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Message-Id: <20200421234127.27965-4-jonathan@marek.ca>
Date: Tue, 21 Apr 2020 19:41:21 -0400
From: Jonathan Marek <jonathan@...ek.ca>
To: freedreno@...ts.freedesktop.org
Cc: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Jordan Crouse <jcrouse@...eaurora.org>,
Sharat Masetty <smasetty@...eaurora.org>,
"Michael J. Ruhl" <michael.j.ruhl@...el.com>,
linux-arm-msm@...r.kernel.org (open list:DRM DRIVER FOR MSM ADRENO GPU),
dri-devel@...ts.freedesktop.org (open list:DRM DRIVER FOR MSM ADRENO
GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 3/9] drm/msm/a6xx: use msm_gem for GMU memory objects
This gives more fine-grained control over how memory is allocated over the
DMA api. In particular, it allows using an address range or pinning to
a fixed address.
Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
---
drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 115 ++++++++++++++++++--------
drivers/gpu/drm/msm/adreno/a6xx_gmu.h | 9 +-
drivers/gpu/drm/msm/adreno/a6xx_hfi.c | 6 +-
3 files changed, 88 insertions(+), 42 deletions(-)
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index c4e71abbdd53..c9fd0470a321 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -2,14 +2,16 @@
/* Copyright (c) 2017-2019 The Linux Foundation. All rights reserved. */
#include <linux/clk.h>
-#include <linux/dma-mapping.h>
#include <linux/interconnect.h>
#include <linux/pm_domain.h>
#include <linux/pm_opp.h>
#include <soc/qcom/cmd-db.h>
+#include <drm/drm_gem.h>
#include "a6xx_gpu.h"
#include "a6xx_gmu.xml.h"
+#include "msm_gem.h"
+#include "msm_mmu.h"
static void a6xx_gmu_fault(struct a6xx_gmu *gmu)
{
@@ -620,7 +622,7 @@ static int a6xx_gmu_fw_start(struct a6xx_gmu *gmu, unsigned int state)
gmu_write(gmu, REG_A6XX_GMU_CM3_BOOT_CONFIG, 0x02);
/* Write the iova of the HFI table */
- gmu_write(gmu, REG_A6XX_GMU_HFI_QTBL_ADDR, gmu->hfi->iova);
+ gmu_write(gmu, REG_A6XX_GMU_HFI_QTBL_ADDR, gmu->hfi.iova);
gmu_write(gmu, REG_A6XX_GMU_HFI_QTBL_INFO, 1);
gmu_write(gmu, REG_A6XX_GMU_AHB_FENCE_RANGE_0,
@@ -919,34 +921,77 @@ int a6xx_gmu_stop(struct a6xx_gpu *a6xx_gpu)
return 0;
}
-static void a6xx_gmu_memory_free(struct a6xx_gmu *gmu, struct a6xx_gmu_bo *bo)
+static void a6xx_gmu_memory_free(struct a6xx_gmu *gmu)
{
- if (IS_ERR_OR_NULL(bo))
- return;
+ msm_gem_kernel_put(gmu->hfi.obj, gmu->aspace, false);
+ msm_gem_kernel_put(gmu->debug.obj, gmu->aspace, false);
+
+ gmu->aspace->mmu->funcs->detach(gmu->aspace->mmu);
+ msm_gem_address_space_put(gmu->aspace);
+}
+
+static int a6xx_gmu_memory_alloc(struct a6xx_gmu *gmu, struct a6xx_gmu_bo *bo,
+ size_t size, u64 iova)
+{
+ struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
+ struct drm_device *dev = a6xx_gpu->base.base.dev;
+ uint32_t flags = MSM_BO_WC;
+ u64 range_start, range_end;
+ int ret;
+
+ size = PAGE_ALIGN(size);
+ if (!iova) {
+ /* no fixed address - use GMU's uncached range */
+ range_start = 0x60000000;
+ range_end = 0x80000000;
+ } else {
+ /* range for fixed address */
+ range_start = iova;
+ range_end = iova + size;
+ }
+
+ bo->obj = msm_gem_new(dev, size, flags);
+ if (IS_ERR(bo->obj))
+ return PTR_ERR(bo->obj);
- dma_free_wc(gmu->dev, bo->size, bo->virt, bo->iova);
- kfree(bo);
+ ret = msm_gem_get_and_pin_iova_range(bo->obj, gmu->aspace, &bo->iova,
+ range_start >> PAGE_SHIFT, range_end >> PAGE_SHIFT);
+ if (ret) {
+ drm_gem_object_put(bo->obj);
+ return ret;
+ }
+
+ bo->virt = msm_gem_get_vaddr(bo->obj);
+ bo->size = size;
+
+ return 0;
}
-static struct a6xx_gmu_bo *a6xx_gmu_memory_alloc(struct a6xx_gmu *gmu,
- size_t size)
+static int a6xx_gmu_memory_probe(struct a6xx_gmu *gmu)
{
- struct a6xx_gmu_bo *bo;
+ struct iommu_domain *domain;
+ int ret;
- bo = kzalloc(sizeof(*bo), GFP_KERNEL);
- if (!bo)
- return ERR_PTR(-ENOMEM);
+ domain = iommu_domain_alloc(&platform_bus_type);
+ if (!domain)
+ return -ENODEV;
- bo->size = PAGE_ALIGN(size);
+ domain->geometry.aperture_start = 0x00000000;
+ domain->geometry.aperture_end = 0x7fffffff;
- bo->virt = dma_alloc_wc(gmu->dev, bo->size, &bo->iova, GFP_KERNEL);
+ gmu->aspace = msm_gem_address_space_create(gmu->dev, domain, "gmu");
+ if (IS_ERR(gmu->aspace)) {
+ iommu_domain_free(domain);
+ return PTR_ERR(gmu->aspace);
+ }
- if (!bo->virt) {
- kfree(bo);
- return ERR_PTR(-ENOMEM);
+ ret = gmu->aspace->mmu->funcs->attach(gmu->aspace->mmu);
+ if (ret) {
+ msm_gem_address_space_put(gmu->aspace);
+ return ret;
}
- return bo;
+ return 0;
}
/* Return the 'arc-level' for the given frequency */
@@ -1204,7 +1249,7 @@ void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu)
iounmap(gmu->mmio);
gmu->mmio = NULL;
- a6xx_gmu_memory_free(gmu, gmu->hfi);
+ a6xx_gmu_memory_free(gmu);
free_irq(gmu->gmu_irq, gmu);
free_irq(gmu->hfi_irq, gmu);
@@ -1226,15 +1271,7 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
gmu->dev = &pdev->dev;
- /* Pass force_dma false to require the DT to set the dma region */
- ret = of_dma_configure(gmu->dev, node, false);
- if (ret)
- return ret;
-
- /* Set the mask after the of_dma_configure() */
- ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(31));
- if (ret)
- return ret;
+ of_dma_configure(gmu->dev, node, true);
/* Fow now, don't do anything fancy until we get our feet under us */
gmu->idle_level = GMU_IDLE_STATE_ACTIVE;
@@ -1246,20 +1283,26 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
if (ret)
goto err_put_device;
+ ret = a6xx_gmu_memory_probe(gmu);
+ if (ret)
+ goto err_put_device;
+
/* Allocate memory for for the HFI queues */
- gmu->hfi = a6xx_gmu_memory_alloc(gmu, SZ_16K);
- if (IS_ERR(gmu->hfi))
+ ret = a6xx_gmu_memory_alloc(gmu, &gmu->hfi, SZ_16K, 0);
+ if (ret)
goto err_memory;
/* Allocate memory for the GMU debug region */
- gmu->debug = a6xx_gmu_memory_alloc(gmu, SZ_16K);
- if (IS_ERR(gmu->debug))
+ ret = a6xx_gmu_memory_alloc(gmu, &gmu->debug, SZ_16K, 0);
+ if (ret)
goto err_memory;
/* Map the GMU registers */
gmu->mmio = a6xx_gmu_get_mmio(pdev, "gmu");
- if (IS_ERR(gmu->mmio))
+ if (IS_ERR(gmu->mmio)) {
+ ret = PTR_ERR(gmu->mmio);
goto err_memory;
+ }
/* Get the HFI and GMU interrupts */
gmu->hfi_irq = a6xx_gmu_get_irq(gmu, pdev, "hfi", a6xx_hfi_irq);
@@ -1288,11 +1331,11 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
iounmap(gmu->mmio);
free_irq(gmu->gmu_irq, gmu);
free_irq(gmu->hfi_irq, gmu);
-err_memory:
- a6xx_gmu_memory_free(gmu, gmu->hfi);
ret = -ENODEV;
+err_memory:
+ a6xx_gmu_memory_free(gmu);
err_put_device:
/* Drop reference taken in of_find_device_by_node */
put_device(gmu->dev);
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
index 4af65a36d5ca..cd66a5e1d7e9 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
@@ -10,9 +10,10 @@
#include "a6xx_hfi.h"
struct a6xx_gmu_bo {
+ struct drm_gem_object *obj;
void *virt;
size_t size;
- dma_addr_t iova;
+ u64 iova;
};
/*
@@ -43,6 +44,8 @@ struct a6xx_gmu_bo {
struct a6xx_gmu {
struct device *dev;
+ struct msm_gem_address_space *aspace;
+
void * __iomem mmio;
int hfi_irq;
@@ -52,8 +55,8 @@ struct a6xx_gmu {
int idle_level;
- struct a6xx_gmu_bo *hfi;
- struct a6xx_gmu_bo *debug;
+ struct a6xx_gmu_bo hfi;
+ struct a6xx_gmu_bo debug;
int nr_clocks;
struct clk_bulk_data *clocks;
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_hfi.c b/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
index e450e0b97211..b90343d4caf0 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
@@ -176,8 +176,8 @@ static int a6xx_hfi_send_gmu_init(struct a6xx_gmu *gmu, int boot_state)
{
struct a6xx_hfi_msg_gmu_init_cmd msg = { 0 };
- msg.dbg_buffer_addr = (u32) gmu->debug->iova;
- msg.dbg_buffer_size = (u32) gmu->debug->size;
+ msg.dbg_buffer_addr = (u32) gmu->debug.iova;
+ msg.dbg_buffer_size = (u32) gmu->debug.size;
msg.boot_state = boot_state;
return a6xx_hfi_send_msg(gmu, HFI_H2F_MSG_INIT, &msg, sizeof(msg),
@@ -385,7 +385,7 @@ static void a6xx_hfi_queue_init(struct a6xx_hfi_queue *queue,
void a6xx_hfi_init(struct a6xx_gmu *gmu)
{
- struct a6xx_gmu_bo *hfi = gmu->hfi;
+ struct a6xx_gmu_bo *hfi = &gmu->hfi;
struct a6xx_hfi_queue_table_header *table = hfi->virt;
struct a6xx_hfi_queue_header *headers = hfi->virt + sizeof(*table);
u64 offset;
--
2.26.1
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