From patchwork Sat Mar 30 04:19:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 13611457 X-Patchwork-Delegate: manivannanece23@gmail.com Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 25B3279D8; Sat, 30 Mar 2024 04:19:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711772385; cv=none; b=uWMid1w7AxngNcqD1QvbQs+BSqBml6K8KNPrHku7KdR7lYdamdTJdg7ld5k+xBW6Xb1aq89C6sG5iAd2ri+4I0Ut0/3hD5RObtqFudTzWurS0L+IVSGEl1ZlYIpW7BlfXzwMxroK2jb8vQB5HRnqi9Btn8CXeCbK+pAGoZ5Oeqo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711772385; c=relaxed/simple; bh=HDumR+C0lGN+JmG5mxEWg0Dd7ELkE1gQie7RsRRWKzI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NZrdP9reilcqb2k+LfX7dVgJXVXVhCn+ilAU/0r2VuQyWHDyAJtUIr3y3rJZO2wL8A0LbicIDz3bT3mPm+9M5UGMcKhCYZuZizLx0pLEWqCPize6GbuKeqOdtuBDVBszj7pIXw2LgfpSdg2vhmGbUEWhmN62IxJCq5k7UXniNQw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RvH876P8; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="RvH876P8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D8BCEC433F1; Sat, 30 Mar 2024 04:19:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711772384; bh=HDumR+C0lGN+JmG5mxEWg0Dd7ELkE1gQie7RsRRWKzI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RvH876P8Cg9HRvsXw9mKUTaRThvjSubsFNiCCtvm+opc+Z3oJRs2bmY/fKbEDh7Jq k5CWGaOsno5YX7e1aeYWzGo2megjYU6ZmKSsa9xIj8IUV/CuoQW2B7FEO2720ANHYr y+pTVN4IHWvN5ZsS38uTT4gmo/FUCsoQCWNgtqcOWCYhTWyXxBM4OaRtTd7EUku7RC rzdo/MDkqmPKzuiINF71v4sjeiUes0MroQ4cjs/fr34EWqYkBlHLZ/iQ/2QjEbv0qM vTlPXzt9JhrPhyRg094V7pvHj7fmp1q5p0O/7cBMWhSbDbA/fymIDb05DAu3FxyFAU h27UQSqTaVOXg== From: Damien Le Moal To: Manivannan Sadhasivam , Lorenzo Pieralisi , Kishon Vijay Abraham I , Shawn Lin , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Bjorn Helgaas , Heiko Stuebner , linux-pci@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org Cc: linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Rick Wertenbroek , Wilfred Mallawa , Niklas Cassel Subject: [PATCH v2 04/18] PCI: endpoint: test: Use pci_epc_mem_map/unmap() Date: Sat, 30 Mar 2024 13:19:14 +0900 Message-ID: <20240330041928.1555578-5-dlemoal@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240330041928.1555578-1-dlemoal@kernel.org> References: <20240330041928.1555578-1-dlemoal@kernel.org> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Modify the endpoint test driver to use the functions pci_epc_mem_map() and pci_epc_mem_unmap() for the read, write and copy tests. For each test case, the transfer (dma or mmio) are executed in a loop to ensure that potentially partial mappings returned by pci_epc_mem_map() are correctly handled. Signed-off-by: Damien Le Moal --- drivers/pci/endpoint/functions/pci-epf-test.c | 378 +++++++++--------- 1 file changed, 197 insertions(+), 181 deletions(-) diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index cd4ffb39dcdc..0e285e539538 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -317,91 +317,94 @@ static void pci_epf_test_print_rate(struct pci_epf_test *epf_test, static void pci_epf_test_copy(struct pci_epf_test *epf_test, struct pci_epf_test_reg *reg) { - int ret; - void __iomem *src_addr; - void __iomem *dst_addr; - phys_addr_t src_phys_addr; - phys_addr_t dst_phys_addr; + int ret = 0; struct timespec64 start, end; struct pci_epf *epf = epf_test->epf; - struct device *dev = &epf->dev; struct pci_epc *epc = epf->epc; + struct device *dev = &epf->dev; + struct pci_epc_map src_map, dst_map; + u64 src_addr = reg->src_addr; + u64 dst_addr = reg->dst_addr; + size_t copy_size = reg->size; + ssize_t map_size = 0; + void *copy_buf = NULL, *buf; - src_addr = pci_epc_mem_alloc_addr(epc, &src_phys_addr, reg->size); - if (!src_addr) { - dev_err(dev, "Failed to allocate source address\n"); - reg->status = STATUS_SRC_ADDR_INVALID; - ret = -ENOMEM; - goto err; - } - - ret = pci_epc_map_addr(epc, epf->func_no, epf->vfunc_no, src_phys_addr, - reg->src_addr, reg->size); - if (ret) { - dev_err(dev, "Failed to map source address\n"); - reg->status = STATUS_SRC_ADDR_INVALID; - goto err_src_addr; - } - - dst_addr = pci_epc_mem_alloc_addr(epc, &dst_phys_addr, reg->size); - if (!dst_addr) { - dev_err(dev, "Failed to allocate destination address\n"); - reg->status = STATUS_DST_ADDR_INVALID; - ret = -ENOMEM; - goto err_src_map_addr; - } - - ret = pci_epc_map_addr(epc, epf->func_no, epf->vfunc_no, dst_phys_addr, - reg->dst_addr, reg->size); - if (ret) { - dev_err(dev, "Failed to map destination address\n"); - reg->status = STATUS_DST_ADDR_INVALID; - goto err_dst_addr; - } - - ktime_get_ts64(&start); if (reg->flags & FLAG_USE_DMA) { if (epf_test->dma_private) { dev_err(dev, "Cannot transfer data using DMA\n"); ret = -EINVAL; - goto err_map_addr; + goto set_status; } - - ret = pci_epf_test_data_transfer(epf_test, dst_phys_addr, - src_phys_addr, reg->size, 0, - DMA_MEM_TO_MEM); - if (ret) - dev_err(dev, "Data transfer failed\n"); } else { - void *buf; - - buf = kzalloc(reg->size, GFP_KERNEL); - if (!buf) { + copy_buf = kzalloc(copy_size, GFP_KERNEL); + if (!copy_buf) { ret = -ENOMEM; - goto err_map_addr; + goto set_status; } - - memcpy_fromio(buf, src_addr, reg->size); - memcpy_toio(dst_addr, buf, reg->size); - kfree(buf); + buf = copy_buf; } - ktime_get_ts64(&end); - pci_epf_test_print_rate(epf_test, "COPY", reg->size, &start, &end, - reg->flags & FLAG_USE_DMA); -err_map_addr: - pci_epc_unmap_addr(epc, epf->func_no, epf->vfunc_no, dst_phys_addr); + while (copy_size) { + map_size = pci_epc_mem_map(epc, epf->func_no, epf->vfunc_no, + src_addr, copy_size, &src_map); + if (map_size < 0) { + dev_err(dev, "Failed to map source address\n"); + reg->status = STATUS_SRC_ADDR_INVALID; + ret = map_size; + goto free_buf; + } + + map_size = pci_epc_mem_map(epf->epc, epf->func_no, epf->vfunc_no, + dst_addr, copy_size, &dst_map); + if (map_size < 0) { + dev_err(dev, "Failed to map destination address\n"); + reg->status = STATUS_DST_ADDR_INVALID; + ret = map_size; + pci_epc_mem_unmap(epc, epf->func_no, epf->vfunc_no, + &src_map); + goto free_buf; + } + + map_size = min_t(size_t, map_size, src_map.pci_size); + + ktime_get_ts64(&start); + if (reg->flags & FLAG_USE_DMA) { + ret = pci_epf_test_data_transfer(epf_test, + dst_map.phys_addr, src_map.phys_addr, + map_size, 0, DMA_MEM_TO_MEM); + if (ret) { + dev_err(dev, "Data transfer failed\n"); + goto unmap; + } + } else { + memcpy_fromio(buf, src_map.virt_addr, map_size); + memcpy_toio(dst_map.virt_addr, buf, map_size); + buf += map_size; + } + ktime_get_ts64(&end); + + copy_size -= map_size; + src_addr += map_size; + dst_addr += map_size; -err_dst_addr: - pci_epc_mem_free_addr(epc, dst_phys_addr, dst_addr, reg->size); + pci_epc_mem_unmap(epc, epf->func_no, epf->vfunc_no, &dst_map); + pci_epc_mem_unmap(epc, epf->func_no, epf->vfunc_no, &src_map); + map_size = 0; + } -err_src_map_addr: - pci_epc_unmap_addr(epc, epf->func_no, epf->vfunc_no, src_phys_addr); + pci_epf_test_print_rate(epf_test, "COPY", reg->size, &start, + &end, reg->flags & FLAG_USE_DMA); + +unmap: + if (map_size) { + pci_epc_mem_unmap(epc, epf->func_no, epf->vfunc_no, &dst_map); + pci_epc_mem_unmap(epc, epf->func_no, epf->vfunc_no, &src_map); + } -err_src_addr: - pci_epc_mem_free_addr(epc, src_phys_addr, src_addr, reg->size); +free_buf: + kfree(copy_buf); -err: +set_status: if (!ret) reg->status |= STATUS_COPY_SUCCESS; else @@ -411,82 +414,89 @@ static void pci_epf_test_copy(struct pci_epf_test *epf_test, static void pci_epf_test_read(struct pci_epf_test *epf_test, struct pci_epf_test_reg *reg) { - int ret; - void __iomem *src_addr; - void *buf; + int ret = 0; + void *src_buf, *buf; u32 crc32; - phys_addr_t phys_addr; + struct pci_epc_map map; phys_addr_t dst_phys_addr; struct timespec64 start, end; struct pci_epf *epf = epf_test->epf; - struct device *dev = &epf->dev; struct pci_epc *epc = epf->epc; + struct device *dev = &epf->dev; struct device *dma_dev = epf->epc->dev.parent; + u64 src_addr = reg->src_addr; + size_t src_size = reg->size; + ssize_t map_size = 0; - src_addr = pci_epc_mem_alloc_addr(epc, &phys_addr, reg->size); - if (!src_addr) { - dev_err(dev, "Failed to allocate address\n"); - reg->status = STATUS_SRC_ADDR_INVALID; + src_buf = kzalloc(src_size, GFP_KERNEL); + if (!src_buf) { ret = -ENOMEM; - goto err; - } - - ret = pci_epc_map_addr(epc, epf->func_no, epf->vfunc_no, phys_addr, - reg->src_addr, reg->size); - if (ret) { - dev_err(dev, "Failed to map address\n"); - reg->status = STATUS_SRC_ADDR_INVALID; - goto err_addr; - } - - buf = kzalloc(reg->size, GFP_KERNEL); - if (!buf) { - ret = -ENOMEM; - goto err_map_addr; + goto set_status; } + buf = src_buf; + + while (src_size) { + map_size = pci_epc_mem_map(epc, epf->func_no, epf->vfunc_no, + src_addr, src_size, &map); + if (map_size < 0) { + dev_err(dev, "Failed to map address\n"); + reg->status = STATUS_SRC_ADDR_INVALID; + ret = map_size; + goto free_buf; + } - if (reg->flags & FLAG_USE_DMA) { - dst_phys_addr = dma_map_single(dma_dev, buf, reg->size, - DMA_FROM_DEVICE); - if (dma_mapping_error(dma_dev, dst_phys_addr)) { - dev_err(dev, "Failed to map destination buffer addr\n"); - ret = -ENOMEM; - goto err_dma_map; + if (reg->flags & FLAG_USE_DMA) { + dst_phys_addr = dma_map_single(dma_dev, buf, map_size, + DMA_FROM_DEVICE); + if (dma_mapping_error(dma_dev, dst_phys_addr)) { + dev_err(dev, + "Failed to map destination buffer addr\n"); + ret = -ENOMEM; + goto unmap; + } + + ktime_get_ts64(&start); + ret = pci_epf_test_data_transfer(epf_test, + dst_phys_addr, map.phys_addr, + map_size, src_addr, DMA_DEV_TO_MEM); + if (ret) + dev_err(dev, "Data transfer failed\n"); + ktime_get_ts64(&end); + + dma_unmap_single(dma_dev, dst_phys_addr, map_size, + DMA_FROM_DEVICE); + + if (ret) + goto unmap; + } else { + ktime_get_ts64(&start); + memcpy_fromio(buf, map.virt_addr, map_size); + ktime_get_ts64(&end); } - ktime_get_ts64(&start); - ret = pci_epf_test_data_transfer(epf_test, dst_phys_addr, - phys_addr, reg->size, - reg->src_addr, DMA_DEV_TO_MEM); - if (ret) - dev_err(dev, "Data transfer failed\n"); - ktime_get_ts64(&end); + src_size -= map_size; + src_addr += map_size; + buf += map_size; - dma_unmap_single(dma_dev, dst_phys_addr, reg->size, - DMA_FROM_DEVICE); - } else { - ktime_get_ts64(&start); - memcpy_fromio(buf, src_addr, reg->size); - ktime_get_ts64(&end); + pci_epc_mem_unmap(epc, epf->func_no, epf->vfunc_no, &map); + map_size = 0; } - pci_epf_test_print_rate(epf_test, "READ", reg->size, &start, &end, - reg->flags & FLAG_USE_DMA); + pci_epf_test_print_rate(epf_test, "READ", reg->size, &start, + &end, reg->flags & FLAG_USE_DMA); - crc32 = crc32_le(~0, buf, reg->size); + crc32 = crc32_le(~0, src_buf, reg->size); if (crc32 != reg->checksum) ret = -EIO; -err_dma_map: - kfree(buf); +unmap: + if (map_size) + pci_epc_mem_unmap(epc, epf->func_no, epf->vfunc_no, &map); -err_map_addr: - pci_epc_unmap_addr(epc, epf->func_no, epf->vfunc_no, phys_addr); +free_buf: + kfree(src_buf); -err_addr: - pci_epc_mem_free_addr(epc, phys_addr, src_addr, reg->size); - -err: +set_status: if (!ret) reg->status |= STATUS_READ_SUCCESS; else @@ -496,71 +506,79 @@ static void pci_epf_test_read(struct pci_epf_test *epf_test, static void pci_epf_test_write(struct pci_epf_test *epf_test, struct pci_epf_test_reg *reg) { - int ret; - void __iomem *dst_addr; - void *buf; - phys_addr_t phys_addr; + int ret = 0; + void *dst_buf, *buf; + struct pci_epc_map map; phys_addr_t src_phys_addr; struct timespec64 start, end; struct pci_epf *epf = epf_test->epf; - struct device *dev = &epf->dev; struct pci_epc *epc = epf->epc; + struct device *dev = &epf->dev; struct device *dma_dev = epf->epc->dev.parent; + u64 dst_addr = reg->dst_addr; + size_t dst_size = reg->size; + ssize_t map_size = 0; - dst_addr = pci_epc_mem_alloc_addr(epc, &phys_addr, reg->size); - if (!dst_addr) { - dev_err(dev, "Failed to allocate address\n"); - reg->status = STATUS_DST_ADDR_INVALID; + dst_buf = kzalloc(dst_size, GFP_KERNEL); + if (!dst_buf) { ret = -ENOMEM; - goto err; + goto set_status; } - - ret = pci_epc_map_addr(epc, epf->func_no, epf->vfunc_no, phys_addr, - reg->dst_addr, reg->size); - if (ret) { - dev_err(dev, "Failed to map address\n"); - reg->status = STATUS_DST_ADDR_INVALID; - goto err_addr; - } - - buf = kzalloc(reg->size, GFP_KERNEL); - if (!buf) { - ret = -ENOMEM; - goto err_map_addr; - } - - get_random_bytes(buf, reg->size); - reg->checksum = crc32_le(~0, buf, reg->size); - - if (reg->flags & FLAG_USE_DMA) { - src_phys_addr = dma_map_single(dma_dev, buf, reg->size, - DMA_TO_DEVICE); - if (dma_mapping_error(dma_dev, src_phys_addr)) { - dev_err(dev, "Failed to map source buffer addr\n"); - ret = -ENOMEM; - goto err_dma_map; + get_random_bytes(dst_buf, dst_size); + reg->checksum = crc32_le(~0, dst_buf, dst_size); + buf = dst_buf; + + while (dst_size) { + map_size = pci_epc_mem_map(epc, epf->func_no, epf->vfunc_no, + dst_addr, dst_size, &map); + if (map_size < 0) { + dev_err(dev, "Failed to map address\n"); + reg->status = STATUS_DST_ADDR_INVALID; + ret = map_size; + goto free_buf; } - ktime_get_ts64(&start); + if (reg->flags & FLAG_USE_DMA) { + src_phys_addr = dma_map_single(dma_dev, buf, map_size, + DMA_TO_DEVICE); + if (dma_mapping_error(dma_dev, src_phys_addr)) { + dev_err(dev, + "Failed to map source buffer addr\n"); + ret = -ENOMEM; + goto unmap; + } + + ktime_get_ts64(&start); + + ret = pci_epf_test_data_transfer(epf_test, + map.phys_addr, src_phys_addr, + map_size, dst_addr, + DMA_MEM_TO_DEV); + if (ret) + dev_err(dev, "Data transfer failed\n"); + ktime_get_ts64(&end); + + dma_unmap_single(dma_dev, src_phys_addr, map_size, + DMA_TO_DEVICE); + + if (ret) + goto unmap; + } else { + ktime_get_ts64(&start); + memcpy_toio(map.virt_addr, buf, map_size); + ktime_get_ts64(&end); + } - ret = pci_epf_test_data_transfer(epf_test, phys_addr, - src_phys_addr, reg->size, - reg->dst_addr, - DMA_MEM_TO_DEV); - if (ret) - dev_err(dev, "Data transfer failed\n"); - ktime_get_ts64(&end); + dst_size -= map_size; + dst_addr += map_size; + buf += map_size; - dma_unmap_single(dma_dev, src_phys_addr, reg->size, - DMA_TO_DEVICE); - } else { - ktime_get_ts64(&start); - memcpy_toio(dst_addr, buf, reg->size); - ktime_get_ts64(&end); + pci_epc_mem_unmap(epc, epf->func_no, epf->vfunc_no, &map); + map_size = 0; } - pci_epf_test_print_rate(epf_test, "WRITE", reg->size, &start, &end, - reg->flags & FLAG_USE_DMA); + pci_epf_test_print_rate(epf_test, "WRITE", reg->size, &start, + &end, reg->flags & FLAG_USE_DMA); /* * wait 1ms inorder for the write to complete. Without this delay L3 @@ -568,16 +586,14 @@ static void pci_epf_test_write(struct pci_epf_test *epf_test, */ usleep_range(1000, 2000); -err_dma_map: - kfree(buf); - -err_map_addr: - pci_epc_unmap_addr(epc, epf->func_no, epf->vfunc_no, phys_addr); +unmap: + if (map_size) + pci_epc_mem_unmap(epc, epf->func_no, epf->vfunc_no, &map); -err_addr: - pci_epc_mem_free_addr(epc, phys_addr, dst_addr, reg->size); +free_buf: + kfree(dst_buf); -err: +set_status: if (!ret) reg->status |= STATUS_WRITE_SUCCESS; else