Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 315 insertions, 0 deletions

diff --git a/crypto/zstd.c b/crypto/zstd.c
new file mode 100644
index 000000000..556f5d2bd
--- /dev/null
+++ b/crypto/zstd.c
@@ -0,0 +1,315 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Cryptographic API.
+ *
+ * Copyright (c) 2017-present, Facebook, Inc.
+ */
+#include <linux/crypto.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/net.h>
+#include <linux/overflow.h>
+#include <linux/vmalloc.h>
+#include <linux/zstd.h>
+#include <crypto/internal/acompress.h>
+#include <crypto/scatterwalk.h>
+
+
+#define ZSTD_DEF_LEVEL		3
+#define ZSTD_MAX_WINDOWLOG	18
+#define ZSTD_MAX_SIZE		BIT(ZSTD_MAX_WINDOWLOG)
+
+struct zstd_ctx {
+	zstd_cctx *cctx;
+	zstd_dctx *dctx;
+	size_t wksp_size;
+	zstd_parameters params;
+	u8 wksp[] __aligned(8) __counted_by(wksp_size);
+};
+
+static DEFINE_MUTEX(zstd_stream_lock);
+
+static void *zstd_alloc_stream(void)
+{
+	zstd_parameters params;
+	struct zstd_ctx *ctx;
+	size_t wksp_size;
+
+	params = zstd_get_params(ZSTD_DEF_LEVEL, ZSTD_MAX_SIZE);
+
+	wksp_size = max(zstd_cstream_workspace_bound(&params.cParams),
+			zstd_dstream_workspace_bound(ZSTD_MAX_SIZE));
+	if (!wksp_size)
+		return ERR_PTR(-EINVAL);
+
+	ctx = kvmalloc_flex(*ctx, wksp, wksp_size);
+	if (!ctx)
+		return ERR_PTR(-ENOMEM);
+
+	ctx->params = params;
+	ctx->wksp_size = wksp_size;
+
+	return ctx;
+}
+
+static void zstd_free_stream(void *ctx)
+{
+	kvfree(ctx);
+}
+
+static struct crypto_acomp_streams zstd_streams = {
+	.alloc_ctx = zstd_alloc_stream,
+	.free_ctx = zstd_free_stream,
+};
+
+static int zstd_init(struct crypto_acomp *acomp_tfm)
+{
+	int ret = 0;
+
+	mutex_lock(&zstd_stream_lock);
+	ret = crypto_acomp_alloc_streams(&zstd_streams);
+	mutex_unlock(&zstd_stream_lock);
+
+	return ret;
+}
+
+static int zstd_compress_one(struct acomp_req *req, struct zstd_ctx *ctx,
+			     const void *src, void *dst, unsigned int *dlen)
+{
+	size_t out_len;
+
+	ctx->cctx = zstd_init_cctx(ctx->wksp, ctx->wksp_size);
+	if (!ctx->cctx)
+		return -EINVAL;
+
+	out_len = zstd_compress_cctx(ctx->cctx, dst, req->dlen, src, req->slen,
+				     &ctx->params);
+	if (zstd_is_error(out_len))
+		return -EINVAL;
+
+	*dlen = out_len;
+
+	return 0;
+}
+
+static int zstd_compress(struct acomp_req *req)
+{
+	struct crypto_acomp_stream *s;
+	unsigned int pos, scur, dcur;
+	unsigned int total_out = 0;
+	bool data_available = true;
+	zstd_out_buffer outbuf;
+	struct acomp_walk walk;
+	zstd_in_buffer inbuf;
+	struct zstd_ctx *ctx;
+	size_t pending_bytes;
+	size_t num_bytes;
+	int ret;
+
+	s = crypto_acomp_lock_stream_bh(&zstd_streams);
+	ctx = s->ctx;
+
+	ret = acomp_walk_virt(&walk, req, true);
+	if (ret)
+		goto out;
+
+	ctx->cctx = zstd_init_cstream(&ctx->params, 0, ctx->wksp, ctx->wksp_size);
+	if (!ctx->cctx) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	do {
+		dcur = acomp_walk_next_dst(&walk);
+		if (!dcur) {
+			ret = -ENOSPC;
+			goto out;
+		}
+
+		outbuf.pos = 0;
+		outbuf.dst = (u8 *)walk.dst.virt.addr;
+		outbuf.size = dcur;
+
+		do {
+			scur = acomp_walk_next_src(&walk);
+			if (dcur == req->dlen && scur == req->slen) {
+				ret = zstd_compress_one(req, ctx, walk.src.virt.addr,
+							walk.dst.virt.addr, &total_out);
+				acomp_walk_done_src(&walk, scur);
+				acomp_walk_done_dst(&walk, dcur);
+				goto out;
+			}
+
+			if (scur) {
+				inbuf.pos = 0;
+				inbuf.src = walk.src.virt.addr;
+				inbuf.size = scur;
+			} else {
+				data_available = false;
+				break;
+			}
+
+			num_bytes = zstd_compress_stream(ctx->cctx, &outbuf, &inbuf);
+			if (ZSTD_isError(num_bytes)) {
+				ret = -EIO;
+				goto out;
+			}
+
+			pending_bytes = zstd_flush_stream(ctx->cctx, &outbuf);
+			if (ZSTD_isError(pending_bytes)) {
+				ret = -EIO;
+				goto out;
+			}
+			acomp_walk_done_src(&walk, inbuf.pos);
+		} while (dcur != outbuf.pos);
+
+		total_out += outbuf.pos;
+		acomp_walk_done_dst(&walk, dcur);
+	} while (data_available);
+
+	pos = outbuf.pos;
+	num_bytes = zstd_end_stream(ctx->cctx, &outbuf);
+	if (ZSTD_isError(num_bytes))
+		ret = -EIO;
+	else
+		total_out += (outbuf.pos - pos);
+
+out:
+	if (ret)
+		req->dlen = 0;
+	else
+		req->dlen = total_out;
+
+	crypto_acomp_unlock_stream_bh(s);
+
+	return ret;
+}
+
+static int zstd_decompress_one(struct acomp_req *req, struct zstd_ctx *ctx,
+			       const void *src, void *dst, unsigned int *dlen)
+{
+	size_t out_len;
+
+	ctx->dctx = zstd_init_dctx(ctx->wksp, ctx->wksp_size);
+	if (!ctx->dctx)
+		return -EINVAL;
+
+	out_len = zstd_decompress_dctx(ctx->dctx, dst, req->dlen, src, req->slen);
+	if (zstd_is_error(out_len))
+		return -EINVAL;
+
+	*dlen = out_len;
+
+	return 0;
+}
+
+static int zstd_decompress(struct acomp_req *req)
+{
+	struct crypto_acomp_stream *s;
+	unsigned int total_out = 0;
+	unsigned int scur, dcur;
+	zstd_out_buffer outbuf;
+	struct acomp_walk walk;
+	zstd_in_buffer inbuf;
+	struct zstd_ctx *ctx;
+	size_t pending_bytes;
+	int ret;
+
+	s = crypto_acomp_lock_stream_bh(&zstd_streams);
+	ctx = s->ctx;
+
+	ret = acomp_walk_virt(&walk, req, true);
+	if (ret)
+		goto out;
+
+	ctx->dctx = zstd_init_dstream(ZSTD_MAX_SIZE, ctx->wksp, ctx->wksp_size);
+	if (!ctx->dctx) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	do {
+		scur = acomp_walk_next_src(&walk);
+		if (scur) {
+			inbuf.pos = 0;
+			inbuf.size = scur;
+			inbuf.src = walk.src.virt.addr;
+		} else {
+			break;
+		}
+
+		do {
+			dcur = acomp_walk_next_dst(&walk);
+			if (dcur == req->dlen && scur == req->slen) {
+				ret = zstd_decompress_one(req, ctx, walk.src.virt.addr,
+							  walk.dst.virt.addr, &total_out);
+				acomp_walk_done_dst(&walk, dcur);
+				acomp_walk_done_src(&walk, scur);
+				goto out;
+			}
+
+			if (!dcur) {
+				ret = -ENOSPC;
+				goto out;
+			}
+
+			outbuf.pos = 0;
+			outbuf.dst = (u8 *)walk.dst.virt.addr;
+			outbuf.size = dcur;
+
+			pending_bytes = zstd_decompress_stream(ctx->dctx, &outbuf, &inbuf);
+			if (ZSTD_isError(pending_bytes)) {
+				ret = -EIO;
+				goto out;
+			}
+
+			total_out += outbuf.pos;
+
+			acomp_walk_done_dst(&walk, outbuf.pos);
+		} while (inbuf.pos != scur);
+
+		acomp_walk_done_src(&walk, scur);
+	} while (ret == 0);
+
+out:
+	if (ret)
+		req->dlen = 0;
+	else
+		req->dlen = total_out;
+
+	crypto_acomp_unlock_stream_bh(s);
+
+	return ret;
+}
+
+static struct acomp_alg zstd_acomp = {
+	.base = {
+		.cra_name = "zstd",
+		.cra_driver_name = "zstd-generic",
+		.cra_flags = CRYPTO_ALG_REQ_VIRT,
+		.cra_module = THIS_MODULE,
+	},
+	.init = zstd_init,
+	.compress = zstd_compress,
+	.decompress = zstd_decompress,
+};
+
+static int __init zstd_mod_init(void)
+{
+	return crypto_register_acomp(&zstd_acomp);
+}
+
+static void __exit zstd_mod_fini(void)
+{
+	crypto_unregister_acomp(&zstd_acomp);
+	crypto_acomp_free_streams(&zstd_streams);
+}
+
+module_init(zstd_mod_init);
+module_exit(zstd_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Zstd Compression Algorithm");
+MODULE_ALIAS_CRYPTO("zstd");