A2XX has its own very simple MMU.
Added a msm_use_mmu() function because we can't rely on iommu_present to decide to use MMU or not.
Signed-off-by: Jonathan Marek jonathan@marek.ca --- v2: -tlb flush from cpu every time the page table is updated -keep missing MMU error path, in case MMU init fails -small cleanup in msm_gpu_create_address_space changes -fixed whitespace issue
drivers/gpu/drm/msm/Makefile | 3 +- drivers/gpu/drm/msm/adreno/a2xx_gpu.c | 50 ++++++++- drivers/gpu/drm/msm/adreno/adreno_device.c | 3 + drivers/gpu/drm/msm/adreno/adreno_gpu.c | 3 + drivers/gpu/drm/msm/msm_drv.c | 11 +- drivers/gpu/drm/msm/msm_drv.h | 8 ++ drivers/gpu/drm/msm/msm_gem.c | 4 +- drivers/gpu/drm/msm/msm_gem_vma.c | 23 ++++ drivers/gpu/drm/msm/msm_gpu.c | 31 ++++-- drivers/gpu/drm/msm/msm_gpummu.c | 122 +++++++++++++++++++++ drivers/gpu/drm/msm/msm_mmu.h | 3 + 11 files changed, 241 insertions(+), 20 deletions(-) create mode 100644 drivers/gpu/drm/msm/msm_gpummu.c
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 0170766393ea..004574bc9bd3 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -91,7 +91,8 @@ msm-y := \ msm_perf.o \ msm_rd.o \ msm_ringbuffer.o \ - msm_submitqueue.o + msm_submitqueue.o \ + msm_gpummu.o
msm-$(CONFIG_DEBUG_FS) += adreno/a5xx_debugfs.o \ disp/dpu1/dpu_dbg.o diff --git a/drivers/gpu/drm/msm/adreno/a2xx_gpu.c b/drivers/gpu/drm/msm/adreno/a2xx_gpu.c index 936242f69f08..963dd699cddd 100644 --- a/drivers/gpu/drm/msm/adreno/a2xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a2xx_gpu.c @@ -2,6 +2,8 @@ /* Copyright (c) 2018 The Linux Foundation. All rights reserved. */
#include "a2xx_gpu.h" +#include "msm_gem.h" +#include "msm_mmu.h"
extern bool hang_debug;
@@ -58,9 +60,12 @@ static bool a2xx_me_init(struct msm_gpu *gpu) static int a2xx_hw_init(struct msm_gpu *gpu) { struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); + dma_addr_t pt_base, tran_error; uint32_t *ptr, len; int i, ret;
+ msm_gpummu_params(gpu->aspace->mmu, &pt_base, &tran_error); + DBG("%s", gpu->name);
gpu_write(gpu, REG_A2XX_RBBM_PM_OVERRIDE1, 0xfffffffe); @@ -77,9 +82,34 @@ static int a2xx_hw_init(struct msm_gpu *gpu) /* note: kgsl uses 0x0000ffff for a20x */ gpu_write(gpu, REG_A2XX_RBBM_CNTL, 0x00004442);
- gpu_write(gpu, REG_A2XX_MH_MMU_CONFIG, 0); - gpu_write(gpu, REG_A2XX_MH_MMU_MPU_BASE, 0); + /* MPU: physical range */ + gpu_write(gpu, REG_A2XX_MH_MMU_MPU_BASE, 0x00000000); gpu_write(gpu, REG_A2XX_MH_MMU_MPU_END, 0xfffff000); + + gpu_write(gpu, REG_A2XX_MH_MMU_CONFIG, A2XX_MH_MMU_CONFIG_MMU_ENABLE | + A2XX_MH_MMU_CONFIG_RB_W_CLNT_BEHAVIOR(BEH_TRAN_RNG) | + A2XX_MH_MMU_CONFIG_CP_W_CLNT_BEHAVIOR(BEH_TRAN_RNG) | + A2XX_MH_MMU_CONFIG_CP_R0_CLNT_BEHAVIOR(BEH_TRAN_RNG) | + A2XX_MH_MMU_CONFIG_CP_R1_CLNT_BEHAVIOR(BEH_TRAN_RNG) | + A2XX_MH_MMU_CONFIG_CP_R2_CLNT_BEHAVIOR(BEH_TRAN_RNG) | + A2XX_MH_MMU_CONFIG_CP_R3_CLNT_BEHAVIOR(BEH_TRAN_RNG) | + A2XX_MH_MMU_CONFIG_CP_R4_CLNT_BEHAVIOR(BEH_TRAN_RNG) | + A2XX_MH_MMU_CONFIG_VGT_R0_CLNT_BEHAVIOR(BEH_TRAN_RNG) | + A2XX_MH_MMU_CONFIG_VGT_R1_CLNT_BEHAVIOR(BEH_TRAN_RNG) | + A2XX_MH_MMU_CONFIG_TC_R_CLNT_BEHAVIOR(BEH_TRAN_RNG) | + A2XX_MH_MMU_CONFIG_PA_W_CLNT_BEHAVIOR(BEH_TRAN_RNG)); + + /* same as parameters in adreno_gpu */ + gpu_write(gpu, REG_A2XX_MH_MMU_VA_RANGE, SZ_16M | + A2XX_MH_MMU_VA_RANGE_NUM_64KB_REGIONS(0xfff)); + + gpu_write(gpu, REG_A2XX_MH_MMU_PT_BASE, pt_base); + gpu_write(gpu, REG_A2XX_MH_MMU_TRAN_ERROR, tran_error); + + gpu_write(gpu, REG_A2XX_MH_MMU_INVALIDATE, + A2XX_MH_MMU_INVALIDATE_INVALIDATE_ALL | + A2XX_MH_MMU_INVALIDATE_INVALIDATE_TC); + gpu_write(gpu, REG_A2XX_MH_ARBITER_CONFIG, A2XX_MH_ARBITER_CONFIG_SAME_PAGE_LIMIT(16) | A2XX_MH_ARBITER_CONFIG_L1_ARB_ENABLE | @@ -106,9 +136,21 @@ static int a2xx_hw_init(struct msm_gpu *gpu) /* note: gsl doesn't set this */ gpu_write(gpu, REG_A2XX_RBBM_DEBUG, 0x00080000);
- gpu_write(gpu, REG_A2XX_RBBM_INT_CNTL, 0); - gpu_write(gpu, REG_AXXX_CP_INT_CNTL, 0x80000000); /* RB INT */ + gpu_write(gpu, REG_A2XX_RBBM_INT_CNTL, + A2XX_RBBM_INT_CNTL_RDERR_INT_MASK); + gpu_write(gpu, REG_AXXX_CP_INT_CNTL, + AXXX_CP_INT_CNTL_T0_PACKET_IN_IB_MASK | + AXXX_CP_INT_CNTL_OPCODE_ERROR_MASK | + AXXX_CP_INT_CNTL_PROTECTED_MODE_ERROR_MASK | + AXXX_CP_INT_CNTL_RESERVED_BIT_ERROR_MASK | + AXXX_CP_INT_CNTL_IB_ERROR_MASK | + AXXX_CP_INT_CNTL_IB1_INT_MASK | + AXXX_CP_INT_CNTL_RB_INT_MASK); gpu_write(gpu, REG_A2XX_SQ_INT_CNTL, 0); + gpu_write(gpu, REG_A2XX_MH_INTERRUPT_MASK, + A2XX_MH_INTERRUPT_MASK_AXI_READ_ERROR | + A2XX_MH_INTERRUPT_MASK_AXI_WRITE_ERROR | + A2XX_MH_INTERRUPT_MASK_MMU_PAGE_FAULT);
for (i = 3; i <= 5; i++) if ((SZ_16K << i) == adreno_gpu->gmem) diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c index 6e3f78d4da5d..f651cd51449b 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_device.c +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c @@ -307,6 +307,7 @@ static int adreno_bind(struct device *dev, struct device *master, void *data) static struct adreno_platform_config config = {}; const struct adreno_info *info; struct drm_device *drm = dev_get_drvdata(master); + struct msm_drm_private *priv = drm->dev_private; struct msm_gpu *gpu; int ret;
@@ -337,6 +338,8 @@ static int adreno_bind(struct device *dev, struct device *master, void *data)
dev_set_drvdata(dev, gpu);
+ priv->is_a2xx = config.rev.core == 2; + return 0; }
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index e09671324b05..e7848ab365bc 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -728,6 +728,9 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
adreno_gpu_config.va_start = SZ_16M; adreno_gpu_config.va_end = 0xffffffff; + /* maximum range of a2xx mmu */ + if (adreno_is_a2xx(adreno_gpu)) + adreno_gpu_config.va_end = SZ_16M + 0xfff * SZ_64K;
adreno_gpu_config.nr_rings = nr_rings;
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 3f35e57202ef..5d7304b5f399 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -25,6 +25,7 @@ #include "msm_fence.h" #include "msm_gpu.h" #include "msm_kms.h" +#include "adreno/adreno_gpu.h"
/* @@ -358,6 +359,14 @@ static int get_mdp_ver(struct platform_device *pdev)
#include <linux/of_address.h>
+bool msm_use_mmu(struct drm_device *dev) +{ + struct msm_drm_private *priv = dev->dev_private; + + /* a2xx comes with its own MMU */ + return priv->is_a2xx || iommu_present(&platform_bus_type); +} + static int msm_init_vram(struct drm_device *dev) { struct msm_drm_private *priv = dev->dev_private; @@ -396,7 +405,7 @@ static int msm_init_vram(struct drm_device *dev) * Grab the entire CMA chunk carved out in early startup in * mach-msm: */ - } else if (!iommu_present(&platform_bus_type)) { + } else if (!msm_use_mmu(dev)) { DRM_INFO("using %s VRAM carveout\n", vram); size = memparse(vram, NULL); } diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 9d11f321f5a9..99a37962e92b 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -179,6 +179,8 @@ struct msm_drm_private { /* when we have more than one 'msm_gpu' these need to be an array: */ struct msm_gpu *gpu; struct msm_file_private *lastctx; + /* gpu is only set on open(), but we need this info earlier */ + bool is_a2xx;
struct drm_fb_helper *fbdev;
@@ -252,9 +254,15 @@ struct msm_gem_address_space * msm_gem_address_space_create(struct device *dev, struct iommu_domain *domain, const char *name);
+struct msm_gem_address_space * +msm_gem_address_space_create_a2xx(struct device *dev, struct msm_gpu *gpu, + const char *name, uint64_t va_start, uint64_t va_end); + int msm_register_mmu(struct drm_device *dev, struct msm_mmu *mmu); void msm_unregister_mmu(struct drm_device *dev, struct msm_mmu *mmu);
+bool msm_use_mmu(struct drm_device *dev); + void msm_gem_submit_free(struct msm_gem_submit *submit); int msm_ioctl_gem_submit(struct drm_device *dev, void *data, struct drm_file *file); diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c index 6657453a3a58..c1ef8780f686 100644 --- a/drivers/gpu/drm/msm/msm_gem.c +++ b/drivers/gpu/drm/msm/msm_gem.c @@ -912,7 +912,7 @@ static struct drm_gem_object *_msm_gem_new(struct drm_device *dev,
size = PAGE_ALIGN(size);
- if (!iommu_present(&platform_bus_type)) + if (!msm_use_mmu(dev)) use_vram = true; else if ((flags & (MSM_BO_STOLEN | MSM_BO_SCANOUT)) && priv->vram.size) use_vram = true; @@ -991,7 +991,7 @@ struct drm_gem_object *msm_gem_import(struct drm_device *dev, int ret, npages;
/* if we don't have IOMMU, don't bother pretending we can import: */ - if (!iommu_present(&platform_bus_type)) { + if (!msm_use_mmu(dev)) { dev_err(dev->dev, "cannot import without IOMMU\n"); return ERR_PTR(-EINVAL); } diff --git a/drivers/gpu/drm/msm/msm_gem_vma.c b/drivers/gpu/drm/msm/msm_gem_vma.c index ffbec224551b..8075fd699803 100644 --- a/drivers/gpu/drm/msm/msm_gem_vma.c +++ b/drivers/gpu/drm/msm/msm_gem_vma.c @@ -114,3 +114,26 @@ msm_gem_address_space_create(struct device *dev, struct iommu_domain *domain,
return aspace; } + +struct msm_gem_address_space * +msm_gem_address_space_create_a2xx(struct device *dev, struct msm_gpu *gpu, + const char *name, uint64_t va_start, uint64_t va_end) +{ + struct msm_gem_address_space *aspace; + u64 size = va_end - va_start; + + aspace = kzalloc(sizeof(*aspace), GFP_KERNEL); + if (!aspace) + return ERR_PTR(-ENOMEM); + + spin_lock_init(&aspace->lock); + aspace->name = name; + aspace->mmu = msm_gpummu_new(dev, gpu); + + drm_mm_init(&aspace->mm, (va_start >> PAGE_SHIFT), + size >> PAGE_SHIFT); + + kref_init(&aspace->kref); + + return aspace; +} diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index 11aac8337066..0e08ac8160d2 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -19,6 +19,7 @@ #include "msm_gem.h" #include "msm_mmu.h" #include "msm_fence.h" +#include "adreno/adreno_gpu.h"
#include <generated/utsrelease.h> #include <linux/string_helpers.h> @@ -800,7 +801,6 @@ static struct msm_gem_address_space * msm_gpu_create_address_space(struct msm_gpu *gpu, struct platform_device *pdev, uint64_t va_start, uint64_t va_end) { - struct iommu_domain *iommu; struct msm_gem_address_space *aspace; int ret;
@@ -809,20 +809,27 @@ msm_gpu_create_address_space(struct msm_gpu *gpu, struct platform_device *pdev, * and have separate page tables per context. For now, to keep things * simple and to get something working, just use a single address space: */ - iommu = iommu_domain_alloc(&platform_bus_type); - if (!iommu) - return NULL; - - iommu->geometry.aperture_start = va_start; - iommu->geometry.aperture_end = va_end; - - dev_info(gpu->dev->dev, "%s: using IOMMU\n", gpu->name); + if (!adreno_is_a2xx(to_adreno_gpu(gpu))) { + struct iommu_domain *iommu = iommu_domain_alloc(&platform_bus_type); + if (!iommu) + return NULL; + + iommu->geometry.aperture_start = va_start; + iommu->geometry.aperture_end = va_end; + + dev_info(gpu->dev->dev, "%s: using IOMMU\n", gpu->name); + + aspace = msm_gem_address_space_create(&pdev->dev, iommu, "gpu"); + if (IS_ERR(aspace)) + iommu_domain_free(iommu); + } else { + aspace = msm_gem_address_space_create_a2xx(&pdev->dev, gpu, "gpu", + va_start, va_end); + }
- aspace = msm_gem_address_space_create(&pdev->dev, iommu, "gpu"); if (IS_ERR(aspace)) { - dev_err(gpu->dev->dev, "failed to init iommu: %ld\n", + dev_err(gpu->dev->dev, "failed to init mmu: %ld\n", PTR_ERR(aspace)); - iommu_domain_free(iommu); return ERR_CAST(aspace); }
diff --git a/drivers/gpu/drm/msm/msm_gpummu.c b/drivers/gpu/drm/msm/msm_gpummu.c new file mode 100644 index 000000000000..a04a64faa8a1 --- /dev/null +++ b/drivers/gpu/drm/msm/msm_gpummu.c @@ -0,0 +1,122 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2018 The Linux Foundation. All rights reserved. */ + +#include "msm_drv.h" +#include "msm_mmu.h" +#include "adreno/adreno_gpu.h" +#include "adreno/a2xx.xml.h" + +struct msm_gpummu { + struct msm_mmu base; + struct msm_gpu *gpu; + dma_addr_t pt_base; + uint32_t *table; +}; +#define to_msm_gpummu(x) container_of(x, struct msm_gpummu, base) + +#define VA_START SZ_16M +#define VA_RANGE (0xfff * SZ_64K) +#define MMU_PAGE_SIZE SZ_4K +#define TABLE_SIZE (sizeof(uint32_t) * VA_RANGE / MMU_PAGE_SIZE) + +static int msm_gpummu_attach(struct msm_mmu *mmu, const char * const *names, + int cnt) +{ + return 0; +} + +static void msm_gpummu_detach(struct msm_mmu *mmu, const char * const *names, + int cnt) +{ +} + +static void update_pt(struct msm_mmu *mmu, uint64_t iova, + struct sg_table *sgt, unsigned len, unsigned prot) +{ + struct msm_gpummu *gpummu = to_msm_gpummu(mmu); + unsigned idx = (iova - VA_START) / MMU_PAGE_SIZE; + struct scatterlist *sg; + unsigned i, j; + + for_each_sg(sgt->sgl, sg, sgt->nents, i) { + dma_addr_t addr = sg->dma_address; + for (j = 0; j < sg->length / MMU_PAGE_SIZE; j++, idx++) { + gpummu->table[idx] = prot ? addr | prot : 0; + addr += MMU_PAGE_SIZE; + } + } + + /* flush the tlb everytime the page table is updated + * we can probably do something smarter + */ + gpu_write(gpummu->gpu, REG_A2XX_MH_MMU_INVALIDATE, + A2XX_MH_MMU_INVALIDATE_INVALIDATE_ALL | + A2XX_MH_MMU_INVALIDATE_INVALIDATE_TC); +} + +static int msm_gpummu_map(struct msm_mmu *mmu, uint64_t iova, + struct sg_table *sgt, unsigned len, int prot) +{ + unsigned prot_bits = 0; + if (prot & IOMMU_WRITE) + prot_bits |= 1; + if (prot & IOMMU_READ) + prot_bits |= 2; + update_pt(mmu, iova, sgt, len, prot_bits); + return 0; +} + +static int msm_gpummu_unmap(struct msm_mmu *mmu, uint64_t iova, + struct sg_table *sgt, unsigned len) +{ + update_pt(mmu, iova, sgt, len, 0); + return 0; +} + +static void msm_gpummu_destroy(struct msm_mmu *mmu) +{ + struct msm_gpummu *gpummu = to_msm_gpummu(mmu); + + dma_free_attrs(mmu->dev, TABLE_SIZE, gpummu->table, gpummu->pt_base, + DMA_ATTR_FORCE_CONTIGUOUS); + + kfree(gpummu); +} + +static const struct msm_mmu_funcs funcs = { + .attach = msm_gpummu_attach, + .detach = msm_gpummu_detach, + .map = msm_gpummu_map, + .unmap = msm_gpummu_unmap, + .destroy = msm_gpummu_destroy, +}; + +struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu) +{ + struct msm_gpummu *gpummu; + + gpummu = kzalloc(sizeof(*gpummu), GFP_KERNEL); + if (!gpummu) + return ERR_PTR(-ENOMEM); + + gpummu->table = dma_alloc_attrs(dev, TABLE_SIZE + 32, &gpummu->pt_base, + GFP_KERNEL | __GFP_ZERO, DMA_ATTR_FORCE_CONTIGUOUS); + if (!gpummu->table) { + kfree(gpummu); + return ERR_PTR(-ENOMEM); + } + + gpummu->gpu = gpu; + msm_mmu_init(&gpummu->base, dev, &funcs); + + return &gpummu->base; +} + +void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base, + dma_addr_t *tran_error) +{ + dma_addr_t base = to_msm_gpummu(mmu)->pt_base; + + *pt_base = base; + *tran_error = base + TABLE_SIZE; /* 32-byte aligned */ +} diff --git a/drivers/gpu/drm/msm/msm_mmu.h b/drivers/gpu/drm/msm/msm_mmu.h index aa2c5d4580c8..c5bbb49dc1be 100644 --- a/drivers/gpu/drm/msm/msm_mmu.h +++ b/drivers/gpu/drm/msm/msm_mmu.h @@ -54,4 +54,7 @@ static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg, mmu->handler = handler; }
+void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base, + dma_addr_t *tran_error); + #endif /* __MSM_MMU_H__ */