From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 3B3F44A0F02 for ; Tue, 1 Sep 2026 19:28:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788290905; cv=none; b=SlSMM9qBUa+iUcGoVz1/b6Ynj84K1coC9bC1EsApdPITWvm9Frh9OpPbmHRK57RYmjlXetl7/aKnXMVfdjMmqPbhqI/8cySwyQCDujIUfOMp6luk9UN+r++Y0Q6eWeRIDelkbgXpzuHNYshpAw1lGmn8rJcsBA0KKTHwzB6EUWM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788290905; c=relaxed/simple; bh=+Jl4Dwa7CmLa7TJmt2tQb9XHPF6OQH73sYZiBFFmrBc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cfuf5qSYeW7zgZ1o1pIJpZE4e2S9upZQjpBopAbd124vwqRwf2rmLBg6x/8+6/CJOsyTbDkBJ04qrpK3e6Fm7InmpdLbhzWtc+1+1+3xCd2n9bpxF7CCiLNJNmK20WbfFyLRGUpOPph4dMEB/TVpflllPj1itQVxhAZ62KXsBaA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lCNy6gM0; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lCNy6gM0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 258C21F000E9; Tue, 1 Sep 2026 19:28:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788290903; bh=MGrqGQxllTCJ59MTWcJuiWktqmh9ZpuHoEsoG1yvObQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=lCNy6gM0HmmAVro1AqcrP4hHrSsGa/dO+WMHDi68FkGWxQdOewYhR5RAUkiX/qXy1 KgVE4+eDKL2eZytdgsjf+xJBUq3B7QGdsEn1bv2sAQZ9CGJpHMeMdfDLsjunH2GDg2 h93Hm4RJTIDvfj+7rVWtxtxuX4DgF5c8/69fMke601DG3A7DpGdCIf+x3zN2BO/zC7 7J5NWi+jNFERd1gSM8K1q6f4c2rUjYLp4a2KxHtdxNRVQS5clXhicfWIIqOKInsq/r k3WuTRSDmUgMmm3nwnBUc1wYgAK+cB9xMdrjyNmSRO/3zxK591LB5J9QtMsBElNTKR rPuIjo6PYKZ8Q== From: Sasha Levin To: stable@vger.kernel.org Cc: Giovanni Cabiddu , Vinicius Costa Gomes , Herbert Xu , Sasha Levin Subject: [PATCH 7.1.y 1/2] crypto: iaa - fall back to software for multi-entry scatterlists Date: Tue, 1 Sep 2026 15:28:20 -0400 Message-ID: <20260901192821.1439160-1-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <2026083134-rockband-cone-6be0@gregkh> References: <2026083134-rockband-cone-6be0@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Giovanni Cabiddu [ Upstream commit c7fdfd2bee1cf1448e5244da1a734e680f634b02 ] IAA cannot process source or destination scatterlists with more than one entry directly. Instead of failing these requests, route them through a separate deflate acomp transform and keep the request alive in software. The IAA driver has never handled multi-entry scatterlists, but the limitation was latent until commit e2c3b6b21c77 ("mm: zswap: use SG list decompression APIs from zsmalloc") made zswap pass the raw zsmalloc SG list directly to crypto drivers, so objects spanning multiple pages now reach IAA as multi-entry sources and would otherwise fail decompression. Fallback to the generic DEFLATE implementation for scatterlists with more than one entry. After the multi-entry cases fall back early, simplify the DMA mapping path to a single scatterlist entry and fall back on mapping failure as well. Add counters to track the number of requests processed by the software implementation on the compression direction. Fixes: 2ec6761df889 ("crypto: iaa - Add support for deflate-iaa compression algorithm") Fixes: e2c3b6b21c77 ("mm: zswap: use SG list decompression APIs from zsmalloc") Cc: stable@vger.kernel.org Signed-off-by: Giovanni Cabiddu Signed-off-by: Vinicius Costa Gomes Signed-off-by: Herbert Xu Stable-dep-of: 94a259304771 ("crypto: iaa - unmap dst before software fallback on decompress") Signed-off-by: Sasha Levin --- drivers/crypto/intel/iaa/iaa_crypto_main.c | 111 +++++++++++--------- drivers/crypto/intel/iaa/iaa_crypto_stats.c | 9 ++ drivers/crypto/intel/iaa/iaa_crypto_stats.h | 2 + 3 files changed, 71 insertions(+), 51 deletions(-) diff --git a/drivers/crypto/intel/iaa/iaa_crypto_main.c b/drivers/crypto/intel/iaa/iaa_crypto_main.c index f62b994e18e58..904d9413ba182 100644 --- a/drivers/crypto/intel/iaa/iaa_crypto_main.c +++ b/drivers/crypto/intel/iaa/iaa_crypto_main.c @@ -2,6 +2,7 @@ /* Copyright(c) 2021 Intel Corporation. All rights rsvd. */ #include +#include #include #include #include @@ -996,6 +997,19 @@ static int deflate_generic_decompress(struct acomp_req *req) return ret; } +static int deflate_generic_compress(struct acomp_req *req) +{ + ACOMP_FBREQ_ON_STACK(fbreq, req); + int ret; + + ret = crypto_acomp_compress(fbreq); + req->dlen = fbreq->dlen; + + update_total_sw_comp_calls(); + + return ret; +} + static int iaa_remap_for_verify(struct device *dev, struct iaa_wq *iaa_wq, struct acomp_req *req, dma_addr_t *src_addr, dma_addr_t *dst_addr); @@ -1472,7 +1486,7 @@ static int iaa_comp_acompress(struct acomp_req *req) struct iaa_compression_ctx *compression_ctx; struct crypto_tfm *tfm = req->base.tfm; dma_addr_t src_addr, dst_addr; - int nr_sgs, cpu, ret = 0; + int cpu, ret = 0; struct iaa_wq *iaa_wq; struct idxd_wq *wq; struct device *dev; @@ -1484,11 +1498,15 @@ static int iaa_comp_acompress(struct acomp_req *req) return -ENODEV; } - if (!req->src || !req->slen) { - pr_debug("invalid src, not compressing\n"); + if (!req->src || !req->slen || !req->dst) { + pr_debug("invalid req, not compressing\n"); return -EINVAL; } + /* Fall back to software if src or dst has multiple sg entries */ + if (sg_nents(req->src) > 1 || sg_nents(req->dst) > 1) + return deflate_generic_compress(req); + cpu = get_cpu(); wq = wq_table_next_wq(cpu); put_cpu(); @@ -1507,30 +1525,25 @@ static int iaa_comp_acompress(struct acomp_req *req) dev = &wq->idxd->pdev->dev; - nr_sgs = dma_map_sg(dev, req->src, sg_nents(req->src), DMA_TO_DEVICE); - if (nr_sgs <= 0 || nr_sgs > 1) { - dev_dbg(dev, "couldn't map src sg for iaa device %d," - " wq %d: ret=%d\n", iaa_wq->iaa_device->idxd->id, - iaa_wq->wq->id, ret); - ret = -EIO; - goto out; + if (!dma_map_sg(dev, req->src, 1, DMA_TO_DEVICE)) { + dev_dbg(dev, "couldn't map src sg for iaa device %d, wq %d\n", + iaa_wq->iaa_device->idxd->id, iaa_wq->wq->id); + iaa_wq_put(wq); + return deflate_generic_compress(req); } src_addr = sg_dma_address(req->src); - dev_dbg(dev, "dma_map_sg, src_addr %llx, nr_sgs %d, req->src %p," - " req->slen %d, sg_dma_len(sg) %d\n", src_addr, nr_sgs, + dev_dbg(dev, "map src %llx req->src %p slen %d sg_len %d\n", src_addr, req->src, req->slen, sg_dma_len(req->src)); - nr_sgs = dma_map_sg(dev, req->dst, sg_nents(req->dst), DMA_FROM_DEVICE); - if (nr_sgs <= 0 || nr_sgs > 1) { - dev_dbg(dev, "couldn't map dst sg for iaa device %d," - " wq %d: ret=%d\n", iaa_wq->iaa_device->idxd->id, - iaa_wq->wq->id, ret); - ret = -EIO; - goto err_map_dst; + if (!dma_map_sg(dev, req->dst, 1, DMA_FROM_DEVICE)) { + dev_dbg(dev, "couldn't map dst sg for iaa device %d, wq %d\n", + iaa_wq->iaa_device->idxd->id, iaa_wq->wq->id); + dma_unmap_sg(dev, req->src, 1, DMA_TO_DEVICE); + iaa_wq_put(wq); + return deflate_generic_compress(req); } dst_addr = sg_dma_address(req->dst); - dev_dbg(dev, "dma_map_sg, dst_addr %llx, nr_sgs %d, req->dst %p," - " req->dlen %d, sg_dma_len(sg) %d\n", dst_addr, nr_sgs, + dev_dbg(dev, "map dst %llx req->dst %p dlen %d sg_len %d\n", dst_addr, req->dst, req->dlen, sg_dma_len(req->dst)); ret = iaa_compress(tfm, req, wq, src_addr, req->slen, dst_addr, @@ -1550,8 +1563,8 @@ static int iaa_comp_acompress(struct acomp_req *req) if (ret) dev_dbg(dev, "asynchronous compress verification failed ret=%d\n", ret); - dma_unmap_sg(dev, req->dst, sg_nents(req->dst), DMA_TO_DEVICE); - dma_unmap_sg(dev, req->src, sg_nents(req->src), DMA_FROM_DEVICE); + dma_unmap_sg(dev, req->dst, 1, DMA_TO_DEVICE); + dma_unmap_sg(dev, req->src, 1, DMA_FROM_DEVICE); goto out; } @@ -1559,9 +1572,8 @@ static int iaa_comp_acompress(struct acomp_req *req) if (ret) dev_dbg(dev, "asynchronous compress failed ret=%d\n", ret); - dma_unmap_sg(dev, req->dst, sg_nents(req->dst), DMA_FROM_DEVICE); -err_map_dst: - dma_unmap_sg(dev, req->src, sg_nents(req->src), DMA_TO_DEVICE); + dma_unmap_sg(dev, req->dst, 1, DMA_FROM_DEVICE); + dma_unmap_sg(dev, req->src, 1, DMA_TO_DEVICE); out: iaa_wq_put(wq); @@ -1572,7 +1584,7 @@ static int iaa_comp_adecompress(struct acomp_req *req) { struct crypto_tfm *tfm = req->base.tfm; dma_addr_t src_addr, dst_addr; - int nr_sgs, cpu, ret = 0; + int cpu, ret = 0; struct iaa_wq *iaa_wq; struct device *dev; struct idxd_wq *wq; @@ -1582,11 +1594,15 @@ static int iaa_comp_adecompress(struct acomp_req *req) return -ENODEV; } - if (!req->src || !req->slen) { - pr_debug("invalid src, not decompressing\n"); + if (!req->src || !req->slen || !req->dst) { + pr_debug("invalid req, not decompressing\n"); return -EINVAL; } + /* Fall back to software if src or dst has multiple sg entries */ + if (sg_nents(req->src) > 1 || sg_nents(req->dst) > 1) + return deflate_generic_decompress(req); + cpu = get_cpu(); wq = wq_table_next_wq(cpu); put_cpu(); @@ -1605,30 +1621,25 @@ static int iaa_comp_adecompress(struct acomp_req *req) dev = &wq->idxd->pdev->dev; - nr_sgs = dma_map_sg(dev, req->src, sg_nents(req->src), DMA_TO_DEVICE); - if (nr_sgs <= 0 || nr_sgs > 1) { - dev_dbg(dev, "couldn't map src sg for iaa device %d," - " wq %d: ret=%d\n", iaa_wq->iaa_device->idxd->id, - iaa_wq->wq->id, ret); - ret = -EIO; - goto out; + if (!dma_map_sg(dev, req->src, 1, DMA_TO_DEVICE)) { + dev_dbg(dev, "couldn't map src sg for iaa device %d, wq %d\n", + iaa_wq->iaa_device->idxd->id, iaa_wq->wq->id); + iaa_wq_put(wq); + return deflate_generic_decompress(req); } src_addr = sg_dma_address(req->src); - dev_dbg(dev, "dma_map_sg, src_addr %llx, nr_sgs %d, req->src %p," - " req->slen %d, sg_dma_len(sg) %d\n", src_addr, nr_sgs, + dev_dbg(dev, "map src %llx req->src %p slen %d sg_len %d\n", src_addr, req->src, req->slen, sg_dma_len(req->src)); - nr_sgs = dma_map_sg(dev, req->dst, sg_nents(req->dst), DMA_FROM_DEVICE); - if (nr_sgs <= 0 || nr_sgs > 1) { - dev_dbg(dev, "couldn't map dst sg for iaa device %d," - " wq %d: ret=%d\n", iaa_wq->iaa_device->idxd->id, - iaa_wq->wq->id, ret); - ret = -EIO; - goto err_map_dst; + if (!dma_map_sg(dev, req->dst, 1, DMA_FROM_DEVICE)) { + dev_dbg(dev, "couldn't map dst sg for iaa device %d, wq %d\n", + iaa_wq->iaa_device->idxd->id, iaa_wq->wq->id); + dma_unmap_sg(dev, req->src, 1, DMA_TO_DEVICE); + iaa_wq_put(wq); + return deflate_generic_decompress(req); } dst_addr = sg_dma_address(req->dst); - dev_dbg(dev, "dma_map_sg, dst_addr %llx, nr_sgs %d, req->dst %p," - " req->dlen %d, sg_dma_len(sg) %d\n", dst_addr, nr_sgs, + dev_dbg(dev, "map dst %llx req->dst %p dlen %d sg_len %d\n", dst_addr, req->dst, req->dlen, sg_dma_len(req->dst)); ret = iaa_decompress(tfm, req, wq, src_addr, req->slen, @@ -1639,10 +1650,8 @@ static int iaa_comp_adecompress(struct acomp_req *req) if (ret != 0) dev_dbg(dev, "asynchronous decompress failed ret=%d\n", ret); - dma_unmap_sg(dev, req->dst, sg_nents(req->dst), DMA_FROM_DEVICE); -err_map_dst: - dma_unmap_sg(dev, req->src, sg_nents(req->src), DMA_TO_DEVICE); -out: + dma_unmap_sg(dev, req->dst, 1, DMA_FROM_DEVICE); + dma_unmap_sg(dev, req->src, 1, DMA_TO_DEVICE); iaa_wq_put(wq); return ret; diff --git a/drivers/crypto/intel/iaa/iaa_crypto_stats.c b/drivers/crypto/intel/iaa/iaa_crypto_stats.c index f5cc3d29ca19e..2f2ed88c88120 100644 --- a/drivers/crypto/intel/iaa/iaa_crypto_stats.c +++ b/drivers/crypto/intel/iaa/iaa_crypto_stats.c @@ -19,6 +19,7 @@ static atomic64_t total_comp_calls; static atomic64_t total_decomp_calls; +static atomic64_t total_sw_comp_calls; static atomic64_t total_sw_decomp_calls; static atomic64_t total_comp_bytes_out; static atomic64_t total_decomp_bytes_in; @@ -43,6 +44,11 @@ void update_total_decomp_calls(void) atomic64_inc(&total_decomp_calls); } +void update_total_sw_comp_calls(void) +{ + atomic64_inc(&total_sw_comp_calls); +} + void update_total_sw_decomp_calls(void) { atomic64_inc(&total_sw_decomp_calls); @@ -104,6 +110,7 @@ static void reset_iaa_crypto_stats(void) { atomic64_set(&total_comp_calls, 0); atomic64_set(&total_decomp_calls, 0); + atomic64_set(&total_sw_comp_calls, 0); atomic64_set(&total_sw_decomp_calls, 0); atomic64_set(&total_comp_bytes_out, 0); atomic64_set(&total_decomp_bytes_in, 0); @@ -174,6 +181,8 @@ static int global_stats_show(struct seq_file *m, void *v) atomic64_read(&total_comp_calls)); seq_printf(m, " total_decomp_calls: %llu\n", atomic64_read(&total_decomp_calls)); + seq_printf(m, " total_sw_comp_calls: %llu\n", + atomic64_read(&total_sw_comp_calls)); seq_printf(m, " total_sw_decomp_calls: %llu\n", atomic64_read(&total_sw_decomp_calls)); seq_printf(m, " total_comp_bytes_out: %llu\n", diff --git a/drivers/crypto/intel/iaa/iaa_crypto_stats.h b/drivers/crypto/intel/iaa/iaa_crypto_stats.h index 3787a5f507eb2..6e0c6f9939bfa 100644 --- a/drivers/crypto/intel/iaa/iaa_crypto_stats.h +++ b/drivers/crypto/intel/iaa/iaa_crypto_stats.h @@ -11,6 +11,7 @@ void iaa_crypto_debugfs_cleanup(void); void update_total_comp_calls(void); void update_total_comp_bytes_out(int n); void update_total_decomp_calls(void); +void update_total_sw_comp_calls(void); void update_total_sw_decomp_calls(void); void update_total_decomp_bytes_in(int n); void update_completion_einval_errs(void); @@ -29,6 +30,7 @@ static inline void iaa_crypto_debugfs_cleanup(void) {} static inline void update_total_comp_calls(void) {} static inline void update_total_comp_bytes_out(int n) {} static inline void update_total_decomp_calls(void) {} +static inline void update_total_sw_comp_calls(void) {} static inline void update_total_sw_decomp_calls(void) {} static inline void update_total_decomp_bytes_in(int n) {} static inline void update_completion_einval_errs(void) {} -- 2.53.0