DEVICE_NODE *psDevNode,
                                 void *pvVirtStart,
                                 void *pvVirtEnd,
                                 IMG_CPU_PHYADDR sCPUPhysStart,
                                 IMG_CPU_PHYADDR sCPUPhysEnd)
{
	PVR_UNREFERENCED_PARAMETER(psDevNode);

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0))
	arm_dma_ops.sync_single_for_cpu(psDevNode->psDevConfig->pvOSDevice, sCPUPhysStart.uiAddr, sCPUPhysEnd.uiAddr - sCPUPhysStart.uiAddr, DMA_FROM_DEVICE);
#else	/* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0)) */
	/* Inner cache */
	dmac_map_area(pvVirtStart, pvr_dmac_range_len(pvVirtStart, pvVirtEnd), DMA_FROM_DEVICE);

	/* Outer cache */
	outer_inv_range(sCPUPhysStart.uiAddr, sCPUPhysEnd.uiAddr);
#endif	/* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0)) */
}

OS_CACHE_OP_ADDR_TYPE OSCPUCacheOpAddressType(void)
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0))
	return OS_CACHE_OP_ADDR_TYPE_PHYSICAL;
#else
	return OS_CACHE_OP_ADDR_TYPE_BOTH;
#endif
}

/* User Enable Register */
#define PMUSERENR_EN      0x00000001 /* enable user access to the counters */

static void per_cpu_perf_counter_user_access_en(void *data)
{
	PVR_UNREFERENCED_PARAMETER(data);
	/* Enable user-mode access to counters. */
	asm volatile("mcr p15, 0, %0, c9, c14, 0" :: "r"(PMUSERENR_EN));
}

void OSUserModeAccessToPerfCountersEn(void)
{
	on_each_cpu(per_cpu_perf_counter_user_access_en, NULL, 1);
}

IMG_BOOL OSIsWriteCombineUnalignedSafe(void)
{
	/*
	 * The kernel looks to have always used normal memory under ARM32.
	 * See osfunc_arm64.c implementation for more details.
	 */
	return IMG_TRUE;
}