[PATCH v2 2/2] remoteproc: qcom_q6v5_mss: Validate each segment during loading
From: Bjorn Andersson
Date: Fri Nov 08 2019 - 19:40:52 EST
The code used to sync with the MBA after each segment loaded and this is
still what's done downstream. So reduce the delta towards downstream by
switching to a model where the content is iteratively validated.
Reviewed-by: Jeffrey Hugo <jeffrey.l.hugo@xxxxxxxxx>
Tested-by: Jeffrey Hugo <jeffrey.l.hugo@xxxxxxxxx>
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
---
Changes since v1:
- Picked up Jeff's r-b and t-b
drivers/remoteproc/qcom_q6v5_mss.c | 76 ++++++++++++++++++++----------
1 file changed, 51 insertions(+), 25 deletions(-)
diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index efab574b2e12..914d5546e1cf 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -358,23 +358,29 @@ static void q6v5_pds_disable(struct q6v5 *qproc, struct device **pds,
}
static int q6v5_xfer_mem_ownership(struct q6v5 *qproc, int *current_perm,
- bool remote_owner, phys_addr_t addr,
+ bool local, bool remote, phys_addr_t addr,
size_t size)
{
- struct qcom_scm_vmperm next;
+ struct qcom_scm_vmperm next[2];
+ int perms = 0;
if (!qproc->need_mem_protection)
return 0;
- if (remote_owner && *current_perm == BIT(QCOM_SCM_VMID_MSS_MSA))
- return 0;
- if (!remote_owner && *current_perm == BIT(QCOM_SCM_VMID_HLOS))
- return 0;
- next.vmid = remote_owner ? QCOM_SCM_VMID_MSS_MSA : QCOM_SCM_VMID_HLOS;
- next.perm = remote_owner ? QCOM_SCM_PERM_RW : QCOM_SCM_PERM_RWX;
+ if (local) {
+ next[perms].vmid = QCOM_SCM_VMID_HLOS;
+ next[perms].perm = QCOM_SCM_PERM_RWX;
+ perms++;
+ }
+
+ if (remote) {
+ next[perms].vmid = QCOM_SCM_VMID_MSS_MSA;
+ next[perms].perm = QCOM_SCM_PERM_RW;
+ perms++;
+ }
return qcom_scm_assign_mem(addr, ALIGN(size, SZ_4K),
- current_perm, &next, 1);
+ current_perm, next, perms);
}
static int q6v5_load(struct rproc *rproc, const struct firmware *fw)
@@ -681,7 +687,7 @@ static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw)
/* Hypervisor mapping to access metadata by modem */
mdata_perm = BIT(QCOM_SCM_VMID_HLOS);
- ret = q6v5_xfer_mem_ownership(qproc, &mdata_perm, true, phys, size);
+ ret = q6v5_xfer_mem_ownership(qproc, &mdata_perm, false, true, phys, size);
if (ret) {
dev_err(qproc->dev,
"assigning Q6 access to metadata failed: %d\n", ret);
@@ -699,7 +705,7 @@ static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw)
dev_err(qproc->dev, "MPSS header authentication failed: %d\n", ret);
/* Metadata authentication done, remove modem access */
- xferop_ret = q6v5_xfer_mem_ownership(qproc, &mdata_perm, false, phys, size);
+ xferop_ret = q6v5_xfer_mem_ownership(qproc, &mdata_perm, true, false, phys, size);
if (xferop_ret)
dev_warn(qproc->dev,
"mdt buffer not reclaimed system may become unstable\n");
@@ -786,7 +792,7 @@ static int q6v5_mba_load(struct q6v5 *qproc)
}
/* Assign MBA image access in DDR to q6 */
- ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true,
+ ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, false, true,
qproc->mba_phys, qproc->mba_size);
if (ret) {
dev_err(qproc->dev,
@@ -820,8 +826,8 @@ static int q6v5_mba_load(struct q6v5 *qproc)
q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc);
reclaim_mba:
- xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, false,
- qproc->mba_phys,
+ xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true,
+ false, qproc->mba_phys,
qproc->mba_size);
if (xfermemop_ret) {
dev_err(qproc->dev,
@@ -888,7 +894,7 @@ static void q6v5_mba_reclaim(struct q6v5 *qproc)
/* In case of failure or coredump scenario where reclaiming MBA memory
* could not happen reclaim it here.
*/
- ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, false,
+ ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true, false,
qproc->mba_phys,
qproc->mba_size);
WARN_ON(ret);
@@ -915,6 +921,7 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
phys_addr_t boot_addr;
phys_addr_t min_addr = PHYS_ADDR_MAX;
phys_addr_t max_addr = 0;
+ u32 code_length;
bool relocate = false;
char *fw_name;
size_t fw_name_len;
@@ -965,9 +972,19 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
}
/* Try to reset ownership back to Linux */
- q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm, false,
+ q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm, true, false,
qproc->mpss_phys, qproc->mpss_size);
+ /* Share ownership between Linux and MSS, during segment loading */
+ ret = q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm, true, true,
+ qproc->mpss_phys, qproc->mpss_size);
+ if (ret) {
+ dev_err(qproc->dev,
+ "assigning Q6 access to mpss memory failed: %d\n", ret);
+ ret = -EAGAIN;
+ goto release_firmware;
+ }
+
mpss_reloc = relocate ? min_addr : qproc->mpss_phys;
qproc->mpss_reloc = mpss_reloc;
/* Load firmware segments */
@@ -1016,10 +1033,24 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
phdr->p_memsz - phdr->p_filesz);
}
size += phdr->p_memsz;
+
+ code_length = readl(qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
+ if (!code_length) {
+ boot_addr = relocate ? qproc->mpss_phys : min_addr;
+ writel(boot_addr, qproc->rmb_base + RMB_PMI_CODE_START_REG);
+ writel(RMB_CMD_LOAD_READY, qproc->rmb_base + RMB_MBA_COMMAND_REG);
+ }
+ writel(size, qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
+
+ ret = readl(qproc->rmb_base + RMB_MBA_STATUS_REG);
+ if (ret < 0) {
+ dev_err(qproc->dev, "MPSS authentication failed: %d\n", ret);
+ goto release_firmware;
+ }
}
/* Transfer ownership of modem ddr region to q6 */
- ret = q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm, true,
+ ret = q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm, false, true,
qproc->mpss_phys, qproc->mpss_size);
if (ret) {
dev_err(qproc->dev,
@@ -1028,11 +1059,6 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
goto release_firmware;
}
- boot_addr = relocate ? qproc->mpss_phys : min_addr;
- writel(boot_addr, qproc->rmb_base + RMB_PMI_CODE_START_REG);
- writel(RMB_CMD_LOAD_READY, qproc->rmb_base + RMB_MBA_COMMAND_REG);
- writel(size, qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
-
ret = q6v5_rmb_mba_wait(qproc, RMB_MBA_AUTH_COMPLETE, 10000);
if (ret == -ETIMEDOUT)
dev_err(qproc->dev, "MPSS authentication timed out\n");
@@ -1061,7 +1087,7 @@ static void qcom_q6v5_dump_segment(struct rproc *rproc,
ret = q6v5_mba_load(qproc);
/* Try to reset ownership back to Linux */
- q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm, false,
+ q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm, true, false,
qproc->mpss_phys, qproc->mpss_size);
}
@@ -1101,8 +1127,8 @@ static int q6v5_start(struct rproc *rproc)
goto reclaim_mpss;
}
- xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, false,
- qproc->mba_phys,
+ xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true,
+ false, qproc->mba_phys,
qproc->mba_size);
if (xfermemop_ret)
dev_err(qproc->dev,
--
2.23.0