Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1 | From 996e6bae70ec2ce04061daab23f20e9c353c4227 Mon Sep 17 00:00:00 2001 |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 2 | From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com> |
| 3 | Date: Tue, 18 Jan 2022 15:11:46 +0000 |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 4 | Subject: [PATCH 34/40] ANDROID: trusty-ffa: Add support for FFA memory |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 5 | operations |
| 6 | |
| 7 | Initializes Trusty mem_ops with FFA memory operations for share, |
| 8 | lend, reclaim. |
| 9 | |
| 10 | Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com> |
| 11 | Change-Id: Id3a1eb5ae8e4721cb983c624773d39bafe25a77d |
| 12 | Upstream-Status: Pending [Not submitted to upstream yet] |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 13 | Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 14 | --- |
| 15 | drivers/trusty/trusty-ffa.c | 102 ++++++++++++++++++++++++++++++++++++ |
| 16 | drivers/trusty/trusty.c | 5 ++ |
| 17 | 2 files changed, 107 insertions(+) |
| 18 | |
| 19 | diff --git a/drivers/trusty/trusty-ffa.c b/drivers/trusty/trusty-ffa.c |
| 20 | index c8c16a1fc700..0655b3887b52 100644 |
| 21 | --- a/drivers/trusty/trusty-ffa.c |
| 22 | +++ b/drivers/trusty/trusty-ffa.c |
| 23 | @@ -15,8 +15,110 @@ |
| 24 | #include "trusty-ffa.h" |
| 25 | #include "trusty-private.h" |
| 26 | |
| 27 | +static int __trusty_ffa_share_memory(struct device *dev, u64 *id, |
| 28 | + struct scatterlist *sglist, |
| 29 | + unsigned int nents, pgprot_t pgprot, |
| 30 | + u64 tag, bool share) |
| 31 | +{ |
| 32 | + struct trusty_state *s = platform_get_drvdata(to_platform_device(dev)); |
| 33 | + int ret; |
| 34 | + struct scatterlist *sg; |
| 35 | + size_t count; |
| 36 | + struct ffa_device *ffa_dev = to_ffa_dev(s->ffa->dev); |
| 37 | + const struct ffa_dev_ops *ffa_ops = s->ffa->ops; |
| 38 | + struct ffa_mem_region_attributes ffa_mem_attr; |
| 39 | + struct ffa_mem_ops_args ffa_mem_args; |
| 40 | + |
| 41 | + if (WARN_ON(nents < 1)) |
| 42 | + return -EINVAL; |
| 43 | + |
| 44 | + count = dma_map_sg(dev, sglist, nents, DMA_BIDIRECTIONAL); |
| 45 | + if (count != nents) { |
| 46 | + dev_err(s->dev, "failed to dma map sg_table\n"); |
| 47 | + return -EINVAL; |
| 48 | + } |
| 49 | + |
| 50 | + sg = sglist; |
| 51 | + |
| 52 | + mutex_lock(&s->ffa->share_memory_msg_lock); |
| 53 | + |
| 54 | + ffa_mem_attr.receiver = ffa_dev->vm_id; |
| 55 | + ffa_mem_attr.attrs = FFA_MEM_RW; |
| 56 | + |
| 57 | + ffa_mem_args.use_txbuf = 1; |
| 58 | + ffa_mem_args.tag = tag; |
| 59 | + ffa_mem_args.attrs = &ffa_mem_attr; |
| 60 | + ffa_mem_args.nattrs = 1; |
| 61 | + ffa_mem_args.sg = sg; |
| 62 | + ffa_mem_args.flags = 0; |
| 63 | + |
| 64 | + if (share) { |
| 65 | + ret = ffa_ops->memory_share(ffa_dev, &ffa_mem_args); |
| 66 | + } else { |
| 67 | + ret = ffa_ops->memory_lend(ffa_dev, &ffa_mem_args); |
| 68 | + } |
| 69 | + |
| 70 | + mutex_unlock(&s->ffa->share_memory_msg_lock); |
| 71 | + |
| 72 | + if (!ret) { |
| 73 | + *id = ffa_mem_args.g_handle; |
| 74 | + dev_dbg(s->dev, "%s: done\n", __func__); |
| 75 | + return 0; |
| 76 | + } |
| 77 | + |
| 78 | + dev_err(s->dev, "%s: failed %d", __func__, ret); |
| 79 | + |
| 80 | + dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL); |
| 81 | + return ret; |
| 82 | +} |
| 83 | + |
| 84 | +static int trusty_ffa_share_memory(struct device *dev, u64 *id, |
| 85 | + struct scatterlist *sglist, |
| 86 | + unsigned int nents, pgprot_t pgprot, u64 tag) |
| 87 | +{ |
| 88 | + return __trusty_ffa_share_memory(dev, id, sglist, nents, pgprot, tag, |
| 89 | + true); |
| 90 | +} |
| 91 | + |
| 92 | +static int trusty_ffa_lend_memory(struct device *dev, u64 *id, |
| 93 | + struct scatterlist *sglist, |
| 94 | + unsigned int nents, pgprot_t pgprot, u64 tag) |
| 95 | +{ |
| 96 | + return __trusty_ffa_share_memory(dev, id, sglist, nents, pgprot, tag, |
| 97 | + false); |
| 98 | +} |
| 99 | + |
| 100 | +static int trusty_ffa_reclaim_memory(struct device *dev, u64 id, |
| 101 | + struct scatterlist *sglist, |
| 102 | + unsigned int nents) |
| 103 | +{ |
| 104 | + struct trusty_state *s = platform_get_drvdata(to_platform_device(dev)); |
| 105 | + int ret = 0; |
| 106 | + const struct ffa_dev_ops *ffa_ops = s->ffa->ops; |
| 107 | + |
| 108 | + if (WARN_ON(nents < 1)) |
| 109 | + return -EINVAL; |
| 110 | + |
| 111 | + mutex_lock(&s->ffa->share_memory_msg_lock); |
| 112 | + |
| 113 | + ret = ffa_ops->memory_reclaim(id, 0); |
| 114 | + |
| 115 | + mutex_unlock(&s->ffa->share_memory_msg_lock); |
| 116 | + |
| 117 | + if (ret != 0) |
| 118 | + return ret; |
| 119 | + |
| 120 | + dma_unmap_sg(dev, sglist, nents, DMA_BIDIRECTIONAL); |
| 121 | + |
| 122 | + dev_dbg(s->dev, "%s: done\n", __func__); |
| 123 | + return 0; |
| 124 | +} |
| 125 | + |
| 126 | static const struct trusty_mem_ops trusty_ffa_mem_ops = { |
| 127 | .desc = &trusty_ffa_transport, |
| 128 | + .trusty_share_memory = &trusty_ffa_share_memory, |
| 129 | + .trusty_lend_memory = &trusty_ffa_lend_memory, |
| 130 | + .trusty_reclaim_memory = &trusty_ffa_reclaim_memory, |
| 131 | }; |
| 132 | |
| 133 | static const struct ffa_device_id trusty_ffa_device_id[] = { |
| 134 | diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c |
| 135 | index 4686b0d34f61..f91c255c9897 100644 |
| 136 | --- a/drivers/trusty/trusty.c |
| 137 | +++ b/drivers/trusty/trusty.c |
| 138 | @@ -674,6 +674,11 @@ static int trusty_remove(struct platform_device *pdev) |
| 139 | * |
| 140 | * For Trusty API version < TRUSTY_API_VERSION_MEM_OBJ: |
| 141 | * trusty_smc_transport used for messaging. |
| 142 | + * |
| 143 | + * For Trusty API version == TRUSTY_API_VERSION_MEM_OBJ: |
| 144 | + * trusty_smc_transport used for messaging. |
| 145 | + * trusty_ffa_transport used for memory sharing. |
| 146 | + * |
| 147 | */ |
| 148 | static const trusty_transports_t trusty_transports[] = { |
| 149 | &trusty_smc_transport, |
| 150 | -- |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 151 | 2.34.1 |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 152 | |