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Date: Thu, 3 Mar 2022 06:09:47 +0800
From: kernel test robot <lkp@...el.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Alex Elder <elder@...aro.org>
Subject: [mani-mhi:mhi-next 17/30] drivers/bus/mhi/ep/ring.c:45:66: sparse:
sparse: incorrect type in argument 3 (different address spaces)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi.git mhi-next
head: 4aa2b597db8f8808b7e0f89239cd98c3a56b21b1
commit: 118a636617aad5e65564efd8c11c60ed1a45e494 [17/30] bus: mhi: ep: Add support for ring management
config: ia64-randconfig-s031-20220302 (https://download.01.org/0day-ci/archive/20220303/202203030603.3nhJUwR0-lkp@intel.com/config)
compiler: ia64-linux-gcc (GCC) 11.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi.git/commit/?id=118a636617aad5e65564efd8c11c60ed1a45e494
git remote add mani-mhi https://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi.git
git fetch --no-tags mani-mhi mhi-next
git checkout 118a636617aad5e65564efd8c11c60ed1a45e494
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/bus/mhi/ep/ drivers/nvmem/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
>> drivers/bus/mhi/ep/ring.c:45:66: sparse: sparse: incorrect type in argument 3 (different address spaces) @@ expected void [noderef] __iomem *to @@ got struct mhi_ring_element * @@
drivers/bus/mhi/ep/ring.c:45:66: sparse: expected void [noderef] __iomem *to
drivers/bus/mhi/ep/ring.c:45:66: sparse: got struct mhi_ring_element *
drivers/bus/mhi/ep/ring.c:52:66: sparse: sparse: incorrect type in argument 3 (different address spaces) @@ expected void [noderef] __iomem *to @@ got struct mhi_ring_element * @@
drivers/bus/mhi/ep/ring.c:52:66: sparse: expected void [noderef] __iomem *to
drivers/bus/mhi/ep/ring.c:52:66: sparse: got struct mhi_ring_element *
drivers/bus/mhi/ep/ring.c:58:74: sparse: sparse: incorrect type in argument 3 (different address spaces) @@ expected void [noderef] __iomem *to @@ got struct mhi_ring_element * @@
drivers/bus/mhi/ep/ring.c:58:74: sparse: expected void [noderef] __iomem *to
drivers/bus/mhi/ep/ring.c:58:74: sparse: got struct mhi_ring_element *
>> drivers/bus/mhi/ep/ring.c:130:51: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __iomem *from @@ got struct mhi_ring_element *el @@
drivers/bus/mhi/ep/ring.c:130:51: sparse: expected void [noderef] __iomem *from
drivers/bus/mhi/ep/ring.c:130:51: sparse: got struct mhi_ring_element *el
vim +45 drivers/bus/mhi/ep/ring.c
24
25 static int __mhi_ep_cache_ring(struct mhi_ep_ring *ring, size_t end)
26 {
27 struct mhi_ep_cntrl *mhi_cntrl = ring->mhi_cntrl;
28 struct device *dev = &mhi_cntrl->mhi_dev->dev;
29 size_t start, copy_size;
30 int ret;
31
32 /* Don't proceed in the case of event ring. This happens during mhi_ep_ring_start(). */
33 if (ring->type == RING_TYPE_ER)
34 return 0;
35
36 /* No need to cache the ring if write pointer is unmodified */
37 if (ring->wr_offset == end)
38 return 0;
39
40 start = ring->wr_offset;
41 if (start < end) {
42 copy_size = (end - start) * sizeof(struct mhi_ring_element);
43 ret = mhi_cntrl->read_from_host(mhi_cntrl, ring->rbase +
44 (start * sizeof(struct mhi_ring_element)),
> 45 &ring->ring_cache[start], copy_size);
46 if (ret < 0)
47 return ret;
48 } else {
49 copy_size = (ring->ring_size - start) * sizeof(struct mhi_ring_element);
50 ret = mhi_cntrl->read_from_host(mhi_cntrl, ring->rbase +
51 (start * sizeof(struct mhi_ring_element)),
52 &ring->ring_cache[start], copy_size);
53 if (ret < 0)
54 return ret;
55
56 if (end) {
57 ret = mhi_cntrl->read_from_host(mhi_cntrl, ring->rbase,
58 &ring->ring_cache[0],
59 end * sizeof(struct mhi_ring_element));
60 if (ret < 0)
61 return ret;
62 }
63 }
64
65 dev_dbg(dev, "Cached ring: start %zu end %zu size %zu\n", start, end, copy_size);
66
67 return 0;
68 }
69
70 static int mhi_ep_cache_ring(struct mhi_ep_ring *ring, u64 wr_ptr)
71 {
72 size_t wr_offset;
73 int ret;
74
75 wr_offset = mhi_ep_ring_addr2offset(ring, wr_ptr);
76
77 /* Cache the host ring till write offset */
78 ret = __mhi_ep_cache_ring(ring, wr_offset);
79 if (ret)
80 return ret;
81
82 ring->wr_offset = wr_offset;
83
84 return 0;
85 }
86
87 int mhi_ep_update_wr_offset(struct mhi_ep_ring *ring)
88 {
89 u64 wr_ptr;
90
91 wr_ptr = mhi_ep_mmio_get_db(ring);
92
93 return mhi_ep_cache_ring(ring, wr_ptr);
94 }
95
96 /* TODO: Support for adding multiple ring elements to the ring */
97 int mhi_ep_ring_add_element(struct mhi_ep_ring *ring, struct mhi_ring_element *el)
98 {
99 struct mhi_ep_cntrl *mhi_cntrl = ring->mhi_cntrl;
100 struct device *dev = &mhi_cntrl->mhi_dev->dev;
101 size_t old_offset = 0;
102 u32 num_free_elem;
103 int ret;
104
105 ret = mhi_ep_update_wr_offset(ring);
106 if (ret) {
107 dev_err(dev, "Error updating write pointer\n");
108 return ret;
109 }
110
111 if (ring->rd_offset < ring->wr_offset)
112 num_free_elem = (ring->wr_offset - ring->rd_offset) - 1;
113 else
114 num_free_elem = ((ring->ring_size - ring->rd_offset) + ring->wr_offset) - 1;
115
116 /* Check if there is space in ring for adding at least an element */
117 if (!num_free_elem) {
118 dev_err(dev, "No space left in the ring\n");
119 return -ENOSPC;
120 }
121
122 old_offset = ring->rd_offset;
123 mhi_ep_ring_inc_index(ring);
124
125 dev_dbg(dev, "Adding an element to ring at offset (%zu)\n", ring->rd_offset);
126
127 /* Update rp in ring context */
128 ring->ring_ctx->generic.rp = cpu_to_le64((ring->rd_offset * sizeof(*el)) + ring->rbase);
129
> 130 ret = mhi_cntrl->write_to_host(mhi_cntrl, el, ring->rbase + (old_offset * sizeof(*el)),
131 sizeof(*el));
132 if (ret < 0)
133 return ret;
134
135 return 0;
136 }
137
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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