[v2,09/15] dmaengine: dw-edma: Improve the linked list and data blocks definition

Message ID	ddedb81a606ac6f426c6c92f7b5dc86f268bbf01.1612269537.git.gustavo.pimentel@synopsys.com (mailing list archive)
State	Changes Requested
Headers	show Return-Path: <dmaengine-owner@kernel.org> From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com> To: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>, Vinod Koul <vkoul@kernel.org>, Dan Williams <dan.j.williams@intel.com> Subject: [PATCH v2 09/15] dmaengine: dw-edma: Improve the linked list and data blocks definition Date: Tue, 2 Feb 2021 13:40:23 +0100 Message-Id: <ddedb81a606ac6f426c6c92f7b5dc86f268bbf01.1612269537.git.gustavo.pimentel@synopsys.com> In-Reply-To: <cover.1612269536.git.gustavo.pimentel@synopsys.com> References: <cover.1612269536.git.gustavo.pimentel@synopsys.com> In-Reply-To: <cover.1612269536.git.gustavo.pimentel@synopsys.com> References: <cover.1612269536.git.gustavo.pimentel@synopsys.com> Precedence: bulk
Series	dmaengine: dw-edma: HDMA support \| expand [v2,00/15] dmaengine: dw-edma: HDMA support [v2,01/15] dmaengine: dw-edma: Add writeq() and readq() for 64 bits architectures [v2,02/15] dmaengine: dw-edma: Fix comments offset characters' alignment [v2,03/15] dmaengine: dw-edma: Add support for the HDMA feature [v2,04/15] PCI: Add pci_find_vsec_capability() to find a specific VSEC [v2,05/15] dmaengine: dw-edma: Add PCIe VSEC data retrieval support [v2,06/15] dmaengine: dw-edma: Add device_prep_interleave_dma() support [v2,07/15] dmaengine: dw-edma: Improve number of channels check [v2,08/15] dmaengine: dw-edma: Reorder variables to keep consistency [v2,09/15] dmaengine: dw-edma: Improve the linked list and data blocks definition [v2,10/15] dmaengine: dw-edma: Change linked list and data blocks offset and sizes [v2,11/15] dmaengine: dw-edma: Move struct dentry variable from static definition into dw_edma stru… [v2,12/15] dmaengine: dw-edma: Fix crash on loading/unloading driver [v2,13/15] dmaengine: dw-edma: Change DMA abreviation from lower into upper case [v2,14/15] dmaengine: dw-edma: Revert fix scatter-gather address calculation [v2,15/15] dmaengine: dw-edma: Add pcim_iomap_table return checker

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c index 5495cf7..48887b5 100644 --- a/drivers/dma/dw-edma/dw-edma-core.c +++ b/drivers/dma/dw-edma/dw-edma-core.c @@ -81,8 +81,13 @@ static struct dw_edma_chunk *dw_edma_alloc_chunk(struct dw_edma_desc *desc) * - Even chunks originate CB equal to 1 */ chunk->cb = !(desc->chunks_alloc % 2); - chunk->ll_region.paddr = dw->ll_region.paddr + chan->ll_off; - chunk->ll_region.vaddr = dw->ll_region.vaddr + chan->ll_off; + if (chan->dir == EDMA_DIR_WRITE) { + chunk->ll_region.paddr = dw->ll_region_wr[chan->id].paddr; + chunk->ll_region.vaddr = dw->ll_region_wr[chan->id].vaddr; + } else { + chunk->ll_region.paddr = dw->ll_region_rd[chan->id].paddr; + chunk->ll_region.vaddr = dw->ll_region_rd[chan->id].vaddr; + } if (desc->chunk) { /* Create and add new element into the linked list */ @@ -691,24 +696,13 @@ static int dw_edma_channel_setup(struct dw_edma_chip *chip, bool write, struct device *dev = chip->dev; struct dw_edma *dw = chip->dw; struct dw_edma_chan *chan; - size_t ll_chunk, dt_chunk; struct dw_edma_irq *irq; struct dma_device *dma; - u32 i, j, cnt, ch_cnt; u32 alloc, off_alloc; + u32 i, j, cnt; int err = 0; u32 pos; - ch_cnt = dw->wr_ch_cnt + dw->rd_ch_cnt; - ll_chunk = dw->ll_region.sz; - dt_chunk = dw->dt_region.sz; - - /* Calculate linked list chunk for each channel */ - ll_chunk /= roundup_pow_of_two(ch_cnt); - - /* Calculate linked list chunk for each channel */ - dt_chunk /= roundup_pow_of_two(ch_cnt); - if (write) { i = 0; cnt = dw->wr_ch_cnt; @@ -740,14 +734,14 @@ static int dw_edma_channel_setup(struct dw_edma_chip *chip, bool write, chan->request = EDMA_REQ_NONE; chan->status = EDMA_ST_IDLE; - chan->ll_off = (ll_chunk * i); - chan->ll_max = (ll_chunk / EDMA_LL_SZ) - 1; - - chan->dt_off = (dt_chunk * i); + if (write) + chan->ll_max = (dw->ll_region_wr[j].sz / EDMA_LL_SZ); + else + chan->ll_max = (dw->ll_region_rd[j].sz / EDMA_LL_SZ); + chan->ll_max -= 1; - dev_vdbg(dev, "L. List:\tChannel %s[%u] off=0x%.8lx, max_cnt=%u\n", - write ? "write" : "read", j, - chan->ll_off, chan->ll_max); + dev_vdbg(dev, "L. List:\tChannel %s[%u] max_cnt=%u\n", + write ? "write" : "read", j, chan->ll_max); if (dw->nr_irqs == 1) pos = 0; @@ -772,12 +766,15 @@ static int dw_edma_channel_setup(struct dw_edma_chip *chip, bool write, chan->vc.desc_free = vchan_free_desc; vchan_init(&chan->vc, dma); - dt_region->paddr = dw->dt_region.paddr + chan->dt_off; - dt_region->vaddr = dw->dt_region.vaddr + chan->dt_off; - dt_region->sz = dt_chunk; - - dev_vdbg(dev, "Data:\tChannel %s[%u] off=0x%.8lx\n", - write ? "write" : "read", j, chan->dt_off); + if (write) { + dt_region->paddr = dw->dt_region_wr[j].paddr; + dt_region->vaddr = dw->dt_region_wr[j].vaddr; + dt_region->sz = dw->dt_region_wr[j].sz; + } else { + dt_region->paddr = dw->dt_region_rd[j].paddr; + dt_region->vaddr = dw->dt_region_rd[j].vaddr; + dt_region->sz = dw->dt_region_rd[j].sz; + } dw_edma_v0_core_device_config(chan); } diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h index 650b1c7..cba5436 100644 --- a/drivers/dma/dw-edma/dw-edma-core.h +++ b/drivers/dma/dw-edma/dw-edma-core.h @@ -91,11 +91,8 @@ struct dw_edma_chan { int id; enum dw_edma_dir dir; - off_t ll_off; u32 ll_max; - off_t dt_off; - struct msi_msg msi; enum dw_edma_request request; @@ -126,8 +123,10 @@ struct dw_edma { u16 rd_ch_cnt; struct dw_edma_region rg_region; /* Registers */ - struct dw_edma_region ll_region; /* Linked list */ - struct dw_edma_region dt_region; /* Data */ + struct dw_edma_region ll_region_wr[EDMA_MAX_WR_CH]; + struct dw_edma_region ll_region_rd[EDMA_MAX_RD_CH]; + struct dw_edma_region dt_region_wr[EDMA_MAX_WR_CH]; + struct dw_edma_region dt_region_rd[EDMA_MAX_RD_CH]; struct dw_edma_irq *irq; int nr_irqs; diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c index 9e79eb5..a0fa809 100644 --- a/drivers/dma/dw-edma/dw-edma-pcie.c +++ b/drivers/dma/dw-edma/dw-edma-pcie.c @@ -23,19 +23,28 @@ #define DW_PCIE_VSEC_DMA_WR_CH GENMASK(9, 0) #define DW_PCIE_VSEC_DMA_RD_CH GENMASK(25, 16) +#define DW_BLOCK(a, b, c) \ + { \ + .bar = a, \ + .off = b, \ + .sz = c, \ + }, + +struct dw_edma_block { + enum pci_barno bar; + off_t off; + size_t sz; +}; + struct dw_edma_pcie_data { /* eDMA registers location */ - enum pci_barno rg_bar; - off_t rg_off; - size_t rg_sz; + struct dw_edma_block rg; /* eDMA memory linked list location */ - enum pci_barno ll_bar; - off_t ll_off; - size_t ll_sz; + struct dw_edma_block ll_wr[EDMA_MAX_WR_CH]; + struct dw_edma_block ll_rd[EDMA_MAX_RD_CH]; /* eDMA memory data location */ - enum pci_barno dt_bar; - off_t dt_off; - size_t dt_sz; + struct dw_edma_block dt_wr[EDMA_MAX_WR_CH]; + struct dw_edma_block dt_rd[EDMA_MAX_RD_CH]; /* Other */ enum dw_edma_map_format mf; u8 irqs; @@ -45,22 +54,40 @@ struct dw_edma_pcie_data { static const struct dw_edma_pcie_data snps_edda_data = { /* eDMA registers location */ - .rg_bar = BAR_0, - .rg_off = 0x00001000, /* 4 Kbytes */ - .rg_sz = 0x00002000, /* 8 Kbytes */ + .rg.bar = BAR_0, + .rg.off = 0x00001000, /* 4 Kbytes */ + .rg.sz = 0x00002000, /* 8 Kbytes */ /* eDMA memory linked list location */ - .ll_bar = BAR_2, - .ll_off = 0x00000000, /* 0 Kbytes */ - .ll_sz = 0x00800000, /* 8 Mbytes */ + .ll_wr = { + /* Channel 0 - BAR 2, offset 0 Mbytes, size 2 Mbytes */ + DW_BLOCK(BAR_2, 0x00000000, 0x00200000) + /* Channel 1 - BAR 2, offset 2 Mbytes, size 2 Mbytes */ + DW_BLOCK(BAR_2, 0x00200000, 0x00200000) + }, + .ll_rd = { + /* Channel 0 - BAR 2, offset 4 Mbytes, size 2 Mbytes */ + DW_BLOCK(BAR_2, 0x00400000, 0x00200000) + /* Channel 1 - BAR 2, offset 6 Mbytes, size 2 Mbytes */ + DW_BLOCK(BAR_2, 0x00600000, 0x00200000) + }, /* eDMA memory data location */ - .dt_bar = BAR_2, - .dt_off = 0x00800000, /* 8 Mbytes */ - .dt_sz = 0x03800000, /* 56 Mbytes */ + .dt_wr = { + /* Channel 0 - BAR 2, offset 8 Mbytes, size 14 Mbytes */ + DW_BLOCK(BAR_2, 0x00800000, 0x00e00000) + /* Channel 1 - BAR 2, offset 22 Mbytes, size 14 Mbytes */ + DW_BLOCK(BAR_2, 0x01600000, 0x00e00000) + }, + .dt_rd = { + /* Channel 0 - BAR 2, offset 36 Mbytes, size 14 Mbytes */ + DW_BLOCK(BAR_2, 0x02400000, 0x00e00000) + /* Channel 1 - BAR 2, offset 50 Mbytes, size 14 Mbytes */ + DW_BLOCK(BAR_2, 0x03200000, 0x00e00000) + }, /* Other */ .mf = EDMA_MF_EDMA_UNROLL, .irqs = 1, - .wr_ch_cnt = 0, - .rd_ch_cnt = 0, + .wr_ch_cnt = 2, + .rd_ch_cnt = 2, }; static int dw_edma_pcie_irq_vector(struct device *dev, unsigned int nr) @@ -96,18 +123,20 @@ static void dw_edma_pcie_get_vsec_dma_data(struct pci_dev *pdev, return; pdata->mf = map; - pdata->rg_bar = FIELD_GET(DW_PCIE_VSEC_DMA_BAR, val); + pdata->rg.bar = FIELD_GET(DW_PCIE_VSEC_DMA_BAR, val); pci_read_config_dword(pdev, vsec + 0xc, &val); - pdata->wr_ch_cnt = FIELD_GET(DW_PCIE_VSEC_DMA_WR_CH, val); - pdata->rd_ch_cnt = FIELD_GET(DW_PCIE_VSEC_DMA_RD_CH, val); + pdata->wr_ch_cnt = min_t(u16, pdata->wr_ch_cnt, + FIELD_GET(DW_PCIE_VSEC_DMA_WR_CH, val)); + pdata->rd_ch_cnt = min_t(u16, pdata->rd_ch_cnt, + FIELD_GET(DW_PCIE_VSEC_DMA_RD_CH, val)); pci_read_config_dword(pdev, vsec + 0x14, &val); off = val; pci_read_config_dword(pdev, vsec + 0x10, &val); off <<= 32; off |= val; - pdata->rg_off = off; + pdata->rg.off = off; } static int dw_edma_pcie_probe(struct pci_dev *pdev, @@ -119,6 +148,7 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, struct dw_edma_chip *chip; struct dw_edma *dw; int err, nr_irqs; + int i, mask; /* Enable PCI device */ err = pcim_enable_device(pdev); @@ -136,10 +166,16 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, dw_edma_pcie_get_vsec_dma_data(pdev, &vsec_data); /* Mapping PCI BAR regions */ - err = pcim_iomap_regions(pdev, BIT(vsec_data.rg_bar) | - BIT(vsec_data.ll_bar) | - BIT(vsec_data.dt_bar), - pci_name(pdev)); + mask = BIT(vsec_data.rg.bar); + for (i = 0; i < vsec_data.wr_ch_cnt; i++) { + mask |= BIT(vsec_data.ll_wr[i].bar); + mask |= BIT(vsec_data.dt_wr[i].bar); + } + for (i = 0; i < vsec_data.rd_ch_cnt; i++) { + mask |= BIT(vsec_data.ll_rd[i].bar); + mask |= BIT(vsec_data.dt_rd[i].bar); + } + err = pcim_iomap_regions(pdev, mask, pci_name(pdev)); if (err) { pci_err(pdev, "eDMA BAR I/O remapping failed\n"); return err; @@ -195,30 +231,56 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, chip->id = pdev->devfn; chip->irq = pdev->irq; - dw->rg_region.vaddr = pcim_iomap_table(pdev)[vsec_data.rg_bar]; - dw->rg_region.vaddr += vsec_data.rg_off; - dw->rg_region.paddr = pdev->resource[vsec_data.rg_bar].start; - dw->rg_region.paddr += vsec_data.rg_off; - dw->rg_region.sz = vsec_data.rg_sz; - - dw->ll_region.vaddr = pcim_iomap_table(pdev)[vsec_data.ll_bar]; - dw->ll_region.vaddr += vsec_data.ll_off; - dw->ll_region.paddr = pdev->resource[vsec_data.ll_bar].start; - dw->ll_region.paddr += vsec_data.ll_off; - dw->ll_region.sz = vsec_data.ll_sz; - - dw->dt_region.vaddr = pcim_iomap_table(pdev)[vsec_data.dt_bar]; - dw->dt_region.vaddr += vsec_data.dt_off; - dw->dt_region.paddr = pdev->resource[vsec_data.dt_bar].start; - dw->dt_region.paddr += vsec_data.dt_off; - dw->dt_region.sz = vsec_data.dt_sz; - dw->mf = vsec_data.mf; dw->nr_irqs = nr_irqs; dw->ops = &dw_edma_pcie_core_ops; dw->wr_ch_cnt = vsec_data.wr_ch_cnt; dw->rd_ch_cnt = vsec_data.rd_ch_cnt; + dw->rg_region.vaddr = pcim_iomap_table(pdev)[vsec_data.rg.bar]; + dw->rg_region.vaddr += vsec_data.rg.off; + dw->rg_region.paddr = pdev->resource[vsec_data.rg.bar].start; + dw->rg_region.paddr += vsec_data.rg.off; + dw->rg_region.sz = vsec_data.rg.sz; + + for (i = 0; i < dw->wr_ch_cnt; i++) { + struct dw_edma_region *ll_region = &dw->ll_region_wr[i]; + struct dw_edma_region *dt_region = &dw->dt_region_wr[i]; + struct dw_edma_block *ll_block = &vsec_data.ll_wr[i]; + struct dw_edma_block *dt_block = &vsec_data.dt_wr[i]; + + ll_region->vaddr = pcim_iomap_table(pdev)[ll_block->bar]; + ll_region->vaddr += ll_block->off; + ll_region->paddr = pdev->resource[ll_block->bar].start; + ll_region->paddr += ll_block->off; + ll_region->sz = ll_block->sz; + + dt_region->vaddr = pcim_iomap_table(pdev)[dt_block->bar]; + dt_region->vaddr += dt_block->off; + dt_region->paddr = pdev->resource[dt_block->bar].start; + dt_region->paddr += dt_block->off; + dt_region->sz = dt_block->sz; + } + + for (i = 0; i < dw->rd_ch_cnt; i++) { + struct dw_edma_region *ll_region = &dw->ll_region_rd[i]; + struct dw_edma_region *dt_region = &dw->dt_region_rd[i]; + struct dw_edma_block *ll_block = &vsec_data.ll_rd[i]; + struct dw_edma_block *dt_block = &vsec_data.dt_rd[i]; + + ll_region->vaddr = pcim_iomap_table(pdev)[ll_block->bar]; + ll_region->vaddr += ll_block->off; + ll_region->paddr = pdev->resource[ll_block->bar].start; + ll_region->paddr += ll_block->off; + ll_region->sz = ll_block->sz; + + dt_region->vaddr = pcim_iomap_table(pdev)[dt_block->bar]; + dt_region->vaddr += dt_block->off; + dt_region->paddr = pdev->resource[dt_block->bar].start; + dt_region->paddr += dt_block->off; + dt_region->sz = dt_block->sz; + } + /* Debug info */ if (dw->mf == EDMA_MF_EDMA_LEGACY) pci_dbg(pdev, "Version:\teDMA Port Logic (0x%x)\n", dw->mf); @@ -230,16 +292,33 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, pci_dbg(pdev, "Version:\tUnknown (0x%x)\n", dw->mf); pci_dbg(pdev, "Registers:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n", - vsec_data.rg_bar, vsec_data.rg_off, vsec_data.rg_sz, + vsec_data.rg.bar, vsec_data.rg.off, vsec_data.rg.sz, dw->rg_region.vaddr, &dw->rg_region.paddr); - pci_dbg(pdev, "L. List:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n", - vsec_data.ll_bar, vsec_data.ll_off, vsec_data.ll_sz, - dw->ll_region.vaddr, &dw->ll_region.paddr); - pci_dbg(pdev, "Data:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n", - vsec_data.dt_bar, vsec_data.dt_off, vsec_data.dt_sz, - dw->dt_region.vaddr, &dw->dt_region.paddr); + for (i = 0; i < dw->wr_ch_cnt; i++) { + pci_dbg(pdev, "L. List:\tWRITE CH%.2u, BAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n", + i, vsec_data.ll_wr[i].bar, + vsec_data.ll_wr[i].off, dw->ll_region_wr[i].sz, + dw->ll_region_wr[i].vaddr, &dw->ll_region_wr[i].paddr); + + pci_dbg(pdev, "Data:\tWRITE CH%.2u, BAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n", + i, vsec_data.dt_wr[i].bar, + vsec_data.dt_wr[i].off, dw->dt_region_wr[i].sz, + dw->dt_region_wr[i].vaddr, &dw->dt_region_wr[i].paddr); + } + + for (i = 0; i < dw->rd_ch_cnt; i++) { + pci_dbg(pdev, "L. List:\tREAD CH%.2u, BAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n", + i, vsec_data.ll_rd[i].bar, + vsec_data.ll_rd[i].off, dw->ll_region_rd[i].sz, + dw->ll_region_rd[i].vaddr, &dw->ll_region_rd[i].paddr); + + pci_dbg(pdev, "Data:\tREAD CH%.2u, BAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n", + i, vsec_data.dt_rd[i].bar, + vsec_data.dt_rd[i].off, dw->dt_region_rd[i].sz, + dw->dt_region_rd[i].vaddr, &dw->dt_region_rd[i].paddr); + } pci_dbg(pdev, "Nr. IRQs:\t%u\n", dw->nr_irqs);

[v2,09/15] dmaengine: dw-edma: Improve the linked list and data blocks definition

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Patch