diff options
author | Vinod Koul <vinod.koul@intel.com> | 2016-10-03 09:35:55 +0530 |
---|---|---|
committer | Vinod Koul <vinod.koul@intel.com> | 2016-10-03 09:35:55 +0530 |
commit | f2469114c66158b36143a091255b4ed2d61fab7c (patch) | |
tree | 82c88ef794cbad8e425ac17674c29d2a243e9bc8 | |
parent | 709c9464c335e1f8e22ee108def77d53330a95c7 (diff) | |
parent | 4d8673a0494a0f20bead7aea7dc5906c74451554 (diff) | |
download | linux-stable-f2469114c66158b36143a091255b4ed2d61fab7c.tar.gz linux-stable-f2469114c66158b36143a091255b4ed2d61fab7c.tar.bz2 linux-stable-f2469114c66158b36143a091255b4ed2d61fab7c.zip |
Merge branch 'topic/ste_dma40' into for-linus
-rw-r--r-- | drivers/dma/ste_dma40.c | 253 |
1 files changed, 122 insertions, 131 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index 08f3d7be2df0..8684d11b29bb 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -874,7 +874,7 @@ static void d40_log_lli_to_lcxa(struct d40_chan *chan, struct d40_desc *desc) } if (curr_lcla < 0) - goto out; + goto set_current; for (; lli_current < lli_len; lli_current++) { unsigned int lcla_offset = chan->phy_chan->num * 1024 + @@ -925,8 +925,7 @@ static void d40_log_lli_to_lcxa(struct d40_chan *chan, struct d40_desc *desc) break; } } - -out: + set_current: desc->lli_current = lli_current; } @@ -1057,7 +1056,7 @@ static int __d40_execute_command_phy(struct d40_chan *d40c, D40_CHAN_POS(d40c->phy_chan->num); if (status == D40_DMA_SUSPENDED || status == D40_DMA_STOP) - goto done; + goto unlock; } wmask = 0xffffffff & ~(D40_CHAN_POS_MASK(d40c->phy_chan->num)); @@ -1093,7 +1092,7 @@ static int __d40_execute_command_phy(struct d40_chan *d40c, } } -done: + unlock: spin_unlock_irqrestore(&d40c->base->execmd_lock, flags); return ret; } @@ -1580,7 +1579,7 @@ static void dma_tasklet(unsigned long data) /* Check if we have reached here for cyclic job */ d40d = d40_first_active_get(d40c); if (d40d == NULL || !d40d->cyclic) - goto err; + goto check_pending_tx; } if (!d40d->cyclic) @@ -1622,8 +1621,7 @@ static void dma_tasklet(unsigned long data) dmaengine_desc_callback_invoke(&cb, NULL); return; - -err: + check_pending_tx: /* Rescue manouver if receiving double interrupts */ if (d40c->pending_tx > 0) d40c->pending_tx--; @@ -1752,42 +1750,40 @@ static bool d40_alloc_mask_set(struct d40_phy_res *phy, phy->allocated_dst == D40_ALLOC_FREE) { phy->allocated_dst = D40_ALLOC_PHY; phy->allocated_src = D40_ALLOC_PHY; - goto found; + goto found_unlock; } else - goto not_found; + goto not_found_unlock; } /* Logical channel */ if (is_src) { if (phy->allocated_src == D40_ALLOC_PHY) - goto not_found; + goto not_found_unlock; if (phy->allocated_src == D40_ALLOC_FREE) phy->allocated_src = D40_ALLOC_LOG_FREE; if (!(phy->allocated_src & BIT(log_event_line))) { phy->allocated_src |= BIT(log_event_line); - goto found; + goto found_unlock; } else - goto not_found; + goto not_found_unlock; } else { if (phy->allocated_dst == D40_ALLOC_PHY) - goto not_found; + goto not_found_unlock; if (phy->allocated_dst == D40_ALLOC_FREE) phy->allocated_dst = D40_ALLOC_LOG_FREE; if (!(phy->allocated_dst & BIT(log_event_line))) { phy->allocated_dst |= BIT(log_event_line); - goto found; - } else - goto not_found; + goto found_unlock; + } } - -not_found: + not_found_unlock: spin_unlock_irqrestore(&phy->lock, flags); return false; -found: + found_unlock: spin_unlock_irqrestore(&phy->lock, flags); return true; } @@ -1803,7 +1799,7 @@ static bool d40_alloc_mask_free(struct d40_phy_res *phy, bool is_src, phy->allocated_dst = D40_ALLOC_FREE; phy->allocated_src = D40_ALLOC_FREE; is_free = true; - goto out; + goto unlock; } /* Logical channel */ @@ -1819,8 +1815,7 @@ static bool d40_alloc_mask_free(struct d40_phy_res *phy, bool is_src, is_free = ((phy->allocated_src | phy->allocated_dst) == D40_ALLOC_FREE); - -out: + unlock: spin_unlock_irqrestore(&phy->lock, flags); return is_free; @@ -2019,7 +2014,7 @@ static int d40_free_dma(struct d40_chan *d40c) res = d40_channel_execute_command(d40c, D40_DMA_STOP); if (res) { chan_err(d40c, "stop failed\n"); - goto out; + goto mark_last_busy; } d40_alloc_mask_free(phy, is_src, chan_is_logical(d40c) ? event : 0); @@ -2037,8 +2032,7 @@ static int d40_free_dma(struct d40_chan *d40c) d40c->busy = false; d40c->phy_chan = NULL; d40c->configured = false; -out: - + mark_last_busy: pm_runtime_mark_last_busy(d40c->base->dev); pm_runtime_put_autosuspend(d40c->base->dev); return res; @@ -2066,8 +2060,7 @@ static bool d40_is_paused(struct d40_chan *d40c) D40_CHAN_POS(d40c->phy_chan->num); if (status == D40_DMA_SUSPENDED || status == D40_DMA_STOP) is_paused = true; - - goto _exit; + goto unlock; } if (d40c->dma_cfg.dir == DMA_MEM_TO_DEV || @@ -2077,7 +2070,7 @@ static bool d40_is_paused(struct d40_chan *d40c) status = readl(chanbase + D40_CHAN_REG_SSLNK); } else { chan_err(d40c, "Unknown direction\n"); - goto _exit; + goto unlock; } status = (status & D40_EVENTLINE_MASK(event)) >> @@ -2085,7 +2078,7 @@ static bool d40_is_paused(struct d40_chan *d40c) if (status != D40_DMA_RUN) is_paused = true; -_exit: + unlock: spin_unlock_irqrestore(&d40c->lock, flags); return is_paused; @@ -2170,7 +2163,7 @@ static struct d40_desc * d40_prep_desc(struct d40_chan *chan, struct scatterlist *sg, unsigned int sg_len, unsigned long dma_flags) { - struct stedma40_chan_cfg *cfg = &chan->dma_cfg; + struct stedma40_chan_cfg *cfg; struct d40_desc *desc; int ret; @@ -2178,17 +2171,18 @@ d40_prep_desc(struct d40_chan *chan, struct scatterlist *sg, if (!desc) return NULL; + cfg = &chan->dma_cfg; desc->lli_len = d40_sg_2_dmalen(sg, sg_len, cfg->src_info.data_width, cfg->dst_info.data_width); if (desc->lli_len < 0) { chan_err(chan, "Unaligned size\n"); - goto err; + goto free_desc; } ret = d40_pool_lli_alloc(chan, desc, desc->lli_len); if (ret < 0) { chan_err(chan, "Could not allocate lli\n"); - goto err; + goto free_desc; } desc->lli_current = 0; @@ -2198,8 +2192,7 @@ d40_prep_desc(struct d40_chan *chan, struct scatterlist *sg, dma_async_tx_descriptor_init(&desc->txd, &chan->chan); return desc; - -err: + free_desc: d40_desc_free(chan, desc); return NULL; } @@ -2210,8 +2203,8 @@ d40_prep_sg(struct dma_chan *dchan, struct scatterlist *sg_src, enum dma_transfer_direction direction, unsigned long dma_flags) { struct d40_chan *chan = container_of(dchan, struct d40_chan, chan); - dma_addr_t src_dev_addr = 0; - dma_addr_t dst_dev_addr = 0; + dma_addr_t src_dev_addr; + dma_addr_t dst_dev_addr; struct d40_desc *desc; unsigned long flags; int ret; @@ -2225,11 +2218,13 @@ d40_prep_sg(struct dma_chan *dchan, struct scatterlist *sg_src, desc = d40_prep_desc(chan, sg_src, sg_len, dma_flags); if (desc == NULL) - goto err; + goto unlock; if (sg_next(&sg_src[sg_len - 1]) == sg_src) desc->cyclic = true; + src_dev_addr = 0; + dst_dev_addr = 0; if (direction == DMA_DEV_TO_MEM) src_dev_addr = chan->runtime_addr; else if (direction == DMA_MEM_TO_DEV) @@ -2245,7 +2240,7 @@ d40_prep_sg(struct dma_chan *dchan, struct scatterlist *sg_src, if (ret) { chan_err(chan, "Failed to prepare %s sg job: %d\n", chan_is_logical(chan) ? "log" : "phy", ret); - goto err; + goto free_desc; } /* @@ -2257,10 +2252,9 @@ d40_prep_sg(struct dma_chan *dchan, struct scatterlist *sg_src, spin_unlock_irqrestore(&chan->lock, flags); return &desc->txd; - -err: - if (desc) - d40_desc_free(chan, desc); + free_desc: + d40_desc_free(chan, desc); + unlock: spin_unlock_irqrestore(&chan->lock, flags); return NULL; } @@ -2398,7 +2392,7 @@ static int d40_alloc_chan_resources(struct dma_chan *chan) err = d40_config_memcpy(d40c); if (err) { chan_err(d40c, "Failed to configure memcpy channel\n"); - goto fail; + goto mark_last_busy; } } @@ -2406,7 +2400,7 @@ static int d40_alloc_chan_resources(struct dma_chan *chan) if (err) { chan_err(d40c, "Failed to allocate channel\n"); d40c->configured = false; - goto fail; + goto mark_last_busy; } pm_runtime_get_sync(d40c->base->dev); @@ -2440,7 +2434,7 @@ static int d40_alloc_chan_resources(struct dma_chan *chan) */ if (is_free_phy) d40_config_write(d40c); -fail: + mark_last_busy: pm_runtime_mark_last_busy(d40c->base->dev); pm_runtime_put_autosuspend(d40c->base->dev); spin_unlock_irqrestore(&d40c->lock, flags); @@ -2863,7 +2857,7 @@ static int __init d40_dmaengine_init(struct d40_base *base, if (err) { d40_err(base->dev, "Failed to register slave channels\n"); - goto failure1; + goto exit; } d40_chan_init(base, &base->dma_memcpy, base->log_chans, @@ -2880,7 +2874,7 @@ static int __init d40_dmaengine_init(struct d40_base *base, if (err) { d40_err(base->dev, "Failed to register memcpy only channels\n"); - goto failure2; + goto unregister_slave; } d40_chan_init(base, &base->dma_both, base->phy_chans, @@ -2898,14 +2892,14 @@ static int __init d40_dmaengine_init(struct d40_base *base, if (err) { d40_err(base->dev, "Failed to register logical and physical capable channels\n"); - goto failure3; + goto unregister_memcpy; } return 0; -failure3: + unregister_memcpy: dma_async_device_unregister(&base->dma_memcpy); -failure2: + unregister_slave: dma_async_device_unregister(&base->dma_slave); -failure1: + exit: return err; } @@ -3116,11 +3110,11 @@ static int __init d40_phy_res_init(struct d40_base *base) static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev) { struct stedma40_platform_data *plat_data = dev_get_platdata(&pdev->dev); - struct clk *clk = NULL; - void __iomem *virtbase = NULL; - struct resource *res = NULL; - struct d40_base *base = NULL; - int num_log_chans = 0; + struct clk *clk; + void __iomem *virtbase; + struct resource *res; + struct d40_base *base; + int num_log_chans; int num_phy_chans; int num_memcpy_chans; int clk_ret = -EINVAL; @@ -3132,27 +3126,27 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev) clk = clk_get(&pdev->dev, NULL); if (IS_ERR(clk)) { d40_err(&pdev->dev, "No matching clock found\n"); - goto failure; + goto check_prepare_enabled; } clk_ret = clk_prepare_enable(clk); if (clk_ret) { d40_err(&pdev->dev, "Failed to prepare/enable clock\n"); - goto failure; + goto disable_unprepare; } /* Get IO for DMAC base address */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "base"); if (!res) - goto failure; + goto disable_unprepare; if (request_mem_region(res->start, resource_size(res), D40_NAME " I/O base") == NULL) - goto failure; + goto release_region; virtbase = ioremap(res->start, resource_size(res)); if (!virtbase) - goto failure; + goto release_region; /* This is just a regular AMBA PrimeCell ID actually */ for (pid = 0, i = 0; i < 4; i++) @@ -3164,13 +3158,13 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev) if (cid != AMBA_CID) { d40_err(&pdev->dev, "Unknown hardware! No PrimeCell ID\n"); - goto failure; + goto unmap_io; } if (AMBA_MANF_BITS(pid) != AMBA_VENDOR_ST) { d40_err(&pdev->dev, "Unknown designer! Got %x wanted %x\n", AMBA_MANF_BITS(pid), AMBA_VENDOR_ST); - goto failure; + goto unmap_io; } /* * HW revision: @@ -3184,7 +3178,7 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev) rev = AMBA_REV_BITS(pid); if (rev < 2) { d40_err(&pdev->dev, "hardware revision: %d is not supported", rev); - goto failure; + goto unmap_io; } /* The number of physical channels on this HW */ @@ -3210,7 +3204,7 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev) sizeof(struct d40_chan), GFP_KERNEL); if (base == NULL) - goto failure; + goto unmap_io; base->rev = rev; base->clk = clk; @@ -3255,65 +3249,66 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev) base->gen_dmac.init_reg_size = ARRAY_SIZE(dma_init_reg_v4a); } - base->phy_res = kzalloc(num_phy_chans * sizeof(struct d40_phy_res), + base->phy_res = kcalloc(num_phy_chans, + sizeof(*base->phy_res), GFP_KERNEL); if (!base->phy_res) - goto failure; + goto free_base; - base->lookup_phy_chans = kzalloc(num_phy_chans * - sizeof(struct d40_chan *), + base->lookup_phy_chans = kcalloc(num_phy_chans, + sizeof(*base->lookup_phy_chans), GFP_KERNEL); if (!base->lookup_phy_chans) - goto failure; + goto free_phy_res; - base->lookup_log_chans = kzalloc(num_log_chans * - sizeof(struct d40_chan *), + base->lookup_log_chans = kcalloc(num_log_chans, + sizeof(*base->lookup_log_chans), GFP_KERNEL); if (!base->lookup_log_chans) - goto failure; + goto free_phy_chans; - base->reg_val_backup_chan = kmalloc(base->num_phy_chans * - sizeof(d40_backup_regs_chan), - GFP_KERNEL); + base->reg_val_backup_chan = kmalloc_array(base->num_phy_chans, + sizeof(d40_backup_regs_chan), + GFP_KERNEL); if (!base->reg_val_backup_chan) - goto failure; + goto free_log_chans; - base->lcla_pool.alloc_map = - kzalloc(num_phy_chans * sizeof(struct d40_desc *) - * D40_LCLA_LINK_PER_EVENT_GRP, GFP_KERNEL); + base->lcla_pool.alloc_map = kcalloc(num_phy_chans + * D40_LCLA_LINK_PER_EVENT_GRP, + sizeof(*base->lcla_pool.alloc_map), + GFP_KERNEL); if (!base->lcla_pool.alloc_map) - goto failure; + goto free_backup_chan; base->desc_slab = kmem_cache_create(D40_NAME, sizeof(struct d40_desc), 0, SLAB_HWCACHE_ALIGN, NULL); if (base->desc_slab == NULL) - goto failure; + goto free_map; return base; - -failure: + free_map: + kfree(base->lcla_pool.alloc_map); + free_backup_chan: + kfree(base->reg_val_backup_chan); + free_log_chans: + kfree(base->lookup_log_chans); + free_phy_chans: + kfree(base->lookup_phy_chans); + free_phy_res: + kfree(base->phy_res); + free_base: + kfree(base); + unmap_io: + iounmap(virtbase); + release_region: + release_mem_region(res->start, resource_size(res)); + check_prepare_enabled: if (!clk_ret) + disable_unprepare: clk_disable_unprepare(clk); if (!IS_ERR(clk)) clk_put(clk); - if (virtbase) - iounmap(virtbase); - if (res) - release_mem_region(res->start, - resource_size(res)); - if (virtbase) - iounmap(virtbase); - - if (base) { - kfree(base->lcla_pool.alloc_map); - kfree(base->reg_val_backup_chan); - kfree(base->lookup_log_chans); - kfree(base->lookup_phy_chans); - kfree(base->phy_res); - kfree(base); - } - return NULL; } @@ -3376,20 +3371,18 @@ static int __init d40_lcla_allocate(struct d40_base *base) struct d40_lcla_pool *pool = &base->lcla_pool; unsigned long *page_list; int i, j; - int ret = 0; + int ret; /* * This is somewhat ugly. We need 8192 bytes that are 18 bit aligned, * To full fill this hardware requirement without wasting 256 kb * we allocate pages until we get an aligned one. */ - page_list = kmalloc(sizeof(unsigned long) * MAX_LCLA_ALLOC_ATTEMPTS, - GFP_KERNEL); - - if (!page_list) { - ret = -ENOMEM; - goto failure; - } + page_list = kmalloc_array(MAX_LCLA_ALLOC_ATTEMPTS, + sizeof(*page_list), + GFP_KERNEL); + if (!page_list) + return -ENOMEM; /* Calculating how many pages that are required */ base->lcla_pool.pages = SZ_1K * base->num_phy_chans / PAGE_SIZE; @@ -3405,7 +3398,7 @@ static int __init d40_lcla_allocate(struct d40_base *base) for (j = 0; j < i; j++) free_pages(page_list[j], base->lcla_pool.pages); - goto failure; + goto free_page_list; } if ((virt_to_phys((void *)page_list[i]) & @@ -3432,7 +3425,7 @@ static int __init d40_lcla_allocate(struct d40_base *base) GFP_KERNEL); if (!base->lcla_pool.base_unaligned) { ret = -ENOMEM; - goto failure; + goto free_page_list; } base->lcla_pool.base = PTR_ALIGN(base->lcla_pool.base_unaligned, @@ -3445,12 +3438,13 @@ static int __init d40_lcla_allocate(struct d40_base *base) if (dma_mapping_error(base->dev, pool->dma_addr)) { pool->dma_addr = 0; ret = -ENOMEM; - goto failure; + goto free_page_list; } writel(virt_to_phys(base->lcla_pool.base), base->virtbase + D40_DREG_LCLA); -failure: + ret = 0; + free_page_list: kfree(page_list); return ret; } @@ -3462,9 +3456,7 @@ static int __init d40_of_probe(struct platform_device *pdev, int num_phy = 0, num_memcpy = 0, num_disabled = 0; const __be32 *list; - pdata = devm_kzalloc(&pdev->dev, - sizeof(struct stedma40_platform_data), - GFP_KERNEL); + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; @@ -3546,7 +3538,7 @@ static int __init d40_probe(struct platform_device *pdev) if (!res) { ret = -ENOENT; d40_err(&pdev->dev, "No \"lcpa\" memory resource\n"); - goto failure; + goto destroy_cache; } base->lcpa_size = resource_size(res); base->phy_lcpa = res->start; @@ -3555,7 +3547,7 @@ static int __init d40_probe(struct platform_device *pdev) D40_NAME " I/O lcpa") == NULL) { ret = -EBUSY; d40_err(&pdev->dev, "Failed to request LCPA region %pR\n", res); - goto failure; + goto destroy_cache; } /* We make use of ESRAM memory for this. */ @@ -3571,7 +3563,7 @@ static int __init d40_probe(struct platform_device *pdev) if (!base->lcpa_base) { ret = -ENOMEM; d40_err(&pdev->dev, "Failed to ioremap LCPA region\n"); - goto failure; + goto destroy_cache; } /* If lcla has to be located in ESRAM we don't need to allocate */ if (base->plat_data->use_esram_lcla) { @@ -3581,14 +3573,14 @@ static int __init d40_probe(struct platform_device *pdev) ret = -ENOENT; d40_err(&pdev->dev, "No \"lcla_esram\" memory resource\n"); - goto failure; + goto destroy_cache; } base->lcla_pool.base = ioremap(res->start, resource_size(res)); if (!base->lcla_pool.base) { ret = -ENOMEM; d40_err(&pdev->dev, "Failed to ioremap LCLA region\n"); - goto failure; + goto destroy_cache; } writel(res->start, base->virtbase + D40_DREG_LCLA); @@ -3596,7 +3588,7 @@ static int __init d40_probe(struct platform_device *pdev) ret = d40_lcla_allocate(base); if (ret) { d40_err(&pdev->dev, "Failed to allocate LCLA area\n"); - goto failure; + goto destroy_cache; } } @@ -3607,7 +3599,7 @@ static int __init d40_probe(struct platform_device *pdev) ret = request_irq(base->irq, d40_handle_interrupt, 0, D40_NAME, base); if (ret) { d40_err(&pdev->dev, "No IRQ defined\n"); - goto failure; + goto destroy_cache; } if (base->plat_data->use_esram_lcla) { @@ -3617,7 +3609,7 @@ static int __init d40_probe(struct platform_device *pdev) d40_err(&pdev->dev, "Failed to get lcpa_regulator\n"); ret = PTR_ERR(base->lcpa_regulator); base->lcpa_regulator = NULL; - goto failure; + goto destroy_cache; } ret = regulator_enable(base->lcpa_regulator); @@ -3626,7 +3618,7 @@ static int __init d40_probe(struct platform_device *pdev) "Failed to enable lcpa_regulator\n"); regulator_put(base->lcpa_regulator); base->lcpa_regulator = NULL; - goto failure; + goto destroy_cache; } } @@ -3641,13 +3633,13 @@ static int __init d40_probe(struct platform_device *pdev) ret = d40_dmaengine_init(base, num_reserved_chans); if (ret) - goto failure; + goto destroy_cache; base->dev->dma_parms = &base->dma_parms; ret = dma_set_max_seg_size(base->dev, STEDMA40_MAX_SEG_SIZE); if (ret) { d40_err(&pdev->dev, "Failed to set dma max seg size\n"); - goto failure; + goto destroy_cache; } d40_hw_init(base); @@ -3661,8 +3653,7 @@ static int __init d40_probe(struct platform_device *pdev) dev_info(base->dev, "initialized\n"); return 0; - -failure: + destroy_cache: kmem_cache_destroy(base->desc_slab); if (base->virtbase) iounmap(base->virtbase); @@ -3704,7 +3695,7 @@ failure: kfree(base->lookup_phy_chans); kfree(base->phy_res); kfree(base); -report_failure: + report_failure: d40_err(&pdev->dev, "probe failed\n"); return ret; } |