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Message-Id: <20210920030811.57273-13-sireeshkodali1@gmail.com>
Date: Mon, 20 Sep 2021 08:38:06 +0530
From: Sireesh Kodali <sireeshkodali1@...il.com>
To: phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-msm@...r.kernel.org, elder@...nel.org
Cc: Sireesh Kodali <sireeshkodali1@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Subject: [RFC PATCH 12/17] net: ipa: Add support for IPA v2.x memory map
IPA v2.6L has an extra region to handle compression/decompression
acceleration. This region is used by some modems during modem init.
Signed-off-by: Sireesh Kodali <sireeshkodali1@...il.com>
---
drivers/net/ipa/ipa_mem.c | 36 ++++++++++++++++++++++++++++++------
drivers/net/ipa/ipa_mem.h | 5 ++++-
2 files changed, 34 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ipa/ipa_mem.c b/drivers/net/ipa/ipa_mem.c
index 8acc88070a6f..bfcdc7e08de2 100644
--- a/drivers/net/ipa/ipa_mem.c
+++ b/drivers/net/ipa/ipa_mem.c
@@ -84,7 +84,7 @@ int ipa_mem_setup(struct ipa *ipa)
/* Get a transaction to define the header memory region and to zero
* the processing context and modem memory regions.
*/
- trans = ipa_cmd_trans_alloc(ipa, 4);
+ trans = ipa_cmd_trans_alloc(ipa, 5);
if (!trans) {
dev_err(&ipa->pdev->dev, "no transaction for memory setup\n");
return -EBUSY;
@@ -107,8 +107,14 @@ int ipa_mem_setup(struct ipa *ipa)
ipa_mem_zero_region_add(trans, IPA_MEM_AP_PROC_CTX);
ipa_mem_zero_region_add(trans, IPA_MEM_MODEM);
+ ipa_mem_zero_region_add(trans, IPA_MEM_ZIP);
+
ipa_trans_commit_wait(trans);
+ /* On IPA version <=2.6L (except 2.5) there is no PROC_CTX. */
+ if (ipa->version != IPA_VERSION_2_5 && ipa->version <= IPA_VERSION_2_6L)
+ return 0;
+
/* Tell the hardware where the processing context area is located */
mem = ipa_mem_find(ipa, IPA_MEM_MODEM_PROC_CTX);
offset = ipa->mem_offset + mem->offset;
@@ -147,6 +153,11 @@ static bool ipa_mem_id_valid(struct ipa *ipa, enum ipa_mem_id mem_id)
case IPA_MEM_END_MARKER: /* pseudo region */
break;
+ case IPA_MEM_ZIP:
+ if (version == IPA_VERSION_2_6L)
+ return true;
+ break;
+
case IPA_MEM_STATS_TETHERING:
case IPA_MEM_STATS_DROP:
if (version < IPA_VERSION_4_0)
@@ -319,10 +330,15 @@ int ipa_mem_config(struct ipa *ipa)
/* Check the advertised location and size of the shared memory area */
val = ioread32(ipa->reg_virt + ipa_reg_shared_mem_size_offset(ipa->version));
- /* The fields in the register are in 8 byte units */
- ipa->mem_offset = 8 * u32_get_bits(val, SHARED_MEM_BADDR_FMASK);
- /* Make sure the end is within the region's mapped space */
- mem_size = 8 * u32_get_bits(val, SHARED_MEM_SIZE_FMASK);
+ if (IPA_VERSION_RANGE(ipa->version, 2_0, 2_6L)) {
+ /* The fields in the register are in 8 byte units */
+ ipa->mem_offset = 8 * u32_get_bits(val, SHARED_MEM_BADDR_FMASK);
+ /* Make sure the end is within the region's mapped space */
+ mem_size = 8 * u32_get_bits(val, SHARED_MEM_SIZE_FMASK);
+ } else {
+ ipa->mem_offset = u32_get_bits(val, SHARED_MEM_BADDR_FMASK);
+ mem_size = u32_get_bits(val, SHARED_MEM_SIZE_FMASK);
+ }
/* If the sizes don't match, issue a warning */
if (ipa->mem_offset + mem_size < ipa->mem_size) {
@@ -564,6 +580,10 @@ static int ipa_smem_init(struct ipa *ipa, u32 item, size_t size)
return -EINVAL;
}
+ /* IPA v2.6L does not use IOMMU */
+ if (ipa->version <= IPA_VERSION_2_6L)
+ return 0;
+
domain = iommu_get_domain_for_dev(dev);
if (!domain) {
dev_err(dev, "no IOMMU domain found for SMEM\n");
@@ -591,6 +611,9 @@ static void ipa_smem_exit(struct ipa *ipa)
struct device *dev = &ipa->pdev->dev;
struct iommu_domain *domain;
+ if (ipa->version <= IPA_VERSION_2_6L)
+ return;
+
domain = iommu_get_domain_for_dev(dev);
if (domain) {
size_t size;
@@ -622,7 +645,8 @@ int ipa_mem_init(struct ipa *ipa, const struct ipa_mem_data *mem_data)
ipa->mem_count = mem_data->local_count;
ipa->mem = mem_data->local;
- ret = dma_set_mask_and_coherent(&ipa->pdev->dev, DMA_BIT_MASK(64));
+ ret = dma_set_mask_and_coherent(&ipa->pdev->dev, IPA_IS_64BIT(ipa->version) ?
+ DMA_BIT_MASK(64) : DMA_BIT_MASK(32));
if (ret) {
dev_err(dev, "error %d setting DMA mask\n", ret);
return ret;
diff --git a/drivers/net/ipa/ipa_mem.h b/drivers/net/ipa/ipa_mem.h
index 570bfdd99bff..be91cb38b6a8 100644
--- a/drivers/net/ipa/ipa_mem.h
+++ b/drivers/net/ipa/ipa_mem.h
@@ -47,8 +47,10 @@ enum ipa_mem_id {
IPA_MEM_UC_INFO, /* 0 canaries */
IPA_MEM_V4_FILTER_HASHED, /* 2 canaries */
IPA_MEM_V4_FILTER, /* 2 canaries */
+ IPA_MEM_V4_FILTER_AP, /* 2 canaries (IPA v2.0) */
IPA_MEM_V6_FILTER_HASHED, /* 2 canaries */
IPA_MEM_V6_FILTER, /* 2 canaries */
+ IPA_MEM_V6_FILTER_AP, /* 0 canaries (IPA v2.0) */
IPA_MEM_V4_ROUTE_HASHED, /* 2 canaries */
IPA_MEM_V4_ROUTE, /* 2 canaries */
IPA_MEM_V6_ROUTE_HASHED, /* 2 canaries */
@@ -57,7 +59,8 @@ enum ipa_mem_id {
IPA_MEM_AP_HEADER, /* 0 canaries, optional */
IPA_MEM_MODEM_PROC_CTX, /* 2 canaries */
IPA_MEM_AP_PROC_CTX, /* 0 canaries */
- IPA_MEM_MODEM, /* 0/2 canaries */
+ IPA_MEM_ZIP, /* 1 canary (IPA v2.6L) */
+ IPA_MEM_MODEM, /* 0-2 canaries */
IPA_MEM_UC_EVENT_RING, /* 1 canary, optional */
IPA_MEM_PDN_CONFIG, /* 0/2 canaries (IPA v4.0+) */
IPA_MEM_STATS_QUOTA_MODEM, /* 2/4 canaries (IPA v4.0+) */
--
2.33.0
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